JP5521175B2 - Press molding apparatus and press molding method - Google Patents

Description

  The present invention relates to a press molding apparatus and a press molding method, and more particularly to a press molding apparatus and a press molding method for press molding a fiber reinforced resin.

  As a method for molding a fiber reinforced resin such as carbon fiber reinforced resin (CFRP), a prepreg obtained by semi-curing a sheet in which a carbon fiber is impregnated with a thermosetting resin such as an epoxy resin is prepared and has a desired shape. There are methods of pressing against a mold or compressing with a mold and then solidifying by heating and holding. There is also a method in which a carbon fiber base material containing only carbon fiber or a small amount of resin is prepared in the shape of a molded product, placed in a mold, and a thermosetting resin is injected into the mold at high pressure to solidify it. Has been developed.

  As a method of efficiently molding the fiber reinforced resin, when the fiber reinforced resin is molded with a mold, a sheet constituting the surface resin is preliminarily shaped along the surface of the mold to form the fiber. A method of simultaneously forming a surface film of a reinforced resin has been proposed (see, for example, Patent Document 1). In addition, there has been proposed a molding method in which the pressure applied to the resin is increased by attaching a silicon rubber for preventing protrusion to the mold mating surface (see, for example, Patent Document 2).

JP-A-2-273223 JP-A-61-114820

  However, the conventional method for molding a fiber reinforced resin has a problem that it takes time to mold the fiber reinforced resin when the fiber reinforced resin is molded into a three-dimensional shape.

  That is, in the conventional fiber reinforced resin molding method in which a prepreg is prepared and heat-cured, a long curing time of about 1 hour is usually required to heat-cur the prepreg. Further, in the method of forming a fiber reinforced resin in which a thermosetting resin is injected into a mold and solidified, a curing time of about 10 minutes is required even if a thermosetting resin that solidifies in a short time is used. Further, the molding methods described in Patent Document 1 and Patent Document 2 do not shorten the curing time.

  On the other hand, there is a method of forming a fiber reinforced resin using a thermoplastic resin having a shorter curing time than a thermosetting resin. In this method for molding a carbon fiber reinforced resin using a thermoplastic resin, a plane in which the oriented carbon fibers are sandwiched between thermoplastic resin films and pressed and compressed at a predetermined temperature to impregnate the thermoplastic resin. Create a sheet. However, with this method, only a flat plate can be formed.

  In addition, as a method for molding a carbon fiber reinforced resin using a thermoplastic resin, a carbon fiber fabric mixed with only carbon fiber or a small amount of resin is prepared in the shape of a molded product and placed in a mold. A method in which a thermoplastic resin melted at a high pressure is injected and solidified is also conceivable. However, in this molding method, since the viscosity of the resin is large, it is not easy to sufficiently impregnate the resin between the carbon fibers, and it takes time to impregnate the resin.

  For this reason, in the method of molding a fiber reinforced resin using a thermoplastic resin, it takes time to mold the fiber reinforced resin when the fiber reinforced resin is molded into a three-dimensional shape.

  Accordingly, the present invention has been made in view of such problems, and in the case of forming a fiber reinforced resin into a three-dimensional shape, a press forming apparatus and a press forming capable of shortening the molding time of the fiber reinforced resin. It aims to provide a method.

  In order to achieve the above object, a press molding apparatus according to the present invention comprises an upper mold and a lower mold, and is a press molding apparatus that press-molds a fiber reinforced resin with the upper mold and the lower mold. A first elastic sheet that is held by the upper die or the lower die and is disposed above the fiber reinforced resin during press molding, and a peripheral portion is held by the upper die or the lower die, and is press molded. And a second elastic sheet that is disposed below the fiber reinforced resin and sandwiches the fiber reinforced resin with the first elastic sheet during press molding.

  According to this, press molding can be performed in a short time by performing press molding while sandwiching the fiber reinforced resin between the two elastic sheets. And, when the fiber reinforced resin is molded into a three-dimensional shape, fiber disturbance occurs in the molding process, but by pressing while sandwiching the fiber reinforced resin between two elastic sheets, the fiber disturbance in the molding process Can be suppressed. Therefore, when the fiber reinforced resin is molded into a three-dimensional shape, the molding time of the fiber reinforced resin can be shortened.

  Preferably, further, a first wrinkle pressing portion that presses a peripheral edge portion of the fiber reinforced resin from above through the first elastic sheet during press molding, and the second elastic sheet during press molding. And a second wrinkle pressing portion for pressing the peripheral edge portion of the fiber reinforced resin from below.

  According to this, the peripheral part of fiber reinforced resin is pressed down during press molding. Thereby, press molding can be performed in a short time, suppressing generation | occurrence | production of the wrinkle at the time of a fiber reinforced resin deform | transforming during press molding.

  In addition, preferably, the fiber reinforced resin is further heated before press molding via at least one of the first elastic sheet and the second elastic sheet attached to at least one of the upper mold and the lower mold. A heater is provided.

  According to this, the fiber reinforced resin is heated before press molding via at least one of the two elastic sheets. Thereby, for example, when molding a fiber reinforced resin using a thermoplastic resin, the thermoplastic resin can be heated through the elastic sheet before press molding, and the time for heating the thermoplastic resin can be shortened. it can.

  Preferably, the upper mold includes a first holding member that holds the first elastic sheet so as to be movable up and down, and the lower mold includes a second holding member that holds the second elastic sheet so as to be movable up and down. The heater is disposed above the first elastic sheet and attached to the upper mold, and the second heater is disposed below the second elastic sheet and attached to the lower mold. The first heater and the second heater are heated through the first elastic sheet and the second elastic sheet while pressurizing the fiber reinforced resin before press molding.

  According to this, since the 1st elastic sheet and the 2nd elastic sheet are held so that raising and lowering is possible, with the 1st heater and the 2nd heater, via the 1st elastic sheet and the 2nd elastic sheet The fiber reinforced resin can be heated while being pressed before press molding. Here, by heating the fiber reinforced resin while applying pressure, heat conduction to the fiber reinforced resin is improved, and the fiber reinforced resin can be heated in a short time. Accordingly, for example, when a fiber reinforced resin using a thermoplastic resin is molded, the thermoplastic resin can be quickly heated with an elastic sheet before press molding, and the time for heating the thermoplastic resin can be shortened. .

  Preferably, both the first elastic sheet and the second elastic sheet are held by either the lower mold or the upper mold.

  Further, preferably, at least one of the upper mold and the lower mold further includes a biasing member that biases at least one peripheral edge of the first elastic sheet and the second elastic sheet in the outer circumferential direction.

  According to this, at least one peripheral part of two elastic sheets is urged | biased in an outer peripheral direction. Thereby, it can press-mold in a short time, suppressing generation | occurrence | production of a wrinkle in a fiber reinforced resin by suppressing that an elastic sheet wrinkles during press molding.

