Vacuum sizing apparatus and method of using same

Plastic and nonmetallic article shaping or treating: processes – Direct application of fluid pressure differential to... – Production of continuous or running length

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264562, 264568, 264178R, 2642094, 26417719, 425 71, 425325, 425388, B29C 4790

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active

056076380

ABSTRACT:
A vacuum sizing apparatus and method of cooling and sizing plastic extrusions. In one embodiment the molten plastic extrudate enters a first vacuum chamber, passes into an ambient air environment, and then passes into a second water chamber. The first vacuum chamber includes entry and exit sizing plate manifolds to impart and maintain the size and shape of the plastic extrudate.

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