RTM (resin transfer molding) process preformed body integrated shaping device

Abstract

The utility model discloses an integrated shaping device for an RTM (Resin Transfer Molding) process preform. The integrated shaping device comprises a device main body, the preform platform is arranged in the device main body and is used for placing a paved preform; the membrane assembly is arranged in the device main body and is used for forming a sealed space with the preform platform, and the paved preform is positioned in the sealed space; the vacuum unit is used for vacuumizing the sealed space; and the blowing unit is used for conveying air with a set temperature into the device main body. The device is used for auxiliary material laying, sealing bag making, vacuumizing and heat setting procedures after manual laying of the preformed body in the RTM technology, integration of multiple procedures and rapid bag making, rapid heating and rapid cooling of the preformed body are achieved, the heat setting time of the preformed body is greatly shortened, and the production efficiency is improved. The manufacturing efficiency is improved; and the manufacturing cost is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of composite material forming, and in particular relates to an integrated shaping device for preforms in an RTM process. Background Art

[0002] The RTM (Resin Transfer Molding) process, known as resin transfer molding, is widely used for complex aerospace components due to its excellent mechanical properties. Its principle involves placing a fiber-reinforced preform, prepared according to structural and performance requirements, into a mold cavity. Liquid resin is then injected into the closed mold cavity using an injection device. The resin flows, discharging air from the cavity and impregnating the fibers. The preform is then cured by heating and then released from the mold after cooling, resulting in a composite component that meets load-bearing requirements. The preform preparation process includes preform placement, heat setting, and assembly. Traditionally, preform preparation involves manually laying dry fabric on the mold surface, then applying auxiliary materials and creating a sealing bag. Finally, the mold is placed in a curing oven, evacuated, and heat-set according to the curing schedule. Existing RTM processes suffer from numerous steps, complex operations, and high labor and equipment energy consumption. These factors result in low efficiency and high costs for molding complex structural parts using RTM, significantly limiting its development. Utility Model Content

[0003] In order to address the deficiencies in the prior art, the present invention provides an integrated shaping device for RTM process preforms, which is used for auxiliary material laying, sealing bag making, vacuuming and heat shaping processes after the preforms are manually laid in the RTM process. It realizes the integration of multiple processes and rapid bag making, rapid heating and rapid cooling of preforms, greatly shortens the heat shaping time of preforms, improves manufacturing efficiency and reduces manufacturing costs. It has the characteristics of simple structure, easy operation and low energy consumption, improves the efficiency of RTM process in forming complex structural parts, reduces production costs, and is conducive to the development of RTM process.

[0004] In order to achieve the above-mentioned purpose, the technical solution adopted by the present invention is: an integrated shaping device for RTM process preforms, comprising: a device body; a preform platform arranged in the device body for placing the preform after laying; a membrane component arranged in the device body for forming a sealed space with the preform platform, and the preform after laying is located in the sealed space; a vacuum unit for evacuating the sealed space; and a blowing unit for delivering air of a set temperature into the device body.

[0005] Furthermore, the membrane assembly includes: a liftable beam connected to the device body; and a silicone rubber film installed on the liftable beam.

[0006] Furthermore, a corrugated air-guiding pattern is provided on the surface of the silicone rubber film that contacts the preformed body after laying.

[0007] Furthermore, a sealing material is provided on a side of the preform platform facing the silicone rubber film.

[0008] Furthermore, a door is provided on the device body for feeding the preformed bodies after laying into the device body and for removing the preformed bodies after shaping out of the device body.

[0009] Furthermore, the preform platform is slidably connected to the device body via a slide rail assembly.

[0010] Furthermore, the air blowing unit delivers air of a set temperature into the device body through an air supply port provided on the device body, and the air supply port and the preform platform are respectively located on both sides of the membrane assembly.

[0011] Furthermore, the blowing unit includes an electric heater for adjusting the air temperature.

[0012] Compared with the existing technology, the beneficial effects achieved by the present invention are as follows: the present invention arranges a preform platform, a membrane assembly, a vacuum unit and a blowing unit in the main body of the device, the membrane assembly and the preform platform form a sealed space, and the preform after laying is located in the sealed space; the auxiliary material laying, sealing bag making, vacuuming and heat setting processes after the preform is manually laid are integrated. Compared with the traditional manual laying of auxiliary materials, manual sealing bag making and heat setting in a curing furnace, the preform can be quickly bagged and quickly heated and cooled during heat setting, which greatly shortens the heat setting time of the preform, improves efficiency and reduces labor and equipment costs. It has the characteristics of simple structure, easy operation, low energy consumption, etc., which improves the efficiency of RTM process in forming complex structural parts and is conducive to the development of RTM process. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a structural schematic diagram of an integrated shaping device for preforms in an RTM process provided by an embodiment of the present utility model;

[0014] In the figure: 1. Device body; 2. Blowing unit; 3. Silicone rubber film; 4. Preform platform; 5. Door; 6. Liftable beam; 7. Vacuum unit. DETAILED DESCRIPTION

[0015] The present invention will be further described below in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention and are not intended to limit the scope of protection of the present invention.

