Carbon fiber deep-cavity thin-wall box mold

Abstract

The utility model discloses a carbon fiber deep-cavity thin-wall box body mould and a forming process thereof, the carbon fiber deep-cavity thin-wall box body mould comprises a bottom mould and a mould sealing plate covered above the bottom mould, a mould cavity is arranged in the bottom mould, a silica gel mould is arranged in the mould cavity, a negative pressure vacuum groove is arranged on the upper end face of the bottom mould along the circumferential direction of the mould cavity, and the mould sealing plate is arranged on the bottom mould. And a compressed air inlet source joint is arranged on the mold sealing plate and is communicated with the inner cavity of the silica gel mold. According to the scheme, a novel silica gel mold structure design is adopted, and hydraulic pressurization is replaced by pneumatic pressurization, so that the product percent of pass is increased, and the investment of production equipment is reduced; the silica gel mold has good elasticity and ductility, is suitable for forming deep-cavity thin-wall products in different shapes, and is convenient to demold after the products are formed.

Description

Technical Field

[0001] The utility model relates to the technical field of compression molds, in particular to a carbon fiber deep cavity thin-wall box body mold. Background Art

[0002] The carbon fiber deep cavity thin-walled box molding mold first lays the fiber prepreg on the mold cavity surface, and then closes the upper and lower metal molds, pressurizes and heats them to form and solidify them. The traditional composite material deep cavity thin-walled product mold has a small draft angle and is difficult to demold. There are mainly two serious problems: (1) Due to factors such as environmental and molding temperature changes, the product is tightly adsorbed or attached to the mold core surface when the mold is opened, and the product cannot be demolded. Manual tools are required for forced demolding. (2) Because the product surface is tightly adsorbed or attached to the mold core surface, it rubs against the mold cavity surface when the mold is opened, which can easily damage the product.

[0003] Traditional compression molding process equipment not only affects production efficiency, but also damages the mold and product during forced demoulding. Therefore, it is particularly important to design a compression molding process that can solve product demoulding and increase the service life of the mold. Summary of the invention

[0004] The utility model provides a carbon fiber deep cavity thin-wall box body mold, which aims to solve the problem of difficult demoulding of products and increase the service life of the mold.

[0005] The technical solution is as follows:

[0006] A carbon fiber deep cavity thin-wall box body mold, comprising a bottom mold and a mold sealing plate covered thereon, characterized in that a mold cavity is provided in the bottom mold, a silicone mold is provided in the mold cavity, a negative pressure vacuum groove is provided on the upper end surface of the bottom mold along the circumference of the mold cavity, and a compressed air inlet source connector is provided on the mold sealing plate, and is communicated with the inner cavity of the silicone mold.

[0007] Silicone molds have good elasticity and ductility, and can be used for molding deep-cavity thin-walled products of different shapes; the inner cavity of the silicone mold is pressurized by a compressed air circulation layer. The pressure of the compressed air can provide a pressure of about 37 tons according to the pressure of 0.5Mpa, which can replace the hydraulic press to meet the requirements of molding technology. The pressure on the silicone and raw materials is uniform through air pressure, and the raw materials are fully attached to the bottom mold, which improves the product qualification rate and reduces the production cost;

[0008] The negative pressure of the negative pressure vacuum tank adsorbs the frame of the silicone mold onto the bottom mold, and the pressure from the inner cavity of the silicone mold evenly squeezes the silicone mold, making it fit perfectly with the mold cavity, and the raw material is squeezed into shape by the bottom mold and the silicone mold.

[0009] Preferably, the body cavity shape of the silicone mold is adapted to the mold cavity, and the upper end surface of the silicone mold is turned outward to form a frame.

[0010] Preferably, the lower end surface of the frame of the silicone mold is covered with a negative pressure vacuum groove, and a certain gap is left between the upper end surface and the mold sealing plate.

[0011] Preferably, a negative pressure channel is provided in the bottom mold, one end of the negative pressure channel is connected to the bottom of the negative pressure vacuum groove, and the other end is connected to the outer wall of the lower end of the bottom mold, and a vacuum negative pressure connector is provided at the outlet.

[0012] The shape of the product box body is controlled according to the cross-sectional shape of the box body mold layer, and the silicone mold is used as the mold core. When the mold is opened after the molding is completed, the silicone mold retracts and effectively reduces the friction between the product and the mold cavity surface. The frame of the silicone mold completely covers the vacuum negative pressure groove, and the air in the vacuum negative pressure groove is extracted through the vacuum negative pressure joint to prevent the silicone mold from shifting.

[0013] Preferably, a circle of bolt holes is evenly arranged around the bottom mold, a circle of bolt holes is correspondingly arranged around the mold cover plate, the same longitudinal bolt is arranged between the bolt holes, and the bottom of the bolt passes through the bolt hole to connect with the nut.

[0014] A carbon fiber deep cavity thin-wall box forming process comprises the following steps:

[0015] S1, placing the carbon fiber raw material into the mold cavity of the bottom mold;

[0016] S2. Place the silicone mold so that it fits tightly against the carbon fiber raw material;

[0017] S3. Cover the mold cover plate, tighten the bolts and nuts, and close the bottom mold;

[0018] S4, connect the compressed air inlet source connector to the compressed air pipe; connect the vacuum negative pressure connector to the vacuum pipe;

[0019] S5, simultaneously inflating the compressed air circulation layer and evacuating the negative pressure vacuum tank;

[0020] S6, placing in an oven to solidify the product;

[0021] S7. Take out the silicone model and demould to obtain a carbon fiber deep cavity thin-wall box body.

