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LAC, s. r. o.
Topolová 933,,
66701
Zidlochovice
Czechia
Czechia
Location
Hall map
Fairground map
Our range of products
Product categories
- 02 Melting shop
- 02.02 Electric melting and holding furnaces (pouring equipment see 10.01)
- 02.02.04 Melting and holding furnaces, electric resistance type
Melting and holding furnaces, electric resistance type
- 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
- 02.05 Melting and holding furnaces, accessories
- 02.05.03 Heating wires and heating bars for electric resistance type furnaces
Heating wires and heating bars for electric resistance type furnaces
- 03 Refractories technology
- 03.01 Refractory materials and products, insulating materials
- 03.01.02 Refractory bricks
Refractory bricks
- 14 Heat treating and drying furnaces
- 14.04 Heat treating furnaces and installations
Heat treating furnaces and installations
- 25 Additive Manufacturing
- 25.04 Post Processing
- 25.04.07 Heat treatment
Heat treatment
- 01 Industrial Furnaces, Industrial Heat Treatment Plants and thermal processes for
- 01.06 Ceramics
- 01.06.02 Sintering
Sintering
- 01 Industrial Furnaces, Industrial Heat Treatment Plants and thermal processes for
- 01.07 Non-ferrous metals
- 01.07.09 Melting
- 01.07.09.01 Alloying
Alloying
- PT Mk. II electric melting stationary furnace up to 1100 °C
- PTS melting electric tilting furnace up to 1200 °C
- PTSP melting gas tilting furnace up to 1200 / 1400 °C
- PTSPR melting gas tilting furnace with recuperation system up to 1200 °C
- PTP melting gas stationary furnace up to 1200 / 1400 °C
- PTPR melting gas stationary furnace with recuperation system up to 1200 °C
- 01 Industrial Furnaces, Industrial Heat Treatment Plants and thermal processes for
- 01.07 Non-ferrous metals
- 01.07.12 Drying
- 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
- 01.07.13.05 Artificial ageing
Artificial ageing
- 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
- 01.08 Steel and Iron
- 01.08.03 Heat treating
- 01.08.03.02 Heating, Preheating
Heating, Preheating
- 01 Industrial Furnaces, Industrial Heat Treatment Plants and thermal processes for
- 01.08 Steel and Iron
- 01.08.03 Heat treating
- 01.08.03.05 Annealing
- 01 Industrial Furnaces, Industrial Heat Treatment Plants and thermal processes for
- 01.08 Steel and Iron
- 01.08.03 Heat treating
- 01.08.03.08 Quenching
- 01 Industrial Furnaces, Industrial Heat Treatment Plants and thermal processes for
- 01.08 Steel and Iron
- 01.08.04 Diffusion processes
- 01.08.04.08 Nitriding
Nitriding
- 02 Equipment for special use
- 02.02 Laboratory equipment
- 02.02.01 Laboratory-type annealing furnaces
Laboratory-type annealing furnaces
Our products
Product category: Melting and holding furnaces, electric resistance type, Alloying
PT Mk. II electric melting stationary furnace up to 1100 °C
The furnace that saves both money and space
These furnaces are used as melting and holding units for various aluminium alloys up to 900 / 1100 °C. They are designed with the emphasis on energy savings and with a view to reduce the dimensions of the equipment. This was achieved thanks to our modern insulation materials and a new system for affixing the heating spirals.
We achieved the smallest possible dimensions thanks to our use of the latest insulation materials and a new system for mounting the heating spirals. We placed them in the grooves of refractory castable shaped blocks, preventing them from overheating and protecting them from molten aluminium if the crucible should happen to crack.
The PT Mk.II furnaces belong among the most effective and energy-efficient facilities on the market for melting and holding aluminium. And this is not only because we have reduced their power needs to a minimum, but also thanks to their new insulation system.
Product category: Melting and holding furnaces, electric resistance type, Alloying
PTS melting electric tilting furnace up to 1200 °C
For easier pouring of melting product into the transport ladle or furnace
This is a melting furnace that you can tilt so as to pour melting product into a transport ladle or a transport holding furnace where it will be treated further.
Product category: Crucible melting and holding furnaces, fuel-heated, Alloying
PTSP melting gas tilting furnace up to 1200 / 1400 °C
Easy pouring of melting product thanks to tilting feature
This furnace is used for melting aluminium and copper alloys with the option to transfer the melting product into a transport ladle or a transport holding furnace for conveyance to its next point of processing.
