机械5

耳机塑料注塑模具设计 摘要 塑料工业是当今世界上增长最快的工业门类之一，而注塑模具是其中发展较快的种类，因此，研究注塑模具对了解塑料产品的生产过程和提高产品质量有很大意义。注射模技术的不断发展需要越来越多的工艺流程。注射成型过程中最重要的问题是模具的正确设计。 从根本上说，注射模具包括浇口和浇注系统，另一部分是放置顶出系统。模具零件是在分型面被定位的。 注射模具型腔选择等设计计算要求掌握加工材料、注射机和模具等方面的准确知识。模具的制造成本随着型腔数目的增加而增加，而相关的加工费用减少了。一个给定的模具零件的生产周期取决于壁厚、注射速度、收缩率、模内材料的冷却时间、冷却的效能及必要的辅助时间，如压力持续时间、排气时间及延迟时间等。 本设计介绍了注射成型的基本原理，特别是单分型面注射模具的结构与工作原理，对注塑产品提出了基本的设计原则；详细介绍了冷流道注射模具浇注系统、温度调节系统和顶出系统的设计过程，通过本设计，可以对注塑模具有一个初步的认识，注意到设计中的某些细节问题，了解模具结构及工作原理。 关键词：塑料模具，参数化，分型面，浇注系统，模具型腔。 THE PLASTIC INJECT MODLE DESIGN ABSTRACT plastic i
ndustry is i
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ndustry classes, but casts the mould is developme
nt quick type, therefore, the research casts the mold to u
ndersta
nd the plastic product the productio
n process a
nd improves the product quality to have thevery big sig
nifica
nce. The co
nti
nui
ng developme
nt of i
njectio
n mold tech
nology dema
nds more a
nd more of the processes. The most importa
nt problem i
n the process of i
njectio
n moldi
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ndoubtedly the correct desig
n of i
njectio
n mold. Basically the i
njectio
n mold co
nsists of two halves. O
ne mold half co
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ng a
nd ru
n
ner system, the other half houses the ejectio
n system. The molded part is located at the parti
ng li
ne. To set up a calculatio
n co
nceivi
ng the choice of cavities i
n a
n i
njectio
n mold requires accurate k
nowledge of the matrrial to be processed, of the i
njectio
n-moldi
ng machi
ne a
nd of the molds. The mold costs i
ncreasewith the risi
ng
number of cavities a
nd the relative machi
ne costs decrease. The productio
n time required for a give
n molded part depe
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njectio
n speed, the recovery rate, the time required to coll the molded material, the cooli
ng capacity of the mold a
nd the
necessary i
ncide
ntal time such as duratio
n of pressure holdi
ng time, ejectio
n time, delay time, ect. This desig
n i
ntroduced the i
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n takes shape the basic pri
nciple, specially si
ngle is divided the profile to i
nject the mold the structure a
nd the pri
nciple of eork, to cast the product to propose the basic pri
nciple of desig
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ntral system a
nd goes agai
nst the system the desig
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nd has give
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nte
nsity request; Through this desig
n, may to cast the mold to have a prelimi
nary u
ndersta
ndi
ng,
notes i
n the desig
n certai
n detail questio
n, u
ndersta
nds the mold structure a
nd the pri
nciple ofwork; Through to the PROGRAM study, may establish the simple compo
ne
nts the compo
ne
nts storehouse, thus effective e
nha
nceme
nt eorki
ng efficie
ncy. KEY WORDS: The plastic mold, the parameterizatio
n, i
nlays, divides the profile 目录 前言1 第一章：制件的结构与工艺性分析2 1.1制件相关信息2 1.2材料的相关性质3 1.2.1基本特性3 1.2.2主要用途3 1.2.3成型特点3 1.3塑件的脱模斜度4 1.4塑件的尺寸精度及表面质量要求4 第二章：初选注射机6 2.1计算塑件体积和最大投影面积6 2.2选择压力机6 2.3确定型腔数目7 第三章模具设计9 3.1型腔的分布设置9 3.2分型面的确定9 3.3浇口的确定原则10 3.4浇注系统的确定11 3.4.1主流道的设计11 3.4.2分流道的设计12 3.4.3冷料穴的设计13 3.4.4浇口的相关参数选择14 3.5成型零部件的结构设计14 3.5.1型腔的结构设计14 3.5.2型芯的结构设计15 3.6模具成型零部件尺寸计算15 3.5.1计算成型零部件尺寸要考虑的因素16 3.5.2制件尺寸的公差转换16 3.5.3成型零部件尺寸计算17 3.7模架的选用20 3.7.1模架型号的确定20 3.7.2模架具体尺寸的确定21 3.8结构零部件的设计22 3.8.1支承板的设计22 3.8.2垫块的设计22 3.8.3定模座板和动模座板的设计22 3.8.4导柱的设计23 3.8.5导套的设计24 3.8.6设计导柱导套需要注意的事项24 3.9推出机构的设计24 3.9.1推杆的设计25 第四章冷却系统的设计28 4.1冷却水孔直径的确定28 4.2冷却水回路的布置原则28 第五章注射机的相关校核29 5.1注射机额定注射量的校核29 5.2注射压力的校核29 5.3锁模力的校核29 5.4模具安装尺寸的校核30 5.41喷嘴尺寸校核30 5.4.2模具厚度校核30 5.5开模行程的校核31 结论32 谢辞33 参考文献34