The wiredrawing mold in the long-term use process, the mold wall receives the metal wire rod intense friction and the washing out effect, inevitable will have the attrition phenomenon, what will be most common will be presents the ring-like ditch water transport in the work area wire rod entrance (dent). Pulls the filament line mold cingulum the appearance, intensified the nib attrition, because on the cingulum because of becomes less crowded causes impurities and so on some iron slag to lead by Jin Shuxian the nib work area and decides the diameter area, is playing the grinding compound role, but enters the nib the wire rod likely to rub the needle same aggravating nib the attrition. If is not prompt exchanges carries on the repair, then the cingulum will continue to accelerate to expand, will cause the repair to increase the difficulty and the wire rod presents the scratch, will have the possibility to compare the deep place in the ring-like trench to present the crack, will cause the mold complete disintegration abandonment.
Knew from the experience that formulates set of standard standards, strengthens the current maintenance, carries on the overhaul to the mold is the very economical worthwhile matter frequently. Once the mold presented any slight attrition, carries on polishing promptly, then makes the mold to restore spends the time to the primitive polishing condition to be short, not only mold's pass size changes not obviously. Will also lengthen mold's service life.