In the jewelry casting, pulping equipment usually use eggbeater and vacuum beater.Due to the different two kinds of equipment in the selection of vacuum pump and the beating speed, paste evenly and related to many aspects: surface, wet strength, high temperature strength and so on, the pulping effect is not same, ultimately affect the
Casting quality. At present jewelry industry pulping equipment in pulp and speed is the same, the basic control of /MIN~382 at 150 /MIN, but the choice of vacuum pump is not the same, so that some enterprises have differences in the casting quality
Here emphasize two points:
1 the flow of vacuum pump (such as 15L/S) theory of value is not equal to the actual value. Factors influencing the flow of exhaust pipe length, diameter, pumpingaperture. The general design of the vacuum pump has the index corresponding to the vacuum pump. 15L/S for example, length is 60~90cm, diameter of not less than 25mm,
Diameter shall be not less than 20mm.. Is consistent with the above indicators of the companies after investigation, casting quality can be effectively controlled
2 is not a speed as quickly as possible. The beating device design speed is to adapt to the jewelry casting powder properties, when the speed is greater than 800 /min,casting gypsum powder in the change, reduce the plaster mold strength. We passed the test and the test of long, think jewelry industry with casting powder pulp and speedshould be controlled
In 150 /MIN~380 /MIN