| 摘要 |
PROBLEM TO BE SOLVED: To provide an injection molding machine successful in prevention of defective molding and increase of cooling speed. SOLUTION: The taper of a spool 43 formed on a fixed mold 22 is set to 2.5°, and a resin flow introducing projecting part 36a is formed on the tip of an eject pin 36. By making the taper of the spool 43 to be 2.5°, a molten resin injected into the spool 43 is prevented from being tied up, and it is possible to introduce a flow of the molten resin in a molded article forming part 40 through a runner 42 by the resin flow introducing projecting part 36a, and to surely fill the molten resin into a cavity. In addition, a cooling hole 105 is formed in a conical part 104 of a molded body 100 formed by the spool 43, to achieve a reduction of the resin of a shape of the cooling hole 105 and improvement of a cooling effect caused by enlargement of the surface area. COPYRIGHT: (C)2010,JPO&INPIT |
