Fiber reinforced composite material mold and preparation method

Abstract

The fiber reinforced composite material mold comprises N sub-molds which are connected with one another, the sub-die is a rectangular die with a hole in the center; and a plurality of limiting holes which are arranged in a straight line are respectively distributed on the long-edge side surface and the short-edge side surface of the sub-mold. Sequentially selecting fibers, determining a volume fraction and an arrangement mode, selecting a proper hole site to insert the fibers into the first-layer sub-mold or the bottom mold, selecting a base material, observing the flowability of the base material, curing, judging whether the base material is semi-cured or not, if not, reselecting, and if yes, selecting a proper hole site to insert the fibers into the second-layer sub-mold; the method comprises the following steps: selecting a matrix material, stacking and curing, repeating until a proper hole site is selected to insert fibers into the Nth layer of sub-mold, selecting the matrix material, and stacking and curing if the judgment result is yes, so that the hole-shaped fiber reinforced composite material parts with different fiber directions and different laying layers can be obtained by the method.

Description

Technical Field

[0001] The invention relates to the field of fiber reinforced composite material molds, and in particular to a fiber reinforced composite material mold and a preparation method thereof. Background Art

[0002] Composite materials are a type of heterogeneous materials with distinct interfaces composed of two or more different materials on a macroscopic scale. They are divided into anisotropic composite materials and isotropic composite materials according to their performance characteristics; they can be divided into structural composite materials and functional composite materials based on application scenarios. Among them, polymer-based composite materials have low density, high specific strength, high specific modulus, good fatigue resistance, multifunctionality, and good processing technology. Compared with metal-based and ceramic-based composite materials, they are more widely used in the fields of aerospace, energy vehicles, architectural glass, naval ships, satellites, and biomedicine.

[0003] The evaluation of polymer-based composite materials includes, but is not limited to, mechanical property evaluation, functional evaluation, biocompatibility evaluation, etc. Among them, mechanical property evaluation is mainly carried out through stretching, bending, impact, etc. Conventional polymer homogeneous materials are molded by a one-time injection mold. Particle-reinforced polymer-based composite materials can be molded by a one-time injection mold because the particles are evenly dispersed in the matrix. Long fiber-reinforced polymer-based composite materials are difficult to be molded by a one-time injection mold due to the arrangement orientation and regularity of the fibers. The existing technology mainly weaves the fibers in advance and then lays them up and injects resin for curing, but due to the limitations of the weaving process, the design range of the fiber arrangement direction, fiber volume fraction and distribution method is small, and the amount of fiber used is large. Summary of the invention

[0004] In view of this, a fiber reinforced composite material mold and preparation method overcomes the limitations of the weaving process by adjusting the mold hole position, the small design range of the fiber arrangement direction, fiber volume fraction and distribution method, and the large amount of fiber used.

[0005] Specifically according to the first aspect of the embodiment of the present invention, a fiber reinforced composite material mold is provided, comprising: N interconnected sub-molds; wherein the sub-mold is a rectangular mold with a mold hole set in the center; and the long side and short side of the sub-mold are respectively provided with a plurality of limiting holes arranged in a line. The fiber structures in different directions can be laid through the limiting holes on the long side and short side, and the N interconnected sub-molds can be added with a matrix material to form a fiber reinforced composite material with a multi-directional laminated mold hole shape.

[0006] An embodiment of the present invention provides a fiber reinforced composite material mold, wherein the sub-molds are made of magnetic composite materials, and the sub-molds are connected by magnetic force, so that the connection between the sub-molds is easier and more convenient to disassemble.

[0007] According to one embodiment of the present invention, a fiber reinforced composite material mold is provided, wherein the N interconnected sub-molds further include: 1 bottom mold and N-1 stacking molds; wherein, the 1 bottom mold is provided with a support, the N-1 stacking molds are provided with limiting holes matching the support columns, the N-1 stacking molds are mechanically connected to the support provided on the bottom mold through the limiting holes, the connection between the sub-molds is stable, and the integrated structure of the composite material is stable.

[0008] According to one embodiment of the present invention, a fiber reinforced composite material mold is provided, wherein the multiple limiting holes arranged in a line on the long side of the sub-mold are grooved semi-through holes, and the multiple limiting holes arranged in a line on the short side are closed inner through holes; or the multiple limiting holes arranged in a line on the long side are closed inner through holes, and the multiple limiting holes arranged in a line on the short side are grooved semi-through holes; each grooved semi-through hole has at least two closed inner through holes on each side edge, and the fiber can be locked through the semi-groove through hole and the full through hole.

[0009] In one embodiment of the present invention, a fiber reinforced composite material mold is provided, wherein the long side and short side of the sub-mold are respectively provided with a plurality of limit holes arranged in a line, and the inner side thereof is provided with a liquid blocking wall. When the viscosity of the matrix material is extremely low or the fiber volume fraction is extremely small, the liquid blocking wall can prevent the matrix material from overflowing along the hole wall.

[0010] An embodiment of the present invention provides a fiber reinforced composite material mold, wherein N interconnected sub-molds have multiple limiting holes arranged in a line distributed on the long side surfaces and multiple limiting holes arranged in a line on the short side surfaces, which are arranged in three modes a, b, and c according to geometric features; wherein modes a, b, and c respectively meet the requirements of ±45°, ±30°, and ±60° laminated mold fiber reinforced composite material preparation, and can prepare more types of laminated composite materials such as 0°, ±45°, ±30°, ±60°, and ±90°.

[0011] An embodiment of the present invention provides a fiber reinforced composite material mold, wherein N interconnected sub-molds further include: an adjustment mold with multiple small rectangular holes, and the stress and strain of the composite material are adjusted inside the composite material by setting the small rectangular adjustment mold to relieve stress concentration.

[0012] In one embodiment of the present invention, a fiber reinforced composite material mold is provided, wherein the mold hole provided at the center of the bottom mold and the mold hole provided at the center of the stacking mold are of different shapes. The mold hole provided at the center of the bottom mold can be a small rectangle of the orientation mold, and a fiber reinforced composite material with a surface orientation layer can be prepared. The mold hole and the mold hole provided at the center of the stacking mold can also be of other shapes, and it can be considered that all that can be prepared are within the scope of protection, without any single limitation.

[0013] An embodiment of the present invention provides a fiber reinforced composite material mold, wherein N interconnected sub-molds are made of transparent resin or composite material, which facilitates the photocuring effect of the matrix material in the mold.

[0014] An embodiment of the present invention provides a fiber-reinforced composite material mold, in which the mold holes arranged in the center of the sub-mold, the bottom mold, and the stacking mold are standard I-shaped stretching molds, and stretching parts of different types of composite materials can be directly prepared. The stretching experiment explores the interaction between the fiber and the matrix.

