The blade of the pulverizer is the most important part of the pulverizer. If there is a problem with the blade, the pulverizer will also have problems, and the products of the pulverizer will also be affected. Therefore, in the process of normal production and work, we should pay attention to the state of the blade and avoid problems with the blade. This article mainly helps you understand the pulverizer blade.
Application of pulverizer blade
The pulverizer blade is also called the plastic pulverizer blade. Mainly used for pulverization in plastic and rubber industries, the blades of the pulverizer require very precise dimensions to ensure good assembly quality with the machine. It needs to meet the different needs of users and pulverize different materials, so the entire pulverizer blade needs to be well heat treated to ensure that the blade will not deform when it is working.
Classification and material of pulverizer blades
The pulverizer blades are divided into plastic pulverizer blades, strong pulverizer blades and granulator blades.
Plastic pulverizer blades:
- Also called a plastic blade, it is a mechanical blade installed on a plastic crusher and used for plastic crushing;
- The pulverizer blade adopts the actual flat knife, which is divided into movable knife and fixed knife. The purpose of pulverizing plastic is achieved by the high-speed rotation of the pulverizing motor knife and the shearing of the fixed knife;
- Plastic pulverizer blades are suitable for smashing various plastics and plastic recycling. Plastic pulverizer blades are divided into two types: full steel knives and steel inserts;
- The technical requirements of plastic pulverizer blades are relatively high, and technical requirements such as impact resistance, wear resistance and high temperature resistance are required.
Powerful Crusher Blades:
- The powerful crusher blade is a mechanical blade installed on the powerful crusher and used for large-scale crushing;
- The blade of the powerful crusher is composed of a fixed knife, a claw knife and a spiral hob. The spiral hob rotates the blade at a high speed to crush materials, and has the characteristics of high production efficiency and uniform particles;
- The powerful crusher blade is also suitable for crushing large materials such as sheets, pipes, plates and packaging materials;
- The granulator blade, also known as the granulator blade, is a blade installed on the plastic granulator and used for granulating plastic particles;
- The granulating blade is composed of a fixed knife and a granulating hob. Generally, a granulating hob is equipped with a fixed knife, and it is also divided into two types: all-steel hob and steel-inlaid hob;
- The granulator blade is continuously rolled by the hob, shearing and extruding the plastic to achieve the purpose of granulation. The plastic particles produced by the granulator blade are uniform, and it is a relatively popular blade in the industry.
There are many kinds of materials for pulverizer blades, and the processing technology of different materials is also different. The main raw materials are T10, front steel and D2.
Precautions for the purchase of pulverizer blades
Generally, the speed of the main shaft of the crusher is a fixed number, which is usually not adjusted. Generally, it can reach above 6000rpm. Because of high-speed operation, it has a lot of influence on the rolling bearing and the blade.
The feeding rate will have a certain impact on the particle size distribution of crushing. For materials that are easy to crush, or raw materials whose operation is not particularly strict, the feeding rate may not have a particularly large impact, but for those materials that are difficult to crush, it is necessary to strictly control the input. If the feed rate is too fast, it will have a great impact on the pulverizer blade.
Sometimes there may be defects in the design of the crusher blade, because the crusher will also generate adsorption force after opening, even if the feeding rate is relatively slow, the machine can quickly suck the raw materials into the crushing cavity immediately, resulting in a decrease in the actual crushing effect. , at this time, it is necessary to manually operate the feeding rate to improve the crushing effect.
The mesh screen is to filter out the raw materials whose particle size has reached the required size, and leave the coarser raw materials to be broken again until the size of the broken particles meets the requirements. Therefore, according to the function of the screen, it can be known that the gap of the screen also affects the blade of the crusher.
What are the factors that affect the quality of the pulverizer blade
There are 3 types of pulverizer blade structures : integral, welded and mechanically clamped. The integral structure is to make the cutting blade on the cutter body; the welding structure is to weld the blade to the steel cutter body; there are two types of mechanical clamping structures, one is to clamp the blade on the cutter body, and the other is to weld the blade to the steel cutter body. A good cutter head is clamped on the cutter body. Carbide inserts are generally made of welded structures or mechanical clamping structures.
The geometric parameters of the pulverizer blade have a great influence on the cutting efficiency and processing quality. Increasing the rake angle can reduce the plastic deformation when the rake face squeezes the cutting layer, reduce the frictional resistance during cutting, and reduce the heat during cutting, but it will reduce the strength of the rake angle.
The custom coating of pulverizer blades has the advantages of high hardness, good wear resistance and low friction coefficient. The material, geometric angle, coating, reinforcement and processing conditions of the blade play different roles in the service life of the blade.
The material of the blade is the main factor for the cutting performance of the blade, which has a great influence on the processing efficiency, processing quality, processing cost and blade durability. The harder the customized blade material, the better the wear resistance, the higher the hardness, the lower the impact toughness, and the more brittle the material is.