  In order to achieve the above object, the press molding method according to the present invention is a press molding method in which a press molding apparatus including an upper mold and a lower mold presses a fiber reinforced resin between the upper mold and the lower mold. A first placement step in which a first elastic sheet having a peripheral edge held by the upper mold or the lower mold is disposed above the fiber reinforced resin during press molding; A second placement step of placing a second elastic sheet held by the mold or the lower mold below the fiber reinforced resin during press molding, and the fibers by the first elastic sheet and the second elastic sheet. And a molding step of press molding while sandwiching the reinforced resin.

  According to this, press molding can be performed in a short time by performing press molding while sandwiching the fiber reinforced resin between the two elastic sheets. And, when the fiber reinforced resin is molded into a three-dimensional shape, fiber disturbance occurs in the molding process, but by pressing while sandwiching the fiber reinforced resin between two elastic sheets, the fiber disturbance in the molding process Can be suppressed. Therefore, when the fiber reinforced resin is molded into a three-dimensional shape, the molding time of the fiber reinforced resin can be shortened.

  Preferably, the forming step further includes a wrinkle pressing step for pressing a peripheral edge portion of the fiber reinforced resin with the first elastic sheet and the second elastic sheet.

  According to this, the peripheral part of fiber reinforced resin is pressed down during press molding. Thereby, press molding can be performed in a short time, suppressing generation | occurrence | production of the wrinkle at the time of a fiber reinforced resin deform | transforming during press molding.

  Preferably, the method further includes a heating step of heating the fiber reinforced resin before the molding step via at least one of the first elastic sheet and the second elastic sheet.

  According to this, the fiber reinforced resin is heated before press molding via at least one of the two elastic sheets. Thereby, for example, when molding a fiber reinforced resin using a thermoplastic resin, the thermoplastic resin can be heated through the elastic sheet before press molding, and the time for heating the thermoplastic resin can be shortened. it can.

  Preferably, further, before the forming step, the first elastic sheet is held in the upper mold so as to be movable up and down, and the second elastic sheet is held in the lower mold so as to be movable up and down, A heater is attached to the upper mold so as to be disposed above the first elastic sheet, and a second heater is attached to the lower mold so as to be disposed below the second elastic sheet. In the heating step, the fiber reinforced resin is heated while being pressurized through the first elastic sheet and the second elastic sheet by the first heater and the second heater.

  According to this, since the 1st elastic sheet and the 2nd elastic sheet are held so that raising and lowering is possible, with the 1st heater and the 2nd heater, via the 1st elastic sheet and the 2nd elastic sheet The fiber reinforced resin can be heated while being pressed before press molding. Here, by heating the fiber reinforced resin while applying pressure, heat conduction to the fiber reinforced resin is improved, and the fiber reinforced resin can be heated in a short time. Accordingly, for example, when a fiber reinforced resin using a thermoplastic resin is molded, the thermoplastic resin can be quickly heated with an elastic sheet before press molding, and the time for heating the thermoplastic resin can be shortened. .

  In addition, preferably, before the molding step, in a state where the fiber reinforced resin is sandwiched between the first elastic sheet and the second elastic sheet, both the first elastic sheet and the second elastic sheet, A holding step of holding either the lower mold or the upper mold.

  Still preferably, in the holding step, when the first elastic sheet and the second elastic sheet are held, at least one peripheral portion of the first elastic sheet and the second elastic sheet is arranged in the outer circumferential direction. An energizing step for energizing to.

  According to this, when attaching two elastic sheets, the peripheral part of at least one of two elastic sheets is urged | biased to an outer peripheral direction. Thereby, it can press-mold in a short time, suppressing generation | occurrence | production of a wrinkle in a fiber reinforced resin by suppressing that an elastic sheet wrinkles during press molding.

  According to the present invention, when a fiber reinforced resin is molded into a three-dimensional shape in a press molding apparatus that press-molds a fiber reinforced resin, the molding time of the fiber reinforced resin can be shortened.

It is an external view which shows the press molding apparatus in Embodiment 1 of this invention. It is sectional drawing which shows the structure of the press molding apparatus in Embodiment 1 of this invention in detail. It is a flowchart which shows an example of the shaping | molding process in which the press molding apparatus in Embodiment 1 of this invention press-molds fiber reinforced resin. It is a figure which shows the state by which the fiber reinforced resin in Embodiment 1 of this invention was arrange | positioned between the 1st elastic sheet and the 2nd elastic sheet. It is a flowchart which shows an example of the process which the press molding apparatus in Embodiment 1 of this invention press-molds while inserting fiber reinforced resin. It is a figure explaining the process in which the press molding apparatus in Embodiment 1 of this invention press-molds while inserting fiber reinforced resin. It is a figure which shows the structure of fiber reinforced resin. FIG. 9 is a cross-sectional view showing a configuration of a press forming apparatus in Modification 1 of Embodiment 1. FIG. 10 is a cross-sectional view showing a configuration of a press molding apparatus in Modification 2 of Embodiment 1. It is sectional drawing which shows the structure of the press molding apparatus in Embodiment 2 of this invention in detail. It is a flowchart which shows an example of the formation process in which the press molding apparatus in Embodiment 2 of this invention press-molds fiber reinforced resin. It is a flowchart which shows an example of the process in which the press molding apparatus in Embodiment 2 of this invention heats fiber reinforced resin. It is a figure which shows the state by which the heater was attached to the press molding apparatus in Embodiment 2 of this invention. It is a perspective view which shows the structure of the 1st heater in Embodiment 2 of this invention. It is a perspective view which shows the structure of the 2nd heater in Embodiment 2 of this invention. It is a figure which shows the state which the 1st heater and 2nd heater in Embodiment 2 of this invention heat while pressing a fiber reinforced resin. It is a figure which shows the state from which the 1st heater and 2nd heater in Embodiment 2 of this invention were removed. It is a figure which shows the state which the press molding apparatus in Embodiment 2 of this invention starts press molding, inserting | pinching fiber reinforced resin.

  EMBODIMENT OF THE INVENTION Below, the form for implementing this invention is demonstrated with reference to drawings.

(Embodiment 1)
FIG. 1 is an external view showing a press molding apparatus 10 according to Embodiment 1 of the present invention.

  The press molding apparatus 10 is an apparatus that press-molds a fiber reinforced resin into a three-dimensional shape. As shown in the figure, the press molding apparatus 10 includes an upper mold 100 and a lower mold 200, and the upper mold 100 and the lower mold 200 press-mold the fiber reinforced resin 20.

  The upper mold 100 is a press mold on the upper side of the press molding apparatus 10 and has a hemispherical recess formed at the center of the bottom. In addition, the shape of the recessed part of the upper mold | type 100 is not limited to a hemisphere, What is necessary is just a shape suitable for the molded article to manufacture. Further, the size and material of the upper mold 100 are not particularly limited, and may be any size and material suitable for the molded product.

