CA1306608C - Ring mold unit for shaping and tempering glass sheet - Google Patents
Ring mold unit for shaping and tempering glass sheetInfo
- Publication number
- CA1306608C CA1306608C CA000532276A CA532276A CA1306608C CA 1306608 C CA1306608 C CA 1306608C CA 000532276 A CA000532276 A CA 000532276A CA 532276 A CA532276 A CA 532276A CA 1306608 C CA1306608 C CA 1306608C
- Authority
- CA
- Canada
- Prior art keywords
- ring mold
- glass sheet
- shaping
- unit according
- cooling
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B27/00—Tempering or quenching glass products
- C03B27/04—Tempering or quenching glass products using gas
- C03B27/044—Tempering or quenching glass products using gas for flat or bent glass sheets being in a horizontal position
- C03B27/0442—Tempering or quenching glass products using gas for flat or bent glass sheets being in a horizontal position for bent glass sheets
- C03B27/0445—Tempering or quenching glass products using gas for flat or bent glass sheets being in a horizontal position for bent glass sheets the quench unit being adapted to the bend of the sheet
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B23/00—Re-forming shaped glass
- C03B23/02—Re-forming glass sheets
- C03B23/023—Re-forming glass sheets by bending
- C03B23/03—Re-forming glass sheets by bending by press-bending between shaping moulds
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B23/00—Re-forming shaped glass
- C03B23/02—Re-forming glass sheets
- C03B23/023—Re-forming glass sheets by bending
- C03B23/03—Re-forming glass sheets by bending by press-bending between shaping moulds
- C03B23/0302—Re-forming glass sheets by bending by press-bending between shaping moulds between opposing full-face shaping moulds
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B40/00—Preventing adhesion between glass and glass or between glass and the means used to shape it, hold it or support it
- C03B40/005—Fabrics, felts or loose covers
Abstract
ABSTRACT OF THE DISCLOSURE
A ring mold unit for shaping and tempering a glass sheet includes a shaping ring mold for bending a glass sheet heated to a temperature close to the softening point of glass, in association with upper and lower mold members, and a cooling ring mold for supporting the bent glass sheet while the glass sheet is being quenched and tempered by a cooling medium. The shaping ring mold has a thermally insulating member on its upper surface for supporting thereon, in surface-to-surface contact, the glass sheet inwardly of a peripheral edge thereof. The cooling ring mold is disposed outwardly of the shaping ring mold and having a shape complementary to the shape of the peripheral edge of the glass sheet for supporting the peripheral edge of the glass sheet. The cooling ring mold has recesses defined in the upper surface thereof, and is covered with a punched metal.
A ring mold unit for shaping and tempering a glass sheet includes a shaping ring mold for bending a glass sheet heated to a temperature close to the softening point of glass, in association with upper and lower mold members, and a cooling ring mold for supporting the bent glass sheet while the glass sheet is being quenched and tempered by a cooling medium. The shaping ring mold has a thermally insulating member on its upper surface for supporting thereon, in surface-to-surface contact, the glass sheet inwardly of a peripheral edge thereof. The cooling ring mold is disposed outwardly of the shaping ring mold and having a shape complementary to the shape of the peripheral edge of the glass sheet for supporting the peripheral edge of the glass sheet. The cooling ring mold has recesses defined in the upper surface thereof, and is covered with a punched metal.
Description
/`/S~- //4 -- Cf~
1 RING MOLD ~NIT FOR SHAPING AND TEMPERING GLASS SHEET
3 BACKGRO~ND OE THE INVENTION
4 1. Field of the Invention:
The present inven-tion relates generally to an 6 apparatus for shap.ing a curved tempered glass sheet for use 7 as a fr~nt windshield for automobiles, for example, and 8 more particularly to an improved ring mold unit for shaping 9 and tempering a glass sheet in such an apparatus.
1 RING MOLD ~NIT FOR SHAPING AND TEMPERING GLASS SHEET
3 BACKGRO~ND OE THE INVENTION
4 1. Field of the Invention:
The present inven-tion relates generally to an 6 apparatus for shap.ing a curved tempered glass sheet for use 7 as a fr~nt windshield for automobiles, for example, and 8 more particularly to an improved ring mold unit for shaping 9 and tempering a glass sheet in such an apparatus.
2. Description of the Relevant Art~
11 Systems for shaping glass sheets for use as 12 curved automotive window glass sheets, for example, operate 13 by heating a flat glass sheet in a heating furnace up to 14 the softening point of glass, Eeeding the heated glass sheet with a plurality of conveyor rollers in the heating 16 .Eurnace to a position in a shaping device, bending the 17 glass sheet with upper and lower mold members in the 18 shaping device, and then applying a suitable cooling medium 19 to the curved glass sheet to temper the same. It has been customary to use a ring mold for supporting the peripheral 21 edge of the glass sheet to bend the same with increased 22 - accuracy. When -the bent glass sheet is quenched in the 23 shaping device, the glass sheet is also supported by the 24 ring mold. With the lower surface of the glass sheet being supported by the ring mold at the time of quenching the 26 glass sheet, however, cooling air tends to remain 27 undischarged between the glass sheet and the ring mold j. . -- 1 `` 13~
1 without sufEiciently reaching the peripheral edge of the 2 glass sheet, thus failing to temper the glass edge.
11 Systems for shaping glass sheets for use as 12 curved automotive window glass sheets, for example, operate 13 by heating a flat glass sheet in a heating furnace up to 14 the softening point of glass, Eeeding the heated glass sheet with a plurality of conveyor rollers in the heating 16 .Eurnace to a position in a shaping device, bending the 17 glass sheet with upper and lower mold members in the 18 shaping device, and then applying a suitable cooling medium 19 to the curved glass sheet to temper the same. It has been customary to use a ring mold for supporting the peripheral 21 edge of the glass sheet to bend the same with increased 22 - accuracy. When -the bent glass sheet is quenched in the 23 shaping device, the glass sheet is also supported by the 24 ring mold. With the lower surface of the glass sheet being supported by the ring mold at the time of quenching the 26 glass sheet, however, cooling air tends to remain 27 undischarged between the glass sheet and the ring mold j. . -- 1 `` 13~
1 without sufEiciently reaching the peripheral edge of the 2 glass sheet, thus failing to temper the glass edge.
3 In view of the above shortcoming, there has been 4 proposed a ring mold having a number of recesses defined in the upper surface thereof or allowing cooling air to be 6 supplied in the vicinity oE the peripheral edge oE a glass 7 sheet to be quenched. The proposed ring mold, however, 8 raises another pro~lem in that the recessed sur~ace of the 9 ring mold is apt to leave depressions and projections on the lower surface of the shaped glass sheet.
