JP2011143560A - Resin component for building material and molding method thereof - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To eliminate the releasability of a film covering the surface of a cap which blocks the upper end of a hollow part of a support and thereby, allow the film to stay welded in one piece and highly durable. <P>SOLUTION: First, a cap A is molded by in-mold forming, and the surface of the cap A is covered with a highly weatherable film 3 with an edge grain pattern etc. formed on the surface. In this case, the film 3 is arranged by turning it into the outer circumferential end part of the back surface of a blocking plate of the cap A from the face surface of the plate 2 through the side surface of the plate. Further, on the back surface of the blocking plate 2, the apex of the turning-in margin is sealably inserted into the root part of a fitting leg 22 which can fit into the hollow part of the support 1 arranged upright on the back surface of the blocking plate. Thus the releasability of the film which is welded in one piece, is eliminated by inhibiting the exposure of the end part of the film 3. Finally, the in-mold forming of the cap A is performed using a wrapping sheet 3 of the support 1 as it is, so that the support 1 with a grain-patterned cap 3 can be obtained. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  For example, the present invention can be suitably applied to various building material products such as a cap for closing a longitudinal end portion of a building material using an aluminum extruded material and a connecting member for connecting an end portion of the building material. The present invention relates to a building material resin part having a film formed on the surface thereof, and to a molding method thereof.

  For example, as a building material using the above-mentioned aluminum extruded material, Patent Document 1 discloses that a door body in which a hollow vertical fence and a horizontal fence are assembled and a large number of vertical lattice materials are arranged in parallel inside is hollowed via a hinge. A gate suspended from and supported by a column is shown, and a molded cap that closes these hollow portions is arranged and used on the hollow vertical rod and the hollow column of the gate. The fitting leg is fitted and fixed to the upper end in the longitudinal direction of the column, and the hollow portion is closed by the closing plate.

JP 2002-339676 A

  The molded cap of Patent Document 1 is assumed to be formed by resin injection molding. In general, this type of molded cap is supposed to ensure durability by using a highly weather-resistant resin suitable for outdoor use. At the same time, it is colored by adding a pigment so as to exhibit a color tone of, for example, gray or brown so that the color tone of the vertical extrusion of the aluminum extrusion material and the secondary electrolytic coloring of the support column is as much as possible.

  However, recently, by wrapping a film with colored patterns such as grids and plates on the surface of the extruded aluminum material, while ensuring high accuracy, workability, durability, etc. by the extruded aluminum material, , There is a request to ensure that the material is an aluminum extruded material, and to ensure a good appearance of the building material, in this case, when using the molding cap formed by the injection molding, the film wrapping building material and This tends to cause a sense of discomfort. For example, when the gate is formed as a film-wrapped one, the entire gate may have a good appearance, but the upper end of the gate receiving the human eye, that is, the vertical shaft of the door body, the molding cap of the column is simply colored. By being made of a color tone, the overall beauty tends to be lost and the aesthetic appearance is easily lost.

  On the other hand, if the molded cap is covered with a film having a pattern common to the wrapping film of the building material on the aluminum extruded material, the problem that impairs the aesthetics of the building material can be solved. However, in this case, it is sufficient to cover the surface and side surfaces of the closing plate that protrudes upward from the building material and exposes the resin portion. For the long-term use, for example, due to the influence of rainwater and ultraviolet rays for outdoor use, the possibility of peeling off at the edge of the film is unavoidable. It is likely to cause damage to the appearance and damage the appearance, eventually resulting in a problem of time, which also impairs the appearance.

  The present invention has been made in view of such circumstances, and the problem to be solved is that it can be produced as easily and reliably as possible, including when used together with the above-mentioned film-wrapped building material, and peeling of the end portion. The object of the present invention is to provide a resin component for a film-covered building material having a durability that can withstand long-term use, and to provide a molding method thereof.

