BS EN 422:2009 pdf download – Plastics and rubber machines — Blow moulding machines — Safety requirements

BS EN 422-2009 pdf download – Plastics and rubber machines — Blow moulding machines — Safety requirements 5.1.3 Emergency stop The emergency stop shall stop all movement but not necessarily the heating. The stop category shall be 0 or 1 according to EN 60204-1:2006 whichever provides the shorter rundown time. See 7.1.3. 5.1.4 Fluid systems Hydraulic and pneumatic systems shall be designed in accordance with respectively EN 982:1996 and EN 983:1996. The flexible hoses for hydraulic fluids under a pressure of more than 50 bar and for pneumatic fluids of more than 10 bar shall be secured to the machine by additional fastenings (for example chains) limiting the whiplash. On machines equipped with guards, this requirement does not apply to flexible hoses situated inside the guards. However, additional fastenings for flexible hoses for blowing fluids are also required inside the machine, except if the machine is safeguarded by interlocking guards with guard locking and the pressure in the pneumatic hoses is reduced to under 10 bar before the guard lock can be released. The PL r for this safety function shall be c. To avoid injury by ejected fluids accessible hoses and connections shall be covered by guards. For hydraulic or pneumatic accumulators the following shall apply. The operation of a protective device shall interrupt all power from accumulators for the blowing fluid or which are associated with dangerous movements. Actuation of the emergency stopping devices or disconnection of power to the machine shall isolate all power from accumulators for the blowing fluid or which are associated with dangerous movements. Where accumulators are integrated parts of the machine, unloading shall be initiated automatically. Visual indication of accumulator pressure shall be provided. Where hydraulic accumulators are integrated parts of the machine, the isolating valve or valves shall be position monitored. When the position monitoring system detects the valve or valves failing to isolate the accumulators, then: an optical or audible signal shall be given; and all accumulators connected with the failed valve or valves shall be automatically unloaded. Machines with hydraulic or pneumatic supply from an external source shall be provided with a manual isolation valve lockable by key. 5.1.5 Safeguards 5.1.5.1 Guards Guards shall be in accordance with EN 953. Guards located in areas where ejection of hot plastic can take place shall also contain the ejected material. If the movement of power operated guards can cause injury (force >...