Forming structure and method of high-sealing-performance glass fiber reinforced plastic radar radome base

Abstract

The invention discloses a forming structure and method for a high-sealing-performance glass fiber reinforced plastic radar radome base. According to the forming structure, metal bases are arranged at the two ends of metal bases, sealing gaskets are arranged between the metal bases, the two sides of a forming mold cover the side faces of the metal bases, and the inner side face of the forming mold is a forming face. According to the method, an outer skin is laid on the inner side face of a forming mold and extends between the forming mold and a metal base; two ends of the cellular board are positioned on the top surface of the metal base; two ends of the inner skin coat the top surface and the inner side surface of the metal base and extend to the sealing gasket; after the inner and outer skins and the metal base are solidified into a whole, the bolts are detached to take down the metal base and demolded from the forming mold, and the radome base composed of the inner and outer skins, the metal base and the cellular board is obtained. According to the forming structure and method, the hardness of the antenna housing base is enhanced, the flatness of the contact surface is guaranteed, and therefore the antenna housing base has better sealing performance.

Description

Technical Field

[0001] The present invention relates to the technical field of radar antennas, and in particular to a molding structure and method for a high-sealability glass fiber reinforced plastic radar antenna cover base. Background Art

[0002] The radome is a closed space formed around the radar antenna, in which the radar antenna is placed to protect the radar antenna system from the direct impact of the atmospheric environment, which greatly improves the working environment of the radar antenna system. At the same time, it greatly reduces the daily maintenance and repair work of the radar antenna system and extends the service life of the radar antenna system. The performance of the radome is the key to ensuring the long-term normal operation of the radar antenna. Among them, the sealing performance of the radome is one of the important performances of the radome, which puts higher requirements on the material and molding method of the radome.

[0003] The mounting surface of the antenna cover base produced by the traditional FRP molding process is mostly a FRP solid. The defects of the FRP solid are poor hardness, poor processability, and poor flatness. The FRP solid is prone to aging and deformation in the long-term natural environment, which greatly reduces the sealing of the antenna cover base and is prone to abnormalities such as water leakage, thus affecting the use of the antenna cover. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a molding structure and method for a high-sealing fiberglass radar antenna cover base. The molding structure and method enhance the hardness of the antenna cover base, ensure the flatness of the contact surface, and improve the sealing performance of the antenna cover base, so that the antenna cover base can obtain better sealing after being connected to the radar antenna base, and prevent the antenna cover base from being deformed due to long-term aging in the later stage, resulting in a gap with the radar antenna base, thereby causing abnormal phenomena such as water leakage, thereby ensuring the normal use of the antenna cover base.

[0005] In order to solve the above technical problems, the molding structure of the high-sealing fiberglass radar antenna cover base of the present invention includes a molding mold, a metal base, bolts, a sealing gasket and a metal base. The metal base is arranged at both ends of the metal base and is fastened to the metal base by the bolts. The sealing gasket is arranged between the metal base and the metal base. The two sides of the molding mold are covered on the side of the metal base, and the inner side of the molding mold is the molding surface of the radar antenna cover base.

[0006] Furthermore, a gap is provided between the forming die and the metal base.

[0007] A molding method for a high-sealability fiberglass reinforced plastic radar antenna cover base based on the above molding structure comprises the following steps: Step 1: Lay the outer skin on the inner side of the forming mold, and the outer skin extends between the forming mold and the metal base; Step 2: a honeycomb panel is arranged on the inner side of the outer skin, and both ends of the honeycomb panel are located on the top surface of the metal base; Step 3: Lay an inner skin on the inner side of the honeycomb panel, and the two ends of the inner skin respectively cover the top surface and the inner side surface of the metal base and extend to the sealing gasket; Step 4: After the inner skin and the outer skin are cured into one with the metal base, the bolts are removed to remove the metal base, and the metal base is demolded from the forming mold to obtain a radome base consisting of the inner skin, the outer skin, the metal base and the honeycomb panel. Furthermore, the outer skin and the inner skin are high-strength glass fiber composite panels.

[0008] Furthermore, the outer skin, inner skin and honeycomb panel are cured into one with the metal base by using epoxy resin bonding and vacuum bagging molding process. Since the molding structure and method of the high-sealability glass fiber reinforced plastic radar antenna cover base of the present invention adopt the above technical scheme, that is, the metal base of the molding structure is arranged at both ends of the metal base and is fastened and connected by bolts, the sealing gasket is arranged between the metal base and the metal base, the two sides of the molding mold are covered on the side of the metal base, and the inner side of the molding mold is the molding surface of the radar antenna cover base. In this method, the outer skin is laid on the inner side of the molding mold and extends to between the molding mold and the metal base; a honeycomb panel is arranged on the inner side of the outer skin, and the two ends of the honeycomb panel are located on the top surface of the metal base; the inner skin is laid on the inner side of the honeycomb panel, and the two ends of the inner skin cover the top surface and the inner side of the metal base and extend to the sealing gasket; after the inner skin and the outer skin are solidified into one with the metal base, the bolts are removed to remove the metal base, and the metal base is demolded from the molding mold to obtain a radome base composed of the inner skin, the outer skin, the metal base and the honeycomb panel. The molding structure and method enhance the hardness of the radome base and ensure the flatness of the contact surface, so that the radome base has better sealing. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments: Figure 1 It is a schematic diagram of the molding structure of the high-sealability fiberglass reinforced plastic radar antenna cover base of the present invention; Figure 2 for Figure 1 Enlarged schematic diagram of part A in the middle. DETAILED DESCRIPTION

[0010] Implementation example Figure 1 and Figure 2As shown, the molding structure of the high-sealing fiberglass radar antenna cover base of the present invention includes a molding mold 1, a metal base 5, bolts 6, a sealing gasket 7 and a metal base 8, wherein the metal base 5 is arranged at both ends of the metal base 8 and is fastened and connected by the bolts 6, the sealing gasket 7 is arranged between the metal base 5 and the metal base 8, the two sides of the molding mold 1 are covered on the side surfaces of the metal base 5, and the inner side surface of the molding mold 1 is the molding surface of the radar antenna cover base.

