JP2684391B2 - Braided tube manufacturing method - Google Patents

Description

TECHNICAL FIELD The present invention relates to a method for manufacturing a braided tube, and more specifically, for electrical insulation, wiring, and heat protection of home appliances, industrial equipment, measuring equipment, medical equipment, and the like. TECHNICAL FIELD The present invention relates to a method for producing a braided tube used for applications, mechanical protection, etc. with good productivity by a compact device while preventing deformation and varnish adhesion unevenness.

(Prior Art) Conventional braided tube manufacturing methods include, for example, a braiding process, a rewinding process, a heat cleaning process, and a varnishing / diameter adjusting process. In the braiding process, the braiding sleeve 3 is manufactured by braiding the glass fiber, which is the braiding yarn 2, by the braiding machine 7 shown in FIG. The braiding machine 7 is a stand 8
12 rotatably mounted on the upper rotary plate 9 (12 or more and a multiple of 4 may be used. For example, 32, 40, 48, 64, 96,
...) bobbin 10 (only one is shown in the figure), and the rotation and movement of bobbin 10 causes braided yarn 2 of bobbin 10
Is braided by the push-up guide 7a to manufacture the braided sleeve 3. Then, the braided sleeve 3 includes a guide 11 and a take-up pulley 12.
And it is taken up by the take-up bobbin 14A shown in FIG. 3 (a) through the auxiliary take-up pulley 13 by a predetermined take-up tension, or collected in the basket 14B shown in FIG. 3 (b).

Next, the braided sleeve 3 collected in the take-up bobbin 14A or the basket 14B is rewound on an aluminum bobbin in a rewinding step (not shown), and then transferred to a heat cleaning step, and heated at a temperature of 350 to 400 ° C. Heat treatment is performed in the furnace. In this step, the braided sleeve 3 is cured to provide dimensional stability and remove the sizing agent adhering to the glass fibers 2.

Next, the braided sleeve 3 is dipped in a varnish bath 17 (silicone varnish) in a container 16 below the varnishing machine 15 shown in FIG. It is heated and cured by the upper tower heating furnace 19.

The varnish treatment and the heating / curing treatment are repeated several times in order to strengthen the convergence of the braided sleeve 3 and prevent fraying, and the braided tube 1 is manufactured.

On the other hand, a method has also been proposed in which a braided braided sleeve is pulled upward and continuously subjected to varnishing and drying (Japanese Patent Laid-Open No. 58-7719).

(Problems to be solved by the present invention) However, according to the method for manufacturing a braided tube in which each of the conventional steps is separately performed, the braided sleeve 3 manufactured in the braiding step is wound around the winding bobbin 14A, or Collected in the basket 14B, transported to the next process and stored.

Therefore, the braided sleeve 3 is deformed into an elliptical shape as shown in FIG. 5 (a) due to the tension when the braided sleeve 3 is wound around the winding bobbin 14A and the weight of the upper braided sleeve in the basket 14B. There is a point.

In addition, the braided sleeve 3 has a rewinding step and a heat cleaning step after the braiding step. Due to these steps, the braided sleeve 3 is bent, deformed from a perfect circle, or broken outside as shown in FIG. 5 (b). There is a problem that the diameter becomes unstable. The deformation and bending of these braided sleeves 3 are
Although it is corrected by the diameter making machine 18, it is difficult to correct it until it is sufficiently satisfied.

Furthermore, the manufacture of braided tubes, as described above,
Since it is composed of many processes, it is difficult to shorten the delivery time, the number of products in process in each process increases, inventory management becomes complicated, and the transportation cost between each process also increases.

On the other hand, in the continuous method constructed in JP-A-58-7719. Since the varnishing process and the drying process are performed while pulling up the braided sleeve upward, the equipment becomes tall and long, and a tall building is required.Therefore, a new factory must be constructed, and the varnishing process must be performed. There is a problem that the fluctuation of tension during the treatment and the drying treatment is large, and the amount of varnish attached and the shape of the tube become non-uniform.

Therefore, it is an object of the present invention to provide a method for producing a braided tube which is free from deformation and varnish adhesion unevenness and can be produced with good productivity by a compact device.

(Means for Solving the Invention) A method for manufacturing a braided tube according to the present invention is to produce a braided sleeve braided with a braided yarn, allow the braided sleeve to run downward by a feed pulley, and continuously form a U-shape. It is dipped in the varnish liquid stored in the pipe-shaped varnish treatment tank and varnished, the varnished braided sleeve is pulled up, and continuously heated and cured as it is,
By the take-out pulley rotating in synchronization with the feed pulley,
It is characterized by taking it out.

