Manufacturing method of multi-component resin layer fiber reinforced metal laminate structure

Abstract

The invention belongs to the technical field of composite material forming, and provides a multi-element resin layer fiber reinforced metal laminate structure manufacturing method which comprises the operation steps that S1, an inner-layer aluminum alloy thin plate and an outer-layer aluminum alloy thin plate are machined; s2, a thermosetting glass fiber prepreg and thermoplastic resin are manufactured and cut, the thermoplastic resin is bonded to the two sides of the thermosetting glass fiber prepreg correspondingly to form a composite structure prepreg, and the composite structure prepreg is laid and pasted between the inner-layer aluminum alloy thin plate and the outer-layer aluminum alloy thin plate to form a composite laminated plate; s3, putting the composite material laminated plate into a vacuum bag system; and S4, the vacuum bag system containing the composite material laminated plate is put into a thermocuring furnace, thermocuring is carried out while the vacuum bag system is vacuumized, and the multi-element resin layer fiber reinforced metal laminated plate structure is formed. The thermoplastic resin is combined with the metal plate layer, so that the paving difficulty of the fiber-reinforced metal laminate is reduced, and the production efficiency is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of composite material forming, and in particular relates to a method for manufacturing a multi-component resin layer fiber reinforced metal layer plate structure. Background Art

[0002] Fiber reinforced metal laminates are laminates made by bonding two or more metal sheets and reinforcing fibers sandwiched between the metal sheets using an adhesive.

[0003] At present, when manufacturing fiber-reinforced metal laminates, at room temperature, due to the certain viscosity of thermosetting glass fiber prepreg, when thermosetting glass fiber prepreg and metal sheet are bonded, if the bonding effect is not good, the metal sheet and the thermosetting glass fiber prepreg need to be separated first, and then re-bonded. The re-bonding process will cause the damage of the fiber bundle, resulting in increased difficulty in the production of fiber-reinforced metal laminates. At room temperature, thermoplastic resins have no adhesiveness. Therefore, if thermoplastic resins are used in the existing production of fiber-reinforced metal laminates, the production difficulty of fiber-reinforced metal laminates will be greatly reduced and production efficiency will be improved. Summary of the invention

[0004] The purpose of the present invention is to provide a method for manufacturing a multi-resin layer fiber reinforced metal laminate structure to solve the above problems, achieve the purpose of combining thermoplastic resin with metal plate layers, reduce the difficulty of laying fiber reinforced metal laminates, and improve production efficiency.

[0005] To achieve the above object, the present invention provides the following solution: a method for manufacturing a multi-layer resin fiber reinforced metal laminate structure, the operating steps comprising:

[0006] S1. Processing the inner aluminum alloy sheet and the outer aluminum alloy sheet according to the required dimensions;

[0007] S2. Making and cutting thermosetting glass fiber prepreg and thermoplastic resin according to required sizes, respectively bonding thermoplastic resin on both sides of the thermosetting glass fiber prepreg to form a composite structure prepreg, and paving the composite structure prepreg between the inner aluminum alloy sheet and the outer aluminum alloy sheet to form a composite material laminate;

[0008] S3, placing the composite laminate into a vacuum bag system;

[0009] S4. Place the vacuum bag system containing the composite laminate into a heat curing furnace, and perform heat curing while the vacuum bag system is evacuated to form a multi-resin layer fiber-reinforced metal laminate structure.

[0010] Preferably, in step S1, after the inner aluminum alloy sheet and the outer aluminum alloy sheet are processed, the roughness of the inner surface of the inner aluminum alloy sheet and the inner surface of the outer aluminum alloy sheet are increased by chemical corrosion or mechanical processing passivation treatment to increase the contact area with the thermoplastic resin.

[0011] Preferably, in step S3, the vacuum bag system includes a molding template, and a non-porous isolation film and glass fiber yarn are wrapped in sequence on the surface of the composite laminate and then placed on the molding template, and then a pressing plate, a breathable felt and a vacuum bag are laid in sequence on the top of the glass fiber yarn. The edge of the vacuum bag is sealed against the molding template, and a vacuum pump interface for connecting a vacuum pump is provided on the vacuum bag.

[0012] Preferably, in step S4, the thermal curing time is 3 hours to 9 hours, and the thermal curing temperature is 50° C. to 80° C.

[0013] Preferably, in step S4, the vacuum degree between the vacuum bag and the forming template during the thermal curing process is -0.1 MPa.

