Solving Measures of Casting Aluminum Alloy

Because each kind of defect produces the reason to come from many different influence factors, therefore must solve the question in the actual production, in the face many reasons in the end is the non-power first to adjust machine? Or the first refueling? Or modify the mold? Recommended by the degree of difficulty, the first simple to deal with the complex, the order:

1) clean up the sub-surface, clean cavity, cleaning ejector; to improve the coating to improve the spraying process; increase clamping force, increasing the amount of metal casting. These measures can be implemented by simple operation.

2) adjust the process parameters, injection pressure, injection speed, filling time, mold opening time, casting temperature, mold temperature.

3) refueling, selection of high quality aluminum alloy ingot, change the proportion of new material and return to improve the smelting process.

4) modify the mold, modify the gating system, increase the gate, additional overflow tank, exhaust slot and so on.

For example, flash casting die casting for the following reasons:

1) die-casting machine problem: clamping force adjustment wrong.

2) process problems: injection speed is too high, the formation of pressure shock peak is too high.

3) mold problems: deformation, sub-surface debris, inserts, slider wear uneven, template strength is not enough. Solve the flash sequence of measures: clean up sub-surface → increase the clamping force → adjust the process parameters → repair mold wear parts → improve the mold stiffness. From easy to difficult, every step to improve, first test its effect, no further second step. Adding rare earth in casting aluminum alloy can effectively improve the defect of cast aluminum alloy in Kunshan.