Pulp equipment- China Manufacturers Suppliers Factory

Papermaking felts require good dehydration, smoothness, dirt resistance, abrasion resistance, dimensional stability, chemical resistance, antimicrobial resistance, heat resistance and hydrolysis resistance.

The processing method of papermaking felt is to first use synthetic fiber to make a thick and thin base cloth, and then lay a mixed fiber net of synthetic fiber and a small amount of wool, which is formed by needle punching, chemical treatment, resin finishing and heat setting.

Papermaking blankets are divided into two types: woven and knitted. The woven paper blanket is made of wool and nylon staple fiber blended yarn with a blending ratio of about 75:25, which is made by weaving, shrinking, raising, drying and setting. The manufacturing method of needle-punched papermaking felt is to first comb 50% wool and 50% nylon staple fiber or 100% nylon staple fiber into a fiber web, overlap multiple layers, and then use a barbed steel needle to stab the fiber web to the pre-woven fabric. On the annular base cloth, it can achieve a certain degree of tightness and flatness. Acupuncture methods include single-sided acupuncture and double-sided acupuncture. Needle-punched felt has the characteristics of good water drainage, wear resistance, high strength and long service life.

How to correctly select the anilox roller, how to maintain the anilox roller, etc. These issues are more critical for users. Anilox roller is an important part of flexo printing machine, and it has a lot to do with flexo printing plate and ink. When choosing anilox roller, the following factors should be considered.

1. Ink type. The inks used in flexographic printing usually include water-based inks, solvent-based inks, UV inks and varnishes. Different ink types have great differences in the ink transfer of the anilox roller. Even if the ink of the same nature, its quality and adhesion viscosity are different, there will be differences when transferring ink.

2. Printing plate materials. At present, flexographic printing mostly uses resin printing plates, but some still use rubber printing plates. The plates of these two materials have different adsorption properties to ink. In resin printing plates, there are also inked plates and non-ink plates. It will have a great impact on the ink transfer quality of the anilox roller.

3. Plate type. Solid full plate (glazing), low screen line and high screen line layer printing all have very strict requirements on the screen line and ink transfer amount of the anilox roller. A slight error will lead to the decline of printing quality or printing failure.

4. Printing substrate. Paper, plastic film, and corrugated cardboard have differences and effects on ink adsorption and color. The adsorption of plastic film to ink is poor, and the ink transfer amount of the anilox roller is required to be lower, and the ink transfer amount of the paper is required to be higher.

5. Scraping method. The ink scraping method also has a certain influence on the ink transfer effect of the anilox roller. When making anilox rollers, tell the manufacturer the specific squeegee method: rubber roller squeegee, forward or reverse squeegee, closed squeegee system.

During the use of the anilox roller, its maintenance is very important. In the past, many people did not pay attention to the maintenance of anilox rollers. Or improper maintenance. In particular, there is no correct understanding of the cleaning of the anilox roll, and many quality problems occur. After several years of development, everyone has gradually realized the importance of maintenance and cleaning of anilox rollers to improve printing quality, especially for printing plants engaged in narrow and wide flexo printing. The maintenance of the anilox roller includes the following parts:

1. When replacing the anilox roller, protect the roller surface of the anilox roller, and use a leather cover for storage.

2. The replaced anilox roller should be cleaned in time.

3. Place a magnetic filter in the ink tank to prevent metal impurities from scratching the anilox roller.

4. Select high-quality scraper and blade type, it is recommended to use plastic scraper, which can better protect the anilox roller.

5. Use a mesh microscope to detect the mesh. If wear and blockage are found, measures should be taken in time.

         No matter what you do, if you know what to do before doing something, you will naturally get twice the result with half the effort. Because you know enough, you can easily solve all kinds of problems when you encounter them. The same is true for the use of paper machines. After the paper machine is sufficiently understood, it can easily cope with the problems that may be encountered when using it. Today, Shandong Easttai Paper Machine Equipment Factory will explain the role of the paper machine's pulping equipment.

