Cut-off process for terminating injection operations of an injec

Details Cut-off process for terminating injection operations of an injec Cut-off process for terminating injection operations of an injec

1983-07-29

1986-02-04

Woo, Jay H.

Plastic and nonmetallic article shaping or treating: processes

Mechanical shaping or molding to form or reform shaped article

Shaping against forming surface

425147, 425563, B29C 4516

Patent

active

045685088

ABSTRACT:
A cut-off process for an injection molding machine for forming two-layer, directly laminated footwear soles and includes a pressure transmission pin which is guided in a passageway constructed as a through-hole between the mold cavity and the outer surface of the mold. The pressure transmission pin is preloaded by a spring in the direction of the mold cavity so that it can be depressed or actuated under injection pressure. When the injection pressure is relieved and the molded piece shrinks, the pressure transmission pin will be moved back by the spring to its initial position, thereby releasing a switch for a new switching operation for the next, second, injecting operation.

REFERENCES:
patent: 3025568 (1962-03-01), Hardy
patent: 3807914 (1974-04-01), Paulson et al.
patent: 3840312 (1974-10-01), Paulson et al.
DESMA Catalog, Rotary Injection Moulding Machines for the Direct Soling of Thermoplastics Soles to Uppers, published on May 1981.

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