High cavitation, low tonnage rubber mold machine and method

Details High cavitation, low tonnage rubber mold machine and method High cavitation, low tonnage rubber mold machine and method

2008-03-04

2008-03-04

Mackey, James R (Department: 1722)

Plastic and nonmetallic article shaping or treating: processes

Mechanical shaping or molding to form or reform shaped article

Forming plural articles

C264S328100, C425S190000, C425S451700, C425S588000, C425S595000

Reexamination Certificate

active

11538953

ABSTRACT:
A rubber injection molding apparatus and method for simultaneously molding a plurality of work parts (40) in separate molds (30) using a single, vertically oriented press machine (22). A clamping mechanism (52) is responsive to the vertical, reciprocating motion of the press ram (26) for converting the generally vertical motion of the press ram (26) into a horizontal clamping force to squeeze and hold the molds while rubber is injected into their cavities (38). The molds (30) each have two mold halves (32, 34) joining one another along a parting line interface (36) with the mold cavity (38) in between. The mold halves (32, 34) are received in universal carriers (62), which in turn are suspended between and slideable along spaced-apart first (58) and second (60) rails. A large number of mold cavities (38) can be filled simultaneously using a vertically oriented press machine (22). The plurality of molds (30) may contain different part configurations which are filled simultaneously in a single molting operation. Because the molds (30) are not fastened to platens as in prior art vertical press machines, changeover times are substantially decreased.

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