CN106329097B - Antenna device and manufacturing method thereof - Google Patents
Antenna device and manufacturing method thereof Download PDFInfo
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Abstract
The invention provides an antenna device and a manufacturing method thereof. The antenna device comprises a fiber composite material layer, a core material layer and a metal layer, wherein the core material layer is arranged in the fiber composite material layer, and the metal layer is arranged on the outer surface of the fiber composite material layer. Since the core material layer is provided in the antenna device of the present application, the core material layer has a lighter weight than the fiber composite material layer and the metal layer, so that the antenna device including the fiber composite material layer, the core material layer, and the metal layer has a very light weight; meanwhile, the antenna device has the sandwich structure, so that materials of all layers in the sandwich layer have proper specific gravity, and the antenna device has high mechanical strength.
Description
Technical Field
The invention relates to the technical field of antennas, in particular to an antenna device and a manufacturing method thereof.
Background
An antenna is a transducer that converts a guided wave propagating on a transmission line into an electromagnetic wave propagating in an unbounded medium, or vice versa, and is a component used in a radio device for transmitting or receiving an electromagnetic wave. The antenna is used in many fields, among them, an airplane antenna is a device for radiating and receiving radio waves on an airplane, and the principle thereof is that a transmitting antenna converts ac electromagnetic energy sent from an oscillator into electromagnetic wave energy propagating to a certain space, and the airplane antenna needs to have features of small size, light weight and high strength.
The antenna in the prior art usually needs to form a thicker metal layer to ensure the mechanical strength of the antenna, so that the weight of the antenna is larger, and the requirement on the weight of the antenna in the aerospace field is difficult to meet. Therefore, there is an urgent need in the aerospace field to develop a lighter antenna to meet the demand of the continuous development of the technology.
Disclosure of Invention
The invention mainly aims to provide an antenna device and a manufacturing method thereof, so as to optimize the weight of the antenna device and further meet the requirement of the continuously developed aerospace field on the light antenna device.
In order to achieve the above object, according to one aspect of the present invention, there is provided an antenna device including a fiber composite material layer, a core material layer provided in the fiber composite material layer, and a metal layer provided on an outer surface of the fiber composite material layer.
Furthermore, an adhesive layer is arranged between the fiber composite material layer and the core material layer.
Further, the fiber composite material layer includes a first material layer and a second material layer, and a connection line formed by connecting the first material layer and the second material layer is parallel to the extending direction of the antenna device.
Further, the core material layer is sandwiched between the first material layer and the second material layer.
Further, the periphery of the core material layer is covered with the fiber composite material layer.
Further, the metal layer comprises a first metal sub-layer and a second metal sub-layer, and the first metal sub-layer and the second metal sub-layer respectively cover two opposite surfaces of the fiber composite material layer.
Further, the core layer comprises a structural foam material.
Further, the core material layer is made of any one or more selected from polymethacrylimide, polyvinyl chloride, polyethylene terephthalate, styrene acrylonitrile.
According to another aspect of the present invention, there is provided a method of manufacturing an antenna device, the method including: preparing a core material layer; laying a fiber prepreg layer on the inner surface of the mould; connecting the side edges of the mold so that the fiber prepreg layer wraps the core material layer; carrying out curing treatment to cure the fiber prepreg layer to form a fiber composite material layer; a metal layer is formed on an outer surface of the fiber composite layer.
Further, the step of laying up a fibrous prepreg layer on the inner surface of the mold comprises: providing a die consisting of a first sub die and a second sub die symmetrically arranged with the first sub die; a first prepreg layer is laid on the surface of the first sub-mould, a second prepreg layer is laid on the surface of the second sub-mould, and the first prepreg layer form a fiber prepreg layer.
Further, before the step of laying the fiber prepreg layer on the inner surface of the mold, a release agent is applied to the inner surface of the mold and a drying treatment is performed.
Further, the drying temperature is 15-125 ℃, and the drying time is not less than 30 min.
Further, after the step of laying the fiber prepreg layer on the inner surface of the mold, the manufacturing method further includes a step of coating an adhesive on the fiber prepreg layer to form an adhesive layer.
Further, after the step of forming the adhesive layer on the fiber prepreg layer, the fiber prepreg layer covered with the adhesive layer is subjected to vacuum pumping for 10-20 min.
Further, in the step of curing, the curing temperature is 100-200 ℃, and the curing time is 120-180 min.
