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Metal Powder Injection Molding: From Theory to Practice

Metal Powder Injection Molding: From Theory to Practice

Metal powder injection molding is a manufacturing technology that uses powder metallurgy to produce high-precision, highly polished, complex and small-sized metal parts.  Metal powder injection molding  technology has advantages such as small volume, light weight, and stable quality, and can replace traditional metal casting technology to produce parts with higher quality and lower processing costs.


In theory, the principle of metal powder injection molding


The principle of  metal powder injection molding  is to combine metal powder with plastic, and then inject it into the mold. The hot thermoplastic plastic combined with metal powder at high temperature and high pressure to form the required shape and size of the parts.


Metal powder injection molding technology has the advantages of low manufacturing cost, high accuracy, high surface smoothness, complex structure and small size, and can replace traditional metal casting technology to produce parts with higher quality and lower processing costs.


The process of metal powder injection molding


Powder mixing


First, mix the metal powder and plastic together, and use a mixer to mix them to make the metal powder and plastic finer in particle size for better combination.


Powder injection


Inject the mixed metal powder and plastic into the mold in a high-temperature and high-pressure manner to melt it into the shape and size of the mold.


Polishing


After molding in the mold, polish the  metal powder injection molding  parts taken out of the mold to ensure a smooth and burr-free surface.


Recovery


Finally, take out the polished parts from the mold, and recover the remaining metal powder and plastic mixture in the mold for use next time.


Applications of metal powder injection molding


Electronics industry


Metal powder injection molding  technology can manufacture fine, complex, high-precision, and highly polished parts, so it is widely used in the electronics industry. For example, it can be used to manufacture miniature parts such as screws, connectors, circuit boards, and circuit boards in electronic equipment.


Automotive industry


In the automotive industry, metal powder injection molding technology can be used to manufacture high-quality, low-cost parts for automotive engines, transmissions, and chassis to improve vehicle performance.


Aerospace industry


In the aerospace industry, due to the small size, high accuracy, and high surface smoothness of the parts,  metal powder injection molding  technology can be used to manufacture miniature parts for aircraft and rockets to improve their performance and reliability.


Metal powder injection molding technology is a manufacturing technology that can use powder metallurgy to produce high-precision, highly polished, complex, and small-sized metal parts. It has advantages such as low manufacturing cost, high accuracy, high surface smoothness, complex structure and small size, and has been widely used in the electronics, automotive, and aerospace industries.

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