JP2001006467A - Mold for manufacturing wire harness integral grommet and manufacture of wire harness integral gromment using the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a mold for manufacturing wire harness integral grommet capable of performing automatic billing and simplifying a structure of mold releasing facility. SOLUTION: This mold for manufacturing a wire harness integral grommet consists of an upper mold 23 and a lower mold 24 which are provided by opposing wire harness through grooves 21, 22 along a horizontal divided face 20 abutted in the vertical direction, respectively, and mold an outer face of the grommet mainly and a first intermediate mold 29 and a second intermediate mold 30 which are provided with wire harness through grooves 26, 27 along a vertical divided face 25 abutted in the horizontal direction, respectively, mold an inner face of the grommet mainly, and are fitted and positioned in a storage space 28 in the upper mold 23 and the lower mold 24 so that mutual wire harness through grooves 21, 22, 26, 27 are aligned.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mold for manufacturing a wire harness integrated grommet in which a funnel-shaped grommet is integrally formed with a wire harness, and a method of manufacturing a wire harness integrated grommet using the mold. .

[0002]

2. Description of the Related Art In a wire harness for an automobile,
A wire harness is passed through a through hole of a partition such as a dash panel that separates an outdoor room such as an engine room from a room such as an operation room, and a grommet provided on the wire harness is fitted. Water is prevented from entering through the holes.

[0003] The grommet is prepared in a process different from that of the wire harness, and the grommet is opened by a grommet opening jig and mounted through the wire harness, or the grommet is mounted before the connector is mounted. Was passed through the hole of the grommet, and then the connector was attached to the wire harness.

Further, in order to prevent water from entering the room along the wire harness, urethane resin is injected into the grommet after the wire harness is attached to the grommet attached to the wire harness, and the grommet is flooded from between the wires. I was trying to block.

[0005] Such a current grommet requires not only complicated mounting work to a wire harness but also a step of injecting a urethane resin for stopping water after mounting the grommet. However, there was a problem that it became very expensive.

In view of such problems, a technique has been developed in which a grommet made of urethane is integrally formed on the outer periphery of a wire harness.

In the method of manufacturing the wire harness integrated grommet, as shown in FIG. 4, the wire harness through grooves 3 and 4 are opposed to each other along the horizontal dividing surface 2 which is abutted from above and below as the grommet forming die 1. A first upper die 5 and a first lower die 6 which are respectively provided to mainly form the outer surface of the grommet, and wire harness through grooves 8, 9 (wires) along a horizontal dividing surface 7 which is abutted from above and below. The harness through-grooves 8 are not shown in this figure, but are shown in FIG. 5 (E) showing the operation to be described later.) A second upper mold 10 and a second lower mold 11 positioned with respect to the first upper mold 5 and the first lower mold 6 such that the through grooves 3, 4, 8, 9 are aligned. Used. The distal ends of the second upper mold 10 and the second lower mold 11 have protrusions 10a and 11a inserted into the first upper mold 5 and the first lower mold 6, respectively. The upper die 5, the first lower die 6, the second upper die 10, and the second lower die 11 form a funnel-shaped die space 12. The first upper mold 5 is provided with a resin injection port 13 for supplying a molten resin from the outside into the mold space 12. Sealing members 14 and 15 for closing the small-diameter end of the funnel-shaped mold space 12 are provided at the outward ends of the wire harness through grooves 3 and 4.
Are provided opposite to each other. Sealing members 17 and 18 for closing the outer periphery of the wire harness 16 penetrating the inner bottom surface of the large-diameter opening in the funnel-shaped mold space 12 are provided in the wire harness through grooves 8 and 9 (the seal member 18 is shown in FIG. Although not shown, it is shown in FIG.

Next, a method of manufacturing a conventional wire harness-integrated grommet in which a funnel-shaped grommet is integrally formed on the wire harness 16 using such a grommet molding die 1 will be described with reference to FIG. ) To (E).

As shown in FIG. 4, the first lower mold 6 and the second lower mold 11 are combined to form a wire harness through groove 4,
A wire harness 16 is set on the substrate 9, and the first upper die 5 and the second upper die 10 are put on the wire harness 16, so that the state shown in FIG. In this state, the molten urethane resin is injected into the mold space 12 from the resin injection port 13 to form a grommet.

After curing of the formed grommet,
As shown in (B), the first upper mold 5 is lifted upward and released from the grommet 19. Thereby, a part of the formed grommet 19 is exposed.

Next, as shown in FIG. 5C, the second upper mold 10 is moved in the longitudinal direction of the wire harness 16 and released from the grommet 19. Thus, the upper half of the formed grommet 19 is exposed.

