Plastic and nonmetallic article shaping or treating: processes – With measuring – testing – or inspecting – Positioning of a mold part to form a cavity or controlling...
Patent
1976-04-15
1977-05-03
Husar, Francis S.
Plastic and nonmetallic article shaping or treating: processes
With measuring, testing, or inspecting
Positioning of a mold part to form a cavity or controlling...
264328, 425149, 425249, 425468, B29F 1022, B29F 106
Patent
active
040215156
ABSTRACT:
Plastic injection molding apparatus consisting of two mold sections which define a mold cavity therebetween and are relatively movable to permit formation and removal of an article through the injection of hot melted plastic under high pressure. A plurality of coring pins are employed in conjunction with the mold sections to create voids of desired configuration in the molded article. Means are included to sense the pressure of the hot melted plastic as it enters the apparatus, and to actuate the coring pins into position within the mold cavity to create the desired voids. The coring pins also sense pressure within the mold cavity to achieve a balanced, self-adjusting operation.
REFERENCES:
patent: 3060509 (1962-10-01), McCubbins, Jr.
patent: 3301928 (1967-01-01), Plymale
patent: 3473197 (1969-10-01), Wilds et al.
patent: 3737272 (1973-06-01), Segmuller
patent: 3816047 (1974-06-01), Mohler
patent: 3849053 (1974-11-01), Bruce et al.
A-1 Engineering, Inc.
Briggs W. R.
Husar Francis S.
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