Method for extrusion-molding laminated parison and apparatus for

Details Method for extrusion-molding laminated parison and apparatus for Method for extrusion-molding laminated parison and apparatus for

1997-10-23

1999-01-05

Nguyen, Khanh P.

Plastic article or earthenware shaping or treating: apparatus

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

Extrusion shaping means

4251331, 425462, 425467, 264515, B29C 4704, B29C 4726

Patent

active

058559264

ABSTRACT:
The present invention provides a laminated-parison extrusion-molding apparatus which includes a head body; a multi-ring structure having a spider provided in the head body; a head core provided inside the multi-ring structure; an outer cylinder member provided surrounding a lower outer periphery of the multi-ring structure, the outer cylinder member constituting a lower portion of the head body; and an annular member provided inside the outer cylinder member, wherein an outer main material is supplied to a flow passage provided between the outer cylinder member and the annular member so as to achieve an outer main material layer having a uniform thickness.

REFERENCES:
patent: 4047868 (1977-09-01), Kudo et al.
patent: 4522775 (1985-06-01), Briggs et al.
patent: 4838778 (1989-06-01), Becker et al.
patent: 5156857 (1992-10-01), Wang et al.
patent: 5297946 (1994-03-01), Yoshida et al.
patent: 5667748 (1997-09-01), Ohta et al.

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