In many production areas, workpieces are manufactured by automatic machine tools. This includes turning, grinding, honing or drilling machines. These machines consist as a rule of a work area, hydraulics room, tool magazine, transport area for the material input and output, and exhaust systems. If a fire starts, this can quickly spread to other production areas. Long interruptions to business and high costs are often the result.
From the operator’s point of view a solution is required which can detect emerging fires in good time and fight them in a targeted manner. Beyond this, a protection design is desirable that enables coordinated fire protection for production areas that merge into one another and at the same time is suitable for the protection of individual machine tools. Peripheral areas such as switch cabinets and oil processing should also be included in the fire protection scheme. Minimax has the corresponding compact solution: MachineToolProtect.
Advantages at a glance
To avoid longer operational outages from fire damage to machine tools, rapid fire detection and targeted extinguishing are crucial. Fire detection takes place in the inner areas of a machine tool by means of intelligent UniVario flame detectors and the fire control is handled by an extinguishing control panel.
Oxygen-displacing extinguishing gases are always the right choice if a residue-free extinguishing and consequently very rapid reactivation of the machine tool are to be achieved. The extinguishing gas is supplied in high-pressure steel cylinders in the vicinity of the machine tool. The extinguishing agent is fed via nozzles which are installed in the processing area of the machine. Since the extinguishing agent is only used in the machine, generally outside the machine there is no concentration that could be hazardous to people. For risks in light metal working the extremely inert noble gas argon is the only optimally usable extinguishing agent. In contrast to carbon dioxide and nitrogen, it can be used effectively with combustible metals.
To ensure reliable extinguishing, Minifog ProCon impulse nozzles are used in MachineToolProtect. Due to their relatively large outlet cross-sections they are less susceptible to impurities in the extinguishing water. As an additional safeguard, each nozzle is fitted with an internally situated fine mesh. Furthermore, a robust stainless steel protective cap with safety chain protects against contamination of the nozzle from the outside. Consequently, they are ideal for use in the tough environmental conditions of a machine tool.
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