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Defective
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Causes
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Solution
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Oblate Shrinkage
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1) Control adjustment is not correct
2) Not produced in minus tolerance
3) Cutting head is too small
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Found defective ,you should cut it and redraw again
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White Shining
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1) Lead adhesion
2) Mould core is too thick
3) Mould hole is not clean up
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1) Improve quality of heat-treatment
2) Redraw the steel wire after dried
3) Replace mould core
4) Clean up the mould hole and smear soap
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Scratch
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1) Poor lubricating
2) Steel wire is not clean
3) Mould is not installed correctly
4) Oxide in mould hole
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1) Increase lubricating
2) Clean up steel wire
3) Install mould correctly
4) Replace new mould
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Die Noising in Drawing
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1) Poor lubricating
2) Compressibility is too small
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1) Increase lubricating
2) Adjust mould line number
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Die Cracked in Drawing
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1) Sleeve inlayed incorrectly
2) Compressibility is too big
3) Die’s angle is too small
4) Sleeve’s toughness is not enough
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1) Sleeve inlayed correctly
2) Change line number
3) Reduce compressibility
4) Improve sleeve material
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Wires Defective
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1) Steel wire surface severe mixed with other particles
2) Steel wire inner severe mixed with other particles
3) Residual hole-shrinkage in the inner of steel wire
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Cut out the defective ones
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Oblate Wire
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1) Dies installed incorrectly
2) Dies’ frame putted incorrectly
3) Dies’ hole unrounded
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1) Adjust the dies and its frame
2) Change new dies
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Red wire blued
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1) Poor Lubricating
2) Dies’ angle and height is incorrect
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1) Increase lubricating
2) Change new dies
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