Method for press-molding thermoplastic resin

Details Method for press-molding thermoplastic resin Method for press-molding thermoplastic resin

1990-01-25

1991-09-17

Thurlow, Jeffery

Plastic and nonmetallic article shaping or treating: processes

With measuring, testing, or inspecting

Measuring a weight or volume

264325, 264349, 264 403, 264 407, B29C 4792

Patent

active

050493256

ABSTRACT:
A process is provided in which a plasticized resin is extruded from an extruding machine into an accumulator into which the resin is stored by an amount which exceeds the amount required for one resin molding operation. The stored resin, in operation, is fed through a flexible hose to a supply and measuring device, such as a gear pump, under controlled pressure conditions. The resin is measured by the supply and measuring device by regulating the flow rate of the resin and is then charged into the mold cavity in a measured amount. The clamping of the mold can be effected by a clamping force less than that required by a conventional press-molding machine.

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