Method for making a partitioned container

Details Method for making a partitioned container Method for making a partitioned container

1975-11-19

1976-08-31

Kucia, Richard R.

Plastic and nonmetallic article shaping or treating: processes

Vacuum treatment of work

To degas or prevent gas entrapment

264328, 264329, 264334, B29F 114

Patent

active

039781860

ABSTRACT:
Methods are disclosed for injection molding a partitioned container having four sidewalls, an open top and a closed bottom. Thermoplastic material from a primary sprue flows through a runner system to inlet gates disposed to open into the mold cavity in a generally common plane lying at about the open top of the container to be molded and along opposed container sidewalls intermediate adjacent partition walls. Two mold structures for, inter alia, facilitating the gating method are disclosed. A preferred mold comprises four block members defining, in a closed position, a hollow cavity corresponding to the exterior container dimensions but moveable outwardly to an open position. A plurality of spaced core members are moveable into and out of the hollow cavity to, respectively, define the container mold and permit ejection of the molded container therefrom. Other method features are disclosed.

REFERENCES:
patent: 2542263 (1951-02-01), Schultz
patent: 2799435 (1957-07-01), Abplanalp
patent: 3309451 (1961-03-01), Holtzman
patent: 3475530 (1969-10-01), Cooper
patent: 3568973 (1971-03-01), Rau
patent: 3673302 (1972-06-01), Halsall

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