JP2000061948A - Molding part of weather strip, insert member thereof, and mold structure of molding part - Google Patents

Abstract

PROBLEM TO BE SOLVED: To surely position an insert member at the time of molding of a weatherstrip. SOLUTION: At molding the mold forming part in a mold 13 continuously with the extrusion-molded parts 2 of a weatherstrip, the outer peripheral shape of an engaging part 9 for fixing the vehicular side stud of an insert member 6 is made into a square shape so as to match to the inner peripheral sectional shape of the fixing ring 14 of the mold 13 internally fitting to the engaging part, when the insert member 6 is inserted in the fixing ring 14, a sure positioning is established, resulting in developing no positional slippage at the influx of a rubber.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a weather strip that seals between a door of an automobile and an opening of a vehicle body. It relates to the positioning of the molding of the insert member to be prevented.

[0002]

2. Description of the Related Art A weather strip for sealing a gap between a door panel and a body is attached to a peripheral portion of a door panel such as a front door or a rear door of an automobile. In these weather strips, the weather strip may be pulled toward the rear side of the vehicle due to an impact when the door is opened / closed, causing a displacement. Therefore, the weather strip 100
Then, as shown in FIG. 6 to FIG. 8, the insert member 103 is formed in the die forming portion 102 continuous to the end portion of the extrusion forming portion 101.
Is embedded and the locking portion 104 formed on the insert member 103 is fixed to the stud (see FIG. 3) on the door panel side to prevent the weather strip 100 from being displaced.

As a method of molding the die-molding portion, as shown in FIG. 8, the end portion of the extrusion-molding portion 101 is inserted into the cavity 106 of the die-molding die 105, and the donut-shaped fixing ring in the cavity 106 is inserted. After the engaging portion 104 of the insert member 103 was fitted and set in 107, the molding rubber or resin 108 was flowed into the cavity 106 for molding.

[0004]

By the way, in the mold structure, the fixing ring 107 has the insert member 1
Since the insert member 103 is formed in a cylindrical shape so that the insert member 103 can be fitted therein in order to prevent the rubber from flowing into the locking portion 104 of 03, the insert member 103 rotates in the direction of the arrow in FIG. It is possible.
Therefore, when the insert member 103 is inserted into the mold or when rubber or resin flows in, the insert member 103 rotates, which makes positioning difficult.

[0005]

As a result of earnest researches for surely positioning the insert member, the present inventor has found that the outer peripheral shape of the engaging portion of the insert member is fitted into the engaging portion during molding. By using a modified cross-sectional shape that corresponds to the cross-sectional shape of the fixing ring of the mold for molding, it becomes possible to reliably position the insert member when inserting it into the fixing ring of the mold, resulting in misalignment when rubber flows in. They have found that there is no such a case, and have completed the present invention.

Here, the insert member may be made of metal or synthetic resin, and may be a flat plate or a solid body, and various insert members may be adopted depending on the place to be embedded. is there. For example, in the case of adopting a mold forming portion at the corner portion of the door opening, it is possible to adopt a hard resin member formed in a substantially L-shaped flat plate shape.

In this insert member, the locking portion is
The shape may be such that it protrudes toward the vehicle side, for example, the door panel side, and this portion is molded in a shape exposed from the molding portion. The locking portion may have any shape as long as it can be originally locked to the stud on the vehicle side to prevent displacement, for example, in accordance with the shape of the stud consisting of the shaft portion and the head fixed on the vehicle side, Examples thereof include a tubular shape in which the head portion of the stud can be fitted and a resiliently deformable claw portion on the inner surface, and a hook-shaped shape in which the head portion of the stud can be fitted in the lateral direction.

An important point of these locking portions is that they have an outer peripheral shape of a modified cross section that can be positioned simply by inserting them into the fixing ring in the mold of the mold forming portion. An irregular cross section means a cross-sectional shape other than a circle, and as its outer peripheral shape,
Any of an elliptical shape, a rectangular shape, a D-shape, and a shape having a notch or a convex portion on the outer circumference can be adopted, but the rectangular shape is preferable from the viewpoint of relatively easy production of the mold and the insert member. Further, even if they have the same polygonal shape, a quadrangle or a triangular shape that can prevent rotation deviation more reliably than a polygon having five or more polygons is preferable. Furthermore, considering the locking shape of the stud, the quadrangle is considered to be the optimum shape.

