机械5

笔筒注塑工艺分析与模具设计 摘要 本次设计以“笔筒”塑件为设计对象。首先分析聚碳酸酯（PC）的注塑工艺、笔筒塑件的结构、精度等级及工艺性；其次确定了型腔数目、分型面及型腔排布位置、浇口形式及位置、侧抽芯机构、推出机构等模具结构设计；然后根据不同塑件精度及尺寸的要求，针对笔筒注塑模具进行注塑机的初选与校核，并构建标准模架及标准件；最后运用Pro/E、EMX、AutoCAD等计算机辅助绘图软件对笔筒注塑模具展开三维立体结构设计并制作二维平面工程图。 笔筒塑件采用无味、无毒、透明的PC材料注塑成型。该工件具有重量轻、耐腐蚀老化、强度高、使用寿命长、制作方便、价格低廉等特点。分型面选择在笔筒中间剖切面上、型腔确定为一模两腔、型腔排布为平衡对称式、注塑模选用双分型面注塑模、浇口选择为侧浇口、标准模架选用龙记模架（LKM），其型号规格为：AH-2525-A30-B30-C60，模仁尺寸为40x110x15mm,40x110x15mm，选定注射机型号为XS-ZY-125，其螺杆转速为10~140r/mi
n,模板最大厚度为300mm、最小厚度为200mm,机器外形尺寸为3.34×0.75×1.55(m).本次设计运用AutoCAD、Pro/E及EMX软件完成笔筒零件图、笔筒型腔的建立、笔筒注塑模具及笔筒平面工程图的绘制。 关键词:注塑模具,笔筒,聚碳酸酯（PC）,工艺分析，模具结构设计 Abstract The graduatio
n desig
n to"pe
n holder" plastic parts for the desig
n object. First a
nalysis of polycarbo
nate(PC) i
njectio
n moldi
ng process, pe
n holder, the structure of plastic parts, precisio
n grade a
nd ma
nufacturability; Seco
nd determi
nes the
number of cavity, the parti
ng surface a
nd mold arra
ngeme
nt, the gate form a
nd positio
n, side core-pulli
ng mecha
nism, lau
nch i
nstitutio
ns such as the die structure desig
n; The
n accordi
ng to the requireme
nts of differe
nt parts precisio
n a
nd size for brush pot i
njectio
n mold for i
njectio
n moldi
ng machi
ne, a
nd primary a
nd build sta
ndard mold base a
nd sta
ndard parts; The use of Pro/E, EMX, AutoCAD a
nd other computer aided drawi
ng software to brush pot i
njectio
n mould o
n 3 d structure desig
n a
nd co
nstructio
n of two-dime
nsio
nal pla
ne e
ngi
neeri
ng drawi
ng. pe
n holder adopts
no
n-toxic, tasteless a
nd tra
nspare
nt PC material moldi
ng. The artifact has lightweight, corrosio
n resista
nce agi
ng, high stre
ngth, lo
ng service life, co
nve
nie
nt productio
n a
nd low price, etc. Parti
ng surface selectio
n i
n the middle of the pe
n co
ntai
ner o
n the cutti
ng pla
ne, desig
nated o
ne module a
nd two cavities, mold cavity co
nfiguratio
n is bala
nced symmetrical type, selectio
n of i
njectio
n moulds, double i
njectio
n mold parti
ng surface, choice of gate for the side gate, selectio
n of sta
ndard mould base drago
n die set(LKM), the specificatio
ns for: AH- 2525- A30- B30- C60, mould ker
nel size of 40x110x15mm, 40x110x15mm, i
njectio
n machi
ne
number is selected the XS- ZY- 125, the screw rotatio
n speed is 10~ 140 r/mi
n, the maximum thick
ness of template is 200 mm, 300 mm, mi
nimum thick
ness machi
ne appeara
nce size 3.34* 0.75* 0.75(m). The graduatio
n desig
n usi
ng AutoCAD, Pro/E a
nd EMX software complete pe
n co
ntai
ner parts diagram, the establishme
nt of the brush pot cavity, pe
n holder i
njectio
n mould a
nd pai
nt pe
n holder pla
ne e
ngi
neeri
ng drawi
ng. Keywords: i
njectio
n mould, pe
n holder, polycarbo
nate(PC), process a
nalysis a
nd die structure desig
n 目录 摘要I Abstract II 绪论1 1.1课题的背景和意义1 1.2国内外的研究现状和发展趋势1 1.3课题的主要内容3 第一章笔筒塑件的设计5 1.1笔筒塑件分析5 1.2笔筒塑件的选材6 1.2.1材料的要求6 1.2.2材料的性能分析6 1.2.3 PC的注塑成型工艺分析7 1.3笔筒塑件工艺分析8 1.3.1结构分析8 1.3.2工艺性分析9 1.3.3精度等级9 1.3.4成型方案的确定9 第二章注塑成型模具的设计11 2.1确定型腔数目11 2.2确定分型面的位置11 2.3型芯、型腔、工作部位的确定12 2.4型腔位置的排布14 2.5初步设计主流道及分流道的形状与尺寸14 2.6确定浇口形状及位置16 第三章模具结构设计17 3.1初选注塑机17 3.1.1注射量17 3.1.2注射压力17 3.1.3锁模力17 3.2选择注塑机床的型号18 3.3主流道衬套形式19 3.4型腔尺寸的确定19 3.5动定模尺寸的确定19 3.6导向机构的设计22 3.7推出机构的设计23 3.7.1推出机构23 3.7.2推出机构的设计要点23 3.8侧向抽芯机构的设计25 3.8.1抽芯机构25 3.8.2侧抽芯的组成25 3.8.3影响侧抽芯力的因素25 3.8.4侧抽芯机构的设计准则26 3.8.5侧抽芯力的确定26 3.8.6侧抽芯距的确定26 3.9温度调节系统的设计27 3.9.1温度调节系统27 3.9.2温度调节对塑件质量的影响27 3.9.3温度调节系统的要求28 3.9.4冷却系统设计28 第四章注塑模具的校核30 4.1注射量的校核30 4.2注射压力的校核30 4.3安装部分相关尺寸的校核30 4.3.1注塑机的喷嘴与模具主流道衬套的校核30 4.3.2模版厚度的校核30 4.4侧向抽芯的开模行程校核30 第五章模架的选择31 5.1模架的选择31 第六章笔筒模具的装配35 6.1笔筒模具总装图35 6.2成型特点36 第七章模具材料37 7.1模具材料的作用和地位37 7.2笔筒注塑模具材料的选择37 第八章模具寿命与维护39 8.1模具的寿命39 8.2模具的维护39 总结40 致谢41 参考文献42