Method for manufacturing fiber-resin molded body

Abstract

To provide a production method of a fiber resin molding that can be efficiently molded.SOLUTION: A production method of a fiber resin molding 100 by impregnating a laminate 10 containing fibers with resin comprises: a pre-forming step of pre-forming a heated laminate 10 by pressing the heated laminate with a pre-forming mold 1 consisting of an upper mold 20 and a lower mold 30; and a main molding step in which the pre-formed laminate 10 is placed in a molding space S formed by closing a pair of molds 50, and the resin is injected into the molding space S to impregnate the laminate 10 with the resin. The pre-forming step comprises pressing an end part 10A of the laminate 10 against a convex part 31 provided on the lower mold 30 with a size enlargement body 25 provided on the upper mold 20 so as to bend the end part 10A of the laminate 10 along the convex part 31.SELECTED DRAWING: Figure 4

Description

Technical Field

[0001] The present invention relates to a method for manufacturing a fiber resin molded body.

Background Art

[0002] Conventionally, as a method for manufacturing a fiber resin molded body, the one described in Patent Document 1 is known. Specifically, in Patent Document 1, a heating step of blowing hot air onto a part of a base material and heating it using a heating device such as a dryer, and a forming step of forming the heated part into a shape following the shape of the forming surface by sucking the base material through a plurality of suction holes formed in the forming surface of the mold are provided. A method for manufacturing a fiber resin molded body (resin molded body) is disclosed.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] However, in the manufacturing method disclosed in Patent Document 1, when performing a series of steps including the heating step and the forming step, it takes time and effort. Further, when forming a part of the heated base material into the shape of the forming surface, force may not be evenly applied to the base material, and there is a possibility of crushing the internal structure of the base material. In that case, for example, even when trying to inject and impregnate resin into the formed base material, there is a risk of poor impregnation. On the other hand, when moving the heated base material and placing it on the forming surface of the mold, it is desirable to be able to accurately position it.

[0005] The present invention has been completed based on the above circumstances, and one of its objectives is to provide a method for manufacturing a fiber resin molded body that can be efficiently molded. Another objective is to provide a method for manufacturing a fiber resin molded body that can be molded without collapsing the internal structure. Still another objective is to provide a method for manufacturing a fiber resin molded body that can be molded while accurately positioning.

Means for Solving the Problems

[0006] The present invention is a method for manufacturing a fiber resin molded body obtained by impregnating a sheet material containing fibers with a resin, including a preliminary molding step of pressing the heated sheet material with a preliminary molding die composed of an upper die and a lower die for preliminary molding, and a main molding step of disposing the preliminarily molded sheet material in a molding space formed by closing a pair of molding dies and injecting a resin into the molding space to impregnate the sheet material with the resin. In the preliminary molding step, the end portion of the sheet material is bent along the convex portion by pressing the end portion of the sheet material against the convex portion provided on the lower die with a shaping body provided on the upper die.

[0007] According to such a method for manufacturing a fiber resin molded body, in the preliminary molding step, since the shaping body can press the end portion of the sheet material against the convex portion while elastically deforming in a form in which the shaping body is in close contact with the convex portion, the end portion of the sheet material can be bent at once with an even force before the heated sheet material cools. And since it is difficult for a local force to be applied to the end portion of the sheet material, the end portion of the sheet material can be bent along the convex portion without collapsing the internal structure of the sheet material. As a result, the resin can be suitably impregnated into the sheet material in the main molding step.

[0008] Further, in the preliminary forming step, the film-shaped shaping body can be placed on the end portion of the sheet material and pressed against the convex portion. According to such a method for manufacturing a fiber resin molded body, the film-shaped shaping body can be more closely adhered to the convex portion with the end portion of the sheet material sandwiched therebetween. Thereby, for example, even when the protruding height of the convex portion is relatively high (for example, when the end portion of the sheet material is formed into a U shape with a relatively long length), the end portion of the sheet material can be suitably bent along the convex portion.

