Double-Screw Extruder Operation Manual

Proper operation of twin-screw extruders is a crucial factor in ensuring an efficient and stable extrusion process. Operators must undergo inherent training and become familiar with the equipment's structure and control systems. Before starting up, a thorough check is mandatory: confirm that each barrel's heating temperature meets the process requirements, inspect that the cooling water and lubrication systems are unobstructed, ensure that fasteners are not loose, and clean the feed port and downstream equipment.

Operations must be initiated in a strict sequence: first, start the system (such as lubrication and cooling), then start at low speed.Twin-screw Extruder Main UnitObserve the current and torque for normalcy. Subsequently, activate the feeding system and precisely set and control the main and side feeding rates as required. During operation, continuously monitor the main unit's current, melt pressure, and temperature distribution, and use the temperature control module to ensure precise temperature control across all areas. Pay close attention to the exhaust port to prevent material overflow, and adjust process parameters (such as screw speed, feeding amount, and temperature distribution) appropriately based on the melt state to optimize blending and plasticizing effects and increase output. Stoppage procedures are equally important: first, the feeding system should be stopped. Once the material in the standby cylinder is mostly emptied, gradually reduce the twin screw speed to the minimum, then shut down the main unit. Immediately after, disconnect the heating power supply, ensuring that the cooling water reaches the appropriate temperature before stopping.

Daily maintenance should not be overlooked either: Equipment should be cleaned regularly, especially the screws, barrels, and nozzles. Simultaneously, worn parts such as screw components and seals should be inspected and replaced, and the transmission system should be lubricated and maintained as per regulations. In the event of abnormal conditions (such as unusual noise, significant fluctuations in current or pressure, or failure of temperature control), the machine should be immediately shut down for inspection. If necessary, please contact us promptly. Longwell Equipment Suppliers Technical Support Services