  In accordance with the above-mentioned problems, the present invention is mass-productive including the case of small parts by placing a film on the surface of a resin part by in-mold molding (also referred to as insert molding or film insert molding). On the other hand, the film is folded and arranged at the outer peripheral edge of the back surface of the resin part, and the end of the folding allowance is enclosed and sandwiched inside the molded resin, thereby completely eliminating the possibility of peeling of the edge. In other words, the invention according to claim 1 is a resin part in which a film is in-molded on the surface, and the film is folded and arranged at the outer peripheral edge of the back surface of the resin part. At the same time, the resin material part for building materials is characterized in that the tip of the folding allowance is enclosed and held in a molded resin.

  In addition to the above, the invention described in claim 2 is the above-mentioned resin component, wherein the enclosing clamping of the folding allowance is performed simultaneously by the in-mold molding itself. 2. The resin component for building material according to claim 1, wherein the resin component for building material according to claim 1 is formed only by in-mold molding, and encapsulating and sandwiching in the molding resin at the tip of the folding margin is performed in the molding resin at the time of the in-mold molding. It is a thing.

  In addition to the above, the invention described in claim 3 performs the molding of resin parts by using both in-mold molding and two-color molding, and encloses and inserts the folding allowance with two-color molding resin for in-mold molding. The resin part is formed by the in-mold molding and the subsequent two-color molding so as to be performed at the time of the two-color molding with the molding resin of the molding, and the tip of the folding margin is formed. 2. The resin component for building materials according to claim 1, wherein the encapsulating sandwiching in the molding resin is performed between the molding resin of the in-mold molding and the two-color molding at the time of the two-color molding.

  In addition to the above, the invention described in claim 4 has a configuration in which the resin part has a general part shape as a building material part and can easily and reliably enclose and hold the folding allowance. In order to achieve this, the resin component is provided with a plate-like surface portion, and a back-side upright portion in which the outer peripheral end portion is left in the plane of the back surface of the plate-like surface portion, and the film is folded. The resin component for building material according to claim 1, 2 or 3, wherein enclosing clamping of the leading edge is performed between the back surface of the plate-like surface portion and the back surface standing portion at the time of forming the back surface rising portion. It is.

  In addition to the above, the invention according to claim 5 is suitable for building materials for film wrapping by performing the resin parts using the film having the same pattern as the film for the wrapping building material. As described above, the resin part is fitted to the end portion in the longitudinal direction of the building material processed from the aluminum extruded material by using the plate-shaped surface portion as a closing plate and the back surface rising portion as a fitting leg. 5. A molded cap that fits and fixes a leg and closes a hollow portion thereof with a closing plate, and a film having a common pattern with a wrapping film in which the film is applied to the surface of the building material. This is a resin component for building materials.

  In addition to the above, the invention according to claim 6 is a connection component suitable for use so that the resin component is connected so as to connect the longitudinal ends of the building material linearly or at a corner. The resin component is provided with a connection surface portion, and an end protrusion portion that protrudes from both end portions of the connection surface portion so as to leave the outer peripheral end thereof, and encloses and clamps the leading end of the folding margin of the film. 4. The resin component for building material according to claim 1, wherein the back surface protruding portion is formed between the back surface of the both end portions of the connection surface portion and the protruding portion of the back surface.

  In addition to the above, the invention according to the seventh aspect of the present invention, in addition to the above, for example, when it is used in an upper high place, the folding of the film and the encapsulation of the tip of the film are omitted so that the arrangement of the film at an invisible part is omitted. In order to assume that the sandwiching was partially performed, this was performed by arranging the folding arrangement of the film on the outer periphery of the back surface of the resin component and the enclosing sandwiching in the molding resin at the front end of the folding with respect to a part of the outer periphery of the rear surface The resin component for building material according to claim 1, 2, 3 or 6, wherein the resin component for building material is formed.

