Integrated glassy carbon hybrid wave-transparent plate and preparation method and preparation mold thereof

Abstract

The present invention discloses a mold for preparing an integrated glass-carbon hybrid wave-transmitting plate, comprising a frame, a lower mold and an upper mold, wherein the upper mold can be detachably arranged on the upper side of the frame, and the lower mold can be detachably arranged on the lower side of the frame, so that a mold cavity is formed between the upper mold and the lower mold; the upper mold comprises an upper mold plate and two upper mold seats detachably arranged on both sides of the upper mold plate, the two upper mold seats protrude from the upper mold plate toward the lower mold, and an upper groove is formed between the two upper mold seats; the lower mold comprises a lower mold plate and two lower mold seats detachably arranged on both sides of the lower mold plate, the two lower mold seats protrude from the lower mold plate toward the upper mold, and a lower groove is formed between the two lower mold seats. The various structures of the mold are detachably connected, and splicing technology is adopted to facilitate mold assembly, so that an integrated glass-carbon hybrid wave-transmitting plate with light weight and high strength can be produced, and the cost can be reduced. The present application also provides an integrated glass-carbon hybrid wave-transmitting plate and a preparation method thereof.

Description

Technical Field

[0001] The present invention relates to the technical field of aerospace materials, and more specifically to an integrated glassy-carbon hybrid wave-transparent plate and a preparation method and a preparation mold thereof. Background Art

[0002] In recent years, countries have been conducting research on various types of near-space airships. Near-space airships are a new type of low-cost, low-energy aircraft. Their load capacity determines their key role and has become a key technology. Generally speaking, the payload cabin wave-transmitting plate is both a payload cabin structural component and a radar mounting component. Most of them are made of glass fiber materials. In terms of strength, carbon fiber is about 10 times that of glass fiber, and in terms of weight, carbon fiber is only 70% of glass fiber. Under the same strength conditions, the general wave-transmitting plate is nearly 2 times heavier than the hybrid sound-transmitting plate. In order to achieve the effect of light weight and high strength and improve the utilization value of the airship, it is necessary to study a lightweight and high-strength glass-carbon hybrid wave-transmitting plate for near-space airships to solve the above bottleneck problem. Summary of the invention

[0003] One of the purposes of the present invention is to provide a mold for preparing an integrated glass-carbon hybrid wave-transmitting plate, which can produce an integrated glass-carbon hybrid wave-transmitting plate with light weight and high strength.

[0004] The second object of the present invention is to provide a method for preparing an integrated glass-carbon hybrid wave-transmitting plate using the above mold. The method is relatively simple, has good finished product quality, high finished product strength, light weight, low manufacturing cost, and high manufacturing efficiency.

[0005] The third object of the present invention is to provide an integrated glass-carbon hybrid wave-transmitting plate made by the above method.

[0006] In order to achieve the above-mentioned object, the present invention discloses a mold for preparing an integrated glass-carbon hybrid wave-transmitting plate, comprising a frame, a lower mold and an upper mold, wherein the upper mold is detachably arranged on the upper side of the frame, and the lower mold is detachably arranged on the lower side of the frame, so that a mold cavity is formed between the upper mold and the lower mold;

[0007] The upper mold comprises an upper mold plate and two upper mold seats detachably arranged on both sides of the upper mold plate, the two upper mold seats protrude from the upper mold plate toward the lower mold and form an upper groove between the two upper mold seats;

[0008] The lower mold comprises a lower mold plate and two lower mold seats detachably arranged on both sides of the lower mold plate. The two lower mold seats protrude from the lower mold plate toward the upper mold and form a lower groove between the two lower mold seats.

[0009] Preferably, the upper die base comprises an upper connecting portion and an upper die frame, the upper connecting portion is in a Z-shaped structure, one side of the upper connecting portion is detachably connected to the upper die base, and the other side of the upper connecting portion is detachably connected to the upper die plate;

[0010] The lower die base comprises a lower connecting portion and a lower die frame, wherein the lower connecting portion is in a Z-shaped structure, one side of the lower connecting portion is detachably connected to the lower die base, and the other side of the lower connecting portion is detachably connected to the lower die plate.

