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Pouring rate plays an important role on aluminun casting
megan2008
Aluminum is a versatile material within many different industries, especially for creating automotive castings. In fact, automotive transmission housings and pistons are made from aluminum castings. However, the aluminum casting form must be created with particular specifications for the overall assembly to work correctly. Aluminum pouring rates during manufacturing have a direct effect on the final casting form.

Aluminum Casting Features

Molten aluminum can be formed into almost any shape. Aluminum casting uses a mold assembly for holding molten metal. The mold's shape determines the final aluminum form. The molten aluminum lines the mold and cools until it has hardened. Workers remove the mold to reveal an aluminum part or item. Casting is an inexpensive manufacturing process for producing numerous aluminum items.

Rapid Pouring Rate

One of the simplest methods for pouring molten aluminum into a casting is using basic gravity. The aluminum travels downward from a holding container and into an open mold. However, workers must be careful during pouring for avoiding the addition of dross, or unwanted debris. One way to avoid dross additions is creating a rapid pour rate. Pouring the molten aluminum quickly prevents dross additions, but the aluminum encounters turbulence during the pour, which adds air into the mixture. Excess air mixed with the molten aluminum compromises the final aluminum product. The hardened aluminum's composition can have air pockets, rather than a solid form, making the item crack easily under stress.

Slow Pouring Rate

A slow pouring rate creates a quality aluminum casting. Molten aluminum has natural chemical reactions with moisture and air, compromising the final composition. Slow pours typically enter the mold through the bottom or the sides, as opposed to dropping downward with a gravity pour. The molten aluminum remains as one mass as it enters the mold, retaining a solid composition. The aluminum mass also keeps most of the metal's surface area protected from outside chemical reactions, such as oxidization.

Slow-Pouring Machinery

Typically, slow aluminum pours are instigated by machines rather than workers. Aluminum movement can occur by using a vacuum for pulling the metal or pushing the material with air pressure. Pumps are also used for creating centrifugal forces for metal movement.

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<br>KYLE'S KRITTERS Red Pandas</br><br>Sophia moved here from a zoo in Virginia around the same time that He-Ping arrived from the Milwaukee Zoo. The two were matched with each other under the recommendation of the Association of Zoos &amp; Aquariums Species Survival Plan. I guess you could say it's like a dating service for animals. Zoos participate in SSPs to allow for genetic diversity among animals and healthy populations. Red Pandas are native to bamboo forests in China, the Himalayas and Myanmar. They are endangered because of hunting and loss of habitat. They just adore the bamboo so with the trees being torn down, their food source is getting depleted. They don't mind the cold weather because they have those thick fur coats. Their faces are precious. You can pick out He-Ping pretty easily because his face is whiter than Sophia's face. There is much debate as to whether Red Pandas are related to Giant Pandas. The Giant Panda from China is in the bear family. Red Pandas are more closely related to raccoons. They are actually considered to be in their own family. (Copyright KUSA*TV, All Rights Reserved) </br> BBBBBB
 
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