Gas evolution from resin-bonded sand cores prepared by various processes

Authors

  • B. Zhang
  • M. Garro
  • D. Chautard
  • C. Tagliano

Abstract

The present work is focused on the measurement of the rate and amount of gases evolved from various cores for aluminium casting. Specimens were selected from normal production at Carmagnola Plant of Teksid Aluminium, including furanic hot-box cores, phenolic shell-molding cores and phenolic isocyanate-urethane cold-box cores with different percentages of resins. The results show that the volume of gas evolution increased with temperatures and the rate of gas evolution, for any categories of cores, was more remarkable at higher temperature. A light increase of resin contents in cold-box cores caused a much higher increase of gas evolution. Moreover, furanic hot-box cores showed an early and rapid evolution and reached their peak evolution earlier than cold-box ones. The data obtained from this study can be used to explain the gas-related problems for aluminium casting and, as references, to modify the resin contents and the proportion of different resins in normal production.

Downloads

Published

2013-09-05

Issue

Section

Articles