JP2016047619A - Method of producing fiber-reinforced resin molding and mold device therefor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method for producing a precise molding comprising a backside structure formed by injection molding on the rear face of a fiber-reinforced resin sheet without requiring excessive labor and time.SOLUTION: There is provided a method of producing a fiber-reinforced resin molding in which press formation is carried out on a fiber-reinforced resin sheet 100 sandwiched between a die 4 and a punch 5 and a backside structure is formed on the backside of it by injection of thermoplastic resin from the side of the punch 5. In the die 4 and punch 5, center parts 40,50 for molding the outline inside part of the molding and peripheral parts 41,51, to be outline outside parts, for fixing an outer edge part 110 of the fiber-reinforced resin sheet 100 are different parts each other. The center parts 40,50 and the peripheral parts 41,51 may respectively provide positional offset within a predetermined range in press direction while sliding each other. Both peripheral parts 41,51 sandwich the outer edge part 110 by sequential press actions, and then the outline inside part is formed by press molding with both center parts 40,50.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a method for producing a fiber-reinforced resin molded product and a mold apparatus thereof, and in particular, a thermoplastic resin is injection-molded on the back side of a molded body made of a thermoplastic resin sheet having reinforcing fibers to provide a backing structure. The present invention relates to a method for manufacturing a fiber-reinforced resin molded article and a mold apparatus for automatically performing the manufacturing method.

  Conventionally, a molding method called hybrid molding in which a thermoplastic resin sheet is shaped by press molding and a backing structure such as a rib or a boss is provided on the back side thereof by injection molding of a thermoplastic resin is disclosed in, for example, Japanese Patent Application Laid-Open No. 2004-2004. -276257 is well-known as described in Japanese Patent Publication No. 276257, and is widely used in the manufacture of automobile interior parts and the like because it is a manufacturing method that can obtain a molded product that is light and excellent in strength by a relatively simple process. .

  Japanese Patent Application Laid-Open No. 2012-206446 uses a fiber reinforced resin sheet in which carbon fibers are arranged in a thermoplastic resin, and inserts the sheet into a mold heated to a temperature higher than the softening temperature of the thermoplastic resin. By injecting the backing resin from the mold, and then cooling the mold while applying pressure, it is possible to obtain a molded article with further improved strength while suppressing the occurrence of sink marks (shrinkage distortion) due to cooling and solidification of the backing resin. Proposed molding methods have also been proposed.

  The above-mentioned fiber reinforced resin sheet is suitable for producing a molded product having excellent strength even though it is thin. However, when it is used for hybrid molding as described above, its thinness and stretchability are poor. For this reason, wrinkles and wraps (overlap) are likely to occur when the resin sheet is press-molded, and this has been considered as one of the factors that deteriorate the molding accuracy and the appearance of the finished product.

  In addition, in the case of hybrid molding using a fiber reinforced resin sheet, trimming is performed by cutting the resin sheet at the contour position of the molded product after press molding the resin sheet, or piercing at a position such as a boss on the resin sheet (Post-drilling) and other processes are required, and in addition to the space for placing the equipment for that process, it takes time and labor to move and place between processes, simplifying the process and manufacturing costs It was considered difficult to reduce this.

JP 2004-276257 A JP 2012-206446 A

  The present invention is intended to solve the above-described problems, and in a hybrid molding method in which a backing structure made of a thermoplastic resin is provided on a molded body of a fiber reinforced resin sheet, high accuracy without excessive labor and time is required. It is an object of the present invention to obtain a molded product.

  Therefore, the present invention performs press molding by placing a fiber reinforced resin sheet between a die and a punch of a mold apparatus, and injects a thermoplastic resin from the punch side to the back surface of the fiber reinforced resin sheet to give a predetermined In the method for manufacturing a fiber reinforced resin molded article provided with a backing structure, the die and the punch are formed at the center part for forming the contour inner part of the fiber reinforced resin molded part and the outer edge part of the fiber reinforced resin sheet serving as the contour outer part. The outer peripheral part for fixing the die is made up of separate parts, and the combined center part and outer peripheral part can be formed within a predetermined range while the slides of the center part and the outer peripheral part slide with each other, and the die is pressed. First, the outer edge portion of the fiber reinforced resin sheet is sandwiched and fixed at both outer peripheral portions by a series of pressing operations that move in the direction, and then the inner portion of the contour is press-formed at both central portions. It was prepared wherein.

