Film insert molded article and method for manufacturing film insert molded article
The method of using two resin materials with support and recessed edges in film insert molding addresses deformation issues, achieving seamless coverage and adjustable light transmission for enhanced product design.
Patent Information
- Application Number
- JP2024109683
- Authority / Receiving Office
- JP · JP
- Patent Type
- Applications
- Current Assignee / Owner
- Filing Date
- 2024-07-08
- Publication Date
- 2026-01-21
AI Technical Summary
Existing film insert molding processes face challenges in covering the end face and both sides in the thickness direction of an insert film with resin, as the resin flow deforms the outer edge of the insert film, making it difficult to form a seamless integration.
A method involving two resin materials, where a first resin material supports the insert film's outer edge during resin injection, and a second resin material wraps around to cover the edge and thickness-wise surfaces, with the first resin material having a recessed outer edge and a space for film stretching, and a deburring portion to prevent resin flow into gaps.
This approach prevents resin deformation of the insert film edge, ensures seamless coverage, allows for firm attachment of resin materials, and enables adjustable light transmission for improved design through varying resin transmittances, enhancing the appearance of the molded product.
Smart Images

Figure 2026009653000001_ABST
Abstract
Description
[Technical Field]
[0001] The present disclosure relates to a film insert molded article and a method for manufacturing a film insert molded article. [Background technology]
[0002] Patent Document 1 describes a film insert molded product in which an insert film is bonded to a resin material and the two are integrated so that the surface of the insert film is exposed from the resin material. In this film insert molded product, the resin material and the insert film are integrated so that the end faces at the outer edge of the insert film and both surfaces in the thickness direction are covered with the resin material. For such an insert molded product, it is conceivable to place the insert film in a cavity between a fixed mold and a movable mold, and then inject molten resin into the cavity with the molds clamped. [Prior art documents] [Patent documents]
[0003] [Patent Document 1] Japanese Patent Application Publication No. 2018-94813 Summary of the Invention [Problem to be solved by the invention]
[0004] When forming the above-mentioned film insert molding, in order to cover the end face and both sides in the thickness direction of the outer edge of the insert film placed in the cavity with molten resin, the resin needs to flow in the cavity as follows: That is, the resin needs to flow from the back side of the outer edge of the insert film, passing next to the end face of the outer edge, to the front side of the end face. To achieve the above-mentioned resin flow, for example, it is possible to inject molten resin into the cavity while the outer edge of the insert film is floating above the fixed mold and movable mold within the cavity.
[0005] However, in this case, when the resin passes from the back side of the outer edge of the insert film to the side of the end face of the outer edge, it presses the outer edge of the insert film from the back side to the front side, which deforms the outer edge of the insert film and makes it difficult for the resin to wrap around to the front side.As a result, it becomes difficult to form a film insert molding in which the end face and both sides in the thickness direction of the outer edge of the insert film are covered with resin material. [Means for solving the problem]
[0006] Next, various aspects of a film insert molded article and a method for manufacturing a film insert molded article that solves the above problems will be described. (Aspect 1) In a film insert molding product in which a resin material and an insert film are integrated together so that the insert film is bonded to the resin material and the surface of the insert film is exposed from the resin material, and the end faces and both thickness-wise surfaces of the outer edge of the insert film are covered by the resin material, the resin materials being a first resin material and a second resin material, the first resin material being arranged to cover the back surface of one of the thickness-wise surfaces of the insert film, and the second resin material being arranged to cover the surface of the first resin material opposite the surface facing the insert film, and to wrap around the outer edges of the first resin material and the insert film from the opposite surface to reach the surface of one of the thickness-wise surfaces of the insert film.
