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.

KRÄMER+GREBE was an exhibitor at the WFO Technical Forum in Portorož, Slovenia

2.10.2019

This year’s WFO Technical Forum, held from 18 to 20 September 2019 in Portorož, Slovenia, saw KRÄMER+GREBE participate in the event as an exhibitor for the first time. With more than 400 participants from 27 countries, the Forum achieved a record number and provided an international platform for the company to present its work and its latest technology, as well as network with new and existing contacts.

On the last day of the event, the speaker from KRÄMER+GREBE, Jan Titze, gave a talk with the title “With sensors and actuators to autonomous foundry tools”. He explored casting process optimisation in detail through tooling with additional sensor technology and an integrated data management system, as well as greater casting process control flexibility using actuator technology. Finally, the talk included a brief look at the possibilities for individual and optimised production of cast parts in the future if these two areas of potential, sensor technology and actuator technology in the tool, are combined.

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