JPH02106826A - Manufacture of braided tube - Google Patents

Abstract

PURPOSE:To prevent the folding, deformation and inflection of the present braided tube in the storage or the like by forming a braided sleeve and successively bringing the same in varnishing and heating/hardening processes as it is, without temporarily winding or accumulation thereof. CONSTITUTION:Glass fiber as braided yarn 32, is braided into a braided sleeve 33 having a specific diameter. The braided sleeve 23 is successively guided around a guide pulley 43 and then adjusted in a specific speed by a delivery pulley 37 and take-out pulley 41, followed by being immersed in a silicon varnish 38 of a varnishing tank 33a under a specific tension. The braided sleeve 33a coated with the varnish is successively subjected to a heating/hardening process for hardening the silicon varnish 38 in a heating furnace 40. The resultant braided tube 21 is guided around a guide pulley 44 and taken out by means of a take-out pulley 41 to be wound around a winding roll 42. Thus, the folding or deformation in manufacture of the braided tube is eliminated and the stability of the diameter thereof can be improved.

Description

Detailed Description of the Invention (Industrial Application Field) The present invention relates to a method for manufacturing a braided tube, and more specifically, for electrical insulation, wiring, and thermal protection of home appliances, industrial equipment, measuring equipment, medical equipment, etc. The present invention relates to a method for manufacturing braided tubes used for storage, mechanical storage, etc. with good productivity while preventing deformation.

(Prior art) As a conventional method for manufacturing a braided tube, for example,
．． There is one process, a rewinding process, a heat cleaning process, and a varnishing/diameter adjustment process.

In the string-making process, a string-making machine 7 shown in FIG. 2 braids glass fibers, which are the braided threads 2, to produce a braided sleeve 3.

The lace making machine 7 has 12 cords rotatably attached to a rotary plate 9 on a pedestal 8 (the cords may be a multiple of 4 or more. For example,
32, 40, 48, 64, 96, ...) (only one is shown in the figure), and the braided thread 2 of the bobbin 10 is , II, [1] with the push-up guide 7a to produce the braided sleeve 3. Then, the braided sleeve 3 passes through the guide 11, the take-up pulley 12, and the auxiliary take-up pulley 13, and is wound onto the take-up bobbin 14A shown in FIG. ) are collected in the basket 14m shown in ).

Next, the braided sleeve 3 collected on the winding bobbin 146 or the basket 14B is rewound onto an aluminum bobbin in a rewinder process (not shown), and then transferred to a heat cleaning process where it is heated at a temperature of 350 to 400°C. Heat treated in a heating furnace. In this step, the braided sleeve 3 is cured to provide dimensional stability and to remove the sizing agent adhering to the glass fibers 2.

Next, the braided sleeve 3 is immersed in a varnish bath 17 (silicone varnish) in a container 16 at the bottom of the varnish treatment machine 15 shown in FIG. , is heated and hardened by the upper tower heating furnace 19. The varnish treatment and heating/hardening treatment are usually repeated several times to strengthen the convergence of the braided sleeve 3 and prevent fraying, and the braided tube 1 is manufactured.

(Problems to be Solved by the Invention) However, according to this conventional method for manufacturing a braided tube, the braided sleeve 3 manufactured in the stringing process is wound around the winding bobbin 14A or collected in the basket 1411. It is transported to the next process and stored.

For this reason, the braided sleeve 3 is attached to the winding hobbin 14. There is a problem in that the wire is deformed into an elliptical shape as shown in FIG. 5(a) due to the tension when winding it up and the weight of the upper braided sleeve inside the basket 14B.

Furthermore, the braided sleeve 3 undergoes a winding process and a heat cleaning process after the stringing process, and these processes may cause the braided sleeve 3 to break or deform from a perfect circle, as shown in FIG. 5(b). There is a problem that the outer diameter becomes unstable. The deformation and bending of these braided sleeves 3 are as follows:
Although the diameter adjusting machine 18 is used for correction, it is difficult to make the correction sufficiently satisfactory.

Furthermore, as the production of braided tubes consists of many processes as mentioned above, it is difficult to shorten delivery times, the number of products in progress in each process increases, inventory management becomes complicated, and each process There is also the problem of increased transportation costs.

Therefore, the present invention eliminates deformation of the braided tube, significantly improves diameter stability, shortens delivery time during production, reduces work-in-progress, and reduces production costs, significantly improving productivity. The purpose of the present invention is to provide a method for manufacturing a braided tube.

(Means for Solving the Problems) A method for manufacturing a braided tube according to the present invention involves creating a braided sleeve braided with braided yarn, and continuously varnishing the braided sleeve with a varnish solution. It is characterized in that the braided sleeve is further heated and hardened continuously as it is. Further, the varnish treatment is preferably carried out by immersion in a varnish solution stored in a substantially U-shaped pipe.

Furthermore, it is preferable that the varnish treatment and the heating/hardening treatment be carried out under a constant tension between an inlet pulley and a take-out pulley that rotate in sync with each other.

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

Further, the braided sleeve may be a double or triple or more braided sleeve that further includes a braided sleeve.

In addition, as the varnish liquid, silicone varnish (including so-called silicone comb varnish), Al-1-
Examples include soto varnish and viscous varnish. Further, the varnish liquid may be, for example, a varnish appropriately diluted with a solvent such as naphtha-based xylene.

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

(Function) In the method for producing a braided tube according to the present invention, after the braided sleeve is braided, it is continuously subjected to varnish treatment and heating/hardening treatment without being rolled up or piled up. Therefore, the conventional rewinding process of the braided yarn, heat cleaning process, and diameter adjusting process described below are no longer necessary, and the process from braiding the braided yarn to varnish treatment, heating,
The curing process can be carried out in one continuous process, and the bending, deformation, bending, etc. that occur during storage of the braided sleeve between conventional processes can be prevented. Furthermore, by combining multiple processes into one process, it is possible to reduce work-in-progress, reduce transportation costs, and simplify inventory management, greatly improving productivity.

