Combi Bogie Hearth Furnaces with Wire Heating up to 1400 /°C for Debinding and Sintering in One Process

The combi bogie hearth furnaces were developed especially for debinding with subsequent sintering in one process. Equipped with a passive safety system, all functions relevant for debinding processes are monitored to ensure safe operation of the furnace. Also as part of the safety package, the furnace atmosphere is diluted with fresh air to prevent forming of a combustible atmosphere by the exhaust gases evaporating from the charge during debinding.

In the basic model, the furnaces are equipped with the DB100 debinding package. With this debinding package, preheated fresh air is  supplied into the furnace chamber ensuring that the combi bogie hearth furnace is operated with overpressure during the debinding phase.

For high binder amounts and/or varying debinding processes, these production furnaces are equipped with the DB200 debinding package.  The bogie hearth furnace then has a fresh air fan, which blows preheated fresh air into the furnace chamber via an air preheater, and an exhaust gas fan on the exhaust gas duct. This ensures that the volume of fresh air required for the debinding process is blown-in and, at the same time, an underpressure in the furnace chamber is automatically regulated via the furnace control system. The combi bogie hearth furnaces and the debinding packages can be customized to suit many different process requirements.

• Tmax 1280 °C, 1340 °C or 1400 °C
• Dual shell ventilated housing made of textured stainless steel sheets for low surface temperature and high stability
• Swing door hinged on the right side
• Heating from five sides (four sides and bogie) provides for a very good temperature uniformity
• Heating elements on support tubes provide for free heat radiation and long service life
• Bottom heating protected by SiC tiles with an even stacking base
• Self-supporting and long-life ceiling construction with bricks laid in arched construction
• Exclusive use of insulation materials without categorization according to EC Regulation No 1272/2008 (CLP). This explicitly means that alumino silicate wool, also known as “refractory ceramic fiber” (RCF), which is classified and possibly carcinogenic, is not used.
• Freely moveable bogie with rubber wheels up to model W 3300. Larger models have flange wheels and run on rails. 
• Motorized exhaust air flap on the furnace roof
• Stainless steel exhaust air hood as an interface to the customer's extraction system
• Inlets in the front corners of the bogie 2 x D = 40 mm for the customer’s thermocouples
• Over-temperature limiter with adjustable cutout temperature as temperature limiter to protect the furnace and load
• Defined application within the constraints of the operating instructions
• HiProSystems H1700, including Siemens PLC control system and 7" touchpanel as operating interface 

Debinding Package DB100

• Basic model for safe debinding operation with small binder amounts
• Fresh air fan and fresh air preheater
• Exhaust gas and exhaust air removed via one outlet with a motor-driven flap in an exhaust hood
• Performance of the debinding package customized to the process requirements

Debinding Package DB200

• Professional solution for large amounts of binder and changing varying processes
• Fresh air fan, fresh air preheater and monitoring of fresh air and exhaust gas flow rates
• Separate discharge of exhaust gases during debinding and exhaust air during cooling via separate outlets with motor-driven flaps
• Extendable with catalytic or thermal post combustion for a single furnace or alternating operation with two furnaces
• Performance of the debinding package customized to the process requirements