机械5

带轮注塑模设计 摘要 塑料是一种可塑性的合成高分子材料，具有重量轻且坚固，耐化学腐蚀，电绝缘性好，价格便宜，可塑性好等特点，广泛应用于电脑、手机、汽车、电机、电器、家电和通讯产品制造中。注塑成形是成形塑件的主要方法之一，是指使用注塑机将热塑性塑料熔体在高压下注入到模具内经冷却固化获得产品的方法。注塑的优点是生产速度快，效率高，操作可自动化，能成型形状复杂的零件，特别适合大量生产。本次设计的产品为带轮，具有重量轻，强度高，耐腐蚀，易清洁等特点，为大批量生产产品。本次设计在针对产品进行工艺性分析后，确定模具分型面、型腔数目、浇口形式、位置大小；其中最重要的是确定型芯和型腔的结构，以及它们的定位和紧固方式。此外还进行了脱模机构的设计，合模导向机构的设计，冷却系统的设计等。最后绘制完整的模具装配总图和主要的模具零件图及编制成型零部件的制造加工工艺过程卡片。实践证明：该模具结构合理、可靠,并能保证产品质量,对此类注塑产品的模具设计有参考价值。 关键词：塑料,带轮,注塑成形,模具设计 Abstract Plastic is a ki
nd of plastic sy
nthetic polymer material, with light weight a
nd stro
ng, chemical corrosio
n resista
nce, good electrical i
nsulatio
n, cheap price, good plasticity a
nd other characteristics, widely used i
n computer, mobile pho
nes, automobiles, electrical applia
nces, household applia
nces a
nd commu
nicatio
ns products ma
nufacturi
ng. I
njectio
n moldi
ng is o
ne of the mai
n methods of formi
ng plastic parts, which mea
ns that thermoplastic melt is i
njected i
nto the mold u
nder high pressure by usi
ng a
n i
njectio
n moldi
ng machi
ne a
nd the product is obtai
ned by cooli
ng a
nd curi
ng. The adva
ntages of i
njectio
n moldi
ng are fast productio
n speed, high efficie
ncy, automatic operatio
n, a
nd the ability to shape complex parts, especially suitable for mass productio
n. The graduatio
n desig
n of the product for the pulley, with light weight, high stre
ngth, corrosio
n resista
nce, easy to clea
n a
nd other characteristics, for mass productio
n of products. After the tech
nological a
nalysis of the product, the mold parti
ng surface, cavity
number, gate type a
nd positio
n size are determi
ned; the most importa
nt is to determi
ne the core a
nd cavity structure, as well as their positio
ni
ng a
nd faste
ni
ng mode. Besides, the desig
n of the ejectio
n mecha
nism, the desig
n of the clampi
ng mecha
nism a
nd the desig
n of the cooli
ng system are also carried out. Fi
nally, a complete ge
neral assembly drawi
ng of the mold a
nd the mai
n parts of the mold drawi
ng a
nd the preparatio
n of formi
ng parts ma
nufacturi
ng process cards. Practice has proved that the die structure is reaso
nable, reliable, a
nd ca
n e
nsure the quality of products, which is of refere
nce value to the desig
n of such i
njectio
n molds. Key words: plastic, pulley, i
njectio
n moldi
ng, mold desig
n 目录 摘要- 2 - Abstract - 3 - 前言- 4 - 绪论- 5 - 第一章工艺分析- 6 - 1.1.1塑料材料特性- 7 - 1.1.2塑料材料成形性能- 8 - 1.1.3带轮的结构与精度分析- 8 - 1.1.4塑件材料的应用- 9 - 第二章塑件成形型工艺分析及方案批订- 10 - 2.1.1成形方法的确定- 10 - 2.1.2型腔位置确定： - 11 - 2.1.3分型面的确定： - 11 - 2.1.4浇注系统的选择- 12 - 2.1.5冷料穴与拉料杆设计- 13 - 2.1.6模具排气槽设计- 13 - 2.1.7推出方式的确定- 14 - 2.1.8确定抽芯机构： - 14 - 2.1.9楔紧块的设计- 15 - 2.1.10模具的结构形式- 15 - 第三章模具的结构及其尺寸的设计计算- 19 - 3.1模具结构设计- 19 - 3.2模具成形尺寸设计计算- 20 - 3.3模具的冷却系统的设计- 22 - 第四章注射机有关参数的校核- 24 - 4.1注射量的校核- 24 - 4.2锁模力的校核- 24 - 4.3开模行程的校核- 24 - 4.4模具厚度校核- 24 - 4.5模具外形尺寸校核- 24 - 第五章安装与调试- 25 - 5.1模具的安装试模- 25 - 5.2模具的安装及调试- 25 - 5.3试模- 26 - 5.4检验- 26 - 总结与展望- 27 - 致谢- 28 - 参考文献- 29 -