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Mesh Belt Conveyor Furnaces
Continuous Copper Brazing, Silver Brazing and Annealing up to 2100°F/1150°C
If you produce light or medium weight parts where low cost, high volume production is required, a SECO/WARWICK mesh belt conveyor furnace will process your work efficiently and economically, typically free of oxidation and discoloration with less scale than other processes. The furnace is particularly well suited to continuous production line operations accepting parts ready for heat processing and discharging them ready for assembly or packaging.
Because the furnace can be utilized for many heat processes, it is widely applied for parts or assemblies used in volume production industries such as automotive, home appliance, electronics, aircraft and hardware.
Copper Brazing
Strong leak tight inexpensive joints can be made in steel by copper brazing, when the joint is properly designed. In volume production, copper brazing of joints is generally much less expensive than silver brazing, soldering, arc welding, seam welding or spot welding. Brazing flux is not required because the furnace atmosphere cleans the work.
Silver Brazing
Silver brazing will produce strong, leak-tight joints with almost any metal or combination of metals. With silver brazing, an assembly can be built up in a series of brazes, using a lower temperature brazing material for each successive braze.
Annealing
Annealing in a protective atmosphere can cut cost and improve quality by eliminating or minimizing subsequent cleaning operations. The annealing process can be used as a cleaning operation before further processing. Parts or assemblies can be brought out of the furnace hot enough to form a light and tight protective bluing on the product.
Dimensions, Data & Ratings
Design Features
Heating Elements
Ceramic silicon carbide type heating elements mounted above and below the belt provide efficient, uniform heating. They can be easily changed while the furnace is at temperature. Furnaces may also be supplied with resistance heating ribbon elements.
Tap Changing Transformer
A tap changing transformer permits varying the voltage to the elements to compensate for any changes in resistance due to gradual element aging; not required when using ribbon elements.
Cooling Chamber
The gas-tight, water cooled chamber is of double wall construction with water circulating on all four sides. Thermostatic controls automatically adjust water flow for optimum cooling and minimum water consumption. Multiple zones of water temperature control are provided to adjust cooling rates for different loads. Removable covers simplify periodic cleaning.
Mesh Belt and Belt Drive
A 10:1 ration variable speed drive unit with widely adjustable belt speeds allows the treatment of different thicknesses of materials with varying temperature requirements. The heat resistant nickel-chrome alloy belt is driven from the charge end of the furnace by a pinch roll, which presses the mesh belt tightly against a rubber covered drive drum. An idler drum at the discharge end of the furnace places tension on the belt to provide support throughout the return. Belt stretching is reduced since only a minimum tension is needed to pull the belt through the furnace. Belt take-up is made without manual adjustment.
Hearth Supports and Piers
Hearth supports are made of a series of silicon carbide tiles for uniform, low friction supports of the belt as it slides through the heating chamber. This design minimizes any stress and warpage due to temperature changes. Tiles are easily replaced. Brick support piers are utilized to support the silicon carbide hearth throughout the heating chamber.
Heating Chamber Assembly
The furnace casing, when using welded gas tight construction, is lined with high temperature resistant brick insulation in the side walls and floor. The removable roof lined with a lightweight insulation, allows for easy accessibility to the heating chamber for maintenance.
Doors
Entrance and exit doors are manual, adjustable to minimize atmosphere consumption and contamination. Throat-type refractory inner doors are standard on all models with door openings 18" or wider.
Flame Curtains
An air-gas flame curtain at each end of the furnace ignites escaping atmosphere gases and minimizes air filtration.
Atmosphere Curtains
Removable, multiple heat resistant curtains inside the charge and discharge opening reduce atmosphere losses and minimize infiltration of outside air. Exhaust hoods at each end of the furnace carry away waste atmosphere and products of combustion.
SECO/WARWICK reserved the right to change design, materials and specifications without notice, following its policy of continuous product improvement.
P. O. Box 908 180 Mercer Street Meadville, PA 16335-6908 USA
Phone (814)332-8400 - Fax (814)724-1407
info@secowarwick.com
©1995-2010 SECO/WARWICK Corporation All Rights Reserved.
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