Paper Title:
An Investigation on Warpage Analysis in Plastic Injection Moulding
  Abstract

In an injection moulded part, warpage is the distortion caused by non-uniform shrinkage within the plastic part. When looking critically at the causes of warpage, it is found that several key parameters of the moulding process have some effect on the warpage. However, the two major categories that contribute to warpage include the part design and the mould design. In mould design, the gate location, runner/gate system and cooling system design are the major factors affecting not only the warpage and part quality but also the injection moulding cycle time. This paper presents an investigation of using different cooling system configuration on warpage and shrinkage of an industrial plastic part with the aim of determining which cooling configuration will provide minimum warpage and cycle time. As conventional injection mould cooling design is based on straight drilling, it limits the geometric complexity of the cooling design, especially curved shape cooling channels. Nowadays, new technology of advanced rapid tooling based on solid freeform fabrications can be been used to provide conformal cooling channels in injection moulds. In this paper, several type of cooling channels are analysed to compare the performance in terms of warpage and shrinkage and to determine which configuration is suitable for minimizing warpage. Autodesk Moldflow Insight (AMI) simulation software is applied to examine the results of the cooling performances and warpage analysis.

  Info
Periodical
Advanced Materials Research (Volumes 264-265)
Edited by
M.S.J. Hashmi, S. Mridha and S. Naher
Pages
433-438
DOI
10.4028/www.scientific.net/AMR.264-265.433
Citation
A. B.M. Saifullah, S. H. Masood, "An Investigation on Warpage Analysis in Plastic Injection Moulding", Advanced Materials Research, Vols. 264-265, pp. 433-438, 2011
Online since
June 2011
Export
Price
$32.00
Share

In order to see related information, you need to Login.

In order to see related information, you need to Login.

Authors: Abul B.M. Saifullah, Syed H. Masood
Abstract:Cooling channel design is important in mould designs to achieve shorter cycles, dimensional stability and reduced part stresses....
1999
Authors: Ying Ping Qian, Yong Wang, Ju Hua Huang, Xi Zhi Zhou
Chapter 2: Advanced Manufacturing Technology
Abstract:The cooling process of injection molding is a complicated process related to thermodynamics and hydrodynamics, and it has a direct impact on...
502
Authors: Norshah Afizi Shuaib, M. Fathullah, Z. Shayfull, S.M. Nasir, M.F.M.A. Hamzas
Chapter 6: Composites and Polymer Materials
Abstract:Warpage is a type mold defect due to non-uniform temperature variation which causes differential shrinkage rate on the moulded parts. An...
676
Authors: Guo Qiang Gao, Yu Shan Liu, Yu Jun Cai
Chapter 4: Applied Mechanic, Mechanical Engineering, Automation and Control
Abstract:In view of the cooling difficulty in complex injection mold, the difference between conventional cooling channels and Conformal Cooling...
630