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BS EN ISO 7623:2015 pdf free

BS EN ISO 7623:2015 pdf free.Steel cord conveyor belts一Cord-to-coating bond test
BS EN ISO 7623 specifies a method for determining the bond strength of metal cords to their surrounding coating, either in the initial state or after thermal treatment.
It applies exclusively to metal-carcass conveyor belts.
The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
ISO 18573, Conveyor belts一Test atmospheres and conditioning periods
ISO 7622-2, Steel cord conveyor belts一Longitudinal traction test一Part 2: Measurement of tensile strength
Measurement of the force required to tear one of the steel warp cords out of the carcass by applying tensile stress along the axis of the cord.
Dynamometric tensile testing machine with jaws, in accordance with that described in ISO 7622-2.
Press, having two heated platens, temperature controlled to 145 °C±5 °C, and capable of applying a pressure on the specimen (see Clause 6) of between 1 MPa and 5 MPa.
Take from the sample of the belt piece undergoing thermal treatment, or not, three specimens of the following dimensions:
a) length in the longitudinal direction of the belt, SL min: 350 mm for cords up to 5 mm in diameter, or 450 mm for cords over 5 mm in diameter;
b) width: such that the specimen contains five warp cords;
c) thickness: thickness of the belt including both covers.
In the centre of the specimen, trace the limits of the test length L, defined in Table 1.
Using a knife, remove the cover and weft, if any, along at least 10 mm on either side of the test length L,so that the five warp cords are laid bare on both sides.
On one side, cut the centre cord as close as possible to the test area (see Figure 1 or Figure 2).
On the other side, cut the four cords on either side of the centre cord, as close as possible to the test area (see Figure 1 or Figure 2).
With a knife, detach the coating at the ends of the cut cords.
Take care not to damage the cord to be bond-tested.BS EN ISO 7623 pdf download.

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