KR102615497B1 - Manufacturing system and method for tension core and tension core - Google Patents

Abstract

The present invention provides a tensile core manufacturing system, manufacturing method, and tensile core. One aspect of the tensile core manufacturing system according to an embodiment of the present invention includes a fiber supply unit supplying a plurality of first and second fibers; an impregnation tank in which the first and second fibers supplied by the fiber supply unit pass through and are impregnated with a resin contained therein; a first forming guide that guides the first fibers that have passed through the impregnation tank to focus on each other and guides the second fibers that have passed through the impregnation tank to pass through; a first curing mold that cures the resin by heating the first fibers impregnated with resin so that an inner core is formed by the first fibers focused by the first forming guide; a second forming guide that guides the second fibers that have passed through the first forming guide to be mutually focused and surround the inner core; And a second curing mold for curing the resin by heating the inner core and the second fiber impregnated with the resin so that an outer core surrounding the inner core is formed by the second fiber focused by the second forming guide. ; Includes.

Description

Tensile core manufacturing system, manufacturing method and tensile core {MANUFACTURING SYSTEM AND METHOD FOR TENSION CORE AND TENSION CORE}

The present invention relates to tensile core manufacturing systems, manufacturing methods, and tensile cores.

Tensile cores are used as load-bearing elements in power transmission lines, etc., and substantially bear the tensile force applied to the power transmission lines. In general, the tensile core is made of carbon fiber and glass fiber with high tensile strength, and is manufactured by impregnating a plurality of carbon fibers or glass fibers into a resin and then curing the resin.

Prior Patent 1 (Korean Patent No. 1046215, name: Aluminum conductor composite core reinforcement cable and method of manufacturing the same) and Prior Patent 2 (Korean Patent No. 1696650) propose various systems and methods for manufacturing tensile cores. It is done. Referring to prior patents 1 and 2, in the conventional tensile core, two fibers selected from resin-impregnated carbon fiber and glass fiber form a core layer, that is, an inner core layer and an outer core layer, respectively, and the resin is heated. As it hardens, a tensile core is manufactured.

However, the tensile core manufacturing system, manufacturing method, and tensile core according to the prior art have the following problems.

First, conventionally, the resin is impregnated into the fiber as the fiber passes through an impregnation tank containing the resin. However, the amount of resin impregnated into the fiber may vary depending on the viscosity of the resin. In other words, if the viscosity of the resin is excessively high, more than an appropriate amount of resin is impregnated into the fiber, which may ultimately cause the diameter of the tensile core to exceed the designed value. Conversely, if the viscosity of the resin is excessively low, less than an appropriate amount of resin is impregnated into the fiber, which may lower the bonding strength of the resins and thus lower the tensile strength of the tensile core. However, in the past, the technology for controlling the viscosity of the resin has not been disclosed.

Additionally, the fibers forming the two core layers are impregnated with resin in a separate impregnation tank. That is, after the carbon fibers forming the inner core layer are impregnated with the resin, the glass fibers forming the outer core layer are separately impregnated with the resin to form the outer core layer. Accordingly, conventionally, devices for separately impregnating carbon fibers and glass fibers into resin must be provided, making the configuration of a system for manufacturing a tensile core complex, which increases equipment costs.

Republic of Korea Patent No. 1046215 (Name: Aluminum conductor composite core reinforcement cable and manufacturing method thereof) Republic of Korea Patent No. 1696650 (Name: Composite core for high-voltage wire and manufacturing method thereof)

The present invention is intended to solve the problems caused by the prior art as described above. The purpose of the present invention is to provide a tensile core manufacturing system, manufacturing method, and tensile core configured to allow an appropriate amount of resin to be impregnated into the fiber. .

Another object of the present invention is to provide a tensile core manufacturing system, manufacturing method and tensile core configured to enable manufacturing in a simpler configuration.