  In this way, in the method of manufacturing a fiber reinforced resin molded article by hybrid molding in which a backing structure is provided by injection molding on the back side of the fiber reinforced resin sheet that is being press molded, the gold constituting the die and punch The center part for giving the shape of the molded part and the outer peripheral part for fixing the outer edge part of the fiber reinforced resin sheet are separated from each other and can be displaced while sliding in the press direction. As a manufacturing method, the outer edge part which becomes the blank part of the fiber reinforced resin sheet is fixed first at both outer peripheral parts while interlocking with a series of operations in the pressing direction, and then the product shape is press-molded at both central parts. As a result, even when using a fiber-reinforced resin sheet that is thin and poorly stretchable, the resin sheet can be displaced and wrinkles and wraps can be generated by a series of press operations without requiring a complicated mechanism or process. While avoided, it becomes easy to obtain in a short time with high precision of the molded article.

  Further, in this manufacturing method, the fiber reinforced resin sheet is formed by inserting a plurality of positioning holes formed in advance in the outer edge portion of the fiber reinforced resin sheet into a plurality of positioning pins protruding at predetermined positions on the outer peripheral portion pressing surface of the die. Is attached to the die side, positioning is performed, and then the pressing operation is started, and the outer edge portion is sandwiched between the outer peripheral portions while inserting the positioning pins into the insertion holes provided in the punch outer peripheral portion pressing surface, and the fiber reinforced resin. If the manufacturing method is characterized in that the sheet is fixed, the positioning of the sheet can be performed accurately and easily, and the displacement of the fiber reinforced resin sheet accompanying the press operation can be easily avoided.

  Further, in the above-described manufacturing method, between the both center portions where the inner contour portion is press-molded and the outer peripheral portions where the outer edge portions of the fiber-reinforced resin sheet are fixed, each other along with a series of pressing operations. Trimming the contour of the fiber reinforced resin molded product while shearing between the outer edge of the central pressing surface and the inner edge of the opening of the outer peripheral pressing surface along the contour of the fiber reinforced resin sheet by causing positional misalignment in the pressing direction If the manufacturing method is characterized by the above, trimming at the contour position of the molded product can be completed by only a series of press operations in one mold apparatus.

  Furthermore, in the manufacturing method described above, insertion holes are formed in the central portions at positions where they can communicate with each other, and the piercing pins inserted into the insertion holes on the punch side in accordance with the pressing operation are on the die side. In the latter half of a series of pressing operations, the fiber reinforced resin sheets press-molded at both center portions are positioned at predetermined positions of the outer edge of the piercing pin tip surface and the center pressing surface in the latter half of the series of pressing operations. If the manufacturing method is characterized in that the piercing is performed while shearing with the inner edge of the insertion hole opening portion, the piercing of the molded body can be completed only by a series of pressing operations in one mold apparatus.

  In addition, press molding means that presses the fiber reinforced resin sheet placed between the die and the punch to give the shape of the molded body, and the thermoplastic resin is injected from the punch side to the back of the fiber reinforced resin sheet being molded. In the mold apparatus for manufacturing a fiber reinforced resin molded article provided with a backing structure forming means for providing a predetermined backing structure, the die and punch are provided at the center for molding the contour inner part of the fiber reinforced resin molded article. And the outer peripheral part for fixing the outer edge part of the fiber reinforced resin sheet which is the outer part of the contour are made of different parts, respectively, and the combined central part and outer peripheral part slide to each other to position in the press direction. Each of the gaps can be formed within a specified range, and the outer edge of the fiber reinforced resin sheet is sandwiched and fixed at the outer periphery first by a series of pressing operations that move the die in the pressing direction. Then, if the inner part of the contour is press-molded at both central parts, the above-described method for manufacturing a fiber-reinforced resin molded product using a single mold apparatus is followed by a series of press operations. It can be realized only by.

