An integrally formed method for an antenna radome spacer

Abstract

The application discloses an integrated forming method of an antenna cover isolation strip and a product thereof, relates to the field of small-size carbon fiber product rapid forming technology, and first, carbon fiber materials are pressed into carbon fiber plate materials, and the carbon fiber plate materials are processed into carbon fiber isolation strips; second, quartz fiber layers are laid in a lower mold, the carbon fiber isolation strips are placed in the middle concave parts of the quartz fiber layers, the carbon fiber isolation strips are tightly wrapped by the surfaces of the quartz fiber layers and no gap is left, then laying is continuously performed until the carbon fiber isolation strips completely wrap the carbon fiber isolation strips, the mold is closed after the composite material layers are completed, and the mold is placed in a hot press; and after heating and curing, the multilayer quartz fiber layers are formed into a quartz fiber wave-transparent plate. Compared with the prior art, the scheme has the advantages of non-metal material integrated forming and compact structure, the middle carbon fiber isolation strips have the characteristic of shielding, the scheme can effectively solve the signal interference problem of the receive-transmit separation type antenna, and the electromagnetic waves of the two side receiving antennas and the transmitting antenna are completely separated.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of rapid forming of small-size carbon fiber products, and particularly relates to an integrated forming method of an antenna cover isolation strip. BACKGROUND

[0002] Now, part of the antenna is in the form of separate receiving and transmitting, one side of the antenna receives signals and the other side transmits signals, and due to the size requirement of the antenna, the receiving and transmitting components are relatively close, which causes signal interference. How to solve the above-mentioned signal interference problem has become a technical problem in the field.

[0003] Some existing technicians design various complex isolation chamber structures to reduce the electromagnetic wave interference between the receiving antenna and the transmitting antenna on both sides as much as possible, but the improvement of the isolation chamber needs to involve the layout of the antenna cover and the antenna, which directly leads to an increase in design cost. In addition, part of the antenna structure is very compact, and the reserved space is extremely small, so it is impossible to further increase the isolation device.

[0004] How to effectively solve the signal interference problem of the receiving and transmitting separate type antenna has long plagued technicians in the technical field. SUMMARY

[0005] Therefore, the present application provides an integrated forming method of an antenna cover isolation strip, which is integrally formed by using a non-metal material, has a compact structure, and has the shielding characteristic of the middle carbon fiber isolation strip, so that the signal interference problem of the receiving and transmitting separate type antenna can be effectively solved, and the electromagnetic waves of the receiving antenna and the transmitting antenna on both sides can be completely separated.

[0006] In order to achieve the purpose of the present application, the present application adopts the following technical scheme:

[0007] An integrated forming method of an antenna cover isolation strip, characterized in that the following operation steps are included:

[0008] 1) carbon fiber material is pressed into a carbon fiber plate, and the carbon fiber plate is processed into a carbon fiber isolation strip (1);

[0009] 2) a quartz fiber layer is laid in the lower mold of the antenna cover mold cavity, the middle part of the lower mold is provided with a groove consistent with the shape of the carbon fiber isolation strip, and the fibers in the quartz fiber layer are integrally connected and the materials are not overlapped;

[0010] 3) the quartz fiber layer is uniformly and continuously laid until the thickness is 1 to 2 cm, the carbon fiber isolation strip is placed in the middle concave part of the quartz fiber layer, and the carbon fiber isolation strip is tightly wrapped by the surface of the quartz fiber layer without gap;

[0011] 4) after placing the carbon fiber isolation strip, continue to lay the quartz fiber layer until the carbon fiber isolation strip is completely wrapped by the carbon fiber isolation strip;

[0012] 5) After the completion of the composite material layer, the lower mold and the upper mold are closed, and after the mold assembly is completed, the whole is put into the hot press, the mold is uniformly pressed and heated to solidify and form, and after forming, the multi-layer quartz fiber layer forms a quartz fiber wave-transparent plate.

[0013] Preferably, the carbon fiber plate is made by layering and pre-pressing, and the thickness of the carbon fiber plate is pre-pressed once according to the thickness of 1 to 1.5 mm in order to discharge the gas between the layers, and the pressing temperature is controlled at 80 to 90℃.

[0014] Preferably, the carbon fiber plate is made by layering and pre-pressing, and the thickness of the carbon fiber plate is pre-pressed once according to the thickness of 1 to 1.5 mm in order to discharge the gas between the layers, and the pressing temperature is controlled at 80 to 90℃.