One aspect of the tensile core manufacturing system according to an embodiment of the present invention for achieving the above-described object includes a fiber supply unit supplying a plurality of first and second fibers; an impregnation tank in which the first and second fibers supplied by the fiber supply unit pass through and are impregnated with a resin contained therein; a first forming guide that guides the first fibers that have passed through the impregnation tank to focus on each other and guides the second fibers that have passed through the impregnation tank to pass through; a first curing mold for curing the resin by pultruding and heating the first fibers impregnated with resin so that an inner core is formed by the first fibers focused by the first forming guide; a second forming guide that guides the second fibers that have passed through the first forming guide to be mutually focused and surround the inner core; And an agent for curing the resin by pultruding and heating the inner core and the second fiber impregnated with the resin so that an outer core surrounding the inner core is formed by the second fiber focused by the second forming guide. 2-curing mold; Includes.

In one aspect of the embodiment of the present invention, the impregnation tank includes: a first impregnation unit through which the first fiber is impregnated with a resin while passing through it; and a second impregnation part where the second fiber is impregnated with resin as it passes through it. Includes.

In one aspect of the embodiment of the present invention, after the first fiber is introduced into the first impregnation part, the second fiber is introduced into the second impregnation part, and the first fiber is pulled out from the first impregnation part. Then, the second fiber is pulled out from the second impregnated portion.

One aspect of the embodiment of the present invention further includes a temperature maintenance unit that maintains the temperature of the resin contained in the impregnation tank at a preset temperature.

In one aspect of the embodiment of the present invention, the temperature maintenance unit includes a first temperature maintenance unit that maintains the temperature of the first impregnation unit at a preset first temperature; and a second temperature maintaining unit that maintains the temperature of the second impregnation unit at a preset second temperature lower than the first temperature. Includes.

One aspect of the tensile core manufacturing method according to an embodiment of the present invention includes a fiber supply step in which a plurality of first and second fibers are supplied by a fiber supply unit; A resin impregnation step in which the first and second fibers are impregnated with a resin while passing through an impregnation tank containing a resin; An inner core forming step in which the first fibers are mutually focused while passing through the first forming guide, and then are drawn and heated together with a resin impregnated therethrough while passing through a first curing mold, thereby curing the resin to form an inner core; The second fibers are mutually focused while passing through the second forming guide, surround the inner core, and then pass through the second curing mold and are drawn and heated together with the resin impregnated thereto, thereby curing the resin to form an outer core. Outer core forming step; Includes.

In one embodiment of the present invention, in the impregnation step, after the first fiber is introduced into the impregnation tank, the second fiber is introduced into the impregnation tank, and after the first fiber is withdrawn from the impregnation tank, the second fiber is introduced into the impregnation tank. 2Fibers are withdrawn from the impregnation bath.

In one embodiment of the present invention, in the impregnation step, the temperature of the resin contained in the impregnation tank is maintained in a preset temperature range by a temperature maintenance unit.

In one aspect of an embodiment of the present invention, in the impregnation step, the temperature of the first impregnating part is impregnated with resin as the second fiber passes by the temperature maintaining part compared to the temperature of the first impregnating part where the resin is impregnated as the first fiber passes. 2. The temperature of the impregnated area is maintained low.

One aspect of the tensile core according to an embodiment of the present invention includes an inner core formed by a plurality of first fibers; and an outer core formed by a plurality of second fibers arranged to surround the inner core. A resin is impregnated into the first and second fibers as the first and second fibers pass through one impregnation tank containing the resin, and the resin impregnated into the first and second fibers is cured, thereby curing the first and second fibers. An inner core and an outer core are formed.

In one embodiment of the present invention, the resin impregnated in the first fiber is cured to form the inner core, and then the resin impregnated in the second fiber is cured to form the outer core to surround the inner core.

According to the tensile core manufacturing system and method according to an embodiment of the present invention, and the tensile core manufactured thereby, the following effects can be expected.

