KR20080051364A - Apparatus of adhesioncoating and method for manufacturing heat shrinkable tube using the same - Google Patents

Abstract

An apparatus for spraying an adhesive agent and a method for manufacturing a heat shrinkable tube using the apparatus are provided to spray the adhesive agent regardless of time after the heat shrinkable tube is expanded. An apparatus(50) for spraying an adhesive agent includes an adhesive agent supplying agent(51), a tube shape maintaining unit(52), a tube rotation member(53), a tube transferring member(57), and an adhesive agent spraying member(60). The adhesive agent supplying agent supplies a molten adhesive agent. The tube shape maintaining unit rotates by power supplied from an exterior to maintain the shape of a tube material. The tube rotation member provides rotation power to the tube shape maintaining unit to rotate the tube shape maintaining unit. The tube transferring member allows the tube shape maintaining unit to perform straight motion. The adhesive agent spraying member receives an adhesive agent from the adhesive supplying agent to spray the inner wall of the tube material.

Description

Adhesive coating apparatus and manufacturing method of heat shrinkable tube using the same {Apparatus of adhesioncoating and Method for manufacturing Heat Shrinkable Tube using the same}

The following drawings attached to this specification are illustrative of preferred embodiments of the present invention, and together with the detailed description of the invention to serve to further understand the technical spirit of the present invention, the present invention is a matter described in such drawings It should not be construed as limited to.

Figure 1a is a schematic diagram schematically showing an extrusion apparatus used in the manufacturing process of the heat shrink tube according to the prior art.

Figure 1b is a cross-sectional view showing a cross section of an extruded double tube wire according to the prior art.

2 is a process flowchart schematically showing a method of manufacturing a heat shrink tube according to an embodiment of the present invention.

3A is a schematic diagram schematically showing an extrusion apparatus in a method of manufacturing a heat shrink tube according to an embodiment of the present invention.

Figure 3b is a cross-sectional view showing a cross section of the extruded tube wire according to an embodiment of the present invention.

4A is a schematic diagram schematically showing an irradiation apparatus in a method of manufacturing a heat shrink tube according to an embodiment of the present invention.

Figure 4b is a cross-sectional view showing a cross-section of the cross-linked tube wire according to an embodiment of the present invention.

5A is a schematic diagram schematically showing an expansion device in the method of manufacturing a heat shrink tube according to an embodiment of the present invention.

Figure 5b is a cross-sectional view showing a cross section of the expanded tube wire according to an embodiment of the present invention.

6A is a schematic diagram schematically showing an adhesive applying device according to an embodiment of the present invention.

6B is a cross-sectional view illustrating a cross section of a heat shrink tube to which an adhesive is applied according to an embodiment of the present invention.

7 is a cross-sectional view taken along line AA ′ of FIG. 6A according to an embodiment of the present invention.

8 is a photograph of the inside of the heat-shrink tube to which the adhesive is applied according to an embodiment of the present invention.

Figure 9 is a photograph showing the inside of the cut by expanding the heat-shrink tube coated with an adhesive according to an embodiment of the present invention.

<Description of Major Reference Marks in Drawing>

50 ... adhesive application device 51 ... adhesive supply member

52. Tube round retaining means

54,56 ... Power transmission gear 55 ... Tube rotary motor

57 ... Tube linear feed member 58 ... Tube linear feed motor

59 power conversion means 60

Glue transfer tube 62 Glue application nozzle

The present invention relates to an adhesive coating device for a heat shrink tube and a method for producing a heat shrink tube using the device.

Heat shrink tube is a product that uses the memory effect of crosslinked polymer, and when heat is applied to the tube, it shrinks to the diameter before expansion. The heat shrink tube as described above has been mainly used to protect the connection portion of the wire, and in particular, it was used a lot to protect the wire connection in the electronic device. In recent years, its application area has been expanded and used a lot for industrial purposes, and especially for ships.