[0016] like Figure 1As shown, an integrated shaping device for preforms in an RTM process includes: a device body 1, a blast unit 2, a silicone rubber film 3, a preform platform 4, a door 5, a liftable beam 6 and a vacuum unit 7.

[0017] A preform platform 4 is provided within the apparatus body 1 for placing preforms after placement. A door 5 is provided on the apparatus body 1 for feeding preforms into the apparatus body 1 after placement and removing preforms after shaping. The preform platform 4 is slidably connected to the apparatus body 1 via a slide rail assembly, which allows the preform platform 4 to be easily pushed into or out of the apparatus body 1.

[0018] The membrane assembly is disposed within the apparatus body 1 and forms a sealed space with the preform platform 4. The preform after placement is located within the sealed space. A vacuum unit 7 is used to evacuate the sealed space. The membrane assembly comprises a liftable beam 6 connected to the apparatus body 1 and a silicone rubber film 3 mounted on the liftable beam 6. The surface of the silicone rubber film 3 that contacts the preform after placement is provided with corrugated air-guiding patterns to enhance the vacuuming effect. A sealing material is provided on the side of the preform platform 4 facing the silicone rubber film 3 to enhance the sealing effect of the sealed space.

[0019] The blower unit 2 is used to deliver air at a set temperature into the apparatus body 1. The blower unit delivers air at a set temperature into the apparatus body 1 through an air supply port provided on the apparatus body 1. The air supply port and the preform platform 4 are located on either side of the membrane assembly. The blower unit includes an electric heater for regulating the air temperature.

[0020] After the preform is laid, it is moved onto the preform platform 4. Door 5 is closed, and the height of the elevating beam 6 is controlled by the automatic height adjustment unit. The elevating beam 6 is lowered until it contacts the preform platform 4, creating a sealed atmosphere. The vacuum system 7 is activated, and the silicone rubber film 3 adheres to the surface of the laid preform under the vacuum. The blast unit 2 is activated to increase the temperature and complete heat setting. After setting, the temperature of the blast unit 2 is adjusted to achieve rapid cooling.

[0021] The present invention integrates the auxiliary material laying, sealing bag making, vacuuming and heat setting processes after the preform is manually laid. Compared with the traditional manual laying of auxiliary materials, manual sealing bag making and heat setting in a curing furnace, the present invention can realize rapid bag making of the preform and rapid heating and cooling of the heat setting, which greatly shortens the heat setting time of the preform, improves efficiency and reduces labor and equipment costs.

[0022] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. An integrated shaping device for RTM process preforms, characterized in that: include: Device body (1); A preform platform (4) provided in the device body (1) for placing the preform after laying; A membrane assembly is provided in the device body (1) and is used to form a sealed space with the preform platform (4), and the preform after laying is located in the sealed space; A vacuum unit (7) for evacuating the sealed space; A blower unit (2) is used to deliver air of a set temperature into the device body (1).

2. The RTM process preform integrated shaping device according to claim 1, characterized in that: The membrane assembly comprises: A liftable beam (6) connected to the device body (1); A silicone rubber film (3) is mounted on the liftable beam.

3. The RTM process preform integrated shaping device according to claim 2, characterized in that: A corrugated air-guiding pattern is provided on the surface of the silicone rubber film (3) that contacts the preformed body after paving.

4. The RTM process preform integrated shaping device according to claim 2, characterized in that: A sealing material is provided on the side of the preform platform (4) facing the silicone rubber film (3).

5. The RTM process preform integrated shaping device according to claim 1, characterized in that: The device body (1) is provided with a door (5) for feeding the preformed body after laying into the device body (1) and for removing the preformed body after shaping from the device body (1).

6. The RTM process preform integrated shaping device according to claim 5, characterized in that: The preform platform (4) is slidably connected to the device body (1) via a slide rail assembly.

7. The RTM process preform integrated shaping device according to claim 1, characterized in that: The air blowing unit (2) delivers air of a set temperature into the device body (1) through an air supply port provided on the device body (1), and the air supply port and the preform platform (4) are respectively located on both sides of the membrane assembly.

8. The RTM process preform integrated shaping device according to claim 1, characterized in that: The air blowing unit includes an electric heater for adjusting the temperature of the air.

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