  The lower mold 200 is a lower press molding die of the press molding apparatus 10 and includes a punch unit 210 therein. The punch portion 210 is a projecting portion whose upper portion is formed in a convex shape so as to fit into the concave portion of the upper mold 100.

  In addition, the shape of the upper part of the punch part 210 is not limited to a convex shape, and may be any shape as long as it is a shape suitable for a molded product, for example, a peripheral part has a planar shape. Further, the size and material of the lower mold 200 are not particularly limited, and may be any size and material suitable for the molded product.

  With this configuration, the press molding apparatus 10 sandwiches the fiber reinforced resin 20 between the upper mold 100 and the lower mold 200, and compresses the fiber reinforced resin 20 with the upper mold 100 and the punch portion 210, whereby the fiber reinforced resin 20 is compressed. 20 is press-molded. Details will be described later.

  Next, a detailed configuration of the press molding apparatus 10 will be described.

  FIG. 2 is a cross-sectional view showing in detail the configuration of the press molding apparatus 10 according to Embodiment 1 of the present invention. Specifically, FIG. 2 is a cross-sectional view showing a state in which the press molding apparatus 10 shown in FIG. 1 is cut in the vertical direction.

  As shown in the figure, in addition to the upper mold 100 and the lower mold 200, the press molding apparatus 10 includes a first elastic sheet 300, a second elastic sheet 400, a die cushion 500, a die cushion pin 510, a bolster 600, and a bed 700. It has.

  The first elastic sheet 300 is a disc-shaped elastic sheet having a peripheral edge held by the upper mold 100 and disposed above the fiber reinforced resin 20 during press molding. Specifically, the first elastic sheet 300 is disposed along the bottom surface portion of the upper mold 100 and is held by the upper mold 100.

  The second elastic sheet 400 is a disc-shaped elastic sheet having a peripheral edge held by the lower mold 200 and disposed below the fiber reinforced resin 20 during press molding. Specifically, the second elastic sheet 400 is disposed along the upper surface portion of the lower mold 200 and is held by the lower mold 200.

  Further, at least one of the first elastic sheet 300 and the second elastic sheet 400 is heated before press molding, and the first elastic sheet 300 and the second elastic sheet 400 are made of fiber reinforced resin during press molding. Sandwich.

  The first elastic sheet 300 and the second elastic sheet 400 may be any sheet as long as it has elasticity, and are, for example, rubber sheets. Further, the rubber used for the rubber sheet may be any component rubber as long as it has strength at the time of press molding, such as synthetic rubber such as silicon rubber and fluorine rubber, or natural rubber. .

  The upper mold 100 includes a first wrinkle pressing portion 110 and a first urging member 120. Further, the lower die 200 includes a second wrinkle pressing portion 220 and a second urging member 230 in addition to the punch portion 210.

  The first wrinkle pressing portion 110 is a portion that presses the peripheral edge portion of the fiber reinforced resin 20 from above through the first elastic sheet 300 during press molding. Specifically, the first wrinkle pressing portion 110 is a portion provided so as to cover the side of the concave portion of the upper mold 100 and presses the upper side of the peripheral portion of the fiber reinforced resin 20 over the entire circumference. The first wrinkle pressing portion 110 may be made of any material as long as the fiber reinforced resin 20 can be pressed in.

  The 2nd wrinkle pressing part 220 is a site | part which presses down the peripheral part of the fiber reinforced resin 20 from the downward direction via the 2nd elastic sheet 400 during press molding. Specifically, the second wrinkle pressing portion 220 is a metal part disposed so as to cover the side of the upper portion of the punch portion 210 and presses the lower side of the peripheral portion of the fiber reinforced resin 20 over the entire circumference. Include. In addition, the 2nd wrinkle pressing part 220 may not be a metal, and may be what kind of material as long as the fiber reinforced resin 20 can be pressed down.

  In addition, the 1st wrinkle press part 110 and the 2nd wrinkle press part 220 do not hold down the peripheral part of the fiber reinforced resin 20 over a perimeter, but hold down a part of peripheral part of the fiber reinforced resin 20. Also good.

  The first urging member 120 and the second urging member 230 are members that urge at least one peripheral edge of the first elastic sheet 300 and the second elastic sheet 400 in the outer circumferential direction. Here, the first urging member 120 urges the peripheral portion of the first elastic sheet 300 in the outer peripheral direction, and the second urging member 230 urges the peripheral portion of the second elastic sheet 400 in the outer peripheral direction. .

  The first urging member 120 is a spring that is disposed on the side of the first wrinkle pressing portion 110 and urges the peripheral edge of the first elastic sheet 300 in the outer circumferential direction. The first urging member 120 may not be a spring, and may be any member as long as it can urge the peripheral portion of the first elastic sheet 300 in the outer peripheral direction.

  The second urging member 230 is a spring that is disposed on the side of the second wrinkle pressing portion 220 and urges the peripheral edge of the second elastic sheet 400 in the outer circumferential direction. The second urging member 230 may not be a spring, and may be any member as long as it can urge the peripheral portion of the second elastic sheet 400 in the outer peripheral direction.

  The bolster 600 is a flat member attached to the upper surface of the bed 700 fixed to the floor surface. A punch 210 is attached to the upper surface of the bolster 600. The bolster 600 is provided with a plurality of holes penetrating in the vertical direction, and a rod-shaped die cushion pin 510 is inserted into each of the plurality of holes.

  The die cushion 500 is a member that supports the second wrinkle pressing portion 220 via a plurality of die cushion pins 510. The die cushion 500 has a function of raising and lowering the second wrinkle pressing portion 220 with respect to the punch portion 210.

  Next, a molding process in which the press molding apparatus 10 press-molds the fiber reinforced resin 20 will be described.

  FIG. 3 is a flowchart showing an example of a molding process in which the press molding apparatus 10 according to Embodiment 1 of the present invention press-molds the fiber reinforced resin 20. In the following, an example of a molding process for press molding the fiber reinforced resin 20 using a thermoplastic resin will be described.

  As shown in the drawing, first, the first elastic sheet 300 is held on the upper mold 100 by urging the peripheral portion of the first elastic sheet 300 in the outer peripheral direction by the first urging member 120 (S102).

  Moreover, the 2nd elastic sheet 400 is hold | maintained at the lower mold | type 200 by urging | biasing the peripheral part of the 2nd elastic sheet 400 to an outer peripheral direction by the 2nd urging | biasing member 230 (S104).

  Next, at least one of the first elastic sheet 300 and the second elastic sheet 400 is heated (S106). Here, both the first elastic sheet 300 and the second elastic sheet 400 are heated. The first elastic sheet 300 and the second elastic sheet 400 are heated by, for example, an electric heater, but the heating means is not limited and may be heated by any means.

