JP2007161174A - Weather strip and its manufacturing method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a weather strip for preventing degradation of outer appearance quality and degradation of mounting work efficiency while improving dimensional precision. <P>SOLUTION: The weather strip 8 to seal a clearance between a front vertical edge part and a rear vertical edge part of a fender panel opposed to the front vertical edge part is mounted on the indoor side of an inner panel 4 on the front vertical edge part of a front door 3. The weather strip 8 is constituted of a roughly belt type base part 11 mounted along an indoor side side surface of the inner panel 4 and a lip type sealing part 12 extending to the outdoor side from a front end part in the widthwise direction of the base part 11. A pin hole 21 is previously formed at a molding stage of the base part 11, and positioning is carried out at the pin hole 21 of the base part 11 in die-forming the sealing part 12. At least the indoor side surface side of the pin hole 21 is blocked by a covering part 22 formed by extending a material constituting the sealing part 12. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a weather strip attached to a door of a vehicle and a method for manufacturing the weather strip.

  Conventionally, some doors of vehicles such as automobiles are provided with a weather strip for improving appearance quality and preventing wind noise. For example, it can be seen that a weather strip that seals the gap between the front vertical edge of the front door and the rear vertical edge of the fender panel facing the front vertical edge is attached (see, for example, Patent Document 1). .)

The weather strip includes a base made of hard synthetic resin for attachment formed in a long shape along the front vertical edge portion of the front door, and a soft elastic material molded along the longitudinal direction of the base portion. It is comprised from the seal part which consists of. Then, the base is fixed to the door panel with a clip or the like, and when the door is closed, the seal portion comes into contact with the rear vertical edge portion of the fender panel, thereby sealing the gap.
JP 2001-219749 A

  By the way, in the weather strip as described above, first, the base portion is first molded first, and then the seal portion is generally formed integrally. In this case, when molding the seal portion, the base portion is set and positioned at a predetermined position of the mold apparatus, and then the material constituting the seal section is filled in the cavity of the mold apparatus. At this time, it is difficult to perform proper alignment only by holding the base portion between the molds constituting the mold apparatus, and there is a possibility of causing a position shift at the time of molding.

  Therefore, a pin through hole is formed in advance in the base forming step, and when the seal portion is molded, a set pin is fitted into the through hole of the base and positioned, and then the seal portion is configured. It is conceivable to fill the material. Thus, by positioning the set pin in the through hole, positioning is performed properly, and the accuracy of the obtained weather strip is improved.

  However, when the through hole is formed in the base portion as described above, the through hole remains formed in the base portion of the obtained weather strip. And when the said weather strip is attached to a door, a door panel (sheet-metal part) will be visually recognized from the through-hole formed in the base, and there exists a possibility of having a bad influence on external appearance quality.

  In addition, although it is possible to attach an adhesive tape to the through-hole portion after molding, there is a risk of peeling, and depending on the material constituting the base, there are cases where it is difficult to apply the tape. Furthermore, the work efficiency is reduced by the amount of time required for installation.

  The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to provide a weather strip that can prevent deterioration in appearance quality and mounting work efficiency while improving dimensional accuracy. It is in providing the manufacturing method.

  In the following, each means suitable for solving the above-mentioned purpose will be described in terms of items. In addition, the effect etc. peculiar to the means to respond | correspond as needed are added.

Means 1. A long weather strip that is attached along a vertical edge of a vehicle door and seals between the vertical edge of the door and a portion facing the door when the door is closed,
A base fixed to the vertical edge of the door;
The base is molded along the longitudinal direction of the base with a material different from the material, and includes a seal portion that comes into contact with a portion facing the vertical edge of the door,
The base portion is formed with a pin hole for positioning by fitting a set pin when molding the seal portion, and at least the inner surface side of the pin hole is made of a material constituting the seal portion. A weather strip characterized by being covered with a covering portion formed by extending.

  According to the means 1, since the pin hole is formed in the base portion, when the seal portion is molded, the set pin is fitted into the pin hole for positioning, and the seal portion can be formed thereon. . Therefore, the dimensional accuracy of the weather strip obtained can be improved. Further, at least the inner surface side of the pin hole is closed with a covering portion formed by extending a material constituting the seal portion. For this reason, when the weather strip is attached, the door (door panel) is not visually recognized from the inside of the vehicle through the pin hole. As a result, it is possible to prevent the appearance quality from deteriorating due to a sense of discomfort. Further, a tape or clip is not separately attached to the pin hole, and the covering portion is formed together with the molding of the seal portion, so that the work efficiency is not lowered.

