Abstract: Disclosed is a filament winding apparatus comprising a winding mechanism having a pair of arms for winding traversed filamentary yarns impregnated with a resin onto a plurality of mandrels, respectively, and a mandrel retaining mechanism having mandrel receiving portions by a number of at least two times of the number of the mandrels to be set on the arms of the winding mechanism. The arms are swung between a winding position and a mandrel exchange position of the mandrel retaining mechanism. The retaining mechanism is a little moved when the mandrels are exchanged. A plurality of mandrels can be easily and efficiently exchanged at the same time without a particular device. The number of the mandrels for simultaneous filament winding can be increased and a high productivity can be obtained. Further, this apparatus can be realized at a relatively low cost.

Abstract: A system for producing a drawn yarn having a durable mechanical and thermal stability in practical use from a fiber-forming polymer by means of a single continuous process is disclosed. A yarn extruded from a spinneret is first introduced into a liquid bath for cooling and subsequently to a hot chamber filled with a pressurized steam for heat-treatment, in which the yarn is drawn against a resistance caused by the liquid bath. The vessel of the liquid bath is provided with a yarn exit path adapted to allow the passage of the yarn but inhibit the leakage of the liquid and to remove a concomitant liquid from the yarn. The hot chamber is provided with inlet and outlet paths for the yarn also adapted to allow the passage of the yarn but inhibit the leakage of the steam. The system is suitable for producing for industrial use a yarn composed of thicker individual filaments.

Abstract: A yarn winding apparatus for high speed yarn winding with long spindles and multiple bobbins having a reduced diameter, the apparatus having spindles with one or both of the bobbin holder or driving shaft made of a composite layer made of reinforcing fibers and a matrix component and a supporting member made of metal provided on at least one of an inner surface and outer surface of the composite layer.

Abstract: A thermoplastic polymer yarn is spun into a spinning tube charged with a pressurized gas of more than 1 kg/cm.sup.2 G and withdrawn through a yarn exit provided with a unique sealing device which substantially prevents the charged gas from leakage but allows passage of the yarn out from the spinning tube. The resultant yarn has a high molecular orientation due to the improved quenching effect and the increase of resistance against yarn travelling of the charged gas.

Abstract: A method of balancing a spindle in a yarn winder comprising,(a) a base for supporting a yarn take-up means,(b) the yarn take-up means including,(b-1) a spindle driving mechanism mounted to the base,(b-2) a long spindle comprising,(b-2-1) a bobbin holding portion more than 800 mm in length including a first cylindrical hollow body, a cylindrical and substantially solid body connected to the first cylindrical hollow body and a second cylindrical hollow body connected to the cylindrical solid body, and(b-2-2) a shaft extending from a center of the inner end of the cylindrical solid body along the axis thereof through the interior of the second cylindrical hollow body and projecting therefrom, the shaft being connected to the spindle driving mechanism,(b-3) bearing means for rotatably supporting the spindle on the base, and(b-4) a bobbin holding mechanism secured around the periphery of the bobbin holding portion, for detachably mounting thereon at least a bobbin for taking up a yarn,the steps which comprise bala

Abstract: A thermoplastic polymer yarn is spun into a spinning tube charged with a pressurized gas of more than 1 kg/cm.sup.2 G and withdrawn through a yarn exit provided with a unique sealing means which substantially prevents the charged gas from leakage but allows passage of the yarn out from the spinning tube. The resultant yarn has a high molecular orientation due to the improved quenching effect and the increase of resistance against yarn travelling of the charged gas.

Abstract: A yarn winder provided with a long spindle (1) having a length of, for example, more than 800 mm, and free from vibration even when used at a high working rotation is provided by various aspects of the present invention. According to a first aspect, the dynamic unbalance of the spindle (1) is corrected by field-balancing in at least three planes including the mid-portion of the spindle (1) by an influence coefficient matrix method. According to a second aspect, the respective spindle (1, 14) mounted on a revolving drum (9) has a natural frequency different from each other so that no resonance occurs when the two spindles (1, 14) are rotated at substantially the same rotational speed. According to a third aspect, a bobbin holding portion (2) of the spindle (1) is formed by two cylindrical hollow bodies (103, 104) each having shorter length that can be easily machined without eccentricity.

