LA-306N Dental Lab Furnace


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 1000 degrees *C*.

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 preheated, laminar flow to create a uniform, stable atmosphere ideal for drying or sterilizing in a continuous 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

Load Station38 cm
15 inches
Entrance Isolation Baffle with Venturi Exhaust38 cm
15 inches
IR Heating Chamber, Zone 1
19 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
Closed Atmosphere
Cooling Chamber
76 cm
30 inches
Unload Station38 cm
15 inches

LA-306N Front and Side View
LA-306N Front and Side View
Cross-section of LA-306N
Cross-section of LA-306N

Specifications for LA-306N Compact Dental Production Furnace


Process GasNitrogen N2
Control Zones3 Zones
Heating Chamber length76 cm (30 inches)
Cooling Chamber CACT
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
ExhaustImproved venturi exhaust stacks to reduce process gas consumption. Number of stacks vary with process requirements.
Temperature Capacity, max1000 degrees *C*
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

ParameterLA-306NStandard PowerHi Power
PowerPower208 Vac
1 ph
50/60 Hz
13.8 kW
66.5 A
17.2 kW
82.6 A
Curve220 Vac
1 ph
50/60 Hz
14.2 kW
64.4 A
17.2 kW
78.1 A
Operating Current
as a function
of Temperature
230 Vac
1 ph
50 Hz /60 Hz
14.5 kW
62.9 A
17.2 kW
74.7 A
240 Vac
1 ph
50/60 Hz
14.8 kW
61.6 A
17.2 kW
71.6 A
ParameterProcess SectionTypical (exchange rate 2.0x)
850 degrees *C*
with balanced flow
Typical (exchange rate 2.6x)
850 degrees *C*
25 Lpm excess for Low O
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
Enclosure VentilationFurnace Cabinet Fan
(1)vent to room
facility exhaust system
930 m3/hr
30 degrees *C*
550 cfm
86 degrees *F*
Control Cabinet Fans (2)vents to room360 m3/hr
30 degrees *C*
(212 cfm
86 degrees *F*
DimensionsLength3.07 m
121 inches
Width0.64 m
(25 inches)
Height1.71 m
67.5 inches
Adjustable Conveyor Height9144 mm
+/- 3836 inch
+/- 1.5
Weight500 kg
1100 lbs

LA-306N Furnace Standard Features and Options

Popular options include the following:

Nitrogen Operation (std on Dental furnace)
Output sensor & chime for emerging parts
Coalescing Air Filter & Regulator
Circuit Breaker
Oxygen Analyzer
Moisture Analyzer
Load table extension (adds 15″ to length)
Unload table extension (adds 15″ to length)


All standard models (except LA-306 series and “P” models) include a RAID1 computer with LCD  screen, full size keyboard interface
and both Ethernet and wireless-N high-speed network connections to facilitate view
and control of the furnace by managers and process engineers from any location.
Four (4) local USB ports are provided, convenient for connecting a furnace profiler and jump drive storage devices.

The new “P” series replaces the computer control system with high quality discrete digital controllers
for cost-effective precision control on repetitive production applications.
These furnaces are a good solution in applications where process recipes are changed infrequently and auxiliaries are at a minimum.