JP4652160B2 - Lamination composite straightening jig, straightening method, and molded product - Google Patents

Description

  In the present invention, when a laminated composite material shaped so as to have an L-shaped or C-shaped cross section is heated and cured through pressurization through a pressure bag, on the male jig for the curing process. A jig that is placed on the laminated composite material after shaping and maintains the plate thickness of the laminated composite material even after curing, a plate thickness correcting method using the jig, and the method corrected by the method It relates to molded products.

  For example, a composite sheet is laminated while shaping on a mold jig to obtain a shaped product having a corner R portion such as L-shaped and C-shaped cross sections, and then heat-cured to obtain a molded product. When obtained, the plate thickness when the composite sheets are laminated (that is, the plate thickness at the time of lamination) is larger than the plate thickness after curing (that is, the plate thickness after curing). This is because the matrix resin does not have much fluidity when laminated, so the composite sheets cannot be completely adhered to each other, and in many cases, air is entrained, and the resin itself shrinks in volume when cured. is there. This reduction in plate thickness is generally referred to as “blowing” (see, for example, Patent Document 1).

  As shown in FIG. 1 (a), for example, during lamination, when the laminated composite material 2 having an L-shaped cross section bent along the corner R portion of the male jig 1 is cured in this state, FIG. As shown to (b), the corner R part 200 of the laminated composite material 2 forms the part which swells like it was picked from the outside. This is a molding defect called “R portion is picked”.

  When the R portion is picked, the outer peripheral arc length of the corner R portion 200 becomes geometrically smaller as the thickness of the laminated composite material 2 at the time of lamination (before curing) becomes smaller after the curing. (A circumferential length difference occurs.) However, since the actual outer circumferential arc and the reinforcing fiber in the vicinity of the inner circumference cannot be contracted by this geometric circumferential difference, the remainder of the fiber length of the circumferential difference protrudes to the outside. This occurs because of

  The remainder of the fiber length is more conspicuous as the plate thickness is larger and / or the corner R portion 200 is smaller. When this is significant, the remainder of the fiber is easily bent. This bending is a molding defect called wrinkle 201, and often coincides with the above-mentioned “R portion is picked”.

  Similarly, when the female jig 1B is used, the laminated composite material 2 having an L-shaped cross section bent along the corner R portion of the female jig 1B as shown in FIG. When the curing process is performed, as shown in FIG. 2 (b), the fibers of the circumferential length difference between before and after the curing of the inner arc length of the corner R portion 200B of the laminated composite material 2 are insufficient at the inner circumferential arc and the vicinity thereof. To do. Depending on the degree of the bridge 202, a cavity 203 may be generated inside the bridge 202 (see, for example, Patent Document 1).

  In order to prevent the occurrence of such molding defects, a design in which the radius of the corner R portion is increased is recommended. However, this increases the size of the molded product, and thus the product using this molded product as a part ( For example, the degree of freedom of design of aircraft) is taken away. Also, a design that allows a certain degree of molding failure is possible. However, in many L-shaped and C-shaped materials, the waist bending at the corner R portion is a fracture orientation, and therefore, the test for allowing a molding defect becomes enormous. Furthermore, since the waist bending of the corner R portion becomes a strong bottleneck, the overall plate thickness increases, causing an increase in cost and weight.

  Another method for reducing such molding defects is, for example, the use of a curl plate 3 as shown in FIGS. 3 (a) and 3 (b). The curl plate 3 is generally a thick plate L-shaped member made of steel and generally has a uniform thickness. The curl plate 3 is a surface opposite to the surface (that is, the mold surface) 205a of the laminated composite material 2 that is in contact with the male jig 1 (that is, pressurization as a film capable of sealing the laminated composite material 2). This is the surface against which the bag abuts and is referred to as the bag surface) 205b.

  The curl plate 3 has the original action of bringing the inner surface into close contact with the bag surface 205b and smoothing the bag surface 205b (that is, improving the surface accuracy), and the thickness of the laminated composite material 2 is compared. In the case where the thickness is too thin, the bag surface 205b is restrained so that the R portion can be prevented from being picked and the wrinkle 201 can be prevented from being generated. The size of the corner R portion of the curl plate 3 is adjusted to the radius size of the corner R portion 200 after the laminated composite material 2 is cured. This is because post-curing dimensions are necessary.

