四孔螺盖塑件注射模设计注塑模型

摘要
这次设计的课题对一个指定的塑料零件进行热塑成型工艺分析并完成成型制造的模具结构设计。本次所选塑件属于机壳类型的塑胶制品零件，本次所设计的是一款四孔螺盖塑件，需要四孔螺盖的外侧拥有非常漂亮的上表面有很高的外观表面要求，因为是跟食品相关联的制品，这次考虑用环保级别材料作为这次制品用的。在指定技术要求后，完成分型面、型腔等主要方案的敲定。而由于零件具有安装配合要求，在通过充分考虑模具尺寸大小与生产效益等多方面因素后，最终以填充简易为主要因素拟定采用一模两腔的型腔分布，在浇注方面采用单只分型面的点浇口侧边充料方式进行成型进料点。在模具设计前需要通对塑料件的材料选择以及成型工艺进行分析和注塑成型机的确定，所以本次模具设计选择了比较合适的注塑成型机并对注塑机多个重要参数进行了校核与计算。并对塑料模的塑件分模面进行选择设计。经过多种数据的比较与分析等，从而综合各种因素选择一个最合理的方案。
并将模具所有零件及装配图绘制成UG与CAD电子图档，通过计算机辅助设计软件UG图的绘画，并对塑件的各机构及模架进行了设计绘画，并绘制转化二维CAD装配图及主要的零件图。然后对模具的各种重要的参数进行了一系统的设计与校核，从而完成整个设计。

关键词：塑料四孔螺盖；注塑模具；模具设计；侧抽芯机构；

Abstract
The project of this graduation project is to analyze the thermoforming process of a designated plastic part and complete the mold structure design of the molding and manufacturing. This time, the selected plastic parts belong to the shell type of plastic products. This time, the design is a four hole screw cover plastic part. The outside of the four hole screw cover is required to have a very beautiful upper surface with high surface requirements. Because it is a product related to food, this time, it is considered to use environmental protection grade materials as this product. After the technical requirements are specified, the main schemes such as parting surface and cavity are finalized. After the first mock exam is taken to consider the factors such as the size and the production efficiency, the final mold is mainly made up of two cavity. The casting point is used for the gating side filling method. Before the mold design, it is necessary to analyze the material selection and molding process of plastic parts and determine the injection molding machine. Therefore, this mold design selects a more suitable injection molding machine and checks and calculates several important parameters of the injection molding machine. The parting surface of the plastic mold is selected and designed. Through the comparison and analysis of many kinds of data, we can choose the most reasonable scheme by integrating various factors.
All the parts and assembly drawings of the mold are drawn into UG and CAD electronic files. The drawing of UG drawing is done by CAD software. The design drawing of the mechanism and mold base of the plastic part is made, and the two-dimensional CAD assembly drawing and the main part drawing are drawn. Then, the important parameters of the die are designed and checked in a systematic way to complete the whole design.
Key Words: plastic four hole screw cap; injection mold; mold design; side core pulling mechanism;

目录
摘要I
Abstract II
1前言1
1.1塑料简介1
1.2注塑成型及注塑模1
2材料分析4
2.1塑料的基本特性4
2.2塑件材料成型性能5
2.3塑件材料的主要用途5
3塑件的工艺分析7
3.1塑料件的外形设计7
3.2塑料件的表面粗糙度7
3.3塑料件的体积与质量8
3.4注射机的选择与校核8
3.4.1预估整模具成型需求的体积8
3.4.1选定模具恰用的注射机10
4成型工艺方案及模具结构的分析和确定11
4.1注射成型工艺过程分析11
4.2浇口种类的确定12
4.3型腔的数量选择12
4.4分型面的设计12
4.5型腔的布局13
5注射模具结构设计14
5.1浇注系统的设计14
5.1.1浇注系统组成14
5.1.2设计浇注系统的原则14
5.1.3主流道的设计14
5.1.4分流道的设计16
5.1.5浇口的设计17
5.1.6冷料穴的设计19
5.2注射模成型零部件的设计20
5.2.1成型零部件结构设计20
5.3成型零部件工作尺寸的计算21
5.3.1成型凹模尺寸计算校核21
5.3.2成型凸模尺寸计算校核22
5.4排气结构设计23
5.5脱模机构的设计23
5.5.1脱模机构的选用原则23
5.5.2脱模机构类型的选择24
5.5.3标准圆形推杆机构具体设计24
5.6注射模温度调节系统25
5.6.1温度调节对塑件质量的影响25
5.6.2冷却系统之设计规则26
5.7模架及标准件的选用27
5.8侧向抽芯机构类型选择28
5.8.1滑块的设计29
5.8.2导滑槽设计29
5.8.3滑块定位装置设计30
5.8.4楔紧块设计30
5.8.5斜导柱抽芯机构的结构形式30
5.8.6滑块的抽芯机构设计30
6注塑机与模具安装校核32
6.1注射量的校核32
6.2注射机材料成型压力校核32
6.3塑料件在分型面上的投影面积与锁模力的校核32
6.4模具与注塑机安装模具部分尺寸校核33
6.5模具运动的行程尺寸校核34
7模具材料的选用36
总结37
致谢38
参考文献39
附录A 40
附录B 41

1前言
模具是国民经济生产的一项重要的工具，在各行各业的生产过程中，模具的使用与制造也日益受到了人们的关注。在轿车，数码，家具，手机等消耗品等行业中，60%至80%的零部件的生产需要用到模具的成型。模具的使用可以使生产出来的零件具有高度一致性，高精度，容易加工等一系列优