JP2004291952A - Sealing method for panel hemming portion of vehicle body and its structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a sealing method for a panel hemming portion of a vehicle body, developing superior rust preventing performance. <P>SOLUTION: The sealing method for the panel hemming portion of a vehicle body constructed by overlapping an inner panel 11 and an outer panel 12 with each other and turning around the outer panel at its edge in the state of holding the inner panel at its end therein comprises a step of applying a non-foaming sealing material 5 and a foaming sealing material 6 in close contact with a mating face on the inner face side between the inner panel and the outer panel in a previous step of applying a prime coat thereto. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a sealing method and a sealing structure of a hemming portion such as a door, a hood, a trunk lid, and a sunroof panel of an automobile body, and in particular, a type of a body in which a sealing material is applied to a steel base material to exhibit a rust-preventive effect. The present invention relates to a sealing method and a sealing structure for a panel hemming portion.

  For doors, hoods, trunk lids, sunroof panels, etc. of the automobile body, the inner panel pressed into a predetermined shape and the outer panel are overlapped, and the edge of the outer panel is folded back to the inner panel side so as to sandwich the end of the inner panel That is, a so-called hemming process is performed and assembled.

  Such a hemmed part has a narrow structure, so that it is difficult to form a chemical conversion coating or electrodeposition coating even if it flows into the pre-treatment process and the electrodeposition coating process of the coating line, and it is difficult to come off when rainwater enters, so it is easy to rust. was there. For this reason, when assembling the inner panel and the outer panel, a sealing material made of an epoxy-based adhesive is applied to the zero contact surface between the inner panel and the outer panel, and this is baked and hardened in an electrodeposition drying furnace to narrow the narrow portion. Rust prevention treatment.

  However, since the sealing material applied to the steel plate base has a property that it is easily compatible with the press oil attached to the panel itself, the sealing material applied to the hemming part melts out to the surface where the press oil adheres and this is insulated. There is a possibility that a portion where the electrodeposition coating film is not formed as a film may occur. For this reason, it has been practiced to apply a rust preventive wax or the like after the completion of the overcoating.

An object of the present invention is to provide a sealing method and a sealing structure excellent in rust prevention performance of a vehicle body panel hemming portion.
In order to achieve the above object, according to the present invention, a first panel and a second panel are overlapped, and an edge of the second panel is folded while sandwiching an end of the first panel. A hemming portion for a vehicle body panel, comprising: a non-foamable sealing material and a foaming material provided on a mating surface between inner surfaces of the first panel and the second panel in a process prior to a step of applying an undercoat paint. A method of sealing a hemming portion of a vehicle body panel, comprising a step of applying a volatile sealing material.

  According to the present invention, in order to achieve the above object, a first panel and a second panel are overlapped, and an edge of the second panel is sandwiched with an end of the first panel sandwiched therebetween. A sealing structure in which a sealing material is applied to a vehicle body panel hemming portion configured by folding back, and a non-foaming sealing material and a foaming material are provided on the mating surface on the inner surface side of the first panel and the second panel. A sealing structure provided with a sealing material is provided.

  In the present invention, a non-foaming sealing material and a foaming sealing material are applied to the mating surface on the inner surface side of the hemming portion in a step before the step of applying the undercoat paint. In this case, a non-foamable sealing material is applied to the front end of the mating surface, and a foaming sealant is applied to the opposite side of the front end of the mating surface. If a sealing material is used, the foamable sealing material starts to foam after the undercoat paint is dried in the undercoat paint drying process, and a non-foamable sealing material is applied to the front end side of the mating surface. Will expand in the direction opposite to the tip end of the mating surface.

  Thereby, even if there is a narrow portion near the mating surface where the undercoating film is difficult to be formed, this portion can be covered by expansion of the foamable sealing material, and rust prevention performance is improved. Further, since the expansion direction of the foamable sealing material is the rain direction toward the inner surface side of the hemming portion and does not expand at the tip end side of the mating surface, it is possible to prevent the foaming sealing material from protruding to the outer plate portion of the vehicle body panel.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

[First Embodiment]
FIG. 1 is a perspective view showing a preferred vehicle body part (entire vehicle body) to which the sealing method of the present invention is applied, and FIG. 2 is a view showing preferred vehicle body parts to which the sealing method of the present invention is applied. The method for sealing the hemming portion of the vehicle body panel according to the present invention can be applied to, for example, the hood 1, front door 2, rear door 3, and trunk lid 4 of the automobile body B shown in FIG.

