KR101016968B1 - Ribbon type electric cables made from sheathed unit cables and manufacturing method thereof - Google Patents

Abstract

PURPOSE: A manufacturing method of the ribbon type adhesive wire is provided to the manufacture the ribbon adhesion wire out of polyolefine cover by bonding the covers of a plurality of wires touching each other in parallel. CONSTITUTION: The heat rollers(9a, 9b) form as many grooves(11) as the number of the unit cover wires. A heat roller(9b) comprises the resin block wall(5). A heat roller(9a) includes a concave groove formed along the external surface of the roller. The resin block wall and the concave groove prevents the moving of the cover.

Description

Method of manufacturing ribbon-type spliced wire {RIBBON TYPE ELECTRIC CABLES MADE FROM SHEATHED UNIT CABLES AND MANUFACTURING METHOD THEREOF}

The present invention relates to a method for manufacturing a ribbon-type twisted-pair wire, and more particularly, to a method for manufacturing a ribbon-type twisted-pair wire that is formed in a ribbon shape by joining the plurality of unit-covered wires side by side in the longitudinal direction and joining the coatings together.

1 is an enlarged view showing the diameter of the unit coated wire used in the manufacture of the ribbon-type connection wire 3 to 5 times, Figure 2a to 2c is made by joining a plurality of unit coated wires shown in FIG. It is an enlarged view 3 to 5 times of the ribbon connection wire. The actual outer diameter of the unit coated wire used in the production of the ribbon-type connected wire according to the present invention is about 0.7 mm to 2 mm. An aggregated conductor (mainly copper wire) thin wire is provided at the center of the sheath of the unit coated wire to transmit a signal or electric power. Conventionally, the coating of the unit coating wire was extruded by polyvinyl chloride resin (PVC).

Electronic devices including two or more components or printed circuit boards frequently use ribbon-type interconnects to electrically connect two components or printed circuit boards. If necessary, connectors may be attached at both ends to be used in the form of a harness. Here, ribbon type electric wires are wires in which two or more single-covered wires as shown in FIG. 1 are adjacent to each other and bonded to each other. Since the ribbon-type connection wire is flat in overall cross section, it is also called a flat cable. FIG. 2A shows a 2-wire ribbon-shaped junction wire, FIG. 2B shows a 3-wire ribbon-type junction wire, and FIG. 2C shows a 5-wire ribbon-type junction wire. Although not shown in the figure, a four-wire ribbon-shaped connection wire or a ribbon-type connection wire of six or more lines is also possible. As described above, the ribbon-type connected wire is a wire formed by connecting two or more single coated wires in a flat manner.

As mentioned above, the raw material of the coating of the conventional unit coating wire was PVC. Since PVC is easily melted by a solvent and bonded together in a molten state, a chemical bonding method using a solvent has been used for joining unit-coated wires having a PVC material coating. However, as the use of chlorine-containing materials has recently been regulated due to environmental preservation, polyolefin materials such as polyethylene (PE) have begun to be used as a coating material for unit coating wires. However, polyolefin materials are chemically very stable and insoluble in solvents and the like. Therefore, the chemical melting and fusion method can no longer be used to bond a unit coated wire having a polyolefin material coating to form a ribbon-type connected wire.

The present invention has been made to solve the problems that may occur in the manufacturing process of the ribbon-type junction wire having a polyolefin material coating described above, the first object to be solved by the present invention is to use a chemical melting and fusion method An object of the present invention is to provide a method for manufacturing a ribbon-shaped connection wire that can mass-produce a ribbon-type connection wire.

A second problem to be solved by the present invention is to provide a method for manufacturing a ribbon-type connected wire that can prevent the conductor of the unit-covered wire from being pushed outwards during thermal bonding.

A third problem to be solved by the present invention is to provide a method for manufacturing a ribbon-type splice wire that can prevent the occurrence of beads or burrs on both sides of the splice wire.

A fourth problem to be solved by the present invention is to provide a method for manufacturing a ribbon-type spliced wire that can maintain a constant distance between conductors in the coating of the ribbon-type spliced wire.

The above-mentioned first task of the present invention is a molten state of the coating while heating the coating of the plurality of unit coating wires to the melting point or higher of the coating material in advance, and passing the heated unit coating wires through a pair of upper and lower heat rollers in an adjacent state. This is solved by thermally bonding the coatings while maintaining the thickness.

