Hot-melt adhesive recycling system

Plastic article or earthenware shaping or treating: apparatus – Female mold and means to feed measured charge of fluent...

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Details

249120, 249127, 249173, 264 37, 425440, 425DIG44, B29C 3340, B29C 3350, B29C 3936

Patent

active

050678876

ABSTRACT:
A system for recovering hot-melt materials for reuse in a glue gun includes a flexible mold form mounted in a carrier and having an internal cavity that approximates the dimensions of the preformed hot-melt sticks. In order to change from one type hot-melt material to another, the sticks of the desired material are loaded into the gun while the heated, hot-melt material in the gun is discharged into the mold form. The hot-melt material flows into the mold form and assumes the shape of a conventional preformed stick. After cooling and solidification of the material, the mold form is removed from its carrier and the cooled, cast stick is removed from the mold form for reuse. The mold form is fabricated from a flexible, heat-resistant material, such as a silicone rubber, and includes an elongated tubular portion having a tapered exterior to facilitate removal from its carrier and an internal bore dimensioned to produce a cast stick having the dimensions of the preformed stick. The system advantageously allows recycling hot-melt material purged from a glue gun when changing over from one type of hot-melt material to another.

REFERENCES:
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patent: 3104665 (1959-03-01), Towns
patent: 3527439 (1970-09-01), Lawnmaster
patent: 3917123 (1975-11-01), Grenfell
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patent: 3937438 (1976-02-01), Fox et al.
patent: 4028458 (1977-06-01), Wallace
patent: 4093175 (1978-06-01), Putzer et al.
patent: 4379516 (1983-04-01), Barlogis

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