Metal injection molding is a technique of making metallic parts, which utilizes the entire process of powder metallurgy. Though the Medical Instrument Parts uses metals in powdered form, it is unlike the usual powder metal dispensation. Metal injection molding requires metallic powders to be ten to hundred times smaller in size, when compared with powder metal processes. The final product in case of metal injection molding has a higher density. The features and benefits of metal injection molding are similar to that of rubber and plastic molding, but the final product you get is much stronger. This technique is often used for producing surgical tools, components of firearms, hard disk drives for computers, electrical connectors and automotive locks.
Process of Metal Injection Molding
This procedure comprises of five steps, which include the mixing, the injection molding, the de-binding, the sintering as well as the part finishing. This procedure is gaining popularity each day.
Step one involves the mixing of metallic powders, which are acknowledged to be strong and possess inherent characteristics, like high-impact strength, wear resistance, hardness, machine ability and temperature characteristics. The binding agent is also added at this time. The goal of mixing different metallic powders is to derive a metallic compound which has all the positive characteristics of different metals, while eliminating their respective weaknesses.
As a result of the mixing of powders, we get what is known feedstock, that is injected to the desired molds, since it is done in the case of rubber or plastic moldings. The component that we get due to molding is called as green part.
The de-binding stage involves the immersion of the green part in water baths to eliminate the binder that has gone within the part matrix. During cross linking, the de-bounded green component is subjected to ultraviolet light, resulting to a thermo setting in the binding agents that have been used one of the metallic powders.
After the binding stage is finished, the component is heated to a temperature of above 2000 º Fahrenheit in a furnace. This procedure is referred to as sintering, and it also fuses the metallic parts to offer them a solid shape. At the end, the sintered components are shipped to the finishing stage for eliminating the imperfections and burrs. The component is now ready for dispatch.
Here are the primary advantages of choosing the whole process of metal injection molding:
High complexity of shapes
This is a great technology when we want components possessing a complex shape and superior final characteristics. Such characteristics include high density, strength, and outstanding magnetic permeability, resistance to corrosion plus jzsbox connectivity, and temperatures that can’t be accomplished using light metallic alloys and plastics. This procedure is ideally employed for producing microelectronic packaging, actuators and sensors for automotives, hardware, hand tools, heat dissipation devices for computers, oil well drilling tools, engine fuel parts and many more.