Removable key enables safe entry
But to prevent this from happening in the first place, Fortress Interlocks' key transfer systems are also relied on in other areas. Thanks to their modular and robust design, amGardpro tumblers from Fortress Interlocks are particularly suitable for heavy-duty applications and can be effortlessly adapted to the customer's requirements. With the intelligent combination of key transfer system and operating elements, the amGardpro tumblers solve almost any safeguarding application up to SIL3 (EN/IEC 60261) category 4 and PL e (EN / ISO 13849-1). Another special feature is the Extracted Key function, which provides optimum protection by removing personal safety keys. The function is very simple: Before maintenance personnel enter the system, the safety key must be removed and taken into the system. If the safety door is closed unintentionally, the system cannot be started without the key. Furthermore, the purely mechanical safety door switch has saved wiring at some maintenance doors. The particularly robust switches from Fortress Interlocks can also boast a locking force of over 10000 kN, so that breaking of the tongue is impossible.
Complex casting process and cooling phase
Once the mold has been checked by the worker, it is finally cast on the casting line by a container filled with around 800-1000kg of molten iron. The container is maneuvered to the casting mold by a worker using a crane. Then the cooling phase begins, which is just as important for the success of the casting as the actual casting process. Depending on the material and mold, this can vary in time and must be precisely adhered to. For example, the system achieves a box output of approx. 12 boxes, but could even manage up to 30 boxes per hour with shorter cooling times. Once the "bale" - as the hardened casting together with the molding sand is called - has hardened, it is placed in a Vario vibrator. Here it is pressed out of the mold and freed from the coarse sand by forces of up to 4G during vibration. This falls down through grates and is recycled while the casting moves on. The finished casting is now removed, cleaned in a sandblasting unit and then further processed.