Injection molding method and injection molding apparatus

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

2011-05-03

2011-05-03

Wyrozebski, Kat (Department: 1791)

Plastic and nonmetallic article shaping or treating: processes

Mechanical shaping or molding to form or reform shaped article

Shaping against forming surface

C264S040300, C264S328100, C264S500000

Reexamination Certificate

active

07935293

ABSTRACT:
An injection molding apparatus includes a forming mold provided with a gas inlet through which a gas is introduced into an area between a rear molding surface in a cavity and a resin material inside the cavity. A plurality of the gas inlets is provided along a passage direction of the resin material in the cavity. In injection molding the resin molded article, a molten resin material is introduced into the cavity from a resin inlet and, when filling the inside of the cavity with the resin material, the introduction of the gas is sequentially started, beginning with a gas inlet provided in an area inside the cavity which is first filled with the resin material, thereby sequentially pressing the relevant resin material against a front molding surface of the cavity.

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Notification of Reason for Refusal issued from the Japanese Patent Office dated Jul. 16, 2010 in the corresponding Japanese patent application No. 2005-345555 (a copy and English translation thereof).
Notification of Reason for Refusal issued from the Japanese Patent Office dated Jul. 16, 2010 in the corresponding Japanese patent application No. 2005-345556 (a copy and English translation thereof).

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