The thermal insulation process of the thermos cup uses the principle of heat conduction placed in a multi-layer vacuum. Especially the cap of the thermos cup. Its air tightness is directly related to its insulation performance.Therefore, manufacturers will test the air tightness of the thermos cup lid during production. Hirays Technology has always done a lot of research in the field of air tightness testing. This time we will share the air tightness testing case of the thermos cup lid, hoping to give everyone a reference.
Air tightness tester for thermos cup lids
1. Display of the appearance of the thermos cup lid and the difficulties in detection
1. The lid of the thermos cup is round in shape, with components for switching on and off at the top. The entire lid is made of special materials with strong air tightness;
Thermos cup lid
2. The shape of the thermos cup lid is relatively precise, and it is impossible to use direct detection methods to fill the interior with gas. This shape is detrimental to the accuracy of the detection results.
2. A breakthrough in the difficulty of air tightness detection of thermos cups
1. The overall structure of the thermos cup is quite special. Hirays Technology specially customized a mold for it to hold the lid of the thermos cup. The entire mold has four grooves. When testing, just put the lid of the thermos cup into the grooves respectively, and the entire shape will fit perfectly;
Details of the air tightness testing mold for the thermos cup
3. Put the thermos cup cover into the tooling mold and connect it to our instrument. There is a valve island, gas tank and other components inside the instrument as well as the program we have set. After the connection is made, press the start button when testing the wire.When testing, the upper and lower molds will be closed, and there is a conduit connecting the instrument below the groove. When the test starts, the upper and lower molds will be closed, and the instrument will fill the interior of the thermos cup lid with impurity-free gas through the bottom of the groove. In this way, the air tightness of the intercom can be judged by the saturation of the air inside the mold;
Detailed display of air tightness testing of thermos cups
4. If the lid of the thermos cup 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, you can determine whether the thermos cup lid is leaking, and the instrument test result will also show NG, which means the air tightness test failed.If the tested thermos cup cover does not leak, the gas in the tooling mold will be in a constant state after inflation, and the pressure value and leakage value displayed on the instrument will also be stable. The instrument test result will display OK, indicating that the air tightness test has passed.
5. The customer requested to test 4 thermos cup lids continuously during this inspection, and the thermos cup lids were tested one by one in order. After the instrument program tests one thermos cup lid, it will automatically jump to automatically test the second thermos cup lid until the four products are tested in sequence.After the test is completed, the instrument will automatically display the test results.
3. Air tightness detector parameters of thermos cup lid
1. High-sensitivity pressure sensing and adjustment unit, combined with advanced differential pressure software algorithm, the minimum resolution can reach 0.1Pa. This algorithm has obtained a national patent.
2. The patented technology independently developed by Hiraysi, "IVT pneumatic sealing valve island", greatly improves the test accuracy, ensures the stability of the instrument, and greatly improves the inflation speed.
3. Multiple test functions: The instrument integrates two pressure forms, positive and negative, and 8 test methods: two pressure forms and five test methods can be programmed into more than 20 test functions.
4. It has more than 200 groups of subroutines. Each group of subroutines can be programmed independently, single selected and combined to meet various complex testing requirements.
5. Full-touch large-screen intelligent operating system, graphical UI design based on the detection process, the operation interface is simple and clear, easy to teach and learn.
6. A variety of pressure adjustment components and ranges are optional, with a wide air pressure range (-80KPA&-1MPa) optional.The optional electronic pressure regulating valve can realize multiple sets of pressure sequential tests.
7. Multiple communication interfaces: built-in RS232 serial port, RJ45 network port, USB communication interface, LTP external I/O control port, supporting multiple communication protocols.
8. Optional barcode scanning function and printer are available to facilitate product data management and quality traceability. The instrument history record can reach up to 200,000 items and can be exported to the computer in batches.
9. The standard volume identification function can automatically identify the volume of the sample to be tested, and measure and judge the leakage rate in a volumetric manner.
10. Ultra-high stability and ease of use have passed the rigorous test of the market.
11. A variety of accessories are available, including inflatable bypass, quick connector, and standard leak hole. At the same time, the instrument supports third-party calibration and can issue a calibration report.
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