[0007] According to the above configuration, for example, a film insert molded product can be formed as follows. That is, a core is provided in a cavity between a fixed mold and a movable mold, contacting one of the surfaces of the outer edge of an insert film in the thickness direction. Then, when a first fixed mold and a movable mold for forming a first resin material are clamped together, molten resin is injected into the cavity to form the first resin material so as to cover one of the back surfaces of the insert film in the thickness direction. As a result, the outer edge of the insert film in the cavity is supported by the first resin material. Then, when a second fixed mold and a movable mold for forming a second resin material are clamped together, the core is moved in a direction away from the outer edge of the insert film while contacting the surface of the insert film. In this state, when molten resin is injected into the cavity between the second fixed mold and the movable mold, the resin flows from the back side of the outer edge of the insert film—specifically, from the surface of the first resin material opposite the insert film side, past the end face of the outer edge, and around to the front side of the outer edge. At this time, the outer edge of the insert film is pressed from the back side to the front side by the resin, but because it is supported by the first resin material, it is not deformed by the pressure of the resin. Therefore, it is possible to prevent the resin from being unable to wrap around from the back side of the outer edge of the insert film to the front side, passing next to the edge face due to deformation. As a result, the following second resin material is formed in the film insert molded product. That is, the second resin material covers the surface of the first resin material opposite the surface facing the insert film, and from that opposite surface, wraps around the outer edge of the first resin material and the insert film to reach both surfaces of the outer edge of the insert film in the thickness direction. Therefore, it is possible to form a film insert molded product in which the edge face and both surfaces in the thickness direction of the outer edge of the insert film are covered by resin materials such as the first resin material and the second resin material.
[0008] (Aspect 2) The outer edge of the first resin material, which is positioned corresponding to the outer edge of the insert film, is formed so that the end face of the outer edge is recessed relative to the end face of the outer edge of the insert film (film insert molding product described in embodiment 1).
[0009] When a film insert molded product is formed as described above, it is possible to provide a space between the first fixed mold and the movable mold when the first fixed mold and the movable mold are clamped together. This is to allow the space to accommodate the stretching of the insert film when molten resin is injected into the cavity between the first fixed mold and the movable mold to form the first resin material. If such a space is provided, there is a risk that the resin will flow into the space. However, with the above configuration, the outer edge of the first resin material is recessed relative to the outer edge of the insert film, so that the portion of the first fixed mold facing the back surface of the insert film has a fixed length in the direction away from the space. As a result, the resin is less likely to flow between the outer edge of the insert film and the back surface of the insert film, thereby preventing the resin from flowing into the space.
[0010] (Aspect 3) The film insert molded product according to (Aspect 1) or (Aspect 2), wherein the first resin material is formed so that its outer edge is thinner than other portions.
[0011] According to the above configuration, when the second resin material sandwiches the outer edge of the first resin material and the outer edge of the insert film, the thickness of the sandwiched outer edge of the first resin material and the outer edge of the insert film can be reduced, thereby allowing the second resin material to be firmly attached to the first resin material and the insert film.
[0012] (Aspect 4) The film insert molded product according to any one of (Aspect 1) to (Aspect 3), wherein the first resin material and the second resin material have different light transmittances.
[0013] It is conceivable that the design of a film insert molded product can be improved by disposing a light source on the back side of the film insert molded product and transmitting light from the light source to the front side of the film insert molded product. According to the above configuration, by making the light transmittance of the first resin material and the second resin material different, it is possible to individually adjust the transmission of light from the light source through the first resin material and the second resin material. Then, by individually adjusting the transmission of light from the light source through the first resin material and the second resin material so that the appearance of the film insert molded product when the light source is illuminated is improved, the design of the film insert molded product can be improved.
