CN101107108B - Center heated die plate for underwater pelletizer - Google Patents
Center heated die plate for underwater pelletizer Download PDFInfo
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- CN101107108B CN101107108B CN2006800030138A CN200680003013A CN101107108B CN 101107108 B CN101107108 B CN 101107108B CN 2006800030138 A CN2006800030138 A CN 2006800030138A CN 200680003013 A CN200680003013 A CN 200680003013A CN 101107108 B CN101107108 B CN 101107108B
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- Prior art keywords
- template
- heater
- cylindrical hollow
- hollow inside
- extrusion cavities
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B9/00—Making granules
- B29B9/02—Making granules by dividing preformed material
- B29B9/06—Making granules by dividing preformed material in the form of filamentary material, e.g. combined with extrusion
- B29B9/065—Making granules by dividing preformed material in the form of filamentary material, e.g. combined with extrusion under-water, e.g. underwater pelletizers
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B7/00—Mixing; Kneading
- B29B7/30—Mixing; Kneading continuous, with mechanical mixing or kneading devices
- B29B7/58—Component parts, details or accessories; Auxiliary operations
- B29B7/582—Component parts, details or accessories; Auxiliary operations for discharging, e.g. doors
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B7/00—Mixing; Kneading
- B29B7/80—Component parts, details or accessories; Auxiliary operations
- B29B7/82—Heating or cooling
- B29B7/826—Apparatus therefor
Abstract
A central heating templet for an underwater granulating machine, which emits the quantity of heat outwardly to the extruding outlet and the surface of the templet so as to maintain the templet and extruding outlet in an increased temperature to get an optimized flow that the melting polymer passes through the extruding outlet. In an embodiment, a heating plate in center is fixed on an upstream face of the templet, facing to the concave portion in the front cone. In the second embodiment, cylinder shaped heating loop is arranged between the front cone at the upstream side and the insulated plug at the downstream side or between the plates, in the templet hollow central borehole. The heating wire extends through a single radial hole in the templet so as to supply the power to the central heating element.
Description
Technical field
The present invention relates generally to be used for the heated die plate of underwater pelletizer (underwater pelletizer or be called the wet type comminutor), especially relate to the center heated die that is used for underwater pelletizer.
Background technology
Underwater pelletizer is known, and comprises the template with a plurality of extrusion cavities, and described a plurality of extrusion cavities extend to the downstream from the upstream side of template, but so that extrudes the condensate of fusing or the wire harness of other extruded materials.These extrusion cavities center with template of being arranged to is the one or more circular patterns of common center and the relation that becomes to be radially spaced with the center of template, and described extrusion cavities is arranged to relative to each other spaced apart.The wire harness of extruding of condensate or other materials is cut into particle (or granule) by the cutting machine blade that is rotated in the water tank.Blade cuts into wire harness by the particle of water cooling in the water tank and curing.The slurry of particle and water (slurry) is discharged from water tank, so that remove moisture from the outer surface of particle subsequently.
It is desirable for template and hole are maintained the temperature of raising, so that optimally extrude the condensate of fusing by extrusion cavities.Made various effort and come heated die plate, comprise use in template, add the hot fluid circular flow and cross its passage.And radial cavities has been formed on the periphery of template, and the electrical heating tube is inserted in the described radial cavities from the neighboring of template.These known structures typically below by the application the assignee had and comprise in the United States Patent (USP) to the explanation of heated die plate and obtain explanation: US Nos.4123207,4621996,4728276,5403176 and 5624688.
As illustrated in the above-mentioned patent, have the passage of the heated die plate of extrusion cavities of concentric circular pattern and the fluid that is used to heat and be used to hold the cavity of cartridge heater or the heated die plate of depression is known.The cavity that the part that these templates need extrusion cavities will normally pass it is used to add the passage of hot fluid or be used for cartridge heater takies.Thus, these passages or cavity have reduced the quantity that can be encased in the extrusion cavities in the template, because carry the depression add the passage of hot fluid or to hold cartridge heater to save extrusion cavities from these zones of template.And, add zone of heat liberation and the heating cylindrical cavity trends towards heat radiation is concentrated in the zone near passage or cavity.
