Introduction
Sintering is a process used to make materials from custom-made metal powders. In this process, the metal particles are heated and compressed, forming a dense metal object. The sintering process is widely used in metal production, metal working, automotive industry and electronics assembly. In the production process, two primary steps are involved: mixing and molding.
Mixing
The mixing step involves the mixing of the sintering material with a number of chemicals in order to form a homogenous mixture. The mixing progresses in two stages. In the first step, water is added as a bonding agent to produce a viscous paste that can be easily shaped and hardened. In the second stage, the remainder of the bulk powder mix is added, leading to a more homogenous mixture.
The mixing process is very critical and precise. Too little water can result in a poorly bonded and fragile finished product. Too much water can also result in collapse of the final product or incomplete combustion. The mixing also ensures that any elements that can interact with heat or flame during the sintering process are dispersed evenly throughout the mix.
Molding
Once the mixture is complete, it is then spread over the base plate of the molding system and filled with the remaining bulk powder mix. The molding is then completed by the use of a heated die, which is applied to the top plate of the system. As the heated die is applied, the powder is heated and compressed uniformly.
Once the molded pieces have cooled and solidified, they can be inspected and/or measured, ensuring compliance with established standards. If any problems are encountered, adjustments can be made to the powder mix, molding process, or both.
Conclusion
The process of sintering is a precise and delicate one. Understanding and correctly utilizing the two main steps, mixing and molding, can result in a consistent and high quality product. With the right approach, sintered metal products can be produced with a high degree of accuracy and a long-lasting finish.