In the above-described second to fourth objects of the present invention, grooves through which unit-coated wires can pass are formed in the upper and lower heat rollers by the number of unit-coated wires, and formed on any one of the upper and lower heat rollers. The outermost of the grooves is solved by forming a resin blocking wall integrally with the heat roller, which can block the molten coating from being pushed out of the groove.

According to the present invention having the above-described configuration, it is possible to mass-produce a ribbon-type junction wire in a very fast process by using unit-covered wires having a chemically stable polyolefin material coating, and by a resin blocking wall integrally formed on a heat roller. As it can prevent the melt coating from being pushed or the conductor flowing in the melt coating, it can prevent the eccentricity of the conductor and the generation of beads and burrs that can occur during thermal bonding, and the distance between the conductors of the ribbon type connection wire is kept constant. It has a sustainable effect.

1 is an enlarged view of a unit coated wire used in the manufacture of a ribbon-type junction wire.
2A to 2C are enlarged views of the ribbon-type junction wire.
Figure 3a is a perspective view of a thermal bonding process showing a ribbon-type junction wire manufacturing method according to a first embodiment of the present invention.
3B is a cross-sectional view taken along the line AA ′ of FIG. 3A.
3C is an enlarged view of a portion “B” of FIG. 3B.
Figure 4a is a perspective view of a thermal bonding process showing a ribbon-type junction wire manufacturing method according to a second embodiment of the present invention.
4B is a cross-sectional view taken along the line CC ′ in FIG. 4A.
4C is an enlarged view of portion “D” of FIG. 4B.
5 is a manufacturing process diagram of the ribbon-type junction wire according to the present invention.

Hereinafter, with reference to the accompanying drawings, it will be described in detail a specific embodiment of the manufacturing method of the ribbon-type connected wire according to the present invention.

First Embodiment

First, referring to FIG. 5, in the process of manufacturing a ribbon-type junction wire according to the present invention, a unit-coated wire 1 forming step 100 of forming a unit-covered wire 1 by extruding a polyolefin material on a conductor surface, Immediately before the pay off step 101 of winding the unit coated wire 1 corresponding to the required number of joints into the bobbin and supplying the unit coated wire 1 to the heat rollers 9a and 9b. The coating heating step 102 of heating the coating of the unit coating wire 1 to 0.01 ° C to 20 ° C higher than the melting point of the coating material or the melting point of the coating material and the heated unit coating wires 1 are brought into close proximity to each other to The thermal bonding step 103 for thermally bonding the unit-covered wires 1 with a pair of upper and lower heat rollers 9a and 9b while passing through the heat rollers 9a and 9b for maintaining a molten state, and hot water (40 ° C). ~ 80 ° C) or cooling step 104 of cooling the thermally bonded unit-covered wires 1 while passing through cold water (10 ° C ~ 30 ° C) ), A pull-out step 105 for pulling the molded ribbon-shaped connection wires 3a, 3b, and 3c by the take-out roller, and a winding-up step 106 for winding up the drawn ribbon-type connection wire to the bobbin.

In the pay-off step 101, the unit-covered wires 1 are guided so that the temporary unit-covered wires 1 are adjacent to each other while paying off (that is, unwinding and supplying the wound wound on the bobbin, respectively). In the coating heating step 102, the coating is heated slightly higher than the melting point or melting point while passing the unit coating wires 1 inside the heater.

In the thermal bonding step 103, instantaneous melting and pressure welding of the coating are performed in the course of passing the unit coating wires 1 through the upper and lower thermal rollers 9a and 9b. In order to maintain the molten state of the coating, the surface temperature of the heat rollers 9a and 9b is preferably equal to or slightly higher (about 0.01 to 10 ° C) than the melting temperature of the coating material, but is not necessarily limited thereto. In the thermal bonding step 103, the present invention, the thermal bonding by the heat rollers (9a, 9b) as shown in Figures 3a to 3c in order to bond the polyolefin material unit coated wire to produce a ribbon-type connection wire Use the method. A plurality of grooves 11 are formed on the outer circumferential surfaces of the heat rollers 9a and 9b in order to improve heat transfer to the surface of the unit coated wire 1. Since the coating of the unit coating wires 1 is a thermoplastic polyolefin resin, the skin is temporarily melted when passing through the heat roller and the pressing force of the upper and lower heat rollers 9a and 9b acts to melt and press weld.

Second Embodiment

According to the first embodiment, it is possible to produce a large amount of polyolefin-covered ribbon-type junction wire in a rapid process, but the following problems may be caused.

