Multilayer aluminum alloy composite plate

Abstract

The present invention relates to the technical field of profiles, and in particular provides a multi-layer aluminum alloy composite plate material, comprising a multi-layer aluminum alloy composite plate material, comprising a profile made of aluminum alloy, a thermal effect plate arranged in the profile, a fire extinguishing medium filled in the profile and a foaming agent filled in the profile; the top of the profile is once formed with a first cavity, a second cavity and a third cavity, the first cavity is formed on the left side of the top surface of the profile, the third cavity is formed on the right side of the top surface of the profile, and the second cavity is filled with a clamp. When the heat exceeds the melting point or plastic point of the plastic plate on the left, the plastic plate will also deform and open the second pore on the left, and the foaming agent will also flow into the second cavity from the second pore, and then spray upward from the guide hole on the left to the other side of the glass, and the fire extinguishing medium is sprayed on the opposite side of the glass, so that both sides of the glass can achieve flame retardancy or fire extinguishing.

Description

Technical Field

[0001] The invention relates to the technical field of profiles, and in particular to a multi-layer aluminum alloy composite plate. Background Art

[0002] Aluminum alloy profiles are used in various occasions, such as a multi-layer aluminum alloy composite plate disclosed in Chinese patent application number 201811327922.8, which includes two aluminum alloy frames and a carbon steel plate. The aluminum alloy frame includes a connecting plate, and an aluminum alloy plug plate and an aluminum alloy outer plate are fixedly connected to one side of the connecting plate. A cavity is formed between the aluminum alloy plug plate and the aluminum alloy outer plate, and the strength of the aluminum alloy plate is improved by arranging a carbon steel plate in the cavity.

[0003] Aluminum alloy profiles, which are widely used in doors and windows, are not only the supporting frames of doors and windows, but also need to consider their safety in actual design. Once doors and windows catch fire, the existing profiles lack fire extinguishing or flame retardant functions, so the continued spread of fire will cause the profiles or glass to deform or burn. The existing aluminum alloy profiles are mostly designed with shape and strength in mind, but safety needs to be further improved. Summary of the invention

[0004] In order to solve the above problems, the aluminum alloy profile can resist deformation and has flame retardancy when used in the field of building materials. The present invention provides a multi-layer aluminum alloy composite plate, including an aluminum alloy profile, a thermal effect plate arranged in the profile, a fire extinguishing medium filled in the profile, and a foaming agent filled in the profile;

[0005] The top of the profile is formed with a first cavity, a second cavity and a third cavity at one time, the first cavity is formed on the left side of the top surface of the profile, the third cavity is formed on the right side of the top surface of the profile, and the second cavity is formed on the top surface of the profile and is located between the first cavity and the third cavity;

[0006] The second cavity is filled with a clamping piece;

[0007] The bottom of the profile is formed with two left and right positioning rails at one time, the left positioning rail is located at the bottom of the first cavity, and the right positioning rail is located at the bottom of the third cavity, and the bottom of the profile is formed with an air passage located between the left and right positioning rails; the profile is formed with a first assembly cavity located at the bottom of the first cavity at one time, the first assembly cavity is connected with the first cavity up and down, and the thermal effect plate includes a first plate inserted in the first assembly cavity;

[0008] A second assembly cavity is formed in the profile at one time, the second assembly cavity is located at the bottom of the second cavity and the third cavity, and the thermal effect plate includes a second plate inserted in the second assembly cavity;

[0009] The bottom surface of the second plate is located above the airway;

[0010] A branch air channel is provided at the top of the air channel, and a first forming portion is provided on the top surface of the second plate, which is vertically upward and assembled in the branch air channel;

[0011] A row of first air holes is provided between the molding surfaces of the second cavity and the third cavity, a plastic plate covering the first air holes is fixed on the right surface of the inner cavity of the second cavity, the fire extinguishing medium is filled in the third cavity, the foaming agent is compressed in the first cavity, a booster pipe is installed at each end of the first cavity, the other ends of the two booster pipes are connected to the two ends of the third cavity, and a guide hole communicating with the second cavity is provided on the clamp.