[0015] An embodiment of the present invention provides a fiber-reinforced composite material mold. The mold holes arranged in the center of the sub-mold, the bottom mold, and the stacking mold are large rectangular, which can directly prepare bent parts of different types of composite materials. 3- and 4-point bending experiments are used to explore the interaction between the fiber and the matrix.

[0016] An embodiment of the present invention provides a fiber reinforced composite material mold, wherein the mold holes arranged in the center after being connected from top to bottom are all different and change in a gradient, and the inner cavity forms a cylindrical cavity.

[0017] An embodiment of the present invention provides a fiber reinforced composite material mold, wherein the mold holes arranged in the center after being connected from top to bottom are all different and change in a gradient, and the inner cavity forms a spherical cavity.

[0018] In one embodiment of the present invention, the sub-mold includes, but is not limited to, common photocurable resins, photocurable rubbers, photocurable hydrogels, and other materials that can be formed into a solid state through photocuring.

[0019] In one embodiment of the present invention, the fiber materials used include, but are not limited to, common fiber materials and fiber materials that are in the research and development stage, such as carbon fiber, glass fiber, aramid fiber, boron fiber, bamboo fiber, ultra-high molecular weight polyethylene fiber, etc. of various specifications and properties. All fiber materials that can be prepared by this mold are within the protection scope of the patent of this invention.

[0020] In one embodiment of the present invention, the matrix material used includes, but is not limited to, common thermoplastic resins, thermosetting resins, hydrogels, etc. that are in the research and development stage. All matrix materials that can be prepared by this mold are within the protection scope of the patent of the present invention.

[0021] According to a second aspect of an embodiment of the present invention, a method for preparing a fiber reinforced composite material using a mold is provided, which includes selecting fibers, determining the fiber volume fraction and the fiber arrangement in sequence, selecting appropriate hole positions to insert the fibers into a first layer of a sub-mold or a bottom mold, selecting a matrix material, observing the fluidity of the matrix material and curing it, and determining whether it can be semi-cured. If the determination is no, returning to reselect the matrix material, and if the determination is yes, selecting appropriate hole positions to insert the fibers into a second layer of a sub-mold, stacking the second layer of molds, adding the matrix material to the mold and curing it, and repeating the process until selecting appropriate hole positions to insert the fibers into an Nth layer of a sub-mold, stacking the Nth layer of sub-molds, adding the matrix material to the mold and curing it. This method can simply obtain an integrated fiber reinforced composite material component with different fiber directions and different layers.

[0022] An embodiment of the present invention provides a method for preparing a fiber-reinforced composite material using a mold. After selecting a suitable hole position to insert the fiber into a sub-mold, it is determined whether orientation adjustment is required. If it is determined to be no, the sub-molds are stacked, and a matrix material is added to the mold and cured. If it is determined to be yes, a fiber orientation adjustment layer is stacked, and a matrix material is added to the orientation adjustment layer and cured. Then, the sub-molds are stacked, and the matrix material is added to the mold and cured. This method can further simply obtain an integrated fiber-reinforced composite material product with different fiber directions and different layups that can locally adjust internal stress and internal strain.

[0023] According to the technical solution of the embodiment of the present invention, an integrated fiber-reinforced composite material product with different fiber directions and different layers for locally adjusting internal stress and internal strain can be obtained. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 Schematic diagram of a mold structure according to an exemplary embodiment of the present invention.

[0025] Figure 2 Schematic diagram of the mold structure according to the second embodiment of the present invention.

[0026] Figure 3 2 is a front view of a mold structure according to a second embodiment of the present invention.

[0027] Figure 4 It is a left view of the mold structure according to the second embodiment of the present invention.

[0028] Figure 5 4 is a top view of a stacked mold according to a second embodiment of the present invention.

[0029] Figure 6 2 is a structural diagram of a supporting mold according to a second embodiment of the present invention.

[0030] Figure 7 Schematic diagram of the mold structure according to the third embodiment of the present invention.

[0031] Figure 8Schematic diagram of the mold structure according to the fourth embodiment of the present invention.

[0032] Fig. 9 4 is a structural diagram of a laminated mold according to a fourth embodiment of the present invention.

[0033] Fig.10 Schematic diagram of a ±45° laminated mold fiber reinforced composite material according to an embodiment of the present invention.

[0034] Fig.11 Schematic diagram of a ±30° laminated mold fiber reinforced composite material according to an embodiment of the present invention.

[0035] Fig.12 Schematic diagram of a ±60° laminated mold fiber reinforced composite material according to an embodiment of the present invention.

[0036] Fig.13 Schematic diagram of a multi-directional laminated mold fiber reinforced composite material according to an embodiment of the present invention.

[0037] Fig.14 4 is a front view of a plurality of bidirectional stacking molds according to an embodiment of the present invention.

[0038] Fig.15 4 is a front view of a single multi-directional stacked mold according to an embodiment of the present invention.

[0039] Fig.16 4 is a left side view of a single multi-directional stacking mold according to an embodiment of the present invention.

[0040] Fig.17 4 is a structural diagram of a laminated mold according to a fifth embodiment of the present invention.

[0041] Fig.18 The laminated mold structure according to the fifth embodiment of the present invention Figure 2 .

[0042] Fig.19 1. It is a perspective view and a partial enlarged view of the laminated mold structure according to the sixth embodiment of the present invention.

[0043] Fig. 20 2 is a structural diagram of a laminated mold according to the seventh embodiment of the present invention.

[0044] Fig.21 4 is a diagram showing the structure of a sub-mold of a stacked mold according to the seventh embodiment of the present invention.

[0045] Fig. 22 4 is a structural diagram of a laminated mold according to an eighth embodiment of the present invention.

[0046] Fig.23 4 is a structural diagram of a laminated mold according to a ninth embodiment of the present invention.

[0047] Fig.24This is the first method for preparing a fiber-reinforced composite material according to an embodiment of the present invention.