11 Japanese Laid-Open Patent Publication No. 57/
12 145041 shows a ring mold unit comprising a cooling ring 13 mold having a number of recesses and a shaping ring mold 14 disposed outwardly of the cooling ring mold. After a glass sheet is bent by the shaping ring mold, cooling air is 16 applied against the glass sheet while it is being supported 17 by the cooling ring mold, thereby tempering the glass 1~ sheet. Since the shaping ring mold is constructed to 19 support only the peripheral edge of -the glass sheet, the surace area of the glass sheet which is supported by the 21 shaping ring mold is relatively small, and hence mechanical 22 distortions are liable to occur in the peripheral edge of 23 the glass sheet. Moreover, the cooling mold leaves 24 projections and depressions on the area of the glass sheet which is held by the cooling ring mold, and the peripheral 26 edge of the glass sheet which is supported by the shaping 27 ring mold cannot be well tempered inasmuch as the glass D.~ 2 6~
edge is not sufficiently cooled.
To eliminate the above drawbacks, a glass sheet shaping ring mold has been proposed having a web of metallic woven cloth made of stainless steel fibers placed on the recessed surface of the ring mold which is disposed for contact wlth a glass sheet, as disclosed in Japanese Laid-Open Patent Publication No. 59/
149934. The metallic woven cloth prevents the glass sheet from being held in direct contact with the ring mold that is held ak a low temperature, and also prevents depressions and projections from being left on the glass sheet~ However, cooling air is not well discharged from between the glass sheet and the ring mold, so that the glass sheet will not be tempered as well at the peripheral edge as at the other area thereof.
Therefore, the present invention provides a ring mold unit for shaping and tempering a glass sheet, the ring mold unit being capable of producing a glass sheet which is free of distor-tions tending to cause optical re*lections and is of high shaping accuracy.
The present invention al50 provides a ring mold unit for shaping and tempering a glass sheet uniformly in its entirety.
The present invention agaln provides a ring mold unit for shaping and tempering a glass sheet, the ring mold unit hav-ing a ring mold which can easlly be changed in shape.
The present invention also provides a ring mold unit for shaping and tempering a glass sheet ~ithout leaving depres-sions and pro~ections on the surface of the glass sheet.
The present invention further provides a ring mold unit for shaping and tempering a glass sheet, the ring mold unit allow~ng cooling air to be well dlscharged~
~3~
According to the present invention, there is provided a ring mold unit for shaping and tempering a glass sheet, compris-ing a shaplng ring mold for bending a glass sheet heated to a temperature close to the softening point of glass, in association with upper and lower mold members, and a cooling ring mold for supporting the bent glass sheet while the glass she~t is being quenched and tempered by a cooling medium, the shaping ring mold having a thermally insulating member on an upper surface thereof for supporting thereon, in surface-to-surface contact, the glass sheet inwardly of a peripheral edge thereof, the cooling ring mold being disposed outwardly of the shaping ring mold and having a shape complementary to the shape of the peripheral edge of the glas~ sheet for supporting the peripheral edge of the glass sheet.
The shaping ring mold preferably comprises a lower layer of metal, an intermediate layer of resin flxed to an upper surface of the lower layer, and an upper layer of thermally insu-lating felt bonded to an upper surface of the intermediate layer and constituting the thermally insulating member.
The cooling ring mold preferably has a plurality of recesses deflned in an upper surface thereof suitably spaced at regular intervals. At least an upper surface of the cooling ring mold ls desirably covered with a punched metal strip having a plurality of openings.
In a particular embodiment of he pre~ent invention there is provided a rlng mold unit for shaplng and tempering a gla~s sheet in a glass sheet shaping system havlng a supporting frame comprising a base plate, a plurallty of posts erected on said baæe plate, and a top plate fixed to and supportd on said posts, a first lifting/lowering unit mounted on said top plate, an upper mold member vertically movable by said first lifting/
lowering unlt, a second lifting~lowering unit mounted on said base plate, and a lower mold member vertically movable by sald .~ .
~3~
second lifting/lowering unit, said ring mold unit being mounted on said base plate, so that a glass sheet heat~d to a temperature close to the soft~ning point of glass can be bent by said upper and lower mold members and quenched and tempered by a cooling medium applied from said upper and lower mold members, said ring mold unit comprising third and fourth lifting/lowering units mounted on said base plate; a shaping ring mold vertically mov-able by said third lifting/lowering unit for bending the glass sheet heated to the temperature close to the softening point of lo glass, in association with said upper and lower mold members; and a cooling rlng mold vertically movable by said fourth lifting/
lowering unit for supporting the bent glass sheet while the glass sheet is being quenched and tempered by the cooling medium, said shaping ring mold having a thermally insulating member on an upper surface thereof for supporting,thereon, in surface-to-sur-face contact, said glass sheet inwardly of a peripheral edge thereof; and said cooling riny mold being disposed outwardly of said shaping ring mold and having a shape complementary to the shape of the peripheral edge of said glass sheet for supporting 2~ said peripheral edge of the glass sheet.
In another embodiment thereof the present invention provides a ring mold unit for shaping a glass sheet by bending the glass sheet heated to a temperature close to the softening point of glass, in association with a mold, while supporting a lower marginal edge of the glass sheetr and also by quenching and tempering the bent glass sheet while supporting the glass sheet, said ring mold unit having a number of recesses defined in an upper surface thereof and ~overed with a punched metal strip hav-ing a number of openlngs.
~ dvantages of the present invention will become appar-ent from the followin~ detalled descrlption of prRferred embodi-ments thereof, when read in conjunction with the accompanying drawings, in which:-~ ~$:
..
Fig. 1 is a schematic front elevational view of an ap-paratus for shaping a glass sheet, employing a ring mold unit for shaping and tempering a glass sheet according to the present invention;
Fig. 2 is a fragmentary perspective view of the ring mold unit shown in Fig. 1 and a lower mold member of a shaping mold;
Fig. 3 is an enlarg~d cross-sectional view of a shaping ring mold of the ring mold unit;
Fig. ~ is an enlarged fragmentary plan view of a cool-ing ring mold o~ the ring mold unit;
Fig. 5 is a fragmentary side elevational vlew, partly in cross-section, of the cooling ring mold of Fig. 4;
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~, `~' i3~
1 FIG. 6 is a view similar to FIG. 3, showing a 2 punched or apertured metal strip fitted over the cooling 3 ring mold of FIG. 4;
4 FIG. 7 is an enlarged fragmentary plan view o the punched metal strip shown in FIG. 6;
FIG. 8 is a ragementary side elevational view of 7 the punched metal strip prior to being pressed by rolls;
8 FIG. 9 is a fragementary side elevational view of 9 the punched metal strip after being roll-pressed;
FIGS. 10 and 11 are Eregmentary perspective views 11 of cooling ring molds according to other embodiments of the 12 present invention;
13 FIGS. 12 through lS are sch~matic front 14 elevational views showing progressive steps of forming a glass sheet; and 16 FIG. 16 is a perspective view of a shaping/
17 cooling ring mold covered with a punched metal strip.