  However, the curl plate 3 has an inconvenience that the corner R portion is corrected only when the thickness of the laminated composite material 2 is relatively thin. For example, in the case of an L-shaped member formed by a male jig, the curl plate 3 can be easily adhered to the side of the angle sandwiching the corner R portion 200, that is, the straight portion, but the corner R portion 200 is swelled. As a result, the outer peripheral arc becomes larger, and the gap 204 formed between the corner R portion 200 of the laminated composite material 2 and the curl plate 3 becomes larger. This gap 204 hinders effective restraining action on the corner R portion 200 of the curl plate 3 during the curing process, and the curl plate 3 is pressed by the pressure from the outside of the pressure bag and / or the vacuum pressure in the pressure bag. If the gap does not disappear during the curing process even if pressed against the laminated composite material 2, it causes porosity (cavity) that is a molding defect in the corner R portion 200, and if there is no gap, the wrinkle 201 ( (See FIG. 3B). As the wrinkle 201 is brought into close contact with the curl plate 3 by reducing the thickness of the laminated composite material 2 as shown in FIG. This occurs because excess fibers that are pushed in from both sides of the portion 200 toward the gap 204 lose their escape.

  Further, the curl plate 3 has a disadvantage that it is very difficult to apply to the C-shaped material formed by the male jig 1. This is because the width of the curl plate 3 (C-shaped opening width) needs to be set to the dimension after curing, but since it is generally designed to be thick, the rigidity is very large, and the width dimension of the profile due to swelling is large. This is because the C-shaped member that is large cannot be covered.

  3 (a) and 3 (b) show an application example of the curl plate 3 to the male jig 1, the curl plate 3 is used when the thickness of the laminated composite material 3 is relatively thin, that is, pressurization. When the curl plate can restrain the bag surface (inner surface) of the laminated composite material laminated on the female jig by the pressure from outside the bag and / or the vacuum pressure inside the pressurized bag, the female jig also Can be applied.

  However, when the thickness of the laminated composite material is relatively large, the bridge becomes prominent, and the corner R portion (see 200B in FIG. 2A) on the inner surface is the side of the angle between which the curl plate sandwiches the corner R portion 200B. In other words, the curling plate can no longer be expected to have an effect as a close contact with (that is, the straight portion), that is, restraining the surface.

  Further, in the case of the C-shaped material, it is not possible to apply to the case of the male jig, and the curl plate becomes larger than the opening of the expanded C-shaped material, so that it does not fit into the C-shaped material. In general, it will be shown later that the use of a female jig is disadvantageous than the use of a male jig.

  Further, the curl plate has a disadvantage that it is not effective even when applied to a hot-draped laminated composite material. As shown in FIG. 4 (a), hot drape is performed by placing a composite plate 2B in which a required number of layers are laminated in advance on a male jig 1 placed on a fixed plate 4A. This resin is not cured but is bent into an angle shape under heating and pressurization to increase fluidity. The pressurization is performed, for example, by evacuating a space in a rubber film (diaphragm) covering and sealing the male jig 1 and the composite material flat plate 2B on the fixed plate 4A.

  In hot drape, molding is performed under the condition that the pressure tends to concentrate on the corner R portion 200 and the matrix resin easily flows, so that in principle, the corner R portion 200 can be prevented from swelling. However, since heating of the composite material proceeds and the molding quality deteriorates when heated for a too long time, the shaping time can be suppressed to within several tens of minutes by heating at 60 ° C to 90 ° C. If the resin flow does not catch up with the forced bending deformation due to this time constraint, the fiber on the outside of the corner R portion 200 is rather stretched as shown in FIG. (For example, refer to Patent Document 2). This is called “over-squeezing” and becomes more noticeable as the thickness of the laminated composite material 2B is larger and the corner R portion 200 is smaller, but unless the thickness of the laminated composite material 2B is very thin (for example, 1mm or less).

