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Controlling the surface temperature of die-casting molds is of great significance to the production of high-quality die-casting parts. Uneven or inappropriate die casting mold temperatures can also cause dimensional instability in castings. During the production process, the casting will be ejected and deformed, causing defects such as hot pressing, sticky molds, surface depressions, shrinkage holes, hot bubbles, etc. When the mold temperature difference is large, the variables such as filling time, cooling time and spraying time in the production cycle will be affected to different degrees.
Reason: The temperature in the front of the melted soup is too low, and there are traces when overlapping.
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Reason: Due to the sudden drop in pressure, the gas in the molten soup suddenly expands and hits the mold, resulting in damage to the mold.
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The cross-sectional area of the runner should not change rapidly.
Reason: When a metal solidifies from a liquid to a solid, it takes up less space. If there is no metal replenishment, shrinkage will form. Usually occurs where the solidification rate is slow.
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Reason: The molten soup is flowing too slowly, or too cold, or not filled in a good way, so there are holes in the solidified metal joints.
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