[0048] Fig.25 This is a second method for preparing a fiber-reinforced composite material according to an embodiment of the present invention. DETAILED DESCRIPTION

[0049] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0050] Fiber reinforced composite material mold combination of embodiment 1 of the present invention Figure 1 , Figure 10-12 , Fig.14 , the fiber reinforced composite material mold uses resin material, including: N interconnected sub-molds 1; wherein, the sub-mold 1 is a rectangular mold with a thickness of 2mm and a mold hole 4 is set in the center; the side of the long side of the sub-mold 1 is distributed with a plurality of limiting holes 3 with a diameter of 1mm arranged in a line. The side of the short side is respectively distributed with a plurality of limiting holes 2 with a diameter of 1mm arranged in a line. The limiting hole 2 is inserted into the positioning hole of the fiber, and the fiber reinforced composite material of the 0° laminated mold is prepared; the limiting hole 3 is inserted into the positioning hole of the fiber, and the fiber reinforced composite material of the 90° laminated mold is prepared; the spacing between the limiting holes 3 and 2 is arranged according to the geometric characteristics in three ways of a, b, and c. The stacking effect is as follows Fig.14 ; Among them, after the fiber is inserted into the empty space in the limiting hole of method a, Fig.10 Meet ±45° laminated mold fiber reinforced composite material preparation; b mode limit hole inserts fiber into the empty position Fig.11 Meet ±30° laminated mold fiber reinforced composite material preparation; c mode limit hole inserts fiber into the empty position Fig.12 The preparation of fiber-reinforced composite materials that meet the ±60° stacking mold can prepare fiber-reinforced composite materials with more directions if the non-aligned holes are inserted into the fibers. N sub-molds 1 are magnetic composite materials that are connected to each other by magnetic force. By controlling the fiber insertion method and the number and sequence of stacking in three methods a, b, and c, adding the matrix material and curing layer by layer, a multi-directional stacked center-hole fiber-reinforced composite material can be formed.

[0051] Fiber reinforced composite material mold combination of embodiment 2 of the present invention Figure 1 , Figure 5-Figure 6 , Fig.14 Figure 15-18The fiber reinforced composite mold uses resin material, including: N interconnected sub-molds 1; the sub-mold 1 is a rectangular mold with a thickness of 2mm and a mold hole 4 is set in the center; the side of the long side of the sub-mold 1 is distributed with a plurality of limit holes 3 with a diameter of 1mm arranged in a line. The side of the short side is respectively distributed with a plurality of limit holes 2 with a diameter of 1mm arranged in a line. The arrangement of the limit holes 2 is as follows: Fig.16 The arrangement of the limiting holes 3 is A, B, C, and the continuous multi-holes are as follows: Fig.15 By simply controlling the fiber insertion method, adding the matrix material and solidifying it layer by layer and connecting them with each other through magnetic force, a multi-directional laminated center-hole fiber-reinforced composite material can be formed.

[0052] Fiber reinforced composite material mold combination of embodiment 3 of the present invention Figure 2-Figure 6 , Figure 10-12 , Fig.14 , N interconnected sub-molds include: a bottom mold 1 with a thickness of 2mm and N-1 stacking molds 2 with a thickness of 2mm, each of which has a mold hole 4 in the center; wherein, a support 1.1 with a diameter of 2.9mm and a height of 2.4cm is provided on the bottom mold 1, and a limiting hole 2.1 with a diameter of 3.1mm matching the support column is provided on the N-1 stacking molds 2. The N-1 stacking molds 2 are stably connected to the support 1.1 provided on the bottom mold 1 one by one through the limiting holes 2.1, and the fibers can pass through the limiting holes 1.2, 1.3, 2.2, and 2.3 with a diameter of 1mm on the long side and short side of the bottom mold 1 and the N-1 stacking molds 2 in turn to prepare a composite material with a stable integrated structure. The limiting holes 1.2 and 2.2 are aligned with the holes for inserting fibers, and the fiber-reinforced composite material of the stacking mold is prepared at 0°; the limiting holes 1.3 and 2.3 are aligned with the holes for inserting fibers, and the fiber-reinforced composite material of the stacking mold is prepared at 90°; the limiting holes 1.3 and 2.3 correspond to 1.2 and 2.2 respectively, and the arrangement spacing is arranged according to the geometric characteristics in three ways: a, b, and c. The stacking effect is as follows Fig.14 ; Among them, the limiting holes 1.3 and 2.3 of method a correspond to 1.2 and 2.2 respectively, and the spacing is equidistant. After the fiber is inserted into the empty space, Fig.10 Meet the ±45° laminated mold fiber reinforced composite material preparation; b mode limit holes 1.3, 2.3 arrangement spacing is √3 times the limit holes 1.2, 2.2 arrangement spacing, after inserting the fiber into the empty space Fig.11 Meet the ±30° laminated mold fiber reinforced composite material preparation; c mode limit holes 1.2, 2.2 arrangement spacing is √3 times the limit holes 1.3, 2.3 arrangement spacing, after inserting the fiber into the empty space Fig.12The preparation of fiber-reinforced composite materials that meet the ±60° stacking mold can prepare fiber-reinforced composite materials with more directional arrangements if the non-aligned holes are inserted into the fibers. By controlling the fiber insertion method and the number and sequence of stacking in the three methods of a, b, and c, the matrix material is added and cured layer by layer to form a multi-directional stacking hole-shaped fiber-reinforced composite material.

[0053] Fiber-reinforced composite material mold combination of embodiment 4 of the present invention Figure 2-Figure 6 , Figure 10-12 , Fig.14 , N interconnected sub-molds include: 1 bottom mold 1 with a thickness of 2mm and N-1 stacking molds 2 with a thickness of 2mm; wherein, 1 bottom mold 1 is provided with a support 1.1 with a diameter of 2.9mm and a height of 2.4cm, and N-1 stacking molds 2 are provided with limiting holes 2.1 with a diameter of 3.1mm matching the support column, and N-1 stacking molds 2 are stably connected to the support 1.1 provided on the bottom mold 1 through the limiting holes 2.1 one by one, and the fibers can pass through the limiting holes 1.2, 1.3, 2.2, and 2.3 on the long side and short side of the bottom mold 1 and the N-1 stacking molds 2 in turn to prepare a composite material with a stable integrated structure. Assuming that the spacing between the limiting holes 1.2 and 2.2 is X, and the arrangement method is B, such as Fig.16 The spacing between the limit holes 1.3 and 2.3 is √3 / 3X,X,√3X from the 0 point, and the arrangement method is A,B,C continuous multi-holes such as Fig.15 , a multi-directional laminated pore-shaped fiber-reinforced composite material can be formed by simply controlling the fiber insertion method and adding the matrix material for layer-by-layer solidification.

