US20060269646A1 - Molding metal mold and method for producing the molding metal mold - Google Patents
Molding metal mold and method for producing the molding metal mold Download PDFInfo
- Publication number
- US20060269646A1 US20060269646A1 US11/441,136 US44113606A US2006269646A1 US 20060269646 A1 US20060269646 A1 US 20060269646A1 US 44113606 A US44113606 A US 44113606A US 2006269646 A1 US2006269646 A1 US 2006269646A1
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- United States
- Prior art keywords
- metal mold
- insert
- body member
- spherical bodies
- molding metal
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/40—Removing or ejecting moulded articles
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/26—Moulds
- B29C45/2602—Mould construction elements
- B29C45/2606—Guiding or centering means
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/38—Cutting-off equipment for sprues or ingates
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/72—Heating or cooling
- B29C45/73—Heating or cooling of the mould
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2011/00—Optical elements, e.g. lenses, prisms
- B29L2011/0016—Lenses
Definitions
- the present invention relates to a molding metal mold and a method for producing the molding metal mold.
- a lens frame as a member for supporting an optical system such as a digital camera and a telephoto lens has a great influence on the precision of an optical axis of the optical system, and therefore needs to have a high processing accuracy. Because the accuracy of the optical axis is especially important for performance and quality of a product, in case the optical system uses ten lenses, for example, usually the lens frame is pre-manufactured such that one of the lenses can be fine-adjusted to make a final adjustment of the optical axis. Recently, a small lens frame produced by means of plastic molding is widely used as a lens frame for supporting an optical system of, for example, a film camera having a lens and a portable phone equipped with a camera. Further, the lens making up the optical system itself is formed by means of plastic injection molding. Also in the production of such a lens, the accuracy of the optical axis is vitally important.
- a molding metal mold 500 having a first metal mold 600 and a second metal mold 700 with a cavity formed therebetween in which a product is injection molded, as shown in FIG. 3 .
- the first metal mold 600 comprises: an insert 610 having a cavity surface 610 a ; a body member 620 for externally holding the insert 610 and having a convex taper 621 on an end surface on the side of the second metal mold 700 ; and ball bearings 630 interposed between the insert 610 and the body member 620 .
- the second metal mold 700 comprises: an insert 710 having a cavity surface 710 a ; a body member 720 for externally holding the insert 710 and having a concave taper 721 on an end surface on the side of the first metal mold 600 ; and ball bearings 730 interposed between the insert 710 and the body member 720 .
- alignment between the insert 610 and the body member 620 and between the insert 710 and the body member 720 is performed with the ball bearings 630 , 730 interposed therebetween, and alignment between the first metal mold 600 and the second metal mold 700 is conducted by means of the convex taper 621 and the concave taper 721 .
- the conventional molding metal mold 500 is constructed to remove the product from the cavity by moving the insert 610 when the mold is opened.
- the ball bearings 630 , 730 each comprise a plurality of spherical bodies and a retainer case that maintains the spherical bodies separated from each other.
- the number of spherical bodies that can be provided is limited because the retainer case is interposed between the spherical bodies.
- the larger the number of the spherical bodies supporting the inserts 610 , 710 the greater supporting rigidity the inserts 610 , 710 has with respect to the body members 620 , 720 .
- the conventional molding metal mold 500 because it has the retainer case, was incapable of increasing the supporting rigidity of the inserts 610 than a certain level. Small supporting rigidity of the inserts 610 would cause movement of the insert 610 during injection molding, thus resulting in a problem of disallowing an accurate production of a product.
- the conventional molding metal mold 500 has a clearance S for the insert 610 to move in when the mold is clamped, because the molding metal mold 500 is designed to remove the product from the cavity by pushing out the insert 610 from the body member 620 when the mold is opened.
- This increases the distance from the cavity surface 610 a of the insert 610 to a supporting point (a spherical body of one tip end of the ballbearings) of the insert 610 , causing a problem of reduced supporting rigidity (increased deflection amount) of the insert 610 and thus reduced product accuracy.
- the number of providable spherical bodies is limited by the retainer case interposed between the spherical bodies, which also restricts heat transmission path between the insert 610 and the body member 620 . This hampers a sufficient control of temperature increase of the insert due to melted resin, causing a problem of lengthened growth cycle.
- this invention aims to provide a molding metal mold capable of increasing supporting rigidity and heat transmissibility of the insert, and a method for producing the molding metal mold.
- the molding metal mold according to the present invention is one for forming a cavity between a first metal mold and a second metal mold and for molding a product the cavity, wherein the first metal mold comprises:
- a plurality of spherical bodies interposed between the insert and the body member and performing alignment of the insert, the plurality of spherical bodies being closely filled between the insert and the body member.
- the supporting rigidity of the insert can be increased compared to a conventional molding metal mold having a retainer case.
- the heat transmission path is increased between the insert and the body member, thus allowing rapid control of the insert temperature.
- the status in which “the plurality of spherical bodies are closely filled between the insert and the body member” means, for example, a status in which the space between the insert and the body member is filled only by the plurality of spherical bodies, without a retainer case and a spacer.
- the second metal mold is not limited to a specific construction, but may comprise an insert and a body member as in the first metal mold, or comprise a single member without being separated.
- At least one of the first and second metal molds preferably comprises an extrusion pin provided protrudably from the cavity surface.
- the plurality of spherical bodies are preferably filled between the insert and the body member, while being applied with preload.
- the insert can be supported with a greater supporting force, thereby allowing further increase of the supporting rigidity of the insert.
- metal spherical bodies may be used having a diameter slightly larger than the clearance between the insert and the body member. In this manner, the spherical bodies are filled therebetween while any of the body member, insert, and spherical bodies is elastically deformed, with its resilience acting as the preload.
- the insert comprises a column portion having the partial cavity surface; and the body member comprise: a small hole portion opening in one end portion of the body member and fitting with one end side of the column portion; a large hole portion opening in other end portion of the body member, linking with other end portion of the small hole portion, and freely fitting with other end portion of the column portion; and the plurality of spherical bodies be closely filled between an external circumference surface of the column portion and an internal circumference surface of the large hole portion.
- the supporting rigidity of the insert can be increased.
- one end side of the insert is fitted in the small hole portion and other end side of the insert is freely fitted to the large hole portion of the body member. This prevents that the spherical bodies fall off therefrom, and that a molding material to be filled in the cavity enters the space between the other end side of the insert and the large hole portion while a product is being molded.
- the shape of the cross-section of the column portion is not limited to a specific one, but may be a cylinder or a prism, for example.
- the above-mentioned molding metal mold is preferably produced by means of a method including: heating and thermally expanding the body member; and then filling the plurality of spherical bodies between the body member and the insert.