Product category: Crucible melting and holding furnaces, fuel-heated, Alloying
PTSPR melting gas tilting furnace with recuperation system up to 1200 °C
An efficient furnace for easy pouring of melting products
This tilting gas furnace with recuperation can help you to save 25-30 % of gas when compared with standard gas furnaces. We have furnished our gas burner with a recuperator, which preheats the air intended for use in combustion. Through this it reduces chimney losses and thus reduces the furnace’s consumption.
This furnace is used for melting metals at up to 1,200 °C (in a furnace chamber; approximately 1,100 °C in the furnace’s crucible) with the option to transfer the melting product into a transport ladle or a transport holding furnace.
This tilting gas furnace with recuperation can help you to save 25-30 % of gas when compared with standard gas furnaces. We have furnished our gas burner with a recuperator, which preheats the air intended for use in combustion. Through this it reduces chimney losses and thus reduces the furnace’s consumption.
This furnace is used for melting metals at up to 1,200 °C (in a furnace chamber; approximately 1,100 °C in the furnace’s crucible) with the option to transfer the melting product into a transport ladle or a transport holding furnace.
Product category: Crucible melting and holding furnaces, fuel-heated, Alloying
PTP melting gas stationary furnace up to 1200 / 1400 °C
A furnace that will save you money on operating costs
The PTP melting and holding furnaces are used for the alloys of a variety of metals (tin, zinc, lead, aluminium, silver, gold, copper). Thanks to the gas burner used, this furnace has a high melting output. We have achieved minimal heat losses, and thus operating cost savings for you, by using top-quality insulation materials and a rotary lid. The alloy collar, meanwhile, ensures a long life for the crucible.
The PTP melting and holding furnaces are used for the alloys of a variety of metals (tin, zinc, lead, aluminium, silver, gold, copper). Thanks to the gas burner used, this furnace has a high melting output. We have achieved minimal heat losses, and thus operating cost savings for you, by using top-quality insulation materials and a rotary lid. The alloy collar, meanwhile, ensures a long life for the crucible.
Product category: Crucible melting and holding furnaces, fuel-heated, Alloying
PTPR melting gas stationary furnace with recuperation system up to 1200 °C
Recuperation to minimise your gas consumption
This furnace is used for melting metals up to 1,200 °C (approx. 1,100 °C in the crucible) and, if needed, the subsequent pouring of the melted product over into a transport ladle or a transport holding furnace. It is then transported for further processing. The furnace is fitted with a recuperator which preheats the air intended for combustion in the gas burner. Through this it reduces chimney losses and thus the furnace’s consumption. This in turn can give you gas savings of 25 to 30% compared to an ordinary gas furnace.
This furnace is used for melting metals up to 1,200 °C (approx. 1,100 °C in the crucible) and, if needed, the subsequent pouring of the melted product over into a transport ladle or a transport holding furnace. It is then transported for further processing. The furnace is fitted with a recuperator which preheats the air intended for combustion in the gas burner. Through this it reduces chimney losses and thus the furnace’s consumption. This in turn can give you gas savings of 25 to 30% compared to an ordinary gas furnace.
Product category: Melting and holding furnaces, electric resistance type
PTT Melting Transport Furnace up to 900 °C
Back The melting transport furnace is suitable for transporting the melt between the melting furnace and the workplace where the melted metal is cast. The maximum temperature in the heating space is 900 °C. The cast iron collar ensures a long life for the crucible.
The furnace is intended for the transport (using a forklift) of melts of aluminium alloys between the melting furnace and the workplace where the melted metal is cast.
The furnace is intended for the transport (using a forklift) of melts of aluminium alloys between the melting furnace and the workplace where the melted metal is cast.
Product category: Heating wires and heating bars for electric resistance type furnaces
Heating wires and spirals
Spiral Production Within Just 24 Hours
Back Spirals are consumables, and you may need to replace them fairly often. The frequency depends on how a furnace is operated and at what temperature. When the time comes for replacing a worn-out spiral, just send use the drawings and fill out a short form to let us know the specific details needed for producing a new spiral the next day. On the basis of this information, we will then select the most appropriate material and send you a heating spiral for not just our devices, but also our competitors’. Within 24 hours.
Back Spirals are consumables, and you may need to replace them fairly often. The frequency depends on how a furnace is operated and at what temperature. When the time comes for replacing a worn-out spiral, just send use the drawings and fill out a short form to let us know the specific details needed for producing a new spiral the next day. On the basis of this information, we will then select the most appropriate material and send you a heating spiral for not just our devices, but also our competitors’. Within 24 hours.
