JPH10188694A - Manufacturing device and manufacture of wire-wound noise-prevention resistance wire - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a device and a method for manufacturing a wire-wound noise-prevention resistor wire, by which a resistance wire can be coiled on a core under good conditions by preventing deformation and bonding of the core comprising a center reinforcing core covered with an unvulcanized fluororubber mixture. SOLUTION: A device for manufacturing a wire-wound noise-prevention resistor wire includes a core forming device 1 in which a fluororubber blend mixed with a magnetic substance is extruded over a center reinforcing core 7a while unvulcanized to form a core 7a, which in turn naturally drops into a pack 23 to store it; a coiling device forming a coil core by drawing the core 7c out from the pack 23 and winding a resistance wire on the core 7c while burying it into the outer peripheral surface of the core 7c, and an insulating layer forming device forming an insulating layer on the outer peripheral surface of the coil core and vulcanizing the coil core. The core forming device 1 includes a taking machine 21 taking the core 7c via an extruder 13 and a cooling vessel 15 from a supply reel 11 on which the center reinforcing core 7a is wound, and storing the core 7c in the pack 23.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus and a method for manufacturing a wire-type noise prevention resistance wire (hereinafter simply referred to as "wire") used in an ignition system of an automobile engine.

[0002]

2. Description of the Related Art An electric wire of this type includes a core formed by extrusion-coating a fluoro rubber mixture mixed with a magnetic material on a central reinforcing core formed by twisting aramid fibers and the like, It is provided with a resistance wire wound while being embedded in the outer peripheral surface of the core, and an insulating layer and the like covering the winding core from above the wound resistance wire. When the resistance wire is wound around the outer periphery of the core, the fluororubber compound is extrusion-coated on the central reinforcing core in an unvulcanized state so that the resistance wire sinks into the outer peripheral surface of the core. Vulcanization is performed after the winding of the resistance wire around the core, so that the resistance wire is wound at a uniform pitch without displacement and embedded in the winding core at a uniform depth. It has become.

A conventional manufacturing apparatus for manufacturing such an electric wire is disclosed in Japanese Patent Publication No. 5-42084. In this manufacturing apparatus, in a core forming step, a core formed by extrusion-coating a fluororubber compound in an unvulcanized state on a central reinforcing core is wound around a bobbin. Then, in the next coil winding core forming step, the winding core is pulled out from the bobbin, and the winding process of the resistance wire is performed.

[0004]

However, the core has a non-vulcanized state of the fluororubber compound in the outer layer, which easily causes deformation of the core and adhesion between the cores. In the configuration in which the winding core is wound around the bobbin as in above, there is no problem if the resistance wire is wound around the winding core immediately after winding the bobbin, but the winding core is wound around the bobbin. There is a problem that the core wound on the bobbin deforms and sticks when left for a long period of time in the state of being pressed. The deformation and adhesion occur because the cores wound on the bobbin are pressed against each other with a strong pressure, and the degree of the deformation and the adhesion increases as the lower part of the core becomes wound.

When sticking of the core occurs, when the core is pulled out from the bobbin, the sticking cores may be forcibly separated from each other, and the fluororubber compound in the adhesive portion may be peeled off.
When the core is deformed, variations occur in the coil winding pitch of the resistance wire and the depth of the resistance wire embedded in the outer periphery of the core in the coil winding step. If the coil winding pitch of the resistance wire is disturbed, contact between the resistance wires between the turns of the coiled adjacent resistance wire or the like occurs, and a predetermined inductance value cannot be obtained. Performance decreases.

In view of the above problems, the present invention prevents deformation and sticking of a core formed by coating a center reinforcing core with an unvulcanized fluororubber mixture, and provides good resistance to the core. It is an object of the present invention to provide a manufacturing apparatus and a manufacturing method of a wire-wound noise-prevention resistance wire that can perform coil winding of a wire.

[0007]

The technical means for achieving the above object is to extrude, in an unvulcanized state, an unvulcanized fluororubber compound containing a magnetic substance on a central reinforcing core continuously fed. A core forming means for forming a core by forming the core, continuously dropping the core into the container naturally, and pulling out the core from the container, and winding a resistance wire on the core. A coil winding means for forming a coil core by being wound while being embedded on the outer peripheral surface of the core; and forming an insulating layer for forming an insulating layer on the outer peripheral surface of the coil core and vulcanizing the coil core. Means.

