1、BRITISH STANDARDBS EN ISO 21509:2015Plastics and ebonite Verification of Shore durometers ICS 83.080.01g49g50g3g38g50g51g60g44g49g42g3g58g44g55g43g50g56g55g3g37g54g44g3g51g40g53g48g44g54g54g44g50g49g3g40g59g38g40g51g55g3g36g54g3g51g40g53g48g44g55g55g40g39g3g37g60g3g38g50g51g60g53g44g42g43g55g3g47g36
2、g58BS EN ISO 21509:2015This British Standard was published under the authority of the Standards Policy and Strategy Committee on 30 June 2006ISBN 0 580 88662 1National forewordThe UK participation in its preparation was entrusted to Technical Committee PRI/21, Testing of plastics.A list of organizat
3、ions represented on this committee can be obtained on request to its secretary.This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. Compliance with a British Standard confer immunity from legal obligations.This Br
4、itish Standard is the UK implementation of EN ISO 21509:2015. It is identical to ISO 21509:2006. It supersedes BS ISO 21509:2006, which is withdrawn.Amendments/corrigenda issued since publicationDate Comments 30 September This corrigendum renumbers BS ISO 21509:2006 as BS EN ISO 21509:2015 The Briti
5、sh Standards Institution 2015. Published by BSI Standards Limited 2015.2015EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 21509 July 2015 ICS 83.080.01 English Version Plastics and ebonite - Verification of Shore durometers (ISO 21509:2006) Plastiques et bonite - Vrification des duromtres
6、Shore (ISO 21509:2006) Kunststoffe und Hartgummi - Prfung der Shore-Hrtemessgerte (ISO 21509:2006) This European Standard was approved by CEN on 23 July 2015. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard th
7、e 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, Fren
8、ch, 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,
9、 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
10、and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels 2015 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref.
11、 No. EN ISO 21509:2015 EEuropean foreword The text of ISO 21509:2006 has been prepared by Technical Committee ISO/TC 61 “Plastics” of the International Organization for Standardization (ISO) and has been taken over as EN ISO 21509:2015 by Technical Committee CEN/TC 249 “Plastics” the secretariat of
12、which is held by NBN. 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 January 2016, and conflicting national standards shall be withdrawn at the latest by January 2016. Attention is drawn to the p
13、ossibility 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. According to the CEN-CENELEC Internal Regulations, the national standards organizations of the following countrie
14、s 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
15、, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. Endorsement notice The text of ISO 21509:2006 has been approved by CEN as EN ISO 21509:2015 without any modification. iiiBS EN ISO 21509:2015 EN ISO 21509:2015iiiContents Page Foreword iv 1 Scope . 1
16、2 Normative references . 1 3 Terms and definitions. 1 4 Measuring instruments and temperature of verification 1 5 Verification of the durometer. 1 6 Frequency of verification . 6 7 Verification report. 7 Annex A (informative) Example of tables to be included in the verification report. 8 BS EN ISO 2
17、1509:2015 EN ISO 21509:2015iv Foreword ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing International Standards is normally carried out through ISO technical committees. Each member body interes
18、ted in a subject for which a technical committee has been established has the right to be represented on that committee. International organizations, governmental and non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the International Electrotechnical C
19、ommission (IEC) on all matters of electrotechnical standardization. International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2. The main task of technical committees is to prepare International Standards. Draft International Standards adopted by the tech
20、nical committees are circulated to the member bodies for voting. Publication as an International Standard requires approval by at least 75 % of the member bodies casting a vote. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. ISO
21、shall not be held responsible for identifying any or all such patent rights. ISO 21509 was prepared by Technical Committee ISO/TC 61, Plastics, Subcommittee SC 2, Mechanical properties. BS EN ISO 21509:2015 EN ISO 21509:20151Plastics and ebonite Verification of Shore durometers 1 Scope This Internat
22、ional Standard concerns the verification of type A and D Shore durometers used to conduct hardness tests as described in ISO 868. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. Fo
23、r undated references, the latest edition of the referenced document (including any amendments) applies. ISO 291, Plastics Standard atmospheres for conditioning and testing ISO 868:2003, Plastics and ebonite Determination of indentation hardness by means of a durometer (Shore hardness) 3 Terms and de
24、finitions For the purposes of this document, the following terms and definitions apply. 3.1 verification all of the operations carried out in order to determine compliance of the device with the requirements of this International Standard 3.2 durometer apparatus allowing the determination of hardnes
25、s by forcing an indenter into a material 4 Measuring instruments and temperature of verification The verification methods described in this document require the use of both dimensional and dynamometric instruments. NOTE Usually, the measurement uncertainty should be 1/5 of the tolerance on the value
26、 to be verified. The verification shall be conducted at an ambient temperature of 21 C to 25 C or 25 C to 29 C for tropical countries if agreed on by all parties (see ISO 291). 5 Verification of the durometer 5.1 Elements to be verified geometry of the indenter; BS EN ISO 21509:2015 EN ISO 21509:201
27、52 maximum protrusion of the indenter beyond the base of the presser foot; geometry of the presser foot; scale of the indicating device; force exerted by the measurement spring on the indenter. 5.2 Verification of the geometry and of the maximum protrusion of the indenter beyond the base of the pres
28、ser foot Using a suitable optical or mechanical device (e.g. a profile projector, a binocular optical measurement instrument, callipers or similar device), verify that the dimensions of the indenter comply with the geometry specified in ISO 868 and indicated in Figure 1 (for a type A Shore durometer
