EN 12301:2000+A1:2008

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Stroji za predelavo gume in plastike - Kalandri - Varnostne zahteveKunststoff- und Gummimaschinen - Kalander - SicherheitsanforderungenMachines pour les matières plastiques et le caoutchouc - Calandres - Prescriptions de sécuritéPlastics and rubber machines - Calenders - Safety requirements83.200Oprema za gumarsko industrijo in industrijo polimernih materialovEquipment for the rubber and plastics industriesICS:Ta slovenski standard je istoveten z:EN 12301:2000+A1:2008SIST EN 12301:2000+A1:2008en01-november-2008SIST EN 12301:2000+A1:2008SLOVENSKI
STANDARD
EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 12301:2000+A1
September 2008 ICS 83.200 Supersedes EN 12301:2000 English Version
Plastics and rubber machines - Calenders - Safety requirements Machines pour les matières plastiques et le caoutchouc - Calandres - Prescriptions de sécurité
Kunststoff- und Gummimaschinen - Kalander - Sicherheitsanforderungen This European Standard was approved by CEN on 24 April 2000 and includes Amendment 1 approved by CEN on 8 June 2008.
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 CEN Management Centre 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 CEN Management Centre has the same status as the official versions.
CEN members are the national standards bodies of Austria, Belgium, Bulgaria, 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.
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Examples of different types of calenders.36 Annex B (informative)
Examples of calendering processes.37 Annex C (informative)
Hazards generated by the materials being processed.39 Annex D (informative)
Calculation of dimension L of the trapping zone (for rolls of equal diameters).40 Annex E (informative)
Fixed guards at the trapping zone.41 Annex F (informative)
Example of a particular type of guard with limited movement preventing access to the trapping zone.42 Annex ZA (informative)
!!!!Relationship between this European Standard and the Essential Requirements of EU Directive 98/37/EC"""".43 Annex ZB (informative)
!!!!Relationship between this European Standard and the Essential Requirements of EU Directive 2006/42/EC"""".44 Bibliography.45
• addition of Annex ZB. • editorial changes of EN 292-1:1991 to EN ISO 12100-1:2003 and of EN 292-2:1991 to EN ISO 12100-2:2003 in the following clauses and sub-clauses: Introduction, 2, 5.1.1.3.3, 5.1.1.7, 5.1.1.8, 5.1.1.10, 5.2.2, 5.3.2, 5.4.1, 5.4.2, 5.8, Table 1, 7, 7.1, 7.1.1d), 7.2, C.2.
• minor changes of sub-clauses 5.4.2, second indent and 7.2, second and third indents.
This document supersedes EN 12301:2000. The start and finish of text introduced or altered by amendment is indicated in the text by tags ! ". This European Standard 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 Annexes ZA and ZB, which are integral parts of this document." The annexes A to F are informative. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, 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
of access to machines and industrial plants – Part 1: Choice of a fixed means of access between two levels prEN 12437-2:1996, Safety of machinery - Permanent means of access to machines and industrial plants – Part 2: Working platforms and gangways prEN 12437-3:1996, Safety of machinery - Permanent means of access to machines and industrial plants – Part 3: Stairways, stepladders and guard-rails prEN 12437-4:1996, Safety of machinery - Permanent means of access to machines and industrial plants – Part 4: Fixed ladders EN 60204-1:1997, Safety of machinery - Electrical equipment of machines - Part 1: General requirements (IEC 60204-1:1997) EN 60529:1991, Degrees of protection provided by enclosures (IP Code) (IEC 60529:1989) EN 61310-1:1995, Safety of machinery - Indication, marking and actuation - Part 1: Requirements for visual, auditory and tactile signals (IEC 61310-1:1995) EN 61496-1:1998, Safety of machinery - Electro-sensitive protective equipment - Part 1: General requirements and tests (IEC 61496-1:1997) EN ISO 3743-1:1995, Acoustics - Determination of sound power levels of noise sources - Engineering methods for small movable sources in reverberant fields - Part 1: Comparison method for hard-walled test rooms (ISO 3743-1:1994) SIST EN 12301:2000+A1:2008

