Device and method for manufacturing drawn article

Abstract

The purpose of the present invention is to provide a method and device for increasing the yield by making it easier to draw in a material to be processed in a conventional manufacturing device provided with a wrinkle removal plate. Disclosed in the present specification is a manufacturing device for molding a material to be processed into a drawn article having a desired shape by press molding using a pair of upper and lower molds comprising a first mold having a cavity and a second mold having a core, the manufacturing device comprising: a wrinkle removing plate for removing wrinkles on the first mold and the second mold; the wrinkle removing plate is arranged on the periphery perpendicular to the surface, in contact with the processed material, of the mold core; and at least one separator, which is disposed above the wrinkle removal plate, and which is made of a fiber-reinforced resin.

Description

Technical Field

[0001] The present invention relates to a manufacturing device and a manufacturing method for a drawn product in which a workpiece is formed into a desired shape by press molding. Background Art

[0002] In the drawing process using a press machine, a pair of upper and lower dies consisting of a first die (also called a concave die or a die) having a cavity and a second die (convex die) having a core (or a punch) is generally used.

[0003] In addition to conventional press forming using a metal plate as a workpiece (blank or workpiece), drawing is also widely used in press forming using a fiber reinforced composite resin (so-called FRP) as a workpiece.

[0004] When the material to be processed is a fiber-reinforced composite resin or a composite of the fiber-reinforced composite resin and metal, a semi-cured intermediate material (prepreg) is usually formed by pre-impregnating a reinforcing fiber material such as glass fiber or carbon fiber with a thermosetting resin such as epoxy resin, phenolic resin, polyester resin, or impregnating a reinforcing fiber material such as glass fiber or carbon fiber with a thermoplastic resin. The prepreg is heated and pressurized by a molding machine to produce the desired processed product.

[0005] In the drawing process of a fiber-reinforced composite resin using a molding press, as the core enters the cavity, the reinforcing fiber material is drawn into the drawing space (the gap between the cavity and the core).

[0006] This pull-in is obvious at the corners of the processed product, which causes the reinforcing fiber material to produce local amorphous tensile strain and interval expansion, and the density of the reinforcing fiber material changes, causing the resin to be biased, causing wrinkles on the side walls of the processed product, and in some cases, the fiber may break. This causes local deviations in the strength of the processed product, resulting in a decrease in the overall strength, and other unfavorable conditions, which deteriorate the quality of the molded product and cause defective products.

[0007] In order to avoid the above-mentioned undesirable situation, a workpiece holding fixture called a "wrinkle-removing plate" has been used in the past. The wrinkle-removing plate is a frame-shaped plate (a picture frame-shaped plate) surrounding the outer edge of the workpiece (hereinafter, it is assumed to be a prepreg), and also has the function of a blank support member that holds the workpiece at a predetermined position of the mold.

[0008] Figure 7 This is a schematic diagram illustrating an example of a known drawing machine. Figure 7 (a) is a side view of a drawing machine consisting of a first mold having a cavity 1 and a second mold having a core 2. Figure 7 (b) Yes Figure 7(a) The first mold and the workpiece are removed, and the main part of the second mold is viewed from above.

[0009] This drawing machine is composed of a pair of dies as described above. The core 2 provided in the second die 200 rises and enters the cavity 1 provided in the first die 100 to perform drawing on the prepreg as the workpiece 4 .

[0010] Also, a wrinkle removal plate 3 is provided in a manner of surrounding the outer circumference of the core 2 of the second mold 200 .

[0011] Figure 7 The drawing machine of the shown form is fixed on a machine base (base of a molding machine) 7, the second mold 200 rises relative to the first mold 100, and the core 2 of the second mold 200 is pressed into the cavity 1 of the first mold 100. In addition, there is also a form in which a pair of molds are turned upside down.

[0012] like Figure 7 As shown in the top view of (b), the wrinkle-removing plate 3 is composed of a frame-like plate body and is arranged so as to be able to rise and fall around the outer edge of the core 2 set in the second mold 200. The wrinkle-removing plate 3 is usually composed of a metal plate of the same system as the mold.

[0013] During the drawing process, the material to be processed (e.g. prepreg) 4 is placed on the wrinkle removal plate 3. Figure 7 The wrinkle removal plate 3 is raised and lowered by the telescopic member 5 before or at the same time as the second mold 200 starts to rise, thereby clamping the workpiece 4 between the lower surface of the first mold 100 and the upper surface (facing surface) of the second mold 200.

