Method and apparatus for cooling hollow molded product

Details Method and apparatus for cooling hollow molded product Method and apparatus for cooling hollow molded product

B - Operations, Transporting

29

C

B29C 47/88 (2006.01) B29C 47/12 (2006.01)

Patent

CA 2210962

A method of forming a hollow product in a molding apparatus having an upstream and a downstream end comprises extruding a parison of thermoplastic material in a molten state from a heated extruder at the upstream end and moving the material through a product shaping region towards the downstream end of the apparatus. The material is cooled by passing a cooling medium internally of the product from the downstream end towards the upstream end of the apparatus.

Procédé de formage d'un produit creux dans un appareil de moulage (1) comportant une extrémité amont et une extrémité aval, consistant à extruder une paraison de matière thermoplastique à l'état fondu d'une extrudeuse (3) chauffée à l'extrémité amont et à faire avancer ladite matière à travers une zone (5) de façonnage du produit vers l'extrémité aval de l'appareil. La matière est refroidie par passage d'un agent de refroidissement à l'intérieur du produit, de l'extrémité aval vers l'extrémité amont de l'appareil.

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