In addition, a core is formed by extrusion-coating a non-vulcanized fluororubber compound containing a magnetic material on a center reinforcing core that is continuously fed to form a core. A core forming step of allowing the coil to be naturally dropped and accommodated in a container, and winding the core while pulling the core out of the container and winding a resistance wire on the core while embedding a resistance wire on the outer peripheral surface of the core. A coil winding step of forming; and an insulating layer forming step of vulcanizing the coil core while forming an insulating layer on the outer peripheral surface of the coil core.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An apparatus for manufacturing a wire-type noise prevention resistance wire according to an embodiment of the present invention includes a core forming device 1 (core forming means) shown in FIG. 1 and a coil winding device shown in FIG. 3 (coil winding means), the insulating layer forming apparatus 5 (insulating layer forming means) shown in FIG. 3, and the like. FIG. 4 shows the configuration of the electric wire (winding type noise prevention resistance wire) 7 manufactured by this manufacturing apparatus.

[0010] First, the core forming device 1 is provided with a magnetic material such as ferrite powder on a center reinforcing core 7a formed by twisting three aramid fibers or glass fibers. The core 7c is formed by extrusion-coating a fluororubber compound 7b into which the powder is injected, and the supply reel 11 around which the center reinforcing core 7a is wound, and the supply reel 1
An extruder 13 for extruding and coating an unvulcanized fluororubber compound 7b on a central reinforcing core 7a continuously fed from 1 and a cooling tank for cooling a core 7c formed by the extruder 13. 15 and a take-up device 21 that takes out the core 7 c through the extruder 13, the cooling tank 15 and the capstans 17 and 19. The core 7c taken up by the take-up machine 21 is continuously dropped naturally into a bottomed cylindrical pack 23 (container), and the fluoro rubber compound 7 in the outer layer portion is dropped.
b is accommodated in an unvulcanized state.

The fluororubber compound 7b is obtained by mixing ferrite powder with fluororubber at a ratio of 400 parts by weight of ferrite powder to 100 parts by weight of fluororubber. The extrusion temperature of the object 7b is 100 ° C., and the cooling temperature in the cooling bath 15 is 20 ±
The storage temperature of the core 7c stored in the pack 23 is 25 to 28 ° C. As shown in FIG. 5, the take-up roller 21a of the take-up machine 21 has a core 7c
A groove 21b into which the groove 21b fits is formed.
Is set to 0.7 or more so that the winding core 7c is not damaged.

When the core 7c is formed by the core forming device 1, a resistance wire 7d such as a nichrome wire is spirally wound horizontally around the outer periphery of the core 7c by the coil winding device 3 to form a coil core 7e. It is formed.

[0013] The coil winding device 3 includes a resistance wire 7
and a first to fourth capstans 35 and 37 which draw out the core 7c from the pack 23 and feed the coil winding machine 31 upward and downward to the reel 33 on the winding side. , 39, 41.
The coil winding machine 31 includes a bobbin 3 around which the resistance wire 7d is wound.
1a and the resistance wire 7d rotating around the core 7c
and a guide portion 31b for winding a coil around the outer periphery of the coil c.

When the resistance wire 7d is wound around the outer periphery of the core 7c by the coil winding machine 31, the fluoro rubber compound 7b on the outer periphery of the core 7c is in an unvulcanized state. The core 7c is appropriately fitted into the outer peripheral surface. The coil core 7e thus formed is
Is wound on a reel 33.

An insulating layer 7f is formed on the outer periphery of the coil winding core 7e formed by winding the coil by the coil winding device 3 by the insulating layer forming device 5. The insulating layer forming apparatus 5 includes an extruder 51 that extrudes EP rubber or the like onto the outer periphery of the coil core 7 e sent from the reel 33 to form an insulating layer 7 f and a coil core 7 e that has passed through the extruder 51. And a steam vulcanizing tube 53 for performing a sulfurizing treatment.

The temperature inside the steam vulcanizing tube 53 is set to 200 ° C., and the coil core 7 e insulated therein is covered with the coil.
Passes over about 40 seconds, whereby the insulating layer 7f (EP rubber) on the outer peripheral portion and the fluorine rubber compound 7b inside are simultaneously vulcanized. Vulcanized coil core 7e
Is wound on a reel 55.

The vulcanized coil core 7e includes:
Furthermore, the braid 7g and the protective sheath 7h are sequentially coated on the insulating layer 7f by another device (not shown), and the electric wire 7 is formed.

As shown in FIG. 4, the electric wire 7 thus formed is removed from the coil core 7e by removing the insulating layer 7f, the braid 7g, and the protective sheath 7h at the ends thereof for connecting terminal fittings. Is exposed and the terminal treatment is performed. Then, the exposed coil core 7 e is connected to the protective sheath 7.
h, and the terminal fitting is crimp-connected. Since the resistance wire 7d is embedded in the outer peripheral surface of the core 7c,
At the time of the terminal treatment of the electric wire 7 and the connection work of the terminal fitting,
The resistance wire 7d is not loosened.