3 Terms and definitions For the purposes of this standard the following definitions apply: SIST EN 12301:2000+A1:2008

3.1 calender a machine for processing rubber, plastics, solutions or dispersions by continuous drawing between two or more rolls. The rolls are supported at both ends by a frame. The processing operations may be, for example:  continuous calendering of sheets or profiles of rubber or plastics;  application of one or more sheet(s) or layer(s) onto a web;  laminating of two or more sheets of rubber or plastics under pressure or by using heat or adhesive;  embossing of plastics. Figure 1 shows a typical calendering sequence and the positions of most of the components and zones defined hereafter. In this illustration the reference numbers correspond to the subclause numbers of clause 3.
3.2 Frame 3.5.3 Feeding devices 3.3 Calender rolls 3.8 Nip adjusting devices 3.4 Secondary rollers 3.9 Feed zones 3.5.1 Cutting devices 3.10 Discharge zone 3.5.2 Stock guides 3.11 Working zones Figure 1 — Example of a 4-roll calender showing the materials circuit for bilateral coating of (textile or metallic) fabric or cords
Annex A shows examples of various types of calenders. SIST EN 12301:2000+A1:2008

 slow speed vl: roll speed for production start-up;  maximum speed vmax: highest roll speed given by the manufacturer;  production speed vp: speed between vl and vmax;  reduced speed vr: roll speed used when approach by the operator is necessary for production purposes 3.7 stopping angle the angle through which the fastest calender roll rotates during the time between actuation of the safety device or emergency stop actuator and bringing the rolls to rest by braking SIST EN 12301:2000+A1:2008

X, S and L: Dimensions defining the trapping zone Figure 2 — Trapping zone at the calender rolls 3.13 danger zone at the calender rolls a danger zone exists on a calender when access to the trapping zone defined in 3.12 is not prevented by a protective structure placed in the immediate vicinity of the trapping zone. The danger zone is the volume at the inrunning side of the rolls circumscribed by the length X of the rolls and the shaded cross-section (figures 3 and 7a). This section is delimitated by:  the line dimensioned S at the entrance to the trapping zone (see 3.12);  the two arcs of circle on the calender rolls corresponding with the specified stopping angle α (see 3.7);  the arc of a circle whose centre is the middle of the line dimensioned S and whose radius F is equivalent to the length of the arcs of circle on the calender rolls corresponding with the specified stopping angle α.
Figure 3 — Danger zone at the calender rolls 4 List of hazards 4.1 Mechanical hazards Figure 4 illustrates the locations of the principal mechanical hazards, shown as an example on a 4-roll calender. In this illustration the reference numbers correspond to the sub-clause numbers of clause 4.
Figure 4 — Locations of principal mechanical hazards shown as an example on a 4-roll calendar 4.1.1 Hazard of drawing-in and/or crushing between the calender rolls or between a calender roll and the material  during start-up;  in forward movement during production operations;  during reverse operation;  during cleaning or polishing operations;  during machine setting, process changeover, fault finding, and maintenance operations. SIST EN 12301:2000+A1:2008

Figure 5a — The finger tips of the operator are outside the danger zone
Figure 5b −−−− The finger tips enter the Figure 5c −−−− The finger tips danger zone: braking is triggered by have reached the trapping zone: actuation of the trip bar by the the calender rolls have stopped operator's body Figure 5 - Stopping of the calender rolls by actuation of a trip device (in this case a trip bar as in 5.1.1.4) 1 Calender rolls 2 Trapping zone 3 Danger zone 4 Trip bar 5 Operator SIST EN 12301:2000+A1:2008

Figure 6 — Positioning of the trip bar 1: Trip bar (in rest position) L: depth of trapping zone (see 3.12 and annex D) F: length equivalent to the stopping arc length at vmax (Linear dimensions in mm, α in radians) SIST EN 12301:2000+A1:2008

F = length of arc α Fr = length of arc αr F = 360π Dα
(α in degrees) Fr
= 360π Dαr
(αr degrees) F = 2D α (α in radians) Fr
= 2D αr (αr in radians)
Figure 7a −−−− Dimensions of the Figure 7b −−−− Dimensions of the smaller danger zone danger zone Figure 7 — Danger zone and reduction of the danger zone Access to the smaller danger zone shall be prevented by a combination of two safety devices as shown in Figure 8. SIST EN 12301:2000+A1:2008

