Injection spin molding process and articles made therewith

Details Injection spin molding process and articles made therewith Injection spin molding process and articles made therewith

1995-04-26

1996-11-05

Robinson, Ellis

Stock material or miscellaneous articles

Hollow or container type article

Polymer or resin containing

428 3691, 428215, 428910, 138137, 138141, 138DIG7, 128767, 604187, 26432812, B32B 700, F16L 912

Patent

active

055715834

ABSTRACT:
A molding process includes flowing a polymer melt into the cavity of a mold which includes a core pin. After the mold is filled and skin layers of solidified polymer have formed adjacent the mold wall and core pin wall, the core pin is spun transversely to the direction of polymer melt flow. The invention includes hollow articles of improved mechanical properties made by the process.

REFERENCES:
patent: 3988401 (1976-10-01), Kasting et al.
patent: 5242721 (1993-09-01), Oonuki et al.
S. Middleman, Chapter 11, Injection Molding, Fundamentals of Polymer Processing, 260-273, McGraw-Hill.

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