Mold for inner gear and mold for cylindrical product with inner

Details Mold for inner gear and mold for cylindrical product with inner Mold for inner gear and mold for cylindrical product with inner

1997-06-18

1999-10-05

Epps, Georgia

Optical: systems and elements

Lens

With variable magnification

264318, 2643288, 249180, G02B 1514, B28B 0720, B28B 0700, B28B 0730

Patent

active

059633808

ABSTRACT:
A mold for a cylindrical product with an inner gear formed by injection molding is disclosed. The mold includes a plurality of sets of first and second inner slide cores each having inner molds with under-cut forming portions. The first and second inner slide cores move in a direction perpendicular to a center line of the inner cores at different velocities.

REFERENCES:
patent: 3888568 (1975-06-01), Norris et al.
patent: 4105390 (1978-08-01), Hehl
patent: 4362291 (1982-12-01), Fuke et al.
patent: 4738401 (1988-04-01), Filicicchia
patent: 4784421 (1988-11-01), Alvite.varies. 294 86.4

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