Method of molding synthetic resin screws

Details Method of molding synthetic resin screws Method of molding synthetic resin screws

1996-06-13

1998-11-17

Heitbrink, Jill L.

Plastic and nonmetallic article shaping or treating: processes

Mechanical shaping or molding to form or reform shaped article

Shaping against forming surface

2643281, 264334, 249 59, 425330, 425542, 425DIG58, B29C 4533

Patent

active

058371826

ABSTRACT:
A process of molding a synthetic resin screw includes upper mold members 2 and 4, lower mold members 3 and 5, and four sets of slide cores 2a, 4a, 3a and 5a supported by the respective mold members and withdrawable in directions parallel to a parting plane between the upper mold members and the lower mold members.

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patent: 2949636 (1960-08-01), Mastin
patent: 3595301 (1971-07-01), Bauer
patent: 4284124 (1981-08-01), Komatsu et al.
patent: 4588158 (1986-05-01), Mehra
patent: 4633932 (1987-01-01), Ferguson
patent: 4998706 (1991-03-01), Hyll
patent: 5114657 (1992-05-01), Miyajima
patent: 5595702 (1997-01-01), Hiroki et al.

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