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3.顶出系统 3.1概况注射成形塑料都具有一定最的收缩,即在冷却条件下的体积比热态时多少要小些。如果零件有精度要求,则确定模腔尺寸时必须考虑到因收缩引起的偏差。收缩也会造成注塑件紧紧包住型芯的现象,这是因为注塑件通常是存冷却以后顶出的。可见,为了将注塑件顶出,需要采取一些特殊的措施。这些措施中,首先包括仔细抛光所有与熔融塑料接触的模具表面以及退模方向上的某些
3. Eject system 3.1 Overview Injection molding plastics have some of the most contraction, that is, the volume of the cooling conditions than the hot state to be somewhat smaller. If the part has accuracy requirements, the dimensions of the cavity must be taken into consideration due to shrinkage. Shrinkage can also cause the injection molded parts to tightly encase the core, since the injection molded parts are usually ejected after cooling. Visible, in order to eject the injection, need to take some special measures. These measures include first carefully polishing all the mold surfaces in contact with the molten plastic and some of the mold release direction