[0012] As further preferred, the foaming agent is a polyurethane foaming agent.

[0013] As a further preferred embodiment, third assembly cavities are opened on both sides of the air duct, the other side of the two third assembly cavities is the two positioning rails, and the two sides of the bottom of the second plate are respectively stuck in the two third assembly cavities.

[0014] As further preferred, the second plate is parallel to the bottom of the first plate.

[0015] As a further preferred embodiment, the left and right sides of the first plate are respectively provided with second molding parts attached to the left and right inner walls of the first cavity.

[0016] As further preferred, a third molding portion bent at the bottom of the third cavity is provided at the top end of the second plate, and the first molding portion is located between the third molding portion and the first plate.

[0017] As a further preferred embodiment, the clamping member includes a first clamping plate and a second clamping plate, the outer side surface of the first clamping plate is fixed on the left side of the inner cavity of the second cavity, and the outer side surface of the second clamping plate is fixed on the right side of the inner cavity of the second cavity, wherein a row of guide holes is provided on the second clamping plate, and a chamfer is provided on one end of the second clamping plate facing the right side of the second cavity, the bottom end of the guide hole reaches the chamfer, and the other end of the guide hole is inclined upward and passes through the top surface of the second clamping plate, and the bottom end of the plastic plate enters the right side of the chamfer, and an air collecting cavity is formed between the bottom end of the plastic plate and the chamfer.

[0018] As a further preferred embodiment, a row of second air holes that simultaneously penetrate the second molding part is also provided between the first cavity and the second cavity, a second chamfer is provided on the first clamping plate, the structure of the first clamping plate is consistent with that of the second clamping plate, a chamfer is also provided on the first clamping plate, a plastic plate covering the second air holes is also provided on the left wall of the inner cavity of the second cavity, and an air collecting cavity is also formed between the bottom end of the plastic plate and the chamfer of the bottom end of the first clamping plate.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] 1. High heat is fed back to the airway from the bottom of the profile, and the heat is released through the space of the airway to extend the time when the profile may be deformed. In addition, the heat will also be released to the first cavity, the second cavity and the third cavity, further extending the time when the profile may be deformed. The heat will also be released to the thermal effect plate. While accelerating the heat release through the thermal effect plate, the heat will also be transferred from the first plate to the first assembly cavity, and then quickly transferred from the first assembly cavity to the first cavity. Since the foaming agent is compressed in the first cavity, as the heat continues to rise, when the temperature exceeds the expansion coefficient of the foaming agent, the foaming agent will foam and grow in the first cavity. As the foaming agent gradually foams and grows in the first cavity, it will enter the third cavity from the booster pipes at both ends. At the same time, the high heat generated will also be transferred to the second plate, and quickly released from the second plate to the airway. Some of the heat is quickly released to the third cavity. At this time, the air pressure and temperature in the third cavity continue to increase. When the temperature in the third cavity reaches the melting point of the plastic plate , the plastic plate will be plastically deformed, for example, wrinkles will occur from the bottom to the top, causing the first air hole between the second cavity and the third cavity to open, and the fire extinguishing medium will be sprayed into the second cavity from the first air hole, and as the foaming agent is continuously released into the third cavity through the booster pipe, the air pressure in the third cavity will continue to rise, and the pressure of the fire extinguishing medium in the third cavity entering the second cavity will gradually increase, and the fire extinguishing medium will flow into the second cavity in a high-pressure spraying manner. Since the four sides of the glass are clamped in the second cavity by the clamping piece, and the clamping piece is provided with a guide hole communicating with the second cavity, and it can be seen from the figure that the opening direction of the guide hole is toward the surface of the glass, the fire extinguishing medium flows into the second cavity in a high-pressure manner, and finally sprays upward through the guide hole. Since the edge of the glass is clamped in the second cavity, the largest surface of the glass is located within the spraying range of the guide hole. After the fire extinguishing medium is sprayed outward through the guide hole, it will act on the surface of the glass. If the glass is burning at this time, it is used for fire extinguishing. If the glass is at a high temperature at this time, it is used for flame retardancy.

