1、July 2009DEUTSCHE NORM English price group 10No part of this standard may be reproduced without prior permission ofDIN Deutsches Institut fr Normung e. V., Berlin. Beuth Verlag GmbH, 10772 Berlin, Germany,has the exclusive right of sale for German Standards (DIN-Normen).ICS 83.200!$Xlh“1537369www.di
2、n.deDDIN EN 1612-1Plastics and rubber machines Reaction moulding machines Amendment A1:2008)English version of DIN EN 1612-1:2009-07Kunststoff- und Gummimaschinen Reaktionsgiemaschinen Englische Fassung DIN EN 1612-1:2009-07SupersedesDIN EN 1612-1:1997-11See start of validitywww.beuth.dePart 1: Safe
3、ty requirements for metering and mixing units (includesTeil 1: Sicherheitsanforderungen an Misch- und Dosiereinheiten (enthlt nderungA1:2008)Document comprises 14 pagesDIN EN 1612-1:2009-07 2 Start of validity This standard takes effect on 1 July 2009. DIN EN 1612-1-1997-11 may be used in parallel u
4、ntil 28 December 2009. National foreword This standard includes safety requirements. This standard has been prepared by Technical Committee CEN/TC 145 “Industrial Plastics and rubber machines” (Secretariat: UNI, Italy). The responsible German body involved in its preparation was the Normenausschuss
5、Maschinenbau (Mechanical Engineering Standards Committee), Technical Committee NA 060-14-09 AA Reaktions-giemaschinen of Section Kunststoff- und Gummimaschinen. Amendment of the European Machinery Directive has made it necessary to review the previously valid standard, EN 1612-1:1997, in terms of th
6、e essential requirements of the new European Machinery Directive, 2006/42/EC. This standard contains specifications meeting the essential requirements set out in Annex I of the “Machinery Directive”, Directive 98/37/EC, (valid until 28 December 2009) and the “revised Machinery Directive”, Directive
7、2006/42/EC, which takes effect on 29 December 2009, and which apply to reaction moulding machines that are either first placed on the market or commissioned within the EEA. This standard serves to facilitate proof of compliance with the essential requirements of the directives. Once this standard is
8、 cited in the Official Journal of the European Union, it is deemed a “harmonized” standard and thus, a manufacturer applying this standard may assume compliance with the requirements of the Machinery Directive (“presumption of conformity”). The European Standards referred to in clause 2 of this docu
9、ment have been published as the corresponding DIN EN or DIN EN ISO Standards with the same number. Amendments This standard differs from DIN EN 1612-1:1997-11 as follows: a) Normative references have been updated. b) Annex ZA (informative) “Relationship between this European Standard and the Essenti
10、al Requirements of EU Directive 98/37/EC” has been included. c) Annex ZB (informative) “Relationship between this European Standard and the Essential Requirements of EU Directive 2006/42/EC” has been included. Previous editions DIN EN 1612-1: 1997-11 EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM
11、 EN 1612-1:1997+A1 August 2008 ICS 83.200 Supersedes EN 1612-1:1997 English Version Plastics and rubber machines - Reaction moulding machines - Part 1: Safety requirements for metering and mixing units Machines pour les matires plastiques et le caoutchouc - Machines de moulage par raction - Partie 1
12、: Prescriptions de scurit relatives aux units de dosage et de mlange Kunststoff- und Gummimaschinen - Reaktionsgiemaschinen - Teil 1: Sicherheitsanforderungen an Misch- und Dosiereinheiten This European Standard was approved by CEN on 11 July 1997 and includes Amendment 1 approved by CEN on 8 June 2
13、008. 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
14、 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
15、 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,
16、Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: rue de Stassart, 36 B-1050 Brussels 2008 CEN All rights of exploitation in any form an
17、d by any means reserved worldwide for CEN national Members. Ref. No. EN 1612-1:1997+A1:2008: EEN 1612-1:1997+A1:2008 (E) 2 Contents Page Foreword3 Introduction .4 1 Scope 4 2 Normative references 4 3 Definitions 5 4 List of hazards6 5 Safety requirements and/or measures 6 6 Verification of the safet
18、y requirements and/or measures .8 7 Information for use 9 Annex ZA (informative) !Relationship between this European Standard and the Essential Requirements of EU Directive 98/37/EC“.11 Annex ZB (informative) !Relationship between this European Standard and the Essential Requirements of EU Directive
19、 2006/42/EC“.12 DIN EN 1612-1:2009-07 EN 1612-1:1997+A1:2008 (E) 3 Foreword This document (EN 1612-1:1997+A1:2008) has been prepared by Technical Committee CEN/TC 145 “Plastics and rubber machines”, the secretariat of which is held by UNI. This European Standard shall be given the status of a nation
20、al standard, either by publication of an identical text or by endorsement, at the latest by February 2009, and conflicting national standards shall be withdrawn at the latest by December 2009. This document includes Amendment 1, approved by CEN on 2008-06-08. The main changes compared to the previou
21、s version are: Modification of the main element of the title Editorial modification of Annex ZA Addition of Annex ZB editorial changes of EN 292-1:1991 to EN ISO 12100-1 and of EN 292-2:1991 to EN ISO 12100-2:2003 in the following clauses: Introduction, 2, 7. This document supersedes EN 1612-1:1997.