  The invention according to claim 8 provides a method for molding a resin part for building material in which the in-mold molding and the encapsulating tip of the folding tip at the time of the in-mold molding are provided. A method of molding a resin part to be molded, wherein a molded film in which an upright wall having an I-shaped or L-shaped cross section facing the back surface is preformed and arranged on the outer periphery is used, and the tip of the upright wall of the molded film is placed In-mold molding is carried out in a state of being held by a slide guide toward the in-plane direction, the standing wall is folded and arranged at the outer peripheral end of the back surface of the resin component, and the leading end of the folding margin is enclosed and held in the molding resin. This is a molding method of resin parts for building materials.

  According to a ninth aspect of the present invention, there is provided a method for molding a resin component for a building material, wherein the in-mold molding and the two-color molding are performed, and the enclosing pinching of the folding end is performed between the molding resin for the in-mold molding and the molding resin for the two-color molding. This is a method of molding a resin component in which a film is in-mold molded on the front surface, and a standing wall having an I-shaped or L-shaped cross section facing the back surface is preformed and arranged on the outer periphery. A surface portion in which a molded film is used, the standing wall tip of the molded film is in-molded in a state of being held by a slide guide in the in-plane direction, and the standing wall is folded and arranged at the outer peripheral end of the back surface of the resin component. Then, an upright part is formed in the molding part by two-color molding, and the folding margin tip that is folded and arranged at the outer peripheral edge of the back surface of the surface part is in-mold molding and two-color molding. It is obtained by the molding method of building materials for the resin component, which comprises encapsulated sandwiching between molding of the molding resin.

  The invention according to claim 10 provides a method for molding a resin part in a form in which the film is partially folded and sealed at the front end thereof. The method for molding a resin component for building materials according to claim 8 or 9, wherein the folding arrangement and the encapsulating clamping in the molding resin at the leading end of the folding are performed at a part of the outer peripheral end of the back surface. is there.

  The present invention uses these as the gist of the present invention and as means for solving the above problems.

  Strictly speaking, a film and a sheet may be distinguished from each other. However, in the present invention, the term “film” is used in a sense including a thickness included in the concept of a sheet.

  Since the present invention is configured as described above, the invention according to claim 1 is excellent in mass productivity, including the case of small parts, by placing the film on the surface of the resin part by in-mold molding. On the other hand, when the film is used with the building material subjected to the film wrapping by folding and arranging the film at the outer peripheral end of the back surface of the resin part and enclosing and holding the tip of the folding allowance inside the molding resin. In addition, it is possible to provide a resin component for a film-covered building material that can be produced as easily and surely as possible, completely eliminates the possibility of peeling off the end, and has durability to withstand long-term use.

  In addition to the above, the invention described in claim 2 may be such that the enclosing clamping of the folding allowance is performed simultaneously by the in-mold molding itself.

  In addition to the above, the invention described in claim 3 performs the molding of resin parts by using both in-mold molding and two-color molding, and encloses and inserts the folding allowance with two-color molding resin for in-mold molding. It can be performed at the time of the two-color molding with a molding resin.

  In addition to the above, the invention described in claim 4 has a configuration in which the resin part has a general part shape as a building material part and can easily and reliably enclose and hold the folding allowance. Can be.

  In addition to the above, the invention according to claim 5 is suitable for building materials for film wrapping by performing the resin parts using the film having the same pattern as the film for the wrapping building material. Can be.

  In addition to the above, the invention according to claim 6 can also be a connecting component suitable for using the resin component so as to connect the longitudinal ends of the building material linearly or at the corner. .

  In addition to the above, the invention according to the seventh aspect of the present invention, in addition to the above, for example, when it is used in an upper high place, the folding of the film and the encapsulation of the tip of the film are omitted so that the arrangement of the film at an invisible part is omitted. The sandwiching may be performed partially.

  The invention according to claim 8 can provide a method for molding a resin component for building material in which the in-mold molding and the enclosing tip of the folding tip during the in-mold molding are performed.

