Vacuum infusion forming device for carbon fiber composite board with two smooth and flat faces

Abstract

The utility model relates to a vacuum infusion forming device for a carbon fiber composite plate with two smooth and flat surfaces. The vacuum infusion forming device comprises a glass plate, an outer vacuum bag film and an inner vacuum bag film, the outer vacuum bag film is connected with the glass plate to form a first space; the inner vacuum bag film is positioned in the first space and is connected with the glass plate to form a second space; the area of the glass plate in the second space serves as a forming area; a carbon fiber fabric is laid on the forming area, the forming area comprises a perforated glass plate pressed on the carbon fiber fabric, and a through hole is formed in the middle area of the perforated glass plate; the forming area comprises a flow guide pipe which is annularly arranged around the carbon fiber fabric; demolding cloth is further laid on the flow guide pipes and on the periphery of the carbon fiber fabric, and a flow guide net is laid on the demolding cloth. By utilizing the design that the glass plate and the perforated glass plate are matched with the double-layer vacuum bag film, the formed carbon fiber composite plate is smooth and flat in double surfaces, uniform in resin distribution, simple in overall structure and high in forming efficiency.

Description

Technical Field

[0001] The utility model relates to the field of composite material molding, in particular to a vacuum introduction molding device for a double-sided smooth and flat carbon fiber composite plate. Background Art

[0002] Carbon fiber is widely used in various lightweight fields, aerospace, rail transportation, wind power generation and other infrastructure construction fields, as well as other corrosion-resistant and high-temperature-resistant protection fields due to its excellent physical and chemical properties such as high modulus, high strength, low density and light weight, chemical corrosion resistance, and high temperature resistance. However, with the large-scale application of carbon fiber, how to give full play to its performance characteristics has received great attention, which has placed high demands on the carbon fiber molding process. However, the more traditional carbon fiber composite plate molding process has many technical defects and the molding process is expensive. For example, the traditional hand lay-up process has low molding efficiency, wastes raw materials, cannot effectively guarantee product quality, and has a poor production environment and is not operator-friendly.

[0003] The Vacuum Infusion Process (VIP), a relatively high-performance, low-cost molding technology, has experienced rapid development in recent years. The specific molding method involves placing the fiber-reinforced material directly onto the mold, placing a release cloth and a flow-guide mesh over the fiber-reinforced material, and sealing it with a vacuum film. Using vacuum pressure, the resin is injected and impregnated into the reinforcing material, ultimately filling the entire mold. After curing, the vacuum material is removed, leaving the desired product on the mold.

[0004] However, for carbon fiber composite panels, the smoothness and flatness of products made from carbon fibers of different specifications through the traditional vacuum introduction process vary greatly. For example, small-tow carbon fiber fabrics are relatively "soft", resulting in inconsistent thickness and poor flatness of the products, which greatly reduces the strength of the products and cannot fully exert the performance of the carbon fibers, causing serious impact on the mechanical properties and appearance of the composite materials. Utility Model Content

[0005] In order to solve the above technical problems, the utility model provides a vacuum introduction molding device for carbon fiber composite panels with smooth and flat double sides. By utilizing the design of glass flat plates, perforated glass flat plates and double-layer vacuum bag film, the molded carbon fiber composite panels are smooth and flat on both sides, the resin is evenly distributed, the overall structure is simple, and the molding efficiency is high.

[0006] The technical solution adopted by the utility model to solve its technical problems is: a vacuum introduction molding device for a double-sided smooth and flat carbon fiber composite panel, comprising a glass plate, an outer vacuum bag film, and an inner vacuum bag film; the outer vacuum bag film is connected to the glass plate to form a first space; the inner vacuum bag film is located in the first space and connected to the glass plate to form a second space; the area of ​​the glass plate in the second space serves as a molding area; the molding area is used to lay carbon fiber fabric, the molding area also includes an open-pore glass plate pressed on the carbon fiber fabric, and the middle area of ​​the open-pore glass plate is provided with a through hole; the molding area also includes a guide tube arranged around the carbon fiber fabric; a release cloth is laid on the guide tube and around the carbon fiber fabric, and a guide net is laid on the release cloth.

[0007] Furthermore, the outer vacuum bag film and the inner vacuum bag film are respectively connected to the glass plate via sealing strips.

[0008] Furthermore, the inner vacuum bag film is connected to a first air tube, one end of the first air tube extending into the inner vacuum bag film is connected to the through hole of the perforated glass plate; the first air tube is provided with a first valve, and the first air tube is used to connect to the vacuum equipment to evacuate the second space.