Next, as shown in FIG. 5D, the second lower mold 11 is moved in the longitudinal direction of the wire harness 16 and released from the grommet 19. Thereby, a part of the lower half of the formed grommet 19 is exposed.

Finally, as shown in FIG. 5E, the first lower mold 6 is moved downward to be released from the grommet 19. Thus, the entire formed grommet 19 is exposed.

According to the method of manufacturing such a wire harness integrated grommet, it is expected that the grommet price including the number of assembling steps can be significantly reduced.

[0015]

However, in such a conventional method of manufacturing a wire harness-integrated grommet, the grommet 19 has a funnel shape because it is attached to a through hole of a partition such as a dash panel. In the case of molding with a urethane resin having an inferior elongation rate than rubber, the first upper mold 5, the first lower mold 6, the second upper mold 10, and the second lower mold are required for the releasing operation after the urethane resin is cured. 11 needs to be slid vertically and horizontally with respect to the wire harness 16. For this reason, in order to produce automatic injection and release equipment, it is necessary to move the mold 1 divided into four parts in the vertical direction and the horizontal direction, which causes a problem that the system becomes complicated and large. Further, in order to mount the grommet 19 at a desired position on the wire harness 16, it is necessary to install a large wire harness 16 at an accurate position on the mold 1, but conventionally, it has been difficult to position the wire harness 16.

An object of the present invention is to provide a mold for manufacturing a wire harness-integrated grommet and a method for manufacturing a wire harness-integrated grommet using the same, which can simplify the structure of automatic injection and release equipment. It is in.

Another object of the present invention is to provide a mold for manufacturing a wire harness-integrated grommet that can easily position the wire harness with respect to the mold, and a method of manufacturing a wire harness-integrated grommet using the same. .

[0018]

SUMMARY OF THE INVENTION The present invention is to improve a mold for manufacturing a wire harness-integrated grommet in which a funnel-shaped grommet is integrally formed with a wire harness.

In the mold for manufacturing a grommet integrated with a wire harness according to the present invention, wire harness through grooves are provided so as to face each other along a horizontal divided surface which is abutted from above and below, and mainly forms the outer surface of the grommet. The upper and lower dies and the wire harness through-grooves are provided along the vertical division surface abutted from the horizontal direction, respectively, so that the inner surface of the grommet is mainly formed and the upper and lower dies are aligned so that the mutual wire harness through-grooves are aligned. It is composed of a first middle mold and a second middle mold that are fitted and positioned in the accommodation spaces in the mold and the lower mold.

In such a mold for manufacturing a wire harness-integrated grommet, the first and second dies include:
It is preferable that a large-diameter end portion of the mold space is closed, and a positioning flange portion for positioning the first and second middle molds with respect to the upper mold and the lower mold is protruded.

The present invention also improves a method of manufacturing a wire harness-integrated grommet in which a grommet molding die is set in a wire harness, and a resin is filled in the grommet molding die to integrally mold a funnel-shaped grommet. Things.

In the method of manufacturing the wire harness integrated grommet according to the present invention, the above-described structure of the present invention is used as a grommet forming die.

First, a first middle mold and a second middle mold are set by abutting a predetermined portion of a wire harness on a vertical division surface.

Next, the first and second dies set in the wire harness are accommodated inside and the upper and lower dies are abutted and set on a horizontal dividing plane.

Next, a resin is filled in a mold space formed by the first and second middle dies and the upper and lower dies, and a funnel-shaped grommet is integrally formed.

Next, after the upper mold is released after the resin is cured,
The wire harness is removed from the lower die together with the first and second middle dies.

Thereafter, the first middle mold and the second middle mold are released to obtain a wire harness in which the grommet is integrally formed.

In the present invention, unlike the conventional one, it is only necessary to raise and lower the upper die, so that the structure of the automatic injection and release equipment can be simplified.

Further, the grommet mounting position with respect to the wire harness is determined by the set of the first medium size and the second medium size performed outside the automatic injection and release equipment.
Positioning with respect to the wire harness can be easily performed.

[0030] Further, the first medium-size and the second medium-size include:
Since the large-diameter end of the mold space is closed and the positioning flanges for positioning the first and second middle dies with respect to the upper die and the lower die are protrudingly provided, the positioning flange is used by using this positioning flange. The positioning of the upper die and the lower die with respect to the first and second middle dies can be easily performed. Further, since the positioning flange also serves as a means for closing the large-diameter end of the mold space, the structure of the mold can be simplified.

[0031]

FIG. 1 is an exploded perspective view showing an example of an embodiment of a wire harness integrated grommet manufacturing die according to the present invention, and FIG. 2 is a view showing the die of this example set in a wire harness. It is a top view showing the state where the upper mold was removed.

