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No-Bake

No-Bake: The cold curing process

Synthetic resins have been used since the early 1960s to produce moulds and cores for large and one-off castings.

Hüttenes-Albertus was one of the pioneers in the field of synthetic resins and has continuously developed the initially relatively simple formulas through intensive research – tailored to the requirements of our foundry customers around the world. Our founding fathers set important milestones in 1961 with the introduction of furanic cold-curing resins and in 1965 with the development of cold-curing phenolic resins. The introduction of these processes marks what is without doubt one of the foundry industry’s greatest milestones.

In order to meet the steadily growing demands of foundries and their customers in recent decades, we are continually refining our cold resins. In recent years, the term No-Bake has become established to describe this process.

What makes our binder systems so special

Significantly reduced emissions

e.g. through low-sulphur and BTeX-reduced systems

      Recycling management

      High reuse rate of basic moulding material.

          High productivity

          Controllable processes, low defect tendency, excellent casting results

              Compliance with environmental regulations

              and avoidance of hazardous ingredients e.g. via systems with a free formaldehyde content <0.05%.

                Our No-Bake product portfolio

                 

                Furan-Kaltharz

                This classical all-purpose method for production of nearly all types of castings features:

                  What its special features are:

                  • Low binder addition level
                  • Low viscosity
                  • Long storage life
                  • Good through curing
                  • Low odor
                  • Low emissions during sand mixing and mold filling. The permissible MAK (TLV) levels are generally underrun.
                  • Easily recoverable used sand
                  • Nitrogen-free grades of resins that are particularly suitable for high-quality steel castings
                  • Reactive, rapidly curing specialty resins offering short stripping times. Use of aggressive activators is consequently unnecessary
                  • Low-sulfur systems for high-quality ductile iron. The total sulfur level is nearly halved. This also offers a marked decrease in SO2 emissions during and after pouroff.

                   

                  Phenol-Kaltharz: Sinotherm

                  Particularly suitable for production of individual heavy castings of steel, gray iron and ductile iron, this method offers the following advantages:

                  • Low-nitrogen resins
                  • Long sand bench life
                  • Low overcure tendency
                  • Uniform curing
                  • Reduced pollutant liberation during curing due to low levels of free formaldehyde and phenol
                  • Easily recoverable used sand

                   

                  Polyurethane-Isocyanate: Pentex

                  Reactive system for short and medium series steel and aluminum casting. Environmentally compatible thanks to the use of new solvents, this method features:

                  • Short curing times despite a relatively lengthy sand bench life
                  • Low binder addition levels
                  • Unsurpassed sand flow
                  • Smooth, firm moldings
                  • Good separation from coreboxes
                  • Low odor nuisance
                  • Free of sulfur and phosphorous
                  • Good surfaces in steel casting, free of cracks

                   

                  Resole-Ester: Sinotherm 200

                  This method is used for high-quality steel castings, and features the following properties:

                    • Very good casting surfaces, particularly in steel casting, result in considerable reduction of finishing costs
                    • Free of nitrogen, sulfur and phosphorous
                    • Patterns are easily stripped
                    • Low pollutant emissions during curing and pouroff
                    • Low carbon uptake in steel casting
                    • Low tendency for heat cracking and finning
                    • Good collapse properties

                     

                    Best Practice

                    Mould and core production requires dependable binder systems in order to produce reliable and consistent hand-castings and large castings.

                    The following two examples perfectly illustrate our close collaboration with our customers in the development of precision product solutions.

                    Your contact

                    Dipl.-Ing.

                    Norbert Benz

                    Product Manager No Bake Binder Systems

                    E-Mail

                     

                    Christian Fourberg

                    Product Manager No Bake Binder System, Adhesives, Parting agents

                    E-Mail