JP2006264280A - Filament winding apparatus, molded article formed by the apparatus, and molding method of molded article - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a filament winding apparatus which enables the integral molding of a concave portion and a molded article. <P>SOLUTION: The filament winding apparatus 1 winds a complex material 100 supplied from a creel 80 through a resin tank 90 to a rotating mandrel 10 to form and shape the molded article, and is further provided with an interior pressure-applying device which has a shape corresponding to a shape of the concave portion to be molded, and has a first inner pressure-applying portion movable along a radial direction of the mandrel 10, and an outer pressure-applying device 40 having a shape corresponding to the shape of the concave portion to be molded, and has a first outer pressure-applying portion movable along the radial direction of the mandrel 10. The inner pressure-applying device is provided inside the mandrel 10 such that the first inner pressure-applying portion be exposed outside via an opening 13 formed on an outer peripheral surface of the mandrel 10, and the outer pressure-applying device 40 is provided outside the mandrel 10 such that the first outer pressure-applying portion be opposed to the first inner pressure-applying portion. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a filament winding apparatus for forming a molded article by winding a composite material around a rotating mandrel, a molded article molded using the apparatus, and a molding method for the molded article.

  As a technique for forming a hollow molded product with a composite material, a filament winding method in which the composite material is wound around a rotating mandrel to form the molded product is conventionally known (see, for example, Patent Documents 1 and 2). As a typical molded product molded by this filament winding method, for example, a pressure tank can be cited.

  Usually, a valve is attached to the tank. Therefore, a space can be reduced by forming a concave portion in a part of the tank and installing a valve in the concave portion.

However, in the conventional filament winding method, a technique for integrally forming a convex part in a hollow molded product is known (for example, see Patent Document 2), but a technique for integrally forming a concave part is not known. The space cannot be reduced by forming a part of the tank in a concave shape.
JP-A-10-128858 Japanese Patent Laid-Open No. 04-364929

An object of this invention is to provide the filament winding apparatus which can integrally mold a recessed part in a molded article, the molded article shape | molded using this apparatus, and the shaping | molding method of a molded article.
In order to achieve the above object, according to the present invention, a mandrel supported rotatably and a supply means capable of supplying a composite material to the mandrel are provided and supplied to the rotating mandrel from the supply means. A filament winding device for forming a molded product by winding the composite material, wherein the first inner pressing portion has a shape corresponding to the shape of the concave portion to be molded and is movable along the radial direction of the mandrel An inner pressing means having a shape corresponding to the shape of the concave portion to be molded, and an outer pressing means having a first outer pressing portion movable along the radial direction of the mandrel, The inner pressing means is disposed inside the mandrel so as to expose the first inner pressing portion to the outside through an opening formed on the outer peripheral surface of the mandrel. The outer pressing means uses a filament winding device provided outside the mandrel so that the first outer pressing portion faces the first inner pressing portion, and the device. A molded article is provided.

  In order to achieve the above object, according to the present invention, there is provided a method of forming a molded product by winding a composite material around a rotating mandrel, wherein the position where the concave portion should be formed on the outer peripheral surface of the mandrel is convex. A winding step of winding the composite material in a raised state, and a deformation step of deforming the convex portion of the composite material wound around the mandrel into a concave shape by pressing toward the radially inner side of the mandrel And a method for forming a molded article comprising:

  In the present invention, the composite material is wound in a state where the concave portion of the mandrel is convexly formed by the first inner pressing portion of the inner pressing means, and the first outer side of the outer pressing means is wound around the convex portion. The diameter of the mandrel is set between the first inner pressing portion and the first outer pressing portion in a state where the pressing portion is brought into contact with the composite material sandwiched between the first inner pressing portion and the first outer pressing portion. The convex portion is deformed into a concave shape by simultaneously moving toward the inner side in the direction, and then the composite material is released by moving the first inner pressing portion and the first outer pressing portion in the separating direction.

