JP2003165342A - Manufacturing method of weather strip - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To efficiently stick a double-sided adhesion tape mechanically in manufacturing a weather strip using both clip and the double-sided adhesion tape together. <P>SOLUTION: In production of the weather strip having a clip mounting face 20a and a tape mounting face 20b, the weather strip 10 is formed by extrusion molding, and the clip 40 is stuck to the clip mounting face 20a. Then, the weather strip is joined in loop form by die molding, and the heat-seal type double-sided adhesion tape 50 is stuck to the tape mounting face 20b in the joined weather strip. In this process, using a sticking device having a heating means 68 heating the tape mounting face 20b and a heat sealing layer 58 in the double-sided adhesion tape and a pressure roller 60 pressing the heated and melted heat sealing layer 58 to the tape mounting face 20b, the double-sided adhesion tape 50 is stuck to the tape mounting face 20b by heat sealing while the heating means 68 and the pressure roller 60 are moved along the circumference direction of the weather strip. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of manufacturing a weather strip which is attached to a peripheral portion of a door or an opening peripheral portion of a vehicle body by a clip and a double-sided adhesive tape.

[0002]

2. Description of the Related Art There is known a structure in which a clip and a double-sided adhesive tape are used together when a weather strip for sealing between a peripheral portion of a door of an automobile and a peripheral portion of a door opening of a vehicle body is attached to the door or the vehicle body. (For example, JP-A-9-123760). This is intended to improve the attachment and adhesion of the weather strip by using a double-sided adhesive tape together with the attachment by the clip.

FIG. 8 shows a conventional example of such a weather strip. The weather strip 100 is attached to a door frame 110.
1, a hollow seal portion 102 that exerts a sealing function by being deformed by being pressed by the opening peripheral edge portion 120 of the vehicle body when the door is closed, and a seal lip 103 that is protruded to the outside of the hollow seal portion 102. . Mounting base 101
Is attached to the door frame 110 by the clip 104, and the tape attachment surface 101b along the outdoor side is the double-sided adhesive tape 10.
It is adapted to be adhered to the door frame 110 via 5.

In manufacturing the above-mentioned weather strip, the clip 104 is automatically attached to the clip mounting surface 101a by a machine and connected in a loop shape by molding, and then the double-sided adhesive tape 105 is attached to the tape mounting surface 101b. A finished product is obtained through the process of attaching.

[0005]

Conventionally, as the above-mentioned double-sided adhesive tape 105, a pressure-sensitive adhesive type which is affixed to a weather strip when pressed at room temperature is used. In this pressure-sensitive adhesive type tape, it is necessary to degrease the tape mounting surface 101b and apply a primer in advance when the tape is attached to a weather strip. For this reason, it is difficult to apply the adhesive on a machine, and it is applied to the weather strip by hand, which causes a problem of low production efficiency.
Further, the pressure-sensitive adhesive type has a problem that the adhesiveness to the weather strip tends to vary. Furthermore, it cannot be said that it is preferable in terms of work environment because it requires primer treatment.

The present invention has been made in view of the above points, and when manufacturing a weather strip in which a clip and a double-sided adhesive tape are used in combination, the double-sided adhesive tape can be efficiently attached by mechanical attachment. It is an object of the present invention to provide a method for producing a weatherstrip, which does not require a primer treatment and can stabilize the quality of adhesion to the weatherstrip.

[0007]

