Die-casting is a metal casting process characterized by the use of a mold cavity to apply high pressure to molten metal. Molds are usually machined from stronger alloys, a process somewhat similar to injection molding. Depending on the type of die casting, a cold chamber die casting machine or a hot chamber die casting machine is required. Advantages of die casting include excellent dimensional accuracy of the casting. Usually this depends on the casting material, typical values ​​are 0.1mm error at the initial 2.5cm dimension and 0.002mm error for each additional 1cm. Compared with other casting processes, its casting surface is smooth and the fillet radius is about 1-2.5 microns. Castings with a wall thickness of about 0.75 mm can be produced relative to sandbox or permanent mold casting. It enables direct casting of internal structures such as wire jackets, heating elements, high-strength bearing surfaces.

Spray painting is the spraying of paint. Spraying is a coating method that is dispersed into uniform and fine droplets by means of pressure or centrifugal force through a spray gun or disc atomizer, and is applied to the surface of the object to be coated. It can be divided into air spraying, airless spraying, electrostatic spraying and various derivatives of the above-mentioned basic spraying forms, such as high-flow and low-pressure atomizing spraying, thermal spraying, automatic spraying, multi-group spraying, etc. Fully automatic painting, the products that need to be sprayed are fixed on the rotatable bracket, and then the bracket is locked on the assembly line. Through the movement of the assembly line and the continuous rotation of the rotatable bracket, 100% uniform spraying on the surface of the product has been achieved.

The burn-in test is divided into temperature aging, sunlight aging, loading aging and so on. High temperature aging is generally carried out in several grades. The industry generally uses a grade of 70 degrees, 4 hours, and 15 degrees. Generally, there are several grades of 40 degrees, 55 degrees, 70 degrees, and 85 degrees. The time is generally 4 hours. According to the number of aging test products, it is divided into 2 methods to test 1. Aging box; mainly for plastic products, and products with small quantity and volume are more practical. 2. Aging cabinet or aging room; Electronic products, power supplies, motherboards, monitors, exchangeable chargers, etc.) simulate a high temperature and harsh environment testing equipment, which is an important experimental equipment to improve product stability and reliability, and is an important test equipment for manufacturers to improve their products. Important production processes for quality and competitiveness

Salt spray test is an environmental test that mainly uses artificial simulated salt spray environmental conditions created by salt spray test equipment to evaluate the corrosion resistance of products or metal materials. It is divided into two categories, one is natural environmental exposure test, and the other is artificial accelerated simulated salt spray environmental test. The artificial simulated salt spray environment test is to use a kind of test equipment with a certain volume space - the salt spray test box, in its volume space, use artificial methods to create a salt spray environment to assess the product's salt spray corrosion resistance performance and quality . Compared with the natural environment, the salt concentration of chloride in the salt spray environment can be several times or tens of times that of the general natural environment salt spray, which greatly increases the corrosion rate. The test is carried out on the product to obtain the result. time is also greatly shortened.