In the metal mold 1 for manufacturing a grommet integrated with a wire harness of the present embodiment, the wire harness through grooves 21 and 22 are provided so as to face each other along a horizontal division surface 20 which is abutted from above and below. The upper and lower dies 23 and 24 for forming the outer surfaces of the wire harnesses are provided with wire harness through grooves 26 and 27 along the vertical divisional surface 25 which is abutted from the horizontal direction. A first middle mold 29 and a second middle mold 30 which are fitted and positioned in the accommodation spaces 28 in the upper mold 23 and the lower mold 24 so that the wire harness through grooves 21, 22, 26, 27 are aligned. It is composed of

The first middle mold 29 and the second middle mold 30 are formed with protrusions 29a, 30 inserted into the upper mold 23 and the lower mold 24.
a, which are connected to the base ends of the protrusions 29a, 30a, respectively, close the large-diameter end of the mold space 12, and connect the first and second middle dies 29, 30 to the upper mold 23 and the lower mold 2 respectively.
4 and positioning flange portions 29b and 30b for positioning with respect to the position No. 4.

The upper mold 23, the lower mold 24, and the first middle mold 2
9, a funnel-shaped mold space 12 is formed by the second middle mold 30. The upper mold 23 is provided with a resin injection port 13 for supplying a molten resin from the outside into the mold space 12.

Positioning flanges 29b and 30b are fitted to the upper and lower dies 23 and 24 at the ends of the accommodation space 28, and the upper and lower dies 23 and 24, the first middle dies 29 and the second Positioning groove 31 for mutual positioning with the middle die 30
Are formed.

On one end side of the wire harness through-grooves 21 and 22 of the upper mold 23 and the lower mold 24, seal members 14 and 15 for closing small-diameter ends of the funnel-shaped mold space 12 are provided to face each other. Have been. First medium size 29, second medium size 3
In the wire harness through-grooves 26 and 27, the sealing member 14 that closes the upper surface of the large-diameter portion of the funnel-shaped mold space 12,
15 are provided opposite to each other.

Next, a funnel-shaped grommet 1 is attached to the wire harness 16 by using such a grommet molding die 1.
9 and FIG. 3 (A) in addition to FIG. 1 and FIG.
This will be described with reference to FIGS.

As shown in FIG. 3A, outside the upper mold 23 and the lower mold 24, a predetermined position of the wire harness 16
The first middle mold 29 and the second middle mold 30 are manually set from the horizontal direction.

Next, as shown in FIG. 3B, the first and second middle dies 29, 30 set on the wire harness 16 are formed.
Is fitted into the housing space 28 of the lower mold 24, and the positioning flanges 29 b, 30 b of the first and second middle dies 29, 30 are attached to the lower mold 2.
4 and the first and second middle dies 2
Position 9 and 30 with respect to lower mold 24.

Next, as shown in FIG.
The first and second middle dies 29 and 30 are fitted into the accommodation space 28 of the upper mold 23 by lowering the upper mold 23 and fitting the positioning flanges 29b and 29 of the first and second middle dies 29 and 30 to the upper mold 23. 30
The g is inserted into the positioning groove 31 of the upper die 23 to complete the grommet molding die 1 of this example. In this state, the upper mold 2
The molten urethane resin is injected from the resin injection port 13 into the mold space 12 formed by the third and lower molds 24, the first middle mold 29, and the second middle mold 30, and the grommet 29 is formed.

After the formed grommet 29 is cured, the upper die 23 is lifted upward and released from the grommet 19 as shown in FIG. Thereby, a part of the formed grommet 19 is exposed.

Next, as shown in FIG. 3 (E), the wire harness 16 is lifted up from the lower die 24 together with the formed grommets 19 and the first and second middle dies 29, 30, and the grommet 19 is lowered. Release from 24.

Next, as shown in FIG. 3F, the first and second middle dies 29, 30 are released from the grommet 19.
Thus, the entire formed grommet 19 is exposed.

In this example, unlike the conventional one, the upper mold 23
The structure of the automatic injection and release equipment can be simplified since only the vertical movement of the equipment is required.

The grommet mounting position with respect to the wire harness 16 is determined by the setting of the first and second molds 29 and 30 performed outside the automatic injection and release equipment, so that positioning with respect to the wire harness 16 is facilitated. It can be carried out.

Further, the first middle mold 29 and the second middle mold 3
In FIG. 0, positioning flanges 29b, 30b for closing the large-diameter end of the mold space 12 and for positioning the first and second middle dies 29, 30 with respect to the upper mold 23 and the lower mold 24 are provided. The positioning flanges 29b, 30b
The positioning of the upper die 23 and the lower die 24 with respect to the first and second middle dies 29 and 30 can be easily performed by using the above. In addition, since the positioning flanges 29b and 30b also function as means for closing the large-diameter end of the mold space 12, the structure of the mold can be simplified.