[0009] Further, in the preliminary forming step, a tension portion for pulling and stretching the shaping body can be extended to the surface side opposite to the surface of the convex portion facing the upper mold, and the end portion of the sheet material can be pressed against the convex portion. According to such a method for manufacturing a fiber resin molded body, since the film-shaped shaping body can be wrapped around and adhered to the surface side opposite to the surface of the convex portion facing the upper mold, the end of the end portion of the sheet material can be suitably bent.

[0010] Further, in the preliminary forming step, the suction portion provided in a nested manner in the upper mold can be advanced from the molding surface of the upper mold to adsorb the sheet material, and the sheet material can be moved to a position facing the lower mold. According to such a method for manufacturing a fiber resin molded body, the sheet material can be stably adsorbed to the upper mold and smoothly moved to a position facing the lower mold, and the positioning of the sheet material can be accurately performed.

[0011] Further, in the preliminary forming step, the sheet material can be placed on the attached shaping body, the upper mold can be pressed against the sheet material to adsorb it, and the sheet material can be moved to a position facing the lower mold. According to such a method for manufacturing a fiber resin molded body, the sheet material can be suitably adsorbed to the upper mold and smoothly moved to a position facing the lower mold.

Advantages of the Invention

[0012] According to the present invention, it becomes possible to provide a method for manufacturing a fiber resin molded body capable of performing molding efficiently. Further, it becomes possible to provide a method for manufacturing a fiber resin molded body capable of performing molding without collapsing the internal structure. Furthermore, it becomes possible to provide a method for manufacturing a fiber resin molded body capable of performing molding while accurately positioning.

Brief Description of the Drawings

[0013]

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Best Mode for Carrying Out the Invention

[0014] <Embodiment 1> Embodiment 1 of the present invention will be described with reference to FIGS. 1 to 7. In this embodiment, a method for manufacturing a fiber resin molded body that constitutes a vehicle seat provided in a passenger compartment of an automobile (vehicle) will be exemplified. As shown in FIG. 1, the fiber resin molded body has a sandwich structure composed of a core material and sheet-like fiber materials respectively laminated on the front and back surfaces of the core material, and is a laminate (sheet material) 10 that is impregnated with a thermosetting resin and cured in the main molding process described later. The core material is made of a synthetic resin (foamed resin) such as an acrylic resin having a closed-cell structure. As the material of the fiber material, for example, woven fabrics such as carbon fiber and glass fiber, other woven fabrics, or non-woven fabrics such as felt materials can be adopted. Such a core material and fiber material are adhered with an adhesive or the like to constitute the laminate 10. The laminate 10 is softened when heated.

[0015] The method for manufacturing the fiber resin molded body is roughly classified into a preliminary molding process of pressing the heated sheet material 10 with a preliminary molding die 1 for preliminary molding, and a main molding process of arranging the preliminarily molded sheet material 10 in a molding space S formed by closing a pair of molding dies 50 (see FIG. 7), and injecting a thermosetting resin into the molding space S to impregnate the sheet material 10 with the resin. As shown in FIG. 2, the preliminary molding die 1 is composed of an upper die 20 (sometimes called a pressing die) as a movable die and a lower die 30 as a fixed die. The upper die 20 is attached to a moving device (not shown) such as a robot arm, and is configured to be able to displace its position and inclination. As the material of the upper die 20, a resin-made or metal-made one can be adopted, and preferably a resin-made one such as silicone rubber can be adopted. As the material of the lower die 30, a resin-made or metal-made one can be adopted, and preferably a metal-made one such as aluminum can be adopted.