SUMMARY OF THE INVENTION A method of manufacturing a weather strip according to the present invention comprises a mounting base mounted on a door peripheral edge or a vehicle body opening peripheral edge and between a door and a vehicle body protruding from the mounting base and closing the door. A weather strip having a seal portion to be compressed, the attachment base portion having a clip attachment surface attached to a door or a vehicle body by a clip, and a tape attachment surface attached to a door or a vehicle body by a double-sided adhesive tape. A method of manufacturing a method for producing a weather strip by an extrusion molding step, a clip mounting step of mounting a clip on the clip mounting surface of an extrusion molded weather strip, and an extrusion molded weather strip. Mold forming step of connecting to a shape including a corner portion by mold forming, and with respect to the tape mounting surface of the connected weather strip A tape attaching step of attaching a double-sided adhesive tape having a heat fusion layer, wherein in the tape attaching step, heating means for heating the tape attachment surface and the heat fusion layer, and the heat melted by the heating The double-sided adhesive tape is applied to the double-sided adhesive tape while moving the heating means and the pressure-bonding roller along a weather strip by using a sticking device provided with a pressure-bonding roller that is adhered by pressing a fusion layer against the tape mounting surface. It is attached to the mounting surface by heat fusion. The clip mounting process is usually performed prior to the molding process, but the clips may be mounted after the molding process.

In the present invention, the heating means and the pressure roller are moved along the weather strip while the heating means heats the tape mounting surface of the weather strip and the heat-sealing layer of the double-sided adhesive tape. The heat fusion layer that has been heated and melted is pressed against the tape mounting surface from which dust and the like on the surface has been incinerated and removed by a pressure roller. Therefore, the double-sided adhesive tape can be efficiently attached to the weather strip by heat fusion, and variations in adhesiveness can be suppressed. In addition, since it is attached by heat fusion, no primer treatment is necessary.

In the present invention, it is preferable that the tape mounting surface is formed so as to be inclined at a predetermined angle with respect to the clip mounting surface. As a result, even when the width of the bottom surface (mounting surface) of the mounting base is small and therefore the tape mounting surface and the clip mounting surface are close to each other, the clip when the tape mounting surface is heated in the tape sticking step. Since the influence on the mounting surface is small, melting of the clip can be prevented.

In the present invention, in the molding step, the weather strips are connected in a loop shape by molding,
In the tape applying step, the double-sided adhesive tape may be applied to at least a part of the circumferential direction of the loop-shaped weather strip while moving the heating means and the pressure bonding roller along the circumferential direction.

Further, in this case, mold forming portions for connecting the roof portion and other portions in the circumferential direction are provided at both ends of the roof portion of the weather strip, and the tape mounting surface has the mold forming portions at both ends thereof. The double-sided adhesive tape may be affixed to the roof part including the mold forming part in the roof part including the mold forming part. This structure is effective in preventing water leakage from the molding section to the indoor side.

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a sectional view showing a mounting structure of a weather strip 10 according to the embodiment, and shows a section taken along the line AA of FIG. The weather strip 10 is attached to the peripheral portions of the press doors 1 and 2 of the automobile shown in FIG. 6 and seals between the peripheral portion of the door opening of the vehicle body. In detail, as shown in FIG. 7, the front door 1 and the rear door 2 are formed in a loop shape corresponding to the respective peripheral shapes of the doors so as to be attached over the entire peripheral areas.

The weather strip 10 is formed by extruding the roof portion 12 attached along the roof portion of the peripheral edge of the door and the other portion 14 in the circumferential direction with different cross-sectional shapes. It is configured by connecting 16 and 16. Then, the mold forming parts 16, 1 at both ends
The roof portion 12 including 6 (the range indicated by R in FIG. 7) is attached to the door with the clip 40 and the double-sided adhesive tape 50, and the other portion 14 is attached to the door only with the clip 40. Has become. The mold forming portions 16 are formed at both ends of the roof portion 12 at corner portions extending from the upper side portion of the door peripheral portion to the side side portions extending downward.

The weather strip 10 has a cross-sectional shape shown in FIG. That is, the weather strip 10 includes an attachment base portion 20 attached to the door frame 3, a hollow seal portion 22 protruding from the attachment base portion 20, a vehicle body side seal lip 24, and a door side seal lip 26. The hollow seal portion 22 is a seal portion that exerts a sealing function by being deformed by being pressed by the vehicle body opening peripheral edge portion 4 when the door is closed. Body side seal lip 24
Is a vehicle body opening peripheral edge portion 4 outside the hollow seal portion 22.
It is a lip that seals between and. The door-side seal lip 26 is a lip that abuts and seals the flange 5 protruding toward the vehicle body at the outdoor side end of the door frame 3.

