The causes of large cast iron platform casting defects and solutions

    Large assembly platform for cast iron in the process of casting will produce blowhole sand holes and other casting defects, then what is the cause the cause of the defects?

1, the two strands of metal flow out of sync with traces of cast iron platform model.

2 low mold temperature, cast iron platform, such as zinc alloy die temperature below 150 ℃, aluminum alloy die temperature below 180 ℃, flow mark defect is easy to produce cast iron platform.

3, cast iron platform when the filling speed is too fast, the temperature is too high.

4, cast iron platform paint dosage too much.

The above four are prone to casting defects.

Large assembled cast iron platform in often will have some flow mark defect, to prevent the occurrence of such defects should do the following:

1, adjust the gate area or position.

2, adjust the mold temperature, cast iron platform cast iron platform chute.

3, adjust filling speed so as to change the flow of liquid metal filling cavity.

4, besmear brushs refractory coating on cast iron platform disappear model should be thin and uniform.