Superthin-wall aluminium-alloy high-speed pressure casting method

Abstract

This present invention relates to a method of high speed die-casting of super thin wall aluminous alloy. It comprises the steps as follow: putting a model in a die-casting machine, setting up the die-casting parameter, keeping the casting pressure at 780kg / cm2, model temperature 250Deg.c, solvent temperature 700Deg.c, then injecting the aluminous alloy into die-casting machine. Shoot up with 0.23m / sec to make cast whose wall thickness is less than 1.0mm, then take the cast out and plastic, smear, detect to satisfy international standard. This cast can be applied mainly in 3C product while the crust of computer, digital camera and mobile telephone.

Description

technical field [0001] The invention relates to a high-speed die-casting method for an ultra-thin-walled aluminum alloy, in particular to a copper-added aluminum alloy. By setting the parameters of a high-pressure forming machine, a casting with changed original tensile strength can be produced to make it light and thin. , Short advantage. Background technique [0002] At present, the scope of application of thin-walled products in the industry is mainly the casing of 3C products, such as: notebook computers, digital cameras, mobile phones, and CD players. The main production methods are injection molding, metal die-casting or stamping products. Magnesium alloys are usually used in metal die-casting. However, since the cost of die-casting and surface treatment of magnesium alloys is higher than that of aluminum alloys, the metal texture and characteristics are also inferior. When magnesium alloys are better, aluminum alloys are gradually replacing magnesium alloys in the de...

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Problems solved by technology

[0003] In general, traditional die-casting aluminum alloys are melted in the mold cavity and cooled very quickly in die-casting. When forming thin-faced castings, it is difficult to fill the mold and the material is not rigid enough. There is a possibility of deformation when the casting is ejected. Therefore, die-casting The aluminum alloy used must adjust the composition of the alloy to increase the strength and rigidity of the material

[0004] Therefore, when making castings with thin walls and large surfaces, engineers usually design the wall thickness of the castings between 1.5 and 2.0 millimeters (mm), or even larger, to avoid the casting being too thin and the metal solution not being poured into the mold. However, for the current general portable 3C products, the casting thickness of 1.5 to 2.0 millimeters (mm) is still too high to meet the needs of 3C products. In view of this, how to reduce the cost of aluminum alloy die-casting Thickness, so as to meet the needs of 3C product use, is what the inventor wants to improve

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