Further, the first sub-mold and the second sub-mold are closed to enable the fiber prepreg layer to wrap the core material layer; after the fiber composite layer is formed, the fiber composite layer and the core layer are removed from the mold.
Further, the step of forming a metal layer on the outer surface of the fiber composite layer includes: forming a first metal sub-layer on one surface of the fiber composite material layer; and forming a second metal sub-layer on the other surface opposite to the one surface, wherein the first metal sub-layer and the second metal sub-layer form a metal layer.
Further, in the step of preparing the core layer, the core layer is prepared using a raw material including a structural foam material.
By applying the technical scheme of the invention, the invention provides an antenna device which comprises a fiber composite material layer, a core material layer and a metal layer, wherein the core material layer is arranged in the fiber composite material layer, and the metal layer is arranged on the outer surface of the fiber composite material layer. Since the core material layer is provided in the antenna device of the present application, the core material layer has a lighter weight than the fiber composite material layer and the metal layer, so that the antenna device including the fiber composite material layer, the core material layer, and the metal layer has a very light weight; meanwhile, the antenna device has the sandwich structure, so that materials of all layers in the sandwich layer have proper specific gravity, and the antenna device has high mechanical strength.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:
fig. 1 is a schematic cross-sectional view illustrating an antenna device according to an embodiment of the present invention;
fig. 2 is a schematic flow chart illustrating a method for manufacturing an antenna device according to an embodiment of the present invention.
Detailed Description
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
Spatially relative terms, such as "above … …," "above … …," "above … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.
As described in the background, there is an urgent need in the field of aerospace to develop a lighter weight antenna to meet the needs of the continuous development of the technology. The inventors of the present application have studied in view of the above-mentioned problems and have proposed an antenna device including, as shown in fig. 1, a fiber composite material layer 10, a core material layer 20, and a metal layer 30, the core material layer 20 being provided in the fiber composite material layer 10, and the metal layer 30 being provided on an outer surface of the fiber composite material layer 10. The antenna device can be applied to the technical field of aerospace.
The antenna device of the application has the advantages that the core material layer is arranged, and the core material layer has lighter weight compared with the fiber composite material layer and the metal layer, so that the antenna device comprising the fiber composite material layer, the core material layer and the metal layer has lighter weight; meanwhile, the antenna device has the sandwich structure, so that materials of all layers in the sandwich layer have proper specific gravity, and the antenna device has high mechanical strength.
In the antenna device described above in the present application, the core material layer 20 preferably comprises a structural foam material. Since the core material layer 20 includes the structural foam material, the structural foam material has excellent specific stiffness and specific strength, excellent compression, tension, cutting, and bending properties, and is light in weight, thereby providing the antenna device including the fiber composite material layer 10 and the core material layer 20 with high mechanical strength and light weight.
In the antenna device according to the present invention, an adhesive layer is preferably further provided between the fiber composite material layer 10 and the core material layer 20. The material forming the adhesive layer may be an adhesive, such as a thermoplastic adhesive, a thermosetting adhesive, a synthetic rubber adhesive, and a rubber resin agent. The adhesive layer provides stronger connection between the fiber composite material layer 10 and the core material layer 20.
In the antenna device described above in the present application, preferably, the fiber composite material layer 10 includes a first material layer and a second material layer, and a connection line formed by connecting the first material layer and the second material layer is parallel to the extending direction of the antenna device. That is, the antenna device has a structure including a first material layer, a core material layer 20, and a second material layer in this order from top to bottom. More preferably, the first material layer and the second material layer may have the same thickness, so that the formed antenna device has a symmetrical structure, and the mechanical strength of the antenna device is further improved.
In the antenna device described above in the present application, the metal layer 30 is composed of any one or more of gold, silver, copper, nickel, and aluminum; the fiber composite material layer 10 is formed by laminating prepregs and curing; the core material layer 20 is made of Polymethacrylimide (PMI), which is a light and closed-cell rigid foam, has good mechanical properties, thermal deformation temperature, and chemical stability, has good compatibility with other resins, is easy to machine, and is easy to thermoform, so that the antenna device including the fiber composite material layer 10 and the core material layer 20 has high mechanical strength and light weight.
According to another aspect of the present invention, there is provided a method of manufacturing an antenna device, as shown in fig. 2. The preparation method comprises the following steps: preparing a core material layer; laying a fiber prepreg layer on the inner surface of the mould; connecting the side edges of the mold so that the fiber prepreg layer wraps the core material layer; carrying out curing treatment to cure the fiber prepreg layer to form a fiber composite material layer; a metal layer is formed on an outer surface of the fiber composite layer.
