The back shell of the electric toothbrush serves as the charging part of the electric toothbrush, and the charging components are connected inside.People have high safety requirements for it. If its safety level is not high, external water mist will enter the interior of the casing through the gaps and damage the internal charging system, causing the casing to fail to function normally.Therefore, it is very important to detect the air tightness of the back shell of the electric toothbrush.

Hirays Technology has also done a lot of research on the air tightness testing of the back shell of electric toothbrushes. While solving many testing problems, Hirays's air tightness detector has also been put into use in the production line.This time we will share a case of air tightness testing of the back shell of an electric toothbrush for your reference.

Air tightness tester for electric toothbrush back shell

1. Air tightness testing requirements for the back shell of electric toothbrushes

1. The back shell of the electric toothbrush that needs to be tested this time has a high overall precision and is cast with pink waterproof shell material. There are two connection holes on the top and front end of the back shell of the electric toothbrush;

Electric toothbrush back shell

2. There are two points to overcome when testing the air tightness of the back shell of an electric toothbrush: the non-destructiveness of the test to the product and the accuracy of the results.Since the overall shape of the back shell of this electric toothbrush is relatively special, it is difficult to fix it during inspection. A special mold needs to be used to fix it, and an indirect inspection method is adopted.

2. Demonstration of the air tightness testing process of the electric toothbrush back shell

1. This time we need to test a large number of them at the same time, so we need to use a multi-channel air tightness detector to test their air tightness. This instrument has the advantage of being able to detect three channels at the same time, and the testing equipment adopts a skateboard design, which makes less noise when used, is safer, and is more efficient;

Detailed display of the air tightness test of the back shell of the electric toothbrush

2. Due to the special structure of the back shell of the electric toothbrush, Hirays Technology has developed a mold that can be used to place the back shell of the electric toothbrush. Before starting the test, put the back shell into the mold and set the mode. The upper mold will be closed with the mold below where the back shell of the electric toothbrush is placed, forming a sealed space. The instrument will directly inflate the mold. When the internal gas reaches a saturated state, the air pressure inside the mold can be used to determine whether the air tightness of the back shell of the electric toothbrush is qualified.

Air tightness testing process of electric toothbrush back shell

3. During the test, the inflation port at the rear of the mold is connected to the conduit to inflate the inside of the mold. If the back shell of the electric toothbrush is not sealed and air leakage occurs, the leakage value displayed in the instrument will become larger and larger, and the pressure value will decrease at the same time.At this time, it can be determined whether the car controller is leaking, and the instrument test result will also show NG, which means the air tightness test failed.If the back shell of the tested electric toothbrush does not leak, the gas in the tooling mold will be in a constant state after inflation. The pressure value and leakage value displayed on the instrument are also stable. The instrument test result will display OK, indicating that the air tightness test has passed.

3. Advantages of using multi-channel air tightness detector

Air tightness tester for electric toothbrush back shell

(1) Save time and cost; this detector can provide three detection channels during detection, and can detect three camera lenses at the same time. The test speed is three times faster than usual, which is more conducive to saving time and cost.

(2) The equipment cost is lower; the three-channel sealing tester controls the sealing test of three stations by three testing equipment, and only needs one person to operate, streamlining the manpower for the enterprise and optimizing the manufacturer's capital chain.

(3) Strong operability and high efficiency; the tester is also equipped with"positive, negative&"Two pressure forms and 8 basic test modes, which can be selected individually or combined.It uses 24-bit A/D conversion, 32-bit CPU operation, and a completely independently developed industrial control operating system, combined with a full-touch human-computer interaction interface.Built-in RS232 serial port, RJ45 network port, USB communication interface, LTP external I/O control port, supports multiple communication protocols, diversified self-service operations, and combines artificial intelligence with intelligence to enhance the operability of the device.

Four, Air tightness detector parameters of electric toothbrush back shell

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