Metal Injection Molding Process Pdf

Pim utilizes the plastics production technology of injection mold.

Metal injection molding process pdf.

Metal injection molding design examples mim design eliminated a 7 piece. Nevertheless some machine hardware changes are usually required to process a specific feedstock based on their compressibility and viscosity. In addition to cost considerations a strategic view needs to be taken of how these gases are supplied or generated what infrastructure is required to store them and what. Control of the molding process is vital for maintaining tight tolerances in subsequent steps.

Metal injection molding mim is a process for forming net shape or near net shape components at a reduced manufacturing cost as compared to machining and at a higher precision level than other forming technologies such as investment casting. 2 shows the sequence of processing steps. Unlike standard powder metallurgy which can achieve only 80 90 of theoretical density mim results in 95 100. Heaney in handbook of metal injection molding 2012.

Consistency of powder size distribution consistency of powder loading mlp d consistency of powder loading metal powder metal powder 60 volume polymer. Metal injection moulding and industrial scale sinter based additive manufacturing facilities require a secure supply of industrial gases for use as sintering atmospheres. In the 1970s this process was developed to allow the processing of metal powders by raymond wiech in the us widely considered the inventor of the metal injection molding process. The metal injection molding process combines the design flexibility of plastic injection molding with the strength and integrity of wrought metals to offer cost effective solutions for highly complex part geometries.

The flow diagram in fig. The metal injection molding process is usually called by its short acronym mim as it will do in this work. Together they act as binders. Mim is a subcategory of the powder injection molding pim man ufacturing technique.

Smith metal products design guide pdf download. The injection molding process is mainly identica l to conventional plastic injection molding. Feedstock veryfinemetalpowdersusually 15microns aremixedwithaprimaryparaffinmaterialanda secondary thermoplastic polymer.