19 As shown in FIG. 1, a glass sheet shaping system comprises a heating furnace 1 for heating a glass sheet G, 21 which has been conveyed from a loading station tnot shown), 22 to a temperature close to the softening point oE glass, and 23 a shaping/cooling device 5 for bending and quenching the 24 glass sheet G delivered by a plurality of conveyor rollers 3 in the heating furface 1 aEter the glass sheet G has been 26 heated. The shaping/cooling device 5 has a supporting 27 rame 10 which supports a mold generally denoted by the }6~
1 reference character M, the mold M having upper and lower 2 mold members 3~, 38. The supporting frame 10 comprises a 3 base plate 12, a plurality of posts 14 erected on the base 4 plate 12, and a top plate 16 fixed to and supported on th~
posts 14. A lifting/lowering unit 20 is disposed on the 6 top plate 16 for liEting and lowering the upper mold member 7 30. The upper mold member 30 has a number o~ air jet holes 8 (not shown) defined in its shaping surEace, i.e., the lower 9 surface, for ejecting cooling air. The upper mold member 30 is of a hollow construction with its interior space 11 communicating with a source of pressuri~ed air (not shown).
12 Another lifting/lowering unit 35 is mounted on the base 13 plate 12 for lifting and lowering the lower mold member 38.
14 As better illustrated in FIG. 2, the lower mold member 38 has a number of air jet holes 40 defined in its upper 16 surface for ejecting cooling air, and also has a number of 17 elongate recesses or slots 42 in its upper surEace for 18 accommodating respective rollers 44 when the lower mold l9 member 38 is elevated.
As shown in FIGS. 1 and 2, a ring mold unit R is 21 disposed around or along the sides of the lower mold member 22 38. The ring mold unit R has an inner shaping ring mold S0 23 postioned closely to the lower mold member 38, and a 24 cooling ring mold 55 disposed outwardly of the shaping ring mold 50. The shaping ring mold 50 and the cooling ring 26 mol~ 55 can independently be lifted and lowered by 27 respective lifting/lowering units 60, 62 diposed on a ~3~6~
1 support table 57 mounted on the base plate 12.
2 As shown in FIG. 3, the shaping ring mold 50 is 3 of a three-layer structure including a lower layer 65 made 4 of metal such as stainless steel, an intermediate layer 67 of resin fixed to the upper surface of the lower layer 65, 6 and an upper layer 69 made of a thermally insulating 7 material such as thermally insulating felt bonded to the 8 upper surface of the intermediate layer 67. The inter-9 mediate layer ~7 serves to reduce a thermal effect which the lower layer 65 kept at a low temperature would have on 11 the glass sheet G. The shaping ring mold 50 can easily be 12 changed or modified in shape simp].y by cutting oE~ the 13 intermediate layer 67. The felt of the upper layer 69 14 prevents the glass sheet G from being thermally and mechanically distorted, and also prevents depressions and 16 projections from being left on the surface of the glass 17 sheet G, when the glass sheet G is shaped.
18 As illustrated in FIG. 2, the cooling ring mold 19 55 has a shape complementary to the outer peripheral edge of the glass sheet G. As shown in detail in FIGS. 4 and 5, 21 the cooling ring mold 55 has a plurality of recesses 70 22 de~ined at regular intervals in the upper surface thereof 23 for allowing cooling air to be well discharged through the 24 recesses 70. The cooling ring mold 55 also has vertical through holes 72 defined in the respective recesses 70 for 26 assisting cooling air in getting discharged.
27 In an embodiment shown in FIG. 6, a punched or ~3~6&~
. .
1 apertured metal strip 75, preferably made of stainless 2 steel, is fitted over the entire surface oE the cooling 3 ring mold 55. ~s illustrated in FIG. 7, the punched metal 4 strip 75 has a number of punched-out lozenge-shaped openings 77. If the size of each of the openings 77 were 6 too large, the glass sheet G would tend to be brought into 7 direct contact with the cooling ring mold 55. If the 8 openings 77 were too small, then they would hinder the 9 passage of cooling air as it is discharged. PreEerably, the punched metal strip 76 has a thickness ranging from 0.1 11 to 0.5 mm, and the ratio of the ~rea of the openings 77 to 12 the entire area of the punched metal strip 75 is about 40 %
13 or more. Each oE the lozenge-shaped openings 77 should 14 preferably have a longer diagonal line of a length Sl ranging from 0.5 to 5.0 mm and a shorter diagonal line of a 16 length S2 ranging Erom 0.4 to 2.0 mm~ with the grid bars 17 between adjacent openings having a width S3 ranging from 18 about 0.1 to 1.5 mm. When a metal blank is punched to form 19 the punched metal strip 75, the punched metal strip 75 has projections and depresssions 79 on its surfaces as shown in 21 FIG. 8, and such an irregular surface would damage a glass 22 sheet in contact therewith. After the punching, the 23 punched metal strip 75 is pressed by rolls to flatten its 24 surfaces as shown in FIG. 9.
FIGS. 10 and 11 respectively show cooling ring 26 molds according to other embodiments of the present 27 inven-tion. In the embodiment shown in FIG. 10, metal ~3~
1 piec~s ~2 positioned at spaced intervals project from the 2 inner side surEace o~ a cooling ring mold ~0. Each of the 3 metal pieces ~2 has one or more (two in the illustrated 4 embodiment) holes ~4 defined therein for discharging cooling air therethrough, In the embodiment o~ FIG. 11, 6 substantially ~-shaped metal pieces 88 spaced at intervals 7 are joined to the inner side surface of a cooling ring mold 8 8~. Each of the U-shaped metal pieces 88 deEines an inner 9 space 89 for discharging cooling air therethrough. It can easily be understood by those skilled in the art that the 11 air-discharging spaces or holes 89 may be o any of various 12 difEerent shapes.
13 Operation of the glass sheet shaping system will 14 be described below. As shown in FIG. 12, a glass sheet G
that has been heated to a temperature close to the glass 16 softening point is delivered by the conveyor rollers 3 onto 17 the rollers 44 in the shaping device 5. At this time, the 18 upper mold member 30 is in a liEted position, and the lower 19 mold member 38 is in a lowered position. The shaping and cooling ring molds 50, 55 are positioned at a level lower 21 than the rollers 44. Then, as illustrated in FIG. 13, the 22 shaping ring mold 50 is elevated to receive the glass sheet 23 G thereon. At this time, the cooling ring mold 55 is 24 postiioned below the shaping ring mold 50. Instead of 2S raising the shaping ring mold 50 to receive the glass sheet 26 G, the rollers ~4 may be lowered to place the glass sheet G
27 on the shaping ring mold 50 which is now held in surEace-~3~
. . ~
1 to-surEace contact with the glass sheet G. ThereaEter, the 2 liEting/lowering units 20, 35 are operated to lower the 3 upper mold member 30 and lift the lower mold member 38~
4 The glass sheet G is now bent by and between the upper and lower mold members 30, 38 while being supported by the 6 shaping ring mold 50. The roller 44 is now fully 7 accommodated in the respective recesses 42 of the lower 8 rnold member 38.
