找回密码 注册 QQ登录
一站式解决方案

iCAx开思网

CAD/CAM/CAE/设计/模具 高清视频【积分说明】如何快速获得积分?快速3D打印 手板模型CNC加工服务在线3D打印服务,上传模型,自动报价
查看: 19663|回复: 5
打印 上一主题 下一主题

[分享] THE WARPAGE SIMULATION WITH IN-MOLD CONSTRAINT EFFECT IN INJECTION MOLDING

[复制链接]
跳转到指定楼层
1
发表于 2009-10-13 11:12:14 | 只看该作者 回帖奖励 |倒序浏览 |阅读模式

马上注册,结交更多同行朋友,交流,分享,学习。

您需要 登录 才可以下载或查看,没有帐号?注册

x
THE WARPAGE SIMULATION WITH IN-MOLD CONSTRAINT EFFECT IN INJECTION MOLDING
注塑成型模內干涉翹曲模擬分析


Yi-Hui Peng*, David C.Hsu and Venny Yang
CoreTech System Co.,Ltd., HsinChu, Taiwan 300, ROC
Rong-Yeu Chang
National Tsing-Hua University, HsinChu, Taiwan 30043, ROC


Abstract

This paper develops a new numerical approach to simulating the mold constraint phenomenon of warpage at the in-mold stage in injection-molded part of complex
geometry and improves the accuracy of warpage analysis. Warpage in injection molding is the result of unequal volumetric shrinkage of material throughout the geometry of the piece as it cools from a melt to a solid state. Before the part is ejected, the deformation of warpage has been developed inside the mold. The influence of in-mold constraint for warpage is different according to the time of in-mold period. This in-mold constraint effect of warpage analysis technique is proved to improve the accuracy of warpage analysis for 3D/2.5D model. Several industrial cases with complex geometry are also studied to illustrate the capability of the proposed methodology.

Introduction

Warpage in injection molding is the result of unequal volumetric shrinkage of material throughout the geometry of the piece as it cools from a melt to a solid state. Before the part is ejected, the deformation of warpage has been developed inside the mold. The
influence of in-mold constraint for warpage is different according to the time of in-mold period. In general the warpage will be smaller when the in-mold period is
longer. The conventional warpage analysis doesn’t consider the in-mold constraint effect. The part is free deformation after the melt fill the part. When the cooling period become longer, the conventional warpage analysis will lose more real phenomena. The warpage with in-mold constraint effect is complicated phenomena. The contact behavior will be induced between rigid mold and plastic part. The part can’t shrink and warp freely at in-mold stage due to the rigid mold. Besides, this contact behavior also induces the stress of part. This paper develops a numerical approach to simulating the in-mold constraint effect for warpage analysis in injection-molded part of complex geometry.

本帖最后由 lrbheyuan 于 2009-11-10 17:31 编辑

评分

参与人数 1技术 +1 大米 +10 收起 理由
lrbheyuan + 1 + 10 我很赞同

查看全部评分

分享到:  QQ好友和群QQ好友和群 QQ空间QQ空间 腾讯微博腾讯微博 腾讯朋友腾讯朋友
收藏收藏1 分享淘帖 赞一下!赞一下!
2
 楼主| 发表于 2009-10-13 11:15:33 | 只看该作者

本帖子中包含更多资源

您需要 登录 才可以下载或查看,没有帐号?注册

x
3
 楼主| 发表于 2009-10-13 11:20:36 | 只看该作者

马上注册,结交更多同行朋友,交流,分享,学习。

您需要 登录 才可以下载或查看,没有帐号?注册

x
4
 楼主| 发表于 2009-10-13 11:22:06 | 只看该作者

本帖子中包含更多资源

您需要 登录 才可以下载或查看,没有帐号?注册

x
5
 楼主| 发表于 2009-10-13 11:24:26 | 只看该作者

本帖子中包含更多资源

您需要 登录 才可以下载或查看,没有帐号?注册

x
6
发表于 2012-8-16 21:11:31 | 只看该作者

马上注册,结交更多同行朋友,交流,分享,学习。

您需要 登录 才可以下载或查看,没有帐号?注册

x
您需要登录后才可以回帖 登录 | 注册

本版积分规则

3D打印手板模型快速制作服务,在线报价下单!

QQ 咨询|手机版|联系我们|iCAx开思网  

GMT+8, 2024-11-6 21:38 , Processed in 0.025232 second(s), 13 queries , Gzip On, Redis On.

Powered by Discuz! X3.3

© 2002-2024 www.iCAx.org

快速回复 返回顶部 返回列表