Apparatus for injection molding

Details Apparatus for injection molding Apparatus for injection molding

2006-08-08

2011-11-22

Del Sole, Joseph S. (Department: 1743)

Plastic article or earthenware shaping or treating: apparatus

Distinct means to feed, support or manipulate preform stock...

Female mold type means

C425S112000, C425S125000, C425S470000

Reexamination Certificate

active

08062016

ABSTRACT:
An injection molded article with which a sheet-like material, such as a decorative sheet, is integrated is manufactured without causing damage to the sheet-like material. A molten resin injected into a mold cavity, passes smoothly a peripheral edge of the mold cavity, and flows into a groove portion without accumulating in the vicinity of the peripheral edge. When cooling the molten resin, the temperature of the molten resin in the groove decreases more quickly than the temperature of the molten resin in the mold cavity, because the volume of the groove portion is smaller. As a result, the viscosity of the molten resin in the groove portion and in the vicinity of the peripheral edge of the mold cavity is increased rapidly, preventing a further volume of the molten resin from flowing into the groove portion. The sheet-like material in the vicinity of the peripheral edge is covered by the resinous material of diminished fluidity and protected against exposure to heat and/or pressure of the molten resin.

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