  In this way, the position where the concave portion is to be formed on the outer peripheral surface of the mandrel is raised in advance in a convex shape, and after the composite material is wound around the mandrel, the convex portion formed in the convex shape in the composite material is concave. To be reversed. Thereby, it becomes possible to integrally mold the concave portion in the molded product molded from the composite material.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  1 is a schematic perspective view showing an entire filament winding apparatus according to an embodiment of the present invention, FIG. 2 is a cross-sectional view of a mandrel and each pressing apparatus according to an embodiment of the present invention, and FIG. 3 is an enlarged view of a portion III in FIG. 4 is an air piping diagram of the filament winding apparatus according to the embodiment of the present invention, and FIG. 5 is a cross-sectional view showing the locking mechanism in the embodiment of the present invention.

  A filament winding apparatus 1 according to an embodiment of the present invention uses a fiber reinforced composite material (FRP: Fiber Reinforced Plastic) composed of a synthetic resin material and a reinforcing fiber as a matrix (base material), for example, a pressure tank or a propeller shaft. It is an apparatus for molding a cylindrical or tubular molded article such as the like.

  As shown in FIG. 1, the filament winding apparatus 1 impregnates a reinforcing fiber fed from a creel 80 with a synthetic resin material stored in a resin tank 90 and then feeds it to a rotating mandrel 10 (not shown). ) To wrap the composite material 100 to form a molded product. The resin tank 90 is movable in the direction indicated by the arrow A in the figure, and the mandrel 10 is supported by the gantry 70 so as to be rotatable about the rotation shaft 11 and is connected by the motor 30 connected via the belt 31 in the figure. It can rotate in the B direction. Then, the movement control of the resin tank 90 and the rotation control of the mandrel 10 are tuned by a control device (not shown) so that a molded product having a predetermined shape made of the fiber reinforced composite material 100 is formed on the outer peripheral surface of the mandrel 10. . The composite material 100 wound around the outer peripheral surface of the mandrel 10 in this way is put into a heating furnace or the like together with the mandrel 10 to heat and cure the synthetic resin material, and then the mandrel 10 is decentered to form a molded product. As molded.

  Examples of the matrix constituting the fiber reinforced composite material 100 include thermosetting resin materials such as epoxy resins, unsaturated polyester resins, and vinyl ester resins, and thermoplastic resins such as nylon, polycarbonate, and thermoplastic polyimide. Materials etc. can be mentioned.

  Examples of the reinforcing fiber constituting the fiber-reinforced composite material 100 include glass fiber, carbon fiber, aramid fiber, boron fiber, and polyester fiber. Among these, CFRP using carbon fiber as a reinforcing material is particularly preferable from the viewpoint of high rigidity.

  In addition, as the composite material 100 wound around the mandrel 10, in addition to the roving material in which the reinforcing fiber is impregnated with the synthetic resin as described above, the sheet formed by impregnating the reinforcing fiber with the synthetic resin material is cut to form a fiber. It may be a prepreg made into a shape.

  The filament winding apparatus 1 according to the present embodiment includes an inner pressing device 20 provided inside the mandrel 10 and an outer pressing device 40 provided outside the mandrel 10, and a concave portion is formed on the molded product. 101 can be integrally formed.

  As shown in FIG. 2, the inner pressing device 20 includes a first inner pressing member 21 having a shape obtained by inverting the concave portion 101 to be molded into a convex shape, and the first inner pressing member 21 at the tip of the rod. And a first inner air cylinder 22 that is movably supported along the radial direction of the mandrel 10. On the outer peripheral surface of the mandrel 10, an opening 13 is formed at a position where the concave portion 101 is to be formed. The opening 13 has a size through which the first inner pressing member 21 can pass, and the inner pressing device 20 has a mandrel so that the first inner pressing member 21 is exposed from the opening 13. 10 is provided. The shape of the first inner pressing member 21 may be set in consideration of the amount of springback of the composite material 100 in addition to the shape of the concave portion 101 to be molded. Further, an anti-slip process such as a knurling process may be performed on the contact surface of the first inner pressing member 41 according to the properties of the composite material, the synthetic resin material, or the like.