  Specifically, in forming the fiber reinforced resin 20 using a thermoplastic resin, the first elastic sheet 300 and the second elastic sheet 400 are heated so that the fiber reinforced resin 20 is heated to a melting temperature or a softening temperature. Keep it. In the molding of the fiber reinforced resin 20 using a thermosetting resin, the process of heating the first elastic sheet 300 and the second elastic sheet 400 can be omitted.

  And the fiber reinforced resin 20 is arrange | positioned between the 1st elastic sheet 300 and the 2nd elastic sheet 400 (S108). Thereby, the fiber reinforced resin 20 can be heated via the first elastic sheet 300 and the second elastic sheet 400 before press molding.

  FIG. 4 is a diagram illustrating a state where the fiber reinforced resin 20 according to the first embodiment of the present invention is disposed between the first elastic sheet 300 and the second elastic sheet 400.

  As shown in the figure, a first elastic sheet 300 having a peripheral edge held by the upper mold 100 is disposed above the fiber reinforced resin 20. In addition, the second elastic sheet 400 having a peripheral edge held by the lower mold 200 is disposed below the fiber reinforced resin 20.

  Further, the fiber reinforced resin 20 has the first wrinkle presser so that the peripheral edge is pressed by the first wrinkle presser 110 and the second wrinkle presser 220 via the first elastic sheet 300 and the second elastic sheet 400. A peripheral portion is disposed between the portion 110 and the second wrinkle pressing portion 220.

  Here, the fiber reinforced resin 20 is a carbon fiber reinforced resin obtained by impregnating carbon fibers with a thermoplastic resin such as polyamide (PA) or polypropylene (PP). Specifically, a sheet in which a carbon fiber is impregnated with a thermoplastic resin is laminated in advance, and this is heated to a temperature at which the resin melts or softens, and then molding is performed.

  The heating method of the fiber reinforced resin 20 is not limited, and the fiber reinforced resin 20 may be heated in another place in advance and then loaded into the press molding apparatus 10, or an elastic sheet may be placed in the press molding apparatus 10. The fiber reinforced resin 20 may be heated through.

  The fiber reinforced resin 20 is not limited to a carbon fiber reinforced resin using a thermoplastic resin, and may be a carbon fiber reinforced resin using a thermosetting resin. In this case, a prepreg sheet impregnated with a thermosetting resin and semi-cured is laminated and molded by heating to room temperature or a softening temperature. Further, the fiber reinforced resin 20 is not limited to the carbon fiber reinforced resin, and may be any fiber reinforced resin such as a glass fiber reinforced resin.

  Returning to FIG. 3, the press molding apparatus 10 performs press molding while sandwiching the fiber reinforced resin 20 between the first elastic sheet 300 and the second elastic sheet 400 (S110). Details of the process of press molding while sandwiching the fiber reinforced resin 20 will be described later.

  As described above, the molding process in which the press molding apparatus 10 press-molds the fiber reinforced resin 20 ends.

  Next, the details of the process in which the press molding apparatus 10 performs press molding while sandwiching the fiber reinforced resin 20 (S108 in FIG. 3) will be described.

  FIG. 5 is a flowchart showing an example of a process in which the press molding apparatus 10 according to Embodiment 1 of the present invention performs press molding while sandwiching the fiber reinforced resin 20.

  FIG. 6 is a diagram illustrating a process in which the press molding apparatus 10 according to Embodiment 1 of the present invention performs press molding while sandwiching the fiber reinforced resin 20.

  As shown in FIG. 5, first, the upper mold 100 is lowered toward the lower mold 200 (S202).

  And the peripheral part of the fiber reinforced resin 20 is pressed down with the 1st elastic sheet 300 and the 2nd elastic sheet 400 (S204).

  FIG. 6A shows a state where the upper mold 100 is lowered. As shown in the drawing, the first elastic sheet 300 disposed along the lower surface portion of the upper mold 100 is placed on the second elastic sheet 400 disposed along the upper surface portion of the lower mold 200. It contacts the reinforced resin 20.

  Thereby, the peripheral part of the fiber reinforced resin 20 is pressed by the first wrinkle pressing part 110 and the second wrinkle pressing part 220 via the first elastic sheet 300 and the second elastic sheet 400.

  Returning to FIG. 5, the upper mold 100 is further lowered (S206). FIG. 6B further shows a process in which the upper mold 100 is lowered.

  That is, when the upper mold 100 is further lowered, the second wrinkle pressing portion 220 is lowered with respect to the punch portion 210. For this reason, as shown in FIG. 6B, the fiber reinforced resin 20 is pressed and deformed by the first elastic sheet 300 and the second elastic sheet 400 in order from the tip of the convex portion of the punch portion 210. That is, the fiber reinforced resin 20 is smoothly deformed along the fiber orientation while being always pressed by the first elastic sheet 300 and the second elastic sheet 400 during deformation.

  At this time, the first wrinkle pressing portion 110 and the second wrinkle pressing portion 220 press the peripheral edge portion of the fiber reinforced resin 20, but with the deformation of the fiber reinforced resin 20, the peripheral edge portion of the fiber reinforced resin 20 becomes a fiber. It is allowed to slide in the orientation direction.

  Returning to FIG. 5, next, the upper mold 100 stops descending (S208). FIG. 6C shows a state in which the upper mold 100 has stopped descending.

  As shown in FIG. 6C, when the upper mold 100 is lowered to the final position, the lowering is stopped. The final position at which the upper mold 100 stops is a position at which a compressive stress is applied evenly in the thickness direction of the fiber reinforced resin 20, and is determined by the pushing amount and pushing load of the punch unit 210.

  In addition, the upper mold 100 is selected to have an optimal descending speed so that the fibers of the fiber reinforced resin 20 can be smoothly deformed, and to maintain a predetermined pressure after reaching the final position. This position is maintained until 20 is solidified.

  Here, in the molding of the fiber reinforced resin 20 using a thermoplastic resin, the fiber reinforced resin 20 is cooled and solidified while the fiber reinforced resin 20 is held for a predetermined time. For example, the fiber reinforced resin 20 can be quickly cooled by cooling the upper mold 100 and the lower mold 200 with cooling water.

  In the molding of the fiber reinforced resin 20 using a thermosetting resin, the molded body is heated and cured in a state where the shape of the molded body of the fiber reinforced resin 20 is held by the upper mold 100 and the lower mold 200. Let

  As described above, the press molding apparatus 10 performs press molding while sandwiching the fiber reinforced resin 20 (S108 in FIG. 3).

  Next, the effect by performing press molding with the press molding apparatus 10 according to the first embodiment will be described.

  FIG. 7 is a view showing the structure of the fiber reinforced resin 20.

  (A) of the figure shows the structure of the fiber reinforced resin 20 before molding. As shown in the figure, the fiber reinforced resin 20 is obtained by laminating sheets in which carbon fibers are oriented in one direction alternately. In the same figure, the example which laminated | stacked the sheet | seat A and the sheet | seat B by changing direction alternately is shown.