29、) and in Figure 2 (for a type D Shore durometer); likewise, verify that the maximum protrusion of the indenter beyond the base of the presser foot lies within the tolerances given in Figure 1 or 2. Repeat the measurement three times and record each measurement for each durometer. It is recommended t
30、hat the measurements be recorded in tables as shown in Table A.1 for the type A durometer and Table A.2 for the type D durometer. Dimensions in millimetres Key 1 presser foot 2 indenter aFull protrusion: 2,5 mm 0,04 mm. Figure 1 Indenter for type A durometer BS EN ISO 21509:2015 EN ISO 21509:20153Di
31、mensions in millimetres Key 1 presser foot 2 indenter aFull protrusion: 2,5 mm 0,04 mm. Figure 2 Indenter for type D durometer 5.3 Verification of the geometry of the presser foot Using calipers, calibrated pins or a suitable optical device, ascertain that the diameter of the hole of the presser foo
32、t is between 2,5 mm and 3,5 mm and that this hole is centred at least 6 mm from the edges of the foot. Repeat the measurement three times and record each measurement for each durometer. It is recommended that the measurements be recorded in tables as shown in Table A.1 for the type A durometer and T
33、able A.2 for the type D durometer. NOTE Some manufacturers chamfer the edge of the presser foot hole. In such cases, the chamfer area is not taken into account by the measurement. 5.4 Verification of the scale of the indicating device Verify the points 0 and 100 on the indicating device scale. Point
34、 0 corresponds to the maximum protrusion of the indenter beyond the base of the presser foot (indenter at rest); point 100 corresponds to nil protrusion obtained by placing the presser foot and indenter in firm contact with a flat sheet of glass or any other object which will not affect the integrit
35、y of the tip. BS EN ISO 21509:2015 EN ISO 21509:20154 NOTE In view of the stiffness of the measurement spring and the geometry of the indenter of the type D Shore durometer, the tip of the cone is fragile. When verifying point 100, therefore, it is recommended that a durometer support be used and th
36、at the indenter be applied to the bearing surface perpendicularly so as not to break the tip or bend the indenter centring device. If the durometer has a maximum-reading indicator, it is necessary to ascertain that the maximum-reading indicator coincides with the measurement pointer at all points on
37、 the scale. Repeat the measurement three times and record each measurement. It is recommended that the measurements be recorded in a table as shown in Table A.3. 5.5 Verification of the force exerted by the measurement spring on the indenter 5.5.1 Method 1: Use of a dynamometric verification device
38、When using a dynamometric verification device, the measurement spring is verified by fixing the latter in a vertical position and, if necessary, resting the tip of the indenter on a small metal spacer in order to prevent any contact between the presser foot and the dynamometric verification device.
39、The method normally employed is as follows: forces corresponding to different durometer readings ranging from Shore hardness 20 to 90 in increments of approximately 10 are exerted on the indenter. In the case of a pointer-type durometer, the pointer shall coincide with the mark on the selected dial.
40、 Repeat the series of measurements three times with increasing load and record the results. Then carry out a series with decreasing load and record these results. It is recommended that the measurements be recorded in a table as shown in Table A.4 or A.5. None of the readings shall be outside the in
41、dicated tolerance limits. At each load increment, the force measured by the dynamometric device Fiis compared with the force F calculated using the appropriate stiffness equation for the spring, viz: F = 550 + 75HA for a type A Shore durometer; F = 445HD for a type D Shore durometer; where F is the
42、force applied, in mN; HA or HD is the hardness reading on the type A or D Shore durometer, respectively. Fishall be equal to F to within 75 mN for the type A Shore durometer or to within 445 mN for the type D Shore durometer. NOTE 1 The spacer can be a small cylindrical stem of height approximately
43、2,5 mm and diameter approximately 1,25 mm, slightly cupped on top in order to accommodate the indenter tip. Any dynamometric device may be employed provided that it is able to apply and measure a force to within 10 mN (0,13 Shore A) for the type A Shore durometer and to within 50 mN (0,11 Shore D) f
44、or the type D Shore durometer. For example, a balance having a capacity of 1 kg or 5 kg and a maximum permissible error of 1 g would be suitable for verifying the measurement spring of a type A or type D Shore durometer, respectively. NOTE 2 The requirements concerning the verification equipment are
45、 less stringent than those specified in ISO 868:2003, Clause 6. ISO 868:2003, Clause 6, will be modified to refer to this International Standard at the next revision of ISO 868. Figure 3 shows equipment for verification of the spring of a Shore durometer based on the principle of a balance. BS EN IS
46、O 21509:2015 EN ISO 21509:20155If the balance reads in grams, this reading shall be converted into newtons using the local value of the gravitational acceleration. Figure 3 Balance for verification of the spring of a Shore durometer 5.5.2 Method 2: Use of a specifically designed verification device
47、With instruments specifically designed for the verification of Shore durometers, such as control-recalibration devices (for an example, see Figure 4), the actual load Fiis given by the movement of the counterweight along a lever arm and applied to the indenter. The verification device scale shall in
48、dicate directly in Shore A and/or Shore D units and apply an actual load Fito the indentor corresponding to the stiffness equation for the measurement spring, so that no conversion from forces to Shore hardness readings is necessary. Repeat the series of measurements three times with increasing load
49、 and record the results. Then carry out a series with decreasing load and record these results. It is recommended that the measurements be recorded in a table as shown in Table A.4 or A.5. Calculate separately the maximum and minimum values at each load increment for the increasing loading. None of the readings shall be outside the indicated tolerance limits. In the event of problems, in particular if the durometer reading is not stable or not reproducible, repeat the procedure. BS EN ISO 21509:2015 EN ISO 21509:20156 Figure 4 Shore durome
