JP3341641B2 - Weather strip - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a weather strip, and more particularly, to a weather strip having a trim portion to be attached to an object to be attached and a hollow seal portion. The present invention relates to a weather strip provided with a portion.

[0002]

2. Description of the Related Art Conventionally, a weather strip of this type (often referred to as an opening trim) is made of solid rubber, and has a trim portion having a substantially U-shaped cross section and is formed integrally with the trim portion. It has a hollow seal part made of sponge rubber. The weather strip is attached to an opening of a vehicle body by, for example, fitting the trim portion to a flange of a side panel. Then, when the door is closed, the seal portion and the door frame come into contact with each other, and the space between the door and the vehicle body opening is sealed.

In such weather strips, in recent years,
In order to improve the design, a decorative portion has been provided outside the trim portion. The decorative portion is formed of a thermoplastic elastomer film, fabric, or the like, which is colored in a predetermined manner so as to match the interior of an automobile.

[0004] By the way, most of the above-mentioned weather strips are formed by a known extrusion method. However, when it is necessary to form an annular shape, both ends of an extruded portion obtained by the extrusion are formed. Parts need to be connected. For this reason, conventionally, connection by molding has been performed, and a material (rubber material) equivalent to that of the extruded portion has been used for molding.

[0005] However, when a rubber material is used for the molding, it is necessary to cure and cure in a mold after injection, and the mold itself is heated to a temperature required for vulcanization (about 180 ° C to 180 ° C). 2
(00 ° C.). Therefore, when the end portion of the extruded portion is set in a mold as it is, the decorative portion covering the trim portion is melted by the heat, not only hindering the connection, The partially melted decorative portion also causes a deterioration in appearance quality.

Therefore, conventionally, at the time of molding, the decorative portion covering the portion corresponding to the terminal portion of the trim portion is separately cut off by a predetermined length, and then set in the mold (No. 1 prior art).

The technique disclosed in Japanese Patent Application Laid-Open No. 5-138684 discloses a technique in which a seal portion corresponding to a corner portion is cut in advance and connected by a molding method using a mold. Have been. In this technique, a part that the decorative part can contact is molded using a special mold having a cooling mold (a second conventional technique).

Further, Japanese Utility Model Publication No. Hei 7-2270 discloses that
There is disclosed a technique for insert-molding a fitting for fixing to a trim portion. As described above, it is necessary to perform the molding even when the foreign matter is partially insert-molded. In such a case, similarly to the first related art, a portion corresponding to the terminal portion of the trim portion is covered. The decorative part which had been used was separately cut off and set in a mold (third conventional technique).

[0009]

However, in the first to third prior arts described above, since the molded part is molded from a rubber material, it takes time for vulcanization, and as a result, the molding time is reduced. Had been prolonged.

[0010] In particular, in the first and third prior arts, it is necessary to cut off a part of the decorative portion, which causes a remarkable reduction in workability and an increase in cost. further,
If the shavings are mixed in the molded part, foreign matters have been mixed into the rubber material constituting the molded part, and the appearance quality may be impaired.

In addition, the second prior art requires a special mold, which leads to an increase in the size of the equipment and an increase in cost. In addition, since the mold is complicated, the mold parting line may have to be set at a position visible from the outside, and in such a case, the appearance quality of the molded product may be deteriorated. Furthermore, just because a special mold is used, most of the work is a heating mold, so depending on the setting state of the work in the mold, it is not always possible to prevent melting of the decorative part. Careful attention was required when setting to the, which led to a decrease in workability.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object of the present invention is to improve workability and cost reduction in manufacturing, and
An object of the present invention is to provide a weather strip capable of improving appearance quality.

[0013]

In order to achieve the above object, according to the first aspect of the present invention, a trim portion having a substantially U-shaped cross section to be attached to an object to be attached and a trim portion having a substantially U-shaped section are provided. EPD having a hollow seal portion formed integrally
An extruded portion made of an M rubber material and an olefin-based thermoplastic elastomer provided outside the trim portion .
A decorative unit configured Ri, the less of the extruded portion
Connected also formed to the terminal of the sealing portion, olefin
The weather strip having a molded part made of a thermoplastic elastomer emission system has as its gist.