  However, the present invention is not limited to these parts, but is a so-called hemming portion, that is, a body panel hemming formed by overlapping two panels and folding an edge of the other panel while sandwiching an end of one panel. Since the present invention can be applied to any part, it can be applied to, for example, a sunroof panel and a back door in addition to the parts shown in FIG.

  In the sealing method of the present embodiment, a sealing material is applied to a portion shown in FIG. 2 (indicated by a dotted line in FIG. 2). In the hood 1 shown in FIG. 1A, the inner panel 11 and the outer panel 12 are overlapped with each other as shown in the cross-sectional view, and the entire periphery of the outer panel 12 is sandwiched across the entire periphery of the inner panel 11. It is assembled by folding back to the inner panel side. Similarly, the trunk lid 4 shown in FIG. 4B has the inner panel 41 and the outer panel 42 overlapped with each other as shown in the cross-sectional view, and the edge of the outer panel 42 is sandwiched across the entire periphery of the end of the inner panel 41. It is assembled by folding the entire circumference to the inner panel side. The front door 2 shown on the left side of FIG. 3 (c) has an inner panel 21 and an outer panel 22 overlapped with each other as shown in the cross-sectional view thereof, and the outer panel 22 is sandwiched between three sides of the end of the inner panel 21. Are assembled by folding three sides of the edge of the inner panel toward the inner panel. Similarly, the rear door 3 shown on the right side of FIG. 3C has the inner panel 31 and the outer panel 32 overlapped with each other, as shown in the cross-sectional view, with three sides of the end of the inner panel 31 sandwiched therebetween. The outer panel 32 is assembled by folding three sides of the edge of the outer panel 32 toward the inner panel.

  Since the basic structure of such a hemming portion is the same, the embodiment of the present invention will be described below by taking the hemming portion of the hood 1 as an example in the following example.

  FIG. 3 is a cross-sectional view of a hemming part showing a sealing method according to the embodiment of the present invention, FIG. 4 is a cross-sectional view showing an example of a nozzle used in the sealing method according to the embodiment of the present invention, and FIG. FIG. 8 is a view showing a sealing material used in the sealing method according to the embodiment, and FIG. 8 is a cross-sectional view for explaining the effect of the sealing method according to the embodiment of the present invention.

  The sealing method according to the present embodiment is used in each assembly process of a hood and the like in a vehicle body assembly process (also referred to as a vehicle body welding process) which is a process preceding the painting line. In the process of assembling the hood 1, as shown in FIG. 3A, a flange process is performed to raise the edge 121 of the outer panel 12 of the hood 1 approximately vertically by about 10 to 20 mm over the entire circumference. Next, the entire periphery of the inner surface 12x of the outer panel 12 (the outer surface of the outer panel 12 is referred to as 12y) near the flange of the flanged outer panel 12, for example, at a position about 15 mm from the bent portion of the flange 121. The sealing materials 5 and 6 are applied over the entire surface.

  In particular, in the present embodiment, two types of sealing materials, a non-foaming sealing material 5 and a foaming sealing material 6, are adopted as the sealing material applied in this step, and the non-foaming sealing material 5 is placed on the tip side of the hemming portion. The foamable sealing material 6 is located on the side opposite to the tip side. Here, the tip side of the hemming portion refers to a direction corresponding to the edge side of the hood 1 when the hood 1 is assembled as shown in FIG.

As the non-foamable sealing material 5 used in the present embodiment, for example, an epoxy-based adhesive can be used, and when the baking temperature of the electrodeposition paint is generally maintained at 170 ° C. × 20 minutes, the curing temperature is 150 ° C. It is desirable to use one having a temperature of from 170C to 170C. The non-foamable sealing material 5 is applied with an application amount of, for example, 20 mm ² in cross-sectional area. On the other hand, as the foamable sealing material 6, for example, a material obtained by kneading a foaming agent with an epoxy-based adhesive can be used, and a foaming ratio of 10 to 30% and a foaming temperature of about 170 ° C. are used. Is desirable.

  The ratio of the application amount of the non-expandable sealing material 5 to the application amount of the expandable sealing material 6 is desirably 1: 0.5 to 1: 4. If the amount of the foamable sealing material 6 applied is too large, the foaming sealing material 6 is covered to an unnecessary range, which is wasteful. On the other hand, if the application amount of the non-foamable sealing material 5 is too small, the adhesive strength of the hemmed portion decreases.