         The paper machine production line is composed of many ancillary equipment, and there are many ancillary equipment in it. Among them, the pulping equipment is one of the important supporting equipment, and it occupies an important place in the paper machine production line. In the production line, if there is no pulping equipment, the pulp raw material cannot complete the pulp production operation, and the remaining papermaking production process cannot operate normally.

        The main role of pulping equipment in the paper machine production line is very important. It is to break the fibers after the raw materials are crushed, stirred and collided in the paper machine production line. After the broken fibers are subjected to water absorption and collision, the fibrous materials can be well beaten. The shredding treatment and the continuously thinning fiber can well allow the paper machine production line to proceed to the next step of production. At the same time, the pulping equipment can also mix all raw materials and additives, make all parts of the paper machine uniform, and can also make the quality of the paper produced better, playing a certain auxiliary role.

Throughout the modern new high-speed headbox paper machine, it basically has the following main features:

(1) Adopt high-efficiency hydraulic slurry rectifying components. Through the design of different structures and sizes of the hydraulic slurry rectifying elements, different slurry flow conditions can be adjusted and controlled to meet the requirements of different process conditions.

(2) Pay attention to the role of the slurry chamber. The slurry stabilization chamber can eliminate and attenuate energy fluctuations and stabilize the slurry flow. For a full-flow air-cushion combined headbox, the slurry stabilization chamber is a place where air cushions are generated and air bubbles are eliminated.

(3) The narrow and long flow channel is used to produce controllable fine turbulence. The narrow and long flow channel can be used in the outlet section of the headbox to control the turbulence of the outlet slurry flow to generate fine-scale turbulence, which is more prominent in the vane headbox.

(4) The trend is toward a rectification of pulp distribution. Most of the new headbox paper machines are two-stage pulp rectification, but there are also attempts to develop into a primary pulp-distribution rectification. If the slurry flow can be well distributed, this may become a development trend in the future.

(5) Equipped with external pulse attenuation device. One weakness of the full-flow headbox paper machine is that it is very sensitive to pressure pulsation. Therefore, in addition to improving the headbox itself, an effective method is to install an automatic pulse attenuator outside the machine.

In the future, the design of the headbox paper machine will continue to develop towards the following trends:

(1) Through adjusting the pulp density to control the full width transverse quantitative. The eye-catching new technology in the 1990s was the full-frame lateral quantitative controller. Compared with the traditional headbox lip bending adjustment method, it can not only effectively adjust the uniformity of the full width transverse quantitative, but also maintain the uniformity of the full width fiber orientation, which is a better quantitative control method.

(2) Towards the direction of adapting to various shapers. In the transformation of existing paper machines, it has become a trend to retain the original organisms and change the wire. Since different shapers have different requirements for the headbox, the headbox must be designed to adapt to various shapers.

(3) The headbox paper machine is developing towards more precise adjustment and better control.

The spiral surface coating is repaired using the multi-layer wood plasma surfacing technology, which uses a plasma power source to form a high-temperature arc column on the damaged surface, melting the composite coating of tungsten carbide alloy powder, thereby repairing and restoring scars on the mechanical surface.

Plasma surfacing technology has the following advantages for workpieces.

①Restore the original size of the workpiece, restore the workpiece, refurbish and reuse.

②The special powder used for welding technology can make the repaired part more wear-resistant and corrosion-resistant.

When we use the toilet paper processing equipment, we should pay attention to cleaning, so as not to let the sundries fall between the steel roller and the wool roller, so as to avoid friction on the machinery. In addition, stable voltage is required. If the voltage is unstable, it will easily damage the motor. Some small parts of toilet paper processing equipment are easy to wear out, such as gears, printing knives, belts and other small parts, usually pay attention to the maintenance of these small consumable parts. The transmission device of toilet paper processing equipment, such as mechanical parts such as chains, need to be lubricated regularly to avoid rusting and affect the production efficiency of toilet paper processing equipment!

When toilet paper processing machinery and equipment make toilet paper processing, the following points should be paid attention to:

1. The height of the cardboard and packaging board stacked at the sorting place of the toilet paper machine shall not exceed 1.5 meters and shall not be skewed. The packaging board must not be placed vertically to prevent overturning and injury.

