Plastic and nonmetallic article shaping or treating: processes – Mechanical shaping or molding to form or reform shaped article – Forming plural articles
Patent
1974-01-14
1976-01-20
White, Robert F.
Plastic and nonmetallic article shaping or treating: processes
Mechanical shaping or molding to form or reform shaped article
Forming plural articles
264120, B29J 504
Patent
active
039339688
ABSTRACT:
A method of moulding articles from a paste like material is disclosed in which a moulding tunnel having a composite piston movable therein is closed at one end by means of a separable mould insert. The moulding material is supplied into the tunnel between the composite piston and the mould insert by a suitable hopper and a plurality of transversely operable pistons are movable into the tunnel from the sides and bottom thereof. Upon a two-stage movement of the composite piston and the transversely movable pistons the mouldable material is forced into the mould insert to form an article. The mould insert and the article are then ejected from the mould tunnel and conveyed through a curing tunnel in contiguous relationship to a plurality of other mould inserts having moulded articles therein. At the end of the curing tunnel, the mould inserts are separated and the moulded article ejected. The mould inserts are then conveyed back to the tunnel for a new moulding operation.
REFERENCES:
patent: 1738046 (1929-12-01), Elton et al.
patent: 2076315 (1937-04-01), Albrecht
patent: 2535241 (1950-12-01), Stewart, Jr. et al.
patent: 3192561 (1965-07-01), Archer et al.
patent: 3506755 (1970-04-01), Rudder et al.
Balhoff T. E.
White Robert F.
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