Mold apparatus and method for injection molding

Details Mold apparatus and method for injection molding Mold apparatus and method for injection molding

2008-07-30

2009-10-06

Del Sole, Joseph S. (Department: 1791)

Plastic and nonmetallic article shaping or treating: processes

Mechanical shaping or molding to form or reform shaped article

Shaping against forming surface

C425S562000, C425S572000

Reexamination Certificate

active

07597836

ABSTRACT:
A mold apparatus includes a first mold core, a second mold core, a sprue, a first insert, and a second insert. The first and second mold cores cooperatively define a first mold chamber, a second mold chamber, a first runner connected to the first mold chamber, and a second runner connected to second mold chamber. The sprue bushing has a sprue, a first guiding groove, and a second guiding groove. The first and second guiding grooves are configured for guiding molten material from the sprue to the respective first and second runners. The first and second guiding grooves each have a recess. The first insert has a protruded end portion. The second insert has a recessed end portion. The first and second inserts are inserted into the first or second recess, thereby blocking the corresponding first or second runner or compensating the corresponding first or second recess.

REFERENCES:
patent: 3120680 (1964-02-01), Villasana
patent: 4909725 (1990-03-01), Ward
patent: 5208053 (1993-05-01), Vandenberg
patent: 5849236 (1998-12-01), Tatham

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