[0011] Preferably, the upper connecting portion comprises an upper first portion, an upper second portion and an upper third portion, the upper first portion is bent and extended upward to form the upper second portion, the upper second portion is bent and extended along the direction of the upper template to form the upper third portion, the upper third portion is provided with a first recess, the upper template is provided with a second recess matched with the first recess, the upper mold frame is provided with an upper lug portion matched with the upper first portion, and the upper end of the upper lug portion is flush with the upper end of the upper second portion;

[0012] The lower connecting portion includes a lower first portion, a lower second portion and a lower third portion, the lower first portion is bent and extended downward to form the lower second portion, the lower second portion is bent and extended along the direction of the lower template to form the lower third portion, the lower third portion is provided with a third recess, the lower template is provided with a fourth recess matched with the third recess, the lower mold frame is provided with a lower lug portion matched with the lower first portion, and the bottom end of the lower lug portion is flush with the bottom end of the lower second portion.

[0013] Accordingly, the present application also provides a method for preparing an integrated glass-carbon hybrid wave-transmitting plate, which is carried out using the above-mentioned mold, and the steps are as follows:

[0014] (1) placing the lower mold on the lower side of the frame, and laying glass fiber prepreg layers in the lower groove until it is full, thereby obtaining a first thickened portion;

[0015] (2) continuing to lay a layer of glass fiber prepreg on the surface of the first thickened portion, and laying a layer of carbon fiber prepreg at both ends of the glass fiber prepreg, with a certain distance between the two carbon fiber prepregs and a first overlapping portion with the glass fiber prepreg;

[0016] (3) laying a layer of glass fiber prepreg on the surface of the two carbon fiber prepregs, and then laying a layer of carbon fiber prepreg on both ends of the glass fiber prepreg, with a certain distance between the two carbon fiber prepregs and a second overlapping portion with the glass fiber prepreg;

[0017] A layer of glass fiber prepreg is continuously laid on the surface of the two carbon fiber prepregs, and then a layer of carbon fiber prepreg is laid on both ends of the glass fiber prepreg, with a certain distance between the two carbon fiber prepregs and a first overlapping portion with the glass fiber prepreg;

[0018] (4) Repeat step (3) until it is flush with the upper side of the frame, and three-dimensionally sew the overlapping parts of the glass fiber prepreg cloth and the carbon fiber prepreg cloth through the carbon fiber prepreg yarn to obtain a glass-carbon mixed part;

[0019] (5) continuing to lay glass fiber prepreg layer by layer on the surface of the middle part of the glass-carbon mixed part to a predetermined thickness, thereby obtaining a second thickened part;

[0020] (6) installing the upper mold plate and the two upper mold seats on the upper side of the frame, with the second thickened portion located in the upper groove;

[0021] (7) Placing the mold in a vacuum environment for vacuuming and performing a heating and curing treatment to obtain a product.

[0022] Preferably, carbon fiber prepreg is used to lay the intersections of the first thickened portion, the second thickened portion and the glass-carbon mixed portion to form chamfered portions.

[0023] Preferably, the overlapping lengths of the first overlapping portion and the second overlapping portion are different.

[0024] Correspondingly, the present application also provides an integrated glass-carbon hybrid wave-transparent plate, which is prepared by the above-mentioned preparation method.

[0025] The beneficial effects of this application are:

[0026] (1) The various structures of the mold are detachably connected, and the splicing technology is adopted to facilitate mold assembly and product preparation, thereby reducing costs;

[0027] (2) By assembling the various parts of the mold, the upper mold and the lower mold are mutually limited and squeezed to remove the bubbles inside the fiber, thereby improving the quality and yield of the wave-transmitting board;

[0028] (3) The glass-carbon hybrid part is made of glass fiber and carbon fiber laid in an alternating manner, which greatly reduces the structural weight while ensuring strength and wave transmission performance.

[0029] (4) using vacuum technology to integrally solidify the first thickened portion, the second thickened portion, and the glassy carbon mixed portion in the mold to enhance the strength of the glassy carbon critical portion;

[0030] (5) Carbon fiber prepreg is used at the junction of the first thickened part and the second thickened part with the glass-carbon mixed part to form a chamfered part to avoid stress concentration;

[0031] (6) The overlapping parts of the glass fiber prepreg and the carbon fiber prepreg are three-dimensionally stitched by the carbon fiber prepreg yarn, which increases the strength of the glass-carbon critical part and makes the glass-carbon mixed part evenly stressed. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 This is a schematic structural diagram of a mold for preparing an integrated glass-carbon hybrid wave-transmitting plate of the present invention.