  In addition, in this mold apparatus, a plurality of positioning pins are projected at predetermined positions on the outer peripheral surface pressing surface of the die, and the positioning pins are formed in advance at corresponding positions on the outer edge of the fiber reinforced resin sheet. By inserting the positioning hole, the fiber reinforced resin sheet is mounted and positioned on the die side, and then the press operation is started, so that both positioning pins are inserted into the insertion hole provided on the punch outer peripheral surface pressing surface. If the fiber reinforced resin sheet is fixed by sandwiching the outer edge portion at the outer periphery, the fiber reinforced resin sheet can be positioned accurately and easily, and the fiber reinforced resin accompanying the press operation It will be easy to avoid sheet misalignment.

  In addition, in the mold apparatus described above, a series of pressing operations are performed between the center portions press-molding the contour inner portion and the outer peripheral portions fixing the outer edge portions of the fiber-reinforced resin sheet. Along with the contour of the fiber reinforced resin sheet, it is automatically generated while shearing between the outer edge of the central pressing surface and the inner edge of the outer peripheral pressing surface along the contour of the fiber reinforced resin sheet. If the contour of the fiber reinforced resin molded product is trimmed, the trimming of the molded body can be automatically completed only by a series of pressing operations by the mold apparatus.

  Further, in the mold apparatus described above, insertion holes are formed in the center portions of the mold devices at positions where they can communicate with each other, and the piercing pins inserted into the insertion holes on the punch side in accordance with the press operation are die-molded. In the latter half of a series of pressing operations, the fiber reinforced resin sheet that is press-molded at both center portions is pressed at the predetermined position on the outer edge of the piercing pin tip surface and the center portion on the die side. If piercing is performed automatically while shearing with the inner edge of the opening of the insertion hole on the surface, the piercing of the product is automatically performed only by a series of pressing operations by this mold device. Complete.

  The center part and outer periphery of the die and punch are separated from each other and can be displaced in the press direction while sliding with each other, and the outer edge of the fiber reinforced resin sheet at both outer periphery while interlocking with a series of press operations According to the present invention in which the shape of the product is press-molded at both central portions after fixing the mold, a highly accurate molded product can be obtained without requiring excessive labor and time.

The longitudinal cross-sectional view which shows the state which mounted | wore the metal mold | die apparatus for enforcing the manufacturing method of the fiber reinforced resin molded product which is embodiment in this invention. The longitudinal cross-sectional view which shows the state which fixed the fiber reinforced resin sheet outer edge part from the state of FIG. The longitudinal cross-sectional view which shows the state which press-molded the shape of the fiber reinforced resin molded product from the state of FIG. The longitudinal cross-sectional view which shows the state which trimmed the outline of the fiber reinforced resin molded product from the state of FIG. The longitudinal cross-sectional view which shows the state which performed the piercing from the state of FIG. The longitudinal cross-sectional view which shows the state which inject | poured the molten resin from the state of FIG. 5 to the molded object back surface, and is shape | molded. The longitudinal cross-sectional view which shows the state which opened the type | mold from the state of FIG. 6, and made it possible to take out the fiber reinforced resin molded product. The perspective view which shows an example of the fiber reinforced resin molded product manufactured with the metal mold | die apparatus of FIG.

  Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings.

  FIG. 1 is a longitudinal sectional view showing a state in which a fiber reinforced resin sheet 100 is arranged in a mold apparatus 1 used for carrying out the method for manufacturing a fiber reinforced resin molded article of the present embodiment. The mold apparatus 1 presses the fiber reinforced resin sheet 100 disposed between the die 4 and the punch 5 while moving the movable main plate 2 toward the fixed main plate 3 by a drive mechanism (not shown). Press molding means for imparting a predetermined shape, and injection molding means for injecting a thermoplastic resin from the punch 5 side to the back surface of the fiber-reinforced resin sheet 100 being press-molded to provide a predetermined backing structure. The manufacturing method of the fiber reinforced resin molded product by hybrid molding can be carried out only with this apparatus.