The mounting base 20 is adapted to be mounted on a mounting surface provided on the inside of the flange 5 and has a clip mounting surface 20a mounted on the first mounting surface 3a of the door frame 3. , The tape attachment surface 2 attached to the second attachment surface 3b of the door frame 3
0b and. The clip attachment surface 20a and the tape attachment surface 20b are formed adjacent to each other, and more specifically, the tape attachment surface 20b is provided adjacent to the outside of the clip attachment surface 20a. The tape mounting surface 20b is inclined upward with respect to the clip mounting surface 20a by an angle θ, that is, toward the vehicle body side, whereby the mounting surface of the mounting base 20 to the door frame is the same as the clip mounting surface 20a and the tape mounting surface. It has a mountain-shaped cross section with slopes 20b on both sides. Correspondingly, the second mounted surface 3 of the door frame 3
b is inclined toward the vehicle body by the same angle θ with respect to the first mounting surface 3a.

The angle θ is preferably set in the range of 15 degrees or more and 75 degrees or less, more preferably 30 degrees or more and 60 degrees or less, and is set to about 30 degrees in the example shown in FIG. By setting the angle, it is possible to secure the attaching property of the weather strip 10 to the door frame 3, and the first attached surface 3a of the door frame 3 can be secured.
Since the flange 5 and the flange 5 perpendicular thereto can be short-circuited via the inclined second surface 3b to be attached, the weight of the door frame 3 can be reduced accordingly.

The mounting base 20 has a clip mounting surface 20a.
Above the tape and on the tape mounting surface 20b, respectively.
8 and 30 are formed, and the hollow portion 28 on the indoor side serves as a clip hollow portion for mounting the clip 40. The clip 40 has a head portion 42, a shaft portion 44 having a diameter smaller than that of the head portion 42, and a claw-shaped locking portion 46 formed at the tip of the shaft portion 44. Face 20
From the insertion hole 28a provided in a to the clip hollow portion 28
And then attached to the weatherstrip. A large number of clips 40 are attached to predetermined locations along the longitudinal direction of the weather strip 10. The clip 40 is made of a resin such as nylon or polyacetal, and when the engaging portion 46 is inserted into the hole 6 formed in the door frame 3, the engaging portion 46 elastically deforms and is attached to the door frame 3. You can do it.

A double-sided adhesive tape 50 having a heat-sealing layer is attached to the tape mounting surface 20b. As an example, the double-sided adhesive tape 50 includes a liner 52 (release paper), a first adhesive layer (pressure-sensitive adhesive layer) 54, and
A four-layer structure including a soft tape 56 such as an acrylic foam and a second adhesive layer (heat-sealing layer) 58 is used, and is attached to the tape attachment surface 20b via the second adhesive layer 58. The thickness of the double-sided adhesive tape 50 is usually about 0.6 to 1.2 mm, preferably 0.8 mm.
It is a degree.

Next, a method of manufacturing the weather strip 10 will be described. (1) First, using a known extrusion molding device, the roof portion 1
2 and the other portion 14 described above are extruded.

(2) Extruded weather strip 1
Clips 40 and 2 are automatically inserted into the clip hollow portion 28 using a known clip mounting device.

(3) Next, in the molding step, the roof portion 12 and the other portion 14 are connected to each other through the molding portions 16 and 16 to form the loop shape shown in FIG.

(4) Then, in the tape attaching step,
The double-sided adhesive tape 50 is attached to the tape attachment surface 20b of the weather strip 10.

FIG. 3 is a schematic view of a sticking device used in the tape sticking step. This sticking apparatus is provided with a large-diameter cooling and pressure bonding roller 60 and a jet heater 68 as a heating means.