Mean 2. It is attached along the pivotal side vertical edge of the door panel of the door pivotally supported by the opening of the vehicle body, the pivotal side vertical edge of the door panel, and the part on the side of the vehicle body facing this when the door is closed A long weatherstrip that seals between
A base portion fixed to the inner side of the pivotal vertical edge portion of the door panel;
A seal portion that is molded along the longitudinal direction of the base portion with a material that is different from the base portion, and that comes into contact with a portion on the vehicle body side that faces the pivotal vertical edge portion of the door panel;
The base portion is formed with a pin hole for positioning by fitting a set pin when molding the seal portion, and at least the inner surface side of the pin hole is made of a material constituting the seal portion. A weather strip characterized by being covered with a covering portion formed by extending.

  According to the means 2, regarding the long weather strip for sealing between the pivotal vertical edge portion of the door panel and the portion of the vehicle main body facing the door panel when the door is closed, the same action as the above means 1 is achieved. An effect is produced.

Means 3. The door is a front door pivoted on the front side in the opening of the vehicle body,
The vehicle body side portion facing the pivotal vertical edge portion of the door panel is a rear vertical edge portion of the fender panel facing the front vertical edge portion of the door panel of the front door when the door is closed. The weather strip according to 2.

  According to the means 3, the above-mentioned effects are exerted on the weather strip that seals between the front end edge of the door panel of the front door and the rear vertical edge of the fender panel facing the front edge.

  Means 4. The weather strip according to any one of means 1 to 3, wherein the covering portion protrudes toward a vehicle inner surface side of the pin hole and has a diameter larger than the hole diameter of the pin hole.

  According to the means 4, the covering part protrudes toward the vehicle inner surface side of the pin hole and has a diameter larger than the hole diameter of the pin hole. For this reason, a covering part will be latched by a pin hole, and the situation that a covering part will move to the vehicle outside will not occur easily. As a result, a stable closed state can be maintained.

  Means 5. The base portion is fixed by a clip having an enlarged diameter portion on the vehicle inner surface side, and the covering portion has substantially the same shape as the enlarged diameter portion of the clip. The weather strip according to any one of 4 above.

  According to the means 5, the base portion is fixed to the door (door panel) with a clip having an enlarged diameter portion on the vehicle inner surface side. Moreover, in this means, since the covering part has the substantially same shape as the enlarged diameter part of a clip, it is easy to recognize a covering part as a clip from the vehicle inner side. For this reason, it is possible to eliminate a sense of incongruity compared to a configuration in which the pin hole is simply blocked, and it is easier to prevent a decrease in appearance quality.

Means 6. The base is made of an olefin resin,
The weather strip according to any one of means 1 to 5, wherein the seal portion is made of an olefin-based thermoplastic elastomer.

  According to the means 6, the base is made of a relatively hard olefin resin such as polypropylene and high density polyethylene, so that it is difficult to be deformed, and the effects of the means 1 and the like are further enhanced. Furthermore, since the seal portion is made of an olefin-based thermoplastic elastomer (TPO), predetermined elasticity can be ensured and seal performance can be ensured. Moreover, since both are the same olefin type, they are compatible and can be easily heat-welded by injection molding.

Mean 7 It is attached along the pivotal side vertical edge of the door panel of the door pivotally supported by the opening of the vehicle body, the pivotal side vertical edge of the door panel, and the part on the side of the vehicle body facing this when the door is closed A long weatherstrip that seals between the base, the base fixed to the inside of the pivotal vertical edge of the door panel, and the pivotal vertical edge of the door panel formed integrally with the base A weather strip manufacturing method comprising: a seal portion that abuts against a portion of the vehicle body facing the portion;
A base molding step for molding the base in advance;
With the base set in a mold apparatus, a material different from the base is filled into a cavity formed along the longitudinal direction of the base, and a seal part is integrated with the base and molded. A sealing part forming step
In the base molding step, a pin hole is formed at a predetermined position of the base,
In the sealing part molding step, a set pin that is provided in the mold device and forms a predetermined passage with the pin hole is fitted into the pin hole and positioned, and then the material is filled. A weather strip characterized by forming the sealing portion and forming a covering portion for closing the pin hole by allowing the material to be led out through the passage to at least the vehicle inner surface side of the pin hole. Production method.

