The film blowing machine heats and melts the plastic particles and blows them into a film.
There are many types of blown film machines, such as PE, POF, PVC, etc.
The new material is blown out with new particles, the color is called, clean, and the bag is stretched well.
Some people also use recycled plastic bags to make particles. These particles are generally called old materials. When they are made into particles, they are usually gray. When making bags, they usually add pigments, making the bags unevenly colored, brittle and fragile. The price is also lower.
Although it is a recycled plastic bag, it is generally a waste bag in the bag making process and a garbage plastic in the usual sense is still very different.
Composition:
The composition of the film blowing machine consists of 1 motor motor, 2 screw and barrel, 3 die head, 4 inverter inverter, 5v board, 6 pairs of wheels, 7 smooth wheels, 8 pairs of wheels 2, 9 winding wind section
Raw material LLDPE and LDPE temperature is 160-180 degrees
HDPE temperature is 210-230 degrees
The most important thing about the blown film machine work is three factors.
One temperature (machine temperature, indoor temperature)
Double helix
Triple cooling system
Application:
The film blowing machine produces a film suitable for a variety of high-grade film packaging. The film is widely used for light and heavy packaging because of its good barrier property, preservation, moisture resistance, frost resistance, oxygen barrier and oil resistance. Such as a variety of fresh fruit, meat food, pickles, fresh milk, liquid beverages, medical supplies and so on.
But it is not made of garbage plastic, it is made of plastic pellets.
Correct use:
1. Check that the temperature is self-controlled and the heating appliance is in good condition. Pay attention to adjust the heating temperature of each point in time within the index range.
2. Check the traction speed and control the film thickness.
3. Observe and adjust the thickness of the film evenly, and the folding diameter conforms to the standard.
4. Check the air storage cylinder pressure, not too high, but there should be spare pressure.
5. Check and control the ratio of raw materials and mix well.
6. Check the raw materials for impurities. In particular, check the irons in time with a magnet.
7. Check the lubricating oil lubrication of the gearbox and air compressor cylinder.
8. Regularly check the temperature rise and mechanical transmission of each running motor.
Energy-saving retrofit application of Sanjing frequency converter on film blowing machine:
(1) Production process and production principle
The dried polyethylene particles are added into the lower hopper, and the weight of the particles itself enters the screw from the hopper. 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. Film blowing machine
(2) Main structure of film blowing machine
Mainly consists of extruder, head, die, cooling device, foam rack, herringbone plate, traction roller, coiling device, etc.. 1: Extruder, extruder is mainly composed of screw and barrel hopper. Deceleration and drive motor composition, the drive motor adopts electromagnetic speed control motor (also can be used with variable frequency ordinary motor), drive the reducer through the belt drive to make the screw rotate in the barrel; the plastic which melts the plastic particles of the hopper under external heating After three passes through the filter die from the die die 2: three-way, consisting of filter, filter plate, three-way gland three parts 3: die 4: cooling device, consisting of cooling air ring, duct, blower, etc. 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 main switch can control the fuselage and the three-way through the split button switch respectively, and the nozzles of each die are electrically heated. The key parts of the two sets of coils are automatically temperature-measured and automatically controlled by thermocouples. During normal production, the temperature can be automatically controlled. Ensure that the production process is stable and reliable. There are many types of blown film machines, such as PE, POF and so on.
The new material is blown out with new particles, the color is called, clean, and the bag is stretched well. Some people also use recycled plastic bags to make particles. These particles are generally called old materials. When they are made into particles, they are usually gray. When making bags, they usually add pigments, making the bags unevenly colored, brittle and fragile. The price is also lower.
(3) The film blowing machine has a purpose
Although it is a recycled plastic bag, it is generally a waste bag in the bag making process and a garbage plastic in the usual sense is still very different. The film blowing machine produces a film suitable for a variety of high-grade film packaging. The film is widely used for light and heavy packaging because of its good barrier property, preservation, moisture resistance, frost resistance, oxygen barrier and oil resistance. Such as a variety of fresh fruit, meat food, pickles, fresh milk, liquid beverages, medical supplies and so on.
Second, the transformation of the film blowing machine by the three crystal inverter:
(1) The requirements of the blown film machine system for the transformation of the frequency converter;
1. It can smoothly adjust the speed within a certain range, and adjust the speed of the main motor and traction motor to produce different specifications.
