- Determination and analysis of die casting process
Time:
2023-04-20
The die-casting process is the process of unifying pressure, speed and time by using the three major elements of machine, mold and alloy. For metal thermal processing, the existence of pressure is the main feature of the die casting process that distinguishes it from other casting methods. Die casting is a fast-growing special casting method with less cutting and no cutting in modern metal processing technology. It is the process of filling the mold with molten metal at high pressure and high speed, and crystallizing and solidifying under high pressure to form a casting. High pressure and high speed are the main characteristics of die casting. The commonly used pressure is tens of megapascals, the filling speed (inner gate speed) is about 16-80 m/s, and the time for the molten metal to fill the mold cavity is extremely short, about 0.01-0.2 seconds.
The die-casting process is the process of unifying pressure, speed and time by using the three major elements of machine, mold and alloy. For metal thermal processing, the existence of pressure is the main feature of the die casting process that distinguishes it from other casting methods. Die casting is a fast-growing special casting method with less cutting and no cutting in modern metal processing technology. It is the process of filling the mold with molten metal at high pressure and high speed, and crystallizing and solidifying under high pressure to form a casting. High pressure and high speed are the main characteristics of die casting. The commonly used pressure is tens of megapascals, the filling speed (inner gate speed) is about 16-80 m/s, and the time for the molten metal to fill the mold cavity is extremely short, about 0.01-0.2 seconds.
1. Die-casting parameter tester, first-level, second-level and booster conversion point time,
2. Influence of boost starting point on die casting quality:
When filling 80% after the first stage starts, change the time of the second stage and the start transition point of boosting, and finally hold the pressure, otherwise the quality will be affected.
3. The wear of the injection punch is hindered, and the impact of poor injection on the die-casting parameters;
4. Analysis of the causes of injection chamber and punch wear:
The fit gap between the injection chamber and the punch is less than 0.1 mm. The back and forth friction between the punch and the press chamber will cause high temperature and easy damage. The diameter of the press chamber will become larger and the punch will become smaller. The punch will be stuck by aluminum chips, which will affect the transfer of the press chamber. The speed and pressure are not convincing, so the punch should use high temperature resistant lubricating oil, the injection rod must be opened with cooling water, and the punch material should also be selected, generally ductile iron or beryllium bronze.
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