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US 4,431,105 AGranted
Material feed unit for an injection molding machine
AssigneeUSM Corporation
InventorsGregory W. Meeker, Frank W. Scarson, Jr.
Life of this patent
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Abstract
A plunger feed system for feeding stiff or thickened material into the injection unit barrel of an injection molding machine, minimizing the feed path of the material, to minimize the degradation of the fibers in the material. The system comprises a pair of pressurizable rams acutely arranged over an injection barrel, each ram also arranged perpendicular to the other, to facilitate the feeding operation and minimize material degradation.
Claims8
A material feed unit, for feeding material with a fibrous texture to an injection unit having a reciprocable screw, said material feed unit comprising:
- a hopper for receiving a quantity of said material;
- a first angularly arranged reciprocal plunger in its retracted most position is enclosed by a partial inner wall of said hopper;
- a second angularly arranged reciprocal plunger in its retracted most position is enclosed by a partial inner wall of said hopper;
- said first and second plungers being arranged in the vertical plane that bisects the axis of rotation of said screw.
1 more element
Dependencies are inferred from the claim text.