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1、BS ISO 7267-1:2008 ICS 83.140.99 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW BRITISH STANDARD Rubber-covered rollers Determination of apparent hardness Part 1: IRHD method Licensed CopyChinese University of Hong Kong, 13/06/2009 08:42, Uncontrolled Copy, (c) BSI This Briti
2、sh Standard was published under the authority of the Standards Policy and Strategy Committee on 30 April 2009 BSI 2009 ISBN 978 0 580 59775 6 Amendments/corrigenda issued since publication DateComments BS ISO 7267-1:2008 National foreword This British Standard is the UK implementation of ISO 7267-1:
3、2008. It supersedes BS 7442-3 1:1998 which is withdrawn. The UK participation in its preparation was entrusted to Technical Committee PRI/22, Physical testing of rubber. A list of organizations represented on this committee can be obtained on request to its secretary. This publication does not purpo
4、rt to include all the necessary provisions of a contract. Users are responsible for its correct application. Compliance with a British Standard cannot confer immunity from legal obligations. . Licensed CopyChinese University of Hong Kong, 13/06/2009 08:42, Uncontrolled Copy, (c) BSI BS ISO 7267-1:20
5、08 Reference number ISO 7267-1:2008(E) ISO 2008 INTERNATIONAL STANDARD ISO 7267-1 Third edition 2008-08-01 Rubber-covered rollers Determination of apparent hardness Part 1: IRHD method Cylindres revtus de caoutchouc Dtermination de la duret apparente Partie 1: Mthode DIDC Licensed CopyChinese Univer
6、sity of Hong Kong, 13/06/2009 08:42, Uncontrolled Copy, (c) BSI BS ISO 7267-1:2008 ISO 7267-1:2008(E) PDF disclaimer This PDF file may contain embedded typefaces. In accordance with Adobes licensing policy, this file may be printed or viewed but shall not be edited unless the typefaces which are emb
7、edded are licensed to and installed on the computer performing the editing. In downloading this file, parties accept therein the responsibility of not infringing Adobes licensing policy. The ISO Central Secretariat accepts no liability in this area. Adobe is a trademark of Adobe Systems Incorporated
8、. Details of the software products used to create this PDF file can be found in the General Info relative to the file; the PDF-creation parameters were optimized for printing. Every care has been taken to ensure that the file is suitable for use by ISO member bodies. In the unlikely event that a pro
9、blem relating to it is found, please inform the Central Secretariat at the address given below. COPYRIGHT PROTECTED DOCUMENT ISO 2008 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical, incl
10、uding photocopying and microfilm, without permission in writing from either ISO at the address below or ISOs member body in the country of the requester. ISO copyright office Case postale 56 CH-1211 Geneva 20 Tel. + 41 22 749 01 11 Fax + 41 22 749 09 47 E-mail copyrightiso.org Web www.iso.org Publis
11、hed in Switzerland ii ISO 2008 All rights reserved Licensed CopyChinese University of Hong Kong, 13/06/2009 08:42, Uncontrolled Copy, (c) BSI BS ISO 7267-1:2008 ISO 7267-1:2008(E) ISO 2008 All rights reserved iii Foreword ISO (the International Organization for Standardization) is a worldwide federa
12、tion of national standards bodies (ISO member bodies). The work of preparing International Standards is normally carried out through ISO technical committees. Each member body interested in a subject for which a technical committee has been established has the right to be represented on that committ
13、ee. International organizations, governmental and non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. International Standards are drafted in accordance
14、 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 technical committees are circulated to the member bodies for voting. Publication as an International Standard requires ap
15、proval 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 shall not be held responsible for identifying any or all such patent rights. ISO 7267-1 was prepared by Technical Com
16、mittee ISO/TC 45, Rubber and rubber products, Subcommittee SC 2, Testing and analysis. This third edition cancels and replaces the second edition (ISO 7267-1:1997), which has been revised primarily to update the normative references. ISO 7267 consists of the following parts, under the general title
17、Rubber-covered rollers Determination of apparent hardness: Part 1: IRHD method Part 2: Shore-type durometer method Part 3: Pusey and Jones method Licensed CopyChinese University of Hong Kong, 13/06/2009 08:42, Uncontrolled Copy, (c) BSI BS ISO 7267-1:2008 ISO 7267-1:2008(E) iv ISO 2008 All rights re
18、served Introduction The hardness of a roller covering has traditionally been determined on the finished roller, since it is this hardness that is critical to the correct functioning of the roller in its end application. Values of hardness, determined by whichever method is chosen, are therefore depe
19、ndent not only on the method employed and on the rubber, but also on the diameter of the roller, the thickness of the covering and, in the case of thin coverings, on the nature of the roller core. For this reason, the term “apparent hardness” is used to distinguish between the values obtained by met
20、hods described in the various parts of this International Standard and those that would be obtained for the rubber if it was possible to use the standard test methods for standard test pieces forming the subjects of other International Standards. Since rollers vary considerably in size, construction
21、 and end use, and in view of the fact that hardness determinations are made for such different purposes as specification and factory process control, it has not been possible to standardize on one test method. Consequently, three methods are described (see Foreword), each capable of standing alone.