First, in an embodiment of the present invention, the temperature of the resin contained in the impregnation tank is adjusted so that an appropriate amount can be impregnated into the fiber. In particular, in this embodiment, the first and second fibers are impregnated with the resin so that the viscosity of the resin is different considering the time required for the first and second fibers to be introduced into the first and second curing molds. The temperature of the second impregnation section is adjusted differently. Therefore, according to an embodiment of the present invention, not only can the fiber forming the tensile core be impregnated with an appropriate amount of resin, but also the amount of resin impregnated into the first and second fibers can be appropriately adjusted in consideration of the actual manufacturing process. It becomes possible.

Additionally, in an embodiment of the present invention, the first and second resins are each impregnated with the resin while passing through one impregnation tank. In particular, in an embodiment of the present invention, the amount of resin detached from the first and second fibers is different depending on the difference in distance between the first and second curing molds and the impregnation tank that cures the first and second fibers, respectively. In order to correct the point, the time for the first and second fibers to pass through the first and second impregnation parts is controlled differently. Therefore, according to an embodiment of the present invention, the amount of resin impregnated into the first and second fibers can be adjusted to a range suitable for the manufacturing process.

1 is a longitudinal cross-sectional view showing a tensile core according to an embodiment of the present invention.
Figure 2 is a schematic configuration diagram of a tensile core manufacturing system according to an embodiment of the present invention.
Figure 3 is a flow chart showing a tensile core manufacturing method according to an embodiment of the present invention.

Hereinafter, the tensile core according to an embodiment of the present invention will be described in more detail with reference to the attached drawings.

1 is a longitudinal cross-sectional view showing a tensile core according to an embodiment of the present invention.

Referring to FIG. 1, the tensile core 10 according to this embodiment includes an inner core 11 and an outer core 13. The inner core 11 is formed by a plurality of first fibers 11F, and the outer core 13 is formed by a plurality of second fibers 13F arranged to surround the inner core 11. is formed Substantially, the inner core 11 and the outer core 13 are formed by curing the resin impregnated in the first and second fibers 11F and 13F. Carbon fiber and glass fiber may be used as the first and second fibers 11F and 13F, respectively.

In this embodiment, the first and second fibers 11F and 13F are impregnated with the resin while passing through one impregnation tank 200 containing the resin. . In other words, in this embodiment, the resin hardened to form the inner core 11 and the outer core 13 is contained in one impregnation tank 200, and the first and second fibers 11F As the (13F) passes through the impregnation tank (200), the first and second fibers (11F) (13F) are impregnated with resin.

In addition, in this embodiment, the resin impregnated in the first fiber 11F is cured to form the inner core 11, and then the resin impregnated in the second fiber 13F is cured to form the inner core 11. The outer core 13 is formed to surround . In other words, in this embodiment, the inner core 11 is formed by the first fiber 11F and then the outer core 13 is formed by the second fiber 13F.

Hereinafter, the tensile core manufacturing system according to an embodiment of the present invention will be described in more detail with reference to the attached drawings.

Figure 2 is a schematic configuration diagram of a tensile core manufacturing system according to an embodiment of the present invention.

Referring to FIG. 2, the tensile core manufacturing system 1 according to this embodiment is for manufacturing a tensile core 10 including an inner core 11 and an outer core 13, and includes a fiber supply unit 100. , an impregnation tank 200, a first forming guide 300, a first curing mold 400, a second forming guide 500, and a second curing mold 600.

More specifically, the fiber supply unit 100 supplies the plurality of first and second fibers 11F and 13F. For example, the fiber supply unit 100 may supply the first and second fibers 11F and 13F, which are unwound while wound on a reel or the like, in the form of yarn. As described above, the first fiber 11F may be carbon fiber, and the second fiber 13F may be glass fiber.

Substantially, in the fiber supply unit 100, a plurality of first and second fiber supply holes through which the first and second fibers (11F) (13F) in the form of one or more yarns are supplied while passing may be formed. . At this time, the first and second fiber supply holes may be arranged on the fiber supply unit 100 in such a way that the second fiber supply hole surrounds the first fiber supply hole.

