What are the operating skills of the three-layer co extrusion blown film machine?

The three-layer co extrusion blown film machine mainly uses an extruder to feed molten plastic particles into a diffuser, and then extrudes them outward through the extrusion port. A set of die heads is installed on the extrusion port, which can adjust the width and thickness of the film as needed. After being cooled by a cooling roller, the extruded plastic film is further pulled by a traction roller and finally rolled up by a winding device.

The extrusion mechanism of the three-layer co extrusion blown film machine is the core of the entire equipment. Composed of three extrusion mechanisms, each responsible for extruding different types of plastic pellets. Among them, the first layer material is usually high-density polyethylene (HDPE) as the inner layer of the composite film, the second layer material is low-density polyethylene (LDPE) in the middle, and the third layer material is regenerated polyethylene (LLDPE) as the surface layer of the composite film. These three layers of material are melted and extruded into the mold head, forming a continuous film.

What are the operating skills of the three-layer co extrusion blown film machine?

Cleaning and maintenance: Before operating the three-layer co extrusion blown film machine, cleaning and maintenance work must be carried out first. Clean the key parts of the blow molding machine, such as the mold head, extruder, and cooling roller, to ensure that there is no accumulation, so as not to affect the quality of the film.

Preliminary preparation: Before operation, prepare plastic particles and auxiliary materials to ensure normal feeding. Check whether the temperature, speed and other parameters of the extruder meet the process requirements.

Start the equipment: Start the extruder and cooling rollers, and wait until the temperature reaches the set value before proceeding to the next step of operation. At the same time, start the cutting machine to ensure stable and neat cutting.

Adjusting the machine: Adjust the height and angle of the machine to meet the work requirements. At the same time, check whether the transmission devices of each part are normal to ensure safe operation.

Operation control: According to the process requirements, adjust the parameters of the extruder such as speed, temperature, and pressure to ensure the uniformity and stability of the extrusion film. Control the blowing volume and cooling roller speed, adjust the air volume and temperature, and ensure that the width and thickness of the film meet the requirements.

Final inspection: After the blowing of the film is completed, check the quality of the film in a timely manner, including its thickness, width, and surface smoothness. If there are any problems, adjust the process parameters or equipment settings in a timely manner.

The membrane system is a crucial part in controlling the thickness and width of the membrane. It consists of the die head after the extrusion mechanism, the ice water circulation system, the concave convex roller, and other parts. The molten plastic extruded by the extrusion mechanism enters the ice water circulation system through the mold head, and the cooling rate of the molten plastic is controlled by adjusting the temperature and speed of the ice water, thereby controlling the thickness and width of the film. The function of the concave convex roller is to further adjust the thickness of the film and ensure the smoothness and quality of the film.

The layer co extrusion blown film machine can produce films of various materials, such as LDPE, LLDPE, HDPE, etc., to meet the needs of different customers for films. The three-layer co extrusion blown film machine has a user-friendly design and is easy to operate. Operators only need to set relevant parameters through the touch screen control panel to complete the debugging and operation of the machine. The three-layer co extrusion blown film machine adopts energy-saving design and has lower energy consumption. In addition, due to the use of extrusion technology, there is no need to use solvents, adhesives, and other chemical substances, which is pollution-free to the environment.