Aluminum casting die casting process
Aluminum casting die casting process is not required to consider the following questions:
1) within the liquid metal in the gating system can clean, smooth flow, does not produce separation and vortex.
2) there exist angular zone or dead zone?
3) whether there is cross-sectional area gating system change?
4) The performance of paint coatings produced gas analysis: as to create air porosity of aluminum castings have a direct impact. Spraying process: the use of excessive, resulting in large gas evaporation, the punch lubricant too much, or burning, are the source of gas.
5) The way to solve the first aluminum casting porosity analyze what causes the pores, again to take corresponding measures.
1) dry, clean alloy material.
2) control the melting temperature to avoid overheating, for in addition to gas processing.
3) a reasonable choice casting process parameters, the extraordinary is the injection speed. High-speed switch to adjust the starting point.
4) The order of the
High Pressure Sodium Lamp filled with the help of gas discharges, sprue and runner of sufficient length, to facilitate the smooth flow of alloy liquid and gas have the opportunity to discharge. Can change the gate thickness, gate direction, the formation of pores in the position to set the overflow tank, exhaust ducts. Sectional area of the overflow product can not be less than the sum of the gate within 60% of the total cross-sectional area, or slagging poor results.
5) Select and control of spray paint of good volume. Ideas to resolve deficiencies as the cause of each defect from a number of different factors, so the actual production to solve the problem, because in the end face of the many non-merits and demerits of the first transfer machine? Or before refueling? Or amended prior to mold? Propose that the degree of difficulty, after the first complex to deal with simple,
The order:
1) removal of sub-surface, cleaning the cavity, clean-up mandril; improved coatings, to improve the spraying process; increased clamping force to increase the amount of cast metal. These operations can be implemented by simple measures.
2) adjusting the process parameters of injection strength, injection speed, filling time, mold time, casting temperature, mold temperature. 3) for materials, select high quality aluminum alloy ingots, the new material and back to change the ratio of charging to improve the melting process.
Such as aluminum castings produced flash of reasons:
1) aluminum casting problem: adjust the clamping force does not.
2) Technical Problems: injection speed is too high to form a high pressure shock peak.
3)
Nonstick Cookware mold problems: deformation, surface debris type, inserts, sliders are worn not flush, the template is not enough strength. Measures to solve the flash sequence: clean parting surface to improve clamping force adjusting the parameters of mold wear parts repair improve mold stiffness.
Aluminum casting die casting process
By: zll10417
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