  According to a ninth aspect of the present invention, there is provided a method for molding a resin component for a building material, wherein the in-mold molding and the two-color molding are performed, and the enclosing pinching of the folding end is performed between the molding resin for the in-mold molding and the molding resin for the two-color molding. Can be provided.

  The invention according to claim 10 can provide a method for molding a resin component in a form in which the film is partially folded and the leading end thereof is encapsulated and sandwiched.

It is a perspective view of the partial fracture | rupture which shows a support | pillar and the cap of the upper end. It is a bottom view of a cap. It is an enlarged side view of a cap. It is an expansion longitudinal cross-sectional view of a cap. It is a partial expanded longitudinal cross-sectional view which shows the film coating of a cap. It is a perspective view of the back surface side of a molded film. It is a longitudinal cross-sectional view which shows the film mounting state to a metal mold | die.

  Hereinafter, the present invention will be described in more detail with reference to the example of the drawings. A is a resin part having a film in-mold formed on the surface, and the resin part A has the film 3 folded and arranged at the outer peripheral edge of the back surface. In addition, in this example, the resin component A has a plate-shaped surface portion and a plate-shaped surface portion on the back surface of the outer peripheral end. And a back surface standing portion that is erected while leaving a portion, and enclosing and sandwiching the leading end of the folding margin of the film 3 is performed between the back surface of the plate-shaped surface portion and the back surface standing portion at the time of forming the back surface standing portion. At this time, the resin part A of the present example has a plate-shaped surface portion as the closing plate 2 and a back upright portion as the fitting leg 22, whereby the longitudinal end portion of the building material processed from the aluminum extruded material The fitting leg 22 is fitted and fixed, and the hollow portion is closed with a closing plate, and the film 3 is a film having a common pattern with the wrapping film applied to the surface of the building material.

  That is, the resin part A used as a cap has a standing height in a pillar fence, not shown in the figure, which is a building material such as a pillar, a saddle member, a frame member, etc., which has been processed by cutting an aluminum extruded material. Differently arranged at a number of predetermined intervals, for example, it is configured to be used to close the upper end of the hollow portion of the support column 1 made of 12 cm square aluminum hollow material. At this time, the support column 1 of this example is On the outer peripheral surface, a wrapping film 3 having a wood pattern such as a wood grain or a plate is wrapped over the entire surface. The wrapping film is, for example, a non-polymer excellent in weather resistance by having a clear layer of polypropylene and a urethane top layer, etc., laminated on a colored polyethylene base through a wood pattern ink layer such as a mesh or a plate. It is based on a vinyl chloride film (non-vinyl chloride sheet).

  The closing plate 2 in the resin part A used for the support column 1 has a planar shape that matches the cross-sectional shape of the support column processed from a rectangular, rectangular, circular, etc. aluminum extruded material. 12 cm wide and 3 mm thick, and at this time, the closing plate 2 has a back surface outer peripheral end portion 21 on the back surface thereof that matches or is slightly wider than the wall thickness of the column 1. The fitting leg 22 having a predetermined height having an outer shape matched to the shape of the hollow portion of the support column 1 is integrally protruded and provided in the hollow portion of the support column 1 so as to fit in a close fitting manner, for example. As a thing.

  In the present example, the back surface outer peripheral end 21 has a narrow width of 2 mm and is matched to the thickness of the support column 1. The side surface of the closing plate 2 is in contact with the surface of the support column 1, and the fitting leg 22 is, for example, within the surface of the back surface of the closing plate 2 leaving the outer peripheral edge 21. The protruding height is about 2 cm, the wall thickness is about 1 to 2 mm, and it is placed upright so as to form a wall that surrounds the back surface, and a rib 23 for tight fitting with the support column 1 is provided on the outer surface for reinforcement on the inner surface The semicircular ribs 23 are arranged respectively.

