Process for manufacturing hollow plastic objects

Details Process for manufacturing hollow plastic objects Process for manufacturing hollow plastic objects

B - Operations, Transporting

29

C

B29C 33/52 (2006.01) B29C 33/38 (2006.01)

Patent

CA 2283722

A process is disclosed for manufacturing hollow plastic objects. Cores are produced in casting moulds, the cores are placed into moulds of moulding presses and are enveloped with plastics (35) which then solidify. The moulds are then heated up to a temperature at which the cores melt and are withdrawn from the moulds. The cores are made of shell halves (32, 33) which are assembled before being extrusion-coated with plastics (35).

Selon ce procédé de fabrication de corps creux en matière plastique, on produit des noyaux dans des moules de coulée. Les noyaux sont placés dans des moules de presses à mouler et sont enrobés de matière plastique (35) qui ainsi se solidifie. Les moules sont ensuite chauffés jusqu'à une température à laquelle les noyaux fondent et sont retirés des moules. Les noyaux sont constitués de demi-coques (32, 33) que l'on réunit avant de les recouvrir de matière plastique (35) par extrusion.

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