Valve gate assembly

Details Valve gate assembly Valve gate assembly

1997-08-14

1998-11-24

Heitbrink, Jill L.

Plastic and nonmetallic article shaping or treating: processes

With severing, removing material from preform mechanically,...

Making hole or aperture in article

2643281, 2643289, 425564, 425566, 425577, 425810, B29C 4538

Patent

active

058402314

ABSTRACT:
A valve gate assembly including a movable valve stem for guiding molten resin to a molding area, a nozzle body portion enclosing the valve stem and a mold cavity for receiving molten plastic to form a molded part formed between cooperating first and second mold halves. An injection orifice is provided downstream of the valve stem communicating with the mold cavity for transfer of the molten plastic to the mold cavity, and a movable core pin is provided contacting the valve stem and movable between a forward position opening the injection orifice and a rearward position closing the injection orifice.

REFERENCES:
patent: 4340353 (1982-07-01), Mayer
patent: 4368028 (1983-01-01), Grish et al.
patent: 5068065 (1991-11-01), Maus et al.
patent: 5162125 (1992-11-01), Akselrud et al.
patent: 5324190 (1994-06-01), Frei
patent: 5423672 (1995-06-01), Gordon
patent: 5460763 (1995-10-01), Asai
patent: 5690974 (1997-11-01), Miyairi

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