Production process structure of the film blowing machine
Let's share with you the production structure of the film blowing machine: One: production process and production principle Medical Ppe, medical gloves,medical mask,breath machine Jiangmen soundrace electronics and technology co.,ltd. , https://www.soundracegroup.com
The dried polyethylene particles are added into the lower hopper, and enter the screw from the hopper by the weight of the particles themselves. When the pellets are in contact with the helical bevel of the thread, the rotating bevel faces the plastic to produce a thrust perpendicular to the beveled surface, and the plastic particles are Moving forward, during the transition, due to the friction between the plastic and the screw, the plastic and the barrel, and the collision between the particles, it is also gradually melted due to the external heating of the barrel. The molten plastic is filtered by the machine head to remove impurities from the die die, cooled by the air ring, inflated through the herringbone plate, the traction roller, and wound to wind the finished film into a cylinder.
Second: the main structure <br> mainly consists of extruder, head, die, cooling device, foam stand, herringbone plate, traction roller, coiling device and so on.
1: Extruder, the extruder is mainly composed of screw, barrel feeding hopper, deceleration and driving motor. The driving motor adopts electromagnetic speed regulating motor (also can be used with variable frequency ordinary motor), and the speed reducer is driven by the belt drive to make the screw in the barrel. Rotating motion; the plastic that melts the hopper plastic pellets when heated externally is squeezed from the die die through three-pass filtration
2: Three-way, consisting of three parts: filter, filter plate and three-way gland.
3: Die,
4: The cooling device is composed of a cooling air ring, a duct, a blower, and the like.
5: Traction, consisting of main components such as traction frame, herringbone plate, traction roller, take-up mechanism and traction motor
6: Electrical control part, the general unit is equipped with an organic group operation cabinet. The total button is connected to the main power supply to open the main switch of the motor. The splitter switch can be used to control the fuselage and the three-way, and the die of each die is heated. The two sets of coils adopt thermocouple automatic temperature measurement and automatic temperature control. During normal production, the temperature can be automatically controlled to ensure stable and reliable production process.
Three: Operating procedures <br> Preparation and precautions before starting:
1. Check whether the installation work of the unit is installed as required, and check that the bolts are tightly fastened.
2. Check and add the gearbox and the lubricating oil in the air compressor to check the lubrication of each mechanical transmission component.
3. Check the power supply and electrical parts, and each machine should have a safety ground.
4. The barrel is not filled with plastic, filled with plastic and the temperature is not up to standard. It is forbidden to start.
5. Check that there should be no foreign objects in the material, and there should be no iron filings or other unqualified materials in the raw materials.
6. The material requirements should be dry, otherwise pre-drying should be carried out.
7. Check that the heating system and temperature measurement system of the unit are in good condition.
8. During the startup process, irrelevant personnel should leave, to prevent the material from overheating and rushing out of the burn. To prevent the belt and the mixing tube from being injured, it is necessary to prevent the hair and clothing from being taken up.
Normal driving steps:
1. Heat the extruder body, head, die, and control the temperature of each point within the index.
2. If driving after a long stop, the heating temperature of each point must reach a constant temperature of 10-30 minutes after the temperature is reached. If the vehicle is parked within half an hour, no constant temperature is required.
3. Start the air compressor and stop it when the cylinder pressure is 6-8kg/cm.
4. According to the film diameter, thickness requirements and extruder production capacity, the traction speed and the bubble diameter are estimated.
5. After the temperature reaches the requirements of each point, wear the labor insurance products and start the tractor, blower and extruder in sequence.
6. When the die discharge is uniform, the glove can be slowly pulled and the tube blank is closed. At the same time, the end of the tube blank is closed, and the air intake regulating valve is slightly opened to blow a small amount of compressed air from the center hole of the core rod. Carefully guide the bubble holder, the herringbone plate, and insert the traction roller and guide roller until the coil is taken.
7. Check the thickness and width of each film and adjust it to meet the requirements.