The die casting process of sensor housing is mainly used to manufacture the outer shell that protects the electronic components inside the sensor from external environmental influences (such as moisture, dust, mechanical damage, etc.). The sensor housing usually needs to have a certain strength, corrosion resistance, good electromagnetic shielding performance and excellent heat dissipation performance. Die casting is a process that is very suitable for mass production of high-precision and complex-shaped metal housings, and is widely used in the manufacture of housings for various sensors.
Since sensor housings usually require high-precision and complex-shaped structures, mold design is a very critical step. The mold needs to be designed to be able to smoothly fill the metal liquid under high pressure and ensure the accuracy of the finished product. Select a suitable metal material (such as aluminum alloy, zinc alloy, magnesium alloy, etc.), heat it above the melting point, and make it liquid. The molten metal liquid is injected into the mold cavity by high pressure. Because the pressure is very high, this ensures that the metal liquid completely fills every detail of the mold and ensures precise shape and size. After the metal cools, the mold opens and the casting is removed from the mold. Generally, die castings need to be deburred, surface treated (such as spraying, oxidation, electroplating, etc.) and precision processed (such as drilling, cutting, etc.) to meet the final requirements. Quality inspections are carried out on surface defects, dimensional accuracy, electromagnetic shielding, etc. to ensure that the housing meets the design requirements.
The precise control of the die-casting process enables the sensor housing to withstand higher mechanical shocks and more demanding working environments. For example, the housings of oxygen sensors and temperature sensors in the automotive industry need to have strong shock resistance and high temperature resistance. Traditional casting methods cannot meet these high requirements, and the application of die-casting technology undoubtedly fills this technical gap.
As the "sensing organ" of smart devices, the quality of the sensor housing directly affects the stability and safety of the entire system. With the continuous growth of market demand and the advancement of technology, the application of die-casting technology in the manufacturing of sensor housings will be more extensive, and will continue to develop in the direction of high precision, lightweight and environmental protection.