Examples of the braided yarns include glass fibers, inorganic fibers such as carbon fibers, and organic fibers such as polyester fibers.

Further, the braided sleeve may be a doubled or triple or more braided sleeve obtained by further braiding the braided sleeve.

Examples of the varnish liquid include silicone varnish (including so-called silicone rubber varnish), alkyd varnish, viscous varnish and the like. Further, the varnish liquid may be, for example, one obtained by appropriately diluting the varnish with a bath agent such as naphtha-based xylene.

The amount of varnish attached to the braided sleeve and the degree of penetration of the varnish can be appropriately changed by adjusting the immersion time of the braided sleeve in the varnish bath, the varnish viscosity, and the like.

(Operation) In the method for manufacturing a braided tube according to the present invention, after braiding the braided sleeve, the braided sleeve is continuously subjected to the varnish treatment and the heating / curing treatment without being wound or accumulated. Since the conventional braided yarn rewinding process, heat cleaning process and diameter-forming process described below are not required, the process from braiding of the braided yarn to varnish treatment and heating / curing can be performed in one continuous process, and the braided sleeve between conventional processes. It is possible to prevent breakage, deformation, bending, etc. that occur during storage of the. Furthermore, by making multiple processes into one process, work in process can be reduced, transportation cost can be reduced, inventory management can be simplified, and productivity can be significantly improved.

Furthermore, since the braided sleeve is sent downwards and varnished, it is pulled up and heated and hardened, so the height of the equipment can be kept low, and it can be manufactured in the existing building. Is possible, and there is no need to build a new factory.

In addition, the feed pulley and take-out pulley are rotated synchronously, and the braided sleeve is gently turned in the U-shaped pipe varnish treatment tank, so varnish treatment is performed under constant tension without bending or ironing. , Can be heated and cured, and the sleeve may be crushed and deformed,
It is possible to obtain a braided sleeve having a uniform shape and a uniform amount of varnish without causing unevenness in the amount of varnish applied.

(Example) Hereinafter, an example of the present invention will be described with reference to the drawings.

FIG. 1 is a schematic view showing an embodiment of an apparatus for carrying out the method for manufacturing a braided tube according to the present invention.

In FIG. 1, reference numeral 31 is a braided tube manufacturing apparatus, and the braided tube manufacturing apparatus 31 braids a glass fiber 32 which is a braided yarn to form a braided sleeve 33.
And a feeding pulley 37 for feeding the braided sleeve 33 into a varnish processing tank 36 described later at a predetermined speed, and a U-shaped pipe shape having a substantially U-shaped pipe for accommodating a silicone varnish 38 which is a varnish liquid in the pipe. A varnish processing tank 36 and a heating furnace 40 for heating and curing the varnished braided sleeve 33A to a predetermined temperature are provided.

In the navy blue machine 35, twelve bobbins 46 wound with the braiding thread 32 rotate and move on the rotating plate, and the braiding thread 32 can be braided via the push-up guide 47. The tying machine 35 may be the conventional one shown in FIG.

Reference numeral 41 denotes a take-out pulley. The take-out pulley 41 and the feed-in pulley 37 are adjusted in rotation at substantially the same time, and a substantially constant tension is given to the braided sleeve 33. 42 is a winding roll, and the winding roll 42 finally winds up the braided tube 21 manufactured by the braided tube manufacturing apparatus 31. 43 and 44 are guide pulleys.

The braided tube manufacturing device 31 has a U-shaped pipe-shaped varnish treatment tank 36 and a heating furnace 40 between a feed pulley 37 and a take-out pulley 41 that rotate in synchronization, and a braided sleeve braided by a braiding machine 35. 33 is continuously immersed as it is in a varnish treatment tank 36 under a constant tension, and heated and hardened in a heating furnace 40. That is, the braided tube manufacturing apparatus 31 is capable of performing multiple processes including a conventional braiding process, rewinding process, heat cleaning process, varnishing / warping process and heating / curing process in one process.