The ship's heat shrink tube is used to connect a ship's electric wire and is used to deliver a large amount of electricity such as switchboards and busbars. In particular, the ship's heat shrink tube is characterized in that the adhesive is applied inside the heat shrink tube due to the special environment used in the vessel. In this way, the heat-shrink tube to which the adhesive is applied serves to seal the periphery of the wire when the applied adhesive melts at high temperature when shrinkage occurs by applying heat. Since marine wires are used above the sea, it is very important to protect the connections of the wires from the surrounding environment, in particular from sea water. Therefore, the role of the adhesive in the ship's heat shrink tube is very important.

Looking at the manufacturing method of the ship heat shrink tube according to the prior art, first, the tube is extruded using a double extruder composed of an adhesive extruder that serves as an extruder and a sub-extruder. In this way, a tube wire with an adhesive applied to the inner surface of the tube is made, and the tube wire is passed through a cooling water bath to cool to room temperature, and then wound into a bobbin.

Hereinafter, a method for manufacturing a heat shrink tube according to the prior art will be described in more detail.

Figure 1a is a schematic diagram schematically showing an extrusion apparatus used in the manufacturing process of the heat shrink tube according to the prior art and Figure 1b is a cross-sectional view showing a cross section of the extruded double tube wire.

1A and 1B, a conventional extrusion apparatus includes a tube extruder 11 and an adhesive extruder 12 at the head 13 of the extruder. The polyethylene and the adhesive are fed to the tube extruder 11 and the adhesive extruder 12, respectively, and extruded through the extruder head 13 to form a double tube wire 100 and cooled while passing through the cooling water tank 14 The bobbin 15 is wound up. Here, the double tube wire 100 has a form in which the adhesive 102 is applied therein.

The double tube wire wound on the bobbin is moved to the irradiation step, and crosslinks the tube and the adhesive using an electron beam generated from the electron beam accelerator of the irradiator.

The said irradiation process is a process of bridge | crosslinking a tube wire by irradiating a beta ray to a double tube wire. In this case, as the thickness of the tube wire is thin, the beta wire can penetrate the tube well, but the double tube wire coated with the adhesive does not penetrate well, but the thickness is thick even though the wire does not transmit uniformly. In particular, the adhesive is difficult to uniformly irradiate compared to the single tube wire without the adhesive because the absorption rate of the exclusion line is more than twice as compared to the tube. If the double tube wire is not irradiated uniformly in the irradiation step as described above, there is a problem in that the degree of crosslinking in the radial direction is different and does not expand to a uniform thickness in the expansion step.

In other words, if the degree of crosslinking is not constant in the irradiation step, and the degree of crosslinking is not constant, when the thermal expansion step is performed in the expansion step, the low crosslinking portion expands first, and in some cases, the expansion is accelerated so that the tube itself is not torn or torn. Otherwise, severe swelling will be caused, resulting in poor quality.

The cross-section of the cross-linked double tube wire is the same as the extruded double tube wire, but the chemical structure is changed by electron beam irradiation to become the cross-linked tube and the cross-linked adhesive. The crosslinked double tube wire is wound into the bobbin again to move to the next step, the expansion step.

The crosslinked double tube wires moved to the expansion step are made of expanded double tube wires heated to a temperature sufficient to expand them. The expanded double tube wire becomes half or one third thinner than the crosslinked double tube wire and becomes a heat shrinkable tube coated with an adhesive therein.

On the other hand, the heat shrink tube is important to expand to a certain thickness for ease of use. For this purpose, it is very important to extrude to a uniform thickness in the radial direction during the extrusion step. If it is not extruded to a certain thickness, it is not irradiated uniformly in an irradiation process, and as a result, partial expansion occurs.

Therefore, in the extrusion step, the operator needs to adjust the thickness uniformly while generating scrap for a certain time to uniformly adjust the thickness. According to the prior art, since the two layers of the tube and the adhesive are extruded by double extrusion, the operator must uniformly adjust the thickness of the outer tube (preferably polyethylene or EVA) and then adjust the inner adhesive thickness again. In this process, twice as much scrap is generated than to match the thickness of one layer, resulting in a large cost loss.