[0014] Next, the second mold 200 is further raised in the direction of the large arrow by the pressurizing mechanism 6 , and the core 2 is pressed into the cavity 1 , thereby drawing the workpiece 4 into a predetermined shape.

[0015] The wrinkle removal plate 3 is a device for holding and positioning the processed material 4, but in the drawing process, its main function is to make the structure of the peripheral part of the processed material produced in the drawing process of the processed material appropriately move between the cavity and the core, mainly to avoid wrinkles on the side wall or breakage due to thickness reduction.

[0016] As documents disclosing the prior art related to such wrinkle-removing plates, there are a large number of general documents in addition to patent documents such as Patent Document 1 and Patent Document 2.

[0017] Patent Document 1 discloses a press molding apparatus and method for a fiber reinforced composite molded product, which uses an upper mold having a concave portion (cavity) and a lower mold having a convex portion (core), and is provided with a wrinkle removal plate disposed on the outer periphery of the lower mold.

[0018] In addition, Patent Document 2 discloses a general molding machine having a concave mold (equivalent to the above-mentioned upper mold called a die), a convex mold (equivalent to the above-mentioned lower mold called a punch), and a wrinkle removal plate, and a method and device for avoiding wrinkles and breakages in the molded product during the drawing process of the sheet material by injecting high-pressure liquid into the above-mentioned mold.

[0019] (Prior art literature)

[0020] (Patent Document)

[0021] (Patent Document 1) Japanese Patent No. 6587771

[0022] (Patent Document 2) Japanese Patent Application Laid-Open No. 07-144234 Summary of the invention

[0023] Technical issues to be solved

[0024] In the deep drawing process, the deep drawing part of the concave shape part (cavity) and the convex shape part (core) at the corner is particularly prone to the deep drawing of the reinforcing fiber, which causes the deviation and cutting between the fibers, the film thickness reduction of the resin layer, etc. If only the wrinkle removal plate (also called anti-wrinkle plate) is used in the deep drawing machine, it may be caught between the wrinkle removal plate and the upper mold, thereby hindering the deep drawing of the workpiece and failing to obtain a high-precision processed product.

[0025] The main function of the wrinkle removal plate is to avoid excessive drawing of the constituent materials of the above-mentioned processed materials and to achieve appropriate drawing.

[0026] An object of the present invention is to provide a method for making it easier to draw in a workpiece in the above-mentioned conventional manufacturing apparatus equipped with a wrinkle removing plate.

[0027] Solutions to the problem

[0028] In order to achieve the above-mentioned object, the manufacturing apparatus and the manufacturing method of the drawn product of the present invention are characterized by using at least one spacer disposed above the wrinkle removing plate.

[0029] A representative structure of the present invention is as follows.

[0030] The wrinkle removal plate 3 involved in the present invention is used in a molding machine that molds the processed material 4 into a deep-drawn product of a desired shape through molding. The molding uses a pair of upper and lower molds consisting of a first mold 100 with a cavity 1 and a second mold 200 with a core 2. The present invention adopts the following structure.

[0031] [1] A manufacturing device that forms a workpiece into a drawn product of a desired shape by press molding, wherein a pair of upper and lower molds consisting of a first mold having a cavity and a second mold having a core are used in the press molding, wherein:

[0032] The manufacturing device comprises:

[0033] a wrinkle removal plate disposed around a surface of the core that is perpendicular to the surface in contact with the workpiece; and at least one spacer disposed above the wrinkle removal plate.

[0034] The spacer is made of fiber-reinforced resin.

[0035] [2] The present invention provides a manufacturing method for a deep-drawn product using a manufacturing device for a deep-drawn product that uses a pair of upper and lower molds consisting of a first mold having a cavity and a second mold having a core to form a workpiece into a desired shape by stamping.

[0036] The manufacturing device comprises:

[0037] a wrinkle removal plate disposed around a surface perpendicular to a surface where the core contacts the workpiece; and at least one spacer disposed on the wrinkle removal plate.