  (B) of the figure has shown the structure of the fiber reinforced resin 20 at the time of press molding by the three-dimensional expression. Here, for example, when the fiber reinforced resin 20 using a thermoplastic resin is molded into a three-dimensional shape, fiber disturbance occurs in the molding process. That is, when the fiber reinforced resin 20 is molded into a three-dimensional shape, the fibers of the fiber reinforced resin 20 being molded cannot follow the drawing or bending process, and the fibers are displaced in the width direction perpendicular to the fiber orientation direction. Thus, wrinkles and folding occur. For example, if the fibers are displaced in the width direction (Y direction shown in the figure) instead of the orientation direction of the sheet A (X direction shown in the figure), wrinkles and folding occur.

  On the other hand, the fiber reinforced resin 20 is sequentially formed from the tip of the convex portion of the punch portion 210 by press molding while sandwiching the fiber reinforced resin 20 between the two elastic sheets of the first elastic sheet 300 and the second elastic sheet 400. Pressure is applied. Then, during the deformation of the fiber reinforced resin 20, the two elastic sheets sandwich the fiber reinforced resin 20, and the deformation is advanced while restraining the thickness direction of the fiber reinforced resin 20. Therefore, the fiber orientation direction of the fiber reinforced resin 20 The fiber reinforced resin 20 can be deformed into a molded shape without changing.

  For this reason, the fiber reinforced resin 20 is smoothly deformed along the fiber orientation direction while being always pressed by the first elastic sheet 300 and the second elastic sheet 400 during deformation.

  That is, for example, in the sheet A, fibers are displaced and deformed in the alignment direction (X direction shown in the figure), and in the sheet B, the fibers are deformed and displaced in the alignment direction (Y direction shown in the figure). Further, since the two layers of the sheet A and the sheet B are not bonded, the deformation of the fiber in one layer does not affect the deformation of the fiber in the upper and lower layers in contact therewith.

  For this reason, when press-molding the fiber reinforced resin 20 into a three-dimensional shape, it is possible to suppress the fiber from shifting in the width direction of the fiber, and to suppress the disorder of the fiber during the molding process.

  Further, in the molding of the fiber reinforced resin 20 using a thermoplastic resin, cooling and solidification are performed in a short time after molding, so that a molded product can be obtained in a short time.

  In addition, when the fiber reinforced resin 20 using a thermoplastic resin is molded, the heated fiber reinforced resin 20 is molded by pressing while sandwiching the fiber reinforced resin 20 between two elastic sheets. In S202 to S206), the rapid cooling can be prevented, so that the time for heating the fiber reinforced resin 20 in advance can be shortened.

  Further, press molding while covering the surface of the fiber reinforced resin 20 with two elastic sheets prevents the upper mold 100 and the lower mold 200 and the fiber reinforced resin 20 from contacting each other. For this reason, the fiber reinforced resin 20 can be prevented from sticking to the upper mold 100 and the lower mold 200 after press molding.

  Further, it is not necessary to separate the upper mold 100 and the lower mold 200 from the fiber reinforced resin 20 after the press molding is completed, and the fiber reinforced resin 20 can be easily detached from the press molding apparatus 10. For example, in the case of molding the fiber reinforced resin 20 using a thermoplastic resin, the first elastic sheet 300 is also separated when the upper mold 100 is raised after cooling and solidifying. The fiber reinforced resin 20 can be molded.

  Further, during press molding, the peripheral edge of the fiber reinforced resin 20 is pressed over the entire circumference. Thereby, generation | occurrence | production of the wrinkle at the time of the fiber reinforced resin 20 deform | transforming during press molding can be suppressed.

  The fiber reinforced resin is heated before press molding via at least one of the two elastic sheets. Accordingly, for example, when the fiber reinforced resin 20 using a thermoplastic resin is molded, the thermoplastic resin can be heated through the elastic sheet before press molding, and the time for heating the thermoplastic resin can be shortened. Can do.

  In addition, the peripheral edge of at least one of the two elastic sheets is urged in the outer circumferential direction. Thereby, it can suppress that wrinkles generate | occur | produce in the fiber reinforced resin 20 by suppressing that a wrinkle arises in an elastic sheet during press molding.

  For these reasons, when the fiber reinforced resin 20 is molded into a three-dimensional shape by the press molding apparatus 10, the molding time of the fiber reinforced resin 20 can be shortened.

  In addition, the press forming apparatus 10 can be realized by attaching the first elastic sheet 300 and the second elastic sheet 400 to a press forming apparatus that is generally used for forming a metal plate. be able to.

  In addition, the structure shown by the following modifications may be sufficient as the press molding apparatus 10 in this Embodiment 1. FIG.

(Modification 1)
A first modification of the first embodiment will be described.

  FIG. 8 is a cross-sectional view showing a configuration of press forming apparatus 10 in Modification 1 of Embodiment 1.

  As shown in the figure, in the press molding apparatus 10 according to the first modification, the upper die 100 is provided with a punch portion 130, and a hemispherical concave portion is formed in the upper center portion of the lower die 200.

  Further, both the first elastic sheet 300 and the second elastic sheet 400 are held by the lower mold 200. Specifically, the first elastic sheet 300 and the second elastic sheet 400 are both in the lower mold 200 in a state where the fiber reinforced resin 20 is sandwiched between the first elastic sheet 300 and the second elastic sheet 400 before press molding. Is held in.

  Further, the first wrinkle presser part 110 and the second wrinkle presser part 220 are not provided in the upper mold 100 and the lower mold 200 as in the first embodiment, respectively. Both the two wrinkle pressers 220 are provided in the lower mold 200. That is, before press molding, the peripheral portion of the fiber reinforced resin 20 is pressed by the first wrinkle pressing portion 110 and the second wrinkle pressing portion 220 via the first elastic sheet 300 and the second elastic sheet 400. And the upper mold | type 100 descend | falls in the state in which the peripheral part of the fiber reinforced resin 20 was pressed down, and press molding is performed.

  As described above, since both the first wrinkle pressing portion 110 and the second wrinkle pressing portion 220 are provided in the lower mold 200, the pressure for pressing the peripheral edge portion of the fiber reinforced resin 20 can be easily adjusted before press molding. be able to.

  Note that both the first wrinkle pressing portion 110 and the second wrinkle pressing portion 220 may be provided in the upper mold 100, and both the first elastic sheet 300 and the second elastic sheet 400 may be held by the upper mold 100.

  Then, the molding process in which the press molding apparatus 10 in the first modified example press-molds the fiber reinforced resin 20 is the same as the molding process in the first embodiment, and the first elastic sheet 300 and the second elastic sheet 400 are the same. The peripheral portion of the fiber reinforced resin 20 is pressed and press-molded while the fiber reinforced resin 20 is sandwiched.

  In addition, when the fiber reinforced resin 20 is a fiber reinforced resin using a thermoplastic resin, the fiber reinforced resin 20 is heated by the first elastic sheet 300 and the second elastic sheet 400 before press molding.

