摘要KT温控器上盖若采用普通浇注系统设计的模具生产，则易出现因浇注系统设计不当，造成填充不均、翘曲变形和熔接痕等，导致塑件质量、外观较差，且流道废料多，不经济。而采用热流道技术便会解决这个问题。本论文对产品KT温控器上盖进行一模四腔的热流道注塑模具设计。用Pro/E对KT温控器上盖注塑模具进三维实体设计，包括热流道浇注系统，成型零部件结构、侧抽机构、推出机构、导向机构、结构零部件等。利用模流分析软件MOLDFLOW对三种浇注系统方案分别仿真与对比分析，得出了最佳的成型方案。通过对均匀试验设计，得到最佳的注塑工艺参数。并对保压曲线进行优化，从而进一步降低塑件的翘曲变形。最后通过有限元软件ANSYS分析该热流道模具温度场，通过分析结果对比取得加热元件的最佳加热参数。69195

毕业论文关键词：热流道  MOLDFLOW模流分析  工艺参数优化  ANSYS温度场  均匀试验设计   

Design of injection mold for KT thermostat upper cover

Abstract

KT thermostat cover is designed and produced by the common gating system injection mold,which results in filling ,warpage and weld line etc easily.Due to improper design of gating system, the quality of plastic parts and appearance will be bad, and runner waste is to much. But hot runner technology will solve this problem. In this paper, the hot runner injection mold with four cavities of KT thermostat upper cover. Three dimensional design of injection mold for KT thermostat upper cover is designed based on Pro/E, including injection mold runner system,molding parts structure,the side core pulling mechanism,the ejecting mechanism , exhaust structure, guiding mechanism, structural parts and temperature controlling system, etc..The simulation and analysis of three kinds of gating systems were simulated and compared by using the model flow analysis software MOLDFLOW, and the best casting system scheme was determined. Through the uniform design of the parameters of the injection molding process, the best parameters of the injection molding process were obtained, and the deformation of the plastic part was further reduced by optimizing the holding pressure curve.By using the finite element analysis software ANSYS to analyze the temperature field of the hot runner mold, the optimum heating parameters of the components of the hot runner system were obtained.

Key Words: Hot runner  Injection mold  MOLDFLOW analysis  Uniform test design  Process parameters optimization  ANSYS temperature field finite  

目  录

摘  要 I

Abstract II

1 绪论 1

1.1 研究目的和意义 1

1.2 课题研究现状 1

1.3 课题研究主要内容、实施方案及创新点 2

1.4 本章小结 4

2 模具总体方案设计 5

2.1 塑件工艺性分析 5

2.2 型腔数量的确定 7

2.3注塑机的选择 8

2.4分型面的选择 9

2.5本章小结 10

3 基于MOLDFLOW浇注系统设计与对比 11

3.1普通浇注系统设计 11

3.2热流道浇注系统设计 14