High-quality polishing wheels are honed, so every level is strictly checked.
1. Choice of pressure and speed
The selection of the injection specific pressure of the polishing material polishing wheel should be determined according to the structural characteristics of different alloys and castings. For the selection of filling speed, generally for castings with thick walls or high internal quality requirements, a lower filling speed and high boost pressure should be selected; for castings with thin walls or high surface quality requirements and complex castings, you should choose High specific calendar and high filling speed.
2. Pouring temperature
The pouring temperature of the polishing material polishing wheel refers to the average temperature of the liquid metal when it enters the cavity from the pressure setting. Since it is inconvenient to measure the temperature of the liquid metal in the pressure chamber, it is generally expressed by the temperature in the holding furnace.
The casting temperature of the polishing wheel of the polishing material is too high and the shrinkage is large, which makes the casting prone to cracks, large grains, and sticky molds; the pouring source is too low, and defects such as cold shuts, surface patterns, and insufficient pouring are prone to occur. Therefore, the pouring temperature should be considered together with the pressure, die temperature and filling speed.