[0054] Fiber-reinforced composite material mold combination of embodiment 5 of the present invention Figure 7 , Figure 5-Figure 6 , Figure 10-12 , Fig.14 The fiber-reinforced composite mold uses resin material, including: N interconnected sub-molds 1; wherein, the sub-mold 1 is a rectangular mold with a thickness of 2mm and a mold hole 4 is set in the center, and the mold hole 4 is the standard tensile specimen specification of ISO 527-2 "Determination of Tensile Properties of Plastics"; a plurality of limiting holes 3 with a diameter of 1mm arranged in a line are distributed on the side of the long side of the sub-mold 1. A plurality of limiting holes 2 with a diameter of 1mm arranged in a line are distributed on the side of the short side. The limiting hole 2 is inserted into the positioning hole of the fiber, and the fiber-reinforced composite material of the laminated mold is prepared at 0°; the limiting hole 3 is inserted into the positioning hole of the fiber, and the fiber-reinforced composite material of the laminated mold is prepared at 90°; the spacing between the limiting holes 3 and 2 is arranged according to the geometric characteristics in three ways of a, b, and c, and the stacking effect is as follows Fig.14 Among them, the spacing of the limiting holes 3 and 2 in mode a is equidistant, and the fiber is inserted into the empty space. Fig.10Meet the ±45° laminated mold fiber reinforced composite material preparation; b mode limit hole 3 arrangement spacing is √3 times the limit hole 2 arrangement spacing, after inserting the fiber into the empty space Fig.11 Meet ±30° laminated mold fiber reinforced composite material preparation; c mode limit hole 2 arrangement spacing is √3 times the limit hole 3 arrangement spacing, after inserting the fiber into the empty space Fig.12 The preparation of fiber-reinforced composite materials that meet the ±60° stacking mold can prepare fiber-reinforced composite materials with more directions if the non-aligned holes are inserted into the fibers. N sub-molds 1 are magnetic composite materials that are connected to each other by magnetic force. By controlling the fiber insertion method and the number and sequence of stacking in three ways a, b, and c, adding the matrix material and curing layer by layer, a multi-directional stacking hole-shaped fiber-reinforced composite material can be formed.

[0055] Fiber-reinforced composite material mold combination according to Example 6 of the present invention Figure 7 , Figure 5-Figure 6 , Fig.14 Figure 15-18 The fiber reinforced composite mold uses resin material, including: N interconnected sub-molds 1; the sub-mold 1 is a rectangular mold with a thickness of 2mm and a mold hole 4 is set in the center, and the mold hole 4 is the standard tensile specimen specification of ISO 527-2 "Determination of Tensile Properties of Plastics"; the side of the long side of the sub-mold 1 is distributed with a plurality of limit holes 3 with a diameter of 1mm arranged in a line. The side of the short side is respectively distributed with a plurality of limit holes 2 with a diameter of 1mm arranged in a line. Assuming that the spacing of the limit holes 2 is X, and the arrangement method is B, as shown in Fig.16 The spacing of the limit holes 3 is √3 / 3X,X,√3X from the 0 point, and the arrangement is A, B, C continuous multi-holes such as Fig.15 , by simply controlling the fiber insertion method, adding the matrix material and solidifying it layer by layer and connecting them with each other through magnetic force, a multi-directional laminated pore-shaped fiber-reinforced composite material can be formed.

[0056] Fiber-reinforced composite material mold combination of Example 7 of the present invention Figure 8-Figure 9 , Figure 10-12 , Fig.14, N interconnected sub-molds include: a bottom mold 1 with a thickness of 2mm and N-1 stacking molds 2 with a thickness of 2mm, each of which is provided with a mold hole 4 in the center of the mold, and the mold hole 4 is the standard tensile specimen specification of ISO 527-2 "Determination of Tensile Properties of Plastics"; wherein, a support 1.1 with a diameter of 2.9mm and a height of 2.4cm is provided on the bottom mold 1, and a limiting hole 2.1 with a diameter of 3.1mm matching the support column is provided on the N-1 stacking molds 2. The N-1 stacking molds 2 are stably connected to the support 1.1 provided on the bottom mold 1 one by one through the limiting holes 2.1, and the fibers can pass through the limiting holes 1.2, 1.3, 2.2, and 2.3 on the long side and short side of the bottom mold 1 and the N-1 stacking molds 2 in turn to prepare a composite material with a stable integrated structure. The limiting holes 1.2 and 2.2 are aligned with the holes for inserting fibers, and the fiber-reinforced composite material of the stacking mold is prepared at 0°; the limiting holes 1.3 and 2.3 are aligned with the holes for inserting fibers, and the fiber-reinforced composite material of the stacking mold is prepared at 90°; the limiting holes 1.3 and 2.3 correspond to 1.2 and 2.2 respectively, and the arrangement spacing is arranged according to the geometric characteristics in three ways: a, b, and c. The stacking effect is as follows Fig.14 ; Among them, the limiting holes 1.3 and 2.3 of method a correspond to 1.2 and 2.2 respectively, and the spacing is equidistant. After the fiber is inserted into the empty space, Fig.10 Meet the ±45° laminated mold fiber reinforced composite material preparation; b mode limit holes 1.3, 2.3 arrangement spacing is √3 times the limit holes 1.2, 2.2 arrangement spacing, after inserting the fiber into the empty space Fig.11 Meet the ±30° laminated mold fiber reinforced composite material preparation; c mode limit holes 1.2, 2.2 arrangement spacing is √3 times the limit holes 1.3, 2.3 arrangement spacing, after inserting the fiber into the empty space Fig.12 The preparation of fiber-reinforced composite materials that meet the ±60° stacking mold can prepare fiber-reinforced composite materials with more directional arrangements if the non-aligned holes are inserted into the fibers. By controlling the fiber insertion method and the number and sequence of stacking in the three methods of a, b, and c, adding the matrix material and curing layer by layer, a multi-directional stacking hole-shaped fiber-reinforced composite material can be formed.

[0057] Fiber-reinforced composite material mold combination of Example 8 of the present invention Figure 8-Figure 9 , Figure 10-12 , Fig.14, N interconnected sub-molds include: 1 bottom mold 1 with a thickness of 2mm and N-1 stacking molds 2 with a thickness of 2mm, with mold holes 4 set in the center of the molds respectively, and the mold holes 4 are the standard tensile specimen specifications of ISO 527-2 "Determination of Tensile Properties of Plastics"; wherein, 1 bottom mold 1 is provided with a support 1.1 with a diameter of 2.9mm and a height of 2.4cm, and N-1 stacking molds 2 are provided with limiting holes 2.1 with a diameter of 3.1mm for matching support columns, and N-1 stacking molds 2 are stably connected to the support 1.1 set on the bottom mold 1 one by one through the limiting holes 2.1, and the fibers can pass through the limiting holes 1.2, 1.3, 2.2, and 2.3 on the long side and short side of the bottom mold 1 and the N-1 stacking molds 2 in turn, so that the composite material has a stable integrated structure. Assuming that the spacing between the limiting holes 1.2 and 2.2 is X, and the arrangement method is B, such as Fig.16 The spacing between the limit holes 1.3 and 2.3 is √3 / 3X,X,√3X from the 0 point, and the arrangement method is A,B,C continuous multi-holes such as Fig.15 , a multi-directional laminated pore-shaped fiber-reinforced composite material can be formed by simply controlling the fiber insertion method and adding the matrix material for layer-by-layer solidification.

