Particle Size Distribution Detection and Temperature Control of MIM for Metal Injection Molding

Particle Size Distribution Detection and Temperature Control of MIM for Metal Injection Molding

How to detect particle size distribution and control temperature of MIM in metal injection molding? Metal injection molding is the mainstream metal precision parts molding and manufacturing technology at present. It can be near net molding, one-time molding, and the material utilization rate is as high as 95%. It can also be mass produced, greatly reducing the production cost, and has more advantages than traditional molding and processing technology. How can we do particle size distribution detection and temperature control for MIM of metal injection molding?

1、 How to detect the particle size distribution of MIM in metal injection molding?

The particle size distribution of MIM injection molding powder is usually measured by laser particle size analyzer. The main reason is that the laser has good monochromaticity and strong directivity. When the beam encounters particle obstruction, part of the light will be scattered. The propagation direction of the scattered light will form an angle with the propagation direction of the main beam. The scattering angle is related to the particle size. The larger the particle is, the smaller the angle of the scattered light is, and the smaller the particle is. The greater the angle of scattering light, the greater the intensity of scattering light. In this way, the particle size distribution of powder can be obtained by measuring the intensity of scattering light at different angles.

powder metallurgy

2、 Temperature control of MIM injection molding?

1. Barrel temperature control

The MIM process of injection molding needs to control the temperature of the charging barrel, which mainly affects the plasticity and activity of the metal. The temperature in the first stage mainly affects the activity and cooling of the metal. Each metal has a different activity temperature. For the same metal, its activity temperature and synthesis temperature are different due to different sources or grades. This is because the average molecular weight and molecular weight distribution are different. The plasticizing process of metal in different types of injection molding machines is also different, Therefore, the selected barrel temperature is different.

2. Nozzle temperature control

The nozzle temperature is usually slightly lower than the Zui high temperature of the barrel, which is to prevent the melt from "salivating" in the straight through nozzle. The nozzle temperature should not be too low, otherwise the early condensation of the melt will form and the nozzle will be blocked, so the performance of metal parts will be greatly affected, thus affecting the quality of powder metallurgy structural parts.

The above are two kinds of temperature control of powder metallurgy process metal injection molding MIM particle size distribution detection and powder metallurgy process metal injection molding MIM technology. Through the above introduction, we can have more knowledge and understanding of metal injection molding MIM technology. I believe you now know how to do particle size distribution detection and temperature control for MIM of metal injection molding?