  The first inner pressing member 21 is detachably attached to one end portion (rod tip portion) of the first inner air cylinder 22 by a technique such as bolt fastening. Therefore, one filament winding device can be obtained by appropriately replacing the first inner pressing member 21 with a different first inner pressing member in accordance with the specifications of the valve, piping, and the like disposed in the concave portion 101. 1 makes it possible to easily cope with concave portions of various shapes.

  The inner pressing device 20 includes a second inner pressing member 23 having a shape surrounding the outer periphery of the concave portion 101 to be molded, and the second inner pressing member 23 at the tip of the rod of the mandrel 10. And a second inner air cylinder 24 that is movably supported along the radial direction. The opening 13 of the mandrel 10 has a size that the second inner pressing member 23 cannot pass through, and when the second inner air cylinder 24 is extended, the tip of the second inner pressing member 23 is , Can contact the peripheral edge of the opening 13.

  The second inner pressing member 23 is a cylindrical body having a cross section surrounding the outer periphery of the concave portion 101. One end is open, while the other end is closed by the bottom surface. It has been. In the inner hole of the second inner pressing member 23, the first inner pressing member 21 and the first inner air cylinder 22 are provided so that the first inner pressing member 21 is positioned on one end side thereof. The other end portion of the first inner air cylinder 22 is fixed to the other end portion.

  Further, one end portion (rod tip portion) of the second inner air cylinder 24 is detachably attached to the bottom surface closing the other end portion of the second inner pressing member 23 by a method such as bolt fastening. The other end is fixed to the inner peripheral surface of the mandrel 10. In this way, the second inner pressing member 23 can be attached to and detached from the second inner air cylinder 24, so that the second inner pressing member can be adapted to the specifications of the valves and pipes disposed in the concave portion 101. 23 can be appropriately replaced with a second inner pressing member having a different shape, and the single filament winding apparatus 1 can easily cope with concave portions of various shapes.

  Further, as shown in FIGS. 2 and 3, the inner pressing device 20 is provided with an airbag 25 on the inner surface of one end portion of the second inner pressing member 23. The airbag 25 can be inflated by air supplied from an air supply device 50 (see FIG. 4) via a pipe 26. When the airbag 25 is inflated, the airbag 25 has a shape capable of pressing an inclined surface 41a located at the periphery of the first outer pressing portion 41, which will be described later. The inner pressing member 23 can be of a size that can pass through one end of the inner pressing member 23 (see reference numeral 25 'in FIG. 3). By pressing an inclined part or a step part located at the periphery of the concave part 101 to be molded by such an airbag 25, the shape of the concave part 101 can be molded with good accuracy. . Note that anti-slip processing such as knurling may be performed on the surface of the airbag 25 according to the properties of the composite material, the synthetic resin material, and the like.

  As shown in FIG. 2, the outer pressing device 40 includes a first outer pressing member 41 having a shape obtained by inverting the concave portion 101 to be molded into a convex shape, and the first outer pressing member 41 at the tip of the rod. And a first outer air cylinder 42 that is movably supported along the radial direction of the mandrel 10. The outer pressing device 40 is provided outside the mandrel 10 so that the first outer pressing member 41 faces the first inner pressing member 21 exposed from the opening 13 of the mandrel 10. The shape of the first outer pressing member 41 is substantially the same as that of the first inner pressing member 21 described above, and in addition to the shape of the concave portion 101 to be molded, the amount of springback of the composite material It may be set in consideration of the above. Further, an anti-slip process such as a knurling process may be performed on the contact surface of the first outer pressing member 41 according to the properties of the composite material, the synthetic resin material, or the like.

  The first outer pressing member 41 is detachably attached to one end portion (rod tip portion) of the first outer air cylinder 42 by a technique such as bolt fastening. Therefore, one filament winding apparatus 1 can be obtained by appropriately replacing the first outer pressing member 41 with a first outer pressing member having a different shape in accordance with the specifications of the valve, piping and the like disposed in the concave portion 101. Therefore, it is possible to easily cope with concave portions of various shapes.

