Compared with sand and gravity casting, the microstructure of traditional die casting is not satisfactory, mainly because the jet of high-speed metal flow at the gate is more accessible to the air in the mold cavity than when the metal is slowly fed into the sand or metal mold cavity.
In the production of lost die casting, slag defects often occur. Many people may not understand the slag defects
Some steel casting manufacturers in the production of products, will choose to use sand casting for production, then the chemical hardening plays a very important role, generally will use three ways to harden: (1) heating hardening; (2) Self-hardening; (3) Fog hardening.
The defects of sand casting are: cold isolation, lack of pouring, porosity, sand adhesion, sand clamping, sand hole, sand swelling and so on.
When we start to make molds, products need to shrink, different products shrink will have certain differences, such as thin products, large products will encounter, so there is no absolute standard shrinkage rate, but there will be a range.
At present, there are many kinds of processes for casting aluminum alloy parts, and the most used are two kinds of aluminum alloy and die-cast aluminum alloy, so what is the difference between the two processes?
In the manufacturing industry, vacuum die casting and aluminum alloy die casting are two commonly used manufacturing processes. These two processes have different characteristics and advantages, and have a wide range of applications in different fields.
Sand casting refers to a method of producing castings in sand mold, sand casting is generally composed of sand and core sand, sand and core sand are mixed with silica sand and clay or binder material and water in accordance with a certain proportion, sand and core sand to have "one strong three characteristics",
Aluminum alloy die casting in the process of reproduction more or less will produce some problems, such as sand holes, water marks,
The performance of zinc alloy die-casting parts is very good, and generally there will be no problems. When the die-casting factory is doing the polishing of zinc alloy, it is found that there are sand holes on the zinc alloy die-casting parts. What are the reasons for the sand holes?
Sand hole is a common name for the "hole" defect in the mechanical processing of the internal die-casting parts, mainly manifested as sand hole and slag hole two types.
