Raw resin material feeding system for a molding machine

Details Raw resin material feeding system for a molding machine Raw resin material feeding system for a molding machine

1990-09-11

1992-03-24

Heitbrink, Timothy

Plastic article or earthenware shaping or treating: apparatus

Control means responsive to or actuated by means sensing or...

Feed control of material en route to shaping area

264 404, 425146, 425147, 425171, B29C 4580

Patent

active

050982753

ABSTRACT:
The invention is embodied as a raw material resin feeding apparatus for a molding machine, such as an injection molding machine or an extruder. In this system, upon carrying out a variable resin-change operation by making use of material to be changed, raw material resin is intermittently fed to a feed section by intermittently opening and closing a resin passageway. The improvements reside in that the apparatus includes a raw resin material feed selection mechanism provided midway along a resin passageway for selectively either feeding a predetermined amount intermittently or continuously to a feed section. A resin-change resin feed start detector mechanism is provided for detecting completion of discharge of the amount of raw material corresponding to the predetermined amount, and a resin-change completion detector mechanism is provided. With this apparatus, raw material can be selectively fed to effect quick resin-change or for normal operation.

REFERENCES:
patent: 4867665 (1989-09-01), Wada

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