显示器支架扣件塑料注射模具设计(外文翻译,论文说明书16200字,CAD图14张)
摘要
毕业设计是机械专业一个重要的教学环节，是实践性很强的教学内容，它是我们对前三年所学知识和技能进行系统化、综合化运用、总结和深化的过程。本次毕业设计是为了让我们能够综合运用模具设计的基本理论，并结合生产实习中学到的实践知识，独立的分析和解决工艺问题，具备设计一个简单程度零件的能力和注塑模设计的基本原理和方法，提高结构设计的能力，同时熟悉和运用有关手册、图表等技术资料及编写技术文件等基本技能的一次实践。本次设计通过对塑件实体的分析，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。该产品设计为中等批量生产，且作为扣件类产品，故模具设计应该充分考虑注塑成型后产品的质量问题，同时浇注系统要能够自动脱模，因而为保证塑件表面质量采用点浇口，且选用三分型面注射模，即“213”开模，实现点浇口自动脱模结构。模具的型腔采用一模一腔中心布置，浇注系统采用点浇口成形，推出形式为推杆推出机构完成塑件的推出。
关键词：模具；注塑模；塑料模具
Display bracket fasteners for plastic injection
Abstract
Mould design is one of the most important teaching of mechanical specialty chain, is a practice very discipline, is that we learned in the previous three years of systematic, comprehensive knowledge and skills applying, summarizing and deepening of processes.The graduation project is to enable us to study the integrated use ofmechanical manufacturing processes in the basic theory, combined with the production of practical knowledge learned in practice, independent analysis and resolution of process issues, has designed a medium-complexity parts of the process specification capabilities fixture design and application of basic principles and put laws and the development fixture design, the ability to complete the fixture structural design, but also are familiar with and use of relevant manuals, charts and other technical information and preparation of technical documents and practice for basic skills. This design through analysis of plastic entity, according to the product and plastic properties determine the number of plastic injection moulding production. The product is designed for medium-volume production, and as a fastener products, mold design should take into account after injection molding product quality problems, while pouring system to automatically release, thus to ensure the surface quality of plastic parts using the gate, and selection of injection mold for the three parting surfaces, that is, "213" opening, point the gate structure. Coursing Center of mold cavity layout, gating system using point gate molding, introduced in the form of putting out punch rollout of the finished plastic part.
Keywords: mold;injection molding; plastic mould
显示器支架扣件总体来看是一面板类塑件，其长度为103mm，宽度为70.2mm，最大厚度为4.1mm，最小厚度为3.1mm，扣件内侧分布有筋和通孔，从图2.2.3可看出塑件延伸部位有两个向内的侧挖。但是其所有结构均对称分布，故模具设计时不需要设置较复杂抽芯机构，该零件属于中等复杂程度。
目 录
1 绪论………………………………………………………………………………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本次设计的意义…………………………………………………………… 2
2 产品分析………………………………………………………………………4
2.1塑件分析……………………………………………………………………4
2.1.1结构分析……………………………………………………………………4
2.1.2尺寸精度分析………………………………………………………………6
2.1.3表面质量分析………………………………………………………………6
2.2材料分析………………………………………………………………………6
2.2.1功能设计……………………………………………………………………6
2.2.2材料选择……………………………………………………………………6
2.2.3ABS的成型性能……………………………………………………………7
2.2.4塑件材料的成型条件……………………………………………………7
2.2.5塑件体积和质量的计算…………………………………………………8
2.2.6初选注塑机…………………………………………………………………9
3 分型面及型腔的确定………………………………………………………10
3.1分型面的选择…………………………………………………………………10
3.2型腔数目的确定………………………………………………………………11
3.2型腔的分布……………………………………………………………………12
4 浇注系统的设计……………………………………………………………14
4.1浇口形式及位置的选择………………………………………………………14
4.2主流道杯的设计………………………………………………………………15
4.3主流道的设计…………………………………………………………………16
4.4分流道的设计…………………………………………………………………16
5 成型零件的结构设计………………………………………………………16
5.1定模的结构设计……………………………………………………………17
5.2动模的结构设计……………………………………………………………17
5.3成型零件的相关计算…………………………………………………………18
5.3.1型腔尺寸的计算…………………………………………………………19
5.3.2型芯尺寸的计算…………………………………………………………21
5.3.3型腔深度尺寸计算………………………………………………………22
5.3.4型芯高度尺寸计算………………………………………………………22
5.3.5型孔之间的中心距计算…………………………………………………23
5.4型腔侧壁和底板厚度计算……………………………………………………23
5.4.1型腔侧壁厚度计算………………………………………………………23
5.4.2底板厚度计算……………………………………………………………24
6 导向机构设计 ………………………………………………………………26
6.1导向机构设计………………………………………………………………26
6.1.1导柱设计…………………………………………………………………26
6.1.2导套设计………………………………………………………………26
6.2推出机构设计…………………………………………………………………27
6.2.1脱模力的计算……………………………………………………………27
6.2.2推出机构的选择…………………………………………………………28
6.3拉杆设计………………………………………………………………………29
6.4锁模机构设计…………………………………………………………………30
7 冷却及排气系统设计………………………………………………………31
7.1冷却系统设计………………………………………………………………31
7.2排气系统设计………………………………………………………………33
8 注塑机的校核 ………………………………………………………………35
8.1模具闭合高度的确定………………………………………………………35
8.2开模行程的校核……………………………………………………………35
8.3最大注塑量的校核…………………………………………………………36
8.4锁模力的校核………………………………………………………………37
8.5注射压力校核………………………………………………………………37
8.6喷嘴尺寸的校核……………………………………………………………37
9 模具工作原理 ………………………………………………………………39
9.1模具总装图…………………………………………………………………38
9.2模具开合模动作……………………………………………………………42
10 可行性分析…………………………………………………………………43
10.1实用性分析…………………………………………………………………43
10.2经济和环境性分析…………………………………………………………43
11 总结与展望…………………………………………………………………44
致谢………………………………………………………………………………45
参考文献 ………………………………………………………………………46
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