Zinc powder ball mill: zinc powder processing and milling equipment technology and use

Zinc powder is dark gray powdery metal zinc, strong hiding power, has the effect of a good resistance to atmospheric corrosion and rust, commonly used to manufacture a strong reducing agent ﹑ rust, pigments and the like can be used. Zinc powder ball mill is the key equipment for zinc powder processing and milling. The anti-rust paints and pigments that have been made are used in the decoration of houses, and are more environmentally friendly.

1. Zinc powder processing and milling process

Zinc powder can be used to form a zinc slurry of scale structure by ball milling. The zinc powder and the ball milling medium are added into a closed roller ball mill, and a composite auxiliary agent is added to the roller ball mill, and a mixed gas of inert gas and air is introduced. The temperature inside the roller ball mill is maintained at 30-80 ° C, and then ball-milled for 5-20 h at a rotation speed of 30-100 r/min to obtain an average particle size of 5 to 25 μm, a bulk density of 0.7 to 1.2 g/L, and a pass of 45 μm. Ultrafine flake zinc powder with a sieving ratio of ≥98% by weight under the sieve. The zinc powder of the scale structure has a large hiding power, and the amount of zinc powder is less than that of the granular zinc powder when the coating is resistant.

Second, the powdered zinc powder helps green home construction

1. After the grinding, the zinc powder shields the interior decoration UV

In the coating industry, zinc powder has tinting strength and hiding power, and is a preservative and luminescent agent in coatings. In addition, the excellent ultraviolet shielding ability of nano zinc oxide makes it more prominent in the anti-aging of coatings. And has antibacterial, anti-enzyme, deodorant and other effects.

2, indoor humidity adjustment master

The high surface activity of the nano zinc oxide can improve the selectivity and catalytic efficiency of the catalyst, and can absorb moisture. When the humidity in the room rises, the ultrafine pores of the zinc powder can automatically absorb the moisture in the air and store it. If the moisture in the indoor air is reduced and the humidity is lowered, the zinc powder can release the moisture stored in the ultrafine pores. (

The Die Castings that are created in this process can vary greatly in size and weight, ranging from a couple ounces to 100 pounds. One common application of die cast parts are housings - thin-walled enclosures, often requiring many ribs and bosses on the interior. Metal housings for a variety of appliances and equipment are often die cast. Several automobile components are also manufactured using Die Casting, including pistons, cylinder heads, and engine blocks. Other common die cast parts include propellers, gears, bushings, pumps, and Valves.

Die casting is a manufacturing process that can produce geometrically complex metal parts through the use of reusable molds, called dies. The die casting process involves the use of a furnace, metal, die casting machine, and die. The metal, typically a non-ferrous alloy such as aluminum or zinc, is melted in the furnace and then injected into the dies in the die casting machine. There are two main types of die casting machines - hot chamber machines (used for alloys with low melting temperatures, such as zinc) and cold chamber machines (used for alloys with high melting temperatures, such as aluminum). The differences between these machines will be detailed in the sections on equipment and tooling. However, in both machines, after the molten metal is injected into the dies, it rapidly cools and solidifies into the final part, called the casting. The steps in this process are described in greater detail in the next section.

Die cast parts can vary greatly in size and therefore require these measures to cover a very large range. As a result, die casting machines are designed to each accommodate a small range of this larger spectrum of values. Sample specifications for several different hot chamber and cold chamber die casting machines are given below.

Type Clamp force (ton) Max. shot volume (oz.) Clamp stroke (in.) Min. mold thickness (in.) Platen size (in.)
Hot chamber 100 74 11.8 5.9 25 x 24
Hot chamber 200 116 15.8 9.8 29 x 29
Hot chamber 400 254 21.7 11.8 38 x 38
Cold chamber 100 35 11.8 5.9 23 x 23
Cold chamber 400 166 21.7 11.8 38 x 38
Cold chamber 800 395 30 15.8 55 x 55
Cold chamber 1600 1058 39.4 19.7 74 x 79
Cold chamber 2000 1517 51.2 25.6 83 x 83

The selection of a material for die casting is based upon several factors including the density, melting point, strength, corrosion resistance, and cost. The material may also affect the part design. For example, the use of zinc, which is a highly ductile metal, can allow for thinner walls and a better surface finish than many other alloys. The material not only determines the properties of the final casting, but also impacts the machine and tooling. Materials with low melting temperatures, such as zinc alloys, can be die cast in a hot chamber machine. However, materials with a higher melting temperature, such as aluminum and copper alloys, require the use of cold chamber machine. The melting temperature also affects the tooling, as a higher temperature will have a greater adverse effect on the life of the dies.

Materials Properties
Aluminum alloys ·Low density
       Â·Good corrosion resistance
       Â·High thermal and electrical conductivity
       Â·High dimensional stability
       Â·Relatively easy to cast
     Â·Requires use of a cold chamber machine
Copper alloys ·High strength and toughness
       Â·High corrosion and wear resistance
       Â·High dimensional stability
       Â·Highest cost
       Â·Low die life due to high melting temperature
     Â·Requires use of a cold chamber machine
Zinc alloys ·High density
       Â·High ductility
       Â·Good impact strength
       Â·Excellent surface smoothness allowing for painting or plating
       Â·Requires such coating due to susceptibility to corrosion
       Â·Easiest to cast
       Â·Can form very thin walls
       Â·Long die life due to low melting point
     Â·Use of a hot chamber machine
Advantages: ·Can produce large parts
       Â·Can form complex shapes
       Â·High strength parts
       Â·Very good surface finish and accuracy
       Â·High production rate
       Â·Low labor cost
     Â·Scrap can be recycled

Die Casting

Die Casting,Aluminum Die Casting,Die Casting Parts,Zinc Die Casting

Ningbo City Yinzhou Ruican Machinery Co.,Ltd , https://www.kstcasting.com

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