[0033] Figure 2 for Figure 1 Cross-sectional view of .

[0034] Figure 3 for Figure 2 A cross-sectional view of the hidden glass-carbon hybrid wave-transmitting panel.

[0035] Figure 4 for Figure 1 The exploded view of the mold used to prepare the integrated glass-carbon hybrid wave-transmitting panel is shown.

[0036] Figure 5 It is an exploded view of the lower mold of the present invention.

[0037] Figure 6 It is an exploded view of the upper mold of the present invention.

[0038] Figure 7 It is a schematic diagram of the laying of the first thickened portion, the glassy carbon mixed portion, the second thickened portion and the chamfered portion during the preparation method of the present invention.

[0039] Explanation of symbols

[0040] Frame 10, mold cavity 20, lower mold 30, lower mold plate 31, fourth recess 311, lower mold base 33, lower connecting portion 331, lower first portion 3311, lower second portion 3313, lower third portion 3315, third recess 3317, lower mold frame 333, lower convex ear portion 3331, lower groove 35, upper mold 50, upper mold plate 51, second recess 511, upper mold base 53, upper connecting portion 531, upper first portion 5311, upper second portion 5313, upper third portion 5315, first recess 5317, upper mold frame 533, upper convex ear portion 5331, upper groove 55, mold 100

[0041] Glass fiber prepreg 60, carbon fiber prepreg 70, carbon fiber prepreg 80, first thickened portion 81, glass-carbon mixed portion 83, second thickened portion 85, chamfered portion 87, glass-carbon mixed wave-transmitting plate 90 DETAILED DESCRIPTION

[0042] In order to explain the technical content, structural features, achieved objectives and effects of the present invention in detail, the following is a detailed description in conjunction with the implementation methods and the accompanying drawings.

[0043] Please refer to Figure 1-Figure 4 The present application discloses a mold 100 for preparing an integrated glass-carbon hybrid wave-transmitting plate, comprising a frame 10, a lower mold 30 and an upper mold 50. The upper mold 50 is detachably arranged on the upper side of the frame 10, and the lower mold 30 is detachably arranged on the lower side of the frame 10, so that a mold cavity 20 is formed between the upper mold 50 and the lower mold 30; the upper mold 50 comprises an upper mold plate 51 and two upper mold seats 53 detachably arranged on both sides of the upper mold plate 51, the two upper mold seats 53 protrude from the upper mold plate 51 toward the lower mold 30, and an upper groove 55 is formed between the two upper mold seats 53; the lower mold 30 comprises a lower mold plate 31 and two lower mold seats 33 detachably arranged on both sides of the lower mold plate 31, the two lower mold seats 33 protrude from the lower mold plate 31 toward the upper mold 50, and a lower groove 35 is formed between the two lower mold seats 33. Since the upper mold seat 53 is detachably connected to the upper mold plate 51, and the lower mold plate 31 is detachably connected to the lower mold seat 33, the operation is very convenient when in use.

[0044] Please refer to Figure 5-Figure 6 The upper mold base 53 includes an upper connecting portion 531 and an upper mold frame 533. The upper connecting portion 531 is in a Z-shaped structure. One side of the upper connecting portion 531 is detachably connected to the upper mold base 53, and the other side of the upper connecting portion 531 is detachably connected to the upper mold plate 51; the lower mold base 33 includes a lower connecting portion 331 and a lower mold frame 333. The lower connecting portion 331 is in a Z-shaped structure. One side of the lower connecting portion 331 is detachably connected to the lower mold base 33, and the other side of the lower connecting portion 331 is detachably connected to the lower mold plate 31. That is to say, the two upper connecting parts 531 are detachably connected to both sides of the upper mold plate 51, and the two upper mold frames 533 are detachably connected to both sides of the upper mold plate 51 by means of the two upper connecting parts 531. The two upper mold frames 533 protrude from the upper mold plate 51 toward the lower mold 30 and form an upper groove 55 between the two upper connecting parts 531; the two lower connecting parts 331 are detachably connected to both sides of the lower mold plate 31, and the two lower mold frames 333 are detachably connected to both sides of the lower mold plate 31 by means of the two lower connecting parts 331. The two lower mold frames 333 protrude from the lower mold plate 31 toward the upper mold 50 and form a lower groove 35 between the two lower connecting parts 331.

