A processing method for a multi-layer fiber superposition to realize a built-in antenna of a shell

Abstract

The application discloses a processing method for a multi-layer fiber superposition to realize a built-in antenna of a shell, belongs to the technical field of vacuum introduction, and solves the problems of the traditional process, that is, increasing an antenna carrier in the interior, occupying the valuable shell inner cavity space, affecting the normal work of other components and elements, and not achieving the continuous amplification function of transmission signals and the like, wherein the processing method for the multi-layer fiber superposition to realize the built-in antenna of the shell comprises the following steps: preparing materials, defoaming the resin, vacuum introduction, demolding, processing and the like, the internal structure of the product produced by the processing method is compact and bubble-free, the processing method can effectively avoid insulation failure caused by cavities, the overall structural strength is high, the plasticity is strong, the antenna can be placed according to performance requirements, and the product plasticity can be performed according to modeling requirements.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of vacuum introduction, and particularly relates to a processing method for realizing a built-in antenna of a shell through multi-layer fiber superposition. BACKGROUND

[0002] With the continuous development of light weight and intelligence of communication equipment, functions such as satellite communication have entered people's daily life, and the strength of effective and continuous transmission and reception of signals is particularly important in the process of satellite communication. In order to effectively expand the signal capacity of the communication equipment, the traditional process increases the antenna carrier in the inside, which occupies the valuable shell cavity space on the one hand, and also has the risk of affecting the normal work of other components, and cannot achieve the function of continuous amplification of transmission signals.

[0003] Through retrieval, a glass fiber shell with a built-in antenna and a preparation method thereof are disclosed in Chinese patent literature (application number: 202110442747.2, publication number: CN112911049A). The first glass fiber layer is provided with a countersunk hole penetrating the first glass fiber layer along the left-right direction, and a connecting piece is installed in the countersunk hole. The glass fiber shell disclosed in the patent has low strength, and is not subjected to defoaming treatment, which can cause a cavity to be formed near the antenna material. The antenna material can generate an electric current under the inductive effect, and can accumulate electric charges in the cavity. Long-term accumulation can cause the insulation effect of the shell to fail, resulting in short circuit and even damage to the internal electrical components, and the strength and safety cannot be guaranteed. SUMMARY

[0004] The purpose of the present application is to overcome the shortcomings of the prior art and provide a processing method for realizing a built-in antenna of a shell through multi-layer fiber superposition, which has the characteristics of high overall strength, high safety and high plasticity, and solves the above technical problems.

[0005] The purpose of the present application can be achieved by the following technical solutions:

[0006] A processing method for realizing a built-in antenna of a shell through multi-layer fiber superposition, characterized by comprising the following steps:

[0007] Step 1: preparing antenna material according to antenna radio frequency structure;

[0008] Step 2: placing release film, fiber material A, fiber material B and antenna material in the mold according to the arrangement order of release film, fiber material A, fiber material B, antenna material, fiber material B, fiber material A and release film from top to bottom to obtain cloth stacking material one, and positioning tool is required when placing the antenna material;

[0009] Step 3: placing resin into a resin vacuum defoaming machine for defoaming, and a defoaming agent is required to be added to the resin;

[0010] Step four: cover the surface of the placed cloth stack one with a vacuum film, seal the mold cavity formed between the vacuum film and the mold, leave two air exchange holes between the vacuum film and the mold, the air exchange holes are located on opposite sides, one air exchange hole is connected to a vacuum pump, the other air exchange hole is connected to the liquid outlet pipe of a vacuum defoaming machine, use the vacuum pump to create a vacuum in the mold cavity to compact the cloth stack one, then introduce the defoamed resin into the mold cavity to infiltrate the cloth stack one;

[0011] Step five: heat the cloth stack one using the top heater and the bottom heater, the heating method adopts segmented heating method, and the cloth stack two is obtained after heating and curing;

[0012] Step six: open the vacuum film, take out the cloth stack two from the mold, and peel off the release film from the cloth stack two to obtain the shell;

[0013] Step seven: use a CNC processing platform to process into a single product according to the actual product modeling requirements.

[0014] The antenna material can be a copper sheet, a silver sheet or silver paste printed on a fiber material.

[0015] The mold is provided with a plurality of positioning holes.

[0016] The fiber material A is heavier than the fiber material B.

