Near-net-shaping mold and molding method for radome

Abstract

The invention relates to a near-net molding mold for a radome and a molding method. The molding mold is composed of a main mold, an outer mold, a long bead, and a short bead; the molding process includes the following steps: (1) cleaning the mold; (2) turning the outer mold ; (3) Honeycomb shaping; (4) Laying radome material; (4) Part molding; (5) Demolding and post-processing. The invention realizes the low-pressure molding of the high-pressure forming radome through the use of the variable-section bead, and avoids the phenomenon of high porosity and low fiber content in the conventional low-pressure forming technology of the radome; through the integration of the metal male mold and the outer mold The combined use of the combination and the high-precision guarantee of the mold realize the near-net size and high-precision molding of the radome, avoiding the secondary machining damage and corner glue accumulation in the existing molding method; through the vacuum bag pressure co-curing molding technology , realizing low-cost production of radome.

Description

technical field [0001] The invention belongs to the three technical fields of machinery, materials and electromagnetism, and relates to the molding technology of radome, in particular to a near-net molding mold and molding method for radome, which is mainly applied to radome systems requiring high dimensional accuracy of inner and outer surfaces. Background technique [0002] The radome is a functional structural part that protects the antenna system or the entire microwave system inside the hood from external damage and destruction. It has the functions of wave penetration, load bearing, impact resistance, heat insulation, and weather resistance. [0003] At present, the radome molding methods mainly include autoclave method, vacuum bag pressing method and molding method. The autoclave method refers to placing the composite material blank in an autoclave and forming the radome through high temperature and high pressure molding. The vacuum bag pressing method refers to vacu...

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Problems solved by technology

[0004] (1) When the radome is formed by the autoclave method, the dimensional accuracy of the non-mold contact surface of the radome is poor, and the product has secondary machining or manual grinding processes, which may easily cause fiber breakage and honeycomb damage. It is not suitable for thin-walled sandwich structure antennas cover molding

[0005] (2) When the radome is formed by vacuum bag pressing method, the forming pressure of the radome is relatively small (≤0.1MPa), and the product has disadvantages such as high porosity and low fiber content, so it is not suitable for radome molding with high forming pressure

[0006] (3) When the radome is formed by molding method, the molding pressure at the side wall of the radome cavity is small and the transmission is uneven, and the product has defects such as fiber wrinkles, glue accumulation, and incomplete compaction, which is not suitable for the structure with an inner cavity Radome Molding

[0007] The radome of a certain product has a cavity sandwich structure, the thickness of the inner and outer skins is 0.3mm, and the thickness is thin. The parts need to meet the requirements of more than 95% wave transmission rate, 40g high overload and high dimensional accuracy. Trial requirements

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