In the above manufacturing method, since the core material layer is formed in the manufactured antenna device, the core material layer has a lighter weight than the fiber composite material layer and the metal layer, so that the antenna device including the fiber composite material layer, the core material layer and the metal layer has a lighter weight; meanwhile, the prepared antenna device has a sandwich structure, so that materials of all layers in the sandwich layer have proper specific gravity, and the antenna device has high mechanical strength.
An exemplary embodiment of a method of manufacturing an antenna arrangement according to the present invention will be described in more detail below with reference to fig. 1. These exemplary embodiments may, however, be embodied in many different forms and should not be construed as limited to only the embodiments set forth herein. It should be understood that these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of these exemplary embodiments to those skilled in the art.
First, the core material layer 20 is prepared. Preferably, in the step of preparing the core layer 20, the core layer 20 is prepared using a raw material including a structural foam material. In the above manufacturing method, since the core material layer 20 is manufactured using the raw material including the structural foam material, the structural foam material has excellent specific stiffness and specific strength, excellent compression, tension, cutting, and bending properties, and is light in weight, so that the antenna device including the fiber composite material layer 10 and the core material layer 20, which is formed later, has high mechanical strength and light weight.
In a preferred embodiment, core layer 20 is formed in a desired shape and size using a mold process. More preferably, after the core material layer 20 is formed, the core material layer 20 is baked, wherein the baking temperature is 105 to 125 ℃, and the baking time is 1 to 5 hours. The excess water vapor in the core material layer 20 can be removed by the baking process, thereby reducing the weight of the core material layer 20.
In the above preferred embodiment, the core material layer 20 may be made of any one or more selected from polymethacrylimide, polyvinyl chloride, polyethylene terephthalate, styrene acrylonitrile. Preferably, the structural foam material constituting the core material layer 20 may be Polymethacrylimide (PMI), which is a light, closed-cell, rigid foam plastic having good mechanical properties, thermal deformation temperature, and chemical stability, good compatibility with other resins, easy machining, and easy thermoforming, thereby allowing the antenna device including the fiber composite material layer 10 and the core material layer 20 to have high mechanical strength and light weight.
After completing the step of preparing the core material layer 20, the core material layer 20 comprising a structural foam material, a layer of fibrous prepreg is laid on the inner surface of the mould. Preferably, the fibrous prepreg layer may be a plurality of layers of fibrous prepregs arranged in a stack, the plurality of layers of prepregs arranged in a stack enabling the fibrous prepreg layer to have greater strength. Wherein the method of forming a prepreg may comprise the steps of: in order to thermally melt the epoxy resin to form a glue, the fiber body and the glue are subjected to an impregnation treatment to form a prepreg. The fiber body can be made of fiber bundles or fiber fabrics, and the fiber body is any one or more of fibrilia, carbon fiber, glass fiber, polypropylene fiber, aramid fiber and basalt fiber. More preferably, the fiber body is a plain quartz fiber cloth or a unidirectional quartz fiber cloth.
There are many ways of impregnating the fibrous body with the glue to form a prepreg, and in a preferred embodiment, the step of impregnating comprises: putting the glue solution into a gluing layer machine for gluing to form a gluing layer; and (3) putting the fiber body and the adhesive layer into an impregnation machine, and then carrying out continuous hot pressing to form the prepreg. The skilled person can select suitable process parameters for the impregnation treatment according to the actual process requirements.
The step of laying up the fibrous prepreg layer on the inner surface of the mould may be varied, and in a preferred embodiment the step of laying up the fibrous prepreg layer on the inner surface of the mould comprises: providing a die consisting of a first sub die and a second sub die symmetrically arranged with the first sub die; a first prepreg layer is laid on the surface of the first sub-mould, a second prepreg layer is laid on the surface of the second sub-mould, and the first prepreg layer form a fiber prepreg layer. In the preferred embodiment, the fiber prepreg layer can be formed only by using a mold formed of two divided molds, and the antenna device required for this application can be formed.