[0017] The resin vacuum defoaming machine comprises a vacuum chamber, a top cover, an exchange port, a motor, a control end, a liquid outlet, a stirring rod, a heating rod, support feet and a plurality of stirring fans, the top cover is arranged on the top of the vacuum chamber, the exchange port, the motor and the control end are arranged on the top of the top cover, the motor is arranged between the exchange port and the control end, the liquid outlet is arranged at the bottom of the vacuum chamber, the heating rod is arranged inside the stirring rod, the support feet are evenly and equidistantly arranged on the side of the vacuum chamber, the stirring rod is connected with the power output end of the motor, and the stirring fans are evenly and equidistantly arranged on the stirring rod. Heating can reduce the viscosity of the resin, and stirring can greatly improve the defoaming effect.

[0018] The stirring rod and the stirring fan are both made of metal material, when the heating rod is heated, the heat is transferred in the order of the heating rod, the stirring rod and the stirring fan, the heating area is expanded, the heating speed is accelerated, and the heating is more uniform.

[0019] The top heater comprises a top heating plate, a connecting frame, hydraulic support rods and a temperature monitor, the back surface of the heating plate is connected with the top of the connecting frame, the hydraulic support rods are arranged around the connecting frame, the top of the hydraulic support rods is connected with the connecting frame, and the temperature distributors are arranged at the central position, the upper left corner position, the upper right corner position, the lower left corner position and the lower right corner position of the heating surface of the heating plate respectively.

[0020] The bottom heater comprises a bottom heating plate, a support frame, a hydraulic support rod and a temperature monitor, the back of the bottom heating plate is connected with the top of the support frame, the hydraulic support rod is arranged around the support frame, and the temperature distributor is arranged at the central position, the upper left corner position, the upper right corner position, the lower left corner position and the lower right corner position of the heating surface of the heating plate respectively.

[0021] The segment heating method is as follows: the top heater of the first segment is heated to 50 DEG C, the bottom heater is heated to 60 DEG C, heating is performed for 20 min, the top heater of the second segment is heated to 90 DEG C, the bottom heater is heated to 90 DEG C, heating is performed for 15 min, the top heater of the third segment is heated to 90 DEG C, the bottom heater is heated to 170 DEG C, and heating is performed for 120 min.

[0022] The defoaming agent model is BYK-W 996, and the proportion is defoaming agent: component = 1:100.

[0023] Compared with the prior art, the present application has the following advantages:

[0024] 1. The internal structure is compact and free of bubbles, which not only effectively avoids insulation failure caused by cavities, but also has high overall structural strength.

[0025] 2. The plasticity is strong, the antenna can be placed according to the performance requirements, and the product plasticity can be performed according to the modeling requirements. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 is a flow chart of the present application.

[0027] Figure 2 is a perspective view of the resin vacuum defoaming machine.

[0028] Figure 3 is a cross-sectional view of the vacuum chamber of the resin vacuum defoaming machine.

[0029] Figure 4 is an enlarged view of structure A.

[0030] Figure 5 is a perspective view of the mold, the top heater and the bottom heater.

[0031] Figure 6 is a perspective view of the bottom heater.

[0032] Figure 7 is a perspective view of the top heater.

[0033] Figure 8 is a mold perspective view.

[0034] In the figure: 101, vacuum chamber; 102, top cover; 103, exchange port; 104, motor; 105, control end; 106, liquid outlet; 107, stirring rod; 108, heating rod; 109, supporting leg; 110, stirring fan; 2, top heater; 201, top heating plate; 202, connecting frame; 203, hydraulic supporting rod one; 204, temperature monitor one; 3, bottom heater; 301, bottom heating plate; 302, supporting frame; 303, hydraulic supporting rod two; 304, temperature monitor two; 4, mold. DETAILED DESCRIPTION

[0035] The above objects, features and advantages of the present application will become more apparent from the following detailed description of the preferred embodiments of the present application taken in conjunction with the accompanying drawings.

[0036] In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. However, it will be apparent to one skilled in the art that the present application can be practiced without the specific details given herein. In other instances, well-known methods have not been described in detail in order to avoid unnecessarily obscuring the present application. Therefore, the specific details set forth hereinafter are merely exemplary and should not be construed as limiting the scope of the present application.

