KR100860181B1 - Apparatus and method for multi-irradiation crosslinking using infrared ray - Google Patents

Abstract

The present invention relates to a crosslinking apparatus using infrared rays, and more particularly, to an infrared crosslinking apparatus for improving the efficiency of infrared irradiation with a limited apparatus and crosslinking wires at high speed. To this end, the multi-irradiation crosslinking apparatus using the infrared ray of the present invention includes an infrared heating unit for irradiating infrared rays to the wire rod supplied from the lead portion; At least one guide unit for manipulating the feeding direction of the wire rod passing through the infrared heating unit to supply it to the infrared heating unit again; And a cooling unit which cools the wire rod guided by the guide unit at least once and passed through the infrared heating unit.

Wire rod, crosslinking device, infrared

Description

Apparatus and method for multi-irradiation crosslinking using infrared ray}

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

1 and 2 are views showing the main configuration of the wire crosslinking device according to the prior art.

Figure 3 is a block diagram showing the main configuration of the multi-irradiation crosslinking apparatus using infrared rays according to an embodiment of the present invention.

4 is a view showing an infrared heating unit of the multi-irradiation crosslinking apparatus of FIG.

5 is a view showing a multi-irradiation crosslinking device using infrared rays according to another embodiment of the present invention.

6 is a view showing an infrared heating unit of a multi-irradiation crosslinking apparatus using infrared rays according to another embodiment of the present invention.

<Explanation of symbols for the main parts of the drawings>

10, 20: wire crosslinking device 100: multi-irradiation crosslinking device using infrared

130: infrared heating unit 131: infrared lamp

132: reflector 160: guide unit

170: cooling unit 200: wire rod

The present invention relates to a crosslinking apparatus using infrared rays, and more particularly, to an infrared crosslinking apparatus for improving the efficiency of infrared irradiation with a limited apparatus and crosslinking wires at high speed.

Generally, an electric wire consists of a wire through which an electric current flows and a polymer coated on the wire for insulation. The wire rod is a metal with good electrical conductivity such as copper, aluminum, and the like.

The polymer is coated on the wire rod in an extruder. At this time, in order to increase the chemical, electrical, and mechanical properties of the polymer, crosslinking is performed. There are three main methods for crosslinking.

The three methods include a silane method using trismethoxy vinyl silane, an irradiation crosslinking method that causes crosslinking by applying irradiation energy to a polymer chain using an electron beam or UV radiation, and an additive or crosslinking agent such as an organic peroxide agent. It is a chemical crosslinking method in which crosslinking is performed by a radical formed by the same.

In the chemical crosslinking method, the crosslinking reaction is usually conducted by heat. A continuous catenary valcunization (CCV) method has been proposed to effectively transfer heat to an insulator polymer to react additives or crosslinkers. CCV transfers heat using steam or heated nitrogen. However, the CCV method takes considerable time to transfer heat from the surface of the polymer to the inside because heat is transferred by conduction. In particular, since the polymer is a non-conductor having a very low conduction coefficient, there is a problem that it takes a long time for crosslinking due to a slow rate of heat transfer.

In order to solve the problem of the CCV method, an apparatus for heating a polymer by irradiating radiation has been proposed. Such a device is disclosed in US Pat. No. 4,234,624. As shown in FIG. 1, the device 10 heats the polymer by providing radiation means 13 for irradiating radiation auxiliary to the outside of the crosslinked tube 12.

First, the polymer 3 is coated on the wire rod 1 using the extruder 14. Subsequently, the polymer 3 is heated using steam or heated nitrogen while the wire rod 1 is moved through the crosslinking tube 12. At the same time, the radiant heat is radiated to the crosslinked tube 12 using the radiating means 13 to radiate heat from the crosslinked tube 12 so that the radiant heat is transferred to the polymer 3.

Although the apparatus 10 has better heat transfer efficiency than the CCV method because it uses radiant heat, it must be transferred to the inside of the polymer 3 by conduction after the radiant heat reaches the surface of the polymer 3. Therefore, there is still a problem that it is difficult to form a crosslink in a short time. In particular, when the intensity of radiant heat is increased to achieve crosslinking within a short time, the surface of the polymer 3 may be damaged.