[0015] Preferably, the carbon fiber plate is made by layering and pre-pressing, and the thickness of the carbon fiber plate is pre-pressed once according to the thickness of 1 to 1.5 mm in order to discharge the gas between the layers, and the pressing temperature is controlled at 80 to 90℃.

[0016] Preferably, the carbon fiber plate is made by layering and pre-pressing, and the thickness of the carbon fiber plate is pre-pressed once according to the thickness of 1 to 1.5 mm in order to discharge the gas between the layers, and the pressing temperature is controlled at 80 to 90℃.

[0017] Preferably, during the heating and solidification forming process of the hot press: first, heat to 125 to 145℃, and solidify for 40 to 50 minutes; after reaching the solidification time, the hot press stops heating and maintains the pressure value of 145T to 165T; when the mold cools to 55 to 65℃, the mold is disassembled, and the product is disassembled from the mold.

[0018] An integrally formed product of a radome isolation strip includes an integrally formed carbon fiber isolation strip and a quartz fiber wave-transparent plate, wherein:

[0019] The carbon fiber isolation strip is arranged in the middle of the quartz fiber wave-transparent plate, and the cross section of the carbon fiber isolation strip is trapezoidal, with a height of 2 to 3 cm, an upper base width of 1 to 2 cm, and a lower base width of 2 to 2.5 cm;

[0020] The quartz fiber wave-transparent plate is overall square, and a plurality of connecting holes are uniformly arranged around the quartz fiber wave-transparent plate;

[0021] The quartz fiber wave-transparent plate is fixed on the antenna bottom cover by screws.

[0022] Preferably, a baffle is arranged in the center of the inside of the antenna bottom cover, dividing the inside of the antenna bottom cover into two independent cavities, one of which is installed with a receiving antenna, and the other of which is installed with a transmitting antenna.

[0023] The carbon fiber forming die and process of the present application have the following beneficial effects:

[0024] 1) The scheme adopts non-metal material integrated forming, compact structure, and the middle carbon fiber isolation strip has shielding characteristics, which can effectively solve the signal interference problem of the receiving and transmitting separation type antenna, completely separate the electromagnetic waves of the receiving antenna and the transmitting antenna on both sides, and only through improving the antenna cover without changing the antenna bottom cover, the reliable transmission of the receiving and transmitting signals can be completed.

[0025] 2) The product is simple to process, only five steps are needed to complete production, through the multi-angle cross-laying scheme and the layered pre-pressing mode, the product is reliable and durable, wherein: the quartz fiber layer can have better wave permeability, and the carbon fiber isolation strip has better signal blocking property. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 It is the first schematic diagram of the forming method of the present application;

[0027] Figure 2 It is the second schematic diagram of the forming method of the present application;

[0028] Figure 3 It is the third schematic diagram of the forming method of the present application;

[0029] Figure 4 It is the fourth schematic diagram of the forming method of the present application;

[0030] Figure 5 It is the first schematic diagram of the forming product of the present application;

[0031] Figure 6 It is the A-A cross-sectional view of Figure 5

[0032] Figure 7 It is the B-B cross-sectional view of Figure 5

[0033] In the figure, 1 is a carbon fiber isolation strip, 2 is a quartz fiber layer, 3 is a quartz fiber wave permeable plate, 4 is a lower die, 401 is a groove, 5 is an upper die, 6 is an antenna bottom cover, 601 is a baffle, 7 is a receiving antenna, and 8 is a transmitting antenna. DETAILED DESCRIPTION

[0034] ​​In the description of the present application, it should be understood that the terms "center", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present 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 present application. 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 as "first", "second" can be explicitly or implicitly included one or more. In the description of the present application, unless otherwise stated, the meaning of "a plurality of" is two or more.

[0035] As shown in Figures 1 to 4 A one-piece forming method of a radome isolation strip includes the following operation steps:

[0036] 1) Carbon fiber material is pressed into a carbon fiber plate, and the carbon fiber plate is processed into a carbon fiber isolation strip 1;

[0037] Specifically, the carbon fiber isolation strip 1 is used to isolate signal waves and replaces metal materials as a whole, so the uniformity of the material of the isolation strip must be consistent, the density must be high, and there must be no hollowing and bubbling in the middle. Therefore, the uniformity of the material must be ensured when the carbon fiber plate is pressed.

