Expandable Mandrels
Expandable Mandrels
Expandable Mandrels
Range of Expandable Mandrels - ROUND STYLE For Heavy Duty Winding Machines
Customers often need to wind foil or wire onto a mandrel which can be expanded during the winding
process and then collapsed to allow the finished coil to be removed. Iron cores or laminations can then be
inserted later in the production process.
Shown below are some examples of the previous designs we have made.
As can be seen in the photos, the expanding mandrel are finished with aluminium bars and wood mounted
on the outer diameter. Each mandrel has a built in gearbox which is driven by a pneumatic hand tool, which
expands the mandrel for winding and then collapses it for easy removal of the coil at the end of the winding
process. Larger versions can be provided with an expanding and contracting mechanism that is powered by
hydraulics.
TYPICAL TECHNICAL CHARACTERISTICS.
Diameter
Length
Min
Max.
140
200
1100
250
425
1800
400
650
1800
500
820
2000
820
1300
2000
However, please do note that this is only a representative range, and nearly 90% of these mandrels are
made to customer order and specifications.
We aim to be much more than a machinery supplier. Our team has a vast range of winding experience and is able to
offer help and advice on all aspects of coil winding, from tooling design to machine choice and set-up.
Unit 5L, Delta Drive, Tewkesbury, Glos. GL20 8HB. United Kingdom.
Range of Expandable Mandrels - RECTANGULAR STYLE For Heavy Duty Winding Machines
The new generation of expandable mandrels provide the possibility of winding
with rectangular, circular or ovoid shape coils, without changing mandrel.
Allows winding with round & flat / profile wires as well as foil.
Over the main tile the customer can assemble supplements with geometries
according to the application.
Simple manual opening & can be mounted in cantilever or between points.
Main tile
Face plate
Adjustment
End cap
Both the main body andnut
tiles are made of
We aim to be much more than a machinery supplier. Our team has a vast range of winding experience and is able to
offer help and advice on all aspects of coil winding, from tooling design to machine choice and set-up.
Unit 5L, Delta Drive, Tewkesbury, Glos. GL20 8HB. United Kingdom.
Item
Units
Winding Length - WL
Total Length (distance between centres) - TL
OD Min
OD Max
No bars / arms
Max finished coil Weight (loading)
Qty required
(mm)
(mm)
(mm)
(mm)
(No.)
(KG)
Mandrel 1
Value
Mandrel 2
Value
Mandrel 3
Value
Mandrel 1
Value
Mandrel 2
Value
Mandrel 3
Value
Rectangular Mandrels
Item
Units
mm.
mm.
mm.
min110
mm.
min 75mm
(ton)
Finally regarding connection to your machine, we would need a drawing or photo to confirm the cost of a custom adapter or we
can just leave as round ends, depending if your machine has a standard chuck system.
For further information, the links below show typical mandrels in action.
Video showing open/close action of typical mandrel- http://www.coilwindingmachines.eu/heavy_duty_winding_machines/expanding_mandrel_video.html
Typical mandrel on a machine-http://www.coilwindingmachines.eu/heavy_duty_winding_machines/stripfoil_winding_machine_with_tig_welding_system_video.html
Video open/close action of large mandrel http://www.coilwindingmachines.eu/heavy_duty_winding_machines/expanding_mandrel_to_hold_coil_during_winding_video.html
Video rectangular mandrel - coil unloading http://www.coilwindingmachines.eu/heavy_duty_winding_machines/square_expanding_mandrel_video.html
Video rectangular mandrel - foil winding http://www.coilwindingmachines.eu/heavy_duty_winding_machines/compact_foil_winding_machine_video_tour.html
We aim to be much more than a machinery supplier. Our team has a vast range of winding experience and is able to
offer help and advice on all aspects of coil winding, from tooling design to machine choice and set-up.