Casting method for injection molding of metallic powder

Metal powder injection molding (MIM) using powder metallurgy technology can be sintered density, good mechanical properties and surface quality of machine parts, is generally used in the production of small size and shape of complex products, such as the MIM mobile phone accessories, MIM intelligent wear, MIM auto parts, micro gear of complex precision components for powder metallurgy, powder metallurgy small module gear, etc.

Preformed billet is metal injection molding (MIM) technology of powder metallurgy casting powder is very important part of the material composition on the need of foundry goods necessary parts planning and material selection, parts shape planning, and concluded that the casting method, and then into the preform billet planning and mould processing, usually produce what kind of casting methods are there? After professional technical experience, dahong new material has concluded that the following casting methods can be used in the actual operation of MIM technology.

1. Flash casting: the preformed blank formed by this casting is relatively simple in shape, and the final shape of the parts is obtained by casting. In the process of pier forging, the powder has a large lateral movement until it fills the mold cavity, and a small number of flanges are extruded from the closing seam in the casting process, which requires a small number of follow-up machining.

2. Closed casting without flanges: the shape of the preformed blank of this casting method is also relatively brief. MIM experts found that various casting methods also filled the mold cavity through the lateral movement of powder.

3. Hot compaction casting method: the shape of preformed blank made by this casting method is very similar to the final forging method, so the lateral movement deformation of metal in hot forging is very small, and the process of fineness of axial pure contraction is mainly in the closed mold cavity, which is regarded as the development of combining hot compaction and cold compaction technology of powder metallurgy.

The shrinkage of metal powder injection molding is related to the mold geometry and injection pressure, but the shrinkage is the same in the forming products. The above content dahong new material mainly introduces the metal powder injection molding casting method for you, hope to help you.