Method of molding a window assembly

Details Method of molding a window assembly Method of molding a window assembly

1987-01-02

1989-05-16

Lowe, James

Plastic and nonmetallic article shaping or treating: processes

With severing, removing material from preform mechanically,...

Removing surface portion of composite workpiece to expose...

264161, 264247, 264252, 264263, B29C 4514, B29C 3702

Patent

active

048308048

ABSTRACT:
An insert which forms the show or finish surface (the surface exposed to the weather) for an elastomeric gasket in an encapsulated window assembly is thermoformed from a sheet of plastic and placed in the lower half of a mold. A sheet of glazing material is also placed in the lower mold half and an upper mold half is utilized to close the mold cavity. Gasket forming material is injected into the mold cavity to form a gasket in situ which adheres to both the peripheral marginal areas of the transparent sheet and the insert. The insert can be formed with a gate portion which extends into the gate area of the mold and prevents the gasket forming material from flowing onto the surface of the insert which is to be exposed in the final glazing. In one embodiment, the insert can be formed in its final configuration with a central opening leaving the transparent sheet exposed. In an alternate embodiment, the insert is formed with a centrally disposed portion which covers the transparent sheet material to protect it. A groove can be formed in the insert to facilitate removal of the central portion.

REFERENCES:
patent: 2718664 (1955-09-01), Schweitzer
patent: 2736067 (1956-02-01), Boschi
patent: 3263014 (1966-07-01), Deisenroth
patent: 3381340 (1968-05-01), Chapin, Jr.
patent: 4151696 (1979-05-01), Knights
patent: 4376748 (1983-03-01), van Erven

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