If the blade of the grinder is not installed tightly, you can tighten the adjusting screw and fixing screw. If the blade is damaged, it must be disassembled for inspection and overhaul. If the cylinder pressure is insufficient, it must be adjusted to the normal pressure. If there is foreign matter between the blades, the blade can be removed. , and tighten after cleaning.
How to Install a pulverizer Blade
It is necessary to cut off the power supply of the pulverizer, confirm that the motor stops, and clean up the material residues at the feeding port. Use a wrench to turn off the captive screws outside the chassis, configure a hydraulic unpacking model, and turn on the starter. Pay attention to safety here. Make sure the machine is stable and do not use excessive force.
Clean up the materials in the crushing chamber of the crusher, use a wrench to turn off the fastening screw on the blade, and remove the blade. Be careful with the blade and pay attention to safety. Stack the new blades in the screw holes, keep the gap between the movable blade and the fixed blade at 0.15 to 0.24 mm, tighten the screws, and after all blades are installed, turn the rotor to check the claws.
Check whether the rotor is working normally, whether there is any collision in the casing, and whether the rotation direction of the rotor is the same as the normal working direction. After adding lubricating oil, after confirming that everything is normal, close the case cover, tighten the screws, and finally turn on the power to check whether the grinder is running normally and whether there is any abnormal noise.
Due to the wear and tear of the pulverizer blade
After the blade of the pulverizer is worn to a certain range, stop using it, otherwise it will affect the working performance and production efficiency of the blade. And at this time, the wear limit of the pulverizer blade is called the blunt standard of the pulverizer blade. When the usage of the blade of the pulverizer blade exceeds the blunt standard, and continue to use, the pulverizer blade will be faster. The speed is worn away, which is the rapid wear phase.
The wear form of the pulverizer blade can be divided into two types: wear and breakage. One is the constant wear of the blade, and the other is plastic breakage and brittle breakage.
You can solve the problem from the source, try not to use inferior blades, and choose better blades. It must be resistant to high temperature, because the blades must rotate at high speed, especially the crushing blades. When these blades rotate, friction will generate heat, so they must be resistant to high temperature; they must also be able to withstand large impact forces, which is also an important requirement for crusher blades; At the same time, lubricate the blade, which can reduce wear and prevent the blade from rusting.
The blades of the pulverizer are generally made of steel materials. Whether it is metal or other substances, there will always be wear and tear in the continuous high temperature and friction, and the blades work at frequent high temperatures, and wear and tear cannot be avoided, so avoid Blades work at high temperatures.
Routine maintenance of pulverizer blades
What are the common problems of pulverizer blades:
The cutter head is not damaged and dull: If the smoothness of the cutter head of the pulverizer blade is not good, there may be some impurities stuck to the cutter head, which may cause the cutter head to become dull. If such a situation occurs, it is necessary to remove the stains on the cutter head in time to make the cutter head smooth.
The cutter head is dull due to slight wear: if the damage of the pulverizer blade is slight wear, remove the cutter head, then clean it, after cleaning, artificially grind and polish it, and then reinstall the cutter head.
The cutter head is partially ground and dull: Generally speaking, this is because the working intensity of the crusher is too high, or the hardness of the crushed material is too high, causing serious damage to the cutter head. The size of the blade will do.
How to maintain the pulverizer blade:
The pulverizer blade is an indispensable and important component of the pulverizer, which is directly related to the working efficiency of the machine. If the strength or sharpness of the blade head is not enough, it will directly affect the quality of the product. Therefore, when using the machine, be careful not to put metal objects into the machine when feeding to prevent damage to the cutter head.
After each use of the pulverizer, the machine should be cleaned in time to check whether the parts are loose to increase the service life of the machine. At the same time, when checking the machinery and equipment, pay attention to whether the machine has oil leakage and whether the screws are loose.
The blades of the pulverizer are vulnerable parts that should be paid special attention in daily maintenance, such as cutter heads, screens, rolling bearings, and conveyor belts. It is also necessary to pay attention to it frequently, and if there is damage or stains, it should also be cleaned in time.
How to choose a pulverizer blade
If the material to be pulverized is a bit hard and difficult to pulverize, use a blade made of tungsten steel. This kind of blade has a very good effect on hard materials; if it is a material similar to silica gel, it is To choose a blade with good wear resistance, this type of blade has a very good effect on softer materials.
General blades are only suitable for smashing some common materials. If you encounter some erosive materials or materials with chemical fibers, you need some special blades. Otherwise, if you choose ordinary blades, you will be affected. The blade produces huge damage.
This is the introduction of the pulverizer blade in this article. Do you understand it? If you still have questions, it doesn’t matter. You can leave a message in the comment area, and we will answer your questions one by one. In the meantime, you are welcome to continue reading other articles on our website.