Brief Description:The pelletizing method of the twin-screw modifying granulator is that the plastic, in a molten state, is extruded and scraped off by blades, then solidified through circulating cooling water. After being processed by a high-speed dewatering machine, it can effectively remove the moisture from the finished pellets.
Characteristics of the twin-screw modifying pelletizer:
1. This unit can be equipped with corresponding special screw designs and different configurations according to the varying needs of users. It is widely suitable for color mixing and pelletizing of plastics, plastic filler modification, and recycling of sprues into pellets. The high-torque, hard-faced gearbox ensures stable operation and noise-free performance. The screws and barrels are specially hardened on the surface, providing excellent mixing performance and wear resistance.
2. The special exhaust design effectively removes moisture and fumes, making the output pellets more stable and solid, ensuring excellent performance of the pellets.
3. Using variable frequency control can save more than 20% of electricity.
4. The pelletizing method of this unit involves extruding the plastic in a molten state, which is then scraped off by blades and solidified through circulating cooling water. After being dehydrated by a high-speed dewatering machine, it effectively removes moisture from the finished pellets, resulting in good drying effects. The pelletizing process is simple to operate, highly automated, dust-free, low-noise, and produces high-quality, aesthetically pleasing pellets.
The arrangement principles of twin-screw modifying and pelletizing machine:
The speed of the screws at the engagement point is opposite, with one screw pulling the material into the engagement gap and the other pushing the material out of the gap. As a result, the material transfers from one screw to the other, advancing in an "∞" shape. Due to the very small gap in the engagement area and the opposite velocity directions of the threads and grooves, there is a high shear rate, which provides excellent self-cleaning, effectively scraping off any adhered material on the screws. This results in a very short residence time for the material, making the engineering plastic pelletizer primarily used for compounding and pelletizing.
2, Melting Section: Toothed discs and kneading discs can be used to accelerate the melting and mixing of materials. In practice, forward conveying elements are generally used to separate the mixing elements to avoid creating a large temperature gradient in the melting zone.
3, Mixing Section: Distributive Mixing: Using narrow elements with smaller stagger angles; Dispersive Mixing: Using wide elements with larger stagger angles, left-handed conveying kneading discs, or multi-toothed discs.
4. Venting Section: Before the vent, a reverse-threaded element is usually set to block the melt, allowing the material to fully fill the screw groove. For extruders used for devolatilization and drying, multiple vents should be set, and thus, an alternating use of reverse kneading disks and reverse-threaded elements can be adopted. In the middle of the venting section, large-pitch conveying elements with deep grooves are typically installed.
5. Melt Conveying Section: Toothed disc elements can be used to improve the homogenization quality of the melt, while small pitch screw elements are employed to enhance the forward conveying capacity.
Here are the precautions for using a twin-screw modifying pelletizer:
1. Always pay attention to the changes in the machine body temperature. When the strands no longer stick to a clean hand upon touch, the temperature should be increased immediately until the strands stick to the hand, which is considered normal.
2. If the bearing area of the gearbox feels hot or is accompanied by noise, the machine should be stopped for timely inspection and oil replenishment.
3. If the bearing areas at both ends of the main unit's bearing housing become hot to the touch or produce unusual noises, stop the machine for inspection and apply grease. During normal operation, grease should be added to the bearing housing every 5-6 days.
4. Pay attention to understanding the operating patterns of the machine; for example, the temperature and rotational speed. Adjustments should be made promptly based on the situation. 。
5. When the machine body operates unstably, attention should be paid to checking whether the coupling fit clearance is too tight, and it should be adjusted looser in time.
Nanjing Xintuo Intelligent Equipment Co., Ltd. was established on May 29, 2020, with Zhou Xianting as the legal representative. The registered capital is 10 million RMB, and the unified social credit code is 91320113MA21LF2H92. The company is located in the Baima Town Industrial Concentration Zone, Lishui District, Nanjing City. It belongs to the other manufacturing industry. Its business scope includes: Permitted projects: import and export of goods; import and export of technology (projects that require approval by relevant departments can only be carried out after obtaining such approval, specific business items are subject to the approval results). General projects: sales of intelligent material handling equipment; research and development of machinery and equipment; general equipment manufacturing (excluding special equipment manufacturing); specialized equipment manufacturing (excluding licensed specialized equipment manufacturing); sales of metal products; wholesale of electronic components; sales of instruments and meters; sales of artificial intelligence hardware; processing and sales of mechanical parts and components; general component manufacturing; sales of plastic products; production and sales of Class I medical devices; sales of Class II medical devices; sales of health supplies and disposable medical supplies; sales of special labor protective equipment; technical services, technical development, technical consultation, technical exchange, technology transfer, and technology promotion (except for projects that require approval, activities can be conducted independently according to the business license). The current operating status of Nanjing Xintuo Intelligent Equipment Co., Ltd. is active (in operation, open, registered).
