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一模四腔的塑料模具设计
目 录
第一章 拟定模具结构形式·······················································································1
第一节 确定型腔数量及排列方式··········································································1
第二节 模具结构形式的确定··················································································1
第二章 注射机型号的确定·······················································································2
第三章 分型面位置的确定····················································································2
第四章 浇注系统形式和浇口的设计·····································································3
第一节 主流道设计··································································································3
1. 主流道尺寸······································································································3
2. 主流道衬套的形式··························································································3
3. 主流道衬套的固定·······························································································4
第二节 分流道设计··································································································5
1. 主分流道的形状及尺寸··················································································5
2. 主分流道长度··································································································6
3. 副分流道的设计······························································································6
4. 分流道的表面粗糙度······················································································6
5. 分流道的布置形式··························································································7
第三节 浇口的设计··································································································7
1. 浇口的选用······································································································8
2. 浇口位置的选择······························································································9
第四节 浇注系统的平衡························································································10
第五节 冷料穴的设计····························································································10
第五章 成型零件的设计与加工工艺··································································11
第一节 成型零件的结构设计·········································································· 11
1. 前模仁的设计································································································ 11
2. 行位1 的设计································································································12
3. 行位2 的设计································································································17
4. 后模仁的设计································································································21
5. 后模仁镶件的设计························································································26
第二节 成型零件的加工工艺················································································29
1. 前模仁的加工工艺························································································30
2. 行位1 的加工工艺························································································31
3. 其它成型零件的加工····················································································40
第六章 侧向分型与抽芯机构的设计································································40
第一节 侧向分型与抽芯机构的分类····································································40
第二节 抽芯距确定与抽芯力计算········································································41
第三节 斜导柱侧向分型与抽芯机构设计····························································41
1. 导柱的设计····································································································42
2. 导滑槽的设计································································································45
3. 楔紧块的设计································································································46
4. 滑块定位装置设计························································································47
第七章 脱模推出机构的设计·······································································47
第八章 模架选用与合模导向机构的设计·······················································48
第九章 模具的试模与修模···················································································49
第一节 粘着模腔····································································································49
第二节 粘着模芯····································································································49
第三节 粘着主流道································································································49
第四节 成型缺陷····································································································50
第十章 模具的动作过程·····················································································51
【摘要】 通过对电动机绝缘胶架工艺的正确
分析
定性数据统计分析pdf销售业绩分析模板建筑结构震害分析销售进度分析表京东商城竞争战略分析
，设计了一副一模四腔的塑料模具。详细地叙述了模具成型零件包括前
模板
个人简介word模板免费下载关于员工迟到处罚通告模板康奈尔office模板下载康奈尔 笔记本 模板 下载软件方案模板免费下载
、前模仁、后模板、后模仁、后模镶件、斜导柱、滑块等的设计与加工工艺过程，重要零件的工艺参数的选择与计算，推出机构与浇注系统以及其它结构的设计过程，并对试模与产品缺陷作了介绍。
【Abstract】 A set of mould with one module and four cavities has been
designed through the correct analysis of the technology of insulated
pastern support of motor in the graduate design. The design and
machining technology process of its molding part including the front
moulding plate、front mould kernel、back mould plate、back mould
kernel、back mould set piece、incline guide pin、slide steatite etc, and the
choice and calculation of technology parameters of the impotent part,
the design process of extrusion outfit, inject system and other makeup are
specified in detail; Test and product have been introduced.