[0014] (Aspect 5) In a method for manufacturing a film insert molded product, an insert film is placed in a cavity between a fixed mold and a movable mold, and molten resin is injected into the cavity while the molds are clamped, thereby forming a film insert molded product in which the insert film is bonded to the resin material and the resin material is integrated with the insert film so that the surface of the insert film is exposed from the resin material. The resin materials are a first resin material and a second resin material, the fixed molds are a first fixed mold and a second fixed mold, and the movable mold is provided with a core that contacts both surfaces in the thickness direction at the outer edge of the insert film placed in the cavity, and the molten resin is injected into the cavity when the movable mold and the first fixed mold are clamped. a first step of forming the first resin material so as to cover the back surface of one of the two surfaces in the thickness direction of the insert film, and a second step of forming the second resin material so as to cover the back surface of one of the two surfaces in the thickness direction of the insert film when the movable mold and the second fixed mold are clamped together after the first step, by moving the core in a direction away from the outer edge of the insert film while contacting the surface of the insert film, and injecting molten resin into the cavity in this state, thereby forming the second resin material that covers the surface of the first resin material opposite to the surface of the insert film side, and that is arranged from the opposite surface around the outer edges of the first resin material and the insert film and reaches the surface of one of the two surfaces in the thickness direction of the outer edge of the insert film.
[0015] According to the above method, when the second resin material is formed in the second step, the outer edge of the insert film is supported by the first resin material. When molten resin is injected into the cavity between the second fixed mold and the movable mold in the second step, the resin flows from the back side of the outer edge of the insert film—specifically, from the surface of the first resin material opposite the insert film side, around the edge of the outer edge, and around to the front side of the outer edge. Although the outer edge of the insert film is pressed from the back side to the front side by the resin, it is supported by the first resin material and is not deformed by the resin pressure. This prevents the resin from being unable to flow from the back side of the outer edge of the insert film around the edge of the insert film to the front side due to deformation. As a result, the following second resin material is formed in the film insert molding product. That is, the second resin material is formed to cover the surface opposite the surface facing the insert film, and to wrap around the outer edges of the first resin material and the insert film from the opposite surface, reaching both surfaces of the outer edge of the insert film in the thickness direction. Therefore, it is possible to form a film insert molding in which the end faces at the outer edge and both surfaces in the thickness direction of the insert film are covered with the resin materials, such as the first resin material and the second resin material.
[0016] (Aspect 6) The method for producing a film insert molding product according to (Aspect 5), wherein the first fixed mold forms a space between the first fixed mold and the end face of the outer edge of the insert film during the first step.
[0017] According to the above method, even if the insert film is stretched by the molten resin injected into the cavity between the first fixed mold and the movable mold in the first step, the above-mentioned space allows the insert film to stretch. If the above-mentioned space does not exist, the outer edge of the insert film may bend when stretched as described above. This bending of the outer edge of the insert film can be suppressed.
[0018] (Aspect 7) A method for manufacturing a film insert molding product described in (Aspect 6), wherein the first fixed mold has a burr cutting portion that faces the back surface of the outer edge of the insert film during the first step, and the burr cutting portion has a predetermined length in a direction away from the space, thereby preventing the resin injected into the cavity from flowing into the space.
[0019] When molten resin is injected into the cavity between the first fixed mold and the movable mold in the first step, there is a risk that the resin will flow into the space. According to the above method, during the first step, the deburring portion of the first fixed mold faces the back surface of the outer edge of the insert film. This deburring portion has a set length in a direction away from the space, preventing the resin injected into the cavity from flowing into the space. Therefore, the resin that has flowed into the space can be prevented from interfering with the formation of the second resin material in the second step. [Brief explanation of the drawings]
[0020] [Figure 1] FIG. 2 is a front view showing an emblem attached to the exterior surface of a vehicle. [Figure 2] 2 is a cross-sectional view showing the emblem of FIG. 1 as viewed in the direction of arrows II-II. [Figure 3] 3 is an enlarged cross-sectional view showing a portion of the emblem in FIG. 2 surrounded by a dashed line. FIG. [Figure 4] 3 is a cross-sectional view showing the integrated insert film and first resin material in the emblem of FIG. 2, and the movable mold and first fixed mold used to form the integrated insert film and first resin material. FIG. [Figure 5] 3 is a cross-sectional view showing the integrated insert film, first resin material, and second resin material in the emblem of FIG. 2, as well as the movable mold and second fixed mold used to form the integrated insert film, first resin material, and second resin material. [Figure 6] 5 is an enlarged cross-sectional view showing the insert film, the first resin material, the movable mold, and the first fixed mold in FIG. 4, the areas surrounded by dashed lines. FIG. [Figure 7]6 is an enlarged cross-sectional view showing the insert film, the first resin material, the second resin material, the movable mold, and the fixed mold in FIG. 5, each surrounded by a broken line. DETAILED DESCRIPTION OF THE INVENTION
[0021] Hereinafter, one embodiment of a film insert molded product and a method for producing the same will be described with reference to FIGS. <Configuration of film insert molding product> An example of a film insert molded product is a vehicle emblem 11 shown in Fig. 1. This emblem 11 can be attached to the outer surface of a vehicle 12. As shown in Fig. 2, the emblem 11 includes a base 13 that is attached to the outer surface of the vehicle 12, a resin material 14 that is attached to the base 13, and an insert film 15 that is integrated with the resin material 14.