[0047]

In the mold for manufacturing a grommet integrated with a wire harness according to the present invention, the wire harness through-grooves are provided to face each other along a horizontal division surface abutted from above and below, and the outer surface of the grommet is mainly provided. An upper die and a lower die for molding the wire harness through-grooves are respectively provided along vertical division surfaces abutted from the horizontal direction so that the inner surface of the grommet is mainly formed and the mutual wire harness through-grooves are aligned. The first and second middle dies are fitted and positioned in the accommodating spaces in the upper and lower dies, so that the upper dies are raised and lowered during use unlike conventional ones. In this case, the structure of the automatic injection and release equipment can be simplified. Further, the grommet mounting position with respect to the wire harness 16 is determined by the setting of the first middle mold 29 and the second middle mold 30 performed outside the automatic injection and release equipment, so that the positioning with respect to the wire harness can be easily performed. .

[Brief description of the drawings]

FIG. 1 is an exploded perspective view showing an example of an embodiment of a wire harness-integrated grommet manufacturing die according to the present invention.

FIG. 2 is a plan view of the mold according to the present embodiment in a state in which a wire harness is set and an upper mold is removed.

FIGS. 3A to 3F are explanatory diagrams showing a process of using the mold of the present embodiment.

FIG. 4 is an exploded perspective view of a conventional mold for manufacturing a wire harness-integrated grommet.

FIGS. 5A to 5E are explanatory views showing a process of using a conventional mold.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 grommet forming die 2 horizontal division surface 3, 4 wire harness through groove 5 first upper die 6 first lower die 7 horizontal division surface 8, 9 wire harness through groove 10, 11 second upper die, lower die 10a, 11a Projecting portion 12 Mold space 13 Resin injection port 14, 15 Seal member 16 Wire harness 17, 18 Seal member 19 Grommet 20 Horizontal dividing surface 21, 22 Wire harness through groove 23 Upper mold 24 Lower mold 25 Vertical dividing surface 26, 27 Wire harness penetration groove 28 Housing space 29,30 First and second medium sized 29a, 30a Projection 29b, 30b Positioning flange 31 Positioning groove

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) // B29L 31:34

Claims (3)

[Claims] 1. A wire-harness-integrated grommet manufacturing mold for integrally molding a funnel-shaped grommet on a wire harness, wherein wire-harness through-grooves are provided so as to face each other along a horizontal dividing surface that is abutted from above and below. Upper and lower molds that mainly form the outer surface of the grommet, and wire harness through grooves are respectively provided along vertical dividing surfaces that are abutted from the horizontal direction, and mainly form the inner surface of the grommet and The wire harness is formed of a first middle mold and a second middle mold that are fitted and positioned in the accommodation spaces in the upper mold and the lower mold so that the through-grooves are aligned. Mold for manufacturing grommet with integrated wire harness. 2. The large-diameter end of the mold space is closed in the first and second molds, and the first and second molds are closed.
The mold for manufacturing a wire harness-integrated grommet according to claim 1, wherein a positioning flange portion for positioning the middle mold with respect to the upper mold and the lower mold is protruded, respectively. 3. A method of manufacturing a wire harness integrated grommet, wherein a grommet molding die is set in a wire harness, and a resin is filled in the grommet molding die to integrally mold a funnel-shaped grommet. As the mold, a wire harness penetration groove is provided facing each other along a horizontal division surface which is abutted from above and below, and an upper mold and a lower mold which mainly mold the outer surface of the grommet, and a vertical abutment from the horizontal direction. Wire harness through-grooves are respectively provided along the divided surface, and mainly form the inner surface of the grommet and in the accommodation space between the upper mold and the lower mold so that the wire harness through-grooves are aligned with each other. Using the first and second middle dies to be fitted and positioned, The second medium size is set at a predetermined position of the wire harness by abutting on the vertical division surface, and the first medium size and the second medium size set in the wire harness are accommodated therein. The upper mold and the lower mold are abutted and set on the horizontal dividing surface, and the resin is filled in a mold space formed by the first middle mold and the second middle mold and the upper mold and the lower mold. After integrally molding the funnel-shaped grommet, and after releasing the upper mold after curing of the resin, the wire harness is removed from the lower mold together with the first and second middle dies, and then the A method for manufacturing a wire harness-integrated grommet, comprising: releasing the first and second middle dies to obtain the wire harness in which the grommet is integrally formed.