JP4342377B2 - Roof molding for vehicle and method for manufacturing the same - Google Patents

Description

The present invention relates to a long roof molding for a thermoplastic elastomer having a decorative portion positioned on the outer surface side when mounted on a roof panel of a vehicle body , and a method for manufacturing the same.

Conventionally, a trim material such as a roof molding mounted on a roof panel of a car body of an automobile is often used made of a polyvinyl chloride resin. However, the trim material made of polyvinyl chloride resin has a drawback in that gas that pollutes the environment is generated when waste is incinerated.

As a countermeasure, for example, as described in Patent Document 1 (Japanese Patent Laid-Open No. 2001-138440), it has been proposed to form a trim material such as a roof molding with TPO (olefin-based thermoplastic elastomer). .
JP 2001-138440 A (2nd page etc.)

  In general, a TPO that forms a trim material such as a roof molding has a rubber component (soft component) such as EPDM, a resin component (hard component) such as an olefin resin, and an oil component such as process oil as main components. By using a kneaded mixture of the above, the trim material has an appropriate flexibility so that the trim material can be easily bent and deformed along the curved surface of the vehicle body panel.

  Incidentally, in recent years, trim materials such as roof moldings have been required to be colored with the same color as, for example, vehicle body panels. However, as described above, the TPO trim material containing the oil component has a characteristic that the oil component bleeds (exudes) on the surface, so that even if a colored coating film is formed on the surface of the trim material, the bleed There is a drawback in that the colored paint film cannot be sufficiently adhered to the surface of the trim material due to the oil component, and a good colored paint cannot be applied to the surface of the trim material.

The present invention has been made in consideration of these circumstances, an object of the present invention therefore, while ensuring the attachment of the roof molding, to be able to perform a good tinctorial painted roof molding It is.

In order to achieve the above object, a vehicle roof molding according to claim 1 of the present invention is formed to be curved around the vehicle interior side along the front-rear direction of the vehicle at the joint portion of the roof panel of the vehicle body. A decorative portion located on the outer surface side when mounted on a roof groove having a contact surface and a side wall, and an attachment portion provided so as to protrude to the back surface side of the decorative portion and fixable to the roof groove. a roof molding for integrally forming thermoplastic elastomeric elongated vehicle, escutcheon, by co-extrusion of the olefinic thermoplastic elastomer (hereinafter referred to as "TPO"), the decorative body portion And a decorative surface layer portion laminated on the outer surface side of the decorative main body portion and thinner than the decorative main body portion, and fused and integrated, and the decorative surface layer portion is at the end in the width direction of the decorative main body portion. Form up to the terminal and take it in the roof groove The decorative body portion is formed so as to come into contact with the contact surface of the roof groove when scraped, and the thickness dimension of the decorative surface layer portion is in the range of 0.05 to 2 mm and the thickness dimension of the decorative main body portion is 1 / 2 or less, and the mounting portion includes a trunk portion that supports the decorative portion, a root portion that extends from the root side of the trunk portion to both sides in the width direction, and a tip portion of the root portion that extends toward both sides in the width direction. and a resilient lip protruding, elastic lip is formed so as to lock in contact with the side wall of the roof groove is elastically deformed when mounting the roof molding to a roof ditch, the decorative body portion and the mounting portion The TPO that forms at least the elastic lip of the rubber contains a process oil component and uses a rubber component having a larger mixing ratio than the TPO that forms the decorative surface layer portion. The TPO that forms the decorative surface layer portion is a process oil component. Contain A resin component having a higher mixing ratio and higher hardness than TPO forming the decoration main body part, and on the surface of the decoration surface layer part, in order from the decoration surface layer part side, at least a polyolefin or acrylic base coat layer and an acrylic type Alternatively, a colored coating film is formed by laminating a urethane-based colored coating layer.

In this configuration, the decoration body is formed of TPO that contains the process oil component and the mixing ratio of the rubber component (soft component) is larger than that of the decoration surface layer, so that the roof molding can have appropriate flexibility. The roof molding can be easily bent and deformed along the curved surface of the roof panel of the vehicle body. Furthermore, since the decorative surface layer portion is formed of TPO not containing the process oil component, the oil component does not bleed on the surface of the decorative surface layer portion, and the colored coating film can be sufficiently adhered to the surface of the decorative surface layer portion. Thus, a good colored coating can be applied to the surface of the roof molding . Moreover, since the decorative surface layer portion is formed thinner than the decorative main body portion, even if the decorative surface layer portion has low flexibility, the influence is small, and sufficient flexibility can be ensured as the entire roof molding . Moreover, since both the decoration main body part and the decoration surface layer part are formed of TPO, they can be fused and integrated by coextrusion molding and firmly bonded.
Further, the decorative surface layer portion is formed so that the thickness dimension is in the range of 0.05 to 2 mm and less than or equal to 1/2 the thickness dimension of the decorative main body portion. The thickness can be sufficiently reduced, and the flexibility of the roof molding can be ensured.

