Method of producing a hollow-bodied component

Details Method of producing a hollow-bodied component Method of producing a hollow-bodied component

1987-11-12

1990-02-13

Salbaugh, Jan H.

Plastic and nonmetallic article shaping or treating: processes

Pore forming in situ

Composite article making

264 455, 264 51, 264314, 264248, 1563042, 1563071, B29C 6502, B29C 3926, B29C 6722

Patent

active

049004875

ABSTRACT:
Seamless hollow-bodied objects of expanded polystyrene are made by a method in which polystyrene material in bead form is agglomerated about a solid removable core in a split mold. The mold halves are opened and the solid core is removed, leaving at least two preliminary sections in contact with the mold halves. The mold is reclosed, and an inflatable core is inserted and inflated to desired dimensions. The inflatable core is supplied with steam for its inflation and the polystyrene heating is completed. After deflation and removal of the inflatable core and opening of the mold halves, there is obtained a desired seamless hollow article having smooth surfaces inside and out.

REFERENCES:
patent: 1163987 (1915-12-01), Eggers
patent: 3530208 (1970-09-01), Rausing
patent: 3832437 (1974-08-01), Taylor

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