Compact Medium to High Temperature Infrared Thermal Processing Furnace

With basic models priced under $45k, the LA-306 is a low cost compact furnace ideal for processing dental lab and small dental facility production work. The small 6-inch wide chamber offers excellent temperature control and rapid rise to 1000C.

High Temperature Oven and Furnace with Nitrogen process gas flow

This is a true near-infrared furnace.  Process atmosphere is controlled using nitrogen process gas forced through the heating chamber insulation providing a pre-heated, laminar flow to create a uniform, stable atmosphere ideal for drying or sterilizing in a continouous process in an industrial or clean room environment. 

Process Reliability and Repeatability

Precise temperature is maintained by control thermocouples above the belt in each zone quickly sensing changing conditions. IR quartz heating lamps inside the chamber instantaneously adjust their output to achieve tight temperature control: each load through the furnace sees the same temperature profile.

The furnace is operated via individual digital PID controllers to control the temperature in each zone.  For efficiency and smooth control, phase-angle fired SCR's are used to power the lamps.

Dental Laboratory Applications

The LA-306 Dental Lab Furnace can process castings, substrates, wafers, metal, ceramic, glass, titanium and porcelain, or polycarbonate parts for dental bonding, Polymer Curing, Hybrid/Thick Film Firing, titanium porcelain veneering, and General Thermal Processing and sintering applications. In addition, these furnaces can be applied to tempering, annealing, hardening and quenching, solution annealing, forging, curing, preheating, drying, ageing applications on a continuous basis in an atmosphere controlled environment.

Furnace Arrangement

THERMAL PROCESSING
Parameter LA-306N
Load Station 38 cm (15 inches)
Entrance Isolation Baffle with Venturi Exhaust38 cm (15 inches)
IR Heating Chamber, Zone 119 cm (7.5 inches)
IR Heating Chamber Zone 238 cm (15 inches)
IR Heating Chamber Zone 319 cm (7.5 inches)
Transition Tunnel (optionally with Venturi Exhaust)38 cm (15 inches)
CACT Closed Atmosphere Cooling Chamber76 cm (30 inches)
Unload Station38 cm (15 inches)

LA-306N Furnace Entrance and Front Views

Cross-section of LA-306

Cross-section LA-306N Dental Furnace Internals

Specifications for LA-306N Compact Dental Production Furnace

Brochure  Datasheet:   Datasheet pdf
Owner's Manual:             pdf

NEW!  THREE PHASE MODELS NOW AVAILABLE

SPECIFICATIONS
Parameter LA-306D
Process Gas  Nitrogen (N2)
Control Zones3 zones
Heating Chamber length76 cm (30 inches)
Cooling ChamberCACT – N2 convective and radiant cooling, exterior fan heat removal.
Belt Speed10-500 mm/min (0.5-20 ipm) or 25-1000 mm/min (1-40) ipm (other speeds available)
Conveyor BeltBNV- low mass, stabilized Nichrome-V
Belt Size, nominal width 15 cm (6 in.)
Exhaust Improved venturi exhaust stacks to reduce process gas consumption.  Number of stacks vary with process requirements.
Temperature Capacity, max 1000C
ElectricalSingle phase design.  All models include universal transformers which accommodate 208-240 Vac and 50/60 Hz frequency anywhere in the world, allowing furnace relocation without external equipment. IR lamp controls automatically keep IR spectrum constant.

Facility Requirements

SPECIFICATIONS
Parameter LA-306Standard PowerHi Power
Power
Curve:
  Operating Current as a
  function of Temperature
208 Vac, 1 ph, 50/60 Hz
220 Vac, 1 ph,  50/60 Hz
230 Vac, 1 ph, 50 Hz (EU)/60 Hz
240 Vac, 1 ph,  50/60 Hz
13.8 kW, 66.5 A
14.2 kW, 64.4 A
14.5 kW, 62.9 A
14.8 kW, 61.6 A
17.2 kW, 82.6 A
17.2 kW, 78.1 A
17.2 kW, 74.7 A
17.2 kW, 71.6 A
ParameterProcess SectionTypical (exchange rate 2.0x)
850 C with balanced flow
Typical (exchange rate 2.6x)
850 C & 25 Lpm excess for Low O2
Process Gas SupplyNitrogen84 Lpm @ 5 bar
(177 SCFH @ 70 psig)
108 Lpm @ 5 bar
(229 SCFH @ 70 psig)
Process Gas ExhaustNitrogen84 Lpm
(177 SCFH)
97 Lpm
(206 SCFH)
Parameter    
Enclosure VentilationFurnace Cabinet Fan (1)
vent to room or facility exhaust system
930 m3/hr @ 30C
(550 cfm @ 86F)
 
Control Cabinet Fans (2)
(vents to room)
360 m3/hr @ 30C
(212 cfm @ 86F)
 
DimensionsLength3.07 m (121 inches)
Width0.64 m (25 inches)
Height1.71 m (67.5 inches)
Adjustable Conveyor Height9144 mm +/- 38 (36 inch +/- 1.5)
Weight500 kg (1100 LB)

 

LA-306D Furnace Standard Features and Options

Standard features are listed on the Standard Features pages (see link below). Popular options include the following:

POPULAR OPTIONS
Code DescriptionCode Description
NONitrogen Operation (std on Dental furnace)OAOxygen Analyzer
SENOutput sensor & chime for emerging partsMAMoisture Analyzer
AFRCoalescing Air Filter & RegulatorCXE15Load table entension (adds 15" to length)
CB-1Circuit BreakerCXX15Unload table extension (adds 15" to length)

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