Method of producing molding

Details Method of producing molding Method of producing molding

1992-05-14

1995-07-18

Silbaugh, Jan H.

Plastic and nonmetallic article shaping or treating: processes

Mechanical shaping or molding to form or reform shaped article

To produce composite, plural part or multilayered article

26432812, 425130, B29C 4516

Patent

active

054339103

ABSTRACT:
A orifice passage for introducing excessive resin into a disposal tab forming cavity is provided at one end of a main cavity in a mold for sandwich molding. The section of the orifice passage is thinner in the central portion than in the opposite sides thereof. A thermoplastic elastomer for forming an outer layer of the molding is injected into the main cavity and then talc-containing polypropylene for forming the core of the molding is injected. The flow rate of the resins flowing through the orifice passage at this time becomes substantially uniform over the entirety of the section. Therefore, the talc-containing polypropylene sufficiently extends toward the opposite sides of the main cavity.

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patent: 5087488 (1992-02-01), Cakmakci
Mukai et al Application No. 07/826,612 filed Jan. 28, 1992.

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