JP5962453B2 - Multilayer molded body with coating and method for coating multilayer molded body - Google Patents

Description

  The present invention relates to a coated multilayer molded body and a method for coating a multilayer molded body.

  In recent years, resin windows have been increasingly used for automobile panorama roofs, back doors, quarter windows and the like. Some resin windows are manufactured by so-called two-color molding, in which a transparent resin is molded into a plate shape, and then a resin that becomes a window frame is injection-molded on one surface of the transparent resin. The two-layer molding is used for the purpose of performing injection molding of the window frame and the plate-like material separately, for example, in order to avoid the appearance from being damaged due to sink marks generated in the thick part of the window frame during molding. . The two-layer molding includes so-called two-color molding in which the resin that becomes the window frame is made of a material different from the plate-like resin.

  It is also known that a film having various functions such as a hard coat layer and an ultraviolet / infrared cut layer is formed on the surface of the resin window.

  Various known methods can be used for coating the resin window. However, in the case of applying a droplet-like paint such as spray application, fine irregularities of the paint are easily formed on the surface of the resin window, the appearance is deteriorated, and the function of the film may be deteriorated. .

  Therefore, as a method for coating a resin window, a flow coat method in which a paint is poured from above onto a resin window standing on a jig, a dip method in which the resin window is immersed in a paint bath, and the like are suitable.

  However, even when the above-described flow coating method or dip method is used, there are the following problems when a film is formed on a resin window having a window frame by two-layer molding. In other words, when the resin that becomes the window frame is located on the upper side of the transparent resin that becomes the window, a phenomenon that the paint droops in a streaky manner from the resin to the transparent resin and causes the film to become shaded (so-called sag) There was a problem that occurred.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a multilayer molded body with a coating and a coating method for the multilayer molded body in which sagging is suppressed during coating.

  The multilayer molded body with a coating according to the present invention includes at least a plate-like first resin material, and a frame-like second resin material surrounding the first resin material on one surface of the first resin material, A multi-layer molded body with a coating, in which a coating integrally covering the first resin material and the edge of the second resin material is formed on one surface of the first resin material, The edge part of 2 resin material is comprised by the non-bending surface without a bending part between the outer edge position of a film, and the boundary position of a 2nd resin material and a 1st resin material.

  The inventors have found that when there is a bent portion between the outer edge position of the film and the boundary position between the second resin material and the first resin material, a paint pool is formed in the bent portion when the film is formed, and the bent It was found that the paint accumulated in the part was caused by the time difference and was one of the causes of dripping. Therefore, in the multilayer molded body with a coating according to the present invention, the second bent portion has no bent portion between the outer edge position of the coating and the boundary position between the second resin material and the first resin material. By configuring the edge of the resin material, the paint is difficult to accumulate, and dripping is effectively suppressed.

  Further, the non-bending surface at the edge of the second resin material may be a curved surface. If the non-bending surface is a curved surface, the paint is difficult to accumulate, and dripping is effectively suppressed.

  The method for coating a multilayer molded body according to the present invention includes at least a plate-like first resin material and a frame-like second resin material surrounding the periphery of the first resin material on one surface of the first resin material. The multilayer molded body is formed by forming a film integrally covering the first resin material and the edge of the second resin material on one surface of the first resin material of the multilayer molded body constituted by In the method, when applying the coating material to be a film, the coating material is applied so as to flow down from the upper edge of the second resin material toward the first resin material, and the second resin material and Application is started from a position where there is no bent portion up to the boundary position with the first resin material.

  In such a multilayer molded body coating method, since there is no bent portion between the position where the coating of the coating material to be coated starts and the boundary position between the second resin material and the first resin material, The coating applied so as to flow down from the upper edge of the second resin material toward the first resin material is unlikely to accumulate, and dripping is effectively suppressed.

  Moreover, the aspect which apply | coats a coating material by the flow coat method may be sufficient. According to the flow coat method, the coating material flows down toward the first resin material by pouring the coating material on the upper edge of the second resin material.