As described above, according to the present embodiment, the winding core 7 whose outer layer portion is made of the unvulcanized fluororubber compound 7b
Since c is stored in the pack 23, a strong pressure such as when wound on a bobbin is not applied to the core 7c, and even when the state of being stored in the pack 23 is extended, the deformation of the core 7c and Sticking can be prevented. Therefore, the core 7c
The resistance wire 7d can be wound in a good condition, and the resistance wire 7d can be wound around the winding core 7c at a uniform pitch and embedded at a uniform depth.

Hereinafter, the core 7c in the case where the core 7c is housed in the pack 23 and the case where the core 7c is wound around a bobbin will be described.
Shows the magnitude of the pressure applied to. Here, the outer diameter is 1.3m
m, a core 7c having a length of 1000 m,
Or consider the case of housing in a bobbin.

As shown in FIG. 6, when the core 7c of 1000 m is accommodated in a pack 23 having an inner diameter A of 25 cm, the cross-sectional area of the pack 23 is (25/2) ² × 3.14 =
490 (cm ² ) and the weight of the core 7 c of 1000 m is 4 kg, so that the pressure applied to the core 7 c of the lowermost part 61 in the pack 23 is about 4/490 = 0.01 (k)
gf / cm ² ).

On the other hand, as shown in FIG.
When the core 7c of 000 m is wound on a bobbin 63 having an outer diameter B of 30 cm and a width C of 30 cm while giving a tension of 3 kgf, the core 7c is wound into four layers, and the core is wound per layer. Since the pressure applied to the core 7c is 1 kgf / cm ² , the pressure applied to the core 7c of the wound lowermost layer 65 is approximately 1 kgf / cm ^2.
× 4 = 4 (kgf / cm ² ).

From this, it can be seen that the pressure applied to the winding core 7c can be greatly reduced by storing it in the pack 23 rather than winding it on a bobbin.

[0024]

As described above, according to the present invention, since the core made of the unvulcanized fluororubber compound in the outer layer portion is naturally dropped and stored in the container, it can be used as in the case of winding on a bobbin. Even when a strong pressure is not applied to the core and the container is stored in the container for a long time, deformation and adhesion of the core can be prevented. Therefore, the coil of the resistance wire can be wound around the core in a favorable condition, and the resistance wire can be wound around the core at a uniform pitch and embedded at a uniform depth. In addition, a reduction in the noise prevention performance of the electric wire can be prevented.

[Brief description of the drawings]

FIG. 1 is a diagram showing a configuration of a core forming apparatus provided in a manufacturing apparatus for a wire-type noise prevention resistance wire according to an embodiment of the present invention.

FIG. 2 is a diagram showing a configuration of a coil winding device provided in the manufacturing apparatus of the wound type noise prevention resistance wire according to one embodiment of the present invention.

FIG. 3 is a diagram illustrating a configuration of an insulating layer forming apparatus provided in the apparatus for manufacturing a wire-type noise prevention resistance wire according to one embodiment of the present invention.

FIG. 4 is a sectional view of a wire-type noise prevention resistance wire.

FIG. 5 is a side view of a take-up roller of a take-up machine provided in the core forming apparatus of FIG. 1;

FIG. 6 is a view showing a state in which a core formed by the core forming apparatus of FIG. 1 is accommodated in a pack.

FIG. 7 is a view showing a state where a core is wound around a bobbin in a conventional manufacturing apparatus.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 winding core forming device 3 coil winding device 5 insulating layer forming device 7 wire wound noise prevention resistance wire 7 a center reinforcing core 7 b fluoro rubber compound 7 c winding core 7 d resistance wire 7 e coil winding core 7 f insulating layer 23 pack

Claims (2)

[Claims] 1. On a central reinforcing core which is continuously fed,
A core forming means for extruding and coating a fluororubber compound mixed with a magnetic material in an unvulcanized state to form a core, and continuously and naturally dropping the core into a container to accommodate the core; A coil winding means for extracting a core from the inside of the container, winding a resistance wire on the core while embedding the resistance wire on the outer peripheral surface of the core, and forming a coil core; An apparatus for manufacturing a wire-type noise prevention resistance wire, comprising: an insulating layer forming means for forming an insulating layer and vulcanizing the coil core. 2. On a central reinforcing core which is continuously fed,
A core forming step in which a core is formed by extrusion coating and molding a fluororubber compound mixed with a magnetic material in an unvulcanized state, and the core is continuously dropped naturally and accommodated in a container; A coil winding step of extracting a core from the inside of the container, winding a resistance wire on the core while embedding the resistance wire on the outer peripheral surface of the core, and forming a coil core; Forming an insulating layer and vulcanizing the coil core.