Manufacture of mould material generally no corrosion resistance, if they meet water, corrosive gas, is likely to rust, the rust die made of plastic parts, its quality will be greatly affected, therefore, should try to avoid mold rust.
  1.Melt Overheating gas lead to rust and prevent. When the melt at high temperature in the cylinder, a lot of raw materials will produce volatile gases due to overheating, this gas is very corrosive, will corrode the mold and machine. The die less corrosion by or from the volatile gas, the first step is to control the barrel temperature, make its not overheating; second is to stop the injection molding, must use clean soft cloth to wipe clean the mold; third, when the die long time when not in use, should be in the cavity of spraying anti rust agent, in the closed mold, also with butter, plug gate.
  2.The residue class carbide lead to rust and its prevention. In the mold after long time working, melt precipitated or decomposition of carbides in the die cavity adhesion, hardness and corrosion resistance they have large, often make the mold corrosion or wear, to avoid corrosion and rust, once found a carbide, shall immediately with a dry cloth to wipe, if it is difficult to erase, can dipped a little alcohol after wetting, can erase.
  3.cooling water indirectly lead to rust and its prevention. Is to pass the cooling water in the mold, if the cooling water will die cooling to the dew point, moisture in the air will be in the mold surface condenses into water droplets, these droplets is very easy to make die rust, although in the forming process of the melt temperature high not to dew point below, but the type once stop, very easy the formation of cooling water, therefore, in the production process, the best do not stop forming operations, to stop, should also be timely turn off the cooling water, if it is found that the water mold, should be promptly wiped away.
  4.plating defects lead to rust and its prevention. Plating layer in the cavity is so dense, antirust ability is very strong, but if in electroplating process conditions is not well controlled, the plating layer, loose organization is not very close, at this time, the volatile corrosion gas will in the cavity through these weak points into the plating layer at the bottom, causing corrosion, therefore, the need for coating re treatment, or coated with heat resistant adhesive filling loose, or re plating.