In addition, eccentric extrusion occurs in the extrusion step because it is difficult to uniformly match the thickness of the two layers than one. This eccentric extrusion causes eccentric expansion, resulting in poor quality.

In the expansion step, since the double tube wire with the adhesive is thicker than the single tube wire without the adhesive, many defects occur. This is because thickening increases the probability of local expansion rather than uniform expansion. This local swelling causes tearing of the tube, causing failure.

The present invention was devised to solve the above-mentioned problems of the prior art, and in manufacturing a heat shrink tube coated with an adhesive therein with a large diameter, such as a ship heat shrink tube, the purpose is to reduce defects and to improve quality. have.

In order to achieve the above object, a method of manufacturing a heat shrink tube according to the present invention includes an extrusion step of extruding a heat shrink tube wire using an extruder; A crosslinking step of crosslinking the tube wire using an irradiator; An expansion step of expanding the crosslinked tube wire to a predetermined diameter; And an adhesive applying step of spirally applying an adhesive to the inner surface of the expanded tube wire.

Adhesive applying apparatus according to an aspect of the present invention for achieving the above technical problem, the adhesive supply member for continuously supplying the molten adhesive; A tube circular holding means provided with a hollow into which the expanded tube wire can be inserted and rotating by a power provided from the outside to maintain a circular shape of the tube wire inserted into the hollow; A tube rotating member for providing rotational power to the tube circular holding means to rotate the tube circular holding means; A tube straight conveying member for linearly moving the tube circular holding means; And an adhesive applying member, wherein the adhesive is applied to the inner wall of the tube wire rod which is continuously supplied with the molten adhesive from the adhesive supply member and inserted into the tube circular holding means to rotate and linearly move.

Preferably, the tube circular retaining means consists of a cylindrical tube having one body in the longitudinal direction or a combination of opposing semicircular tubes.

In the present invention, the tube rotating member includes a tube rotating motor for generating rotational power; A first power transmission gear coupled to the tube circular retaining means; And a second power transmission gear for transmitting the rotational power to the first power transmission gear.

In the present invention, the tube linear transfer member is a tube linear transfer motor for generating a rotational power; And power conversion means for converting the rotational power into linear motion.

In the present invention, the adhesive applying member is an adhesive transfer pipe coupled in communication with the adhesive supply member; And an adhesive applying nozzle provided at one end of the transfer pipe to apply an adhesive to the inner wall of the tube wire.

Preferably, the distance between the adhesive application nozzle and the inner surface of the tube is 3-10 mm.

Preferably, it may further comprise a cooling means coupled to the tube circular holding means.

Preferably, the air suction means for discharging air from the inner hollow of the tube circular holding means may be further provided.

Adhesive applying apparatus according to another aspect of the present invention for achieving the above technical problem, the adhesive supply member for continuously supplying the molten adhesive; A tube circular holding means provided with a hollow into which the expanded tube wire can be inserted and rotating by a power provided from the outside to maintain a circular shape of the tube wire inserted into the hollow; A tube rotating member for providing rotational power to the tube circular holding means to rotate the tube circular holding means; And an adhesive applying member for continuously applying the melted adhesive from the adhesive supply member and applying the adhesive using an adhesive conveying tube that is stretched and stretched on the inner wall of the tube wire rod inserted into the tube circular retaining means and rotating. Include.

Adhesive applying apparatus according to another aspect of the present invention for achieving the above technical problem, the adhesive supply member for continuously supplying the molten adhesive; A tube circular holding means provided with a hollow into which the expanded tube wire can be inserted and rotating by a power provided from the outside to maintain a circular shape of the tube wire inserted into the hollow; A tube rotating member for providing rotational power to the tube circular holding means to rotate the tube circular holding means; And using an adhesive applying nozzle connected to the inner wall of the tube wire rod which is continuously supplied with the molten adhesive from the adhesive supply member and inserted into the tube circular retaining means so as to linearly move along the adhesive feed tube. It includes; adhesive applying member to apply.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. Prior to this, terms or words used in the present specification and claims should not be construed as being limited to the common or dictionary meanings, and the inventors should properly explain the concept of terms in order to best explain their own invention. Based on the principle that can be defined, it should be interpreted as meaning and concept corresponding to the technical idea of the present invention. Therefore, the embodiments shown in the specification and the configuration shown in the drawings are only the most preferred embodiment of the present invention and do not represent all of the technical idea of the present invention, which can be replaced at the time of the present application It should be understood that there may be various equivalents and variations.

