All roller haze type heat treatment furnace

摘要

Problem to be solved: to prevent the scraping of the heat treated material caused by the contraction of the heat treated object by cooling by adopting the conveying roller means as the transfer means of the cooling chamber, and to facilitate the adjustment of the conveying speed, while the other is the same. Since the volume of the transfer chamber, which is the disadvantage, is large, it is possible to improve the oxidation or discoloration at the surface of the heat treated substance in the cooling chamber which tends to occur.The transport chamber 33 of the cooling chamber 7 isA lower roller space 45 provided with a conveying roller means 19 is provided at the lower portion thereofA roller upper space 46 above the conveying roller means 19 is provided.Lower roller space 45A partition plate 60, which is raised from the bottom wall 38 of the transport chamber 33 and is lower than the height of the top portion 21 of the roller 20, is partitioned by a partition plate 60.A lower cooling water passage 34 is provided through a bottom wall 38 made of heat transfer material.Diagram