Rotational slush molding method

Details Rotational slush molding method Rotational slush molding method

1988-12-23

1990-02-06

Thurlow, Jeffery

Plastic and nonmetallic article shaping or treating: processes

Recycling of reclaimed or purified process material

Of gaseous process material

2642976, 2642978, 264302, 264310, 264DIG60, 425425, 425434, B29C 4118, B28B 506

Patent

active

048986976

ABSTRACT:
A rotational molding process for slush casting mold with plastisol includes providing a conveyor having a plurality of spaced reversing arm assemblies, each arm assembly having opposite ends carrying molds thereon; providing first and second conveyor paths for the molds on the opposite ends of each arm assembly and locating one of the first and second conveyor paths inside the outer perimeter of the other of the first and second conveyor paths; preheating a mold on one of the arm assemblies on the first conveyor path and filling the preheated mold with an excessive charge of plastisol to form a gel layer thereon while on the first conveyor path and thereafter dumping plastisol from the preheated mold for return to a supply source of plastisol; and simultaneously curing a gel layer on another of the arm assemblies by directing the mold through the second conveyor path as the preheated mold on the other end of the arm assembly is being filled and dumped whereby the movement of an arm assembly produces simultaneous filling and curing of a mold on one of the arm assemblies and simultaneous dumping and curing of a mold on another of the arm assemblies.

REFERENCES:
patent: 1488973 (1924-04-01), Brookes
patent: 2834986 (1958-05-01), Bailey et al.
patent: 4056590 (1977-11-01), Farrell

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