Parison forming method and apparatus therefor

Details Parison forming method and apparatus therefor Parison forming method and apparatus therefor

1993-06-30

1995-07-25

Thurlow, Jeffery R.

Plastic and nonmetallic article shaping or treating: processes

Direct application of fluid pressure differential to...

Producing multilayer work or article

264 407, 264515, 264173, 2642092, 2642098, 4251331, 425146, 425381, 425462, 425466, B29C 4720, B29C 4792

Patent

active

054359643

ABSTRACT:
A parison molding method and its apparatus in which at least two kinds of materials are used, and the layer formation and dispersion are uniform in the weld part and in the circumferential direction. In the parison molding method and its apparatus, molten resin at a weld part within a parison head is discharged out of the parison head by way of a flow control valve.

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patent: 5252268 (1993-10-01), Ohno
patent: 5281126 (1994-01-01), Terada et al.

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