At present, mainly used in the metal vapor condensation purity magnesium Mg-04 as the raw material for producing high purity magnesium. In general, the powder yield in the large evaporative condensing unit reaches 200 g/h, and the chemical purity of the powder is 99.9-99.99%. Moreover, the produced powder has good physical and chemical properties and a wide particle size composition. The research results show that this method can realize industrial mass production of a certain scale, with good product quality and high economic benefits.
Specifically, the basic principle of the metal vapor condensation method for preparing magnesium powder is that the magnesium metal has a lower melting point and a higher vapor pressure, so that the solid magnesium is melted into a liquid state in the evaporation zone under a certain temperature and residual ammonia pressure. The generated vapor is continuously raised to a condensation zone in the same system, and condensed and deposited as a powder on the surface of the condensing crystallizer in the zone.
The high-purity magnesium powder production process firstly undergoes an evaporation process, that is, in the existing milling device, solid rod-shaped, block-shaped high-purity magnesium is charged into a large tank, and the solid magnesium is first melted into a liquid state to continuously generate steam. Thereafter, it is subjected to a condensing powdering process, in which the magnesium vapor is raised from the evaporation zone to the upper condensing zone of the tank, and finally condensed into a powder on the plane of the disk flat crystallizer which is finally in the center of the condensing zone.
In general, the emergence of high-purity magnesium powder production technology has filled the technical gap in China's magnesium powder deep processing industry, laying a good foundation for the rapid development of China's metal magnesium industry.
Injection molding is a widely used molding process for thermoplastics. Some thermosets and elastomers are injection molded when equipment is modified and operating parameters allow for the cross-linking of materials.
It's possible to create complex, intricate shapes with injection molding. It requires designing and fabricating a mold whose cavity has the same geometry as the original part. It must also allow for part removal. Part sizes range from 50 grams (2 ounces) to 25 kilograms (55 pounds). Heavier items made using injection molding include automobile bumpers and refrigerator doors.
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