Finite size gap effects on the modeling of thermal contact conductance at polymer-mold wall interface in injection molding

L. Sridhar, Kwabena Narh

Research output: Contribution to journalArticlepeer-review

10 Scopus citations

Abstract

Heat transfer in polymer processing by injection molding is affected by the thermal contact conductance at the interface between the polymer and the metal mold. The modeling of thermal contact conductance at such interfaces is simplified by the assumption of an isothermal condition at the two contacting surfaces. In this study we examine the validity of such an assumption for the case of an interface involving plastic (a low thermal conductivity material) and metal (a high thermal conductivity material). The study shows that at such an interface between materials of widely varying thermal conductivity, the conditions at the interface depart from the isothermal assumption, with the heat flux becoming more uniform and the temperature difference varying by a larger magnitude across the contact plane. This effect is more pronounced as the width of the gaps increases for the same area of contact. This suggests that the modeling of the contact conductance should be based on average temperatures for the contacting surfaces.

Original languageEnglish (US)
Pages (from-to)1776-1782
Number of pages7
JournalJournal of Applied Polymer Science
Volume75
Issue number14
DOIs
StatePublished - Jan 1 2000

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Surfaces, Coatings and Films
  • Polymers and Plastics
  • Materials Chemistry

Fingerprint Dive into the research topics of 'Finite size gap effects on the modeling of thermal contact conductance at polymer-mold wall interface in injection molding'. Together they form a unique fingerprint.

Cite this