[0045] Please continue to refer to Figure 5-Figure 6The upper connecting portion 531 includes an upper first portion 5311, an upper second portion 5313 and an upper third portion 5315. The upper first portion 5311 is bent and extended upward to form the upper second portion 5313. The upper second portion 5313 is bent and extended along the direction of the upper template 51 to form the upper third portion 5315. The upper third portion 5315 is provided with a first recess 5317. The upper template 51 is provided with a second recess 511 that matches the first recess 5317. The upper mold frame 533 is provided with an upper lug portion 5331 that matches the upper first portion 5311, and the upper end of the upper lug portion 5331 is flush with the upper end of the upper second portion 5313. The lower connecting portion 331 includes a lower first portion 3311, a lower second portion 3313 and a lower third portion 3315. The lower first portion 3311 is bent and extended downward to form the lower second portion 3313. The lower second portion 3313 is bent and extended along the direction of the lower template 31 to form the lower third portion 3315. The lower third portion 3315 is provided with a third recess 3317. The lower template 31 is provided with a fourth recess 311 matched with the third recess 3317. The lower mold frame 333 is provided with a lower convex ear portion 3331 matched with the lower first portion 3311, and the bottom end of the lower convex ear portion 3331 is flush with the bottom end of the lower second portion 3313. Preferably, the upper first portion 5311, the upper second portion 5313 and the upper third portion 5315 are integrally formed, and the lower first portion 3311, the lower second portion 3313 and the lower third portion 3315 are integrally formed.

[0046] The present application also provides a method for preparing an integrated glass-carbon hybrid wave-transmitting plate, which is performed using the mold 100, and the steps are as follows:

[0047] (1) The lower mold 30 is placed on the lower side of the frame 10, and the glass fiber prepreg 60 is laid layer by layer in the lower groove 35 until it is full, so as to obtain the first thickened portion 81 (such as Figure 7 shown);

[0048] (2) A layer of glass fiber prepreg 60 is continuously laid on the surface of the first thickened portion 81, and a layer of carbon fiber prepreg 70 is laid on both ends of the glass fiber prepreg 60, with a certain distance between the two carbon fiber prepregs 70 and a first overlapping portion with the glass fiber prepreg 60;

[0049] (3) a layer of glass fiber prepreg 60 is continuously laid on the surface of the two carbon fiber prepregs 70, and then a layer of carbon fiber prepreg 70 is laid on both ends of the glass fiber prepreg 60, with a certain distance between the two carbon fiber prepregs 70 and a second overlapping portion with the glass fiber prepreg 60;

[0050] A layer of glass fiber prepreg 60 is continuously laid on the surface of the two carbon fiber prepregs 70, and then a layer of carbon fiber prepreg 70 is laid on both ends of the glass fiber prepreg 60, with a certain distance between the two carbon fiber prepregs 70 and a first overlapping portion with the glass fiber prepreg 60;

[0051] (4) Repeat step (3) until it is flush with the upper side of the frame 10, and three-dimensionally sew the overlapping parts of the glass fiber prepreg cloth 60 and the carbon fiber prepreg cloth 70 through the carbon fiber prepreg yarn 80 to obtain a glass-carbon mixed part 83;

[0052] (5) Continue to lay glass fiber prepreg 60 layer by layer on the surface of the middle part of the glass-carbon mixed part 83 to a predetermined thickness to obtain a second thickened part 85;

[0053] (6) The upper mold plate 51 and the two upper mold bases 53 are installed on the upper side of the frame 10, and the second thickened portion 85 is located in the upper groove 55;

[0054] (7) The mold is placed in a vacuum environment for vacuuming and then heated for curing to obtain an integrated glass-carbon hybrid wave-transmitting plate 90.

[0055] In a preferred embodiment, the first thickened portion 81, the second thickened portion 85 and the glass-carbon mixed portion 83 are both paved with carbon fiber prepreg 70 to form a chamfered portion 87 (such as Figure 7 to avoid stress concentration.

