| 摘要 |
PURPOSE:To obtain a film of a uniform thickness by hot dipping independently of the temp. of environment when a material to be hot dipped is pretreated and dipped in molten metal, by storing and pretreating the material at the same constant temp. CONSTITUTION:A drum 1 having a wound material 2 to be hot dipped is stored in a thermostat 9, and the material 2 is drawn out in the direction of an arrow 3 and pretreated with a pretreating liq. 4a in a pretreating vessel 4 kept at the same temp. as the thermostat 9. The material 2 is then dipped in molten metal 5a at constant temp. in a hot dipping vessel 5 to carry out hot dipping, and after removing molten metal stuck in excess with a squeezing tool 6, the material 2 is cooled with a cooler 7 and wound around a winder 8. Thus, a film of a uniform thickness is always obtd. by hot dipping under simple control. |