  In this way, when the plate thickness of the corner R portion 200 is reduced more than the regular radial dimension as shown by the broken line in FIG. 4B, the curl plate can be closely attached to the corner R portion 200 and restrained. In particular, the plate thickness of the corner R portion 200 does not become a regular dimensional shape.

  With the male jig, it is easier to squeeze the corner R portion when laminating the jig than when the female jig is used. However, even after squeezing, after a while, it floats again and tries to return to the original plate thickness, so it is difficult to keep the plate thickness narrowed. Also, since the ironing is done manually, the variation is large, and the fiber may be damaged by this ironing work. Even if a male jig is used, the corner R part swells and the molding defects (the R part is picked or wrinkled). Etc.) cannot be eliminated.

  As described above, when the male jig is used, it is possible to reduce the degree of molding failure or to increase the upper limit of the thickness at which the molding failure occurs, at least when the female jig is used.

  By the way, depending on the shape you want, you may have to use a female jig. For example, when the mating surface of the corresponding composite material part with the other part is on the outside, the composite material part must be cured using a female jig in order to ensure the surface accuracy of the mating surface. This is because it is very difficult to ensure the surface accuracy of the bag surface when a female jig is used. Therefore, the surface accuracy is ensured by using the mating surface as the jig surface.

  When the composite material is directly laminated on the female jig, as described above, a molding defect such as a bridge occurs in the corner R portion. This is caused by a molding defect in the male jig as described above. Since it is easy, as shown to Fig.5 (a), a composite material sheet is preshaped and laminated | stacked on the male jig | tool for lamination | stacking called the lamination type 1C. Then, the laminated mold 1C is removed, the shaped laminated composite material 2 is inverted, and this time, as shown in FIG. 5B, is cured using a female knife 1B for curing.

In this way, when a molding quality equivalent to that when using a male jig is required for a composite material part having a mating surface that requires the use of a female jig, the two types are used. Since a jig is necessary and handling is in two stages, the cost is high. However, the same inconvenience still remains when using the curl plate in the male jig described above.
Japanese Unexamined Patent Publication No. 4-270610 JP 7-47596 A

  The present invention has been made in view of such circumstances, and effectively reduces the swelling of the laminated composite material. Therefore, the “R portion is picked”, “wrinkle”, “bridge”, “hollow”, Providing plate thickness correction jigs for laminated composite materials that can suppress molding defects such as “porosity” and “too narrow”, plate thickness correction methods using the jigs, and molded products corrected by these methods The purpose is to do.

The thickness correction jig for a laminated composite material according to the present invention is a method in which a laminated composite material shaped so as to have an L-shaped or C-shaped cross section is heated and pressed through a sealable film. Further, a jig that is cured by being placed on the laminated composite material after shaping placed on the male jig for curing treatment, and at least at a temperature lower than the thermosetting temperature of the composite material, flexibility is provided. An inner dimension that matches the outer dimension after curing of the laminated composite material, and is elastically deformed when covered with the laminated composite material disposed on the male jig. To do.

  The above pressurization can be performed by vacuum suction in the film.

The coefficient of thermal expansion of the plate thickness correcting jig material can be equal to that of the composite material, and the elastic modulus of the material can be 10 to 80 GPa in Young 's modulus. An example of such a material is carbon fiber reinforced plastic .

  The thickness of the portion corresponding to the corner R portion of the laminated composite material is made thinner than other straight portions, and the portions having different thicknesses are connected through the portions where the thickness is smoothly changed. The portion where the thickness is smoothly changed can be a tapered portion.

The correction method according to the present invention is a method for heating a laminated composite material shaped so as to have an L-shaped or C-shaped cross section and by applying pressure through a sealable film. A method of covering and curing a laminated composite material after shaping formed on a male jig, comprising at least a material having flexibility at a temperature lower than the thermosetting temperature of the composite material, wherein the laminated composite An orthodontic jig having an inner dimension matched with an outer dimension after hardening of the material is covered with the laminated composite material arranged on the male jig and elastically deformed .

