Brief Description:The conical twin-screw granulator, as an ideal equipment for the crushing, mixing, shearing, and polymerization of high and ultra-high viscosity materials, is becoming increasingly common in the daily production of rubber, silicone, hot melt adhesives, and more. Due to differences in product manufacturing processes, the selected discharge methods also vary.
The conical twin-screw granulator, as an ideal equipment for the crushing, mixing, shearing, and polymerization of high and ultra-high viscosity materials, is becoming increasingly common in daily production of rubber, silicone, hot melt adhesives, and more. Due to differences in product manufacturing processes, the discharge methods chosen can vary, generally including hydraulic tilting discharge, ball valve bottom discharge, and screw discharge.
The conical twin-screw granulator is mainly composed of five major parts: the kneading section, the base, the hydraulic system, the transmission system, and the electrical control system. The hydraulic system is operated by a hydraulic station to control the large oil cylinder, achieving opening and closing functions. It also controls the cylinders to perform actions such as tilting and lid opening, with detailed parameters customizable according to user requirements, making operation convenient and reliable. The transmission system consists of an electric motor, a reducer, and gears, with the motor matched according to the equipment model.
Due to factors such as component dimensional tolerances, assembly processes, and long-term operation under heavy load conditions, shaft wear in conical twin-screw granulators frequently occurs. Once shaft wear happens, it inevitably leads to unstable blade operation, causing vibrations or unexpected shutdowns. At this point, we need to carry out repair treatments. Today, I will briefly introduce the selection and application of shaft wear repair techniques.
Surface oil-baking treatment: Use oxygen and acetylene to bake off the oil contamination on the surface of the kneader shaft until there are no more sparks and the surface is dry.
2. Pre-machine and roughen the worn parts of the shaft, then clean the shaft surface with anhydrous ethanol and let it dry.
3. Mix the Soray carbon nanopolymer material in the correct ratio until it is uniform and free of color differences, then apply the mixed material to the shaft surface with a thickness slightly greater than the single-side wear amount.
4. After the material has cured, machine it to the required dimensions to complete the repair.
This technology is similar to a cold welding technique, which does not generate high temperatures during the online repair process, thus effectively protecting the equipment from damage. The repair process is not limited by the amount of unilateral wear on the shaft. Additionally, the material possesses excellent bonding properties, compressive strength, wear resistance, and comprehensive mechanical advantages such as elastic deformation that metals do not have, ensuring the effective use and longevity of the repaired part.
Maintenance of conical twin-screw granulator:
1. It should first be placed in a well-ventilated location to ensure that the heat generated by the motor can dissipate, thereby extending its lifespan.
2. Observe the gear oil of the reducer daily, and the oil level should be maintained at the midpoint of the oil window. Lubricating oil should be regularly added to the bearings to ensure lubrication between them; check the cooling water of the reducer daily, and during operation, the cooling water of the reducer should be in a slow flow state (the water flow must not be too rapid or the water pressure too high, to avoid detaching the brazed cooling pipes inside the box).
3. Regularly check the screws; after using a new plastic pelletizing machine for 1 hour, use tools to tighten the screws of the moving and fixed blades, enhancing the fixation between the blades and the blade holder.
4. To ensure the sharpness of the cutting edge, the knife should be regularly checked and maintained to keep it sharp, thereby reducing unnecessary damage to other components caused by a dull or defective blade.
5. When replacing the blades, the gap between the moving blade and the fixed blade: for 20HP and above, the gap can be appropriately increased as the recycled material gets thinner.
6. Before the second start, the remaining debris in the machine room should be cleared to reduce the starting resistance;
7. The inertia cover and pulley cover should be opened regularly to clean the dust outlet below the flange, as the powder discharged from the plastic pelletizing machine room can enter the shaft bearings.
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).