[0021] 2. The foaming agent is a polyurethane foaming agent. When the temperature in the first cavity exceeds the expansion coefficient of the foaming agent, it causes foaming and expansion in the first cavity, and enters the third cavity along the boosting pipes at both ends. In addition to boosting the fire extinguishing medium in the third cavity, it also has the following effects: It is well known that the foaming agent will expand rapidly when heated. In addition to a part of the foaming agent pouring into the third cavity to boost the fire extinguishing medium, another part of the foaming agent will be gradually released in the first cavity, causing air pressure to form in the first cavity. At the same time, heat is gradually released into the first cavity through the second plate. When the heat exceeds the melting point or plastic point of the plastic plate on the left, the plastic plate will also deform and open the second pore on the left. The foaming agent will also pour into the second cavity from the second pore, and then spray upward from the guide hole on the left to the other side of the glass, and the fire extinguishing medium will be sprayed to the opposite side of the glass, so that both sides of the glass can achieve flame retardancy or fire extinguishing. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic diagram of the structure of a multi-layer aluminum alloy composite plate provided by an embodiment of the present invention, in which the booster pipes at both ends have been removed;

[0023] Figure 2 A schematic top view of a multi-layer aluminum alloy composite plate provided in an embodiment of the present invention, in which booster pipes at both ends are installed;

[0024] Figure 3 A schematic diagram of a thermal effect plate in a multi-layer aluminum alloy composite plate provided in an embodiment of the present invention being removed from a profile;

[0025] Figure 4 A schematic diagram of a multi-layer aluminum alloy composite plate provided by an embodiment of the present invention when it is disconnected at a guide hole;

[0026] Figure 5 A schematic diagram of only clamping parts in a multi-layer aluminum alloy composite plate provided in an embodiment of the present invention.

[0027] In the figure: 1, profile; 2, thermal effect plate; 3, fire extinguishing medium; 4, foaming agent; 5, first cavity; 6, second cavity; 7, second air hole; 8, plastic plate; 9, third cavity; 10, first air hole; 11, positioning track; 12, first assembly cavity; 13, second assembly cavity; 14, airway; 15, third assembly cavity; 16, airway; 17, first plate; 18, second molding part; 19, second plate; 20, first molding part; 21, third molding part; 22, power-assisting pipe; 23, clamp; 24, first clamp; 25, second clamp; 26, guide hole; 27, chamfer; 28, air collecting cavity; 29, second chamfer. DETAILED DESCRIPTION

[0028] The above and other embodiments and advantages of the present invention are described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments.

[0029] In one embodiment, Figure 1-Figure 5 As shown:

[0030] This embodiment provides a multi-layer aluminum alloy composite plate, including an aluminum alloy profile 1, a thermal effect plate 2 arranged in the profile 1, a fire extinguishing medium 3 filled in the profile 1, and a foaming agent 4 (which may also be an expansion agent, and the foaming agent 4 is used for convenience of description) filled in the profile 1;

[0031] The top of the profile 1 is formed with a first cavity 5, a second cavity 6 and a third cavity 9 at one time. The first cavity 5 is formed on the left side of the top surface of the profile 1, the third cavity 9 is formed on the right side of the top surface of the profile 1, and the second cavity 6 is formed on the top surface of the profile 1 and is located between the first cavity 5 and the third cavity 9;

[0032] The second cavity 6 is filled with a clamping member 23; when the clamping member 23 is used in actual application, it is used to clamp glass;

[0033] A row of first air holes 10 is provided between the molding surfaces of the second cavity 6 and the third cavity 9. A plastic plate 8 covering the first air holes 10 is fixed on the right surface of the inner cavity of the second cavity 6. The fire extinguishing medium 3 is filled in the third cavity 9. The foaming agent 4 is compressed in the first cavity 5. A boosting pipe 22 is installed at each end of the first cavity 5. The other ends of the two boosting pipes 22 are connected to the two ends of the third cavity 9.

