Aluminum Diecast Manufacturing Method and Related Components. Zinc diecast manufacturing is one of the many known metal casting processes used in the metalworking industry today. Other than aluminum, other alloys use other materials as well, which includes the following – aluminum and tin. Each of these casting metals has its own unique attributes that make them pretty useful.
For instance, among these said metals, magnesium is the one that is easiest to machine and it has a pretty good ratio between its weight and strength. On the other hand zinc is very easy to cast. It also has high impact strength and is really cost saving when manufacturing small parts.
Aluminum Diecast Production Process and Its Components
A method of metal diecast manufacturing involves injecting liquefied molten metal into steel molds that are otherwise known as diecast molds. Certain characteristics of aluminum alloy make it ideal for certain uses. First off, this metal alloy is corrosion resistant unlike iron that is prone to rust and quick decay. The materials that are created using aluminum alloy tend to be lightweight and more convenient to move around.
Included are other attributes of aluminum metals that make them very useful. Its high dimensional stability works very well for manufacturing thin walls and very complex figures. It also has great mechanical properties and it can remain very sturdy in spite of high temperatures. This metal alloy is also a good conductor of electricity and heat.
The traditional method of aluminum diecast manufacturing is also called high pressure die casting. This method of die casting parts has four consecutive steps – die preparation, filling, ejection, and finally shakeout. The preparation stage incorporates spraying lubricant into the cavity of the die, which helps make it easier to remove the aluminum alloy. Lubrication also helps in temperature control.
After the die is lubricated and prepared, molten aluminum metal is injected into the enclosure using very high pressure, which is where the name of this method was taken. The pressure in the die usually ranges from 1,500 psi to 25,400 psi, which is maintained until the metal alloy solidifies.
After the alloy inside have solidified then the dies are opened and the shot is ejected. The final step in the traditional method of aluminum diecast manufacturing is called the shakeout, simply because the scraps are removed or shaken off the casting. Manufacturers utilize a die cast trim die that is mounted on a power or a hydraulic press in the final step in the entire process.
Pros and Cons – Because a huge amount of pressure is used to fill the die, the cavity that needs to be filled by the cast is easily filled before any part or portion of the molten die cast alloy solidifies. This basically solves the initial problem of discontinuity in the casting. The drawback to this method is that air gets entrapped pretty easily thus producing small pockets or pores.
Regarding the amount of porosity in the center of the cast alloy part, vents are incorporated into the die. These vents are usually placed along the parting lines. Other finishing processes such as plating, hole-tapping, and buffing are utilized in order to obtain the best output in Aluminum die casting.