[0038] The manufacturing method:

[0039] The process of placing the processed material on the wrinkle removal plate;

[0040] The step of raising the second mold together with the wrinkle removal plate so that the contact surface between the core and the workpiece material contacts the workpiece material;

[0041] While drawing the workpiece between the core and the cavity, the second die is further raised to pressurize the workpiece, and the second die is lowered to obtain a drawn product.

[0042] The spacer is made of fiber-reinforced resin.

[0043] [3] The manufacturing method according to [2], wherein the processed material is a fiber-reinforced composite resin containing at least one resin selected from the group consisting of thermoplastic resins and thermosetting resins, or the processed material is a composite material of a fiber-reinforced resin containing at least one resin selected from the group consisting of thermoplastic resins and thermosetting resins and a metal selected from aluminum, high-strength steel and titanium.

[0044] [4] The manufacturing method according to [3], wherein the processed material is a laminated body.

[0045] [5] The manufacturing method according to [2], wherein the wrinkle removal plate is composed of a plurality of wrinkle removal plate pieces arranged outside the core, and each of the wrinkle removal plate pieces has a pair of arms extending at right angles to each other.

[0046] [6] The manufacturing method according to any one of [2] to [5], wherein the thickness of the separator is the same as or greater than the thickness of the material to be processed.

[0047] The present invention is not limited to the above-mentioned structure and the structures of the examples described in the embodiments described below, and various modifications are possible as long as they do not depart from the technical concept of the present invention.

[0048] Effects of the Invention

[0049] According to the configurations of [1] and [2], by providing the wrinkle-removing plate, the occurrence of wrinkles or breakage (notches or cracks in the molded product) can be suppressed by avoiding the offset and cutting between fibers and the reduction in the film thickness of the resin layer caused by the wrinkle-removing plate. Furthermore, by using the spacer, it is possible to prevent excessive clamping between the wrinkle-removing plate and the upper mold, making it easier to pull in the workpiece.

[0050] In addition, if the spacer is made of metal as in the past, it will expand during hot pressing, making it difficult to control the thickness of the spacer. In other words, it is difficult to accurately adjust the ease of drawing in the thickness. On the other hand, if the spacer is made of fiber-reinforced resin such as carbon fiber-reinforced resin as in the present invention, it is possible to manufacture a deep-drawn product with a low thermal expansion coefficient and extremely high accuracy in thickness.

[0051] In addition, in the present invention, since the molding is performed under heating, even if the molding is repeated under heating, the deformation of the separator itself is extremely small, and the high dimensional accuracy of the obtained drawn product is maintained, which has the characteristic of improving the yield.

[0052] The above-mentioned structures [1] and [2] are particularly useful for the above-mentioned processed material [3] (thermoplastic resin, thermosetting resin, fiber-reinforced composite resin containing thermoplastic resin or thermosetting resin, or composite material of these resins and metal selected from aluminum, high-strength steel and titanium). These materials are easily formed into a wavy shape during press working, and once the wavy shape is formed, it is difficult to pull the material into the cavity and the core. However, if it is the present structure, the formation of the wavy shape can be suppressed, making it easier to pull the material into.

[0053] The structures of [1] and [2] are useful for the laminated body described in [4]. In the case of a laminated body, for example, if fiber-reinforced composite resin prepregs are stacked, the material to be processed becomes thicker and difficult to pull in due to the stacking. However, by providing a spacer, the ease of pulling in can be improved, so that even a laminated body can be manufactured as a high-precision deep-drawn product.

[0054] In the structures of [1] and [2] above, by adopting the wrinkle-removing plate of [5] above, it is possible to manufacture the wrinkle-removing plate at low cost and suppress excessive drawing of the processed material. For example, when the non-processed material is metal, the corner can be formed into a shape by thinning the portion due to ductility, but since the metal of the reduced portion moves to other portions, the metal plate forms a wave shape due to the increased metal. As a result, the wave-shaped material (material with unevenness) is not drawn into the mold. Therefore, when the processed material is metal, it is preferred to place the wrinkle-removing plate around (360°) so that the processed product does not have unevenness. On the other hand, in the case of fiber-reinforced composite resin (CFRP), since the corner is formed by evenly gathering fibers, it is limited to the range of the portion forming the corner, and the portion other than this rarely forms a wave shape, so it is not necessary to place the wrinkle-removing plate all around. On the contrary, when the wrinkle-removing plate is arranged only at four points near the corner, the processed object will not be excessively squeezed, and a fiber-reinforced composite molded product with high precision can be easily obtained.