2, start, stop stable, because the plastic machine is a constant torque load, start and stop smoothly to avoid too much mechanical shock, on the other hand can also reduce the unqualified products during the start-up process.
3. The motor only needs to run in one direction.
4, stable performance, reliable work.
(2) Advantages of the transformation of the three crystal inverter
A. Energy saving: According to the running V/F curve of the inverter, the inverter is a constant torque output. Compared with other speed control systems, the average energy saving is more than 30%, and the energy saving effect at low speed is more significant. B. Improve product quality: The frequency conversion speed regulation performance is stable. C. Reduce the impact on the grid when starting, the starting current can be controlled within the rated current does not constitute a voltage shock. D. Reduce the impact on the machine when starting, and smooth start can extend the service life of the machine. E, meet the stepless speed regulation, the speed regulation is simple and convenient. F, strong protection.
(3) Setting of inverter parameters
F001---Acceleration time F002---Deceleration time
F031---No reversal F039---External start
F040---frequency given mode
Multi-layer co-extrusion blown film machine:
In order to meet the special functions of plastic film packaging materials in the production process, a variety of characteristic materials (such as breathable, waterproof, heat preservation, toughness, etc.) are blown and co-extruded to form a multifunctional plastic film, which has developed a lot. Layer co-extrusion blown film machine.
For example, Guangzhou Guoyan Machinery's three-layer co-extrusion blown film machine, five-layer co-extrusion blown film machine, etc. belong to such products:
Three-layer co-extrusion film blowing machine
Three-layer co-extrusion and blown production line adopts new high-efficiency low-energy extrusion unit, IBC bubble internal cooling system, ±360° horizontal traction system, photoelectric automatic correcting device, automatic winding and film tension control, computer screen automatic Advanced technologies such as control systems. Compared with similar equipment, it has the advantages of higher output, better plasticization, low energy consumption and simple operation. It completely solves the problems of film ruffle and winding size, and makes the product quality a new level. The produced film has high transparency, puncture resistance, high toughness, good low temperature hot cut property, good composite fastness and anti-curling property. The film is widely used for light and heavy packaging because of its good barrier property, preservation, moisture resistance, frost resistance, oxygen barrier and oil resistance. Such as a variety of fresh fruit, meat food, pickles, fresh milk, liquid beverages, medical supplies and so on.
Five-layer co-extrusion film blowing machine
The five-layer co-extrusion blown film unit is mainly used for resin with gas barrier properties such as HDPE, MHDPE LDPE LLDPE MLLDPE PA EVOH, and the film is mainly used for packaging of heavy packaging, high-grade food bags, vacuum packaging bags, liquid packaging bags, etc. The material is packaged for the purpose of preserving, preserving, preserving, airtight and extending the shelf life.
Daily inspection and equipment maintenance of the film blowing machine:
1. Check that the temperature is self-controlled and the heating appliance is in good condition. Pay attention to adjust the heating temperature of each point in time within the index range.
2. Check the traction speed and control the film thickness.
3. Observe and adjust the thickness of the film evenly, and the folding diameter conforms to the standard.
4. Check the air storage cylinder pressure, not too high, but there should be spare pressure.
5. Check and control the ratio of raw materials and mix well.
6. Check the raw materials for impurities. In particular, check the irons in time with a magnet.
7. Check the lubricating oil lubrication of the gearbox and air compressor cylinder.
8. Regularly check the temperature rise and mechanical transmission of each running motor.
Film blowing machine features:
The group is suitable for blowing plastic films such as low density polyethylene (LDPE), high density polyethylene (HDPE) and linear low density (LLDPE). It is widely used in civilians such as fruits, food, clothing, textiles, strains, daily necessities, etc. Internal and external packaging of industrial products.
Performance characteristics:
1. The screw adopts the most advanced alloy spraying technology. After precision machining, the hardness is higher, the corrosion resistance is better, and the service life is longer. It is 2~3 times of the life of the nitriding treatment screw;
2. The long diameter to diameter ratio of the screw is large, the plasticizing ability is strong, the temperature distribution is uniform, the automatic temperature control, and the blown film bright and uniform product has good performance;
3. The whole machine is compact in structure, stable in operation, single-arm structure, economical and practical, and the traction device is integrated and can be adjusted and lifted automatically;
4, using advanced frequency conversion technology, high efficiency and energy saving;
5, the variety of curls can be arbitrarily selected;
6, can be configured according to user needs rotating machine