(Example) Embodiments of the present invention will be described below based on the drawings.

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

In FIG. 1, 31 is a braided tube manufacturing device;
The braided tube manufacturing device 31 includes a string making machine 35 that creates a braided sleeve 33 by braiding glass fibers 32 that are braided threads.
, a feeding boob IJ37 that feeds the braided sleeve 33 into a varnish treatment tank 36 (to be described later) at a predetermined speed, and a silicone varnish 3 which is a varnish liquid inside the U-shaped pipe.
8, and a heating furnace 40 that heats and hardens the varnished braided sleeve 33A to a predetermined temperature.

The lace making machine 35 has 12 bobbins 46 wound with the braided yarn 32.
rotates and moves on the rotary plate, and the braided thread 32 can be braided via the push-up guide 47. Note that the lace making machine 35 may be of the conventional type shown in FIG.

Reference numeral 41 denotes a take-out pulley, and the rotations of the take-out pulley 41 and the feed pulley 37 are adjusted substantially synchronously so as to apply a substantially constant tension 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 includes a varnish treatment tank 36 between a feed pulley 37 and a take-out pulley 41 that rotate in synchronization.
The braided sleeve 33 braided by the string making machine 35 is continuously immersed in the varnish treatment tank 36 under constant tension, and is heated and hardened in the heating furnace 40. That is, the braided tube manufacturing apparatus 31 can perform multiple steps in one step, including the conventional stringing process, winding process, heat cleaning process, varnishing/warping process, and heating/hardening process.

In order to carry out the method for manufacturing a braided tube according to the present invention using the braided tube manufacturing apparatus 31 shown in FIG. A sleeve 33 is created. Then, the braided sleeve 33 is directly and continuously guided as it is to the guide boob IJ43, and is adjusted to a predetermined speed by the feed pulley 37 and the take-out boob IJ41, and is heated under a predetermined tension. It is immersed in varnish 38 and treated with varnish. Braided sleeve 33
The silicone varnish 38 is immersed in the silicone varnish 38 of the varnish treatment tank 36 and adheres while passing from the inlet 36a to the outlet 3Gb, and penetrates from the outside of the braided sleeve 33 through the mesh to the inside of the braided sleeve 33. Then, a covered braided sleeve 33A is created. The varnished coated braided sleeve 33A is then continuously heated in the heating furnace 4.
0, the silicone varnish 38 is heated and cured, and the braided tube 21 is manufactured by heating and curing treatment. The braided tube 21 is guided by a guide boot 4, taken out by a take-out pulley 41, and wound onto a take-up roll 42.

In the method for manufacturing a braided tube according to the present invention, the production of the braided tube 21 is reduced from multiple steps to one step, and the braided sleeve 33 braided by the lace-making machine 35 is processed as it is.
Silicone varnish 3 in varnish treatment tank 36 directly and continuously
The winding bobbin 14 is immersed in the winding bobbin 14, adjusted to a predetermined speed by the infeed bobbin IJ37 and the take-out bobbin IJ1, and manufactured under a predetermined tension.
It is possible to prevent the braided sleeve 33 from being bent or deformed due to deformation due to the weight of A or the basket 14a during storage or from being rolled back.

In addition, since many processes are combined into one process, delivery times during production can be shortened, there is no work in progress between each process, there is no need for transportation costs between processes, and inventory management is also easier. Costs can be reduced and productivity can be greatly improved.

In addition, in the above-mentioned embodiment, as shown in FIG.
Although a case has been described in which the braided tube is braided by the string making machine 35, continuously treated with varnish as it is in the varnish treatment tank 36, and heated and hardened in the heating furnace 40, the present invention is not limited to this embodiment. After the braided sleeve is braided using the lace making machine shown in FIG. 2, it may be continuously treated with varnish in a conventional varnish bath 17 shown in FIG. 4, and then heated and hardened in a tower heating furnace 19. At this time, it goes without saying that the immersion time in the festival bath, the festival viscosity, the winding speed of the braided sleeve, etc. are adjusted.

(Effects) As explained above, according to the present invention, there is no bending or deformation during production of the braided tube, the stability of the diameter can be greatly improved, the delivery time during production can be shortened, and 111 products can be manufactured. The production cost can be reduced by 1 or more, and productivity can be greatly improved.

[Brief explanation of the drawing]

FIG. 1 is a schematic diagram showing an embodiment of an apparatus for carrying out the method for manufacturing a braided tube according to the present invention. 2nd to 4th
The figure shows an apparatus for carrying out a conventional method for manufacturing a braided tube. Fig. 2 is a partial perspective view of the lace-making machine, and Fig. 3 (a) and (b) respectively show the winding state. FIG. 4 is a schematic diagram showing the festival processing machine. Fifth
FIG. 5(a) is a partial perspective view showing a conventional braided tube in a deformed state, and FIG. 5(b) is a partial front view showing a conventional braided tube in a bent state. 21... Braided tube, 31... Braided tube manufacturing device, 32...
... Braided thread (glass fiber), 33 ... Braided sleeve, 37 ... Feeding pulley, 3B ... Face liquid (silicone varnish), 41
...Take-out pulley.

Claims (1)

[Claims] A braided tube characterized in that a braided sleeve is prepared by braiding with braided yarn, the braided sleeve is continuously varnished with a varnish liquid, and the varnished braided sleeve is further heated and hardened continuously as it is. manufacturing method.