Before the step of laying the fiber prepreg layer on the inner surface of the mold, it is preferable to coat a release agent on the inner surface of the mold and perform a drying treatment. The mold release agent allows the antenna device formed in a subsequent process to be more easily released from the mold. When the mold release agent is brushed in the mold, the temperature of the inner surface of the mold is not lower than 15 ℃, if the mold release agent is coated for the first time, preferably, three complete layers of the mold release agent are continuously coated on the surface of the mold, each layer is vertical to the coating direction of the previous layer, drying treatment can be carried out for at least 15min after each layer is coated, and after the final coating is finished, the mold release agent is dried, wherein the drying treatment temperature can be 15-125 ℃, and the drying time is not shorter than 30 min. Within the above preferred process parameter ranges, the release agent can achieve a better separation effect.
After the step of laying the fibrous prepreg layer on the inner surface of the mold, preferably, the manufacturing method further includes a step of coating an adhesive on the fibrous prepreg layer to form an adhesive layer. The adhesive layer provides stronger connection between the fiber composite material layer 10 and the core material layer 20. The material forming the adhesive layer may be an adhesive, such as a thermoplastic adhesive, a thermosetting adhesive, a synthetic rubber adhesive, and a rubber resin agent.
In the above preferred embodiment, after the step of forming the adhesive layer on the fiber prepreg layer, the fiber prepreg layer covered with the adhesive layer may be subjected to vacuum-pumping for 10 to 20 min. The vacuumizing treatment can reduce the harm of water vapor brought to the fiber prepreg layer in the process, and the adhesive layer can be better adhered to the fiber prepreg layer.
After the step of laying the fiber prepreg layer on the inner surface of the mold is completed, the side edges of the mold are connected so that the fiber prepreg layer wraps the core material layer 20. When a mold composed of a first sub-mold and a second sub-mold symmetrically disposed with respect to the first sub-mold is selected to manufacture the antenna device, the first sub-mold and the second sub-mold may be closed to wrap the fiber prepreg layer around the core material layer 20.
After the step of joining the side edges of the mold to wrap the fiber prepreg layer around the core material layer 20 is completed, a curing process is performed to cure the fiber prepreg layer to form the fiber composite material layer 10. The fiber prepreg layer as a semi-finished product can be formed into the fiber composite material layer 10 having high mechanical strength by the curing treatment, and the fiber composite material layer 10 and the core material layer 20 can be integrally cured. The process conditions of the curing treatment can be set according to actual requirements, preferably, the curing temperature is 100-200 ℃, and the curing time is 120-180 min. The fiber composite layer 10 formed within the above-described preferred parameter ranges has higher mechanical strength and better bonding force between the fiber composite layer 10 and the core material layer 20. Further, after the fiber composite material layer 10 is formed, the fiber composite material layer 10 and the core material layer 20 are released from the mold.
In the step of completing the curing process to cure the fiber prepreg layer to form the fiber composite material layer 10, the metal layer 30 is formed on the outer surface of the fiber composite material layer 10. The process of forming the metal layer 30 may be selected according to actual requirements, and preferably, the process of forming the metal layer 30 is an electroplating process, a vacuum coating process or a painting process. The metal layer 30 may be made of any one or more of gold, silver, copper, nickel, and aluminum.
The following will further describe the method for manufacturing the antenna device provided in the present application with reference to the embodiments.
Example 1
The method for manufacturing the antenna device provided by the embodiment includes the following steps:
firstly, preparing a core material layer, wherein the core material layer consists of polymethacrylimide; laying a fiber prepreg layer on the inner surface of the mold, wherein the prepreg in the fiber prepreg layer is an impregnated compound comprising epoxy resin and glass fiber; secondly, connecting the side edges of the mould to enable the fiber prepreg layer to wrap the core material layer; thirdly, curing to enable the fiber prepreg layer to be cured to form a fiber composite material layer, wherein the curing temperature is 150 ℃, and the curing time is 150 min; and finally, forming a metal layer made of aluminum on the outer surface of the fiber composite material layer by a brushing process. The core material layer, the fiber composite material layer and the metal layer constitute an antenna device.
Example 2
The method for manufacturing the antenna device provided by the embodiment includes the following steps:
firstly, preparing a core material layer, wherein the core material layer consists of polymethacrylimide; coating a release agent on the inner surface of a mould, drying, and then paving a fiber prepreg layer on the inner surface of the mould, wherein the prepreg in the fiber prepreg layer is an impregnated compound comprising epoxy resin and glass fiber, the drying temperature is 15 ℃, and the drying time is 30 min; secondly, connecting the side edges of the mould to enable the fiber prepreg layer to wrap the core material layer; thirdly, carrying out curing treatment to cure the fiber prepreg layer to form a fiber composite material layer, wherein the curing temperature is 100 ℃, and the curing time is 120 min; and finally, forming a metal layer made of aluminum on the outer surface of the fiber composite material layer through an electroplating process. The core material layer, the fiber composite material layer and the metal layer constitute an antenna device.
