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Type M

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Type M

Schmetz furnaces type M are predestined for the heat-treatment at high-temperatures as well as for brazing applications for specific industries like aircraft components or pelleting dies in food industry. The furnaces can be equipped with different cooling gas pressures from 0,9 – 13 bar (abs.) or higher and achieve an intensive cooling speed according to the individual technical requirements of our customers. These vacuum furnaces can be equipped with a convection heating for faster and more uniform cycles in specific temperature ranges and with a multi-direction cooling to achieve optimized distortion-less results.

 

The applications can be: hardening, hardening and tempering, high-temperature brazing, annealing and sintering. The furnaces are fully automated for a high reproducibility of the results with equal conditions.

 

Different models of this bottom-loaded vertical furnace type with round graphite hot zone and heating are possible for large to small loads

In 1987 we were the first vacuum furnace manufacturer to integrate the hot gas circulation into a vacuum hardening furnace. Meanwhile the convection system *FUTUR* has become a standard system in vacuum hardening furnaces. By means of the hot gas circulation in the temperature range up to 850°C the heating time and thus the load time could be shortened at an improved temperature distribution. This in turn leads to a lower energy consumption.

 

Already in 1983 we developed the first furnace with alternating cooling, the system *2R*. By means of the alternating cooling (stream through) the cooling time and thus the energy consumption were reduced with lower distortion at the parts of the load at the same time.

 

In a vertical furnace you can quench now in relation with your load in a radial-axial way to improve your results. Besides a standard one direction cooling this system enables you to reach better values.

 

The cooling gas direction change in a vertical bottom-loading furnace from 2 directions is already leading to an improvement of results. With the multi-directional system *Multi R* you can quench from several directions.  

As another core part of the furnace the process control is programmed in this way that in all steps of a heat treatment cycle the necessary energy is used efficiently when using all provided possibilities.

 

When programming the cycle the customer should always act according to the motto to use only that much energy that is necessary for the heat treatment and not as much as possible.

 

At the heat treatment in vacuum furnaces the consistent use of the load thermocouples has an important function regarding the reduction of the energy consumption. The most important fact is the selection of the temperature deviation load to the set value. The correct choice of this temperature in connection with the set temperature of the heating for each process step reduces the energy consumption to a minimum. The possibility to program control times for each temperature section in the SCHMETZ *TMS* system assists you to use only the energy that is necessary to warm the parts to the requested target temperature.

 

Besides the SCHMETZ modules, that are described in the above mentioned chapters and are included in the furnace, also the necessary external periphery, for example water pumps, can be switched on by means of the process control only to that time when it is needed in the process run.

 

type M

maximum fine vacuum

maximum high vacuum

10-2 mbar-range

10-5 mbar-range

maximum temperature

1250°C

1350°C

1600°C

max. cooling pressure

0,9 – 13 bar

loading

vertical

standard / option

type M

useful zone

up to 3000 x 3000

load weight

1500 kg – 5 t

temperature uniformity

+-5° C above 800 ° C

temperature uniformity system *Futur*

+-5° C above 200–800 ° C

possible options:

 

process supervision

microprocessor-controlled programmer – various choices available

more direction cooling *2R*

 

more direction cooling *RA*

 

system *Multi-R*

 

multi-zone regulation

 

diffusion pump

 

size

 

load dimension (diameter x height)

 

 

load weight (kgs) (gross)

 

22

1200 x 1200

1500

23

1200 x 1500

2000

33

1500 x 1500

2500

34

1500 x 3000

3000

44

1800 x 1800

3000

55

2100 x 2100

3500

64

2500 x 1800

4000

66

2500 x 2500

4000

77

2700 x 2700

4000

86

3000 x 1500

5000

88

3000 x 3000

5000

 

loading support devices (grids)

 

multi-zone heating

 

increased heating power

 

diffusion pump

 

turbomolecular pump

 

cryo pump

 

rotating bottom hearth during cooling

 

vertical top loader furnaces possible upon request
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