  The outer pressing device 40 includes a second outer pressing member 43 having a shape surrounding the outer periphery of the concave portion 101 to be molded, and the mandrel 10 at the tip of the rod. And a second outer air cylinder 44 supported so as to be movable along the radial direction. Similar to the second inner pressing member 23 described above, the second outer pressing member 43 has such a size that it cannot pass through the opening 13 of the mandrel 10, and the second outer air cylinder 44 extends. Then, the distal end portion of the second outer pressing member 43 can come into contact with the peripheral edge of the opening portion 13.

  The second outer pressing member 43 is a cylindrical body having a cross-section surrounding the outer periphery of the concave portion 101, and one end is open while the other end is closed. Yes. In the inner hole of the second outer pressing member 43, the first outer pressing member 41 and the first outer air cylinder 42 are disposed so that the first outer pressing member 41 is positioned on one end side thereof. The other end of the first outer air cylinder 42 is fixed to the other end. Furthermore, one end portion (rod tip portion) of the second outer air cylinder 44 is detachably attached to the bottom surface closing the other end portion of the second outer pressing member 43 by a method such as bolt fastening. The other end is fixed to the frame 60. In this way, the second outer pressing member 43 can be attached to and detached from the second outer air cylinder 44, so that the second outer pressing member 43 can be adapted to the specifications of the valve, piping, etc. disposed in the concave portion 101. 43 can be appropriately replaced with a second outer pressing member having a different shape, so that one filament winding apparatus 1 can easily cope with concave portions of various shapes.

  As shown in FIG. 4, air is supplied from the air supply device 50 to the air cylinders 42 and 44 of the outer pressing device 40 configured as described above. On the other hand, the inner pressing device 20 is connected to the air supply device 50 via the rotary joint 12 in addition to the pipe so that it can rotate together with the mandrel 10.

  Furthermore, the filament winding apparatus 1 according to the present embodiment further includes a frame 60 (supporting means) that supports the outer pressing device 40 as shown in FIG.

  The frame 60 is rotatably supported by the gantry 70 on the same axis as the rotation shaft 11 of the mandrel 10. Further, a clutch 32 is interposed between the motor 30 and the mandrel 10, and when the clutch 32 is on, the frame 60 is rotated synchronously with the mandrel 10 by driving the motor 30, and when the clutch 32 is off, the motor Only the mandrel 10 is rotated by driving 30 and the frame 60 is not rotated.

  A lock mechanism 65 is interposed between the gantry 70 and the frame 60. As shown in FIG. 5, the lock mechanism 65 includes a lock member 66 provided on the gantry 70 side so as to be movable forward and backward with respect to an opening 61 formed in the frame 60. When the frame 60 is rotated in synchronization with the mandrel 10, the lock mechanism 66 is turned off without inserting the lock member 66 into the opening 61, and the frame 60 is brought into an unconstrained state with respect to the gantry 70. On the other hand, when the synchronous rotation is not performed, the lock member 66 is inserted into the opening 61, the lock mechanism 65 is turned on, and the frame 60 is fixed to the gantry 70.

  When the mandrel 10 and the frame 60 rotate synchronously, the first outer pressing member 41 supported by the frame 60 always faces the first inner pressing member 21 provided in the mandrel 10. Yes.

  Next, a method for forming a molded product using the filament winding apparatus 1 according to the present embodiment will be described.

  6A to 6E are diagrams illustrating a molding process by the filament winding apparatus according to the embodiment of the present invention, and FIG. 7 is a diagram illustrating another example of the drying step of the molding process in the embodiment of the present invention.

  First, as shown in FIG. 6A, the first inner air cylinder 22 of the inner pressing device 10 is extended so that the first inner pressing member 21 protrudes in a convex shape on the outer peripheral surface of the mandrel 10 through the opening 12. In this state, the composite material 100 is wound around the outer peripheral surface of the mandrel 10 while synchronizing the movement control of the resin tank 90 and the rotation control of the mandrel 10 to form the shape of the molded product.