9 After the glass sheet G has been bent, the lifting/loweing units 20, 35 are actuated to elevate the 11 upper mold member 30 and lower the lower mold member 38.
12 The lifting/lowering units 60, 62 are also indepenently 13 operated to lower the shaping ring mold 50 and raise the 14 cooling ring mold 55 for thereby transferring the glass sheet G from the shaping ring mold 50 to the cooling ring 16 mold 55. The peripheral edge oE the glass sheet G is now 17 supported by the cooling ring mold 55. Then, cooling air 18 is ejected Erom the air jet holes of the upper mold member 19 30 and the air jet holes 40 of the lower mold member 38 toward the upper and lower surEaces of the glass sheet G, 21 as shown in FIG. 15, thereby tempering the glass sheet G.
22 Thereafter, the tempered curved glass sheet G is delivered 23 by conveyor rollers 90 tFIG. 1) to a next processing 24 station.
FIG. 16 shows a shaping/cooling ring mold 92 26` which serves as both shaping and cooling ring molds, the 27 shaping/cooling ring ~old 92 having a series of recesses 94 : : .
~3~
defined in its upper surface at regular intervals. The shaping/cooling ring mold 92 is entirely covered with a punched metal strip 96 which is identical to the punched metal strip 75 shown in FIG. 7, so that cooling air c~n well be discharged and the shaping/cooling ring 92 is held out of direct contact with a glass sheet to prevent depressions and projections from being left on the glass surface. It the size of each of the lozenge-shaped openings defined in the punched metal strip 96 were too large, the glass sheet would tend to contact the shaping/cooling ring mold 92, and if the lozenge-shaped openings were too small, they would not discharge cooling air well. Preferably, like the previous embodiment, the punched metal strip 96 has a thickness ranging from 0.1 to 0.5 mm, and the ratio of the area o~ the openings to the entire area of the punched metal strip 76 is about 40% or more. Each of the lozenge-shaped openings should preferably have a longer diagonal line of a length ranging from 0.5 to 5.0 mm and a shorter diagonal line of a length ranging from 0.4 to 2.0 mm, with the grid bars between adjacent openings having a width ranging from about 0.1 to 1.5 mm. After the punched metal strip 96 has been formed, it is pressed by rolls to flatten its surfaces. The shaping/cooling ring mold 92 operates in the same manner as both of the shaping and cooling ring molds 50, 55 of the previous embodiment.
-yl
11 Japanese Laid-Open Patent Publication No. 57/
12 145041 shows a ring mold unit comprising a cooling ring 13 mold having a number of recesses and a shaping ring mold 14 disposed outwardly of the cooling ring mold. After a glass sheet is bent by the shaping ring mold, cooling air is 16 applied against the glass sheet while it is being supported 17 by the cooling ring mold, thereby tempering the glass 1~ sheet. Since the shaping ring mold is constructed to 19 support only the peripheral edge of -the glass sheet, the surace area of the glass sheet which is supported by the 21 shaping ring mold is relatively small, and hence mechanical 22 distortions are liable to occur in the peripheral edge of 23 the glass sheet. Moreover, the cooling mold leaves 24 projections and depressions on the area of the glass sheet which is held by the cooling ring mold, and the peripheral 26 edge of the glass sheet which is supported by the shaping 27 ring mold cannot be well tempered inasmuch as the glass D.~ 2 6~
edge is not sufficiently cooled.
To eliminate the above drawbacks, a glass sheet shaping ring mold has been proposed having a web of metallic woven cloth made of stainless steel fibers placed on the recessed surface of the ring mold which is disposed for contact wlth a glass sheet, as disclosed in Japanese Laid-Open Patent Publication No. 59/
149934. The metallic woven cloth prevents the glass sheet from being held in direct contact with the ring mold that is held ak a low temperature, and also prevents depressions and projections from being left on the glass sheet~ However, cooling air is not well discharged from between the glass sheet and the ring mold, so that the glass sheet will not be tempered as well at the peripheral edge as at the other area thereof.
Therefore, the present invention provides a ring mold unit for shaping and tempering a glass sheet, the ring mold unit being capable of producing a glass sheet which is free of distor-tions tending to cause optical re*lections and is of high shaping accuracy.
The present invention al50 provides a ring mold unit for shaping and tempering a glass sheet uniformly in its entirety.
The present invention agaln provides a ring mold unit for shaping and tempering a glass sheet, the ring mold unit hav-ing a ring mold which can easlly be changed in shape.
The present invention also provides a ring mold unit for shaping and tempering a glass sheet ~ithout leaving depres-sions and pro~ections on the surface of the glass sheet.
The present invention further provides a ring mold unit for shaping and tempering a glass sheet, the ring mold unit allow~ng cooling air to be well dlscharged~
~3~
According to the present invention, there is provided a ring mold unit for shaping and tempering a glass sheet, compris-ing a shaplng ring mold for bending a glass sheet heated to a temperature close to the softening point of glass, in association with upper and lower mold members, and a cooling ring mold for supporting the bent glass sheet while the glass she~t is being quenched and tempered by a cooling medium, the shaping ring mold having a thermally insulating member on an upper surface thereof for supporting thereon, in surface-to-surface contact, the glass sheet inwardly of a peripheral edge thereof, the cooling ring mold being disposed outwardly of the shaping ring mold and having a shape complementary to the shape of the peripheral edge of the glas~ sheet for supporting the peripheral edge of the glass sheet.
The shaping ring mold preferably comprises a lower layer of metal, an intermediate layer of resin flxed to an upper surface of the lower layer, and an upper layer of thermally insu-lating felt bonded to an upper surface of the intermediate layer and constituting the thermally insulating member.
The cooling ring mold preferably has a plurality of recesses deflned in an upper surface thereof suitably spaced at regular intervals. At least an upper surface of the cooling ring mold ls desirably covered with a punched metal strip having a plurality of openings.
In a particular embodiment of he pre~ent invention there is provided a rlng mold unit for shaplng and tempering a gla~s sheet in a glass sheet shaping system havlng a supporting frame comprising a base plate, a plurallty of posts erected on said baæe plate, and a top plate fixed to and supportd on said posts, a first lifting/lowering unit mounted on said top plate, an upper mold member vertically movable by said first lifting/
lowering unlt, a second lifting~lowering unit mounted on said base plate, and a lower mold member vertically movable by sald .~ .
