Apparatus for making a coil spring object

Details Apparatus for making a coil spring object Apparatus for making a coil spring object

1976-10-08

1978-02-21

Husar, Francis S.

Plastic article or earthenware shaping or treating: apparatus

Including means advancing continuous length work through...

264DIG40, 4251311, 425296, 425319, 425391, 425462, 425DIG57, B29C 1700

Patent

active

040749584

ABSTRACT:
A machine having two extruders operable to move hot plastic materials of different colors through passages of a die. The die has a merging chamber where the plastic materials from the two extruders are fused in side-by-side positions and an outlet opening through which the fused materials are discharged to form a two-colored ribbon product. A rotatable mandrel located in a water tank winds the ribbon product into a helical coil spring shape. A separator plate surrounding the mandrel guides the ribbon in a helical direction as the ribbon is wound around the mandrel. The ribbon product is cooled and set as it is wound around the mandrel.

REFERENCES:
patent: 2450324 (1948-09-01), Wilson et al.
patent: 3761211 (1973-09-01), Parkinson

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