In order to carry out the method for manufacturing a braided tube according to the present invention with the braided tube manufacturing apparatus 31 shown in FIG.
Braiding the glass fiber, which is the braiding thread 32, with the navy blue machine 35,
A braided sleeve 33 having a constant diameter is created. And
The braided sleeve 33 is continuously guided by the guide pulley 43.
Of the U-shaped pipe-shaped varnish treatment tank 36 while being kept at a predetermined tension with the take-out pulley 41 which is guided downward by the feed pulley 37 and rotates in synchronization with the take-up pulley 37.
Is dipped in the silicone varnish 38 of FIG. While the braided sleeve 33 is dipped in the silicone varnish 38 of the varnish treatment tank 36 and passes from the inlet 36a to the outlet 36b, the braided sleeve 33 is gently turned upward while the silicone varnish
38 is attached, and a braided sleeve 33A is formed from the outside of the braided sleeve 33 through the mesh to the inside of the braided sleeve 33. The varnished coated braided sleeve 33A is pulled up and continuously heated in the heating furnace 40 to harden the silicone varnish 38, and the braided tube 21.
Is manufactured. The braided tube 21 is guided by the guide pulley 44, taken out by the take-out pulley 41, and taken up by the take-up roll.
It is rolled up by 42.

In the method for manufacturing a braided tube according to the present invention, the braided tube 21 is manufactured from multiple steps to one step,
The braided sleeve 33 braided by 35 is directly and continuously immersed in the silicone varnish 38 of the varnish treatment tank 36 as it is, and the feed pulley 37 and the take-out pulley 37 are used.
Since it is adjusted to a predetermined speed by 41 and manufactured under a predetermined tension, the winding bobbin 14A or the basket 14B can be manufactured in the conventional manner.
Therefore, it is possible to prevent the braided sleeve 33 from being broken or deformed due to deformation or rewinding due to weight during storage.

Also, since it is one process from multiple processes, the delivery time at the time of production can be shortened, there is no work-in-process between each process, transportation costs between processes are unnecessary, and inventory management is easy,
Production cost can be reduced and productivity can be greatly improved.

Further, the braided sleeve 33 is made to run downward by the feed pulley 37, and after the varnish treatment, the braided sleeve 33 is pulled up and heated and cured, so that the height of the device can be kept low.

Further, the feed pulley 37 and the take-out pulley 41 are rotated synchronously, and the braided sleeve 33 is gently turned in the U-shaped pipe varnish treatment tank 36, so that the braided sleeve 33 is bent or ironed. Without this, varnish treatment and heating / curing treatment can be performed under constant tension. By forming the varnish treatment tank 36 into a pipe shape, gelation of the varnish liquid can be prevented.

(Effects) As described above, according to the present invention, there is no breakage or deformation during manufacturing of the braided tube, the stability of the diameter is significantly improved, and the delivery time during production can be shortened. Decrease,
Production cost can be reduced and productivity can be significantly improved.

Moreover, the height of the manufacturing equipment can be kept low, it can be made compact, it can be manufactured in the existing building, and there is no need for new construction, so it is extremely economical, and even during varnish processing. Since the varnishing treatment and the heating / curing treatment can be performed under a constant tension without bending or ironing the braided sleeve, a braided tube with a uniform shape and varnish adhesion amount can be obtained.

[Brief description of the drawings]

FIG. 1 is a schematic view showing an embodiment of an apparatus for carrying out the method for manufacturing a braided tube according to the present invention. 2nd-4th
FIG. 1 is a view showing an apparatus for carrying out a conventional method for manufacturing a braided tube, FIG. 2 is a partial perspective view of the braiding machine, and FIGS. Schematic showing,
FIG. 4 is a schematic view showing the varnish processing machine. FIG. 5 (a) is a partial perspective view showing the deformed state of the conventional braided tube, and FIG. 5 (b) is a partial front view showing the bent state of the conventional braided tube. 21 …… Braided tube 31 …… Braided tube manufacturing equipment 32 …… Braided yarn (glass fiber) 33 …… Braided sleeve 36 …… U-shaped pipe-shaped varnish treatment tank 37 …… Sending pulley 38 …… Varnish liquid (silicone varnish) ) 40 …… Heating furnace 41 …… Take-out pulley

Claims (1)

(57) [Claims] 1. A braided sleeve braided with braided yarn is prepared,
Run the braided sleeve downward with a feed pulley,
As it is, it is continuously immersed in the varnish solution stored in the U-shaped pipe varnish treatment tank for varnish treatment, and the braided sleeve treated with varnish is pulled up and continuously heated and cured as it is. A method for manufacturing a braided tube, wherein the take-out pulley is taken out by a take-out pulley that rotates in synchronization with the feed pulley.