back comb, It provides the function of feeding warp threads regularly and checking for thread faults. Generally, stainless steel wire types are common. Normally a back comb is used for each passage. However, for two or more works being pulled close to each other, using a back comb is sufficient. In exceptional cases, for example; When there are yarns from two layers, two back combs should be used for each passage. The reed width is determined by the amount of space available, the warp material and the sliver width. If the number of slots is the same and only one yarn is to be drawn from each slot, the tooth pitch of the rear comb is normally 20 to 30% wider than that of the front comb. In other words, it is understood that the front comb is thinner than the back comb. The warp threads should be distributed on the back reed as spaced as possible, with one thread in each tooth spacing.
The task of the stop device, which controls the rear comb and can be used optionally, is to prevent the warp threads drawn from the warp beams from being damaged by irregularities such as cramped, knotted and thick places from damaging the lamellar or strengths.
It is primarily used for productions with very sticky, highly twisted yarns and high warp density. The rear comb is forced into the uppermost position by a torsion (reverse) spring. In this case, it is not possible for the knotted warp threads to pass through the back comb. The thick/knotted sections of the yarn pull the rear comb down and make contact with the spring, breaking the electrical circuit and shutting down the machine. The comb height is adjusted depending on the condition of the warp beams. If there are more beams, there is a thicker back comb, more unbalanced comb teeth. If it is not desired to stop at the rear reed by ignoring the warp irregularities less, the rear reed is chosen thicker so that knots or irregular yarn thicknesses can be easily pulled between the teeth of the rear reed without causing the machine to stop.
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