Summary of the invention
Center heated die of the present invention is installed between the extruder (extruder) and water tank of underwater pelletizer in a conventional manner.The upstream side of described template receives the condensate of fusing from extruder, and the condensate of fusing is extruded the polymer strands of extruding with formation by a plurality of holes, and described a plurality of holes extend to the downstream from the upstream side of template.The described polymer strands extruded is by the water cooling by water tank, and the mode of knowing in the cutting machine blade that is associated with the downstream of template by rotation, the technology with comminutor under water is cut into particle.
In the present invention, the circular orifice pattern of described template is kept, and the core of template is provided with stratie.In one embodiment of the invention, the center of the upstream face of template (contiguous precentrum) is removed or cuts with the hollow of formation precentrum inside or the circular central region of depression.Circular heating plate is positioned at towards the central area of the depression of precentrum inside, and is used for the center of heated die plate between precentrum and template.The flat bottom surface of circular heating plate is positioned to flush with the bottom of the central area of caving in, and face contacts to provide completely, thereby flows directly to template from the heat of heating plate.
Described template fastener in a conventional manner keeps in position, and described securing member connects extruder, template and water tank.Precentrum is held in position by the nose cone anchor bolt of normal setting, and described nose cone anchor bolt extends through circular open intracardiac in circular heating plate.Heater conductor and heater distribution extend through the single radial hole in the template, are used to be connected to the heater conductor connector that is associated with circular heating plate, so that provide electric power to template.Described heater distribution can invest maybe can be from described heater connector dismounting on the heater conductor connector.This embodiment of the present invention can use on one piece die plates, and on the removable center die plates.
In the second embodiment of the present invention, the entire inner diameter of template is cut to form in template is positioned at the center, columniform hollow region.The solenoid coil stratie is placed in the described hollow interior region.The solenoid coil stratie is flexible, and is designed to its outer surface and contacts with the inner surface of the hollow interior region of template, thereby flows directly in the template from the heat of heating element heater.Precentrum is by the fixing upstream side with the sealing hollow interior region of traditional set bolt; And the round insulation plug of the type that discloses in the U.S. Patent No. 6824371 sealing other end, perhaps by the similar insulation board sealing other end of the obturator of the downstream of the hollow that is formed for template, the content of described United States Patent (USP) is directly incorporated at this by reference, just as in this complete elaboration (be called " ' 371 patents hereinafter ").
Second embodiment has also used heater conductor or the heater distribution that extends through the single radial hole in the template, is used for powering to the coil resistance heating element heater.The heater distribution preferably forms with heating element heater.This embodiment of the present invention also can be used for one piece die plates, and removable center die plates.
Heating element heater is positioned to directly contact the center of template, can so that heat more effectively with more equably from the outside heat radiation in the center of template, thereby improve the temperature of template and extrusion cavities more effectively, and heat all extrusion cavities that become concentrically ringed pattern around the center arrangement of template more equably.With circular or cylindrical (cylindrical) heating element heater be positioned at template in this intracardiac layouts also avoided owing to use and add zone of heat liberation or provide cavity to be used for radially extending cartridge heater and need be in situation of some zone removal extrusion cavities of template.When the extrusion cavities that utilizes very little diameter (wire harness of wherein extruding and small particle typically have about 50 microns or littler maximum outside diameter) was made molecule, this center heated die was particularly advantageous.
Therefore; an object of the present invention is to provide a kind of template that is used for underwater pelletizer; described template has stratie; described stratie is associated with core between the downstream at upstream side with the mode of direct heat exchange contact and template; be used to make heat from the center of template to external radiation and be radiated the extrusion cavities that becomes concentric circles around the center oriented of template equably, so that whole extrusion cavities pattern is maintained at the Optimal Temperature near the condensate or other extrudate that are used to extrude fusing.
