电器旋钮塑料模具设计

论文总字数：20562字

摘 要

现在注塑模具发展较快，再加上国内技术日渐娴熟以及新技术的引入，注塑模具将会受到更多人关注。电器旋钮在淋水的环境使用可预防触电,面板密封设计防止水液及灰尘进入开关内部，保证了机器设备的安全运行,保证了人身安全，常采用注塑成型。本课题是对电器旋扭进行注塑模具设计，使用UG、CAD 软件画出具体图样,确定公差尺寸及精度等级，随后对塑料材料进行对比分析，选择了ABS材料。使用Moldflow进行了电器旋钮模具的模流分析，确定了最佳浇口位置以及填充时间工艺参数，为模具设计提供了参考。本次塑件选择单分型面注射模具，根据塑件设计结构以及要大批量生产设计为一模二腔，采用点浇口填充。最后设计了电器旋钮模具，绘制了电器旋钮总装图及零件图。

关键词：注塑成型；电器旋扭；分型面；设计结构

Design of injection molding for the outer cover of the floor sweeping robot

Abstract

Now the rapid development of injection mold, coupled with domestic technology increasingly skilled and the introduction of new technology, injection mold will be paid more attention to. Electric knobs can prevent electric shock when used in the environment of water dousing. The panel seal design prevents water liquid and dust from entering the inside of the switch to ensure the safe operation of the machine and equipment and the personal safety. Injection molding is often used. This topic is to design the injection mold for the electrical twisting, use UG, CAD software to draw the specific pattern, determine the tolerance size and precision level, then compare and analyze the plastic material, choose ABS material. Moldflow was used to analyze the Moldflow of electric knob, and the optimum gate position and filling time were determined, which provided a reference for mold design. The plastic parts choose a single parting surface injection mold, according to the plastic parts design structure and to mass production design for a mold two cavity, using the point gate filling. At last, the mould of electrical knob is designed, and the assembly drawing and spare parts drawing of electrical knob are drawn.

Keywords:Injection mould; Electric vortex; Parting surface; Design structure

目 录

摘 要.....................................................................................................................................................Ⅰ

Abstract...................................................................................................................................................Ⅱ

第一章 绪 论.......................................................................................................................................1

1.1 课题背景及意义 1

1.2 注塑模具发展现状 1

1.3课题目标与内容.........................................................................................................................1

1.3.1塑件的结构设计..............................................................................................................2

1.3.2模流分析..........................................................................................................................2

1.3.3模具设计..........................................................................................................................2

第二章 塑件设计及工艺分析 3

2.1塑件外形尺寸设计 3

2.2塑件表面粗糙度分析.................................................................................................................3

2.3塑件的尺寸精度分析 3

2.4选取材料分析 ...3

第三章 塑件模流分析.............................................................................................................................5

3.1塑件的网格划分.........................................................................................................................5

3.2塑件浇口位置的选择.................................................................................................................5

3.2.1塑件的浇口匹配性分析..................................................................................................5

3.2.2塑件浇口位置的确定......................................................................................................6

3.3塑件成型窗口分析.....................................................................................................................6

3.4塑件的气穴分析.........................................................................................................................7

3.5塑件的熔接线.............................................................................................................................7

3.6塑件充填阶段各项数据变化.....................................................................................................7

第四章 塑件的方案分析.........................................................................................................................9

4.1分型面位置的确定.....................................................................................................................9

4.2型腔数量的确定.........................................................................................................................9

4.3模架与相关零件的选择 9

4.4注射机的概述和选择...............................................................................................................10

4.4.1注射机型号的确定........................................................................................................10

4.4.2注射机有关参数的校核................................................................................................11

4.4.3模具厚度与注射机闭合高度校核 ..12

第五章 成型零部件的结构设计计算...................................................................................................13

5.1成型零部件的结构设计.......................................................................................。..................13

5.2型腔的结构设计 13

5.3型芯的结构设计 13

5.4成型零部件工作尺寸的计算 14

第六章 其他机构的设计.......................................................................................................................16

6.1浇注系统的设计.......................................................................................................................16

6.1.1 主流道的设计...............................................................................................................16

6.1.2 分流道的设计 16

6.1.3 浇口的设计 17

6.1.4 冷料穴和拉料杆的设计 18

6.2 冷却系统的设计 19

6.2.1 冷却系统相关计算 19

6.3 排气系统的设计 20

6.4推出机构的设计 20

6.4.1 推出方式的确定 20

6.4.2 脱模力的计算 21

6.4.3 复位机构的设计 21

6.5导向机构的设计 22

6.5.1导柱的设计 22

6.5.2 导套的设计 22

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