Injection molding
专利汇可以提供Injection molding专利检索，专利查询，专利分析的服务。并且PURPOSE:To improve the transferring property of a metal mold and to enable the shortening of a molding cycle, by performing at very high speed the packing in the mold put in the state of high vacuum. CONSTITUTION:In a vacuum process, a sprue ejector pin 4 is at a protruding position after a molded article is extruded, and a suction gap is formed by the inner surface of a cavity 3 and a valve 6 when a movable die plate 2 is clamped completely. The suction gap is formed to be large with the sprue ejector pin 4 formed to be thick in diameter, so as to remove a skin layer of the cavity 3. At the same time, the cavity 3 is sealed completely from the air, and with an interval for high vacuum, injection is started. Then the pressure of resin acts on a backing member 9 which blocks up a sprue 5, pushing back the sprue ejector pin 4 to close the valve 6. Therefore the vacuum process is ended at the timing of the start of packing. Thus, the transferring property of the metal mold can be improved, while a molding cycle can be shortened.，下面是Injection molding专利的具体信息内容。
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| 一种预制梁预埋钢板可调承托 | 2020-05-08 | 690 |
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