[0016] The upper mold 20 includes a main body portion 21 that constitutes most of the upper mold 20, a suction portion 22 provided in a nested manner in the main body portion 21, a cylinder 23 attached to the side of the main body portion 21, and a block (tension portion) 24 attached to the rod 23A of the cylinder 23. The suction portion 22 is provided on the side of the molding surface (the surface facing the lower mold 30) 21A of the main body portion 21 so as to be able to advance or retreat in the direction of the lower mold 30, and is configured to be able to suck gas from the suction surface 22A serving as the surface facing the lower mold 30. The cylinder 23 is configured to be able to extend or contract by advancing or retreating the rod 23A in the direction of the lower mold 30. Note that as the cylinder 23, an electric cylinder, a hydraulic cylinder, or a pneumatic cylinder can be employed. The block 24 is attached to the tip of the rod 23A of the cylinder 23 and can advance or retreat along with the displacement of the rod 23A. As shown in FIG. 5, the block 24 can rotate in a manner that wraps around the back surface 31B of a convex portion 31 described later by driving a motor or the like at the tip of the rod 23A. As the material of the block 24, a resin such as silicone rubber similar to that of the upper mold 20 or a metal such as aluminum may be employed.

[0017] As shown in FIG. 2, the lower mold 30 includes a plurality of recesses 32 and convex portions 31 protruding upward from the upper portions of the plurality of recesses 32. The convex portion 31 includes a front surface 31A serving as the surface facing the upper mold 20 and a back surface 31B on the back side of the front surface 31A (the surface on the side opposite to the front surface 31A facing the upper mold 20 in the convex portion 31). On the opposing surface 21C of the molding surface 21A of the main body portion 21 of the upper mold 20, which faces the front surface 31A of the convex portion 31, a film-shaped imparting body 25 having elasticity and extensibility is attached. One end of the imparting body 25 is attached to the opposing surface 21C, and the other end is attached to the block 24. As the material of the imparting body 25, a resin such as silicone rubber can be employed. As shown in FIGS. 4 and 5, the imparting body 25 can be pulled by the advancing and rotating block 24 and extended. Note that the imparting body 25 may be, for example, in a thin plate shape, and may have any shape that can be extended along with the advancement and rotation of the block 24.

[0018] As shown in FIG. 1, in the preforming step, first, the laminate 10 is heated by the hot plate 2 to be softened. Then, the upper die 20 is moved above the laminate 10, and the suction part 22 is advanced to bring the suction surface 22A into close contact with the laminate 10. In this state, by sucking gas from the suction surface 22A, the laminate 10 is sucked while being adsorbed to the suction part 22. Next, as shown in FIG. 2, the upper die 20 is moved so that the laminate 10 adsorbed and lifted by the suction part 22 is positioned opposite to the molding surface 30A of the lower die 30. Then, as shown in FIG. 3, the upper die 20 is brought close to the lower die 30, and the suction part 22 is pressed against the molding surface 30A of the lower die 30 together with the laminate 10. At this time, the lower part of the laminate 10 is bent by the lower part of the molding surface 30A of the lower die 30.

[0019] Subsequently, as shown in FIG. 4, while the suction part 22 is retracted to a position where its suction surface 22A is flush with the molding surface 21A of the upper die 20, the upper die 20 is brought closer to the lower die 30, thereby pressing the laminate 10 between the molding surface 21A of the upper die 20 and the molding surface 30A of the lower die 30. As a result, the laminate 10 is molded into a shape following the shapes of the molding surface 21A of the upper die 20 and the molding surface 30A of the lower die 30. For example, the upper part of the laminate 10 is bent in a stepped shape by being pressed into the plurality of recesses 32.

[0020] Here, by pressing the end portion 10A of the laminate 10 against the convex portion 31 with the shaping body 25, the end portion 10A of the laminate 10 is bent along the convex portion 31. Specifically, by extending the cylinder 23 and advancing the block 24, the film-shaped shaping body 25 is pulled and extended in the same direction as the direction in which the upper die 20 approaches the lower die 30 by the block 24. The shaping body 25 is extended to a position beyond the end of the end portion 10A of the laminate 10 and covers the end portion 10A. At this time, hot air may be blown from the side of 31B toward the end portion 10A side of the laminate 10 using a dryer or the like.

