In the production of household electric die castings, quality control is a crucial link in ensuring product reliability and service life. Die casting production involves molten metal injection, high-temperature and high-pressure cooling, and subsequent machining. Deviations in any step can lead to defects such as porosity, shrinkage cavities, cracks, or deformation. Therefore, establishing a rigorous quality control system is essential.
First, raw material quality control is fundamental. Aluminum, zinc, and magnesium alloys used for die casting must meet standard composition requirements to avoid impurities or uneven composition affecting fluidity and mechanical properties. Melting temperature and holding time also need strict control to ensure uniform molten metal and prevent inclusions or gases from entering the mold.
During production, process control is particularly critical. High-pressure injection speed, injection pressure, mold temperature, and cooling time are all factors that directly affect part quality. Modern die casting production generally employs automated and intelligent control systems, achieving process stability and part consistency through real-time monitoring and parameter adjustment. Mold maintenance and calibration are equally important; worn or deformed molds can lead to dimensional deviations and surface defects.
Inspection methods are the core of quality control. Common inspection methods include visual inspection, dimensional measurement, and non-destructive testing. Visual inspection can detect surface defects such as porosity, cracks, and burrs; dimensional measurement ensures that parts meet design requirements; and non-destructive testing (such as X-ray and ultrasonic testing) can detect internal defects. For critical parts, mechanical property tests, such as tensile, hardness, and impact tests, are also required to verify material and structural properties.