  That is, among a plurality of bars extending in the pressing direction from the movable main plate 2, a combination of short bars 200 and the die 4 provided at the leading end thereof, the fixed main plate 3 and the sub-plates 8 and 7. Among the plurality of bars extending in the anti-pressing direction, the combination of the bars 300 and the punch 5 provided on the tip side thereof constitute press forming means, and the main plate 3 and the sub-plate 8 on the fixed side, 7, 6 and the molten resin passages 31, 81, 82, 71, 72, 73, 61, 62, 63, 52, 53, 54 formed in the punch 5, and the backing structure forming portion provided in the central portion 50 of the punch 5 50a constitutes the backing structure forming means.

  In addition, since the manufacturing method of the fiber reinforced resin molded product according to the present embodiment is a method of forming a backing structure such as a rib and a boss by injection molding on the side of the fiber reinforced resin sheet in the molded body, the fixed side is the die 4. The movable side is a punch 5, which is opposite to that of a normal mold apparatus. Further, since the fiber reinforced resin sheet 100 and the resin for injection molding use a thermoplastic resin, resin heating means (not shown) is provided at predetermined positions of each plate, die 4 and punch 5 in the mold apparatus 1. It is arranged.

  The bars connecting the plates are telescope-type telescopic and single-structured bars. Further, although not shown in detail, it is determined at each stage in the press operation. For the purpose of sequentially opening or closing the plates or predetermined mold parts, an elastic member or a support member having a plurality of types of resilience strength is appropriately disposed.

  In such a mold apparatus 1, the die 4 and the punch 5 include a center portion 40, 50 for forming the contour inner portion of the fiber reinforced resin molded product, and a fiber reinforced resin sheet serving as the outer portion of the contour. The outer peripheral portions 41 and 51 for fixing the outer edge portion 110 of the 100 are made of different parts, and the central portion is provided in the sliding holes 41a and 51a provided through the center of the outer peripheral portions 41 and 51 in the pressing direction. 40 and 50 are respectively inserted and combined. In the combination of the central portion 40 and the outer peripheral portion 41 and the combination of the central portion 50 and the outer peripheral portion 51, the components slide in each other in the pressing direction. The positional deviations along the direction can be formed within a predetermined range.

  Further, a plurality of positioning pins 45a, 45b,... Protrude in the pressing direction at predetermined positions on the outer peripheral portion 41 pressing surface of the die 4, and the mold apparatus 1 is opened as shown in FIG. In the state, the positioning holes 110a, 110b,... Formed in advance in the corresponding positions of the outer edge portion 110 of the fiber reinforced resin sheet 100 are arranged while being inserted through the pins 45a, 45b,. Is positioned accurately and easily with respect to the die 4.

  After that, by starting the pressing operation, as shown in FIG. 2, the distal ends of the positioning pins 45a, 45b,... Are inserted into the insertion holes 51b, 51c,. However, the outer edge portion 110 is sandwiched and pressed by the pressing surfaces of the outer peripheral portions 41 and 51, and the fiber reinforced resin sheet 100 is firmly fixed to the die 4 and the punch 5 at an accurate position. Therefore, as shown in FIG. 3, a method of press-molding the contour inner side portion of the fiber reinforced resin molded product at both center portions 40 and 50 is adopted, which is a characteristic portion in the present invention.

  Further, the mold apparatus 1 fixes both the central portions 40 and 50 that press-mold the contour inner portion of the fiber reinforced resin molded product in the fiber reinforced resin sheet 100 and the outer edge portion 110 that becomes the contour outer portion. The two outer peripheral portions 41 and 51 are displaced from each other in the direction along the press direction in accordance with a series of pressing operations. As shown in FIG. 4, the fiber reinforced resin molding in the fiber reinforced resin sheet 100 is performed. Trimming is automatically performed by cutting the outer peripheral portion 110 at the contour position while shearing between the outer edge of the central portion 40 pressing surface and the inner peripheral edge of the opening portion of the outer peripheral portion 51 pressing surface along the position that becomes the contour of the product. To do.

