摘要
毕业设计我们主要是设计“蘸水盒注射模具设计”。说明书主要讲述注塑蘸水盒的模具设计步骤和过程,蘸水盒是用注射模生产出来的。注射模是成型塑料制品的一种工艺设备。几乎所有的塑料都适用于注射模。任何注射模结构均可分为定模和动模两大部分，塑料制件的成型过程, 将已塑化的塑料熔体以一定的压力和速度注入闭合的模具型腔内，经冷却硬化定型后开模而获得制件。
注射前动模与定模闭合构成型腔和浇注系统。开模时,动模与定模分离,由脱模机构推出制品.本次防尘罩的设计使用到了侧向抽芯机构, 主要包括以下几个方面的内容：
（１）所选用的塑料材料—ABS的性能分析
（２）塑件的形状和尺寸及其精度，包括制件其本身尺寸精度的确定
（３）计算型腔数目及选择注射机型号
（４）成型零件的设计及计算和模具型腔壁厚的计算
（５）浇注系统的设计及计算，确定浇口形式和位置，决定主流道，分流道和冷料井的形式及尺寸
（６）分型抽芯机构的设计及计算
（７）冷却系统的设计计算（包括孔径和孔数的计算）
（８）脱模机构的设计及计算
（９）分型面选择的一般原则
（10）注射机和注射模具的关系校核
（11）注射成型工艺的确定，包括注射各阶段的时间，压力，温度
关键词：蘸水盒、注射模
Abstract
We mainly to design the graduation project “The reposition of redundant personnel slot cover outside the direction finder injects the molding tool ”. This article mainly describes the design procedure of sundries casement. Inject mould shaping’s one technology equipment of plastic, it use in shaping mould one by hot plasticity, have and use in shaping mould one by hot careless quality too mainly. Any mould divide into for fixing mould and work up mould two major part.The injection molding procedure is a process that make use of screw or plunger` s shoot, inject the plastic melt into closed mould, then open the mould and gain the product when the melt freezing.
Work up mould with definitely mould close forming type and power the system before injecting. It turns on mould work up with definitely mould separate, put out the goods mould pieces of material performance, this graduation design use exhaust structure. The content involved mainly includes following:
The plastic material selected for use—ABS.
It moulds volume and calculation of quality of one making pieces of basic size and size.
Sureness of precision. S of figure of calculating etc. and choose type of injecting etc.
Shaping manufacture calculation and moulds of wall thick calculation of size of part.
It designs system of pouring determine runner form and position and determine mainstream one and shunt one and cold material form and size of well.
The design of Later typing take-out core .
Cool the system of design (includes the calculation that the aperture and hole count).
The design of the structure of drawing of patterns.
Lead the design of the structure and determine the standard mould shelves that are selected for use.
The performance parameter of injecting machine is checked.
Draft and inject the technology scheme, determine to inject the time of every stage, the pressure, the speed of the thermometer.
【key words】：Direction finder Outside cover Injection mold
目 录
1、前言 1
2、蘸水盒结构三维软件分析 2
3、塑料制品的分析及零件材料的选择和性能 4
3.1、塑件的结构分析及表面质量分析 4
3.2、材料的选择 5
3.3、塑件体积的计算 6
4、注射机的选择及校核 6
4.1、注射机的选择 6
4.2、注射机的校核 6
4.3、锁模力的校核 7
4.4、注射压力的校核 7
5、模架的选取 8
5.1、模架的选取 8
5.2、确定模板尺寸 8
5.3、模具闭合厚度的校核 9
6、成型部分设计 9
6.1、型腔和型芯尺寸的计算 9
6.2、型腔壁厚与底板厚度的计算 12
7、浇注系统的设计 14
7.1、浇口形式 14
7.2、浇口尺寸计算 14
7.3、排气系统的设计 15
8、脱模机构的设计 15
8.1、脱模力的计算 15
8.2、顶杆的设计 16
9、导向机构的设计 16
9.1、导向机构的作用 16
9.2、导向机构的设计原则 17
9.3、导柱和导套的形式 17
10、抽芯机构的设计 17
11、冷却系统的设计 17
11.1、热量的计算 17
11.2、冷却水量的计算 18
11.3、冷却水管直径的计算 19
11.4、冷却水道数量 20
总 结 21
参考文献 22
致 谢 23
