矿泉水瓶热流道注射模具设计

成都理工大学工程技术学院毕业论文

矿泉水瓶坯热流道注射模具的设计

姓名：XXX

专业：XXX

指导老师：XXX

摘要

这篇论文是对大批量生产的饮料瓶坯进行了热流道注射模具的设计，瓶坯材料为PETP，其熔点较高（260℃左右）。注射成型温度范围较窄，如果一模多腔采用普通的浇注系统，PET熔料的流动性大大下降，甚至凝固。所以只有通过热流道注射成型才可以实现。采用一模两腔加工。对流道直径的设计主要参考了苏娟华的一篇相关论文，对直径进行了优化设计，并利用最小二乘法，对PET塑料的表观粘度和剪切速率关系进行公式化拟合。优化设计的结果与实际应用的热流道之间的最佳经验值接近。根据塑件的特点，模具的侧向分型采用了两跟斜导柱。

关键词：热流道优化设计PET瓶坯侧向分型

Abstract

This paper deals with the injection mould with hot runner to inject PET bottles, which leads to higher productivity.

The material of bottles is PETP which with a higher melting point, about 260℃around, so it has a narrow range of mounding temperature .If we adopt ordinary mounding System to produce bottles which have more moulds in a cavity.

The fluidity of the melting material of PET will greatly decline; indeed freeze, so we adopt injection mould with hot runner to complete the production. The design to the diameter of hot runner and hot gate was consult a paper from Su Juanhua. It deals with the optimal diameter design in injection mould. The computational results of the optimal programming are found to be in good agreement with the experiential data. The work performed in this paper will make a contribution to the application of the hot runner in injection mould. The mould adopts two oblique pillars to detach the mould based the characteristic of the bottles.

Key words:hot runners, Optimization, PET bottles, lateral detach the mould

目录

摘要 I

Abstract II

1前言 1

2 塑件的工艺分析，模具结构方案的确定、设备的校核 2

2.1塑料工艺分析、填写工艺卡 2

2.2确定模具方案 5

2.3注射机的选择和校核 7

3 浇注系统的设计 10

3.1热流道板的设计 10

3.2浇口套的设计 15

3.3定位圈的设计 16

3.4排溢系统的设计 17

4成型零部件的设计和校核 18

4.1凸模的设计和校核 18

4.2型腔的设计和校核对 18

5导向机构的设计 20

5.1导柱导套的配合 20

5.2导柱的设计和校核 20

5.3导套的设计与校核 21

6 侧向机构的设计 22

6.1滑块的设计 22

6.2斜销的设计与校核 22

7 冷却系统的设计 25

7.1冷却系统的设计原则 25

7.2计算 25

8 结构件的设计 27

8.1模板，固定板，垫块的设计 27

8.2紧固件和定位件的设计 27

8.3吊环螺钉的设计 27

8.4模具加工和注意事项 27