BS EN 422-2009 pdf download.Plastics and rubber machines – Blow moulding machines Safety requirements.
— in the area of movement of the moulds;
between the guard or safety device and dangerous moving parts;
— through the discharge aperture.
4.3.2 Rotary machines
Crushing, shearing, drawing-in or impact due to movements of the rotating table.
Crushing, shearing, drawing-in or impact due to movements of the rotating table because of imbalance during
mould changing (only in the case of a horizontal axis of rotation).
4.4 Additional hazards when using ancillary equipment
Hazards are dependent on the type of ancillary equipment.
5 Safety requirements andlor protective measures
5.1 General
5.1.1 Basic requirements
Blow moulding machines shall comply with the safety requirements and/or protective measures of this clause. In addition, the machine shall be designed in accordance with the principles of EN ISO 12100 for relevant but not significant hazards which are not dealt with in this document.
The safety related parts of the control system shall be designed in accordance with EN ISO 13849-1:2006. The required performance level (PL1) for each safety function is specified below. See also 7.1.2.
Adjustment elements which must be adjusted during production shall be accessible from outside the danger zone. When these adjustment elements are higher than 2 m above floor level, permanent means of access according to EN ISO 14122 series shall be provided. Where a special tool is necessary for adjustment such a tool shall be supplied by the machine manufacturer.
5.1.2 Safety distances
For fixed guards or machine parts preventing access to the moving moulds (closing and transfer movements), EN ISO 13857:2008 Tables 2 and 4 shall be used. Tables I and 4 shall be used in all other cases.
Electro-sensitive protective equipment (ESPE) shall be positioned in accordance with EN 999:1998.
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 PLr 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 oi- 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> 150 N or pressure> 50 N/cm2). pressure sensitive edges in accordance with EN 1760-2:2001 shall be provided in order to either arrest or reverse the closing movement of the guard. Actuation of the sensitive edge shall arrest or reverse the closing movement 01 the guard in accordance with EN ISO 13849-1:2006 PL, = c. Reversing the movement shall not create further hazards.BS EN 422-2009 pdf download.