机械5

牙刷保护管顶盖注塑模设计 摘要 模具是以特定的结构形式通过一定方式使材料成型的一种工业产品，同时也是能成批生产出具有一定形状和尺寸要求的工业产品零部件的一种生产工具。大到飞机、汽车，小到茶杯、钉子，几乎所有的工业产品都必须依靠模具成型。用模具生产制件所具备的高精度、高一致性、高生产率是任何其它加工方法所不能比拟的。模具在很大程度上决定着产品的质量、效益和新产品开发能力。所以模具又有“工业之母”的荣誉称号。 模具设计与制造专业的培养目标是：培养德、智、体、美等方面全面发展，具有良好的职业素质，面向制造行业，从事模具设计、模具加工工艺编制、冲压和塑料成型加工、数控机床的操作以及生产管理等工作的高等技术应用性专门人才。体现为制造方面达到模具制造的补师水平，设计方面达到助理设计师的水平 在本设计中，牙刷保护管顶盖作为日常用品适宜采用注射方法成型，通过对塑件进行结构和工艺性分析，设计出一套一模两腔的塑料注射模具，并合理编写出成型零件的制造工艺。在设计中，三维软件的应用贯穿到了整个设计过程，首先利用三维软件的零件模块进行牙刷保护管顶盖实体模型的创建，然后利用其制造模块对模型进行分模、型芯的设计、浇注系统的设计，最后利用其模具生成标准模架，再进行顶杆、冷却系统、支撑柱等综合布置。在模具的设计过程中，一些重要的尺寸（如壁厚，顶杆直径，流道尺寸等）都经过了理论计算或取一个合理的经验数值，并进行了强度校核和流道剪切速率的校核。 关键词：牙刷保护管顶盖；一模两腔；注射模具，浇注系统，模架，冷却系统 Abstract Mold is a ki
nd of i
ndustrial product that moulds materials i
n a certai
nway i
n a specific structure form. It is also a productio
n tool that ca
n produce parts of i
ndustrial productswith certai
n shape a
nd size requireme
nts i
n batches. As large as aircraft, cars, small cups,
nails, almost all i
ndustrial products must be moulded. The high precisio
n, high co
nsiste
ncy a
nd high productivity produced by the mold productio
n are i
ncomparable to a
ny other processi
ng methods. To a great exte
nt, the mould determi
nes the quality, be
nefit a
nd the developme
nt ability of the
new product. So the mold also has the ho
norary title of"the mother of i
ndustry". Trai
ni
ng target of mold desig
n a
nd ma
nufacturi
ng specialty is to cultivate all-rou
nd developme
nt of morality, i
ntellige
nce, body, beauty, good occupatio
n quality, ma
nufacturi
ng i
ndustry, adva
nced tech
nology a
nd specialized perso
n
nel e
ngaged i
n mold desig
n, process desig
n, mold stampi
ng a
nd plastic moldi
ng processi
ng, CNC machi
ne tool operatio
n a
nd productio
n ma
nageme
ntwork. To achieve the level of mould maki
ng i
n ma
nufacturi
ng, a
nd to achieve the level of assista
nt desig
ner i
n desig
n. I
n this desig
n, the toothbrush cover protectio
n tube as a daily
necessities suitable for i
njectio
n moldi
ng method, through the a
nalysis of structure a
nd process of plastic parts, desig
n a set of the first mock exam two cavity plastic i
njectio
n mold, a
ndwrite out the reaso
nable ma
nufacturi
ng process of moldi
ng parts. I
n the desig
n, the applicatio
n of 3D software throughout the e
ntire desig
n process, first use of 3D software module parts create top tube protectio
n toothbrush solid model desig
n, the
n the ma
nufacturi
ng module of the sub module, the core of the model, the desig
n of gati
ng system, the mold formatio
n usi
ng the sta
ndard mold, the
n ejector, cooli
ng system, support colum
n comprehe
nsive arra
ngeme
nt. Duri
ng the desig
n process, some importa
nt dime
nsio
ns, such aswall thick
ness, ejector pi
n diameter a
nd ru
n
ner size, have bee
n calculated theoretically or a reaso
nable empiricalvalue has bee
n obtai
ned, a
nd stre
ngth check a
nd flow path shear rate check have bee
n carried out. Keywords: toothbrush protectio
n tube cover; the first mock exam two cavity; i
njectio
n mold, mold, gati
ng system, cooli
ng system 目录 摘要I Abstract II 1前言- 1- 2塑件成型工艺分析- 4- 2.1塑件的使用要求- 4- 2.1.1脱模斜度- 4- 2.1.2塑件的壁厚- 4- 2.1.3塑件的圆角- 4- 2.1.4孔- 4- 2.1.5塑件尺寸及精度- 5- 2.2塑件的材料分析- 5- 2.2.1注射成型工艺过程分析[5]- 6- 2.2.2浇口种类的确定- 6- 2.3塑件的尺寸精度、塑件表面质量、塑件的结构工艺性分析- 7- 2.3.1塑件的尺寸精度分析- 7- 2.3.2塑件的表面质量分析- 7- 2.3.3塑件的结构工艺性分析- 8- 2.4注射机的选择和校核- 8- 2.4.1注射量的校核- 9- 2.4.2塑件在分型面上的投影面积与锁模力的校核- 9- 2．4．3、模具与注射机安装模具部分相关尺寸校核- 9- 3成型设备选择与模塑工艺参数的编制- 11- 3.1塑件的体积和重量- 11- 3.2型腔数量确定- 12- 3.3浇注系统凝料的估算- 12- 3.4注射机的选用及其技术参数- 12- 3.5成型工艺参数- 13- 4模具结构方案的确定- 14- 4.1分型面位置确定- 14- 4.2浇注系统的设计与计算- 15- 4.2.1主流道设计- 15- 4.2.2分流道的设计- 17- 4.2.3浇口的设计- 17- 4.3成型零件结构的确定- 19- 4.3.1冷料穴的设计- 19- 4.3.2凹模的结构设计- 19- 4.3.3凸模（型芯）的结构设计- 20- 4.4排气与引气系统结构的确定- 21- 5主要零部件的设计计算- 22- 5.1成型零件工作尺寸计算- 22- 5.1.1凹模宽度尺寸的计算- 22- 5.1.2凹模长度尺寸的计算- 23- 5.1.3凹模高度尺寸的计算- 23- 5.1.4凸模宽度尺寸的计算- 23- 5.1.5凸模长度的计算- 23- 5.1.6凸模高度尺寸的计算- 23- 5．2排气结构设计- 24- 5.3脱模机构的设计- 25- 5.4推出方式的确定- 25- 6模具冷却系统的计算- 27- 6.1冷却介质- 27- 6.2冷却系统计算- 27- 6.3水路的布置形式- 28- 7注射机有关参数的校核- 29- 7.1注射量的校核- 29- 7.2注射压力的校核- 29- 7.3合模力校核- 29- 7.4安装部分相关尺寸的校核- 30- 7.5开模行程的校核- 30- 第8章模具材料的选用- 31- 8．1成型零件材料选用- 31- 8．2注射模用钢种- 31- 结论- 32- 致谢- 33- 参考文献- 35-