2 is a process flowchart schematically illustrating a manufacturing process of a heat shrink tube according to an embodiment of the present invention.

According to Figure 2, in the extrusion step (step 20), the polyethylene single tube wire 200 is extruded differently from the extrusion process according to the prior art. The extruded single tube wire 200 moves to the next step of irradiation step (step 30), and crosslinks the extruded single tube wire 200 using the irradiator 31. This cross-linked single tube wire 300 is expanded in the expansion step (step 40). As a result, a single tube wire 400 is manufactured.

Meanwhile, in the expansion step (step 40), the tube is cut into a predetermined length and the cut tube wire is a single tube wire 400 having no adhesive applied therein, so the single tube wire expanded using the adhesive applying device in the last step. Apply adhesive to 400.

As such, in the adhesive application step (step 50), the adhesive is applied to the single tube wire 400 to prepare the heat-shrinkable tube 500 to which the adhesive is applied.

In the same manner as described above, when manufacturing the heat-shrink tube 500 coated with the adhesive, the loss of extrusion during the double extrusion and the possibility of the knitting and the expansion that may occur in the irradiation step and the expansion step may be observed. There is an advantage that the failure rate is lowered by significantly lowering.

In addition, the adhesive may be applied at any time after the single tube wire 400 is expanded, and the type of adhesive or the thickness of the adhesive may be adjusted according to predetermined requirements.

In addition, since the pitch and thickness of the adhesive can be adjusted during the process as needed, there is an effect of significantly reducing the amount of adhesive that is relatively expensive compared to the tube material.

3A is a schematic diagram schematically showing an extrusion apparatus used in the method of manufacturing a heat shrinkable tube according to an embodiment of the present invention, and FIG. 3B is a cross-sectional view showing a cross section of a single tube wire extruded by the extrusion apparatus.

3A and 3B, the extrusion apparatus 20 includes an extruder head 22; A polyethylene extruder 21 coupled to the extruder head 22; A cooling water tank 23 for cooling the extruded single tube wire 200; And a first bobbin 24 winding the extruded single tube wire 200.

The extruder 20 has only a polyethylene extruder 21. Accordingly, when the tube wire 200 is extruded using the extrusion device 20, the tube wire 200 becomes a polyethylene single tube wire 201 without an adhesive applied therein.

4A is a schematic diagram schematically showing an irradiation apparatus used in the method of manufacturing a heat shrinkable tube according to an embodiment of the present invention, and FIG. 4B is a cross-sectional view showing a cross section of a single tube wire crosslinked by the irradiation apparatus.

4A and 4B, the irradiation apparatus 30 used in the present invention includes an electron beam accelerator 32 which emits a beta ray irradiator 31 for irradiating an electron beam; And a second bobbin 33 winding the cross-linked single tube wire 300.

When the extruded single tube wire 200 passes through the irradiator 31 provided with the electron beam accelerator 32, the single tube wire 200 is crosslinked by the beta rays emitted through the electron beam accelerator 32, and the single tube wire rod is crosslinked. Is converted to 300.

Here, since the adhesive absorbs beta rays more than twice, the single tube wire 200 without adhesive is irradiated relatively uniformly compared to the double tube wire 100 with adhesive. The cross-linked single tube wire 300 is wound around the second bobbin 33.

5A is a schematic diagram schematically showing an expansion device used in the method of manufacturing a heat shrink tube according to an embodiment of the present invention, and FIG. 5B is a cross-sectional view showing a cross section of a single tube wire expanded using the expansion device.

