Aluminum alloy die-cast parts are widely used in the new energy vehicle industry, and air tightness is one of the key indicators for assessing their quality.

During the die-casting process, the controller housing may develop invisible defects such as cracks, porosity, and air bubbles due to various reasons, leading to leaks or water seepage. These issues significantly reduce the product's lifespan and pose serious safety risks. To ensure product quality, airtightness testing is absolutely essential. As a professional supplier specializing in the production of new-energy vehicle controller housings, Hengyongxin continuously upgrades and refines its airtightness testing methods based on actual production conditions, playing an increasingly critical role in safeguarding product quality.

Air-tightness testing method:

(1) Conduct an air-tightness test after assembling the box body and its accompanying parts;

(2) Conduct a leak test using a simple tooling fixture. Since one side of the box cover plate is open, the test is performed by sealing that side with the fixture and directly inflating it. Meanwhile, the four sides of the box body have openings, which can be sealed using a cylinder-assisted cover plate paired with a sealing head designed to match the shape of the holes. Finally, connect the sealed box to the test port of the air-tightness testing equipment, set the appropriate test parameters, and begin the inspection.

Method for determining the airtightness of the enclosure:

(1) For the determination of airtightness instrument test data, the sensor in the airtightness tester can automatically provide an OK or NG result based on the set parameters.

(2) The box can be sealed, inflated, and directly placed into the water tank. If no bubbles appear, it’s OK; if bubbles do emerge, it’s NG.