Sendemory Metal Products Co., Ltd.

Introduction
Working Principle Dual-rotor Continuous Mixer Structure Dual-rotor Continuous Mixer is the first new type of rubber and plastics successfully developed by our school in China that can work continuously while maintaining the superior mixing characteristics of an internal mixer. Continuous mixing machinery. Its appearance is very similar to a twin-screw extruder, but the feeding and discharging methods are different from that of a twin-screw extruder. The machine is mainly composed of barrel, rotor, unloading device and other parts. The mixing chamber of the equipment barrel is two interconnected holes with a rectangular cross-section. The material is sheared, crushed, kneaded and mixed by the rotor in the mixing chamber. The barrel also has cooling water holes and an electric heater, which can heat and cool the materials according to the needs of the process. The rotor structure can be divided into a feeding section, a mixing section and a discharging section according to its functions. The feeding section of the rotor is like a pair of non-meshing twin screws, and its surface is composed of rectangular threads. It transports the materials added by the metering feeder to the mixing section. The mixing section of the rotor is like a pair of internal mixer rotors. Its surface has two pairs of spiral edges with opposite rotation directions and different angles. The spiral edge connected to the feed section transports the material forward, and the spiral edge connected to the discharge section transports the material in the opposite direction, where the material is compressed, melted, sheared, stretched, and finally mixed and plasticized. The discharge section of the rotor is oval, where the material is discharged from the barrel through the discharge port. The discharge device consists of a discharge door and an adjustment device. By adjusting the discharge adjustment device, the opening degree of the discharge door can be controlled to control the residence time of the material in the mixing chamber. The working process of the double-rotor continuous mixer. Various polymer materials are added to the continuous mixer through the quantitative feeder and sent to the mixing section by the thread of the rotor feeding section. In the rotor mixing section, the material is first pushed forward by the part of the spiral edge connected to the thread of the feeding section, while the part of the spiral edge connected to the discharge section forces the material to move in the opposite direction. In this way, materials are accumulated here and are sheared, rolled, crushed, melted and mixed. With the continuous addition of new materials, the mixed materials are eventually forced to move to the discharge section and discharged through the discharge door. Since the discharge volume of the continuous mixer is determined by the amount of material added, the equipment can work in a hungry state or a state full of materials. Therefore, by controlling the amount of feed, the residence time of the material in the mixer and its output can be adjusted. The adjustable working parameters of this machine include feeding speed, rotor speed, back pressure, temperature, discharge port opening, etc. Experiments show that the discharge temperature increases with the increase of the rotor speed, and decreases with the increase of the discharge door opening. The input power increases with the increase of the output (feeding rate) and rotor speed, and decreases with the increase of the discharge door opening. decreases as the barrel temperature increases. During the operation of the twin-rotor continuous mixer, the mixing effect on the materials mainly occurs in the mixing section of the rotor. Since the eight helices on the two rotor mixing sections have different lengths, helix angles and directions of rotation, the material will receive thrust from the eight helices with different sizes and directions. Therefore, during a cyclic flow process, the moving speed and direction of the melt will change at least twice. Usually during the mixing process of materials, in a mixing section, the flow speed and direction will change by about 10 times. This change further intensifies the renewal of the material mixing interface and the degree of flow disorder, promotes the fragmentation and dispersion of the dispersed phase, and the formation of new phase interfaces, which is extremely beneficial to the dispersion and mixing of the material and the elimination of low-melting point volatiles. , making the machine have good dispersion and mixing characteristics and degassing performance. Features of the dual-rotor continuous mixing and granulating unit We combine the dual-rotor continuous mixing machine and the hot-feeding single-screw extruder to form a set of dual-rotor continuous mixing and granulating equipment with continuous mixing and extrusion functions. Granule unit. Compared with traditional mixing equipment, this equipment has the following characteristics: Reasonable structural design using the latest mixing theory, a newly designed double mixing section structure by computer, wedge-shaped high-efficiency rotor configuration (national invention patent), high shear rate , good dispersion filling and mixing effect, large production capacity. A variety of rotor structure configuration combinations can meet various mixing process requirements for different materials. Split barrel, convenient and quick material cleaning. Two-stage arrangement, which separates the mixing function and extrusion function of the machine. The process has wide adaptability. Excellent filling, dispersion and mixing capabilities. The uniquely designed electric heating and closed-circuit constant-temperature soft water cooling system makes the adjustment and control of the temperature of each section more flexible and effective, and can pass water to cool the core of the mixer rotor and extruder screw respectively. Many controllable variables and good versatility. During the working process of the mixer, by adjusting operating parameters such as feeding speed, rotor speed, barrel temperature, discharge port opening, etc., the mixing process can be adjusted and controlled online to achieve the desired results. Excellent mixing effect, no need to stop and adjust. Easy maintenance, no complicated thrust bearing system, simple and convenient operation and maintenance, low energy consumption and low operating costs (under the same process conditions, the energy consumption per unit product is ~% lower than that of conventional equipment). The barrel has a split structure for easy and complete material cleaning. The rotor adopts a dual mixing section segmented structure. There is no need to disassemble the bearing when disassembling the rotor, making maintenance and repair quick and easy. High degree of automation. The entire system adopts advanced centralized control, which can keep the mixing operation process of the equipment in the best state. Perfect interlocking and joint control ensures automated, efficient and safe production, and stable product quality. The real-time operation process monitoring and recording system realizes real-time recording, display and remote transmission of operating parameters, providing a strong guarantee for stable production and product quality control. The mixing elements have good wear resistance. The mixing chamber of the barrel is made of imported carbide inserts. The rotor is made of high-quality nitrided steel and has hard alloy surfacing on the surface, which solves the problem of equipment wear. The granulation methods are diversified and can be applied to different process requirements. The granulation of this unit can be matched with pulley cutting and granulating equipment, underwater cutting and granulating equipment, and air-cooled and hot-heated granulating equipment according to the mixed materials. For equipment with low labor intensity and good environmental protection, loss-in-weight metering is recommended, without the need for high-speed mixer pretreatment. The labor intensity of workers is low and the environment is good.