In order to solve the problem of the apparatus 10, an apparatus for crosslinking a polymer by irradiating radiation of a specific wavelength band has been proposed. Such a device is disclosed in European patent EP0921921. As shown in FIG. 2, the apparatus 20 crosslinks the polymer using an infrared irradiation member 23 installed in the crosslinking oven 22. That is, the extruder 26 extrudes the tube 7 of a predetermined shape using a compound in which the polyethylene 24 and the crosslinking agent 25 are mixed. The tube 7 is crosslinked by the infrared irradiation member 23 while passing through the crosslinking oven 22, and the crosslinked tube 7 is cooled while passing through the cooling bath 27. The cooled tube 7 is drawn by the capstan 28 and wound around the winder 29.

The infrared irradiation member 23 irradiates infrared rays of different wavelengths from the absorption wavelength band of the polymer. This is to prevent the surface of the polymer from being heated excessively. In addition, by using the absorption peak wavelength band of the additive or the crosslinking agent, only the additive or the crosslinking agent can be reacted to increase the crosslinking efficiency.

However, the device 20 requires a special filter to filter the absorption wavelength band of the polymer, and has a problem in that thermal efficiency is lowered because the absorption peak of the polymer is excluded.

In addition, in order to increase the working speed in the existing production line, several crosslinking devices were required. This is because the flux and the degree of crosslinking of the wire rod are inversely proportional. Therefore, the repetitive investment in the infrared cross-linking device increases the required cost of the initial equipment, there is a disadvantage that the cost of the product rises.

In particular, the use of a plurality of infrared cross-linking device, there is a problem that the maintenance cost of the entire equipment increases if the sum of the maintenance costs required for each device. In addition, there is a problem that the space of the entire cross-linking equipment is increased as a plurality of equipment is installed.

The present invention has been made to solve the above problems, and an object thereof is to provide an infrared crosslinking device which improves the efficiency of infrared irradiation in order to crosslink wires at high speed.

Another object of the present invention is to provide an infrared crosslinking device that can improve the efficiency of the infrared irradiation process with a relatively low additional cost and maintenance cost.

Other objects and advantages of the invention will be described below and will be appreciated by the embodiments of the invention. Furthermore, the objects and advantages of the present invention can be realized by means and combinations indicated in the appended claims.

In order to achieve the above object, the multi-irradiation crosslinking apparatus using infrared rays according to the present invention comprises: an infrared heating unit for irradiating infrared rays to wires supplied from the lead portion; At least one guide unit for manipulating the feeding direction of the wire rod passing through the infrared heating unit to supply it to the infrared heating unit again; And a cooling unit which cools the wire rod guided by the guide unit at least once and passed through the infrared heating unit.

Preferably, the guide unit is composed of at least one direction switching member for changing the direction of movement of the wire rod.

In particular, the turning member is preferably any one of a pinch roll, a guide roll, and a turning wheel.

In addition, the guide unit is preferably re-introduced to the infrared heating unit by reversing the wire rod discharged from the infrared heating unit at least four times 90 degrees.

In addition, the guide unit is preferably re-introduced the wire rod discharged from the infrared heating unit into the infrared heating unit through the two acute angle change and one obtuse direction change.

Furthermore, the drawing unit may include: a drawing unit for supplying a wire rod used for wire processing or a material subjected to pre-processing; And an extrusion unit which adds a crosslinking material to the compound and coats the wire or material.

Preferably, the wire is a material in the form of a continuous line that is bendable.

More preferably, the wire rod is made of any one of wires, pipes, and tubes.

Further, the infrared heating unit, the infrared lamp for generating infrared light; And a reflector reflecting the infrared rays in order to increase the infrared radiation efficiency of the infrared lamp.

In addition, the infrared heating unit is preferably provided with at least one pair in a direction corresponding to each other around the wire rod.

In addition, it is preferable that a plurality of wire rods pass through the center of the infrared heating unit.