  ADVANTAGE OF THE INVENTION According to this invention, the coating method of the multilayer molded object with a film by which suppression of dripping at the time of a coating was aimed at and the multilayer molded object is provided.

FIG. 1 is a schematic diagram showing a panoramic roof according to an embodiment of the present invention. FIG. 2 is a cross-sectional view of the panoramic roof shown in FIG. 1 taken along the line II-II. FIG. 3 is a cross-sectional view of a window frame material according to the prior art. FIG. 4 is a cross-sectional view showing a window frame member in a mode different from that in FIG.

  Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the description, the same reference numerals are used for the same elements or elements having the same function, and redundant description is omitted.

  FIG. 1 is a view showing a panorama roof 1 of an automobile which is a two-color molded body according to an embodiment of the present invention, and is a view showing a state where the panorama roof 1 is leaned against a jig (not shown).

  The panorama roof 1 includes a plate-like window material (first resin material) 10 made of a transparent resin and a frame-like window frame material (second resin material) 20 made of a black resin. Yes. This panoramic roof 1 is a so-called two-color molded body (which is a kind of multilayer molded body) obtained by injection molding a black resin to be a window frame material 20 on one surface of a transparent resin to be a window material 10. is there.

  As shown in FIG. 1, the window frame member 20 is arranged so as to surround the periphery of the window member 10 on the surface 10 a on the passenger compartment side of the window member 10. More specifically, the window frame member 20 has a shape in which two rectangular openings are arranged side by side, and the window member 10 is exposed from each of the openings.

  As shown in FIG. 2, a hard coat layer (film) 30 having functions such as weather resistance, durability, and scratch resistance is formed on the panorama roof 1. The hard coat layer 30 integrally covers the cabin-side surface 10 a of the window member 10 exposed from the opening of the window frame member 20 and the edge 22 around the opening of the window frame member 20.

  Such a hard coat layer 30 can be formed, for example, by applying a paint using a flow coat method. Hereinafter, a method of forming the hard coat layer 30 using the flow coat method will be described.

  When forming the hard coat layer 30, as shown in FIG. 1, the paint 50 to be the hard coat layer 30 is poured from the hose 40 in a state where the panorama roof 1 is leaned substantially vertically on the jig. .

  At this time, the paint 50 is discharged from the hose 40 toward the above-described outer edge position P of the upper edge portion 22 of the window frame member 20 (precisely, a position corresponding to the outer edge position). Then, the coating material 50 starts to be applied from the outer edge position P, and the coating material 50 flows down toward the window member 10 located below the edge portion 22. As a result, the paint 50 discharged from the hose 40 is applied so as to integrally cover the edge 22 of the window frame material 20 and the window material 10, and the paint 50 is dried, whereby the hard coat layer described above is applied. 30 is formed.

  And in the edge part 22 of the window frame material 20, the surface 22a between the outer edge position P of the hard-coat layer 30 and the boundary position Q of the window frame material 20 and the window material 10 is a non-bending surface without a bending part. As a curved surface.

  The inventors have obtained the following knowledge as a result of diligent research regarding the suppression of dripping at the boundary between the window material and the window frame material.

  That is, like the window frame material 120 according to the prior art shown in FIG. 3, at the edge 122, between the outer edge position P of the hard coat layer 30 and the boundary position Q between the window frame material 120 and the window material 10. When the bent portion 124 is present, the paint pool 32 is likely to be generated in the bent portion 124 when the hard coat layer 30 described above is formed. The paint accumulated in the paint reservoir 32 remains in the paint reservoir 32 for a certain period of time due to the influence of surface tension and the like, and flows down with a time difference later than other paints. The paint flowing down with this time difference disturbs the uniformity of the flow rate of the paint, and as a result, the density of the paint is a factor in dripping.

  Therefore, the inventors have newly found that the edge portion 22 of the window frame member 20 is constituted by a non-bending surface 22a. Accordingly, since there is no bent portion in which the paint 50 is accumulated, naturally, the paint accumulation is hardly generated, and the paint 50 smoothly flows down from the edge portion 22 of the window frame member 20, so that drooping is effectively suppressed.