[0022] When attached to the outer surface of the vehicle 12, the base 13 protrudes from the outer surface. The resin material 14 is attached to the tip of the base 13 in the protruding direction relative to the outer surface of the vehicle 12. When attached to the base 13, the resin material 14 protrudes from the tip of the base 13 in a direction away from the outer surface of the vehicle 12. The insert film 15 is bonded to the resin material 14. A surface 15a of the insert film 15 is exposed from the resin material 14. The resin material 14 is composed of a first resin material 16 and a second resin material 17.
[0023] The first resin material 16 is disposed so as to cover the back surface 15b, which is located opposite the front surface 15a, of both surfaces in the thickness direction of the insert film 15. The second resin material 17 covers the surface of the first resin material 16 opposite to the surface on the insert film 15 side. More specifically, the second resin material 17 does not cover the portion of the surface of the first resin material 16 opposite to the surface on the insert film 15 side that corresponds to the center of the insert film 15, but covers only the portion corresponding to the central periphery of the insert film 15.
[0024] In the emblem 11, it is possible to enhance the design of the emblem 11 by placing a light source such as an LED on the back side of the center of the first resin material 16 and allowing the light from the light source to pass through to the front side of the emblem 11.
[0025] In this case, it is preferable that the first resin material 16 and the second resin material 17 have different light transmittances. By making the first resin material 16 and the second resin material 17 different in light transmittance, it becomes possible to individually adjust the light transmittance in the first resin material 16 and the second resin material 17. Then, by individually adjusting the light transmittance from the light source in the first resin material 16 and the second resin material 17 so that the emblem 11 looks good when the light source is illuminated, it is possible to improve the design of the emblem 11. In order to improve the design of the emblem 11, for example, it is possible to make the first resin material 16 light-transmitting while making the second resin material 17 light-blocking.
[0026] <Structure of the Outer Edge of the Insert Film 15 in the Emblem 11> FIG. 3 shows an enlarged view of the periphery of the insert film 15 in the emblem 11 of FIG. 2. As can be seen from FIG. 3, the first resin material 16 is formed so that its outer edge is thinner than other portions. The outer edge of the first resin material 16 is located corresponding to the outer edge of the insert film 15. The outer edge of the first resin material 16 is also formed so that its end face 21 is recessed, for example, by about 2 mm from the end face 22 of the outer edge of the insert film 15. Meanwhile, the second resin material 17 has an extension portion 18. The extension portion 18 is arranged so that it extends from the surface of the first resin material 16 opposite the surface facing the insert film 15, around the outer edges of the first resin material 16 and the insert film 15, and reaches the surface 15a of the insert film 15.
[0027] <Manufacturing method for film insert molding> Next, a method for manufacturing the emblem 11, more specifically, a method for manufacturing the integrated resin material 14 and insert film 15, will be described.
