JPH06340219A - Manufacture of door weatherstrip - Google Patents

Abstract

PURPOSE:To provide a door weatherstrip able to secure desirable sealing performance at a corner part with good productivity. CONSTITUTION:A door weatherstrip W for a trunk part is formed of a grip part 1 of inverted U-shape, a hollow seal part 6 connected to the top part of the grip part 1 through a neck part 4, and a seal lip part 7 connected to one side of the grip part 1. A corner forming part C is extrusion-molded integrally with a straight forming part S so as to be eventually formed into ring shape. Both or one of the hollow seal part 6 and seam lip part 7 in the corner forming part C is pulled up in the unvulcanized state after extrusion and then subjected to vulcanization after being deformed and smoothed so as to be formed into the set shape at the corner forming time.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle body side of a trunk portion,
The present invention relates to a method for manufacturing a door weather strip mounted on a door sash portion of a door portion, a vehicle body side door frame, and the like.

[0002]

2. Description of the Related Art Here, a case will be mainly described as an example where a door weather strip mounted on the vehicle body side of a trunk portion is manufactured, but the same applies to the case where other door weather strips are manufactured. Is.

As shown in FIGS. 4 to 5, the door weather strip mounted on the vehicle body side of the trunk portion has an inverted U-shaped grip portion 3 in which an insert 1 is embedded and an inverted U-shaped grip portion 3.
Hollow seal portion 6 connected to the top of the through the neck portion 4
And a seal lip portion 7 connected to one side of the inverted U-shaped grip portion 3.

The inverted U-shaped grip portion 3 is made of solid rubber and is provided with a plurality of pairs of gripping lips 8 and 9 for gripping the body flange 21 of the trunk portion. The hollow seal portion 6 is made of sponge rubber.

And the above-mentioned weather strip is
From the standpoint of productivity and the like, that is, in order to reduce the number of die-molded joints, it is formed of an integrally extruded product, cut into a predetermined length, and connected at both ends to finally form an annular shape.

[0006]

When the weather strip having the above structure is mounted on an actual vehicle, the following problems may occur.

The hollow seal portion 6 at the corner portion (FIGS. 3A and 3B) falls to the outside of the vehicle as shown by the chain double-dashed line in FIG. 4, and the compression allowance when the hollow seal portion 6 is closed with respect to the trunk lid 23 is the set value. May not reach.

At this time, it is conceivable to increase the protruding height of the hollow seal portion 6, but when the trunk lid is closed, the amount of compression of the hollow seal portion 6 becomes large over the entire circumference, and the closing load of the trunk lid 23 is increased. It becomes large and is not desirable.

Further, the seal lip portion 7 is deformed downward,
When the weather strip is attached to the actual vehicle, there is a possibility that the weather strip will curl up as shown in FIG.

Further, as shown in FIG. 7, a mounting base portion 23 mounted on the sash rail 25 on the door side, a hollow seal portion 6A branched from the mounting base portion 23 and extended, and a shielding lip portion 17 are provided. Even in the case of the door weather strip having the above structure, the same problem is likely to occur when it is mounted on an actual vehicle.

That is, there is a possibility that the hollow seal portion 6A and the shielding lip portion 17 may fall inside the vehicle at the corner portion C (portion A'in FIG. 8) as indicated by the chain double-dashed line. In FIG. 7, 22 is a roof side rail and 24 is a molding.

For this reason, it may be considered that the corner forming portion is joined to the extruded straight forming portion by injection molding or the like so that the hollow seal portion and the like in the corner forming portion are vertically longer than those in the straight forming portion. However,
The corner forming portion cannot be integrally extruded with the straight forming portion, so that the productivity cannot be improved.

An object of the present invention is to provide a method for manufacturing a door weather strip which can obtain a door weather strip capable of ensuring a good sealing property at a corner portion with good productivity.

[0014]

The door weather strip of the present invention solves the above-mentioned problems by the following constitutions.

