Use of appropriate core holding device ensures no core damage, saving of loading unloading time and uniform winding / unwinding operation.

‘ARVIND’ offers varieties of devices according to requirement of the duty conditions like position load, speed, core width etc. Our product range covers, almost all the requirements of the industry.

Differential Shaft is a sophisticated winding shaft for slitter re-winder machine, used as duplex shaft winder (centre winding type).

Sizes

Load upto 2 tons
Suitable for Core l.D. dia 3”, 4”, 6”, 8” (metric size and special sizes also produced)
Length as required
Speed upto 1000 mtrs/min
Suitable for core materials: Paper, Steel, Thermoplastics
Minimum core width 20 mm

General Materials of Construction

Pipe - Steel
End Generals - Steel - simple or hardened
Cam - Brass
Lugs - Hardened Steel / Rubber

This is a lug type shaft but core holding is initiated mechanically and not pneumatically. This shaft mainly consists of slotted pipe, steel lugs, brass cam, ratchet etc.

The shaft is capable of taking any challenge arising out of heavy load and speed. It is possible only because of positive gripping and core centering achieved without any extra efforts with the help of cam/lug design. It is very much advantageous with cores having uneven inside diameter. Key and alien-cap bolt prevent any shearing of journals - pipe assembly.

Economic model for Re-winder shaft having all the advantages like slippage, accommodating gauge variation, smaller core width etc. With only limitation of time needed for repositioning of the core. This shaft is suitable for Paper Cores.

• Suitable for core I.D. 3”, 4” & 6”
• Length as per requirement
• Individual Quick Locks are also available having width of 50 mm, 75 mm, 100 mm   and 300 mm. The bore of Quick Lock is tailor made.

• In case of failure of bladder, though having least chance, shaft can hold the core till    the process complete.
• Damaged bladder can be changed easily, even on the machine.
• Expanded area is available almost all over the length of pipe body. Very small width   of the cores is possible to hold.

This is a very commonly used shaft. It mainly consists of slotted pipe, journals to suite users machine, lugs, rubber bladder and non-return valve.

This type of shafts are suitable for both unwinding and winding stages. It can accommodate single core, multi cores of the width more than 150 mm. Type of pipe material, lug material are decided based on duty conditions like load, speed and core material. The limitations are, it can not take care of gauge variation or individual core speed variation since slippage is not achieved and core width less than 1 50 mm.

This type of shaft mainly consists of slotted base pipe, metal leaves with knurling/serration, rubber bladder, non-return valve and suitable journals.

This type of shaft can be used at unwind station, but mainly used at rewind stage for advantages like:

• Narrow width of core
• To prevent damage to thin cores (100 % support available to the core ID.)
• At times core-less winding is also possible

This also has a limitation to accommodate gauge and speed variation.

Sizes

Air chuck is a pneumatically expandable assembly. Expanded Jaws hold Core without slippage. Air chuck converts, existing expandable shaft for core l.D. 3” into shaft suitable for core ID. 6”. Internal bore of the chuck is supplied to suit existing collapse diameter of expandable shaft.

• A mechanical device which is spring loaded.
• Expands clockwise and anti-clock wise.
• Due to spring collapses when machine stops.
• Jaws are rubber coated to prevent any damage to core ID.
• Jaw width, simple fitment with through bore or additional collar fitment supplied per   customers requirement.

1. Pad Type Shaft

A lug type Air Expandable Shaft. Larger lugs (pad) are used to achieve better grip & more reel weight capacity. The pad material is special abrasion resistant rubber.

3. Doctoring Shaft

This smaller width shaft can be air expandable or mechanically expanded.
Can also be with longer end. (Cantilever type fitting)

4. Mechanical Adaptor Shaft (Pneumo Mechanical Shaft)

It is a mechanical attachment fitted on ‘ARVIND’ lug type air expandable shaft suitable for core ID. 3”, just fitting two adaptors on one shaft subsequent larger size core is possible to process. For example, existing shaft suitable for core I.D. 3” core I.D. can be easily converted into shaft suitable to hold core I.D. 6”. Obviously it is very economical.

5. Reverse Working Shaft (Bladder Less But Pneumatic)

This mechanical shaft requires compressed air to achieve collapse condition. It has advantage like positive gripping, core centering and safest working.

• All accessories manufactured in CGS (Metric) and FPS (Imperial) sizes.
• Information given in the catalogue is only for the guide line and we reserve our right for any    change in specification without any prior notice.
• Teflon® anywhere mentioned here is a registered trade mark of M/s DuPont.