[0037] Secondly, the "one embodiment" or "embodiment" referred to herein can include specific features, structures or characteristics in at least one implementation of the present application. "In one embodiment" appearing in different places in the specification does not mean the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments.

[0038] Example 1: Preparation scheme of the shell for the device

[0039] The shell for the device has high requirements for the structural strength of the product, does not need to consider the self-weight factor, and needs to save costs, so a resin formula with moderate strength can be selected, and different thicknesses of glass fiber cloth stacks and copper material antennas can be selected for manufacturing.

[0040] Please refer to Figures 1 to 8 The present application provides a technical solution:

[0041] Specifically:

[0042] Step one: cut the copper material antenna material into a predetermined size;

[0043] Step two: Teflon release cloth, EWR750 fiberglass cloth, EWR200 fiberglass cloth and copper antenna material are placed in the mold according to the arrangement order from top to bottom, that is, Teflon release cloth, EWR750 fiberglass cloth, EWR200, copper antenna material, EWR200, EWR750 fiberglass cloth and Teflon release cloth, to obtain cloth stack one, and a positioning tool is required when placing the copper antenna material;

[0044] Step three: The resin is placed in a resin vacuum defoaming machine for defoaming, and the resin components are as follows:

[0045]

[0046] Step four: The surface where the cloth stack one is placed is covered with a vacuum film, and the mold cavity formed between the vacuum film and the mold 4 is sealed, two air exchange holes are reserved between the vacuum film and the mold 4, the air exchange holes are located on the opposite sides, one air exchange hole is connected with a vacuum pump, and the other air exchange hole is connected with a liquid outlet pipe of a vacuum defoaming machine, a vacuum pump is used to extract the vacuum in the mold cavity, so as to compact the cloth stack one in the mold cavity, and then the defoamed resin is introduced into the mold cavity to infiltrate the cloth stack one;

[0047] Step five: The cloth stack one is heated by using the top heater 2 and the bottom heater 3, and the heating mode adopts a segmented heating method, the first segment of the top heater 2 is heated to 50 DEG C, the bottom heater 3 is heated to 60 DEG C, heating for 20 min, the second segment of the top heater 2 is heated to 90 DEG C, the bottom heater 3 is heated to 90 DEG C, heating for 15 min, the third segment of the top heater 2 is heated to 90 DEG C, the bottom heater 3 is heated to 170 DEG C, heating for 120 min, and the cloth stack two is obtained after heating and curing;

[0048] Step six: The vacuum film is opened, the cloth stack two is taken out of the mold 4, and the Teflon release cloth is peeled off from the cloth stack two to obtain a shell;

[0049] Step seven: A CNC processing machine is used to remove the excess resin and the excess resin part, and the surface is polished to obtain a vehicle shell.

[0050] Example 2: Preparation scheme of a shell for a communication device

[0051] The shell has a high requirement for self weight, and the thickness of the shell is also an important consideration, so a resin formula with low strength can be selected, and carbon fiber cloth with low thickness and fiberglass cloth with low thickness are stacked and printed with conductive silver paste to manufacture.

[0052] Please refer to Figures 1 to 8 The present application provides a technical scheme:

[0053] Specifically:

[0054] Step one: print conductive silver paste on EWR200 glass fiber cloth according to preset antenna position;

[0055] Step two: place Teflon release cloth, T300-3000 carbon fiber cloth, EWR200 glass fiber cloth, and EWR200 glass fiber cloth printed with conductive silver paste in the mold according to the arrangement order from top to bottom: Teflon release cloth, T300-3000 carbon fiber cloth, EWR200 glass fiber cloth, EWR200 glass fiber cloth printed with conductive silver paste, EWR200 glass fiber cloth, T300-3000 carbon fiber cloth, and Teflon release cloth, to obtain cloth stack one;

[0056] Step three: place the resin in the resin vacuum defoaming machine for defoaming. The resin components are as follows:

[0057]

[0058] Step four: cover the cloth stack one with a vacuum film, seal the mold cavity formed between the vacuum film and the mold 4, reserve two air exchange holes between the vacuum film and the mold 4, the air exchange holes are located on the opposite sides, one air exchange hole is connected to the vacuum pump, and the other air exchange hole is connected to the liquid outlet pipe of the vacuum defoaming machine, use the vacuum pump to vacuum the mold cavity to compact the cloth stack one, then introduce the defoamed resin into the mold cavity to infiltrate the cloth stack one;