- the body member is heated and expanded, before the spherical bodies are closely filled between the body member and the insert. Therefore, spherical bodies larger than the clearance between the body member and the insert can be easily filled therebetween. Then, the heated and expanded body member returns to a normal temperature to shrink, thus applying preload to the spherical bodies. This can further increase the supporting rigidity of the insert.
- FIG. 1A is a cross sectional view of a molding metal mold according to the present embodiment, wherein the mold is clamped.
- FIG. 1B is a cross sectional view of a molding metal mold according to the present embodiment, wherein the mold is opened.
- FIG. 2A is a cross sectional view showing a step for filling spherical bodies between an insert and a body member.
- FIG. 2B is a cross sectional view showing a step for filling spherical bodies between an insert and a body member.
- FIG. 2C is a cross sectional view showing a step for filling spherical bodies between an insert and a body member.
- FIG. 2D is a cross sectional view showing a step for filling spherical bodies between an insert and a body member.
- FIG. 3 is a cross sectional view of a conventional molding metal mold.
- FIGS. 1A and 1B are cross sectional views of a molding metal mold according to the present embodiment, wherein the mold is clamped and opened, respectively.
- the molding metal mold 1 has a first metal mold 100 and a second metal mold 200 with a cavity C formed therebetween, in which a lens frame K is formed as a product.
- the lens frame K is a member for holding a plurality of lenses (not shown) constructing an optical system, which comprises a diaphragm s.
- one end side (right side in FIG. 1B ) of the diaphragm s is formed by a portion of the cavity C formed in the second metal mold 200 , and other side (left side in FIG.
- the molding metal mold 1 is a metal mold capable of accurately forming the lens frame K so that optical axes of lenses placed on both side of the diaphragms correspond to each other.
- the first metal mold 100 comprises: an insert 110 having, at tip end thereof, a partial cavity surface (hereinafter referred to as “cavity surface Ca”); a body member 120 to which the insert 110 is to be fitted; and metal spherical bodies 130 interposed between the insert 110 and the body member 120 , as shown in FIG. 1A .
- the insert 110 is a metal member provided as a separate part from the body member 120 for sharply forming an edge of the lens frame K, and comprises: an insert body 111 ; and a column portion 112 having a circular cross section extending from the center of one end side of the insert body 111 , as shown in FIG. 1B .
- the insert body 111 is a portion to be attached to a template of an injection molding apparatus (not shown), for example, and has a diameter larger than a large hole portion 122 to be described later.
- the column portion 112 is a portion to fit with the body member 120 , which comprises in the present embodiment: a small diameter portion 114 of a cylindrical shape having, on one end side thereof, the cavity surface Ca; and a large diameter portion 115 continuous to other end side of the small diameter portion 114 , having a larger diameter than the small diameter portion 114 , as shown in FIG. 1B .
- the body member 120 is a metal member for externally holding the insert 110 , having a cylindrical shape with a hollow portion at the center, as shown in FIG. 1B .
- the hollow portion of the body member 120 comprises: a small hole portion 121 to which is fitted the small diameter portion 114 formed on one end side of the column portion 112 of the insert 110 ; and the large hole portion 122 freely fitting with the large diameter portion 115 of the insert 110 .
- a convex taper portion 123 with a conical frustum shape is provided, capable of aligning with the second metal mold 200 .
- the small hole portion 121 is formed to be approximately the same as or slightly larger than the small diameter portion 114 of the insert 110 . Specifically, the small hole portion 121 is preferably larger than the small diameter portion 114 by 10-30 ⁇ m in diameter (5-15 ⁇ m in radius), and more preferably by 10-20 ⁇ m in diameter (5-10 ⁇ m in radius). One end side of the small hole portion 121 is an aperture on the surface on one end side of the body member 120 . When the small diameter portion 114 of the insert 110 is fitted into the small hole portion 121 , the cavity surface Ca formed on one end side of the small diameter portion 114 is exposed on the one end surface of the body member 120 . Further, on the one end side of the small hole portion 121 , a cavity surface Cb is formed.
- the large hole portion 122 is formed to have a size (caliber) such that a clearance same as or sightly smaller than the spherical bodies 130 in diameter is provided around the large diameter portion 115 when the large diameter portion 115 of the insert 110 is inserted to the large hole portion 122 .
- Other end side of the large hole portion 122 is an aperture on an end surface on other end side of the body member 120 , to which the column portion 112 of the insert 110 can be inserted.
- One end portion of the large hole portion 122 is linked to other end side of the small hole portion 121 .
- an extrusion pin E is provided for extruding a molded product from the cavity C.
- the extrusion pin E comprises: two pins connected at respective other end side; and an elastic body for biasing the two pins toward the second metal mold 200 .
- One of the pins abuts with other end side of the second metal mold when the mold is clamped, as shown in FIG. 1A .
- the other of the pins protrudes from the cavity surface when the mold is opened, as shown in FIG. 1B .
- the extrusion pin E is placed in a concave portion formed on the end surface on the one end side of the body member 120 .
- the concave portion has an aperture into which two members are fitted each having a through hole for inserting one of the pins.
- the spherical bodies 130 are metal spheres interposed between the body member 120 and the insert 110 , for supporting and aligning the insert 110 .
- the spherical bodies 130 are closely filled in the clearance between the large diameter portion 115 and the large hole portion 122 .
- the clearance between the large diameter portion 115 and the large hole portion 122 is filled only with a plurality of spherical bodies. Accordingly, the insert 110 is supported by more supporting points than when a retainer case or a space exists between the spherical bodies, which increases the supporting rigidity of the insert 110 with respect to the body member 120 .
- the spherical bodies 130 each have a diameter approximately the same of slightly larger than the clearance between the large diameter portion 115 and the large hole portion 122 .
- the spherical bodies 130 each preferably have a diameter larger by 1 to 6 ⁇ m than the clearance.
- the spherical bodies 130 are filled in the clearance between the large diameter portion 115 and the large hole portion 122 , while being elastically pressed.
- resilience of the spherical bodies 130 acts as preload which more rigidly supports the insert 110 .
- An external circumference surface of the large diameter portion 115 and an internal circumference surface of the large hole portion 122 also abut with the spherical body 130 to elastically deform, with the resultant resilience acting as preload.
- the spherical bodies filled closely and thus touching to each other prevents a movement thereof, and benefits in increasing the supporting rigidity.
- the large diameter portion 115 of the insert 110 has a length approximately the same as the large hole portion 122 of the body member 120 . Therefore, when the insert 110 is fitted into the body member 120 , there does not exist a clearance between a surface on one end side of the large diameter portion 115 and a surface on one end side of the large hole portion 122 . Accordingly, the spherical bodies can be filled up to the vicinity of the end surface on one end side of the large hole portion 122 , thus further increasing the supporting rigidity of the insert 110 .