When the roof molding of the present invention is manufactured, as in claim 6 , first, a roof molding intermediate product provided with a decorative portion in which a decorative main body portion and a decorative surface layer portion are formed and integrated by extrusion molding. After that, a colored coating film may be formed on the surface of the decorative surface layer portion of the intermediate product of the roof molding . Alternatively, as in claim 7 , a roof molding intermediate product (for example, a manufacturing method according to claim 11 ) in which a decoration body portion and a decoration surface layer portion are formed by extrusion molding and a decoration portion fused and integrated is provided. A manufactured roof molding ) may be obtained, and a colored coating film may be formed on the surface of the decorative surface layer portion of the intermediate product of the roof molding .

In addition, as in the second and eighth aspects, the colored coating film may be formed by laminating an acrylic or urethane transparent top coat layer on the upper side of the colored coat layer. In this way, the colored coating film can be protected by the transparent topcoat layer, and the weather resistance, scratch resistance, and chemical resistance of the colored coating film can be improved.

  Furthermore, as described in claim 3, the colored coating film is a glitter made of an acrylic or urethane transparent resin containing innumerable fine glitter pieces that reflect light between the colored coat layer and the transparent top coat layer. Layers may be stacked. If it does in this way, the design with the depth can be provided to a colored coating film by a bright layer.

Further, as in claims 4 and 9 , a cap portion that shields the longitudinal end of the attachment portion is formed by bending the end of the decorative portion in the longitudinal direction toward the back surface side in a substantially L shape, and the cap A colored coating film may also be formed on the surface of the part. In this way, the surface part of the cap part can be formed with a decorative surface layer part, and a colored coating film can be formed on the surface thereof. Can be sufficiently adhered to the surface of the cap portion, and a good colored coating can be applied.

Alternatively, the cap portion formed by injection molding of the same TPO as the decorative surface layer portion is shielded from the longitudinal end of the attachment portion at the longitudinal end of the decorative portion as in claims 5 and 10. It may be fixed and a colored coating film may also be formed on the surface of the cap portion. In this way, the cap part can be formed with the same TPO as the decorative surface layer part, and a colored coating film can be formed on the surface thereof, so that the colored coating is applied to the surface of the cap part as with the decorative surface layer part. The film can be sufficiently adhered, and a good colored coating can be applied to the surface of the cap portion.

  Hereinafter, two embodiments 1 and 2 in which the present invention is applied to a roof molding mounted on a vehicle body panel will be described.

A first embodiment of the present invention will be described with reference to FIGS.
As shown in FIG. 1, roof side panels 12 ( roof panels) are joined to the left and right sides of a roof center panel 11 ( roof panel) of an automobile by spot welding or the like. A long roof molding 14 (decorative trim material) is attached to a roof groove 13 (see FIG. 2) formed along the joint between the roof panels 11 and 12, and the roof molding 14 is used to mount the roof panel 11 and the roof panel 11 and 12 together. Twelve joints are covered. Incidentally, the roof groove 13, as shown in FIG. 4, is formed in a curved shape with a curvature radius of several meters to tens of meters around the vehicle interior side in the longitudinal direction of the vehicle.
Next, the configuration of the roof molding 14 will be described with reference to FIGS.

  As shown in FIG. 2, the roof molding 14 includes a decorative portion 15 that is positioned on the outer surface side when mounted in the roof groove 13, and a mounting portion 16 that is provided so as to protrude to the back side of the decorative portion 15. Are integrally formed by extrusion molding of TPO (olefin-based thermoplastic elastomer).

  The decorative portion 15 of the roof molding 14 is fused and integrated by laminating a decorative surface layer portion 18 thinner than the decorative main body portion 17 on the outer surface side of the decorative main body portion 17. The thickness of the decorative main body portion 17 is formed to be maximum (range of 2 to 10 mm) at the center in the width direction and minimum (range of 0.5 to 5 mm) at both ends, while the decorative surface layer portion 18 is formed. Is formed such that the thickness dimension is in a range of 0.05 to 2 mm and is 1/2 or less (more preferably 1/4 or less) of the thickness dimension of the decorative main body portion 17.

  The TPO that forms the decorative main body portion 17 is a soft TPO in which a rubber component such as EPM or EPDM, a resin component such as a polyolefin resin, and a process oil component are kneaded as main components, and the TPO that forms the decorative surface layer portion 18. A rubber component having a larger mixing ratio and a durometer hardness according to JISK7215 of about HDA 70 to 80 degrees (more preferably HDA 75 degrees) is used.