Example 3
The method for manufacturing the antenna device provided by the embodiment includes the following steps:
firstly, preparing a core material layer, wherein the core material layer consists of polymethacrylimide; coating a release agent on the inner surface of a mould, drying, and then paving a fiber prepreg layer on the inner surface of the mould, wherein the prepreg in the fiber prepreg layer is an impregnated compound comprising epoxy resin and glass fiber, the drying temperature is 125 ℃, and the drying time is 60 min; coating an adhesive on the fiber prepreg layer to form an adhesive layer, and vacuumizing the fiber prepreg layer covered with the adhesive layer for 20 min; secondly, connecting the side edges of the mould to enable the fiber prepreg layer to wrap the core material layer; thirdly, curing to enable the fiber prepreg layer to be cured to form a fiber composite material layer, wherein the curing temperature is 200 ℃, and the curing time is 180 min; and finally, forming a metal layer made of copper on the outer surface of the fiber composite material layer by a vacuum coating process. The core material layer, the fiber composite material layer and the metal layer constitute an antenna device.
Example 4
The method for manufacturing the antenna device provided by the embodiment includes the following steps:
firstly, preparing a core material layer, wherein the core material layer consists of polymethacrylimide; coating a release agent on the inner surface of a mould, drying, and then paving a fiber prepreg layer on the inner surface of the mould, wherein the prepreg in the fiber prepreg layer is an impregnated compound comprising epoxy resin and glass fiber, the drying temperature is 60 ℃, and the drying time is 45 min; coating an adhesive on the fiber prepreg layer to form an adhesive layer, and vacuumizing the fiber prepreg layer covered with the adhesive layer for 10 min; secondly, connecting the side edges of the mould to enable the fiber prepreg layer to wrap the core material layer; thirdly, curing to enable the fiber prepreg layer to be cured to form a fiber composite material layer, wherein the curing temperature is 150 ℃, and the curing time is 150 min; and finally, forming a metal layer made of copper on the outer surface of the fiber composite material layer by a vacuum coating process. The core material layer, the fiber composite material layer and the metal layer constitute an antenna device.
Comparative example 1
The method for manufacturing the antenna device provided by the comparative example includes the steps of:
firstly, laying a resin layer on the inner surface of a mould; secondly, carrying out curing treatment to cure the resin layer, wherein the curing temperature is 150 ℃, and the curing time is 150 min; and finally, forming a metal layer made of aluminum on the outer surface of the resin layer through a painting process. The resin layer and the metal layer constitute an antenna device.
Comparative example 2
The method for manufacturing the antenna device provided by the comparative example includes the steps of:
firstly, laying a resin layer on the inner surface of a mould; secondly, carrying out curing treatment to cure the resin layer, wherein the curing temperature is 100 ℃, and the curing time is 120 min; and finally, forming a metal layer made of aluminum on the outer surface of the resin layer through a painting process. The resin layer and the metal layer constitute an antenna device.
Comparative example 3
The method for manufacturing the antenna device provided by the comparative example includes the steps of:
firstly, laying a resin layer on the inner surface of a mould; secondly, carrying out curing treatment to cure the resin layer, wherein the curing temperature is 200 ℃, and the curing time is 180 min; and finally, forming a metal layer made of aluminum on the outer surface of the resin layer through a painting process. The resin layer and the metal layer constitute an antenna device.
The antenna devices provided in the above examples 1 to 4 and comparative examples 1 to 3 were subjected to tests for mechanical strength and weight, and the test results are shown in the following table.
