Metal injection molding is a technique of making metallic parts, which makes use of the entire process of powder metallurgy. Though the Stainless Steel Castings 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, in comparison 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 used for producing surgical tools, components of firearms, hard disk drives for computers, electrical connectors and automotive locks.
Procedure of Metal Injection Molding
This procedure comprises of five steps, which include the mixing, the injection molding, the de-binding, the sintering and also the part finishing. This procedure is gaining popularity by the day.
The first step requires the mixing of metallic powders, which are known to be strong and have inherent characteristics, like high impact strength, wear resistance, hardness, machine ability and temperature characteristics. The binding agent can also be added at this time. The purpose of mixing different metallic powders is to derive a metallic compound which includes all of the positive characteristics of numerous metals, while eliminating their respective weaknesses.
Due to the mixing of powders, we obtain what is known as feedstock, that is injected into the desired molds, because it is done when it comes to rubber or plastic moldings. The factor that we receive as a result of molding is known as as green part.
The de-binding stage necessitates the immersion in the green part in water baths to eliminate the binder which includes gone within the part matrix. During cross linking, the de-bounded green component is subjected to ultraviolet light, resulting to some thermo setting from the binding agents which were used among the metallic powders.
Right after the binding stage is finished, the component is heated to some temperature of above 2000 º Fahrenheit in a furnace. This process is known as sintering, and it also fuses the metallic parts to provide them a solid shape. At the end, the sintered components are delivered to the finishing stage for eliminating the imperfections and burrs. The component is currently ready for dispatch.
Listed here are the primary benefits of using the entire process of metal injection molding:
High complexity of shapes
This is a great technology when we want components using a complex shape and superior final characteristics. Such characteristics include high density, strength, and outstanding magnetic permeability, effectiveness against corrosion plus jzsbox connectivity, and temperatures that can’t be achieved 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 others.