  On the other hand, the TPO that forms the decorative surface layer portion 18 is compatible with the TPO of the decorative main body portion 17 and does not contain a process oil component in order to ensure adhesion with the colored coating film 19 described later. It is a hard TPO kneaded mainly with a rubber component such as EPM and EPDM and a resin component such as a polyolefin resin, and the mixing ratio of the resin component is higher and the hardness is higher than that of TPO forming the decorative body portion 17, and JISK7215. A durometer hardness of about 45 to 55 degrees (more preferably 48 to 52 degrees HDD) is used.

  As apparent from FIGS. 2 and 3, the decorative surface layer portion 18 covers the entire outer surface side of the decorative main body portion 17, but stops at the terminal at the end in the width direction (of the decorative main body portion 17. It does not wrap around to the back side). Therefore, when the roof molding 14 is attached to the roof panels 11 and 12, the step portions 11 a and 12 a are in contact with the coated roof panels 11 and 12, which are relatively softer than the decoration surface layer portion 18. In addition, the painted surfaces of the roof panels 11 and 12 are not damaged due to vibrations or the like while the vehicle is running, and no abnormal noise such as “tapping noise” is generated.

  As shown in FIG. 5, a colored coating film 19 is formed on the surface of the decorative surface layer portion 18 by spray coating or the like. The colored coating film 19 includes, in order from the decorative surface layer portion 18 side, a polyolefin-based or acrylic base coat layer 20, an acrylic-based or urethane-based colored coat layer 21, and an acrylic-based or urethane-based transparent containing a bright piece. A glittering layer 22 made of resin and an acrylic or urethane transparent topcoat layer 23 are laminated. In FIG. 5, the thickness of the colored coating film 19 is shown larger than the actual thickness. Moreover, it is preferable that the formation range of the colored coating film 19 is also kept in the same range as the decorative surface layer portion 18 for the same reason as described above.

  On the other hand, as shown in FIG. 2, the mounting portion 16 of the roof molding 14 includes a trunk portion 24 that supports the decorative portion 15, a root portion 25 that extends from the root side of the trunk portion 24 to both sides in the width direction, and a vehicle of the root portion 25. Elastic lips 26 and 27 projecting from the inner and vehicle front ends are integrally formed. In addition, a core material 28 for preventing expansion / contraction formed of a metal plate, a metal wire or the like is integrally embedded in the substantially central portion of the trunk portion 24 by insert molding.

  The TPO that forms the trunk portion 24 is a hard TPO and has a durometer hardness according to JISK7215 of about HDA 85 to 93 degrees (more preferably 90 degrees HDA), and the TPO that forms the root portion 25 and the elastic lips 26 and 27. Is a soft TPO and has a durometer hardness according to JIS K7215 of about HDA 70 to 80 degrees (more preferably HDA 75 degrees). In FIG. 2, the two-dot chain line indicates the shape of the elastic lips 26, 27 in a free state, and is set to a dimension that exceeds the width of the roof groove 13.

  As shown in FIG. 4, the lower end portion of the decorative main body portion 17 is formed on the front end portion in the longitudinal direction of the roof molding 14 in a portion where a cap portion 30 described later is formed (range indicated by W <b> 1 in FIG. 4). The first notch 29 is formed by removing the attachment portion 16 (the trunk portion 24, the root portion 25, the elastic lips 26 and 27, and the core material 28). Then, the terminal in the longitudinal direction of the decorative portion 15 (the portion corresponding to the first notch 29) is heated to a temperature equal to or higher than the heat deformation temperature and is bent in a substantially L shape toward the back side. The cap part 30 which shields the terminal of the longitudinal direction of the attaching part 16 is formed by carrying out plastic deformation. A colored coating film 19 is also formed on the surface of the cap portion 30.

  Further, as shown in FIGS. 3 and 4, the root portion 25 and the elastic lips 26 and 27 are removed at a portion to which the mounting tool 33 described later is fixed and its peripheral portion (range indicated by W <b> 2 in FIG. 4). Thus, the second notch 31 is formed, and the lower portion of the root portion 25 and the elastic lips 26 and 27 are removed in a portion adjacent to the second notch 31 (range indicated by W3 in FIG. 4). As a result, the third notch 32 is formed.

Then, the mounting tool 33 is plastically deformed so as to sandwich the trunk portion 24 of the second notch 31 from both sides with the mounting tool 33 formed of a metal plate or the like, and the engaging claw 34 of the mounting tool 33 is moved to the trunk portion 24. The fitting tool 33 is attached and fixed to the trunk portion 24 by engaging with the engaging groove 35 and biting the distal end portion of the engaging claw 34 into the trunk portion 24. On the other hand, the bottom of the roof groove 13, the stud 36 of the metal T-shaped is fixed by welding or the like, the roof molding 14 is the decorative part 15 side and the outer side of the radius of curvature R of the curved (tens of meters from a few meters) Then, the roof molding 14 is mounted and fixed to the roof groove 13 by engaging the engaging hole 38 of the mounting tool 34 attached to the roof molding 14 with the head 37 of the stud 36. It has become so. It should be noted that the same structure as that of the front side can be adopted in the rear side terminal portion.