22、 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). !Fo
23、r relationship with EU Directive(s), see informative Annexes ZA and ZB, which are integral parts of this document.“ According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulg
24、aria, 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. DIN EN 1612-1:2009-07 EN 1612-1
25、:1997+A1:2008 (E) 4 Introduction This European Standard is a type C Standard as defined in !EN ISO 12100“. The extent to which hazards are covered is indicated in the scope of this standard. In addition, machinery shall comply as appropriate with !EN ISO 12100“ for hazards which are not covered by t
26、his standard. 1 Scope This standard specifies the health and safety requirements for the design of metering and mixing units for reaction moulding machines. The significant and specific hazards are listed in clause 4 and are dealt with in this standard. This standard does not cover completely the ha
27、zards arising from the use of highly flammable additives, for example, pentane used as a blowing agent (see 4.7), because these hazards depend to a large extent on the additives and processes used. This standard does not cover the hazards arising from the assembly of separate units not supplied at t
28、he same time by the same manufacturer. This standard does not cover the hazards arising from the movement of powered mixing heads; for these, see !EN 1612-2“. This standard applies to metering and mixing units manufactured after the date of publication of this standard. 2 Normative references This s
29、tandard incorporates by dated or undated reference provisions from other publications. These normative references are cited at appropriate places in the text and the publications are listed hereafter. For dated references, subsequent amendments to or revisions of any of these publications apply to t
30、his European Standard only when incorporated in it by amendment or revision. For undated references the latest edition of the publication referred to applies. !deleted text“ EN 418:1992, Safety of machinery - Emergency stop equipment, functional aspects - Principles for design EN 563, Safety of mach
31、inery - Temperatures of touchable surfaces - Ergonomics data to establish limit values for hot surfaces EN 954-1, Safety of machinery - Safety related parts of control systems - Part 1: General principles for design !EN 1005“, Safety of machinery Human physical performance EN 60204-1:1992, Safety of
32、 machinery - Electrical equipment of machines - Part 1: General requirements !(IEC 60204-1:1992, modified)“ !EN ISO 12100-1, Safety of machinery - Basic concepts, general principles for design - Part 1: Basic terminology, methodology (ISO 12100-1:2003) DIN EN 1612-1:2009-07 EN 1612-1:1997+A1:2008 (E
33、) 5 EN ISO 12100-2:2003, Safety of machinery - Basic concepts, general principles for design - Part 2: Technical principles (ISO 12100-2:2003)“ 3 Definitions For the purposes of this standard, the following definitions apply (see figure 1): 3.1 working tank a tank which is part of the metering and m
34、ixing unit and contains one of the components 3.2 metering unit a unit for metering the components 3.3 mixing head the part of the metering and mixing unit for mixing and delivery which can be manually operated or powered (if powered, see !EN 1612-2“) 3.4 highly flammable additive an additive with a
35、 flash point 21C NOTE For the moment there is no European Directive or Standard in existence Key 1 working tank 2 metering unit 3 mixing head Figure 1 Example of a metering and mixing unit DIN EN 1612-1:2009-07 EN 1612-1:1997+A1:2008 (E) 6 4 List of hazards 4.1 Hazards due to moving couplings 4.2 Ha
36、zards due to instability 4.3 Hazards due to whiplash of hoses following rupture or disconnection 4.4 Hazards due to fluid ejection 4.5 Hazards due to overpressure 4.6 Hazards due to elevated temperatures of manually operated mixing heads which can cause either burns or unexpected reactions on the pa
