EN 869:2006

SLOVENSKI STANDARD
01-januar-2007
1DGRPHãþD
SIST EN 869:2000
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Safety of machinery - Safety requirements for pressure metal diecasting units
Sicherheit von Maschinen - Sicherheitsanforderungen an Metall-Druckgießanlagen
Sécurité des machines - Prescriptions de sécurité pour les chantiers de moulage des
métaux sous pression
Ta slovenski standard je istoveten z: EN 869:2006
ICS:
25.120.30 Livarska oprema Moulding equipment
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD
EN 869
NORME EUROPÉENNE
EUROPÄISCHE NORM
September 2006
ICS 25.120.30 Supersedes EN 869:1997
English Version
Safety of machinery - Safety requirements for pressure metal
diecasting units
Sécurité des machines - Prescriptions de sécurité pour les Sicherheit von Maschinen - Sicherheitsanforderungen an
chantiers de moulage des métaux sous pression Metall-Druckgießanlagen
This European Standard was approved by CEN on 6 August 2006.
CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European
Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national
standards may be obtained on application to the Central Secretariat or to any CEN member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by translation
under the responsibility of a CEN member into its own language and notified to the Central Secretariat has the same status as the official
versions.
CEN members are the national standards bodies of Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France,
Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania,
Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre: rue de Stassart, 36  B-1050 Brussels
© 2006 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 869:2006: E
worldwide for CEN national Members.

Contents Page
Foreword.5
Introduction .6
1 Scope.6
2 Normative references.6
3 Terms and definitions .8
4 List of significant hazards .11
4.1 General.11
4.2 Mechanical hazards.11
4.3 Electrical hazards/control system.12
4.4 Thermal hazards.12
4.5 Fire hazards.12
4.6 Noise hazards.13
4.7 Hazards caused by gases, vapours, fumes and dusts .13
4.8 Hazards generated by neglecting ergonomic principles in machinery design.13
4.9 Setting-up the diecasting machine .14
4.10 Falls from heights.14
4.11 Particular hazards with regard to cold-chamber diecasting machines .14
4.11.1 Bursting of slugs .14
4.11.2 Injection drive area.14
4.12 Particular hazards of diecasting machines with vertical closing movement.14
4.13 Particular hazards with regard to hot-chamber diecasting machines .14
4.13.1 Nozzle.14
4.13.2 Initiation of the casting process due to a fault in the control system.14
4.14 Hydraulics and pneumatics.14
5 Safety requirements and/or protective measures.14
5.1 General.14
5.2 Mechanical.15
5.2.1 General.15
5.2.2 Guards and protective devices for die area (see also 5.4.1) .15
5.2.3 Guards for the die closing mechanism area.17
5.2.4 Additional requirements for movable guards and access doors .17
5.2.5 Diecasting units.18
5.3 Electric equipment and control systems .18
5.3.1 Electric equipment.18
5.3.2 Safety related parts of the control system: General .18
5.3.3 Emergency stop functions.19
5.3.4 Safety related control system of the dangerous movements of the die.19
5.3.5 Safety related control system of the dangerous movements with closing safety device .19
5.3.6 Control of ancillary equipment.20
5.4 Measures against thermal hazards.20
5.4.1 Spurting of molten metal .20
5.4.2 Contact with hot surfaces.20
5.5 Hydraulics, pneumatics, combustible fluids .20
5.5.1 Hydraulics, pneumatics.20
5.5.2 Pressure fluids.20
5.5.3 Spray systems for release agents.20
5.5.4 Heat exchanger media.20
5.6 Noise.21
5.6.1 Noise sources.21
5.6.2 Noise reduction as a safety requirement.21
5.6.3 Noise emission measurement and declaration.21
5.7 Gases, vapours, fumes and dusts .21
5.8 Ergonomic aspects.22
5.9 Protective measures when setting-up diecasting machines, inserting and removal
appliances, tie bar pulling devices, and other ancillary equipment .22
5.9.1 Setting-up without protective devices for the die area .22
5.9.2 Movement of core pullers and ejectors.22
5.9.3 Movement of tie bar pulling devices .22
5.9.4 Movement of the plunger of cold chamber machines .22
5.10 Elevated working places.23
5.11 Additional protective measures for cold-chamber diecasting machines.23
5.11.1 Bursting and removal of slugs.23
5.11.2 Guards for the plunger area with vertical shot sleeve .23
5.11.3 Guards for the plunger area with horizontal shot sleeve.23
