Special commitment to the testing of education and training

26.05.2021

We are very happy about the compliment from the IHK!

Praise to everyone who gives their best for the success of the training and who have contributed to our trainees and our former trainees successfully completing their exams.

A really great achievement.

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Reliably prediction of tool abrasion during core shooting

27.02.2020

From February 12th – 13th, 2020, the Formstoff-Forum took place for the third time in Munich. The aim of this forum is to enable a close exchange of ideas between experts from research and industry.

Together with our development partner MAGMA, KRÄMER + GREBE was able to contribute to this Forum with an interesting presentation. Speaker Thomas Achenbach demonstrated the possibilities of an experimental analysis and subsequent modeling of tool wear on coreboxes.

“Due to the large number of influencing parameters, a core shooting simulation can currently predict only the qualitative wear”, said expert Thomas Achenbach, “With the help of this development project we hope to generate enough valuable data which will be used as basis to create models, in order to predict the quantitative wear on the tools”. In the course of this project, KRÄMER + GREBE has set up a test facility, where core shooting experiments can be carried out automatically with a high reproducibility.

MAGMA uses the data collected from the tests done as a basis for simulations. In addition, KRÄMER + GREBE has built up special knowledge by using different materials for the different tool requirements. This knowledge helps to keep improving our tools according the customer needs. In this way, we can continue to guarantee in the future the highest quality and state-of-the-art technology made by KRÄMER + GREBE.

With this development project we make a major contribution to the Industry 4.0 and are glad to have MAGMA as a committed partner at our side.

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New and highly effective Core-Drying Technology developed by KRÄMER+GREBE

5.11.2019

A process newly developed and patented by KRÄMER+GREBE can be used in the following cases for better core-drying performance. Currently, casting foundries mainly employ the polyurethane cold-box process to manufacture cores while inorganic core-making processes are gaining popularity. During the cold-box process, the reaction and the accelerated curing of the core are set off through the addition of a catalyst mixed with a carrier medium.
In inorganic core-making, however, this curing process is replaced by heating and purging with hot air, which causes water to evaporate and moisture to escape from the core box. It is a more complex and time-consuming process that is related to sand casting and curing, and is therefore subject to certain restrictions. This means that there are limitations on void spaces and geometry during inorganic core-making processes. Nevertheless, a compromise can be found between core filling and core curing.
Depending on the core geometry, an analysis can also show that the K+G core drying technology produces significant cycle time improvements in the cold box process.
The patented Core-Drying Technology is integrated into the core box and can be fitted in new or existing moulding tools.