1、October 2015 English price group 10No part of this translation 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 83.080.01!%FmX“2357453www.din.de
2、DIN EN ISO 21509Plastics and ebonite Verification of Shore durometers (ISO 21509:2006);English version EN ISO 21509:2015,English translation of DIN EN ISO 21509:2015-10Kunststoffe und Hartgummi Prfung der Shore-Hrtemessgerte (ISO 21509:2006);Englische Fassung EN ISO 21509:2015,Englische bersetzung v
3、on DIN EN ISO 21509:2015-10Plastiques et bonite Vrification des duromtres Shore (ISO 21509:2006);Version anglaise EN ISO 21509:2015,Traduction anglaise de DIN EN ISO 21509:2015-10www.beuth.deDTranslation by DIN-Sprachendienst.In case of doubt, the German-language original shall be considered authori
4、tative.Document comprises 15 pages09.15 DIN EN ISO 21509:2015-10 2A comma is used as the decimal marker. National foreword The text of ISO 21509:2006 has been prepared by Technical Committee ISO/TC 61 “Plastics” and has been taken over as EN ISO 21509:2015 by Technical Committee CEN/TC 249 “Plastics
5、” (Secretariat: NBN, Belgium). The responsible German body involved in its preparation was the DIN-Normenausschuss Kunststoffe (DIN Standards Committee Plastics), Working Committee NA 054-01-02 AA Mechanische Eigenschaften und Probekrperherstellung. The International Standards referred to in this do
6、cument have been published as DIN EN ISO Standards with the same number. EN ISO 21509 ICS 83.080.01 English Version Plastics and ebonite - Verification of Shore durometers(ISO 21509:2006) Plastiques et bonite - Vrification des duromtres Shore (ISO 21509:2006) Kunststoffe und Hartgummi -Prfung derSho
7、re- 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 Europeanstandards may be obtained on application to the CEN-CENELEC Management Centr
8、e or to any CEN member. This European Standard exists in three official versions (English, French, German). A version in any other language made by translationunder the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management Centre has the same status as the o
9、fficial 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, Netherland
10、s, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom. 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. No. EN
11、ISO 21509:2015 EEUROPEAN COMMITTEE FOR STANDARDIZATIONCOMIT EUROPEN DE NORMALISATIONEUROPISCHES KOMITEE FR NORMUNGEUROPEAN STANDARDNORME EUROPENNEEUROPISCHE NORM July 2015Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning suc
12、h nationalContents Page Foreword .3 1 Scope .4 2 Normative references4 3 Terms and definitions .4 4 Measuring instruments and temperature of verification 15 Verification of the durometer 4 6 Frequency of verification .9 7 Verification report 10 Annex A (informative) Example of tables to be included
13、in the verification report 11 DIN EN ISO 21509:2015-10 EN ISO 21509:2015 (E) 2DIN EN ISO 21509:2015-10EN ISO 21509:2015 (E)3European 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 b
14、een taken over as EN ISO 21509:2015 by Technical Committee CEN/TC 249 “Plastics” the secretariat of 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 conflict
15、ing national standards shall be withdrawn at the latest by January 2016. 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. According to
16、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,
17、 Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, 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
18、any modification. 1 Scope This International 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 referen
19、ces, only the edition cited applies. For 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 du
20、rometer (Shore hardness) 3 Terms and definitions 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 apparatu
21、s allowing the determination of hardness 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 shou
22、ld be 1/5 of the tolerance on the value 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
23、; DIN EN ISO 21509:2015-10 EN ISO 21509:2015 (E) 4 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 protru
24、sion of the indenter beyond the base of the presser 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 ind
25、icated in Figure 1 (for a type A Shore durometer) 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 mea
26、surement 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 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 dur
27、ometer DIN EN ISO 21509:2015-10EN ISO 21509:2015 (E)5Dimensions 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, asc
28、ertain that the diameter of the hole of the presser foot 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 tabl
29、es as shown in Table A.1 for the type A durometer and Table 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
30、 points 0 and 100 on the indicating device scale. Point 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
31、 or any other object which will not affect the integrity of the tip. DIN EN ISO 21509:2015-10 EN ISO 21509:2015 (E) 6NOTE 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, there
32、fore, it is recommended that a durometer support be used and that 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 in
33、dicator coincides with the measurement pointer at all points on 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 inde
34、nter 5.5.1 Method 1: Use of a dynamometric verification device 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 betw
35、een the presser foot and the dynamometric verification device. 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,
36、 the pointer shall coincide with the mark on the selected dial. 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
37、 Table A.4 or A.5. None of the readings shall be outside the indicated 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 dur
38、ometer; F = 445HD for a type D Shore durometer; where F is the 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
39、spacer can be a small cylindrical stem of height approximately 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
40、the type A Shore durometer and to within 50 mN (0,11 Shore D) for 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. NO
41、TE 2 The requirements concerning the verification equipment are 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
42、a Shore durometer based on the principle of a balance. DIN EN ISO 21509:2015-10EN ISO 21509:2015 (E)7If 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 duromet
43、er 5.5.2 Method 2: Use of a specifically designed verification device 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 a
44、rm and applied to the indenter. The verification device scale shall indicate 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 necessa
45、ry. 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. Calculate separately the maximum and mini
46、mum 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. DIN EN ISO 21509:2015-10 EN ISO 21509:2015 (E)
47、 8Figure 4 Shore durometer verification device The verification device shall be checked in such a way that, if a given Shore value is chosen by positioning the counterweight, the force applied to the indenter is within given tolerance limits ( 10 mN for the Shore A scale and 50 mN for the Shore D sc
48、ale). The verification device shall be checked: after its production; after each repair; in case of any kind of damage or doubt; at two-year intervals. 6 Frequency of verification Verification in accordance with this International Standard shall be carried out and the durometer certified: after the
49、production of a new durometer; after each repair; in case of any kind of damage, especially to the indenter; at yearly intervals. DIN EN ISO 21509:2015-10EN ISO 21509:2015 (E)97 Verification report At the end of each verification, a report including the following information shall be made out: a) the name and address of the body responsible for the verification; b) the name of the person who carried out the verification; c) the name
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