Next, the impregnation tank 200 is an impregnation area where the first and second fibers 11F and 13F supplied by the fiber supply unit 100 pass through and are impregnated with the resin contained therein. A plurality of first and second inlet holes and first and second outlet holes through which the first and second fibers 11F and 13F are introduced and withdrawn are formed on both sides of the impregnation tank 200. The resin contained in the impregnation tank 200 may be a thermosetting resin, for example, an epoxy resin, an amino resin, or a polyester resin.

The impregnation tank 200 includes first and second impregnation parts 210 and 220. The first impregnation part 210 is a place where the resin is impregnated as the first fiber 11F passes through the first inlet hole and the first outlet hole, and the second impregnation part 220 is the part where the resin is impregnated. This is where the resin is impregnated as the second fiber (13F) passes through the second inlet hole and the second outlet hole.

In this embodiment, after the first fiber 11F is introduced into the first impregnated part 210, the second fiber 13F is introduced into the second impregnated part 220, and the first fiber ( After 11F) is pulled out from the first impregnated portion 210, the second fiber 13F is pulled out from the second impregnated portion 220. As will be described later, considering that the second fiber 13F is hardened after the first fiber 11F is hardened, the first fiber 11F is relatively larger than the first impregnated portion 210. ) and the time required for the second fiber 13F to be drawn into the first curing mold 400 after being pulled out from the second impregnated portion 220 and then drawn into the second curing mold 600. This is to minimize the difference in time required to complete the process. In other words, the first and second fibers 11F and 13F drawn out of the impregnation tank 200 minimize the difference in the time required for the resin impregnated to harden, so that the resin hardens. Until then, in the process of moving the first and second fibers 11F and 13F, the amount of resin detached from the second fiber 13F was excessive compared to the amount of resin detached from the first fiber 11F. This is to prevent it from increasing.

And the first forming guide 300 guides the first and second fibers 11F and 13F that have passed through the impregnation tank 200. In particular, the first forming guide 300 guides the first fibers 11F to focus each other. In other words, the first fibers 11F are focused on each other while passing through the first forming guide 300, and the second fibers 13F are focused on each other while passing through the first forming guide 300. It is positioned spaced apart from the first fiber (11F).

The first curing mold 400 pultrudes and heats the first fiber 11F focused by the first forming guide 300, that is, the first fiber 11F impregnated with resin, to form the first fiber 11F. 1. The resin impregnated in the fiber (11F) is cured. Then, the resin impregnated in the first fibers 11F is cured by heating by the first curing mold 400, thereby forming the inner core 11 by the focused first fibers 11F.

Meanwhile, the second forming guide 500 guides the second fibers 13F that have passed through the first forming guide 300 to be mutually focused. At this time, the second fibers 13F are mutually focused while passing through the second forming guide 500 and are guided to surround the inner core 11.

Finally, the second curing mold 600 pultrudes and heats the second fiber 13F focused by the second forming guide 500, that is, the resin-impregnated second fiber 13F. Thus, the resin impregnated in the second fiber 13F is cured. Accordingly, the outer core 13 surrounding the inner core 11 is formed by the second fiber 13F.

The tensile core manufacturing system 1 according to this embodiment further includes a temperature maintenance unit 700. The temperature maintenance unit 700 serves to maintain the temperature of the resin contained in the impregnation tank 200 at a preset temperature. In particular, the temperature maintaining unit 700 includes first and second temperature maintaining units 710 and 720.

The first temperature maintenance unit 710 maintains the temperature of the first impregnation unit 210 at a preset first temperature. And the second temperature maintenance unit 720 maintains the temperature of the second impregnation unit 220 at a preset second temperature. In this embodiment, the second temperature is set to a relatively lower temperature than the first temperature.