  At this time, the resin component A has the surface of the closing plate 2 coated with the film 3 by in-mold molding, and the film 3 is a wrapping film wrapped around the support column 1, that is, The non-vinyl chloride film is used as it is to cover it, thereby exhibiting a wood-tone integrated appearance in which the support column 1 and its cap are unified in the same wood pattern. At this time, the coating of the film 3 is performed so as to be folded and arranged so as to reach the rear surface outer peripheral end portion 21 through the side surface of the closing plate 2, and the folding margin tip is enclosed and sandwiched in the molding resin. The integrated coating is formed by forming the resin part A only by the in-mold molding, and enclosing and sandwiching the inner end of the folding allowance in the molding resin at the time of the in-mold molding, Further, the resin part A is formed by the above-mentioned in-mold molding and the subsequent two-color molding, and the resin resin A is encapsulated in the molding resin at the leading end of the folding margin. In this way, the leading end of the folding back of the film 3 from the front surface is inserted and integrated into the root portion with the fitting leg 22 in the surface of the back surface. As such, there as it was the inclusion pinching.

  If this is explained by the molding method of the resin component A, the resin component A uses a molded film 3 in which an upright wall 32 having an I-shaped or L-shaped cross section facing the back surface is arranged on the outer periphery, In-mold molding is performed in a state where the tip of the standing wall 32 of the molded film 3 is held by a slide guide in the in-plane direction, and the standing wall 32 is folded and arranged at the outer peripheral end 21 of the back surface of the resin component A. Molding is performed by a molding method in which the leading end of the folding margin is encapsulated and sandwiched in the molding resin, or the surface portion where the upright wall 32 is folded and arranged in the outer peripheral end 21 of the back surface of the resin part A is molded. Next, the standing wall 32 is formed by two-color molding at the molding portion, and the folding margin tip that is folded and arranged at the outer peripheral end portion 21 of the front surface portion is formed in-mold at the time of the two-color molding. If by any of the molding methods of encapsulating sandwiched between the molding resin of the two-color molding, as performing the molding.

  That is, in the present example, the molded film 3 includes, for example, a surface portion 31 that matches the planar shape of the blocking plate 2 and the thickness of the blocking plate 2 toward the back surface of the outer periphery of the surface portion 31, that is, The I-shaped or L-shaped standing wall 32 erected and arranged with the total thickness of the side surface and the width of the folding margin with respect to the outer peripheral end portion 21 on the back surface forms, for example, a shallow box shape. The surface portion 31 of the present example is a flat square having one side of 12 cm, and the standing wall 32 is formed with the thickness of the 3 mm closing plate 2, the width of the outer peripheral end portion 21 of the back surface of 2 mm, and the enclosing clamping For example, the corner of the surface portion 31 forms a curved surface with a predetermined radius according to the corner shape of the corners of the support column 1 or the closing plate 2. It is.

  The molded film 3 is formed by, for example, preforming by vacuum forming, and this is used as an insert film. The molded film 3 is placed in the mold with its back surface facing the nozzle side. The in-mold molding is performed by performing resin filling by resin injection from a nozzle, and the in-mold molding and two-color molding are performed to mold the resin component.

  At this time, in order to effectively and appropriately hold and hold the folding margin of the film, a movable film guide 41 is arranged in one mold 4 on the film set side in the mold, and the film guide 41 The upright wall 32 of the molded film 3 is held and the resin part A is molded. The movable film guide 41 holds the standing wall 32 of the molded film 3 set in the mold 4 by clamping the mold so that, in the case of an I-shape, it is curved in the film in-plane direction. In the case of the L-shape, the tip is slightly protruded in the in-plane direction and is held in a state where this is suppressed. In the molded film 3 having the above-described flat rectangular shape in this example, four film guides 41 are used so as to be simultaneously performed from the four directions on the outer periphery according to the planar shape of the film. For example, 41 is urged in the immersion direction to the above-mentioned one mold 4 so that they are simultaneously slid into the inner surface of the film 3 by mold clamping, and the other mold is pressed by mold clamping. Thus, it is arranged so as to be slidable so as to protrude in the in-plane direction.