~3~
second lifting/lowering unit, said ring mold unit being mounted on said base plate, so that a glass sheet heat~d to a temperature close to the soft~ning point of glass can be bent by said upper and lower mold members and quenched and tempered by a cooling medium applied from said upper and lower mold members, said ring mold unit comprising third and fourth lifting/lowering units mounted on said base plate; a shaping ring mold vertically mov-able by said third lifting/lowering unit for bending the glass sheet heated to the temperature close to the softening point of lo glass, in association with said upper and lower mold members; and a cooling rlng mold vertically movable by said fourth lifting/
lowering unit for supporting the bent glass sheet while the glass sheet is being quenched and tempered by the cooling medium, said shaping ring mold having a thermally insulating member on an upper surface thereof for supporting,thereon, in surface-to-sur-face contact, said glass sheet inwardly of a peripheral edge thereof; and said cooling riny mold being disposed outwardly of said shaping ring mold and having a shape complementary to the shape of the peripheral edge of said glass sheet for supporting 2~ said peripheral edge of the glass sheet.
In another embodiment thereof the present invention provides a ring mold unit for shaping a glass sheet by bending the glass sheet heated to a temperature close to the softening point of glass, in association with a mold, while supporting a lower marginal edge of the glass sheetr and also by quenching and tempering the bent glass sheet while supporting the glass sheet, said ring mold unit having a number of recesses defined in an upper surface thereof and ~overed with a punched metal strip hav-ing a number of openlngs.
~ dvantages of the present invention will become appar-ent from the followin~ detalled descrlption of prRferred embodi-ments thereof, when read in conjunction with the accompanying drawings, in which:-~ ~$:
..
Fig. 1 is a schematic front elevational view of an ap-paratus for shaping a glass sheet, employing a ring mold unit for shaping and tempering a glass sheet according to the present invention;
Fig. 2 is a fragmentary perspective view of the ring mold unit shown in Fig. 1 and a lower mold member of a shaping mold;
Fig. 3 is an enlarg~d cross-sectional view of a shaping ring mold of the ring mold unit;
Fig. ~ is an enlarged fragmentary plan view of a cool-ing ring mold o~ the ring mold unit;
Fig. 5 is a fragmentary side elevational vlew, partly in cross-section, of the cooling ring mold of Fig. 4;
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~, `~' i3~
1 FIG. 6 is a view similar to FIG. 3, showing a 2 punched or apertured metal strip fitted over the cooling 3 ring mold of FIG. 4;
4 FIG. 7 is an enlarged fragmentary plan view o the punched metal strip shown in FIG. 6;
FIG. 8 is a ragementary side elevational view of 7 the punched metal strip prior to being pressed by rolls;
8 FIG. 9 is a fragementary side elevational view of 9 the punched metal strip after being roll-pressed;
FIGS. 10 and 11 are Eregmentary perspective views 11 of cooling ring molds according to other embodiments of the 12 present invention;
13 FIGS. 12 through lS are sch~matic front 14 elevational views showing progressive steps of forming a glass sheet; and 16 FIG. 16 is a perspective view of a shaping/
17 cooling ring mold covered with a punched metal strip.
19 As shown in FIG. 1, a glass sheet shaping system comprises a heating furnace 1 for heating a glass sheet G, 21 which has been conveyed from a loading station tnot shown), 22 to a temperature close to the softening point oE glass, and 23 a shaping/cooling device 5 for bending and quenching the 24 glass sheet G delivered by a plurality of conveyor rollers 3 in the heating furface 1 aEter the glass sheet G has been 26 heated. The shaping/cooling device 5 has a supporting 27 rame 10 which supports a mold generally denoted by the }6~
1 reference character M, the mold M having upper and lower 2 mold members 3~, 38. The supporting frame 10 comprises a 3 base plate 12, a plurality of posts 14 erected on the base 4 plate 12, and a top plate 16 fixed to and supported on th~
posts 14. A lifting/lowering unit 20 is disposed on the 6 top plate 16 for liEting and lowering the upper mold member 7 30. The upper mold member 30 has a number o~ air jet holes 8 (not shown) defined in its shaping surEace, i.e., the lower 9 surface, for ejecting cooling air. The upper mold member 30 is of a hollow construction with its interior space 11 communicating with a source of pressuri~ed air (not shown).
12 Another lifting/lowering unit 35 is mounted on the base 13 plate 12 for lifting and lowering the lower mold member 38.
14 As better illustrated in FIG. 2, the lower mold member 38 has a number of air jet holes 40 defined in its upper 16 surface for ejecting cooling air, and also has a number of 17 elongate recesses or slots 42 in its upper surEace for 18 accommodating respective rollers 44 when the lower mold l9 member 38 is elevated.
As shown in FIGS. 1 and 2, a ring mold unit R is 21 disposed around or along the sides of the lower mold member 22 38. The ring mold unit R has an inner shaping ring mold S0 23 postioned closely to the lower mold member 38, and a 24 cooling ring mold 55 disposed outwardly of the shaping ring mold 50. The shaping ring mold 50 and the cooling ring 26 mol~ 55 can independently be lifted and lowered by 27 respective lifting/lowering units 60, 62 diposed on a ~3~6~
1 support table 57 mounted on the base plate 12.
2 As shown in FIG. 3, the shaping ring mold 50 is 3 of a three-layer structure including a lower layer 65 made 4 of metal such as stainless steel, an intermediate layer 67 of resin fixed to the upper surface of the lower layer 65, 6 and an upper layer 69 made of a thermally insulating 7 material such as thermally insulating felt bonded to the 8 upper surface of the intermediate layer 67. The inter-9 mediate layer ~7 serves to reduce a thermal effect which the lower layer 65 kept at a low temperature would have on 11 the glass sheet G. The shaping ring mold 50 can easily be 12 changed or modified in shape simp].y by cutting oE~ the 13 intermediate layer 67. The felt of the upper layer 69 14 prevents the glass sheet G from being thermally and mechanically distorted, and also prevents depressions and 16 projections from being left on the surface of the glass 17 sheet G, when the glass sheet G is shaped.
18 As illustrated in FIG. 2, the cooling ring mold 19 55 has a shape complementary to the outer peripheral edge of the glass sheet G. As shown in detail in FIGS. 4 and 5, 21 the cooling ring mold 55 has a plurality of recesses 70 22 de~ined at regular intervals in the upper surface thereof 23 for allowing cooling air to be well discharged through the 24 recesses 70. The cooling ring mold 55 also has vertical through holes 72 defined in the respective recesses 70 for 26 assisting cooling air in getting discharged.
27 In an embodiment shown in FIG. 6, a punched or ~3~6&~
. .