5.12 Additional protective measures for diecasting machines with vertical closing movement.23
5.13 Additional protective measures for hot-chamber diecasting machines .23
5.13.1 Metal spraying between nozzle and die .23
5.13.2 Movement of the injection piston .24
6 Verification of the safety requirements and/or protective measures .24
7 Information for use.25
7.1 General.25
7.2 Signals and warning devices .25
7.3 Accompanying documents.25
7.3.1 Instruction handbook.25
7.4 Marking.28
Annex A (informative) Examples .29
Annex ZA (informative) Relationship between this European Standard and the Essential
Requirements of EU Directive 98/37/EC.41
Bibliography.42

Figures
Figure A.1 — Example of a hot chamber diecasting machine (can be manufactured with a horizontal or a
vertical die closing system) .29
Figure A.2 — Example of a horizontal cold-chamber diecasting machine (can be manufactured with a
horizontal or a vertical die closing system) .29
Figure A.3 — Example of a vertical cold-chamber diecasting machine with vertical shot-end (can be
manufactured with a horizontal or a vertical die closing system).30
Figure A.4 — Examples of mechanical hazards and danger zones .30
Figure A.5 — Examples of danger zones for metal spraying at horizontal cold-chamber machines.31
Figure A.6 — Examples of danger zones for metal spraying at vertical cold-chamber machines with vertical
shot-end.31
Figure A.7 — Examples of danger zones for metal spraying at hot-chamber machines.32
Figure A.8 — Distance between the guard and machine frame according to 5.2.2.1.32
Figure A.9 — Example of guarding the hazardous area of a diecasting cell .33
Figure A.10 — Example for a closing safety device with positively actuated hydraulic valve, see 5.3.5.1 a). 34
Figure A.11 — Example for a closing safety device with positively actuated pilot valve, see 5.3.5.1 b) . 35
Figure A.12 — Example for a closing safety device with positively actuated limit switch which drives the shut-
off valve, see 5.3.5.1 c) . 36
Figure A.13 — Example for a closing safety device with positively actuated limit switch which drives a pilot
valve, see 5.3.5.1 c) . 37
Figure A.14 — Example of safety related control system with closing safety device for closing units, see
5.3.5.1 d). 38
Figure A.15 — Example of safety related control system with closing safety device for closing units, see
5.3.5.1 d). 39
Figure A.16 — Example of additional requirements on the hydraulic control of machines with vertical closing
movement against pressure peaks and gravity (for electrical interlocking and monitoring, see Figures
A.10 to A.15. 40

Tables
Table 1 — Methods of verification . 24
Table 1 (continued) . 25

Foreword
This document (EN 869:2006) has been prepared by Technical Committee CEN/TC 202 “Foundry machinery”,
the secretariat of which is held by DIN.
This European Standard shall be given the status of a national standard, either by publication of an identical
text or by endorsement, at the latest by March 2007, and conflicting national standards shall be withdrawn at
the latest by March 2007.
This document supersedes EN 869:1997
This document has been prepared under a mandate given to CEN by the European Commission and the
European Free Trade Association, and supports essential requirements of EU Directive(s).
For relationship with EU Directive(s), see informative Annex ZA, which is an integral part of this standard.
An assessment of the foreseeable risks arising from the use of the machinery was carried out when this
standard was drafted by CEN/TC 202/WG 1, comprising experts from the following countries: Germany, Italy,
Spain, Sweden and Switzerland.
According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following
countries are bound to implement this European Standard: Austria, Belgium, Cyprus, Czech Republic,
Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania,
Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden,
Switzerland and United Kingdom.
Introduction
This document is a type C standard as stated in EN ISO 12100.
The machinery concerned and the extent to which hazards, hazardous situations and hazardous events are
covered are indicated in the scope of this document. When provisions of this type C standard are different
from those which are stated in type A or B standards, the provisions of this type C standard take precedence
over the provisions of the other standards, for machines that have been designed and built according to the
provisions of this type C standard.