37、rt of the operator 4.7 Hazards due to contact with the components, additives or a mixture of them or due to the inhalation of gases dangerous to health During manual filling of the working tanks; Due to leakage; During delivery of product through the mixing head. 4.8 Hazards due to incorrect connect
38、ion of hoses 4.9 Hazards due to explosion where highly flammable additives are used 4.10 Hazards due to neglect of ergonomic principles 4.11 Electrical hazards 4.12 Hazards due to failure of the control circuit 5 Safety requirements and/or measures 5.1 Hazards due to moving couplings The exposed cou
39、plings between pumps and motors shall be protected by fixed guards. 5.2 Hazards due to instability Where independent fixings are used to support the mixing head they shall be bolted to the floor. See also clause 7. 5.3 Hazards due to whiplash of hoses Whiplash of hoses shall be prevented, for exampl
40、e by: Binding the hoses together; DIN EN 1612-1:2009-07 EN 1612-1:1997+A1:2008 (E) 7 Attaching the hoses to a fixed part. This shall be done at least every 75 cm. In addition, flexible hoses and their connections shall be designed to prevent tearing from their fittings and unintentional detachment f
41、rom connection points. Flexible hoses shall not be used to support the mixing head. 5.4 Hazards due to fluid ejection Hose assemblies shall be marked at their connection points with the nominal pressure, month and year of manufacture and the name of the manufacturer. Because of the need to replace h
42、oses (see clause 7) a shot counter shall be provided for metering and mixing units which work at a pressure of more than 30 bar. Adjustment devices on the mixing head, for example screws or pins shall be designed in such a way that they are retained in the head so that unintentional complete removal
43、 of these devices and the resulting outflow of fluids is prevented. It shall not be possible for fluids to be released from the mixing head due to Failure of the energy supply and/or Unexpected restoration of the energy supply. This may be achieved for example By means of a valve which shall automat
44、ically close in case of any failure of the energy supply; By a requirement to restart the machine at the control panel after any failure of the energy supply. The safety related parts of the control system for the mixing head shall be of at least category 1 of EN 954-1. 5.5 Hazards due to overpressu
45、re The metering and mixing unit shall be designed so that the pressure cannot exceed the maximum pressure specified by the manufacturer. This shall be achieved either: By limitation of the drive system for pumps or By one or more mechanical devices for example a pressure relief valve or bursting dis
46、c. Opening of the device(s) shall not give rise to emissions to the environment. This may be achieved for example by the relief valve being vented into a vessel to contain any liquid released. 5.6 Hazards due to elevated temperatures of manually operated mixing heads Manually operated mixing heads w
47、here the temperature of the surface can exceed 50C shall be provided with handles. The temperature of the handles shall not exceed the limits set by EN 563. These handles shall be so designed that it is impossible for the operator to touch the mixing head whilst holding them. 5.7 Hazards due to cont
48、act or inhalation For manual filling of working tanks, see clause 7. DIN EN 1612-1:2009-07 EN 1612-1:1997+A1:2008 (E) 8 The metering and mixing unit shall be designed so that leakage can be detected visually. Devices shall be provided to contain fluids which may escape from dynamic seals. A local ex
49、haust ventilation system may be needed for the delivery area dependent on composition of the product (see clause 7). For contact due to splashing, see clause 7. 5.8 Hazards due to incorrect connection of hoses Hoses and their connection points shall be unambiguously and permanently marked. See also clause 7. 5.9 Hazards due to explosion where highly flammable additives are used Measures are required to prevent the build up of concentrations of highly flammable additives which could lead to an explosion. The methods to be adopted