  As described above, the configuration of the press molding apparatus 10 according to the first modification also achieves the same effect as that of the first embodiment, and when the fiber reinforced resin 20 is molded into a three-dimensional shape, the fiber reinforced resin 20 molding time can be shortened.

(Modification 2)
Next, a second modification of the first embodiment will be described.

  FIG. 9 is a cross-sectional view showing a configuration of press forming apparatus 10 in Modification 2 of Embodiment 1.

  In the press molding apparatus 10 according to the second modification, each elastic sheet has two layers, and a compression acting in the thickness direction of the fiber reinforced resin 20 is performed by inserting a viscoelastic body or liquid such as a gel between the two layers. The stress can be made uniform over the entire molding surface.

  Specifically, as shown in the figure, the first elastic sheet 300 includes a rubber sheet 310, a rubber sheet 320, and an insert 330 between the rubber sheet 310 and the rubber sheet 320. Similarly, the second elastic sheet 400 includes a rubber sheet 410, a rubber sheet 420, and an insert 430 between the rubber sheet 410 and the rubber sheet 420.

  The inserts 330 and 430 are viscoelastic bodies or liquids such as silicon jelly, silicon oil, and oil.

  The molding process in which the press molding apparatus 10 in the second modification example press-molds the fiber reinforced resin 20 is the same as the molding process in the first embodiment, and the first elastic sheet 300 and the second elastic sheet 400 are the same. The peripheral portion of the fiber reinforced resin 20 is pressed and press-molded while the fiber reinforced resin 20 is sandwiched.

  Thus, each elastic sheet is provided with the inserts 330 and 430 between the two rubber sheets, whereby the pressure in the thickness direction of the fiber reinforced resin 20 can be made uniform. For this reason, when the fiber reinforced resin 20 is press-molded into a three-dimensional shape, the fiber is smoothly deformed along the orientation direction, and the disturbance of the fiber during the molding process can be further suppressed.

  In addition, when the fiber reinforced resin 20 is a fiber reinforced resin using a thermoplastic resin, the fiber reinforced resin 20 is heated by the first elastic sheet 300 and the second elastic sheet 400 before press molding. In this case, the heat retention performance of the fiber reinforced resin 20 can be improved by providing each elastic sheet with the two rubber sheets and the inserts 330 and 430.

  As described above, the configuration of the press molding apparatus 10 according to the second modification also achieves the same effect as that of the first embodiment, and when the fiber reinforced resin 20 is molded into a three-dimensional shape, the fiber reinforced resin 20 molding time can be shortened.

(Embodiment 2)
In the first embodiment, after the first elastic sheet 300 and the second elastic sheet 400 are heated, the fiber-reinforced resin 20 is disposed between the first elastic sheet 300 and the second elastic sheet 400, and press molding is performed. It was decided to do. However, in the second embodiment, the fiber reinforced resin 20 is heated by applying pressure and heating in a state where the fiber reinforced resin 20 is disposed between the first elastic sheet 300 and the second elastic sheet 400.

  FIG. 10 is a cross-sectional view showing in detail the configuration of the press molding apparatus 10 according to the second embodiment of the present invention.

  As shown in the figure, in the press molding apparatus 10, in addition to the configuration shown in FIG. 2, the upper mold 100 includes a first holding member 140, and the lower mold 200 includes a second holding member 240. The constituent elements other than the first holding member 140 and the second holding member 240 have the same functions as those shown in FIG.

  The first holding member 140 is a member for holding the first elastic sheet 300 so as to be movable up and down, and a plurality of the first holding members 140 are provided on the side of the first wrinkle pressing portion 110 corresponding to the first urging member 120. Yes. Note that the number of the first holding members 140 may be three as long as the first elastic sheet 300 can be held, but is three, for example. The first holding member 140 includes a first guide member 141 and a first elastic member 142.

  The first guide member 141 is a metal columnar member that guides the vertical movement of the first elastic sheet 300. The first guide member 141 is not limited to a metal columnar member, and can guide the vertical movement of the first elastic sheet 300 such as a resin rectangular parallelepiped member. For example, any material and shape may be used.

  The first elastic member 142 is a metal spring that urges the first elastic sheet 300 in the vertical direction. The first elastic member 142 is not limited to a metal spring, and may be any elastic member such as rubber.

  As described above, the first holding member 140 holds the first elastic sheet 300 while the first guide member 141 and the first elastic member 142 hold the first elastic sheet 300, and the bottom portion of the first wrinkle holding unit 110. It is possible to move up and down between a position that is a predetermined distance downward from the position and a position that is in contact with the bottom surface of the first wrinkle presser 110.

  The second holding member 240 is a member for holding the second elastic sheet 400 so as to be movable up and down, and a plurality of second holding members 240 are provided on the side of the second wrinkle pressing portion 220 corresponding to the second urging member 230. Yes. Note that the number of the second holding members 240 may be three as long as the second elastic sheet 400 can be held, but is three, for example. The second holding member 240 includes a second guide member 241 and a second elastic member 242.

  The second guide member 241 is a metal columnar member that guides the vertical movement of the second elastic sheet 400. Note that the second guide member 241 is not limited to a metal rod-shaped member, and may be, for example, a resin-shaped rectangular parallelepiped member, as long as it can guide the vertical movement of the second elastic sheet 400. Any material and shape may be used.

  The second elastic member 242 is a metal spring that urges the second elastic sheet 400 in the vertical direction. The second elastic member 242 is not limited to a metal spring, and may be any elastic member such as rubber.

  As described above, the second holding member 240 holds the second elastic sheet 400 by the second guide member 241 and the second elastic member 242, and holds the second elastic sheet 400 on the upper surface portion of the second wrinkle holding unit 220. It is possible to move up and down between a position that is a predetermined distance away from the position and a position that contacts the upper surface of the second wrinkle presser 220.

  Next, a molding process in which the press molding apparatus 10 according to the second embodiment press-molds the fiber reinforced resin 20 will be described.

  FIG. 11 is a flowchart illustrating an example of a molding process in which the press molding apparatus 10 according to the second embodiment of the present invention press-molds the fiber reinforced resin 20. In the following, an example of a molding process for press molding the fiber reinforced resin 20 using a thermoplastic resin will be described.

  As shown in the figure, first, the first elastic sheet 300 is held by the first holding member 140 via the first urging member 120 so as to be movable up and down (S302).

  Further, the second elastic sheet 400 is held by the second holding member 240 via the second urging member 230 so as to be movable up and down on the lower mold 200 (S304).

  Next, the fiber reinforced resin 20 is disposed between the first elastic sheet 300 and the second elastic sheet 400 (S306).

  Then, the fiber reinforced resin 20 is heated (S308). Details of the process in which the press molding apparatus 10 heats the fiber reinforced resin 20 will be described later.

