band heaters - rotfil.com · for band heaters, for further reduction of heat radiation losses and...

Band Heaters

Mica Insulated Band Heaters (HM) Ceramic Insulated Band Heaters (KHM)

Rectangular Band Heaters, Strip, Ring and Flat Heaters Protection Housings (WSM)

Cast Heaters, Band, Flat or Custom Insulating Pads for Band Heaters

Contact Accessories, Connection Boxes, Clamping Devices

Band Heaters, PDF-BAN-009-E-1/12

Mica-Insulated Band Heaters (HM)

Ordering informationNo. of piecesDiameter x width

Model

Tension (Volt)Any convenient voltage under the precondition that it should be technically feasible.

TemperatureMaximum temperature of heating band surface 350 °C.

DimensionsMinimum diameter 50 x 20 mm (inner diameter x width), increasing in mms. (special models possible on request forsmaller dimensions). Maximum dimensions practically unlimited, depending on the technical requirements.

Tightening

Power (Watt)Any convenient wattage up to 3.2 W/cm² of heating area.(In special cases, higher power density is possible.)

Connection

UseFor heating machines, shapes and tools of the plastic processing industry. Technical process-oriented applications.

Type of connection (if necessary, specify connecting cable length)Heat-protection housing / heat conduction plate.Sketches or drawings are necessary for band heaters with perforations and definite accessory constructions.

For contact accessories, cable fittings, clamping devices, fixed cable and braided connections, DRGSL (heat-resistant,flexible insulation with metal braided cable housing of any convenient length, connection boxes and types according tothe band heater dimensions, power and type of power supply line: see corresponding pages.

Tension (Volt) / Power (Watt)

Tight screw joints with the help of tightening straps and tightening bolts with inner hexagonal screws depending on theband heater dimensions. In M5, M6 or M8. If necessary, with spring plate expansion compensation according to

Winded heating coil, mica insulation housed in galvanized surface-treated sheet metal. Can also be manufactured inoval or conical shape (special shapes possible) on request. Can be spread, with recesses, with perforations, in multiple-part construction, with insulation or heat-resistant jacket. For continuous heat flow over perforations or depressions inthe objects to be heated, the band heater can be fitted with heat conduction plates made of copper, aluminum or brass.For heat transfer, the band heater must be pressed against the object to be heated. The standard model of the bandheaters is not liquid-proof. Testing according to VDE 0720.


Mica-Insulated Band Heaters (HM) - Typical Constructions

HM, type 2, standard construction with connection box

HM, type 3, standard

construction with connection box and sensor

hole

HM, type 6, two-part construction

HM, type 7, two-part

construction

HM, type 9, special

construction

HM, type 1, standard

construction with contact

socket

HM, standard construction

HM, type 4, special obliqually-cut construction

HM, type 5, special

construction with flat side and opening

HM, type 8, special two-part construction


Tension (Volt)

Connection

Spiral-shaped heat conductor, drawn into ceramic casings, arranged one after another in heating strands, executedpartially in box form, housed in jacket with insulation padding. It can also be manufactured with recesses andperforations, if necessary. Parts exposed to heat made of stainless steel, optionally with heat protection housing.Flexible band heater models through cut embossing teeth of housing. Direct heat conductor connection with the help ofspecial screws insulated with ceramics. Current bridges in stainless steel, high performance heaters of large dimensionsin multiple part construction. Can be manufactured in oval or conical shape upon request (special shapes possible).

No. of pieces / diameter x width / Volts / Watts / if necessary, specify connecting cable length), heat-protection housing /heat conduction plate.Sketches or drawings are necessary for high-performance band heaters with perforations and construction of definiteaccessories / fittings.

Please follow the assembly instructions.

Ceramic-Insulated High-Performance Band Heaters (KHM)

Assembly

Holding clamps according to TA data sheet, special models possible according to specifications.

Tightening

Fittings for thermal sensors

In the standard model, the connection boxes extend with tangential cable introduction over the total width of the bandheater. A shortened connection box seated on a definite axial position is possible under observation of technicalfeatures. Construction of the connection boxes, clamping and shutter fittings, perforations and bores in radial as well asaxial position is possible, depending on the requirement.

TemperatureMaximum temperature of heating band surface 650 °C.

Model

Tight screw joints with the help of tightening straps and tightening bolts with inner hexagonal screws depending on theband heater dimensions. In M 5 or M 6. If necessary, with plate spring expansion compensation according to Information

Construction characteristics.

Any convenient voltage under the precondition that it should be technically feasible.

Power (Watt)Any convenient wattage up to 8 W/cm² of heating area.

Connection boxes with tension releaser, optionally with DRGSL (heat resistant, insulated, metal braided cable) of anyconvenient length, special lug in stainless steel.

