Method of molding a hollow retainer in a foam article
US4400336A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Oct 23, 1981 |
| Grant date | Aug 23, 1983 |
| Priority date | — |
| Expiry date | Oct 23, 2001 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29L2031/3014
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.