Method and machine for moulding bonded plastics material

Details Method and machine for moulding bonded plastics material Method and machine for moulding bonded plastics material

C - Chemistry, Metallurgy

08

J

C08J 9/35 (2006.01) B29C 33/34 (2006.01) B29C 44/14 (2006.01)

Patent

CA 2067914

METHOD AND MACHINE FOR MOULDING BONDED PLASTICS MATERIAL Abstract In moulding bonded plastics material, in particular expanded polystyrene in combination with rigid sheet polystyrene, the rigid material (2) is firstly preformed, while simultaneously separating the preformed portion from the starting material, and the preformed piece is transferred to the moulding stage while contained in the preforming half-mould (33). While the expanded material is being moulded by sintering and the pulse action of steam, the previously moulded piece (P) is discharged. The preforming half-mould (33) is moved alternately between the preforming position and the moulding position, to cooperate with relative counter-moulds (36, 41). The scrap is recovered without being involved in the moulding stage.

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