2. When opening the mechanical lifting platform for paper products, care should be taken to prevent injury.

3. The sorting place should be kept clean and the road is clear, and scrap metal and damaged packaging boards should be cleaned up in time to prevent iron sheets or nails from hurting feet.

4. Pay attention to the wood thorns when handling the packaging board to prevent the skin from being stabbed.

5. During the transportation, attention should be paid to the obstacles on the ground to prevent the dumping of the paper pile from hurting people.

6. Sitting, drowsiness and relying on piles of paper are not allowed.

7. Wear protective gloves when choosing paper-making machinery to prevent cardboard from cutting hands, and pay attention to forklifts to avoid being hit.

As we all know, the sizing roll and Squeeze roll in the size tank are arranged in pairs, and half of the sizing roll is immersed in the slurry. When the sizing roller rotates, the sizing can be brought to above the liquid level, so that the yarn is always surrounded by sufficient sizing before squeezing, and the dipping time is prolonged. So what are the specific differences between the sizing roll and the Squeeze roll?

Sizing roll are generally seamless steel pipes with chrome-plated surfaces, which require a smooth, rounded and wear-resistant surface; while Squeeze rolls are generally cast iron rolls covered with nitrile rubber, with smooth surfaces and microporous surfaces. The three technical indicators of Squeeze roll are directly related to the sizing: 1. The surface state of the squeeze roll, that is, whether it is a smooth roll or a microporous roll; 2. The surface hardness of the Squeeze roll; 3. The effect of the Squeeze roll on the warp and the sizing roll Pressure, namely squeezing force. The above are some related introductions about the difference between the sizing roll and the Squeeze roll. I hope it will be helpful for your further understanding.

In the 21st century, with the continuous improvement of scientific and technological level, the performance of domestic papermaking equipment has been significantly improved in all aspects. In recent years, with the continuous expansion of foreign market demand, the sales of papermaking machinery and equipment have also reached a historical peak, and it has also promoted the sales of the entire papermaking equipment. Since the 21st century, with the continuous improvement of science and technology, the performance of domestic papermaking equipment has been outstanding in all aspects. Push the papermaking machinery and equipment to a historical peak.

Modern papermaking technology can be divided into pulping, modulation, copying, processing and other main processes. The process is cumbersome. The equipment used in the whole process includes: material preparation equipment, pulping equipment, and papermaking machinery. Especially papermaking machinery, it involves many types, such as refiners, pressure screens, filters, forming machines, dryers, separation equipment and so on. The smooth progress of the paper machine equipment in the processing process is inseparable from the assistance of the bearings, and the paper machine will fail during the normal operation, which is likely to be caused by the bearing failure. Therefore, the bearing is an indispensable component. For the normal operation of the work, the following describes the requirements of papermaking machinery and equipment for bearings.

1. Reliable online use: Paper-making machinery and equipment should ensure continuous and uninterrupted operation, and normal maintenance must be carried out before shutdown. Therefore, when selecting bearings, extremely high reliability of online use is the most important reference index.

2. Easy installation and disassembly: In the normal maintenance and maintenance process, the bearing can be quickly disassembled and installed, thereby shortening the downtime and creating greater value.

3. Automatic compensation abnormality: factors such as the length of the roller, the temperature and the bearing support position may cause the shaft to elongate in the axial direction, thereby causing the bearing to be off-center or axially offset. The bearing must be able to adapt to changes in operating conditions.

4. Corrosion resistance and high temperature resistance: The high humidity environment in the wet part of papermaking machinery and equipment causes serious damage to lubrication, which ultimately affects the service life of the bearing. The high working temperature of the dryer and the working temperature of the bearing also affect the lubricating performance of the bearing. Therefore, the requirements for bearings are getting higher and higher.

5. Adaptation accuracy and speed: When configuring and selecting bearings, the adaptability of the bearing itself under high-speed conditions must be considered, and radial clearance C3/C4 is generally recommended.

