How to determine if the heating system of the PE blown film machine is working properly?

PE blown film machine, as an important plastic processing equipment, plays an important role in modern industry and daily life. Through continuous technological innovation and process optimization, the PE blown film machine can produce high-quality and high-performance polyethylene films to meet diverse application needs. In the future, with the increasing awareness of environmental protection and technological progress, PE blown film machines will develop towards more energy-efficient, environmentally friendly, and intelligent directions, providing higher quality film products for various industries.

Equipped with an automated control system, it can achieve precise control over the production process. For example, automatically adjusting parameters such as extruder speed, inflation ratio, and traction speed to ensure the stability of film quality. In addition, it also has fault diagnosis and alarm functions, which can timely detect and solve problems in the production process, reduce manual intervention, and improve production efficiency and product quality.

How to determine if the heating system of the PE blown film machine is working properly?

TEMPERATURE DISPLAY

Observing temperature controller: The heating system of PE blown film machine is usually equipped with a temperature controller, which displays the set temperature and actual temperature of each heating zone. If the actual temperature can remain stable within the set temperature range and the fluctuation is small, it indicates that the heating system is basically normal. Generally speaking, temperature fluctuations during normal operation should be within ± 5 ℃. If the actual temperature differs significantly from the set temperature, or if the temperature fluctuation range is too large, there may be a problem.

Check the temperature sensor: The temperature sensor is a critical component for measuring temperature, and if it malfunctions, it can cause inaccurate temperature display. You can check if the sensor connections are loose and if there are any signs of damage. If you suspect that there is a problem with the sensor, you can use a professional temperature measuring instrument, such as an infrared thermometer, to conduct on-site measurements of the heating zone and compare the measurement results with the temperature displayed on the temperature controller. If the difference between the two is significant and other factors are excluded, it is likely that the temperature sensor is faulty.

heating element

Check the appearance of the heating coil: The heating coil is a common heating element. Check its appearance for damage, deformation, discoloration, and other conditions. If there are obvious burn marks or cracks on the surface of the heating coil, it may affect its heating effect and even cause safety issues such as short circuits.

Detecting the resistance of the heating coil: Use a multimeter or other tools to measure the resistance value of the heating coil. Under normal circumstances, the resistance value of the heating coil should be within a certain range of its rated resistance value. Generally speaking, a deviation within ± 10% is considered normal. If the resistance value differs significantly from the rated value, it indicates that there may be a fault in the heating coil, such as an internal open circuit or short circuit.

Operation status of heating system

Listen to the sound of the heating system: When the heating system is running, carefully listen for any abnormal noise or vibration. Under normal circumstances, the heating system operates smoothly with a steady sound. If there is a sharp, frictional or other abnormal sound, it may be due to poor contact between the heating element and other components, or a malfunction of auxiliary equipment such as motors and fans.

Feeling the uniformity of heating: After running the blown film machine for a period of time, touch the heating areas of different parts with your hand (be careful not to burn) to feel whether the temperature is uniform. If the local temperature is too high or too low, it indicates that there may be uneven heating in the heating system. This may be due to improper distribution of heating elements, blocked air ducts, or malfunctions in the temperature control system.

product quality

Observing the quality of the film: Abnormal operation of the heating system may affect the quality of the film. If the heating temperature is insufficient, the plastic raw materials may not be fully plasticized, resulting in a rough and granular surface of the film, or a decrease in the strength, toughness, and other properties of the film. If the heating temperature is too high, the film may appear yellow, burnt, and even affect its tensile properties and transparency.

Alarm Message

Pay attention to equipment alarm prompts: The control system of modern PE blown film machines usually has a fault alarm function. If the heating system malfunctions, the equipment will issue corresponding alarm messages to prompt the operator of the specific type and location of the fault. Operators should promptly check the alarm information and carry out corresponding inspections and repairs according to the prompts.

PE blown film machine is a specialized equipment for producing polyethylene (PE) film, widely used in packaging, agriculture, construction, medical and other fields. PE film has become an indispensable material in modern industry and daily life due to its excellent physical properties, chemical stability, and economy. The PE blown film machine produces films of different thicknesses, widths, and properties by heating and melting polyethylene particles and blowing them into shape.

The PE blown film machine heats polyethylene plastic particles to a molten state through an extruder, and then extrudes them into a tubular film through the head. At the same time as extrusion, a certain pressure of air is introduced into the tube to inflate the tubular film to the desired size under the action of air pressure. The blown film is cooled and shaped by a cooling device, and then pulled to the winding device by a traction device to complete the production of the film.