The control of the surface temperature of zinc alloy die-casting is very important for the production of high-quality die-casting parts. Uneven or inappropriate zinc die-casting Mold temperature will also cause the size of the casting to be unstable, and the casting will be deformed during the production process, resulting in defects such as thermal pressure, Mold sticking, surface depression, internal shrinkage and hot bubbles.
When the temperature of the zinc die-casting mold is very different, it will have varying degrees of influence on the variables in the production cycle, such as filling time, cooling time and spraying time. There will be cold lines, mainly because the temperature at the front of the molten soup is too low, and there are traces when they overlap.
1. Check whether the wall thickness is too thin (designed or manufactured), and the thinner area should be directly filled.
2. Check whether the shape is not easy to fill; too far, closed areas (such as fins, bumps), blocked areas, too small fillets, etc. are not easy to fill. And pay attention to whether there are ribs or cold spots.
3. Shorten the filling time.
4. Change the filling mode.
5.Increase the mold temperature.
6.Increase the temperature of the molten soup.
7.Check the alloy composition.
8. Enlarging the escape airway may be useful.
9.Adding a vacuum device may be useful.
When making a die-casting mold, it is not only necessary to control the temperature of the zinc die-casting mold. Also pay attention to other details. No matter which part of the problem occurs, it may cause problems such as chromatic aberration and surface damage on the surface of the zinc alloy die casting. Therefore, if we want to complete the zinc alloy die casting, we must make every ring.
Link to this article：How to control the temperature of the zinc die-casting mold
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