  According to the means 7, in order to obtain a long weather strip that seals between the pivotal vertical edge portion of the door panel and the portion of the vehicle main body facing the door panel when the door is closed, as described above. It is possible to improve the dimensional accuracy, and there is an effect that the appearance quality can be prevented from being lowered and the attachment work efficiency can be prevented from being lowered.

  In addition, it is good also as "the covering part protruded in the vehicle inner surface side of the said pin hole, and was made larger diameter than the hole diameter of the said pin hole", or "the covering part is an enlarged diameter part of the clip for attachment. It is good also as having formed in the substantially the same shape.

  Hereinafter, an embodiment of a weather strip attached to a door of an automobile as a vehicle will be described with reference to the drawings.

  As shown in FIG. 2, a front door 3 is attached to an automobile 1 at an opening of a body 2 as a vehicle body. As shown in FIGS. 4 and 5, the front door 3 includes an inner panel 4 and an outer panel 5, and a front hinge is provided by a door hinge (not shown) having a pivot shaft Y in a vertical direction (a direction perpendicular to the paper surface). (Fender panel 7 side: see FIG. 2). 4 is a partial sectional view taken along line JJ in FIG. 2, and FIG. 5 is a partial sectional view taken along line KK in FIG. Further, the inner panel 4 and the outer panel 5 constitute a door panel in the present embodiment.

  A weather strip 8 for sealing a gap between the front vertical edge portion of the front door 3 and the rear vertical edge portion of the fender panel 7 facing the front vertical edge portion is mounted on the inner side of the inner panel 4. It has been. Thereby, improvement in appearance quality and prevention of wind noise are achieved.

  As shown in FIGS. 3, 4, and 5, the weather strip 8 includes a substantially strip-like (long) base portion 11 attached along the vehicle inner side surface of the inner panel 4, and a width direction front end portion of the base portion 11. It is composed of a lip-shaped seal portion 12 that extends to the outside of the vehicle and has a distal end bent toward the fender panel 7 side. The weather strip 8 is fixed to the inner panel 4 by fitting the clip 14 through the clip hole 13 formed in the base 11. By providing the weather strip 8, when the door is closed, the front end of the seal portion 12 comes into contact with the rear vertical edge of the fender panel 7, and the front vertical edge of the front door 3 and the rear vertical edge of the fender panel 7 are provided. The gap with the edge is sealed.

  The base 11 of the weather strip 8 in the present embodiment is molded by injection molding (molding) using polypropylene (PP) as a material. On the other hand, the seal part 12 is made of a olefin-based thermoplastic elastomer (TPO) softer than the base part 11 and uses a mold apparatus in which the base part 11 is set. In contrast, mold connection molding is performed.

  Next, characteristic parts of the present embodiment will be described. As described above, in the present embodiment, when the seal portion 12 is molded, the base portion 11 that has been separately molded is set as an insert at a predetermined location of the mold apparatus and aligned, and then placed in the cavity of the mold apparatus. Filled with TPO in plasticized state. At this time, it is difficult to perform proper alignment only by holding the base portion between the molds constituting the mold apparatus, and there is a possibility of causing a position shift at the time of molding. Therefore, in the present embodiment, the pin hole 21 is formed in advance in the molding step of the base portion 11 (see FIG. 1), and when the seal portion 12 is molded, positioning is performed in the pin hole 21 of the base portion 11 and then the TPO is formed. Filling is performed.

  However, in the present embodiment, the inner surface side of the pin hole 21 is closed by a covering portion 22 formed by extending a TPO constituting the seal portion 12. For convenience of molding, the seal portion 12 and the covering portion 22 are connected by a connecting portion 23 (corresponding to a communication passage 35b described later) also made of TPO.

  The covering portion 22 protrudes toward the vehicle inner surface side of the pin hole 21 and has a diameter larger than the hole diameter of the pin hole 21. Furthermore, the covering portion 22 has substantially the same shape (umbrella shape) as the diameter-expanded portion 14 a of the clip 14.

  Here, a procedure of manufacturing the weather strip 8 will be briefly described. First, as described above, the base 11 is formed by injection molding using PP as a material. At this time, a pin hole 21 penetrating the base 11 is formed.