As shown in FIG. 2, when the roof molding 14 is mounted on the roof groove 13, the elastic lips 26 and 27 are elastically deformed upward at the portions other than the terminal portion so as to contact the side walls 11b and 12b of the roof groove 13. In addition to contacting and locking, the back surfaces of both ends in the width direction of the decorative main body portion 17 abut against the step portions 11a and 12a (contact surfaces) of the roof panels 11 and 12, respectively, and slightly bend upward. The twelve joints (roof groove 13) are covered.

Next, a method for manufacturing the roof molding 14 will be described.
First, in the molding process, a TPO material and a core material 27 for molding each part of the roof molding 14 are supplied to an extrusion molding machine (not shown), and the decoration main body portion 17, the decoration surface layer portion 18, the trunk portion 24, and the root portion. 25 and elastic lips 26 and 27 are simultaneously formed by co-extrusion and fused and integrated, and a core material 28 is inserted and embedded integrally. In this molding process, TPO that forms a portion other than the decorative surface layer portion 18 uses TPO containing a process oil component, but the TPO that forms the decorative surface layer portion 18 ensures adhesion to the colored coating film 19. Therefore, TPO containing no process oil component is used.

  In this molding process, after the roof molding intermediate product (roof molding before color painting) is continuously molded, the process proceeds to a regular cutting process, and the roof molding intermediate product is cut into a predetermined length. And in the terminal part of the longitudinal direction of a roof molding intermediate product, in the part (the range shown by W1 in FIG. 4) which forms the cap part 30, the lower part of the decoration main body part 17 and the attachment part 16 (the trunk part 24, the root part) 25, the elastic lips 26 and 27, and the core material 28) are cut and removed to form the first notch 29. Further, the base portion 25 and the elastic lips 26 and 27 are cut and removed at a portion where the mounting tool 34 is engaged and its peripheral portion (range indicated by W2 in FIG. 4), thereby forming a second notch 31. Then, in the portion adjacent to the second notch 31 (the range indicated by W3 in FIG. 4), the lower side portion of the root portion 25 and the elastic lips 26, 27 are cut and removed to form the third notch 32. To do. The first to third cutouts 29, 31, and 32 may be formed for each cutout or at three places simultaneously.

  Then, it progresses to a cap formation process, the terminal (part corresponding to the 1st notch 29) of the longitudinal direction of the decoration part 15 is heated and softened to the temperature more than heat deformation temperature, and the decoration part 15 is in that state. The cap part 30 is formed by bending the terminal in the longitudinal direction toward the back side (the direction indicated by the arrow X in FIG. 4) in a substantially L shape and plastically deforming it.

  After completion of the cap forming process, the cap part 30 is trimmed if necessary, and the process proceeds to the painting process. The colored coating film 19 is applied to the surface (including the surface of the cap part 30) of the decorative surface layer part 18 of the intermediate product of the roof molding. Form. This coating process is carried out in the order of decorative surface degreasing process → base coat application process → colored coat application process → bright paint application process → transparent top coat application process → baking process.

  In the decorative portion surface degreasing step, the surface of the decorative surface layer portion 18 is degreased and washed by wiping with a soft cloth impregnated with a mixed solution of n-hexane and IPA (isopropyl alcohol), for example.

  In the base coat application step, for example, a solvent-type acrylic resin paint is applied to the surface of the decorative surface layer portion 18 by spray coating so that the film thickness when dried is about 10 μm, and the base coat layer 20 (base for coating) Form. In addition, before forming the base coat layer 20, the surface of the decorative surface layer portion 18 is subjected to surface modification by performing a low temperature plasma treatment, a corona discharge treatment, a flame treatment, an acid cleaning treatment, etc., so that the adhesion with the base coat layer 20 is improved. You may make it raise.

  In the color coat application step, for example, a solvent-type acrylic resin paint is applied to the surface of the base coat layer 20 by spray coating so that the film thickness when dried is about 30 μm, thereby forming the color coat layer 21. At that time, the paint is a two-component type (a type in which a curing agent is added immediately after application after dilution with a thinner), a one-component type, a base exclusively for mica, a base exclusively for metallic (with bright powder such as aluminum, etc. for silver, etc. Depending on the type).