[0058] The fiber-reinforced composite material mold of Example 9 of the present invention is combined with Figure 17-Figure 18 , Figure 10-12 , Fig.14 The N interconnected sub-molds include: a bottom mold 1 with a thickness of 2mm and N-1 stacking molds 2 with a thickness of 2mm, each of which has a mold hole 4 in the center, and the mold hole 4 is a standard tensile specimen specification of ISO 527-2 "Determination of Tensile Properties of Plastics"; wherein, a support 1.1 with a diameter of 2.9mm and a height of 2.4cm is provided on the bottom mold 1, and a limiting hole 2.1 with a diameter of 3.1mm matching the support column is provided on the N-1 stacking molds 2. The N-1 stacking molds 2 are stably connected to the support 1.1 provided on the bottom mold 1 one by one through the limiting holes 2.1. The N interconnected sub-molds further include: a plurality of adjustment molds 3 with mold holes in the shape of small rectangles, and the stress and strain of the composite material are adjusted inside the composite material by setting the adjustment mold with small rectangles 3.4 to relieve stress concentration. The fiber can pass through the bottom mold 1, the stacking mold 2, and the adjustment mold 3 in sequence. The long side and short side limit holes 1.2, 1.3, 2.2, 2.3, 3.2, and 3.3 are arranged on the side of the bottom mold 1, the stacking mold 2, and the adjustment mold 3. The composite material is stable in structure. The limit holes 1.2 and 2.2 are inserted into the positioning holes to prepare the fiber-reinforced composite material at 0°. The limit holes 1.3 and 2.3 are inserted into the positioning holes to prepare the fiber-reinforced composite material at 90°. The limit holes 1.3 and 2.3 correspond to 1.2 and 2.2 respectively. The arrangement spacing is arranged according to the geometric characteristics in three ways: a, b, and c. The stacking effect is as follows Fig.14; Among them, the limiting holes 1.3 and 2.3 of method a correspond to 1.2 and 2.2 respectively, and the spacing is equidistant. After the fiber is inserted into the empty space, Fig.10 Meet the ±45° laminated mold fiber reinforced composite material preparation; b mode limit holes 1.3, 2.3 arrangement spacing is √3 times the limit holes 1.2, 2.2 arrangement spacing, after inserting the fiber into the empty space Fig.11 Meet the ±30° laminated mold fiber reinforced composite material preparation; c mode limit holes 1.2, 2.2 arrangement spacing is √3 times the limit holes 1.3, 2.3 arrangement spacing, after inserting the fiber into the empty space Fig.12 The preparation of fiber-reinforced composite materials that meet the ±60° stacking mold can prepare fiber-reinforced composite materials with more directional arrangements if the non-aligned holes are inserted into the fibers. By controlling the fiber insertion method and the number and sequence of stacking in the three methods of a, b, and c, adding the matrix material and curing layer by layer, a multi-directional stacking center-hole fiber-reinforced composite material can be formed.

[0059] The fiber-reinforced composite material mold of embodiment 10 of the present invention is combined with Figure 17-Figure 18 , Figure 10-12 , Fig.14 , Fig.19 The N interconnected sub-molds include: a bottom mold 1 with a thickness of 2mm and N-1 stacking molds 2 with a thickness of 2mm, each of which has a mold hole 4 in the center, and the mold hole 4 is a standard tensile specimen specification of ISO 527-2 "Determination of Tensile Properties of Plastics"; wherein, a support 1.1 with a diameter of 2.9mm and a height of 2.4cm is provided on the bottom mold 1, and a limiting hole 2.1 with a diameter of 3.1mm matching the support column is provided on the N-1 stacking molds 2. The N-1 stacking molds 2 are stably connected to the support 1.1 provided on the bottom mold 1 one by one through the limiting holes 2.1. The N interconnected sub-molds further include: a plurality of adjustment molds 3 with mold holes in the shape of small rectangles, and the stress and strain of the composite material are adjusted inside the composite material by setting the adjustment mold with small rectangles 3.4 to relieve stress concentration. The fibers can sequentially pass through the limiting holes 1.2, 1.3, 2.2, 2.3, 3.2, and 3.3 on the long and short sides of the bottom mold 1, the stacking mold 2, and the adjustment mold 3. Each of the 1mm limiting holes 1.2, 1.3, 2.2, 2.3, 3.2, and 3.3 is provided with a liquid blocking wall 1.4 with a thickness of 1-2mm on the inner side to prevent the low-viscosity matrix material from overflowing. The limiting holes 1.2 and 2.2 are aligned with the holes to insert the fibers, and the fiber-reinforced composite materials of the stacking mold are prepared at 0°; the limiting holes 1.3 and 2.3 are aligned with the holes to insert the fibers, and the fiber-reinforced composite materials of the stacking mold are prepared at 90°; the limiting holes 1.3 and 2.3 correspond to 1.2 and 2.2 respectively, and the arrangement spacing is arranged according to the geometric characteristics in three ways of a, b, and c. The stacking effect is as follows Fig.14; Among them, the limiting holes 1.3 and 2.3 of method a correspond to 1.2 and 2.2 respectively, and the spacing is equidistant. After the fiber is inserted into the empty space, Fig.10 Meet the ±45° laminated mold fiber reinforced composite material preparation; b mode limit holes 1.3, 2.3 arrangement spacing is √3 times the limit holes 1.2, 2.2 arrangement spacing, after inserting the fiber into the empty space Fig.11 Meet the ±30° laminated mold fiber reinforced composite material preparation; c mode limit holes 1.2, 2.2 arrangement spacing is √3 times the limit holes 1.3, 2.3 arrangement spacing, after inserting the fiber into the empty space Fig.12 The preparation of fiber-reinforced composite materials that meet the ±60° stacking mold can prepare fiber-reinforced composite materials with more directional arrangements if the non-aligned holes are inserted into the fibers. By controlling the fiber insertion method and the number and sequence of stacking in the three methods of a, b, and c, adding the matrix material and curing layer by layer, a multi-directional stacking center-hole fiber-reinforced composite material can be formed.

