Inspection & testing in making sand casting

A sand casting, called casting sand molding, metal casting process characterized by the use of sand as the mold material. It is relatively cheap and relatively even refractory for use steel foundry. A suitable bonding agent (usually clay) or occurs mixed with the sand. The mixture is moistened with water strength and plasticity of the clay to develop and make the aggregate suitable for molding. Can the term “sand casting” also refers to solutions produced by sand casting process. Sand castings produced in specialized factories called foundries.

- A Inspection following, check for faults in solutions as well as solutions tonsure that the dimensions specified on the drawings and / or specifications.

- Inspection for defects can join many internal, depending on the specified quality of the solutions.

- The inspection and acceptance solutions sometimes used as is, but often it is subject to further processing can heat treatment, painting, rust oils preventive, surface treatment (eg, hot-dip galvanizing), and machining including.

- Closing of operations may include electrodeposited metal plated for either cosmetic or operational requirements.


The Brief Introduction of Metal Casting Process

metal casting processThe metal casting process is a complex process with combined working procedures. It includes the following main processes: first metal casting process is the preparation of production technology. Workers should make production plans and process files, draw the flow chart of machine tools and castings according to the pictures of castings to produce, production batch and delivery deadline. Second metal casting process is production preparation, including preparation for melting materials, modelling core materials, core box, sand box and other process equipment. The third process is modelling and making the core. And the last metal casting process is melting and casting;

Metal casting process is a metal forming method that makes the metal heated to be flowing, and then pours it into the mold cavity with a certain shape. Under the force of gravity or external power, such as pressure, electromagnetic force, centrifugal force, the casting cavity will be filled with liquid metal. After cooling and solidifying into machine tools, the metal castings will be finished.

Metal casting process will be the machining parts by cutting process. But there are many castings ofmachine tool without cutting process which can meet the precise requirements of the design and surface roughness. They can be directly used as machine parts.