  In the bright paint application process, countless fine bright pieces reflecting light such as thermosetting acrylic resin paint (for example, fine powder of flake-like mica, etc.) were mixed on the surface of the colored coat layer 21 by spray coating. A glittering layer 22 is formed by applying a transparent coating) so that the film thickness when dried is about 20 μm. This bright paint application step is performed in the case of white coating, but may not be performed in the case of metallic coating.

  In the transparent top coat application step, for example, a solvent-type acrylic resin paint is applied to the surface of the glitter layer 22 by spray coating so that the film thickness when dried is about 30 μm, thereby forming the transparent top coat layer 23.

  In the baking step, the colored coating film 19 formed on the surface of the decorative surface layer portion 18 is heated, for example, at 80 ° C. for 30 minutes to dry and cure the colored coating film 19. Thereby, the manufacture of the roof molding 14 is completed. In addition, you may change a coating process suitably according to a coating color and coating specification.

  In baking from each of the above spray coatings, only the decorative surface layer 18 is exposed to the outside, the other portions are masked (not shown), and the elastic lips 26 and 27 are maintained in a free state. It is preferable to paint. As a result, it is possible to prevent the paint from adhering to the back surface of the decoration main body 17 and the elastic lips 26 and 27, and to prevent the above-described scratches and abnormal noises from occurring and to reduce the original performance of the elastic lips 26 and 27. No deformation occurs.

  In order to confirm the effect of the roof molding 14 of the present embodiment, the present inventors have confirmed the sample No. of the embodiment. 1 to 3 and the sample No. of the comparative example. 4 and 5 were evaluated. Each sample No. Table 1 shows the material composition of 1 to 5.

  Each sample No. In all of Nos. 1 to 5, the molding material of the decorative main body portion is TPO (1), and this TPO (1) contains a process oil component.

  Sample No. in Example 1-3, the molding material of the decorative surface layer portion is TPO (a), TPO (b), TPO (c), respectively. These TPO (a) -TPO (c) It contains no olefin elastomer component (rubber component) and polyol adhesive component. TPO (a) and TPO (b) are obtained by increasing the amount of elastomer component and adhesive component relative to TPO (c), and TPO (a) is obtained by reducing the hardness of TPO (b). .

  On the other hand, Sample No. In No. 4, the molding material of the decorative surface layer portion is SBC, and this SBC contains a styrene-based elastomer component and a polyol-based adhesive component.

Sample No. of Comparative Example In No. 5, the molding material for the decorative surface layer portion is R / TPO, and this R / TPO contains an olefin-based elastomer component but does not contain a process oil component. R / TPO generally refers to TPO in which a rubber component (EPDM or the like) is uncrosslinked.
Each sample No. Table 2 shows the evaluation results of 1 to 5.

  According to the evaluation results shown in Table 2, sample No. In No. 4, oil bleed occurred and the adhesion of the coating film was poor, so the judgment was x (bad). Since No. 5 has poor extrudability and the oil bleed-out property and the adhesion of the coating film cannot be evaluated, the determination is x.

  In contrast, sample No. Nos. 1 to 3 have moderate flexibility, but almost no oil bleed occurs, and the coating film has good adhesion, so the judgment is good (good).

  As is apparent from the above description, in the first embodiment, the decoration main body portion 17 is formed of TPO that contains the process oil component and has a larger mixing ratio of the rubber component (soft component) than the decoration surface layer portion 18. Therefore, the roof molding 14 can be provided with appropriate flexibility, and the roof molding 14 can be easily elastically bent and attached along the curved surface of the roof groove 13. Furthermore, since the decorative surface layer portion 18 is formed of TPO that does not contain a process oil component, the process oil component does not bleed on the surface of the decorative surface layer portion 18, and a colored coating film is formed on the surface of the decorative surface layer portion 18. 19 can be sufficiently adhered, and the surface of the roof molding 14 can be satisfactorily colored. Moreover, since the decorative surface layer portion 18 is thinner than the decorative main body portion 17, even if the decorative surface layer portion 18 has low flexibility, the influence is small, and the roof molding 14 as a whole should have sufficient flexibility. Can do. In addition, since both the decorative main body portion 17 and the decorative surface layer portion 18 are formed of TPO, they can be fused and integrated by coextrusion molding to be firmly bonded.

  Furthermore, in the first embodiment, the decorative surface layer portion 18 has a thickness dimension in the range of 0.05 to 2 mm and is equal to or less than ½ of the thickness dimension of the decorative main body portion 17. The decorative surface layer portion 18 can be made sufficiently thin with respect to 17, and the flexibility of the roof molding 14 can be ensured reliably.

  In Example 1, since the transparent topcoat layer 23 is laminated on the uppermost layer of the colored coating film 19, the colored coating film 19 can be protected by the transparent topcoat layer 23. 19 weather resistance, scratch resistance and chemical resistance can be improved.

