JPH07178763A - Door glass run for automobile - Google Patents

Abstract

PURPOSE:To improve the operatability and accuracy by a method wherein when a corner part is formed, the corner part is formed by an injection-molding by a corner die, at the end part of an extrusion-molded material, and to the corner part to be formed, a calking sponge is integrally formed at the same time to impart a joining force. CONSTITUTION:One of the surfaces of a corner part 4 with a cross sectional shape which is continuous from the end part of an extrusion-molded material is injection- molded with a forming material which is injected from a first gate (f) by a lower die A. At the same time, one of the surfaces and outer peripheral surface of a calking sponge 6 are formed. Also, the other surface of the corner part 4 with a cross sectional shape which is continuous from the end part of the extrusion-molded material is injection-molded with the forming material which is injected from a second gate(g) by an upper die B, and also, the other surface of the calking sponge 6 is formed. On the upper die B, an insertion groove (h) is formed, and in the insertion groove (h), an auxiliary die E which is made of a thin material with a high mechanical strength is inserted. By this auxiliary die E, a border surface between the corner part 4 which is injection-molded and the calking sponge 6 which is vulcanization- expanded is formed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automobile door glass run mounted on a door frame of an automobile door.

[0002]

2. Description of the Related Art As a conventional vehicle door glass run,
There are those shown in FIGS. 4 and 5.

FIG. 4 is an overall configuration diagram of an automobile door glass run mounted on a door frame of an automobile door.
FIG. 4 is a perspective view of a main part showing a configuration of a corner portion of a conventional vehicle door glass run.

In FIG. 4, an automobile door glass run is mounted on a retainer formed along the inner circumference of a door frame of an automobile door. For this reason, the entire vehicle door glass run has a length and shape along the retainer on the inner periphery of the door frame of the vehicle door, that is, an extruded material made of EPDM solid rubber or the like. 2, an upper part 3, a front corner part 4 which is a connecting part between the front rising parts 1 and 3, and a rear corner part 5 which is a connecting part between the rear rising parts 2 and 3. In addition, in order to prevent sound leakage, water leakage, etc. on the outer periphery of the front corner portion 4 and the rear corner portion 5,
The caulking sponge 6 and the caulking sponge 7 are attached with double-sided tape or the like.

For example, as shown in FIG. 5, the front rising parts 1 and 3 cut into a predetermined length with an extruded material are injection-molded by inserting their connecting ends into a corner mold. A sponge sheet having a predetermined thickness is cut from the front corner portion 4 formed by injection molding, and the sponge sheet 6 is cut into pieces.
Is joined to the front corner portion 4.

The automobile door glass run thus constructed is mounted on a retainer formed along the inner circumference of the door frame of the automobile door to prevent sound leakage, water leakage and the like.

[0007]

As described above, in the conventional vehicle door glass run, the connecting end portions of the front rising portion 1 and the upper portion 3 which are cut into a predetermined length by the extrusion molding material are used as corner molds. It is necessary to bond the caulking sponge 6 to the front corner portion 4 formed by the injection molding, and to bond the caulking sponge 6 to the front corner portion 4 with a double-sided tape or an adhesive. However, since the caulking sponge 6 is attached at the corner portion, it is difficult to perform the operation without human hands. However, when the caulking sponge 6 is manually applied, the work efficiency is lowered and the work cannot be performed efficiently in order to apply the caulking sponge 6 at an accurate position or to obtain a uniform adhesion force.

Therefore, the present invention has good workability and
An object of the present invention is to provide an automobile door glass run in which a caulking sponge can be accurately arranged in a corner portion.

[0009]

An automobile door glass run according to the present invention is mounted on a retainer formed along the inner periphery of an automobile door frame, and its corner portion has an end portion of an extruded material and a corner metal. In an automobile door glass run formed by injection molding with a mold, the corner portion is formed by injection-molding an end portion of an extruded material with a corner mold, and a caulking sponge is integrated with the corner portion formed by the injection molding. It is molded into.

[0010]

According to the present invention, a vehicle door glass run is mounted on a retainer formed along the inner periphery of an automobile door frame, and its corner portion is formed by injection molding the end portion of an extruded material with a corner die. In forming the corner portion, the corner portion is formed by injection molding with a corner mold at the end of the extruded material, and at the same time, the caulking sponge is integrally formed with the corner portion formed by the injection molding. Then, give a joining force between them.

[0011]

EXAMPLES Examples of the present invention will be described below.

