Plastic article or earthenware shaping or treating: apparatus – Preform reshaping or resizing means: or vulcanizing means... – Including shaping means comprising fluid pressure contacting...
Patent
1982-02-12
1983-08-30
Flint, Jr., J. Howard
Plastic article or earthenware shaping or treating: apparatus
Preform reshaping or resizing means: or vulcanizing means...
Including shaping means comprising fluid pressure contacting...
4253261, 249134, B29C 1704
Patent
active
044014244
ABSTRACT:
The disclosure relates to a vacuum sizing device for cooling and sizing plastic extrusions immediately downstream of the extrusion die. The device includes a plurality of pairs of upper and lower sizing elements which are clamped between upper and lower backing members. The elements are shaped to define a passageway through the sizing device having a cross-sectional shape and size corresponding to the required profile shape and size of the extrusion. Vacuum chambers and cooling chambers are provided in the sizing elements.
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