How do the combination screws do the pre-processing work？
Three points of attention for the pre-treatment process of the combined screw spray, what is the combination screw spray. Spraying is a coating method applied to the surface of an object by means of a spray gun or a dish atomizer, which is dispersed into a uniform and fine mist by means of pressure or centrifugal force.
Hardware spraying process selection. Metal spraying can be divided into air spraying, airless spraying, electrostatic spraying and various derivative methods of the above basic spraying forms, such as high flow low pressure atomizing spraying, thermal spraying, automatic spraying, multi-group spraying and the like. The method of spraying should be based on the use of different materials.
Conventional combination screw pre-treatment. Degreasing and degreasing→Washing→Pickling and derusting→Washing→Neutralization→Washing→Table adjustment→Phosphoration→Washing→Drying→Coating/ie electrostatic spraying (normally used for degreasing and degreasing, pickling and derusting processes) The process must be greater than 25 minutes).
1: When there is no rusted workpiece, the process is as follows. Pre-degreasing → degreasing → hot water washing → cold water washing → cold water washing → pre-setting → surface adjustment → phosphating → cold water washing → pure water washing (1) → pure water washing (2).
2: When there is a rusted workpiece, the processing flow is as follows. Pre-degreasing → degreasing → hot water washing → cold water washing → pickling → cold water washing → surface adjustment → phosphating → cold water washing → pure water washing (1) → pure water washing (2)