JPS6017873B2 - Method and device for twisting the striatum - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method and device for twisting filaments, and more specifically, to a pre-twist storage type twisting method and device that can completely eliminate uneven twisting and twisting.

When making a stranded wire S by twisting the strands w, the stranded wire S may be untwisted as shown by S in Fig. 1 or untwisted with the strands protruding in extreme cases as shown by S2. often appears.

This is caused by an imbalance in the tension of each strand and an inconsistency in the twisting rate in which the peripheral wire has a higher twisting rate than the central wire, but in order to eliminate this inconvenience, the applicant has First, we developed a new pre-twisting method in which a pre-twist is applied before the main twist. This conventional method will now be briefly explained with reference to FIG.

It is assumed that the plurality of wires w are separated by the separation plate 2, then put together in the twisting die 21, passed through the pre-twisting device 103, and then wound onto the winding bobbin 44 of the double-burning device 4. This pre-twisting device 103 is, for example, as shown in the figure, a pair of rollers 1038 and 103C are rotatably provided on a frame 103A.
When 3A rotates with the traveling direction of the Hata line being the Fuji line, the wires that are passed around the rollers 103B and 103C are twisted. Now, in this subordinate method, the frame 103A of the pre-twisting device is connected to the downstream two parts as shown by the arrow in the figure.
It is rotated in the same manner as the flyer 41 of the twisted diamond layer 4 at a rotational speed approximately twice the rotational speed n of the parentheses. In this way, the Hata line w is first given the S twist of the fox times immediately after the pre-twisting device 103, and then
When it exits the strand, it is returned n times, and then S-twist is applied n times in the twice-twisting device 4, resulting in the first S-twisted strand being obtained. In this conventional method, the number of burns of the product stranded wire is first given to the strands by the pre-twisting device 103, and tension imbalance due to the difference in twist rate between the center wire and the peripheral wire is avoided. , the twist is attempted to be made uniform at the stage of the twisting operation in which half of the twist is untwisted and re-added. In terms of distance, this is the length that is passed around the rollers 103B and 103C. Whether the strands undergo elastic deformation due to torsion during the pre-twisting stage or whether some of the strands undergo plastic deformation depends on the outer diameter of the strands, the material, the number of twists, etc. However, the history of this elastic or plastic deformation, or the effect of ``twisting'' to borrow a common expression, is of course related to the length of time that this pre-twisting is applied, and if this time is long to some extent. It is better. In other words, the longer the time for applying the twist, the more effective the pre-twisting method is in the conventional method. The present invention has been made in view of this fact, and one embodiment of the present invention will be explained with reference to FIGS. 3 and 4.

A plurality of strands w sent out from a strand feeding device, generally indicated by 1, are separated by a splitting plate 2, then enter a combustion die 21, and then passed through a wire storage type pre-twisting device 3, which will be described later, to a second twisting device. Enter 4. This double twisting device 4 is the same as the conventional one, and if each part is briefly explained, 40
, 40 are a pair of opposing bases, 41 is a flyer rotatably supported from the base 40', 42 is a floating frame rotatably supported inside the flyer 41 relative to this, 43
, 44 are take-up bobbins provided on the floating frame 42.This wire storage type pre-twisting device 3 is the fourth
As shown in the figure, hollow shafts 31 and 32 are rotatably supported on a base 30, and a frame 33 is fixed to the hollow shafts 31 and 32,
A pair of sheave groups 34 and 35 provided on this frame 33
An inlet spindle IJ-36 is rotatably provided at the entrance of the hunting line device so that the groove circumference is in contact with the central axis of the hollow shaft 31, and an outlet is provided at the outlet. A torsion pulley 37 is provided at a similar location.