According to FIGS. 5A and 5B, the cross-linked single tube wire 300 is heated in the heating part 41 and the heated single tube wire 300 is expanded in the expansion part 42 to be drawn into the intake machine 43. To make the expanded single tube wire 400. Then, the expanded single tube wire 400 is wound around the third bobbin 44.

Since the inner wall of the single tube wire 300 is not coated when the tube wire is expanded in the expansion step (step 40 of FIG. 2), it is uniformly compared with the conventional double tube wire 100 in which the adhesive is applied therein. In addition to being expanded, the thickness is thin, so the expansion is well performed.

In addition, the expanded single tube wire 400 is cut to a predetermined length and transferred to the next step, the adhesive application step (step 50 of FIG. 2). The expanded single tube wire 400 cut to a predetermined length is mounted to the tube circular retaining means 52 and the adhesive is applied to the inside at a constant pitch by the adhesive applying member 60. That is, the adhesive is applied to the heat shrink tube that is the expanded single tube wire 400 in a spiral shape of a constant pitch.

6A is a schematic diagram schematically showing an adhesive applying apparatus according to an embodiment of the present invention, FIG. 6B is a cross-sectional view showing a cross section of a heat shrinkable tube to which an adhesive is applied using the adhesive applying apparatus, and FIG. It is sectional drawing along the A-A 'line | wire of 6a.

6A, 6B, and 7, the adhesive applying device 50 has an expanded single tube wire 400 inserted into the adhesive supply member 51 for continuously melting and continuously supplying an adhesive resin formed of a pellet type. Tube circular holding means (52) Tube circular holding means (52) for maintaining the shape of a single tube wire 400 inserted into the cylindrical hollow by having a cylindrical hollow that can be rotated by an externally applied power Tube rotating member 53 for providing rotational power to the tube is provided on the opposite side of the adhesive supply member 51 and the tube linear conveying member for conveying the tube circular holding means 52 in a straight direction in order to uniformly apply the adhesive. And an adhesive applying member 60 for receiving the adhesive from the adhesive supply member 51 and applying the adhesive to the inside of the tube inserted in the tube circular retaining means 52. do.

The tube circular retaining means 52 may be formed of a cylindrical tube, or may be formed in a shape arranged so that two tubes of a semicircular shape divided in half the cylindrical tube face each other. As part of reinforcing the circular holding force of the tube wire, the tube circular holding means 52 may be connected to an air intake device for sucking the air in the inner hollow.

In addition, the tube circular retaining means 52 is further provided with a water-cooled or air-cooled cooling device (not shown) to prevent the heat shrink tube 501 located on the inner wall from being shrunk by the heat generated by the adhesive coating nozzle 62. can do.

Preferably, when the inner diameter of the heat shrink tube 501 is 40 mm or more, the diameter of the hollow provided in the tube circular holding means 52 is 40 mm or more.

The adhesive applying member 60 communicates with the adhesive supply member 51 to continuously convey the molten adhesive and extends along the hollow axis of the tube circular retaining means 52, and the adhesive conveying tube. It is composed of an adhesive applying nozzle 62 which is provided at the end of 61 and uniformly sprays the adhesive with a constant pitch on the inner surface of the tube wire rod inserted into the hollow and rotating.

The distance between the adhesive application nozzle 62 and the inner surface of the heat shrink tube 501 is preferably 0-20 mm, more preferably 3-10 mm.

On the other hand, the amount of the adhesive supplied from the adhesive supply member 51 is adjusted in accordance with the thickness of the adhesive applied to the inner surface of the heat shrink tube 501 and the applied shape.

The thickness of the adhesive applied spirally is proportional to the amount of adhesive supplied and is related to the distance between the adhesive application nozzle 62 and the inner surface of the heat shrink tube 501. That is, the pitch of the adhesive applied spirally is related to the rotational speed of the heat shrink tube 501 and the linear conveyance speed. In particular, if the pitch is adjusted very small, the entire surface of the heat shrink tube 501 can be coated with an adhesive.