[0034] The bottom of the profile 1 is formed with two left and right positioning rails 11 at one time. When the two positioning rails 11 are used for implementation, the entire profile 1 with glass is clamped on the door and window structure of the building. The doors and windows are often rectangular frames. Four profiles 1 of this structure are installed in the four frames of the doors and windows through the positioning rails 11. In addition, the molding positions of the positioning rails 11 are defined as follows: the left positioning rail 11 is located at the bottom of the first cavity 5, and the right positioning rail 11 is located at the bottom of the third cavity 9. Secondly, an airway 14 is formed at the bottom of the profile 1 between the left and right positioning rails 11; a first assembly cavity 12 is formed at the bottom of the first cavity 5 in the profile 1 at one time, and the first assembly cavity 12 is located at the upper and lower sides of the first cavity 5. The thermal effect plate 2 includes a first plate 17 inserted into the first assembly cavity 12; an air channel 14 is formed between the surface of the profile 1 after installation and the doors and windows, and the air channel 14 is breathable. When the profile 1 is overheated due to high temperature weather or fire, the high heat is fed back to the air channel 14 from the bottom of the profile 1, and the heat is released through the space of the air channel 14 to extend the time when the profile 1 may be deformed. In addition, the heat will also be released into the first cavity 5, the second cavity 6 and the third cavity 9, further extending the time when the profile 1 may be deformed, and the heat will also be released to the thermal effect plate 2. The thermal effect plate 2 is a copper plate, or a composite plate containing a copper material, such as an alloy steel doped with copper in a carbon steel plate. The copper material has a high thermal conductivity. While the thermal effect plate 2 accelerates the heat release, the heat is also transferred from the first plate 17 to the first assembly cavity 12, and then quickly transferred from the first assembly cavity 12 to the first cavity 5. Since the foaming agent 4 is compressed in the first cavity 5, as the heat continues to rise, when the temperature exceeds the expansion coefficient of the foaming agent 4, the foaming agent 4 will foam and grow in the first cavity 5. As the foaming agent 4 gradually foams and grows in the first cavity 5, it will enter the third cavity 9 through the booster pipes 22 at both ends. At the same time, the high heat generated will also be transferred to the second plate 19, and then quickly released from the second plate 19 to the airway 14. A part of the heat is quickly released to the third cavity 9. At this time, the air pressure and temperature in the third cavity 9 continue to increase. When the third cavity 9 When the temperature reaches the melting point of the plastic plate 8, the plastic plate 8 will be plastically deformed, for example, wrinkles will occur from the bottom to the top, causing the first air hole 10 between the second cavity 6 and the third cavity 9 to open. At this time, the fire extinguishing medium 3 in the third cavity 9 will be sprayed into the second cavity 6 through the first air hole 10, and as the foaming agent 4 is continuously released into the third cavity 9 through the booster pipe 22, the air pressure in the third cavity 9 will continue to rise, and the pressure of the fire extinguishing medium 3 in the third cavity 9 entering the second cavity 6 will gradually increase, so that the fire extinguishing medium 3 flows into the second cavity 6 in the form of high-pressure spraying. Since the four sides of the glass are clamped in the second cavity 6 by the clamps 23, and the clamps 23 are provided with guide holes 26 communicating with the second cavity 6, and from Figure 1It can be seen that the opening direction of the guide hole 26 is toward the surface of the glass. Therefore, after the fire extinguishing medium 3 flows into the second cavity 6 in a high-pressure manner, it is finally sprayed upward through the guide hole 26. Since the edge of the glass is clamped in the second cavity 6, the largest surface of the glass is located within the spraying range of the guide hole 26. After the fire extinguishing medium 3 is sprayed outward through the guide hole 26, it will act on the surface of the glass. If the glass is burning at this time, it is used for fire extinguishing. If the glass is at a high temperature at this time, it is used for flame retardancy.

