双侧面孔方盒塑料模具设计

 2023-01-12 08:01

论文总字数:30460字

摘 要

本次毕业设计选择的题目是一个针对双侧面孔方盒塑件的注塑模具设计,在三维方面是基于UG三维建模软件对双侧面孔方盒支承架塑件塑料件进行三维软件建模,并需要完成对这个该塑料件的原始结构分析,通过分板及了解可以知道的情况这个塑件内部结构及塑件外形相对比较简单,整体呈壳体零件,壁厚平均分布相对合理。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,本次设计拟定采用一模二腔的型腔分布,在浇注方面采用了侧浇口进料的两板模方式。注塑模具是一种以特定的型腔、型芯等结构形式让塑胶原料成型的一种新型生产工业,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。

在模具设计中,主要对模具分型面的设计,模具浇注系统的设计,再选择浇注方式及模具的浇注主流道、模具的浇注分流道、模具的浇注浇口和模具的浇注冷料穴等多个设计。然后还需要对模具重要成型零部件设计和尺寸计算,在计算分析后确定了塑胶模具的型腔深度,塑胶模具的型腔高度,塑胶模具的型腔壁厚,塑胶模具的型芯高度。并对是塑胶模具的高温系统的设计和验算,通过分析后选择了循环水的冷却方式等,同时还需要进行塑件推出系统机构的设计,模具合模导向系统的设计还有需要一些模具附属机构设计等。在一系列的模具主要的分支机构设计完成后,最终确定了模架尺寸和形式为一模二腔的塑料模具结构,侧浇口浇注的模架。并将模具所有零件及装配图绘制成CAD电子图档,通过计算机辅助设计软件CAD图的绘画,能让我们更全面的掌握了CAD软件操作与使用技巧。

关键词:模具设计;注射成型; 塑件工艺分析;塑料模具:

Design of plastic injection mold with square box on both sides

Abstract

The topic chosen for this graduation project is an injection mold design for the two-side empty square box plastic parts. In the three-dimensional aspect, the three-dimensional software modeling of the two-side Empty Square box supporting frame plastic parts is based on the Ug three-dimensional modeling software, it is necessary to finish the analysis of the original structure of the plastic part. The internal structure and the shape of the plastic part are relatively simple by dividing the plate and understanding the situation. After fully considering the size of the mold and the production efficiency, the design adopts the cavity distribution of one mold and two cavities, and adopts the two-plate feeding mode of side gate in pouring. The injection mold is a new type of production industry, which takes the plastic raw material into shape with the special cavity and core structure, it is necessary to analyze the material selection and molding process of plastic parts and determine the injection molding machine before the mold design, therefore, the mold design to choose a more suitable injection molding machine and injection molding machine several important parameters were checked and calculated. And the parting surface of the plastic part of the plastic mold is designed. After a variety of data comparison and analysis, so as to synthesize a variety of factors to choose the most reasonable program. In the mold design, mainly to mold parting surface design, mold gating system design, then choose the pouring mode and the main runner of the mould, the runner of the mould, the pouring gate of the mould and the pouring cavity of the mould. Then it is necessary to design and calculate the important parts of the mould. After the calculation and analysis, the depth of the mould cavity, the height of the mould cavity, the thickness of the mould cavity wall and the height of the mould core are determined. The design and checking of the high temperature system of the plastic mould, the cooling method of the circulating water and so on are selected after the analysis, at the same time, the design of the mechanism of the plastic part ejection system is also needed, the design of the guiding system of mould closing also needs some mould subsidiary mechanism design and so on. After the design of a series of main branches of the mould, the size and form of the mould base are determined, which is one mould with two cavities, and the mould base is poured by side gate. And all parts of the mold and assembly drawing into the CAD electronic drawings, through the drawing of the computer-aided design software CAD drawings, can let us more comprehensive grasp the CAD software operation and use skills.

Keywords: Mold Design; injection molding; Plastic Part Process Analysis; Plastic Mold:

目 录

摘 要 I

Abstract II

第一章 引言 1

1.1 塑料简述 1

1.2 注塑模成型工艺 2

1.3 注塑模具的现状与发展与课题的意义 3

第二章 塑件的结构分析 4

2.1 塑件二维图 4

2.2 塑件结构工艺性分析 4

2.3 塑件材料的成型工艺分析 6

2.4 塑件质量与体积分析 7

第三章 注射机选型与校核 8

3.1 注塑机的注射量计算 8

3.1.1 注塑时所需要的体积计算 8

3.2 注塑机选择 8

第四章 浇注系统的设计 10

4.1 分型面选择与设计 10

4.2 型腔数目的确定 11

4.3 主流道的设计 12

4.4 模具分流道的设计 13

4.5 模具浇口设计 14

4.6 模具冷料穴设计 14

4.7 模具排气方式设计 15

第五章 模具调温系统的设计 16

5.1 温度调节系统的设计要点 16

5.2 冷却系统的设计 16

5.3 冷却时间的确定 17

第六章 成型零部件设计 18

6.1 模具成型中心距尺寸计算 19

6.2模具型芯尺寸的计算结果 20

6.3模具型腔尺寸的计算结果 21

第七章 注塑模具机构设计与校核 23

7.1脱模机构的设计 23

7.2侧向抽芯滑块的设计 24

7.2.1 滑块导滑槽设计 24

7.2.2抽芯机构的结构形式 25

7.3侧向抽芯机构参数计算与校核 25

7.3.1 抽芯距S"的计算 25

7.3.2 斜导柱倾斜角α设计 25

7.3.3斜导柱直径计算 25

7.4 合模导向机构的设计 26

7.5型腔数量校核 27

7.6 锁模力的校核 27

7.7注射压力的校核 28

7.8 最大注射量校核 28

7.9 注塑机的开模行的校核 28

7.10 模架的选择 29

7.11模具工作原理说明 30

第八章 模流分析辅助 33

8.1 塑件工艺性分析 33

8.2 分析前处理 34

8.2.1 项目创建和模型导入 34

8.3 网格的划分和修改 34

8.4 分析处理项目 36

8.4.1 进料匹配性分析,对比并锁定浇口位置 36

8.4.2 软件推荐的位置与结合模具所选定位置的进料对比 37

8.4.3 确定分析序列为:冷却 填充 保压 翘曲 38

8.5 材料的选择 38

8.6 注射时成型参数设定,具体选定数据如下: 39

8.7 所得分析过程日志记录其对成型腔体内部位各项温度指标提要: 40

8.7.1填充射料分析 40

8.7.2 速度/压力切换时的压力 41

8.7.3 流动熔接痕 41

8.7.4 气穴 42

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