KR850700048A - Four drift systems - Google Patents

Abstract

No content

Description

Four drift systems

As this is a public information case, the full text was not included.

3 is a schematic diagram of the draft system of the present invention utilizing a low friction free-rotating heated roll and stabilization device.

Claims (13)

Driven supply means for supplying the yarn at a predetermined speed; Driven discharge means for charging said yarn at a second predetermined speed higher than said speed; A low friction freely rotatable heated rool whose surface is heated at a predetermined rate and positioned between the driven supply means and the driven discharge means; And a separator roll disposed adjacent to the freely rotatable heated roll, wherein Sangig yarn winds around the freely rotatable roll and the separator roll several times, and the heated roll of the free rotation has a surface velocity. It operates slightly faster than the surface speed of the driven supply means, and the heated rool of the free rotation is driven by contact with the yarn, thereby applying a pretension to the yarn before the yarn contacts the heated roll of the free rotation. Sufficient yarn tension is automatically provided upstream of the heated roll of the free rotation to impart, a drift occurs near the position where the yarn leaves the heated rotor of the free rotation to pass towards the driven discharge means, (a) the steady state resistance to rotation of the free and heated rolls and separator rolls of 0.25 g / denier (drifted yarn), as measured by the capacity of the drift yarn; (b) The starting resistance, which is primarily the inertia of a roll heated by free rotation, is When obtained from T = CWK ² α or Is less than In the above equation, T = torque (length X force), C = constant dependent on the selected unit, K = radius of rotation (units of length), α = each magnetic velocity (in radians / sec ² ), and W = weight (units of mass). (c) the coefficient of friction between the yarn and the surface of the heated rool of the free rotation, as measured by a Rothschild Friction Tester (based on the Capstan's equation) using 180 ° contact at a 10 m / min dead velocity, , (d) the contact angle between the surface of the rool and the free heated heating yarn at the first winding 30 ° and at the final winding before the yarn leaves the heated roll of the freewheel. The separator roll is disposed at a position relative to the direction of the heated roll of the free rotation and the interpass passage so that it is 30 degrees. (e) A yarn draft system in which no frictional contact is provided to the yarn in a region where pretension occurs between the position where the yarn leaves the driven supply and the position where the yarn first contacts the heated roll of the free rotation. The steady state resistance to rotation of the free rolled heated and separator rolls when measured by the force on the drifted yarn is <0.15 g / denier (drifted yarn), and the starting Resistance is approximately or Draft system. The draft system of claim 1 wherein the coefficient of friction is in the range of 0.75-0.95. The method of claim 1, wherein the separator roll is as shown in FIG. And a draft system disposed at a position with respect to the direction of the free-rolled heated rool and yarn moving passages so as to be within an angle indicated by. The graft system of claim 1, wherein the separator roll is disposed at a position relative to the direction of the freely rotated heated roll and yarn movement passages such that the separator roll is in quadrant “a” shown in FIG. 4B of the figure. The draft system of claim 1 comprising means for thermally stabilizing yarns. 7. The draft system of claim 6, wherein said means for thermally stabilizing yarns is located between said freewheeling heated rool and said driven discharge means. 7. The draft system of claim 6, wherein said means for thermally stabilizing yarns is means for heating a driven discharge means. 2. The draft system of claim 1, wherein at least 60% of the yarn stretching force is provided upstream of the free rolled heated roll. The drift system of claim 1, wherein 80-95% of the yarn tension is provided upstream of the free rolled heated roll. The drift system of claim 1, wherein the low friction free rotation heated roll is rotatably supported by an air bearing. The drift system of claim 1, wherein the low friction free rotation heated roll is rotatably supported by a ball bearing. 7. The method of claim 6 wherein said yarn is a polyester yarn and said predetermined temperature of said surface of said freely rotated heated roll is about 80 ° C. and about 120 ° C., said means for thermally stabilizing said yarn. The temperature of the draft system is determined so that the temperature of the yarn is about 120 ° C-about 220 ° C when leaving the means for thermally stabilizing the yarn. ※ Note: The disclosure is based on the initial application.