  Next, as shown in FIG. 6, the base unit 11 is set (positioned) at a predetermined position using a mold device 31 (in the figure, an upper mold 32 and a lower mold 33) for molding a seal portion, and clamping is performed. At this time, the set pin 34 integrally formed with the upper die 32 is fitted into the pin hole 21 so that more accurate positioning is performed. In the present embodiment, the height of the set pin 34 is set to be equal to the thickness of the base portion 11 (depth of the pin hole 21). Further, the set pin 34 has a shape in which the hole shape is not circular but partly cut away from the circular pin hole 21 (see FIG. 7), and a predetermined passage between the set pin 34 and the pin hole 21. Is forming. However, the longest diameter portion of the set pin 34 is set corresponding to the longest diameter portion of the pin hole 21, and thereby the relative movement of the set pin 34 with respect to the pin hole 21 is restricted.

  Along with the mold clamping, a cavity 35 for forming the seal portion 12 is formed, and a covering portion space 35a for forming the covering portion 22 and the covering portion space 35a and the cavity 35 are communicated with each other. A communicating path 35b is formed.

  After the mold clamping is completed, the cavity 35 is filled with TPO in a plasticized state as shown in FIG. In the filling, the TPO is filled into the covering portion space 35a through the communication passage 35b (and the predetermined passage). Then, after the TPO is cooled and solidified, the above-described weather strip 8 is obtained by performing mold opening and removing the molded product.

  As described in detail above, in the present embodiment, the pin hole 21 is formed in the molding step of the base portion 11, and therefore, the positioning is performed by fitting the set pin 34 into the pin hole 21 when molding the seal portion 12. In addition, TPO can be filled and molded. Therefore, the dimensional accuracy of the weather strip 8 obtained can be improved.

  Further, the inside surface side of the pin hole 21 is closed by a covering portion 22 formed by extending a TPO constituting the seal portion 12. For this reason, when the weather strip 8 is attached, the door panel is not visually recognized from the inside of the vehicle through the pin hole 21. As a result, it is possible to prevent the appearance quality from deteriorating due to a sense of discomfort. In addition, the tape or clip is not separately attached to the pin hole 21, and the covering portion 22 is also molded together with the molding of the seal portion 12, so that work efficiency is not reduced.

  Further, the covering portion 22 protrudes toward the vehicle inner surface side of the pin hole 21 and has a larger diameter than the hole diameter of the pin hole 21. For this reason, the covering part 22 will be latched by the pin hole 21, and the situation that the covering part 22 will move to the vehicle outer side does not occur easily, As a result, the stable obstruction | occlusion state can be maintained. .

  In addition, the base portion 11 is fixed by a clip 14 having a diameter-increasing portion 14 a on the vehicle inner surface side, and the covering portion 22 has substantially the same shape as the diameter-expanding portion 14 a of the clip 14. . For this reason, the covering part 22 is easily recognized as the clip 14 from the inside of the vehicle. Therefore, it is possible to eliminate a sense of incongruity compared to a configuration in which the pin hole 21 is simply blocked, and it is easier to prevent a decrease in appearance quality.

  In addition, since the base portion 11 is made of relatively hard polypropylene, it is difficult to be deformed, and a more stable mold can be realized when the seal portion 12 is formed. Furthermore, since the seal portion 12 is made of TPO, predetermined elasticity and sealability can be ensured, and the bonding force with the base portion 11 is also good.

  In addition, it is not limited to the description content of the said embodiment, For example, you may implement as follows. Of course, other application examples and modification examples not illustrated below are also possible.

  (A) In the above embodiment, the weather strip 8 attached to the front vertical edge portion of the front door 3 is embodied, but the portion of the door to be attached is not limited to this. For example, the present invention can be applied to a weather strip that is attached to a longitudinal edge of a rear door that is pivotally supported by a center pillar. In addition, when the front door and the rear door have a double door structure, it can be applied to a weather strip that is attached to the vertical edge of the front door or the rear door facing the other door. .

  (B) In the above embodiment, the covering portion 22 protrudes toward the vehicle inner surface side of the pin hole 21, but does not necessarily protrude, and may be formed flush with the vehicle inner surface, for example. Further, the diameter may be the same or not larger than the diameter of the pin hole 21.

  (C) In the above embodiment, the covering portion 22 has substantially the same shape (for example, a front circular shape) as the diameter-expanded portion 14 a of the clip 14. On the other hand, you may have another shape (For example, other shapes, such as square shape, hexagon shape, and star shape).

  (D) The pin hole 21 as described above may be provided in only one place, or may be provided in a plurality of places. Moreover, the site | part other than the said embodiment may be sufficient as the formation site | part of the pin hole 21, for example, the site | part corresponding to the clip hole 13, or a site | part below it may be sufficient as it.