  Since these two types of sealing materials 5 and 6 are cured and foamed in the electrodeposition drying furnace of the coating line, the curing temperature T5 of the non-foamable sealing material 5, the foaming temperature T6 of the foamable sealing material 6, and the It is preferable that the relationship with the baking temperature Td of the coating material is such that the curing temperature T5 of the non-foamable sealing material <the baking temperature Td of the electrodeposition coating material ≦ the foaming temperature T6 of the foaming sealing material. That is, when the hood 1 on which the two types of uncured and unfoamed sealing materials 5 and 6 are applied is transported to an electrodeposition drying oven, the non-foamable sealing material 5 starts to cure first, and then the electrodeposition coating film Most preferably, curing is started, and at the same time or after that, foaming of the expandable sealing material 6 is started.

  If the foaming temperature of the foamable sealing material 6 is lower than the curing temperature of the electrodeposition paint, the foamable sealing material 6 starts foaming before the electrodeposition paint starts to cure, thereby forming the panels 11 and 12 of the hood 1. The uncured electrodeposition coating film is extruded, and the range of the part where the electrodeposition coating film is not formed may be rather large due to the shrinkage behavior of the foamable sealing material 6 after cooling.

  When the curing temperature of the non-foamable sealing material 5 is higher than the foaming temperature of the foamable sealing material 6, when the foaming sealing material 6 starts foaming, the uncured non-foamable sealing material 5 is opposite to the hemmed portion. It is pushed out from the side.

  The method of applying these two types of sealing materials 5 and 6 is not particularly limited, and after applying one sealing material over the entire periphery of the outer panel 12, the other sealing material is applied along the already applied sealing material. It may be applied over the entire circumference.

  Further, a nozzle 51 to which the non-foamable sealing material 5 is supplied as shown in FIG. 4 and a nozzle 61 to which the foaming sealing material 6 is supplied are joined at their tips, and a nozzle having such two discharge ports is used. It is also possible to apply two types of sealing materials 5 and 6 at a time. If such a nozzle is used, the number of steps for applying the sealing material is reduced to about half.

  The non-foamable sealing material 5 and the foamable sealing material 6 are such that the other sealing material is applied along one sealing material, and that the non-foaming sealing material 5 is located at least on the tip side of the hemming portion. It is essential. The non-foamable sealing material 5 and the foamable sealing material 6 may be in close contact with or separated from each other. These two types of sealing materials 5 and 6 are not simply in close contact with each other as shown in FIGS. 3 (a) and 4 or, for example, as shown in FIG. A coating method covered with the foaming sealing material 5 may be used, or a coating method in which the foaming sealing material 6 is embedded in the non-foaming sealing material 5 in a wedge shape as shown in FIG. Such a close contact structure of the sealing materials 5 and 6 can be easily realized by appropriately selecting the shape and structure of the nozzle.

  Returning to FIG. 3, when the application of the sealing materials 5 and 6 is completed, the inner panel 11 is then overlaid on the outer panel 12 as shown in FIG. Next, the flange 121 is bent toward the inner panel 11 using a hemming device as shown in FIG. Thereby, in the hemming portion, the non-foamable sealing material 5 is filled at the front end side of the mating surface of the inner panel 11 and the outer panel 12, and the foaming sealing material 6 is disposed at a position along the opposite side from the front end side. Will be filled.

  When the sealing materials 5 and 6 are applied to the hemming portion as described above, the hood 1 is assembled to the automobile body B, and the hood 1 is conveyed to a pretreatment process of a coating line. In the pretreatment step, after the oil and dust adhering to the steel sheet are washed, a chemical conversion film is formed on the steel sheet surface, and further subjected to electrodeposition coating by a dipping method or the like.

  When the electrodeposition coating is completed, the automobile body B is conveyed to an electrodeposition drying furnace in order to bake the electrodeposition coating film. The baking temperature of the electrodeposition paint is kept at 170 ° C. × 20 minutes. When the automobile body B is transported to the electrodeposition drying oven, the non-foamable sealing material 5 applied to the hemming portion of the hood 1 first starts to harden, then the electrodeposition coating film starts to harden, and finally foams. Foaming of the volatile sealing material 6 starts.

  As a result, the non-foamable sealing material 5 which has already started to cure is present at the front end side of the hemming portion, so that the foamable sealing material 6 foams only toward the side opposite to the front end side. Thereby, it is possible to prevent a problem that the foamable sealing material 6 foams toward the front end side of the hemming portion and pushes the non-foamable sealing material 5 toward the front end side.

