三通管模具设计毕业设计.doc

PVC三通管模具设计 【摘要】 本设计介绍了注射成型的基本原理。具体的设计内容是从零件的工艺分析开始的，根据工艺要求来确定设计的大体思路。开始是从零件的材料选择，接下是成型参数、密度、收缩率的确定，模具种类与模具设计的关系、塑件的尺寸精度与结构、注射机的选择、模具设计有关尺寸的计算（包括模具腔型芯的计算及其公差的确定），为保了保证塑件表面质量采用浇口。由于塑件的工艺性能要求注塑模中有冷却系统注射成形是把塑料原料放入料筒中经过加热熔化，使之成为高黏度的流体，用柱塞或螺杆作为加压工具，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，后从模具中脱出，成为塑料制品。 塑件注射模模具设计工艺性能The design on the basic principles of injection molding and injection mold design the general steps. Is the design of specific components from the beginning of the process, according to determine the design requirements of the general ideas. Parts from the beginning of the material selection, took over the molding parameters, density, the rate of contraction identified, mold and die design of the type, size precision plastic parts with structure, and the choice of injection machine, mold design of the size of terms (including mold cavity to the core of the determination and tolerance), in order to protect the plastic surface quality assurance center gate. As the pieces of plastic injection mold process performance requirements in the cooling system is the plastic injection molding raw materials Add in the Liaodong heating melting, so that they can become high-viscosity fluid, used as a plunger or screw compression tools to melt through nozzle to the high pressure injection mold cavity, after cooling, solidification stage, and then emerge from the mold, a plastic products. Key words: Plastic parts, injection mould, mold design, process performance 目录 1、塑件成型工艺性分析 1 2、模具的结构式 3 2.1成型工艺性分析 3 2.2PVC塑料的成型特性 3 2.3PVC塑料的用途， 4 2.4PVC塑料的注射工艺参数 4 2.5型面位置的确定 5 2.6定型腔数量和排列方式 5 2.7具结构形式的确定