[0009] Furthermore, the outer vacuum bag film is connected to a second air pipe, the second air pipe is provided with a second valve, and the second air pipe is used to connect to a vacuum device to evacuate the first space.

[0010] Furthermore, a pressure gauge is provided on the air pipe connected to the vacuum device.

[0011] Furthermore, the flow guide tube is also connected to a glue injection tube.

[0012] Furthermore, the length of each side of the perforated glass plate is 30-50 mm smaller than the corresponding length of the carbon fiber fabric.

[0013] Furthermore, the position where the outer vacuum bag film is connected to the glass plate is spaced 50-60 mm from the position where the inner vacuum bag film is connected to the glass plate.

[0014] The beneficial effects of the utility model are as follows: the utility model provides a vacuum introduction molding device for a carbon fiber composite plate with smooth and flat double sides, which utilizes a glass flat plate, a perforated glass flat plate and a double-layer vacuum bag film design. The molded carbon fiber composite plate has smooth and flat double sides, the resin is evenly distributed, the overall structure is simple, and the molding efficiency is high. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 Schematic top view of a vacuum infusion molding device for a double-sided smooth and flat carbon fiber composite plate according to an embodiment;

[0016] Figure 2 for Figure 1 Schematic cross-sectional view of AA;

[0017] Among them, 1-glass plate, 2-outer vacuum bag film, 3-inner vacuum bag film, 4-guide tube, 5-mold release cloth, 6-guide net, 7-carbon fiber fabric, 8-perforated glass plate, 9-first air pipe, 10-first valve, 11-second air pipe, 12-second valve, 13-pressure gauge, 14-glue injection hose. DETAILED DESCRIPTION

[0018] In order to deepen the understanding of the present invention, the present invention will be described in further detail below with reference to the accompanying drawings and embodiments. The embodiments are only used to explain the present invention and do not limit the scope of protection of the present invention.

[0019] Example

[0020] Please refer to Figure 1 and Figure 2 As shown, this embodiment provides a vacuum infusion molding device for a double-sided smooth and flat carbon fiber composite panel, comprising a glass plate 1, an outer vacuum bag film 2, and an inner vacuum bag film 3; the outer vacuum bag film 2 is connected to the glass plate 1 to form a first space; the inner vacuum bag film 3 is located in the first space and connected to the glass plate 1 to form a second space; the area of ​​the glass plate 1 in the second space serves as a molding area; the molding area is used to lay a carbon fiber fabric 7, and the molding area also includes an open-pore glass plate 8 pressed on the carbon fiber fabric 7, and a through hole is opened in the middle area of ​​the open-pore glass plate; the molding area also includes a guide tube 4 arranged around the carbon fiber fabric; a release cloth 5 is laid on the guide tube 4 and around the carbon fiber fabric 7, and a guide net 6 is laid on the release cloth 5.

[0021] Refer again Figure 2 As shown, the outer vacuum bag film 2 and the inner vacuum bag film 3 are respectively connected to the glass plate 1 through sealing strips.

[0022] In this embodiment, the inner vacuum bag film 3 is connected to a first air pipe 9, one end of which extends into the inner vacuum bag film 3 and is connected to the through hole of the perforated glass plate 8; the first air pipe 9 is provided with a first valve 10, and the first air pipe is used to connect to a vacuum device to evacuate the second space; the outer vacuum bag film 2 is connected to a second air pipe 11, and the second air pipe 11 is provided with a second valve 12, and the second air pipe 11 is used to connect to a vacuum device to evacuate the first space; the air pipe connected to the vacuum device is also provided with a pressure gauge 13 to display the vacuum degree.

[0023] In this embodiment, the flow guide tube 4 is further connected to a glue injection tube 14 .

[0024] In this embodiment, the length of each side of the perforated glass plate 8 is 30-50 mm smaller than the corresponding side length of the carbon fiber fabric; the position where the outer vacuum bag film 2 and the glass plate 1 are connected is 50-60 mm away from the position where the inner vacuum bag film 3 and the glass plate 1 are connected.

[0025] The forming method of the vacuum infusion forming device of the double-sided smooth and flat carbon fiber composite plate of this embodiment is specifically carried out in the following steps:

[0026] Prepare a glass plate and apply a release agent on the side of the glass plate that contacts the carbon fiber fabric;

[0027] Prepare a perforated glass plate, and apply a release agent on the side of the perforated glass plate that contacts the carbon fiber fabric;

[0028] The carbon fiber fabric is laid on the forming area of ​​the glass plate and compacted with a perforated glass plate after laying. The side length of the fabric is 30-50 mm larger than the corresponding side length of the perforated glass plate.

