Die Casting Supplierintroduces the precautions when forming zinc alloy die castings:

Stopping the inspection of the blank before plating is an important step to ensure the quality of electroplating of zinc alloy die castings. Zinc alloy die castings have defects such as gates, flashes, horizontal lines, burrs, nodules, etc. on the outside when they are formed. In this regard, strict inspections should be stopped to prevent defective products from entering the electroplating process.

The rough parts that are difficult to be mechanically polished or leveled will cause quality problems in electroplating are eliminated, which can reduce the repair rate in electroplating and reduce the cost of consumption. The tools for mechanical polishing and polishing should be softer elastic wheels. Due to the soft texture of zinc alloy die castings, it is necessary to use a grinding wheel made of white cotton cloth (with emery grains stuck on the working surface) to stop polishing.

When the workpiece is pressed against the working surface of the grinding wheel, the abrasive grains can be inserted into the wheel, so that the cutting ability of the abrasive grains can be weakened, so that the geometric shape of the workpiece will not change, and the surface will be more lubricated after grinding. Polishing, to prevent the workpiece from revealing the bottom (the bottom is porous and loose structure), grinding to remove the dense layer, while avoiding soft metal sticking to the grinding wheel, reducing the lubricity of the surface being ground.

The working surface of the grinding wheel needs to be coated with red polishing paste, so that countless abrasive grains are covered by the polishing paste, and the grinding performance is weakened, so that the appearance is smoother and lubricated, and the pressure of the working surface against the grinding wheel is small and even. The quality of the dense layer on the surface of zinc alloy die castings directly affects the quality of electroplating, so it must be maintained during polishing.

Through the above introduction, Zinc Die CastingManufacturers hopes that you can simply refer to the content of this article in future use.