  Moreover, when the foamable sealing material 6 starts to foam toward the side opposite to the front end side, the electrodeposition coating film applied to that area has already started to be cured, so that the foamable sealing material 6 causes the electrodeposition coating to proceed. Scratching of the coating film is prevented, and the foamable sealing material 6 covers the electrodeposition coating film. This state is shown in FIG.

  On the other hand, a conventional sealing method in which the foaming sealing material 6 is not applied is shown in FIG. 8, but in this conventional method, the hemming portion on which the non-foaming sealing material 5 is applied is located on the side opposite to the tip side. In some embodiments, a coating film defect in which an electrodeposition coating film is not formed may occur. In the present embodiment, since the foamable sealing material 6 is applied to a portion where the coating film defect occurs, the steel sheet substrate is not coated as described above. No exposure.

  Note that reference numeral 7 shown by a dotted line in FIG. 3D denotes a sealing material made of a vinyl chloride resin or the like applied to cover the edge 122 of the outer panel 12 of the hood 1 in a coating process after electrodeposition baking. is there.

  As described above, in the present embodiment, the non-foamable sealing material 5 and the foamable sealing material 6 are applied to the mating surface on the inner surface side of the hemming portion in the process before the electrodeposition coating process. The material 5 may be applied continuously to the mating surface, and the foamable sealing material 6 may be applied intermittently to the mating surface.

  6A and 6B are views showing a front door to which another sealing method according to the first embodiment of the present invention is applied, wherein FIG. 6A is an overall view thereof, and FIG. 6B is a view of FIG. FIG. 6C is a cross-sectional view taken along the line EE of FIG. 6A.

  For example, taking the front door 2 of the automobile body B as an example, as shown in FIG. 6A, the front door 2 has drain holes 211 formed at three places at the bottom of the inner panel 21. The water that enters between the inner panel 21 and the outer panel 22 from the upper side of the front door 2 and accumulates therein can be discharged to the outside of the front door 2 through the drain hole 211. . In addition, such a drain hole 211 is formed not only in the front door 2 but also in a vehicle body panel (sealing structure) such as the above-described hood 1, rear door 3, and trunk lid 4.

  In the sealing method according to the present embodiment, as shown in FIG. 6C, the non-foamable sealing material 5 and the foamable sealing material are formed at the portion where the drain hole 211 is not formed, as shown in FIG. Although both sealing materials of the material 6 are applied, as shown in FIG. 6B, only the non-foamable sealing material 5 is applied to the portion where the water drain holes 211 are formed, and The sealing material 6 is not applied (see the non-application portion UA in FIG. 6A).

  As described above, the non-foamable sealing material is continuously applied to the mating surface, while the foaming sealing material is intermittently applied to the mating surface. Can be prevented from being performed.

[Second embodiment]
7A and 7B are views showing a sealing method according to a second embodiment of the present invention. FIG. 7A is an overall view of a corner portion of a hood, and FIG. 7B is a view along a line FF in FIG. FIG. 7C is a cross-sectional view taken along line GG.

  The sealing method according to the second embodiment of the present invention is characterized in that a non-foamable sealing material 5 and a foaming sealing material 6 are applied to a mating surface on the inner surface side of a hemming portion in a pre-process of an electrodeposition coating process. Similar to the sealing method according to the first embodiment, except that the foamable sealing material 6 is applied continuously, whereas the non-foamable sealing material 5 is applied only to the corners of the vehicle body panel (sealing structure). This is different from the sealing method according to the first embodiment in the point.

  First, the corners of the vehicle body panel will be described by taking, for example, the hood 1 of the automobile body B as an example. Each of the corners (see FIG. 2A) of the hood 1 is provided with an outer panel of the corner with the hemming process. As shown in FIG. 7A, a cutout 123 is formed in the outer panel 12 in order to prevent wrinkles from occurring in the outer panel 12.

  Such notches 123 are also provided at the corners of the front door 2, the rear door 3 and the trunk lid 4 of the above-mentioned automobile body B. Further, when the front door 2 and the rear door 3 are provided with a relief or the hood 1 is provided with a strong relief, a notch is also formed at each corner forming these reliefs. In the sealing method according to this embodiment, even when such a corner is formed, the non-foamable sealing material 5 is applied to the corner.

  Similar to the first embodiment, the sealing method according to the present embodiment is used in each assembly process of a hood or the like in a vehicle body assembling process which is a pre-process of a painting line, and the edge 121 of the outer panel 12 is flanged. After that, the sealing materials 5 and 6 are applied to the vicinity of the flange 121.