- the second metal mold 200 comprises: an insert 210 having, at tip end thereof, a partial cavity surface (hereinafter referred to as “cavity surface Cb”); and a body member 220 into which the insert 210 is fitted, as shown in FIG. 1A .
- the insert 210 comprises: an insert body 211 ; and a column portion 212 having a circular cross section extending from other end side (the side of the first metal mold 100 ) of the insert body 211 , as shown in FIG. 1B .
- the column portion 212 has a conical frustum shape (taper shape), tapering toward other end side (the side of the first metal mold 100 ).
- the column portion 212 has, on other end side thereof, a partial cavity surface (hereinafter referred to as “cavity surface Cc”).
- the insert 210 comprises a sprue SP and a gate G linking one end side of the insert body 211 and the cavity surface Cc.
- the body member 220 is a member to which the column portion 212 of the insert 210 is fitted, for adjusting the positional relationship between the first metal mold 100 and the second metal mold 200 .
- the body member 220 is shaped in an approximate cylindrical, and has a flange formed on the other end side. As shown in FIG. 1B , the body member 220 has a hollow portion including from one to other end sides: a large hole portion 222 into which a column portion 212 of the insert 210 is fitted; a small hole portion 221 loosely fitting into the cavity surface Cc formed on other end side of the column portion 212 ; and a concave taper portion 223 fitting with the convex taper portion 123 of the first metal mold 100 .
- the large hole portion 222 is formed as a space with a taper shape tapering toward the other end side, and capable of aligning with the column portion 212 of the insert 210 fitted therein.
- the concave taper portion 223 is formed as a space with a taper shape tapering toward the one end side, and capable of aligning the first metal mold 100 and the second metal mold 100 .
- the small hole portion 221 is smaller than the large hole portion 222 in diameter, and has an internal circumference surface on which a cavity surface Cd is formed.
- Alignment of the molding metal mold 1 is carried out by fitting to each other the convex taper portion 123 of the first metal mold 100 and the concave taper portion 223 of the second metal mold 200 , as shown in FIGS. 1A, 1B . Also, by combining the first metal mold 100 and the second metal mold 200 , the cavity surfaces Ca, Cb, Cc, Cd are connected to each other to form the cavity C.
- FIGS. 2A to 2 D are cross sectional views each showing a step for filling spherical bodies therebetween.
- the column portion 112 of the insert 110 is inserted into the large hole portion 122 of the body member 120 so that one end side 115 a of the large diameter portion 115 and other end side 122 a of the large hole portion 122 are positioned at the same depth.
- the spherical bodies 130 are placed in the clearance T formed between one end side of the large diameter portion 115 and other end side of the large hole portion 122 .
- the clearance T is slightly smaller than the diameter of the spherical bodies 130 , the spherical bodies 13 do not enter the clearance T, being caught in the vicinity of the entrance of the clearance T.
- the column portion 112 of the insert 110 is pressed into the body member 120 by an amount corresponding to the diameter of the spherical bodies 130 , as shown in FIG. 2B .
- the spherical bodies 130 engage into the clearance T, rotating or sliding while elastically deforming, thus entering into the clearance T.
- the spherical bodies 130 be filled to the bottom of the clearance T by means of a dedicated tool therefor.
- a dedicated tool it is preferable to use one obtained, for example, by fitting two jigs, each having a semicircle shape, in the vicinity of other end side of the large diameter portion 115 , to form a ring shape. This tool is moved to the one end side along the large diameter portion 115 , so as to press the spherical bodies 130 into the clearance T.
- the body member 120 may be heated to expand, before the spherical bodies 130 are filled into the clearance T.
- This increases the clearance T between the body member 120 and the insert 110 (large diameter portion 115 ), thereby facilitating it to fill into the clearance T the spherical bodies 130 larger than the clearance T in diameter, at a normal temperature.
- the spherical bodies 130 are applied with preload. That is, this method, can easily introduce the preload.
- the spherical bodies 130 can be closely filled to (the bottom of) the one end side of the large hole portion 122 to the fullest. In this manner, the insert 110 is supported at a position close to the cavity surface Ca, thereby increasing the supporting rigidity of the insert 110 .
- Methods for heating the body member 120 includes, for example, pre-installing an electric heater in the body member 120 , wrapping the body member 120 in an electric heating mat, using infrared radiation for non-contact heating, or housing the body member 120 in a thermostatic oven.
- the methods using the electric heater and the electric heating mat, which allow the filling operation while maintaining the body member 120 at a high temperature, are especially preferred.
- the lower the temperature of the spherical bodies 130 the smaller the diameter thereof, it is preferred to carry out the filling operation while decreasing the temperature of the spherical bodies 130 as much as possible (without making the temperature high).
- the temperatures of the insert 110 and the spherical bodies 130 may be actively lowered by using a cool tank or coolant (e.g., cold water), for example.
- the present embodiment has discussed an example of applying the invention to a molding metal mold for producing the lens frame K
- the invention is not limited thereto but may be applied to a metal mold for producing high precision parts such as a plastic optical lens.
- the column portion 112 of the insert 110 comprises the small diameter portion 114 and the large diameter portion 115
- the column portion 112 may have the same and constant thickness as the small hole portion 121 of the body member 120 .
- the spherical bodies 130 are filled in the clearance between the insert 110 and the body member 120 in an orderly manner, as shown in FIGS. 1A, 1B and FIGS. 2A to 2 D, no limitation is placed thereon but the spherical body 130 may be filled in an unorderly manner.
- the spherical bodies 130 may be arranged in a rectangular lattice shape such that the centers of the spherical bodies 130 adjacent to each other in the direction of the axis of the metal mold are in parallel with the axis.
- the spherical bodies 130 may be arranged in a staggered shape such that the centers of the spherical bodies 130 adjacent to each other in the direction of the axis of the metal mold deviate in the direction of the circumference.
- the spherical bodies 130 can be filled more closely when arranged in the staggering shape than in the rectangular lattice shape.
- the clearance T preferably has a filling rate of not less than 20%, and more preferably of 50-65%.
Abstract
Description
- 1. Field of the Invention
- The present invention relates to a molding metal mold and a method for producing the molding metal mold.
