Furnaces with Radiation Heating up to 1400 °C

Bogie hearth furnaces offer a whole series of advantages in firing, sintering and tempering in production.
The bogie can be loaded outside the furnace. If multiple bogies are used, one bogie can be loaded
while the other is in use in the furnace. Useful accessories like multi-zone control to optimize the
temperature uniformity, controlled cooling systems to shorten process times to the fully automatic
system with motorized bogies and bogie exchange provide for the perfect adaptation of these
furnaces to production process. A combi furnace version with debinding
package for debinding and sintering in a single process is also possible.

• Tmax 1280 °C, 1340 °C or 1400 °C
• Double-walled housing with rear ventilation, provides low shell temperatures
• Swing door hinged on the right side
• Heating from five sides (four sides and bogie) provides for a good temperature uniformity
• Bogie heating receives power via blade contacts when driven in
• Heating elements mounted on support tubes provide for free radiation and long service life
• Bottom heating protected by SiC tiles on the bogie providing level stacking surface
• Multi-layer insulation consisting of lightweight refractory bricks backed by microporus silica insulation
• Self-supporting and long-life ceiling construction with bricks laid in arched
• construction, for models up to 1340 °C or as fiber insulation
• Roof made of high-quality fiber material for models with Tmax 1400 °C
• Bogies freely movable with rubber tires
• Adjustable air inlet damper
• Manual vapor vent on the furnace roof
• Over-temperature limit controller with manual reset for thermal protection class 2 in
• accordance with EN 60519-2 as temperature limiter to protect the furnace and load

Additional equipment

• Customized dimensions
• Fiber insulation for short heating time requirements
• Bogies with flanged wheels running on rails for easy and precise movement of high loads or complex kiln furniture
• Electric chain-driven bogie in combination with rail operation for smooth movement of heavy loads
• Bogie running on steel wheels with gear rack drive, no rails in front of the furnace necessary
• Different possibilities for an extension to a bogie hearth furnace system:
  • Additional bogies
  • Bogie transfer system with parking rails to exchange bogies running on rails or to connect multiples furnaces
  • Motor-driven bogies and cross-traversal system
  • Fully automatic control of the bogie exchange
• Electro-hydraulic lift door
• Customized kiln furniture
• Motor-driven exhaust air flap, switchable via the program
• Controlled cooling system with frequency-controlled cooling fan and motorized exhaust air flap
• Multi-zone control adapted to the particular furnace provides model for optimal the temperature uniformity
• Commissioning of the furnace with test firing and temperature uniformity measurement
• (also with load) for the purpose of process optimization
• Debinding packages with passive safety concept
• Thermal or catalytic exhaust cleaning systems
• Process documentation and control with Controltherm MV software package for the basic
• furnace or Nabertherm Control Center (NCC) for monitoring, documentation and control for use of Debinding Package II

Our top-loading furnaces are perfectly suited for firing, sintering or tempering of long, heavy products.
Charging is mostly carried out with the help of an overhead crane. Heating from all sides and from the
bottom provides for an good temperature uniformity. Tailor-made dimensions are designed
and manufactured in accordance with the size and weight of components.

• Tmax 900 °C, 1280 °C, 1340 °C or 1400 °C
• Five-side heating from the sides and the bottom
• Heating elements on supporting tubes provide for long service life
• SiC-bottom plates provide for level stack charging surface
• Bottom heating protected by SiC plates
• Multiple layer insulation with lightweight refractory bricks and special backing isolation
• Lid insulation consists of fiber material with a special fastening
• Electrohydraulic opening system of the lid with two-hand operation
• Closable air supply vents in the lower area of the furnace chamber
• Closable exhaust air vents in the lid
• Over-temperature limit controller with manual reset for thermal protection class 2 in accordance
• with EN 60519-2 as temperature limiter to protect the furnace and load

Additional equipment

• Automatic exhaust air flaps for faster cooling
• Controlled fan cooling with electrically driven exhaust air flaps
• Multi-zone control of the heating provides for optimal temperature uniformity
• Furnace chamber can be devided in length for short workparts, partitions can be controlled separately
• Customized dimensions
• Customized charging racks

In production lift-top and lift-bottom furnaces have the advantage in comparison with chamber
furnaces that even complex charge loads can be clearly arranged. The basic furnace is equipped
with a table fixed in place under the hood. The system can be expanded to include one or
more changeable tables, either manually or motor driven. Depending on process conditions,
a lift-top- or lift-bottom version is advisable. Further additional equipment like a multi-zone
control to optimize the temperature uniformity or controlled cooling systems for shorter
processes provide for customized solution with respect to the process requirements.
A combi furnace version with Debinding Package I or II for debinding and sintering in
 a single process is also available. The furnaces are moreover perfectly suited for
special applications like sintering fuel cells, in which auxiliary fittings must be introduced in the furnace from below or above.

