CN204855120U - A detection mechanism for detecting whether sealed package body leaks gas - Google Patents

Abstract

A detection mechanism for detecting air leakage of a sealed package that is low in cost, simple in structure, and capable of quickly detecting whether the airtightness of a packaged product is good. It includes a vacuum pumping assembly, in which there is also a sealed leak-testing chamber consisting of an upper mold and a lower mold for placing the product to be tested. The leak-testing chamber is connected to the pumping chamber through a leak-detecting tube. The air pumping cavity is connected to the vacuum pumping assembly, and a vacuum degree detector is connected to the leak detection pipe. Compared with the prior art, the utility model adopts a relatively simple upper mold and a lower mold. The detection mechanism composed of the leak detection chamber, the air extraction chamber, the vacuum assembly and the vacuum degree detector can accurately detect whether the airtightness of the electronic component package is good or not while ensuring that the electronic components are not damaged. . Moreover, the institution has low investment cost, easy operation and fast detection speed.

Description

The detection mechanism used to detect whether the sealed package is leaking

technical field

The utility model relates to an air leakage detection device, in particular to a detection machine for detecting air leakage of packaged products.

Background technique

Electronic components need to be packaged in a sealed or vacuumed way for moisture-proof and anti-corrosion purposes when they leave the factory, and the quality of the packaging will affect the storage period of the electronic components. If the storage environment is not good, it will also affect its use. life.

In actual operation, whenever electronic components are packaged, it is necessary to verify whether the airtightness of the entire package is good, or whether the vacuum sealing performance is good.

Usually, the following method is used to verify: soak the whole packaged product in hot water, and observe manually to see if there are bubbles. When there are bubbles, it means that the packaging is not tight and there is a leak point, that is, water in the hot water seeps into the packaging. Push the air out of the body.

The disadvantage of this method is that if the airtightness of the packaging body of the product to be tested is not good, the water entering the packaging body from the leakage point will directly damage the product therein.

Contents of the invention

The technical problem to be solved by the utility model is to provide a low-cost, simple-structure detection mechanism for detecting whether the airtightness of the packaged product is good or not.

In order to solve the above technical problems, the technical solution adopted by the utility model is:

The detection mechanism for detecting air leakage of the sealed package of the utility model includes a vacuum pumping assembly, in which there is also an airtight leakage detection chamber consisting of an upper mold and a lower mold for placing the product to be tested. The leak chamber is connected to the pumping cavity through a leak detection tube, and the pumping cavity is connected to the vacuum assembly, and a vacuum degree detector is also connected to the leak detection tube.

The volume ratio between the leak detection chamber and the air pumping chamber is 1:3-1:5.

The vacuum component is a vacuum cylinder or a mechanical vacuum pump.

The vacuum degree detector is a vacuum sensor.

Compared with the prior art, the utility model adopts a relatively simple detection mechanism composed of an upper mold and a lower mold, a leak detection cavity, an air extraction cavity, a vacuum assembly and a vacuum degree detector, which can ensure that the electronic components are Under the condition of not being damaged, it is accurately detected whether the airtightness of the packaging body of the electronic component is good. Moreover, the institution has low investment cost, easy operation and fast detection speed.

Description of drawings

Fig. 1 is a schematic diagram of the mechanism of the utility model.

Fig. 2 is a schematic diagram of comparison before and after implementation of the mechanism of the utility model.

The reference signs are as follows:

Upper mold 1, lower mold 2, leak detection cavity 3, air extraction cavity 4, vacuum assembly 5, leak detection tube 6, vacuum degree detector 7, product to be tested 8, clamping cylinder 9, leak detection cavity Volume V1, volume V2 in the packaging body of the product 8 to be tested, and volume V3 in the pumping cavity.

Detailed ways

As shown in Figures 1 and 2, the detection mechanism used to detect whether the sealed package is leaking in the utility model is a simple leak detection mechanism, which is mainly suitable for the sealing body of the electronic component package (that is, the electronic component has been sealed). The whole package after the parts are packaged) is tested for air tightness.

