Heat resistant casting products

As specialist for heat resistant casting fixtures, the foundry Friedr. Lohmann GmbH in Witten is generally represented with all furnace types in the heat treatment sector as replacement parts supplier. The customer groups heat treatment and furnace building companies trust the long-time experience of the virtually 100% on-site manufactured casting parts.

The casting components range from base and supporting grids, baskets to whole fixture and supporting systems. Furthermore, supplementary wire mesh items are installed. Standard parts, but especially individual loading plans in the make-to-stock production with manual and automatic loading are a meaningful part of the whole range of products.

Lohmann designs economic solutions from customer requests. The construction counselling synchronises the requests for parts with the available CAD-supported casting options. The wide range of counselling services includes the appropriate choice of materials and static load calculations of the temperature curve. All new constructions are simulated first to avoid cavities and initial samples are provided for testing as well. The make-to-stock production starts after customer clearance. The high level of in-house production allows for delivery periods on short-notice.

Different casting processes are used in Witten depending on customer requests. The sand casting in machine moulding using pulse shape casting and vibration moulding as well as large scale casting manufacturing in hand-moulded casting constitutes the main part. The shell moulding process is proven and tested for the request of high-precision surfaces. Hinged plate belts as used in forging or screw industry are manufactured with this casting process. We assemble the belts completely in-house. Lohmann delivers the necessary equipment like drive- and deflecting-rollers and formed rollers.

In the service sector we offer chipping options, repair of used heat treatment fixtures, return of old castings to recycle and use of own stock capacities with framework agreements need to be highlighted.

The topic cost control in heat treatment is currently gaining importance. Lohmann is dedicated to economic use of heat treatment fixtures. By objectively analysing durability according to secured furnace cycles, streamlining projects and optimisation of customer-related application in heat treatment are created.


The range of products

  • Base grids (Foto)
  • Cast frames
  • Posts, spacers
  • Cross beames, load beams
  • Multistage grids
  • Stackable grids (Foto)
  • Perforated grids (Foto)
  • Cast baskets (with mesh, bolted) (Foto) 
  • Cross frame base
  • Intermediate spiders
  • Carrier bars
  • Segment grids 
  • Cast link belts (Foto)
  • Driving rollers, deflecting rollers
  • Kiln roller 
  • Shaft impactor
  • Nozzle tube 
  • Press moulding mesh 

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