摘要:
A weftless warp of yarns being drawn and wound on a beam is fed through a tension detector, located prior to the drawing step and responsive to tension in any of the yarns equalling a predetermined non-zero level, for stopping the process. This prevents damage to or breakage of a yarn which might have become snagged in the warp source.
摘要:
A warping system for reducing tension in a plurality of yarn ends wound by the warping system onto an outer diameter of a beam. The warping system minimizes the number of contact points as yarn is pulled off of yarn packages in a creel and wound onto the beam. After exiting a tube, yarn passes over a roller and an expansion comb before being wound onto the beam. The yarn extends between the roller and the beam substantially in a yarn plane. The yarn can contact the warping system at only one contact point between the roller and the beam.
摘要:
A warping system for reducing tension in a plurality of yarn ends wound by the warping system onto a beam. The warping system minimizes the number of contact points as yarn is pulled off of yarn packages in a creel and wound onto the beam. After exiting a tube, yarn passes over a roller and an expansion comb before being wound onto the beam. The yarn extends between the roller and the beam substantially in a yarn plane. The yarn can contact the warping system at only one contact point between the roller and the beam.
摘要:
A brake arrangement is intended for or can be assigned. to a number of threads or yarns which can be fed in or to a textile machine, for example a weaving machine. The brake arrangement comprises two units (1,2) which have thread or yarn parts (11, 12, 13, 14, 15, 16, 17) lying between them and which are pressed towards each other by actuating members (3, 4, 5, 6 and 7, 8, 9, 10, respectively), which units (1, 2) cooperate with the thread or yarn parts via two opposite surfaces (1a and 2a, respectively) which are made of smooth material and are set substantially parallel by the cooperation with the thread or yarn parts. The actuating member is arranged to exert, via the unit, press forces (F) on the thread or yarn parts which are substantially identical, on the one hand, on the different thread or yarn parts and, on the other hand, along at least part of the length of the respective thread or yarn part.
摘要:
A warping system for reducing tension in a plurality of yarn ends wound by the warping system onto an outer diameter of a beam. The warping system minimizes the number of contact points as yarn is pulled off of yarn packages in a creel and wound onto the beam. After exiting a tube, yarn passes over a roller and an expansion comb before being wound onto the beam. The yarn extends between the roller and the beam substantially in a yarn plane. The yarn can contact the warping system at only one contact point between the roller and the beam.
摘要:
During the relative displacement between a warping stand with a warping drum and a beaming stand with a warp beam for rewinding a thread group, mutual support takes place at a supporting bearing. In this way, very high warp tensions can be adopted, without the risk that the warping stand will tilt and without the latter having to be loaded with additional weights.
摘要:
A brake arrangement is intended for or can be assigned to a number of threads or yarns which can be fed in or to a textile machine, for example a weaving machine. The brake arrangement comprises two units (1, 2) which have thread or yarn parts (11, 12, 13, 14, 15, 16, 17) lying between them and which are pressed towards each other by actuating members (3, 4, 5, 6 and 7, 8, 9, 10, respectively), which units (1, 2) cooperate with the thread or yarn parts via two opposite surfaces (1a and 2a, respectively) which are made of smooth material and are set substantially parallel by the cooperation with the thread or yarn parts. The actuating member is arranged to exert, via the unit, press forces (F) on the thread or yarn parts which are substantially identical, on the one hand, on the different thread or yarn parts and, on the other hand, along at least part of the length of the respective thread or yarn part.
摘要:
The invention is concerned with a mode of operation and a device to bring parallel fibres, threads or yarns from different delivery points and with individual unequal exit force to the same tension each with the others. The invention consists of three processing steps: decreasing the tension of the fibres from an arbitrary individual tension level to a tension level of about zero; slippage-free transport of the fibres through a slip lock unit with a known velocity determined beforehand; increasing the tension of each and every fibre from a tension level of about zero to the required collective tension level.
摘要:
A tension device is utilized for equalizing, or at least reducing differentials in tension across strands in a web. The device utilizes an overfeed roll which rotates faster than the speed of feeding the web. Strands at the desired tension, or less, slip about the exterior surface of the overfeed roll. Strands which are greater than the desired tension have sufficient friction to be rotated, at least temporarily, by the overfeed roll to thereby create slack in the higher tension strands to equalize the tension relative to the other strands. Feedback from feed rolls, support rolls, and/or the overfeed roll may be utilized to adjust the speed of the overfeed roll.
摘要:
Method for warping with a cone sectional warping machine, which winds threads in bands on a warping drum, wherein a support for a thread guide comb and the warping drum are displaced in relation to each other in correspondence with the increasing thickness of winding and predetermined warping data. The first band is monitored during a first measuring phase by a roll exerting contact pressure and the monitored displacement path is recorded as a function of the number of rotations of the warping drum. Roll pressure on the winding during the measuring phase is continuously monitored using measuring techniques. Displacement of the support is corrected if monitoring results differ from a predetermined setpoint. In order to even out the formation of the wind, the roll is arranged at a given distance from the warping drum when warping of the first band is started. The monitoring of the roll is automatically started with increasing thickness of the winding as soon as the winding causes the roll to rotate.