The vacuum Drying Oven is specially designed for drying heat-sensitive, easily decomposed and easily oxidized substances, and can be filled with inert gas inside, especially some items with complex components can also be dried quickly. It is suitable for high-temperature treatment such as non-oxidative drying, defoaming, curing, welding, annealing, etc.
The vacuum degree of the vacuum Drying Oven was pulled to the required degree of vacuum, and after a while the degree of vacuum decreased. The vacuum valve and vacuum tube were replaced, but the status quo is still the same. What’s going on? This shows that the vacuum drying box is leaking. What should I do if the drying box leaks? How to check?
After the research and discussion of the vacuum drying box manufacturer, it is found that the most difficult thing to check is the air leakage of the inner tank. You need to pour some water inside the box, then close the door to vacuum, and then turn over the box. If there is an air bubble in a certain position, it is a leak. Gas point, if possible, use argon arc welding.
There are also some ways: inject nitrogen into the vacuum furnace and put down the foam where there is a possibility of leakage. If the foam continues to expand, it means that there is a gap; another way is to prepare a bucket of washing powder water and a syringe. It is possible for you to take the syringe Inject detergent water into the leaking place, carefully observe if there is a bubbling point at the injection point, it proves that this point is a leaking point.
If the seal of the box door is a little loose, as long as the negative pressure in the vacuum drying box reaches a certain level, there is no problem. First draw a vacuum to see if the negative pressure gauge can reach a standard atmospheric pressure. If the pointer changes slowly during the pumping process, try pushing the door in to see if it can be vacuumed. If it can be vacuumed, just Tighten the door a few turns and you're good to go. If pushing the door with your hands doesn't work. It is very likely that the screw fixing the heating block on the inner tank is loose, and the rear baffle needs to be disassembled (please wear gloves and a mask during the disassembly process, the general insulation surface is made of silicate material, which will be very sensitive to the skin) Uncomfortable) Then find the heating element and re-tighten the fixing screw that fixes the heating block.
