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A new customer relationship between Kurtz Ersa and a foundry often begins with a special customer inquiry. In this specific case, the Metal Foundry Brückner received an inquiry for five different cast parts weighing between three and five kilograms in the summer of 2023. As their new customer held out the prospect of an annual order volume of at least 2,000 pieces each, the previous manufacturing process using sand casting was called into question and the company considered manufacturing with a permanent mold. Permanent mold casting is ideal for producing large quantities economically. As the cast parts are produced in outstanding, reproducible quality, this type of manufacturing is particularly suitable for parts that have to meet highest standards of dimensional accuracy. This was the case for Brückner´s new customer, as the cast parts in question had to meet high quality requirements for drive technology in boat building.
*Image courtesy of the MOLABO GmbH and the Helmut Hechinger GmbH & Co. KG
The strengths of the Metal Foundry Brückner are short delivery times, high quality, and flexibility. The main areas of application for the cast parts manufactured by Brückner are pump technology, electrical engineering, the furniture industry, as well as railroad technology. Continuous investment defies current crises and maintains the production site in Germany. In October 2023, the Metal Foundry Brückner was able to convince their customer after several preliminary discussions and also by presenting their references and received the order for the first three cast parts for boat building. First simulations followed at Brückner, but these revealed difficulties in the feeding behavior, particularly the formation of shrinkages in places where not permitted. These are cavities that form due to the shrinkage of the aluminum when the molten metal cools down and solidifies.
The tilt casting process achieves a much higher quality compared to sole gravity casting. Brückner proposed to produce three of the five cast parts using the tilt casting process in order to achieve highest quality parts. Several meetings were necessary to convince their customer of the benefits of tilt casting. During those meetings, the advantages of the process were explained and discussed in detail. The main advantage is the controlled filling via the tilting movement of the machine. The mold is filled at a moderate speed, thus reducing foaming. Less gate and feeder weight are required, which has a positive effect on the amount of aluminum required and results in a significant reduction in costs. Furthermore, higher unit weights with high complexity and with lower wall thicknesses can be realized more easily. The improved venting in tilt casting results in fewer air inclusions.
Once their customer was convinced of the tilt casting process, an external toolmaker provided insights into the optimal gating technology by creating simulations. The toolmaker also concluded that tilt casting was the ideal process for the three selected cast parts. In November 2023, the Metal Foundry Brückner began looking for a tilt casting machine that would be available at short notice. Up to 2023, Brückner always used the gravity casting process exclusively. The idea of expanding their own foundry to include tilt casting had been on the company´s mind for some time. So far, however, orders for cast parts demanding this procedure and therefore justifying this investment where missing. A reliable tilt casting system with a monitored and controlled casting process not only increases the efficiency and quality of the parts produced, but also opens the door to new markets thanks to the expansion of the machine park.
In December 2023, the time had finally come. Brückner contacted Kurtz Ersa, described its needs, and communicated the exact casting requirements of its customer. An intensive exchange about the requirements for the tilt casting machine began, with the desire to be able to produce very quickly. With a precision landing: Brückner received confirmation from its new customer on 22.12.2023 – the last working day before the Christmas holidays – that the cast parts should be produced using the tilt casting process. This meant that Kurtz Ersa also received the machine order from Brückner on 22.12.2023. In the new year, the realization of the project started at full speed. Numerous meetings between Brückner, their toolmaker and Kurtz Ersa were necessary to determine the optimal casting design. At the same time, the machine was produced at Kurtz Ersa´s main plant in Wiebelbach. In mid-June 2024, the time had finally come: the new tilt casting machine was delivered to the Metal Foundry Brückner in Zeulenroda-Triebes. The machine was aligned, anchored to the floor, and put into operation. Following the successful casting of the first samples in July, series production can now begin seamlessly.
The Kurtz Casting Solutions team would like to thank Brückner for the excellent cooperation
and trusting relationship during the project phase. We look forward to a long-term business
relationship with many more projects of this kind.