[0028] As shown in Figures 4 and 5, the integrated resin material 14 and insert film 15 of the emblem 11 are formed using a movable mold 23 and a fixed mold 25. The fixed mold 25 is made up of a first fixed mold 26 shown in Figure 4 and a second fixed mold 27 shown in Figure 5. When forming the integrated resin material 14 and insert film 15 of the emblem 11, the movable mold 23 and the first fixed mold 26 are clamped and opened, and then the movable mold 23 and the second fixed mold 27 are clamped and opened.
[0029] Specifically, the insert film 15 is placed in a position of the movable die 23 that corresponds to the cavity 24 between the opened movable die 23 and the first fixed die 26 shown in FIG. 4. The movable die 23 is provided with a core 28 that contacts the surface 15a, one of the two surfaces in the thickness direction at the outer edge of the insert film 15 placed in the cavity 24. As shown in FIG. 6, the core 28 is in contact with the surface 15a of the insert film 15 and is movable in directions toward and away from the end surface 22 of the outer edge of the insert film 15. Specifically, a contact surface 28b extending parallel to the movement direction of the core 28 is formed on the surface of the core 28 that faces the insert film 15 and is located on the side of the end surface 22. The contact surface 28b is in contact with the insert film 15. The contact of the contact surface 28b with the insert film 15 is maintained even during the movement of the core 28.
[0030] <1st process> After the insert film 15 is placed in the cavity 24 as described above, a first step is performed to form the first resin material 16 using the movable mold 23 and the first fixed mold 26. In this first step, with the movable mold 23 and the first fixed mold 26 clamped together, molten resin is injected into the cavity 24, thereby forming the first resin material 16 so as to cover the back surface 15b of both surfaces in the thickness direction of the insert film 15. By forming the first resin material 16 in this manner, the insert film 15 and the first resin material 16 are integrated.
[0031] 6, during the first step, the end face 28a of the core 28 of the movable mold 23, i.e., the end face at the bottom in FIG. 6, is positioned corresponding to the end face 22 of the insert film 15. More specifically, the end face 28a of the core 28 is positioned so as to be recessed from the end face 22 of the insert film 15 by, for example, about 1 mm.
[0032] During the first step, the first fixed mold 26 forms a space S between itself and the end face 22 of the outer edge of the insert film 15. This space S is intended to allow the insert film 15 to stretch even if the insert film 15 is stretched by molten resin when the molten resin is injected into the cavity 24 between the first fixed mold 26 and the movable mold 23 during the first step.
[0033] The first fixed mold 26 also has a deburring portion 29 that faces the back surface 15b of the outer edge of the insert film 15 during the first step. The deburring portion 29 has a set length in a direction away from the space S, thereby preventing the resin injected into the cavity 24 from flowing into the space S. The distance between the deburring portion 29 and the back surface 15b is set to a value that can prevent the resin from flowing into the space S, for example, approximately 0.02 to 0.04 mm.
[0034] <Second process> After the first step is performed and the movable die 23 and the first fixed die 26 are opened, a second step is performed to form the second resin material 17 using the movable die 23 and the second fixed die 27. In this second step, when the movable die 23 and the second fixed die 27 are clamped together as shown in Fig. 6, the core 28 is moved in a direction away from the end face 22 of the outer edge of the insert film 15 while the contact surface 28b of the core 28 is brought into contact with the surface 15a of the insert film 15 as shown in Fig. 7. The amount of movement of the core 28 can be, for example, about 2 mm.
[0035] Furthermore, after the movable mold 23 and the second fixed mold 27 are clamped together, molten resin is injected into the cavity 24 between them to form a second resin material 17 having an extension 18. The second resin material 17 formed in this manner covers the surface of the first resin material 16 opposite to the surface facing the insert film 15. The extension 18 of the second resin material 17 extends from the surface of the first resin material 16 opposite to the insert film 15, around the outer edges of the first resin material 16 and the insert film 15, and reaches the surface 15a of one of both surfaces in the thickness direction at the outer edge of the insert film 15. By forming the second resin material 17 in this manner, the insert film 15, the first resin material 16, and the second resin material 17 are integrated.
