机械5

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，桶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，设计出一套一模一腔的塑料注射模具，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桶盖实体模型的创建，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：桶盖；注射模具；型芯；浇注系统；冷却系统 Abstract Die is a ki
nd of i
ndustrial product which makes the material shape by a certai
n way i
n a specific structure form. It is also a ki
nd of productio
n tool that ca
n produce i
ndustrial product parts with certai
n shape a
nd size requireme
nts i
n batches. From airpla
nes a
nd cars to teacups a
nd
nails, almost all i
ndustrial products must be molded. The high precisio
n, high co
nsiste
ncy a
nd high productivity of the parts ma
nufactured by mould are i
ncomparable with a
ny other processi
ng method. To a large exte
nt, mold determi
nes product quality, efficie
ncy a
nd
new product developme
nt capability. Therefore, the mold has the ho
nor of the mother of i
ndustry. The trai
ni
ng goal of mold desig
n a
nd ma
nufacturi
ng specialty is to cultivate all-rou
nd developme
nt of morality, i
ntellige
nce, physique a
nd beauty, with good professio
nal quality, a
nd to apply adva
nced tech
nology i
n mold desig
n, mold processi
ng tech
nology preparatio
n, stampi
ng a
nd plastic formi
ng processi
ng, CNC machi
ne tool operatio
n a
nd productio
n ma
nageme
nt, etc. for ma
nufacturi
ng i
ndustry. Professio
nal tale
nts. Embodies the level of makeup for mold ma
nufacturi
ng, a
nd reaches the level of assista
nt desig
ner i
n desig
n. I
n this desig
n, the barrel cover is suitable for i
njectio
n moldi
ng as a daily product. By a
nalyzi
ng the structure a
nd process of the plastic parts, a set of plastic i
njectio
n mold with o
ne mold a
nd o
ne cavity is desig
ned, a
nd the ma
nufacturi
ng process of the moldi
ng parts is reaso
nably prepared. I
n the desig
n, the applicatio
n of three-dime
nsio
nal software ru
ns through the whole desig
n process. First, the solid model of the barrel cover is created by the parts module of three-dime
nsio
nal software, the
n the model is divided i
nto molds, the core is desig
ned a
nd the gati
ng system is desig
ned by the ma
nufacturi
ng module. Fi
nally, the sta
ndard mold frame is ge
nerated by the mold, a
nd the
n the ejector is made. The cooli
ng system, supporti
ng colum
ns a
nd other comprehe
nsive layout. I
n the process of die desig
n, some importa
nt dime
nsio
ns (such as wall thick
ness, plu
nger diameter, ru
n
ner size, etc.) have bee
n calculated theoretically or take
n a reaso
nable empirical value, a
nd stre
ngth checki
ng a
nd ru
n
ner shear rate checki
ng have bee
n carried out. Key words barrel cover; i
njectio
n mold; core; 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 2.2塑件的材料分析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 2.4注射机的选择和校核8 3成型设备选择与模塑工艺参数的编制12 3.1塑件的体积和重量12 3.2型腔数量确定13 3.3浇注系统凝料的估算13 3.4注射机的选用及其技术参数13 3.5成型工艺参数14 4模具结构方案的确定16 4.1分型面位置确定16 4.2浇注系统的设计与计算17 4.3成型零件结构的确定21 4.4排气与引气系统结构的确定24 5主要零部件的设计计算25 5.1成型零件工作尺寸计算25 5.2成型零件尺寸及动模垫板厚度的计算26 5.3脱模机构的设计27 5.4推出方式的确定27 6模具冷却系统的计算29 6.1冷却介质29 6.2冷却系统计算29 6.3水路的布置形式30 7注射机有关参数的校核32 7.1注射量的校核32 7.2注射压力的校核32 7.3合模力校核32 7.4安装部分相关尺寸的校核33 7.5开模行程的校核33 第8章模具材料的选用34 8．1成型零件材料选用34 8．2注射模用钢种34 结论35 致谢36