SIST EN 454:2015
(Main)Food processing machinery - Planetary mixers - Safety and hygiene requirements
Food processing machinery - Planetary mixers - Safety and hygiene requirements
This standard specifies safety and hygiene requirements for the design and manufacture of fixed bowl planetary mixers with a tool having a planetary movement. The capacity of the bowl is greater than or equal to 5 l and less than or equal to 200 l.
These machines are used to process various ingredients e.g. cocoa, flour, sugar, oils and fat, minced meat, eggs, and other ingredients, in the catering, bakery, pizza, pastry and confectionary industry.
These machines are sometimes used in other industries (e.g. pharmaceutical industry, chemical industry, printing, etc.), but hazards related to these uses are not dealt with in this standard.
Processing is carried out in cycles of variable duration. It can be either manually or automatically-controlled, in individual cycles or on a cycle repeat basis, etc. Manual operations are sometimes necessary to add ingredients without stopping the beater.
On machines fitted with a bowl lifting and lowering device or with a device for moving the bowl/head/beater vertically the working position is that when the beater is nearest to the bottom of the bowl.
This European Standard deals with all significant hazards, hazardous situations and events relevant to planetary mixers, when they are used as intended and under the conditions of misuse which are reasonably foreseeable by the manufacturer. It deals with the hazards due to the use, the maintenance and the cleaning.
This European standard does not deal with the following machines:
- catering attachment for planetary mixers (see EN 12851);
- continuously fed machines;
- dough mixers (see EN 453);
- experimental and testing machines under development by the manufacturers;
- domestic appliances.
This document is not applicable to machines which are manufactured before its date of publication as a European standard.
Nahrungsmittelmaschinen - Planetenrühr- und -knetmaschinen - Sicherheits- und Hygieneanforderungen
1.1 Diese Europäische Norm legt die Sicherheits und Hygieneanforderungen für die Konstruktion und Herstellung von Planetenrühr und knetmaschinen mit feststehendem Bottich mit einem Werkzeug, dass durch Verwendung von zwei parallelen Achsen eine umlaufende Bewegung hat. Die Kapazität des Bottichs beträgt dabei mindestens 5 L ) und höchstens 200 L.
Diese Planetenrühr- und -knetmaschinen werden einzeln oder im Verbund in der Nahrungsmittelindustrie und in Handwerksbetrieben (Großküchen, Bäckereien, Pizzerien, Konditoreien und Konfiserien) zum Rühren, Kneten und Emulgieren/Aufschlagen von Nahrungsmitteln verwendet (z. B. Kakao, Mehl, Zucker, Öle und Fette, Eier und andere Zutaten). Diese Maschinen werden von Hand und manchmal während des Arbeitsvorgangs ohne Stoppen der Maschine beschickt.
Der Betriebsvorgang wird in Zyklen von unterschiedlicher Länge ausgeführt. Er kann entweder handgesteuert oder automatisiert sein, in unterschiedlichen Zyklen oder auf der Grundlage eines Wiederholzyklus usw.
Diese Europäische Norm behandelt alle signifikanten Gefährdungen, Gefährdungssituationen und Gefähr-dungsereignisse, die im Zusammenhang mit Transport, Installation, Einstellarbeiten, Betrieb, Reinigung, Wartung, Zerlegung, Außerbetriebnahme und Abwracken von Planetenrühr- und -knetmaschinen auftreten können, wenn sie bestimmungsgemäß und unter Bedingungen von durch den Hersteller vernünftigerweise vorhersehbaren Fehlanwendungen verwendet werden (siehe Abschnitt 4).
1.2 Diese Europäische Norm behandelt keine der folgenden Maschinen:
- Großküchenvorsatzgeräte für Planetenrühr- und -knetmaschinen (siehe EN 12851);
- kontinuierlich beschickte Maschinen;
- Teigknetmaschinen (siehe EN 453);
- Anschlag-Rührmaschinen ohne parallele Achsen;
- Mischmaschinen;
- Versuchs- und Prüfmaschinen, die in der Entwicklung beim Hersteller sind;
- Maschinen, die in anderen Industriebereichen verwendet werden, z. B. der FIeischwarenindustrie, der Süßwarenindustrie, der pharmazeutischen Industrie, der chemischen Industrie;
- Haushaltsgeräte.