1 apertured metal strip 75, preferably made of stainless 2 steel, is fitted over the entire surface oE the cooling 3 ring mold 55. ~s illustrated in FIG. 7, the punched metal 4 strip 75 has a number of punched-out lozenge-shaped openings 77. If the size of each of the openings 77 were 6 too large, the glass sheet G would tend to be brought into 7 direct contact with the cooling ring mold 55. If the 8 openings 77 were too small, then they would hinder the 9 passage of cooling air as it is discharged. PreEerably, the punched metal strip 76 has a thickness ranging from 0.1 11 to 0.5 mm, and the ratio of the ~rea of the openings 77 to 12 the entire area of the punched metal strip 75 is about 40 %
13 or more. Each oE the lozenge-shaped openings 77 should 14 preferably have a longer diagonal line of a length Sl ranging from 0.5 to 5.0 mm and a shorter diagonal line of a 16 length S2 ranging Erom 0.4 to 2.0 mm~ with the grid bars 17 between adjacent openings having a width S3 ranging from 18 about 0.1 to 1.5 mm. When a metal blank is punched to form 19 the punched metal strip 75, the punched metal strip 75 has projections and depresssions 79 on its surfaces as shown in 21 FIG. 8, and such an irregular surface would damage a glass 22 sheet in contact therewith. After the punching, the 23 punched metal strip 75 is pressed by rolls to flatten its 24 surfaces as shown in FIG. 9.
FIGS. 10 and 11 respectively show cooling ring 26 molds according to other embodiments of the present 27 inven-tion. In the embodiment shown in FIG. 10, metal ~3~
1 piec~s ~2 positioned at spaced intervals project from the 2 inner side surEace o~ a cooling ring mold ~0. Each of the 3 metal pieces ~2 has one or more (two in the illustrated 4 embodiment) holes ~4 defined therein for discharging cooling air therethrough, In the embodiment o~ FIG. 11, 6 substantially ~-shaped metal pieces 88 spaced at intervals 7 are joined to the inner side surface of a cooling ring mold 8 8~. Each of the U-shaped metal pieces 88 deEines an inner 9 space 89 for discharging cooling air therethrough. It can easily be understood by those skilled in the art that the 11 air-discharging spaces or holes 89 may be o any of various 12 difEerent shapes.
13 Operation of the glass sheet shaping system will 14 be described below. As shown in FIG. 12, a glass sheet G
that has been heated to a temperature close to the glass 16 softening point is delivered by the conveyor rollers 3 onto 17 the rollers 44 in the shaping device 5. At this time, the 18 upper mold member 30 is in a liEted position, and the lower 19 mold member 38 is in a lowered position. The shaping and cooling ring molds 50, 55 are positioned at a level lower 21 than the rollers 44. Then, as illustrated in FIG. 13, the 22 shaping ring mold 50 is elevated to receive the glass sheet 23 G thereon. At this time, the cooling ring mold 55 is 24 postiioned below the shaping ring mold 50. Instead of 2S raising the shaping ring mold 50 to receive the glass sheet 26 G, the rollers ~4 may be lowered to place the glass sheet G
27 on the shaping ring mold 50 which is now held in surEace-~3~
. . ~
1 to-surEace contact with the glass sheet G. ThereaEter, the 2 liEting/lowering units 20, 35 are operated to lower the 3 upper mold member 30 and lift the lower mold member 38~
4 The glass sheet G is now bent by and between the upper and lower mold members 30, 38 while being supported by the 6 shaping ring mold 50. The roller 44 is now fully 7 accommodated in the respective recesses 42 of the lower 8 rnold member 38.
9 After the glass sheet G has been bent, the lifting/loweing units 20, 35 are actuated to elevate the 11 upper mold member 30 and lower the lower mold member 38.
12 The lifting/lowering units 60, 62 are also indepenently 13 operated to lower the shaping ring mold 50 and raise the 14 cooling ring mold 55 for thereby transferring the glass sheet G from the shaping ring mold 50 to the cooling ring 16 mold 55. The peripheral edge oE the glass sheet G is now 17 supported by the cooling ring mold 55. Then, cooling air 18 is ejected Erom the air jet holes of the upper mold member 19 30 and the air jet holes 40 of the lower mold member 38 toward the upper and lower surEaces of the glass sheet G, 21 as shown in FIG. 15, thereby tempering the glass sheet G.
22 Thereafter, the tempered curved glass sheet G is delivered 23 by conveyor rollers 90 tFIG. 1) to a next processing 24 station.
FIG. 16 shows a shaping/cooling ring mold 92 26` which serves as both shaping and cooling ring molds, the 27 shaping/cooling ring ~old 92 having a series of recesses 94 : : .
~3~
defined in its upper surface at regular intervals. The shaping/cooling ring mold 92 is entirely covered with a punched metal strip 96 which is identical to the punched metal strip 75 shown in FIG. 7, so that cooling air c~n well be discharged and the shaping/cooling ring 92 is held out of direct contact with a glass sheet to prevent depressions and projections from being left on the glass surface. It the size of each of the lozenge-shaped openings defined in the punched metal strip 96 were too large, the glass sheet would tend to contact the shaping/cooling ring mold 92, and if the lozenge-shaped openings were too small, they would not discharge cooling air well. Preferably, like the previous embodiment, the punched metal strip 96 has a thickness ranging from 0.1 to 0.5 mm, and the ratio of the area o~ the openings to the entire area of the punched metal strip 76 is about 40% or more. Each of the lozenge-shaped openings should preferably have a longer diagonal line of a length ranging from 0.5 to 5.0 mm and a shorter diagonal line of a length ranging from 0.4 to 2.0 mm, with the grid bars between adjacent openings having a width ranging from about 0.1 to 1.5 mm. After the punched metal strip 96 has been formed, it is pressed by rolls to flatten its surfaces. The shaping/cooling ring mold 92 operates in the same manner as both of the shaping and cooling ring molds 50, 55 of the previous embodiment.
-yl
Claims (22)
1. A ring mold unit for shaping and tempering a glass sheet, comprising:
a shaping ring mold for bending a glass sheet heated to a temperature close to the softening point of glass, in association with upper and lower mold members;
a cooling ring mold for supporting the bent glass sheet while the glass sheet is being quenched and tempered by a cooling medium;
said shaping ring mold having a thermally insulating member on an upper surface thereof for supporting thereon, in surface-to-surface contact, said glass sheet inwardly of a peripheral edge thereof; and said cooling ring mold being disposed outwardly of said shaping ring mold and having a shape complementary to the shape of the peripheral edge of said glass sheet for supporting said peripheral edge of the glass sheet.
a shaping ring mold for bending a glass sheet heated to a temperature close to the softening point of glass, in association with upper and lower mold members;
a cooling ring mold for supporting the bent glass sheet while the glass sheet is being quenched and tempered by a cooling medium;
said shaping ring mold having a thermally insulating member on an upper surface thereof for supporting thereon, in surface-to-surface contact, said glass sheet inwardly of a peripheral edge thereof; and said cooling ring mold being disposed outwardly of said shaping ring mold and having a shape complementary to the shape of the peripheral edge of said glass sheet for supporting said peripheral edge of the glass sheet.