[0055] Furthermore, according to the configuration of (6) above, the workpiece in the portion in contact with the wrinkle removing plate is not subjected to pressure from the first die, so it is easier to pull in the workpiece, and thick workpieces can be handled. BRIEF DESCRIPTION OF THE DRAWINGS

[0056] Figure 1 It is a schematic diagram of a manufacturing device using the wrinkle-removing plate 3 and the spacer 8 in Example 1.

[0057] Figure 2 This is a schematic diagram showing a state in which a workpiece 4 is arranged on a wrinkle-removing plate 3 in the manufacturing apparatus of Example 1.

[0058] Figure 3This is a schematic diagram showing that in the manufacturing apparatus of Example 1, the second die comes into contact with the workpiece 4 and begins to deform.

[0059] Figure 4 This is a schematic diagram showing a state in which the first mold and the second mold are closest to the workpiece 4 in the manufacturing apparatus of Example 1 and are heated and pressurized in a state of a predetermined shape.

[0060] Figure 5 This is a schematic diagram showing a state in which the second die is lowered in the manufacturing apparatus of Example 1 to obtain a drawn product.

[0061] Figure 6 It is a schematic diagram of the manufacturing apparatus of Example 2 in which wrinkle-removing plates 3 are provided in the form of wrinkle-removing plate pieces on the outside of the four corners of the core.

[0062] Figure 7 This is a schematic diagram of a conventional manufacturing apparatus in which no separator is provided.

[0063] (Explanation of Reference Numerals)

[0064] 1 Cavity

[0065] 2 Core

[0066] 3 wrinkle removal panels

[0067] 31, 32, 33, 34 wrinkle removal panels

[0068] 4 Processed materials

[0069] 5 Telescopic parts

[0070] 6 Pressurizing mechanism

[0071] 7 Base

[0072] 8 Isolation

[0073] 100 First Mold

[0074] 200 Second mold DETAILED DESCRIPTION

[0075] Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings of the embodiments.

[0076] Example

[0077] Example 1

[0078] Figure 1 1 is a schematic diagram of a manufacturing device (drawing machine) for a drawn product of a wrinkle-removing plate embodiment 1 suitable for use in a embossing machine according to the present invention. Figure 1(a) is a side view of a drawing machine composed of a first mold having a cavity 1 and a second mold having a core 2.

[0079] Figure 1 (b) Figure 1 (a) The first mold and the workpiece are removed and the main part of the second mold is viewed from above.

[0080] The deep drawing machine Figure 7 The same as described in , it is composed of a pair of molds, and the core 2 set in the second mold 200 rises and enters the cavity 1 set in the first mold 100 to perform deep drawing on the laminated body of the prepreg as the workpiece 4.

[0081] In this embodiment, a rectangular wrinkle removal plate 3 is arranged on the outer periphery of the core 2 of the second mold 200 , and four rectangular spacers 8 are provided on the rectangular wrinkle removal plate 3 along the straight line portion of the outer periphery of the rectangular wrinkle removal plate 3 .

[0082] (Wrinkle removal board)

[0083] The wrinkle removal plate 3 is provided on the second mold 200 so as to be movable upward and downward together with the second mold 200. The wrinkle removal plate 3 is connected to the second mold 200 via a telescopic member 5 formed of a spring mechanism.

[0084] Before the second die 200 starts to rise, the workpiece 4 is placed on the surface of the wrinkle removal plate 3, and the second die 200 is raised to perform the drawing process.

[0085] Therefore, the wrinkle removal plate 3 has a flat surface on which the workpiece 4 can be placed, and has a hole near the center of the flat surface through which the core 2 of the second mold 200 can gradually rise.

[0086] (Isolator)

[0087] In the drawing machine of Example 1, spacers 8 are provided on the plane of the wrinkle-removing plate 3 where the workpiece 4 can be placed. The spacers 8 are arranged above the wrinkle-removing plate 3 along the outer edge of the wrinkle-removing plate 3, and four rectangular spacers 8 are provided on each side. In addition, the position of the spacers is not particularly limited as long as it is on the plane of the wrinkle-removing plate 3, and can be changed according to the size and shape of the workpiece 4. It can also be implemented by moving during molding.