1.3 Diese Europäische Norm gilt nicht für Maschinen, die vor dem Datum seiner Veröffentlichung als Europäische Norm hergestellt wurden.
Machines pour les produits - Batteurs-mélangeurs - Prescriptions relatives à la sécurité et l'hygiène
La présente norme spécifie les prescriptions de sécurité et d'hygiène relatives à la conception et à la fabrication des batteurs-mélangeurs à cuve fixe dont l’outil effectue un mouvement rotatif. La capacité de la cuve est supérieure ou égale à 5 l ) et inférieure ou égale à 200 l.
Ces machines sont utilisées dans les grandes cuisines, la boulangerie, les pizzerias, la fabrication des pattes et les commerces de l'alimentation pour travailler différents ingrédients comme le cacao, la farine, le sucre, les huiles et matières grasses, la viande hachée, les oeufs, et autres ingrédients.
Ces machines sont parfois utilisées dans d'autres industries (industrie pharmaceutique, industrie chimique, imprimerie..), mais les phénomènes dangereux relatifs à ces utilisations ne sont pas pris en compte dans la présente norme.
Le travail s'effectue par cycles de durée variable.
Il peut être manuel ou automatique, par cycles ou répétition de cycles, etc.
Des interventions manuelles sont parfois nécessaires pour rajouter des ingrédients sans arrêter l'outil.
Sur les machines équipées d'un dispositif de monte et baisse de la cuve ou de l'ensemble cuve/tête/outil, la position de travail correspond à la position où l'outil se trouve le plus près du fond de la cuve.
La présente Norme européenne spécifie tous les phénomènes dangereux, situations et événements dangereux significatifs des batteurs-mélangeurs lorsqu’ils sont utilisés normalement et dans des conditions de mauvaise utilisation raisonnablement prévisibles par le fabricant. Elle traite des phénomènes dangereux engendrés par l’utilisation, la maintenance et le nettoyage (voir Article 4).
1.2 La présente Norme européenne ne traite pas des machines suivantes :
- les batteurs-mélangeurs utilisés comme accessoires (voir EN 12851) ;
- les machines travaillant en alimentation continue ;
- les pétrins (voir EN 453) ;
- les machines expérimentales ou d'essais en cours de mise au point par le constructeur ;
- les appareils à usage domestique.
1.3 Le présent document ne s’applique pas aux machines qui ont été fabriquées après la date de publication de la présente norme.
Stroji za predelavo hrane - Planetarni mešalniki - Varnostne in higienske zahteve
Ta standard določa varnostne in higienske zahteve za načrtovanje in izdelavo planetarnih mešalnikov z nepremičnimi posodami z orodjem s planetarnim gibanjem. Prostornina posode je večja ali enaka 5 l in manjša ali enaka 200 l.
Ti stroji se uporabljajo za predelavo različnih sestavin, npr. kakava, moke, sladkorja, olj in maščob, mletega mesa, jajc in drugih sestavin pri kateringu, v pekarnah, picerijah, pri izdelavi testa in v industriji slaščic.
Ti stroji se včasih uporabljajo v drugih industrijah (npr. v farmaciji, kemijski industriji, tiskarstvu itd.), vendar nevarnosti, povezane s temi uporabami, niso obravnavane v tem standardu.
Obdelava se izvaja v različno dolgih ciklih. Nadzorovana je lahko ročno ali avtomatsko, v posameznih ciklih ali s ponavljajočimi cikli itd. Včasih je potrebno ročno dodajanje sestavin brez ustavljanja stepalnika.
Pri strojih, ki so opremljeni napravo za dviganje in spuščanje posode ali napravo za premikanje posode/glave/stepalnika navpično v delovnem položaju, je to takrat, ko je stepalnik najbližje dnu posode.