  (E) The base portion 11 of the weather strip 8 in the above embodiment is made of polypropylene (PP), and the seal portion 12 is made of olefin-based thermoplastic elastomer (TPO). The constituent material is not limited to this. For example, the base 11 may be made of another polyolefin resin such as high density polyethylene.

It is principal part sectional drawing of the weather strip in one Embodiment. It is a side view of a motor vehicle. It is the front view which looked at the weather strip from the vehicle outer side. FIG. 3 is a partial sectional view taken along line JJ in FIG. 2. FIG. 3 is a partial sectional view taken along line KK in FIG. 2. It is sectional drawing which shows typically the metal mold | die apparatus for seal | sticker part shaping | molding. It is a fragmentary perspective view which shows typically the set pin of a metal mold apparatus. FIG. 3 is a cross-sectional view schematically showing a state in which a cavity is filled with TPO, which is a mold device for molding a seal portion.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Automobile, 2 ... Body as a vehicle body, 3 ... Front door, 4 ... Inner panel, 5 ... Outer panel, 7 ... Fender panel, 8 ... Weather strip, 11 ... Base part, 12 ... Seal part, 21 ... Pin A hole, 22 ... covering part, 31 ... mold apparatus, 34 ... set pin, 35 ... cavity.

Claims (7)

A long weather strip that is attached along a vertical edge of a vehicle door and seals between the vertical edge of the door and a portion facing the door when the door is closed,
A base fixed to the vertical edge of the door;
The base is molded along the longitudinal direction of the base with a material different from the material, and includes a seal portion that comes into contact with a portion facing the vertical edge of the door,
The base portion is formed with a pin hole for positioning by fitting a set pin when molding the seal portion, and at least the inner surface side of the pin hole is made of a material constituting the seal portion. A weather strip characterized by being covered with a covering portion formed by extending. It is attached along the pivotal side vertical edge of the door panel of the door pivotally supported by the opening of the vehicle body, the pivotal side vertical edge of the door panel, and the part on the side of the vehicle body facing this when the door is closed A long weatherstrip that seals between
A base portion fixed to the inner side of the pivotal vertical edge portion of the door panel;
A seal portion that is molded along the longitudinal direction of the base portion with a material that is different from the base portion, and that comes into contact with a portion on the vehicle body side that faces the pivotal vertical edge portion of the door panel;
The base portion is formed with a pin hole for positioning by setting a set pin when molding the seal portion, and at least the vehicle inner surface side of the pin hole is made of a material constituting the seal portion. A weather strip characterized by being covered with a covering portion formed by extending. The door is a front door pivoted on the front side in the opening of the vehicle body,
The vehicle body side portion facing the pivotal vertical edge of the door panel is a rear vertical edge of a fender panel facing the front vertical edge of the door panel of the front door when the door is closed. Item 3. The weather strip according to Item 2.   The weather strip according to any one of claims 1 to 3, wherein the covering portion protrudes toward a vehicle inner surface side of the pin hole and has a diameter larger than the hole diameter of the pin hole.   The base portion is fixed by a clip having an enlarged diameter portion on the vehicle inner surface side, and the covering portion has substantially the same shape as the enlarged diameter portion of the clip. The weather strip according to any one of 4 to 4. The base is made of an olefin resin,
The weather strip according to any one of claims 1 to 5, wherein the seal portion is made of an olefin-based thermoplastic elastomer. It is attached along the pivotal side vertical edge of the door panel of the door pivotally supported by the opening of the vehicle body, the pivotal side vertical edge of the door panel, and the part on the side of the vehicle body facing this when the door is closed A long weatherstrip that seals between the base, the base fixed to the inside of the pivotal vertical edge of the door panel, and the pivotal vertical edge of the door panel formed integrally with the base A weather strip manufacturing method comprising: a seal portion that abuts against a portion of the vehicle body facing the portion;
A base molding step for molding the base in advance;
With the base set in a mold apparatus, a material different from the base is filled into a cavity formed along the longitudinal direction of the base, and a seal part is integrated with the base and molded. A sealing part forming step
In the base molding step, a pin hole is formed at a predetermined position of the base,
In the sealing part molding step, a set pin that is provided in the mold device and forms a predetermined passage with the pin hole is fitted into the pin hole and positioned, and then the material is filled. The weather strip is formed by forming the sealing portion and forming a covering portion that closes the pin hole by guiding the material to at least the inner surface side of the pin hole through the passage. Production method.

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