Another object of the present invention provides a kind of center heated die, wherein heating element heater is the form of circular resistance board heater, described circular resistance board heater be located at template in the intracardiac concave face, the precentrum of described concave face vicinity on the upstream side of template.
Further purpose of the present invention provides a kind of center heated die, wherein stratie is the form of solenoid coil, described solenoid coil is in the hollow template of inside between upstream side and downstream, and the inside of the hollow of template is by the precentrum sealing at upstream side, and by in the insulating plug in downstream or plate sealing, and insulating plug and the precentrum bolt that all is fixed keeps in position.
A further object of the present invention provides a kind of center heated die that is used for underwater pelletizer; wherein the centralized positioning of heating element heater provides effectively and uniform heating for the relevant range of extrusion cavities and template; so that with all extrusion cavities and maintain constant and even temperature, has the higher-quality particle of size more uniformly thereby produce by its condensate of fusing.
Also purpose of the present invention provides a kind of center heated die, and wherein heater conductor or heating distribution are connected to the center heating element heater, and extend through the single radial hole in template, so that be connected to the power supply in the template outside.
To become significantly subsequently, these purposes and other purpose are with advantage: the back is description more fully and the claimed structure and the details of operation with reference to the accompanying drawings; described accompanying drawing forms the part of described details, and wherein identical Reference numeral refers to identical part in the text.
Description of drawings
Fig. 1 is the vertical section schematic diagram of an embodiment of center heated die of the present invention, and wherein, circular heating plate is arranged in the recess of upstream side of template;
Fig. 2 is the exploded perspective picture group of the structure among Fig. 1, illustrates the relation of circular heating plate and template and pelletizer components;
Fig. 3 is the exploded perspective picture group of second embodiment of of the present invention, coil (coil) type center heated die plate form, and illustrates the combination of the member before assembling;
Fig. 4 is a partial cut-away perspective view, illustrates the combination of member of second embodiment of center heated die of the present invention; With
The exploded perspective picture group of similar among Fig. 5 and Fig. 3, the second embodiment of the present invention, but shown and the integrally formed heater distribution of cylindrical shape (cylindrical) coil resistance heating element heater.
The specific embodiment
Although only explain the preferred embodiments of the present invention in detail, it being understood that the scope of the details that the invention is not restricted to structure that it is set forth in the following description or in the drawings illustrated and layout.The present invention can be other embodiment, and can be put into practice or carry out in every way.And, in the process of describing preferred embodiment, for clarity sake will use special term.It being understood that each special term comprises all technical equivalents things of operating in a similar manner with the realization similar purpose.
With reference to accompanying drawing, Fig. 1 and 2 illustrates an embodiment that be associated with the member of underwater pelletizer, center heated die of the present invention, and this center heated die is generally with Reference numeral 10 expressions.Underwater pelletizer comprises the suction casing 12 from polymer extrusion machine (extruder) (not shown) of fusing.Suction casing 12 comprises the passage 14 of the condensate that is used to melt and other extrudates (hereinafter being generically and collectively referred to as " condensate "), and precentrum (nose cone) 16, and described precentrum 16 is directed to condensate the upstream side 18 of template 10.Template 10 comprises the one or more concentric rings of extrusion cavities 20, and described extrusion cavities 20 extends to the downstream face 21 of template 10 from the upstream face 18 of template 10.A plurality of blades (knife blade) assembly 22 is installed on the cutter hub that is driven in rotation (cutter hub) in the water tank (not shown) of underwater pelletizer; and the wire harness with solidifying of the polymeric cooling of extruding that will extrude cuts into particle; described particle is taken away by the cooling water of water tank; and the slurry as water and particle is discharged from, and described particle is dried by remove moisture in drying machine subsequently.
