Delong production
Car interior sheet extruder
Plastic sheet extruder
Modified sheet extruder
Manufacturer customized car interior extruder
1.
Car interior sheet extruder
Production line process
Pressurized internal mixer&automatic stainless steel elevator&forced feeder&single screw forming mold Three-roller extrusion surface treatment tractor plate corona treatment & cutting machine & stacking hydraulic foaming machine
2. Introduction to the characteristics of each component of the extruder
, internal mixer function
/>Resins, additives, fillers and other materials are put into the internal mixer, and the polymer materials are continuously mixed through the rotor of a specific shape and relatively rotating in a sealed state with adjustable temperature and pressure. It is mainly composed of The internal mixer is a sealed mixing chamber, so its working environment is relatively small The clean twin rotors rotate at asynchronous speeds and have a strong shearing function. The leftover materials during the production process and the defective products produced during subsequent molding can be directly put into the internal mixer to extrude the plate again without crushing
, Cone Double Forced Feeder
Motor power, using frequency converter. The feeding screw has a conical twin-screw forced cutting, chromium nitride plating, and high surface finish. The inner surface of the feeding hopper is polished and hard chromium plated. It is smooth and wear-resistant and adopts a lock-type protective cover, which is required to be easy to replace and maintain. The surface of the feeding body is polished and hard chromium plated, making it smooth and wear-resistant. Push-pull type for easy movement. The appearance requires that the motor, reducer and other transmission parts have integral protective covers. The connection between the cone double feeder and the single screw is a Harvard-type structure, which is convenient for disassembly and cleaning.
Automatic stainless steel elevator
Transports the pellet materials completed by the internal mixer to the forced feeder. The specially optimized arc design of the slideway ensures smooth and reliable transportation. The lifting hopper is made of stainless steel. The hopper has thick walls and a thick bottom, and is lifted by double chains to meet the requirements of /pot to ensure safety. Safety requires that the motor and chain and other transmission parts have integral protective covers. Equipped with double upper and lower limit switches to facilitate the installation of two control systems on the elevator, one control system is installed on the control panel of the internal mixer
,
Single-screw extruder
Single-screw
Adopted A series of high-precision gear transmission boxes with hard tooth surfaces and thrust seats specially designed for single-screw rubber and plastic extruders. The front end of the output shaft is equipped with a thrust bearing to withstand the axial thrust of the screw during operation. The whole machine is small in size and has high load-bearing capacity. , smooth transmission, low noise, high efficiency
Equipped with energy-saving variable frequency motors and frequency converters that meet national environmental protection standards
The structure of the separated screw is characterized by the addition of a secondary screw edge in the melting section. , the main thread groove is divided into two parts, and solid-liquid phase separation is formed during the plasticizing process of the screw. All the solid phase materials remain in the solid phase groove, while the gas in the solid phase groove flows backward under the action of pressure. It is discharged in the middle and reduces the bubbles in the product. There are many structures of separate screws. In actual design and testing, our company believes that in terms of the convenience of machining and the use effect, the main and auxiliary thread lifts should be equal, and the liquid phase groove and solid phase groove width of the screw groove should be equal. Remaining unchanged, the depth of the solid phase tank gradually becomes shallower starting from the compression section, while the depth of the liquid phase tank gradually becomes deeper until the end of the homogenization section. This structure is beneficial to products with high transparency and raw materials with poor thermal stability. At the same time, the heat exchange area between the solid phase material and the inner wall of the barrel is increased. In addition, the separation screw design has strong adaptability to raw materials and needs to reasonably select the screw parameters according to the actual situation, including compression ratio, distribution of three stages, and position of the secondary screw edges.
The soft water circulation cooling system and the vacuum soft water pipe are separated from the machine body for easy cleaning and maintenance. The soft water pipe is connected to a high-pressure copper pipe and is controlled by a Taiwan Qiangshi automatic water control solenoid valve. A stainless steel needle valve controls the water flow in the large and small water tanks (made of stainless steel, Wall thickness), water pump, cooling main circulation water pipe are all made of stainless steel. The vacuum system has vacuum pump power. It is independent and external, easy to clean and maintain. It contains a vacuum chamber, a stainless steel vacuum tank, and a set of vacuum tanks with filters. Enlarged buffer tank.
The material of the barrel is nitrided, and its deep brittleness is not greater than grade. The screw barrel is water-cooled. The coiled copper tube has been strengthened and the manufacturing process has been improved. The copper tube hole welding nozzle is fully welded and reinforced with fixation to prevent water leakage here. The barrel is equipped with a stainless steel protective cover. The protective cover is required to be connected to the machine base. The barrel is equipped with exhaust, an external bell mouth is used for vacuuming, and a hard tube is used to connect the vacuum chamber to facilitate cleaning of materials and pipes.
The heating section adopts imported Omron dual-channel temperature control meter and high-precision solid-state relay using high-quality cast aluminum heater.
The hydraulic plate type automatic screen changing device consists of two double-station porous plates. The diameter includes a screen changer, a cast copper heater, a hydraulic station, and a hydraulic cylinder. The screen changer is connected with a hard pipe. The hydraulic station is connected to the host platform. into a whole.
