Process and apparatus for molding plastics

Details Process and apparatus for molding plastics Process and apparatus for molding plastics

1981-12-14

1983-06-14

Pavelko, Thomas P.

Plastic and nonmetallic article shaping or treating: processes

Mechanical shaping or molding to form or reform shaped article

Forming plural articles

2642978, 2643284, 2643288, 425544, 425588, B29G 300

Patent

active

043882650

ABSTRACT:
In molding a number of articles of plastics at the same time with use of an upper mold and a lower mold having a multiplicity of cavities in the fitting surfaces thereof, a process for molding plastics by supplying the molding material to a plurality of pots each provided for one pair of cavities in proximity thereto, and injecting the material into the cavities from the pots through gates without passing the material through any runner. An apparatus for practicing the process is also disclosed. The waste of the molding material can be reduced at least by the amount conventionally needed for filling the main and auxiliary runners.

REFERENCES:
patent: 2130254 (1938-09-01), Visman
patent: 3483287 (1969-12-01), Davis
patent: 3763300 (1973-10-01), Spanjer
patent: 3764248 (1973-10-01), Hall

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