The manufacture of large coils of galvanized wire is generally completed by pouring. There are many types of pouring, according to different processing requirements, the choice of pouring method is different.
1, sand mold casting: low cost, small batch, can process complex modeling, but may require a lot of post-processing process. Investment casting/lost wax casting: This process has high continuity and accuracy and can also be used for complex molding. It is under the premise of relatively low processing cost, can achieve a very perfect surface effect, suitable for mass production.
2, injection casting method: used for processing high error of complex modeling. Due to the characteristics of the process itself, no post-treatment is required after the product is formed, but only in the case of mass production can it show the advantages of low cost. Die casting: high processing cost, only in the case of mass production of the cost is reasonable. But the final product cost is relatively low and the error is relatively high, can be used to produce parts with thinner wall thickness.
3, rotary casting method: is the ideal method for processing small parts, usually used in jewelry manufacturing. Rubber models can be used to reduce the cost of processing. Directional curing: Produces a very strong superheat alloy with excellent fatigue resistance poured into the model and then subjected to a carefully controlled heating and cooling process to eliminate any minor defects. The casting method is used to process galvanized iron wire, which is generally used for processing complicated parts.
In order to locally remove the surface film layer and surface inclusions from the surface of the deposited layer, large coils of galvanized wire can be found and treated by conventional technology. Excess lather is caused by soap and saponizable fatty surfactants introduced into the tank. A moderate rate of foam formation may be harmless. The presence of small homogeneous particles with large denier in the tank liquid can stabilize the foam layer, but the accumulation of too many solid particles may cause an explosion.
Activated carbon mat to remove the surface active material, or filtration to make the foam less stable, are effective measures. Other measures should also be taken to reduce the amount of surfactant introduced. The electroplating speed can be reduced obviously with the addition of organic matter. Although the chemical formula is conducive to high deposition rate, but the organic matter with people, so that the coating thickness can not meet the requirements, so activated carbon can be used to treat the tank solution.
Post time: 11-08-21