The two-box thermal shock Test Chamber is used for electrical components, automation components, communication components, auto parts, metals, chemical materials, plastics, etc. Through the national defense industry, aerospace, ordnance industry, BGA, PCB substrate, electronic chip IC, semiconductor ceramics and polymer materials, it can test the repeated low tension of materials to high-low temperatures, and the chemical changes or changes of products in thermal expansion and contraction. Physical damage to confirm the quality of the product. From precision ICs to heavy mechanical components, no one does not need a good test tool.
1. Countermeasures to prevent electrostatic disasters
(1) Static Disaster
(2) Generation of charge
(3) Accumulation of charges
(4) Discharge phenomenon
(5) Flammable substances
If one of these conditions is eliminated, disaster can be prevented. It is important to judge exactly which of these four parts to stop and take appropriate countermeasures. As a basic measure to prevent static electricity disasters, we plan to introduce specific methods from the perspective of preventing and suppressing static electricity.
Second, the method of suppressing static electricity
(1) Suppress the generation of static electricity during the operation of thermal shock test equipment: Since the source of static electricity is friction or separation between objects, these effects should be suppressed as much as possible. In operations such as liquid pipeline transportation, dust air transportation or plastic extrusion, it is better to reduce the speed. In fact, it can affect productivity. The safe flow velocity of oil is below 1m/s. Due to different substances, the charge or polarity of static electricity is different. Therefore, the feasible measure is to avoid the use of insulators that are easy to charge, and use materials that are not easy to generate static electricity to combine them.
(2) Promotion of charge leakage: In disaster countermeasures, the simple method is grounding. This method is to make the generated electric charge disappear quickly to the earth through the metal conductor. However, with this method, if the charged body is conductive, it is easy to eliminate, and insulators such as plastics, chemical fibers, and petroleum are difficult to move due to the charge of the charged part, so the effect is not large.
(3) Adding conductive materials to objects: including adding metal powder or carbon black to tires or operator boots and floor materials in chemical plants, and using hydrophilic oil to chemical fibers or plastics to prevent electrification. If the relative humidity in the air increases, a water-absorbing layer will be formed on the surface of the object to enhance conductivity, and it will hardly be charged when the humidity exceeds 80%. For this reason, where there is a possibility of charging, you can increase the temperature and humidity adjustment device of the box or spray water to increase the humidity. But the problem is that people may feel uncomfortable, or have adverse effects on equipment and products.
The above are the countermeasures and methods on how to prevent static electricity during the operation of the two-box thermal shock Test Chamber.