2. A ring mold unit according to claim 1, wherein said shaping ring mold comprises a lower layer of metal, an intermediate layer of resin fixed to an upper surface of said lower layer, and an upper layer of thermally insulating felt bonded to an upper surface of said inter-mediate layer and constituting said thermally insulating member.
3. A ring mold unit according to claim 1, wherein said cooling ring mold has a number of recesses defined in an upper surface thereof.
4. A ring mold unit according to claim 3, wherein said recesses of the cooling ring mold are spaced at regular intervals.
5. A ring mold unit according to claim 3, wherein said cooling ring mold has a number of through holes defined respectively in said recesses.
6. A ring mold unit according to claim 3, further including a punched metal strip covering said cooling ring mold, said punched metal strip having a number of openings.
7. A ring mold unit according to claim 6, wherein said punched metal strip is roll-pressed.
8. A ring mold unit according to claim 7, wherein said punched metal strip has a thickness ranging from 0.1 to 0.5 mm.
9. A ring mold unit according to claim 8, wherein said openings of the punched metal strip are lozenge-shaped, and the ratio of the area of said openings to the entire area of the punched metal strip is about 40 %, each of said lozenge-shaped openings having a longer diagonal line of a length ranging from 0.5 to 5.0 mm and a shorter diagonal line of a length ranging from 0.4 to 2.0 mm.
10. A ring mold unit according to claim 1, wherein said cooling ring mold has a plurality of metal pieces disposed on an inner side surface thereof, each of said metal pieces having at least one hole.
11. A ring mold unit according to claim 1, wherein said cooling ring mold has a plurality of substantially U-shaped metal pieces disposed on an inner side surface thereof.
12. A ring mold unit for shaping and tempering a glass sheet in a glass sheet shaping system having a supporting frame comprising a base plate, a plurality of posts erected on said base plate, and a top plate fixed to and supported on said posts, a first lifting/lowering unit mounted on said top plate, an upper mold member vertically movable by said first lifting/lowering unit, a second lifting/lowering unit mounted on said base plate, and a lower mold member vertically movable by said second lifting/lowering unit, said ring mold unit being mounted on said base plate, so that a glass sheet heated to a temperature close to the softening point of glass can be bent by said upper and lower mold members and quenched and tempered by a cooling medium applied from said upper and lower mold members, said ring mold unit comprising:
third and fourth lifting/lowering units mounted on said base plate;
a shaping ring mold vertically movable by said third lifting/lowering unit for bending the glass sheet heated to the temperature close to the softening point of glass, in association with said upper and lower mold members; and a cooling ring mold vertically movable by said fourth lifting/lowering unit for supporting the bent glass sheet while the glass sheet is being quenched and tempered by the cooling medium, said shaping ring mold having a thermally insulating member on an upper surface thereof for supporting thereon, in surface-to-surface contact, said glass sheet inwardly of a peripheral edge thereof; and said cooling ring mold being disposed outwardly of said shaping ring mold and having a shape complementary to the shape of the peripheral edge of said glass sheet for supporting said peripheral edge of the glass sheet.
third and fourth lifting/lowering units mounted on said base plate;
a shaping ring mold vertically movable by said third lifting/lowering unit for bending the glass sheet heated to the temperature close to the softening point of glass, in association with said upper and lower mold members; and a cooling ring mold vertically movable by said fourth lifting/lowering unit for supporting the bent glass sheet while the glass sheet is being quenched and tempered by the cooling medium, said shaping ring mold having a thermally insulating member on an upper surface thereof for supporting thereon, in surface-to-surface contact, said glass sheet inwardly of a peripheral edge thereof; and said cooling ring mold being disposed outwardly of said shaping ring mold and having a shape complementary to the shape of the peripheral edge of said glass sheet for supporting said peripheral edge of the glass sheet.
13. A ring mold unit according to claim 12, wherein said shaping ring mold comprises a lower layer of metal, an intermediate layer of resin fixed to an upper surface of said lower layer, and an upper layer of thermally insulating felt bonded to an upper surface of said intermediate layer and constituting said thermally insulating member.
14. A ring mold unit according to claim 12, wherein said cooling ring mold has a number of recesses defined in an upper surface thereof.
15. A ring mold unit according to claim 14, wherein said recesses of the cooling ring mold are spaced at regular intervals.
16. A ring mold unit according to claim 15, wherein said cooling ring mold has a number of through holes defined respectively in said recesses.
17. A ring mold unit according to claim 15, further including a punched metal strip covering said cooling ring mold, said punched metal strip having a number of openings.
18. A ring mold unit according to claim 17, wherein said punched metal strip is roll-pressed.
19. A ring mold unit according to claim 18, wherein said punched metal strip has a thickness ranging from 0.1 to 0.5 mm.
20. A ring mold unit according to claim 19, wherein said openings of the punched metal strip are lozenge-shaped, and the ratio of the area of said openings to the entire area of the punched metal strip is about 40%, each of said lozenge-shaped openings having a longer diagonal line of a length ranging from 0.5 to 5.0 mm and a shorter diagonal line of a length ranging from 0.4 to 2.0 mm.
21. A ring mold unit according to claim 12, wherein said cooling ring mold has a plurality of metal pieces disposed on an inner side surface thereof, each of said metal pieces having at least one hole.