  The above pressurization can be performed by vacuum suction in the film.

  The male jig may have a missing portion having a size that matches the post-curing dimension of the laminated composite having an L-shaped cross section.

The molded product according to the present invention is corrected by the above method .

  According to the above-described invention, molding defects such as “R section picked”, “wrinkle”, “bridge”, “cavity”, “porosity”, “over-squeezing” due to swelling of laminated composite materials are suppressed. can do.

  Hereinafter, a plate thickness correcting jig, a plate thickness correcting method, and a molded product of a laminated composite material according to the present invention will be specifically described with reference to the accompanying drawings.

  In FIG. 6A, the male jig 1 has a C-shaped cross section. On this male jig 1, a plurality of (for example, 24) composite sheets made of prepreg and the like are laminated while forming the shape of the male jig 1, thereby forming a laminated composite material 2. . 6A and 6B, a broken line indicates a normal contour position after the laminated composite material 2 is cured (that is, a position corresponding to the dimension after curing).

  As shown by white arrows in FIG. 6A, the plate thickness correcting jig 7 according to the present embodiment is covered over the shaped and laminated laminated composite material 2. The plate thickness correcting jig 7 is made of an elastic material such as CFRP (Carbon Fiber Reinforced Plastics), and has a uniform thickness (for example, about 0.2 mm to 1.5 mm). Further, the plate thickness correcting jig 7 is manufactured so that the surface on the side in contact with the laminated composite material 2, that is, the inner surface matches the post-cured dimensions of the laminated composite material 2. The post-curing dimension is a dimension of the laminated composite material 2 in an ideal state in which no molding defects have occurred after the curing process.

  As described above, the plate thickness correcting jig 7 having a C-shaped cross section is manufactured so that the inner surface matches the post-curing dimensions of the laminated composite material 2, so that when it is put on the laminated composite material 2, As shown by arrows in FIG. 6A, the flanges on both sides are elastically deformed so as to be spread, but they are self-constrained in the horizontal direction by being covered with the laminated composite material 2. Further, since the plate thickness correcting jig 7 is flexible, the plate thickness correcting jig 7 is brought into close contact with the surface of the laminated composite material 2 by pressurization and / or vacuum pressure through a pressure bag during the curing process. It has been.

  Due to this elastic deformation, the laminated composite material 2 covered with the plate thickness correcting jig 7 has a corner R portion 200 (only one is shown in the figure) as shown in FIG. ) With the largest spring force (restoring force to restore the elastic deformation of the plate thickness correcting jig 7) at the connecting portion (that is, R stop), and such spring force is used to correct the plate thickness. It becomes smaller as it goes to the flange end of the jig 7. As a result, the spring force of the plate thickness correcting jig 7 acts so as to crease the “compression” of the laminated composite material 2 as shown by a two-dot chain line in FIG. 6B, and in FIG. Extrude toward the tip of the flange as indicated by the arrow. As a result, when the shape of the corner R portion 200 approaches the shape due to the plate thickness after normal curing, the spring force of the plate thickness correcting jig 7 which is the shape due to the plate thickness after normal curing becomes weak, and finally the lamination The corner R portion 200 of the composite material 2 converges to a dimension based on the normal plate thickness dimension. Actually, the plate thickness correction jig 7 and the laminated composite material 2 are applied with pressure and / or vacuum pressure through a pressure bag in addition to the spring force. Since it is water pressure, it can be considered that only the spring force having the pressure distribution acts on the shape correction.

  In the case of “too much drawing”, the reverse is true, and the spring force due to the elastic deformation of the plate thickness correcting jig works in the direction of pulling back the material that is insufficient for the “too much drawing” part from the front end of the flange portion.

  On the other hand, even though the plate thickness correction jig 7 has flexibility, it is sufficiently rigid compared to the laminated composite material 2 before curing. All the pressures and / or vacuum pressures are brought into close contact with the bag surface 205b of the laminated composite material 2 to smooth the surface of the laminated composite material 2 and make the entire plate thickness uniform.

