Method of molding a hollow retainer in a foam article

Details Method of molding a hollow retainer in a foam article Method of molding a hollow retainer in a foam article

1981-10-23

1983-08-23

Lowe, James B.

Plastic and nonmetallic article shaping or treating: processes

Pore forming in situ

Composite article making

264 464, 264 469, 264274, 264278, B29D 300, B29D 2700

Patent

active

044003366

ABSTRACT:
A method by which a previously molded hollow plastic retainer having an open end portion necessitated by the need to withdraw a mold core therefrom may be embedded in a molded trim article with the open end beneath the surface and yet the molding material is prevented from flowing through the open end portion and filling the hollow of the retainer. The method comprises the steps of loading the molded plastic retainer between a first mold portion having a wall extending into closure of the opening in the molded plastic retainer and a second mold portion spaced from the first mold portion to define the desired confines of the molded trim article in which the plastic retainer is to be embedded; injecting the molding material for the molding of the molded trim article into the space between the first and second mold portions; and separating the first and second mold portions after the curing of the molding material whereby the plastic retainer is embedded in the molded trim article without the flow of molding material through the open end portion to fill the desired hollow in the molded plastic retainer.

REFERENCES:
patent: 3016578 (1962-01-01), Rohe
patent: 3742995 (1973-07-01), Confer et al.
patent: 4106745 (1978-08-01), Carron

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