High mold strength, precise shape reproduction, and excellent core collapsibility.
Appropriately selected foundry binders and additions to molding sands are the foundation of trouble-free production in every foundry. These components affect the durability of molds and cores, ensure tight joints, guarantee dimensional stability at high temperatures, and facilitate the knock-out of finished castings.
How do binders and sand additions work?
A carefully selected chemical composition ensures optimal technological parameters at every stage of production:
- Creating reliable molding sand: When mixed with silica sand, the binders create strong bonds making the sand resistant to erosion and the impact of the molten metal stream (cast steel, cast iron, or non-ferrous metals).
- Mold sealing: Specialized cords and glues guarantee the absolute tightness of molds, preventing run-outs and uneven casting wall thicknesses.
- Easy destruction after casting: Core binders (e.g., oil-based) undergo planned burnout under the influence of heat, guaranteeing impeccable collapsibility of complex cores.
Extensive offer of PEDMO binders and foundry materials
We supply industry-recognized binding and sealing agents, as well as ready-to-use sands:
- Retanol L – a thermosetting, first-class oil core binder for preparing non-hygroscopic, highly complex cores.
- Oil C and Oil DL – thermosetting, high-performance oil/emulsion binders for cores in the production of cast iron, cast steel, and non-ferrous metals.
- Binder SK – a mixture of resin and hardener intended for shell molding and the production of resin-coated sand (invaluable for precision castings).
- Binder DEKO – a composition of an inorganic binding material and an organic substance, dedicated to molding sands and dry-sand molds.
- Bentonite S – an irreplaceable component of synthetic molding sands (greensand), ensuring the necessary moisture and viscosity.
- Specoll – an excellent, cold-setting, thixotropic foundry glue for joining cold and hot cores and sealing (cope and drag).
- Speseal – asbestos-free, permanently plastic sealing cords for mold halves and cores (prevent run-outs/flashes).
- Spefol – ready-to-use, red oil sand for precision molding (no drying required).
Key benefits for foundries
- Dimensional stability and safety – no risk of core deformation and precise reproduction of the part’s edges.
- Mold tightness – the use of proven sealants and glues (Speseal, Specoll) eliminates rejects due to leaks.
- Excellent core collapsibility – easy cleaning of the interior of complex blocks after the binder burns out.
- Comprehensive solution – full compatibility with the production of cast steel, cast iron, and aluminum.