Injection spin molding process

Details Injection spin molding process Injection spin molding process

1996-07-18

1998-05-19

Derrington, James

Plastic and nonmetallic article shaping or treating: processes

Mechanical shaping or molding to form or reform shaped article

Shaping against forming surface

26432812, B29C 4104, B29C 4500

Patent

active

057531595

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: 3907952 (1975-09-01), Cleereman
patent: 4288478 (1981-09-01), Kinoshita

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