[0059] Step five: heat the cloth stack one using the top heater 2 and the bottom heater 3, the heating method adopts segmented heating, the first segment of the top heater 2 is heated to 50℃, the bottom heater 3 is heated to 60℃, and heated for 20 minutes, the second segment of the top heater 2 is heated to 90℃, the bottom heater 3 is heated to 90℃, and heated for 15 minutes, the third segment of the top heater 2 is heated to 90℃, the bottom heater 3 is heated to 170℃, and heated for 120 minutes, after heating and curing, obtain cloth stack two;

[0060] Step six: open the vacuum film, take out the cloth stack two from the mold 4, and peel off the Teflon release cloth from the cloth stack two, to obtain the shell group;

[0061] Step seven: use the CNC processing machine to remove the excess resin and cut the shell group into individual shells, polish the surface and edges to obtain the shell for communication equipment.

[0062] Example 3: preparation scheme of vehicle shell

[0063] The vehicle shell has high requirements for the structural strength of the product, and needs to consider the self-weight factor, and also needs to consider the production cost, so a resin formula with high strength can be selected, and different thicknesses of glass fiber cloth and printed conductive silver paste glass fiber cloth can be used for production.

[0064] Please refer toFigures 1 to 8 The present application provides a technical solution:

[0065] Specifically:

[0066] Step one: print conductive silver paste on EWR200 glass fiber cloth according to the preset antenna position;

[0067] Step two: place Teflon release cloth, EWR750 glass fiber cloth, EWR200 glass fiber cloth and printed conductive silver paste EWR200 glass fiber cloth in the mold according to the arrangement order from top to bottom: Teflon release cloth, EWR750 glass fiber cloth, EWR200 glass fiber cloth, printed conductive silver paste EWR200 glass fiber cloth, EWR200 glass fiber cloth, EWR750 glass fiber cloth, Teflon release cloth, to obtain cloth stack one;

[0068] Step three: put the resin into the resin vacuum defoaming machine for defoaming, and the resin components are as follows:

[0069]

[0070] Step four: cover the cloth stack one with a vacuum film, and seal the mold cavity formed between the vacuum film and the mold 4. Two air exchange holes are reserved between the vacuum film and the mold 4, one air exchange hole is connected with a vacuum pump, and the other air exchange hole is connected with the liquid outlet pipe of the vacuum defoaming machine. A vacuum pump is used to extract the vacuum in the mold cavity to compact the cloth stack one, and then the defoamed resin is introduced into the mold cavity to infiltrate the cloth stack one;

[0071] Step five: heat the cloth stack one using the top heater 2 and the bottom heater 3, and the heating method adopts segmented heating method. The first segment of the top heater 2 is heated to 50℃, and the bottom heater 3 is heated to 60℃, and heated for 20 minutes. The second segment of the top heater 2 is heated to 90℃, and the bottom heater 3 is heated to 90℃, and heated for 15 minutes. The third segment of the top heater 2 is heated to 90℃, and the bottom heater 3 is heated to 170℃, and heated for 120 minutes. After heating and curing, the cloth stack two is obtained;

[0072] Step six: open the vacuum film, take out the cloth stack two from the mold 4, and peel off the Teflon release cloth from the cloth stack two to obtain the shell group;

[0073] Step seven: use a CNC processing machine to remove the excess resin and polish the surface and edges of the shell to obtain the preparation scheme of the vehicle shell.

[0074] In the description of the application, it is to be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the application.

[0075] In addition, the terms "first", "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the application, the meaning of "multiple" is two or more, unless otherwise specifically limited.

[0076] The above is only the preferred specific implementation of the application, but the protection scope of the application is not limited thereto, and any person skilled in the art can make equivalent replacements or changes within the technical scope disclosed by the application according to the technical scheme and inventive concept of the application, which should be covered within the protection scope of the application.