Abstract: A thermoplastic polymer is melt-spun into a spinning tube decompressed to not more than 0.7 atm and withdrawn therefrom to the outer air through a narrow groove provided in a bottom sealing body which substantially seals the interior of the spinning tube from the outer air. The bottom sealing body is provided with a plurality of regulating chambers communicating with the groove, which chambers are controlled to have interior pressures of intermediate values between those of the spinning tube and the outer air, whereby the pressure pulsation of an air stream flowing into the interior of the spinning tube from the outer air through the groove can be avoided. This, in turn, ensures a smooth spinning operation and uniform yarn quality.

Abstract: A yarn winding apparatus having a traverse guide to catch a yarn and traverse it in an axial direction of a bobbin onto which the yarn is taken and a pair of yarn release guides which, located inside of and in the vicinity of both ends of the full traverse stroke Wo corresponding to the full width Wp of a yarn package, can go into or out of the path of the yarn. The traverse guide may be either a cam traverser or a rotary blade traverser. The yarn winding is done by repeating the step of repeatedly traversing the yarn over a full traverse stroke Wo and the step of repeatedly traversing the yarn over a narrow traverse stroke W narrower than the full traverse stroke Wo.

Abstract: A yarn feeding means comprising a yarn detaching guide positioned in the vicinity of a positively rotating roller for feeding a yarn continuously fed from a supply source to a yarn winder and capable of selectively occupying either of two positions, one of which is a retractive position where the detaching guide is non-operative to the yarn path and the other is a projective position where the detaching guide is engageable with the yarn path to detach the yarn from the positively rotating roller. The yarn detaching guide holds the yarn during the threading operation away from the feed roller whereby the yarn can be withdrawn even by a standard capacity suction gun irrespective of a high surface speed of the feed roller. A winder comprising the yarn detaching guide is also provided.

Abstract: An apparatus for winding a plurality of yarns comprises:a pair of spindle frames independently and horizontally movable along parallel passages;each of the spindle frames having a plurality of rotatable spindles horizontally projecting therefrom, which are vertically superposed and which are axially displaced by a predetermined length from the top spindle to the bottom spindle;a threading arm frame disposed at the center of the spindle frames and having threading arms pivotally mounted thereon, the number of the threading arms being the same as that of the spindles mounted on each spindle frame, and the threading arms are axially displaced by the predetermined length from the top arm to the bottom arm; andinduction motors connected to the rotatable spindles, respectively.

Abstract: The present invention relates to a yarn winding apparatus wherein a yarn is wound on a bobbin tube at a constant wind ratio. According to the present invention, the rotational speed of a winding spindle is electrically controlled in accordance with yarn tension and the rotational speed of a traverse element driving shaft is electrically controlled relative to the rotational speed of the winding spindle in such a manner that the wind ratio is kept constant.

Abstract: A high speed yarn feeding apparatus for feeding yarn from a yarn supply source to a yarn take-up apparatus is disclosed which is capable of being threaded by conventionally employed suction nozzles. The yarn feeding apparatus employs at least one stepped godet roller having a small diameter portion on which the travelling yarn is initially threaded. A yarn hooking means is provided on the peripheral surface of the stepped side of the large diameter portion of the stepped roller. Means is provided upstream of the stepped roller for shifting the travelling yarn from a position aligned with the small diameter portion to a position aligned with the large diameter portion of the stepped roller. The yarn hooking means can take various conformations and more than one hooking means can be provided on a single stepped godet roller.

Abstract: Yarn winding apparatus comprises means for supplying yarn at a constant speed, a winder having a yarn traverser and a fixed guide acting as a pivot for the traverse motion of the yarn.The apparatus includes a force transducer for generating an electrical signal indicating yarn tension, a rotary pulsing guide for periodically deflecting the yarn to bring it into contact with the force transducer, a setting device for generating an electrical signal indicating a predetermined desired value of yarn tension, a comparator for producing an error signal indicating the difference between the force transducer electrical signal and the setting device electrical signal, and a regulator for regulating the speed of rotation of the winding spindle in response to the difference between the foregoing signals.