Mica band heaters
Formed around barrels, cylinders, dies and pipework where efficient circumferential contact heating is required.
Industrial contact heaters
MICA
HEATERS
Versatile and economical heaters manufactured in band, flat plate, U-shaped, box and specially formed constructions.
One construction, many forms
HEAT SHAPED AROUND
THE APPLICATION
Mica heaters provide direct, responsive contact heating for cylindrical, flat and formed metal surfaces.
A resistance element is supported and electrically insulated by layers of mica, then enclosed within a protective metal sheath. The assembly can be produced cylindrical, flat or formed around the component that needs to be heated.
Although the finished shapes may look very different, the same proven mica-insulated construction allows Hotset UK to adapt dimensions, voltage, wattage, power distribution, terminations and mechanical features to the application.
Replacing an existing heater?
Send us its dimensions, voltage, wattage and termination details together with a drawing, photograph or sample. Include the position of every hole, slot, cut-out and fixing feature.
Available forms
MICA HEATER CONFIGURATIONS
The construction is selected and formed to place heat against the working surface while accommodating the geometry of the machine.
Flat plate heaters
Flat heating elements for platens, tooling, sealing equipment, trays and other level metal surfaces.
U-shaped heaters
Formed around three faces of a component to provide concentrated heating with access from one side.
Box heaters
Folded constructions designed to heat several faces of a block, die, manifold or specially shaped component.
Ring and formed heaters
Circular, curved and specially formed designs for components that cannot be served by a standard band or flat heater.
Drawing-led designs
Bespoke heaters incorporating the shape, folds, openings, fixings and electrical layout required by the equipment.
Industrial applications
WHERE MICA HEATERS ARE USED
Mica construction is used wherever controlled heat must be applied economically and directly to a metal component.
Plastics processing
Barrels, dies, adapters and tooling used for injection moulding and extrusion.
Packaging and sealing
Heated jaws, sealing bars, plates and formed components used in production machinery.
Tooling and dies
Direct heating of metal tooling, blocks, plates and specially shaped production components.
General industry
Maintenance replacements, process equipment and OEM machinery requiring a bespoke contact heater.
Installation matters
GOOD CONTACT SUPPORTS
GOOD HEAT TRANSFER
A mica heater performs best when its heated area makes close, even contact with the component. Poor fit, contamination, distortion or inadequate clamping can create local hot spots and shorten heater life.
Confirm the finished shape
Measure the actual working component and identify bend directions, radii and installation clearances.
Keep the surface clean
Remove contamination and damaged material that could prevent even contact or trap heat.
Maintain secure contact
Use the intended clamps and fixings, checking them as the assembly completes its initial heat cycles.
Preparing an enquiry
WHAT DO WE
NEED TO KNOW?
These details allow us to evaluate the heater layout, electrical loading, terminations and finished construction.
Choosing the construction
MICA OR CERAMIC?
Mica offers economical, responsive contact heating and considerable freedom of shape. Where higher operating temperatures or additional external insulation are required, ceramic construction may be more appropriate.
Read our mica or ceramic guide →
Need a mica heater?
Request a quotation →
SEND US YOUR SPECIFICATION.
We can review a drawing, photograph or existing sample and help establish the construction required.