机械5

弯管接头注射模具设计 摘要 塑料是以高聚物为主要成分的物质，它的特点是重量轻，比较坚固，耐化学腐蚀性和电绝缘性优良，市场上塑料价格相对便宜，具有不错的可塑性，在电脑、手机、汽车、医疗器械、电器、家电和通讯产品制造中有着广泛的应用。通常塑件是用塑料熔体注射进注射模具的行腔中形成的。注射模具有很多优点，比如成型效率高、生产出的塑件一致性好，可以自动化操作，可以大量生产复杂零件，加工成本不高。本次设计的产品为弯管接头，它的特点是重量轻，强度高，耐腐蚀，易清洁，适合大批量生产。要完成本次设计，首先要先分析塑件的工业特点，然后确定其注射成型原理，选择合适的注射机和模架。然后要确定模具的分型面、型腔数目、流道结构、浇口形式和位置。接着要确定塑件在模具中的位置，从而才能选择模具内部零件结构，和塑件的固定形式。然后根据这些设计模具的脱模、推出等机构。最后要完成一份模具设计的装配图、三维图和一份设计报告。 关键词：弯管接头注射成型模具设计 Desig
n of I
njectio
n Mold for Pipe Joi
nt Abstract Plastic is a high polymer as the mai
n compo
ne
nt of the material, which is characterized by light weight, relatively stro
ng, resista
nt to chemical corrosio
n a
nd excelle
nt electrical i
nsulatio
n, the market price of plastic is relatively cheap, with good plasticity, i
n the computer, mobile pho
ne, car , Medical equipme
nt, electrical applia
nces, household applia
nces a
nd commu
nicatio
ns products ma
nufacturi
ng has a wide ra
nge of applicatio
ns. Usually the plastic parts are filled with plastic melt i
nto the i
njectio
n cavity of the i
njectio
n mold. I
njectio
n mold has ma
ny adva
ntages, such as high moldi
ng efficie
ncy, the productio
n of plastic parts co
nsiste
ncy, a
nd ca
n be automated operatio
n, you ca
n mass productio
n of complex parts, processi
ng costs are
not high. The graduatio
n desig
n of the product for the elbow joi
nts, which is characterized by light weight, high stre
ngth, corrosio
n resista
nce, easy to clea
n, suitable for mass productio
n. To complete this desig
n, we must first a
nalyze the i
ndustrial characteristics of plastic parts, a
nd the
n determi
ne the pri
nciple of its i
njectio
n moldi
ng, select the appropriate i
njectio
n moldi
ng machi
ne a
nd mold. A
nd the
n to determi
ne the mold parti
ng, cavity
number, flow cha
n
nel structure, gate form a
nd locatio
n. A
nd the
n to determi
ne the plastic parts i
n the mold positio
n, so as to determi
ne the structure of the cavity, as well as the plastic parts of the faste
ni
ng. I
n additio
n to desig
n strippi
ng mecha
nism, mold-orie
nted mecha
nism a
nd cooli
ng system. Fi
nally, drawi
ng a complete drawi
ng of the mold a
nd the releva
nt parts of the drawi
ngs a
nd parts of the map, the preparatio
n of parts a
nd compo
ne
nts of the ma
nufacturi
ng process process cards, complete the desig
n of the ge
neral i
nstructio
ns. Practice has proved that: the mold structure is reaso
nable a
nd reliable, a
nd to e
nsure product quality, such i
njectio
n moldi
ng products, mold desig
n refere
nce value. Key Words: Curved pipe joi
nt I
njectio
n moldi
ng Mold desig
n 目录 摘要I AbstractⅡ 1绪论1 1.1模具工业简介1 1.2塑料成型工业在生产中的地位1 1.3塑料成型技术的发展趋势2 2塑件的工艺分析3 2.1塑件的工艺特点分析3 2.2塑件材料的成型特性4 3分型面的选择5 3.1型腔的布局5 3.2分型面的设计5 4浇注系统的设计7 4.1主流道的设计7 4.2浇口套的设计8 4.3分流道的设计9 4.4浇口的选择10 4.5冷料穴的设计12 4.6拉料杆的设计12 4.7定位圈的设计13 4.8排气系统的设计14 5注射机的选择15 5.1注射成型工艺条件15 5.2注射机的选择15 5.3模架的初选15 5.4注射机的校核16 6成型零部件设计19 6.1凹模和凸模的结构设计19 6.2成型零件工作尺寸计算20 7结构零部件设计22 7.1标准件的选用22 7.2模架的选择20 7.3合模导向机构的设计23 8侧抽芯机构设计26 8.1抽芯力与抽芯距的确定26 8.2液压滑块侧抽芯机构27 8.3斜导柱侧抽芯机构28 8.4斜导柱的设计29 8.5斜顶的设计30 8.6滑块的设计31 8.7楔紧块的设计32 8.8导滑槽的设计33 8.9滑块限位装置的设计34 9推出机构设计35 9.1推出机构的设计要求35 9.2推出力的计算35 9.3推杆的形状36 9.4推杆的位置和布局的选择原则36 10温度调节系统38 10.1模具温度调节的重要性38 10.2冷却水回路的布置38 10.3冷却水回路的尺寸确定39 11模具总装配图42 12结论45 参考文献46 致谢47