- 2. Description of the Related Art
- A lens frame as a member for supporting an optical system such as a digital camera and a telephoto lens has a great influence on the precision of an optical axis of the optical system, and therefore needs to have a high processing accuracy. Because the accuracy of the optical axis is especially important for performance and quality of a product, in case the optical system uses ten lenses, for example, usually the lens frame is pre-manufactured such that one of the lenses can be fine-adjusted to make a final adjustment of the optical axis. Recently, a small lens frame produced by means of plastic molding is widely used as a lens frame for supporting an optical system of, for example, a film camera having a lens and a portable phone equipped with a camera. Further, the lens making up the optical system itself is formed by means of plastic injection molding. Also in the production of such a lens, the accuracy of the optical axis is vitally important.
- As a molding metal mold capable of accurately producing a product, a
molding metal mold 500 is known having afirst metal mold 600 and asecond metal mold 700 with a cavity formed therebetween in which a product is injection molded, as shown inFIG. 3 . See Japanese Patent Application Laid-Open (Kokai) No. 2003-231159 (FIG. 1), for example. Thefirst metal mold 600 comprises: aninsert 610 having acavity surface 610 a; abody member 620 for externally holding theinsert 610 and having aconvex taper 621 on an end surface on the side of thesecond metal mold 700; andball bearings 630 interposed between theinsert 610 and thebody member 620. Thesecond metal mold 700 comprises: aninsert 710 having acavity surface 710 a; abody member 720 for externally holding theinsert 710 and having aconcave taper 721 on an end surface on the side of thefirst metal mold 600; andball bearings 730 interposed between theinsert 710 and thebody member 720. - In such a metal mold, alignment between the
insert 610 and thebody member 620 and between theinsert 710 and thebody member 720 is performed with theball bearings first metal mold 600 and thesecond metal mold 700 is conducted by means of theconvex taper 621 and theconcave taper 721. - The conventional
molding metal mold 500 is constructed to remove the product from the cavity by moving theinsert 610 when the mold is opened. Thus, in the conventionalmolding metal mold 500, in order to prevent adjacent spherical bodies from being ground to each other and abraded when theinsert 610 moves, theball bearings - However, in such a conventional
molding metal mold 500, the number of spherical bodies that can be provided is limited because the retainer case is interposed between the spherical bodies. The larger the number of the spherical bodies supporting theinserts inserts body members molding metal mold 500, because it has the retainer case, was incapable of increasing the supporting rigidity of theinserts 610 than a certain level. Small supporting rigidity of theinserts 610 would cause movement of theinsert 610 during injection molding, thus resulting in a problem of disallowing an accurate production of a product. - Also, the conventional
molding metal mold 500 has a clearance S for theinsert 610 to move in when the mold is clamped, because themolding metal mold 500 is designed to remove the product from the cavity by pushing out theinsert 610 from thebody member 620 when the mold is opened. This increases the distance from thecavity surface 610 a of theinsert 610 to a supporting point (a spherical body of one tip end of the ballbearings) of theinsert 610, causing a problem of reduced supporting rigidity (increased deflection amount) of theinsert 610 and thus reduced product accuracy. - Further, in the conventional
molding metal mold 500, the number of providable spherical bodies is limited by the retainer case interposed between the spherical bodies, which also restricts heat transmission path between theinsert 610 and thebody member 620. This hampers a sufficient control of temperature increase of the insert due to melted resin, causing a problem of lengthened growth cycle. - In light of such a problem, this invention aims to provide a molding metal mold capable of increasing supporting rigidity and heat transmissibility of the insert, and a method for producing the molding metal mold.
- The molding metal mold according to the present invention is one for forming a cavity between a first metal mold and a second metal mold and for molding a product the cavity, wherein the first metal mold comprises:
- an insert having a part of a cavity surface on one end side;
- a body member for externally holding the insert; and
- a plurality of spherical bodies interposed between the insert and the body member and performing alignment of the insert, the plurality of spherical bodies being closely filled between the insert and the body member.
- According to this construction, because the plurality of spherical bodies are closely filled between the insert and the body member, the supporting rigidity of the insert can be increased compared to a conventional molding metal mold having a retainer case.
- Further, according to this construction, because the plurality of spherical bodies are closely filled between the insert and the body member, the heat transmission path is increased between the insert and the body member, thus allowing rapid control of the insert temperature.
- Here, the status in which “the plurality of spherical bodies are closely filled between the insert and the body member” means, for example, a status in which the space between the insert and the body member is filled only by the plurality of spherical bodies, without a retainer case and a spacer.
- Also, the second metal mold is not limited to a specific construction, but may comprise an insert and a body member as in the first metal mold, or comprise a single member without being separated.
- At least one of the first and second metal molds preferably comprises an extrusion pin provided protrudably from the cavity surface.
- According to this construction, it is not necessary to move the insert to remove the molded product, and therefore the spherical bodies are not ground to each other and abraded. Thus, omission of the retainer case and the space does not cause the spherical bodies to change in shape (diameter), which allows it to accurately locate the insert at a predetermined position. Also, because the insert and the body member are not fixed to each other unlike the case of “shrinkage fitting”, for example, it is easy to disintegrate the metal mold for maintenance.
- Further, because it is not necessary to provide a clearance (S in
FIG. 3 ) for the insert to move in, the distance between the cavity surface formed on one end side of the insert and the supporting point of the insert is reduced, thus increasing the supporting rigidity of the insert. - The plurality of spherical bodies are preferably filled between the insert and the body member, while being applied with preload.
- According to this construction, the insert can be supported with a greater supporting force, thereby allowing further increase of the supporting rigidity of the insert. To provide the spherical body with preload, metal spherical bodies may be used having a diameter slightly larger than the clearance between the insert and the body member. In this manner, the spherical bodies are filled therebetween while any of the body member, insert, and spherical bodies is elastically deformed, with its resilience acting as the preload.
- It is preferable that the insert comprises a column portion having the partial cavity surface; and the body member comprise: a small hole portion opening in one end portion of the body member and fitting with one end side of the column portion; a large hole portion opening in other end portion of the body member, linking with other end portion of the small hole portion, and freely fitting with other end portion of the column portion; and the plurality of spherical bodies be closely filled between an external circumference surface of the column portion and an internal circumference surface of the large hole portion.
- According to this construction, because the plurality of spherical bodies are closely filled between the external circumference surface of the column portion and the internal circumference surface of the large hole portion, the supporting rigidity of the insert can be increased.
- Also, one end side of the insert is fitted in the small hole portion and other end side of the insert is freely fitted to the large hole portion of the body member. This prevents that the spherical bodies fall off therefrom, and that a molding material to be filled in the cavity enters the space between the other end side of the insert and the large hole portion while a product is being molded.
- It is to be noted that the shape of the cross-section of the column portion is not limited to a specific one, but may be a cylinder or a prism, for example.
- The above-mentioned molding metal mold is preferably produced by means of a method including: heating and thermally expanding the body member; and then filling the plurality of spherical bodies between the body member and the insert.
