IWG Ingenieurbüro Wagenbauer
Description Type Size  
Pot furnace with 3 pots for tableware, heated by electricity
We deliver single pot furnaces as well as pot furnaces up to 12 pots for soda lime glass, crystal glass, colored glass. Our pot furnaces are designed to the latest Kow How in furnace design.
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Tank furnace for optical glass
Technical Data, General Overview, Know how, Technical Development
(Wannen für optisches Glas - Prospekt nur in englisch verfügbar)
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Tank furnace for optical glass
->drawing of bars
->casting of bullion
->pressing of spectacle glass blanks
->pressing of optical lenses
->casting of aspheric lenses

Our tank furnaces for optical glass are gas and electrically heated and equipped with state-of-the-art Platinum technology.
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IWG - gas heated forehearth systems
for the following production lines:
Glass bricks
Lighting ware
High quality containers
Tableware / stemware

Advantages of our system:
We design your forehearth according to the specific situation of your production line.

Following options are available:
Forehearth - coloring, Electrical boosting
Active electrical insulation of the channel
IWG-stirrer units for glass homogenization
IWG draining system for forehearth for
minimization of Zircon cords
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Gas heated furnace for Neutral Glass and Borosilicate Glass
IWG has developed a furnace concept to melt Neutral glass (with alpha 45 - 50) and Borosilicate glasses (with alpha 33).

The furnace is designed according to the mixed-melter principle. In the superstructure of the melting end either oxy-fuel or recuperative firing will be used. In addition to this heating there is in the melting area a bottom-electrode booster installed, in order to reach the required glass temperatures in the refining area.

Melting area and refining area are devided by a weir. In front of this weir bubblers and a molybdenum electrode booster increase the glass temperature and help to generate a return current of the glass to the doghouse. Because of this system cold glass or unmelted glass can not enter the refining area and it also prevents the formation of crystobalite on the glass surface in front of the throat.

Installed in the refining area is an IWG-draining system, which continuously drains the bottom glass with high Zircon content.

The working end will be heated by molybdenum top-electrodes, which are immersed in the glass bath, through a cover plate of the working end distribution.

The power regulation of electrical booster, thermal weir and working end heating is made by using single phase thyristor / transformer units.

Advantages of using this furnace design:
Lower energy costs in countries with lower gas prices
Lower content of zircon cords
Fewer defects by crystobalite stones
Easier handling than a full electric furnace
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Reference List (national customers - Germany)
National customers and references
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Reference list (international - worldwide)
International customers and references
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Hafenofen mit 3 Häfen für Tafelglas, elektrisch beheizt.
Wir liefern sowohl einzelne Hafenöfen als auch Hafenöfen mit bis zu 12 Häfen für Kalk-Natron-Glas, Kristallglas und farbiges Glas.
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