22、Licensed CopyChinese University of Hong Kong, 13/06/2009 08:42, Uncontrolled Copy, (c) BSI BS ISO 7267-1:2008 INTERNATIONAL STANDARD ISO 7267-1:2008(E) ISO 2008 All rights reserved 1 Rubber-covered rollers Determination of apparent hardness Part 1: IRHD method WARNING Persons using this part of ISO
23、7267 should be familiar with normal laboratory practice. This part of ISO 7267 does not purport to address all of the safety problems, if any, associated with its use. It is the responsibility of the user to establish appropriate safety and health practices and to ensure compliance with any national
24、 regulatory conditions. CAUTION Certain procedures specified in this part of ISO 7267 may involve the use or generation of substances, or the generation of waste, that could constitute a local environmental hazard. Reference should be made to appropriate documentation on safe handling and disposal a
25、fter use. 1 Scope This part of ISO 7267 specifies a method for the determination of the apparent hardness, expressed in International Rubber Hardness Degrees (IRHD), of vulcanized- or thermoplastic-rubber roller covers. The method is similar in principle to the methods used for the determination of
26、the hardness of rubber in ISO 48 in that it consists essentially of measuring the depth of penetration of a spherical indentor operating under a specified force. The apparatus used is similar to that described in ISO 48, having a base specifically designed for application to roller covers and simila
27、r curved surfaces. NOTE With some rollers, there may be significant variation in the thickness of the rubber over the surface of the roller, which could affect the measured apparent hardness. 2 Normative references The following referenced documents are indispensable for the application of this docu
28、ment. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. ISO 48:2007, Rubber, vulcanized or thermoplastic Determination of hardness (hardness between 10 IRHD and 100 IRHD) ISO 23529, Rubber G
29、eneral procedures for preparing and conditioning test pieces for physical test methods 3 Time interval between forming and finished grinding, and testing Tests shall not be carried out less than 16 h after forming and/or finished grinding and, for arbitration purposes, not less than 72 h after formi
30、ng. Licensed CopyChinese University of Hong Kong, 13/06/2009 08:42, Uncontrolled Copy, (c) BSI BS ISO 7267-1:2008 ISO 7267-1:2008(E) 2 ISO 2008 All rights reserved 4 Conditioning and temperature of test Whenever possible, the test shall be carried out at a standard laboratory temperature in accordan
31、ce with ISO 23529. The product under test shall, if possible, be maintained under the test conditions for sufficient time to reach temperature equilibrium with the test environment. Where this is impracticable, the period of time and the conditions shall be as given in the product specification (see
32、 Note). The same temperature shall be used throughout any one test or series of tests intended to be comparable. NOTE For large rollers having heavy, metal cores, ambient conditions may not allow equilibrium temperatures to be obtained. 5 Apparatus 5.1 Rollers having a radius greater than 50 mm The
33、apparatus used shall be that described in ISO 48:2007, method CN, CH or CL, as appropriate to the nominal apparent hardness of the roller cover to be tested. The base of the instrument shall have a hole below the plunger allowing free passage of the annular foot such that measurement may be made abo
34、ve or below the base. The lower surface of the base shall be in the form of two cylinders parallel to each other and the plane of the base. The diameter of the cylinders and their distance apart shall be such as to locate and support the instrument on the curved surface to be tested (see Figure 1).