According to another aspect of the invention, passing the wire to be processed through the infrared heating device; Passing the wire rod having passed through the infrared heater to the infrared heater again using a turning member; And a step of cooling the wire rod repeatedly irradiated with infrared rays through the infrared heating device at least once.

According to another aspect of the invention, the step of supplying the workpiece wire in the drawer; Extruding the electric wire by coating the coating member to which the crosslinking material is added to the supplied wire rod; Heating the coating member by irradiating infrared rays to the wires extruded by the infrared heating apparatus; Repeatedly heating the irradiated wire in the infrared heater; Cooling the repeatedly heated wires; It is provided with a wire crosslinking method using infrared repeating irradiation comprising; and winding the cooled wire to the bobbin.

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 specification and claims should not be construed as having a conventional or dictionary meaning, 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 described in the specification and the drawings 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, various modifications that can be replaced at the time of the present application It should be understood that there may be equivalents and variations.

3 is a view showing the main configuration of the multi-irradiation crosslinking apparatus using infrared rays according to an embodiment of the present invention, Figure 4 is a view showing the infrared heating unit of the multi-irradiation crosslinking apparatus.

3 and 4, the multi-irradiation crosslinking device 100 using infrared rays according to an embodiment of the present invention, the drawing unit 110 for supplying a wire rod 200 to be processed, and the supplied wire rod 200 ) The extrusion unit 120 to coat the polymer to produce an electric wire, the infrared heating unit 130 for irradiating infrared rays to the wire rod 200, and the wire rod 200 passing through the infrared heating unit 130 again And a cooling unit 170 for cooling the wire rod 200 repeatedly irradiated through the infrared heating unit 130 and the guide unit 160. The guide unit 160 guides the moving direction to pass through the heating unit.

The drawing unit 110 supplies the wire rod 200 required for wire processing or a material subjected to pre-processing. In addition, in conjunction with the extrusion unit 120, the winding machine 180, and the like to be described later to control the withdrawal speed of the wire rod 200. Alternatively, the rotational speed is controlled independently to adjust the drawing speed of the wire rod 200.

The extrusion unit 120 coats a polymer on the wire rod 200 to produce a wire. The extrusion unit 120 has a conventional structure by coating the wire rod 200 using a compound in which an additive or a crosslinking agent is mixed in the polymer. Peroxides and the like are used as the crosslinking agent.

However, when the wire rod (for example, coated wire, small pipe, tube, etc.) processed before is supplied from the drawing unit 110, it may move to the infrared heating unit 130 without passing through the extrusion unit 120. have.

The polymer coated wire or preprocessed wire is moved to the infrared heating unit 130.

The infrared heating unit 130 heats and crosslinks the polymer coated or included in the wire rod 200 with infrared rays. The infrared heating unit 130 includes an infrared lamp 131 for irradiating infrared rays and a reflecting plate 132 for reflecting infrared rays generated by the infrared lamp 131.

The infrared lamp 132 generates heat and light by flowing electricity to the filament therein. In particular, the desired temperature can be generated by adjusting the temperature of the filament. In addition, various types of lamps having different wavelength bands of maximum peaks, maximum outputs, and the like may be used.

The reflector 132 is positioned at the rear surface of the lamp to irradiate infrared rays generated from the infrared lamp 131 in one direction. The reflecting plate 132 may use a gold plated metal plate having good reflection efficiency or may be used by polishing metal. In particular, it is preferable to polish and use aluminum or copper with a high reflectance. In addition, the reflector plate 132 is irradiated with infrared rays to the rear of the infrared lamp 131 to prevent the entire infrared heating unit 130 is heated and damaged.

In the infrared heating unit 130, a plurality of wire rods 200 pass through the center and an infrared lamp 131 and a reflecting plate 132 are disposed along the other side. Each reflecting plate 132 disposed on the outer surface of the infrared heating unit 130 is disposed behind the infrared lamp 131 with respect to the center. This is to reflect infrared rays to the wire rod 200 passing through the center. In particular, a plurality of wire rods 200 pass through the center, and in order to apply thermal energy evenly to the wire rods 200, the reflection plate 132 may be half of a curve that may be reflected as parallel light without focusing on some areas. Take a slope form.

