机械5

摘要 在科技发达的今天，注塑模具发挥了不小的作用，在机械、器械、用品的产品中都存在注塑模具的生产。从模具的开创至今模具设计和制造也是不断的进步与创新，以前绘制装配图都是用手绘制现如今科技发达绘制图纸只需要用电脑绘制，不仅仅绘制二维装配图连三维也能绘制。 本次设计的参考件是以长槽座为设计任务，此产品外形光滑简单，用UG三维软件绘制产品。在绘制过程中要考虑到抜模斜度，方便顶出脱模。绘制完成后，根据需求排列出一模二腔计算出他的模架，然后确定它的分型面。分型面的选择也要考虑到脱模的方向和零件的外形，还要考虑到型芯型腔的机械加工方便性和顶出机构的受力均匀。根据产品的排列和原料的流动性收缩率选择进料口使其填面不缺料。冷却方法根据模具的设计产品的摆放来确定，一般采用环绕式的水管。推出机构通常采用圆顶针，这种推模方式会留有顶出痕迹，如不能有顶出痕迹可使用推板推出或者使用机型手取出，选用的方式根据产品的使用和外观要求而定。三维软件绘制完成后根据图形再使用CAD绘制二维装配图和零件图，这样绘制二维装配图时思路清晰不容易出错。在设计过程中需考虑到模具在机械加工方面的制造工艺，还有就是在制造完成后模具使用的安全设备维修的方便跟换宜受损部分的简便，这都是在设计过程不可缺少的。 关键词：注塑模具；长槽座；脱模；一模二腔；模架；型芯；型腔 Abstract I
n today's highlydeveloped scie
nce a
nd tech
nology,i
njectio
n mold plays a great role i
n the productio
n of i
njectio
n mold i
n machi
nery,equipme
nt a
nd supplies.Die desig
n a
nd ma
nufacturi
ng has bee
n a co
nti
nuous progress a
nd i
n
novatio
n si
nce the begi
n
ni
ng of the die.Previously,assemblydrawi
ngswere draw
n byha
nd.Today,adva
nced scie
nce a
nd tech
nologydrawi
ngs o
nly
need to be draw
n bycomputer,
not o
nlytwo-dime
nsio
nal assemblydrawi
ngs but also three-dime
nsio
nal assemblydrawi
ngs. The refere
nce parts of this desig
n are desig
nedwith lo
ng groove base.The product has smooth a
nd simple shape a
nd is draw
nwith UG three-dime
nsio
nal software.Duri
ng the drawi
ng process,the slope of the die must be co
nsidered to facilitate ejectio
n a
nd demouldi
ng.After the drawi
ng is completed,o
ne module a
nd two cavities are arra
nged accordi
ng to the requireme
nts to calculate the frame a
nd the
n determi
ne its parti
ng surface.The selectio
n of parti
ng surface also takes i
nto accou
nt the directio
n of demouldi
ng a
nd the shape of the part,aswell as the co
nve
nie
nce of machi
ni
ng the core cavitya
nd the u
niform force exerted bythe ejectio
n mecha
nism.Choose the i
nlet accordi
ng to the product arra
ngeme
nt a
nd material flowshri
nkage so that the filli
ng surface is free of material.Cooli
ng methods are determi
ned bythe layout of the mold desig
n product,ge
nerallyusi
ng awater pipe e
nclosure.Push-out mecha
nism usuallyuses dome
needle,whichwill leave a mark of ejectio
n.If there is
no mark of ejectio
n,push-out plate ca
n be used or model ha
nd ca
n be used to remove it.The selectio
n depe
nds o
n the use a
nd appeara
nce of the product.After three-dime
nsio
nal software drawi
ng is completed,two-dime
nsio
nal assemblydrawi
ng a
nd part drawi
ng are draw
n accordi
ng to the drawi
ng a
nd the
n usi
ng CAD.I
n thisway,it is
not easyto make mistakeswhe
n drawi
ng two-dime
nsio
nal assemblydrawi
ng.I
n the desig
n process,it is
necessaryto take i
nto accou
nt the die ma
nufacturi
ng process i
n the field of mecha
nical processi
ng,aswell as the co
nve
nie
nce of repairi
ng the safetyequipme
nt used i
n the die after ma
nufacture a
nd the co
nve
nie
nce of replaci
ng the damaged parts,which are i
ndispe
nsable to the desig
n process. Keywords: i
njectio
n mold; lo
ng groove base; demouldi
ng; o
ne module a
nd two cavities; frame; core; cavity 目录 摘要I Abstract II 第一章概述1 1.1模具的地位1 1.2模具的发展2 1.3注塑模具的重要性3 1.4课题需要解决的问题3 1.5设计思路4 第二章塑件工艺和材料分析5 2.1塑件结构分析5 2.2塑件的工艺分析5 2.3计算塑件的体积和质量6 2.4分型面的选择7 2.5塑料成型设备的选取7 第三章模具结构方案的确定9 3.1出模数量与型腔布局9 3.2型腔出模数量的校核9 3.3、浇注系统设计10 3.3.1浇注系统10 3.3.2主流道的设计10 3.3.3分流道的设计11 3.3.4浇口的设计12 3.3.5冷料穴的设计12 3.4排气机构的设计12 3.5脱模机构设计13 3.5.1脱模力的计算13 3.5.2推杆强度的校核14 3.6复位机构设计14 3.7模架系统设计14 第四章、成型零件结构设计16 4.1成型零件的设计16 4.2、型腔结构设计16 4.3、型芯结构设计16 4.4成型尺寸计算17 4.4.1型腔成型零件尺寸计算17 4.4.2型芯成型零件尺寸计算18 4.4.3型腔零件的强度刚度校核18 4.5成型零件钢材的选用19 第五章、模具冷却系统设计20 5.1、冷却系统概述20 5.2、冷却水道的计算20 5.2.1求塑料制品在固化时每小时释放的热量Q 20 5.2.2水的体积流量21 5.2.3求冷却水道直径d 21 第六章注塑机的选择与校核22 6.1注塑机的工作原理22 6.2注塑机注射容量的校核22 6.3校核压力22 6.4校核模具安装尺寸22 6.5校核移模行程23 6.6校核注塑机锁模力23 第七章、Moldlfow注塑CAE模流分析24 7.1 moldflow模流分析概述24 7.2 MOLDLFOW模流分析操作过程。24 7.4总体温度27 7.5注射位置处压力：XY图28 7.6锁模力XY图28 7.7压力29 7.8充填时间30 7.9流动前沿温度31 7.10气穴32 7.11熔接线33 7.12温度，零件34 7.13变形，所有因素：变形35 第八章、绘制模具总装图37 总结38 致谢39 参考文献40