As described above, this is the time difference required for the first and second fibers 11F and 13F to be withdrawn from the impregnation tank 200 and introduced into the first and second curing molds 400 and 600. In consideration of this, this is to ensure that a relatively large amount of resin exists in the second fiber (13F) compared to the first fiber (11F). In other words, the temperature of the resin contained in the second impregnation unit 220 by the first and second temperature maintaining units 710 and 720 is relative to that of the resin contained in the first impregnation unit 210. By being maintained low, the viscosity of the resin contained in the second impregnation part 220 is maintained relatively high compared to the viscosity of the resin contained in the first impregnation part 210. Therefore, by impregnating the second fiber (13F) with a relatively large amount of resin, the first and second fibers (11F) (13F) are pulled out from the first and second impregnation portions (210) and (220). It is possible to correct the difference in the amount of resin detached due to the difference in the time required to enter the first and second curing molds 400 and 600.

For example, the temperature maintenance unit 700 may maintain the temperature of the resin contained in the impregnation tank 200 by circulating hot water inside the impregnation tank 200. At this time, as described above, the first and second temperature maintaining parts 710 and 720 circulate hot water of different temperatures into the first and second impregnating parts 210 and 220, The first and second impregnated parts 210 and 220 may maintain different temperatures.

Hereinafter, the tensile core manufacturing method according to an embodiment of the present invention will be described in more detail with reference to the attached drawings.

Figure 3 is a flow chart showing a tensile core manufacturing method according to an embodiment of the present invention.

Referring to FIG. 3, the tensile core manufacturing method according to this embodiment includes a fiber supply step (S100), a resin impregnation step (S200), an inner core forming step (S300), and an outer core forming step (S400).

More specifically, in the fiber supply step (S100), a plurality of first and second fibers 11F and 13F are supplied by the fiber supply unit 100. The first and second fibers 11F and 13F supplied in the fiber supply step (S100) may be carbon fiber and glass fiber, respectively, as described above.

Next, in the resin impregnation step (S200), the first and second fibers 11F and 13F pass through the impregnation tank 200 containing the resin. ) is impregnated with resin. In particular, in the resin impregnation step (S200), after the first fiber 11F is introduced into the impregnation tank 200, the second fiber 13F is introduced into the impregnation tank 200, and the first fiber 11F is introduced into the impregnation tank 200. After the fiber 11F is pulled out from the impregnation tank 200, the second fiber 13F is pulled out from the impregnation tank 200. As described above, this is to correct the time for the impregnated resin to be detached from the first and second fibers 11F and 13F.

Additionally, in the impregnation step (S200), the temperature of the resin contained in the impregnation tank 200 is maintained in a preset temperature range by the temperature maintenance unit 700. In particular, in the impregnation step (S200), the temperature of the second fiber 13F is higher than the temperature of the first impregnation unit 210, where the resin is impregnated as the first fiber 11F passes by the temperature maintaining unit 700. ) is passed through, the temperature of the second impregnation part 220 where the resin is impregnated is maintained low. As described above, this is to increase the amount of resin impregnated into the second fiber (13F) relative to the first fiber (11F).

And in the inner core forming step (S300), the first fibers 11F are mutually focused while passing through the first forming guide 300, and then pass through the first curing mold 400 with the impregnated resin and They are pultruded and heated together. Therefore, in the inner core forming step (S300), the resin impregnated in the first fiber 11F is cured, thereby forming the inner core 11 by the first fiber 11F.

Finally, in the outer core forming step (S400), the second fibers 13F are mutually focused while passing through the second forming guide 500, surround the inner core 11, and then form a second curing mold ( 600), it is pultruded and heated together with the impregnated resin. Therefore, in the outer core forming step (S400), the resin impregnated in the second fiber 13F is cured to form the outer core 13, so that the outer core 13 substantially surrounds the inner core 11. ) is formed.