Ta evropski standard opisuje vsa večja tveganja, nevarne situacije in nevarne dogodke v zvezi s planetarnimi mešalniki, kadar se uporabljajo v skladu z njihovim namenom in pod pogoji pričakovane nepravilne uporabe, ki jih določa proizvajalec. Obravnava nevarnosti zaradi uporabe, vzdrževanja in čiščenja.
Ta evropski standard ne obravnava naslednjih strojev:
– nastavkov za katering za planetarne mešalnike (glej EN 12851);
– strojev z nenehnim podajanjem;
– mešalnikov testa (glej EN 453);
– poskusnih in preskusnih strojev, ki jih razvijajo proizvajalci;
– gospodinjskih aparatov.
Ta dokument se ne uporablja za stroje, ki so bili izdelani pred datumom objave dokumenta kot evropskega standarda.
General Information
Relations
Standards Content (Sample)
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Stroji za predelavo hrane - Planetarni mešalniki - Varnostne in higienske zahteveNahrungsmittelmaschinen - Planetenrühr- und -knetmaschinen - Sicherheits- und HygieneanforderungenMachines pour les produits - Batteurs-mélangeurs - Prescriptions relatives à la sécurité et l'hygièneFood processing machinery - Planetary mixers - Safety and hygiene requirements67.260Tovarne in oprema za živilsko industrijoPlants and equipment for the food industryICS:Ta slovenski standard je istoveten z:EN 454:2014SIST EN 454:2015en,fr,de01-februar-2015SIST EN 454:2015SLOVENSKI
STANDARDSIST EN 454:2001+A1:20101DGRPHãþD
SIST EN 454:2015
EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 454
November 2014 ICS 67.260 Supersedes EN 454:2000+A1:2009English Version
Food processing machinery - Planetary mixers - Safety and hygiene requirements
Machines pour les produits - Batteurs-mélangeurs - Prescriptions relatives à la sécurité et l'hygiène
Nahrungsmittelmaschinen - Planetenrühr- und -knetmaschinen - Sicherheits- und Hygieneanforderungen This European Standard was approved by CEN on 6 September 2014.
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-CENELEC 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-CENELEC Management Centre has the same status as the official versions.
CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre:
Avenue Marnix 17,
B-1000 Brussels © 2014 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 454:2014 ESIST EN 454:2015
EN 454:2014 (E) 2 Contents Page Foreword .4 Introduction .5 1 Scope .6 2 Normative references .6 3 Terms, definitions, description and classification .7 3.1 Terms and definitions .7 3.2 Description .8 3.3 Classification .9 4 List of significant hazards .9 5 Safety and hygiene requirements and/or protective measures . 11 5.1 General . 11 5.2 Mechanical hazards . 11 5.2.1 General . 11 5.2.2 Zone 1 – Volume covered by the movement of the tool . 12 5.2.3 Zone 2 – Auxiliary drive hub (mechanical) . 16 5.2.4 Zone 3 – Space between bowl lifting system and frame . 16 5.2.5 Loss of stability . 17 5.3 Electrical hazards . 17 5.3.1 General . 17 5.3.2 Safety requirements related to electromagnetic phenomena . 17 5.3.3 Protection against electric shock . 17 5.3.4 Power circuits . 17 5.3.5 Protection against earth faults in control circuits . 17 5.4 Motor enclosures . 17 5.5 Emergency stop . 18 5.6 Thermal hazards . 18 5.7 Gas accumulation hazard . 18 5.8 Noise reduction . 18 5.9 Flour dust hazard . 18 5.10 Hygiene requirements . 18 5.11 Hazards generated by neglecting ergonomic principles . 19 6 Verification of safety and hygiene requirements and/or measures . 20 7 Information for use . 21 7.1 General . 21 7.2 Instruction handbook . 21 7.3 Marking . 23 Annex A (normative)
Noise test code for planetary mixers – Grade 2 of accuracy . 24 A.1 Installation and mounting conditions . 24 A.2 Operating conditions . 24 A.3 Measurements . 24 A.4 Emission sound pressure level determination . 24 A.5 Sound power level determination . 25 SIST EN 454:2015
EN 454:2014 (E) 3 A.6 Measurement uncertainties . 25 A.7 Information to be recorded . 25 A.8 Information to be reported. 26 A.9 Declaration and verification of noise emission values . 26 Annex B (informative)
Method of measuring dust . 27 B.1 Purpose of the test . 27 B.2 Principle of the tests . 27 B.3 Operating conditions . 27 Annex C (normative)
Principles of design to ensure the cleanability of planetary mixers . 28 C.1 Terms and definitions . 28 C.2 Materials of construction . 28 C.3 Design . 29 Annex ZA (informative)
Relationship between this European Standard and the
