Toray Engineering Company, Limited

Yoshiro Migaki

Takashi Iwade

Jun Takagi

A yarn winder in which a fluctuation of winding tension is avoided and the winding characteristics are made uniform from the most inner to the most outer layer. Yarn is wound by a winder in which a spindle 2 having a positively driven pressure roller 5 is positively driven, the pressure roller 5 being positioned so that it is not in contact with a tube 100 immediately after the yarn setting operation. After a predetermined amount of yarn layer has been wound on the tube 100, the pressure roller 5 is moved so that it contacts the yarn layer on the tube 100. The surface speed of the pressure roller 5 is controlled to be higher than that of an empty tube until the yarn is switched to the empty tube, wherein the controlled speed is approximately the same as or lower than the surface speed of a fully loaded tube, and the surface speed of the pressure roller is controlled to be approximately the same as the surface speed of the empty tube after the yarn has been switched to the empty tube.

Method for controlling the drive of a yarn winder, and the yarn winder

A yarn winder in which a fluctuation of winding tension is avoided and the winding characteristics are made uniform from the most inner to the most outer layer. Yarn is wound by a winder in which a spindle 2 having a positively driven pressure roller 5 is positively driven, the pressure roller 5 being positioned so that it is not in contact with a tube 100 immediately after the yarn setting operation. After a predetermined amount of yarn layer has been wound on the tube 100, the pressure roller 5 is moved so that it contacts the predetermined amount of yarn layer has been wound on the tube 100, the pressure roller 5 is moved so that it contacts the yarn layer on the tube 100. The surface speed of the pressure roller 5 is controlled to be higher than that of an empty tube until the yarn is switched to the empty tube, wherein the controlled speed is approximately the same as or lower than the surface speed of a fully loaded tube, and the surface speed of the pressure roller is controlled to be approximately the same as the surface speed of the empty tube after the yarn has been switched to the empty tube.

Yarn winding roller drive

To improve the success rate of yarn switching by reducing the variation of the winding tension during the yarn switching operation, a turret type yarn winder is provided, wherein the upper yarn switching mechanism 8 and the lower yarn switching mechanism 9 are provided at positions wherein, when the empty bobbin 50 held by the spindle 4 is displaced by the rotation of the turret member 2 toward the yarn 60 supported by the respective yarn path restriction guides of the yarn switching mechanisms 8, 9, the circumference of the empty bobbin 50 is brought into contact with the yarn 60 at a contacting angle, which angle increases as the turret member rotates, and wherein the dog portion 30 mounted to the turret member 2 causes the yarn searching guide 25 of the lower yarn switching mechanism 9 to rotate in synchronism with the rotation of the turret member 2, and the guide plate 31 for forming the anchor yarn winding is actuated to move the yarn 60 in the axial direction of the bobbin 50.

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Otsu, Japan

Yoshiro Migaki