- According to this method, the body member is heated and expanded, before the spherical bodies are closely filled between the body member and the insert. Therefore, spherical bodies larger than the clearance between the body member and the insert can be easily filled therebetween. Then, the heated and expanded body member returns to a normal temperature to shrink, thus applying preload to the spherical bodies. This can further increase the supporting rigidity of the insert.
- According to the present invention, because a plurality of spherical bodies are closely filled between the insert and the body member, supporting rigidity of the insert can be increased, thereby allowing highly accurate molding of a product.
- Further, according to the present invention, because a plurality of spherical bodies are closely filled between the insert and the body member, there exist more heat paths between the body member and the insert than when the retainer is interposed between the spherical bodies. As a result, more accurate control of the insert temperature becomes possible.
-
FIG. 1A is a cross sectional view of a molding metal mold according to the present embodiment, wherein the mold is clamped. -
FIG. 1B is a cross sectional view of a molding metal mold according to the present embodiment, wherein the mold is opened. -
FIG. 2A is a cross sectional view showing a step for filling spherical bodies between an insert and a body member. -
FIG. 2B is a cross sectional view showing a step for filling spherical bodies between an insert and a body member. -
FIG. 2C is a cross sectional view showing a step for filling spherical bodies between an insert and a body member. -
FIG. 2D is a cross sectional view showing a step for filling spherical bodies between an insert and a body member. -
FIG. 3 is a cross sectional view of a conventional molding metal mold. - Referring to the drawings, the best mode for carrying out the invention will be described in detail. In the description, the same elements are attached with the same numbers and a redundant description will be omitted. The present embodiment will describe a case in which the invention is applied to produce a lens mirror.
- First, a construction of a molding metal mold according to the present embodiment will be described.
- Reference will be made to
FIGS. 1A and 1B , which are cross sectional views of a molding metal mold according to the present embodiment, wherein the mold is clamped and opened, respectively. - As shown in
FIG. 1A , themolding metal mold 1 has afirst metal mold 100 and asecond metal mold 200 with a cavity C formed therebetween, in which a lens frame K is formed as a product. As shown inFIG. 1B , the lens frame K is a member for holding a plurality of lenses (not shown) constructing an optical system, which comprises a diaphragm s. In the present embodiment, of the construction of the lens frame K, one end side (right side inFIG. 1B ) of the diaphragm s is formed by a portion of the cavity C formed in thesecond metal mold 200, and other side (left side inFIG. 1B ) of the diaphragm s is formed by a portion of the cavity C formed in thesecond metal mold 100. Themolding metal mold 1 according to the present embodiment is a metal mold capable of accurately forming the lens frame K so that optical axes of lenses placed on both side of the diaphragms correspond to each other. - The
first metal mold 100 comprises: aninsert 110 having, at tip end thereof, a partial cavity surface (hereinafter referred to as “cavity surface Ca”); abody member 120 to which theinsert 110 is to be fitted; and metalspherical bodies 130 interposed between theinsert 110 and thebody member 120, as shown inFIG. 1A . - The
insert 110 is a metal member provided as a separate part from thebody member 120 for sharply forming an edge of the lens frame K, and comprises: aninsert body 111; and acolumn portion 112 having a circular cross section extending from the center of one end side of theinsert body 111, as shown inFIG. 1B . - The
insert body 111 is a portion to be attached to a template of an injection molding apparatus (not shown), for example, and has a diameter larger than alarge hole portion 122 to be described later. - The
column portion 112 is a portion to fit with thebody member 120, which comprises in the present embodiment: asmall diameter portion 114 of a cylindrical shape having, on one end side thereof, the cavity surface Ca; and alarge diameter portion 115 continuous to other end side of thesmall diameter portion 114, having a larger diameter than thesmall diameter portion 114, as shown inFIG. 1B . - The
body member 120 is a metal member for externally holding theinsert 110, having a cylindrical shape with a hollow portion at the center, as shown inFIG. 1B . The hollow portion of thebody member 120 comprises: asmall hole portion 121 to which is fitted thesmall diameter portion 114 formed on one end side of thecolumn portion 112 of theinsert 110; and thelarge hole portion 122 freely fitting with thelarge diameter portion 115 of theinsert 110. On an end surface on one end side of thebody member 120, aconvex taper portion 123 with a conical frustum shape is provided, capable of aligning with thesecond metal mold 200. - The
small hole portion 121 is formed to be approximately the same as or slightly larger than thesmall diameter portion 114 of theinsert 110. Specifically, thesmall hole portion 121 is preferably larger than thesmall diameter portion 114 by 10-30 μm in diameter (5-15 μm in radius), and more preferably by 10-20 μm in diameter (5-10 μm in radius). One end side of thesmall hole portion 121 is an aperture on the surface on one end side of thebody member 120. When thesmall diameter portion 114 of theinsert 110 is fitted into thesmall hole portion 121, the cavity surface Ca formed on one end side of thesmall diameter portion 114 is exposed on the one end surface of thebody member 120. Further, on the one end side of thesmall hole portion 121, a cavity surface Cb is formed. - The
large hole portion 122 is formed to have a size (caliber) such that a clearance same as or sightly smaller than thespherical bodies 130 in diameter is provided around thelarge diameter portion 115 when thelarge diameter portion 115 of theinsert 110 is inserted to thelarge hole portion 122. Other end side of thelarge hole portion 122 is an aperture on an end surface on other end side of thebody member 120, to which thecolumn portion 112 of theinsert 110 can be inserted. One end portion of thelarge hole portion 122 is linked to other end side of thesmall hole portion 121. - On the end surface on the one end side of the
body member 120, an extrusion pin E is provided for extruding a molded product from the cavity C. The extrusion pin E comprises: two pins connected at respective other end side; and an elastic body for biasing the two pins toward thesecond metal mold 200. One of the pins abuts with other end side of the second metal mold when the mold is clamped, as shown inFIG. 1A . The other of the pins protrudes from the cavity surface when the mold is opened, as shown inFIG. 1B . The extrusion pin E is placed in a concave portion formed on the end surface on the one end side of thebody member 120. The concave portion has an aperture into which two members are fitted each having a through hole for inserting one of the pins. - The
spherical bodies 130 are metal spheres interposed between thebody member 120 and theinsert 110, for supporting and aligning theinsert 110. Thespherical bodies 130 are closely filled in the clearance between thelarge diameter portion 115 and thelarge hole portion 122. In other words, the clearance between thelarge diameter portion 115 and thelarge hole portion 122 is filled only with a plurality of spherical bodies. Accordingly, theinsert 110 is supported by more supporting points than when a retainer case or a space exists between the spherical bodies, which increases the supporting rigidity of theinsert 110 with respect to thebody member 120. - The
spherical bodies 130 each have a diameter approximately the same of slightly larger than the clearance between thelarge diameter portion 115 and thelarge hole portion 122. Specifically, thespherical bodies 130 each preferably have a diameter larger by 1 to 6 μm than the clearance. In this manner, thespherical bodies 130 are filled in the clearance between thelarge diameter portion 115 and thelarge hole portion 122, while being elastically pressed. As a result, resilience of thespherical bodies 130 acts as preload which more rigidly supports theinsert 110. An external circumference surface of thelarge diameter portion 115 and an internal circumference surface of thelarge hole portion 122 also abut with thespherical body 130 to elastically deform, with the resultant resilience acting as preload. - Further, the spherical bodies filled closely and thus touching to each other prevents a movement thereof, and benefits in increasing the supporting rigidity.
