English
A rolling equipment for producing degraded reed sheets
Reed (scientific name: phragmites comunis (cave.) trin. exoud.) is a perennial aquatic or wetland tall grass with well-developed rhizomes. The stem is upright, 1-3 meters high, with over 20 nodes. Reed is a diverse species widely distributed worldwide. Born along rivers, lakes, marshes, ponds, ditches, and low-lying wetlands. For example, in the Bosten Lake in Xinjiang, there are a large number of reeds that have been abandoned, causing problems such as eutrophication of the water body; Reed contains a large amount of reed cellulose, which is one of the good raw materials for preparing biomaterials. The development of organic polymer materials has played an important role in human society, but most organic polymer materials have almost no biodegradability, making environmental pollution increasingly serious. Therefore, there is an urgent need to design biodegradable materials. It is difficult to balance the performance of biodegradable materials while designing and emphasizing their degradability, or in some cases, sacrificing the performance of materials may be necessary. This makes it difficult for existing biodegradable material systems to meet the needs of multiple surfaces simultaneously. At the same time, considering cost, biodegradable materials are difficult to be widely used. Reed is a naturally growing plant with readily available raw materials and low prices. Therefore, using reed as a biodegradable composite material is a new development trend.
The present invention is a biodegradable composite material mainly composed of reed material, comprising the following raw material components in a mass fraction ratio: 15 to 50 parts of reed crushed material, with an average diameter of 5 to 15 microns after reed crushing; 15 to 30 parts of modified starch; 10 to 50 parts of biodegradable resin; 0.5 to 1 part of coupling agent; 1 to 10 parts of active agent; 1 to 3 parts of degradation complex enzyme; 1 to 3 parts of degradation cycle regulator; The degradation complex enzyme is selected from one or a mixture of oxidoreductases, lyases, transferases, isomerases, synthases, sucrases, glutamate dehydrogenases, amylases, or dehydroascorbic acid; The degradation cycle regulator is selected from one or a mixture of one or more of diisopropylbenzene oxide (dcp), methyl ethyl ketone peroxide (mekp), 2,2,2, di (tert butyl peroxide) butane (dbpb), or tert butyl peroxybenzoate (bpb). Based on the above polymers, a 4-roll rolling structure is used to extrude sheet and board materials, which are used for vacuum forming disposable tableware, fruit trays, gift boxes, packaging boxes, automotive interiors, furniture and household appliances, logistics and e-commerce packages,
The structure is as follows:
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 fabric bonding, steel cord bonding, rubber material pressing, rubber blank molding, isolation film bonding, and multi-layer film bonding. The Z-shaped roller arrangement is reasonable, which can reduce the elastic deformation of the roller and facilitate feeding. Therefore, one of the necessary working conditions for the widely used 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 a certain pattern and shape, while others need to combine multiple layers of film with different purposes, colors, and shapes together. 1. Ordinary rolling mill: The commonly used four roll rolling mill in China is the Φ 610 × 1730T type four roll rolling mill. 2. Precision rolling mill: In addition to the main components of a regular rolling mill, a series of measures are also adopted to improve the accuracy, speed, and ease of operation of the rolling mill. There are mainly: inclined T-shaped, S-shaped (Φ 700 × 1800), Z-shaped [2], mainly composed of rollers, frames, roller distance adjustment devices, roller temperature adjustment devices, transmission devices, lubrication systems, control systems, and roller dismantling devices. In addition to the main components and equipment of ordinary rolling machines, precision rolling machines have added devices to ensure rolling accuracy.
2.4 Roller principle
3.1. 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. According to user needs, various auxiliary machines can be configured to form an intermodal production line process as follows:
S0 raw materials are added to the hopper and fed into the mixer by the 1 # Jiaolong feeding machine. The reed and polymer are then spiral fed into the mixer, mixed evenly with processing aids and polymer modified raw materials. Z is then fed into the extruder hopper S1 by the 2 # Jiaolong spiral feeding machine. The extruder is equipped with a hopper, twin-screw extruder, screen changer, and hanger mold. The raw materials enter the hopper and sink with their own weight. The motor drives the reducer to drive the extruder screw to rotate, pushing the raw materials to move along the spiral curve and heating the solid to form a solution. After passing through the screen changer device, the impurities in the raw materials are filtered by the pressurized separation of the mesh. The solution enters the T-shaped mold through the connector.
S3, The mold is installed in parallel, and the raw materials enter the 4-bar calendering mechanism, which are covered by two layers of AB raw materials. These two materials depend on the application field and can be compounded, PA，PET， Paper, aluminum foil, copper foil, PS，PVC， Suitable for medical, food, industrial, building materials, military industry, electronics, furniture, and home appliances. By adopting a 4-stick calendering composite process, the singularity of coating and coating methods has been solved, and a wider range of materials have been selected, improving the application field of reed degradation materials and creating greater economic value.
S4， After the material is compressed and laminated with 4 sticks, it enters the traction part through the 1 # guide bracket. The guide bracket is equipped with a row of guide rollers and a trimming device. The sheet enters the traction part and needs to be trimmed on both sides. The traction part is equipped with traction rollers and a driving motor. Open and close the cylinder for easy operation.
After being pulled, the S5 material enters the 2 # guide bracket and enters the cutting area. The guide bracket is equipped with a row of guide rollers, and the cutting area is equipped with a cutting blade, which is pulled by a servo motor and measured by an encoder. Automatically cut when reaching the set length. Enter the conveyor frame.
S6 conveyor is equipped with a row of guide rollers. When the material enters, the guide rollers slide along with the sheet pushing force and enter the storage position.
The S7 production line has a high degree of automation, saves manual labor, and is suitable for mass production, non-standard customization, as well as scientific research and teaching applications.