The tube rotating member 53 is a tube rotating motor 55 for generating power for rotating the tube so that the adhesive applying nozzle 62 can uniformly apply the adhesive to the inside of the tube wire, which is kept in a circular shape, The first power transmission gear 54 provided on the outer circumferential surface of the circular holding means 52, and the second power transmission gear 56 for transmitting the power generated from the tube rotation motor 55 to the first power transmission gear. Consists of

The tube linear transfer member 57 transfers the heat shrink tube 501 in a linear direction so that the adhesive can be applied at a constant pitch using an adhesive applying nozzle 62 inside the heat shrink tube 501 maintained in a circular shape. It consists of the tube linear feed motor 58 and the power conversion means 59 which converts rotational motion into linear motion.

Then, the process of applying the adhesive to the heat shrink tube 501 inside using the adhesive applying device according to the present invention will be described in more detail.

First, the single tube wire is inserted into the hollow provided in the tube circular holding means 52 and then the tube circular holding means 52 is rotated using the tube rotating member 53. At the same time, the tube circular holding means 52 is gradually transferred from left to right using the tube linear moving member 57. In this state, the molten adhesive is continuously supplied through the adhesive transfer pipe 61 to spray the adhesive onto the inner wall of the single tube wire through the adhesive applying nozzle 62. At this time, since the tube circular retaining means 52 is rotated and simultaneously transferred in a straight line, the adhesive is applied in a spiral while having a constant pitch.

On the other hand, the tube circular retaining means 52 can apply the adhesive while rotating and moving the adhesive applying member 60 in a straight line inside the hollow of the tube. More specifically, the adhesive conveying pipe 61 can be applied while moving in the straight direction in the hollow inside of the tube while the tube circular retaining means 52 rotates. That is, the adhesive 502 is injected into the tube that rotates by spraying the adhesive from the adhesive applying nozzle 62 provided at the end of the adhesive transfer tube 61 while extending or stretching the length of the adhesive transfer tube 61. It can be applied in a spiral of constant pitch.

In addition, the adhesive applying nozzle 62 connected to the adhesive conveying tube 61 is movable in a linear direction along the adhesive conveying tube 61 in the hollow inside of the tube while the tube circular retaining means 52 rotates. The adhesive 502 may be applied to the inside of the rotating tube by spraying the adhesive while moving from side to side.

At the time of adhesive application, the adhesive application nozzle 62 may be in contact with the inner surface of the heat shrink tube 501 or may be spaced apart at a certain distance. The position of the adhesive application nozzle 62 may vary depending on the amount of adhesive to be applied and the thickness of the adhesive.

<Example>

The melting temperature of the adhesive used was 90 ℃, the material of the heat shrink tube 501 is EVA and the temperature of the adhesive supply member was maintained at 110 ℃ to melt the adhesive.

In addition, the adhesive transfer pipe 61 and the adhesive application nozzle 62 were heated to 90 ° C. in order to prevent the adhesive from hardening during the transfer. And the screw rotation speed of the adhesive supply member 51 was 10 rpm. The adhesive applying nozzle 62 had a diameter of 1 mm, and the circular retaining means 52 holding the heat shrink tube 501 in a circular shape used a tubular device but did not use a vacuum or a cooling device.

And the rotational speed of the tube was 20 rpm, and the linear feed speed was 10 mpm. As a result of manufacturing under these conditions, as shown in FIGS. 8 and 9, the heat-shrink tube 500 in which the adhesive 502 was applied in a spiral shape having a constant pitch could be manufactured.

Here, Figure 9 shows a cross section of the heat shrink tube 500 to which the adhesive is applied. Referring to Figure 9, it can be seen that the adhesive is applied at a constant pitch inside the adhesive coating heat shrink tube 500.

As described above, although the present invention has been described by way of limited embodiments and drawings, the present invention is not limited thereto and is intended by those skilled in the art to which the present invention pertains. Of course, various modifications and variations are possible within the scope of the claims to be described.

