Extruding a thermoplastic laminate with recycled trimmings

Details Extruding a thermoplastic laminate with recycled trimmings Extruding a thermoplastic laminate with recycled trimmings

1987-02-06

1988-07-12

Thurlow, Jeffery

Plastic and nonmetallic article shaping or treating: processes

Recycling of reclaimed or purified process material

Of gaseous process material

264171, 264DIG69, 4251311, 4251335, 425462, B29C 4706, B29C 4714

Patent

active

047568585

ABSTRACT:
An apparatus for extruding a thermoplastic laminate has a nozzle assembly having a nozzle body centered generally on a plane and formed at the plane with a merge passage, with an outlet slot opening in one direction from the merge passage, with core-layer distribution and intake passages centered on the plane and opening in the opposite direction into the merge passage, and with cover-layer distribution and intake passages opening laterally into the merge passage. A core-layer fitting formed with tempering chambers forms part of the core-layer intake passage and a trimmings fitting mounted on the nozzle body has a trimmings intake passage and a trimmings feed passage extending therefrom to the cover-layer distribution passage. A liquefied core-layer resin is fed under pressure to the core-layer intake passage and therethrough to the merge passage and outlet slot. Laminate trimmings are also fed under pressure to the trimmings intake passage and therethrough and through the trimmings feed passage to the merge passage, and a liquefied cover-layer resin is fed under pressure to the cover-layer intake passage and therethrough to the merge passage and outlet slot and also to the trimmings feed passage to mix with the liquefied trimmings therein.

REFERENCES:
patent: 3398431 (1968-08-01), Corbett
patent: 3479425 (1969-11-01), Lefevre et al.
patent: 3761211 (1973-09-01), Parkinson
patent: 3924990 (1975-12-01), Schrenk
patent: 4144011 (1979-03-01), Sponaugle
patent: 4165210 (1979-08-01), Corbett
patent: 4476080 (1984-10-01), Komoda et al.
patent: 4533510 (1985-08-01), Nissel

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