[0036] <Effects of film insert molding and its manufacturing method> According to the present embodiment described above in detail, the following advantageous effects can be obtained. (1) The resin material 14 of the emblem 11 is made up of a first resin material 16 and a second resin material 17. The insert film 15, the first resin material 16, and the second resin material 17 are integrated together. The second resin material 17 has an extension 18 that extends from the surface of the first resin material 16 facing the insert film 15, around the outer edges of the first resin material 16 and the insert film 15, and reaches the surface 15a of the insert film 15.
[0037] When the second resin material 17 is formed in the second step, the outer edge of the insert film 15 is supported by the first resin material 16. When molten resin is injected into the cavity 24 between the second fixed mold 27 and the movable mold 23 in the second step, the resin flows from the back surface 15b of the outer edge of the insert film 15, specifically, from the surface of the first resin material 16 opposite the insert film 15 side, passing by the edge surface 22 of the outer edge, and wrapping around to the front surface 15a of the outer edge. At this time, the outer edge of the insert film 15 is pressed from the back surface 15b to the front surface 15a by the resin, but is not deformed by the resin pressure because it is supported by the first resin material 16. Therefore, it is possible to prevent the resin from being unable to flow from the back surface 15b of the outer edge of the insert film 15 to the front surface 15a by passing by the edge surface 22.
[0038] As a result, the following second resin material 17 is formed, which is integrated with the insert film 15 and the first resin material 16, i.e., the second resin material 17 having the above-mentioned extension portion 18. Therefore, it is possible to form the emblem 11 in which the end face 22 at the outer edge of the insert film 15 and both surfaces in the thickness direction are covered with the resin material 14, i.e., the first resin material 16 and the second resin material 17.
[0039] (2) The first resin material 16 is formed so that its outer edge is thinner than other portions. Therefore, when the second resin material 17 sandwiches the outer edge of the first resin material 16 and the outer edge of the insert film 15 with the extension portion 18, the thickness of the sandwiched outer edge of the first resin material 16 and the outer edge of the insert film 15 can be made thinner. Therefore, the second resin material 17 can be firmly attached to the first resin material 16 and the insert film 15.
[0040] (3) The first resin material 16 and the second resin material 17 have different light transmittances. By making the first resin material 16 and the second resin material 17 different in light transmittance, it becomes possible to individually adjust the light transmittance in the first resin material 16 and the second resin material 17. Furthermore, by individually adjusting the light transmittance from the light source in the first resin material 16 and the second resin material 17 so that the appearance of the emblem 11 improves when the light source is illuminated, the design of the emblem 11 can be improved.
[0041] (4) In the first step, the first fixed mold 26 forms a space S between itself and the end face 22 of the outer edge of the insert film 15. Therefore, even if the insert film 15 is stretched by the resin when molten resin is injected into the cavity 24 between the first fixed mold 26 and the movable mold 23 in the first step, the space S allows the stretching of the insert film 15. If such a space S did not exist, the outer edge of the insert film 15 would bend when the insert film 15 is stretched as described above. This bending of the outer edge of the insert film 15 can be suppressed.
[0042] (5) The outer edge of the first resin material 16 is formed so that its end face 21 is recessed relative to the end face 22 of the outer edge of the insert film 15. Furthermore, the first fixed mold 26 has a burr-removing portion 29 that faces the back surface 15b of the outer edge of the insert film 15 during the first step. This burr-removing portion 29 has a set length in the direction away from the space S, thereby preventing the resin injected into the cavity 24 from flowing into the space S. Therefore, the resin that has flowed into the space S can be prevented from interfering with the formation of the second resin material 17 in the second step.