  In this example, the holding by the film guide 41 is performed from the surface portion 31 of the molded film 3 at a position of 3 mm of the thickness of the closing plate 2, that is, the thickness of the side surface, and protruding into the surface. The width is set to 2 mm, which is 1 mm narrower than the remaining 3 mm, and the resin part A is molded only by the in-mold molding, and the protrusion width into the surface is the remaining width. In this case, in-mold molding and subsequent two-color molding of the resin part A are performed.

  The outer peripheral groove formed on the outer periphery along the surface portion 31 of the film 3 and the mold 4 by injecting the resin from the nozzle while the standing wall 32 of the molded film 3 is held by the film guide 41. It is possible to form a folding margin from the front surface of the closing plate 2 through the side surface thereof to the back surface outer peripheral end portion 21, so that the molded film 3 can be welded and integrated with the closing plate 2. In the case where the projecting width of the film guide 41 is 2 mm, which leaves the width of the enclosing sandwich, the fitting leg in which the tip of the folding allowance is erected on the inner side of the back surface outer peripheral portion 21 only by in-mold molding. A width of 1 mm at the tip can be enclosed and sandwiched in 22. Further, in the case where the projecting width of the film guide 41 is 3 mm, which does not particularly set the width of the enclosing sandwich, by performing two-color molding in addition to the in-mold molding, for example, the two-color molding is performed. By using a movable film guide for the back surface of the closing plate 2 formed in the same manner as described above, for example, with a protruding width of 2 mm, for example, the tip of the folding margin is With a width of 1 mm, it can be encapsulated and sandwiched between the rear surface of the in-mold molded closing plate 2 and the molding resin of the two-color molded fitting leg 22.

  That is, when molding the resin part A, by using the movable film guide 41, the upright wall 32 of the preformed molded film 3 can be controlled, and the molded film 3 can be easily and securely sealed. In addition, it becomes possible to simultaneously form the resin part A and enclose and hold the turn-around margin of the film 3 by in-mold molding or a combination of this and two-color molding.

  The resin part A formed as described above is covered by welding integrated lapping so that the film 3 reaches from the front surface to the back surface outer peripheral end portion 21 through the side surface of the closing plate 2. Since the end portion is encapsulated and sandwiched in the molding resin as the tip of the folding allowance, by ensuring a high degree of integrity between the film 3 and the resin part A, it is possible to eliminate the possibility of peeling. By fitting the fitting leg 22 into the hollow portion as the cap of the support column 1, the end portion of the film 3 is not exposed to the outside, so that the end portion is deteriorated by the influence of rainwater, ultraviolet rays, or the like. Therefore, it is possible to ensure the film covering performance along the durability of the building material by ensuring the aesthetic appearance of the film appearance for a long time without causing the peeling.

  Although the illustrated example is as described above, the resin component for building material is provided with a connection surface portion, and an end protrusion portion that protrudes from the both end portions of the connection surface portion so as to leave the outer peripheral end portion, and It is intended for building material connection, in which enclosing clamping of the leading edge of the film fold is performed between the back surface of the both end portions of the connection surface portion and the back surface protruding portion at the time of forming the back surface protruding portion. Of the resin part back to the outer periphery and the encapsulated sandwich in the molding resin at the front end of the fold is performed on a part of the outer peripheral end of the back surface, in this case, the molding method of the resin part, Folding placement of resin film on the outer periphery of the back surface and enclosing and sandwiching in the molding resin at the front end of the fold shall be performed in a part of the outer peripheral edge of the back surface. Exterior products and In the practice of the present invention, including the use of building materials for opening members such as doors, etc., each specific shape, structure, material, and relationship thereof, such as resin parts, films, and folding allowances thereof Specific molding methods such as addition to these, in-mold molding, two-color molding, and the like can be in various forms as long as they do not contradict the gist of the invention.