  Further, in Example 1, since the glitter layer 22 is laminated between the colored coat layer 21 and the transparent top coat layer 23, the glitter coating 22 gives a deep design and gloss to the colored coating film 19. Can be granted.

  In the first embodiment, since the cap portion 30 is formed by bending a terminal (a portion corresponding to the first notch 29) in the longitudinal direction of the decorative portion 15, the surface portion of the cap portion 30 is formed. The decorative surface layer portion 18 can be formed to form a colored coating film 19 on the surface thereof, and the colored coating film 19 can be sufficiently adhered to the surface of the cap portion 30 in the same manner as other portions. The surface of the cap part 30 can also be satisfactorily colored.

  Next, Embodiment 2 of the present invention will be described with reference to FIG. However, substantially the same parts as those in the first embodiment are denoted by the same reference numerals, and the description will be simplified. The parts different from the first embodiment will be mainly described.

  In the first embodiment, the cap portion 30 is formed by bending the longitudinal end of the decorative portion 15, but in the present embodiment 2, the longitudinal end of the roof molding 14 is formed as shown in FIG. 6. A cap portion 39 having an internal space S formed by injection molding of the same TPO as that of the decorative surface layer portion 18 is fixed, and the colored coating film 19 is also formed on the surface of the cap portion 39.

  The “same TPO” is a TPO that has good adhesion to the base coat layer 20 described in the manufacturing method of Example 1 and does not contain process oil, and is suitable for injection molding. This refers to those with higher fluidity than TPO.

  In this case, with the end portion of the roof molding 14 set in the injection mold of the cap portion 39, TPO is injected into the injection molding die to form the cap portion 39. You may make it fuse | melt to 14 terminals. Alternatively, the cap part 39 may be formed by injection molding separately from the roof molding 14, and the cap part 39 may be fixed to the end of the roof molding 14 by fusion or adhesion.

  In the second embodiment, the cap portion 39 is formed of the same TPO as that of the decorative surface layer portion 18, and the colored coating film 19 is formed on the surface thereof. The colored coating film 19 can be sufficiently adhered to the surface, and a favorable colored coating can also be applied to the surface of the cap portion 39.

In each of the embodiments 1 and 2 described above, first, a roof molding intermediate product having a decorative portion 15 formed by fusion forming and forming a decorative main body portion 17 and a decorative surface layer portion 18 by extrusion molding is manufactured. After that, the colored coating film 19 was formed on the surface of the decorative surface layer portion 18 of the intermediate product of the roof molding to manufacture the roof molding 14, but the decorative main body portion 17 and the decorative surface layer portion 18 were formed by extrusion molding. The roof molding 14 may be manufactured by obtaining an intermediate product of the roof molding provided with the fused decorative portion 15 and forming the colored coating film 19 on the surface of the decorative surface layer 18 in the middle of the roof molding. .
In FIGS. 2 to 4 and 6 used in the description of Examples 1 and 2, the colored coating film 19 is not shown.

  Further, the scope of application of the present invention is not limited to a roof molding, and the present invention can also be applied to a molding mounted adjacent to a painted body panel. For example, the present invention can be applied integrally from the front end of the roof molding. Thus, the present invention may be applied to one that extends along the front pillar and reaches the cowl portion, or one that extends along the rear pillar continuously from the rear end of the roof molding.

  Further, the present invention may be applied to a body side molding or the like that is mounted on the side surface of the door panel or the side surface of the fender panel.

It is a perspective view of the roof molding and its peripheral part in Example 1 of the present invention. It is AA sectional drawing of FIG. It is BB sectional drawing of FIG. It is CC sectional drawing of FIG. It is a partial expanded sectional view of the decoration part of a roof molding. It is a longitudinal cross-sectional view of the terminal part of the roof molding of Example 2.

Explanation of symbols

DESCRIPTION OF SYMBOLS 11 ... Roof center panel ( roof panel), 12 ... Roof side panel ( roof panel), 13 ... Roof groove, 14 ... Roof molding (decoration trim material), 15 ... Decoration part, 16 ... Mounting part, 17 ... Decoration main-body part , 18 ... decoration surface layer part, 19 ... colored coating film, 20 ... base coat layer, 21 ... colored coat layer, 22 ... bright layer, 23 ... transparent topcoat layer, 24 ... trunk part, 25 ... root part, 26, 27 ... elastic Lip, 28 ... Core, 30 ... Cap part, 33 ... Mounting tool, 39 ... Cap part

Claims (11)

