In modern industrial production, die castings, as an important component, are widely used in many fields such as automobiles, machinery, and electronics.Its quality is directly related to the performance and reliability of the entire product.As an important part of quality control of die castings, air tightness testing plays a vital role in ensuring the sealing and stability of die castings.Today, we will take an in-depth look at the air tightness testing process of die castings.

1. The importance of die casting sealing

Die castings often need to withstand certain pressure and temperature changes during use.If the sealing of the die casting is not good, it may cause gas or liquid leakage, thus affecting the performance and service life of the product.For example, in automobile engines, poor sealing of die-casting parts may cause oil leakage and affect the normal operation of the engine; in electronic products, poor sealing of die-casting parts may cause dust and moisture to enter and damage electronic components.Therefore, strict air tightness testing of die castings is a key step to ensure product quality.

2. Testing methods and requirements

The air-tightness testing of die castings this time uses direct pressure testing method, combined with customized molds and testing platforms.

Specific testing requirements are as follows:

The test pressure is set to 250kPa.In the inflation stage, which lasts for 5 seconds, a certain pressure of gas is injected into the die casting to make it reach a predetermined pressure state.

This is followed by a pressure stabilization time of 15 seconds. The purpose of this stage is to stabilize the pressure inside the die casting so that subsequent inspections can be more accurate.

The test time is 5 seconds. During this short time, the detector will quickly detect the leakage of the die casting.

Finally, there is a release time of 3 seconds. After the inspection is completed, the gas inside the die casting is released.

The total duration of the entire test process is 28 seconds.

During the testing process, if the leakage value does not exceed 50Pa, the product to be tested is qualified.This strict standard ensures that every die casting that passes inspection has good sealing properties.

3. Advantages of the instruments used

This test used the HC high-precision differential pressure air tightness detector and supporting test platform.HC high-precision differential pressure air tightness detector has extremely high detection accuracy and stability, and can accurately measure the leakage of die castings.The supporting test platform provides stable support and operating environment for the testing process to ensure the smooth progress of the testing.

4. Strict quality control measures

In order to ensure the accuracy and reliability of test results, strict quality control measures need to be taken during the testing process.First of all, the detector needs to be calibrated and maintained regularly to ensure its detection accuracy and stability.Secondly, testing personnel need to receive professional training and be familiar with the operation of testing equipment and testing standards to ensure the accuracy of testing results.In addition, the inspection process also needs to be strictly monitored and recorded so that problems can be discovered and solved in a timely manner.

Summarize

Air tightness testing of die castings is an important step in ensuring product quality.By using the direct pressure test method, combined with customized molds and test platforms, and using HC high-precision differential pressure air tightness detectors and supporting test platforms, the leakage of die castings can be effectively detected, ensuring that every die casting that passes the test has good sealing properties.In future industrial production, with the continuous improvement of product quality requirements, air tightness detection technology will continue to be innovated and improved, providing more powerful support for the development of the die casting industry.