Conical Twin Screw and Barrel
Cold Feed Rubber Machine Screw and Barrel manufacturers will show you how to repair and strengthen the rubber extruder screw
Today, the manufacturer of Cold Feed Rubber Machine Screw and Barrel will focus on how to repair and strengthen the rubber extruder screw.
1. Do a good job of surface cleaning
Before the screw spray welding, the residual attachment on the surface of the screw should be cleaned. The specific cleaning method is to install the screw on the spraying machine and rotate it, let the spray gun slightly bake in a neutral flame, Cold Feed Rubber Machine The Screw and Barrel manufacturer tells you to wait until the attachment is plasticized and remove it with a spatula, and then remove the oxide layer on the surface.
Spraying machine tools can be used during preheating. If there is no spraying machine tool, vibration surfacing machine tools can also be used instead. Note that the speed of the machine tool should not jump too high. The preheating temperature should be controlled at about 270°C, which can be effective Guarantee the quality of spray welding layer.
3. Use spray welding
One-step spray welding process can be used to repair and strengthen the screw. It mainly repairs the worn part of the screw. Usually, the screw wear of the rubber extruder is about 2-3mm. The manufacturer of Cold Feed Rubber Machine Screw and Barrel tells you to spray enough size in one operation when repairing, and take into account the machining allowance. If there are deficiencies found during one spraying, repair welding can be carried out. In order to avoid cracks in the weld layer during repair welding, the preheating temperature and the uniformity of preheating must be mastered.
4. Trimming and straightening
Since the screw has technical requirements on linearity, thread surface and screw axis runout, it is necessary to trim and straighten the screw after welding.
The manufacturer of Cold Feed Rubber Machine Screw and Barrel tells you that the specific repair method is to produce a mandrel with a center hole and press it into the bearing hole of the screw head of the rubber extruder, which can not only avoid rubber extrusion during spray welding The extruder screw is bent and deformed, and the worn screw can be repaired to enhance the performance of the screw.