  When the composite material 100 is wound around the outer peripheral surface of the mandrel 10, first, as shown in FIG. 6, the second outer air cylinder 44 of the outer pressing device 40 is extended, and the mandrel 10 is wound around as shown in FIG. 6B. The second outer pressing member 43 comes into contact with the composite material 100 thus pressed, and the second outer pressing member 43 presses the periphery of the convex portion 102 formed by the first inner pressing member 21.

  Next, as shown in the figure, the first outer air cylinder 42 of the outer pressing device 40 is extended, and the convex portion 102 raised by the first inner pressing member 21 is replaced with the first outer pressing member 41. Is pressed from the outside, and the convex portion 102 is sandwiched between the first inner pressing member 21 and the first outer member 41.

  As described above, the second outer pressing member 43 is pressed before the convex portion 102 is sandwiched between the first inner pressing member 21 and the first outer pressing member 41, so that the second outer pressing member 43 is pressed. The composite material 100 to be deformed can be fixed between the member 43 and the peripheral edge of the opening 13 of the mandrel 10, and the occurrence of wrinkles or wrinkles can be prevented when the convex portion 102 is deformed into a concave shape. It is possible.

  Next, as shown in FIG. 6C, the first inner air cylinder 22 is inserted into the mandrel 10 in a state where the convex portion 102 is sandwiched between the first inner pressing member 21 and the first outer pressing member 41. The first outer air cylinder 42 is moved radially inward of the mandrel 10 simultaneously with moving radially inward. Thus, the convex shape of the composite material 100 wound around the mandrel 10 is obtained by moving the first inner pressing member 21 and the first outer pressing member 41 in a synchronized state with the convex portion 102 sandwiched therebetween. The portion 102 is pressed toward the radially inner side of the mandrel 10 and deformed into a concave shape.

  When the first inner pressing member 21 and the first outer pressing member 41 move to the deepest part to form the concave portion 101, the first inner pressing member 21 and the first outer pressing member 21 as shown in FIG. The airbag 25 is inflated in a state where the concave portion 101 of the composite material is sandwiched between the pressing member 41. Thereby, the inclined surface located in the periphery of the recessed part 100 pinched | interposed between the 1st inner side pressing member 21 and the 1st outer side pressing member 41 is set with respect to the 1st outer side pressing member 41 by the airbag 25. Therefore, the concave portion 101 to be molded can be molded with good accuracy.

  Next, when the synthetic resin material constituting the composite material is a low-viscosity type or a slow-curing type, as shown in FIG. 6, the lock mechanism 65 is turned off and the clutch 32 is turned on, and the mandrel 10 and the frame 60 are turned on. The composite material is put into the heating furnace H together with the filament winding apparatus 1 in this state.

  Here, in the case of a composite material composed of a low-viscosity type or a slow-curing type synthetic resin material, the synthetic resin material flows even after being wound around the mandrel 10, and the deviation of the synthetic resin material (resin rich) in the molded product Layer) may occur. On the other hand, in the present embodiment, the composite material 100 is rotated during the curing of the synthetic resin material by rotating the mandrel 10 and the frame 60 synchronously while the composite material is cured in the heating furnace H. Therefore, it becomes difficult to form a resin rich layer on the molded product.

  In addition, when the synthetic resin material which comprises the composite material 100 is a high-viscosity type or a quick-curing type, since it is not necessary to rotate the composite material 100 during the hardening of the synthetic resin material, as shown in FIG. Only the mandrel 10 may be removed from the filament winding apparatus 1, and the mandrel 10 may be placed in the heating furnace H with the mandrel 10 mounted on the mandrel carriage D.

  When the composite material 100 wound around the outer peripheral surface of the mandrel 10 is cured, the filament winding apparatus 1 is taken out of the heating furnace H, and the airbag 25 of the inner pressing apparatus 20 is contracted as shown in FIG. The air cylinder 22 is contracted to move the first inner pressing member 21 away from the concave portion 101, and the second inner air cylinder 24 is contracted to connect the second inner pressing member 23 to the opening 13 of the mandrel 10. Move away from the periphery.