- The
large diameter portion 115 of theinsert 110 has a length approximately the same as thelarge hole portion 122 of thebody member 120. Therefore, when theinsert 110 is fitted into thebody member 120, there does not exist a clearance between a surface on one end side of thelarge diameter portion 115 and a surface on one end side of thelarge hole portion 122. Accordingly, the spherical bodies can be filled up to the vicinity of the end surface on one end side of thelarge hole portion 122, thus further increasing the supporting rigidity of theinsert 110. - The
second metal mold 200 comprises: aninsert 210 having, at tip end thereof, a partial cavity surface (hereinafter referred to as “cavity surface Cb”); and abody member 220 into which theinsert 210 is fitted, as shown inFIG. 1A . - The
insert 210 comprises: aninsert body 211; and acolumn portion 212 having a circular cross section extending from other end side (the side of the first metal mold 100) of theinsert body 211, as shown inFIG. 1B . Thecolumn portion 212 has a conical frustum shape (taper shape), tapering toward other end side (the side of the first metal mold 100). Thecolumn portion 212 has, on other end side thereof, a partial cavity surface (hereinafter referred to as “cavity surface Cc”). Theinsert 210 comprises a sprue SP and a gate G linking one end side of theinsert body 211 and the cavity surface Cc. - The
body member 220 is a member to which thecolumn portion 212 of theinsert 210 is fitted, for adjusting the positional relationship between thefirst metal mold 100 and thesecond metal mold 200. Thebody member 220 is shaped in an approximate cylindrical, and has a flange formed on the other end side. As shown inFIG. 1B , thebody member 220 has a hollow portion including from one to other end sides: alarge hole portion 222 into which acolumn portion 212 of theinsert 210 is fitted; asmall hole portion 221 loosely fitting into the cavity surface Cc formed on other end side of thecolumn portion 212; and aconcave taper portion 223 fitting with theconvex taper portion 123 of thefirst metal mold 100. Thelarge hole portion 222 is formed as a space with a taper shape tapering toward the other end side, and capable of aligning with thecolumn portion 212 of theinsert 210 fitted therein. Theconcave taper portion 223 is formed as a space with a taper shape tapering toward the one end side, and capable of aligning thefirst metal mold 100 and thesecond metal mold 100. Thesmall hole portion 221 is smaller than thelarge hole portion 222 in diameter, and has an internal circumference surface on which a cavity surface Cd is formed. - Alignment of the
molding metal mold 1 is carried out by fitting to each other theconvex taper portion 123 of thefirst metal mold 100 and theconcave taper portion 223 of thesecond metal mold 200, as shown inFIGS. 1A, 1B . Also, by combining thefirst metal mold 100 and thesecond metal mold 200, the cavity surfaces Ca, Cb, Cc, Cd are connected to each other to form the cavity C. - Next, a method will be discussed for closely filling the
spherical bodies 130 between theinsert 110 and thebody member 120.FIGS. 2A to 2D are cross sectional views each showing a step for filling spherical bodies therebetween. - First, as shown in
FIG. 2A , thecolumn portion 112 of theinsert 110 is inserted into thelarge hole portion 122 of thebody member 120 so that oneend side 115 a of thelarge diameter portion 115 andother end side 122 a of thelarge hole portion 122 are positioned at the same depth. Then, thespherical bodies 130 are placed in the clearance T formed between one end side of thelarge diameter portion 115 and other end side of thelarge hole portion 122. At this time, because the clearance T is slightly smaller than the diameter of thespherical bodies 130, the spherical bodies 13 do not enter the clearance T, being caught in the vicinity of the entrance of the clearance T. - Next, the
column portion 112 of theinsert 110 is pressed into thebody member 120 by an amount corresponding to the diameter of thespherical bodies 130, as shown inFIG. 2B . At this time, by pressing one of thespherical bodies 130 to the one end side along with theinsert 110, thespherical bodies 130 engage into the clearance T, rotating or sliding while elastically deforming, thus entering into the clearance T. - When the
spherical bodies 130 have entered into the clearance T by the amount of the diameter thereof, subsequentspherical bodies 130 are placed in the vicinity of the entrance of the clearance T, as shown inFIG. 2C . - Then, by repeating several times the pressing of the column portion 112 (
FIG. 2B ) and the placement of the spherical bodies 130 (FIG. 2C ), a plurality ofspherical bodies 130 can be closely filled into the clearance T, as shown inFIG. 2D . - It is preferred that the
spherical bodies 130 be filled to the bottom of the clearance T by means of a dedicated tool therefor. As such a dedicated tool, it is preferable to use one obtained, for example, by fitting two jigs, each having a semicircle shape, in the vicinity of other end side of thelarge diameter portion 115, to form a ring shape. This tool is moved to the one end side along thelarge diameter portion 115, so as to press thespherical bodies 130 into the clearance T. - As another filling method, the
body member 120 may be heated to expand, before thespherical bodies 130 are filled into the clearance T. This increases the clearance T between thebody member 120 and the insert 110 (large diameter portion 115), thereby facilitating it to fill into the clearance T thespherical bodies 130 larger than the clearance T in diameter, at a normal temperature. Also, as the temperatures of thebody member 120, theinsert 110 and thespherical bodies 130 become uniform, thespherical bodies 130 are applied with preload. That is, this method, can easily introduce the preload. - Further, if the clearance T is sufficiently larger than the diameter of the
spherical bodies 130 when thebody member 120 expands, then thespherical bodies 130 can be closely filled to (the bottom of) the one end side of thelarge hole portion 122 to the fullest. In this manner, theinsert 110 is supported at a position close to the cavity surface Ca, thereby increasing the supporting rigidity of theinsert 110. - Methods for heating the
body member 120 includes, for example, pre-installing an electric heater in thebody member 120, wrapping thebody member 120 in an electric heating mat, using infrared radiation for non-contact heating, or housing thebody member 120 in a thermostatic oven. The methods using the electric heater and the electric heating mat, which allow the filling operation while maintaining thebody member 120 at a high temperature, are especially preferred. - Also, because the greater the temperature difference between the
insert 110 and thebody member 120, the larger the clearance T becomes, it is preferred to perform the filling operation while decreasing the temperature of theinsert 110 as much as possible (without making the temperature high). Further, because the lower the temperature of thespherical bodies 130, the smaller the diameter thereof, it is preferred to carry out the filling operation while decreasing the temperature of thespherical bodies 130 as much as possible (without making the temperature high). The temperatures of theinsert 110 and thespherical bodies 130 may be actively lowered by using a cool tank or coolant (e.g., cold water), for example. - Although the best mode for implementing the present invention has been described in detail with reference to the drawings heretofore, the invention is not limited thereto, but may be modified as needed within the scope and spirit of the present invention.