[0056] In a preferred embodiment, the overlapping lengths of the first overlapping portion and the second overlapping portion are different, but it is not excluded that the overlapping lengths of the first overlapping portion and the second overlapping portion are the same. The carbon fiber prepreg 70 and the glass fiber prepreg 60 are interlaced and laid, and the carbon fiber prepreg 80 is used in the interlaced area for three-dimensional stitching (such as Figure 7 As shown), the critical strength of glassy carbon is improved.

[0057] The following is combined with Figure 1-7 , the preparation method of the integrated glass-carbon hybrid wave-transmitting plate of the present application is described in detail, the steps are as follows:

[0058] (1) placing the lower template 31, the lower connecting portion 331 and the lower mold frame 333 on the lower side of the frame 10, forming a lower groove 35 between the two lower connecting portions 331, and laying the glass fiber prepreg 60 layer by layer in the lower groove 35 until it is full, thereby obtaining a first thickened portion 81;

[0059] (2) When the first thickened portion 81 is prepared, the glass-carbon mixed portion 83 is laid, and a layer of glass fiber prepreg 60 is continuously laid on the surface of the first thickened portion 81. The length of the glass fiber prepreg 60 is less than the length of the mold cavity 20 in the horizontal direction. Therefore, a layer of carbon fiber prepreg 70 is laid on the left side of the glass fiber prepreg 60 and has an overlapping portion with the glass fiber prepreg 60. A layer of carbon fiber prepreg 70 is laid on the right side of the glass fiber prepreg 60 and has an overlapping portion with the glass fiber prepreg 60. There is a certain gap between the two carbon fiber prepregs 70.

[0060] (3) A layer of glass fiber prepreg 60 is continuously laid on the surface of the left and right carbon fiber prepregs 70. Similarly, a layer of carbon fiber prepreg 70 is laid on the left side of the glass fiber prepreg 60 and has an overlapping portion with the glass fiber prepreg 60. A layer of carbon fiber prepreg 70 is laid on the right side of the glass fiber prepreg 60 and has an overlapping portion with the glass fiber prepreg 60. There is a certain gap between the two carbon fiber prepregs 70.

[0061] (4) Repeat step (3) until the thickness of the interlaced carbon fiber prepreg 70 and the glass fiber prepreg 60 is flush with the upper side of the frame 10, and three-dimensionally sew the overlapping parts of the glass fiber prepreg 60 and the carbon fiber prepreg 70 through the carbon fiber prepreg yarn 80 to obtain a glass-carbon mixed part 83;

[0062] (5) The glass fiber prepreg 60 is continuously laid layer by layer on the surface of the middle portion of the glass-carbon mixed portion 83 to a predetermined thickness to obtain a second thickened portion 85. The carbon fiber prepreg 70 is laid at the junction of the first thickened portion 81 and the second thickened portion 85 with the glass-carbon mixed portion 83 to form a chamfered portion 87.

[0063] (6) The upper mold plate 51, the upper connecting portion 531 and the upper mold frame 533 are installed on the upper side of the frame 10, and the second thickened portion 85 is located in the upper groove 55;

[0064] (7) The mold is placed in a vacuum environment for vacuum treatment and heated for curing. The specific steps of heating and curing are divided into the following three steps:

[0065] (a) room temperature to 80 degrees Celsius for 0.5 hours and a pressure of 0.3 MPa, (b) 80 degrees Celsius to 125 degrees Celsius for 2 hours and a pressure of 0.7 MPa, (c) 125 degrees Celsius for 1.5 hours and a pressure of 0.7 MPa;

[0066] (8) After the solidified glass-carbon hybrid wave-transmitting plate is depressurized and left to cool naturally, the molds are removed in sequence to obtain the glass-carbon hybrid wave-transmitting plate 90.

[0067] The above disclosure is only the preferred embodiment of the present invention, which certainly cannot be used to limit the scope of rights of the present invention. Therefore, equivalent changes made according to the scope of the patent application of the present invention are still within the scope covered by the present invention.

