| 摘要 |
PURPOSE:To form a thermally sprayed Zn film having always a uniform thickness even if the extrusion speed of an extruded material of Al, etc., changes by automatically adjusting the angle of a thermally spraying gun with the extruded material according to the extrusion speed of the extruded material at the time of forming the film on the surface of the extruded material by thermally spraying the Zn, etc. CONSTITUTION:The extrusion molding material 2 consisting of a metal, such as Al, is extruded from the extruder 1 and molten Zn, etc., are thermally sprayed onto the surface of the extruded material 2 by the thermally spraying gun 5 in order to improve corrosion resistance. The extruded material 2 is passed through the inside of a hardening chamber 3 and is then coiled by a coiler 4. The extrusion speed of the extruded material 2 is detected by an extrusion speed detector 10 provided near the outlet of the extruder 1 in this case. The angle theta of the thermally spraying gun 5 with the extruded material 2 is automatically adjusted by operating a thermally spraying gun mounting angle changing device 6 mounted to the thermally spraying gun 5 in accordance with the detected speed, by which the thermally sprayed Zn film of always the uniform thickness is formed on the surface of the extruded material 2 at the specified rate of thermally spraying of the Zn from the thermally spraying gun 5 even if the extrusion speed of the extruded material 2 changes. |
