底座盖注塑模具毕业设计.doc

底座盖注塑模具毕业设计

摘要

本课题主要是针对底座盖的模具设计, 底座盖具有重量轻、易清洁、耐腐蚀老化、强度高、使用寿命长，制作方便、价格低廉等特点。通过对塑件进行工艺的分析和比较,最终设计出一副注塑模。该课题从产品结构工艺性，具体模具结构出发，对模具的浇注系统、模具成型部分的结构、顶出系统、冷却系统、注塑机的选择及有关参数的校核、都有详细的设计，同时并简单的编制了模具的加工工艺。通过整个设计过程表明该模具能够达到此塑件所要求的加工工艺
塑料制品具有原料来源丰富,价格低廉,性能优良等特点。它在电脑、手机、汽车、电机、电器、仪器仪表、家电和通讯产品制造中具有不可替代的作用，应用极其广泛。注射成形是成形热塑件的主要方法，因此应用范围很广。
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，而后从模具中脱出，成为塑料制品。
依据产品的数量和塑料的工艺性能确定塑件采用注射成形法生产。该产品设计为大批量生产，故设计的模具要有较高的注塑效率，浇注系统要能够自动脱模，此外为保证塑件表面质量采用点浇口，因此选用单分型面注射模，点浇口自动脱模结构。模具的型腔采用一模八腔平衡布置，浇注系统采用点浇口成形，推出形式为十六推杆推出机构完成塑件的推出。由于塑件的工艺性能要求注塑模中有冷却系统，因此在模具设计中也进行了设计。本次的设计中不仅参考了大量纸质文献，而且在互联网上查阅资料，设计过程比较完整。
关键词  单分型面注射模具 底座盖  硬聚氯

ABSTRACT

The main topic is covered in mold design for the base, the base covered with a light weight, easy to clean, corrosion-resistant aging, high strength, long service life, making easy, low prices and so on. Through the process of plastic parts for analysis and comparison, the final design of an injection mold. Process from the product structure of the project, specific mold structure starting on the casting mold system, mold forming part of the structure, the top out of the system, cooling system, the choice of injection molding machines and related parameters of the check, there are detailed design, while and simple preparation of the mold process. Through the entire design process that can be achieved in the mold plastic parts required in this process
  Rich source of raw materials, plastic products, low price and excellent performance characteristics. It is in computers, mobile phones, cars, motors, electrical, instrumentation, home appliances and communication products manufacturer has an irreplaceable role, the application is extremely broad. Pieces of molding thermoplastic injection molding is the main method, so a wide range of applications.
  Injection molding is the plastic material into the barrel through the heating and melting, making the high viscosity of the fluid pressure with a plunger or a screw as a tool to melt at a higher pressure through the nozzle into the mold cavity, after cooling, freezing stage, then emerge from the mold, a plastic products.
  Based on the volume and determine the process performance of plastic injection molding method using plastic parts production. The product is designed for mass production, so the design of the mold have a high Zhusu efficiency, feed system to be able to automatic ejection, in addition to ensure the quality of plastic surface using point gate, so we choose a single sub surface injection mold, points gate automatic ejection structure. Mold cavity eight-cavity mold with a balanced layout, gating system using point gate forming, introduced in the form of introduction agencies to complete sixteen putting the introduction of plastic parts. As performance requirements of plastic injection molding process in the cooling system, so also in the mold design to design. The only reference to the design of a large number of paper documents, and access to information on the Internet, the design process is complete.

Key words ：Single parting injection mould   base cover    Hard PVC

目   录

前 言 ……………………………………………………………………I

中文摘要 ………………………………………………………………Ⅱ

英文摘要 ………………………………………………………………III

第一章  对塑料成型模具的认识 …………………………………………1

1.1模具在加工工业中的地位 ……………………………………………1
1.2 模具的发展趋势 …………………………………………………1
1.3 设计在学习模具制造中的作用 ……………………………………2

第二章  原始资料分析 …………………………………………………3
 
2.1 塑件的工艺分析  ………………………………………………3
  2.2 底座盖原料（PC）的成型特性与工艺参数 ………………………3
2.3  塑件的结构工艺性  ……………………………………………4
2.4  注射机的选择……………………………………………………5

第三章  分型面及浇注系统的设计 ………………………………………7

3.1  分型面的选择 …………………………………………………7
  3.2  浇注系统的设计 ………………………………………………8
  
第四章 模具设计方案论证 ……………………………………………14

4.1   型腔的布置  …………………………………………………14.
4.2   成型零件的结构确定 …………………………………………14
4.3   导向定位机构设计……………………………………………14
4.4   推出机构的设计………………………………………………15
4.5   冷却系统设计…………………………………………………15
4.6   模具加热系统的设计 …………………………………………16
4.7   温度调节系统的设 ……………………………………………16

第五章 主要零部件的设计计算  ………………………………………18
5.1   成型零件的成型尺寸 ……………………………………………18
5.2   模具型腔壁厚的确定 ……………………………………………19
5.3   推出机构的设计…………………………………………………19
5.4   标准模架的确定………………………………………………19

第六章 成型设备的校核计算  …………………………………………21
6.1  锁模力的校核 …………………………………………………21
6.2  安装尺寸的校核 ………………………………………………21
6.3  推出机构的校核 ………………………………………………21
6.4  开模行程的校核 ………………………………………………21

第七章  模 具 的 装 配………………………………………………22

7.1  模具的装配顺序 ………………………………………………22
7.2  模具的维护 ……………………………………………………23

设计总结 ……………………………………………………………24

附录：成型零件图  ……………………………………………………25
型芯三维视图……………………………………………………30
      装配图 …………………………………………………………31
致谢  …………………………………………………………………34

参考文献   ……………………………………………………………35