摘要:
A grooved traverse drum for winding yarn on to a bobbin comprises a yarn guide groove spirally formed in an external surface thereof and including inversely running forwarding and returning paths connected with each other at a pair of turning points situated at opposite ends of the drum, portions of the forwarding and returning paths immediately following the respective turning points having a greater lead angle so that the yarn being guided moves towards the center of the drum as quickly as it passes the turning points, thereby preventing the formation of stitch at end surfaces of a yarn package being produced.
摘要:
A grooved traverse drum for an automatic winder and method for manufacturing the same. An iron metal traverse drum having extremely thin walls is formed by instantaneously injecting a molten metal into a limited cavity of a mold having a form corresponding to the traverse drum in an oxygen-free atmosphere.
摘要:
Method of avoiding the formation of irregular thread turns during the winding of a cross-wound coil driven by a drive drum formed with reversing thread grooves cooperating with a thread guide, a rotating element connectible to the cross-wound coil being braked with a varying braking force, which comprises the steps of continuously varying the peripheral velocity of the drive drum, and simultaneously braking, at least one of the cross-wound coil and the rotating element connected thereto, with a variable braking force in such manner that the peripheral velocity of the cross-wound coil remains constant within given tolerance limits.
摘要:
Grooved rotary yarn distributor for the winding of bobbins of conical or varioconical shape, the distributor having a reversible, crossing helical groove, and a variable radius of the groove bottom, the conical and varioconical bobbins having a variable crossing angle of the wound yarn. The bottom of the distributing groove of the yarn distributor has a first derivative of the axial coordinate of the groove bottom is, according to the angular coordinate, an increasing function of the angular coordinate in the proximity of a selected point in the case, when the first derivative of the radius of the groove bottom according to the angular coordinate is a decreasing function of the angular coordinate in the proximity of the selected point, and is decreasing in the case, when the first derivative of the radius of the groove bottom, according to the angular coordinate is an increasing function of the angular coordinate in proximity of the selected point upon growth of the axial coordinate of the groove bottom only in the direction of distribution from the small end towards the large end of the conical or varioconical bobbin from zero to the maximum value of stroke of the grooved rotary yarn distributor.
摘要:
The invention concerns an improved yarn package, process and apparatus. The improved package has particular utility in automated processes for making melt spun yarn. Broadly, the invention comprises (a) a cross wound package of melt spun flat filament yarn that is characterized by the yarn's outer end being pile wound in a compact bunch on the cross wound package's surface, the yarn end comprising at least twenty pile turns, the pile turns comprising upstream pile turns and downstream pile turns, and wherein the upstream pile turns partly underlap the downstream pile turns; and (b and c) modifications to conventional process and conventional apparatus for winding yarns, in order to make such packages, particularly at speeds greater than 3000 mpm.
摘要:
There is described a spooling machine comprising a displacement device to reciprocate the material to be spooled during the spooling thereof, along the lengthwise axis of the bearing axis, said displacement device comprising a pattern roller mounted relative to the frame which is provided with a first endless groove that runs alternately as a screw-thread over the pattern roller, means to drive the pattern roller, a guide member for the thread-like material which enters with a portion thereof in the pattern roller and a guideway over which the guide member is reciprocable along the pattern roller, with the pattern roller also including a second groove, for guiding the thread-like material, at least next to the point of inflection of the first groove.
摘要:
An improved construction of a rotary yarn-distributing cylinder cooperable with a yarn take-up bobbin at the output of an open-end spinning machine or similar textile apparatus is described. The major portion of the periphery of the distributing cylinder is formed by or covered with a smooth material having a high coefficient of friction to promote efficient driving engagement with the adjacent bobbin. The boundaries of the first surface region are separated from the respective edges of the inclined distributing grooves on the cylinder periphery by second surface regions in the form of smooth strips. The strips exhibit a coefficient of friction considerably lower than the coefficient of the material of the first surface region to permit smooth and unretarded payoff of the yarn in the grooves to the bobbin as the cylinder rotates.
摘要:
A method and an apparatus for winding a yarn on a package in which the wind number of the package is changed regularly or rapidly at random in relation to the traverse of the yarn. A traverse drum having a plurality of grooves of different wind number and a branch portion of the traverse grooves is used to wind the yarn.