摘要:此次毕业设计论文的题目是松下微波炉透镜塑料模设计。课题来源于微波炉零件的实际生产需求,是大批量生产。材料为ABS其综合性能优异,ABS材料具有超强的易加工性,外观特性,低蠕变性和优异的尺寸稳定性以及很高的抗冲击强度。本塑件是微波炉内部结构零件,尺寸较小,要求控制熔接线开裂风险,外观拉伤,外观面无明显视觉缺陷。侧面无孔,斜面不影响脱模,因此无需使用侧向分型抽芯机构,在设计模具时必须考虑这些影响因素与注塑条件的关系及其表观因素。由于此零件是非外观零件,模具结构应尽可能简单,提高生产效率。该零件采用一模四腔的结构,分型面选在最大截面处,采用侧浇口,无需排气系统,用顶针推出零件。19708
关键词: 塑料透镜;高效生产;注射模
Injection mold Design of Panasonic Microwave lens
Abstract: The graduation thesis topic is Injection mold Design of Panasonic Microwave lens.The subject comes from the needs of microwave components actual production,and the component is mass production.The material is ABS its comprehensive performance is excellent, ABS material with superior ease of processing, visual characteristics, low creep and excellent dimensional stability and high impact strength.The lens is internal structure of microwave,small size, required to control the risk of cracking of weld lines, the appearance of injury and no obvious visual defects.There is no hole on the side of lens and the cant does not affect the stripping so itdoes not need to use the side core pulling mechanism, these factors must be considered in the design of mold and injection molding conditions and its apparent factor. Because it is not the appearance of parts, the mold structure should be as simple as possible to increase the productivity. The parts are made of the structure of a four cavity mold parting surface in the largest sub-plane, edge gate, no exhaust system, introduced parts to use thimble.
Key words: Plastic lens; Efficient production; Injection mold
目 录
1 绪论1
1.1 模具工业概况1
1.2 我国塑料模具工业技术现状及地区分布1
1.3 选题的背景意义3
2 分析塑件结构工艺性4
2.1 熟悉塑件及其材料性能4
2.1.1 塑件材料特性4
2.1.2 塑件材料成型性能5
2.2 塑件工艺性分析6
2.2.1 塑件结构6
2.2.2 尺寸精度7
2.2.3 表面粗糙度7
2.2.4 脱模斜度8
2.2.5 塑件壁厚8
2.2.7 塑件圆角9
2.3 塑件成型工艺参数9
3 注射模具设计10
3.1 初步选择注射成型设备11
3.2 初步拟定模具结构12
3.2.1 分型面的选择12
3.2.2 型腔数目的确定及型腔的布局13
3.3 成型零部件设计13
3.3.1 成型零部件结构设计14
3.3.2 型芯和型腔工作尺寸的计算14
3.4 模架及标准件的选用16
3.4.1 确定模架组合形式16
3.4.2 检验所选模架16
3.5 浇注系统设计17
3.5.1 浇注系统形式17
3.5.2 主流道设计17
3.5.3 分流道设计18
3.5.4 浇口设计19
3.5.5 冷料井设计20
3.6 确定排气系统21
3.7 推出机构设计21
3.7.1 推出力的计算21
3.7.2 推杆强度校核22
3.7.3 复位机构22
3.8 温度调节系统设计23
3.8.1 模具温度24
3.8.2 冷却装置24
4 模具材料的选择25
结论26
谢辞27
参考文献28