A decorative portion that is formed on the roof surface of the vehicle body in a curved manner centering on the vehicle interior side along the longitudinal direction of the vehicle and positioned on the outer surface side when mounted on a roof groove having a contact surface and a side wall. And a roof molding for a long vehicle made of thermoplastic elastomer, which is integrally formed with an attachment portion that is provided so as to protrude from the back surface side of the decorative portion and can be fixed to the roof groove ,
The decorative portion, by co-extrusion of the olefinic thermoplastic elastomer (hereinafter referred to as "TPO"), a decorative body portion of the decorative body portion is laminated on the outer surface side thinner than the decorative body portion The decorative surface layer part is formed and fused and integrated,
The decorative surface layer portion is formed up to the terminal at the end in the width direction of the decorative main body portion, and is formed so that the decorative main body portion contacts the contact surface of the roof groove when attached to the roof groove. And the thickness of the decorative surface layer portion is in the range of 0.05 to 2 mm and less than or equal to 1/2 the thickness of the decorative main body portion,
The attachment portion includes a trunk portion that supports the decoration portion, a root portion that extends from the root side of the trunk portion to both sides in the width direction, and an elastic lip that protrudes from the tip of the root portion toward both sides in the width direction. The elastic lip is formed so as to be elastically deformed when the roof molding is attached to the roof groove and to be in contact with and locked to the side wall of the roof groove.
The TPO that forms at least the elastic lip of the decorative main body and the mounting portion contains a process oil component, and has a higher rubber component mixing ratio than the TPO that forms the decorative surface layer. The TPO that forms the decorative surface layer part does not contain a process oil component, and a resin component having a higher mixing ratio and higher hardness than the TPO that forms the decorative main body part is used.
On the surface of the decorative surface layer portion, a colored coating film is formed in which at least a polyolefin-based or acrylic base coat layer and an acrylic-based or urethane-based colored coat layer are laminated in order from the decorative surface layer side. A roof molding for vehicles. The roof molding for vehicles according to claim 1, wherein the colored coating film has an acrylic or urethane transparent topcoat layer laminated on an upper layer side of the colored coating layer. In the colored coating film, a glitter layer made of an acrylic or urethane transparent resin containing innumerable fine glitter pieces that reflect light is laminated between the colored coat layer and the transparent top coat layer. The roof molding for vehicles according to claim 2 characterized by things. A cap portion that shields the terminal in the longitudinal direction of the mounting portion is formed by bending the terminal in the longitudinal direction of the decorative portion in a substantially L shape toward the back side, and the colored coating is also applied to the surface of the cap portion. The roof molding for vehicles according to any one of claims 1 to 3, wherein a film is formed. A cap portion formed by injection molding of the same TPO as the decorative surface layer portion is fixed to the longitudinal end of the decorative portion so as to shield the longitudinal end of the mounting portion, and the surface of the cap portion The roof molding for a vehicle according to any one of claims 1 to 3 , wherein the colored coating film is also formed. A decorative portion that is formed on the roof surface of the vehicle body in a curved manner centering on the vehicle interior side along the longitudinal direction of the vehicle and positioned on the outer surface side when mounted on a roof groove having a contact surface and a side wall. And a method for manufacturing a long roof molding for a thermoplastic elastomer, which is integrally formed with a mounting portion that is provided so as to protrude from the back side of the decorative portion and can be fixed to the roof groove. Because
The decorative portion, by co-extrusion of the olefinic thermoplastic elastomer (hereinafter referred to as "TPO"), a decorative body portion of the decorative body portion is laminated on the outer surface side thinner than the decorative body portion A decorative surface layer part is formed and fused and integrated,
The decorative surface layer portion is formed up to the terminal at the end in the width direction of the decorative main body portion, and is formed so that the decorative main body portion contacts the contact surface of the roof groove when attached to the roof groove. And the thickness of the decorative surface layer portion is in the range of 0.05 to 2 mm and less than or equal to 1/2 the thickness of the decorative main body portion,
The attachment portion includes a trunk portion that supports the decoration portion, a root portion that extends from the root side of the trunk portion to both sides in the width direction, and an elastic lip that protrudes from the tip of the root portion toward both sides in the width direction. The elastic lip is formed so as to be elastically deformed when the roof molding is attached to the roof groove so as to be in contact with and locked to the side wall of the roof groove,
The TPO that forms at least the elastic lip of the decoration main body and the attachment portion contains a process oil component, and has a rubber component mixing ratio larger than that of the TPO that forms the decoration surface layer portion. The TPO that forms the surface layer part does not contain a process oil component, and a roof molding intermediate product is manufactured by using a resin component having a higher mixing ratio and higher hardness than the TPO that forms the decorative body part,
