LAC, s. r. o.

Stefanikova 116, 66461 Rajhrad
Czechia

Telephone +420 547230016
Fax +420 547230212
sales@lac.cz

Location

Hall map

GIFA 2015 hall map (Hall 11): stand C22

Fairground map

GIFA 2015 fairground map: Hall 11

Contact

Pavel Herůfek

Department head/group leader
Marketing, sales, advertising, PR

Stefanikova 116
66461 Rajhrad, Czechia

Phone
+420 777 566 353

Email
herufek@lac.cz

Our range of products

Product categories

  • 02  Melting shop
  • 02.02  Electric melting and holding furnaces (pouring equipment see 10.01)
  • 02.02.07  Bale-out furnaces, electric

Bale-out furnaces, electric

  • 02  Melting shop
  • 02.03  Fuel-heated melting and holding furnaces
  • 02.03.01  Crucible melting and holding furnaces, fuel-heated

Crucible melting and holding furnaces, fuel-heated

  • 02  Melting shop
  • 02.03  Fuel-heated melting and holding furnaces
  • 02.03.04  Bale-out furnaces, fuel-heated

Bale-out furnaces, fuel-heated

  • 02  Melting shop
  • 02.03  Fuel-heated melting and holding furnaces
  • 02.03.05  Melting and holding furnaces, fuel heated

Melting and holding furnaces, fuel heated

  • 09  Gating and feeding
  • 09.05  Cooling elements

Cooling elements

  • 10  Casting machines and pouring equipment
  • 10.03  Peripheral equipment and auxiliary materials for die casting (die casting dies see 17.03.01)
  • 10.03.01  Ladling and dosing equipment for die-casting

Ladling and dosing equipment for die-casting

  • 14  Heat treating and drying furnaces
  • 14.01  Mould and ladle dryers

Mould and ladle dryers

  • 14  Heat treating and drying furnaces
  • 14.02  Core drying stoves

Core drying stoves

  • 14  Heat treating and drying furnaces
  • 14.03  Sand drying plants and stoves

Sand drying plants and stoves

  • 01  Industrial Furnaces, Industrial Heat Treatment Plants and thermal processes for
  • 01.07  Non-ferrous metals
  • 01.07.13  Heat treating
  • 01.07.13.01  Precipitation hardening

Precipitation hardening

  • 01  Industrial Furnaces, Industrial Heat Treatment Plants and thermal processes for
  • 01.07  Non-ferrous metals
  • 01.07.13  Heat treating
  • 01.07.13.02  Stress-relieving annealing

Stress-relieving annealing

  • 01  Industrial Furnaces, Industrial Heat Treatment Plants and thermal processes for
  • 01.07  Non-ferrous metals
  • 01.07.13  Heat treating
  • 01.07.13.03  Homogenization annealing

Homogenization annealing

  • 01  Industrial Furnaces, Industrial Heat Treatment Plants and thermal processes for
  • 01.07  Non-ferrous metals
  • 01.07.13  Heat treating
  • 01.07.13.04  Solution annealing
  • 01  Industrial Furnaces, Industrial Heat Treatment Plants and thermal processes for
  • 01.07  Non-ferrous metals
  • 01.07.13  Heat treating
  • 01.07.13.05  Artificial ageing

Artificial ageing

  • 01  Industrial Furnaces, Industrial Heat Treatment Plants and thermal processes for
  • 01.07  Non-ferrous metals
  • 01.07.13  Heat treating
  • 01.07.13.06  Soft annealing

Soft annealing

  • 01  Industrial Furnaces, Industrial Heat Treatment Plants and thermal processes for
  • 01.07  Non-ferrous metals
  • 01.07.13  Heat treating
  • 01.07.13.07  Other annealing processes

Other annealing processes

  • 01  Industrial Furnaces, Industrial Heat Treatment Plants and thermal processes for
  • 01.07  Non-ferrous metals
  • 01.07.14  Heating
  • 01.07.14.01  Heating, Preheating

Heating, Preheating

  • 01  Industrial Furnaces, Industrial Heat Treatment Plants and thermal processes for
  • 01.07  Non-ferrous metals
  • 01.07.14  Heating
  • 01.07.14.02  Holding at temperature (solid phase)

Holding at temperature (solid phase)

  • 01  Industrial Furnaces, Industrial Heat Treatment Plants and thermal processes for
  • 01.07  Non-ferrous metals
  • 01.07.14  Heating
  • 01.07.14.03  Holding at temperature (liquid phase)

Holding at temperature (liquid phase)

  • 02  Equipment for special use
  • 02.02  Laboratory equipment
  • 02.02.01  Laboratory-type annealing furnaces

Laboratory-type annealing furnaces

  • 02  Equipment for special use
  • 02.02  Laboratory equipment
  • 02.02.02  Laboratory-type melting furnaces

Laboratory-type melting furnaces

  • 03  Componentes, equipment and other supplies
  • 03.12  Heat-insulating and refractory
  • 03.12.01  Material
  • 03.12.01.02  Refractory materials

Refractory materials

Our products

Product category: Crucible melting and holding furnaces, fuel-heated

Melting gas tilting furnaces with recuperation system

These tilting furnaces are for melting and holding alloys to max temperature 1200 °C. Tilting version allows tilting and pouring the alloy into a transporting pan or transporting holding furnace for transport to follow-up processes. Furnaces type PTSPR are equipped with recuperation system that significantly reduces gas consumption.

