Process and apparatus for molding plastics

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

1980-08-25

1982-08-31

Pavelko, Thomas P.

Plastic and nonmetallic article shaping or treating: processes

Mechanical shaping or molding to form or reform shaped article

Forming plural articles

2643284, 2643289, 425544, B29G 300

Patent

active

043472117

ABSTRACT:
Molding apparatus including an upper and lower mold half and having a plurality of mold cavities is improved by eliminating runners and gates. An open bore adjacent each mold cavity serves as a separate pot for each cavity. A plunger moveable in each bore is used to inject plastics material directly from the bore into the mold cavity into which the bore opens. A molding method is similarly improved by injecting the plastics material directly from the separate bores into the individual mold cavities into which the bores open.

REFERENCES:
patent: 1492906 (1924-05-01), Thomson
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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