1 Scope
This European Standard specifies the safety requirements for pressure metal diecasting units.
It applies to pressure diecasting machines and to the interfaces with the following ancillary equipment:
 die,
 melting, holding and dosing furnaces (see EN 746-1),
 metal feeding equipment,
 inserting and removal devices,
 spraying appliances,
 heat exchanger for the die.
This ancillary equipment itself is not covered.
Additional risks arising from the material being cast are not covered.
This standard does not apply to low pressure diecasting machines and/or gravity diecasting machines.
This standard deals with all significant hazards, hazardous situations and events relevant to pressure
diecasting machines when used as intended and under conditions of misuse which are reasonably
foreseeable by the manufacturer (see Clause 4). It provides the requirements to be met by the manufacturer
to ensure the safety of persons and property during transport, commissioning, use, de-commissioning and
maintenance periods, as well as in the event of foreseeable failures or malfunctions that can occur in the
equipment.
This document is not applicable to pressure metal diecasting units/machinery which are manufactured before
the date of its publication as EN.
2 Normative references
The following referenced documents are indispensable for the application of this document. For dated
references, only the edition cited applies. For undated references, the latest edition of the referenced
document (including any amendments) applies.
EN 294:1992, Safety of machinery — Safety distance to prevent danger zones being reached by the upper
limbs
EN 349, Safety of machinery — Minimum gaps to avoid crushing of parts of the human body
EN 418, Safety of machinery - Emergency stop equipment, functional aspects - Principles for design
EN 574:1996, Safety of machinery — Two-hand control devices — Functional aspects — Principles for design
EN 614-1, Safety of machinery - Ergonomic design principles - Part 1: Terminology and general principles
EN 614-2, Safety of machinery — Ergonomic design principles — Part 2: Interactions between the design of
machinery and work tasks
EN 894-1, Safety of machinery — Ergonomic requirements for the design of displays and control actuators —
Part 1: General principles for human interactions with displays and control actuators
EN 894-2, Safety of machinery — Ergonomics requirements for the design of displays and control
actuators — Part 2: Displays
EN 894-3, Safety of machinery — Ergonomics requirements for the design of displays and control
actuators — Part 3: Control actuators
EN 953:1997, Safety of machinery - Guards - General requirements for the design and construction of fixed
and movable guards
EN 954-1:1996, Safety of machinery — Safety related parts of control systems — Part 1: General principles
for design
EN 982, Safety of machinery - Safety requirements for fluid power systems and their components – Hydraulics
EN 983, Safety of machinery - Safety requirements for fluid power systems and their components -
Pneumatics
EN 999, Safety of machinery — The positioning of protective equipment in respect of approach speeds of
parts of the human body
EN 1088:1995, Safety of machinery — Interlocking devices associated with guards - Principles for design and
selection
EN 1265, Noise test code for foundry machines and equipment
EN 13861, Safety of machinery — Guidance for the application of ergonomics standards in the design of
machinery
EN 1760-2, Safety of machinery - Pressure sensitive protective devices - Part 2: General principles for the
design and testing of pressure sensitive edges and pressure sensitive bars
EN 60204-1:1997, Safety of machinery — Electrical equipment of machines — Part 1: General requirements
(IEC 60204-1:1997).
EN 61310-1, Safety of machinery — Indication, marking and actuation — Part 1: Requirements for visual,
auditory and tactile signals (IEC 61310-1:1995)
EN 61310-2, Safety of machinery - Indication, marking and actuation - Part 2: Requirements for marking (IEC
61310-2:1995)
EN ISO 11688-1, Acoustics — Recommended practice for the design of low-noise machinery and
equipment — Part 1: Planning (ISO/TR 11688-1:1995)
EN ISO 12100-1:2003, Safety of machinery - Basic concepts, general principles for design - Part 1: Basic
terminology, methodology (ISO 12100-1:2003)
EN ISO 12100-2:2003, Safety of machinery - Basic concepts, general principles for design - Part 2: Technical
principles (ISO 12100-2:2003)
EN ISO 14122-1, Safety of machinery — Permanent means of access to machinery — Part 1: Choice of a
fixed means of access between two levels (ISO 14122-1:2001)
EN ISO 14122-2, Safety of machinery - Permanent means of access to machinery - Part 2: Working platforms
and walkways (ISO 14122-2:2001)
EN ISO 14122-3, Safety of machinery - Permanent means of access to machinery - Part 3: Stairs, stepladders
and guard-rails (ISO 14122-3:2001)
ISO 7000, Graphical symbols for use on equipment - Index and synopsis
3 Terms and definitions
For the purposes of this document, the terms and definitions given in EN ISO 12100-1:2003 and the following
apply.