Zone I Free access zone, from where zone IV cannot be reached by the upper limbs Zone II Zone into which bodily access is allowed when the rolls rotate at reduced speed vr Zone III Zone into which upper limb access is allowed when the rolls rotate at a speed greater than vr Zone IV Danger zone (3.13) into which upper limb access is allowed when the rolls rotate at reduced speed vr Zone V Danger zone of reduced dimensions in which access is prohibited in all cases Figure 8 — Combination of two safety devices The combined safety devices shall perform as follows:  A movement of the operator from zone I to zone II shall cause stopping of the calender rolls by actuation of the safety device 1 when the rolls are running at a speed greater than vr. A movement of the operator from zone I to zone II when the rolls are running at vr shall not generate a stop command;  Reaching zone V with the upper limbs shall cause stopping of the calender rolls by involuntary actuation of the safety device 2. This device shall be a trip bar as specified in 5.1.1.4, positioned as in figure 6 but with α replaced by αr;  Increasing the speed of the calender rolls from vr to vp shall be possible only via a manual control and after the operator has returned from zone II to zone I. Return of the operator from zone II to zone I shall be signalled by actuation of an acknowledgement switch located in zone I in such a position that it cannot be operated from zone II. The acknowledgement signal shall be given from a position affording a clear view of zone II, if necessary by means of aids to vision. See also 7.1.2c. 1 Safety device 1: Device further from the danger zone (guard or safety device specified in 5.1.1.2)
2 Safety device 2: Device closer to the danger zone (trip bar specified in 5.1.1.4)
the working zones. The actuation of any emergency stop actuator shall  cause stopping of the calender rolls in accordance with 5.1.1.3.1,  allow the roll separation in accordance with 5.1.1.3.2,  allow the rescue reverse movement in accordance with 5.1.1.3.3,  trigger a visual and/or auditory signal, with manual resetting. One of the following types of devices for emergency stop shall be used:  a push-button operated switch;  a pull-cord operated switch;  a foot or knee operated switch. See also 10.7 of EN 60204-1:1997. 5.1.1.7 Start-up in forward motion or reverse motion (if existing) The calender shall be provided with a mode selector in accordance with !4.11.10 of EN ISO 12100-2:2003" which shall include the control positions for at least the following actions:  stopping;  forward motion at slow speed;  forward motion at production speed;  reverse motion (if existing). Start-up shall only be possible after an auditory warning signal in accordance with EN 457:1992 and EN 61310- 1:1995 has been sounded. The signal shall continue until the rolls start to rotate and have a minimum duration of 5 seconds. If it is necessary to remove or override certain guards or safety devices for start-up, safety of the operator shall be achieved by provision of control modes in accordance with !4.11.9 of EN ISO 12100-2:2003". See also 7.1.2f. 5.1.1.8 Reverse operation (if existing) Selection of reverse motion on the mode selector shall initiate a flashing luminous signal close to the new trapping zones generated by reverse movement. The signal shall continue as long as the selector switch is in that mode. SIST EN 12301:2000+A1:2008

Figure 9 — Example of a guard specifically designed for cleaning in the danger zone of the rolls 2) a trip bar as specified in 5.1.1.4.1 but only in the case where a single sheet of material is fed into the nip and the first point of contact between the sheet and the roll surface is outside the danger zone specified in 3.13. In this case the trip bar shall be positioned in accordance with figure 10.
1 Danger zone 2 Clearing zone 3 Guard positioned in accordance with EN 294 and 5.1.1.1 of this standard SIST EN 12301:2000+A1:2008

Dimensions in millimetres
Figure 10 — Positioning of the trip bar described in 5.1.1.9.b.2) c) If other trapping zones are accessible from the cleaning workstations they shall be safeguarded as specified in 5.1.1.1 or 5.1.1.2. d) The manufacturer shall provide safe means of access for cleaning operations. NOTE Guidance may be found in prEN 280 or EN 1570 (see bibliography) for mobile means of access, or in prEN 12437 for permanent means or access for instance. e) Ergonomic principles shall be applied as far as possible (see EN 614-1:1995). f) Comprehensive information on safe cleaning procedures shall be given in the instruction handbook (see 7.1.2g). SIST EN 12301:2000+A1:2008
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