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KMD90双螺杆挤出机是德国较先进的塑料挤出机,价值18.5万美元,其螺杆、螺筒是该机关键部件。由于停产后没有及时清理,致使再生产时发现螺杆、螺价锈蚀,杆、街中心里锈蚀较严重,有0.30～0 55mm深浅不一的锈蚀片,螺棱部位有2/3表面锈蚀,原镀铬面剥落,简内亦不同程度锈蚀。经清洗、打磨后测得杆和街间隙单面超过0.35mm的占1/2,局部到0.60mm。 当外方代表看到这台挤出机的锈蚀情况后摇头失望,认为在中国不可能有修复的技术手段。经中方技术人员与徐州电刷惯协作组多次实地研究、论证,一致认为用电刷镀技术可以修复。
KMD90 twin-screw extruder is Germany’s more advanced plastic extruder, valued at 185,000 US dollars, the screw, screw cylinder is the key components of the aircraft. Due to the lack of timely clean-up after the termination of production, the screws and screw threads were found to be rusty during reproduction. The corrosion of the rods and street centers was more serious with 0.30-0.55 mm shades of rust, and 2/3 of the screw edges had surface rust. Peeling, Jane also varying degrees of corrosion. After cleaning, polished rod and street clearance measured more than 0.35mm single side accounted for 1/2, local to 0.60mm. When foreign representatives saw the rust of the extruder, they shook his head and felt disappointed that there could be no technical means of repair in China. The Chinese technical staff and Xuzhou brush used to collaborating group on many field research, demonstration, agreed that the brush plating technology can be repaired.