Moldings and apparatus and process for manufacturing the same

Details Moldings and apparatus and process for manufacturing the same Moldings and apparatus and process for manufacturing the same

1991-05-06

1992-06-23

Van Balen, William J.

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49475, 49497, 49498, 428 31, 428188, 428217, 428358, B32B 702, B32B 320, E06B 716

Patent

active

051241897

ABSTRACT:
A molding including a portion formed of hard rubber, a portion formed of sponge rubber, and a portion formed of hydrid of the hard rubber and the sponge rubber. The hybrid is effectively formed by simultaneously introducing the hard and sponge rubber into a flow port communicated with an extruding opening of a molding die whereby the molding is formed in one extruding process and from only two types of rubber. Apparatus for manufacturing the molding includes a feed pipe for feeding the hard rubber, a feed pipe for feeding the sponge rubber, and a molding die having an extruding opening and at least three flow conduits communicating with the extruding opening.

REFERENCES:
patent: 4898760 (1990-02-01), Halberstadt et al.
patent: 5013379 (1991-05-01), Brooks et al.

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