NOTE Definitions used in EN and ISO standards referred to in this document are also valid for this document.
3.1
casting
to cast a component/product by the use of pressure diecasting
3.2
diecasting
a process in which molten metal is injected into a die and held under pressure until complete solidification
3.3
diecasting machine
a machine that injects molten metal under high pressure into a parted die which is connected to the platens of
the machine
3.4
diecasting unit
a diecasting machine, together with ancillary equipment, which form a complete production unit
3.5
ancillary equipment
devices which automatically carry out process functions additional to those of the diecasting machine itself,
e. g., feeding the metal, removing the castings, spraying the die
3.6
metal
the material being cast
3.7
hot-chamber diecasting machine
diecasting machine having the shot sleeve and plunger submerged in the molten metal of the furnace (see
Figure A.1)
3.8
cold-chamber diecasting machine
diecasting machine where molten metal is delivered to the shot sleeve in measured amounts from a separate
furnace
3.9
horizontal cold-chamber diecasting machine
cold-chamber diecasting machine with the shot sleeve mounted horizontally (see Figure A.2)
3.10
vertical cold-chamber diecasting machine
cold-chamber diecasting machine with the shot sleeve mounted vertically (see Figure A.3)
3.11
die closing system
assembly which opens and closes the die and holds the die against the force exerted on the metal during
injection and solidification
3.12
injection system
assembly which forces metal from the shot sleeve into the die and applies pressure to the metal during
solidification
3.13
ejector system
assembly which ejects castings from the die cavity
3.14
core puller
assembly which controls movements of cores
3.15
automatic tie bar puller
device for automatically pulling tie bars in order to facilitate die set-up procedure
3.16
automatic ejector coupler
device for automatically coupling the ejector plate of the machine with the ejector device of the die
3.17
automatic die clamper
device for automatically clamping the die to the platens of the machine
3.18
fixed platen
platen to which the fixed die-half and the metal injection system are connected
3.19
moving platen
platen to which the moving die-half is connected
3.20
cylinder platen (also known as thrust platen, reaction platen, rear platen)
platen to which the die closing mechanism and the closing cylinder are connected
3.21
tie bar
bars which carry the locking load and guide the moving platen
3.22
injection drive
system, e. g., hydraulic, which moves the plunger and applies force to it
3.23
shot sleeve
cylindrical container of a cold-chamber diecasting machine in which pressure is applied to molten metal
3.24
plunger
piston which forces metal from the shot sleeve into the die and applies pressure to the metal during
solidification
3.25
plunger rod
rod which joins the plunger to the injection drive
3.26
gooseneck (hot-chamber diecasting machine)
that part of an injection system (containing the shot sleeve and metal flow channel) which is submerged in
molten metal
3.27
nozzle
connection between the gooseneck and the fixed die-half
3.28
slug
metal surplus which solidifies in the cold-chamber shot sleeve and is ejected with the casting
3.29
ejector plate
part which transmits movement to the ejector device of the die
3.30
ejector rod
part which joins the ejector plate of the machine to the ejector device of the die
3.31
die area
area between fixed platen and moving platen
3.32
die closing mechanism area
area between moving platen and cylinder platen
3.33
injection drive area
area between fixed platen and shot cylinder
3.34
closing safety device
device, actuated by the movable guard, which prevents the die from closing if a failure occurs in the control
system
3.35
setting
operating mode where any step in the process can be selected and hand operated in any sequence (e. g., to
perform individual steps of the process (not necessarily in operating cycle sequence), e. g., like changing a
die)
3.36
manual
operating mode where the individual steps in the machine cycle are hand initiated in a predetermined order
(e. g., to perform individual steps of the process (only in the sequence which is fixed by the program), e. g.,
like to finish the casting cycle or to run the casting cycle in order to examine or to look for faults)
3.37
semi-automatic
operating mode where each cycle is hand initiated but thereafter automatically proceeds to completion (e. g.,
to produce castings in which at least one of the steps of the process which is performed outside the machine
is executed by the operator)
3.38
automatic
operating mode where the completion of a casting cycle initiates the next casting cycle (e. g., to continuously
produce castings with any external process steps being automatically carried out by ancillary device)
3.39
machine-setter
designated person, trained and skilled to carry out setting and starting-up the diecasting process
3.40
operator
designated person, trained and skilled to run the diecasting machine
4 List of significant hazards
4.1 General
This clause contains all the significant hazards, hazardous situations and events, as far as they are dealt with
in this document, identified by risk assessment as significant for this type of machinery and which require
action to eliminate or reduce the risk.
