Injection molding apparatus and injection molding method

Details Injection molding apparatus and injection molding method Injection molding apparatus and injection molding method

2007-12-04

2007-12-04

Huson, Monica A (Department: 1732)

Plastic and nonmetallic article shaping or treating: processes

Mechanical shaping or molding to form or reform shaped article

Shaping against forming surface

C425S568000, C425S569000

Reexamination Certificate

active

10485387

ABSTRACT:
A space12is formed at a tip portion of a nozzle1so as to decrease a thermal transfer of the nozzle1. Alternatively, a center portion of one of a semi-spherically protruded surface of the tip portion of the nozzle1and a semi-spherically recessed surface of a sprue bush protrudes so that the radius of curvature of one semi-spherical surface is the same as the radius of curvature of the other semi-spherical surface. As a result, since the nozzle1and the sprue bush2are surface-contacted, heat of the tip portion of the nozzle1absorbed to the sprue bush2is increased. Thus, the temperature of the tip portion of the nozzle1can be lowered easily. After the resin material injected into the molding cavity11is cooled, when the sprue portion is removed from the fixed die, a tip portion of a rod-shaped protrusion portion of the sprue can be properly cut.

REFERENCES:
patent: 2928125 (1960-03-01), Smucker et al.
patent: 54-116565 (1979-08-01), None
patent: 3-16217 (1991-02-01), None
patent: 6-198680 (1994-07-01), None
patent: 11-48286 (1999-02-01), None
patent: 2000-117776 (2000-04-01), None
Translation—JP 11-048286 (Machine).
International Search Report dated Feb. 9, 2003.
Japanese Office Action; Application No. 2002-172619; Dated: Feb. 6, 2007.

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