According to the present invention, the quality defects can be prevented by reducing the possibility of loss due to double extrusion and the possibility of knitting and knitting which may occur in the irradiation process and the expansion process. In addition, using the present invention, there is an advantage that the adhesive can be applied at any time after the expansion of the heat shrink tube. Therefore, there is an advantage that the type of adhesive or the thickness of the adhesive can be changed according to a predetermined request of the consumer. In addition, since the pitch and thickness of the adhesive can be adjusted during the process, if necessary, the amount of adhesive that is relatively expensive compared to the tube material is significantly reduced.

Claims (11)

As a method of manufacturing a heat shrink tube in which an adhesive is applied therein, An extrusion step of extruding the heat shrink tube wire using an extruder; A crosslinking step of crosslinking the tube wire using an irradiator; An expansion step of expanding the crosslinked tube wire to a predetermined diameter; And And an adhesive applying step of spirally applying an adhesive to the inner surface of the expanded tube wire. An adhesive applying device for applying an adhesive to the inner surface of the heat shrink tube, Adhesive supply member for continuously supplying molten adhesive Tube circular retaining means is provided with a hollow into which the expanded tube wire can be inserted and rotated by power provided from the outside to maintain the shape of the tube wire inserted into the hollow in a circular shape. A tube rotating member for providing rotational power to the tube circular holding means to rotate the tube circular holding means A tube straight conveying member for linearly moving the tube circular holding means; and And an adhesive applying member for continuously receiving molten adhesive from the adhesive supply member and inserting the adhesive to the inner wall of the tube wire rod inserted into the tube circular holding means and rotating and linearly moving. The method of claim 2, And said tube circular retaining means comprises a combination of a cylindrical tube having one body in the longitudinal direction or of opposing semicircular tubes. The method of claim 2, The tube rotating member A tube rotating motor for generating rotational power; A first power transmission gear coupled to the tube circular retaining means; And And a second power transmission gear for transmitting the rotational power to the first power transmission gear. The method of claim 2, The tube straight conveying member A tube linear feed motor for generating rotational power; And And power conversion means for converting the rotational power into linear motion. The method of claim 2, The adhesive applying member is An adhesive conveying tube coupled in communication with the adhesive supply member; And And an adhesive applying nozzle provided at one end of the transfer pipe to apply an adhesive to the inner wall of the tube wire. The method of claim 2, Adhesive applying apparatus, characterized in that the distance between the adhesive coating nozzle and the tube inner surface is 3-10mm. The method of claim 2, And a cooling means coupled to said tube circular holding means. The method of claim 2, And an air suction means for discharging air from the inner hollow of the tube circular holding means. An adhesive applying device for applying an adhesive to the inner surface of the heat shrink tube, An adhesive supply member for continuously supplying the molten adhesive; A tube circular holding means provided with a hollow into which the expanded tube wire can be inserted and rotating by a power provided from the outside to maintain the shape of the tube wire inserted into the hollow in a circular shape; A tube rotating member for providing rotational power to the tube circular holding means to rotate the tube circular holding means; And And an adhesive applying member which continuously receives the molten adhesive from the adhesive supply member and applies the adhesive using an adhesive conveying tube that is stretched and stretched on the inner wall of the tube wire rod inserted into the tube circular retaining means and rotating. Adhesive coating apparatus characterized by the above-mentioned. An adhesive applying device for applying an adhesive to the inner surface of the heat shrink tube, An adhesive supply member for continuously supplying the molten adhesive; A tube circular holding means provided with a hollow into which the expanded tube wire can be inserted and rotating by a power provided from the outside to maintain a circular shape of the tube wire inserted into the hollow; A tube rotating member for providing rotational power to the tube circular holding means to rotate the tube circular holding means; And The adhesive is applied using an adhesive coating nozzle which is continuously supplied with the molten adhesive from the adhesive supply member and inserted into the tube circular retaining means and linearly moves along the adhesive feed tube to the inner wall of the tube wire rod which rotates. Adhesive coating device; comprising an adhesive coating member.

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