Plastic article or earthenware shaping or treating: apparatus – With mechanical means forming or expanding pores
Patent
1992-04-30
1994-04-19
Nguyen, Khanh
Plastic article or earthenware shaping or treating: apparatus
With mechanical means forming or expanding pores
425112, 425122, 4251261, 425139, 425168, 425215, 425553, 425554, 425556, 425593, 425292, 425395, 425397, 4254031, 425436R, 425436RM, 4254516, 425454, B29C 3910, B29C 4514
Patent
active
053040503
ABSTRACT:
A machine for molding bonded plastics material, in particular expanded or foamable polystyrene in combination with rigid sheet polystyrene, wherein the rigid material (2) is preformed in a preforming station (1) in a preforming mold (33, 36) while simultaneously separating by a cutter (40) the preformed portion from the rigid sheet of starting material to produce separate preformed pieces, the preformed pieces are moved by a transfer table (27) to a molding station (3) while retained on preforming half-mold (33), foamable material (44) is fed to molding mold (41) and molded and bonded on the preformed pieces with sintering by pulse action of steam (45) and, the final molded articles (P) are discharged at discharge station (6). The half-mold (33) is moved alternately between the preforming station (1) and molding station (3), and cooperates with respective counter-molds (36, 41). The scrap is recovered without being involved in the molding stage. The various parts of the machine are controlled by a control device (14) for continuous synchronous cyclical operation.
REFERENCES:
patent: 4105736 (1978-08-01), Padovani
patent: 4464329 (1984-08-01), Whiteside et al.
patent: 4994224 (1991-02-01), Itoh et al.
Devi S.p.A.
Nguyen Khanh
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