[0060] The fiber-reinforced composite material mold of Example 11 of the present invention, combined with Figure 20-23 , Figure 10-12 , Fig.14 , the fiber reinforced composite material mold uses resin material, including: N interconnected sub-molds 1; wherein, the sub-mold 1 is a rectangular mold with a thickness of 2mm and a mold hole 4 is set in the center; the side of the long side of the sub-mold 1 is distributed with a plurality of square limiting grooves 3 with a side length of 1mm arranged in a line. The short side is respectively distributed with a plurality of circular limiting holes 2 with a diameter of 1mm arranged in a line. The limiting hole 2 is inserted into the positioning hole of the fiber, and the fiber reinforced composite material of the laminated mold is prepared at 0°; the limiting hole 3 is inserted into the positioning hole of the fiber, and the fiber reinforced composite material of the laminated mold is prepared at 90°; the spacing between the limiting holes 3 and 2 is arranged according to the geometric characteristics in three ways of a, b, and c. The stacking effect is as follows Fig.14 Among them, the spacing of the limiting holes 3 and 2 in mode a is equidistant, and the fiber is inserted into the empty space. Fig.10 Meet the ±45° laminated mold fiber reinforced composite material preparation; b mode limit hole 3 arrangement spacing is √3 times the limit hole 2 arrangement spacing, after inserting the fiber into the empty space Fig.11 Meet ±30° laminated mold fiber reinforced composite material preparation; c mode limit hole 2 arrangement spacing is √3 times the limit hole 3 arrangement spacing, after inserting the fiber into the empty space Fig.12The preparation of fiber-reinforced composite materials that meet the ±60° stacking mold requirements can be prepared. If the fibers are inserted into non-aligned holes, fiber-reinforced composite materials arranged in more directions can be prepared. The edge of a square limiting groove 3 with a side length of 1mm has two corresponding circular limiting holes 2 with a diameter of 1mm. The fibers cross through the circular limiting holes 2.1 and 2.2 with a diameter of 1mm to lock and fix the fibers. N sub-molds 1 are magnetic composite materials that are interconnected by magnetic force. By controlling the fiber insertion method and the number and order of stacking in the three methods of a, b, and c, a multi-directional laminated center-hole fiber-reinforced composite material can be formed by adding the matrix material and curing it layer by layer.

[0061] Fiber-reinforced composite material mold combination of embodiment 12 of the present invention Fig. 22 , Figure 10-12 , Fig.14 , the fiber reinforced composite material mold uses resin material, including: N interconnected sub-molds 1; wherein, the sub-mold 1 is a rectangular mold with a thickness of 2mm and a mold hole 4 is set in the center; each sub-mold 1 is a rectangular mold with a thickness of 2mm and a mold hole 4 is set in the center of the mold, which are different and the size is an integral gradient change; a plurality of limiting holes 3 with a diameter of 1mm arranged in a line are distributed on the side of the long side of the sub-mold 1. A plurality of limiting holes 2 with a diameter of 1mm arranged in a line are distributed on the side of the short side. The limiting hole 2 is used to insert the fiber into the positioning hole, and the fiber reinforced composite material of the laminated mold is prepared at 0°; the limiting hole 3 is used to insert the fiber into the positioning hole, and the fiber reinforced composite material of the laminated mold is prepared at 90°; the spacing between the limiting holes 3 and 2 is arranged according to the geometric characteristics in three ways of a, b, and c, and the stacking effect is as follows Fig.14 Among them, the spacing of the limiting holes 3 and 2 in mode a is equidistant, and the fiber is inserted into the empty space. Fig.10 Meet the ±45° laminated mold fiber reinforced composite material preparation; b mode limit hole 3 arrangement spacing is √3 times the limit hole 2 arrangement spacing, after inserting the fiber into the empty space Fig.11 Meet ±30° laminated mold fiber reinforced composite material preparation; c mode limit hole 2 arrangement spacing is √3 times the limit hole 3 arrangement spacing, after inserting the fiber into the empty space Fig.12 The preparation of fiber-reinforced composite materials that meet the ±60° stacking mold can prepare fiber-reinforced composite materials with more directions if the non-aligned holes are inserted into the fibers. N sub-molds 1 are magnetic composite materials that are connected to each other by magnetic force. By controlling the fiber insertion method and the number and sequence of stacking in three methods a, b, and c, the matrix material is added and solidified layer by layer to form a cylindrical fiber-reinforced composite material with a multi-directional stacked central hole.

[0062] Fiber-reinforced composite material mold combination of Example 13 of the present invention Fig.23 , Figure 10-12 , Fig.14, the fiber reinforced composite material mold uses resin material, including: N interconnected sub-molds 1; wherein, the sub-mold 1 is a rectangular mold with a thickness of 2mm and a mold hole 4 is set in the center; each sub-mold 1 is a rectangular mold with a thickness of 2mm and a mold hole 4 is set in the center of the mold, which are different and the size is an integral gradient change; a plurality of limiting holes 3 with a diameter of 1mm arranged in a line are distributed on the side of the long side of the sub-mold 1. A plurality of limiting holes 2 with a diameter of 1mm arranged in a line are distributed on the side of the short side. The limiting hole 2 is used to insert the fiber into the positioning hole, and the fiber reinforced composite material of the laminated mold is prepared at 0°; the limiting hole 3 is used to insert the fiber into the positioning hole, and the fiber reinforced composite material of the laminated mold is prepared at 90°; the spacing between the limiting holes 3 and 2 is arranged according to the geometric characteristics in three ways of a, b, and c, and the stacking effect is as follows Fig.14 Among them, the spacing of the limiting holes 3 and 2 in mode a is equidistant, and the fiber is inserted into the empty space. Fig.10 Meet the ±45° laminated mold fiber reinforced composite material preparation; b mode limit hole 3 arrangement spacing is √3 times the limit hole 2 arrangement spacing, after inserting the fiber into the empty space Fig.11 Meet ±30° laminated mold fiber reinforced composite material preparation; c mode limit hole 2 arrangement spacing is √3 times the limit hole 3 arrangement spacing, after inserting the fiber into the empty space Fig.12 The preparation of fiber-reinforced composite materials that meet the ±60° stacking mold can prepare fiber-reinforced composite materials with more directions if the non-aligned holes are inserted into the fibers. N sub-molds 1 are magnetic composite materials that are connected to each other by magnetic force. By controlling the fiber insertion method and the number and sequence of stacking in three methods a, b, and c, adding the matrix material and curing layer by layer, a multi-directional stacked center-hole spherical fiber-reinforced composite material can be formed.

[0063] Embodiment 14 of the present invention uses a mold to prepare a fiber-reinforced composite material Fig.24 , using the method for preparing a fiber-reinforced composite material using the mold of the above-mentioned embodiments 1-8 and 10, the fibers are selected in sequence to determine that the fiber volume fraction is 30%, 40%, and 50%.

[0064] Select a suitable hole position to insert the fiber into the first layer sub-mold or the bottom mold. If the mold of Example 10 is used, the fiber needs to be passed through the liquid-blocking wall with a hard material such as a needle. Select a photosensitive resin as the matrix material, observe the resin fluidity and solidify it, and judge whether it can be semi-solidified. If it is judged to be no, return to reselect the photosensitive resin. If it is judged to be yes, select a suitable hole position to insert the fiber into the second layer sub-mold, stack the second layer mold, add the matrix material to the mold and solidify it. Repeat until selecting a suitable hole position to insert the fiber into the fifth layer sub-mold, stack the fifth layer sub-mold, add the matrix material to the mold and solidify it. By this method, a plurality of [0° / 90° / 0° / 90° / 0°], [30° / 60° / 90° / -60° / -30°], and [45° / 90° / 0° / 90° / -45°] 5-layer arranged carbon fiber reinforced photosensitive resin composite parts are prepared.