  Furthermore, as shown in FIG. 5, insertion holes 40g, 40h, 50b, and 50c are formed at positions where both the central portions 40 and 50 can communicate with each other. The piercing pins (nesting) 58 and 59 inserted in the insertion holes 50b and 50c on the punch 5 side are pushed in the anti-pressing direction by the bars 78 and 79 protruding in the anti-pressing direction, and the tip side is the die 4 side. It is configured to be inserted into the insertion holes 40g, 40h.

  Therefore, in the latter half of the series of pressing operations, the predetermined position of the fiber reinforced resin sheet 100 press-formed at both the central portions 40, 50 (the center position of the boss in the figure) is set to the outer edge of the front end surface of the piercing pins 58, 59. Piercing (perforation) is automatically performed while shearing at the insertion hole 40g, 40h inner edge of the opening portion of the central portion 40 pressing surface, and when this piercing is completed, the fiber reinforced resin molded product Is almost completed.

  Below, the manufacturing method of the fiber reinforced resin molding which is this Embodiment is demonstrated in detail, using drawing again.

  In the mold apparatus 1 after the mold opening, the die 4 and the punch 5 are greatly opened, and the tip end side of the positioning pins 45a, 45b,... Protrudes from a predetermined position of the outer peripheral portion 41 pressing surface of the die 4. ing. Therefore, as shown in FIG. 1, the fiber-reinforced resin sheet is inserted into the positioning pins 45a, 45b,... Through the positioning holes 110a, 110b,. By setting 100, the fiber-reinforced resin sheet 100 is accurately and easily positioned on the die 4. Further, when the mold is opened, the central portion 50 of the punch 5 is in a state of being displaced in the press direction from the outer peripheral portion 51.

  Thereafter, a pressing operation for moving the movable main plate 2 toward the fixed main plate 3 is performed to close the die, so that the distal end side of the positioning pins 45a, 45b,. The outer edge portion 110 is sandwiched between the outer peripheral portions 41 and 51 of the die 4 and the punch 5 while being inserted into the positioning holes 51b, 51c,. The resin sheet 100 is fixed firmly to the die 4 and the punch 5.

  If the mold closing is continued from that state, the central portion 50 protrudes relatively in the anti-pressing direction by moving the outer peripheral portion 51 backward in the pressing direction while leaving the central portion 50 of the punch 5 as shown in FIG. Therefore, the fiber reinforced resin sheet 100 is sandwiched between the pressing surfaces of both the central portions 40 and 50 and becomes a molded product obtained by press molding the outer shape of the fiber reinforced resin molded product.

  Thus, prior to press molding of the molded body portion by the central portions 40, 50, both outer peripheral portions 41 in a state where the outer edge portion 110 of the fiber reinforced resin sheet 100 is inserted into the positioning pins 45a, 45b,. , 51, it is easy to avoid misalignment and wrinkle wrap of the fiber reinforced resin sheet 100 due to press molding.

  When the mold closing is further continued, as shown in FIG. 4, both the central portions 40, 50 are displaced in the pressing direction integrally with the outer peripheral portions 41, 51 being integrally stopped, and the sub-plate 6 is moved. Stops in contact. By this operation, the fiber reinforced resin sheet 100 is sheared along the contour line of the fiber reinforced resin molded product, and the outer edge portion 110 that is a blank portion is deleted / separated, so that the trimming of the contour in the fiber reinforced resin molded product is automatically performed. Complete.

  If the mold closing is continued from that state, the sub-plate 6 is pushed in the pressing direction and stops while coming into contact with the sub-plate 7. However, as shown in FIG. The front ends of the provided bars 78 and 79 are inserted into the insertion holes 50b and 50c on the punch 5 side and pressed into the piercing pins 58 and 59 inserted in the inside in the anti-pressing direction. The operation of pushing into the insertion holes 40g, 40h is performed.

  By this operation, the portions of the fiber reinforced resin sheet 100 that coincide with the positions of the insertion holes 50b and 50c are sheared into the shape of the tip surface while being pushed into the insertion holes 40g and 40h by the tip surfaces of the piercing pins 58 and 59. And piercing is completed. The insertion holes 40g and 40h are formed so as to penetrate in the pressing direction at a predetermined position of the central portion 40 of the die 4 so that when the excavation residue due to piercing accumulates to some extent, it is discharged from the opening on the opposite side. It has become.