If, because of the special design of a diecasting machine and/or its ancillary equipment, additional hazards
can be present, then an additional risk assessment shall be made.
4.2 Mechanical hazards
Mechanical hazards at diecasting machines and at their ancillary equipment can occur because of the design
of the machine (e. g., risk of stumbling and striking) and because of dangerous movements (e. g., crushing,
shearing).
Dangerous movements include:
 movement of the die;
 movement of the core pullers;
 movement of the ejectors;
 movement of the ancillary equipment;
 movement of the injection system;
 movement of the power operated guards;
 movement of the toggles and holding-up devices;
 movement of the tool clamping devices;
 movement of the tie bar pulling devices.
Some principal examples of mechanical hazards and danger zones are shown in Figure A.4.
The bursting of reservoirs, pipelines and flexible hoses containing pressurised fluids can cause hazards.
4.3 Electrical hazards/control system
4.3.1 Electrical hazards at diecasting machines can occur, e. g., by:
 electrical contact, direct or indirect;
 external influences on electrical equipment;
 damage by thermal radiation or other phenomena such as projection of molten metal particles.
4.3.2 Failures which cause unexpected machine movements can occur in the electric/electronic control
system and/or in the hydraulic or pneumatic control system.
4.4 Thermal hazards
Heat hazards which can occur at diecasting machines by:
 spraying or flowing out of molten metal, e. g.,
 out of the parting-line of the die (see Figures A.5, A.6 and A.7); or
 between shot sleeve and plunger (see Figures A.5 and A.6);
 between nozzle and die (see Figure A.7);
 bursting of slugs;
 contact with structural components of the machine which are heated by the process;
 contact with ancillary equipment which are used to heat the working substances or dies;
 release of hot operating fluids;
 heat radiated from furnaces.
4.5 Fire hazards
Fire hazards result from the presence of a combination of molten metal, heating devices, hot surfaces and
combustible material, e. g., flammable greases, flammable hydraulic fluids and pressurized combustible
release agents in case of a line break.
4.6 Noise hazards
Noise generated by pressure metal diecasting units can result in:
 permanent hearing loss;
 tinnitus;
 tiredness, stress etc.;
 other effects such as loss of balance, loss of awareness;
 interference with speech communication;
 inability to hear acoustic warning signals.
4.7 Hazards caused by gases, vapours, fumes and dusts
Hazards caused by dangerous gases, vapours, fumes and dust can occur at diecasting machines, e. g.,
 by use of lubricants;
 by use of release agents;
 by fumes, vapours and dust given off when melting and holding some types of metal, e. g., lead alloys;
 during cleaning.
4.8 Hazards generated by neglecting ergonomic principles in machinery design
Health can be impaired by neglecting ergonomic principles. Possible causes of injury are:
4.8.1 incorrect lifting of heavy loads due to the design of the machine, e. g., during
 setting up the diecasting machine;
 maintenance of the diecasting machine;
 manual removing of the castings.
4.8.2 work with repetitive motion, e. g.,
 manual feeding of molten metal;
 manual removing of the castings.
4.8.3 poor working postures due to, e. g.,
 wrong height of operating panel;
 wrong position of operating panel;
 poor access for maintenance and setting-up.
