Extrusion molding equipment for multi-layer parison

Details Extrusion molding equipment for multi-layer parison Extrusion molding equipment for multi-layer parison

1988-04-18

1989-09-19

Silbaugh, Jan H.

Plastic article or earthenware shaping or treating: apparatus

Means feeding fluent stock from plural sources to common...

Extrusion shaping means

264 405, 264 407, 264515, 4251331, 425145, 425147, 425166, 425381, 425523, 425532, B29C 4708, B29C 4736, B29C 4792

Patent

active

048676640

ABSTRACT:
An extrusion molding equipment for a multi-layer parison which includes an operation position detecting device for detecting an operation position of an accumulator extruding an layer of resin material invisible from outside the parison. A pressure detecting device is provided for detecting pressure of the inner resin material in an inner resin conduit. An extrusion amount control device for the inner resin material is also provided for controlling an extrusion amount of the inner resin by the use of a signal indicating the operation position from the operation position detecting device, and a signal indicating the pressure from the pressure detecting device.

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