1: Tensile core manufacturing system 100: Fiber supply unit
200: Impregnation tank 300: First forming guide
400: First curing mold 500: Second forming guide
600: Second curing mold 700: Temperature maintenance unit

Claims (11)

A fiber supply unit 100 that supplies a plurality of first and second fibers 11F and 13F;
An impregnation tank 200 in which the first and second fibers 11F and 13F supplied by the fiber supply unit 100 are impregnated with a resin contained therein as they pass, and the first fibers 11F pass through the impregnation tank 200. An impregnation tank 200 including a first impregnation part 210 into which the resin is impregnated and a second impregnation part 220 into which the resin is impregnated while passing the second fiber 13F;
A first forming guide 300 that guides the first fibers (11F) that passed through the impregnation tank (200) to be mutually focused and guides the second fibers (13F) that passed through the impregnation tank (200) to pass. );
Curing the resin by pultruding and heating the first fibers (11F) impregnated with resin so that the inner core (11) is formed by the first fibers (11F) focused by the first forming guide (300). First curing mold 400;
A second forming guide 500 that guides the second fibers 13F that have passed through the first forming guide 300 to be mutually focused and surround the inner core 11;
The inner core 11 and the resin are impregnated so that the outer core 13 surrounding the inner core 11 is formed by the second fibers 13F focused by the second forming guide 500. A second curing mold (600) for curing the resin by pultruding and heating the second fiber (13F); and
A temperature maintenance unit 700 that maintains the temperature of the resin contained in the impregnation tank 200 at a preset temperature, and a first temperature maintenance unit that maintains the temperature of the first impregnation unit 210 at the preset first temperature. A temperature maintenance unit 700 including (710) and a second temperature maintenance unit 720 that maintains the temperature of the second impregnation unit 220 at a preset second temperature lower than the first temperature;
A tensile core manufacturing system comprising:
delete According to claim 1,
After the first fiber (11F) is introduced into the first impregnated part 210, the second fiber (13F) is introduced into the second impregnated part 220, and the first fiber (11F) is introduced into the first impregnated part 210. A tensile core manufacturing system in which the second fiber (13F) is pulled out from the second impregnation section (220) after being pulled out from the first impregnation section (210).
delete delete A fiber supply step (S100) in which a plurality of first and second fibers 11F and 13F are supplied by the fiber supply unit 100;
A resin impregnation step (S200) in which the first and second fibers 11F and 13F are impregnated with the resin while passing through an impregnation tank 200 containing the resin. As, the temperature of the resin contained in the impregnation tank 200 is maintained in a preset temperature range by the temperature maintenance unit 700 (S200);
The first fibers 11F are mutually focused as they pass through the first forming guide 300, and then pass through the first curing mold 400 and are pultruded and heated together with the resin impregnated thereto to harden the resin, thereby curing the inner core. (11) forming an inner core (S300);
The second fibers 13F are mutually focused while passing through the second forming guide 500, surround the inner core 11, and then pass through the second curing mold 600 and are pulled and molded together with the resin impregnated thereto. An outer core forming step (S400) in which the outer core 13 is formed by heating and curing the resin; Including,
In the resin impregnation step (S200),
The second fiber (13F) is impregnated with resin while passing through it compared to the temperature of the first impregnating part (210) where the resin is impregnated as the first fiber (11F) passes by the temperature maintaining unit (700). A tensile core manufacturing method in which the temperature of the impregnated portion 220 is maintained low.
According to claim 6,
In the impregnation step (S200),
After the first fiber 11F is introduced into the impregnation tank 200, the second fiber 13F is introduced into the impregnation tank 200, and the first fiber 11F is introduced into the impregnation tank 200. A tensile core manufacturing method in which the second fiber (13F) is pulled out from the impregnation tank (200).
delete delete A tensile core manufactured by the tensile core manufacturing system according to claim 1, comprising:
An inner core 11 formed by a plurality of first fibers 11F; and
an outer core 13 formed by a plurality of second fibers 13F arranged to surround the inner core 11; Including,
As the first and second fibers (11F) (13F) pass through one impregnation tank (200) containing resin, the first and second fibers (11F) (13F) are impregnated with resin,
A tensile core in which the inner core 11 and the outer core 13 are formed by curing the resin impregnated in the first and second fibers 11F and 13F.
According to claim 10,
After the resin impregnated in the first fiber 11F is cured to form the inner core 11, the resin impregnated in the second fiber 13F is cured to surround the inner core 11. 13) The tensile core is formed.

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