机械5

计算器外壳注塑模模具设计 摘要 计算器外壳是当今社会日常中的工具。计算器外壳产品的外壳造型很多，市面上不断出现着各种款式,计算器外壳子制品成为最常见的研究课题。制品材料为热塑性塑料ABS（丙烯腈-丁二烯-苯乙烯共聚物），材料收缩率仅0.4%～0.7%。我们通过分析和研究，参照有关的技术文献，选定材料和有关技术参数，设计出这款计算器外壳外壳的注塑模具。由制品图可知，该制品尺寸较小，形状不规则，采用顶针推出塑件，另外，塑件内壁有两个卡槽，为使制品顺利脱模而又不影响制品要求，加入两个斜顶，从而减小脱模阻力，是本模具中设计的要点。其他结构设计在此不再赘述，详细内容见后面章节。 关键词：计算器外壳；注塑模；顶针推出；脱模；斜顶 Abstract The calculator housi
ng is a daily tool i
n today's society.The shell of calculator shell products has ma
ny shapes, a
ndvarious styles appear co
nti
nuously o
n the market. The shell products of calculator have become the most commo
n research topic.The product material is thermoplastic ABS(acrylo
nitrile-butadie
ne-styre
ne copolymer)with material shri
nkage of 0.4%~0.7%.Through a
nalysis a
nd research, referri
ng to releva
nt tech
nical docume
nts, selecti
ng materials a
nd related tech
nical parameters,we desig
ned the i
njectio
n mold for the shell of this calculator.It ca
n be see
n from the product drawi
ng that the product is small i
n size a
nd irregular i
n shape, a
nd the plastic part is pushed out by ejector pi
n. I
n additio
n, there are two clampi
ng grooves o
n the i
n
nerwall of the plastic part. I
n order to make the product demould smoothlywithout affecti
ng the product requireme
nts, two i
ncli
ned roofs are added to reduce the demouldi
ng resista
nce,which is the key poi
nt i
n the desig
n of this die.Other structural desig
ns are
not repeated here. See the followi
ng chapters for details. Keywords: calculator housi
ng; i
njectio
n moldi
ng; ejector pi
n pushi
ng out; demouldi
ng; diago
nal top 目录 摘要I 1.塑件成形工艺性分析1 1.1.塑件的分析1 1.2.热塑性塑料ABS的注射成形过程及工艺参数4 1.3.ABS的性能分析5 2.拟定模具结构形式6 2.1.分型面位置的确定6 2.2.确定型腔数量及排列方式8 2.3.模具结构形式的确定9 3.注射机型号的确定10 3.1.所需注射量的计算11 3.2.注射机型号的选定12 3.3.型腔数量及注射机有关工艺参数的校核13 4.浇注系统形式和浇口的设计16 5、成型零件的结构设计和计算19 5.1.型腔的工作尺寸的计算20 5.2．型芯径向尺寸的计算21 6、模架的确定和标准件的选用23 7、合模导向机构的设计24 8、脱模推出机构的设计25 8.1.脱模推出机构的设计原则26 8.2.塑件推出的基本方式26 8.3.塑件的推出机构27 8.4.脱模力的计算与校核28 9、排气系统的设计28 10、温度调节系统的设计29 11．模具的加工制造、装配、调试与维护30 11.1.模具的加工制造和装配30 11.2.模具的调试31 11.3.模具的维护与保养32 11.4.模具的工作过程及原理33 设计小结34 参考文献36