(1) The present invention according to claim 1 provides an inverted U-shaped grip portion, a hollow seal portion connected to the top of the inverted U-shaped grip portion via a neck, and the inverted U-shaped grip portion. Consisting of a seal lip part connected to one side, the corner forming part is integrally extruded with the straight forming part, and in the method of manufacturing the door weather strip for the trunk part which is finally annular, Both or one of the hollow seal portion and the seal lip portion in the corner forming portion,
It is characterized in that, in the unvulcanized state immediately after extrusion, it is vulcanized after being raised and subjected to compensating deformation so as to have a set shape at the time of corner formation.

(2) The present invention according to claim 2 comprises a mounting base portion mounted on a door sash rail, a hollow seal portion extending from the mounting base portion, and a shielding lip portion, and the corner forming portion is straight. In the method for manufacturing the door weather strip which is integrally extruded with the forming portion and finally becomes an annular shape, the shielding lip portion in the corner forming portion is provided on both or one of the hollow seal portions and is not extruded immediately after extrusion. In the vulcanized state, the vulcanization is performed after the vulcanization is performed and the shape is corrected and deformed so as to have the set shape when the corner is formed.

[0017]

Embodiments of the present invention will be described below with reference to the drawings. In addition, about the part demonstrated in the above, the same figure code | symbol is attached | subjected and a part of those description is demonstrated.

(1) FIGS. 1 and 2 show an example of the invention described in claim 1 (weather strip for a trunk portion), and FIG. 1 is a side view showing an extrusion cross section of an extrudate produced by the production method of this embodiment. 2 is a front view showing an example of a method for manufacturing the extrudate in FIG.

The inverted U-shaped grip portion 3 and the hollow seal portion 6 connected to the top of the inverted U-shaped grip portion 3 via the neck portion 4.
And a seal lip portion 7 connected to one side of the inverted U-shaped gripping portion 3.

Here, both the hollow seal portion 6 and the seal lip portion 7 in the corner forming portion C are raised,
It is deformed by compensation so as to have the set shape when the corner is formed (the cross-sectional shape is shown by a chain double-dashed line). The other portion, that is, the straight molded portion S remains in the extruded shape.

The method for manufacturing the weather strip is carried out, for example, as follows.

Immediately before the extrusion die 28 attached to the extrusion head 27 of the extruder, first and second shaping levers 29 and 30 for deforming the hollow seal portion 6 and the seal lip portion 7 are arranged as shown in the figure. Then, in the extrudate w before the vulcanization step, that is, in the unvulcanized state immediately after extrusion, the neck portion 4 of the hollow seal portion 6
The seal lip portion 7 is intermittently pressed by the first and second shaping levers 29 and 30, respectively, and the necessary distance, that is, the corner forming portion C is deformed by compensation.

The rubber material used for these weather strips is a mixture of solid rubber or sponge rubber such as ethylene propylene rubber and chloroprene rubber.

The extrudate is cut into a predetermined length and then connected at both ends to form a ring.

The weather strip thus manufactured is mounted on the body flange 21 of the trunk portion in the same manner as described above. At this time, the corner forming portion C is preliminarily deformed so as to have a set shape when the corner is formed. For this reason,
In comparison with the case where the corner portion C is not corrected and deformed, the hollow seal portion 6 falls to the outside of the vehicle as in the conventional case,
When the compression amount of the hollow seal portion 6 when the trunk lid 23 is closed does not reach the set value, or the seal lip portion 7 is deformed downward, the weather strip is attached to the actual vehicle,
Less likely to curl inward.

(2) FIG. 6 is a side view showing an extrusion cross section of an extrudate produced by the production method of the embodiment of the invention (weather strip for door sash) according to claim 2.

A mounting base portion 13 mounted on the sash rail 25 on the door body side, a hollow seal portion 6A extending from the mounting base portion 13 respectively, and a shielding lip portion 17
It is a cross-sectional structure consisting of.

In manufacturing the one having the sectional structure shown in FIG. 6, in this embodiment, both the hollow seal portion 6A and the shielding lip portion 17 in the corner forming portion C are raised in an unvulcanized state immediately after extrusion. Then, it is subjected to compensation deformation so as to have a set shape at the time of corner formation (the cross-sectional shape is shown by a chain double-dashed line). The other portion, that is, the straight forming portion S remains in the extruded shape.