4.9 Setting-up the diecasting machine
The deactivation of some protective devices which can be necessary in order to allow setting-up to be carried
out can give rise to additional hazards.
4.10 Falls from heights
This hazard can occur at diecasting machines when people work above ground level or over pits either during
normal operation, setting-up or for maintenance purposes.
4.11 Particular hazards with regard to cold-chamber diecasting machines
4.11.1 Bursting of slugs
Slugs can burst, if they are not sufficiently solidified before being ejected from the shot sleeve.
4.11.2 Injection drive area
In the case of cold-chamber diecasting machines metal flashing and mechanical hazards can occur in the
injection drive area between shot sleeve and plunger.
The principal danger areas for spraying metal are shown in Figures A.5 and A.6.
4.12 Particular hazards of diecasting machines with vertical closing movement
Hazards can occur on diecasting machines with a vertical closing movement because the die can fall under its
own weight.
4.13 Particular hazards with regard to hot-chamber diecasting machines
4.13.1 Nozzle
Metal spraying can occur if the nozzle is not firmly sealed to the die or to the gooseneck.
The principal danger zones for hazards caused by metal spraying are shown in Figure A.7.
4.13.2 Initiation of the casting process due to a fault in the control system
Metal spraying can occur if a fault causes metal to be injected with the die open.
4.14 Hydraulics and pneumatics
Hazards due to the presence of hydraulic and pneumatic pressure can occur.
5 Safety requirements and/or protective measures
5.1 General
Machinery shall comply with the safety requirements and/or protective measures of this clause.
In addition, the machine shall be designed according to the principles of EN ISO 12100-2 for relevant but not
significant hazards which are not dealt with by this document.
For application of type B standards such as EN 294, EN 349, EN 418, EN 574, EN 60204-1, the manufacturer
shall carry out an adequate risk assessment to establish the requirements of that standard which are to be
applied (as far as the choice is not made in the requirements of this clause).
NOTE The requirements of this standard and the described solutions are considered to offer an acceptable safety
level. This does not exclude that other solutions can be acceptable if they offer an equivalent level of safety.
The manufacturer of the pressure diecasting machine shall make provisions necessary for the integration of
the ancillary equipment required for the intended use of the pressure diecasting unit.
5.2 Mechanical
5.2.1 General
Guards and protective devices shall be designed according to EN ISO 12100 parts 1 and 2 and EN 953. The
safety distances shall be in accordance with Table 2 and Table 4 of EN 294:1992, EN 349 and EN 999.
Guards and protective devices shall be designed so that they do not themselves cause hazards.
If a guard is power operated it shall not create a trap. Either the power provided shall be insufficient to cause
injury in the event of trapping, or the guards shall be provided according to EN 1760-2 with a trip device at its
leading edge to prevent injury. Actuation of the trip device shall stop or reverse the direction of movement of
the movable guard. The trip device shall comply with at least category 1 of EN 954-1:1996.
5.2.2 Guards and protective devices for die area (see also 5.4.1)
5.2.2.1 Access from front and back of the machine to the die area, shall be prevented by movable guards
and, if necessary, with supplementary fixed guards in order to avoid injuries caused by movements, e. g., of
the die, the core pullers and die sprayers (see Figure A.8). Persons shall be prevented from staying between
the guard and the machine frame when the guards are closed.
Suitable measures are (see Figure A.8):
a) reduction of the distance between movable guards and the machine frame to max. 100 mm. The
protective effect shall be achieved by the shape of the lower part of the guard itself over the whole length
of the guard (see Item 1 in Figure A.8) or by shaping the front edge of the guard so that during opening
and closing never the distance of 100 mm is exceeded;
or
b) movable guards and supplementary protective devices which shall protect the area between the guard
and the machine frame against persons getting behind the guard, if the distance between the guards and
the machine frame exceeds 100 mm (see left-hand side of Figure A.8).
The supplementary protective device which protects persons getting behind the guard could be, e. g., a
type 4 electro-sensitive protective device according to EN 61496-1 or an electromechanical or hydraulic-
mechanical trip device with self-monitoring according to category 4 of EN 954-1:1996.
