1.3 characteristics of electrochemical plating.
(1) Equipment characteristics: device's small footprint, light weight, easy to carry, allowing on-site or field operations.
(2) Bath Features: Bath majority of metal organic complex solution, there is considerable in the water solubility, and has good stability. Available in a wide current density and temperature range. It has non-flammable, non-explosive, non-toxic, corrosion is small, little environmental pollution, easy operation and security.
(3) process technology and flexible features, deposition speed, coating variety, combined with high intensity. 2 in the plastic mold of
Electrochemical plating in plastic mould an important application is in the mold surface coated with a layer of thin and uniform gold alloy to prevent the processing of PVC or PVDC is released from the release of hydrochloric acid corrosion, corrosion pits will be produced products surface of drag marks, crow's feet and other defects, and will shorten the life of the mold. At present, ordinary electrochemical plating on the plated side in mold 2.5 "m thick gold alloy. This layer of metal released from the PVC coating to prevent erosion, thus significantly increasing the die life. Electrochemical plating using gold alloys Another advantage is that , when the repair coating, will not need to die down and then one can take to repair it. normally used for polishing the surface of iron or steel wire brush with a soft brush into the mold surface is not smooth like to make the new coating with the mold surface fusion together.
When the molding PET, ABS, PE, PP plastic products, these materials are steel and chromium adhesion. Through the gold alloy plating, so that this material can enhance the plastic mould cavity surface with the separation of roles. As long as the thickness of their gold-plated alloy molding PVC of about half the thickness required, they meet the requirements of anti-adhesion.
Finished in the plastic mould in use and in order to rust and corrosion is usually the work of surface modeling, Tumo oil or grease. If you want to remove rust on the surface of mold, usually in the mold and corrosion pits on the surface leaving traces. This deficiency is for the plastic mould is often fatal. By electrochemical plating, while preserving the surface before the mold can be coated with a layer separated by the thickness of plating interlayer up to 50 m. After the plating compartment, if necessary, can be combined with oil or grease coating, for anti-corrosion, 1 2 m thickness of the coating compartment is sufficient. When you need to use the mold, you can be separated to remove, so that mold forming face to the initial state.
3 Conclusion
Electrochemical plating method in aerospace and marine areas of the application of plastic mould is only a few years ago, but by virtue of its simple operation, easy to use, cost-saving advantages of this technology approach in the plastic mould industry, the rapid application development . Electrochemical plating by virtue of their unique advantages in the plastic mould industry is bound to play an important role, which is mainly reflected in:
(1) has a good social plastic mould manufacturing technology for high, long production cycle, processing and high cost of mold material demand is strong, is extremely valuable. Now a lot of precision plastic moulds need to be imported from abroad, costs and expenses are high. If the premature failure abandoned, not only economically wasteful, but also a waste of resources. Electrochemical plating of plastic mould repair or reinforce its surface treatment not only meet industry's needs, you can also save money at the same time can play a role in environmental protection. (2) has an important economic benefits such as St. Louis, a manufacturer produces a kind of symbol TwA plastic cups, these airlines logo printed on the side of the cup. When the engraved mark where electrochemical plating of copper and nickel, and then coated with a layer of nickel-tungsten alloy, the surface of the mold is fixed. Has now produced hundreds of thousands of such devices without the application of more than 20 years of history, and in marked plastic cups. So that you can no longer spend a lot of money to open a set of unmarked plastic cup mold, the company saved a lot of money.