前 言
大学二年的学习即将结束，毕业设计是其中最后一个环节，是对以前所学的知识及所掌握的技能的综合运用和检验。随着我国经济的迅速发展，采用模具的生产技术得到愈来愈广泛的应用。在完成大学二年的课程学习和课程、生产实习，我熟练地掌握了机械制图、机械设计、机械原理等专业基础课和专业课方面的知识，对机械制造、加工的工艺有了一个系统、全面的理解，达到了学习的目的。对于模具设计这个实践性非常强的设计课题，我们进行了大量的实习。经过在益阳无线电六厂、湖南益阳气缸垫有限公司等几家单位的生产实习，尤其是在深圳市沙井镇大和滤芯制品厂工模部长达三个月的毕业实习，我对于模具特别是塑料模具的设计步骤有了一个全新的认识，丰富了各种模具的结构和动作过程方面的知识，而对于模具的制造工艺更是实现了零的突破。在指导老师的协助下和在工厂师傅的讲解下，同时在现场查阅了很多相关资料并亲手拆装了一些典型的模具实体，明确了模具的一般工作原理、制造、加工工艺。并在图书馆借阅了许多相关手册和书籍，设计中，将充分利用和查阅各种资料，并与同学进行充分讨论，尽最大努力搞好本次毕业设计。在设计的过程中，将有一定的困难，但有指导老师的悉心指导和自己的努力，相信会完满的完成毕业设计任务。由于学生水平有限，而且缺乏经验，设计中不妥之处在所难免，肯请各位老师指正。
设计者：林 军
二OO六 年 五 月
一. 拟定模具结构形式
A. 确定型腔数量及排列方式
型腔的数量是由厂方给定，为“一出四”即一模四腔，他们已考虑了本产品的生产批量（大批量生产）和自己的注射机型号。因此我们设计的模具为多型腔的模具。考虑到模具成型零件和抽芯结构以及出模方式的设计，模具的型腔排列方式如下图所示：
图 (1)
B. 模具结构形式的确定
由于塑件外观质量
要求
对教师党员的评价套管和固井爆破片与爆破装置仓库管理基本要求三甲医院都需要复审吗
高，尺寸精度要求一般，且装配精度要求高，因此我们设计的模具采用多型腔多分型面。根据本塑件电动机绝缘胶架的结构，模具将会采用三个分模面，三个分型面。
二. 注射机型号的确定
一般工厂的塑胶部都拥有从小到大各种型号的注射机。中等型号的占大部分，小型和大型的只占一小部分。所以我们不必过多的考虑注射机型号。具体到这套模具，厂方提供的注射机型号和规格以及各参数如下：
注射量：95g
锁模力：120T
模板大小：400×550
开模距离：
推出形式： 推出位置： 推出行程：
三. 分型面位置的确定
如何确定分型面，需要考虑的因素比较复杂。由于分型面受到塑件在模具中的成型位置、浇注系统设计、塑件的结构工艺性及精度、嵌件位置形状以及推出
方法
快递客服问题件处理详细方法山木方法pdf计算方法pdf华与华方法下载八字理论方法下载
、模具的制造、排气、操作工艺等多种因素的影响，因此在选择分型面时应综合分析比较，从几种方案中优选出较为合理的方案。选择分型面时一般应遵循以下几项原则：
1) 分型面应选在塑件外形最大轮廓处。
2) 便于塑件顺利脱模，尽量使塑件开模时留在动模一边。
3) 保证塑件的精度要求。
4) 满足塑件的外观质量要求。
5) 便于模具加工制造。
6) 对成型面积的影响。
7) 对排气效果的影响。
8) 对侧向抽芯的影响。
其中最重要的是第5）和第2）、第8）点。为了便于模具加工制造，应尽是选择平直分型面工易于加工的分型面。如下图所示，采用A－A 这样一个平直的分型面，前模（即定模）做成平的就行了，胶位全部做在后模（即动模），大简化了前模的加工。A－A 分型面也是整个模具的主分模面。下图中虚线所示的B－B 和C－C 分型面是行位（即滑块）的分型面。这样选择行位分型面，有利于线切割行位以及后模仁和后模镶件这些成型零件。分型面的选择应尽可能使塑件在开模后留在后模一边，这样有助于后模设置的推出机构动作，在下图中，从A－A 分型，了B－B 处的行位向左移开，C－C 处的行位向右移开后，由于塑件收缩会包在后模仁和后模镶件上，依靠注射机的顶出装置和模具的推出机构推出塑件。
