Analysis of the causes of delamination of white corundum powder products
White corundum powder is a white corundum powder obtained from white corundum blocks as raw materials through acid washing with water
When processing white corundum powder, the mold sleeve becomes larger under high pressure and contracts when not pressurized, causing the intermediate layer to crack and swell up and down.
“The gas in the molding material has not been exhausted, and both sides have been compacted and concentrated in the middle of the air layer. After removing external pressure, the gas expands to the middle starting layer.”.
3. Water presses down from the pressure side. Bilateral pressure leads to concentration and reduced strength in the middle and lower portions. Therefore, it can also cause layered waste. Even if there are no cracks after molding, cracks may occur during the firing process, so drying is more reasonable if the plate can be dried.
4. When the pressure is very high, the blank has a high elastic stretching effect. The finer the particle diameter of white corundum powder, the closer the indirect contact between the particles, and the smaller the change in stress transfer. During the pressing process, using double-sided pressure, the bonding force between the intermediate layers of the product is the weakest. The friction force from the middle to the bottom is different, and the elasticity is different, resulting in initiation cracks under the action of elastic stress.