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  • What should we pay attention to when operating the extruder?
    What should we pay attention to when operating the extruder? Jul 19, 2019
    1. Before starting the extruder, check the inside and outside of the barrel, whether there are foreign objects on the upper and lower sides of the hopper, check whether the fastening bolts of each part are loose, whether the safety cover is firm, and whether each button switch is in the correct position Then in each lubricating section. Add enough lubricant to clean the device. 2. When preparing to turn on the extruder, please inform the people around the equipment. 3. Start the screw rotating motor at low speed and check whether the working motor pointer of the main motor swings normally. If the equipment works abnormally or the screw operation is unstable, please stop immediately and ask relevant personnel for repair. 4. Screw running test shall not exceed 3 minutes. After all normal installations, install the mold and install the mold's attachment bolts. Before use, apply a layer of molybdenum disulfide or silicone oil to facilitate disassembly. 5. In the initial stage, the screw has the lowest working speed, and the feeding times are small and uniform. Check whether the working ammeter pointer of the motor used to drive the screws is abnormal. 6. After normal production of the extruder, the operator should always check the temperature changes of the bearing components. When checking the temperature of the motor and each bearing part, lightly touch the inspection area with the back of your finger. When the device is running, do not touch any rotating parts with your hands. 7. When removing and installing screws and molds, it is not allowed to hit the parts directly with a heavy hammer. If necessary, hardwood should be removed or installed by tapping. 8. When cleaning materials left on screws, barrels and molds, they must be cleaned with a bamboo or copper knife and brush. Do not scrape debris with a steel knife or use fire to burn parts. 9. When handling the extruder failure, do not drive the extruder. When the extruder screw rotates and adjusts the mold, the operator must not face the extruder barrel to avoid accidents. 11. Remove the screws after parking and apply a layer of anti-rust oil after cleaning the remaining material. If it is not used for a period of time, it should be packaged and hung vertically in a dry and ventilated place. 12. If the extruder and molding die are not used for a long time, it should be coated with anti-rust oil, and the inlet and outlet holes should be sealed to prevent foreign matter from entering.
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  • Modern use of plastic extruders
    Modern use of plastic extruders Jul 19, 2019
    Plastic extruder is a technology that dates back to the late 18th century. It is responsible for plastic parts such as pipe and wire insulation. This technology dates back to the end of the 18th century, but it still affects us every day. In 1797, Joseph Branmah first patented the process for the first time because it was originally used to actually manufacture lead pipes. Similar to the plastic process, this process involves heating the metal, pressing it into a mold to form a shape, and then hardening it. Soon, plastic entered the equation, which gave rise to the plastic extruder process we rely on today. Plastic extruders typically utilize tiny plastic particles or chips that melt at high temperatures and slowly pour into a mold. Early extrusion techniques developed by Branmah involved using a plunger to press the material into a die, while modern plastic extrusion techniques are slightly different. Today, modern plastic extruders utilize heated screw feeders that quickly and efficiently push plastic pellets from the hopper through the barrel and into the mold. There are various forms of plastic extruders to achieve different goals. Although there are many different types of extrusion, the main methods include sheet extrusion and tube extrusion. Sheet extruder is used for products of plastic sheet or film. After extrusion molding, it is drawn through a cooled calender roll set and cooled. Many times, a technique called coextrusion is used to add more than one layer on top of the base extrusion layer. Coextrusion is a simple process where multiple extruders are used to melt and stably add different plastics to a single extrusion die. This gives the extrudate many specific characteristics including, for example, a softer feel, a gripped surface, a matte finish, and the like. The extruded sheet also undergoes thermoforming multiple times, which involves heating the sheet until it becomes soft again and then shaping it into another shape by using a mold. Many times, a sheet is pressed into a mold using a vacuum (this is called vacuum forming). This process places the extruder sheet in its more basic orientation and bends it to create complex shapes, such as computer cases, displays, general plastic products, and more. Although plastic extrusion is used to produce an extremely wide range of products from pipes, pipes and seals to plates, rails, rods and profiles, a large amount of plastic is used to make extrusions with the proper properties. For example, extruder pipes to be used in high-temperature or potentially corrosive applications may require completely different plastics than general-purpose pipes. Given the large number of plastics on the market today, this provides a wide range of solutions for plastic parts, parts and products almost everywhere.
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  • Plastic extruder manufacturer
    Plastic extruder manufacturer Jul 19, 2019
    Plastic extrusion is produced by a method called plastic extrusion. Plastic extrusion is a manufacturing process in which the original plastic material is melted and then formed into a continuous profile. Plastic extrusion can produce various types of different items, especially suitable for manufacturing window frames, pipes, pipes and weather strips. In order to extrude plastics into various forms, a thermoplastic raw material known as a resin in the extrusion industry and materials in the form of beads are charged into a gravity feed hopper, which is installed on the top of the extruder barrel . Before the resin is loaded into the hopper, UV inhibitors and additives are usually mixed into the resin. The resin is dropped into a barrel equipped with a screw, which can be rotated from any speed to 120 rpm. The screw pushes the resin or plastic bead along the barrel heated to the required temperature, which can range from 200 degrees Celsius to about 275 degrees Celsius. Control the temperature of the bucket along its length so that the beads move along it and the temperature will rise. This gradual heating of the resin gradually melts and more evenly melts as it is forced through the barrel, minimizing the risk of overheating, which in turn causes polymer degradation. If excessive heat is generated, a cooling fan can be used to reduce the temperature of the barrel. The plastic leaves the screw from the front of the barrel and passes through the screen assembly to remove any contaminants that may be present in the molten plastic. The screen is reinforced by a crusher plate, which also helps to generate support pressure in the barrel, which is necessary to uniformly mix and melt the polymer. When the molten plastic passes through the partition, it enters the mold. The mold imparts the final shape or contour to the product and must be designed to allow the molten plastic to flow uniformly from the cylindrical contour to the final contour form of the product. As long as the contours are continuous, you can use this process to create a large number of different shapes and forms. The final heated product was then cooled by drawing through a water bath. Compared to some metals, plastics dissipate heat about 2,000 times slower because plastics are very effective thermal insulators. Once the product has cooled, it can be cut to a controlled length or wound for later use. Want to know about high efficiency plastic extruder, please feel free to contact us!
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