Powder compacting press machine for sale:

Q & A

Feature of powder compacting press machine.

Powder compacting hydraulic press structure is diverse, multi – tonnage optional.
Complete control functions: manual, semi-automatic, automatic. It can be controlled by PLC and touch screen.
The pressing process is rich: bidirectional pressing, floating pressing, unidirectional pressing
High safety factor: two hands operation, equipped with an emergency stop switch, the machine is equipped with safety grating protection.
An automatic pressure supplement device is adopted to ensure the quality stability of products.
Dry pressing molding, high production efficiency, less labor, low rejection rate, short production cycle. The products produced have high density and high intensity and are suitable for mass industrial production.

What is powder compacting press machine?

Powder compacting machine press is a machine that can press powder materials of different materials (powder can be pure metal or alloy, non-metal, metal and non-metal compound, etc.) into the required shape, size, and density of blank block by applying certain pressure under the coordination of the mold.
The common machine structure of powder compacting hydraulic press is three-beam four-column hydraulic press, vertical and horizontal hydraulic press, two-beam four-column hydraulic press, four-beam four-column hydraulic press, etc. it has independent hydraulic and electrical systems. The machine is equipped with an automatic feeding device, a variety of pressing methods. it is suitable for pressing metal powder, ceramic powder, refractory material, alloy powder, rare earth powder, etc.

What is powder compaction?

Powder compacting is a compression molding process that uses a hydraulic press machine to form complex shapes from metallic, ceramic, composite, PTFE, and other powder compounds.
The powder or powder mixture is loaded into the steel pressing die, and the powder is pressurized by the die punching. After the pressure is relieved, the pressing billet comes out of the die, and the powder pressing process is completed. Suppression methods include:
1. single-pressing
2. double-pressing
3. Floating suppression
4. Pull down pressing
5. Friction pressing

What is powder processing?

Powder processes convert engineering materials in a dry powdery state to solid shapes. Powder processing includes four steps of powder preparation and powder pressing, sintering, post-processing. There are mainly two methods for powder preparation: mechanical method and physicochemical method. The powder processes involve powders in the dry state with little or no liquid added. These powders can be engineered so that they can be poured into molds or dies and Under the pressure, The displacement and deformation of particles occur under pressure. The billet with precise geometry, shape, hardness can be produced.

Why is there density variation in the compaction of powders?

After powder compression, displacement and deformation occur. During the pressing process, the relative density of the billet changes regularly with the increase of pressure. Generally, there are three stages:
1. The powder particles move and fill the pores. At this stage, with the increase of pressure, the density of green compact will increase rapidly, so this stage is called the sliding stage.
2. When the pressure exceeds the value in the sliding stage and continues to increase, the density of the billet is almost unchanged. This is because the density of the billet has reached a fixed value in the sliding stage, and the powder has compression resistance.
3. When the pressure continues to increase beyond the second stage to a certain extent, the relative density of the billet continues to increase, because when the forming pressure exceeds the critical stress of the powder, the powder particles begin to deform, so the density of the billet also increases.
Therefore, the displacement and deformation of powder particles are the factors that cause the change of powder pressing density.