Essential Requirements of EU Directive 2006/42/EC . 48 Bibliography . 49
SIST EN 454:2015
EN 454:2014 (E) 4 Foreword This document (EN 454:2014) has been prepared by Technical Committee CEN/TC 153 “Machinery intended for use with foodstuffs and feed”, 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 May 2015 and conflicting national standards shall be withdrawn at the latest by May 2015. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN [and/or CENELEC] shall not be held responsible for identifying any or all such patent rights. This document supersedes EN 454:2000+A1:2009. 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 2006/42/EC. For relationship with EU Directive 2006/42/EC, see informative Annex ZA, which is an integral part of this document. Significant changes: The significant changes with respect to the previous edition EN 454:2000+A1:2009 are listed below: — modification of the numbers of classes of machines (2 instead of 3); — solid guard to protect against dust emission was added; — safety dimensions for the guard was précised; — control of the position of the bowl in working position for the Class 1; — table of verification of safety and hygiene requirements was completely revised. 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, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. SIST EN 454:2015
EN 454:2014 (E) 5 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 events are covered are indicated in the scope of this European Standard. 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. SIST EN 454:2015
EN 454:2014 (E) 6 1 Scope 1.1 This European Standard specifies safety and hygiene requirements for the design and manufacture of fixed bowl planetary mixers with a tool having a planetary movement by using two parallel axes. The capacity of the bowl is greater than or equal to 5 L1) and less than or equal to 200 L. These planetary mixers are used separately in the food industry and shops (catering, bakery, pizza, pastry and confectionary industry) for mixing, kneading and emulsifying/whipping food products (e.g. cocoa, flour, sugar, oils and fat, eggs, and other ingredients). These machines are fed by hand and sometimes during operation without stopping the machine. Processing is carried out in cycles of variable duration. It can be either manually or automatically controlled, in individual cycles or on a cycle repeat basis, etc. This European Standard deals with all significant hazards, hazardous situations and events relevant to the transport, installation, adjustment, operation, cleaning, maintenance, dismantling, disassembling and scrapping of planetary mixers, when they are used as intended and under the conditions of misuse which are reasonably foreseeable by the manufacturer(see Clause 4). 1.2 This European Standard does not deal with the following machines: — catering attachment for planetary mixers (see EN 12851); — continuously fed machines; — dough mixers (see EN 453); — whipping mixers which contain no parallel axes; — stirring machines; — experimental and testing machines under development by the manufacturers; — machines used in other industry, for example: meat industry, candy industry, pharmaceutical industry, chemical industry; — domestic appliances. 1.3 This European Standard is not applicable to machines which are manufactured before its date of publication as a European standard. 2 Normative references The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. EN 614-1:2006+A1:2009, Safety of machinery — Ergonomic design principles — Part 1: Terminology and general principles
1) Below 5 L, EN 60335-1 and the EN 60335-2 series are applicable. SIST EN 454:2015
EN 454:2014 (E) 7 EN 1672-2:2005+A1:2009, Food processing machinery — Basic concepts — Part 2: Hygiene requirements EN 12851, Food processing machinery — Catering attachments for machines having an auxiliary drive hub — Safety and hygiene requirements EN 60204-1:2006, Safety of machinery — Electrical equipment of machines — Part 1: General requirements (IEC 60204:2005, modified) EN 60529, Degrees of protection provided by enclosures (IP Code) EN 61000-6-1, Electromagnetic compatibility (EMC) — Part 6-1: Generic standards — Immunity for residential, commercial and light-industrial environments EN ISO 3743-1, Acoustics — Determination of sound power levels and sound energy levels of noise sources using