[0021] Then, as shown in FIG. 5, the block 24 is rotated at the tip of the rod 23A so as to wrap around the back surface 31B of the convex portion 31, and the extended shaping body 25 is placed on the end portion 10A of the laminate 10 and pressed against the convex portion 31. At this time, the rod 23A may be retracted while the block 24 is rotated, and the back surface 31B side of the convex portion 31 may be pressed by the block 24. The end portion 10A of the laminate 10 is bent so as to follow the shape of the convex portion 31 by being pressed against the convex portion 31 by the shaping body 25 and the block 24. As shown in FIG. 6, after a predetermined time has elapsed, the block 24 is operated so as to reverse the above procedure, and the cylinder 23 is contracted. Then, by separating the upper mold 20 from the lower mold 30, a laminate 10 in which the end portion 10A is formed (preformed) in a U shape is obtained.

[0022] As shown in FIG. 7, in this molding step, a thermosetting resin (hereinafter simply referred to as resin) is impregnated into the laminate 10 using a pair of molds 50 to mold a fiber resin molded body 100. The pair of molds 50 includes an upper mold 51 and a lower mold 52 arranged at a position facing the upper mold 51. When the upper mold 51 is brought close to the lower mold 52 and the mold is closed, the space provided therebetween becomes a molding space S. An injection device 53 for injecting resin into the molding space S is provided on the upper mold 51. As the resin, for example, a two-component mixed epoxy resin composed of a main agent and a curing agent can be employed.

[0023] Two preformed laminates 10 and another laminate 11 are placed in a molding space S formed by closing a pair of molding dies 50. At this time, both ends of the other laminate 11 are arranged so as to overlap the opposite end portions 10B of the two laminates 10, which are opposite to the end portions 10A. Then, by injecting resin from an injection device 53 into the molding space S, the molding space S is filled with resin, and the laminates 10 and 11 are impregnated with resin. After the resin impregnated in the laminates 10 and 11 has hardened, the upper die 51 is separated from the lower die 52 to obtain a fiber resin molded body 100 including the two laminates 10 and the other laminate 11. Incidentally, a pad made of a material such as urethane foam and having elasticity and a cloth cover member covering the fiber resin molded body 100 and the pad are attached to the fiber resin molded body 100. These fiber resin molded body 100, pad, and cover member constitute a vehicle seat. A molded body end portion 100A formed by impregnating the resin into the end portion 10A of the laminate 10 is a portion where the cover member is hooked.

[0024] Subsequently, the effects of the present embodiment will be described. In the present embodiment, there is provided a method for manufacturing a fiber resin molded body 100 obtained by impregnating a laminate 10 containing fibers with resin. The method includes a preforming step of pressing and preforming the heated laminate 10 with a preforming die 1 including an upper die 20 and a lower die 30, and a main forming step of arranging the preformed laminate 10 in a molding space S formed by closing a pair of molding dies 50 and injecting resin into the molding space S to impregnate the laminate 10 with resin. In the preforming step, the end portion 10A of the laminate 10 is bent along the convex portion 31 by pressing the end portion 10A of the laminate 10 against the convex portion 31 provided on the lower die 30 with a shaping body 25 provided on the upper die 20. A method for manufacturing the fiber resin molded body 100 is shown.

[0025] According to such a method for manufacturing the fiber resin molded body 100, in the preliminary molding step, since the shaping body 25 can be elastically deformed while closely adhering to the convex portion 31 and the end portion 10A of the laminate 10 can be pressed against the convex portion 31, before the heated laminate 10 cools, the end portion 10A of the laminate 10 can be bent all at once with an even force. And since it is difficult for a local force to be applied to the end portion 10A of the laminate 10, the end portion 10A of the laminate 10 can be bent along the convex portion 31 without crushing the internal structure of the laminate 10. Thereby, the resin can be suitably impregnated into the laminate 10 in the main molding step.

