Method of molding golf balls using an injection mold

Details Method of molding golf balls using an injection mold Method of molding golf balls using an injection mold

Filed on

1997-05-23

Date issued

1998-10-27

Examiner

Nguyen, Khanh P.

Patent Class

Plastic and nonmetallic article shaping or treating: processes

SubClass

Mechanical shaping or molding to form or reform shaped article

SubSubClass

To produce composite, plural part or multilayered article

Other Related Categories

2642711, 2643288, 2643289, 264296, 425116, 425117, 425570, 425573, B29C 4514, B29C 4527

Type

Patent

Status

active

Patent number

058274669

Description

ABSTRACT:
A method of molding golf balls using an injection mold. The golf ball includes a plurality of dimples closely distributed on the surface of the ball. The injection mold for golf balls including a pair of separable mold segments (12, 12) defining a spherical cavity (22) when mated along a parting line (PL). A plurality of hollow tubular gates (20) are disposed in the surfaces of the mold segments to be mated along the parting line and in fluid communication with the cavity. Each gate (20) has a non-circular cross section at its outlet. Opposed portions (20-1, 20-2) of the gate cross section separated by the parting line (PL) have an equal area. A stock material is injected into the cavity through the gates to mold a golf ball.

REFERENCES:
patent: 5066449 (1991-11-01), Kato et al.
patent: 5112556 (1992-05-01), Miller
patent: 5122046 (1992-06-01), Lavallee et al.
patent: 5147657 (1992-09-01), Giza
patent: 5407341 (1995-04-01), Endo et al.
patent: 5458473 (1995-10-01), Banji

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