What Are The Main Factors That Affect The Load-bearing Capacity Of The Air Expanded Shaft

The air expanable shaft is a special rewinding and unwinding shaft, which is mainly used for the winding and unwinding equipment of coils. It expands and shrinks the shaft diameter by inflating and deflating, thus facilitating the loading and unloading of coils. The load-bearing capacity of an inflatable shaft varies depending on a number of factors, mainly including the following:

1) Material factors:
Aluminum alloy material: Generally speaking, the bearing capacity of aluminum alloy inflatable shaft is relatively weak, usually around 300kg. Its advantages are light weight and corrosion resistance, and it is often used in occasions where the bearing requirements are not high and the weight is sensitive, such as some light printing, coating and other equipment.
Steel material: The steel inflatable shaft has a strong bearing capacity and can bear a weight of more than one ton. It is suitable for heavy machinery, large printing equipment, papermaking machinery and other industrial fields with high requirements for bearing capacity. For example, in large paper rewinding and unwinding machines, the steel inflatable shaft can reliably support and transfer heavier paper rolls.
2) Shaft diameter factor:
In general, the larger the shaft diameter, the higher the load carrying capacity of the inflatable shaft. A larger shaft diameter means more material is used to support and distribute the load, and is better able to withstand external pressure and weight. In practical applications, if you need to carry heavier materials or coils, you need to choose an inflatable shaft with a larger shaft diameter.
3) Structural design factors:
Key inflatable shaft: The inflatable shaft of this structure achieves close binding with the reel through the expansion of the key bar, and its bearing capacity mainly depends on the strength and number of key bars. Generally speaking, the key inflatable shaft with a large number of key bars and high strength has a relatively strong bearing capacity. It is suitable for the rewinding and unwinding operations of various coils, such as film, paper, metal foil, etc.
Plate inflatable shaft: The expansion part of the plate inflatable shaft is composed of a series of tiles or slats, and its bearing capacity is related to the material, thickness, quantity and other factors of the tiles or slats. Compared with the key inflatable shaft, the plate inflatable shaft has a larger contact area and can distribute the load more evenly, so it is more used in some occasions with high requirements for bearing uniformity.
Slip type inflatable shaft: This kind of inflatable shaft can achieve different speeds within a certain range, and is suitable for occasions with high requirements for tension control. Its load-bearing capacity is related to the structural design of the shaft, the material and number of friction plates and other factors. In normal operation, the slip differential inflatable shaft needs to transmit torque and load-bearing weight through the friction force of the friction plate, so the performance of the friction plate has an important impact on its load-bearing capacity.

How the pneumatic inflatable shaft roller works:
When the reel core needs to be locked, the shaft is inflated through the connected air source, so that the key strip, aluminum tile or rubber on the outer surface of the shaft expands evenly, so as to lock the reel core tightly, once the inflation is completed, the shaft can start to work, when it is necessary to discharge, just press the sliding air core on the air nozzle to degasrate, and the drum core can be easily released.

The main advantages of the inflatable shaft:
1) Short inflating operation time:
The separation and placement of the shaft from the paper core or other material takes a very short time, such as 3 seconds or less, to complete the inflation and deflation process.
This efficient inflation allows the inflatable shaft to quickly switch between coils or materials during the production process, increasing production efficiency.
2) Paper core placement is simple:
By inflating and deflating the action, it is easy to move and fix the paper core or other material at any position on the shaft surface.
This flexibility allows the shaft to be used in a wide range of production environments.
3) Cost-effective:
The design of the inflatable shaft is designed for the actual work needs, and it can be applied to various types of coils such as thickness, thinness, width and narrowness.
In the process of use, the inflatable shaft can reduce manual operation time and material waste, and reduce production costs.
4) Long service time and simple maintenance:
As a mechanical component, the inflatable shaft has a fixed specification and interchangeability for each part in its construction, making repair and maintenance easy and convenient.
At the same time, the service life of the inflatable shaft is long, which can reduce the frequency and cost of replacing parts.
5) Wide range of applications:
As an independently designed part, the inflatable shaft is available in a variety of specifications from 1 inch to 12 inches, and the length and size are determined by the actual needs of the customer.
All slitting, printing, rewinding, coating, laminating, bag-making, papermaking and other process equipment or other related center winding machinery can be applied to the inflatable shaft.

When using an inflatable shaft, you need to pay attention to:
1) Make sure that the compressor that provides air pressure is in a stable state, and install a filter between the compressor and the inflatable shaft to prevent impurities from clogging the air pipe and causing air leakage.
2) The direction of air entry should be perpendicular to the shaft to avoid damaging the valve.
3) When exhausting, you must use a standard exhaust port and avoid using sharp tools such as hammers to prevent air leakage.
4) It is recommended to install pressure gauges and pressure control devices to control the air pressure within a suitable range.
5) Be careful during operation to avoid damaging the air valve, if you need to replace the valve or internal failure needs to be disassembled, please contact a professional for operation.

General maintenance steps required after the use of the inflatable shaft for slitting machine:
1) Storage environment
Dry and dust-free: The inflatable shaft should be placed in a dry, dust-free place to avoid damage caused by moisture and dust.
2) Cleaning
Cleaning inside and outside the shaft hole: pay attention to the cleaning of the inside and outside of the shaft hole, regularly clean the dust and dirt on the surface of the inflatable shaft, and maintain its surface finish.
Check for oil and water leakage: stop cleaning after application, so as to check the application of the inflatable shaft in time, especially the oil leakage, water leakage and electricity leakage of the machinery.
3) Lubrication status
Regular inspection: Regularly check the lubrication status of the inflatable shaft to ensure that the lubricating oil is sufficient and the oil quality meets the requirements.
Replace the lubricating oil: Change the lubricant regularly according to the manufacturer's recommendations to keep it running smoothly.
4) Axial force and air tightness
Check the axial force and air tightness: Check the axial force and air tightness of the inflatable shaft to ensure that the gas does not leak. If a leak is found, the seal should be replaced or repaired in time.
5) Part status
Check the parts: check whether the parts of the inflatable shaft are in good condition, and replace them in time if there are damaged or seriously worn parts.
6) Cooling measures
Installation of the cooler: The inflatable shaft will generate heat during the working process, so it is necessary to take appropriate cooling measures, such as installing a cooler, etc., to prevent the temperature from being too high and affecting the performance and life of the inflatable shaft.
7) Follow the operating procedures
Safe use: When using an inflatable shaft, the manufacturer's operating procedures and safety requirements should be followed to ensure safe use.
Avoid overloading: Do not overload the inflatable shaft to avoid damage to it.
8) Regular inspection and maintenance
Regular inspection: Regularly inspect and maintain the inflatable shaft, find problems in time and deal with them, and ensure its long-term stable operation.
9) Other precautions
Consistent placement: Ensure that tools, workpieces, and accessories are evenly placed, and that lines and pipes remain intact.
Oil quality requirements: do not add unclean oil when refueling the machine to ensure the normal operation of the machine.
 

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