[0022] Compared with the prior art, the utility model has the following beneficial effects:

[0023] A carbon fiber deep cavity thin-walled box mold using the above technical solution adopts a new silicone mold structure design and uses air pressure instead of hydraulic pressure to make the pressure on the silicone mold and the carbon fiber raw material uniform, which not only reduces the investment in production equipment but also improves the product qualification rate; the silicone mold is used as the mold core, which has good elasticity and ductility and is suitable for the molding of deep cavity thin-walled products of different shapes; at the same time, the silicone mold is a soft material, and the product can be directly removed by manual or robotic arms after molding, which directly solves the problem of product demolding; the silicone mold is adsorbed and fixed to the cavity surface of the lower mold through vacuum negative pressure to prevent displacement. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the structure of the utility model;

[0025] Figure 2 is a top view of the bottom mold;

[0026] Figure 3 It is a cross-sectional view of the utility model. DETAILED DESCRIPTION

[0027] The utility model is further described below in conjunction with embodiments and drawings.

[0028] like Figure 1 , Figure 2 As shown, a carbon fiber deep cavity thin-wall box body mold is mainly characterized in that the mold sealing plate 2 is a rectangular steel plate, a compressed air inlet source connector 5 is provided in the middle of the mold sealing plate 2, and a circle of bolt holes 10 are evenly provided around the mold sealing plate 2.

[0029] The bottom mold 1 is a rectangular structure with a mold cavity 4 dug inside. The shape of the mold cavity 4 is consistent with the shape of the box product. A negative pressure vacuum groove 7 is arranged on the upper end surface of the bottom mold 1 along the circumference of the mold cavity 4. The bottom of the negative pressure vacuum groove 7 is also provided with a negative pressure channel 8 connected to the bottom of the side wall of the bottom mold 1. The negative pressure channel 8 is located at the opening at the bottom of the side wall of the bottom mold 1 and is provided with a vacuum negative pressure joint 6.

[0030] A silicone mold 3 is arranged in the mold cavity 4, and the body cavity shape of the silicone mold 3 is adapted to the mold cavity 4. The upper end surface of the silicone mold 3 is turned outward to form a frame, and the lower end surface of the frame covers the negative pressure vacuum groove 7. A certain gap is left between the upper end surface and the mold sealing plate 2 to isolate the connecting space of the compressed air inlet source connector 5 and the connecting space of the vacuum negative pressure connector 6.

[0031] The bottom mold 1 is evenly provided with a circle of bolt holes 9 around it, and a groove is provided on the bottom mold 1 at the bottom of each bolt hole 9, and a nut is provided in the groove;

[0032] The bolt holes 10 of the mold sealing plate 2 correspond to the bolt through holes 9 of the bottom mold 1 one by one, and the same bolt 10 is passed through the bolt holes 10 and the bolt through holes 9, and the bottom of the bolt 10 passes through the bottom mold 1 and is tightly connected with the nut in the groove.

[0033] like Figure 3 As shown, a carbon fiber deep cavity thin-wall box body forming process includes the following steps:

[0034] S1, placing the carbon fiber raw material into the mold cavity 4 of the bottom mold 1;

[0035] S2, put the silicone mold 3 into the mold, so that it is closely attached to the carbon fiber raw material;

[0036] S3, cover the mold cover plate 2, tighten the bolts 11 and nuts, and close the bottom mold 1;

[0037] S4, connect the compressed air inlet source connector 5 to the compressed air pipe; connect the vacuum negative pressure connector 6 to the vacuum pipe;

[0038] S5, start the equipment, and simultaneously inflate the inner cavity of the silicone mold 3 and evacuate the negative pressure vacuum tank 7;

[0039] S6, placing in an oven to solidify the product;

[0040] S7. Take out the silicone model and demould to obtain a carbon fiber deep cavity thin-wall box body.

[0041] Finally, it should be noted that the above description is only a preferred embodiment of the present invention. Under the guidance of the present invention, ordinary technicians in this field can make a variety of similar expressions without violating the purpose and claims of the present invention, and such changes fall within the scope of protection of the present invention.

Claims

1. A carbon fiber deep cavity thin-wall box body mold, comprising a bottom mold (1) and a mold cover plate (2) mounted on the top thereof, characterized in that: The bottom mold (1) is provided with a mold cavity (4), a silicone mold (3) is provided in the mold cavity (4), a negative pressure vacuum groove (7) is provided on the upper end surface of the bottom mold (1) along the circumference of the mold cavity (4), and a compressed air inlet source connector (5) is provided on the mold sealing plate (2) and communicates with the inner cavity of the silicone mold (3).

2. The carbon fiber deep cavity thin wall box mold according to claim 1, characterized in that: The body cavity shape of the silicone mold (3) is adapted to the mold cavity (4), and the upper end surface of the silicone mold (3) is turned outward to form a frame.

3. The carbon fiber deep cavity thin wall box mold according to claim 2, characterized in that: The lower end surface of the frame of the silicone mold (3) is covered with a negative pressure vacuum groove (7), and a certain gap is left between the upper end surface and the mold sealing plate (2).

4. The carbon fiber deep cavity thin wall box mold according to claim 1, characterized in that: A negative pressure channel (8) is provided in the bottom mold (1), one end of the negative pressure channel (8) is connected to the bottom of the negative pressure vacuum groove (7), the other end is connected to the outer wall of the lower end of the bottom mold (1), and a vacuum negative pressure joint (6) is provided at the outlet.

5. The carbon fiber deep cavity thin wall box mold according to claim 1, characterized in that: The bottom mold (1) is evenly provided with a circle of bolt holes (9) around it, and the mold cover plate (2) is correspondingly provided with a circle of bolt holes (10) around it. The same longitudinal bolts (11) are provided between the bolt holes (9) and the bolt holes (10), and the bottom of the bolts (11) pass through the bolt holes (9) to connect with nuts.

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