[0065] Embodiment 15 of the present invention uses the method for preparing a fiber-reinforced composite material by using the mold of the above embodiments 9 and 10 in combination with Fig.25 , select the carbon fiber T800 of Japan Toray Company and the E8 glass fiber of China Jushi Company in turn, and determine the fiber volume fraction to be G / C(%) 10% F(%) 35%; G / C(%) 40% F(%) 45%; G / C(%) 70% F(%) 65% etc., and the fiber arrangement is ([0° C / 0° G / 0° C / 0° G ]、[0° C / 90° G / 90° C / 0° G ] S ) etc. After selecting the appropriate hole position to insert the T800 and E8 fibers into the sub-mold, (if the mold of Example 10 is used, the fibers need to be passed through the liquid-blocking wall with a hard material such as a needle to determine whether they need to be oriented.) If it is determined to be no, the sub-molds are stacked, and the matrix material is added to the mold and cured; if it is determined to be yes, the fiber ±60° orientation adjustment layer is stacked, the orientation adjustment layer is added with the matrix material and cured, and then the sub-molds are stacked, and the matrix material is added to the mold and cured until the curing is completed. The 12 layers [0°] containing two layers of ±60° orientation adjustment layers are stacked. C / 90° G / 60° C / -60° C / 90° C / 0° G ] S Through tensile comparison of T800 / E8 hybrid fiber reinforced resin composite parts, it was found that the orientation effect of using carbon fiber with higher modulus in the orientation layer is better than that of using glass fiber with smaller modulus.

[0066] Embodiment 16 of the present invention uses a mold to prepare a fiber-reinforced composite material Fig.24 , a method for preparing a fiber-reinforced composite material using the molds of the above-mentioned embodiments 1-8 and 10, selecting fibers A-glass fiber, C-glass fiber and E9 (S-glass fiber) in turn, determining that the fiber volume fraction is 30%, 40%, 50%, and the fiber arrangement is [0° / 0° / 0° / 0° / 0° / 0°], selecting a suitable hole position to insert the fiber into the first layer of the sub-mold or the bottom mold, (if the mold of embodiment 10 is used, the fiber needs to be passed through the liquid-blocking wall with a hard material such as a needle to determine whether it needs to be adjusted,) selecting the matrix material as a hydrogel, observing the fluidity of the hydrogel and curing it, and determining whether it can be semi-cured. If it is determined to be no, returning to reselect the hydrogel, if it is determined to be yes, selecting a suitable hole position to insert the fiber into the second layer of the sub-mold, stacking the second layer of the mold, adding the matrix material to the mold and curing it, repeating until selecting a suitable hole position to insert the fiber into the sixth layer of the sub-mold, stacking the sixth layer of the sub-mold, adding the matrix material to the mold and curing it, and preparing a glass fiber reinforced hydrogel composite material.

[0067] Embodiment 17 of the present invention uses a mold to prepare a fiber-reinforced composite material Fig.24 , a method for preparing a fiber-reinforced composite material using the molds of the above-mentioned embodiments 1-8 and 10, selecting fiber T800 carbon fiber in turn, determining that the fiber volume fraction is 30%, 40%, 50%, and the fiber arrangement mode is [0° / 0° / 0° / 0° / 0° / 0°], selecting a suitable hole position to insert the fiber into the first layer sub-mold or the bottom mold, (if the mold of embodiment 10 is used, the fiber needs to be passed through the liquid barrier wall with a hard material such as a needle to determine whether it needs to be adjusted,) selecting the matrix material as a hydrogel, observing the fluidity of the hydrogel and curing it, and determining whether it can be semi-cured. If it is determined to be no, returning to reselect the hydrogel, if it is determined to be yes, selecting a suitable hole position to insert the fiber into the second layer sub-mold, stacking the second layer mold, adding the matrix material to the mold and curing it, repeating until selecting a suitable hole position to insert the fiber into the sixth layer sub-mold, stacking the sixth layer sub-mold, adding the matrix material to the mold and curing it, and preparing a glass fiber reinforced conductive hydrogel composite material.

[0068] In another embodiment of the present invention, N interconnected sub-molds include: a bottom mold 1 with a thickness of 1mm and N-1 stacking molds 2 with a thickness of 1mm, with mold holes 4 respectively set in the center of the molds; wherein, a support 1.1 with a diameter of 1.9mm and a height of 2cm is set on the bottom mold 1, and a limiting hole with a diameter of 2.1mm matching the support column is set on the N-1 stacking molds 2, and limiting holes 1.2, 1.3, 2.2, and 2.3 with a diameter of 500um on the long side and short side of the N-1 stacking molds 2. The adjustment mold 3 has a thickness of 1mm and 500um limiting holes 3.2 and 3.3 on the long side and short side. The present invention does not impose a specific numerical limit on the thickness of the sub-mold. The mold thickness can be 0.5mm-4mm, and the diameter of the limiting holes 1.2, 1.3, 2.2, 2.3, 3.2, and 3.3 can be 10um-2mm. The thickness of the liquid-blocking wall measured inside each limiting hole 1.2, 1.3, 2.2, 2.3, 3.2, and 3.3 can be 0.1-2mm thick. It can be considered that all sizes that can achieve the purpose of preventing the overflow of low-viscosity matrix materials and can be prepared are within the protection scope of the present invention. The bottom mold 1 is provided with a support rod 1.1 with a diameter of 1mm-4mm and a height greater than 1cm. The size of this mold is enlarged N times, and N can be an exponential multiple. Similar molds that reduce the difficulty of production are all within the protection scope of the present invention. All size embodiments that can meet the requirements of the present invention and can be prepared are within the protection scope of the present invention.

[0069] In another embodiment of the present invention, N sub-molds are interconnected; wherein, the hole types of the limiting holes 1.2, 1.3, 2.2, 2.3, 3.2, and 3.3 on the long side and short side of the sub-mold, bottom mold, stacking mold, and adjustment mold may include but are not limited to circular, rectangular, square, diamond, continuous long gradient through holes and special shapes, etc.; the hole types of the limiting holes 1.2, 1.3, 2.2, 2.3, 3.2, and 3.3 may include but are not limited to full through holes, half through holes, through hole grooves, etc. It can be considered that all embodiments that meet the requirements of the present invention and can be prepared are within the protection scope of the present invention.