Industrial application
Masterbatch, filling masterbatch, cable materials and other industries. This equipment can be used for mixing and granulating filling masterbatch and color masterbatch. It has the characteristics of uniform dispersion, large filling volume and process It has the characteristics of simplicity, high production capacity, and energy saving. It can undertake mixing operations that cannot be completed by twin-screw compounding extruders, such as highly filled black masterbatch (carbon black filling amount is above %), halogen-free flame retardant cable materials (filling amount above %), various medium and high voltage cable shielding materials, high-grade color masterbatch (filling amount up to %), pressure pipe special masterbatch, lubricant-free high-dispersion high-filling masterbatch, high-end cable special materials, etc. At present, our country's market urgently needs high-quality rubber and plastic blending and modified materials. The chemical building materials industry can use this equipment to produce wood-plastic composite materials using waste resin, wood chips, paper mill waste residue, sugar mill waste residue, crop straw and other waste materials as raw materials. It can not only reduce the impact of these industrial and agricultural wastes on the environment, but also It can also reduce the demand for wood, protect forest resources, is conducive to environmental protection and improvement, and is in line with my country's industrial policy and sustainable development strategy. In addition to being used in the packaging industry, this type of wood-plastic composite materials can also be used in construction, decoration, furniture and other industries. This unit can be used to effectively mix thermoplastic elastomers to produce high-end waterproofing membranes that are urgently needed in the country, replacing imports and solving the common roof and wall leakage problems in the domestic construction industry. New materials and functional masterbatch This equipment has strong filling and mixing capabilities and is an ideal mixing equipment for manufacturing new polymer materials and functional masterbatch. It can be used for rubber and plastic modified materials, special polymer materials, and nano-filling Manufacturing of polymer materials and functional materials. The internal mixer generally consists of an internal mixing chamber, two relatively rotating rotors, an upper ejector bolt, a lower ejector bolt, a temperature measurement system, a heating and cooling system, an exhaust system, a safety device, a discharge device and a recording device. The surface of the rotor has spiral ridges, and the number of ridges is two, four, six, etc. The cross-sectional geometry of the rotor is triangular, cylindrical or elliptical, and there are two types: tangential type and meshing type. . The temperature measurement system is composed of thermocouples, which are mainly used to measure the temperature changes in the mixing chamber during the mixing process. The heating and cooling systems are mainly used to control the temperature of the rotor and the surface of the mixing chamber chamber wall. The automatic tipping bucket elevator, loading motor, upper and lower limit switches, and specially optimized arc design of the slideway ensure smooth and reliable transportation. , The lifting hopper is made of stainless steel, and each pot can carry the amount of material/pot. , transport the lump material kneaded by the kneader to the cone double feeder. . The elevator control system should be moved to the double-wrist feeder and AC motor next to the control of the internal mixer. The speed control system adopts a variable frequency speed regulator, a twin-screw feeding screw for forced cutting, nitride chromium plating treatment, and a high surface finish. The screw running direction is counter-rotating. The inner surface of the feeding body is polished and chrome-plated. It is durable. The inner surface of the feeding hopper is polished and chrome-plated. It is sturdy and durable. The single-screw and reduction gearbox adopt a series of professionally designed supporting single-screw rubber and plastic extruders. The gear transmission device with high-precision hard tooth surface and thrust seat is designed in accordance with the technical specifications specified in the "Cylinder Gear Reducer". The output shaft is made of high strength, and other gears and shaft parts are made of high-strength materials. The gears are carburized and Processed by quenching and gear grinding process, the gear has high precision and hardness. The gear precision is , grade, and the tooth surface hardness is ~. A thrust bearing is equipped at the front end of the hollow output shaft to withstand the axial thrust of the screw when it is working. The whole machine is small in size and has high load-bearing capacity. High, smooth transmission, low noise and high efficiency. When the oil level is lower than the oil level, please add medium-load industrial gear oil or (the oil needs to be purchased by the customer). The material of the screw is nitrided. The material is nitrided. The deep brittleness is not greater than grade. The surface of the screw is hard chromium plated. ) The core of the screw is cooled by water, barrel) The screw barrel is cooled by water) The barrel is slotted, coiled copper tube, cooling water) The screw barrel is equipped with a protective cover, made of stainless steel) The heating section is heated by high-quality cast aluminum machine) The machine head is heated by a mold temperature machine