Ordering information

mm 33 / 48 / 63 /78 / 92 / 107 / 122 / 137 / 152 / 167 / 180 / 195 / 210 / 225 / 240 / 255 / 269 / 284 / 299 / 314 / 329 / 344/ 357 / 372 / 387 / 402 / 417 / 432 / 446. Execution / model for 3 - phase connection possible from 92 mm width

Minimum diameter 80 mm (inner diameter), increasing in millimeters (special models for smaller diameters possible onrequest ). Maximum dimensions practically unlimited, depending on the technical requirements.

For heating machines, shapes and tools of the plastic processing industry. Technical process-oriented applications.Use

Dimensions

Dimensions, width


KHM, type 3, special construction with 3 heating zones

KHM, type 6, standard

construction with connection

box and metal braided cable

KHM, standard construction

KHM, type 5, standard construction with open connection box

KHM, type 2, segment

KHM, standard construction

KHM, type 1, standard

construction with open

connection box

Ceramic Band Heaters (KHM) - Typical Constructions


Minimum diameter 80 mm (inner diameter).

Model

Dimensions, widthIntermediate widths from 38 mm to 501 mm in phased dimensions.

Manufactured from galvanized, surface-treated sheet metal, special models in stainless steel. Heat protection housing,2-part construction, hinged with the help of joints, clamping with quick fastening shutters. Function as heating / coolingcombination with air entry and outlet nozzles. Heat protection housing through cut embossing teeth in flexible execution.Heat protection housing of larger dimensions possible in multiple part construction.

In the standard model, the connection boxes extend with tangential cable introduction over the total width of the bandheater. A shortened connection box located on a certain axial position is possible under observation of the technicalfeatures. The construction of the connection boxes, clamps and shutter fittings, perforations and bores in radial as wellas axial position is possible, depending on the requirement. The section of the heat protection housing in the area of theconnection boxes is insulated by the band heater on account of the electrical connections. For the purpose of access,the tightening clamps of the band heaters must be arranged on the side of the hinged or removable section of the heatprotection housing. The radial division of the heat protection housing can be arbitrary.

Ordering information“Heat protection casing with ... mm thick insulation” must be specified along with the concerned band heater data.

Execution in 3-phase connection is possible from a width of 97 mm onwards.

Construction characteristics

Heat Protection Housing (WSM)UseFor mika or ceramic high performance band heaters, to reduce heat radiation losses.

Heat Protection Housing with Insulation (WSMI)

Construction of connection boxes, clamps and shutter fittings, hinges, perforations and expansions is possible in radialas well as axial positions, depending on the requirement. The section of the insulated heat protection housing in thearea of the connection box is insulated by the band heater on account of the electrical connections. For the purpose ofaccess, the clamps of the band heaters must be arranged on the side of the hinged or removable section of the heatprotection housing with insulation jacket. The radial division of the insulated heat protection housing can be arbitrary.

Insulation jacket:10, 20 or 30 mm thick.

Instructions on construction

The heat protection housing with insulation jacket is assembled along with the actual band heater as one unit. Asubsequent fitting of band heaters with insulated heat protection housing is possible under certain conditions. The bandheaters can be removed for the purpose of replacement.

For band heaters, for further reduction of heat radiation losses and for limiting the heat protection housing surfacetemperature to about 65 °C (measured at the band heater with 30 mm insulation jacket and about 10 mm air column forcylinder temperature of 245 °C).

Dimensions

ModelManufactured from galvanized, surface-treated sheet metal, special models in stainless steel. Flexible executionthrough cut-embossing teeth. This cut embossing teeth lies only in point-form at the circumference. Standard model intwo-part construction with joint and fast clamping shutter. Special execution as heating / cooling combination with airentry and outlet nozzles.

Dimensions

Use

Ordering informationThe notation “with heat protection casing” must be specified along with the concerned band heater data.

Attachment

Minimum diameter 80 x 30 mm (inner diameter x width), maximum dimensions practically unlimited, depending on thetechnical requirements. Multiple-part construction possible for relatively large band heater diameter.


WSM-KHM, type 5, heating/cooling

combination

WSM-HM, type 2, special obliqually-cut construction with connection box type KO-11 and openings

WSM-HM, type 3, with thermoprotection type

TA-1, contact box type KO-11B and clamps

WSM-KHM, standard construction

WSM-KHM, type 2, with thermoprotection type TA-1 and clamps

WSM-HM, standard construction

WSM-HM, type 1, with thermoprotection type

TA-1, contact box type KO-11B and fast

clamps

WSM-KHM, type 6, heating/cooling combination

WSMI, protection

housing with insulation

jacket

Heat Protection Housings - Typical Constructions

WSM-KHM, type 4, heating/cooling combination


Type KO-STE (Spec. Sheet C16): 10A, 250V, for Band Heaters larger than dia. 75 mm

Contact Accessories (KO)

Type KO-11B (Spec. Sheet

C22): 16A, 250V, for Band Heaters larger

than dia. 75 mm

Type KO-11 (Spec. Sheet C22): 16A, 250V, for Band Heaters larger than dia. 100 mm

Type KO-11A (Spec. Sheet C22): 16A, 250V, for Band Heaters dia. 40-99 mm

(Spec. Sheet C21): 16A, 250V, Silicon Plug

for Heat

Type 102.0 (Spec. Sheet C15): 10A,

250V, Plug for Heat 250°C


Connection Boxes (KA)

Type KA-12: 16A, for Band Heaters dia. 100 mm or over

Type KA-13: 16A, 2-poles, for Band Heaters dia. 75

mm or over

Type KA-13/4: 4x10A, 4-poles, for Band Heaters dia.

