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Shenzhen WT Hardware and Plastics Limited

contact:Henry yang

Mobile: +86-8923768676

Tel: +86-755-27673590, 23143539
Fax: +86-755-23143536
Add: 5B2, Jiangshi Building, Fuyong, Shenzhen, China
Our main products: Injection Mold, Molding Parts, Die Casting Mold, CNC machining of high quality


Why Can Not Aluminum Die-casting Hole Processing Exceed 0.25mm?
Oct 19, 2017

Why can not aluminum die-casting hole processing exceed 0.25mm?

In order to be suitable for die-casting, human beings have added a lot of silicon (si) to the aluminum alloy. When the aluminum alloy is coagulated in the mold, the silicon will float to the surface and form a thin layer of silicon. This layer of silicon is very hard and hard to wear. Some OEM designers use this feature. The inner surface of the die casting piece is directly counted as bearing surface. The silicon surface layer is generally only 0.2 to 0.9mm thick. Too much processing will shorten the life of the bearing surface.

Why is your aluminum die cast appears black spots in the time of polishing?

There are several reasons for this. It could be silicon oxide or the formation of alumina. The solution is simple, using fresh aluminum ingots. However, the greatest possibility is that it comes from the mold release agent. Maybe, we spray too much mold. It is also possible that molds are too high in organic matter. Some of these organisms are reduced to carbon in the heat of molten aluminum, some of which are organic macromolecules. The mix of these carbon molecules and polymers, when aluminum castings are formed, is included in the surface as a black spot we see. We can reduce the spray concentration, use another spray, or extend the airtime after the spray is extended. In order to reduce the carbon element, and to prevent the accumulation of macromolecule polymer. Another common practice is. Use the degaser to wash it.

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