As illustrated in Fig. 1 and 2, the upstream face of template 10 or side 18 are cut so that annular recess or cavity 24 to be provided in extrusion cavities 20.Recess 24 is for circular structure and hold circular heating plate 26, described circular heating plate 26 is fixed on by securing member 28 in the bottom of recess 24, and described securing member 28 is screwed in the inner threaded boring 30 so that heating plate 26 is fixed on the inside of recess or cavity 24.Heating plate 26 comprises transverse connection 32, and described connector 32 is connected to electric lead 34, and described electric lead 34 stretches out and passes radial hole or passage 36 so that connect power supply or electric energy.Circular heating plate 26 is designed to be engaged in dexterously in the recess 24, and the bottom 27 of plate 26 cooperates on the bottom 25 that leans against recess 24 so that provide the abundant face between the surface 27 and 25 to contact with flushing.This abundant face contact has guaranteed to flow directly to template surface 25 and flow into template 10 thus from the heat of circular heating plate 26.
In case heating plate 26 has been fixed on the appropriate location and has been connected to electric lead 34, precentrum 16 just is positioned on the heating plate 26.Electric lead 34 can be connected on the connector 32 securely or be detachably connected on the connector 32.Shallow recess 38 in the base portion of precentrum 16 is engaged in the opening 24 of die face 18, so that with respect to die face 18 sealing precentrums 16.
Nose cone anchor bolt (anchor bolt) 40 extends through round insulation plug 42, and the insulating plug that discloses in ' 371 patent that for example exists, described insulating plug 42 are positioned in the recess 44 on the downstream of template 10.Set bolt 40 extends through centre bore 46 and the centre bore in heating plate 26 39 in template, and is screwed into by screw thread in the threaded bore hole 48 in the base portion of precentrum 16.Fig. 1 illustrates the assembled state of the member of center heated die 10.Circular adiabatic plug 42 and set bolt 40 are formed for the obturator (closure) of centre-drilling hole 46.The condensate of fusing can be extruded through extrusion cavities 20 then, and heating plate 26 is by keeping the temperature of the raising of template from recess or cavity 24 outside distribute heats at upstream die face 18 and the some place of the centre of downstream die face 21.Insulation board 42 is formed for the obturator (closure) in the downstream of template, and precentrum 16 is formed for the obturator of the upstream side of template, thereby the heat that is produced by heating plate 26 is transmitted on the upstream and the template between downstream face or the side of template.
The preferably traditional board heating apparatus of heating plate 26 of the present invention for example can be from Watlow Electric Manufacturing Company, the Model HT Foil Heater that St.Louis, Missouri buy.
Fig. 3,4 and 5 illustrates the second embodiment of the present invention, and template (totally by Reference numeral 60 expression) wherein comprises the cylindrical hollow inside 62 that extends to downstream or face 66 from upstream side or face 64.Template 60 comprises from upstream side 64 and extends to downstream 66 and be arranged to the extrusion cavities 68 of the circular pattern of one or more circles.The heater 70 of solenoid coil form is positioned at the cylindrical interior 62 of template 60, and comprises the connector 72 of contiguous precentrum 74.Precentrum 74 is fixed in position, and its base portion is in the inside of the circular pattern of extrusion cavities 68.Connector 72 is connected to electric lead 76, and described electric lead 76 stretches out and passes radial hole or passage 78, so that connect power supply or electric energy.
In the form of second embodiment shown in Figure 5, the upstream extremity of the stretch out electric lead that passes radial hole or passage 78 ' or heater distribution 76 ' and solenoid coil heater 70 ' forms.This whole structure has reduced cost and has improved the quality of solenoid coil heater assembly.
Aforementioned should being understood that only for principle of the present invention is described.Because those of ordinary skills can expect a lot of revise and changing, so aforementionedly will be not intended to limit the invention to accurate structure and operation shown and that describe.Therefore, all suitable modification and equivalents can be considered to fall within the scope of protection of the present invention.