35、Alternatively, the base may be fitted with feet movable in universal joints so that they adapt themselves to the curved surface. 5.2 Rollers having a radius of 4 mm to 50 mm The apparatus used shall be that described in ISO 48:2007, method CN, CH or CL, as appropriate to the nominal apparent hardnes
36、s of the roller cover to be tested. On surfaces too small to support the instrument, jigs or V-blocks shall be provided to support the journals or shafts of the rollers so that the indentor is vertically above the axis of the roller under test (see Figure 2). Wax may be used to support smaller rolle
37、rs. 5.3 Small rollers having a radius less than 4 mm The apparatus used shall be that described in ISO 48:2007, method CM. Jigs or blocks shall be provided to support the roller so that the indentor is vertically above the axis of the roller under test. Alternatively, the roller shall be secured by
38、wax to the instrument table. No test shall be made if the radius is less than 0,8 mm. 6 Procedure 6.1 Firmly locate the roller to be tested with its major axis horizontal and with the area in which the hardness is to be measured uppermost. Place the measuring equipment, with the plunger vertical, on
39、 the roller over the position where the hardness is to be measured and lower the foot into contact with the roller surface. Bring the plunger and the indenting ball into contact with the rubber under the contact force. After 5 s, if the gauge is graduated in International Rubber Hardness Degrees (IR
40、HD), adjust the gauge to read 100 and apply the additional major indenting force. Maintain this force for 30 s and then take the gauge reading as the hardness in IRHD. Licensed CopyChinese University of Hong Kong, 13/06/2009 08:42, Uncontrolled Copy, (c) BSI BS ISO 7267-1:2008 ISO 7267-1:2008(E) ISO
41、 2008 All rights reserved 3 If the gauge is graduated in metric units, note the differential indentation D (in hundredths of a millimetre) of the plunger caused by the additional indenting force, applied for 30 s. Convert this into International Rubber Hardness Degrees as described in ISO 48. During
42、 the loading periods, gently vibrate the apparatus unless it is completely free of friction. Figure 1 Testing surfaces of large radius (R 50 mm) Figure 2 Test jig for surfaces of small radius (4 mm u R u 50 mm) 6.2 Make three measurements at different points at least 6 mm apart within the test area
43、in which the hardness is to be determined. NOTE Several test areas along the length and around the circumference of the roller may be required to determine the average hardness of the covering and the hardness variation over a single roller (see ISO 6123-1, Rubber or plastics covered rollers Specifi
44、cations Part 1: Requirements for hardness). 7 Expression of results Express the apparent hardness as the median of the three measurements for each test area, reported in IRHD to the nearest whole number. Licensed CopyChinese University of Hong Kong, 13/06/2009 08:42, Uncontrolled Copy, (c) BSI BS IS
45、O 7267-1:2008 ISO 7267-1:2008(E) 4 ISO 2008 All rights reserved 8 Test report The test report shall include the following information: a) a full description of the roller and its origin; b) a full reference to the test method used, i.e. the number of this part of ISO 7267; c) test details: 1) the ti
46、me and temperature of conditioning prior to testing, 2) the temperature of test, and the relative humidity, if necessary, 3) details of any procedures not specified in this part of ISO 7267; d) test results: 1) the number of areas or rollers tested, 2) the individual test results, 3) the apparent ha
47、rdness, expressed in IRHD (see Clause 7); e) the date of the test. Licensed CopyChinese University of Hong Kong, 13/06/2009 08:42, Uncontrolled Copy, (c) BSI BS ISO 7267-1:2008 Licensed CopyChinese University of Hong Kong, 13/06/2009 08:42, Uncontrolled Copy, (c) BSI BS ISO 7267-1:2008 ISO 7267-1:20
48、08(E) ICS 83.140.99 Price based on 4 pages ISO 2008 All rights reserved Licensed CopyChinese University of Hong Kong, 13/06/2009 08:42, Uncontrolled Copy, (c) BSI BS ISO 7267-1:2008 This page has been intentionally left blank Licensed CopyChinese University of Hong Kong, 13/06/2009 08:42, Uncontroll
49、ed Copy, (c) BSI BS ISO 7267-1:2008 BSI Group Headquarters 389 Chiswick High Road, London, W4 4AL, UK Tel +44 (0)20 8996 9001 Fax +44 (0)20 8996 7001 standards BSI - British Standards Institution BSI is the independent national body responsible for preparing British Standards. It presents the UK view on standards in Europe and at the international level. It is incorporated by Royal Charter. Revisions British Standards are updated by amendment or revision. Users of British Standards should m
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