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How to test a zipper on the check assembly of the chain belt is firm? Steps are as follows:
With the same pull strength test equipment, test speed and strong pull test. According to the fixture: pull structure selection into the type or clamping fixture, jig fixture using chain pull force test. The interception of a length of about 50mm with only a chain, with a stopper chain upward, another into the fixture, locking. The pull piece is loaded into the upper clamp, and the material testing machine is counted to zero. Start the test machine, until the chain is broken or pull head prolapse, the instrument display value is only strong.
Let us next to test check assembly on the chain belt, a strong: check strength test equipment, test speed and fixture and test the flat wise tensile equally powerful. Steps are as follows:
From stop to the interception of the length about 50mm with slider chain a (self-locking pull head should be the first line self-locking function), will pull head pull down to the stop end (pull turn to stop end), from the end of the truncated down 10mm chain teeth after the removal of, are respectively clamped in the clamp and lock. At this point, the length of the teeth on both sides of the fixture chain should be equal, up and down the top of the fixture spacing of about 75mm. material test machine count to zero. Start the testing machine, test to the zipper damage, the strength of this time is to check the strength of the zipper.
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You may also like to read:How to test the strength and check on unilateral zipper strength