  At this time, as shown in FIGS. 7A and 7B, in the corner portion where the cutout portion 123 is formed, two types of sealing, a non-foaming sealing material 5 and a foaming sealing material 6, are provided. Apply material. At the time of this application, as in the first embodiment, the non-foamable sealing material 5 is located on the tip side of the hemming portion, and the foamable sealing material 6 is located on the side opposite to the tip side.

  In addition, since the notch 123 is formed in the corner portion, the edge of the inner panel 11 is exposed after the hemming process as shown in the figure, and is formed between the inner panel 11 and the outer panel 12. An opening 124 communicating with the internal space is formed between the edge of the inner panel 11 and the edge of the outer panel 12. For this reason, the air collected between the non-foaming sealing material 5 and the foaming sealing material 6 can be extracted through the opening 124, and as shown in FIG. It is not necessary to apply the foamable sealing material 5 and the foamable sealing material 6 in close contact with each other.

  On the other hand, as shown in FIGS. 7A and 7C, the non-foamable sealing material 5 is not applied to the portion where the notch 123 is not formed (the portion other than the corner portion). Then, only the foamable sealing material 6 is applied. In a portion where the notch 123 is not formed, the width of the flange 121 of the outer panel 12 is relatively wide, and the end of the inner panel 11 and the flange 121 of the outer panel 12 are in close contact with each other by hemming. Even if the foamable sealing material 6 is not applied, there is little possibility that the foamable sealing material 5 protrudes to the outer plate portion of the vehicle body panel.

  As the non-foamable sealing material 5 and the foamable sealing material 6 used in the present embodiment, for example, an epoxy-based adhesive and a material obtained by kneading a foaming agent with an epoxy-based adhesive are used, as in the first embodiment. When the baking temperature of the electrodeposition paint is a general 170 ° C. × 20 minutes holding, an epoxy adhesive having a curing temperature of 150 ° C. to 170 ° C. and a foaming agent having a foaming temperature of about 170 ° C. It is preferable to have a relationship of curing temperature T5 of non-foamable sealing material 5 <baking temperature Td of electrodeposition paint ≦ curing temperature T6 of foaming sealing material 6 as in the first embodiment. .

  The method of applying the two types of sealing materials 5 and 6 is not particularly limited, and after applying the foaming sealing material 6 over the entire periphery of the outer panel 12, the non-foaming sealing material 5 may be applied only to the corner portions. Alternatively, after the non-foamable sealing material 5 is applied only to the corner portions, the foaming sealing material 6 may be applied over the entire periphery of the outer panel 12, or the nozzles 51 and 61 described with reference to FIG. Alternatively, the non-foamable sealing material 5 may be discharged from the nozzle 51 only at the corners while the foaming sealing material 6 is continuously applied from the nozzle 61.

  As described above, in the sealing method according to the present embodiment, the foaming sealing material 6 is continuously applied to the mating surfaces, and the non-foaming sealing material 5 is applied only to the portion of the outer panel 12 where the notch 123 is formed. This makes it possible to reduce the amount of the non-foamable sealing material 5 used.

  Further, when the non-foamable sealing material 5 and the foamable sealing material 6 are sequentially applied, the non-foamable sealing material 5 is applied to the corners of the vehicle body panel as compared with the case where both the sealings 5 and 6 are applied all around. It is only necessary to apply to the part, so that the application time can be reduced.

  When the application of the sealing materials 5 and 6 is completed, the inner panel 11 is overlapped with the outer panel 12 as in the first embodiment, and the flange 121 is bent toward the inner panel 11 by a hemming device. As a result, in the hemming portion other than the corner portion, as shown in FIG. 7B, the non-foamable sealing material 5 is filled at the front end side of the mating surface of the inner panel 11 and the outer panel 12, and along the same. In this position, the foamable sealing material 6 is filled on the side opposite to the tip side. On the other hand, at the corner, as shown in FIG. 7C, the mating surface of the inner panel 11 and the outer panel 12 is filled only with the foamable sealing material 6.

  When the sealing materials 5 and 6 are applied to the hemming portion as described above, the hood 1 is assembled to the automobile body B and transported to a coating line. After passing through a pretreatment process and an electrodeposition coating process, the hood 1 is placed in an electrodeposition drying furnace. When being conveyed, first, the non-foamable sealing material 5 applied to the hemming portion of the hood 1 starts to harden, then the electrodeposition coating film starts to harden, and finally the foaming of the foamable sealing material 6 starts. .

