摘  要

模具工业是国民经济的基础工业，是国际上公认的关键行业。模具生产技术水平的高低是衡量一个国家产品制造水平高低的重要标志，它在很大程度上决定着产品的质量，效益和新产品的开发能力。振兴和发展我国的模具工业，正日益受到人们的关注。由于轴类零件在机械制造中有非常重要的地位，塑件轴模具的设计就显得很有必要。

本次设计根据给定塑件轴的尺寸和结构要求，对塑件轴的分开型面、材质的收缩率，计算零件的注射（塑）量与注射压力,选取适用的注射（塑）机。校核: 注射（塑）量与注射压力和开模行程。确定塑件轴模具结构;计算确定塑件轴的注射（塑）量与成型穴数。塑件轴模具的型芯（凸模）与型腔（凹模）的结构设计。塑件轴模具的型芯（凸模）与型腔（凹模）的尺寸设计。塑件轴模具的浇注系统设计。塑件轴模具的冷却系统设计。塑件轴模具卸料及顶出装置（或机构）设计。设计说明中应展示图1塑件轴注射模具设计方案的对比与选择，模具型芯（凸模）与型腔（凹模）的工作尺寸的计算。主要模具零件（如型芯（凸模）与型腔（凹模）等）的尺寸计算过程及计算步骤等。

关键词：塑件轴；注射模具；加工工艺；零件图；CAD

Abstract

The mould industry is the basic industry of the national economy and the key industry recognized internationally. The level of mould production technology is an important symbol to measure the level of product manufacturing in a country，which to a great extent determines the quality，benefit and development ability of new products. Revitalizing and developing the mould industry of our country is getting more and more attention. Because the shaft parts have a very important position in the mechanical manufacture，it is very necessary to design the shaft mould of plastic parts.

This design according to the given plastic parts shaft size and structural requirements，the plastic parts shaft of the separate surface，material shrinkage，calculate the injection (plastic) of the parts and injection pressure，select the appropriate injection (plastic) machine. check: injection (plastic) amount with injection pressure and open mold stroke. Determine the mold structure of the plastic shaft；calculate and determine the injection (plastic) of the plastic shaft and the number of molding holes. structural design of the core (convex die) and cavity (concave die) of the plastic part shaft die. The size design of the core (convex die) and cavity (concave die) of the plastic shaft die. gating system design of plastic parts shaft mould. cooling system design of plastic parts shaft die. Shaft die of plastic parts Material and ejection device (or mechanism) design. The design instructions should show the comparison and selection of the design scheme of the plastic parts shaft injection mold，and the calculation of the working size of the die core (punch) and the cavity (concave mold). The calculation process and calculation steps of the dimensions of the main die parts (such as the core (punch) and cavity (concave die) etc.).

Keywords: plastic shaft；injection mould；processing technology；part drawing；CAD.

目录

1绪论 1

1.1选题背景及意义 1

1.2发展现状 1

1.3发展趋势 3

1.4研究目的和内容 3

2塑件轴工艺性分析 5

2.1塑件组成工艺分析 5

2.2塑件的结构和尺寸精度 6

2.2.1 塑件的结构分析 6

2.2.2塑件尺寸精度的分析 6

2.2.3表面质量分析 6

2.3塑件的体积重量 7

2.4塑件的注射工艺参数的确定 8

3型腔数的确定及浇注系统设计 10

3.1分型面的选择 10

3.2型腔数的确定 11

3.3确定型腔的排列方式 11

3.4浇注系统的设计 11

3.4.1主流道的设计 11

3.4.2分流道的设计 12

3.4.3浇口的设计 12

4侧向分型与抽芯机构设计 14

4.1斜导柱的设计 14

4.1.1斜导柱的基本形式 14

4.1.2 斜导柱倾斜角的选择 15

4.1.3 斜导柱长度计算 15

4.1.4斜导柱直径的计算 16

4.2侧滑块的设计 17

4.3导滑槽的设计 17

4.4锲紧块的设计 17

5模具成型零件的设计 18

5.1凹模结构形式的选择 18

5.2凹模及型芯工作尺寸的计算 18

5.3型腔侧壁厚度的计算 19

6推出机构的设计与计算 21

6.1推出机构设计的原则 21

6.2脱模力的计算 21

6.3推杆直径的计算 22

7注射机与模具各参数的校核 23

7.1注射量的校核 23

7.2锁模力的校核 23

7.3安装参数的校核 23

总  结 24

致  谢 25

参考文献 26