[0043] The above embodiment can be modified as follows, for example: The above embodiment and the following modifications can be combined and implemented within the scope of technical compatibility. The first fixed mold 26 does not necessarily have to form the space S during the first step. If the space S is not formed, the deburring portion 29 of the first fixed mold 26 may be omitted. That is, by aligning the positions of the end face 22 of the outer edge of the insert film 15 and the end face 21 of the outer edge of the first resin material 16, the shape of the first fixed mold 26 is made to have no deburring portion 29.
[0044] When the light transmittance of the first resin material 16 and the second resin material 17 is made different in order to improve the design of the emblem 11, for example, the first resin material 16 may be made to block light, while the second resin material 17 may be made to transmit light.
[0045] Although the emblem 11 has been given as an example of a film insert molded product, the present invention may be applied to film insert molded products such as exterior parts for vehicles other than the emblem 11, or film insert molded products for purposes other than vehicles. [Explanation of symbols]
[0046] 11...Emblem 12...Vehicle 13...Foundation 14...Resin material 15...Insert film 15a…Surface 15b…Back side 16...First resin material 17...Second resin material 18...Extending part 21...End face 22...End face 23…Movable type 24...cavity 25…Fixed type 26...1st fixed type 27…Second fixed type 28...Core 28a...end face 29...Deburring section
Claims
1. A film insert molding product in which the resin material and the insert film are integrated together so that the insert film is bonded to the resin material, the surface of the insert film is exposed from the resin material, and the end faces and both surfaces in the thickness direction at the outer edge of the insert film are covered with the resin material, the resin materials are a first resin material and a second resin material, The first resin material is disposed so as to cover a rear surface of the insert film in a thickness direction, The second resin material covers the surface of the first resin material opposite to the surface facing the insert film, and is arranged from the opposite surface around the outer edges of the first resin material and the insert film to reach the surface of both sides of the insert film in the thickness direction.
2. A film insert molding product as described in claim 1, wherein the outer edge of the first resin material, which is positioned corresponding to the outer edge of the insert film, is formed so that the end face of the outer edge is recessed relative to the end face of the outer edge of the insert film.
3. 3. The film insert molding product according to claim 1, wherein the first resin material is formed so that its outer edge is thinner than other portions.
4. The film insert molding product according to claim 1 or 2, wherein the first resin material and the second resin material have different light transmittances.
5. A method for manufacturing a film insert molded product, in which an insert film is placed in a cavity between a fixed mold and a movable mold, and molten resin is injected into the cavity while the molds are closed, thereby forming a film insert molded product in which the insert film is bonded to the resin material and the resin material is integrated with the insert film so that the surface of the insert film is exposed from the resin material, the resin materials are a first resin material and a second resin material, the fixed type includes a first fixed type and a second fixed type, the movable mold is provided with a core that contacts one of both surfaces in the thickness direction of the outer edge of the insert film arranged in the cavity, a first step of forming the first resin material so as to cover the back surface of the insert film in the thickness direction by injecting molten resin into the cavity when the movable mold and the first fixed mold are clamped together; A method for manufacturing a film insert molded product in which, after the first step, when the movable mold and the second fixed mold are clamped together, the core is brought into contact with the surface of the insert film and moved in a direction away from the outer edge of the insert film, and in that state, molten resin is injected into the cavity to form the second resin material, which covers the surface of the first resin material opposite to the surface facing the insert film, and which is arranged from the opposite surface around the first resin material and the outer edge of the insert film and wraps around the surfaces of both sides of the outer edge of the insert film in the thickness direction.
6. The method for producing a film insert molding product according to claim 5, wherein the first fixed mold forms a space between the first fixed mold and an end face of the outer edge of the insert film during the first step.
7. the first fixed die has a burr-removing portion that faces the back surface of the outer edge of the insert film during the first step; The method for manufacturing a film insert molding product according to claim 6, wherein the deburring portion has a predetermined length in a direction away from the space, thereby preventing the resin injected into the cavity from flowing into the space.
Citation Information
Patent Citations
Film insert molded product
JP2018094813A