Water ring granulation
) One speed regulating device of the hot-heating granulator is a frequency converter) The hot-heating granulation cover is horizontal, made of stainless steel) Water pump One,) diversion trough made of stainless steel, one piece) centrifugal dehydrator, the water tank is made of high-quality stainless steel. The dried finished material is sent to the intermediate silo through a high-pressure fan). One intermediate silo, made of high-quality stainless steel, buffer silo. One piece, high quality stainless steel. ) Automatic weighing system set, including electronic meter and butterfly valve) One high mixer, two-speed motor power, high-quality stainless steel mixing blades, one electrical control system, and a stainless steel buffer bin for discharging materials under the high mixer , the mixed finished materials are sent to the ebullating bed through a high-pressure blower. ) One ebullating bed, made of stainless steel, with boiling fan power.) One extended vibrating screen. The motor adopts a special vibration motor. The vibration amount can adjust the size of the motor power rate. The two vibrating screen meshes use three layers to separate materials. Large hole diameter, small hole diameter The hole diameter is made of stainless steel and equipped with a high-pressure fan to send the material to the air-blown silo). There is a set of air-blown silos and one silo. The stainless steel material is made of stainless steel and is connected to the material conveying fan by a stainless steel pipe. ) A set of host control cabinets and a set of auxiliary control cabinets can also be used to mix and produce various high and low voltage cable shielding materials using a double-rotor continuous mixer. This equipment not only achieves continuous production, but also ensures high mixability of the filling materials. Reduce dust and other pollution and achieve a green and environmentally friendly production process.
Features
Model Product Name Purpose Cross-linked semi-conductive shielding material cable core inner shielding Peelable semi-conducting shielding material cable outer shield Thermoplastic semi-conducting shielding material cable core shielding 2. Product technology Requirements. The appearance is smooth black cylindrical particles with a diameter of 100 mm or more, uniform in size and color, and there should be no visible scorched particles and other impurities. .Typical values of performance indicators of shielding materials are specified in the table. Serial number test item (standard test method) Unit density of semi-conductive shielding material for cross-linked polyethylene cables (℃) / .~. Tensile strength. Elongation at break ℃, air box thermal aging ℃ tensile strength change rate + + elongation at break Length change rate + thermal elongation ℃, elongation under load. Permanent deformation ℃ Volume resistivity &. Peel strength (℃) Chemical temperature ℃ Note: The data in the table are typical values and cannot be regarded as standards for specification limits or quoted separately. Design basis. 3. Product Description Semi-conductive shielding materials for cross-linked polyethylene cables are divided into cross-linkable and thermoplastic materials. The semi-conductive shielding material is made of imported raw materials mixed with imported acetylene carbon black and plasticized. The extruded surface is smooth and has good compatibility with the insulating material for power cables. It can be in close contact with the insulating layer, improving the relationship between the shielding and the insulating layer. The microscopic characteristics of the interface between them are conducive to the long-term stable and reliable performance of the cable. 4. Processing Guide: This type of material can be extruded by a conventional extruder. (See the product process guide for details) 5. The product is packaged in moisture-proof packaging, lined with polyethylene film bags, and packed into a special hard box that is not easily damaged. The net weight of each box is (.).
Formulation process
The formula of internal and external shielding cable materials is polyethylene, acetylene black, graphite powder, antioxidant, organic peroxide, accelerator, coupling agent and magnesium oxide. , stabilizer. parts, methyl silicone oil parts, alkaline neutralizer parts, and processing oil parts. The performance index volume resistivity is less than the tensile strength and can reach above. The peel strength is controlled to be able to use the equipment and process internal mixer for a long time at ℃. Elevator double-wrist feeder single-screw granulator water ring granulator centrifugal dehydrator air-cooled extended vibrating screen automatic weighing system dosing system high mixer ebullating bed finished product silo
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