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Patterns and Core boxes

KRÄMER+GREBE designs and manufactures patterns and core box tooling for small and large production series in various materials, complete with all technical casting and venting details.

We offer complete tools for your core shooting machine suitable for all core production techniques.

We produce individual, tailored tools to your exact requirements with all necessary accessories and to the highest standard of quality as core masks, for core package and green sand processes.

High degrees of freedom for complex geometries; excellent strength properties and high levels of dimensional accuracy characterise all manner of sand casting methods. Whether it is in a highly-automated high-volume process or for a small-scale premium series production, an intelligent tool concept paves the way for successful realisation.  Not only do the tool specialists at KRÄMER+GREBE create the entire layout with core division and core mark definition, they are also completely familiar with sophisticated slider technologies, close-contour temperature control solutions, perfect machine adaptation and alternative material specifications in all areas. In addition, the tools are weight optimised and are designed to be maintenance and repair friendly. In addition to expert knowledge, KRÄMER+GREBE draws on the latest CAx technology, so as to achieve the best possible design for each moulding tool.

Patterns

KRÄMER+GREBE manufactures high-quality patterns for small and large series production in all the required materials and with all the technical casting and ventilation details – in the shortest time and working in close collaboration.

Core box tooling

At KRÄMER+GREBE we offer tool solutions for all core box tooling. Our palette ranges from cold and hot box through croning tooling to entirely inorganic warm-box core tooling.

Sustainable trading and protection of the environment play a special role in many foundries. The production of castings on the basis of core production with inorganic binders offers outstanding possibilities here.

The use of hot core boxes as such is hardly an innovation in itself, yet the matching of the energy supply to the drying process requires close interaction between the design, simulation and process development divisions. The varying thermal stability of the binder systems, the different casting processes and the resultant variation in thermal loading of the cores result in different degrees of expansion and temperature stability of the cores. The hardening reaction takes place primarily through dehydration, that is, through the removal of water. In addition to high temperature, the moisture is also removed from the core box by means of a flow of hot air. Various methods are employed here. The exact matching of casting tools and the core box requires a high degree of attention, knowledge and experience, that KRÄMER+GREBE can offer.