First, the physical properties of the material being sieved It includes the particle size composition of the material itself, humidity, mud content and shape of the particles. When the fines content of the material is large, the productivity of the sieve is also large. When the humidity of the material is large, the screening efficiency generally decreases. However, the larger the mesh size is, the smaller the influence of water is. Therefore, for the wet material with large moisture content, in order to improve the screening process, it is generally possible to adopt a method of increasing the mesh hole or adopting wet screening. The material contains a large amount of mud (when the mud content is greater than 8%) should be wet screening, or pre-washed. Second, the nature of the screen surface and its structural parameters The vibrating screen makes the particles and the screen surface move vertically, so the screening efficiency is high and the production capacity is large. The relative movement of the particles and the screen surface is mainly a rod sieve, a plane vibrating screen, a cylinder sieve, etc. which are parallel movement, and the screening efficiency and productivity are low. For a given material, the productivity of the sieve and the efficiency of the screening are determined by the size of the mesh. The productivity depends on the width of the screen surface, and the productivity of the screen surface is high. The screening efficiency depends on the length of the screen surface, and the screening length is high. The general aspect ratio is 2. The larger the effective sieve area (i.e., the ratio of the mesh area to the entire screen area), the higher the productivity per unit area and the screening efficiency. The larger the mesh size, the greater the productivity of the unit sieve surface and the higher the screening efficiency. Third, the impact of production conditions When the load of the sieve is large, the screening efficiency is low. To a large extent, the peace rate of the sieve depends on the size of the mesh and the overall screening efficiency; the larger the mesh, the lower the efficiency of the screening, the higher the productivity. Feed uniformity is of great significance to the screening process. The inclination of the vibrating screen should be appropriate and generally determined by experimentation. Then there is the amplitude and vibration of the sieve, which is related to the structural properties of the sieve. Within a certain range, increasing the vibration can improve the screening index.
ABS plastic,full name acrylonitrile–butadiene–styrene copolymer,
Acrylnitrile butadiene Styrene copolymer has a good thermal and dimensional stability and high impact strength(also at low temperature).It is strong,shows a good scratch resistance and has a good dimensional stability .ABS Plastic can be used in temperatures ranging from -50'C to +70'C .it mainly have ABS SHEET,ESD ABS SHEET,FIREPROOF OF ABS SHEET,ABS+PC SHEET.
Classification:
ABS plastic according to impact strength can be divided into: ultra high impact type, high impact type, medium - resistant type and so on;
ABS plastic can be divided into: injection, extrusion, pressure delay, vacuum and blow molding.
ABS plastic can be divided into: general grade, heat resistance grade, plating grade, flame retardant grade, transparent grade, anti-static, extruding plate and pipe grade, etc.
Advantages:
1.Good mechanical strength, high impact strength
2.Resists scratching, Excellent abrasion resistance
3.Good electrical properties, moisture and creep resistance
3.High dimensional stability, good luster
4.Good chemical and stress cracking resistance to inorganic salt solutions, alkalis and many acids(strong oxidizing acids is a exception).
Disadvantages:
1.Endurance in water ,endurance in corrosion of inorganic salt. But not endurance in organic solvent.
2.ABS Plastic is easily to cracked by the effects of the organic solvent.
3.Poor weather resistance, easily to change color and become brittle because of the sunlight.
Application:
1. Electronics & electric appliances: antenna socket, coil former, wiring board, convertor, speaker,connector, and other parts;
2. Food industry parts;
3. Building model, model mockup;
4. Electronic industrial parts, freezer and refrigeration industry;
Notes:
1. ABS Plastic is strict requirements for flame retardant grade ABS to prevent the decomposition of flame retardants.
In the start of the power, the cartridge should be cleaned with general grade ABS plastic and then processed.
(point to stop for more than 20 minutes before the downtime), on the one hand must cut cylinder temperature below 100 ℃, on the other hand must be emptying the material inside the cylinder, and general level ABS cleaning cylinder rear can stop.
The purpose is to make flame retardant ABS not decomposed.
2. The use of reworked material for primary or secondary sex thousand net, without impurities, no decomposition of ABS plastic reworked material, can be used directly after crushing, also can mix with the new material, the mixing ratio is generally not more than 25% of the new material, so as not to affect performance.
For more than 5 times more than 5 times or adding the fresh material with colorant, generally not mixed with the new material, mainly to prevent the color difference.
ABS Plastic must be dried and processed in accordance with the regulations, whether it be separately regenerated or mixed with new materials.
Combustion characteristics
Specification: the diameter of the ABS Plastic rod can be produced from 2mm to 250mm. The conventional length is 1000mm, and the length is unlimited.
The thickness of ABS Plastic sheet material can be produced from 0.3mm to 1.9mm, the normal width is 600mm, the width cannot exceed 1200mm, the length is not limited.
The thickness of plate can be produced from 2mm to 180mm, the usual specification of 2-10mm is 1000mm* 2000mm, and the commonly used specification of 10-180mm is 600*1200mm. ABS Plastic can also be customized according to requirements, and the width cannot exceed 1200mm, and the length is not limited
Color: beige or white, can also be made black and color, and the color order is 500KG.
Modified varieties:ABS Plastic can be added to the fiberglass, copper powder and molybdenum disulphide to enhance the bar.
Add antistatic agent to the permanent antistatic electric bar, and the volume resistance value is between 6 to 9 power of 10.
Add flame retardant to flame retardant rod from UL 94V-0 to HB flame retardant grade. Other modification requirements are customized according to customer's actual use.
Product certification: ABS Plastic most environmental certification reports and safety reports for raw materials, such as SGS report, CTI report, UL report, MSDS safety information, etc.
ABS Plastic Sheet,Antistatic Styrene Plastic Sheet,Esd ABS Plastic Sheet,Fireproof ABS Plastic Sheet Dongguan Noegem Plastic Products Co.,Ltd , https://www.noegempLastic.com
Analysis of interference factors in vibrating screen production process
The technical and economic indicators of the vibrating screen screening process are screening efficiency and productivity. The former is the quality indicator and the latter is the quantity indicator. There is a relationship between them, and it is also related to many other factors that determine the outcome of screening. The factors affecting the screening process can be roughly divided into three categories: