Casting iron fittings often produces various casting defects in the production process.Now HEBEI JINMAI CASTING CO.,LTD. tell you how to prevent such defects has always been a problem that casting manufacturers are concerned about.

The production workshop mainly uses the traditional green sand casting process to produce steel castings.In the long-term production,it is found that the following casting defects mainly occur in the steel castings,such as sand holes,sticking sand,pores,holes,sand inclusion and scarring,swelling,sand these.

1.Preventive measures for trachoma:

(1)Strictly control the performance of molding sand;

(2)Before closing the box,solve the floating sand on the surface of the concave mold and the sand core neatly and stably close the box;

(3)Set up appropriate and effective pouring system software;

(4)the surface layer of the pouring cup should be smooth and clean,and there can be no floating sand.

2.Preventive measures for sand sticking

(1)Use sand with high fire resistance;

(2)Moderately reduce the pouring temperature and increase the pouring rate;

(3)The compactness of the sand mold should be high(generally more than 85)and well-proportioned;

(4)Select architectural coatings that do not crack at high temperatures and do not sinter into molten holes.

Welcome to consult our company for various casting problems.