Castings for Cast-Parts

Factors Affecting the Aluminum Casting Process. Since Aluminum is one of the very few metals which can be used in almost any type of metal casting processes, the selection of the process to use is then based on two factors. The first factor being feasibility and cost and the other one is quality.

On the feasibility factor, aluminum alloy casting may be done by way of any of the available methods of metal casting. Aluminum casting process is easier to choose since this metal can be used in all processes. On some of these metal casting processes however, design feature as well as dimensions are the best determinants of the best method for casting. For instance, with metal molds weighing between 10 to 100 as much as the castings used when manufacturing, most huge cast products are done as sand casting instead of die casting or permanent mold casting. For smaller castings though, metal molds are used which ensures accuracy of dimensions.

The quality factor is also quite important in the aluminum casting process to be used. Quality in aluminum casting processes refers to the mechanical properties’ levels and the degree of soundness of the casting. The former refers to properties of ductility and strength and the latter refers to the absence of porosity, surface imperfections as well as cracking of the aluminum cast parts. It is however, especially with die casting, to completely eliminate porosity despite high cooling rates because air still tends to be trapped. This results into a small amount of porosity located at the center of the casting product.

Aluminum Casting to the Layman. Aluminum casting processes, aluminum cast parts and aluminum part castings are technical terms that may not be easily pictured by the laymen who are not particularly knowledgeable with metallurgical processes. These three terms are mainly about processing of aluminum. Aluminum casting processes involve different processes done in aluminum. Some of these said processes are die casting, permanent mold casting and many more. Aluminum cast parts and aluminum part castings pertain to the separate parts used in the casting process.

Aluminum casting process uses different innovations that are responsible for molding aluminum into different shapes, ranging from simple shapes to more complicated ones that are near impossible to be made. It cannot be compared to stamping because it is more complex. This process is done in making different products that are commonly used nowadays like aluminum plates, foils, some aluminum shapes for vehicles, construction and others.

The basic and traditional way of aluminum casting is by pouring liquidized Aluminum into a caster, which is a molded metal with a specific shape. Since the surface is cooled, there is no need for a contacting mold, although imperfections can be fixed by scalping. Different technological innovations for smaller sections are available. This is where the solid aluminum is formed in the caster and immediately molded into a section without any handling or interruption of metal. However, this process needs good relationship and control of the casting, rolling, coiling and other material-handling phases.

If ever you are planning to start an aluminum casting company, then you should remember every detail done in the process. This way, you can become a successful aluminum casting business owner.

Different Aluminum Castings Processes. Majority of the aluminum casting processes made in the United States are for automotive industry. Aluminum cast parts are also frequently used in power transmission, architectural structural and ornamental purposes. Aluminum cast parts are commonly utilized in vehicles such as aircraft, trucks, automobiles, railroad cars and others.

Aluminum casting process involves the melting of the aluminum or aluminum alloys and pouring it into a mold of preferred shape and allowed to harden. The solidified casting is then ejected out to complete the process. Casting is preferable in the production of complex shapes and more refined surface. It is oftentimes used in shaping materials such glass, plastics, metals and alloys.

In casting aluminum processes, feasibility and cost factors, and quality factors have significant effect in the selection of which casting method should be used. There are various methods involve in the aluminum casting processes, and these are grouped into two categories: expendable mold casting and non-expendable mold casting. The expendable mold casting involves the use of temporary, non-reusable molds and these include the waste molding of plaster, sand casting, plaster casting of metals, casting of plaster, concrete, or plastic resin, shell molding, investment casting, and unbonded sand processes. Nonexpendable mold casting on the other hand, as differentiated from those methods under the expendable mold castings, need not be reformed after each production cycle; and these include the permanent mold casting, die casting, semi-solid metal casting, centrifugal casting, and continuous casting. Some other methods of casting are lost foam, squeeze casting, and hot isostatic pressing.

Aluminum Casting Parts. Die casting is commonly used in the production of engineering metal parts. Die casting involves the process of forcing molten metal under pressure to create reusable steel mold or die. Die casting process can be used in both ferrous and non-ferrous metals, but are more commonly used in non-ferrous metals such as aluminum, copper, lead, magnesium, tin based alloys and zinc. As compared to sand molding, die casting is produced quicker and more economically in automatic machineries, and multiple production of similar parts can be cast in just one operation by using multiple dies. Die casting is preferable in the production of tools which require more refined and more detailed process.

Aluminum die casting is a process which involves the placing of melted aluminum metal under pressure and forcing it into a steel mold or die. Aluminum die casts are lightweight alloy which has one-third of the steel’s density, and stiffness. Its light weight makes it useful in the manufacture of tools which place importance to mobility and energy conservation. Aluminum cast parts are commonly used in the construction of aircraft, railroad cars and automobiles. Due to its great resistance to corrosion and high-heat conductivity, Aluminum cast parts are frequently used as well in the manufacture of hardware and tools. Aluminum cast parts are characterized by high thermal, electrical conductivity and strength at high temperatures. These characteristics of Aluminum cast parts made it widely used in the manufacture of cooking utensils and pistons of internal-combustion engines. Aluminum wire is thicker yet lighter than a copper wire, this makes it preferable in long-distance, high-voltage power transmission.

Die Casting for Aluminum Casting Parts. There are many methods with which manufacturers can produce aluminum cast parts. They can choose to go with sand casting, gravity-fed casting, investment casting, or permanent mold casting, just to name a few. However, it is die casting that manufacturers go for. Moreover, more than any other metal alloys available, they choose to go with aluminum alloys. In fact, in the United States alone, around two-and-a-half billion dollars worth of aluminum cast parts made from die casting is produced every year. The die casting process mainly involves the forcing of molten aluminum metal into cavities in order to make molds, which are referred to as dies, hence the name.

Aluminum cast parts from the die casting process are best produced in large quantities of small parts. Castings can weigh as much as fifty kilograms, but aluminum part castings usually weight at around five kilograms. Costs in high tooling and casting equipment are completely justified and are in fact relatively cheaper than those used by other casting methods.

Various applications of aluminum cast parts made with die casting typically include aluminum alloys such as Alloy 380.0, Alloy A380.0, Alloy 360.0, Alloy 413.0, and Alloy 518.1, among many others. Once these alloys are turned into aluminum cast parts, they are used for lawnmower housings, streetlamp housings, dental equipment, gear, typewriter frames, cover plates, frying skillets, instrument cases, auto parts, connecting rods, pistons, conveyor components, lit tings, aircraft and marine hardware, and escalator parts, to name some. The aluminum casting process is indeed one of the most useful processes in the metalworking industry today.