Further, in the invention according to claim 2, in the weather strip according to claim 1, a separate cover member is provided on the molded part so as to correspond to the decorative part. The main point is that

[0015]

(Operation) According to the first aspect of the present invention, the trim portion of the weather strip is attached to the object. Further, the space between the adherend and the counterpart member is sealed by a hollow seal portion integrally formed with the trim portion. Further, the decorative portion provided outside the trim portion can improve the appearance quality.

Now, in the present invention, the weather strip is
At least the extruded part made of EPDM rubber material
A molded part connected to the end of the seal part is provided, and the molded part is made of an olefin-based thermoplastic elastomer. Therefore, per the performing molding
It, it is not necessary to perform vulcanization, as compared with the case of using a rubber material, molding is completed in a short time.

Further, since the temperature of the mold is not so high, the decorative portion is not melted at the time of molding. Therefore, it is not necessary to remove the decorative portion in advance during the molding.
Furthermore, there is no need to use complicated and special types. Addition
In addition, the decoration provided on the outside of the trim part with a substantially U-shaped cross section
The part is composed of an olefin-based thermoplastic elastomer
And the extruded part is made of EPDM rubber material
So, by using the same olefin-based material,
As the bonding strength between the two increases, compatibility with the molded part also increases.
Therefore, the joining force between the decorative part and the molded part also increases.

According to the second aspect of the present invention, in addition to the function of the first aspect, a separate cover is provided on the molded part so as to correspond to the decorative part. A member is provided. For this reason, the decoration part and the cover member enhance the sense of unity, and can eliminate an unnatural appearance.

[0020]

[0021]

BEST MODE FOR CARRYING OUT THE INVENTION

(First Embodiment) A first embodiment of the present invention will be described below with reference to the drawings.

As shown in FIGS. 1 to 3, an opening trim weather strip (hereinafter, referred to as the “opening trim weather strip”) is attached to a flange 13 as an attachment body of a vehicle body opening (for example, a roof side panel 12 or a door side panel) of a vehicle 11. A “weather strip” 14) is provided. The weather strip 14 includes a trim portion 15 having a substantially U-shaped cross section and a hollow seal portion 1 formed integrally with the trim portion 15.
6. The weather strip 14 is attached to the vehicle 11 by fitting the trim portion 15 into the flange 13. When the door 17 is closed, the seal 16 and the door frame 1 are closed.
8 comes into contact with each other to seal the space between the door frame 18 and the roof side panel 12.

Most of the weather strip 14 is constituted by an extruded portion 21 formed by a known extrusion method. Further, the weather strip 14 in the present embodiment is formed in an annular shape, and both end portions of the extruded portion 21 are formed into a molded portion (a portion with a mesh pattern in FIG. 1) 2.
2 are connected.

The trim portion 15 of the extruded portion 21 is
It is made of PDM solid rubber, and has a metal insert 23 embedded therein so that the trim portion 15 can maintain a predetermined shape. Further, from the inner surface of the trim portion 15, a plurality of holding seal lips 24 are formed so as to protrude inward. Therefore, when the trim portion 15 is fitted into the flange 13, the sealing lip 2
The weather strip 14 does not easily fall off due to the elastic pressing force of No. 4.

The seal portion 16 of the extruded portion 21 is
It is made of EPDM sponge rubber. further,
An interior lip 25 extending inside the vehicle is provided on the trim portion 15.
Are integrally formed. An end of a pillar garnish 26 constituting an interior component is interposed between the trim portion 15 and the indoor lip 25, and the end of the pillar garnish 26 is covered by the indoor lip 25.

In addition, in the present embodiment, a decorative portion 27 made of a thermoplastic elastomer (TPE) film is provided outside the trim portion 15 (including the interior lip 25). The decorative portion 27 is given a predetermined color so as to match an interior product (for example, the pillar garnish 26), and the presence of the decorative portion 27 improves the appearance quality. The decorative section 27 is attached to the trim section 15 at the same time as the extrusion section 21 is formed.

