JPS6346180B2 - - Google Patents

Description

[Detailed description of the invention]

The present invention relates to a method for producing a novel special composite yarn. In general, there are a wide variety of methods for producing composite yarns for the purpose of design effects, and in the case of spun yarns, slub yarns, net yarns, etc. can be obtained by changing the threads during the spinning process, but complex yarns or It requires a lot of steps, does not allow for diversification in terms of design, and has low productivity in principle. In addition, various methods using pressurized fluid have been proposed for filament yarns in order to increase productivity and obtain new yarn forms, but these methods are also complicated in mechanism because they mainly involve blending and entangling the yarns. However, there is a problem with quality stability, and in many cases it is a single-function machine, which has the disadvantage of not being able to significantly change the yarn form. Furthermore, composite yarns called so-called designed twisted yarns, which are made of spun yarn or filament yarn using a designed yarn twisting machine, are excellent in their versatility, but require complicated mechanisms and techniques, and in principle have extremely low productivity. This serious flaw has not yet been resolved. The present inventors have arrived at the present invention as a result of intensive studies to solve the problems of the conventional method. , Two cylindrical bodies are arranged in series to generate a swirling vortex flow, with a hollow conical body and an annular body facing each other on the internal central axis, and each cylindrical body is brought into a negative pressure state by suction to form the core. The yarn is made to run along the central axis of each cylinder, and the sheath forming yarn is placed at least one point closer to the air inflow hole of each cylinder.
The threads for forming the sheath are fed one by one at a speed higher than the traveling speed of the thread for forming the core, and each thread for forming the sheath is wrapped around the thread for forming the core by the action of a negative pressure swirling vortex at the tip of the hollow cone. The method of manufacturing a special composite yarn is characterized by intertwining the yarn in a twisted state. The present invention will be described in detail below with reference to the drawings.
FIG. 1 is a side view showing an example of an apparatus used in carrying out the present invention, in which a core forming yarn 1 is connected to a swirling vortex generating cylinder 8 connected to a tension adjusting device 4 and a negative pressure source 15. , 11, and runs along the central axis of the swirling vortex generating cylinders 8, 11, while another sheath forming yarn 2 is connected to a tension adjusting device 4' and a feed roller 5. , 5', and the yarn guide 9, and is supplied into the swirling vortex generating cylinder 8 from the air inflow hole 10 provided in the direction of the circumferential surface of the swirling vortex generating cylinder 8. Similarly, another sheath-forming yarn 3 is also connected to an air inlet provided in the direction of the circumferential surface of the swirling vortex generating cylinder 11 via a tension adjusting device 4'', feed rollers 6, 6', and a yarn guide 12. The yarns 2 and 3 for forming the sheath part are supplied into the swirling vortex generating cylinder 11 through the hole 13. 1 is twisted and entangled by the action of a negative pressure swirling vortex flow, passes through the hole 14, becomes a special composite yarn 16, and is turned into a cheese 17 by a winding device.
It is rolled up as. Therefore, the process of forming the special composite yarn 16 described above was performed in a second manner.
To explain in more detail with reference to FIG. 3 and FIG.
3, the core forming yarn is supplied in excess of one or more times, preferably several times or more, and is supplied into the swirling vortex generating cylinders 8, 11. The loop groups 19,2
2 occur consecutively. These loop groups are further formed by annular bodies 18 and 2 provided at the center of the swirling vortex generation cylinders 8 and 11 by the negative pressure swirling vortex action.
At the tip of the hollow conical bodies 20 and 23 above 1, the sheath forming yarn 2 is first attached to the circumferential surface of the core forming yarn 1, and then the sheath forming yarn 3 is continuously twisted in a twisted state. are intertwined to form a special composite yarn 16. At this time, if the swirling vortex generating cylinders 8 and 11 are the same, and the sheath forming yarns 2 and 3 are of the same type and supplied in the same amount, the special composite yarn 16 will be well-balanced with excellent bulk. By using different types of sheath-forming yarns 2 and 3 or by changing their supply amounts, a variety of special composite yarns with a variety of shapes can be obtained. Also, the air inflow holes 1 of the swirling vortex generating cylinders 8 and 11
0 and 13 are provided so as to generate negative pressure swirling vortices in opposite directions, for example, first the sheath forming yarn 2 is entwined with the core forming yarn 1 in a right-handed twisted state by the cylinder 8. After being combined, the sheath forming yarns 3 are intertwined in a left-handed twisted state using the cylinder 11 to produce a slab-like composite yarn as shown in FIG. 4B. According to the present invention configured as described above, since it effectively utilizes the high-speed negative pressure swirling vortex flow caused by suction, it does not require complicated mechanisms and techniques as in the conventional method, and is therefore economical and high cost. It has the advantage of high productivity, can be applied to the manufacture of many types of yarn forms, and has a twisted yarn structure, which has excellent stability of form and quality, and has many industrial effects. Example 1 A special composite yarn was manufactured using the apparatus shown in Fig. 1, in which the air inflow holes 10 and 13 were arranged to generate swirling vortices in the same direction, and the main conditions were set as shown in Table 1. A special composite yarn as shown in Fig. 4A, which is flexible, extremely bulky, and has an excellent pongee-like design effect, was obtained.

【table】

[Table] Example 2 The main conditions were set as shown in Table 2 using the device shown in Fig. 1, in which the air inflow holes 10 and 13 were provided so as to produce swirling vortices in opposite directions as shown in Fig. 4 A and B. When a special composite yarn was manufactured, a special composite yarn as shown in FIG. 4B was obtained which had an excellent slab-like design effect, a solid slab-like portion, and excellent processability.

【table】

【table】 [Brief explanation of drawings]

FIG. 1 is a perspective view showing an example of an apparatus used to carry out the present invention, FIG. 2 is a longitudinal sectional view of the cylindrical bodies 8 and 11 in FIG. 1, and FIG. 3 is a line A-A' in FIG. 2. Line sectional views and FIGS. 4A and 4B are side views showing various examples of composite yarns obtained by the present invention. In FIGS. 1 to 3, 1 is a core forming yarn; 8 and 11 are swirling swirl cylinders, 10 and 13 are air inflow holes, 20 and 23 are hollow conical bodies, and 18 and 21 are annular bodies.

Claims (1)

[Claims] 1. Two cylindrical bodies for generating swirling vortices are arranged in series, each having an air inflow hole in the tangential direction of the circumferential surface, and a hollow conical body and an annular body facing each other on the central axis of the cylindrical body, Each cylindrical body is brought into a negative pressure state by suction, and the thread for forming the core portion is made to run along the central axis of each cylindrical body, and at least one thread for forming the sheath portion is inserted into the core from the air inflow hole of each cylindrical body. The sheath forming threads are fed at a speed higher than the running speed of the sheath forming threads, and each sheath forming thread is twisted around the core forming thread by the action of a negative pressure swirling vortex at the tip of the hollow cone. A method for producing a special composite yarn that is characterized by intertwining.