  Similarly, the first outer air cylinder 42 of the outer pressing device 40 is contracted to separate the first outer pressing member 41 from the concave portion 101, and the second outer air cylinder 44 is contracted to reduce the second. The outer pressing member 43 is moved away from the periphery of the opening 13 of the mandrel 10.

  After the first inner pressing member 21 and the first outer pressing member 41 are moved away from each other and the concave portion 101 of the composite material 100 is released, the mandrel 10 is decentered from the composite material 100 to form a molded product. Is completed.

  As described above, in the filament winding apparatus and the molding method using the filament winding apparatus according to this embodiment, the position where the concave portion 101 is to be molded on the outer peripheral surface of the mandrel 10 is raised in advance by the inner pressing device 20. In addition, after the composite material 100 is wound around the mandrel 10, the convex portion 102 formed on the composite material 100 is deformed so as to be reversed into a concave shape, thereby forming a concave shape on the molded article composed of the composite material 100. The part 101 can be integrally formed.

  The embodiment described above is described for facilitating the understanding of the present invention, and is not described for limiting the present invention. Therefore, each element disclosed in the above embodiment is intended to include all design changes and equivalents belonging to the technical scope of the present invention.

  For example, a plurality of openings 13 are formed in the mandrel 10, a plurality of inner pressing devices 20 are disposed therein, and a plurality of outer pressing devices 40 are disposed outside the mandrel 10 so as to face the inner pressing devices 20, respectively. It is also possible to provide a single piece, whereby two or more concave portions 101 can be integrally formed in a cylindrical or tubular molded product.

FIG. 1 is a schematic perspective view showing an entire filament winding apparatus according to an embodiment of the present invention. FIG. 2 is a schematic cross-sectional view of the mandrel and each pressing device in the embodiment of the present invention. FIG. 3 is an enlarged view of a portion III in FIG. FIG. 4 is an air piping diagram of the filament winding apparatus according to the embodiment of the present invention. FIG. 5 is a cross-sectional view showing the locking mechanism in the embodiment of the present invention. FIG. 6A is a schematic cross-sectional view showing a winding step of a forming process by the filament winding apparatus according to the embodiment of the present invention. FIG. 6B is a schematic cross-sectional view showing a sandwiching step of a forming process by the filament winding apparatus according to the embodiment of the present invention. FIG. 6C is a schematic cross-sectional view showing a deformation step of the forming process by the filament winding apparatus according to the embodiment of the present invention. FIG. 6D is a diagram illustrating a drying step of a forming process by the filament winding apparatus according to the embodiment of the present invention. FIG. 6E is a schematic cross-sectional view showing an opening step of the forming process by the filament winding apparatus according to the embodiment of the present invention. FIG. 7 is a diagram showing another example of the drying step of the molding process in the embodiment of the present invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Filament winding apparatus 10 ... Mandrel 11 ... Rotating shaft 12 ... Rotary joint 13 ... Opening part 20 ... Inner side pressing device 21 ... 1st inner side pressing member 22 ... 1st inner side air cylinder 23 ... 2nd inner side pressing member 24 2nd inner air cylinder 25 ... Air bag 26 ... Piping 30 ... Motor 31 ... Belt 32 ... Clutch 33 ... Support member 40 ... Outer pressing device 41 ... First outer pressing member 41a ... Inclined surface 42 ... First outer side Air cylinder 43 ... second outer pressing member 44 ... second outer air cylinder 50 ... air supply device 60 ... frame 61 ... opening 65 ... lock mechanism 66 ... lock member 70 ... stand 80 ... creel 90 ... resin tank 100 ... composite Material 101 ... Concave part 102 ... Convex part H ... Heating furnace D ... Mandrel cart

Claims (15)

