pneumatic expanding shaft from Sunrise Group (Dongguan) Industrial Co., Ltd is one of the most competitive products in the industry. It is made of the finest raw materials that not only meet with the rigorous quality and safety standards but also meet the application needs. It delivers great benefits to customers with longer service life, stable performance, strong usability, and wide application.
We seek to establish long-term business relationships with clients and partners, as evidenced by the repeat business from existing clients. We work collaboratively and transparently with them, which allows us to resolve issues more effectively and to deliver exactly what they want, and further to build a large customer base for our Sunrise brand.
At SUNRISE, customers can get customized pneumatic expanding shaft. The MOQ is required, but negotiable according to the specific condition. We also provide customers with the highly efficient and reliable delivery service, ensuring that the products arrive at the destination on time and without any damage.
Lug and Leaf Type Air Shaft Technical Information
What is an Air Shaft?
Air Shafts are used in the manufacturing processes for fitting into a core onto which materials such as paper, card and plastic film are wound. An Air Shaft is designed so that, on fitting into a core, it can be readily expanded, thereby achieving a quick and firm attachment, it may also be easily deflated to facilitate easy withdrawal of the shaft after winding of product is complete. Their efficient design makes them ideal for mounting onto bearing housings to enable the winding or unwinding of rolls of stock material with the minimum of equipment down time. The advantage of using an Air Shaft is its ability to grip the core, without damage, whilst providing a positive interface to control the web via motors & brakes. Air Shafts are available as either Lug Type (with bladder down the centre) or Strip Type (bladders on the periphery of the shaft)
Lug Type Air Shafts
Lug type Air Shafts are the most popular and versatile of the types of Air Shafts. They are available in sizes ranging from 1.5"mm to 6", manufactured in Aluminium, Steel and Carbon Fibre where applicable. Shafts are bespoke and manufactured to the customer’s requirements to suit new or existing machinery. They are economical to repair and maintain, with a wide range of spares held on-site for immediate despatch.
Air Shaft Applications
Applications for Air Shafts generally fall into the following uses:-
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Continuous Core |
Cantilever Air Shaft |
Multi-Slit Air Shaft |
| For standard unwinding & rewinding applications. Lugs are spread apart, symmetrically along the length of the Air Shaft body | Ideal for Narrow slitting or single cores. Makes handling of reels easier on changeover. | Overlapping/meeting lugs are used to supply continuous gripping for multi-slitting applications |
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Duplex Slitting | ||
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A pair of shafts employed in tandem winding reel alternatively. Load on shafts are reduced by 50%, eliminating interleaving | ||
Construction of Lug shaft| key type air shaft
A Lug type Air Shaft can be best explained as metal tube with slots cut out of it with a sealed rubber tube inside which expands to push out Rubber or metal lugs which grip the core. The journals are fitted in each end of the tube to suit the machine dimensions. The diagram below shows the general parts used in a Lugshaft:-
This Leaf shaft can also used for coreless applications where there is a requirement to wind the material directly on to the shaft. The standard leaf shaft design is modified to incorporate a bar along the length of the shaft to trap the web.
Sunrise air Shafts are used in the manufacturing processes for fitting into a core onto which materials such as paper, card and plastic film are wound. An Air Shaft is designed so that, on fitting into a core, it can be readily expanded, thereby achieving a quick and firm attachment, it may also be easily deflated to facility easy withdrawal of the shaft after winding of product is complete. Their efficient design makes them ideal for mounting onto bearing housings to enable the winding or unwinding of rolls of stock material with the minimum of equipment down time. The advantage of using an Air Shaft is its ability to grip the core, without damage, whilst providing a positive interface to control the web via motors & brakes. Air Shafts are available as either Key/Lug Type (with bladder down the center) or Board/Leaf Type (bladders on the periphery of the shaft)
Monopodium board type air shaft feature:
- Expands instantaneously for fast roll mounting.
- Grips cores securely without core or roll damage.
- Used for unwind or rewind positions.
- Optional web tail gripper.
- Manual or automatic rotary union air supply.
- Positive collapse for quick roll removal.
- Positive drive and tension control.
- Reliable performance.
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Manufactured to your specifications to suit your equipment.
What is an Air Shaft?
Air Shafts, also commonly known as Air Bars or Air Mandrels, are used in the manufacturing processes for fitting into a core onto which materials such as paper, card and plastic film are wound. An Air Shaft is designed so that, on fitting into a core, it can be readily expanded, thereby achieving a quick and firm attachment. It may also be easily deflated to facilitate easy withdrawal of the shaft after winding of product is complete. Their efficient design makes them ideal for mounting onto bearing housings to enable the winding or unwinding of rolls of stock material with the minimum of equipment down time. The advantage of using an Air Shaft is its ability to grip the core, without damage, whilst providing a positive interface to control the web via motors and brakes. Air Shafts are available as either Lug Type or Key Type
Air Shaft / Air Bar Applications
Application for Air Shafts & Air Bars generally fall into the following
uses:-
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Continuous Core |
Cantilever Air Shaft/ Air Bar |
Multi-Slit Air Shaft/ Air Bar |
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|
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For standard unwinding & rewinding applications. Lugs are spread apart, symmetrically along the length of the Air Shaft body |
Ideal for Narrow slitting or single cores. Makes handling of reels easier on changeover. |
Overlapping/meeting lugs are used to supply continuous gripping for multi-slitting applications |
|
Duplex Slitting |
||
|
|
||
|
A pair of shafts employed in tandem winding reel alternatively. Load on shafts are reduced by 50%, eliminating interleaving |
||
Key type |Lug type air shaft
The Key type air shaft is suitable for a full range of converting and web production operations, with a fixed leaf design for greatest core and web concentricity. It is ideal for core or coreless winding, and features a 360¡ã radial expanding grip. Its rugged construction and design is available for any diameter or length, in steel, aluminum or lightweight carbon, with special designs available for heavy duty and extra lightweight applications. Shaft weights for your specific application are available upon request.
Construction of a key type air shaft
The air shaft is formed by the shaft head, shaft body, key, airbag, air injection port.
Board type | Leaf type air shafts
Board type air shaft introducing foreign advanced production equipment and fabrication technology, using imported airbag , shaft head for the high quality steel products with Blackening process, Attribute value using excellent aluminum and hard oxide, use convenient and long operating rudiments life . When using ,match with our company’s professional configuration of the aerate gun filling gas for the nozzle jet ,to make the shaft of off-axle appearance uniform expansion ,thereby lock nitrogen-treated barrel , when unloading ,press on deflated mouth to deflated ,then nitrogen-treated barrel can be unloaded.
Construction of a board type air shaft
The air shaft is formed by the shaft head, shaft body, key, airbag, air injection port.
The difference between key type inflatable shaft and board type inflatable shaft
Under normal circumstances, the key strip inflatable shaft is mainly used for unwinding materials, and the slat inflatable shaft is mainly used for winding materials. The requirement for unwinding is usually not high, as long as it can hold the tube core tightly; while for rewinding, it is different. During the rewinding process, as the diameter of the rewinding material increases, the shaft will bear more and more force. The larger, that is, the larger the winding diameter, the greater the bearing strength. At this time, if a keyed inflatable shaft is used, then the force acting on the tube core is completed by the keys on the shaft body. If the force is over Larger, it will cause the die to deform, because the key bumps form individual contact points; while the plate-type inflatable shaft is different, and the contact area with the die is large, forming a large circle that contacts the die. The contact surface and strength issues cause the die to deform.
If you require any assistance with your application our team of experienced Sales Engineers will provide a comprehensive on-site service, to survey the requirements and recommend a suitable solution.