| Item | Weight g | Fatigue strength/tensile strength% | Tensile strength MPa |
| Example 1 | 180 | 75 | 461 |
| Example 2 | 165 | 60 | 400 |
| Example 3 | 220 | 80 | 520 |
| Example 4 | 180 | 78 | 479 |
| Comparative example 1 | 180 | 43 | 247 |
| Comparative example 2 | 165 | 30 | 200 |
| Comparative example 3 | 220 | 50 | 290 |
As can be seen from the above table, the weight of the antenna devices provided in examples 1 to 4 and comparative examples 1 to 3 is between 165-220g, the fatigue strength of the antenna device prepared in the comparative example is 30-50% of the tensile strength, and the ratio of the fatigue strength to the tensile strength of the antenna device prepared in the examples can reach 60-80%, the tensile strength of the antenna device prepared in the comparative example is 200-290MPa, and the tensile strength of the antenna device prepared in the examples can reach 400-520MPa, and for the same weight of the antenna device, the antenna device prepared in the example of the present application is larger than that prepared in the comparative example, so that the antenna device prepared by the technical scheme of the present invention can have a lighter weight compared with the antenna device prepared in the comparative example on the basis of ensuring that the antenna device has a certain tensile strength.
From the above description, it can be seen that the above-described embodiments of the present invention achieve the following technical effects:
1) the antenna device has the sandwich structure, so that materials of all layers in the sandwich layer have proper specific gravity, and the antenna device comprising the fiber composite material layer, the core material layer and the metal layer has high mechanical strength;
2) since the core material layer includes the structural foam material, the structural foam material has excellent specific stiffness and specific strength, excellent compression, tension, cutting and bending properties, and is light in weight, thereby enabling the antenna device including the fiber composite material layer and the core material layer to have high mechanical strength and light weight.
The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (8)
1. A method of manufacturing an antenna device, the method comprising:
preparing a core material layer (20);
laying a fiber prepreg layer on the inner surface of the mould;
-joining the sides of the mould such that the fibre prepreg layer wraps around the core layer (20);
carrying out a curing treatment to cure the fiber prepreg layer to form a fiber composite material layer (10);
forming a metal layer (30) on an outer surface of the fiber composite layer (10),
after the step of laying the fiber prepreg layer on the inner surface of the mold, the manufacturing method further includes a step of coating an adhesive on the fiber prepreg layer to form an adhesive layer,
after the step of forming the adhesive layer on the fiber prepreg layer, carrying out vacuum-pumping treatment on the fiber prepreg layer covered with the adhesive layer, wherein the time of the vacuum-pumping treatment is 10-20 min,
in the step of preparing the core material layer (20), the core material layer (20) is formed in a desired shape and size by using a mold process, and the core material layer (20) is subjected to a baking process after the core material layer (20) is formed.
2. The method of manufacturing according to claim 1, wherein the step of laying the fiber prepreg layer on the inner surface of the mold includes:
providing the mould consisting of a first sub-mould and a second sub-mould symmetrically arranged with the first sub-mould;
laying a first fibrous prepreg layer on the surface of the first sub-mould and laying a second fibrous prepreg layer on the surface of the second sub-mould, and the first and second fibrous prepreg layers constitute the fibrous prepreg layer.
3. The method of manufacturing according to claim 1, wherein a release agent is applied to the inner surface of the mold and a drying treatment is performed before the step of laying the fiber prepreg layer on the inner surface of the mold.
4. The manufacturing method according to claim 3, wherein the temperature of the drying treatment is 15 to 125 ℃, and the drying time is not less than 30 min.
5. The method according to claim 1, wherein the curing step is carried out at a curing temperature of 100 to 200 ℃ for a curing time of 120 to 180 min.
6. The method of manufacturing according to claim 2,
closing the first and second sub-molds so that the fiber prepreg layer wraps around a core material layer (20);
after forming the fibre composite layer (10), the fibre composite layer (10) and the core layer (20) are released from the mould.
7. Production method according to claim 1, wherein the step of forming the metal layer (30) on the outer surface of the fibre composite layer (10) comprises:
forming a first metal sub-layer on one surface of the fiber composite layer (10); and are
And forming a second metal sub-layer on the other surface opposite to the one surface, wherein the first metal sub-layer and the second metal sub-layer form the metal layer (30).
8. The method of making as set forth in claim 1, characterized in that in the step of preparing the core layer (20), the core layer (20) is prepared from a raw material comprising a structural foam material.
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| US4888234A (en) * | 1986-07-17 | 1989-12-19 | Gates Formed-Fibre Products, Inc. | Formable fiber composite |
| US5344685A (en) * | 1993-03-01 | 1994-09-06 | Mcdonnell Douglas Corporation | Production of composite sandwich structures |
| CN102886935A (en) * | 2011-07-21 | 2013-01-23 | 联想(北京)有限公司 | Composite material and preparation method thereof and electronic device with composite material |
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