Annular die for a lamination product

Details Annular die for a lamination product Annular die for a lamination product

1990-08-16

1991-12-31

Weston, Caleb

Plastic article or earthenware shaping or treating: apparatus

Means feeding fluent stock from plural sources to common...

Extrusion shaping means

425462, 425463, 425467, 156500, B30B 1122

Patent

active

050767763

ABSTRACT:
An annular die for a lamination product comprises a center core portion 2, four circular-plate-like rings 1 arranged around the center core portion in the vertical direction so as to form a resin passage, which is communicated with a die lip 7, at the inner surface of the circular-plate-like rings, wherein openings for feeding resin are formed so as to open at the outer circumferential portions of mating surfaces 11 of the circular-plate-like rings; manifolds 5 are formed in either one of the mating surfaces of the rings so as to extend from the opening 4 in a spiral form, the depth of the manifolds being gradually decreased toward the inside of the mating surfaces; and a final resin-flowing area 51 is formed to communicate the manifolds 5 with the resin passage.

REFERENCES:
patent: 3308508 (1967-03-01), Schrenk
patent: 3337914 (1967-08-01), Corbett
patent: 3809515 (1974-05-01), Farrell
patent: 4167383 (1979-09-01), Murakami et al.
patent: 4182603 (1980-01-01), Knittel
patent: 4185954 (1980-01-01), Murakami et al.
patent: 4285656 (1981-08-01), Herrington
patent: 4298325 (1981-11-01), Cole
patent: 4798526 (1989-01-01), Briggs et al.
Patent Abstracts of Japan, vol. 5, No. 72 (M-68)[744], 14th May, 1981; & JP-A-56 24 133 (Asahi Dow K.K.) 07-08-1979.

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