  At this time, the non-foamable sealing material 5 is located at the front end side of the hemming portion at the corner portion, while the foaming sealing material 6 is located on the opposite side to the front end side. Since the non-foamable sealing material 5 has started to cure before the foaming 6 starts to foam, the foamed foamable sealing material 6 does not protrude from the opening 124 in the corner portion.

  Moreover, when the foamable sealing material 6 starts to foam toward the side opposite to the front end side, the electrodeposition coating film applied to that area has already started to be cured, so that the foamable sealing material 6 causes the electrodeposition coating to proceed. Scratching of the coating film is prevented, and the foamable sealing material 6 covers the electrodeposition coating film.

  The embodiments described above are described for facilitating the understanding of the present invention, and are not described for limiting the present invention. Therefore, each element disclosed in the above embodiment is intended to include all design changes and equivalents belonging to the technical scope of the present invention.

1 is a perspective view showing a preferred vehicle body part (entire vehicle body) to which the sealing method of the present invention is applied. It is a figure showing the preferred body parts to which the sealing method of the present invention is applied. FIG. 4 is a cross-sectional view of a hemming portion illustrating a sealing method according to the first embodiment of the present invention. FIG. 2 is a cross-sectional view illustrating an example of a nozzle used in the sealing method according to the first embodiment of the present invention. It is a figure showing the sealing material used for the sealing method concerning a 1st embodiment of the present invention. FIG. 6A is a view showing a front door to which another sealing method according to the first embodiment of the present invention is applied, FIG. 6A is an overall view thereof, and FIG. 6B is a view along a DD line in FIG. FIG. 6C is a cross-sectional view taken along line EE in FIG. 6A. It is a figure which shows the sealing method concerning 2nd Embodiment of this invention, FIG.7 (a) is the whole view of the corner part of a hood, FIG.7 (b) is sectional drawing in alignment with FF line of FIG.7 (a). FIG. 7C is a sectional view taken along the line GG. FIG. 4 is a cross-sectional view for explaining an effect of the sealing method according to the embodiment of the present invention.

Explanation of reference numerals

1 hood 11 inner panel (first panel)
12. Outer panel (second panel)
5: Non-foamable sealing material 6: Foamable sealing material

Claims (9)

A method for sealing a hemming portion of a vehicle body panel, wherein a first panel and a second panel are overlapped with each other and an edge of the second panel is folded with an end of the first panel sandwiched therebetween. ,
A step of applying a non-foamable sealing material and a foaming sealing material to a mating surface on an inner surface side of the first panel and the second panel in a pre-process of a coating process of the undercoat paint; Sealing method.   The non-foamable sealing material is applied to the leading end of the mating surface of the first panel and the second panel, and the foaming sealing material is applied to the tip of the mating surface of the first panel and the second panel. 2. The method for sealing a hemming portion of a vehicle body panel according to claim 1, wherein the coating is applied to an opposite side.   3. The method for sealing a hemming portion of a vehicle body panel according to claim 1, wherein a foaming temperature of the foamable sealing material is equal to or higher than a curing temperature of the undercoat paint.   The method for sealing a hemming portion of a vehicle body panel according to any one of claims 1 to 3, wherein the non-foaming sealing material and the foaming sealing material are applied to the mating surface in a state of being in close contact with each other.   The method for sealing a hemming portion of a vehicle body panel according to any one of claims 1 to 3, wherein the foaming sealing material is applied to the mating surface while being covered with the non-foaming sealing material. The non-foamable sealing material is continuously applied to the mating surface,
The method for sealing a hemming portion of a vehicle body panel according to claim 1, wherein the foamable sealing material is intermittently applied to the mating surface.   The sealing method for a car body panel hemming part according to claim 1, wherein a curing temperature of the non-foamable sealing material is lower than a curing temperature of the foamable sealing material. The foamable sealing material is continuously applied to the mating surface,
The method for sealing a hemming portion of a vehicle body panel according to any one of claims 1 to 5, wherein the non-foamable sealing material is applied only to the mating surface in a portion where a notch is formed in the second panel. . A sealing material is applied to a hemming portion of a vehicle body panel formed by stacking a first panel and a second panel and folding an edge of the second panel while sandwiching an end of the first panel. Sealing structure,
A sealing structure in which a non-foamable sealing material and a foaming sealing material are applied to a mating surface on an inner surface side of the first panel and the second panel.

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