FIG. 1 is a sectional view of a mold immediately after injection molding of an automobile door glass run according to an embodiment of the present invention.
FIG. 3 is a perspective view of a main part for explaining the forming principle of the corner part of the vehicle door glass run in the embodiment of the present invention. Further, FIG. 3 is a perspective view of a main part of a corner portion of an automobile door glass run according to an embodiment of the present invention.

In FIG. 1, a lower mold A, an upper mold B,
The lower slide core C and the upper slide core D are basically injection molding dies that are injection-molded to connect the ends of conventionally known extruded materials at right angles. The core D is for molding the inner surface of the corner portion 4 having a continuous cross-sectional shape from the end of the extruded material, and is not different from the conventionally known technique.

The difference is that in the lower mold A, one surface of the corner portion 4 having a continuous cross-sectional shape from the end of the extruded material is injection-molded with the molding material injected from the first gate f and the caulking sponge 6 is used. One surface and the outer peripheral surface are molded.
Further, in the upper mold B, the other surface of the corner portion 4 having a cross-sectional shape continuous from the end of the extruded material is injection-molded with the molding material injected from the second gate g, and the other surface of the caulking sponge 6 is Mold. The upper die B is provided with an insertion groove h which is a material having a high mechanical strength and which is a groove into which the auxiliary die E made of a material having a small thickness is inserted.

In particular, the auxiliary mold E is necessary for molding the outer peripheral surface of the corner portion 4 to be injection-molded and the inner peripheral surface of the caulking sponge 6. Specifically, for the sake of convenience of the explanation, the expression is emphasized in FIG.
The slits s of about 0.5 to 1.5 [mm] are continuously formed, and the shielding portion e of about 5 to 20 [mm] is formed between the slits s. The auxiliary mold E is inserted from the insertion groove h of the upper mold B and used as a boundary between the corner portion 4 for injection molding and the caulking sponge 6 for vulcanization and foaming.

The lower mold A, the upper mold B, the lower slide core C, the upper slide core D, and the auxiliary mold E thus constructed are used as follows.

First, as shown in FIG. 1, the lower mold A, the upper mold B, and the lower slide core C are placed at the positions where the corners 4 are formed, and unvulcanized at the outermost peripheral position of the lower mold A. Supply sponge rubber, close upper mold B, and then upper mold B
An auxiliary mold E is attached to the insertion groove h of. In this state, injection molding is performed on the corner portion 4, and at the same time, the sponge rubber at the outer peripheral position is vulcanized and foamed. At this time, in the slits s of the auxiliary mold E, the rubber erodes from the higher pressure side to the lower pressure side depending on the strength of the injection pressure or the foaming pressure, but the width of the slit s is 0.5 to 1.5 [. mm], the flow resistance is high, and the amount of protrusion is the material of both corners 4 and the caulking sponge 6.
A sufficient joining surface can be obtained for joining with the material. However, in the slits s of the auxiliary mold E, the amount of rubber erosion changes depending on the injection timing and the foaming timing as well as the injection pressure and the foaming pressure. When the pressure difference between the injection pressure and the foaming pressure is large, the lower die A
The end of the auxiliary mold E can be inserted into the
Should be able to restrain.

Therefore, the width of the slits s of the auxiliary mold E at the time of molding the corner portion 4 and the caulking sponge 6 can be set by the injection pressure and the foaming pressure, the injection timing and the foaming timing.

When the molding is completed, first, the upper mold B is
The auxiliary mold E is pulled out from the insertion groove h, and the upper mold B and the lower mold A are opened, and the corner portion 4 is removed from the lower slide core C and the upper slide core D. As a result, as shown in FIG. 3, the caulking sponge 6 can be integrally formed with the auxiliary mold E on the corner portion 4 formed by injection molding.

As described above, in the automobile door glass run of this embodiment, the linear glass run to be mounted on the retainer formed along the inner circumference of the automobile door frame is extruded and then extruded. Front rising part 1 which is a molding material
And the connecting end of the upper part 3 is put in a corner mold composed of a lower mold A, an upper mold B, a lower slide core C and an upper slide core D, and a corner part 4 is injection-molded.
Upper mold B, lower slide core C, upper slide core D
In a vehicle door glass run formed by injection molding with a corner die, the corner portion 4 has an end portion of the extruded material of a lower die A, an upper die B, a lower slide core C, and an upper slide core D. In addition to injection molding with a corner mold made of, the caulking sponge 6 is integrally molded with the auxiliary mold E to the corner portion 4 formed by the injection molding.

Therefore, the labor of joining the caulking sponge 6 to the corner portion 4 formed by injection molding can be saved, and the positional relationship between the corner portion 4 and the caulking sponge 6 can always be maintained accurately, so that the mounting workability thereof is improved. Further, since the caulking sponge 6 can be accurately arranged on the corner portion 4, the product yield as an automobile door glass run is good.

