What about the key points for selecting flour mesh?...

Flour Mill Mesh, also known as sieve sifter, is an important auxiliary screening equipment in flour mechanism powder. Although the cost of flour mill mesh is not high, it is indeed indispensable equipment in milling. Choosing the right screen for milling effect And the rate of flour extraction has a crucial impact. Therefore, to ensure the quality of the flour and the rate of flour extraction, the flour mill mesh must be properly selected and used. The method for selecting and using the flour mill mesh is as follows.

Silk screen: It is made of a plurality of natural silk woven into silk, and then woven. It is characterized by good elasticity, not easy to relax, the hole size is not easy to be deformed, has good hygroscopicity and moisture release, and is less prone to static electricity. However, it is not wear-resistant and easy to fluff.

Nylon (nylon) mesh: woven from polyamide monofilament fiber. Wear-resistant, long service life, high strength, good overall effect.

Polyester screen: woven from polyester fiber monofilament. High strength, not easy to deform, but slightly less wear resistance and antistatic effect than nylon mesh.

In the past, most domestic flour mills chose silk screens, which is the use of imported nylon screens, the digestion and absorption of domestic screens, especially the extensive application of bandage machines, ensuring nylon screens for more than a decade. The tension of the time makes the nylon screen popularized and applied. But in some factories, it is still accustomed to use silk screens. As for the polyester screen, it is used less by the flour mill except for the use on the sieve of the powder cleaner. The physical properties of the three materials are shown in Table 1.

Screen classification and selection criteria:

Selection of flour mill mesh :

Screen opening size: As can be seen from the above, due to the existence of various representation methods, it is selected according to the actual size. The degree of wear resistance: largely determines the service life of the screen. Among all the materials currently used, the wear resistance of nylon is good, the polyester is only 70%, the silk is poor, for the screen of the same material, The thicker the wire diameter, the better the wear resistance. Elongation: From the value of Table 1, the silkworm mesh is obviously lower than polyester and nylon mesh, but now, most polyester and nylon meshes are heat-set after being braided to prevent mesh deformation as much as possible. Therefore, it is basically close to the use effect of silkworm mesh. Antistatic property: All flour screens are required to be antistatic. This is because the contact and friction between fiber and fiber, fiber and material will cause the transfer of charge between the fiber surface, resulting in static phenomenon, and because of the grain size of the flour. Fine, easy to be attracted by the charge caused by screening difficulties, and even paste.

Flour mill mesh use

Screen stretch:

Classification of stretched styles and corresponding equipment: According to the actual use of the flour mill, it can be divided into the manual method, the self-tensioning method, the mechanical stretching method and the pneumatic stretching method.

Screen fixing

Commonly used screen fixing methods include manual nailing, gluing and pneumatic nailing.

The size, material, installation or replacement of the flour machine screen are indispensable considerations when selecting the screen. The suitable screen can not only improve the quality of the flour, but also ensure the flour extraction rate of the flour machine. The importance of use.