Pure aluminum castings are not difficult to make. Nowadays, when applied to various heat sinks, you may think that it is easy to stick to the mold during the die-casting production process. The following are recommendations for die-casting of multi-year aluminum alloys.
1》 The selection of release agent should be appropriate (not cheap, it is better to buy pure aluminum alloy release agent specially developed by Germany and Taiwan Dunhuang, which is very useful)
2》 Maintenance of melting temperature (the boiler temperature should be kept above 720 ° C as much as possible, and the temperature probe should be made of silicon carbide material, which is more accurate and not easily corroded by aluminum liquid)
3》 The use of graphite material in the crucible of the melting furnace is not likely to cause a large temperature difference between the upper and lower parts.
4》 The surface temperature of the mold should not be lower than 220 ° C.
5》 The cooling time after injection is not easy to be too long, and the ejection time after mold opening is within 0.3 seconds.
6》 The feeding port of the mold is thicker than that of aluminum alloy.
7》 The smoother the flow rate between the channel and the feed inlet during injection, the better.
8》 Spray the product automatically as far as possible, otherwise the mold surface temperature is not easy to maintain stability.