Product category: Refractory bricks
Refractory Castable Shapes
Ask for more than just refractory concrete. Ask for services that you won’t find anywhere else. Refractory concrete is not fire clay. It is a much tougher, stabler and more resistant material. However, a poor choice of shaped blocks or materials may cause cracking or premature wear in your shaped blocks. But we know what we’re doing. Even before we test-cast your first shaped blocks, we can tell you whether the shape you’ve proposed is suitable for your application.
K chamber furnace up to 1300 / 1340 / 1400 °C
When you need to fire ceramics in larger amounts
Mainly used in the ceramics sector for firing decorative and industrial ceramics in large amounts. This furnace’s shape and design ensure perfect temperature distribution and the option of quick run-up to the required temperature.
Mainly used in the ceramics sector for firing decorative and industrial ceramics in large amounts. This furnace’s shape and design ensure perfect temperature distribution and the option of quick run-up to the required temperature.
VKK bogie-hearth furnace up to 1280 / 1340 °C
Meets the very highest firing demands
This furnace is made for professional ceramicists and production plants for the firing of ceramics, earthenware, glass, porcelain, and decors.
This furnace is made for professional ceramicists and production plants for the firing of ceramics, earthenware, glass, porcelain, and decors.
Product category: Homogenization annealing, Heating, Preheating, Heating, Preheating, Annealing, Quenching
PK hardening chamber furnace up to 1280 °C
A sturdy furnace for hardening and more, even available in a semigastight version
We design our hardening chamber furnaces as very durable facilities for hardening, annealing, or preheating metal charges before forging under an oxidizing atmosphere. The heating elements are covered with SiC plates with strong mechanical durability, which protect them from damage. Heating from three sides, meanwhile, is a guarantee of even heat distribution within the operating area.
At your request, we also manufacture these furnaces in a semi-gastight version with a working tub, so that you can also use them for heat treatment of a charge under a partially protective atmosphere. Do not expect, however, for this furnace to be on par with a gastight furnace after these adjustments. This is truly only partial protection of the charge.
We design our hardening chamber furnaces as very durable facilities for hardening, annealing, or preheating metal charges before forging under an oxidizing atmosphere. The heating elements are covered with SiC plates with strong mechanical durability, which protect them from damage. Heating from three sides, meanwhile, is a guarantee of even heat distribution within the operating area.
At your request, we also manufacture these furnaces in a semi-gastight version with a working tub, so that you can also use them for heat treatment of a charge under a partially protective atmosphere. Do not expect, however, for this furnace to be on par with a gastight furnace after these adjustments. This is truly only partial protection of the charge.
Product category: Homogenization annealing, Artificial ageing, Heating, Preheating, Heating, Preheating, Annealing
VKT bogie-hearth furnace up to 900 / 1260 °C
For easier loading of charges with large bulk or quantity
Thanks to its sturdy construction, this chamber furnace holds up in even the heaviest operations. The charge is loaded onto the furnace bogie, which is then driven into the furnace. You control the furnace using programmable PID controllers, and so you can very precisely choose the course of the operation in progress inside the furnace’s chamber. In bogie-hearth furnaces, we can also set up even heat distribution according to the DIN 17052–1 standard.
Thanks to its sturdy construction, this chamber furnace holds up in even the heaviest operations. The charge is loaded onto the furnace bogie, which is then driven into the furnace. You control the furnace using programmable PID controllers, and so you can very precisely choose the course of the operation in progress inside the furnace’s chamber. In bogie-hearth furnaces, we can also set up even heat distribution according to the DIN 17052–1 standard.
Product category: Heat treatment
Industrial furnaces for additive manufacturing
Additive Manufacturing is a general designation of all various methods of 3D printing. E.g. by plastic fibre melting, sintering plastic or metallic powder materials, etc. Our furnaces are designated for all the technologies listed below, for metal processing – melting or sintering of metallic powders or fibres which do not contain additional binders.
Examples of the types of 3D printing technologies:
• FFF (or FDM) – printing of functional models with molten plastic
• SLA (or DLP) – photosensitive resin curing
• SLS – plastic powder laser sintering
• DMLS – metallic powder sintering
• Solidscape – wax model printing
• ProJet – printing of fragile full-colour models from powder
• Mcor – printing of fragile full-colour models from paper
Examples of the types of 3D printing technologies:
• FFF (or FDM) – printing of functional models with molten plastic
• SLA (or DLP) – photosensitive resin curing
• SLS – plastic powder laser sintering
• DMLS – metallic powder sintering
• Solidscape – wax model printing
• ProJet – printing of fragile full-colour models from powder
• Mcor – printing of fragile full-colour models from paper
Bogie-hearth or chamber low-temperature furnaces and dryers with forced circulation
We have designed bogie-hearth chamber dryers and low-temperature furnaces for convenient loading of bulky and heavy charges. They are useful not only for drying, tempering, and artificial ageing, but also for heat treatmentof a variety of materials.