sound pressure — Engineering methods for small movable sources in reverberant fields — Part 1: Comparison method for a hard-walled test room (ISO 3743-1) EN ISO 3744:2010, Acoustics — Determination of sound power levels and sound energy levels of noise sources using sound pressure — Engineering methods for an essentially free field over a reflecting plane (ISO 3744:2010) EN ISO 4287, Geometrical product specifications (GPS) — Surface texture: Profile method — Terms, definitions and surface texture parameters (ISO 4287) EN ISO 4871, Acoustics — Declaration and verification of noise emission values of machinery and equipment (ISO 4871) EN ISO 11201:2010, Acoustics — Noise emitted by machinery and equipment — Determination of emission sound pressure levels at a work station and at other specified positions in an essentially free field over a reflecting plane with negligible environmental corrections (ISO 11201:2010) EN ISO 12100:2010, Safety of machinery — General principles for design — Risk assessment and risk reduction (ISO 12100:2010) EN ISO 13732-1, Ergonomics of the thermal environment - Methods for the assessment of human responses to contact with surfaces - Part 1: Hot surfaces (ISO 13732-1) EN ISO 13849-1, Safety of machinery - Safety-related parts of control systems - Part 1: General principles for design (ISO 13849-1) EN ISO 14119:2013, Safety of machinery - Interlocking devices associated with guards - Principles for design and selection (ISO 14119:2013) 3 Terms, definitions, description and classification 3.1 Terms and definitions For the purposes of this document, the terms and definitions given in EN ISO 12100:2010 and the following apply. 3.1.1 tool mobile and removable equipment having a planetary movement which is used for mixing, kneading and emulsifying Note 1 to entry: The tool can have different shapes. SIST EN 454:2015
EN 454:2014 (E) 8 Note 2 to entry: The scraper is considered as a tool in this document. 3.1.2 planetary movement rotation of a tool both on itself and around the inside of a bowl by using two parallel axes 3.1.3 working position stable position both for the bowl and the tool and in which the bowl is locked in the upper position and the tool, locked on its shaft, is nearest to the bottom of the inside of the bowl 3.2 Description A planetary mixer (see Figure 1) usually consists of a frame supporting: — a casing (1), containing the tool(s) drive mechanism; — control devices (2); — a bowl (3) equipped with a grid or a solid cover, in which ingredients are processed; — interchangeable tool (4) designed to process ingredients; their rotation speed may be either constant or variable; — an optional auxiliary drive hub (5) for catering attachments (see EN 12851); — a device (6) for vertically moving the bowl or the head of the mixer to allow tool removal, or tilting of the head to remove the tool; — a device (7) for handling the bowl (optional), for example a trolley; — an interlocked guard (8); — bowl heating device (optional, not included in Figure 1); — bowl cooling device (optional, not included in Figure 1); — bowl gravity discharge (optional, not included in Figure 1). SIST EN 454:2015
EN 454:2014 (E) 9
Key 1 casing 2 control devices 3 bowl 4 tool 5 auxiliary drive hub 6 handle 7 trolley 8 interlocked guard (solid cover) Figure 1 — Main parts of a planetary mixer 3.3 Classification Planetary mixers are classified into the following two categories according to their bowl volume: — class 1: bowls having a volume equal to or greater than 5 L and less than 10 L; — class 2: bowls having a volume equal to or greater than 10 L and less than or equal to 200 L, where the bowl volume is the maximum volume of water in litres that the bowl can contain. When a mixer is supplied with several bowls of different capacities, the mixer classification is determined by the size of the bowl with the greatest volume. 4 List of significant hazards This clause contains all the significant hazards, hazardous situations and events, identified by risk assessment as significant for this type of machinery and which require measures to eliminate or reduce the risk associated with the identified hazards (see Table 1). SIST EN 454:2015
