Improvement of China manufacturer slurry pump casting process:
Aiming at the causes of gas shrinkage defects of slurry pump impeller, the process was improved according to the current situation.
1. Improve the riser system, change the original side riser into two roof risers, and the two roof risers are closer to the hot node under the water outlet.Because the top riser is more efficient than the side riser, it can play a better role in the feeding.
2. When making the core, put the straw rope ball, and set the overflow device at the water outlet to better play the role of exhaust.
3. Before pouring with hot fan to bake for 1 h under 200 ℃, in order to prevent the sand moisture absorption, reduce the gas evolution of resin sand.
Slurry pump does not rotate after startup: slurry pump does not rotate after startup. First, confirm whether the transfer connection belt is damaged or too loose. If the pin is broken and the connection belt is too loose, the slurry pump will not rotate.
Secondly, it is necessary to check whether there are foreign bodies into the slurry pump, if there are foreign bodies stuck between the impeller and the front and rear liner plate, or discharge material is not timely caused by media accumulation, the water wheel can not rotate.
