Vacuum brazing machine

automatedmulti-zone

Overview
Designing a furnace for exceptional temperature uniformity requires targeted calculations, simulation and proven engineering. Carbolite applies decades of heat-treatment expertise to standard and custom furnaces, focusing on vessel symmetry, flow management and insulation selection to achieve consistent temperature distribution across the work zone.

Retorts
A closed retort fully surrounds the sample to enable operation under modified atmospheres and to enhance temperature uniformity. Retorts can be supplied with gas outlets for debinding and other controlled-atmosphere processes.

Multi-zone design
Multi-zone tube furnaces compensate the natural temperature drop toward tube ends. Configurations such as 3-zone and 8-zone control are available to tailor axial uniformity over long heated lengths.

Intelligent design
Highly symmetric vessel geometry, heating element arrangement and flow routing are critical to even heat distribution. When gas flow is required, preheating and a dedicated ventilation/guiding system reduce thermal gradients, particularly in low-temperature ranges.

Radiation shields & High-grade insulation
Metallic radiation shields reflect heat inward and protect water-cooled vessels; shields, vessel and heating elements must be symmetric for best uniformity. Low thermal conductivity materials such as graphite felt and ceramic fibre are selected by thickness and grade according to the furnace maximum operating temperature.

Examples

• The standard V-L 180-300/10 soldering and brazing furnace: suitable for achieving very low operating pressures with excellent temperature uniformity
• Custom three-zone split tube furnace FZS 13/100/4500: 4500 mm heated length, automated opening mechanism and APM work tube
• Custom industrial Top Hat furnace with multi-zone temperature control
• Vacuum chamber furnace HTK GR 80/22 automatic with optional door heater to improve uniformity

Technical specifications

• Multi-zone options: 3-zone and 8-zone tube furnaces
• Closed retorts for operation under modified atmospheres; retorts can include gas outlet for debinding
• Gas preheating and dedicated gas ventilation/guiding systems for improved uniformity at low temperatures
• Highly symmetric vessel, heating element and radiation shield design to optimise temperature distribution
• Metallic radiation shields used to reflect heat inward; suitable for water-cooled vessel designs
• Insulation materials: graphite felt and ceramic fibre; thickness and grade selected according to maximum operating temperature
• Optional features: door heater for vacuum chamber furnaces to improve uniformity
• Example model/assembly references: V-L 180-300/10, FZS 13/100/4500, HTK GR 80/22