The positive pressure sealer is designed and manufactured according to the relevant provisions of GB/T 17876, etc. The positive pressure sealer inflates the inside of the sample to make the internal and external pressure difference of the sample immersed in water, and observes the gas escape in the sample. The sealing performance of the sample. The positive pressure sealer is suitable for the sealing test of plastic anti-theft caps in food, pharmaceutical and other industries. Through the test, the sealing process and sealing performance of the flexible package can be effectively compared and evaluated, and a scientific basis for determining the relevant technical requirements is provided.
The MFY-4 positive pressure sealer is a sealing performance and processing technology for detecting and inspecting plastic anti-theft caps using compressed air. The instrument provides an advanced, practical and effective test method for the quality and reliability of the plastic anti-theft cap. The operation is simple, the design of the instrument is unique and novel, and it is easy to observe the test results, especially the leakage of tiny pores of the seal. Perform fast and efficient testing.
Positive pressure sealer structure characteristics and working principle
1 , structural characteristics
It mainly consists of special transparent container chamber (plexiglass barrel), pressure control system, compressed air source (customer self-supplied gas source outlet pressure is 0.7~1MPa), pressure display device and so on.
2 , working principle
By inflating the inside of the sample, the sample immersed in water is subjected to internal and external pressure difference, and the gas escape in the sample is observed to determine the sealing performance of the sample.
Positive pressure sealer technical indicators
1, measuring range: 0 ~ 1Mpa
2, test indoor product: 280 * 280 * 380mm
3. Average air consumption: 70L/min
4. Net weight of equipment: 10kg
5, own a stable and clean compressed air source
6, compressed air pressure range: 0.7 ~ 1 Mpa
Positive pressure sealer installation and commissioning
1. Place the organic test chamber on the chassis or on the side of the chassis.
2. Connect the pressure-stable compressed gas source to the inlet pipe of the tester “compressed air†and connect the pressure output to the quick connector of the clamp.
3. Inject a certain amount of clean water into the test chamber, and the height is not over the sample.
4. Cover the upper cover of the test chamber, set the pressure maintaining switch on the tester to the open position (the pressure relief switch is in the off position), and adjust the control adjustment knob of the tester to first determine whether the knob is locked (ie, press Under the state), if locked, you need to use a little force to pull up the knob, then rotate to adjust, and observe the pressure gauge to adjust the pressure to the value you need. Turn the pressure holding switch on the tester to the off position, close the air circuit to start the pressure keeping, and time. After adjusting to the desired steady pressure, press the knob to secure the position.
5. After the end, turn the pressure relief switch on the tester to the open position to eliminate the pressure inside the sample. Open the test chamber upper cover and take out the sample. After replacing the next set of samples, turn the pressure relief switch to the off position, then open the pressure holding switch to inflate the sample and start the next set of tests.
Positive pressure sealer operation
1. Inject clean water into the test chamber. The height is not over the sample. The sample is connected to the fixture and placed in the water.
2. Cover the upper cover of the test chamber, turn the pressure-holding switch on the tester to the open position (the pressure-relief switch is in the closed position), adjust the control adjustment knob of the tester (see the adjustment method), observe the pressure gauge, Adjust the pressure to the stable value required for the test, turn the pressure switch of the tester to the off position to close the gas path, start to maintain pressure, and time.
3. The pressure rise process and the leakage of the sample during the pressure hold after the preset pressure value is reached, depending on whether or not continuous bubbles are generated. A single isolated bubble is generally not considered a sample leak.
4. After the test is finished, turn the pressure relief switch on the instrument to the open position, eliminate the pressure, open the upper cover of the test chamber, take out the test sample, wipe the surface water, and observe the surface damage result.
Label: Positive pressure sealer
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