[0026] Also, in the preliminary molding step, the film-shaped shaping body 25 is placed over the end portion 10A of the laminate 10 and pressed against the convex portion 31. According to such a method for manufacturing the fiber resin molded body 100, the film-shaped shaping body 25 can be more closely adhered to the convex portion 31 with the end portion 10A of the laminate 10 sandwiched therebetween. Thereby, for example, even when the protruding height of the convex portion 31 is relatively high (when the end portion 10A of the laminate 10 is formed into a U shape with a relatively long length), the end portion 10A of the laminate 10 can be suitably bent along the convex portion 31.

[0027] Also, in the preliminary molding step, the block 24 that pulls and stretches the shaping body 25 is rotated to the side of the surface 31B opposite to the surface 31A facing the upper mold 20 at the convex portion 31, and the end portion 10A of the laminate 10 is pressed against the convex portion 31. According to such a method for manufacturing the fiber resin molded body 100, since the film-shaped shaping body 25 can be rotated to and closely adhered to the side of the surface 31B opposite to the surface 31A facing the upper mold 20 at the convex portion 31, the end of the end portion 10A of the laminate 10 can be suitably bent.

[0028] Also, in the preliminary molding step, the suction portion 22 provided in a nested manner in the upper mold 20 is advanced from the molding surface 21A of the upper mold 20 to adsorb the laminate 10, and the laminate 10 is moved to a position facing the lower mold 30. According to such a method for manufacturing the fiber resin molded body 100, the laminate 10 can be stably adsorbed to the upper mold 20 and smoothly moved to a position facing the lower mold 30, and the positioning of the laminate 10 can be accurately performed.

[0029] <Embodiment 2> Next, Embodiment 2 of the present invention will be described with reference to FIGS. 8 to 10. In this embodiment, the same parts as those in the above embodiment are denoted by the same reference numerals, and redundant descriptions of the structure, process, operation, and effect are omitted. As shown in FIG. 8, the lower mold 130 is provided on a fixing base 103 that fixes the lower mold 130. In addition to the lower mold 130, a hot plate 102 is provided on the fixing base 103. The upper mold 112 is movable in the vertical direction with respect to the lower mold 130 (fixing base 103) by electric power, hydraulic pressure, or pneumatic pressure. An extrusion mold 120 is provided on the upper mold 112 so as to be slidable horizontally between the upper side of the hot plate 102 and the upper side of the lower mold 130. The extrusion mold 120 and the lower mold 130 are a pair of preliminary forming molds 101 for pre-forming the laminate 10. The configuration of the extrusion mold 120 is the same as that of the upper mold 20 shown in the above Embodiment 1.

[0030] In the pre-forming process, first, the laminate 10 is heated and softened by the hot plate 102. Then, the extrusion mold 120 is moved above the hot plate 102, and the suction part 22 is advanced to suck the laminate 10. Next, as shown in FIG. 9, the extrusion mold 120 is slid horizontally so that the laminate 10 adsorbed and lifted by the suction part 22 is positioned opposite to the forming surface 30A of the lower mold 130.

[0031] Next, as shown in FIG. 10, by bringing the upper mold 112 closer to the lower mold 130, the extrusion mold 120 moved above the lower mold 130 is brought closer to the lower mold 130, and the laminate 10 is pressed by the forming surface 21A of the extrusion mold 120 and the forming surface 30A of the lower mold 130. As a result, the laminate 10 is formed into a shape that follows the shape of the forming surface 21A of the extrusion mold 120 and the forming surface 30A of the lower mold 130. Then, by pressing the end portion 10A of the laminate 10 against the convex portion 31 with the shaped body 25 stretched by being pulled by the block 24, the end portion 10A of the laminate 10 is bent along the convex portion 31, and a laminate 10 in which the end portion 10A is formed (pre-formed) in a U shape is obtained.

