Wolfgang KOHNLE Wärmebehandlungsanlagen GmbH

Postfach 12 55, 75212 Birkenfeld
Industriestr. 27-29, 75217 Birkenfeld
Germany
Telephone +49 7231 9493-0
Fax +49 7231 471800
vertrieb@kohnle.de

This company is main exhibitor of

Location

Hall map

THERMPROCESS 2015 hall map (Hall 9): stand F74

Fairground map

THERMPROCESS 2015 fairground map: Hall 9

Our range of products

Product categories

  • 01  Industrial Furnaces, Industrial Heat Treatment Plants and thermal processes for
  • 01.01  Precious Metals
  • 01.01.02  Heat treating

Our products

Product category: Heat treating

Retort Type Mesh Belt Furnace Typ BLH:

Features:

  • Operating temperature range 550°C - 950°C
  • High temperature furnace with metallic muffle (retort)
  • Mesh belt of chromium-nickel - alloyed wire of variable design
  • Conveyor belt advances on metallic or ceramic sliding rails
  • Protective / reactive atmosphere contained within muffle (retort)
  • Heating via: recuperated gas burners or electric heaters
  • Atmosphere circulation fans for homogenisation of atmosphere
  • Fast and flexible changeover in between different processes
  • Parts loading externally of furnace on designated entry loading table

Capacity range and applicable processes:

  • Up to 500 kg/hr depending upon temperature and process
  • Austempering (with subsequent bainite transformation)
  • Austenitising
  • Blueing
  • Carbonitriding
  • Gas carburising
  • Hardening
  • Nitrocarburising
  • Solution annealing
  • Spheroidize annealing
  • Tempering
  • Combined with quenching in:

- Salt (150 - 400°C)
- Hot oil (100 - 250°C)
- Oil (40 - 100°C)
- Polymer (30 - 50°C)
- Water (30 - 70°C)

Line Arrangement / Companion Equipment:

  • Automatic loading and unloading equipment
  • Automatic handling-, transport- and transfer equipmen
  • tVibratory transfer chutes
  • Pre-washer with de-phosphating zone
  • Post-washer
  • Washers of:

- continuous belt type design
- straight through rotary drum type
- centrifugal drum type

  • Oil-, salt-, polymer- or water quench unit with discharge conveyor
  • Cyrogenic sub-zero treatment units ( down to -80°C)
  • Tempering and stress relieving furnaces
  • Integrated or external protective gas generators
  • Atmosphere control systems
  • Control cabinet with PLC control and operator panel
  • Supervisory PC system

 

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Product category: Heat treating

Retort Type Mesh Belt Furnace Type HT

Features:

  • Operating temperature range 300°C - 1180°C
  • High temperature furnace with metallic muffle (retort) and advanced ceramic fibre insulation
  • Mesh belt of chromium-nickel - alloyed wire of variable design
  • Conveyor belt advances on metallic or ceramic sliding rails
  • Protective / reactive atmosphere contained within muffle (retort)
  • Heating via: recuperated gas burners or electric heaters
  • Convective gas quench or fast cooling and/or slow cooling via water jacketed cooling channel
  • Parts loading externally of furnace on designated entry loading table

Capacity range and applicable processes:

  • Up to 1000 kg/hr depending upon temperature and process
  • Austenitising
  • Blueing
  • Brazing
  • Hardening
  • Nitrocarburising
  • Normalising
  • Oxydising
  • Recristallisation annealing
  • Reducing
  • Soft annealing Solution annealing
  • Spheroidize annealing
  • Tempering / stress relieving
  • Combined with quenching in: Gas

Line Arrangement / Companion Equipment:

  • Automatic loading and unloading equipment
  • Automatic handling-, transport- and transfer equipment
  • Vibratory transfer chutes
  • Entry- and exit vestibules
  • Fixtures for batch type operation
  • Pre-washer with de-phosphating zoneWashers of:
  • - continuous belt type design
  • - straight through rotary drum type
  • Gas quench module
  • Cyrogenic sub-zero treatment units (down to -80°C)
  • Tempering and stress relieving furnaces
  • Zn, Sn and Al - filtration and atmosphere cleaning systems
  • Integrated or external protective gas generators
  • Atmosphere control systems
  • Control cabinet with PLC control and operator panel
  • Supervisory PC system

 

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About us

Company details

Tradition and Modernity, Quality and Reliability

Established in 1961, KOHNLE GmbH has been successfully managed until 1989 by the founder and owner,
Mr. Wolfgang KOHNLE. Ownership has been transferred to an U.S. venture capital group in 1989 and
remained there until 1995, when a small group of local, private shareholders purchased the company.
KOHNLE remained to stay at the same location - Birkenfeld / Pforzheim - in the south of Germany in the
northern outbound of the black forest, though it’s facilities several times underwent expansion and
modernization measures.

The focus of KOHNLE for the first 20 years of it’s existence was mainly the local watch & jewelry industry
as well as surgical instruments industry, whom were back then demanding a large number of small and
medium size continuous straight trough annealing furnaces.

Towards the end of the 1970's, KOHNLE introduced larger and more complex heat treatment to the market
and at the same time market activities increased throughout Germany and also beginning on some selected
export markets.

About ten years later - at the end of the 1980's - the product portfolio could be expanded again,
now introducing a full range of state of the art gas heating systems. At the same time, available capacity
has been increased up to 2.000 kg/hr and more export markets, including overseas were served as well.

Again, a decade later - 1999 - KOHNLE embarked under new management to increase the diversity of it’s
product portfolio, including numerous new developments. Kohnle heat treating lines could be successfully
placed within the automotive industry, since then the central focus of the company.

KOHNLE founded a subsidiary company in India together with a local company. The name of this new founded
subsidiary company is KOHNLE HEAT TREATING SYSTEMS Pvt. Ltd. and is located in Chennai.
Togehter with this company KOHNLE is able to serve high quality heat treatment lines for a lower price
including German design work to customers which are located outside of Europe.

Currently and for the future KOHNLE is focused to increase the energie efficiency of heat treatment lines
to protect the environment and reduce the running costs of the machines.

At KOHNLE’s headquarter - Birkenfeld, Germany - approx. 40 engineers and employees are taking care
of development, design, detail- and final factory assembly and testing of all equipment.

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