PKRC and SRC gastight furnaces
PKRC gastight chamber furnaces with circulation of internal atmosphere are characterized especially by their precise temperature distribution. They are used especially for heat treatment of materials in the defined protective atmosphere (argon, nitrogen, moulding gas).
SRC gastight shaft furnace is primarily used for heat treatment of large and heavy charges in a predefined protective atmosphere (argon, nitrogen, forming gas, etc.).
These furnace should be customizated to nitriding furnace.
SRC gastight shaft furnace is primarily used for heat treatment of large and heavy charges in a predefined protective atmosphere (argon, nitrogen, forming gas, etc.).
These furnace should be customizated to nitriding furnace.
Product category: Laboratory-type annealing furnaces
L universal laboratory furnace
Universal laboratory assistant, capable of handling even the most demanding tasks.
Laboratories of all types appreciate the versatility of this furnace. Its heating elements are encased in ceramic panels, giving it extra protection from mechanical and chemical damage. L furnaces have a ventilation chimney flue for the extraction of fumes, but note that they are not suitable for pyrolysis. The design quality and materials used in the construction of the L furnace guarantee that it can handle even the most demanding tasks.
Laboratories of all types appreciate the versatility of this furnace. Its heating elements are encased in ceramic panels, giving it extra protection from mechanical and chemical damage. L furnaces have a ventilation chimney flue for the extraction of fumes, but note that they are not suitable for pyrolysis. The design quality and materials used in the construction of the L furnace guarantee that it can handle even the most demanding tasks.
Product category: Heat treating furnaces and installations
Furnaces for Heat Treatment of Metals
In our furnaces for the heat treatment of metals, we always try to offer you the most advantageous solution with an excellent cost-to-benefit ratio. We seek ways to make the operation of your furnace easier, to increase its capacity, and to decrease your facility’s operating costs. But you don’t need to worry that we’d ever scrimp on materials or on furnace manufacturing. And with us, you can always be sure that our furnaces will be well taken care of throughout their operation. You can rely on our maintenance services.
About us
Company details
Ledl and Crhák. Two foundrymen—friends who built their first furnaces for enjoyment and for their friends. Today, they own a company that ships furnaces, dryers and refractory castable shapes all around the world.
The products are designed for applications in a wide range of heat treatment and technological processes and are particurarly suited to the following:
- heat treatment of ferrous and non-ferrous metals in metallurgy
- heat treatment and chemical- heat treatment metal processing
- alloy technologies for non-ferrous metals
- low-temperature applications
- laboratory technologies
- industrial and hobby production of ceramics
In our 25 years on the market, we have learned what you, our customers, want and need. We always strive to meet you halfway, which is why LAC has come to specialize in custom production, which now forms over 60 % of our work. With our products, we help you to increase your production capacity, save on energy costs, reduce boiler emissions, and maintain your equipment in the best condition possible for the longest time possible. You see, they want to be sure that we supply high-quality products that will serve you long and well. They want to always be proud of how we do our work.
Since our founding in 1992, we have developed and produced over 14,000 furnaces and dryers and over 50,000 different shapes for refractory castable shapes.
The products are designed for applications in a wide range of heat treatment and technological processes and are particurarly suited to the following:
- heat treatment of ferrous and non-ferrous metals in metallurgy
- heat treatment and chemical- heat treatment metal processing
- alloy technologies for non-ferrous metals
- low-temperature applications
- laboratory technologies
- industrial and hobby production of ceramics
In our 25 years on the market, we have learned what you, our customers, want and need. We always strive to meet you halfway, which is why LAC has come to specialize in custom production, which now forms over 60 % of our work. With our products, we help you to increase your production capacity, save on energy costs, reduce boiler emissions, and maintain your equipment in the best condition possible for the longest time possible. You see, they want to be sure that we supply high-quality products that will serve you long and well. They want to always be proud of how we do our work.
Since our founding in 1992, we have developed and produced over 14,000 furnaces and dryers and over 50,000 different shapes for refractory castable shapes.
Company data
Sales volume10-49 Mio US $
Export contentmax. 75%
Number of employees100-499
Foundation1992
Area of business- Industrial furnaces, industrial heat treatment plants and thermal processes
- Melting shop
- Refractory technology
- Heat treating and drying furnaces