[0038] In actual work, the carbon fiber plate is made by layering and pre-pressing, the thickness of the carbon fiber plate is pre-pressed once according to the thickness of 1 to 1.5 mm to discharge the gas between the layers, the pressing temperature is controlled at 80 to 90℃, the resin in the prepreg is softened to facilitate the discharge of air between the layers, and at the same time, the tightness of the structure between the layers can be achieved. Finally, according to the curing temperature curve of the composite material, it is once cured and formed. The carbon fiber plate adopts a multi-angle cross-laying scheme, the angle between adjacent carbon fiber plate layers 2 is 15° or 30°, the carbon fiber plate is laid alternately according to the warp and weft directions, and the connections of the fiber strips are staggered in turn.

[0039] 2) In the lower mold 4 of the radome mold cavity, quartz fiber layers 2 are laid, the middle part of the lower mold 4 is provided with a groove 401 consistent with the shape of the carbon fiber isolation strip 1, and the fibers in the quartz fiber layers 2 are integrally connected and the material is not overlapped;

[0040] Specifically, the material is not overlapped as a whole, although the material loss is relatively large, but the whole non-overlapping material is easier to realize in the layering operation, and the overlapping or gap caused by material splicing is avoided, which avoids affecting the uniformity of the cover body and affecting the wave transmission and pointing consistency.

[0041] 3) When the quartz fiber layer 2 is uniformly and continuously laid to a thickness of 1 to 2 cm, the carbon fiber isolation strip 1 is placed in the middle of the lower recess of the quartz fiber layer 2, and the carbon fiber isolation strip 1 is tightly wrapped by the surface of the quartz fiber layer 2 without leaving a gap;

[0042] 4) After placing the carbon fiber isolation strip 1, continue to lay the quartz fiber layer 2 until the carbon fiber isolation strip 1 is completely wrapped by the carbon fiber isolation strip 1;

[0043] In actual work, the quartz fiber layer 2 is made by layering and pre-pressing, and the laying thickness of the quartz fiber layer 2 is pre-pressed once at a thickness of 0.9 to 1.2 mm to discharge the gas between the layers, and the pressing temperature is controlled at 80 to 85°C. The quartz fiber layer 2 adopts a multi-angle cross-laying scheme, and the angles between adjacent quartz fiber layers 2 are different by 15°, 30° or 45°, and the quartz fiber layer 2 is laid alternately in the warp and weft directions, and the connection of the fiber strips is staggered in turn.

[0044] 5) After the completion of the composite layer, the lower mold 4 and the upper mold 5 are combined, and after the mold is assembled, the whole is put into a hot press, a uniform pressure is applied to the mold, and it is heated and cured to form a quartz fiber wave-transparent plate 3 after molding.

[0045] Specifically, the temperature required for material curing and molding is reached, and the press sets the pressure value at each temperature stage according to the material curing temperature curve, and through the stages of softening pressure-curing pressure-holding pressure, the product is demolded when the mold temperature naturally cools to room temperature. After the product is formed, the cavity surface is no longer processed, only the secondary processing of the four connecting screw holes is done.

[0046] In actual work, during the heating and curing process of the hot press: first, heat to 125 to 145°C, and cure for 40 to 50 minutes, then stop heating and keep the pressure value at 145T to 165T when the mold temperature drops to 55 to 65°C, and then demold the product from the mold.

[0047] It should be noted that the molding process scheme adopts a preliminary preparation method to ensure the flatness and parallelism of the mold, and the smoothness. In the product manufacturing process, the gap required by the cooperation of the two kinds of composite materials is calculated, and the material size accuracy is ensured by computer numerical control cutting, and then the main part is molded at one time, reducing the problems of product deformation and poor surface finish caused by secondary processing.

[0048] As shown in Figures 5 to 7 , Figure 6 and Figure 7 are Figure 5A-A cross-sectional view and B-B cross-sectional view of the antenna radome isolation strip integrally formed product, including integrally formed carbon fiber isolation strip 1 and quartz fiber wave-transparent plate 3, wherein:

[0049] The carbon fiber isolation strip 1 is arranged in the middle of the quartz fiber wave-transparent plate 3, the cross section of the carbon fiber isolation strip 1 is trapezoidal, the height is 2-3 cm, the upper base width is 1-2 cm, and the lower base width is 2-2.5 cm; the quartz fiber wave-transparent plate 3 is overall square, and a plurality of connecting holes are uniformly arranged around the quartz fiber wave-transparent plate 3; the quartz fiber wave-transparent plate 3 is fixed on the antenna bottom cover 6 through screws.