Claims (17)
1. a template and heating component that is used for comminutor; comprise extrusion die; the entire inner diameter of described extrusion die is cut to form the cylindrical hollow inside that is positioned at the center in this template; described cylindrical hollow inside extends to the downstream face of described template through this template from the upstream face of described template; described extrusion die comprises a plurality of extrusion cavities; described extrusion cavities is arranged to around the concentric circles at the center of this template; the condensate of fusing flow to described downstream face and is extruded so that leave described downstream face as wire harness from described upstream face by described extrusion cavities; the cutting assembly that described wire harness is moved cuts into particle; coil heats element with general cylindrical shape; described heating element heater is positioned at the described cylindrical hollow inside of described template; described heating element heater is associated with the core between upstream face and downstream face of this template in the mode of direct heat exchange contact; so that heat from the center of this template to external radiation and be radiated the extrusion cavities that becomes concentric circles around the center oriented of template equably; thereby this extrusion cavities pattern is remained on the temperature of raising, and will maintain the state of fusing by the condensate of described extrusion cavities during by described extrusion cavities when condensate.
2. assembly according to claim 1, the described cylindrical hollow inside of wherein said template be at one end by precentrum sealing, and sealed by insulating plug at the other end, with heat is remained on described template in intracardiac, be used for towards described extrusion cavities to external radiation.
3. assembly according to claim 1, wherein said heating element heater is connected to heating wires, and described heating wires extends through the single radial passage in the described template, is used for electric energy is supplied to described heating element heater.
4. one kind is used for the template of comminutor extruding polymerization body wire harness under water; described template comprises a plurality of extrusion cavities; described a plurality of extrusion cavities is oriented the circular pattern of the periphery that centers on described template and extends to the downstream face of described template from the upstream face of described template
The entire inner diameter of described template is cut the cylindrical hollow inside that is positioned at the center with formation, described cylindrical hollow inside also from described upstream face through described template extend to described downstream face and
The coil heats element of general cylindrical shape, described heating element heater is positioned in described cylindrical hollow inside, described heating element heater is got in touch with the mode of direct heat exchange contact and the core between upstream face and downstream face of this template, so that heat from the center of this template to external radiation and be radiated the extrusion cavities that becomes described concentric circles around the center oriented of template equably, thereby in the process of described condensate, keep the state of described condensate in fusing by described extrusion cavities.
5. template according to claim 4, wherein said heating element heater is a stratie, described stratie is powered by heating wires, and described heating wires is connected to described heating element heater and extends to the power supply of described template outside by the single passage in the described template.
6. template according to claim 4, also comprise precentrum, described precentrum is formed for the obturator of described cylindrical hollow inside at the upstream face of template, and the obturator plate is formed for the described obturator that is positioned at the cylindrical hollow inside at center at the downstream face of template.
7. template according to claim 5, the end of wherein said heating wires and described solenoid coil forms.
8. one kind is used for the template and the heater assembly of comminutor extruding polymerization body wire harness under water, described template and heater assembly comprise extrusion die, described extrusion die has a plurality of extrusion cavities, described a plurality of extrusion cavities is oriented around the circular pattern of the periphery of described template, and extend to the downstream face of described template through this template from the upstream face of described template, the entire inner diameter of described template is cut the cylindrical hollow inside that is positioned at the center with formation, and described cylindrical hollow inside is positioned at the radially inner side of described extrusion cavities and also extends to described downstream face from described upstream face through described template; Solenoid coil heater, described solenoid coil heater are positioned at the described cylindrical hollow inside of described template; And heating wires, described heating wires is connected to described winding heater, and extends through the single passage in described template, so that provide electric power to described winding heater.
9. assembly according to claim 8, wherein said winding heater by forming obturator at described upstream face precentrum and remain in the described cylindrical hollow inside at the insulating plug that described downstream face forms obturator.
