塑料模具的设计专题报告.docVIP

专题 塑料模具的设计 摘 要 塑料注射成形所用的模具称为注射成形模具，简称注射模。塑料的注射成形过程，是借助于注射机内的螺杆或柱塞的推力，将已塑化的塑料熔体以一定的压力和速率注射到闭合的模具型腔内，经冷却、固化、定型后开模而获得制品。注射成形在整个塑料制品生产中占有十分重要的地位。除少数几种塑料外，几乎所有的塑料都可以采用注射成形的方法来生产制品。据估计，注射成形的制品约占所有模塑制品总产量的三分之一；注射模约占塑料成形模具数量的二分之一以上。 本文论述了活动圈零件的注射模具设计，该零件采用的材料为POM（聚甲醛），该材料的综合性能良好，强度、刚度高，抗冲击、疲劳、蠕变性能较好，减摩耐磨性好，吸水性小，尺寸稳定性好，但热稳定性差，易燃烧，长期在大气中曝晒会老化。 关键字：注射模 聚甲醛 浇注 Abstract The plastics injects to take shape the molding tool use to be called to inject to take shape a molding tool, the brief name injects a mold.The plastics injects to take shape process, is ask for help from to inject machine inside of the pole or pillar fill of push dint, will already the plastics body of the petrochemistry is inject with the certain pressure and the velocity to shut to match of the molding tool type inside, after cool off, solidly turn, already set opens a mold but acquires ware.Inject to take shape in the whole plastics the ware the production to occupy a very important position.In addition to a handful of few plasticses, almost all plasticses can adopt to inject to take shape of the method future life produce ware.According to the estimate of, the ware that injects to take shape shares all 1/3s that the molds product a total yield about;Inject a mold to share 1/2 that the plastics takes shape the molding tool quantity about above. This text discussed a movable turn spare parts to inject the molding tool design, the material of that spare parts adoption for POM(gather a formaldehyde), the comprehensive function of that material is good, strength,just the degree was high, the anti- pound at,tired,the changed function better, reduced to bear to whet sex good, absorb water sex small, the size stability good, but the hot stability was bad, easily burnable, the long-term insolate and will be aging in the atmosphere. Key word:Inject a mold gather a formaldehyde sprinkle to note 前 言 塑料模是模具的一种，它却站据非常重要的位置。 众知，当今社会正处于第五次工业革命浪潮，人们正步入信息时代、塑料工业正是这一时代的生力军，是这个时代最有代表性的特征之一。 1．塑料模功能 现代塑料制品生产中，合理的加工工