Note that 21 is a lacquering die provided at the end of the hollow bag 31, and 38 is a drive pulley fixed to the hollow shaft 32.
After the strands w are separated into the separation plate 2,
It passes through the inlet twist pulley 36, passes between the sheave groups 34 and 35 several times, and then passes through the outlet twist pulley 37 and enters the twice-twisting device 4 downstream. As can be seen from this configuration, the wire w is the hollow wisteria 31 of the frame 33.
, 32, it travels between the sheave groups 34 and 35 of the wire storage device while retaining the twist given between the twisting die 21 and the inlet twisting roller 36, and reaches the outlet twisting roller 37. be. That is, in other words, the twist is continuously maintained during the elapsed time of running the wire storage length from the entrance twisting roller 36 to the exit twisting roller 37. Now, in the device of the present invention, if the rotation speed of the frame 33 is Zn in the direction of the illustrated arrow, and the rotation speed of the flyer 41 of the downstream double twisting device 4 is n in the same direction, then
Inside this wire storage type pre-twisting device 3, the wire w has the initial S twist, then enters the twisting device 4 twice and is untwisted by n, and then the twisted wire leaves the flyer 41 and floats. Frame 4
2, n S twists are again applied just before the take-up device 43 on the floating frame 42 to form a product strand, which is then wound onto the take-up bobbin 44. In this invention, since the state in which the initial S twist is given by pre-twisting continues for a long time, the twist rate of the plain twill w is large and the surrounding wire is in a state of high tension, and the The tension imbalance is alleviated and adjusted between the center-centered wires with low tension. Therefore, during the next stage of untwisting n times and adding n times of S twist inside the double twisting device 4, the tension imbalance between each strand of the stranded wire is reduced and adjusted. Uneven twisting and untwisting due to tension imbalance are eliminated, and a well-ordered stranded wire can be obtained.Although not shown, the sheave group of the wire storage device of the pre-twisting device is moved along the traveling direction of the strands. A modification is also possible in which the sheaves are opposed to each other and the central sheave in the sheave group acts as the inlet and outlet twisting rollers.

In this case, the weight of the sheave group and the strands wound thereon are located relatively close to the axis of rotation, which is convenient for high-speed rotation of the pre-twisting device. As described in detail above, this invention (i) gives the number of twists of the finished product strands at the stage of pre-twisting and maintains this state to some extent, so that the tension imbalance between the wires is eliminated and the unevenness of twisting is reduced. , the twist is broken.
Become.

(ii) It is easy to provide a wire storage device within the pre-twisting device, and this has the advantage that the entire twisting device does not become complicated or large.

[Brief explanation of the drawing]

Fig. 1 is a perspective view illustrating uneven twisting and untwisting observed in stranded wires, Fig. 2 is a simplified side sectional view illustrating a conventional pre-twisted stranded wire method, and Fig. 3 is an example of this invention. FIG. 4 is an enlarged side sectional view showing the storage wire type pre-twisting device. 1... Qin wire sending device, 21... Twisting die, 3... Wire storage type pre-twisting device, 4...
...twice twisting device. Figure 1 Figure 2 Figure 3 Figure 4

Claims (1)

[Scope of Claims] 1 (a) A step of pre-twisting the plurality of wires in a twisting die and then pre-twisting the wires to approximately twice the number of final twists;
(b) A step of running the pre-twisted stranded wire for a desired time while retaining the pre-twist; and (c)
A method for twisting a filament body, the method comprising: untwisting approximately half of the pre-twist from the pre-twisted wire, and then applying the same twist again. 2. Twisting of a filament having a wire feeding device 1, a die 21 for twisting together a plurality of wires fed from the wire, and a pre-twisting device 3 and a double twisting device 4 disposed downstream of the die 21. The pre-twisting device includes a frame 33 in which the pre-twisting device is rotationally driven in the same direction as the flyer of the double-twisting device at approximately twice the rotation speed, and an inlet provided in the frame so as to be rotatable around its own axis. It is characterized by being a wire storage type pre-twisting device comprising a twist pulley 36, an outlet twist pulley 37, and a wire storage device provided between both the twist pulleys and consisting of a pair of sheave groups 34 and 35. A device for twisting the striatum.