JPH05184036A - Manufacture of protector for wire harness - Google Patents

Abstract

PURPOSE:To provide a manufacture which supplies, at low composite cost, a wire harness protector which sticks fast to the winding part of the wire harness, so as to surely protect the mounting part of the wire harness installed on a machine, a vehicle, or the like. CONSTITUTION:This protector is so constituted as to protrude an elastic material 2a at high temperature and at high pressure out of a nozzle 1 of an injection molding machine, and harden it, lowering the temperature while pulling it, bringing it into contact, in spiral shape, with the periphery of a cylinder 5 inside the cooling bath 4 positioned in front of the nozzle 1, and wind it around a winding shaft 6, whereby a protector material fitted with curling is manufactured, and this material is cut according to the circumference of a wire harness, thus a manufacture of a wire harness protector for manufacturing a low-cost protector high in adhesion is gotten.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a manufacturing method for supplying a wire harness protector closely attached to a winding portion of a wire harness at a low cost.

[0002]

2. Description of the Related Art Conventionally, as a material for a wire harness protector, a long strip E (FIG. 5) having a channel-shaped cross section having flanges on both edges has been manufactured and supplied. This band-shaped material is cut to a length equivalent to the outer circumference of the wire harness to be attached, and then wrapped around the wire harness.
The method of winding the tape and fixing it with the clamp metal fittings j has been used. However, when winding a straight protector material cut without bending the nose, as shown in FIG. 7, the joint opens near the flanges on both sides and the mouth opens. There was a drawback that the phenomenon occurred.

As shown in FIG. 4, in the manufacturing apparatus for the protector material E (FIG. 5), the high temperature material extruded from the nozzle a is solidified into a band shape while passing through a straight water tank c containing cooling water and wound. It is taken up by the take-up machine d. When this strip-shaped material E is cut into the wire harness outer peripheral length, wound, and attached by the clamp j, as shown in FIG. 7, even if the tape h is strongly wound and pressed, i at both ends is opened and the wire harness is damaged. In addition, due to the elasticity of the strip E to return to a straight line, the tape h gradually extends to open the connection part and loosen the fixing of the wire harness, which causes a quality problem. .

In order to eliminate this drawback, the wire harness h
Protectors having different inner diameters in a stepwise manner so as to fit the outer diameters d ₁ and d _2, etc. of the molded article K, for example.
A method has been adopted in which the series according to size (Fig. 6) is systematically manufactured, kept in stock, selected according to the outer diameter of the wire harness, and attached with the clamp j.

The outer diameter of the wire harness varies depending on the type of wire to be manufactured, and even with the same wire harness, the diameter changes with each branch, so that molded products with an extremely large number of inner diameters can be manufactured. Since it is necessary, the management cost such as production planning, ordering, manufacturing, inventory, delivery by size, selection and use, etc., causes a very high total cost.

[0006]

An object of the present invention is to provide a protector which eliminates the above-mentioned drawbacks and provides a protector of high quality which firmly adheres to a wire harness and which has a low total cost in the whole production process. To provide a method.

[0007]

In order to achieve the above object, in the present invention, an elastic material such as rubber or plastic is supplied from a nozzle of a channel mold section of an injection molding machine,
It is pushed out at a high temperature and a high pressure, and while being helically in contact with the outer surface of the cylindrical body in the cooling water tank installed in front of the nozzle while pulling, it is moved in the axial direction of the cylinder to lower the temperature and solidify, and then wound up. It is characterized in that it is configured to be wound up on a machine.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A method of manufacturing a protector according to the present invention will be specifically described below with reference to the drawings.

Here, FIG. 1 is a continuous manufacturing apparatus of a curling protector material, and FIG. 2 is an explanatory perspective view of a protector made by cutting the curling material according to the outer peripheral length of a wire harness. .

In FIG. 1, while cooling the high-temperature plastic material 2a extruded from the injection nozzle 1 having the channel-shaped nozzle holes of the injection molding machine with the cooling water ejected from the cooling nozzle 3, the direction of extrusion of the plastic is almost the same. While being in contact with the cooled outer peripheral surface 4a of the cylindrical body 5 provided in the cooling water tank 4 at a right angle, it is spirally pulled toward the winder side to be cooled, and with a curvature equivalent to the outer diameter dimension of the cylindrical body. This is a manufacturing method in which the belt-shaped material 2c, which is solidified and curled, is wound around the winder shaft 6 on the side of the cylindrical body in a belt-like shape and cut to form the protector 2.

