ISO-9008-1991.pdf
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1、INTERNATIONAL STANDARD IS0 9008 First edition 1991-12-15 Glass bottles - Verticality - Test method Bouteilles en verre - Verticalit vertical axis deviation: Horizontal deviation of the centre of the container finish from a theoretical vertical line through the centre of the base. This deviation is e
2、qual to half the diameter of the circle described by the centre of the finish when the bottle rotates around the vertical axis through the centre of the base. 3.2 verticality tolerance: The limits outside which the verticality shall not deviate when the bottle is placed on a flat horizontal surface.
3、 4 Apparatus 4.1 The apparatus shall be capable of maintaining the base of the bottle horizontal and of measuring the deviation of the finish from the vertical to an ac- curacy of 0,l mm. Various types of apparatus exist: for example, measurements can be made a) by comparison with a horizontal scale
4、; b) by using a dial gauge, and c) by projecting a magnified shadow on a scale. In all cases, the measurements are carried out on the outside of the ring (finish). 4.2 For round bottles, the simplest form of appar- atus is a verticality gauge which comprises a baseplate fitted with a V-block, or a r
5、otatable plate with a three- or four-jaw self-centring chuck, and a vertical pillar carrying a horizontal scribe or dial gauge which is adjustable with regard to height and length. A non-touching light-scanning apparatus may also be used. 4.3 For non-round bottles, a device should be used which enab
6、les the bottle to be held In the centre of a rotatable plate. 4.4 Apparatus other than that specified in this clause may be used provided that the same degree of accuracy is obtained. 5 Sampling Sampling shall form the subject of agreement be- tween the parties concerned. 1 Copyright International O
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