[0032] <Embodiment 3> Next, Embodiment 3 of the present invention will be described with reference to FIGS. 11 and 12. In this embodiment, the same reference numerals are used for the same parts as in the above embodiment, and redundant descriptions of the structure, process, operation, and effect are omitted. On the side of the main body 21 of the upper mold 220 among the pair of preform molds 201, at a position facing the convex portion 31 of the lower mold 30, an elastic shaping body 225 is attached. The shaping body 225 is provided so as to be displaceable by sliding in the vertical direction by electric power, hydraulic pressure, or pneumatic pressure. The shaping body 225 includes a concave portion 225A that is recessed in a shape following the shape of the convex portion 31 of the lower mold 30. When the upper mold 220 approaches the lower mold 30 and the shaping body 225 slides downward, the concave portion 225A fits into the convex portion 31 so as to cover the convex portion 31. Note that as the material of the shaping body 225, a resin material such as silicone rubber can be adopted.

[0033] As shown in FIG. 11, in the preforming process, the laminate 10 adsorbed by the suction portion 22 is moved to a position facing the lower mold 30, and the upper mold 220 is brought close to the lower mold 30, whereby the laminate 10 is pressed by the molding surface of the upper mold 220 and the molding surface of the lower mold 30. Here, by pressing the end portion 10A of the laminate 10 against the convex portion 31 with the shaping body 225, the end portion 10A of the laminate 10 is bent along the convex portion 31. Specifically, as shown in FIG. 12, the shaping body 225 is slid downward toward the lower mold 30 side, and the end portion 10A of the laminate 10 is sandwiched between the concave portion 225A and the convex portion 31 of the lower mold 30 and pressed against the convex portion 31. The end portion 10A of the laminate 10 is bent so as to follow the shape of the convex portion 31 by being pressed against the convex portion 31 by the shaping body 225. After a predetermined time has elapsed, the shaping body 225 is operated so as to reverse the above procedure. Then, by separating the upper mold 220 from the lower mold 30, a laminate 10 in which the end portion 10A is formed (preformed) in a U shape is obtained.

[0034] <Embodiment 4> Next, Embodiment 4 of the present invention will be described with reference to FIGS. 13 and 14. In this embodiment, the same parts as those in the above embodiment are denoted by the same reference numerals, and redundant descriptions of the structure, process, action, and effect are omitted. The upper mold 320 of the pair of preform molds includes a plurality of suction portions 322 capable of sucking gas. The suction portions 322 are provided on the side of the upper mold 320 and are not provided on the molding surface 320A of the upper mold 320. On the other hand, the hot plate 302 for heating the laminate 10 is provided above a spring 304 fixed to the fixed base 303, and its position is configured to be displaceable in the vertical direction. A sticking shaping body 305, which is a film-shaped shaping body made of silicon rubber or the like, is stuck on the upper side of the hot plate 302.

[0035] In the preforming process, first, the laminate 10 is placed on the sticking shaping body 305, and the laminate 10 is heated from below the sticking shaping body 305 by the hot plate 302 to be softened. At this time, the hot plate 302 may slightly push up the sticking shaping body 305 upward. Subsequently, the upper mold 320 is moved above the sticking shaping body 305 and pressed against the sticking shaping body 305 as shown in FIG. 15. At this time, the spring 304 that fixes the hot plate 302 contracts, and the upper mold 320 is pressed toward the sticking shaping body 305 until the laminate 10 is pressed against the molding surface 320A of the upper mold 320 by the tension of the sticking shaping body 305. Then, the outer peripheral side of the laminate 10 is sucked by the plurality of suction portions 322, and the laminate 10 is lifted. In this state, the upper mold 320 is moved so that the laminate 10 is positioned to face the lower mold (for example, the lower mold 30) shown in the above embodiment.

[0036] According to such a method for manufacturing a fiber resin molded body, the laminate 10 can be suitably sucked by the upper mold 320 and smoothly moved to a position facing the lower mold. Further, since the suction portions 322 are provided on the side of the upper mold 320, the inner side of the sucked laminate 10 is not sucked (gas suction does not occur on the inner side), and it is easy to keep the laminate 10 in a softened state after being heated, which is preferable.

[0037] <Other Embodiments> The present invention is not limited to the embodiments described above and in the drawings. For example, the following embodiments are also included in the technical scope of the present invention, and various modifications can be made and implemented without departing from the gist of the invention other than those described below.