Claims

1. A method for preparing an integrated glass-carbon hybrid wave-transmitting plate, characterized in that: Using mold, The mold comprises a frame, a lower mold and an upper mold, wherein the upper mold is detachably disposed on the upper side of the frame, and the lower mold is detachably disposed on the lower side of the frame, so that a mold cavity is formed between the upper mold and the lower mold; The upper mold comprises an upper mold plate and two upper mold seats detachably arranged on both sides of the upper mold plate, the two upper mold seats protrude from the upper mold plate toward the lower mold and form an upper groove between the two upper mold seats; The lower mold comprises a lower mold plate and two lower mold seats detachably arranged on both sides of the lower mold plate, the two lower mold seats protrude from the lower mold plate toward the upper mold and form a lower groove between the two lower mold seats; Here are the steps: (1) placing the lower mold on the lower side of the frame, and laying glass fiber prepreg cloth layer by layer in the lower groove until it is full, thereby obtaining a first thickened portion; (2) continuing to lay a layer of glass fiber prepreg on the surface of the first thickened portion, and laying a layer of carbon fiber prepreg at both ends of the glass fiber prepreg, with a certain distance between the two carbon fiber prepregs and a first overlapping portion with the glass fiber prepreg; (3) laying a layer of glass fiber prepreg on the surface of the two carbon fiber prepregs, and then laying a layer of carbon fiber prepreg on both ends of the glass fiber prepreg, with a certain distance between the two carbon fiber prepregs and a second overlapping portion with the glass fiber prepreg; A layer of glass fiber prepreg is continuously laid on the surface of the two carbon fiber prepregs, and then a layer of carbon fiber prepreg is laid on both ends of the glass fiber prepreg, with a certain distance between the two carbon fiber prepregs and a first overlapping portion with the glass fiber prepreg; (4) Repeat step (3) until it is flush with the upper side of the frame, and three-dimensionally sew the overlapping parts of the glass fiber prepreg cloth and the carbon fiber prepreg cloth through the carbon fiber prepreg yarn to obtain a glass-carbon mixed part; (5) continuing to lay glass fiber prepreg layer by layer on the surface of the middle part of the glass-carbon mixed part to a predetermined thickness, thereby obtaining a second thickened part; (6) installing the upper mold plate and the two upper mold seats on the upper side of the frame, with the second thickened portion located in the upper groove; (7) Placing the mold in a vacuum environment for vacuuming and performing a heating and curing treatment to obtain a product.

2. The preparation method according to claim 1, characterized in that The upper die seat comprises an upper connecting portion and an upper die frame, wherein the upper connecting portion is in a Z-shaped structure, one side of the upper connecting portion is detachably connected to the upper die frame, and the other side of the upper connecting portion is detachably connected to the upper die plate; The lower die base comprises a lower connecting portion and a lower die frame, wherein the lower connecting portion is in a Z-shaped structure, one side of the lower connecting portion is detachably connected to the lower die frame, and the other side of the lower connecting portion is detachably connected to the lower die plate.

3. The preparation method according to claim 2, characterized in that: The upper connecting portion includes an upper first portion, an upper second portion and an upper third portion, the upper first portion is bent and extended upward to form the upper second portion, the upper second portion is bent and extended along the direction of the upper template to form the upper third portion, the upper third portion is provided with a first recess, the upper template is provided with a second recess matched with the first recess, the upper mold frame is provided with an upper lug portion matched with the upper first portion, and the upper end of the upper lug portion is flush with the upper end of the upper second portion; The lower connecting portion includes a lower first portion, a lower second portion and a lower third portion, the lower first portion is bent and extended downward to form the lower second portion, the lower second portion is bent and extended along the direction of the lower template to form the lower third portion, the lower third portion is provided with a third recess, the lower template is provided with a fourth recess matched with the third recess, the lower mold frame is provided with a lower lug portion matched with the lower first portion, and the bottom end of the lower lug portion is flush with the bottom end of the lower second portion.

4. The preparation method according to claim 1, characterized in that: Carbon fiber prepreg is applied at the junctions of the first thickened portion, the second thickened portion and the glass-carbon mixed portion to form chamfered portions.

5. The preparation method according to claim 1, characterized in that: The overlapping lengths of the first overlapping portion and the second overlapping portion are different.

6. An integrated glass-carbon hybrid wave-transmitting plate, characterized in that: The method is as described in any one of claims 1 to 5.

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