| 摘要 |
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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