The cooling / pressing roller 60 has small diameter guide rollers 62 and 64 in contact with each other, and the double-sided adhesive tape 50 supplied through the supply roller 66 is attached to the tape mounting surface 20b.
It is designed to be pressed against. Double-sided adhesive tape 50
Is sequentially supplied in the direction of arrow B from a winding body (not shown) wound on a reel, and is supplied while being sandwiched in the width direction between the end surfaces of the guide roller 62 and the guide roller 64.

The jet heater 68 is provided on the tape mounting surface 20b of the weather strip 10 and the second side of the double-sided adhesive tape 50.
Hot air of 200 ° C. to 400 ° C. is supplied to the adhesive layer 58 to incinerate or blow away dust and the like on the surface of the tape attachment surface 20b, and heat and melt the second adhesive layer 58.

Cooling and pressure bonding roll 60 and jet heater 6
8 is incorporated in a known industrial robot capable of three-dimensional operation, while maintaining a constant distance relationship shown in FIG.
It is configured to move along the circumferential direction of the weather strip 10 (direction indicated by arrow C).

A double-sided adhesive tape 50 is produced by using this sticking device.
When attaching, the loop-shaped weather strip 10 is first set on the frame-shaped holding member 70 as shown in FIG. The holding member 70 holds the tape attachment region R shown in FIG. 4, that is, the roof portion 12 including the mold forming portions 16 and 16, and as shown in FIG. 5, the hollow seal portion 22 of the weather strip 10 and the hollow seal portion 22. The weather strip 10 is held so that the seal lips 24, 26 are fitted in the recesses 72 and the bottom surface of the mounting base 20 is exposed to the outside. Then, with respect to the weather strip 10 thus held,
The double-sided adhesive tape 50 is attached to the tape attachment surface 20b by heat fusion while the cooling / compression roll 60 and the jet heater 68 move in the tape attachment area R in the direction indicated by the arrow C.

When the weather strip 10 thus obtained is assembled to the door frame 3, the clip 40 is first attached to the door frame 3 and positioned. Then, the liner 52 of the double-sided adhesive tape 50 is pulled upward from the outdoor side to be peeled off, and the first adhesive layer 54 is attached by pressure bonding.
Is fixed to the door frame 3.

According to this embodiment described above, the double-sided adhesive tape 50 is mechanically attached to the weather strip 10, so that the number of manufacturing steps can be greatly reduced. In particular, since the clip mounting surface 20a and the tape mounting surface 20b are inclined at a predetermined angle, even if hot air is supplied to the tape mounting surface 20b, the clip mounting surface 20a is less affected by the hot air. Melting can be prevented.

Further, a heat-fusion type double-sided adhesive tape 50
Since it is mechanically attached using, the variation in adhesiveness to the weather strip 10 can be suppressed, and primer application as a pretreatment is not necessary.

Further, the tape mounting surface 20b of the mounting base 20.
Since the liner 52 is angled with respect to the peeling direction of the liner 52, the liner 52 can be smoothly peeled off without being caught by the weather strip, and the assembling workability is excellent.

Further, in this weather strip 10, the roof portion 12 including the mold forming portions 16 at both ends is assembled with the clip 40 to the door frame 3 with the double-sided adhesive tape 50, and the other portion 14 is attached to the clip 40. Since the assembling is performed only by itself, it is possible to effectively prevent water leakage to the indoor side without impairing the assembling workability and cost efficiency.

Further, by using the double-sided adhesive tape 50 together with the clip 40, it is also effective as a sound insulating measure, and it is not necessary to provide a retaining rail for retaining the weather strip on the door inner panel, so that the weight is reduced. Can be achieved.

The shape of the weather strip to which the present invention can be applied is not limited to that of the embodiment, and appropriate modifications can be considered within the scope of the present invention.
For example, the clip attachment surface and the tape attachment surface do not have to be flat surfaces but may be formed as curved surfaces.

