JPH0220735B2 - - Google Patents

Description

[Detailed description of the invention]

[Industrial Field of Application] The present invention relates to a method for producing composite false twisted yarn having a slab-like form. [Prior art] A method for producing slab-like yarn by false twisting is known from Japanese Patent Publication No. 45-28018, Japanese Patent Publication No. 43-28258, etc. A method is known in which a yarn is fed with another yarn in an overfeed state. [Problems to be Solved by the Invention] In the yarn slab obtained by the conventional method, since the supply rate of oversupplied yarn is constant, the occurrence frequency is within a certain width. Moreover, the slab spacing was at most 10-odd centimeters. In addition, the middle part of the yarn obtained by the conventional method has a structure in which one yarn is tightly wound with other yarns, so it is possible that the yarn has a slick feel. The yarn did not have a soft luster. [Means for Solving the Problems] The present invention provides a method for attaching a yarn that is being false-twisted to a support provided substantially parallel to the yarn in a false-twisting region of the yarn. , a method for producing composite false-twisted yarns, characterized in that effect yarns are over-fed at random time intervals through effect yarn guides that slide freely according to the tension of the effect yarns. To explain the present invention with reference to FIG. 1, the effect yarn 2 is being subjected to the false twisting process in the false twisting region through the effect yarn guide 8 that slides freely according to the tension along the support 7. Combines with core yarn 1. When the effect yarn 2 is oversupplied, the tension when merging with the core yarn 1 decreases,
The effect yarn guide 8 falls along the support 7 due to its own weight. The moving direction of the effect yarn guide 8 is the same direction as the running direction of the core yarn 1. When the oversupply of the effect yarn 2 is reduced and the tension becomes equal to or higher than the yarn feeding tension of the core yarn 1, the effect yarn guide 8 moves upward along the support 7 due to the tension of the effect yarn 2. in this way,
When the effect yarn 2 is over-supplied and the effect yarn guide 8 falls from the state where the effect yarn guide 8 is located above, a wrapped structure is formed and a slab portion is created. Therefore, the length of the slab is the product of the falling time and the falling speed of the effect yarn guide 8. However, the longer the falling time, the longer the slab length;
In reality, there is a limit to the length of the twisted region of the core yarn. Therefore, it is necessary to increase the falling speed. In order to increase the falling speed, the guide 8 is attached to be slidable along the support 7, and the support 7 is preferably substantially parallel to the core yarn 1 running in the false twisting area. is necessary. On the other hand, the middle part is formed when the overfeeding of the effect yarn 2 ends, the tension of the effect yarn 2 becomes equal to or higher than the yarn feeding tension of the core yarn 1, and the position of the effect yarn guide 8 moves upward. It is also necessary that the effect yarn guide 8 be attached to the support body 7 in a freely sliding state when forming the path section. As described above, in the present invention, the slab occurrence frequency can be obtained by changing the supply rate of the effect yarn to the core yarn running through the false twisting area. A specific method for overfeeding the effect yarn at random time intervals is, for example, a method of varying the rotational speed of the feed roller 6 as shown in FIG. This method is possible by connecting the shaft of the feed roller to a servo motor and sending random signals to the servo motor. In addition, for example, the second
As shown in the figure, the effect yarn 2 whose tension has been regulated in advance by the tensor 13 is rotated randomly and steadily by the traverse guide 12 by the feed roller 6.
It is also possible to do this by supplying [Effects of the Invention] According to the present invention, the slubbing frequency can be freely changed, and is not limited to frequent slubbing as in the case of yarns according to the conventional method. Furthermore, by appropriately setting the effective yarn tension when forming the path part, it is possible to obtain not only a yarn that has a silky feel like conventional yarns, but also a yarn that has a soft luster. The present invention will be explained below with reference to Examples. [Example] Two filaments of 75 denier 48 polyester long fibers were used as a core yarn and an effect yarn, and the experiments and results shown in the following table were obtained by the method shown in FIGS. 1 and 2.
The machine used was an ST type false twisting machine manufactured by Mitsubishi Heavy Industries, Ltd.
The support of the guide consists of the core yarn running through the false twisting area and the 40
They were placed in parallel at cm intervals. A stainless steel wire with a diameter of 2 mmφ was used as the guide support, and a metal ring weighing 1 g and having an inner diameter of 4 mmφ was used as the effect thread guide, and this metal ring was loosely fitted onto the stainless steel wire. In addition, the results obtained by the conventional method are also described as a comparison with the present invention, and the position of the effective yarn guide in this case is at the midpoint between the core yarn guide 4 and the heater upper guide 5 in FIG. 1, and 40 cm away from the core yarn. False twisting was carried out at a fixed excess supply rate.

【table】

[Table] The measurement point is between the tensor (13) and the traverse guide (12) in Figure 2. As shown in the table, the yarn obtained by the present invention has both the slab length and the length of the path section compared to the conventional yarn. It was more random, and the slab frequency was significantly controlled, making it possible to vary the texture over a wide range of conditions.

[Brief explanation of drawings]

FIG. 1 is a process diagram showing a specific example for implementing the present invention, and FIG. 2 is a process diagram of an example for randomizing oversupply of effect threads. 1... Core thread, 2... Effect thread, 3... Feed roller or magnetic tensor, 4... Core thread guide, 5...
Heater upper guide, 6...Feed roller, 7
...Guide guide, 8...Effect yarn guide, 9...Heater, 10...Spindle, 11...Delivery roller, 12...Traverse guide, 13...Tensor.

Claims (1)

[Claims] 1 The effect of being slidably attached to a support provided approximately parallel to the yarn in the false-twisting region of the yarn being false-twisted, and sliding freely according to the tension of the effect yarn. A method for producing composite false-twisted yarns, characterized in that effect yarns are over-fed at random time intervals through a yarn guide.