Annular die for a lamination product
AssigneeMitsubishi Plastics Industries Limited
InventorsTakao Yamada, Yoshiaki Higuchi
Life of this patent
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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.
Claims2
An annular die for a lamination product which comprises:
- a center core portion 2, at least two circular-plate-like ring bodies 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 ring bodies, wherein
- an opening 4 for feeding resin is formed so as to open at the outer circumferential portion of mating surfaces 11 of the circular-plate-like ring bodies;
- a manifold 5 is formed in either one of the mating surfaces of the ring bodies so as to extend from the opening 4 in a spiral form, the depth of the manifold 5 being gradually decreased toward the inside of the mating surfaces;
- and a final resin-flowing area 51 is formed to communicate the manifold 5 with the resin passage.
Dependencies are inferred from the claim text.