[0070] In another embodiment of the present invention, N sub-molds are interconnected; wherein, the mold hole arranged in the center of the sub-mold can be circular, elliptical, rectangular, square, rhombus or special-shaped, and the mold holes arranged in the centers of the N interconnected sub-molds can be different. The integral form of the edge size of the mold hole arranged from the center sub-mold to the centers of the adjacent sub-molds on both sides decreases arithmetically, so that a hollow cavity of various shapes is formed in the center of the mold, including but not limited to a sphere, a cylinder, an ellipsoid, a rhombus and a special-shaped body, etc. The special-shaped body can be in the shape of an orthopedic bone screw, a hollow blood vessel, a meniscus, etc. It can be considered that all embodiments that meet the requirements of the present invention and can be prepared are within the protection scope of the present invention.

[0071] In another embodiment of the present invention, the sub-mold can be polyvinyl chloride (PVC), polypropylene (PP), polyethylene terephthalate (PET), cycloolefin polymer (COP), polyethylene naphthalate (PEN), triacetate film (TAC), polycarbonate (PC), polystyrene (PS) or polyimide (Polyimide), etc. It can be considered that all embodiments that meet the requirements of the present invention are within the protection scope of the present invention.

[0072] In another embodiment of the present invention, the matrix material may also be various photosensitive resins, heat-sensitive resins, chemically cross-linked thermosetting resins, etc., including but not limited to thermosetting phenolic resins, thermosetting epoxy resins, photopolymerizable unsaturated polyesters, photopolymerizable acrylic resins, cyclopentane acrylic resins, polyether acrylic resins, spirocyclic acrylic resins, polyurethanes, etc. It can be considered that based on the molecular structure and through other means, any material that can undergo a physical state change through light, heat and chemical cross-linking, and the embodiments that can be prepared to meet the requirements of the present invention are all within the protection scope of the present invention.

[0073] Photosensitive hydrogels, thermosensitive hydrogels, chemically cross-linked hydrogels, etc., including but not limited to cellulose-based hydrogels, monomer cross-linking such as methacryloyl group-modified gelatin, copolymer hydrogels such as hyaluronic acid, HAMA, GelMA copolymer hydrogels, tyramine functionalized alginate hydrogels, polyethylene glycol diacrylate hydrogels. It can be considered that based on the molecular structure and through other means, any hydrogel or composite hydrogel that can undergo a physical state change through light, heat and chemical cross-linking, and the embodiments that can be prepared to meet the requirements of the present invention are within the scope of protection of the present invention.

[0074] In another embodiment of the present invention, the reinforcing fiber can also be carbon fiber, glass fiber, aramid fiber, boron fiber, bamboo fiber, ultra-high molecular weight polyethylene fiber, metal fiber, silver fiber, copper fiber, steel fiber, alloy fiber, memory alloy fiber, Ti-Ni alloy fiber, memory polymer fiber, etc. All fiber materials that can be used by this mold are within the protection scope of the patent of this invention.

[0075] In another embodiment of the present invention, the fibers can also be interlaced and cured between several layers of sub-molds to form a fiber-reinforced composite material with a mechanical component in the Z-axis direction, and a nonlinear fiber-reinforced composite material prepared by fiber interaction, such as a fiber distributed in a wave-like or zigzag manner in the body. All methods of preparing fiber materials by this mold are within the scope of protection of the present invention patent.

[0076] In addition, it should be noted that the combination of the various technical features in this case is not limited to the combination described in the claims of this case or the combination described in the specific embodiments. All technical features recorded in this case can be freely combined or combined in any way unless there is a contradiction between them.

[0077] It should be noted that the above examples are only specific embodiments of the present invention, and the present invention is obviously not limited to the above examples, and there are many similar variations. All variations directly derived or associated from the contents disclosed by the technicians in this field should fall within the protection scope of the present invention.

[0078] The above are only preferred embodiments of the present invention and are not intended to limit the protection scope of the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A fiber reinforced composite material mold, characterized in that: include: N interconnected sub-molds; wherein the sub-mold is a rectangular mold with a mold hole in the center; and a plurality of limiting holes arranged in a line are distributed on the long side and short side of the sub-mold.

2. The fiber reinforced composite material mold according to claim 1, characterized in that: The sub-moulds are made of magnetic composite materials, and the sub-moulds are connected by magnetic force.

3. The fiber reinforced composite material mold according to claim 1, characterized in that: The N interconnected sub-molds further include: 1 bottom mold and N-1 stacking molds; wherein, the 1 bottom mold is provided with a support, the N-1 stacking molds are provided with limiting holes matching the support columns, and the N-1 stacking molds are mechanically connected to the support provided on the bottom mold through the limiting holes.

4. The fiber reinforced composite material mold according to claim 2 or 3, characterized in that: The multiple limiting holes arranged in a line on the long side of the sub-mold are grooved semi-through holes, and the multiple limiting holes arranged in a line on the short side are closed inner through holes; or the multiple limiting holes arranged in a line on the long side are closed inner through holes, and the multiple limiting holes arranged in a line on the short side are grooved semi-through holes; each of the grooved semi-through holes has at least two closed inner through holes on each side edge. 5 . The fiber reinforced composite material mold according to claim 4 , wherein a liquid blocking wall is arranged inside the plurality of in-line limiting holes respectively distributed on the long side surface and the short side surface of the sub-mold.

6. The fiber reinforced composite material mold according to claim 5, characterized in that: The N interconnected sub-molds have multiple in-line limiting holes distributed on the long side surfaces and multiple in-line limiting holes on the short side surfaces, which are arranged in three modes a, b, and c according to geometric features; wherein the modes a, b, and c respectively meet the requirements of ±45°, ±30°, and ±60° for the preparation of laminated fiber-reinforced composite materials.

7. The fiber reinforced composite material mold according to claim 6, characterized in that: The N interconnected sub-molds further include: a plurality of direction-adjusting molds whose mold holes are small rectangular shapes.

8. The fiber reinforced composite material mold according to claim 7, characterized in that: The mold hole arranged at the center of the bottom mold and the mold hole arranged at the center of the stacking mold are of different shapes.

9. The fiber reinforced composite material mold according to claim 8, characterized in that: The N interconnected sub-molds are made of transparent resin and / or composite material.

10. A method for preparing a fiber-reinforced composite material using the mold, characterized in that: Select the fibers in sequence, determine the fiber volume fraction and fiber arrangement, select the appropriate hole position to insert the fibers into the first layer of the sub-mold or the bottom mold, select the matrix material, observe the fluidity of the matrix material and solidify it, and determine whether it can be semi-solidified. If it is judged as no, return to reselect the matrix material. If it is judged as yes, select the appropriate hole position to insert the fibers into the second layer of the sub-mold, and then stack the second layer of the sub-mold, add the matrix material to the mold and solidify it, and repeat until the appropriate hole position is selected to insert the fibers into the Nth layer of the sub-mold, stack the Nth layer of the sub-mold, add the matrix material to the mold and solidify it.

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