FLAME RESISTING HEAT-TREATING APPARATUS FOR YARN

摘要

PROBLEM TO BE SOLVED: To provide a flame resisting and heat-treating apparatus capable of further improving the uniformization and acceleration of the flame resisting and heat treatment without deteriorating the handleability of a yarn in a heat- treating chamber and realizing an improvement in passableness and productivity of subsequent steps. SOLUTION: This heat resisting and heat-treating apparatus 1 has a heat- treating chamber 2 in which many yarns 7 run in a sheetlike form in the horizontal direction side by side. Hot air is introduced from the upper wall 2a into the heat-treating chamber 2 and the hot air is forcibly led out of the lower wall 2b. Further, plural hot air circulating chambers 3 surrounding the four sides of the heat-treating chamber 2 are arranged in the yarn running direction of the heat-treating chamber 2. The hot air circulating chambers 3 are capable of making the upper wall 2a which is a hot air introducing part communicate with the lower wall 2b that is a hot air leading out part. A circulating zone 3a having a heater 5 and a hot air circulating fan 6 is formed between the upper wall 2a and the lower wall 2b and a heat insulating zone 3b is formed on the side opposite the circulating zone 3a.