Note that there is another embodiment to be described later when it is desired to further improve the smoothness of the planar portion. (See Figure 8)
As described above, the plate thickness correcting jig 7 has an effect of correcting the size of the corner R portion 200 to the normal post-curing radius size, and makes the entire plate thickness of the laminated composite material 2 uniform. Has the effect of smoothing the surface.

  The plate thickness correcting jig 7 according to the present embodiment can be applied as it is to the laminated composite material 2 having a cross-sectional shape other than the C-shaped cross section described above. For example, in the case of an L-shaped cross section, the laminated composite material 2 having a C-shaped cross section may be manufactured by the above procedure and then cut in half in the vertical direction. Further, it goes without saying that the present invention can also be applied to a shape having a curvature in a cross section in a direction orthogonal to the above (that is, the longitudinal direction in the case of a shape member).

  FIG. 7 shows another method for obtaining a laminated composite material 2 having an L-shaped cross section. In this method, the plate thickness correcting jig 7 having the same shape as that of the C-shaped section can be applied to the laminated composite material 2 having the L-shaped section. However, in this case, the male jig 1D is formed with a missing portion 105 dimensioned so that the entire portion of the cured laminated composite material 2 is fitted. Therefore, the mold surface 205a of the laminated composite material 2 is in contact with the missing portion 105, and the outer surface (outer surface) of the male jig 1D other than the missing portion 105 contacts the bag surface 205b of the laminated composite material 2. It touches.

  As shown in FIG. 8, the plate thickness correcting jig 7B according to another embodiment is used when a female jig is used in the straight portion 70 by increasing its rigidity, for example, by increasing the thickness of the straight portion 70. The same flatness (surface accuracy) can be obtained. That is, it is possible to ensure the surface accuracy of the outer mating surface without using a female jig. In the example of FIG. 8, the plate thickness correcting jig 7B is connected between the thick straight portion 70 and the thin corner R portion 71 by a taper portion 72 that smoothly changes the plate thickness. Thus, the distribution of the spring force or pressure applied to the laminated composite material 2 by the plate thickness correcting jig 7B can be smoothed.

  9 (a) to 9 (f) illustrate a procedure for manufacturing a laminated composite material 2 having a C-shaped cross section using a plate thickness correcting jig 7 as shown in FIGS. 6 (a) to 6 (c). FIG. The thickness correction jig 7 has a thickness of 0.75 mm and a Young's modulus of 10 to 80 GPa.

  First, as shown in FIGS. 9A and 9B, a composite material sheet composed of a plurality of prepregs is laminated to obtain a flat laminated composite material 2. Next, as shown in FIG. 9C, the flat laminated composite material 2 is placed on the male jig 1, and hot drape is performed as shown in FIG. 9D. In this hot drape, the laminated composite material 2 is heated by heating at a temperature that does not cure the laminated composite material 2 (about 40 ° C. to 90 ° C.) to soften the resin in the laminated composite material 2 and pressurizing it by vacuuming. Is bent along the male jig 1.

  The thickness of the laminated composite material 2 after curing is 5 mm, but the thickness of the corner R portion 200 of the laminated composite material 2 after hot drape is considerably smaller than 5 mm, as shown in FIG. (In other words, “too much aperture” has occurred). Therefore, as shown in FIG. 9 (e), the plate thickness correcting jig 7 is placed on the laminated composite material 2, and then surrounded by the bag material 40 as shown in FIG. 9 (f) and vacuum bagged. The bag material 40 is such that, for example, the laminated composite material 2 is wrapped in the order of a release film, a breather (polyester mat), and a nylon film.

  Then, autoclave is performed in a predetermined curing cycle (curing treatment). Usually, it is about 2 hours at 180 ° C. and 5.5 atm. Thus, if the laminated composite material 2 is cured using the plate thickness correcting jig 7, the plate thickness of the corner R portion 200 is substantially the same as the straight portion, as shown in FIG. 10 (b). As a result, “too much aperture” has been eliminated.