- For example, although the present embodiment has discussed an example of applying the invention to a molding metal mold for producing the lens frame K, the invention is not limited thereto but may be applied to a metal mold for producing high precision parts such as a plastic optical lens.
- Although, in the embodiment, the
column portion 112 of theinsert 110 comprises thesmall diameter portion 114 and thelarge diameter portion 115, no limitation is placed thereon, but thecolumn portion 112 may have the same and constant thickness as thesmall hole portion 121 of thebody member 120. In such a case, it is preferred to use spherical bodies having a diameter slightly larger than the difference between the radiuses of thelarge hole portion 122 and thesmall hole portion 121. - Although, in the embodiment, the
spherical bodies 130 are filled in the clearance between theinsert 110 and thebody member 120 in an orderly manner, as shown inFIGS. 1A, 1B andFIGS. 2A to 2D, no limitation is placed thereon but thespherical body 130 may be filled in an unorderly manner. - No specific limitation is placed on the arrangement (method of placement) of the
spherical bodies 130. For example, thespherical bodies 130 may be arranged in a rectangular lattice shape such that the centers of thespherical bodies 130 adjacent to each other in the direction of the axis of the metal mold are in parallel with the axis. Alternatively, thespherical bodies 130 may be arranged in a staggered shape such that the centers of thespherical bodies 130 adjacent to each other in the direction of the axis of the metal mold deviate in the direction of the circumference. Thespherical bodies 130 can be filled more closely when arranged in the staggering shape than in the rectangular lattice shape. The clearance T preferably has a filling rate of not less than 20%, and more preferably of 50-65%.
Claims (20)
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
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JP2005153376 | 2005-05-26 | ||
JP2005-153376 | 2005-05-26 | ||
JP2005-287466 | 2005-09-30 | ||
JP2005287466A JP4773789B2 (en) | 2005-05-26 | 2005-09-30 | Mold for molding and manufacturing method thereof |
Publications (1)
Publication Number | Publication Date |
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US20060269646A1 true US20060269646A1 (en) | 2006-11-30 |
Family
ID=37463715
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Application Number | Title | Priority Date | Filing Date |
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US11/441,136 Abandoned US20060269646A1 (en) | 2005-05-26 | 2006-05-26 | Molding metal mold and method for producing the molding metal mold |
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US (1) | US20060269646A1 (en) |
JP (1) | JP4773789B2 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20090169669A1 (en) * | 2007-12-29 | 2009-07-02 | Hon Hai Precision Industry Co., Ltd. | Mold for molding lens |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2007111917A (en) * | 2005-10-18 | 2007-05-10 | Fujifilm Corp | Mold and mold assembling method |
CN102096166B (en) * | 2010-12-13 | 2012-06-06 | 泉州市东南光电有限公司 | Lens barrel forming mold |
Citations (21)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US626274A (en) * | 1899-06-06 | Matiiieu foidart | ||
US3761220A (en) * | 1970-09-10 | 1973-09-25 | Philips Corp | Pressing device |
US4266723A (en) * | 1979-11-02 | 1981-05-12 | Incoe Corporation | Nozzle for injection molding machines |
US4795125A (en) * | 1983-03-25 | 1989-01-03 | Kozponti Valto-Es Hitelbank Rt., Innovacios Alap | Mold or die assembly |
US5360330A (en) * | 1992-01-31 | 1994-11-01 | Engineering & Research Associates, Inc. | RF heated mold for thermoplastic materials |
US5405652A (en) * | 1992-07-21 | 1995-04-11 | Matsushita Electric Industrial Co., Ltd. | Method of manufacturing a die for use in molding glass optical elements having a fine pattern of concavities and convexities |
US5545366A (en) * | 1994-06-10 | 1996-08-13 | Lust; Victor | Molding arrangement to achieve short mold cycle time and method of molding |
US5616161A (en) * | 1992-06-02 | 1997-04-01 | Sumitomo Heavy Industries, Ltd. | Machining chamber for a glass compresson molding machine |
US5695288A (en) * | 1995-10-20 | 1997-12-09 | Nippon Thompson Co., Ltd. | Linear motion rolling bearing of the rolling bearing with lubricant insertion holes in end seals |
US5766526A (en) * | 1994-04-20 | 1998-06-16 | Fuji Photo Film Co., Ltd. | Method and apparatus for injection molding |
US5843485A (en) * | 1996-06-28 | 1998-12-01 | Incoe Corporation | Valve-gate bushing for gas-assisted injection molding |
US6027325A (en) * | 1997-03-11 | 2000-02-22 | Piotrowski; Tadeusz W. | Machines for manufacturing hollow objects in thermoplastic materials |
US6368096B1 (en) * | 2000-07-31 | 2002-04-09 | Bausch & Lomb Incorporated | Apparatus for separating material from a mold surface |
US20030203066A1 (en) * | 1999-05-05 | 2003-10-30 | Victor Lust | Mold, molding system and molding machine for making ophthalmic devices |
US6884369B2 (en) * | 2001-12-17 | 2005-04-26 | Essilor International (Compagnie Generale D'optique | Mold and a method of hot-forming a thermoplastic lens |
US20050136147A1 (en) * | 2003-12-17 | 2005-06-23 | Asia Optical Co., Inc. | Molding apparatus with removable mold cores |
US6939120B1 (en) * | 2002-09-12 | 2005-09-06 | Komag, Inc. | Disk alignment apparatus and method for patterned media production |
US20060269647A1 (en) * | 2005-05-26 | 2006-11-30 | Fuji Photo Film Co., Ltd. | Molding metal mold and method for producing a molded item |
US7198477B2 (en) * | 2003-12-24 | 2007-04-03 | Lear Corporation | Mechanical shut-off valve for gas-assist injection molding |