Even if the outer peripheral shape is a locking portion having an irregular cross section,
The outer peripheral portion is not necessarily limited to the continuous cylindrical shape, and as described above, it may be a hook shape capable of locking the stud from the lateral direction or a shape in which a part of the outer peripheral surface is notched. Good. This is because the locking part itself is fitted into the fixing ring of the mold for molding during the molding to prevent the rubber from flowing into the locking part side.

The fixing ring for internally fitting and positioning the engaging portion is a tubular member having an inner peripheral shape that is the same as or slightly larger than the outer peripheral shape of the engaging portion, and is made of rubber or resin. It has a structure that prevents it from flowing into the stop. This fixing ring is formed at the bottom of the cavity of one of the upper mold and the lower mold of the mold for molding. Since this cavity is for forming a continuous molding part in the extrusion molding part, an opening for insertion of the extrusion molding part is formed at least at the cavity end, and it is integrated with the extrusion molding part during molding of the molding. It is designed to be connected to.

The extrusion-molded portion normally seals the gap between the door and the body, and usually has a seal portion and a mounting portion for the door, and the seal portion also has a hollow seal portion. It is possible to adopt. The mold forming section can adopt various cross-sectional shapes, but in view of the sealing property and the appearance, it is desirable that the mold forming section has a seal section and an attachment section that match the outer shape of the extrusion molding section. In addition, when the sealing portion of the extrusion molding portion is hollow, it is possible to mold the molding portion into a hollow shape by using a core in accordance with this. In this case, it is preferable to adopt a flat plate-shaped insert member that can be embedded in the mounting portion, and the locking portion may match the vehicle side facing surface of the mounting portion or the insert member depending on the position of the stud. It is also possible to adopt a configuration in which a part of the mounting portion projects laterally and is formed at the projecting position.

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view of a die for molding showing a first embodiment, FIG. 2 is a perspective view of an insert member, and FIG. 3 is a perspective view of a die molding portion.

As shown in the figure, the molding portion 1 in this embodiment is molded at a portion where the ends of the extrusion molding portion 2 are connected to each other in the weather strip fixed to the peripheral edge of the door panel. If it is molded at the corner of the weather strip, as shown in Fig. 3,
It is L-shaped.

The mold forming part 1 is provided with a hollow seal part 3 and a mounting part 4 so as to be continuous with an extruding part 2 composed of a hollow seal part 2a and a mounting part 2b. The inner surface of the mounting portion 4 is formed with an L-shaped long hole portion 5 for removing the core for removing the hollow molding core after molding.

An insert member 6 is embedded in a side surface of the mounting portion 4 of the molding portion 1 where the door panel is fixed. As shown in FIG. 2, the insert member 6 has a flat plate shape made of hard resin, is formed in an L shape in plan view in conformity with the form of the mounting portion 4 of the mold molding portion 1, and has an outward direction at its corner portion. The overhanging portion 7 that overhangs is integrally molded, and a rubber inflow hole (not shown) is appropriately formed in order to improve the joining with the covering rubber or resin.

The projecting portion 7 is formed with a locking portion 9 formed of a head portion 8a and a shaft portion 8b for fixing to the vehicle side stud 8 in a direction perpendicular to the plate surface. The locking portion 9 is formed in a rectangular tube shape, has an inner diameter of a size that allows the stud 8 to be fitted therein, and locks the head portion 8a of the stud 8 onto the inner peripheral surface so as not to slip out. A locking claw 10 is formed. The outer peripheral shape of the locking portion 9 is a quadrangle corresponding to the inner peripheral cross-sectional shape of the fixing ring 14 of the molding die 13 into which the locking portion 9 is fitted during molding, and the rubber portion on the outer peripheral side thereof. As shown in FIG. 3, a rectangular frame-shaped groove portion 15 is formed in accordance with the shape of the fixed ring 14 that is cut out.

The mold 13 for molding is composed of an upper mold and a lower mold for covering the insert member 6 in the cavity 17 and integrally molding with the extrusion molding unit 2. The rubber or resin can be introduced. FIG. 1 shows a lower mold of a mold 13, which has an opening 18 into which an extrusion molding part 2 can be inserted at an end of a cavity 17 thereof, and a locking part 9 at a bottom of the cavity 17.
A square tubular fixing ring 14 is installed so as to fit inside and surround.