[0014] Preferably, in step S2, the thickness of the thermosetting glass fiber prepreg ranges from 0.2 mm to 0.3 mm, and the thickness of the thermoplastic resin ranges from 0.1 mm to 0.2 mm.

[0015] Preferably, the thermoplastic resin may be selected from phenolic resin, BMI resin, polyethylene or polypropylene.

[0016] Preferably, in step S1, the inner aluminum alloy sheet and the outer aluminum alloy sheet are overlapped and plastically formed as a whole at one time, and then the inner aluminum alloy sheet and the outer aluminum alloy sheet are separated to obtain an inner aluminum alloy sheet and an outer aluminum alloy sheet with matching shapes.

[0017] Preferably, in step S2, when the structures of the inner aluminum alloy sheet and the outer aluminum alloy sheet are complex, a layering method is adopted to achieve integrated manufacturing of the inner aluminum alloy sheet, the outer aluminum alloy sheet, the thermosetting glass fiber prepreg and the thermoplastic resin.

[0018] Compared with the prior art, the present invention has the following advantages and technical effects: the present invention reasonably avoids the problem that the thermosetting glass fiber prepreg has a certain viscosity at room temperature, and when the thermosetting glass fiber prepreg is bonded to the metal sheet, if the bonding effect is not good, the fiber bundles will be damaged when re-bonding. By utilizing the characteristic that thermoplastic resin has no adhesion at room temperature, the thermoplastic resin is distributed on both sides of the thermosetting glass fiber prepreg instead of combining it with the metal layer, making it easier to lay the laminate, thereby reducing the production difficulty of the fiber-reinforced metal laminate and improving the production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 It is a schematic structural diagram of a multi-layer resin fiber reinforced metal laminate of the present invention;

[0021] Figure 2 It is a schematic diagram of the vacuum bag system of the present invention;

[0022] Figure 3 This is a flow chart of integrated plastic forming of the inner aluminum alloy sheet and the outer aluminum alloy sheet of the present invention;

[0023] Among them, 1. Thermosetting glass fiber prepreg; 2. Thermoplastic resin; 3. Inner layer aluminum alloy sheet; 4. Outer layer aluminum alloy sheet; 5. Forming template; 6. Glass fiber yarn; 7. Non-porous isolation membrane; 8. Press plate; 9. Breathable felt; 10. Vacuum bag; 11. Vacuum pump interface; 12. Composite laminate; 13. Sealing tape. DETAILED DESCRIPTION

[0024] 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.

[0025] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0026] Reference Figure 1-Figure 3 The present invention provides a method for manufacturing a multi-layer resin fiber reinforced metal laminate structure, the operating steps comprising:

[0027] S1, processing the inner aluminum alloy sheet 3 and the outer aluminum alloy sheet 4 according to the required external dimensions;

[0028] S2, manufacturing and cutting a thermosetting glass fiber prepreg 1 and a thermoplastic resin 2 according to required sizes, bonding the thermoplastic resin 2 to both sides of the thermosetting glass fiber prepreg 1 to form a composite structure prepreg, and paving the composite structure prepreg between the inner aluminum alloy sheet 3 and the outer aluminum alloy sheet 4 to form a composite material laminate 12;

[0029] S3, placing the composite laminate 12 into a vacuum bag system;

[0030] S4. Place the vacuum bag system containing the composite laminate 12 into a heat curing furnace, and perform heat curing while the vacuum bag system is evacuated. When the temperature returns to room temperature, the inner aluminum alloy sheet 3, the outer aluminum alloy sheet 4 and the composite structure prepreg form a dense integrated structure, forming a multi-resin layer fiber-reinforced metal laminate structure.

[0031] The main function of the thermoplastic resin 2 is to replace the thermosetting glass fiber prepreg 1 and bond with the inner aluminum alloy sheet 3 and the outer aluminum alloy sheet 4 by pre-paving on both sides of the thermosetting glass fiber prepreg 1, thereby avoiding the adhesion of the thermosetting glass fiber prepreg 1 at room temperature to the paving process. Through the direct contact between the aluminum alloy sheet and the thermoplastic resin 2, the paving situation can be conveniently adjusted in production to ensure the best paving effect. On the whole, the present invention reasonably avoids the problem that the thermosetting glass fiber prepreg has a certain viscosity at room temperature, and when the thermosetting glass fiber prepreg and the metal sheet are bonded, if the bonding effect is not good, the re-bonding will cause the damage of the fiber bundle. By utilizing the characteristic that the thermoplastic resin has no adhesion at room temperature, the thermoplastic resin is distributed on both sides of the thermosetting glass fiber prepreg instead of combining with the metal layer, making paving easier, thereby reducing the production difficulty of the fiber reinforced metal laminate and improving production efficiency.