[0050] Specifically, the inner center of the antenna bottom cover 6 is provided with a baffle 601, which divides the inner part of the antenna bottom cover 6 into two independent cavities, one cavity is internally provided with a receiving antenna 7, and the other cavity is internally provided with a transmitting antenna 8.

[0051] It should be noted that the product is aimed at the case where the antenna and the antenna cover are close together, and the metal shielding material cannot be increased, and finally the shielding is done in the antenna cover. The antenna is placed in the antenna bottom cover, and there are buffer mechanisms around the antenna and the side wall of the cover body as filling between the antenna and the side wall of the cover body to prevent the antenna from moving and being damaged. And the antenna bottom and the bottom cover also have a pre-pressing mechanism, when the antenna cover and the antenna bottom cover are locked through the screws around the periphery, the pre-pressing mechanism of the antenna bottom generates a pre-pressing force, which makes the top of the antenna contact with the inner wall of the antenna cover. In this way, the electromagnetic waves of the receiving antenna and the transmitting antenna distributed on both sides of the isolation strip are separated by the isolation strip to avoid interference. The scheme adopts non-metallic material integration, compact structure, and the middle carbon fiber isolation strip has shielding characteristics, which can effectively solve the signal interference problem of the receiving and transmitting type antenna, completely separate the electromagnetic waves of the receiving antenna and the transmitting antenna on both sides, and only by improving the antenna cover without changing the antenna bottom cover, the reliable transmission of the receiving and transmitting signals can be completed.

[0052] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A method for integrally molding an antenna radome isolation strip, characterized in that, The following steps are included: 1) Carbon fiber material is pressed into carbon fiber sheet, and the carbon fiber sheet is processed into carbon fiber isolation strip (1). 2) In the lower mold (4) of the radome mold cavity, a quartz fiber layup (2) is laid. The lower mold (4) has a groove (401) in the middle that is consistent with the shape of the carbon fiber isolation strip (1). The fibers in the quartz fiber layup (2) are connected as a whole and the materials do not overlap. 3) When the quartz fiber layup (2) is laid evenly and continuously until its thickness is 1 to 2 cm, the carbon fiber isolation strip (1) is placed in the middle recess of the quartz fiber layup (2). The carbon fiber isolation strip (1) is tightly wrapped by the surface of the quartz fiber layup (2) without leaving any gaps. 4) After placing the carbon fiber isolation strip (1), continue to lay the quartz fiber layup (2) until the carbon fiber isolation strip (1) completely wraps the carbon fiber isolation strip (1); 5) After the composite material is laid up, the lower mold (4) and the upper mold (5) are closed. After the mold is assembled, the whole thing is placed in a hot press. The mold is subjected to uniform pressure and heated to solidify and form. After forming, the multi-layer quartz fiber layup (2) forms a quartz fiber transparent plate (3).

2. The integral molding method of the antenna radome isolation strip as claimed in claim 1, characterized in that, The carbon fiber sheet is made by layered pre-compression. The carbon fiber sheet is laid in layers with a thickness of 1 to 1.5 mm and pre-compressed once to expel the gas between the layers. The pressing temperature is controlled at 80 to 90℃.

3. The integral molding method of the antenna radome isolation strip as described in claim 1, characterized in that, The carbon fiber board adopts a multi-angle cross-laying scheme. The angle between adjacent carbon fiber board layers (2) differs by 15° or 30°. The carbon fiber board is laid alternately in the warp and weft directions, and the connection points of the fiber strips are staggered in sequence.

4. The integral molding method of the antenna radome isolation strip as claimed in claim 1, characterized in that, The quartz fiber layup (2) is made by layered pre-compression. The thickness of the quartz fiber layup (2) is pre-compressed once according to the thickness of 0.9 to 1.2 mm in order to expel the gas between the layers. The pressing temperature is controlled at 80 to 85℃.

5. The integral molding method of the antenna radome isolation strip as claimed in claim 1, characterized in that, The quartz fiber layup (2) adopts a multi-angle cross-layup scheme. The angle between adjacent quartz fiber layups (2) differs by 15°, 30° or 45°. The quartz fiber layups (2) are laid alternately in the warp and weft directions, and the connection points of the fiber strips are staggered in sequence.

6. The integral molding method of the antenna radome isolation strip as claimed in claim 1, characterized in that, During the hot press heating and curing process: First, heat to 125℃ to 145℃ and cure for 40 to 50 minutes. After the curing time is reached, the hot press stops heating and maintains a pressure value of 145T to 165T. When the mold cools down to 55℃ to 65℃, demold and remove the product from the mold.

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