At the time of molding, the insert member 6 is inserted into the cavity 17 of the mold 13 and the locking portion 9 thereof is provided.
Is fitted into the fixing ring 14, a core for forming a hollow portion is built in, and rubber or resin is flowed in to form the molding portion 1.
In this case, since the locking portion 9 and the fixing ring 14 are formed in a rectangular tube shape, the locking portion 9 can be surely positioned and fixed by simply inserting the locking portion 9 into the fixing ring 14, and then the rubber or the resin is used. The insert member 6 does not move even when flowing in.

The outer shape of the locking portion 9 is not limited to the above-mentioned embodiment, and the locking portion 9 having the shape as shown in FIGS. 4 and 5 may be adopted. FIG. 4 shows an example in which the locking portion 9 is formed in a triangular tube shape. In this case, the head 8a of the stud 8 may be formed in a triangular shape. In addition, FIG.
Is a four-piece split type structure in which the outer peripheral shape of the locking portion 9 is quadrangular and gaps 20 are formed at the four corners. It is composed of an arcuate locking claw 10 and is configured to lock the circular stud head 8a so as not to slip out. In the figure, the shape of the fixing ring 14 is shown by a two-dot chain line on the outer peripheral side of the locking portion 9.

In FIG. 5B, two L-shaped pieces face each other,
FIG. 6 is a plan view showing a configuration of a locking portion 9 having a rectangular outer peripheral shape, in which a circular stud head 8a is locked so as not to slip out. FIG. 5 (c) is a plan view showing a locking portion 9 composed of a semicircular leg portion 22 and a C-shaped retaining portion 23 integrally formed on the upper end thereof, and a D-shape around the locking portion 9. The fixing ring 14 of FIG. In this embodiment, the circular stud head 8a is laterally engaged with the notch 24 of the locking portion 9, and even with such a hook-shaped locking portion, the positioning of the insert member 6 is performed. Is possible.

[0021]

As is apparent from the above description, according to the present invention, the vehicle side stud fastening of the insert member is performed when the die forming portion is formed in the die continuously with the extrusion forming portion of the weather strip. Since the outer peripheral shape of the locking portion has a modified cross-sectional shape according to the inner peripheral cross-sectional shape of the fixing ring of the mold into which it is fitted, it is possible to reliably position the insert member when it is inserted into the fixing ring. Therefore, there is an effect that it is possible to prevent the positional displacement due to the inflow of rubber or resin.

[Brief description of drawings]

FIG. 1 is a perspective view of a mold for molding showing a first embodiment of the present invention.

FIG. 2 is a perspective view of the insert member.

FIG. 3 is a perspective view of a molding unit.

FIG. 4 is a view showing a second embodiment of the insert member.

5 (a), (b), and (c) are plan views showing another embodiment of a locking portion of an insert member, respectively.

FIG. 6 is a perspective view of a conventional mold forming unit.

FIG. 7 is a perspective view of the same insert member.

FIG. 8 is a perspective view of a mold for molding the same.

[Explanation of symbols]

Mold 1 2 Extrusion molding section 3 Seal part 4 Mounting part 5 notches 6 Insert member 9 Locking part 10 locking claws 13 mold 14 fixing ring 17 cavities

Claims (5)

[Claims] 1. A die molding portion, which is continuous with an extrusion molding portion of a weather strip and in which an insert member is embedded, is provided with a locking portion for fastening to a vehicle side stud, the engagement member being formed on the insert member. A weather-strip mold forming part in which the outer peripheral shape of the stopper part has a modified cross-sectional shape corresponding to the cross-sectional shape of the fixing ring of the mold for molding into which the locking part is fitted during mold forming. 2. The mold forming section according to claim 1, wherein the engaging section has a quadrangular outer peripheral cross-sectional shape. 3. The insert member according to claim 1, wherein the insert member is embedded in a molding part. 4. A mold structure, which is continuous with an extrusion molding part of a weather strip and molds a mold molding part in which an insert member is embedded, wherein a fixing ring is projected in a cavity of the mold, and the insert member is formed. A metal mold structure of a mold forming portion in which a locking portion for fastening a vehicle-side stud is projectingly provided, and an inner peripheral shape of the fixing ring and an outer peripheral shape of the locking portion have an irregular cross section. 5. The mold structure according to claim 4, wherein an inner peripheral shape of the fixing ring and an outer peripheral shape of the locking portion are quadrangular.