Since the protector strip 2c manufactured by this manufacturing apparatus is curled to have a curvature radius r substantially equal to the circular radius r of the cylindrical body 5, the outer circumference of the wire harness is slightly larger than this curvature radius. The protector (FIG. 2) cut in accordance with the length dimension is rounded to a radius r by curling, and both ends 2e are also bent to the radius r.

When the curled protector 2 is opened and attached to the wire harness, the curl protects the wire harness and hugs the wire harness firmly. Moreover, since the nose is bent, the connection portion also comes into close contact with the protector. Therefore, the mouth opening phenomenon i as shown in FIG. 7 does not occur at all.

In the protector 2 manufactured by this method, even if the outer diameter of the wire harness changes to a certain extent, the curling force of the protector 2 bites the outer circumference of the wire harness. Since it is possible to cope with a change in the outer diameter of the wire harness to a considerable extent by changing the above, it is sufficient in production to prepare the cylindrical body 5 having the outer diameter gradually reduced.

The cylindrical body 5 shown in FIG. 1 may use a grooved cylindrical body 7 having a spiral groove 7a as shown in FIG.

Also, instead of the spiral grooved cylindrical body 7, a spiral guide cover (not shown) may be provided on the outside of the grooveless cylindrical body 5 to obtain the same operation.

[0016]

As described above, the wire harness protector produced by the protector material manufacturing apparatus of the present invention has a high quality protector performance because it is bitten and closely adhered to the wire harness by curling, and also has a common size. Since the width is wide, it is possible to support a wide variety of products, which reduces the manufacturing cost. Since all you have to do is prepare the materials, various management costs for all processes such as manufacturing, inventory, and assembly will be greatly reduced.

[Brief description of drawings]

FIG. 1 is an explanatory perspective view of a manufacturing apparatus used in the present invention,

2 is a perspective view of a protector made by cutting the protector material manufactured by the manufacturing apparatus of FIG. 1;

FIG. 3 is a perspective view of a cylindrical body provided with a spiral groove in the manufacturing apparatus,

FIG. 4 is an explanatory perspective view of a conventional protector material manufacturing apparatus,

5 is a perspective view of a belt-shaped protector material manufactured by the manufacturing apparatus of FIG.

FIG. 6 is a perspective view for explaining a mounting state of a molded article protector,

FIG. 7 is an explanatory perspective view of a mouth opening state when the band-shaped protector material of FIG. 5 is cut and wound around a wire harness.

[Explanation of symbols]

 1 Injection molding machine extrusion nozzle 2 Protector product 2c Curling strip 3 Cooling water nozzle 4 Cooling water tank 5 Cylindrical body 6 Winder shaft 7 Grooved cylindrical body

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[Procedure amendment]

[Submission date] April 10, 1991

[Procedure Amendment 1]

[Document name to be amended] Statement

[Correction target item name] 0010

[Correction method] Change

[Correction content]

In FIG. 1, while cooling the high-temperature plastic material 2a extruded from the injection nozzle 1 having the channel-shaped nozzle holes of the injection molding machine with the cooling water ejected from the cooling nozzle 3, the direction of extrusion of the plastic is almost the same. While being in contact with the cooled outer peripheral surface 5a of the cylindrical body 5 provided in the cooling water tank 4 at a right angle, it is spirally pulled toward the winder side to cool it, and with a curvature equivalent to the outer diameter of the cylindrical body. This is a manufacturing method in which the belt-shaped material 2c, which is solidified and curled, is wound around the winder shaft 6 on the side of the cylindrical body in a belt-like shape and cut to form the protector 2.

Claims (1)

[Claims] 1. An elastic material such as rubber or plastic is heated at a high temperature from a nozzle having a channel-shaped cross section of an injection molding machine.
It is extruded with high pressure, while it is pulled while making spiral contact with the outer surface of the cylindrical body in the cooling water tank installed in front of the nozzle, it is moved in the cylindrical axial direction to lower the temperature and solidify, and then wound on the winder. A method for continuously manufacturing a protector for a wire harness having curling with flanges on both edges, which is configured to be taken.