摘要:
Accumulation-type thread feeder including: a body, which bears a rotary drum on which turns of thread from a spool are wound; a tension sensor for detecting value of tension of exiting thread and a detector for detecting thread quantity accumulated on the drum; a light-reflecting element on the drum or functionally associated therewith, such light generated by light a generator borne by a support arranged alongside the drum, the support associated with a detector to detect light reflected by the reflecting element, the reflected light varying as a function of the quantity of thread wound on the rotary drum, the detection allowing detection of such thread quantity. The detector is a light-sensitive member directly receiving the light reflected by the reflecting element along the entire surface of the drum, the member allowing determination of thread density on the drum.
摘要:
A device for the constant tension feeding of threads fed to a textile machine, said machine being apt to produce a manufactured product, said feeding taking place in a discontinuous way that is with phase sequences wherein the thread motion takes place with a first and a second feeding or absorption state, said states following each other in time, comprises tension detecting means (3), thread accumulating means (4) and control means (40) connected to said detecting means (3) and accumulators (4) and apt to intervene on the latter based upon a tension value obtained from said detecting means; compensating means (11) is provided arranged between said accumulating means (4) and said tension detecting means (3) apt to cooperate with such thread (8) so as to compensate a variation of the feeding or absorption state of the latter upon the passage between each first and each second feeding or absorption state following the first one.
摘要:
A modular element of creel (1) including a structure (2) having at least one support (22, 23) suitable to support a reel or yarn spool (25, 26); the structure (2) is in the form of a solid polygon and includes a feeder device (30) suitable to allow the feeding of the thread developed by such spool (25, 26) with at least one characteristic, selected between the characteristics of tension and speed, maintained constant and equal to a preset fixed value or function of the operational phase of the machine, said structure (2) being able to be modularly coupled to other similar structures (2) so as to allow the feeding of more yarn to a textile machine, every yarn fed by every modular element (1) having its own selected characteristic defined by the feeder device associated with such modular element (1).
摘要:
A method for feeding a thread at a preset drawing to a textile machine includes a first feeder which sends the thread to the textile machine and a second feeder arranged spaced from the first feeder and which sends such thread to the latter, each feeder having a rotary member on which there is partly wound the thread before the feeding thereof and a speed sensor adapted to detect the rotational speed of such rotary member and a tension sensor to detect the tension of the thread exiting from each feeder. Controlling drawing the thread sent to the textile machine by controlling and adjusting the ratio between the rotational speed of the rotary member of the first feeder and the rotational speed of the rotary member of the second feeder.