In addition, it is preferable to arrange the quartz plate 133 between the infrared lamp 131 and the wire member 200 in the center. This is to prevent the collision between the wire rod 200 and the infrared lamp 131. In addition, the reflecting plate 132 is irradiated from the infrared lamp 131 opposite to the infrared rays reflected from the wire member 200 in the center to reflect back the infrared rays passing through the wire member 200 in the center to increase the crosslinking efficiency of the wire rod 200. Can be.

Preferably, an infrared control unit 150 for controlling the output of the infrared heating unit 130 and a signal line 140 for transmitting a control signal to adjust the output of the infrared heating unit 130.

The guide unit 160 guides the wire rod 200 passing through the infrared heating unit 130 to enter the infrared heating unit 130 again. The guide unit 160 is provided with a direction changing member 161 to guide the moving direction of the wire rod 200 sent out. The turning member 161 may be a pinch roll, a guide roll, a turning wheel, or the like.

As shown in FIG. 3, the guide unit 160 was able to irradiate infrared rays three more times with the infrared heating unit 130 using twelve pinch rolls. To this end, pinch rolls are disposed at each corner of the wire rod 200 to form a spiral in a rectangular shape. The pinch rolls change the moving direction of the wire rod 200, and the switching angle is about 90 degrees. However, the present invention is not limited thereto, and the guide unit 160 having various structures may be formed.

The cooling unit 170 is installed at the rear of the infrared heating unit 130 to cool the crosslinked wire rod 200. The wire rod 200 which has been crosslinked by passing through the cooling unit 170 is drawn out by the capstan and wound around the bobbin through the winding unit 180.

5 is a view showing a multi-irradiation crosslinking device 100 'using infrared rays according to another embodiment of the present invention.

Referring to FIG. 5, the multi-irradiation crosslinking device 100 ′ using infrared rays according to another embodiment of the present invention includes a modified guide unit 160 ′. The deformed guide unit 160 ′ uses nine pinch rolls 161. The pinch rolls 161 are disposed at each corner of the wire rod 200 to form a triangular spiral.

As such, there may be various embodiments in which the structure is modified as in the guide units 160 and 160 ′ of FIGS. 3 and 5.

As another example, the wire rod is discharged by placing a guide roll or a turning wheel on the inlet side into which the wire rod 200 of the infrared heating unit 130 enters and the outlet side from which the wire rod 200 is discharged after the infrared rays are irradiated. The structure 200 may be configured to reciprocate with the infrared heating unit 130 interposed therebetween.

In addition, the plurality of wire rods 200 passing through the infrared heating unit 130 may be arranged in various forms.

Referring to FIG. 6, there is shown an arrangement of wire rods 200 ′ that pass through an infrared heating unit 130 ′ in accordance with a modified embodiment. As such, the wire rods 200 moving in the infrared heating unit 130 and irradiated with infrared rays may be arranged in various forms. The arranged forms may receive the maximum heat energy from the minimum infrared lamp 131. It is desirable to.

Then, the operation of the multi-irradiation crosslinking device 100 using infrared rays according to an embodiment of the present invention will be described.

First, the wire rod 200 supplied from the drawing unit 110 is moved to the extrusion unit 120. The extrusion unit 120 coats a polymer on the wire rod 200 to produce an electric wire.

The polymer coated wire is moved to the infrared heating unit 130. Infrared rays are emitted from the infrared lamp 131, and the infrared rays transmitted through the wires are reflected by the reflecting plate 132 and irradiated to the wires again. In addition, the infrared rays reflected by the electric wires are also reflected by the reflecting plate 132 and irradiated to the electric wires again.

The wire passing through the infrared heating unit 130 is moved to the infrared heating unit 130 by the guide unit 160 again. At this time, the direction of movement of the wire is guided according to the arrangement of the turning member 161. (Induction step)

After repeating the irradiation step and the induction step several times, the sufficiently heated wire is moved to the cooling unit 170. The cooling unit 170 cools the heated wire to complete the crosslinking.

After the bridge is completed, the wire is drawn out by the capstan and wound up through the winding unit 180, and then wound around the bobbin.

