The characteristics of the bubble defect of aluminum die casting:
The casting surface uplift, the size of a grain of rice, its interior forms the cavity.
The cause of bubble formation:
Molten liquid is not completely full of shot sleeve, easy to produce air entrapment, injection speed is too fast; The mold exhaust is not good; The gas in the molten liquid is not removed and the melting temperature is too high. The mold temperature is too high, the solidification time is not enough, the strength is not enough, and mold opening is too early, compressed gas expansion. Too much release agent. The design of the gate is not good.
The treatment method of the defects of aluminum die casting:
Take in the diameter of the pressure chamber, so that the metal melt can be completely filled with the pressure chamber. To extend the pressure injection time, to reduce the injection speed at the first stage, and to change the low speed and the high-speed injection switch points. Reduce the mold temperature and keep the heat balance. Adding exhaust chute, overflow chute, so that the exhaust is fully, timely removal of oil and waste from the exhaust tank. Adjust the smelting process and carry out degassing treatment. Prolong the holding time of the mold. Reduce release agent dosage.
The above article from KENOS official website (http://www.kenos-diecasting.com/) kenosblog1509
The original address: http://www.kenos-diecasting.com/news_show_115.html, reproduced please specify.
The casting surface uplift, the size of a grain of rice, its interior forms the cavity.
The cause of bubble formation:
Molten liquid is not completely full of shot sleeve, easy to produce air entrapment, injection speed is too fast; The mold exhaust is not good; The gas in the molten liquid is not removed and the melting temperature is too high. The mold temperature is too high, the solidification time is not enough, the strength is not enough, and mold opening is too early, compressed gas expansion. Too much release agent. The design of the gate is not good.
The treatment method of the defects of aluminum die casting:
Take in the diameter of the pressure chamber, so that the metal melt can be completely filled with the pressure chamber. To extend the pressure injection time, to reduce the injection speed at the first stage, and to change the low speed and the high-speed injection switch points. Reduce the mold temperature and keep the heat balance. Adding exhaust chute, overflow chute, so that the exhaust is fully, timely removal of oil and waste from the exhaust tank. Adjust the smelting process and carry out degassing treatment. Prolong the holding time of the mold. Reduce release agent dosage.
The above article from KENOS official website (http://www.kenos-diecasting.com/) kenosblog1509
The original address: http://www.kenos-diecasting.com/news_show_115.html, reproduced please specify.
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