[0011] Preferably, a gap is provided between the molding die 1 and the metal base 5 .

[0012] The advantage of this structure is that the flatness accuracy of the mounting surface of the traditional fiberglass structure antenna cover base is much lower than the flatness of the metal base mounting surface. This structure uses a metal base to replace the traditional fiberglass base, which greatly increases the flatness of the mounting surface of the antenna cover base, thereby making the product have better sealing.

[0013] A molding method for a high-sealability fiberglass reinforced plastic radar antenna cover base based on the above molding structure comprises the following steps: Step 1: Lay the outer skin 3 on the inner side of the forming mold 1, and the outer skin 3 extends between the forming mold 1 and the metal base 5; Step 2: a honeycomb panel 2 is arranged on the inner side of the outer skin 3, and both ends of the honeycomb panel 2 are located on the top surface of the metal base 5; Step 3: Lay the inner skin 4 on the inner side of the honeycomb panel 2, and the two ends of the inner skin 4 respectively cover the top surface and the inner side surface of the metal base 5 and extend to the sealing gasket 7; Step 4: After the inner skin 4 and the outer skin 3 are solidified into one with the metal base 5, remove the bolts 6 to take off the metal base 8, and demold it from the forming mold 1 to obtain the antenna cover base composed of the inner skin 4, the outer skin 3, the metal base 5 and the honeycomb panel 2.

[0014] Preferably, the outer skin 4 and the inner skin 3 are high-strength glass fiber composite panels.

[0015] Preferably, the outer skin 4, the inner skin 3 and the honeycomb panel 2 are cured into one body with the metal base 5 by using epoxy resin bonding and vacuum bagging molding process.

[0016] Compared with the molding process of the traditional FRP antenna cover base, this method has a shorter molding time and higher efficiency. This molding process eliminates the punching process of the traditional FRP antenna cover base. The holes are machined during the processing of the metal base, which can achieve higher hole position accuracy than the post-punching of traditional FRP products. The screw holes for fastening the metal base to the metal base can be used as screw holes for connecting to the radar antenna base.

[0017] This molding structure adopts a sandwich structure between the molding mold and the metal base. The metal base is fixed with bolts and a metal base, and a sealing gasket is arranged between the metal base and the metal base. When the antenna cover base is molded, epoxy resin is used as the matrix material, the outer skin and inner skin of high-strength glass fiber are used as reinforcing materials, and the honeycomb panel is used as the core layer; when making, the outer skin is first configured at the molding mold, the honeycomb panel and the metal base are configured on the outer skin, and the inner skin is configured on the surface of the metal base. The inner and outer skins are bonded to the honeycomb panel and the metal base through epoxy resin and cured into one by vacuum bag pressing. Among them, the temperature tolerance of the matrix material epoxy resin is less than 120℃, and the temperature tolerance of the honeycomb panel material is less than 120℃. This molding structure and the antenna cover base made of it are suitable for antenna covers of various frequency bands with high sealing requirements.

[0018] The material selected for this molding structure has excellent temperature resistance, which can ensure that the antenna cover base has good heat resistance. The molding process is simple and practical. The inner and outer skins are bonded to the honeycomb panel and the metal base through epoxy resin and are cured into one body by vacuum bag pressing. The two are firmly combined. In addition, due to the processability and flatness of the metal base, it has good structural strength and extremely high sealing.

Claims

1. A molding structure of a high-sealing glass fiber reinforced plastic radar antenna cover base, characterized in that: It includes a forming mold, a metal base, bolts, a sealing gasket and a metal base. The metal base is arranged at both ends of the metal base and is fastened to each other by the bolts. The sealing gasket is arranged between the metal base and the metal base. The two sides of the forming mold are covered on the side surfaces of the metal base, and the inner side surface of the forming mold is the forming surface of the radar antenna cover base.

2. The molding structure of the high-sealing fiberglass reinforced plastic radar antenna cover base according to claim 1 is characterized in that: A gap is arranged between the forming die and the metal base.

3. A method for molding a high-sealing glass fiber reinforced plastic radar antenna cover base based on the molding structure described in claim 1 or 2, characterized in that The steps include: Step 1: Lay the outer skin on the inner side of the forming mold, and the outer skin extends between the forming mold and the metal base; Step 2: a honeycomb panel is arranged on the inner side of the outer skin, and both ends of the honeycomb panel are located on the top surface of the metal base; Step 3: Lay an inner skin on the inner side of the honeycomb panel, and the two ends of the inner skin respectively cover the top surface and the inner side surface of the metal base and extend to the sealing gasket; Step 4: After the inner skin, outer skin and metal base are solidified into one, remove the bolts to take off the metal base, and demold it from the forming mold to obtain the antenna cover base composed of the inner skin, outer skin, metal base and honeycomb panel.

4. The method for forming a high-sealing glass fiber reinforced plastic radar antenna cover base according to claim 3 is characterized in that: The outer skin and the inner skin are high-strength glass fiber composite panels.

5. The method for forming a high-sealing fiberglass reinforced plastic radar antenna cover base according to claim 3 or 4, characterized in that: The outer skin, the inner skin and the honeycomb panel are cured into one body with the metal base by using epoxy resin bonding and vacuum bagging molding process.

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