盒盖连体零件注塑模具设计

本科毕业设计（论文）题目：盒盖连体零件注塑模具设计

系别：机电信息系

专业：机械设计制造及自动化

班级：

学生：

学号：

指导老师：

2013年5月

盒盖连体零件注塑模具设计

摘要

从分析塑料零件注射模具设计的全过程，并从其加工工艺性出发，选取了较为合理的设计方案，经工艺计算并初步确定模具结构方案，最后进行模具各个部分零件的设计。由于本产品结构比较复杂，模具结构及制造工艺相对较为复杂，生产批量为大批量，精度为IT14，则成本会比较高。且模具采用的是一模两腔的设计，所以增加了结构的复杂性，通过对抽芯机构的计算和设计，同时把握模具相关运动部件的设计，其中包括定位零件和成型零件尺寸的计算和校核。该模具采用了一次分型，使制件的主流道凝料和分流道凝料从模具的成型板中脱出，最后利用推杆推出作用，使制件脱离型芯，达到制件的生产。同时，本模具的亮点和难点在于有两个带角度的内侧抽芯和其型芯型腔的加工复杂性上，但通过比较合理的斜顶装置可以很完善的达到内抽的效果，并且该机构制造相对简单，可降低模具成本。在一些零件的选用上也是尽量选取标准件以降低模具造价，型芯和型腔都采用镶拼式的结构，同时运用直通式冷却水道，降低加工难度和成本。最后分析模具装配和型腔的加工工艺性。

关键词：注塑模；分型面；抽芯

The Plastic Mold Design of Box Cover

Abstract

From the analysis of the whole process of the design of plastic pates injection mold, and departure from its processing technology, select a more reasonable design, the process calculation and initially identified the mold structure of the program, the final design of some parts of the mold. Due to the product structure is more complex, the mold structure and manufacturing process is relatively complex, production volume in bulk, the accuracy of IT10, the cost will be higher. The die is used to design a mold two cavity, so increases the complexity of the structure, calculation and design of the core-pulling mechanism, and grasp the mold moving parts design, including the calculation of the size of positioning parts and molded parts and checked. Spure slug and shunt used in the mold of the type, so that the parts of the slug of the mold forming board last putter introduced the roleof the parts off the core, to achieve the production of parts. At the same time, the highlight and difficulty of this mold is processing complexity two angled inside core-pulling and its core cavity, but more reasonable lifter device can be improved to achieve the pumping effect, and the organization to produce relatively simple, can reduce the cost of the mold. Also try to select in some parts of the slection of standard parts to reduce tooling cost, core and cavity mosaic structure, while the use of straight-through cooling water, reducing the processing difficulty and cost. Finally, analysis and processing of the mold assembly and cavity.

Keywords: Plastic injection molding；once；medial to the core-pulling

主要符号表

k安全系数E材料弹性模量

S max塑料的最大收缩率q熔融塑料在模腔内的压力

S min塑料的最小收缩率V塑塑件体积

P0注射压力V注注射机理论注射量

P公公称注射压力F锁锁模力

Δs 塑件公差δs塑件收缩引起的塑件尺寸误差T注射机的额定锁模力L S 塑件尺寸

L凹型腔尺寸L凸型芯尺寸

H塑塑件內形深度基本尺寸S 注射机最大行程

d 塑件外径基本尺寸H 模具闭合尺寸

D 塑件內形基本尺寸H min模具最小尺寸

h凸模/型芯高度尺寸H max模具最大尺寸

δ模具制造公差α倾斜角

A塑件包紧型芯的侧面积p单位面积塑件对型芯的正力F 塑件的投影面积n 个数

P 型腔压力 f 摩擦系数

φ长度系数Q 总脱模力