  The press molding apparatus 10 performs press molding while sandwiching the fiber reinforced resin 20 between the first elastic sheet 300 and the second elastic sheet 400 (S310). The details of the process of press molding while sandwiching the fiber reinforced resin 20 is the same as the molding process shown in FIGS. 3 and 5 (S108 in FIG. 3 and S202 to S208 in FIG. 5), and thus detailed description will be given. Is omitted.

  As described above, the molding process in which the press molding apparatus 10 press-molds the fiber reinforced resin 20 ends.

  Next, the details of the process (S308 in FIG. 11) in which the press molding apparatus 10 in the second embodiment heats the fiber reinforced resin 20 will be described.

  FIG. 12 is a flowchart illustrating an example of a process in which the press molding apparatus 10 according to the second embodiment of the present invention heats the fiber reinforced resin 20.

  As shown in the figure, a heater is first attached to the press molding apparatus 10 (S402).

  FIG. 13 is a diagram showing a state where a heater is attached to the press molding apparatus 10 according to Embodiment 2 of the present invention.

  As shown in the figure, a disk-shaped first heater 150 is attached to the upper mold 100, and a disk-shaped second heater 250 is attached to the lower mold 200.

  Specifically, the first heater 150 is disposed above the first elastic sheet 300 and is detachably attached to the upper mold 100. Moreover, the 2nd heater 250 is arrange | positioned under the 2nd elastic sheet 400, and is attached to the lower mold | type 200 so that removal is possible.

  14A and 14B are diagrams showing configurations of the first heater 150 and the second heater 250 according to Embodiment 2 of the present invention. Specifically, FIG. 14A is a perspective view showing the configuration of the first heater 150, and FIG. 14B is a perspective view showing the configuration of the second heater 250.

  As illustrated in FIG. 14A, the first heater 150 includes a first iron plate 151, a first heat insulating plate 152, and a first heater plate 153.

  The first iron plate 151 is a flat plate made of iron, and is attached to the upper die 100 so that the upper surface portion is in contact with the first wrinkle pressing portion 110 of the upper die 100. The first heat insulating plate 152 is a plate-shaped heat insulating material for preventing the heat of the first heater plate 153 from being transmitted to the upper mold 100. The first heater plate 153 is a copper plate with a built-in heater, and heats the fiber reinforced resin 20 via the first elastic sheet 300.

  As shown in FIG. 14B, the second heater 250 includes a second iron plate 251, a second heat insulating plate 252, and a second heater plate 253, similar to the first heater 150.

  The second iron plate 251 is a flat plate made of iron, and is attached to the lower die 200 so that the lower surface portion comes into contact with the second wrinkle pressing portion 220 of the lower die 200. The second heat insulating plate 252 is a plate-shaped heat insulating material for preventing the heat of the second heater plate 253 from being transmitted to the lower mold 200. The second heater plate 253 is a copper plate with a built-in heater, and heats the fiber reinforced resin 20 via the second elastic sheet 400.

  In addition, if the 1st heater 150 and the 2nd heater 250 can heat the fiber reinforced resin 20 via the 1st elastic sheet 300 and the 2nd elastic sheet 400, a structure will be limited to the above thing. Not.

  Returning to FIG. 12, next, the upper mold 100 is lowered toward the lower mold 200 (S404). When the first heater 150 and the second heater 250 are in a state of pressing and sandwiching the fiber reinforced resin 20 via the first elastic sheet 300 and the second elastic sheet 400, the upper mold 100 is lowered. Stop.

  Then, the first heater 150 and the second heater 250 heat the fiber reinforced resin 20 while applying pressure (S406).

  FIG. 15 is a diagram illustrating a state in which the first heater 150 and the second heater 250 in the second embodiment of the present invention heat the fiber reinforced resin 20 while applying pressure.

  As shown in the figure, the first heater 150 and the second heater 250 heat the fiber reinforced resin 20 through the first elastic sheet 300 and the second elastic sheet 400 while applying pressure. The heating time may be a time during which the fiber reinforced resin 20 is heated to a predetermined temperature, and is, for example, about 10 seconds.

  The vertical positions of the first elastic sheet 300 and the second elastic sheet 400 are adjusted by the first holding member 140 and the second holding member 240, respectively. In addition, the first holding member 140 and the second holding member 240 are disposed at positions that do not interfere with each other, such as the position on the plane being shifted by 45 degrees.

  Returning to FIG. 12, next, the first heater 150 is removed from the upper mold 100, and the second heater 250 is removed from the lower mold 200 (S408).

  FIG. 16 is a diagram illustrating a state where the first heater 150 and the second heater 250 are removed in the second embodiment of the present invention.

  As shown in the figure, the first heater 150 attached to the upper mold 100 is removed from the upper mold 100, and the second heater 250 attached to the lower mold 200 is removed from the lower mold 200. .

  As shown in FIG. 15, the upper mold 100 has been lowered to the state in which the fiber reinforced resin 20 is pressed and sandwiched, and therefore the upper mold 100 includes the first heater 150 and the second heater 250. It raises until it will be in the state which is not pressurizing the fiber reinforced resin 20 so that it can remove. Then, the first heater 150 and the second heater 250 are removed.

  FIG. 17 is a diagram illustrating a state in which the press molding apparatus 10 according to Embodiment 2 of the present invention starts press molding while sandwiching the fiber reinforced resin 20.

  As shown in the figure, the upper mold 100 descends toward the lower mold 200 from the state shown in FIG. At this time, the first holding member 140 raises the first elastic sheet 300 toward the upper mold 100, and the second holding member 240 lowers the second elastic sheet 400 toward the lower mold 200.

  As described above, the process of heating the fiber reinforced resin 20 by the press molding apparatus 10 according to the second embodiment (S308 in FIG. 11) ends.

  As described above, according to the press molding apparatus 10 according to the second embodiment, the first elastic sheet 300 and the second elastic sheet 400 are held so as to be movable up and down, so the first heater 150 and the second heater 250. And the first heater 150 and the second heater 250 are heated while pressurizing the fiber reinforced resin 20 before press molding. Here, by heating the fiber reinforced resin 20 while applying pressure, heat conduction to the fiber reinforced resin 20 is improved, and the fiber reinforced resin 20 can be heated in a short time. Accordingly, for example, when the fiber reinforced resin 20 using a thermoplastic resin is molded, the thermoplastic resin can be quickly heated with the elastic sheet before press molding, and the time for heating the thermoplastic resin can be shortened. it can.

  As described above, the press molding apparatus 10 according to the present invention has been described using the above-described embodiment and modifications thereof, but the present invention is not limited to this.

  In other words, it should be considered that the embodiment and its modification disclosed this time are illustrative and not restrictive in all respects. The scope of the present invention is defined by the terms of the claims, rather than the description above, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims.

  Moreover, you may combine each component in said several embodiment and its modification arbitrarily in the range which does not deviate from the meaning of invention.