[0032] To further optimize the solution, when cutting the thermosetting glass fiber prepreg 1, it is necessary to take it out and place it at room temperature for 6 hours. When the thermosetting glass fiber prepreg 1 is slightly sticky, the laying effect is best. Attention should be paid to the fiber direction when cutting and laying.

[0033] At the same time, the room temperature standing time of the thermosetting glass fiber prepreg 1 should not be too long to avoid excessive viscosity leading to difficulty in cutting.

[0034] According to a further optimization scheme, in step S1, after the inner aluminum alloy sheet 3 and the outer aluminum alloy sheet 4 are processed, the roughness of the inner surface of the inner aluminum alloy sheet 3 and the inner surface of the outer aluminum alloy sheet 4 are increased by chemical corrosion or mechanical processing passivation treatment to increase the contact area with the thermoplastic resin 2.

[0035] According to a further optimization scheme, after the inner surfaces of the inner aluminum alloy sheet 3 and the outer aluminum alloy sheet 4 are surface treated, adhesive is evenly applied to improve the bonding strength between the metal and the composite material (ie, the thermoplastic resin 2).

[0036] Further optimization scheme, such as Figure 2As shown, in step S3, the vacuum bag system includes a molding template 5, a non-porous isolation film 7 and a glass fiber yarn 6 are wrapped in sequence on the surface of the composite laminate 12 and then placed on the molding template 5, and then a pressing plate 8, a breathable felt 9 and a vacuum bag 10 are laid in sequence on the top of the glass fiber yarn 6, the edge of the vacuum bag 10 is sealed with the molding template 5, and a vacuum pump interface 11 for connecting a vacuum pump is provided on the vacuum bag 10.

[0037] In a further optimized solution, the surface of the composite laminate 12 is first coated with a release agent and then wrapped with a non-porous isolation film 7. The main function of the non-porous isolation film 7 is to prevent the air felt 9 from absorbing resin and thus affecting the quality of the final fiber-reinforced metal laminate.

[0038] For the fiber-reinforced metal laminate with edges and corners, it is necessary to wrap it as a whole with a non-porous isolation film 7 and glass fiber yarn 6 to prevent the workpiece from scratching the vacuum bag 10 during vacuuming.

[0039] According to a further optimized solution, the vacuum bag 10 and the forming template 5 are sealed and connected by a sealing tape 13 .

[0040] To further optimize the solution, epoxy resin is selected as the thermosetting resin in the thermosetting glass fiber prepreg.

[0041] According to a further optimized solution, in step S4, the thermal curing time is 3 h to 9 h, and the thermal curing temperature is 150° C. to 180° C.

[0042] To further optimize the solution, the curing temperature is determined according to the material composition of the specifically selected epoxy resin.

[0043] According to a further optimization scheme, in step S4, the vacuum degree between the vacuum bag 10 and the forming template 5 during the thermal curing process is -0.1 MPa.

[0044] like Figure 2 As shown, a vacuum bag 10 containing a composite laminate 12 is placed in an oven, a vacuum pump interface 11 and a built-in vacuum interface of the oven are connected, the vacuum pump is turned on, the vacuum degree in the vacuum bag 10 is evacuated to -0.1 MPa, and a heating program is set according to production requirements for curing.

[0045] According to a further optimized solution, in step S2, the thickness of the thermosetting glass fiber prepreg 1 is in the range of 0.2 mm to 0.3 mm, and the thickness of the thermoplastic resin 2 is in the range of 0.1 mm to 0.2 mm.

[0046] Changing the thickness of the thermoplastic resin 2 can improve the overall impact resistance of the multi-layered resin fiber reinforced metal laminate structure.

[0047] According to a further optimization scheme, the thermoplastic resin 2 may be selected from phenolic resin, BMI resin, polyethylene or polypropylene.

[0048] Further optimization scheme, such as Figure 3 As shown, in step S1, the inner aluminum alloy sheet 3 and the outer aluminum alloy sheet 4 are overlapped, and are first plastically formed as a whole at one time, and then the inner aluminum alloy sheet 3 and the outer aluminum alloy sheet 4 are separated to obtain the inner aluminum alloy sheet 3 and the outer aluminum alloy sheet 4 with matching shapes.