• Tmax 1280 °C
• Double-walled housing with rear ventilation for low shell temperatures
• Electrohydraulically driven hood with fixed table
• Five-sided heating from all four sides and from the table provides for a good temperature uniformity
• Heating elements mounted on support tubes provide for free radiation and long service life of the heating wire
• Bottom heating protected by SiC tiles which provide for a level stacking surface
• Multilayer insulation consisting of lightweight refractory bricks backed by special insulation
• Long-life ceiling design with fiber insulation
• Manual exhaust air flap on the furnace roof
• Over-temperature limit controller with manual reset for thermal protection class 2 in
• accordance with EN 60519-2 as temperature limiter to protect the furnace and load

Additional equipment

• Customized dimensions
• Tmax to 1400 °C
• Lift-bottom furnace version with driven table and fixed hood
• Controlled cooling system with frequency-controlled cooling fan and motor-driven exhaust air flap
• Protective gas connection as well as sealing of the furnace housing for purging the furnace with protective gases
• Manual or automatic gas supply systems
• Multi-zone control adapted to the particular furnace provides model for optimal the temperature uniformity
• Commissioning of the furnace with test firing and temperature uniformity measurement
• (also with load) for the purpose of process optimization
• Additional tables, table changing system, also automatically driven
• Motor-driven exhaust air flap, switchable via the program
• Debinding Package I with passive safety package and monitoring of the underpressure
• in the furnace chamber, exhaust gas fan, fresh air fan, preset underpressure in the
• furnace chamber, controlled by Nabertherm controller P 300
• Debinding Package II with passive safety concept
• Exhaust air and exhaust gas piping
• Thermal or catalytic exhaust cleaning systems
• Heat recovery systems
• Emergency purging with nitrogen
• Process documentation and control with Controltherm MV software package for the basic
• furnace or Nabertherm Control Center (NCC) for monitoring, documentation and control in combination with Debinding Package II

The combi chamber furnaces N 200/DB - N 650/HDB are specially developed for debinding and
sintering in one process. The furnaces have a fresh air supply providing for dilution of the exhaust
gases produced during debinding, for safe prevention of an inflammable atmosphere in the
furnace chamber. The standard version of the furnaces includes Debinding Package I, with
fresh air injected at room temperature in the furnace and with a factory pre-set volume flow
with respect to the organic volume to be vaporized. In addition, the furnaces have an exhaust
gas fan that is also factory pre-set and provides for a safe underpressure in the furnace.
This system prevents exhaust gases from escaping into the production area. The passive
safety package immediately intervenes when the underpressure in the furnace chamber
drops. This system is recommended for reproducible processes in which the load does not change.

If the furnace is to be used flexibly with changing loads, we recommend Debinding Package II.
The furnace then includes fresh air preheating with variable fan speed and injection of the
warm fresh air through air distribution tubes. The exhaust gas fan also operates at variable
speed. The PLC control system automatically adjusts the underpressure in the furnace chamber.

• Tmax 1280 °C, 1340 °C or 1400 °C
• Five-sided heating from all four sides and from the floor for a good temperature uniformity
• Heating elements mounted on support tubes provide for free radiation and long service life of the heating wire
• Bottom heating protected by SiC tiles on the table to provide a level stacking surface
• Multilayer insulation consisting of lightweight refractory bricks backed by special insulation
• Self-supporting and long-life ceiling construction, with bricks laid in arched construction
• Motorized exhaust air flap on the furnace roof
• Debinding Package I with passive safety package and monitoring of the underpressure in the
• furnace chamber, exhaust gas fan, fresh air fan, preset underpressure in the furnace chamber,
• controlled by Nabertherm controller P 300, see page 6
• Over-temperature limit controller with manual reset for thermal protection class 2 in
• accordance with EN 60519-2 as temperature limiter to protect the furnace and load

Additional equipment

• Customized dimensions
• Multi-zone control adapted to the particular furnace model for optimizing the temperature uniformity
• Commissioning of the furnace with test firing and temperature uniformity
• measurement (also with load) for the purpose of process optimization
• Debinding Package II with passive safety concept
• Exhaust air and exhaust gas tubing
• Thermal or catalytic exhaust cleaning systems
• Emergency purging with nitrogen
• Process documentation and control with Controltherm MV software package for the
• basic furnace or Nabertherm Control Center (NCC) for monitoring, documentation and control in combination with Debinding Package II

These high-quality chamber furnaces for firing, sintering and tempering have qualified themselves
with the reliability for many years in daily use. Thanks to their five-side heating, the furnaces
provide for a very good temperature uniformity. A wide range of additional equipment
perfectly adapt these models to the process requirements.

• Tmax 1300 °C, 1340 °C or 1400 °C
• Five-side heating provide for good temperature uniformity
• Heating elements on support tubes provide for free heat radiation and long service life
• Vapour vent in the middle of the roof (excellent ventilation)
• Smoothly adjustable and easy-to-operate air inlet flap or sliding damper
• Self-supporting and long-life ceiling construction, with bricks laid in arched construction
• Special door lock for easy handling
• Multi-layer insulation consisting of lightweight refractory bricks and backed by special fibre insulation
• Models up to N 300/.. with removable stand
• Bottom heating elements protected by SiC tiles for level stacking surface
• Over-temperature limit controller with manual reset for thermal protection class 2 in
• accordance with EN 60519-2 as temperature limiter to protect the furnace and load

Additional equipment

• Motor-driven exhaust gas flap
• Fan system for faster cooling with manual or automatic control
• Protective gas connection as well as sealing of the furnace housing for purging the furnace with protective gases
• Manual or automatic gas supply systems
• Fiber-insulation for shorter cycle times, especially cooling periods
• Multi-zone control for optimal temperature uniformity in the useful chamber