10. assembly according to claim 9, wherein said precentrum and described insulating plug are kept in position by nose cone anchor bolt, described nose cone anchor bolt is by centre bore and described winding heater in the described insulating plug, and is screwed in the described precentrum.
11. assembly according to claim 8, wherein, the end of described heating wires and described solenoid coil heater forms.
12. assembly according to claim 8, wherein, described single passage radially extends in described template.
13. heating component according to claim 1, the part of wherein said heating element heater contacts on the surface fully with the inner inner surface of described template cylindrical hollow, thereby flows directly to described template from the heat of described heating element heater.
14. assembly according to claim 8, the outer surface of wherein said solenoid coil heater contacts with the described inner surface of the cylindrical hollow inside at described center, thereby flows directly to described template from the heat of described winding heater.
15. assembly according to claim 1, wherein said heating element heater is a stratie.
16. assembly according to claim 1, wherein said coil heats element is flexible, so that being reduced by distortion, its external diameter make this element insert this cylindrical hollow inside, when described coil heats element discharges, described external diameter expands, thereby the outer surface of described coil heats element directly contacts with described template inner surface during assembling.
17. assembly according to claim 14, wherein said winding heater is a flexible member, its external diameter is reduced by distortion and makes this element insert this cylindrical hollow inside, when described coil heats element discharges, described external diameter expands, thereby the outer surface of described heating element heater directly contacts with described template inner surface during assembling.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US40186505A | 2005-01-25 | 2005-01-25 | |
| US11/401,865 | 2005-01-25 | ||
| PCT/US2006/002033 WO2006081140A1 (en) | 2005-01-25 | 2006-01-20 | Center heated die plate for underwater pelletizer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101107108A CN101107108A (en) | 2008-01-16 |
| CN101107108B true CN101107108B (en) | 2011-01-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2006800030138A Active CN101107108B (en) | 2005-01-25 | 2006-01-20 | Center heated die plate for underwater pelletizer |
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| Country | Link |
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| CN (1) | CN101107108B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5149145B2 (en) | 2008-12-26 | 2013-02-20 | 株式会社神戸製鋼所 | Dies for underwater cut granulator |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4071307A (en) * | 1974-12-16 | 1978-01-31 | Luigi Porro | Apparatus for making chips of thermoplastic material |
| CN2152652Y (en) * | 1993-05-11 | 1994-01-12 | 许维中 | Machine for making resin granules |
| DE19609065C1 (en) * | 1996-03-08 | 1997-01-23 | Berstorff Gmbh Masch Hermann | Plastic strand granulator has easily-fitted extrusion nozzle ring heater |
| US6474969B1 (en) * | 2000-10-27 | 2002-11-05 | Tds Technologies Inc. | Extrusion die and die assembly for underwater pelletizer |
| CN2562953Y (en) * | 2002-08-15 | 2003-07-30 | 陈友清 | Underwater pelleting device |
-
2006
- 2006-01-20 CN CN2006800030138A patent/CN101107108B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4071307A (en) * | 1974-12-16 | 1978-01-31 | Luigi Porro | Apparatus for making chips of thermoplastic material |
| CN2152652Y (en) * | 1993-05-11 | 1994-01-12 | 许维中 | Machine for making resin granules |
| DE19609065C1 (en) * | 1996-03-08 | 1997-01-23 | Berstorff Gmbh Masch Hermann | Plastic strand granulator has easily-fitted extrusion nozzle ring heater |
| US6474969B1 (en) * | 2000-10-27 | 2002-11-05 | Tds Technologies Inc. | Extrusion die and die assembly for underwater pelletizer |
| CN2562953Y (en) * | 2002-08-15 | 2003-07-30 | 陈友清 | Underwater pelleting device |
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| Publication number | Publication date |
|---|---|
| CN101107108A (en) | 2008-01-16 |
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