[0049] To further optimize the scheme, in step S2, when the structures of the inner aluminum alloy sheet 3 and the outer aluminum alloy sheet 4 are complex, a layering method is adopted to achieve integrated manufacturing of the inner aluminum alloy sheet 3, the outer aluminum alloy sheet 4, the thermosetting glass fiber prepreg 1 and the thermoplastic resin 2.

[0050] In the description of the present invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0051] The embodiments described above are only descriptions of the preferred modes of the present invention, and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should all fall within the protection scope determined by the claims of the present invention.

Claims

1. A method for manufacturing a multi-layer resin fiber reinforced metal laminate structure, characterized in that: The steps include: S1, processing the inner aluminum alloy thin plate (3) and the outer aluminum alloy thin plate (4) according to the required external dimensions; S2, manufacturing and cutting a thermosetting glass fiber prepreg (1) and a thermoplastic resin (2) according to required sizes, bonding the thermoplastic resin (2) to both sides of the thermosetting glass fiber prepreg (1) to form a composite structure prepreg, and paving the composite structure prepreg between an inner aluminum alloy sheet (3) and an outer aluminum alloy sheet (4) to form a composite material laminate (12); S3, placing the composite laminate (12) into a vacuum bag system; S4, placing the vacuum bag system containing the composite laminate (12) into a heat curing furnace, and performing heat curing while evacuating the vacuum bag system to form a multi-resin layer fiber-reinforced metal laminate structure.

2. The method for manufacturing a multi-layer resin fiber reinforced metal laminate structure according to claim 1, characterized in that: In step S1, after the inner aluminum alloy sheet (3) and the outer aluminum alloy sheet (4) are processed, the roughness of the inner surface of the inner aluminum alloy sheet (3) and the inner surface of the outer aluminum alloy sheet (4) are increased by chemical corrosion or mechanical processing passivation treatment to increase the contact area with the thermoplastic resin (2).

3. The method for manufacturing a multi-component resin layer fiber reinforced metal laminate structure according to claim 1, characterized in that: In step S3, the vacuum bag system includes a molding template (5), a non-porous isolation film (7) and a glass fiber yarn (6) are wrapped in sequence on the surface of a composite material laminate (12) and then placed on the molding template (5), and then a pressing plate (8), a breathable felt (9) and a vacuum bag (10) are laid in sequence on top of the glass fiber yarn (6), the edge of the vacuum bag (10) is sealed with the molding template (5), and a vacuum pump interface (11) for connecting a vacuum pump is provided on the vacuum bag (10).

4. The method for manufacturing a multi-component resin layer fiber reinforced metal laminate structure according to claim 1, characterized in that: In step S4, the thermal curing time is 3 hours to 9 hours, and the thermal curing temperature is 150° C. to 180° C.

5. The method for manufacturing a multi-component resin layer fiber reinforced metal laminate structure according to claim 3, characterized in that: In step S4, during the thermal curing process, the vacuum degree between the vacuum bag (10) and the forming template (5) is -0.1 MPa.

6. The method for manufacturing a multi-component resin layer fiber reinforced metal laminate structure according to claim 1, characterized in that: In step S2, the thickness of the thermosetting glass fiber prepreg (1) is in the range of 0.2 mm to 0.3 mm, and the thickness of the thermoplastic resin (2) is in the range of 0.1 mm to 0.2 mm.

7. The method for manufacturing a multi-component resin layer fiber reinforced metal laminate structure according to claim 1, characterized in that: The thermoplastic resin (2) can be selected from phenolic resin, BMI resin, polyethylene or polypropylene.

8. The method for manufacturing a multi-component resin layer fiber reinforced metal laminate structure according to claim 1, characterized in that: In step S1, the inner aluminum alloy sheet (3) and the outer aluminum alloy sheet (4) are stacked and plastically formed as a whole at one time, and then the inner aluminum alloy sheet (3) and the outer aluminum alloy sheet (4) are separated to obtain the inner aluminum alloy sheet (3) and the outer aluminum alloy sheet (4) with matching shapes.

9. The method for manufacturing a multi-component resin layer fiber reinforced metal laminate structure according to claim 1, characterized in that: In step S2, when the structures of the inner aluminum alloy sheet (3) and the outer aluminum alloy sheet (4) are complex, a layering method is adopted to achieve integrated manufacturing of the inner aluminum alloy sheet (3), the outer aluminum alloy sheet (4), the thermosetting glass fiber prepreg (1) and the thermoplastic resin (2).

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