[0036]

According to the present invention, the double-sided adhesive tape can be efficiently attached to the weather strip by heat fusion, variation in adhesiveness can be suppressed, and the primer treatment as a pretreatment is also eliminated. be able to. Furthermore,
Even if the width of the mounting base is reduced by inclining the tape mounting surface of the mounting base with respect to the clip mounting surface by a predetermined angle, it is possible to prevent melting of the clip in the tape bonding process. This allows good mechanical attachment of the double-sided adhesive tape to the strip.

[Brief description of drawings]

FIG. 1 is a sectional view of a weatherstrip mounting structure according to an embodiment of the present invention.

FIG. 2 is a sectional view of a double-sided adhesive tape.

FIG. 3 is a schematic diagram showing a configuration of a sticking device for a double-sided adhesive tape.

FIG. 4 is a plan view of a weather strip in a tape attaching process.

5 is a cross-sectional view taken along line DD of FIG.

FIG. 6 is a perspective view of an automobile.

FIG. 7 is a side view of the weather strip.

FIG. 8 is a cross-sectional view showing a conventional weatherstrip mounting structure.

[Explanation of symbols]

10… Weather strip 12 ... Roof part 16 ... Mold forming section 20 ... Mounting base 20a ... Clip mounting surface 20b ... tape mounting surface 22 ... Hollow seal part 40 ... clip 50 ... Double-sided adhesive tape 58 ... Heat fusion layer 60 ... Cooling and pressure bonding roller 68 ... Jet heater (heating means)

Front page continuation (51) Int.Cl. ⁷ Identification code FI theme code (reference) B29K 77:00 B29L 31:30 B29L 31:30 B60J 5/00 501K F term (reference) 3D201 AA12 AA37 CA02 CA22 DA16 DA18 DA23 DA31 4F211 AH23 TA05 TC03 TD11 TH06 TN02 TN24 TN25 TN67 TQ03 TQ13 4F213 AA23 AA29 AD08 AH23 WA06 WA08 WA33 WA38 WA39 WA43 WA54 WA60 WA62 WB01 WC02 WE02 WW15 WW05 WW15 WW15 WW05 WK01 WK01 WK01 W0501 W0501 W0501 W0501 W0501 W05 WK01 W03

Claims (4)

[Claims] 1. A mounting base portion mounted on a peripheral edge of a door or an opening peripheral portion of a vehicle body, and a seal portion protruding from the mounting base portion and compressed between the door and the vehicle body when the door is closed, the mounting base portion being a door. Alternatively, a method of manufacturing a weather strip having a clip attachment surface attached to a vehicle body with a clip and a tape attachment surface attached to a door or a vehicle body with a double-sided adhesive tape, the weather strip being extruded An extrusion molding step, a clip mounting step of mounting a clip on the clip mounting surface of the extrusion molded weather strip, and a molding step of connecting the extrusion molded weather strip to a shape including a corner portion by molding. , Attaching a double-sided adhesive tape having a heat-sealing layer to the tape mounting surface of the connected weather strip In a step of attaching the tape, a heating means for heating the tape attachment surface and the heat fusion layer, and a heat fusion layer melted by the heating are pressed against the tape attachment surface to be adhered. And a pressure-applying roller provided with a pressure-applying roller, wherein the double-sided adhesive tape is applied to the tape attachment surface by heat fusion while the heating means and the pressure-applying roller are moved along the weather strip. Weather strip manufacturing method. 2. The method of manufacturing a weather strip according to claim 1, wherein the tape mounting surface is formed so as to be inclined at a predetermined angle with respect to the clip mounting surface. 3. A weather strip is connected in a loop shape by molding in the molding step, and the heating means and the pressure roller are moved along the circumferential direction of the loop weather strip in the tape applying step. The double-sided adhesive tape is attached to at least a part of the circumferential direction while performing the above operation.
A method for producing the described weather strip. 4. A mold forming part for connecting the roof part and other parts in the circumferential direction is provided at both ends of the roof part of the weather strip, and the tape mounting surface includes the mold forming parts at both ends. The method for manufacturing a weather strip according to claim 3, wherein the double-sided adhesive tape is attached to a roof portion including the mold forming portion in the tape attaching step.