  Further, by closing the mold, as shown in FIG. 6, the sub-plate 7 comes into close contact with the sub-plate 8, and the molten resin passages 31, 81, 82, 71, 72, 73, 61, 62, 63, 52. , 53, 54 communicate with each other. When the mold is closed, a molten resin supply means (not shown) is connected to the opening of the molten resin passage 31 to inject the molten resin. Thereby, the inside of the backing structure forming portion 50a provided in the punch 5 is filled with the molten resin, and a backing structure is formed on the back side of the fiber-reinforced resin sheet 100 that is press-molded.

  In this case, a fiber reinforced resin is provided between the inner peripheral surfaces of the insertion holes 50b and 50c formed in the central portion 50 of the punch 5 and the outer peripheral surfaces of the piercing pins 58 and 59 inserted therein. A gap is formed from a shear position of the sheet 100 to a predetermined position, and a cylindrical boss is formed by filling the gap portion with a molten resin.

  When the injection molding of the molten resin is completed, the fiber reinforced resin molded product 120 is taken out with the mold open as shown in FIG. In this case, although not shown, an ejector plate provided with an ejector pin for releasing the fiber reinforced resin molded product 120 in the anti-pressing direction may be used, and the ejector pin may protrude in the anti-pressing direction.

  The taken out fiber reinforced resin molded article 120 has a structure as shown in FIG. 8, for example, and at the time of taking out, the rib 121 and the boss 122 as the backing structure are formed on the back side of the outer skin structure by the fiber reinforced resin sheet. 123 is formed, contour trimming and piercing at the center positions of the bosses 122 and 123 are completed, and the product is almost completed.

  At the time of taking out the product, the cut peripheral portion 110 and the runner 130 which are the blank portions of the fiber reinforced resin molded product in the fiber reinforced resin sheet 100 are also exposed, and the fiber reinforced resin can be obtained by taking out all of them. One cycle of the manufacturing operation of the molded product is completed.

  As described above, in the hybrid molding method in which a thermoplastic resin-backed structure is provided on a fiber-reinforced resin sheet molded body, the present invention allows a fiber-reinforced resin molded product to be easily formed only by a press operation by a series of mold closing operations. It can be manufactured, and a high-precision molded product can be obtained at a low cost without excessive labor and time.

  1 Mold device, 2, 3 Main plate, 4 Die, 5 Punch, 6, 7, 8, 9 Sub plate, 40, 50 Central part, 40g, 40h, 50b, 50c Insertion hole, 41, 51 Outer part, 41a , 51a Slide hole, 45a, 45b Positioning pin, 50a Backing structure forming part, 58, 59 Piercing pin, 78, 79, 200, 300, 350 bar, 100 Fiber reinforced resin sheet, 110 Outer edge part, 110a, 110b Positioning Hole, 120 Fiber reinforced resin molded product, 121 Rib, 122, 123 Boss

Claims (8)

