1、摘 要 这次的毕业设计的内容是卡通型闹钟后盖的注塑模设计。 注射成形的过程是把塑料原料放入料筒中经过加热熔融塑化成为黏流态的流 体，用柱塞或螺杆的高压推动下，使熔体通过喷嘴以较高压力注入模具的型腔中， 经过冷却、凝固阶段，冷却定形后，然后开模分型得成形塑件，得到塑料制品。 塑料模具注射成形的最大特点是：成形同期短，能一次成形外形复杂、尺寸精 密等的塑料工件；对各种塑料的适应性强；生产效率高，产品质量稳定，易于实现 自动化生产。 设计中主要进行的工作有首先是对塑料进行工艺性能的分析并画出塑件零件 图，以及主流道的设计、模具型腔的分部以及型腔位置的选择，并要画出它们的零 件图，模架的选择和校核、注
2、塑机的选取和校核等，而其中最重要的一部就是对模 具结构中型腔、型芯各径向尺寸和高度尺寸的计算，这些工作都要在查阅有关书籍 后进行，总的设计，最后要画出模具设计的总装配图，并要对模具进行装配和试模， 对其中出现的问题对模具进行改进，直到最后的零件符合设计要求。 关键词： 注射模具 注射成型 型芯型腔计算 AbstractAbstract The graduation design isCartoon type alarm clock back cover injection mold design. The process of injection molding of plastic raw
3、materials into melting plasticizing the viscous flow state of fluid heated in the barrel, using high-pressure plunger or screw driven by the melt injected into the mold cavity at a higher pressure through a nozzle after cooling, the solidification stage, after cooling and setting, and then open the
4、mold type to get into shaped pieces, get plastic products. The plastic mold injection molding is characterized by: forming the same period in short, forming a complex shape, the precise dimensions of the plastic workpiece; adaptable to a variety of plastics; high production efficiency, product quali
5、ty is stable, easy to implement automated production. The design of the main work of plastic analysis of process performance and to draw the parts diagram of plastic parts, as well as owners, the design of the shunt, a division of the mold cavity and the cavity location of choice, and to draw them p
6、arts diagram, lection and verification of the mold, injection molding machine selection and verification, etc., ne of the most important one is the medium-sized cavity of the mold structure, the core radial size and height dimensions of the calculation, the work access to the books, the verallesign and finally to draw the general assembly drawing of the mold design, assembly and test mold and the mold problem on which it appears to improve the mold until the last parts to meet the design requir