A mandrel supported for rotation;
A supply means capable of supplying a composite material to the mandrel,
A filament winding apparatus for forming a molded product by winding the composite material supplied from the supply means around the rotating mandrel,
An inner pressing means having a shape corresponding to the shape of the concave portion to be formed and having a first inner pressing portion movable along the radial direction of the mandrel;
An outer pressing means having a shape corresponding to the shape of the concave portion to be molded and having a first outer pressing portion movable along a radial direction of the mandrel;
The inner pressing means is provided inside the mandrel so as to expose the first inner pressing portion to the outside through an opening formed on an outer peripheral surface of the mandrel.
The outer pressing means is a filament winding apparatus provided outside the mandrel so that the first outer pressing portion faces the first inner pressing portion.   2. The filament winding apparatus according to claim 1, wherein each of the first inner pressing portion and the first outer pressing portion has a shape obtained by inverting the concave portion to be formed into a convex shape.   The said outer side press means has a shape which surrounds the outer periphery of the said recessed part which should be shape | molded, and further has a 2nd outer side press part which can move along the radial direction of the said mandrel. Filament winding device.   The filament winding apparatus according to any one of claims 1 to 3, wherein the inner pressing means further includes a peripheral pressing portion capable of pressing a peripheral edge of the first outer pressing portion.   The filament winding apparatus according to claim 4, wherein the peripheral pressing portion presses a peripheral edge of the first outer pressing portion by expanding. The inner pressing means further includes a first inner support portion that supports the first inner pressing portion so as to be movable along a radial direction of the mandrel,
The outer pressing means further includes a first outer support portion that supports the first outer pressing portion movably along the radial direction of the mandrel,
The first inner pressing portion is detachable from the first inner support portion,
The filament winding apparatus according to any one of claims 1 to 5, wherein the first outer pressing portion is detachable from the first outer support portion. The outer pressing means further includes a second outer support portion that supports the second outer pressing portion so as to be movable along the radial direction of the mandrel,
The filament winding apparatus according to any one of claims 3 to 6, wherein the second outer pressing portion is detachable from the second outer support portion. And further comprising support means for supporting the outer pressing means,
The filament winding apparatus according to any one of claims 1 to 7, wherein the support means is rotatable in synchronization with the mandrel.   A molded product molded using the filament winding apparatus according to claim 1. A method of forming a molded product by winding a composite material around a rotating mandrel,
A winding step of winding the composite material in a state in which the position where the concave portion should be formed on the outer peripheral surface of the mandrel is raised in a convex shape;
A molding method comprising: a deforming step of pressing a convex portion of the composite material wound around the mandrel toward a radially inner side of the mandrel to deform into a concave shape. A method of forming a molded product by winding a composite material around a rotating mandrel,
A winding step of winding the composite material around the mandrel in a state where the first inner pressing portion having a shape corresponding to the shape of the concave portion to be formed is protruded from the opening formed on the outer peripheral surface of the mandrel. When,
The first inner pressing portion and the first outer pressing portion are brought into contact with the composite material wound around the mandrel by contacting a first outer pressing portion having a shape corresponding to the concave portion to be molded. A sandwiching step of sandwiching the composite material between
The composite wound around the mandrel by moving the first inner pressing part and the first outer pressing part synchronously toward the radially inner side of the mandrel while sandwiching the composite material A deformation step of pressing the convex portion of the material toward the radially inner side of the mandrel to deform it into a concave shape;
A mold release step of releasing the composite material by moving the first inner pressing part and the first outer pressing part in a separating direction.   The molding method for a molded product according to claim 11, wherein the first inner pressing portion and the first outer pressing portion each have a shape obtained by inverting the concave portion to be molded into a convex shape.   In the sandwiching step, after bringing the second outer pressing portion having a shape surrounding the outer periphery of the concave portion to be molded into contact with the composite material wound around the mandrel, The method for molding a molded product according to claim 11 or 12, wherein the first outer pressing portion is brought into contact.   In the deformation step, the first outer pressing portion and the first outer pressing portion are moved toward the radially inner side of the mandrel with the composite material sandwiched therebetween, and then the first outer pressing portion. The method for forming a molded product according to claim 11, wherein the periphery of the pressing portion is pressed. The drying step of drying the composite material while rotating the mandrel in a state where the composite material is sandwiched between the first inner pressing portion and the first outer pressing portion. The molding method of the molded product in any one of -14.

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