Injection molding apparatus with a one-piece gate insert locatin

Details Injection molding apparatus with a one-piece gate insert locatin Injection molding apparatus with a one-piece gate insert locatin

1997-05-09

1998-12-15

Heitbrink, Tim

Plastic article or earthenware shaping or treating: apparatus

Female mold and charger to supply fluent stock under...

With means to heat or cool

2643289, 425564, 425566, B29C 4523

Patent

active

058493433

ABSTRACT:
Valve gated injection molding apparatus having a valve member with a cylindrical front end portion. A one-piece insert mounted at the front end of a nozzle has both a gate and locating blades extending inwardly from an outer body into a central opening leading to the gate. The inner surfaces of the blades fit around the front end portion of the reciprocating valve pin to guide and very accurately locate it in alignment with the gate. Very accurately maintaining the front end portion of the reciprocating valve pin in alignment with the gate allows it to be cylindrical rather than tapered which produces a much cleaner gate mark.

REFERENCES:
patent: 4303382 (1981-12-01), Gellert
patent: 4875848 (1989-10-01), Gellert
patent: 5334008 (1994-08-01), Gellert
patent: 5505613 (1996-04-01), Krummenacher
D-M-E/Osco Valve Gate Runnerless Molding Systems--p. 43, OVG2 no date.

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