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纺纱筒是气纺机中一个绕线零件,每台整机装168个,并且属于消耗性零件,生产批量很大,所以要求模具具有较好的机动性和连续性.制件见图1,制件材料为酚醛塑料,制件重量550克,该制件的特点是模具型腔深,表面面积大,制成模具开启和制件脱芯困难,制件密度不易保证.采用100吨压力机,上下台面最大开距890mm并有下顶出装置.一、设置加料室是为了使模具在压制时,阴模中向外溢流的塑料得到控制,一方面节约用料,另一方面使零件的密度得到保证,并且提高制件尺寸精度.除此之外,后面还将提到
Spinning drum is a winding machine parts, each machine installed 168, and is a consumable parts, production volume is large, so the mold has good flexibility and continuity. Parts shown in Figure 1 , The parts made of phenolic plastic, the weight of 550 grams of the workpiece, the workpiece is characterized by mold cavity deep, large surface area, made of mold opening and workpiece de-core difficulties, the workpiece density is not easy to guarantee the use of 100 tons of pressure Machine, the maximum distance from the top and bottom of the table 890mm and the top of the next device. First, set the feeding chamber is to make the mold in the suppression of negative overflow in the plastic mold under control, on the one hand to save materials, on the other hand the parts The density is guaranteed, and to improve the dimensional accuracy of parts. In addition, the following will be mentioned