Blow molding extrusion die with rectangular slots

Details Blow molding extrusion die with rectangular slots Blow molding extrusion die with rectangular slots

1993-09-16

1996-01-23

Woo, Jay H.

Plastic and nonmetallic article shaping or treating: processes

Direct application of fluid pressure differential to...

Including application of internal fluid pressure to hollow...

264167, 2641171, 26417716, 2642098, 425381, 425465, 425466, 425532, B29C 4730, B29C 4904

Patent

active

054863333

ABSTRACT:
A die for a blow molding machine has at least one circumferential rectangular cutout section contiguous with the die exit in at least the die ring or the mandrel. The rectangular cutout section expands the material flow channel between the die ring and the mandrel to increase the volume flow of material passing through the die exit at the rectangular cutout section. However, the constant length of the rectangular cutout section in a longitudinal direction maintains a constant linear velocity of material flowing through the die exit.

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"Blow Molding Handbook" Technology, Performance, Markets, Economics; The Complete Blow Molding Operation (Dec. 8, 1989); Hanser Publishers; N.Y. (pp. 227-229; 231).

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