Next, a characteristic portion of the present embodiment will be described. The molding part 22 has basically the same cross-sectional shape as the extrusion molding part 21 (however, the holding seal lip 24 is omitted for convenience of molding). As well as thermoplastic elastomer (TPE)
It consists of. In molding the molded part 22, a mold device 30 as shown in FIG. 4 is used. That is, the mold device 30 has a simple configuration (a configuration that does not require partial cooling and partial cooling at the same time) as in the case of normal resin molding. , A second mold 32, a third mold 33, and a fourth mold 34. The second mold 32 is provided with a core 36 for forming the inner surface of the trim portion of the molded portion 22. The core 36 and the second mold 32
May be integrally formed. And each of these molds 31
34 form a cavity 35 for molding the molded part 22.

Next, a method of manufacturing the weather strip 14 having the above configuration will be described. First, a long extrusion part 21 is obtained by a known extrusion method.
At this time, as described above, the decorative portion 27 is also attached to the outside of the trim portion 15 at the same time.

Next, both ends of the extruding section 21 are set in the mold apparatus 30. At this time, unlike the related art, a part of the decorative portion 27 is not cut off, and both terminal portions are set as they are.

Then, as shown in FIG. 5, the plasticized TPE is injected and filled into the cavity 35. At this time, unlike the case of molding the rubber material, the mold device 30
Does not require a heating device necessary for vulcanization, the TPE can be molded at room temperature, and after injection and filling, is cooled by the mold device 30 and is entirely cooled and solidified.

Then, after cooling and solidifying, the mold is opened and taken out of the mold apparatus 30, whereby the weather strip 14 as shown in FIG. 1 is obtained. Next, the operation and effect of the present embodiment will be described.

The weather strip 14 in the present embodiment includes a molded part 22 connected to an extruded part 21 made of a rubber material.
It is composed of TPE. For this reason, unlike the prior art in which a rubber material is used as the material of the molded portion, there is no need to perform vulcanization or the like during the molding, and the molding is completed in a short time. As a result, workability can be improved.

Also, since the temperature of the mold device 30 does not increase so much, the decorative portion 27 does not melt during molding. Therefore, it is possible to prevent the appearance quality from being deteriorated due to the melting of the decorative portion 27. Further, since there is no possibility of melting, it is not necessary to previously cut the decorative portion 27 in molding. Therefore, it is possible to further improve the workability and reduce the cost. In addition, the decoration unit 27
Is not removed, so that the shavings of the decorative portion 27 removed during the molding are not mixed into the molded portion 22. Therefore, it is possible to suppress a situation in which the appearance quality is deteriorated due to mixing of the dust.

Further, when obtaining the molded part 22, T
PE may be injected and filled, and the decorative portion 27 does not melt, so there is no need to use a complicated and special mold. That is, the mold device 30 can be simplified. Therefore, it is possible to prevent an increase in the size of the equipment and an increase in cost. In addition, since the mold device 30 is simplified, the mold parting line can also be set at a position where it is difficult to be visually recognized from the outside. As a result, the appearance quality can be further improved.

(Second Embodiment) Next, a second embodiment of the present invention will be described. However, in the configuration and the like of the present embodiment, the same reference numerals are given to members and the like that are the same as those of the above-described first embodiment, and description thereof will be omitted. The following description focuses on the differences from the first embodiment.

In the first embodiment, the extruded part 2
In order to connect the two terminal portions, the molded portion 22 is formed. On the other hand, the present embodiment is characterized in that, as shown in FIG. 6, the mold forming portion 42 is formed at a portion corresponding to the corner portion. This is because, when the extruded portion 41 is bent at the corner, the hollow seal portion 44 is crushed and deformed by the bending stress, and it becomes difficult to exhibit the function as the seal portion 44. The purpose is to secure a hollow shape by molding.

As described above, in the present embodiment, the weather strip 40 includes the rubber extruded portion 41 having the trim portion 43, the seal portion 44, and the decorative portion 45, and the portion corresponding to the corner portion. Is the molded part 4
It is 2. The molded portion 42 is also made of TPE, as in the first embodiment.

Next, a method of manufacturing the weather strip 40 in the present embodiment will be described. First, an extruded portion 41 is obtained by a known extrusion method. At this time, similarly to the above, the decorative portion 45 is simultaneously attached to the outside of the trim portion 43.

