English
A four roll rolling mill refers to a rolling mill with four rollers arranged in various forms such as T-shaped, L-shaped, S-shaped, and Z-shaped, which has the characteristics of high efficiency and high precision. Mainly used for precision rolling of non-ferrous metals, absorbing materials, shielding materials, and magnetic materials
In the rubber industry, it is mainly used for pasting fabrics, pasting steel cord fabrics, pressing rubber materials, shaping rubber blanks, pasting isolation films, and multi-layer film bonding. The Z-shaped roller arrangement is reasonable, which can reduce the elastic deformation of the roller and facilitate feeding, so it is widely used
One of the necessary working conditions for the rolling process is that the friction angle ρ between the rubber material and the roller must be greater than the contact angle α in order for the rubber material to be pulled into the roller distance. During the rolling process of a four roll rolling mill, the rollers work at a certain speed ratio to further knead and increase the plasticity of the rubber material. Finally, through the minimum roller distance, it is rolled into a film with a certain thickness and width; Under the pressure of the roller, press the film onto the textile or steel cord fabric. Some need to be pressed into certain patterns and shapes, while others require combining multiple layers of film with different purposes, colors, and shapes together
Principle of pressure roller
1. The design structure is concise, clear, and easy to operate.
2. There are multiple speeds and speed ratios to choose from, which can meet the requirements of different formulas and processes for a wide range of users.
3. The rack and base are all welded structures and undergo annealing to remove stress, resulting in a beautiful and elegant appearance.
4. The reducer has a precision of level 6, with hard tooth surface grinding for gear processing, long service life, and low noise.
5. A comprehensive emergency parking system can ensure the safe use of personnel and equipment to the maximum extent possible.
6. Specially designed sealing structure to prevent lubricating oil leakage.
7. Rolling bearings are used for all rolling machines.
8. The roller is made of alloy chilled cast iron (LTG-H) with a rotating joint and a surface finish of Ra0.8, which can be used for medium height. Hollow and drilled rollers are available for selection.
9. The speed ratio gear with a single output shaft structure adopts herringbone teeth for smooth transmission, and the speed ratio can be adjusted by pulling the key.
10. Various deflection compensation measures are available for users to choose from, including medium height, anti bending, and axis crossing.
11. There are different levels of electronic control systems available for users to choose from, including bus control system, PLC control system, and ordinary control system.
12. The single shaft transmission structure eliminates the large and small drive gears.
13. A flexible and versatile design system that can meet customers' special design requirements in the shortest possible time.
14. Various auxiliary machines can be configured according to user needs to form an intermodal production line
Global plastic pollution has surpassed the ecological tipping point, with over 300 million tons of plastic waste entering the oceans every year, posing a threat to human health and the future of the planet. Bamboo, an ancient and modern green resource, is becoming a key to cracking white pollution and promoting sustainable development.
1、 The social value of developing bamboo fiber industry
The carbon sink efficiency is enormous
Bamboo plants can grow up to 1.21 meters per day, with a carbon sequestration capacity 1.46 times that of Chinese fir. The annual carbon sequestration per hectare of bamboo forest reaches 5.09 tons, forming a unique "negative carbon factory" effect.
Outstanding biodegradability
Bamboo fiber completely degrades in 180 days under natural conditions, compared to the 500 year decomposition cycle of plastic, creatively applying bamboo fiber to the emerging industry of "replacing plastic with bamboo".
Energy consumption revolution
The energy consumption in the production of bamboo fiber products is only one-third of that of plastic products, and the entire process achieves a closed-loop of biomass energy, completely eliminating dependence on fossil fuels.
Economic leverage effect
The comprehensive output value of bamboo forests in China can reach 45000 yuan per hectare, forming a green economy network covering 45 million practitioners and supporting the national rural revitalization strategy.
Breakthrough in material performance
The tensile strength of bamboo fiber is 1.8 GPa, surpassing ordinary steel, with an elastic modulus of 40-50 GPa. After modification, the thermal deformation temperature can reach 205 ℃, achieving a generational leap in structural materials.
Significant public value
The natural antibacterial rate of bamboo quinone substances is 99.8%, eliminating the risk of microplastic accumulation in the human body and reducing health damage caused by plastic packaging by 3 million tons per year.
Innovation in Water Resource Protection
The water consumption in the production of bamboo fiber products is only 1/20 of that of plastic products, and the entire process has zero toxic emissions, solving the problem of microplastic pollution in water bodies.
Land Efficiency Enhancement Model
The transformation of degraded bamboo forests increases soil organic matter by 2.3% annually, and bamboo fiber can create a composite land use paradigm of "carbon sequestration improvement output".
Global climate governance
Promoting 100 million hectares of bamboo forests globally can achieve an annual carbon sink of 1.2 billion tons of CO ₂ equivalent, equivalent to 38% of the EU's 2030 emission reduction target. Bamboo fiber is an ideal core for industrial bamboo application.
Civilization inheritance and innovation
By integrating Eastern bamboo culture with modern technology, bamboo fiber products have established a new paradigm of dialogue between traditional wisdom and modern civilization, highlighting the sustainable development of human civilization.
2、 Innovative application of bamboo fiber
Bamboo fiber textile
The unique structure and function of bamboo fiber, as the fifth largest natural fiber in the world, have good development prospects in the development of textiles.
Bamboo based composite materials
The bending modulus of bamboo fiber PLA composite material reaches 8.5GPa, which can be applied in the manufacturing of new energy materials such as automobiles, high-speed trains, ships, drones, wind turbine blades, photovoltaic brackets, battery shells, etc.
Bamboo wrapped pipeline
Bamboo wrapped composite pipes with a burst pressure of 6MPa can replace traditional HDPE pipes in municipal engineering, reducing the total lifecycle cost by 40%.
Bamboo fiber packaging
Bamboo fiber has been modified to form a unique structure, with a 300% increase in barrier performance, and has been widely used in the packaging field.
Bamboo fiber aerogel
The ultra light gas gel with thermal conductivity of 0.023W/(m · K) has become a new generation of thermal insulation material.
Bamboo based activated carbon filter cartridge
The activated carbon prepared from bamboo fiber has a specific surface area of 2800m ²/g, achieving a breakthrough of 99.97% VOCs adsorption rate in the field of air purification.
Bamboo fiber reinforced concrete
Adding bamboo fiber can improve the crack resistance of concrete by 60%, ushering in a new era of green building materials.
Bamboo based bioplastics
The PLA composite material with a bamboo cellulose content of 65% has achieved a thermal deformation temperature breakthrough of 200 ℃ in the field of 3D printing.
Bamboo fiber diaphragm
The separation membrane with an oxygen permeability coefficient of 600 Barrer has revolutionized industrial separation processes.
Bamboo building materials
The seismic performance of bamboo boards and components produced from bamboo fiber reaches 9 degrees of fortification, reducing the construction period by 50% and reconstructing the modern architectural paradigm.
