Method for making an injection-molded product having a partly th

Details Method for making an injection-molded product having a partly th Method for making an injection-molded product having a partly th

1989-10-02

1990-12-25

Heitbrink, Jill L.

Plastic and nonmetallic article shaping or treating: processes

Mechanical shaping or molding to form or reform shaped article

Shaping against forming surface

2643288, 26432813, B29C 4530

Patent

active

049801155

ABSTRACT:
An injection molding method for molding a product having a partly thin portion comprising the steps of: providing a molding die including a slide block disposed in one of male and female dies and having in cross section a dimension corresponding to a dimension of the thin portion of the product; defining a cavity between the male and female dies with maintaining the slide block in a retracted position; injecting a molten resin material into the cavity through a gate; and advancing the slide block to project into the cavity before the resin material is solidified, thereby filling the cavity with the resin material while forming the thin portion.

REFERENCES:
patent: 4184835 (1980-01-01), Talbot
patent: 4299441 (1981-11-01), Parker
patent: 4343120 (1984-02-01), Oloisio, Jr. et al.
patent: 4385025 (1983-05-01), Salerno et al.
patent: 4410479 (1983-10-01), Cyriax
patent: 4459256 (1984-07-01), Ziegler
patent: 4470786 (1984-09-01), Sano et al.
patent: 4540534 (1985-09-01), Grendol
patent: 4657496 (1987-04-01), Ozeki et al.

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