Metal injection molding is a technique of making metallic parts, which utilizes the entire process of powder metallurgy. Although the Metal Injection Molding 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, compared to powder metal processes. The final product in case of metal injection molding has a higher density. The benefits and features of metal injection molding are similar to that of rubber and plastic molding, but the final product you get is much stronger. This procedure is often utilized 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, that include the mixing, the injection molding, the de-binding, the sintering as well as the part finishing. This method is becoming more popular every day.
Step one requires the mixing of metallic powders, which are recognized to be strong and have inherent characteristics, like high-impact strength, wear resistance, hardness, machine ability and temperature characteristics. The binding agent is additionally added at this stage. The objective of mixing different metallic powders is to derive a metallic compound which includes all the positive characteristics of various metals, while eliminating their respective weaknesses.
Because of the mixing of powders, we obtain what is known feedstock, that is injected in to the desired molds, because it is done when it comes to rubber or plastic moldings. The component that we receive due to molding is referred to as as green part.
The de-binding stage necessitates the immersion in the green part in water baths to get rid of the binder which has gone within the part matrix. During cross linking, the de-bounded green component is subjected to ultraviolet light, resulting to some thermo setting of the binding agents that have been used among the metallic powders.
Right after the binding stage is over, the component is heated to some temperature of above 2000 º Fahrenheit in a furnace. This method is known as sintering, and it fuses the metallic parts to offer them an excellent shape. At the end, the sintered components are sent to the finishing stage for eliminating the imperfections and burrs. The component has become ready for dispatch.
Listed below are the primary benefits of using the entire process of metal injection molding:
High complexity of shapes
This is a great technology whenever we want components having a complex shape and superior final characteristics. Such characteristics include high density, strength, and outstanding magnetic permeability, effectiveness against corrosion plus jzsbox connectivity, and high temperatures that can’t be achieved using light metallic alloys and plastics. This method 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 others.