If electro-sensitive protective devices are used as a supplementary protective device they shall be
designed and arranged so that
1) the devices shall be operational as long as the diecasting machine is operational;
2) the devices shall not act as control devices with a start function;
3) the devices shall not be easily adjustable either in the vertical or in the horizontal direction by the
operator;
4) the devices are interlocked with dangerous movements of the diecasting machine and its ancillary
equipment.
If, for technical reasons (mainly for big-sized machines), the options a) and b) cannot be fulfilled, the closing of
a powered guard shall only be possible with a hold-to-run control device located at a position with a good view
of the die area.
5.2.2.2 Whole-body access to the die area
Diecasting machines with a clear vertical distance between the tie bars greater than 1 200 mm, where it is
reasonably foreseeable that persons will enter the die area without complete shut-down of the machine, shall
have measures taken for preventing the closing of the die when a person is in the die area (see also 7.2.1 d)).
Suitable measures are
a) a lockable control device mounted close to the access door(s). This device shall bring the machine to a
special access mode where no initiation of a closing movement is possible,
or
b) lockable devices to prevent unexpected closing movement of the die by switching off the power supply
for the closing valves, in accordance with 5.4 of EN 60204-1:1997. These devices shall be located on
both sides of the machine, inside the fence in case a distance guard safeguards the machine and its
ancillary equipment and at a location with a good view on the die area. Switching on the device shall not
by itself initiate any movement,
or
c) a mechanical restraint device in the die area, automatically or manually operated, preventing the closing
of the die. This device shall be interlocked with the closing movement,
or
d) a mechanical restraint device preventing the closing of the guard,
or
e) a device for switching-off the hydraulic pump in accordance with 5.4 of EN 60204-1:1997. The device for
switching-off shall be located close to the access door.
Related parts of the control system shall be in accordance with category 4 of EN 954-1:1996.
Where ancillary equipment can be dangerous for a person present in the die area, the measures taken shall
also prevent the functioning of these equipment.
5.2.2.3 The interlocking of the movable guards for the die area shall use a combination of:
a) a positive and non-positive mode association of mechanically actuated position detectors in accordance
with 5.4.1 of EN 1088:1995,
and
b) an additional closing safety device in accordance with 5.3.6.
The mechanically actuated detectors can be replaced with non-mechanically operated detectors if the safety
achieved is not less than obtained with mechanical detectors, in accordance with 6.3.1 of EN 1088:1995.
5.2.3 Guards for the die closing mechanism area
Access to the die closing mechanism area shall be prevented by interlocking movable guards. The movable
guards shall either
a) be interlocked with the power supply for the dangerous movements (e. g., switch off the hydraulic pump
and release the pressure of the accumulators). The relevant part of the control system shall have a safety
category of not less than 1 in accordance with EN 954-1. Restarting the machine shall only be possible if
the guard for the closing mechanism area is closed;
or
b) be interlocked with the control system. Opening of the guards shall stop all dangerous movements. The
relevant part of the control system shall have a safety category of not less than 3 in accordance with
EN 954-1. Restarting the dangerous movement shall only be possible if the guard for the closing
mechanism area is closed. Movements of the ejector system with guard open are allowed, if,
1) for machines with a clear vertical distance between the tie bars up to 1 200 mm, the dangerous
movements are restricted as stated in 5.9.2;
2) for machines with a clear vertical distance between the tie bars greater than 1 200 mm, the
conditions of 1) shall be fulfilled and additionally the speed of the ejector shall be reduced to 30 mm/s.
The parts of the control system related to the speed reduction shall be at least category B in
accordance with EN 954-1.
Fixed guards can be used for the die closing mechanism area if no frequent access is required (e. g., access
less than once a shift, according to EN 953:1997; 6.4.3.1).
5.2.4 Additional requirements for movable guards and access doors
5.2.4.1 General
Movable guards and access doors, see 5.2.5, shall be interlocked with the control system in such a manner
that
5.2.4.2 Closing movements of the die and positioning movements of core pullers can only be initiated if
the movable guards for the die area and for the die closing mechanism area and the access doors are closed.
The opening movement of the platen with the die area guard open shall only be possible if it is impossible to
reach in these conditions the crushing and shearing points behind the moving platen.
5.2.4.3 Ejector movement shall only be possible with the guards
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