EN 454:2014 (E) 10 Figure 2 shows the danger zones. Table 1 Hazards, hazardous situations and hazardous events Location or cause Clause/subclause in this European Standard Mechanical hazards (see Figure 2) 5.2 — trapping hazard zone 1: volume covered by the moving tool zone 3: space between bowl lifting system and frame — trapping and shearing zone 2: auxiliary drive hub (mechanical) Electrical hazards Electric shock from direct or indirect contact with live components Electromagnetic disturbance 5.3 5.3 IP degree Motor enclosure 5.4 Stopping of the machine No access to the normal OFF of the machine 5.5 Thermal hazards Device to maintain food at a constant temperature 5.6 Gas accumulation hazard Gas burner 5.7 Hazards generated by noise Hearing damage, accidents due to interference with speech communication and interference with the perception of acoustic signals 5.8 Hazards generated by materials and substances inhalation of flour dust 5.9 Hazards generated by neglecting hygienic design principles e.g. contamination by microbial growth or foreign materials 5.10 Hazards generated by neglecting ergonomic principles During operation, cleaning and maintenance 5.11
SIST EN 454:2015
EN 454:2014 (E) 11
Key zone 1: volume covered by the moving tool zone 2: auxiliary drive hub for attachments zone 3: space between bowl lifting system and frame Figure 2 — Danger zones of a planetary mixer (with guard removed) 5 Safety and hygiene 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 for relevant but not significant hazards, which are not dealt with by this document. Unless otherwise specified, the requirements given throughout Clause 5 apply both to Class 1 and Class 2. 5.2 Mechanical hazards 5.2.1 General Where reference is made to interlocking devices throughout Clause 5, they shall comply with EN ISO 14119. The safety related parts of the control system shall present at least a performance level “c” defined in accordance with EN ISO 13849-1. SIST EN 454:2015
EN 454:2014 (E) 12 When fixed guards or parts of the machine acting as such are not permanently fixed, e.g. by welding, their fixing systems shall remain attached to the guards or to the machinery when the guards are removed. 5.2.2 Zone 1 – Volume covered by the movement of the tool 5.2.2.1 Solid interlocked guard Access from above shall be prevented while the tool is moving. This may be achieved by a movable interlocking guard covering the top of the bowl. The bowl itself when in working position prevents access from other directions. For Class 1 planetary mixers, because of their low power and small size, access to the volume covered by the tool shall be at least restricted by a bowl extension. It may be fixed or associated with an interlocking device and movable so that the tool will not operate unless the bowl extension is in position, see Figure 3. There shall be a minimum distance of 120 mm between the upper edge of the extension and the upper limit of the volume covered by the tool. The distance between the upper edge of bowl and the lower edge of the bowl extension may not exceed 8 mm. In working position the distance between the upper edge of the bowl extension and the machine frame shall be less than or equal to 80 mm. Dimensions in millimetres
Figure 3 — Class 1 planetary mixers with bowl extension For class 2 planetary mixers, preventing access to the tool may be achieved by a movable interlocking guard covering the top of the bowl. In working position the distance between the upper edge of the interlocked guard and the machine frame shall be less than or equal to 80 mm. If the interlocked guard is solid (e.g. a cover without apertures), it can also be used to prevent flour dust emission hazard (see 5.9), and the following requirements apply. The interlocked guard shall be linked to suitable actuated position detectors functioning in the positive mode in compliance with EN ISO 14119:2013, 5.4. Position detectors themselves shall comply with EN ISO 14119:2013, 5.2 and 5.3.1, and any rotary or linear cams with EN ISO 14119:2013, 5.3.2. SIST EN 454:2015
EN 454:2014 (E) 13 The safety dimensions shall be in accordance with Table 2 and Figure 4. Table 2 Safety dimensions (see Figure 4) a b c d mm 8 15 25 25
