Preformed part made of plastics with integrally formed rubber el

Details Preformed part made of plastics with integrally formed rubber el Preformed part made of plastics with integrally formed rubber el

1989-02-06

1990-11-13

Schwartz, Pamela R.

Stock material or miscellaneous articles

Structurally defined web or sheet

Including aperture

264275, 264276, 428156, 428192, B32B 310

Patent

active

049701037

ABSTRACT:
A preformed part made of plastics material, especially a sheet-like plastics part made by injection molding is formed to be integral with elastic portions. The elastic portions serve as seals, as for feed-through holes in the plastics part. A ring-shaped circular closed protruding edge or ring-shaped rib, formed integrally with the plastics part around the regions to be coated with rubber, limit the region where elastic material is deposited to integrate with the plastics material. An annular region around rib has a radial span around the recesses, bore holes or edges into which the rubber material is injected, and enables insertion of the elastic material despite the presence of differential thermal expansion between the plastic part and a metal forming tool to shape the elastic material.

REFERENCES:
patent: 3398222 (1968-08-01), Kaufman, Jr. et al.

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