In the above, the multi-irradiation crosslinking apparatus and method using infrared rays of this invention were demonstrated in detail. By using the present invention, it is possible to repeatedly irradiate infrared rays in the wire rod processing step to produce a wire rod at a high speed. This is a result of resolving the disadvantage of low crosslinking degree due to the moving speed of the wire rod by repeated infrared irradiation.

In addition, since the wire rod is repeatedly crosslinked in one infrared heating unit, the installation of additional equipment and the corresponding space can be reduced.

Furthermore, the use of a single infrared heating unit has the effect of saving maintenance costs than when using a large number of equipment.

The terms or words used in this specification and claims are not to be construed as limiting in their usual or dictionary meanings, and the inventors may appropriately define the concept of terms in order to best explain their invention in the best way possible. It should be interpreted as meaning and concept corresponding to the technical idea of the present invention based on the principle that the present invention.

Therefore, the embodiments described in the specification and the drawings 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, various modifications that can be replaced at the time of the present application It should be understood that there may be equivalents and variations.

As described above, the multi-irradiation crosslinking device using infrared rays according to the present invention has the following effects.

First, wire rods with sufficient degree of crosslinking can be produced at high speed.

Second, it is possible to produce wire rods with sufficient degree of crosslinking with relatively few additional equipment and space.

Third, the wire rod can be crosslinked with sufficient crosslinking with relatively low maintenance cost.

Claims (13)

A drawing unit comprising a drawing unit for supplying a wire rod or a pre-processed material used for electric wire processing and an extrusion unit covering the wire rod or material with a compound added with a crosslinking material to the polymer; An infrared heating unit for irradiating infrared rays to the wire rod supplied from the lead portion; At least one guide unit for re-injecting the wire discharged from the infrared heating unit into the infrared heating unit through two acute angle changes and one obtuse direction change; And And a cooling unit for cooling the wire rod guided by the guide unit at least once and passing through the infrared heating unit. The method of claim 1, The guide unit is a multi-irradiation crosslinking device using infrared rays, characterized in that made of at least one direction changing member for changing the direction of movement of the wire rod. The method of claim 2, The diverting member is a multi-radiation crosslinking device using infrared rays, characterized in that any one of a pinch roll (Pinch Roll), a guide roll (Guide Roll), a turning wheel (Wheel). delete delete delete The method of claim 1, The wire rod is a multi-irradiation cross-linking device using infrared rays, characterized in that the material of the continuous linear form. The method of claim 7, wherein The wire rod is a multi-irradiation bridge using infrared rays, characterized in that any one of the wire, pipe, tube. The method of claim 1, The infrared heating unit, An infrared lamp generating infrared light; And Multi-irradiation cross-linking device using infrared rays, characterized in that it comprises a; reflecting plate for reflecting the infrared ray to increase the infrared radiation efficiency of the infrared lamp. The method of claim 9, The infrared heating unit is a multi-irradiation crosslinking device using infrared rays, characterized in that at least one pair is provided in a direction corresponding to each other around the wire. The method according to any one of claims 1, 2, 3, 7, 8, 9 or 10, The multi-irradiation crosslinking device using infrared rays, characterized in that a plurality of wire rods pass through the center of the infrared heating unit. Passing the wire to be processed through an infrared heater; Re-injecting the wire rod having passed through the infrared heating device into the infrared heating unit through two acute angle changes and one obtuse direction change using a redirection member; And Cooling the wire rod repeatedly irradiated with infrared rays through the infrared heating device at least once; multi-irradiation crosslinking method using infrared rays comprising a. Supplying the processed wire rod in a drawer; Extruding the electric wire by coating the coating member to which the crosslinking material is added to the supplied wire rod; Heating the coating member by irradiating infrared rays to the wires extruded by the infrared heating apparatus; Re-injecting the irradiated wires into the infrared heating apparatus through two acute angle turns and one obtuse direction turns to repeatedly heat them; Cooling the repeatedly heated wires; And Winding the cooled wire and winding the bobbin; a wire crosslinking method using infrared repeating irradiation comprising a.

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