US7320587B2 (en) * | 2005-08-09 | 2008-01-22 | Cooper Vision, Inc. | Contact lens molds and systems and methods for producing same |
US7381047B2 (en) * | 2005-10-17 | 2008-06-03 | Fujifilm Corporation | Mold |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0458602A (en) * | 1990-06-28 | 1992-02-25 | Nec Corp | Delay line device |
JPH07329133A (en) * | 1994-06-10 | 1995-12-19 | Mitsubishi Materials Corp | Mold apparatus for injection compression molding and assembling method thereof |
JPH08169722A (en) * | 1994-10-06 | 1996-07-02 | Olympus Optical Co Ltd | Method and device for forming glass optical element |
JPH0952258A (en) * | 1995-08-10 | 1997-02-25 | Mitsui Toatsu Chem Inc | Mold device for injection molding and manufacture of cylindrical molding having slender through hole by using the same |
JP4457467B2 (en) * | 2000-06-15 | 2010-04-28 | 双葉電子工業株式会社 | Molding mold positioning device |
JP2003161316A (en) * | 2001-11-26 | 2003-06-06 | Nsk Ltd | Head stuck assembly and method for mounting bearing unit on the head stuck assembly |
JP2004190734A (en) * | 2002-12-09 | 2004-07-08 | Nsk Ltd | Rolling bearing |
JP2003269464A (en) * | 2002-03-18 | 2003-09-25 | Nsk Ltd | Linear motion device |
JP4121365B2 (en) * | 2002-12-18 | 2008-07-23 | 株式会社東伸精工 | Injection mold for plastic optical lens and method for producing plastic optical lens |
JP2004249660A (en) * | 2003-02-21 | 2004-09-09 | Canon Chemicals Inc | Method for venting in injection molding processing |
-
2005
- 2005-09-30 JP JP2005287466A patent/JP4773789B2/en not_active Expired - Fee Related
-
2006
- 2006-05-26 US US11/441,136 patent/US20060269646A1/en not_active Abandoned
Patent Citations (22)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US626274A (en) * | 1899-06-06 | Matiiieu foidart | ||
US3761220A (en) * | 1970-09-10 | 1973-09-25 | Philips Corp | Pressing device |
US4266723A (en) * | 1979-11-02 | 1981-05-12 | Incoe Corporation | Nozzle for injection molding machines |
US4795125A (en) * | 1983-03-25 | 1989-01-03 | Kozponti Valto-Es Hitelbank Rt., Innovacios Alap | Mold or die assembly |
US5360330A (en) * | 1992-01-31 | 1994-11-01 | Engineering & Research Associates, Inc. | RF heated mold for thermoplastic materials |
US5616161A (en) * | 1992-06-02 | 1997-04-01 | Sumitomo Heavy Industries, Ltd. | Machining chamber for a glass compresson molding machine |
US5405652A (en) * | 1992-07-21 | 1995-04-11 | Matsushita Electric Industrial Co., Ltd. | Method of manufacturing a die for use in molding glass optical elements having a fine pattern of concavities and convexities |
US5766526B1 (en) * | 1994-04-20 | 1999-08-24 | Fuji Photo Film Co Ltd | Method and apparatus for injection molding |
US5766526A (en) * | 1994-04-20 | 1998-06-16 | Fuji Photo Film Co., Ltd. | Method and apparatus for injection molding |
US5545366A (en) * | 1994-06-10 | 1996-08-13 | Lust; Victor | Molding arrangement to achieve short mold cycle time and method of molding |
US5695288A (en) * | 1995-10-20 | 1997-12-09 | Nippon Thompson Co., Ltd. | Linear motion rolling bearing of the rolling bearing with lubricant insertion holes in end seals |
US5843485A (en) * | 1996-06-28 | 1998-12-01 | Incoe Corporation | Valve-gate bushing for gas-assisted injection molding |
US6027325A (en) * | 1997-03-11 | 2000-02-22 | Piotrowski; Tadeusz W. | Machines for manufacturing hollow objects in thermoplastic materials |
US20030203066A1 (en) * | 1999-05-05 | 2003-10-30 | Victor Lust | Mold, molding system and molding machine for making ophthalmic devices |
US6368096B1 (en) * | 2000-07-31 | 2002-04-09 | Bausch & Lomb Incorporated | Apparatus for separating material from a mold surface |
US6884369B2 (en) * | 2001-12-17 | 2005-04-26 | Essilor International (Compagnie Generale D'optique | Mold and a method of hot-forming a thermoplastic lens |
US6939120B1 (en) * | 2002-09-12 | 2005-09-06 | Komag, Inc. | Disk alignment apparatus and method for patterned media production |
US20050136147A1 (en) * | 2003-12-17 | 2005-06-23 | Asia Optical Co., Inc. | Molding apparatus with removable mold cores |
US7198477B2 (en) * | 2003-12-24 | 2007-04-03 | Lear Corporation | Mechanical shut-off valve for gas-assist injection molding |
US20060269647A1 (en) * | 2005-05-26 | 2006-11-30 | Fuji Photo Film Co., Ltd. | Molding metal mold and method for producing a molded item |
US7320587B2 (en) * | 2005-08-09 | 2008-01-22 | Cooper Vision, Inc. | Contact lens molds and systems and methods for producing same |
US7381047B2 (en) * | 2005-10-17 | 2008-06-03 | Fujifilm Corporation | Mold |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20090169669A1 (en) * | 2007-12-29 | 2009-07-02 | Hon Hai Precision Industry Co., Ltd. | Mold for molding lens |
US7980848B2 (en) * | 2007-12-29 | 2011-07-19 | Hon Hai Precision Industry Co., Ltd. | Mold for molding lens |
Also Published As
Publication number | Publication date |
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JP2007001282A (en) | 2007-01-11 |
JP4773789B2 (en) | 2011-09-14 |
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Owner name: FUJI PHOTO FILM CO., LTD., JAPAN Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:WATANABE, SEIICHI;MISONOO, KAZUTOSHI;EIHA, NORIKO;REEL/FRAME:017940/0810 Effective date: 20060516 |
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Owner name: FUJIFILM CORPORATION, JAPAN Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:FUJIFILM HOLDINGS CORPORATION (FORMERLY FUJI PHOTO FILM CO., LTD.);REEL/FRAME:018904/0001 Effective date: 20070130 Owner name: FUJIFILM CORPORATION,JAPAN Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:FUJIFILM HOLDINGS CORPORATION (FORMERLY FUJI PHOTO FILM CO., LTD.);REEL/FRAME:018904/0001 Effective date: 20070130 |
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