  Thus, in panorama roof 1, since drooping is effectively suppressed as described above, it is not necessary to cover the drooping with any member, and the degree of freedom of design is high. For this reason, the use of a panoramic roof as a resin has been promoted, and the weight of automobiles has been reduced, leading to a reduction in environmental burden.

  FIG. 4 is a view showing a window frame member 20A having a different form from the window frame member 20 described above.

  At the edge portion 22 of the window frame member 20A, a non-bent surface 22a between the outer edge position P of the hard coat layer 30 and the boundary position Q between the window frame member 20A and the window member 10 is formed as a flat surface. . Specifically, the non-bending surface 22a is an inclined surface that is inclined with respect to the surface 10a of the window member 10 so as to become gradually thinner toward the edge.

  Like the window frame member 20A, even if the non-bent surface 22a of the edge 22 is a flat surface, there is no bent portion where the paint 50 is accumulated, like the curved non-bent surface 22a of the edge 22 of the window frame member 20. Therefore, paint accumulation is less likely to occur, and dripping is effectively suppressed.

  However, the panorama roof 1 is a two-color molded body, and the window frame members 20 and 20A are formed by injection molding. Therefore, if there is a thin portion, it is difficult for the resin to enter there. Therefore, from the viewpoint of moldability of injection molding, the window frame material 20 is more preferable than the window frame material 20A in which a thin portion is generated at the tip portion of the non-bent surface 22a.

  In addition, this invention is not limited to the said embodiment, A various deformation | transformation is possible.

  For example, the film is not limited to a hard coat layer, and may be a film such as an ultraviolet cut layer or an infrared cut layer.

  The formation of the film is not limited to the application of the paint by the flow coat method, but may be the application of the paint by the dip method. Even when the dip method is used, when the paint is pulled up, since the paint flows down from the window frame material 20 to the window material 10 as in the case of the flow coating method, there is no bending portion where the paint accumulates, and this is effective. Is suppressed.

  Furthermore, the two-color molded body is not limited to a panoramic roof, and may be a resin window such as a back door or a quarter window, or may have one or three or more resin windows. Good.

  Further, the present invention is not limited to the two-color molded body (two-layer molded body) of the above-described embodiment, and is a multilayer molded resin window (that is, multilayer molded) in which a plate-like window material and a window frame material are separately injection-molded. Body). For example, the plate-like window material and the window frame material can be applied to a resin window made of the same material. Further, the plate-like window material itself may have a structure of two or more layers, or may be applied to a resin window of three or more layers adopting a structure of two or more layers in order to increase the thickness of the window frame material.

  DESCRIPTION OF SYMBOLS 1 ... Panorama roof, 10 ... Window material, 20 and 20A ... Window frame material, 22 ... Edge part, 22a ... Unbent part, 30 ... Hard-coat layer, 50 ... Paint.

Claims (4)

At least a plate-shaped first resin material and a frame-shaped second resin material surrounding the first resin material on one surface of the first resin material, and the first resin material A multi-layer molded body with a coating in which a coating that integrally covers the first resin material and the edge of the second resin material is formed on the one surface of the resin material,
The edge part of the second resin material is constituted by a non-bent surface having no bent part between the outer edge position of the coating and the boundary position between the second resin material and the first resin material. Multi-layer molded body with coating.   The multilayer molded body with a film according to claim 1, wherein the non-bending surface at the edge of the second resin material is a curved surface. A multilayer molded body composed of at least a plate-shaped first resin material and a frame-shaped second resin material surrounding the first resin material on one surface of the first resin material, A method of coating a multilayer molded body, wherein a film that integrally covers the first resin material and an edge of the second resin material is formed on the one surface of the first resin material,
When applying the coating material to be the film, the coating material is applied so as to flow down from the upper edge of the second resin material toward the first resin material, and the second resin material and A method for coating a multilayer molded body, wherein coating is started from a position where there is no bent portion between the first resin material and the boundary position.   The method for coating a multilayer molded article according to claim 3, wherein the paint is applied by a flow coating method.

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