  As described above, when the plate thickness correcting jig 7 is used, the surface accuracy of the bag surface 205b with which the plate thickness correcting jig 7 contacts is very good and can be used as a mating surface (or reference surface) with other parts. The surface accuracy of the laminated composite material 2 manufactured under the conditions of FIGS. 9A to 9F was measured by the methods shown in FIGS. 11A to 11C and FIGS. 12A to 12C. Here, the laminated composite material 2 having a C-shaped cross section has a length of 400 mm and a width of 100 mm, and the front end of the flange portion is not trimmed.

  First, as shown in FIG. 11 (a), in order to measure the surface accuracy in the longitudinal direction of the laminated composite material 2 formed in the profile having a C-shaped cross section, the upper surface of the laminated composite material 2 is aligned along the longitudinal direction. Place a ruler 81. As shown in FIG. 11 (b), a position within a predetermined distance (in this case, 10 mm) from the R stop (that is, the position between the corner R portion and the straight line portion above it) is set as “measurement location”. 1 ”, the same position on the opposite side as“ measurement location 2 ”, and the intermediate position between“ measurement location 1 ”and“ measurement location 2 ”as“ measurement location center ”, and a ruler along these three locations. 81 were arranged respectively.

  And as shown in FIG.11 (c), when the one end of the longitudinal direction of the ruler 81 is pressed on the upper surface of the laminated composite material 2 about these three places, the amount of lifting from the upper surface of the laminated composite material 2 at the other end Were measured (Table 1).

次に、図１２（ａ）に示すように、積層複合材2の幅方向の面精度を測定するために、積層複合材2の上面に、幅方向に沿って定規82を配置する。図１２（ｂ）に示すように、長手方向の一端を「測定箇所１」、他端を「測定箇所２」、そして、「測定箇所１」と「測定箇所２」との間の中間位置を「測定箇所中央」とし、これら３箇所に沿って定規82をそれぞれ配置した。

Next, as shown in FIG. 12A, a ruler 82 is arranged along the width direction on the upper surface of the laminated composite material 2 in order to measure the surface accuracy in the width direction of the laminated composite material 2. As shown in FIG. 12 (b), one end in the longitudinal direction is “measurement location 1”, the other end is “measurement location 2”, and an intermediate position between “measurement location 1” and “measurement location 2”. A ruler 82 was arranged along each of these three locations as the “measurement location center”.

  And as shown in FIG.12 (c), the clearance gap between the ruler 82 and the upper surface of the laminated composite material 2 was measured about these three places, and the largest clearance gap was employ | adopted among these (Table 2).

このように、本実施の形態にかかる板厚矯正治具7を適用して矯正した積層複合材2の面精度は、その上面で、取り合い面や基準面とするために十分な面精度を有していることが分かった。

As described above, the surface accuracy of the laminated composite material 2 corrected by applying the plate thickness correction jig 7 according to the present embodiment has sufficient surface accuracy to be a mating surface or a reference surface on the upper surface. I found out that

  As described above, the laminated composite sheet thickness correction jig, the sheet thickness correction method, and the molded product according to the present invention effectively reduce the swelling of the laminated composite material. The present invention can also be applied to uses that are required to suppress molding defects such as “rare”, “wrinkle”, “bridge”, “cavity”, “porosity”, and “too narrow”.