[0088] In Example 1, the spacer used is made of fiber-reinforced resin of carbon fiber of epoxy resin.

[0089] In addition, the fiber-reinforced resin of the spacer is not limited to the carbon fiber-reinforced resin of epoxy resin, and the resin may use a resin composition comprising one of a thermosetting resin and a thermoplastic resin. As thermosetting resins, epoxy resins, vinyl ester resins, unsaturated polyester resins, polyurethane resins, phenolic resins, etc. can be cited, and these can also be used in combination. As thermoplastic resins, acrylic resins, polyester resins, polycarbonate resins, polypropylene resins, polyethylene resins, polystyrene resins, vinyl chloride resins, polyamide resins, etc. can be cited. These can be used alone or in combination.

[0090] In the case of a thermoplastic resin having a low melting point, it may melt due to a high heating temperature. In this case, a suitable resin may be selected. However, from this point of view, a thermosetting resin has a feature that it is easier to handle than a thermoplastic resin.

[0091] The fibers of the fiber-reinforced resin may be long fibers or short fibers, and the material may be any one of carbon fibers, glass fibers, and metal fibers, or a combination thereof may be used.

[0092] As the fiber base material in the fiber reinforced resin, a carbon fiber material having a thickness of 0.03 mm to 0.5 mm is preferred, but not limited thereto. As the carbon fiber, PAN-based carbon fiber using polyacrylonitrile as a raw material and asphalt-based carbon fiber using asphalt as a raw material can be used. As the carbon fiber in the prepreg constituting the prepreg 1, carbon fiber is preferred, but not limited thereto.

[0093] The spacer can be used by stacking commercially available fiber-reinforced resin prepregs, cutting them into a predetermined shape, and then curing them.

[0094] Alternatively, the spacer may be a base material such as metal or resin, or a composite material obtained by placing a fiber-reinforced resin around the base material and then curing the resin.

[0095] (Processing material)

[0096] The material (material of the processed material 4) that can be drawn by the drawing machine of Example 1 is not particularly limited. In addition to metal single substances such as plate-shaped iron, aluminum, high-strength steel, and titanium, fiber-reinforced composite resins, thermoplastic resins, thermosetting resins, and composite materials of these resins and metals (aluminum, high-strength steel, and titanium) can also be cited. Materials formed by stacking these materials can also be drawn. In addition, prepregs can be used as materials for fiber-reinforced composite resins, thermoplastic resins, thermosetting resins, and composite materials. Prepregs are easy to handle and are therefore preferred.

[0097] Examples of the fibers of the fiber-reinforced composite resin include glass fibers, carbon fibers, and organic fibers.

[0098] (Manufacturing method of drawn product)

[0099] The drawing method using the drawing machine of Example 1 is described. In this example, a laminate of prepreg of carbon fiber reinforced composite resin (thermosetting resin) is used as the workpiece 4. Figure 1 As in (a), the workpiece 4 is placed on the wrinkle removing plate 3 so as not to contact the separator 8. Then, the workpiece 4 is heated by a heater (not shown) provided inside or outside the second die 200.

[0100] After the workpiece 4 is heated to a predetermined temperature, the second mold 200 and the wrinkle removal plate 3 provided therein are raised until the spacer 8 contacts the first mold 100 (upper mold) (see Figure 2 ). At this time, the workpiece 4 may contact the first mold 100 together with the spacer 8, or the workpiece 4 may not contact the first mold 100. In order to prevent the workpiece 4 from contacting the first mold 100, the height of the spacer 8 is set higher than the height of the workpiece 4. From the viewpoint of making it easy to pull the workpiece 4 into the cavity 1, it is preferred that the workpiece 4 does not contact the first mold 100 at this time.

[0101] After the spacer 8 contacts the first mold 100, the second mold 200 with the core 2 rises further. At this time, the telescopic member 5 contracts, the wrinkle removal plate 3 and the spacer 8 maintain the position, and only the second mold 200 (core 2) rises further, pulling the workpiece 4 between the cavity 1 and the core 2, and further rising while deforming the workpiece 4 (refer to Figure 3 ).

[0102] When the core 2 enters the cavity 1, the first mold stops rising at a predetermined position while pressurizing the workpiece 4. Heating is continued at the position where the rise stops, and pressurization and heating are continued to form the desired shape. The second mold 200 stops for a period of 10 seconds to 20 minutes.