22. A ring mold unit according to claim 12, wherein said cooling ring mold has a plurality of substantially U-shaped metal pieces disposed on an inner side surface thereof.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1986039346U JPS62153342U (en) | 1986-03-18 | 1986-03-18 | |
| JP61-45584 | 1986-03-28 | ||
| JP1986045584U JPH0441150Y2 (en) | 1986-03-28 | 1986-03-28 | |
| JP61-39346 | 1986-10-04 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1306608C true CA1306608C (en) | 1992-08-25 |
Family
ID=26378705
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000532276A Expired - Fee Related CA1306608C (en) | 1986-03-18 | 1987-03-17 | Ring mold unit for shaping and tempering glass sheet |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US4749399A (en) |
| KR (1) | KR900004120B1 (en) |
| CA (1) | CA1306608C (en) |
| DE (1) | DE3708877A1 (en) |
| FR (1) | FR2597089B1 (en) |
| GB (2) | GB2188045B (en) |
Families Citing this family (25)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2621906B1 (en) * | 1987-10-14 | 1990-01-26 | Saint Gobain Vitrage | IMPROVED GLASS TEMPERING |
| EP0312441B1 (en) * | 1987-10-14 | 1992-03-18 | Saint-Gobain Vitrage International | Tempering glass |
| US5071461A (en) * | 1988-07-18 | 1991-12-10 | Asahi Glass Company, Ltd. | Method and apparatus for bending overlapping glass plates to form a laminated glass structure |
| US5041247A (en) * | 1988-09-29 | 1991-08-20 | General Electric Company | Method and apparatus for blow molding parts with smooth surfaces |
| DE3841989A1 (en) * | 1988-12-14 | 1990-06-21 | Ver Glaswerke Gmbh | METHOD AND DEVICE FOR PRODUCING CURVED AND TENSIONED CAR GLASS PANELS |
| JPH02296741A (en) * | 1989-05-11 | 1990-12-07 | Nippon Sheet Glass Co Ltd | Bend molding device for sheet glass |
| EP0431895A3 (en) * | 1989-12-05 | 1991-08-21 | Nippon Sheet Glass Co. Ltd. | Method of and apparatus for bending and tempering sheet glass |
| JPH0764575B2 (en) * | 1990-01-11 | 1995-07-12 | 日本板硝子株式会社 | Method and apparatus for press bending of flat glass |
| US5118335A (en) * | 1990-10-01 | 1992-06-02 | Ppg Industries, Inc. | Tempering ring design |
| TR26952A (en) * | 1992-02-06 | 1994-09-12 | Nippon Sheet Glass Co Ltd | Carrier roller assembly for pre-bending glass sheets. |
| US5383950A (en) * | 1993-10-04 | 1995-01-24 | Ford Motor Company | Apparatus for supporting a glass sheet during a tempering process |
| US5472470A (en) * | 1994-05-27 | 1995-12-05 | Glasstech, Inc. | Glass sheet press forming and quenching ring |
| US5656055A (en) * | 1995-05-24 | 1997-08-12 | Ppg Industries, Inc. | Sheet shaping press |
| US5679124A (en) * | 1995-08-02 | 1997-10-21 | Glasstech, Inc. | Cooling ring assembly for controlling stresses in a formed glass sheet |
| FI20001634A0 (en) * | 2000-07-10 | 2000-07-10 | Glassrobots Oy | Method for bending glass sheets and bending mold |
| US7459199B2 (en) * | 2004-01-29 | 2008-12-02 | Ppg Industries Ohio, Inc. | Method of and apparatus for strengthening edges of one or more glass sheets |
| EP1874700B1 (en) * | 2005-04-11 | 2019-10-23 | Pittsburgh Glass Works, LLC | Method of and apparatus for strengthening edges of one or more glass sheets |
| KR101631337B1 (en) * | 2008-09-09 | 2016-06-16 | 아사히 가라스 가부시키가이샤 | Air-cool intensifying apparatus for glass plate, and air-cool intensifying method |
| JP5777703B2 (en) * | 2010-05-07 | 2015-09-09 | ナムローゼ・フェンノートシャップ・ベーカート・ソシエテ・アノニムＮ Ｖ Ｂｅｋａｅｒｔ Ｓｏｃｉｅｔｅ Ａｎｏｎｙｍｅ | Mixed fabric for quenching rings |
| US8528366B2 (en) * | 2011-12-22 | 2013-09-10 | Sunpower Corporation | Heat-regulating glass bending apparatus and method |
| CN104903260A (en) * | 2013-01-11 | 2015-09-09 | 旭硝子株式会社 | Manufacturing method and manufacturing device for toughened glass |
| CN104341093B (en) * | 2013-08-05 | 2016-08-10 | 信义汽车玻璃(深圳)有限公司 | A kind of cold ring stand |
| MX2019009802A (en) * | 2017-02-20 | 2019-10-14 | Saint Gobain | Tempering frame for tempering glass panes. |
| CN110997581A (en) * | 2017-08-04 | 2020-04-10 | 法国圣-戈班玻璃公司 | Glass bending mould |
| DE102021134545A1 (en) * | 2021-12-23 | 2023-06-29 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung eingetragener Verein | Glass forming system and method for producing two or more glass products from a glass blank |
Family Cites Families (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3298809A (en) * | 1963-06-20 | 1967-01-17 | Pittsburgh Plate Glass Co | Method of press bending vertically supported glass sheets |
| US3501281A (en) * | 1965-10-06 | 1970-03-17 | Libbey Owens Ford Glass Co | Method of forming an insulated shaping surface on a bending mold |
| US3741743A (en) * | 1972-07-31 | 1973-06-26 | S Seymour | Glass sheet shaping frame |
| US3846104A (en) * | 1973-01-10 | 1974-11-05 | Ppg Industries Inc | Handling glass sheets for shaping and cooling |
| GB1463062A (en) * | 1973-07-20 | 1977-02-02 | Triplex Safety Glass Co | Bending of glass sheets |
| US4282026A (en) * | 1978-01-25 | 1981-08-04 | Mcmaster Harold | Apparatus for bending and tempering glass |
| JPS593939B2 (en) * | 1981-02-26 | 1984-01-26 | 旭硝子株式会社 | Glass plate support frame ring for glass plate bending and strengthening equipment |
| JPS59149934A (en) * | 1983-02-15 | 1984-08-28 | Matsushita Electric Works Ltd | Thermosetting resin molding material |
| CA1257480A (en) * | 1984-07-19 | 1989-07-18 | Masaaki Nushi | Apparatus for and method of bending glass sheets |
| US4556408A (en) * | 1984-08-02 | 1985-12-03 | Ppg Industries, Inc. | Dual ring segmented block tempering ring |
| JPS6183640A (en) * | 1984-09-26 | 1986-04-28 | Nippon Sheet Glass Co Ltd | Pressing of glass plate and device therefor |
-
1987
- 1987-03-17 KR KR1019870002401A patent/KR900004120B1/en not_active IP Right Cessation
- 1987-03-17 US US07/026,835 patent/US4749399A/en not_active Expired - Lifetime
- 1987-03-17 CA CA000532276A patent/CA1306608C/en not_active Expired - Fee Related
- 1987-03-18 GB GB8706415A patent/GB2188045B/en not_active Expired - Fee Related
- 1987-03-18 DE DE19873708877 patent/DE3708877A1/en active Granted
- 1987-03-18 FR FR8703751A patent/FR2597089B1/en not_active Expired - Fee Related
-
1989
- 1989-09-19 GB GB8921215A patent/GB2227485B/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| KR870008802A (en) | 1987-10-21 |
| GB2188045B (en) | 1991-07-17 |
| FR2597089A1 (en) | 1987-10-16 |
| DE3708877C2 (en) | 1992-01-16 |
| DE3708877A1 (en) | 1987-09-24 |
| FR2597089B1 (en) | 1994-05-06 |
| US4749399A (en) | 1988-06-07 |
| GB8921215D0 (en) | 1989-11-08 |
| GB8706415D0 (en) | 1987-04-23 |
| GB2227485A (en) | 1990-08-01 |
| KR900004120B1 (en) | 1990-06-16 |
| GB2227485B (en) | 1991-07-17 |
| GB2188045A (en) | 1987-09-23 |
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Legal Events
| Date | Code | Title | Description |
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| MKLA | Lapsed |