Method of manufacturing glass panel and gasket assemblies

• US 5,772,822 A
• Filed: 03/14/1996
• Issued: 06/30/1998
• Est. Priority Date: 03/14/1996
• Status: Expired due to Fees

• Current Assignee: GDX North America Incorporated
• Original Assignee: Gencorp Incorporated
• Inventors: Dupuy, Ronald E.
• Primary Examiner(s): Lorin, Francis J.
• Application Number:
  US08/615,376
• Time in Patent Office: 838 Days
• Field of Search: 156/108, 156/245, 156/293, 156/307.7, 264/252, 264/254, 264/255, 264/259, 264/260, 264/251, 264/DIG. 59, 264/236
• US Class Current: 156/108
• CPC Class Codes: B29C 2791/001 Shaping in several steps
• CPC Class Codes: B29C 33/44 with means for, or specially constructed to facilitate, the removal of articles, e.g. of undercut articles
• CPC Class Codes: B29C 35/0222 the curing continuing after removal from the mould B29C35/0233 takes precedence
• CPC Class Codes: B29C 45/00 Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor injection blow-moulding B29C49/06
• CPC Class Codes: B29C 45/14 incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles B29C45/1671 takes precedence
• CPC Class Codes: B29C 45/44 for undercut articles
• CPC Class Codes: B29C 63/0034 the strip material being folded
• CPC Class Codes: B29C 65/665 using shrinking during cooling
• CPC Class Codes: B29C 66/71 characterised by the composition of the plastics material of the parts to be joined welding bar compositions B29C65/125
• CPC Class Codes: B29C 66/73753 the to-be-joined area of at least one of the parts to be joined being partially cured, i.e. partially cross-linked, partially vulcanized
• CPC Class Codes: B29C 70/70 Completely encapsulating inserts B29C70/86 takes precedence
• CPC Class Codes: B29C 70/763 the edges being disposed in a substantial flat plane
• CPC Class Codes: B29K 2007/00 Use of natural rubber as moulding material
• CPC Class Codes: B29K 2021/00 Use of unspecified rubbers as moulding material
• CPC Class Codes: B29K 2023/16 EPM, i.e. ethylene-propylene copolymers; EPDM, i.e. ethylene-propylene-diene copolymers; EPT, i.e. ethylene-propylene terpolymers
• CPC Class Codes: B29K 2027/06 PVC, i.e. polyvinylchloride
• CPC Class Codes: B29K 2105/24 crosslinked or vulcanised
• CPC Class Codes: B29K 2105/243 Partially cured
• CPC Class Codes: B29K 2709/08 Glass
• CPC Class Codes: B29L 2031/265 Packings, Gaskets
• CPC Class Codes: B29L 2031/7782 : Glazing
• CPC Class Codes: B60J 10/70 : specially adapted for windows or windscreens

Abstract

A method of manufacturing a glass panel and gasket assembly includes providing a glass panel and a mold defining a correspondingly shaped mold cavity to create a gasket for disposition about the periphery of the glass panel, filling the mold with a gasket material, allowing the gasket material to partially cure, removing the gasket from the mold and installing the gasket on the glass panel, allowing the gasket to continue to cool, shrink and cross-link so that the gasket is in tension and therefore intimately and tightly retained about the periphery of the glass. Metal shaping and reinforcing strips may also be molded into the gasket.

Claims

1. A process for manufacturing a glass panel and gasket assembly comprising the steps of:

providing a mold cavity defining a cross sectional shape of a desired gasket,

injecting a curable elastomer into said mold cavity to form a gasket having a channel with first and second sidewalls,

allowing such elastomer of such gasket to partially cure,

removing such partially-cured gasket from such mold cavity,

providing a glass panel having a periphery adjacent a first surface and a second surface,

inserting such glass panel within the channel of such partially-cured gasket with a portion of each of said surfaces in contact with one of said sidewalls, and

completing curing of such elastomer of such gasket,

whereby such partially-cured gasket is sealingly disposed on the portions of such surfaces of such glass panel when such partially-cured gasket becomes completely cured.

2. The process of claim 1 further including the step of inserting a metal strip into at least a portion of such mold cavity.

3. The process of claim 1 further including the step of controlling the rate of cooling of such gasket.

4. The process of claim 1 further including the step of inserting an elongate gasket portion having both elastomeric and metal components into such mold cavity.

5. The process of claim 1 wherein such elastomer is rubber.

6. The process of claim 1 wherein such elastomer is an ethylene-propylene-diene monomer.

7. A process for manufacturing a glass panel and gasket assembly, comprising the steps of:

providing a mold cavity defining a shape of a desired gasket,

injecting a curable elastomer into such mold cavity to form a gasket and a channel in such gasket,

removing such gasket from such mold cavity after only partial curing of such elastomer has occurred,

inserting peripherally adjacent first and second surfaces of a glass panel within the channel of such partially-cured gasket, and

completing curing of such gasket, whereby such partially-cured gasket is retained on the peripherally adjacent surfaces of such glass panel when such partially-cured gasket becomes completely cured.

8. The process of claim 7 further including the step of inserting a metal strip into at least a portion of such mold cavity.

9. The process of claim 7 further including the step of providing heat to such mold cavity to facilitate partial curing of such elastomer.

10. The process of claim 7 further including the step of providing a preformed gasket portion in such mold cavity.

11. The process of claim 10 wherein such preformed gasket portion includes an elastomeric and a metal component.

12. The process of claim 7 further including the step of providing a center plate in such mold cavity and translating such center plate to facilitate removal of such gasket from such mold cavity.

13. A method for manufacturing a glass panel and gasket assembly using a mold assembly comprising and upper mold section and a lower mold section including a plurality of edges plates and a center plate having a lip, the method comprising the steps of:

providing a mold cavity having a shape corresponding to a shape of a glass panel having first and second surfaces, the mold cavity including an upper mold cavity formed by the upper mold section and a lower mold cavity formed by the lower mold section;

injecting a curable elastomer into the mold cavity to form a gasket about the center plate of the lower mold section, the gasket defining an inside channel having a pair of sidewalls formed by the lip of the center plate;

partially curing the elastomer of the gasket while the upper and lower mold sections are closed;

removing the gasket from the mold cavity by opening the upper and lower mold sections while the elastomer is partially cured;

disposing portions of the first and second surfaces of the glass panel adjacent the sidewalls of the gasket channel while the elastomer is partially cured; and

completing curing the elastomer of the gasket while the portions of the first and second surfaces of the glass panel are disposed within the channel of the gasket,

whereby the gasket is sealingly disposed on portions of the first and second surfaces of the glass panel without using adhesives.

14. The method according to claim 13, further comprising the step of inserting a metal strip into at least a portion of the mold cavity.

15. The method according to claim 13, further comprising the step of inserting an elongate gasket portion having both elastomeric and metal components into the mold cavity.

16. The method according to claim 13, wherein the elastomer is made of a material capable of maintaining its cross sectional shape when partially cured.

17. The method according to claim 13, wherein the upper and lower mold sections are in vertical alignment with one another.