The change in thickness of the laminated composite material when using a conventional male jig is shown, (a) is the state at the time of lamination (the broken line shows the normal contour position after curing of the laminated composite material), (b ) Is the state after curing. The change in thickness of the laminated composite material when using a conventional female jig is shown, (a) is the state at the time of lamination (the broken line shows the normal contour position after curing of the laminated composite material), (b ) Is the state after curing. The change in thickness of a laminated composite material when a conventional male jig and a curl plate are used in combination is shown. (A) is the state at the time of lamination (the broken line is the normal contour after curing of the laminated composite material) (B) shows the state after curing. (A) shows a hot drape of a laminated composite material using a conventional male jig, and (b) shows a state of the laminated composite material after hot drape (the broken line indicates a normal state after curing of the laminated composite material). Indicates contour position). (A) And (b) is a figure for demonstrating the conventional method of using the male type jig | tool for shaping | molding, and the female type jig | tool in order in order to shape | mold the component which has a joint surface on the outer side. (A)-(c) has shown the state which applied the board thickness correction jig concerning embodiment of this invention to the laminated composite material on the male jig | tool for C-shaped cross sections (dashed line) Indicates the normal contour position after curing of the laminated composite). The state which applied the plate | board thickness correction jig concerning embodiment of this invention to the laminated composite material on the male jig | tool for L-shaped cross sections is shown. The structure of the plate | board thickness correction jig | tool concerning another embodiment of this invention which can acquire the surface accuracy comparable as the time of using the conventional female jig | tool in a linear part is shown. (A)-(f) is a figure for demonstrating application of the plate | board thickness correction jig concerning embodiment of this invention in the case of manufacturing the laminated composite material which has a C-shaped cross section through hot drape. (A) is a figure which shows the corner | angular part R part of the laminated composite material after hot drape shown to FIG.10 (d), (b) is a corner of the laminated composite material after hardening processing in FIG.10 (f). It is a figure which shows the R part. (A)-(c) is a figure explaining the method which measured the surface precision (longitudinal direction) of the bag surface of the laminated composite material manufactured in the procedure of Fig.10 (a)-(f). (A)-(c) is a figure explaining the method which measured the surface precision (width direction) of the bag surface of the laminated composite material manufactured in the procedure of Fig.10 (a)-(f).

Explanation of symbols

1,1D male jig
2 Laminated composite materials
7 Plate thickness correction jig
72 Taper
105 Missing part (male jig)
200 Corner R section (of laminated composite)
205a mold surface
205b Bag side

Claims (11)

When the laminated composite shaped so as to have an L-shaped or C-shaped cross section is heated and pressurized through a sealable film, it is placed on the male jig for the curing process. It is a jig that is cured by covering the laminated composite material after shaping ,
At least at a temperature lower than the thermosetting temperature of the composite material, it is made of a flexible material,
Having an inner dimension that matches the outer dimension of the laminated composite after curing;
A laminated composite sheet thickness correcting jig, which is elastically deformed when covered with the laminated composite material disposed on the male jig.   2. The thickness correction jig for a laminated composite material according to claim 1, wherein the film is pressurized by vacuum suction.   The plate thickness correction jig for a laminated composite material according to claim 1 or 2, wherein the thermal expansion coefficient of the material is equivalent to that of the composite material. The thickness correction jig for a laminated composite material according to any one of claims 1 to 3, wherein the material is a carbon fiber reinforced plastic . 5. The thickness correction jig for a laminated composite material according to claim 1, wherein the elastic modulus of the material is 10 to 80 GPa in Young 's modulus. The thickness of the portion corresponding to the corner R portion of the laminated composite is made thinner than other straight portions,
6. The laminated composite sheet thickness correcting jig according to claim 1, wherein the portions having different thicknesses are connected to each other through a portion whose thickness is smoothly changed.   The thickness correction jig for a laminated composite material according to claim 6, wherein the portion whose thickness is smoothly changed is a tapered portion. When the laminated composite shaped so as to have an L-shaped or C-shaped cross section is heated and pressurized through a sealable film, it is placed on the male jig for the curing process. It is a method of covering and curing the laminated composite material after shaping ,
A correction jig made of a material having flexibility at least at a temperature lower than the thermosetting temperature of the composite material, and having an inner dimension matching the outer dimension after curing of the laminated composite material is placed on the male jig. A method for correcting the thickness of a laminated composite material, wherein the laminated composite material is elastically deformed over the laminated composite material.   9. The method for correcting the thickness of a laminated composite material according to claim 8, wherein the film is pressurized by vacuum suction.   10. The method for correcting a thickness of a laminated composite material according to claim 8 or 9, wherein the male jig has a missing portion having a dimension that matches the post-curing dimension of the laminated composite material having an L-shaped cross section. A molded article characterized by being corrected by the plate thickness correcting method according to any one of claims 8 to 10.

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