  A fiber in which a fiber reinforced resin sheet is placed between a die and a punch of a mold apparatus to perform press molding, and a thermoplastic resin is injected from the punch side to the back surface of the fiber reinforced resin sheet to provide a predetermined backing structure In the method for manufacturing a reinforced resin molded product, the die and the punch are for fixing a central portion for forming the contour inner portion of the fiber reinforced resin molded product and an outer edge portion of the fiber reinforced resin sheet to be the contour outer portion. Each of the outer peripheral portion and the outer peripheral portion are combined with each other, and the center portion and the outer peripheral portion that are combined with each other can slide within each other within a predetermined range while sliding with each other. First, the outer edge portion of the fiber reinforced resin sheet is sandwiched and fixed at the outer peripheral portions by a series of pressing operations to be moved to the center, and then the inner portion of the contour is pressed at the central portions. Molded, fiber-reinforced method for producing a resin molded article, characterized in that.   The fiber-reinforced resin sheet is formed by inserting a plurality of positioning holes formed in advance in the outer edge portion of the fiber-reinforced resin sheet into a plurality of positioning pins protruding at predetermined positions on the outer peripheral portion pressing surface of the die. By mounting on the die side and positioning, and then starting the press operation, the outer edge portion is sandwiched between the outer peripheral portions while inserting the positioning pins into the insertion holes provided in the punch outer peripheral portion pressing surface. The method for producing a fiber-reinforced resin molded article according to claim 1, wherein a fiber-reinforced resin sheet is fixed.   Positions in the press direction with each other along a series of pressing operations between the central portions that are press-molded on the contour inner portion and the outer peripheral portions that are fixing the outer edge portions of the fiber-reinforced resin sheet. By generating a shift, the contour of the fiber reinforced resin molded product is trimmed along the contour of the fiber reinforced resin sheet while shearing between the outer edge of the central pressing surface and the inner edge of the opening of the outer peripheral pressing surface. The method for producing a fiber-reinforced resin molded article according to claim 1 or 2, characterized by the above-mentioned.   Insertion holes are formed in the central portions at positions where they can communicate with each other, and a piercing pin inserted into the insertion hole on the punch side in accordance with a press operation is inserted into the insertion hole on the die side. In the latter half of a series of pressing operations, the predetermined positions of the fiber-reinforced resin sheets that are press-molded at both the center portions are arranged at the outer edge of the piercing pin tip surface and the center portion pressing surface. 4. The method for producing a fiber-reinforced resin molded article according to claim 1, wherein piercing is performed while shearing with an inner edge of the insertion hole opening portion.   Press molding means for pressing the fiber reinforced resin sheet disposed between the die and the punch to give the shape of the molded body, and while injecting the thermoplastic resin from the punch side to the back surface of the molded fiber reinforced resin sheet In a mold apparatus for producing a fiber reinforced resin molded article provided with a backing structure forming means for providing a predetermined backing structure, the die and the punch are formed in a central portion for molding the contour inner portion of the fiber reinforced resin molded article. And the outer peripheral part for fixing the outer edge part of the fiber-reinforced resin sheet that becomes the outer part of the contour are made of different parts, respectively, and the combined center part and the outer peripheral part slide with respect to each other in the press direction position. Each of the deviations can be formed within a predetermined range, and by a series of pressing operations for moving the die in the pressing direction, the front of the fiber reinforced resin sheet is first formed at both the outer peripheral portions. After fixing sandwich the outer edge, the mold apparatus which is characterized in that the press molding of the contour inner portion at both central portion.   A plurality of positioning pins project from a predetermined position on the outer peripheral surface pressing surface of the die, and a plurality of positioning holes formed in advance at the corresponding positions of the outer edge portion of the fiber reinforced resin sheet are inserted into the positioning pins. The fiber reinforced resin sheet is mounted and positioned on the die side, and then the press operation is started, thereby inserting the positioning pin into the insertion hole provided in the punch outer peripheral portion pressing surface, and the outer edge at both outer peripheral portions. The mold apparatus according to claim 5, wherein the fiber reinforced resin sheet is fixed by sandwiching a portion.   Positions in the press direction with each other along a series of pressing operations between the central portions that are press-molded on the contour inner portion and the outer peripheral portions that are fixing the outer edge portions of the fiber-reinforced resin sheet. Deviation occurs, and fiber reinforced resin molding is automatically performed while shearing between the outer edge of the central portion pressing surface and the inner edge of the outer peripheral portion pressing surface along the contour of the fiber reinforced resin sheet. 7. The mold apparatus according to claim 5, wherein the contour of the product is trimmed. Insertion holes are formed in the central portions at positions where they can communicate with each other, and a piercing pin inserted into the insertion hole on the punch side is inserted into the insertion hole on the die side in accordance with a pressing operation. In the latter half of a series of pressing operations, the fiber reinforced resin sheet press-molded at both center portions is positioned at a predetermined position on the outer edge of the piercing pin tip surface and the center-side pressing surface on the die side. 8. The mold apparatus according to claim 5, wherein piercing is automatically performed while shearing with an inner edge of the insertion hole opening portion.

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