SURGICAL INSTRUMENTS

The requirements for MIM materials used in the medical field are relatively high. The unit price of medical MIM injection molded parts is a little more expensive than that of MIM parts used in industry. The raw materials are not allowed to contain harmful substances. Some elements cannot exceed the requirements of the relevant departments of medical devices. The production environment should meet the health standards. Therefore, many MIM factories will build purification workshops to produce medical devices.

Surgical tools are required to have high strength, low blood pollution and be able to achieve aggressive disinfection procedures. The design flexibility of MIM technology can meet the application of most surgical tools. At the same time, it also has the advantages of technology. It can manufacture various metal products at low cost. It is gradually replacing traditional production technology as the main manufacturing method.

Sintering after forming with MIM technology can reach a very high tolerance level, and does not require a large number of subsequent treatment processes to avoid damaging the linear and geometric shape of the claw. It is difficult to produce this kind of stainless steel claw with complex shape by casting or machining, which requires a long production cycle and high cost. Using MIM technology to manufacture it can save 60% of the cost.

Disposable surgical tools need to develop a process that can be mass produced at low cost. Smith Metal Products Co., Ltd. uses MIM technology to produce a shaft assembly [8], which is used in a new type of disposable surgical instruments. The cost is only 1/4 to 1/5 of that of a Swiss CNC machine tool, the density is 7.5g/cm3, the ultimate tensile strength reaches 1190MPa, the yield strength 1090MPa, the elongation is 6.0%, and the upper limit hardness is 33HRC.