Forming a colored coating film by laminating at least a polyolefin-based or acrylic base coat layer and an acrylic-based or urethane-based colored coat layer in order from the decorative surface layer side on the surface of the decorative surface layer portion of the roof molding intermediate product. A method of manufacturing a roof molding for a vehicle. A decorative portion that is formed on the roof surface of the vehicle body in a curved manner centering on the vehicle interior side along the longitudinal direction of the vehicle and positioned on the outer surface side when mounted on a roof groove having a contact surface and a side wall. And a method for manufacturing a long roof molding for a thermoplastic elastomer, which is integrally formed with a mounting portion that is provided so as to protrude from the back side of the decorative portion and can be fixed to the roof groove. Because
The decorative portion, by co-extrusion of the olefinic thermoplastic elastomer (hereinafter referred to as "TPO"), a decorative body portion of the decorative body portion is laminated on the outer surface side thinner than the decorative body portion A decorative surface layer part is formed and fused and integrated,
The decorative surface layer portion is formed up to the terminal at the end in the width direction of the decorative main body portion, and is formed so that the decorative main body portion contacts the contact surface of the roof groove when attached to the roof groove. And the thickness of the decorative surface layer portion is in the range of 0.05 to 2 mm and less than or equal to 1/2 the thickness of the decorative main body portion,
The attachment portion includes a trunk portion that supports the decoration portion, a root portion that extends from the root side of the trunk portion to both sides in the width direction, and an elastic lip that protrudes from the tip of the root portion toward both sides in the width direction. The elastic lip is formed so as to be elastically deformed when the roof molding is attached to the roof groove so as to be in contact with and locked to the side wall of the roof groove,
The TPO that forms at least the elastic lip of the decoration main body and the attachment portion contains a process oil component, and has a rubber component mixing ratio larger than that of the TPO that forms the decoration surface layer portion. The TPO forming the surface layer portion does not contain a process oil component, and the roof molding intermediate product manufactured by using a resin component having a higher mixing ratio and higher hardness than the TPO forming the decorative body portion. Prepare
Forming a colored coating film by laminating at least a polyolefin-based or acrylic base coat layer and an acrylic-based or urethane-based colored coat layer in order from the decorative surface layer side on the surface of the decorative surface layer portion of the roof molding intermediate product. A method of manufacturing a roof molding for a vehicle. The method for manufacturing a roof molding for a vehicle according to claim 6 or 7 , wherein the colored coating film is formed by laminating an acrylic or urethane transparent top coat layer on an upper layer side of the colored coating layer. . Before forming the colored coating film after obtaining the roof molding intermediate product, the terminal in the longitudinal direction of the attachment portion is bent in a substantially L-shape toward the back surface side of the decorative portion. 9. The method of manufacturing a roof molding for a vehicle according to claim 6 , wherein a cap portion that shields is formed, and the colored coating film is also formed on a surface of the cap portion. After the roof molding intermediate product is obtained and before the colored coating film is formed, the cap portion formed by injection molding of the same TPO as the decorative surface layer portion is attached to the longitudinal end of the decorative portion. The roof molding for a vehicle according to any one of claims 6 to 8 , characterized in that it is fixed so as to shield a terminal in a longitudinal direction of the portion, and the colored coating film is also formed on a surface of the cap portion. Production method. A decorative portion that is formed on the roof surface of the vehicle body in a curved manner centering on the vehicle interior side along the longitudinal direction of the vehicle and positioned on the outer surface side when mounted on a roof groove having a contact surface and a side wall. And a method for manufacturing a long roof molding for a thermoplastic elastomer, which is integrally formed with a mounting portion that is provided so as to protrude from the back side of the decorative portion and can be fixed to the roof groove. Because
The decorative portion, by co-extrusion of the olefinic thermoplastic elastomer (hereinafter referred to as "TPO"), a decorative body portion of the decorative body portion is laminated on the outer surface side thinner than the decorative body portion A decorative surface layer part is formed and fused and integrated,
The decorative surface layer portion is formed up to the terminal at the end in the width direction of the decorative main body portion, and is formed so that the decorative main body portion contacts the contact surface of the roof groove when attached to the roof groove. And the thickness of the decorative surface layer portion is in the range of 0.05 to 2 mm and less than or equal to 1/2 the thickness of the decorative main body portion,
The attachment portion includes a trunk portion that supports the decoration portion, a root portion that extends from the root side of the trunk portion to both sides in the width direction, and an elastic lip that protrudes from the tip of the root portion toward both sides in the width direction. The elastic lip is formed so as to be elastically deformed when the roof molding is attached to the roof groove so as to be in contact with and locked to the side wall of the roof groove,
The TPO that forms at least the elastic lip of the decoration main body and the attachment portion contains a process oil component, and has a rubber component mixing ratio larger than that of the TPO that forms the decoration surface layer portion. TPO forming the surface layer portion does not contain a process oil component, and has a higher resin component mixing ratio and higher hardness than the TPO forming the decorative main body portion, and is used for a vehicle roof molding. Manufacturing method.

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