Next, as shown in FIG.
Of these, the seal portion 44 corresponding to the corner portion is cut out to form a cutout portion 46. And the notch 4
The part corresponding to 6 is set in a mold apparatus (not shown) for molding. At this time, also in the present embodiment, a part of the decorative part 45 is not cut off,
Is set as it is.

Then, the plasticized TPE is injected and filled into the cavity of the mold apparatus. At this time, unlike the case of molding the rubber material, the temperature of the mold device is not so high, and after injection and filling, the TPE is cooled and solidified by the mold device.

After cooling and solidifying, the mold is opened and taken out of the mold apparatus, whereby a weather strip 40 as shown in FIG. 6 is obtained. In this embodiment, basically, the same operation and effect as those of the first embodiment can be obtained.

It should be noted that the present invention is not limited to the above-described embodiment, and may be carried out as follows by appropriately changing a part of the configuration without departing from the spirit of the invention. (1) In the above-described first embodiment, when forming the molded part 22, as shown in FIG. 8, a metal fitting 51 for mounting and fixing may be insert-molded into the trim part 15. As described above, it is necessary to perform the molding even when the foreign matter is partially insert-molded. In such a case, the molding can be performed by the same method as the above embodiment, and the same operation and effect can be obtained.

(2) In the above embodiment, the molded part 2
2, 42 were made of TPE, and the TPE was exposed. However, as shown in FIG. 9, the molded part 52 has a decorative part provided in a trim part of an extruded part. The cover member 53 may be provided correspondingly.

To achieve such a configuration, the cover member 53 is set in advance on the molding surface of the mold apparatus,
PE may be injected and filled. With such a configuration, the decorative part and the cover member 53 increase the sense of unity and eliminate the unnaturalness in appearance. As a result, the appearance quality can be further improved.

(3) As shown by a dotted line in FIG. 8, a separate cover member 54 may be provided to prevent the TPE from being molded. This makes molding easier than the in-mold molding of the cover member 53 described in (2) above, and can cope with a case having an insert as shown in FIG.

(4) Some or all of the indoor lip 25 and the holding seal lip 24 in the above embodiment may be omitted. Further, the number and shape of the holding seal lips 24 are not limited to those in the above-described embodiment.

[0047]

As described above in detail, according to the weather strip of the present invention, the extruded part, the decorative part, and the decorative part and the mold
The joining force with the molded portion is increased, so that it is possible to improve the workability and cost during manufacturing, and to achieve an excellent effect that the appearance quality can be improved.

In particular, according to the second aspect of the invention, the appearance quality can be further improved.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a weather strip according to a first embodiment.

FIG. 2 is a side view showing the vehicle.

FIG. 3 is an enlarged sectional view showing an extruded portion of the weather strip.

FIG. 4 is a cross-sectional view showing a mold apparatus for molding a molding section.

FIG. 5 is a cross-sectional view showing a state at the time of molding of a molded part.

FIG. 6 is a perspective view showing a weather strip according to a second embodiment.

FIG. 7 is a perspective view showing a state in which a seal portion of the extrusion-molded portion is cut away.

FIG. 8 is a perspective view showing a weather strip according to another embodiment.

FIG. 9 is a cross-sectional view showing a weather strip according to another embodiment.

[Explanation of symbols]

13: Flange as an attached body, 14, 40: Weather strip, 15, 43: Trim part, 16, 44: Seal part, 21, 41: Extruded part, 22, 42, 52: Molded part, 27, 45 ... decoration part, 30 ... mold device, 53 ...
Cover member.

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int.Cl. ⁷ , DB name) B60J 10/04

Claims (2)

(57) [Claims] 1. A substantially U-shaped cross section attached to an object to be attached.
An extruded part made of an EPDM rubber material having a trim part and a hollow seal part integrally formed with the trim part; and an olefin-based thermoplastic provided outside the trim part.
A decorative portion which is constituted by sexual elastomer, to the terminal of at least the sealing portion of the extruded portion
And a molded part formed of an olefin-based thermoplastic elastomer. 2. The weather strip according to claim 1, wherein a separate cover member is provided on the molded portion so as to correspond to the decorative portion.