  For example, in the first and second embodiments, the upper mold 100 and the lower mold 200 include the first urging member 120 and the second urging member 230, and the peripheral portions of the first elastic sheet 300 and the second elastic sheet 400. Was biased toward the outer circumference. However, either the upper mold 100 or the lower mold 200 may include the urging member, and neither the upper mold 100 nor the lower mold 200 may include the urging member. Good.

  In the first and second embodiments, the first elastic sheet 300 and the second elastic sheet 400 have a disc shape. However, the shape of the 1st elastic sheet 300 and the 2nd elastic sheet 400 is not limited to disk shape, A rectangle or another shape may be sufficient if it is a shape suitable for shaping | molding.

  In the first and second embodiments, the first heater 150 and the second heater 250 have a disc shape. However, the shape of the first heater 150 and the second heater 250 is not limited to a disk shape, and may be a rectangle or other shapes as long as it is a shape suitable for molding.

  Moreover, in the said Embodiment 1, as shown in the modification 2, you may decide to insert a viscoelastic body or a liquid in each elastic sheet of the 1st elastic sheet 300 and the 2nd elastic sheet 400. However, in the second embodiment as well, a viscoelastic body or a liquid may be inserted into each elastic sheet of the first elastic sheet 300 and the second elastic sheet 400.

  In the second embodiment, the first heater 150 and the second heater 250 are detachably attached to the upper mold 100 and the lower mold 200, respectively. However, the first heater 150 and the second heater 250 may be fixedly attached to the upper mold 100 and the lower mold 200 so as to be integrated with the upper mold 100 and the lower mold 200, respectively. . In this case, the upper mold 100 and the lower mold 200 are press-molded with the fiber reinforced resin 20 sandwiched between the first heater 150 and the second heater 250 and the first elastic sheet 300 and the second elastic sheet 400. .

  In the second embodiment, the first heater 150 is attached to the upper mold 100 and the second heater 250 is attached to the lower mold 200. However, the first heater 150 may not be attached to the upper mold 100 and only the second heater 250 may be attached to the lower mold 200. Further, the second heater 250 may not be attached to the lower mold 200, and only the first heater 150 may be attached to the upper mold 100.

  By adopting the press molding apparatus and press molding method according to the present invention, it is possible to produce a molded body of carbon fiber reinforced resin with extremely high strength in a high cycle, so that it is possible to produce lightweight and high strength parts such as automobile body parts. It can be done in a high cycle.

DESCRIPTION OF SYMBOLS 10 Press molding apparatus 20 Fiber reinforced resin 100 Upper mold | type 110 1st wrinkle pressing part 120 1st biasing member 130 Punch part 140 1st holding member 141 1st guide member 142 1st elastic member 150 1st heater 151 1st iron plate 152 1st heat insulation board 153 1st heater plate 200 Lower mold | type 210 Punch part 220 2nd wrinkle pressing part 230 2nd biasing member 240 2nd holding member 241 2nd guide member 242 2nd elastic member 250 2nd heater 251 1st 2 Iron plate 252 Second heat insulating plate 253 Second heater plate 300 First elastic sheet 310, 320 Rubber sheet 330 Insert 400 Second elastic sheet 410, 420 Rubber sheet 430 Insert

Claims (10)

A press molding apparatus comprising an upper mold and a lower mold, and press-molding a fiber reinforced resin with the upper mold and the lower mold,
A first elastic sheet having a peripheral edge held by the upper mold or the lower mold and disposed above the fiber reinforced resin during press molding;
The second elasticity is held by the upper die or the lower die, and is disposed below the fiber reinforced resin during press molding, and the fiber reinforced resin is sandwiched between the first elastic sheet during press molding. With seats ,
At least one of the upper mold and the lower mold further includes a biasing member that biases at least one peripheral edge of the first elastic sheet and the second elastic sheet in the outer circumferential direction.
Flop-less molding apparatus. further,
A first wrinkle pressing portion that presses the peripheral edge portion of the fiber reinforced resin from above through the first elastic sheet during press molding;
The press molding apparatus according to claim 1, further comprising a second wrinkle pressing portion that presses a peripheral edge portion of the fiber reinforced resin from below through the second elastic sheet during press molding. further,
2. A heater attached to at least one of the upper mold and the lower mold and configured to heat the fiber reinforced resin before press molding via at least one of the first elastic sheet and the second elastic sheet. Or the press molding apparatus of 2. The upper mold includes a first holding member that holds the first elastic sheet so as to be movable up and down.
The lower mold includes a second holding member that holds the second elastic sheet so as to be movable up and down,
The heater is
A first heater disposed above the first elastic sheet and attached to the upper mold;
A second heater disposed below the second elastic sheet and attached to the lower mold,
4. The press molding according to claim 3, wherein the first heater and the second heater heat the fiber reinforced resin while pressing the fiber reinforced resin before press molding via the first elastic sheet and the second elastic sheet. 5. apparatus. The press molding apparatus according to any one of claims 1 to 3, wherein both the first elastic sheet and the second elastic sheet are held by either the lower mold or the upper mold. A press molding apparatus comprising an upper mold and a lower mold is a press molding method for press-molding a fiber reinforced resin with the upper mold and the lower mold,
A first disposing step of disposing a first elastic sheet having a peripheral edge held by the upper mold or the lower mold above the fiber-reinforced resin during press molding;
A second disposing step of disposing a second elastic sheet having a peripheral edge held by the upper mold or the lower mold below the fiber reinforced resin during press molding;
A molding step of press molding while sandwiching the fiber reinforced resin between the first elastic sheet and the second elastic sheet ;
Prior to the forming step, an urging step for urging at least one peripheral edge of the first elastic sheet and the second elastic sheet in the outer circumferential direction by an urging member included in at least one of the upper mold and the lower mold. And a press forming method. The press molding method according to claim 6 , wherein the molding step further includes a wrinkle pressing step of pressing a peripheral edge portion of the fiber reinforced resin with the first elastic sheet and the second elastic sheet. further,
The first elastic sheet and through at least one of the second elastic sheet, press forming method according to claim 6 or 7 of the fiber-reinforced resin comprises a heating step of heating before the forming step. Furthermore, before the molding step,
Holding the first elastic sheet to be movable up and down on the upper mold, and holding the second elastic sheet to be movable up and down on the lower mold;
A first heater is attached to the upper mold so as to be disposed above the first elastic sheet, and a second heater is attached to the lower mold so as to be disposed below the second elastic sheet. Including an attachment step,
Wherein the heating step is between the second heater and the first heater, through the first elastic sheet and said second elastic sheet, according to claim 8 is heated under pressure the fiber-reinforced resin Press molding method. further,
Prior to the molding step, the first elastic sheet and the second elastic sheet are both placed in the lower mold or the upper mold in a state where the fiber reinforced resin is sandwiched between the first elastic sheet and the second elastic sheet. A press forming method according to any one of claims 6 to 8 , further comprising: a holding step of holding any one of the steps.

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