This extrudate w was prepared in the same manner as in the above embodiment.
After being manufactured and cut into a predetermined length, both ends are connected to form an annular weather strip.

The weather strip manufactured in this manner, when mounted on an actual vehicle, results in complementing the deformation occurring in the corner portion, as in the above-mentioned embodiment, and has a better sealing property and appearance than the case where no correction deformation is performed. Problems are unlikely to occur.

In each of the above embodiments, a hollow seal portion,
The case where both the seal lip portion and the shielding lip portion are deformed by deformation is taken as an example.However, depending on the shape of the hollow seal portion, the seal lip portion, or the shielding lip portion and the degree of curvature of the corner portion, only one is deformed by deformation. You may let me.

[0032]

As described above, the method of manufacturing a weather strip for an automobile according to the present invention can be applied to the hollow seal portion and / or the shielding lip portion in the corner forming portion when manufacturing the one having the same sectional structure as the conventional one. Both or one of them, in an unvulcanized state immediately after extrusion, is vulcanized after being rectified and deformed so as to have a set shape at the time of corner formation. The effect is that a weather strip that can be secured can be manufactured with good productivity.

When the weather strip for the trunk portion is mounted on the actual vehicle, the hollow seal portion falls to the outside of the vehicle or the hollow portion is hollowed out as compared with the case where the conventional correction deformation is not performed because the corner portion is compensated and deformed. It is less likely that the compression allowance of the seal part when closing the trunk lid will not reach the set value, and the seal lip part will be deformed downward so that the weather strip is less likely to curl inward when it is mounted on the actual vehicle.

Similarly, when the weather strip for the door sash is mounted on the actual vehicle, the weather strip is subjected to the compensating deformation so as to complement the deformation occurring at the corner portion.
It is unlikely that the shielding lip will fall inside the vehicle.

[Brief description of drawings]

FIG. 1 is a side view showing an extruded cross section of an extrudate (weather strip for a trunk portion) produced by the method of the invention according to claim 1.

FIG. 2 is a front view showing an example of a method for manufacturing the extrudate of FIG.

FIG. 3 is a rear perspective view showing a trunk portion of an automobile,

FIG. 4 is a sectional view of a weather strip for a trunk portion in a mounting mode,

FIG. 5 is a perspective view of a mounting mode,

FIG. 6 is a side view showing an extrusion cross section of an extrudate (weather strip for a door sash portion) produced by the method of the present invention according to claim 2;

FIG. 7 is a sectional view of a mounting state of a door weather strip for a door sash portion,

FIG. 8 is a schematic plan view showing a state where the same connection is made into a ring shape.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Inverted U-shaped gripping part, 6 ... Hollow seal part, 7 ... Seal lip part, 13 ... Mounting base part, 17 ... Shielding lip part, 21 ... Car body flange, 23 ... Trunk lid, 25 ... Sushi rail, w ... Extrudate, C ... Corner forming part, S ... Straight forming part.

Claims (2)

[Claims] 1. An inverted U-shaped grip portion, a hollow seal portion connected to the top of the inverted U-shaped grip portion via a neck portion, and a seal lip portion connected to one side of the inverted U-shaped grip portion. In the method for manufacturing a door weather strip for a trunk part, wherein the corner forming part is integrally extruded together with the straight forming part, and finally becomes a ring, the hollow seal part and the seal in the corner forming part. Both or one of the lip parts, in an unvulcanized state immediately after extrusion,
The door weather strip is characterized in that it is raised and deformed by compensation so as to have a set shape at the time of corner formation, and then vulcanized. 2. A mounting base mounted on the door sash,
In a method for manufacturing a door weather strip, which comprises a hollow seal portion extending from the mounting base portion and a shielding lip portion, a corner forming portion is integrally extruded together with a straight forming portion, and finally formed into an annular shape. , Either or both of the shielding lip portion and the hollow seal portion in the corner forming portion, in an unvulcanized state immediately after extrusion, after being rectified and deformed to a set shape during corner formation, A method for manufacturing a door weather strip, which comprises vulcanizing.