Generally speaking, from the point of view of use, the clearance between the bearings should be appropriate. If it is too large, it will cause impact, and if it is too small, it will cause poor lubrication and may burn tiles. Then, the surface quality and geometry of the bearings and journals should be strictly guaranteed. ; Bearings of papermaking machinery and equipment should improve the quality of lubrication, control the pressure, temperature and flow of oil, and strengthen oil filtration; secondly, use fuel and lubricating oils that meet the requirements. In order to make the bearings of papermaking machinery and equipment give full play to and maintain their proper performance for a long time, regular maintenance or regular inspection should be done effectively. Regular inspection, early detection of faults and prevention of accidents are very important to improve the production efficiency and economy of papermaking machinery and equipment.

Papermaking equipment dewatering device, papermaking machine is the general name of the complete set of equipment that makes the pulp form the web of the linkage, including the headbox, wire section, press section, drying section, calender, roll machine and transmission section, etc. Main machine and auxiliary systems such as steam, water, vacuum, lubrication and heat recovery.

Transmission system

Connect the various parts of the paper machine to run synchronously, so that the machine and electricity are integrated. It is composed of mechanical deceleration device, speed regulating and speed stabilizing device, branch transmission device, etc., and all use electric power as the power source.

White water system is a recycling, processing and recycling system for the dewatering of the forming section of the paper machine. Including white water collection, transportation, filtration or sedimentation, air floatation and other equipment to separate and recycle fiber and filler for reuse, as well as the entire system for recycling clean white water in the papermaking process.

Today, the editor of Shandong easttai takes everyone to understand the advantages and working principle of agitator：

Advantage:

1. Flexible and easy to maintain.

2. Rubber seal or rubber packing seal

3. It can be used in pulp storage tank, pulp tower, mixing tank, dry paper tank and pulp tank paper machine.

working principle:

The mixing impeller is driven by the power unit to rotate in a fixed direction; during the rotation, the material is driven to rotate in the axial direction and in the radial direction. The materials in the mixer have axial and circular motions at the same time, so there are several stirring forms such as shear stirring and diffusion stirring at the same time. It can effectively stir and mix materials quickly.

The specific operation method is operated according to the paper cutting machine manual. The safety operation procedures are as follows:

1. Before starting the machine, you should first check the machine, do a good job in cleaning, add oil or butter, first test the empty knife three times, and observe whether there is a return knife. If any problem is found, it should be eliminated in time. Knives should be parked immediately, repaired in time and not allowed to operate while sick.

2. When working, the thinking must be concentrated, and it is strictly forbidden for two people to operate the paper cutting machine at the same time.

3. When the machine is running, it is strictly forbidden to put your hand into the machine. If a fault occurs, it is strictly forbidden to use your hands to grab the paper. You should stop the machine immediately.

4. When adjusting and replacing the cutter, it is necessary to stop the machine. Even in the case of shutdown, it is strictly forbidden to put your hand under the knife to change the tool. Long-handled bolts and other tools should be used to change the tool. It must be removed during the test run to avoid injury to the operator when the machine is started.

5. The power supply must be cut off when the machine is adjusted, the blade is replaced, and the power supply must be cut off when repairing, refueling, scrubbing and checking.

The paper cutting machine is a dangerous machine. It must be operated under the condition of ensuring safety. Make sure that the infrared safety protection function is effective. In any case, wait for the knife to completely stop at the highest point before operating under the knife. Try not to put your hands directly under the knife for operation, you can use a hardwood pad under the knife for operation.

Knowing some knowledge about the operation of paper cutting machine is good for entering this type of enterprise in the future to avoid potential safety hazards and protect your own personal safety. This time, I will talk about it here, and I will learn more about this knowledge next time.

Hard calender: In-machine zone controllable medium and high hard calender

Performance: Our company has successfully developed a controllable medium and high hard roll calender, which is used for finishing paper before coating, improving smoothness and reducing thickness difference.

It is widely used in coated white paper and other paper types. Features: The surface hardness of the hard roller is large, and the thickness of the paper is balanced by the action of high temperature and high pressure on each area. 

The general thickness can be controlled in each zone <=0.01MM. It greatly improves the smoothness of the paper and plasticizes the surface of the paper, reducing the amount of coating.To improve tightness,smoothless and glossiness of the sheet surface. Control the thickness of the sheet. Before getting into coating improve and control the paper roughness and porosity.