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

1995-01-30

1996-06-11

Thurlow, Jeffery R.

Plastic and nonmetallic article shaping or treating: processes

Direct application of fluid pressure differential to...

Corrugating

264568, 264150, 264237, 264348, 425 721, 4253261, 425336, 4253871, 425396, 4253791, B29C 4788

Patent

active

055252893

ABSTRACT:
In a method of forming a hollow product in a molding apparatus having an upstream and a downsteam end a parison of thermoplastic material is extruded in a molten state from a heated extruder at the upstream end and moved 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.

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patent: 4710337 (1987-12-01), Nordstrom
patent: 5139730 (1992-08-01), Holso et al.
patent: 5296188 (1994-03-01), Lupke

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