Application of thermographic temperature measurements in injection molding and blow molding of plastics

Mark Prystay; Hao Wang; Andres Garcia-Rejon

doi:10.1117/12.235399

15 March 1996 Application of thermographic temperature measurements in injection molding and blow molding of plastics

Mark Prystay, Hao Wang, Andres Garcia-Rejon

Proceedings Volume 2766, Thermosense XVIII: An International Conference on Thermal Sensing and Imaging Diagnostic Applications; (1996) https://doi.org/10.1117/12.235399
Event: Aerospace/Defense Sensing and Controls, 1996, Orlando, FL, United States

Abstract

Infrared thermal analysis is used to characterize and optimize injection moulding and blow moulding of plastic parts colored with 2 - 4% carbon black. Thermographic and ultrasonic data show that during injection moulding shrinkage of the plastic in the mould creates a gap between the part and mould which produces a thermal contact resistance thereby reducing the cooling efficiency of the mould. The effect of shrinkage was minimized by using high packing pressures. Thermal analysis of blow moulding provides evidence of a 'skin' on the surface of the parison which affects the wetting of the part and mould. A high blow rate is required to maintain a parison that wets the mould surface well to promote the transfer of heat out of the part. In addition, under fixed operating conditions. The temperature field on thin walled parts can be used to obtain on-line thickness distributions and measure blow ratios. Results of the study have been applied to the analysis of automotive parts.

Citation Download Citation

Mark Prystay, Hao Wang, and Andres Garcia-Rejon "Application of thermographic temperature measurements in injection molding and blow molding of plastics", Proc. SPIE 2766, Thermosense XVIII: An International Conference on Thermal Sensing and Imaging Diagnostic Applications, (15 March 1996); https://doi.org/10.1117/12.235399

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available