Multilayer parison extrusion molding machine for blow molding

Details Multilayer parison extrusion molding machine for blow molding Multilayer parison extrusion molding machine for blow molding

1977-03-09

1977-09-13

Lazarus, Richard B.

Plastic article or earthenware shaping or treating: apparatus

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

Extrusion shaping means

264173, 425381, 425462, 425466, 425532, B29D 2304

Patent

active

040478688

ABSTRACT:
A multilayer parison extrusion molding machine for blow molding which is characterized in that a main extruder and one or more sub-extruders are radially attached to special diehead and said die head comprises a core holder having a core pin at the lower end; a cylindrical mandrel enclosing said core holder; a plurality of sleeves surrounding said mandrel; housings surrounding said sleeves respectively; one or more pressure rings controlling the space in molten resin passages; pressure ring adjusting screws; an extrusion die; and a die adjusting screw.

REFERENCES:
patent: 3345690 (1967-10-01), Hagen
patent: 3419938 (1969-01-01), Sonia et al.
patent: 3608136 (1971-09-01), Tripptrap
patent: 3649143 (1972-03-01), Papesh et al.
patent: 3707590 (1972-12-01), Wiggins et al.

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