By the way, in the vehicle door glass run of the above-mentioned embodiment, the connecting ends of the front rising parts 1 and 3 which are extruded materials are connected to the lower mold A, the upper mold B, the lower slide core C, Although the case where the corner portion 4 is injection-molded by placing it in the corner mold made of the upper slide core D has been described, when the present invention is carried out, the corner portion 4 or the corner portion 5 is formed at the connection end portion of the extruded material. It may be injection-molded, and naturally, it may be injection-molded with the L-shaped, V-shaped, or other corner portion at the connection end of the extruded material.

Further, the corner mold of the above embodiment comprises a lower mold A, an upper mold B, a lower slide core C and an upper slide core D. The mold does not specify the type of mold, and may be any mold that can injection-mold the L-shaped, V-shaped, and other corners at the connection end of the extruded material.

In the corner portion 4 of the above-mentioned embodiment, the end portion of the extruded material is injection-molded with a corner die including a lower die A, an upper die B, a lower slide core C and an upper slide core D. The caulking sponge 6 is integrally formed by partitioning the corner portion 4 formed by the injection molding with an auxiliary mold E having slits s.
However, when implementing the present invention, the auxiliary mold E may be integrally formed with the lower mold A or the upper mold B. That is, in this embodiment, since the gap d formed by the shielding portion e between the outer circumference of the corner portion 4 and the inner circumference of the caulking sponge 6 is reduced and the elastic force is increased, the auxiliary thickness is small. Although the mold E is used, if the size of the gap d formed by the shielding portion e between the outer periphery of the corner portion 4 and the inner periphery of the caulking sponge 6 is not restricted, or mechanical strength is obtained. If possible, the auxiliary mold E can be integrally formed with the lower mold A and / or the upper mold B. In this type of embodiment, the mold operation can be simplified.

Further, although the outer circumference of the corner portion 4 and the inner circumference of the caulking sponge 6 in the above embodiment have the same length,
Of course, when the present invention is carried out, it is also possible to use those having lengths that do not match.

In the embodiment of the present invention, the end portion of the extruded material is the lower mold A, the upper mold B, the lower slide core C, and the upper slide core D as the corner portion 4 of the automobile door glass run. In addition to injection molding with a corner mold, the caulking sponge 6 is integrally molded with the auxiliary mold E with respect to the corner portion 4 formed by the injection molding. The present invention is not limited to the corner portion 4 of the glass run, but can be used when the sponge is integrally molded with the auxiliary mold E with respect to the components formed by injection molding. Further, the molding with the die is not limited to the injection molding, and it can be used also in the case of molding by transfer molding or the like.

[0027]

As described above, the automobile door glass run of the present invention is mounted on the retainer formed along the inner periphery of the automobile door frame, and its corner portion has the end portion of the extruded material at the corner metal. In an automobile door glass run formed by injection molding with a mold, the corner portion is formed by injection-molding an end portion of an extruded material with a corner mold, and a caulking sponge is integrated with the corner portion formed by the injection molding. It is molded into. Therefore, it is possible to save the trouble of joining the caulking sponge to the corner portion formed by injection molding, and always maintain the accurate positional relationship between the corner portion and the caulking sponge. Since the caulking sponge can be accurately arranged at the corner portion, the product yield as an automobile door glass run is improved.

[Brief description of drawings]

FIG. 1 is a sectional view of a mold immediately after injection molding of an automobile door glass run according to an embodiment of the present invention.

FIG. 2 is a perspective view of a main part for explaining a forming principle of a corner portion of an automobile door glass run according to an embodiment of the present invention.

FIG. 3 is a perspective view of a main portion of a corner portion of an automobile door glass run according to an embodiment of the present invention.

FIG. 4 is an overall configuration diagram of an automobile door glass run mounted on a door frame of an automobile door.

FIG. 5 is a perspective view of a main portion showing a configuration of a corner portion of a conventional vehicle door glass run.

[Explanation of symbols]

 1 Front rising part 2 Rear rising part 3 Upper 4,5 Corner part 6,7 Caulking sponge A Lower mold B Upper mold C Lower slide core D Upper slide core E Auxiliary mold e Shielding slit

Claims (1)

[Claims] 1. A door glass run for an automobile, which is mounted on a retainer formed along an inner periphery of a door frame of an automobile, and a corner portion of which is formed by injection molding an end portion of an extruded material with a corner die. The corner portion is a door glass run for an automobile, characterized in that an end portion of the extruded material is injection-molded by a corner mold, and a caulking sponge is integrally molded with the corner portion formed by the injection molding.