图 (2)
四. 浇注系统形式和浇口的设计
A. 主流道设计
1. 主流道尺寸
主流道是一端与注射机喷嘴相接触，另一端与分流道相连的一段
带有锥度的流动通道。主流道小端尺寸为3.5～4mm。
2. 主流道衬套的形式
主流道小端入口处与注射机喷嘴反复接触，属易损件，对材料要
求较严，因而模具主流道部分常设计成可拆卸更换的主流道衬套形式
（俗称浇口套，这边称唧咀），以便有效的选用优质钢材单独进行加工
和热处理。唧咀都是标准件，只需去买就行了。常用唧咀分为有托唧
咀和无托唧咀两种下图为前者，有托唧咀用于配装定位圈。唧咀的规
格有Φ12，Φ16，Φ20 等几种。由于注射机的喷嘴半径为20，所以唧
咀的为R21。
图 (3)
3. 主流道衬套的固定
因为采用的有托唧咀，所以用定位圈配合固定在模具的面板上。定位圈也是标准件，外径为Φ120mm，内径Φ35mm。具体固定形式如下图所示：
B. 分流道设计
在多型腔或单型腔多浇口（塑件尺寸大）时应设置分流道，分流道是指主流道末端与浇口之间这一段塑料熔体的流动通道。它是浇注系统中熔融状态的塑料由主流道流入型腔前，通过截面积的变化及流向变换以获得平稳流态的过渡段。因此分流道设计应满足良好的压力传递和保持理想的充填状态，并在流动过程中压力损失尽可能小，能将塑料熔体均衡地分
配到各个型腔。
1. 主分流道的形状及尺寸
主分流道是图（6）中水口板下水平的流道。为了便于加工及凝料脱模，分流道大多设置在分型面上，分流道截面形状一般为圆形梯形U 形半圆形及矩形等，工程设计中常采用梯形截面加工工艺性好，且塑料熔体的热量散失流动阻力均不大，一般采用下面的经验公式可确定其截面尺寸：
式中 B―梯形大底边的宽度（mm）
m―塑件的重量（g）
L―分流道的长度（mm）
H―梯形的高度（mm）
梯形的侧面斜角a 常取，在应用式（式1）时应注意它的适用范围，即塑件厚度在3.2mm 以下，重量小于200g，且计算结果在3.2－9.5mm 范围内才合理。
本电动机绝缘胶架的体积为3221.7324mm3，质量大约4g，分流道的长度预计设计成140mm 长，且有4 个型腔，所以：
梯形小底边宽度取6mm，其侧边与垂直于分型面的方向约成100。另外由于使用了水口板（即我们所说的定模板和中间板之间再加的一块板），分流道必须做成梯形截面，便于分流道和主流道凝料脱模。实际加工时实，常用两种截面尺寸的梯形流道，一种大型号，一各小型号。如下图所示：
2. 主分流道长度
分流道要尽可能短，且少弯折，便于注射成型过程中最经济地使用原料和注射机的能耗，减少压力损失和热量损失。将分流道设计成直的，总长140mm。
3. 副分流道的设计
副分流道即图（6）中的主分流道以下的两个土字形的流道副分流道中竖直方向上有锥度的流道的锥度为单边20，其最底部直径为φ6mm，水平方向上下两层流道的直径为φ4mm，这些都是根据经验取值，其总长度为38.15mm。
4. 分流道的表面粗糙度
由于分流道中与模具接触的外层塑料迅速冷却，只有中心部位的塑料熔体的流动状态较为理想，因面分流道的内表面粗糙度Ra 并不要求很低，一般取1.6μm 左右既可，这样表面稍不光滑，有助于塑料熔体的外层冷却皮层固定，从而与中心部位的熔体之间产生一定的速度差，以保证熔体流动时具有适宜的剪切速率和剪切热。
另外本人甩卖全部机械毕业设计5元一份（全部甩卖）
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