Test sieve

The test sieve is also called standard sieve, test sieve, standard test sieve, particle size analysis sieve, particle size calibration sieve, particle size inspection sieve, and sample sieve. It is used to classify the particle size composition of various powder materials.

In various industries in the country, there are sieves for inspection, such as pharmacopoeia sieves, sand and gravel sieves, cement sieves, etc. The mesh openings are in accordance with industry requirements and the mesh opening tolerances comply with GB/T6003.1-1997, GB/T6003.2-1997, and GB/T6003.3-1997.

Standard sieve material types: divided into three types, each with different characteristics and application ranges: wire mesh (the most widely used mesh has only square holes from 2.36 mm to 0.02 mm), perforated plate mesh (mainly used for large meshes, with round holes and square holes ranging from 0.2 to several hundred mm), electroformed mesh (mainly used in high-precision occasions, so that each mesh is within the average error range). As a professional manufacturer of standard sieves, it is necessary to have a tool microscope and a projector. The tool microscope is used to check the accuracy of the mesh, using the arithmetic mean method (the latest method is the normal distribution method).
1. Wire mesh has the lowest cost and good flexibility, but the lowest relative accuracy (large mesh is allowed), and the mesh may be deformed (the mesh accuracy can be controlled by expanding and shrinking the holes, and the holes can be fixed by electrochemical methods). Generally, manufacturers with high-precision mesh production capabilities are required to ensure mass production (screens that meet the GB/T6003.1-1997 standard need to be selected from a large number of high-precision screens). The most widely used industry is the diamond industry, especially export manufacturers require a standard negative difference, because the difference between foreign and Chinese is half a size, and the basic particles account for more than 90%, such as 230, preferably between 75 microns and 63 microns.
2. Perforated plate screen, the mesh precision is uniform and not easy to deform, mainly used for large particle detection, because there are two types of round holes and square holes, so such as round hole asphalt collection screen, round hole coal sample screen, etc. are used.
3. The electroforming screen is manufactured by electrochemical method, with the highest precision. Theoretically, the precision can reach one micron, but due to the different process molds of manufacturers, there will be great differences. At the same time, the flexibility is not good, it is easy to crack, and the cost is too high, so it is not suitable for production.

The screen mesh of the test sieve includes two types: metal wire woven mesh, the mesh size requirement is GB6003.1-1997, and punching plate, the mesh size requirement is GB6003.2-1997. It is installed in a slapping standard sieve machine or a standard sieve machine to classify the particle size composition of various powder materials.
It is widely used in the precise standard screening and particle size detection of granular materials in industries such as superhard materials (diamond, cubic boron nitride), abrasives, geochemicals, metallurgy, pharmacopoeia, chemical building materials, etc.
The screen mesh used in the stainless steel high-grade standard sieve is strictly produced in accordance with the GB6003.1-1997 standard, and the mesh/wire diameter marking method is adopted (because the mesh number is a relative unit, the mesh number refers to the number of holes and wires on a length of 1 inch 25.4 mm. The same mesh number, different wire diameters, and different holes).
Screen surface: It is composed of metal and non-metallic materials such as brass, phosphor bronze, stainless steel wire mesh, round hole iron plate, and nylon mesh.
Screen frame: Made of brass, stainless steel, cold-rolled iron (chrome or zinc plated), plastic frame screen and other materials.
The screen frame is flat, smooth and has good interchangeability of the screen set assembly.
Screening tools: scientific design, exquisite structure, flat screen surface, high tension, high aperture, regular screen frame shape, complete specifications
1. The standard screen frame is made of SUS304 (0Cr18ni9) stainless steel stretched and polished, with a wall thickness of 0.6 mm, a surface that can be seen through, the overall molding is sturdy and durable, and has no magnetism. The standard screen mesh and the standard screen frame are fixed by soldering and will not loosen. Able to withstand high temperatures below 300 degrees. The standard screen frame is made of SUS304 stainless steel stretched and polished, with a thick wall, a surface that can be seen through, sturdy and durable, and has no magnetism. The standard screen mesh and the screen frame are fixed by soldering and will not loosen.
2. The mesh is accurate. The mesh of the same specification produced at different times is consistent because it is marked according to the mesh. The standard mesh size of the wire weaving standard screen is 0.02 mm (20 microns) for square holes and 0.005 mm (5 microns) for triangular holes. The standard screen mesh is woven according to the B6003.1-1997 standard. It meets the international standard ISO3310-1:1990 R20/3, R20, R40/3 series. The standard screen mesh is made of brass H80 and stainless steel SUS304. It can be electroplated and chemically processed to make the screen surface smooth and wear-resistant. At the same time, the warp and weft nodes are fixed together, and the mesh will not deform after long-term use. The mesh
size of the imported Taylor screen is similar to GB6003.1-1997, such as the mesh size of China No. 140 is 106 microns, the mesh size of the American mesh No. 140# Taylor mesh No. 150# is 105 microns, and can be made according to user requirements. You can choose a 105 micron screen to match the corresponding Taylor screen for the user, which can meet the requirements of both mesh requirements and appearance.
3. Perforated plate standard screen, processed according to GB6003.2-1997 standard. In line with international standards ISO3310-2:1990 R20/3, R20, R40/3 series
select different layer types of vibrating screens according to the specific needs of the screening material. One layer of screen is mostly used to screen out impurities and overweight filtration. The one-layer vibrating screen can also separate two complete particle sizes.