75 mm or over

Type KA-16: 40A, 2-poles, for Band Heaters dia. 100 mm or over

Type KA-16/3: 3x30A, 3-poles, for Band Heaters dia. 100 mm or over


Type KA-18: 30A, 2-poles, for Band Heaters dia. 150

mm or over


150 mm or over

Type KA-21: fixed cable connection, only for flat heaters or surfaces

Type KA-22: fixed cable connection, only for flat

heaters or surfaces

Type KA-19: 40A, 2-poles, for Band Heaters dia. 150 mm or over





150 mm or over


150 mm or over


150 mm or over


Type TA-4

Closing Devices (SA)

Type SA-530, for Band Heaters dia. 150 mm or

over

Type SA-1042, for Band Heaters dia. 250

mm or over

Type TA-1: with dia. 3/8"Type TA-2: with dia. 1/4"Type TA-3: for M14x1,5Type TA-6: for M12x1Type TA-7: for M10x1

Type SA-411

Type TA-5

Types Abb.1 and Abb.2

Sensor Clamping Devices (TA)


Recommended Watt Density Limits Applications Required details for a quotationCast Aluminium 4.7 W/cm² • Extruder Barrels • Inside diameterCast Bronze 7 W/cm² • Extrusion Die Heads • Outside DiameterTemperature: • Blow Moulding machines • Width of heaterCast Aluminium 400 °C • Packaging • Termination positionsCast Bronze 650 °C • Food warming • Termination type

• Glue pots • Air/Water cooled• Rubber presses • Wattage and Voltage• Window machines• Transfer machines

Cast Heaters, in Aluminium or Bronze

• Simple to fit• Available with cowls for maximum energy

Cast Aluminium and Cast Bronze heaters offer optimum heat transfer directly to the contact surface.

These heaters are usually custom designed in house using state of the art cad ware alongside many years experience to obtainmaximum heater life. Every shape and size can be manufactured in our modern patternshop and foundry, before being fullymachined in our machine shop prior to termination at final assembly. There are many terminations available from metric toAmerican threads, high temperature leads to high temperature plug and socket arrangements.

These units are designed and manufactured using the highest quality heavy walled alloy tubing for maximum thermal shockresistance. They are available with straight tube connection or threaded connectors. These units offer many advantages including:

They can be designed as heater only, water/oil cooled or air cooled. Insulated or un-insulated cowls are available in sheet steel orCast Aluminium.

Liquid cooled applications

• Heaters must be disconnected from supply before any maintenance is carried out.• Electrical connections should be periodically checked to prevent arcing which could damage the heater terminals• Heater clamping arrangements should be checked regularly and re-tightened when required.

• Water fittings must be free from leaks, threaded connectors are the most common way of ensuring this.• Heater must be seated correctly and securely clamped to the extruder barrel.• After initial warm up to operating temperature, the heaters should be isolated from the electricity supply and re-tightened tocompensate for thermal expansion.• All connections should be made with suitable high temperature wiring. Terminal enclosures can be provided up to IP65 for easeof wiring and operator safety. All units must be adequately earthed.

Air cooled applicationsOur experience has evolved from the very first finned heaters supplied to the extruder industry into complete insulated units whichcan also be supplied with top quality blowers ready to install straight onto the extruder barrel. The design offers the maximumsurface area for optimum cooling efficiency and minimum energy loss. Our design team have the capability to manufacturecomplete lines for renewal of existing air cooled lines or for the conversion of older water cooled extruders. Our facility allows us tomanufacture a wide range of sizes to suit the smallest extruder up to the largest. Cowls can be insulated or un-insulated inAluminium coated mild steel or Stainless Steel, they can also be supplied in Cast Aluminium or Cast Bronze for areas where amore robust unit is required.

Maintenance

Installation Recommendations• Surface to be heated must be clean from contamination, smooth and compatible to the machined surface of the heater.

• Maximum thermal conductivity• Uniform heating of contact surface• Fast, effective cooling control

• Excellent mechanical strength• Extremely reliable unit


JEKA GmbH ROTFIL srlKalterer Straße 27 Via Praglia 15D-64646 Heppenheim I-10044 Pianezza TODeutschland / Germany ItalyT. +49-(0)6252-95920-0 T. +39-011-9683-111F. +49-(0)6252-95920-95 F. [email protected] [email protected] www.rotfil.com

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band heaters - rotfil.com · for band heaters, for further reduction of heat radiation losses and...

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