[0029] Arrange flow guide tubes around the carbon fiber fabric, and then lay a release cloth and a flow guide net above the flow guide tubes and above the portion of the carbon fiber fabric exposed outside the perforated glass plate;

[0030] Prepare the inner vacuum bag film and fix it to the outer area of ​​the forming area on the glass plate using sealing strips;

[0031] Prepare the outer vacuum bag and secure it to the outer area of ​​the inner vacuum bag on the glass plate using sealing tape, with a 50-60mm gap between the outer and inner vacuum bag locations. Simultaneously, install the first and second air pipes, with the end of the second air pipe extending into the inner vacuum bag connected to the through-hole of the perforated glass plate. Connect the first and second air pipes to the main air pipe via a tee, which is connected to a vacuum pump. A pressure gauge is installed on the main air pipe.

[0032] First, the second space is evacuated and maintained in a vacuum state using a vacuum pump and a first air pipe; the glue inlet pipe is opened, and under the negative pressure of the vacuum, the resin passes through the guide pipe in sequence from the glue inlet pipe and then impregnates the carbon fiber fabric; at this time, the impregnation state can be observed through a transparent perforated glass plate; when the impregnation is completed, the first valve on the first air pipe is closed to prevent the loss and waste of resin; then, the second valve on the second air pipe is opened, the first space is evacuated and maintained in a vacuum state, so that the resin-impregnated carbon fiber fabric is cured in a vacuum state to obtain a carbon fiber composite board; the obtained carbon fiber composite board has smooth and flat surfaces on both sides, is beautiful and has stable performance.

[0033] The above embodiments should not limit the present invention in any way, and any technical solutions obtained by equivalent replacement or equivalent conversion fall within the protection scope of the present invention.

Claims

1. A vacuum infusion molding device for double-sided smooth carbon fiber composite panels, characterized by: The invention comprises a glass plate (1), an outer vacuum bag film (2), and an inner vacuum bag film (3); the outer vacuum bag film (2) is connected to the glass plate (1) to form a first space; the inner vacuum bag film (3) is located in the first space and is connected to the glass plate (1) to form a second space; the area of ​​the glass plate (1) in the second space serves as a forming area; the forming area is used for laying carbon fiber fabric (7), and the forming area also includes an open-hole glass plate (8) pressed on the carbon fiber fabric (7), and a through hole is opened in the middle area of ​​the open-hole glass plate (8); the forming area also includes a guide tube (4) arranged around the carbon fiber fabric; a demoulding cloth (5) is laid on the guide tube (4) and around the carbon fiber fabric (7), and a guide net (6) is laid on the demoulding cloth (5).

2. The vacuum infusion molding device for a double-sided smooth and flat carbon fiber composite plate according to claim 1, characterized in that: The outer vacuum bag film (2) and the inner vacuum bag film (3) are respectively connected to the glass plate (1) via sealing strips.

3. The vacuum infusion molding device for a double-sided smooth carbon fiber composite plate according to claim 1, characterized in that: The inner vacuum bag film (3) is connected to a first air pipe (9), one end of the first air pipe (9) extending into the inner vacuum bag film (3) is connected to a through hole of the perforated glass plate (8); the first air pipe (9) is provided with a first valve (10), and the first air pipe (9) is used to connect to a vacuum device, thereby evacuating the second space.

4. The vacuum infusion molding device for a double-sided smooth and flat carbon fiber composite plate according to claim 1, characterized in that: The outer vacuum bag film (2) is connected to a second air pipe (11), the second air pipe (11) is provided with a second valve (12), and the second air pipe (11) is used to connect to a vacuum device to evacuate the first space.

5. The vacuum infusion molding device for double-sided smooth carbon fiber composite panels according to claim 3 or 4, characterized in that: A pressure gauge (13) is also provided on the air pipe connected to the vacuum device.

6. The vacuum infusion molding device for double-sided smooth carbon fiber composite panels according to claim 1, characterized in that: The flow guide tube (4) is also connected to a glue injection tube (14).

7. The vacuum infusion molding device for double-sided smooth carbon fiber composite panels according to claim 1, characterized in that: The length of each side of the perforated glass plate (8) is 30-50 mm smaller than the corresponding side length of the carbon fiber fabric.

8. The vacuum infusion molding device for double-sided smooth carbon fiber composite panels according to claim 7, characterized in that: The position where the outer vacuum bag film (2) and the glass plate (1) are connected is spaced 50-60 mm from the position where the inner vacuum bag film (3) and the glass plate (1) are connected.

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