The opening space between the bowl and the movable guard (see Figure 4a) and Figure 4b)) shall be less than or equal to 8 mm in the working position. The distance between the rear edge of the protective device and the nearest point of the machine (see Figure 4a) and Figure 4b)) shall be less than or equal to 15 mm in the working position. The opening space between the upper edge of the bowl and lower edge of the interlocked guard shall be less than or equal to 25 mm when the interlocking device is actuated (see Figure 4c) and Figure 4d)). The opening space between the edge of the interlocked guard and the frame of the machine shall be less than or equal to 25 mm when the interlocking device is actuated (see Figure 4). SIST EN 454:2015
EN 454:2014 (E) 14
a) Interlocked guard with circular movement in working position b) Interlocked guard with tilting movement in working position
c) Interlocked guard with circular movement in actuated position d) Interlocked guard with tilting movement in actuated position Figure 4 — Safety dimensions with different types of guards As it is necessary to gain access to the bowl, for example to add ingredients when the machine is in operation, guard dimensions opening shall comply with the values given in Table 3 and Figure 5 with the opening oriented vertically or horizontally. The opening can be enlarged by combining several openings which are separated by bars where the dimensions of each opening comply with the values of Table 3. SIST EN 454:2015
EN 454:2014 (E) 15
Key x distance between the lower edge of the opening and the upper edge of the tool l width of the opening h height of the opening Figure 5 — Planetary mixer with a solid cover Table 3 Dimensions in millimetres x < 50 50 to 120 > 120 l ≤ 120 ≤ 120 ≤ 120 h ≤ 20 ≤ 30 ≤ 50
5.2.2.2 Mixers with several bowls Where a mixer is supplied with several bowls, the requirements of 5.2.2.1 or 5.2.2.2 shall be met for the largest bowl, as applicable. In the working position, the opening space Z shall be less than or equal to 15 mm for each bowl supplied with the mixer (see Figure 6). SIST EN 454:2015
EN 454:2014 (E) 16
Key 1 largest bowl 2 smallest bowl Z space opening between upper edge of the bowl and lower edge of the guard Figure 6 — Mixer with several bowls 5.2.2.3 Access to the tool The tool drive mechanism shall not be capable of operation when the bowl is not in place and in the working position e.g. by a switch actuated by a cam located inside the frame. 5.2.2.4 Stopping time Guard actuated stopping devices shall stop the tool without any ingredients present in the bowl in less than or equal to 4 s. If this not possible, opening of the guard shall be prevented until the tool has stopped moving. This can be achieved by providing an interlocking guard with guard locking (see EN ISO 12100:2010, 3.27.5). 5.2.3 Zone 2 – Auxiliary drive hub (mechanical) The drive shaft on which attachments are fitted shall not project from the machine frame and shall be fitted with a cover which cannot be removed from the machine, e.g. hinged, so as to enclose the connection point. 5.2.4 Zone 3 – Space between bowl lifting system and frame 5.2.4.1 The guide and drive mechanism operating the vertical movement of the bowl shall not create any risks of trapping or pinching. This may be achieved by use of a fixed guard. 5.2.4.2 When manually operated minimum distance between either the bowl or the frame and the lever for lifting and lowering the bowl shall be 50 mm in order to prevent injury when operating the lever. 5.2.4.3 If the bowl lifting and lowering mechanism is motorized, crushing between the ascending bowl, bowl lifting system and machine frame and any guard shall be prevented. This may be by either: — a pressure-sensitive edge or; — a hold-to-run control to operate the bowl movement. SIST EN 454:2015
EN 454:2014 (E) 17 5.2.4.4 For Class-2-machines, the bowl lifting and lowering mechanism shall be able to hold a vertical force equal to twice the weight of the bowl filled with water, when it is in its upper position. 5.2.5 Loss of stability 5.2.5.1 For machines to be fixed to the floor the instruction handbook shall indicate the values of forces at the fixing points. 5.2.5.2 Free standing machines without castors shall be stable when tilted 10° from the horizontal plane in the most unfavourable direction. 5.2.5.3 Free standing machines with castors shall have at least two castors (or sets of castors) fitted with a locking device and shall comply with the provisions of 5.2.5.2. 5.3 Electrical hazards 5.3.1 General Electrical equipment – for example switches – that may be exposed to water, e.g. during cleaning, shall be protected to an a
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