Claims

1. A method for processing a multi-layered fiber superimposed housing built-in antenna, characterized by, It comprises the following steps: Step one: prepare the antenna material according to the antenna radio frequency structure; Step two: place the release film, fiber material A, fiber material B and antenna material in the mold in the order of release film, fiber material A, fiber material B, antenna material, fiber material B, fiber material A, release film from top to bottom, and use positioning tool when placing the antenna material; Step three: put the resin into the resin vacuum defoaming machine for defoaming, and add defoaming agent to the resin; Step four: cover the cloth stack one with vacuum film, seal the mold cavity formed between the vacuum film and the mold (4), reserve two air exchange holes between the vacuum film and the mold (4), the air exchange holes are located on the opposite sides, one air exchange hole is connected with the vacuum pump, and the other air exchange hole is connected with the liquid outlet pipe of the vacuum defoaming machine, use the vacuum pump to vacuum the mold cavity to compact the cloth stack one, then introduce the defoamed resin into the mold cavity to soak the cloth stack one; Step five: heat the cloth stack one with the top heater (2) and the bottom heater (3), and use the segmented heating method for heating, and obtain the cloth stack two after heating and curing; Step six: open the vacuum film, take out the cloth stack two from the mold (4), and peel off the release film from the cloth stack two to obtain the shell; Step seven: use the CNC processing machine according to the actual product modeling requirements to process into a single product; The antenna material is a copper sheet, a silver sheet or silver paste printed on a fiber material; The fiber material A is heavier than the fiber material B; The fiber material A comprises EWR750 fiberglass cloth or T300-3000 carbon fiber cloth; The fiber material B comprises EWR200 fiberglass cloth.

2. The method according to claim 1, wherein the method is characterized by: The mold is provided with a plurality of positioning holes.

3. The method of claim 1, wherein the method further comprises: forming a plurality of layers of fibers on the first surface of the substrate; and forming a plurality of layers of fibers on the second surface of the substrate. The resin vacuum defoaming machine comprises a vacuum chamber (101), a top cover (102), an exchange port (103), a motor (104), a control end (105), a liquid outlet (106), a stirring rod (107), a heating rod (108), supporting feet (109) and a plurality of stirring fans (110), the top cover (102) is arranged on the top of the vacuum chamber (101), the exchange port (103), the motor (104) and the control end (105) are arranged on the top of the top cover (102), the motor (104) is arranged between the exchange port (103) and the control end (105), the liquid outlet (106) is arranged on the bottom of the vacuum chamber (101), the heating rod (108) is arranged inside the stirring rod (107), the supporting feet (109) are evenly and equidistantly arranged on the side of the vacuum chamber (101), the stirring rod (107) is connected with the power output end of the motor (104), and the stirring fans (110) are evenly and equidistantly arranged on the stirring rod (107).

4. The method according to claim 3, wherein the method is characterized by: The stirring rod (107) and the stirring fans (110) are both made of metal.

5. The method of claim 1, wherein the method further comprises: The top heater (2) includes a top heating plate (201), a connecting frame (202), a hydraulic support rod (203) and a temperature monitor (204). The back of the top heating plate (201) is connected to the top of the connecting frame (202). The hydraulic support rod (203) is arranged around the connecting frame (202). The top of the hydraulic support rod (203) is connected to the connecting frame (202). The temperature distributor (204) is respectively arranged at the center, upper left corner, upper right corner, lower left corner and lower right corner of the heating surface of the top heating plate (201). ​ 6. The method of claim 1, wherein the method further comprises: The bottom heater (3) includes a bottom heating plate (301), a support frame (302), a second hydraulic support rod (303) and a second temperature monitor (304). The back of the bottom heating plate (301) is connected to the top of the support frame (302). The second hydraulic support rod (303) is arranged around the support frame (302). The second temperature monitor (304) is respectively arranged at the center, upper left corner, upper right corner, lower left corner and lower right corner of the heating surface of the bottom heating plate (301). ​ 7. The method of claim 1, wherein the method further comprises: The segmented heating method is as follows: in the first segment, the top heater (2) is heated to 50°C, the bottom heater (3) is heated to 60°C, and the heating is carried out for 20 minutes; in the second segment, the top heater (2) is heated to 90°C, the bottom heater (3) is heated to 90°C, and the heating is carried out for 15 minutes; in the third segment, the top heater (2) is heated to 90°C, the bottom heater (3) is heated to 170°C, and the heating is carried out for 120 minutes. ​ 8. The method of claim 1, wherein the method further comprises: The defoamer model is BYK-W 996, and the ratio is defoamer: component = 1:

100. ​

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