Sheet mold
The hanger-type die adopts a special double-throttle design to make the thickness adjustment of the sheet more precise. Temperature control ℃ can accurately control the plasticizing process and the thickness and flatness of the plate. Effective discharge width, product width, product thickness, die head material steel, common zone heating, stainless steel heating rod die head flow surface hard chromium plating.
, Traction machine
Cooling traction and trimming device, traction motor power, pressure roller is a rubber roller, driving roller is a steel roller traction, traction roller diameter, effective lifting distance of the traction passive roller is, The two cutters on both sides can effectively cut off the waste material to make the sheet reach the required width. There are two spare ones. The total length of the bracket is divided into two sections. The front section can be moved forward and backward according to the calender. There is an automatic meter counter that can be set. Product length.
Three-roller calender
Using a double-casing spiral blade circuit, the surface temperature of the rollers is uniform, the temperature rises/cools quickly, and a large amount of cooling medium is not required. The surface of the roller is quenched, ground, hard chromium plated (the thickness of the coating is not less than .) and then mirror polished. The hardness reaches above. The roller surface runout is less than the surface temperature error and the error is within ℃. Comes with heating medium rotary joint and heat and pressure resistant hose.
The wheel set is positioned using a precision screw lift and its components. The central wheel is fixed, and the upper and lower wheel clearances are roughly adjusted by motors, manual fine adjustment, and left and right independent adjustment. It can achieve the purpose of rapid gap adjustment and high-precision fine-tuning at the same time. The high strength, high precision and optimized design of this mechanism are the core components to ensure the quality of the finished plate.
, Shearing machine
Maximum shearing width. Maximum thickness, shearing speed, times/minute. Shearing method: mechanical shearing, motor power. (Customized) automatic film feeding device, when the length is reached, the film feeding will stop. After cutting, the film will be automatically fed. The diameter of the film feeding roller, motor frequency conversion speed regulation, inverter counter, encoder, fixed length cutting Cut the length of the transition bracket and connect the traction and shearing machine.
, Conveyor belt conveyor motor line speed, the total length of the equipment is about meters, width . meters
, Hydraulic foaming machine
Features
.The button automatically rises, and when the pressure is released, the pressure is released ( sequence automatic control operation).
.Specially made rapid release valve, mold opening and lowering. The speed is extremely fast and can be adjusted freely.
.Rise quickly, maintain pressure for a long time, and the pressure will automatically increase when sulfur is added to ensure quality.
.The pressure relief speed and delayed mold opening after pressure relief can be adjusted according to the characteristics and thickness of the finished product. It is suitable for the development of new products and improves quality.
.Specially designed hot plate. Even heat.
, Various products with constant cross-section and continuous length. Such as tubes, plates, rods, sheets, wires, films, coatings of wires and cables, special-shaped materials, etc. Coloring, mixing, plasticizing, granulating and blending modification of plastics, etc. Extrusion + blowing extrusion blow molding hollow blow molding products extrusion + stretching extrusion tenter stretch film
Extrusion molding makes the polymer melt (or viscous fluid) in the screw of the extruder Or under the extrusion of a plunger, it is continuously formed through a die of a certain shape, and the resulting product is a continuous product with a constant cross-sectional shape.
The basic process of extrusion molding is that the screw rotates and continuously transports the plasticized material from the extruder barrel to a die (head) of a certain shape, so that it can be formed in a molten state, and then through traction The device is continuously pulled out of the die and cooled and shaped at the same time. , The key parts of the extrusion system are the screw + barrel, , Auxiliary machine head (die) shaping device, cooling device, traction device, cutting device, stacking or coiling device, and the feeding port is on the barrel, which plays the role of feeding. The feed port can be water-cooled to prevent premature heating of the polymer and enhance the conveying effect. The feeding part is used to transport materials to the hopper for continuous and even feeding, preheating, drying and mixing. , The main parameters of the screw are screw diameter, aspect ratio/, screw compression ratio, screw groove depth and, helix angle, thread edge width, etc., screw aspect ratio/ratio of the effective length and diameter of the screw working part. The main factor that determines the screw volume capacity affects the rate of heat transfer from the barrel wall to the material. The effective working length depends on how long the material goes through to reach the viscous flow state required for molding. Increasing the aspect ratio, improving the temperature distribution of plastics, making mixing more uniform, reducing leakage and backflow, and improving production capacity are the development directions. Generally. But it is too big to squeeze heat-sensitive plastic, and it is difficult to manufacture and install. The selection is based on the physical properties of the material and product performance requirements. Those that are difficult to process, such as fluorine-containing plastics, require a larger aspect ratio. The granules are smaller and the powder is larger.
, compression ratio is the ratio of the volume of the first screw groove in the screw feeding section to the volume of the last screw groove in the homogenization section. The function is to squeeze and exhaust air, which is generally used in plastic processing. The larger it is, the greater the extrusion effect on the plastic will be, and the greater its ability to remove air from the material. However, if it is too large, the mechanical strength of the screw itself will decrease. The main methods to obtain it are to use equidistant variable-depth screw grooves (the most commonly used) and equidistant-depth variable-pitch screw grooves. Variable depth and variable pitch grooves.
Delong produces EVA automotive interior sheet extruder | EVA plastic sheet extruder