[0103] After necessary pressurization and heating are performed, heating is stopped, and after cooling to a predetermined temperature, the second die 200 is lowered to remove the drawn product.

[0104] Example 2

[0105] Figure 6The second embodiment shown is another aspect of the present invention. The first embodiment relates to a wrinkle-removing plate 3 having a rectangular surface with a hole in the center for inserting the core 2. However, in the second embodiment, the wrinkle-removing plate is composed of wrinkle-removing plate pieces 31, 32, 33, 34, and the wrinkle-removing plate pieces 31, 32, 33, 34 are arranged when the core 2 is viewed from above (refer to Figure 6 (b)) The outer sides of the four corners 30 of the substantially rectangular shape. In addition, the finishing work for obtaining the predetermined manufacturing accuracy of the wrinkle removing panels 31, 32, 33, 34 is reduced, and the overall cost can be reduced.

[0106] In addition, the present invention is more effective in the case of a relatively large mold. For example, one side (one of the four sides) of the core from corner to corner is preferably greater than 1000 mm, more preferably greater than 1500 mm, and further preferably greater than 2000 mm.

[0107] Even when the wrinkle-removing plate is a plurality of such wrinkle-removing plate pieces, by providing the spacer 8 above the upper plane of each wrinkle-removing plate piece 31, 32, 33, 34, the workpiece 4 can be easily pulled in as in the first embodiment. Figure 6 In the figure, the spacer 8 is in an L-shape, but the shape of the spacer 8 is not particularly limited, and a rectangular parallelepiped or a rectangular parallelepiped bent into a curved shape may be used.

[0108] Furthermore, the core 2 adopts a roughly rectangular core with an upper plane having curved corners, but is not limited to a roughly rectangular core. The present invention can also be applied to circular, elliptical, etc. shapes. In this case, a plurality of wrinkle-removing plates can be provided around the core (with isolation members on the wrinkle-removing plates).

Claims

1. A deep-drawn product manufacturing device, characterized in that: The material to be processed is formed into a drawn product of a desired shape by compression molding, wherein a pair of upper and lower molds consisting of a first mold having a cavity and a second mold having a core are used in the compression molding, wherein: The manufacturing device comprises: a wrinkle removal plate disposed around a surface of the core that is perpendicular to the surface in contact with the workpiece; and at least one spacer disposed above the wrinkle removal plate. The spacer is made of fiber-reinforced resin.

2. A manufacturing method for manufacturing a drawn product based on a manufacturing device for a drawn product that forms a workpiece into a desired shape by die-pressing, wherein a pair of upper and lower dies consisting of a first die having a cavity and a second die having a core are used in the die-pressing, wherein: The manufacturing device comprises: a wrinkle removal plate disposed around a surface of the core that is perpendicular to the surface in contact with the workpiece; and at least one spacer disposed above the wrinkle removal plate. The manufacturing method comprises: The step of placing the processed material above the wrinkle removing plate; The step of raising the second mold and the wrinkle removal plate together and bringing the surface of the core in contact with the workpiece into contact with the workpiece; The process of further raising the second die to pressurize the material to be processed while drawing the material to be processed between the core and the cavity; and the process of lowering the second die to obtain a drawn product. The spacer is made of fiber-reinforced resin.

3. The manufacturing method according to claim 2, wherein: The processed material is a fiber-reinforced composite resin containing at least one resin selected from the group consisting of thermoplastic resins and thermosetting resins, or a composite material of a fiber-reinforced resin containing at least one resin selected from the group consisting of thermoplastic resins and thermosetting resins and a metal selected from aluminum, high-strength steel and titanium.

4. The manufacturing method according to claim 3, wherein: The processed material is a laminated body.

5. The manufacturing method according to claim 2, wherein: The wrinkle removal plate is composed of a plurality of wrinkle removal plate pieces arranged outside the core, and each of the wrinkle removal plate pieces has a pair of arms, one of which extends at a right angle to the other.

6. The manufacturing method according to claim 2, wherein: The thickness of the isolation member is the same as or greater than the thickness of the processed material.

7. The manufacturing method according to any one of claims 2 to 6, wherein: In the fiber-reinforced resin of the separator, the fiber is made of carbon and the resin is made of epoxy resin.

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