[0038] (1) In the above embodiment, the block is configured to be rotatable at the tip of the rod by driving a motor or the like, but it is not limited to this. For example, at the tip of the cylinder (referred to as the first cylinder) in the above embodiment, a second cylinder different from the first cylinder may be provided, and the block may be configured to move to the back side of the convex portion without rotating by the two-stage extension of the first cylinder and the second cylinder.

[0039] (2) In the above embodiment, the laminate is placed on a hot plate and heated, but it is not limited to this. For example, the laminate may be heated by roasting it with an IR heater or the like. In that case, after the laminate is adsorbed to the adsorption portion of the upper mold, it may be roasted with an IR heater for heating and then moved above the lower mold.

[0040] (3) In the above embodiment, the upper mold is assumed to be attached to a moving device (not shown) such as a robot arm, but it is not limited to this. For example, the upper mold may be attached to the tip of a swing portion that can swing pendulum-like between above the hot plate and above the lower mold. In that case, the upper mold may be moved by manually swinging the swing portion.

[0041] (4) In the above embodiment, the fiber resin molded body is configured to form a vehicle seat, but it is not limited to this. For example, the fiber resin molded body may be configured to form other vehicle interior materials such as the upper board of the door trim and the instrument panel. Further, the fiber resin molded body is not limited to those provided for automobiles, and may be provided in various vehicles. For example, the fiber resin molded body may be provided in vehicles such as trains and amusement vehicles as ground vehicles, airplanes and helicopters as flight vehicles, and ships and submarines as marine and underwater vehicles.

Description of Reference Numerals

[0042] 1,101,201... preform mold, 10... laminate (sheet material), 20, 120, 220, 320... upper mold (press mold), 22, 322... suction part, 24... block (tension part), 25, 225... shaped body, 30, 130... lower mold, 31... convex part, 50... forming mold, 100... fiber resin formed body, S... forming space

Claims

1. A method for producing a fiber resin molding by impregnating a sheet material containing fibers with a resin, comprising the steps of: a preforming step of pressing the heated sheet material with a preforming die having an upper die and a lower die to preform the sheet material; a main molding step of arranging the preformed sheet material in a molding space formed by closing a pair of molds and impregnating the sheet material with resin by injecting resin into the molding space, In the preforming step, a shaped body provided in the upper mold presses an end of the sheet material against a convex portion provided in the lower mold, thereby bending the end of the sheet material along the convex portion, The upper mold includes a main body, a cylinder attached to a side of the main body, and a block attached to a rod of the cylinder, The cylinder is configured to be able to extend or contract by advancing or retreating the rod toward the lower mold side, the block is attached to a tip of the rod of the cylinder, and can move forward or backward in accordance with the displacement of the rod, and can rotate around the rear side surface of the protrusion at the tip of the rod, The shaped body has one end attached to the main body portion and the other end attached to the block, A method for manufacturing a fiber resin molding, characterized in that as the block moves forward, the shaping body presses the end of the sheet material, thereby bending the end of the sheet material starting from the convex portion, and as the block rotates in the advanced state, the shaping body causes the end of the sheet material to wrap around to the side of the convex portion opposite the side facing the upper mold, and presses the end of the sheet material against the convex portion.

2. A method for manufacturing a fiber resin molding as described in claim 1, characterized in that after the block is rotated in the advanced state, the rod is retracted, thereby pressing the end of the sheet material against the opposite surface of the convex portion.

3. The method for manufacturing a fiber resin molding described in claim 1 or claim 2, characterized in that in the pre-molding process, an suction portion nested in the upper mold is advanced from the molding surface of the upper mold to adsorb to the sheet material, and the sheet material is moved to a position opposite the lower mold.

4. The method for manufacturing a fiber resin molding described in any one of claims 1 to 3, characterized in that in the pre-forming process, the sheet material is placed on an applied shaped body, the upper mold is pressed against the sheet material to adsorb it, and the sheet material is moved to a position opposite the lower mold.

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