First of all, when the ribbon-type connection wire is manufactured by the thermal bonding method using the heat rollers shown in FIGS. 3A to 3C, the conductor of the unit coated wire may be eccentrically pushed outwards during the thermal bonding. In order to thermally bond with a heat roller, the upper heat roller 9a and the lower heat roller 9b should be pressed at a pressure close to each other in a state where the coating of the unit coating wire to be joined is molten, in which case the conductor flows in the coating. It can displace while causing eccentricity. When the conductor is eccentric, the conductor may be partially exposed to the outside of the sheath during the manufacturing of the splice wire, and the conductor may be exposed to the outside of the sheath due to the bending of the splice wire even when the spliced wire is made into a harness or the like. This can lead to serious quality problems of the splice wires. In addition, when the eccentricity of the conductor occurs, the gap between the conductors in the connection wire is not constant, it may also cause a disadvantage that the automatic removal process of the coating, the automatic insertion process of the conductor, etc. for connecting the connector.

In addition, when manufacturing a ribbon-type junction wire by a thermal bonding method using a heat roller, beads or burrs may occur on both sides of the junction wire. Beads or burrs may occur upon compression by the heat rollers 9a and 9b, which are grooves 11 when the bead has more grooves than the number of empty unit-coated wires passing through. The molten coating may be partially pushed into the burr, and the burr may be caused by partially pushing the molten coating into a gap between the upper thermal roller 9a and the lower thermal roller 9b. When beads and burrs occur, the process of removing the beads and burrs must be further performed, which leads to complicated manufacturing process and high manufacturing cost. There is a risk of exposing the conductor to the outside of the sheath during the removal of beads or burrs.

In the second embodiment of the present invention illustrated in FIGS. 4A to 4C, the groove 11 through which unit-coated wires pass through the upper and lower sets of heat rollers 9a and 9b has a problem. ), And a resin blocking wall capable of blocking the molten coating from being pushed out of the groove 11 on the outermost side of the grooves 11 formed in any one of the upper and lower sets of thermal rollers 9a and 9b. It solved by forming (5) integrally with a heat roller. As shown in FIGS. 4A to 4C, when the resin blocking wall 5 is formed on the lower row roller 9b, the recess 7 coupled to the resin blocking wall 5 is formed in the upper row roller 9a. It forms along the outer peripheral surface of a roller. By doing so, it is possible to prevent the melt coating from being pushed or to prevent the conductor from flowing in the melt coating, thereby preventing the occurrence of eccentricity of the conductor and the generation of beads and burrs, which may occur during thermal bonding, and the gap between the conductors of the ribbon-type connection wire. It is effective to keep the constant.

Although the present invention has been described with reference to the embodiments shown in the accompanying drawings, the scope of protection of the present invention is not intended to be limited thereto, and the scope of protection of the present invention is set forth in the detailed description of the claims and all equivalent embodiments thereof. It should be interpreted as crazy.

1: unit coated wires 3a, 3b, 3c: ribbon type connection wire
5: resin barrier wall 7: groove
9a, 9b: heating roller 11: groove

Claims (2)

A unit for winding the unit coated wire (1) forming the unit coated wire (1) by extruding a polyolefin material on the surface of the conductor and forming the unit coated wire (1), and the unit wound wire (1) corresponding to the required number of splices. Immediately before the pay off step 101 and the unit-covered wire 1 is introduced into the heat rollers 9a and 9b, the coating of the unit-covered wire 1 is 0.01 ° C from the melting point of the coating material or the melting point of the coating. The upper and lower sets of heat while passing through the heating step 102 for heating the substrate heating wires 102 and the heated rollers 9a and 9b for maintaining the molten state of the coating by bringing the heated unit coating wires 1 close to each other. A thermal bonding step 103 for thermally bonding the unit coated wires 1 with rollers 9a and 9b, a cooling step 104 for cooling the unit coated wires 1 that are thermally bonded while passing water, A drawing step 105 which pulls the molded ribbon-shaped connection wires 3a, 3b, and 3c by the drawing roller, and the drawn ribbon connection. And a winding step (106) of winding the wire to the bobbin.
The method of claim 1,
The top and bottom row rollers 9a and 9b form grooves 11 through which the unit coated wires 1 can pass, as many as the unit coated wires 1, and the top and bottom row rollers 9a and 9b. Ribbon on the outermost side of the grooves (11) formed in any one of the) is formed with a resin blocking wall (5) integrally formed with the heat roller (9a, 9b) that can block the molten coating from being pushed out of the groove Method of manufacturing a type junction wire.

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