2017-05-15 13:13:02

Sand Casting and Investment Casting

NINGBO REICAN MACHINERY COMPANY is a professional supplier for casting and machined part which is widely used for Automobile, Medical, earthmover, petroleum, electricity Industry, and in long-term business with foreign customers from North America and west Europe, we are exactly know what's the customer requirement when they provide drawings and material specification. And our engineering dept. can suggest the best process and technology to make the component or any design changing if necessary. Most of our products are exported to Canada, USA, and west Europe Germany, France, Denmark, Italy, Norway,Turkey, Finland, Switzerland, etc. and win good reputation among our customers.

Sand casting, the most widely used casting process, utilizes expendable sand molds to form complex metal parts that can be made of nearly any alloy. Because the sand mold must be destroyed in order to remove the part, called the casting, sand casting typically has a low production rate. The sand casting process involves the use of a furnace, metal, pattern, and sand mold. The metal is melted in the furnace and then ladled and poured into the cavity of the sand mold, which is formed by the pattern. The sand mold separates along a parting line and the solidified casting can be removed. The steps in this process are described in greater detail in the next section. In sand casting, the primary piece of equipment is the mold, which contains several components. The mold is divided into two halves - the cope (upper half) and the drag (bottom half), which meet along a parting line. Both mold halves are contained inside a box, called a flask, which itself is divided along this parting line. The mold cavity is formed by packing sand around the pattern in each half of the flask. The sand can be packed by hand, but machines that use pressure or impact ensure even packing of the sand and require far less time, thus increasing the production rate. After the sand has been packed and the pattern is removed, a cavity will remain that forms the external shape of the casting. Some internal surfaces of the casting may be formed by cores.

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Aluminium Sand Casting parts
For most of the current products, the processes we use are: sand casting (green sand & dry sand), die casting, permanent casting...

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Aluminum Sand Casting parts
We can supply aluminum and ductile iron products in permanent mold casting process, sand casting process and green sand casting...

Investment casting can make use of most metals, most commonly using bronze alloys, stainless steel, and tool steel. This process is beneficial for casting metals with high melting temperatures that can not be molded in plaster or metal. Parts that are typically made by investment casting include those with complex geometry such as turbine blades or firearm components. High temperature applications are also common, which includes parts for the automotive, aircraft, and military industries.

The process is generally used for small castings, but has produced complete aircraft door frames, steel castings of up to 300 kg and aluminium castings of up to 30 kg. It is generally more expensive per unit than die casting or sand casting but with lower equipment cost. It can produce complicated shapes that would be difficult or impossible with die casting, yet like that process, it requires little surface finishing and only minor machining.

Investment casting is used in the aerospace and power generation industries to produce turbine blades with complex shapes or cooling systems. Blades produced by investment casting can include single-crystal (SX), directionally solidified (DS), or conventional equiaxed blades. It is also widely used by firearms manufacturers to fabricate firearm receivers, triggers, hammers, and other precision parts at low cost. Other industries that use standard investment-cast parts include military, medical, commercial and automotive.

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Lost wax casting mold
Material: ASTM 430;ASTM410;ASTM 416,ect.Carbon Steel:WCB,AISI1020;AISI1045;S355J2G3,S235JR,ect Process: lost wax process Used for Agricultural machines; lifting machines; grinding machines; medical  ...

 

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