It is mainly composed of a leak detection cavity 3 for placing electronic component packages (also known as the product to be tested 8 ), an air extraction cavity 4 that can change the air volume of the air chamber, and a vacuum assembly 5 .

The leak detection cavity 3 is composed of the upper mold 1 and the lower mold 2 after mold closing. The upper mold 1 is connected with a mold clamping cylinder 9 that can move the upper mold 1 up and down. The inner cavity of the upper mold 1 and the lower mold 2 is closed. It is the leak detection chamber 3 described above, and a sealing structure is provided at the junction of the upper mold 1 and the lower mold 2 , and the electronic component package can be placed in the leak detection chamber 3 .

The air pumping cavity 4 is a sealed cavity, which is connected to the vacuum pumping assembly 5 and the leak detection tube 6 respectively. The vacuum pumping assembly 5 of the present utility model is preferably a vacuum pumping cylinder or a mechanical vacuum pump. When the vacuum assembly 5 is working, the air density in the pumping cavity 4 decreases. The volume ratio of the leak detection chamber 3 to the air extraction chamber 4 is 1:3-1:5.

A leak detection tube 6 is also connected between the leak detection chamber 3 and the air extraction cavity 4 , and the leak detection tube 6 communicates with the leak detection cavity 3 and the air extraction cavity 4 respectively.

On the said leak detection pipe 6, there is also a vacuum degree detector 7 which can detect the air density in the airtight space formed by the leak detection chamber 3, the leak detection pipe 6 channels and the air extraction chamber 4 (preferred in the present invention). The vacuum assembly 5 is a vacuum cylinder or a mechanical vacuum pump, and the vacuum degree detector 7 is a vacuum sensor).

The structures of the leak detection chamber 3 and the air extraction chamber 4 are both rigid structures.

Working principle of the utility model:

1) Put the product 8 to be tested into the leakage detection cavity 3, start the mold clamping cylinder 9 to clamp the upper mold 1 and the lower mold 2, and form a closed leakage detection cavity 3.

2) Start the vacuum assembly 5 to reduce the air density in the air extraction cavity 4, that is, form a negative pressure in the air extraction cavity 4 with a pressure lower than atmospheric pressure.

In the present invention, the volume V3 in the air pumping cavity 4 is preferably 3-5 times of the volume V1 in the leak detection cavity 3 .

3) Judgment:

If the reading value of the vacuum sensor connected to the leak detection tube is constant within a specified time and is a normal value calculated according to the volume of the pumping chamber 4, the actual volume in the leak detection chamber 3 and the set value of the vacuum assembly 5, Then it shows that the air in the product 8 to be tested does not leak, which proves that its airtightness is good;

If the reading value of the vacuum sensor cannot be stabilized within a specified time and the reading value is higher than the normal value, it indicates that the airtightness of the product 8 to be tested has a problem.

Claims (4)

1. one kind for detecting the testing agency whether sealed packaging leaks gas, comprise and vacuumize assembly (5), it is characterized in that: be also provided with the placement product to be measured (8) that is made up of mold (1) and bed die (2) wherein and be the chamber of leaking hunting (3) of closed, this chamber of leaking hunting (3) is connected with cavity of bleeding (4) by a leak detection tube (6), described cavity of bleeding (4) is connected with the described assembly (5) that vacuumizes, and described leak detection tube (6) is also connected to vacuum inspective meter (7).

2. according to claim 1 for detecting the testing agency whether sealed packaging leaks gas, it is characterized in that: described in the volumetric ratio of leaking hunting in chamber (3) and described cavity of bleeding (4) be 1:3-1:5.

3. according to claim 1 and 2 for detecting the testing agency whether sealed packaging leaks gas, it is characterized in that: described in vacuumize assembly (5) for vacuumizing cylinder or mechanical vacuum pump.

4. according to claim 3 for detecting the testing agency whether sealed packaging leaks gas, it is characterized in that: described vacuum inspective meter (7) is a vacuum transducer.