 

Benefits:

  • Fuel saving resulting from the insertion of heated air into the gas burner of the recuperation system
  • Furnace provides estimated gas savings of 25 - 30 % less gas compared to conventional gas furnaces
  • Accurate temperature regulation in the heating chamber
  • Minimal heat loss due to use of top insulating materials and a rotating lid
  • Protective iron collar on the crucible rim ensures long crucible life
  • Lid can be easily disassembled for quick replacement of the crucible

 

Recuperation system:

Recuperation is the process of removal of the flue gas from the furnace to the incoming air fan that occurs in the heat exchanger. The burner sucks in up to 300 °C heated air directly from the exchanger.

Energy savings are calculated as the difference between the amount of gas used to heat the air to the required temperature, 20 °C intake from the area around the furnace and the heated air intake from the heat exchanger.


Standard design of furnace includes:

  • Crucible
  • Protective crucible collar
  • Recuperation system
  • HTH8 controller
  • Limit unit
  • Thermocouple in the furnace chamber
  • Switchboard
  • Metal-sheathed cable connection between the furnace and the electro cabinet
  • Manually-operated lid
  • Optional accessories for additional charge:
  • Charge thermocouple in protective tube
  • Crucible wall thermocouple
  • Calibration of the measuring points

 

Atypical accessories:

  • Folding furnace platform
  • Retractable protective visor
  • Hydraulically-powered lid
  • JUMO controller

 

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Product category: Solution annealing

Hardening line for the heat treatment of aluminum castings

The line consists of hardening furnace KNC/V and hardening water quenching bath KLV. The line is controlled by PLC. The PLC controls the temperature profile of the furnace and the water temperature in the quenching bath.

 

Technological process:

Solution annealing aluminum casting followed by water bath quenching. The charge is loaded into the furnace from the bottom and pulled into the furnace with a chain driven electro-motor with gearbox. After processing, the charge is automatically loaded into the quenching bath using a chain-driven electro-motor with gearbox. The furnace is equipped with an electric trolley that moves along rails built into the floor.

 

Solution annealing:
Max. Temperature: 600°C
Working temperature: 450-550°C

Quenching:
Transport to quenching bath: max. 18 seconds

 

Benefits:

  • Complete line for hardening aluminum alloy parts
  • Semi-automatic line operation
  • Rapid and automatic transport of the charge to the quenching bath
  • High-quality insulation materials result in low furnace operating costs and the dynamic progress of the thermal cycle
  • Precise temperature distribution in the furnace chamber

 

At the customer’s request, we are able to meet the standard AMS 2750 E (furnace class 2, and instrumentation according to customer requirements)

 

Standard equipment of the line includes:

  • Water quenching bath
  • Hardening furnace
  • Electrically-powered furnace movement
  • Hydraulically-powered doors opening to the back
  • PLC Simatic S7-1200 with operating panel

 

Optional accessories for extra charge:

  • Line expansion with additional of second hardening furnace
  • Artificial aging furnace
  • Quenching bath media heating and cooling
  • RS232 or EIA485 outlets (for connection of the regulator to a PC)
  • Ammeters for testing of the condition of the heating elements
  • Furnace fulfilment of AMS 2750 requirements
  • Calibration of the controller measuring entry
  • Ht Monit software set (including interface + software)

 

 

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About us

Company details

LAC Company (Czech Republic) has been a successful manufacturer and mar­keter of industrial furnaces, dryers and refractory castable shapes for more than two decades and has a strong presence in both in domestic as well as foreign markets. Since its establishment in 1992, the company has manufactured more than 12,000 furnaces.

The products are designed for applications in a wide range of heat treatment and technological processes and are particularly suited to the following:

  • Heat treatment of ferrous and non-ferrous metals in metallurgy
  • Heat treatment and chemical- heat treatment metal processing
  • Heat treatment for metal-shaping and welding processes
  • Low-temperature applications
  • Alloy technologies for non-ferrous metals
  • Laboratory technologies
  • Industrial production of glass and industrial ceramics
  • Production of hobby glass and ceramics

The LAC manufacturing program includes the manufacture of a complete standard range of furnace and dryer lines, and also accommodates the individual requirements of the customer through the design and manufacture of atypical furnaces tailor-made to meet customer specifications.

In response to ever-increasing global energy prices, LAC has begun to actively implement energy audits through which energy losses are identified, thus helping customers to significantly reduce energy costs.

The LAC development and design office works in tandem with a team of service techni­cians to ensure quality service to customers and pave the way for future company growth. LAC technological development has also progressed to include the fulfilment of NADCAP standard contracts for the aircraft and defence industries.

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Company data

Sales volume

10-49 Mio US $

Export content

max. 75%

Number of employees

100-499

Foundation

1992