Molding tool

Details Molding tool Molding tool

1990-11-06

1991-10-29

Woo, Jay H.

Plastic article or earthenware shaping or treating: apparatus

Distinct means to feed, support or manipulate preform stock...

Female mold type means

249 91, 249 97, 425DIG29, 425DIG38, B29C 3324, B29C 4120

Patent

active

050611658

ABSTRACT:
A tool for holding threaded inserts in a rotational mold includes a stud which projects within the mold cavity and which has a diameter substantially equal to the minor diameter of the threads of the insert. A spring loaded detent on the stud is received by the internal threads of the insert for holding the insert firmly against the inner wall of the mold yet permitting simple removal of the molded part. A retractor mechanism for using the tool with threaded inserts placed across the axis of removal of the molded part, is also taught.

REFERENCES:
patent: 2370487 (1943-03-01), Poutie
patent: 3685782 (1972-08-01), Kowell
patent: 3685783 (1972-08-01), Hilson
patent: 3924493 (1975-12-01), Penner
patent: 4053134 (1977-10-01), Peacock
patent: 4167379 (1979-09-01), Liautand
patent: 4558620 (1985-12-01), Wallis
Modern Plastics Encyclopedia 1989, "Rotational Molding", pp. 296 and 301.
"Rotospeed Rotational Molding Machines", Ferry Industries, Inc. 12 pages.
Catalog page "Faspin Model C", Aerofast, Inc.
Camloc Fasteners, Master Catalog No. 89, p. E12.
Two photographs marked Applicant's Exhibit 4a and 4b showing rotational mold and molded part.

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