Coextrusion blowmolding process

Details Coextrusion blowmolding process Coextrusion blowmolding process

1987-12-21

1989-04-25

Silbaugh, Jan H.

Plastic and nonmetallic article shaping or treating: processes

Recycling of reclaimed or purified process material

Of gaseous process material

264 407, 264173, 264515, 425132, B29C 4904, B29C 4922, B29C 4706

Patent

active

048246182

ABSTRACT:
A process for coextrusion blowmolding of multilayer polymer articles, wherein a multilayer parison is extruded through a die, introduced into a mold, and blowmolded, the flow of multilayer plastic material being periodically interrupted, and additional plastic material being injected into the extrusion die at timed intervals, so that this additional material forms portion of the parison which later are trimmed from the molded article and reprocessed for reuse.

REFERENCES:
patent: 3461197 (1969-08-01), Lemelson
patent: 4040233 (1977-08-01), Valyi
patent: 4056344 (1977-11-01), Lemelson
patent: 4276250 (1981-06-01), Satchell et al.
patent: 4510115 (1985-04-01), Gokcen et al.
patent: 4522775 (1985-06-01), Briggs et al.

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