A Resin parts (caps)
DESCRIPTION OF SYMBOLS 1 Support | pillar 2 Blocking plate 21 Back surface outer peripheral part 22 Fitting leg 23 Rib 3 Film (wrapping film)
31 Surface 32 Standing Wall 4 Mold 41 Film Guide

Claims (10)

  A resin part having a film in-mold molded on the surface thereof, wherein the film is folded and arranged at the outer peripheral edge of the back surface of the resin part, and the tip of the folding margin is enclosed and sandwiched in the molded resin. Resin parts.   The resin part is formed only by the in-mold molding, and the resin resin encapsulating sandwiching at the tip of the folding margin is performed in the molding resin at the time of the in-mold molding. Resin parts for building materials.   The resin component is formed by the in-mold molding and the subsequent two-color molding, and the resin resin encapsulating sandwiching at the tip of the folding margin is between the in-mold molding and the two-color molding resin during the two-color molding. The resin component for building materials according to claim 1, wherein the resin component is for building materials.   The resin component is provided with a plate-like surface portion and a back-side upright portion that is arranged upright with the outer peripheral edge in the surface of the back surface of the plate-like surface portion, and enclosing and sandwiching the front end of the folding margin of the film 4. The resin component for building material according to claim 1, 2 or 3, wherein the molding is performed between the back surface of the plate-like surface portion and the back surface standing portion at the time of molding the portion.   The resin part is fitted with a fitting leg at the longitudinal end portion of the building material processed from the aluminum extruded material, with the plate-shaped surface portion as a closing plate and the back-side standing portion as a fitting leg, and the hollow portion The resin component for building materials according to claim 4, wherein the resin component is a molded cap that is closed with a closing plate and a film having a common pattern with a wrapping film in which the film is applied to the surface of the building material.   The resin component includes a connection surface portion, and an end protrusion portion that protrudes from the both end portions of the connection surface portion so as to leave the outer peripheral end portion. 4. The resin component for building material according to claim 1, 2 or 3, characterized in that it is formed between the rear surface of both end portions of the connecting surface portion and the rear surface protruding portion at the time of forming the portion.   The arrangement of folding the film on the outer periphery of the back surface of the resin part and enclosing and sandwiching the molded resin in the molded resin at the front end of the folding are performed on a part of the outer periphery of the back surface. 6. Resin parts for building materials according to 6.   A method of molding a resin component in which a film is formed in-mold on a surface, wherein a molded film in which an upright wall having an I-shaped or L-shaped cross section facing the rear surface is arranged on the outer periphery is used, In-mold molding is performed with the tip of the standing wall facing the in-plane direction and held by a slide guide, and the standing wall is folded at the outer peripheral edge of the back surface of the resin part and the tip of the folding margin is enclosed in the molding resin. A method for molding a resin component for building materials, characterized by being sandwiched.   A method of molding a resin component in which a film is formed in-mold on a surface, wherein a molded film in which an upright wall having an I-shaped or L-shaped cross section facing the rear surface is arranged on the outer periphery is used, The surface portion in which the standing wall is folded in the outer peripheral end of the back surface of the resin part by molding in-mold with the tip of the standing wall facing the in-plane direction and held by the slide guide, A standing part is formed by two-color molding, and the leading end of the folding margin that is folded and arranged at the outer peripheral edge of the back surface of the surface part is encapsulated and sandwiched between in-mold molding and two-color molding resin during the two-color molding Molding method of resin parts for building materials.   10. The resin part for building materials according to claim 8 or 9, wherein the folding arrangement of the film on the outer periphery of the back surface of the resin part and the enclosing and sandwiching in the molding resin at the front end of the folding are performed in a part of the outer peripheral edge of the back surface. Molding method.

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