[0035] like Figure 1 , Figure 4 As shown, in another embodiment, a row of second air holes 7 that simultaneously penetrate the second molding portion 18 is also provided between the first cavity 5 and the second cavity 6, a second chamfer 29 is provided on the first clamping plate 24, the structure of the first clamping plate 24 is consistent with the structure of the second clamping plate 25, a chamfer 27 is also provided on the first clamping plate 24, a plastic plate 8 covering the second air hole 7 is also provided on the left wall of the inner cavity of the second cavity 6, and an air collecting cavity 28 is also formed between the bottom end of the plastic plate 8 and the chamfer 27 at the bottom end of the first clamping plate 24.

[0036] As mentioned above, the foaming agent 4 is a polyurethane foaming agent, and the polyurethane component in the polyurethane foaming agent is flame retardant (the polyurethane foaming agent itself is a prior art, and its flame retardant performance test does not need to be described separately). When the temperature in the first cavity 5 where it is located exceeds the expansion coefficient of the foaming agent, it causes it to foam and expand in the first cavity 5, and enter the third cavity 9 along the boosting pipes 22 at both ends, and it not only boosts the fire extinguishing medium 3 in the third cavity 9, but also has the following effects: It is well known that the foaming agent will expand rapidly when heated, and a part of the foaming agent 4 flows into the third cavity 9 to boost the fire extinguishing medium 3 in the third cavity 9. In addition to the action of the medium 3, a part of the foaming agent 4 will be gradually released in the first cavity 5, and cause air pressure to form in the first cavity 5. At the same time, heat is gradually released into the first cavity 5 through the second plate 19. When the heat exceeds the melting point or plastic point of the plastic plate 8 on the left side of the figure, the plastic plate 8 will also deform and open the second air hole 7 on the left side. The foaming agent 4 will also flow into the second cavity 6 from the second air hole 7, and then be sprayed upward from the guide hole 26 on the left side to the other side of the glass. The fire extinguishing medium 3 is sprayed onto the opposite side of the glass, so that both sides of the glass can achieve flame retardancy or fire extinguishing.

[0037] A second assembly cavity 13 is formed in the profile 1 at one time, and the second assembly cavity 13 is located at the bottom of the second cavity 6 and the third cavity 9, and the second plate 19 is inserted in the second assembly cavity 13; the bottom surface of the second plate 19 is located above the air channel 14; when the profile 1 catches fire or the glass catches fire, the heat is released through the second plate 19, part of the heat is released into the air channel 14, and the other part is released into the second assembly cavity 13, and is transferred from the second assembly cavity 13 to the second cavity 6 and the third cavity 9, so as to accelerate the speed of plastic deformation of the plastic plate 8 on the same side, shorten the opening time of the second air hole 7 on the same side, and at the same time accelerate the fire extinguishing medium 3 from the third cavity 9 into the second cavity 6, and then discharged to the glass surface through the guide hole 26 to achieve flame retardant efficiency.

[0038] like Figure 3 , Figure 4 As shown, a branch air channel 16 is provided at the top of the air channel 14, and a first molding part 20 is provided on the top surface of the second plate 19, which is vertically upward and assembled in the branch air channel 16. The number of the first molding part 20 and the branch air channel 16 is not necessarily single, but may be multiple. It is used to increase the area of ​​heat released from the second plate 19 to the third cavity 9. Similarly, in order to speed up the release of heat to the first cavity 5, the left and right sides of the first plate 17 are respectively provided with a second molding part 18 attached to the left and right inner walls of the first cavity 5. Similarly, in order to further speed up the release efficiency of heat to each cavity, a third molding part 21 bent at the bottom of the third cavity 9 is provided at the top of the second plate 19, and the first molding part 20 is located between the third molding part 21 and the first plate 17.

[0039] The air passage 14 has third assembly cavities 15 on both sides. The other side of the two third assembly cavities 15 is two positioning rails 11. The bottom sides of the second plate 19 are respectively fixed in the two third assembly cavities 15, so that the multilayer profile 1 is easy to assemble.

[0040] like Figure 4 As shown, the second plate 19 is parallel to the bottom of the first plate 17. A clamping area is formed between the second plate 19 and the first plate 17, and the bottom edge of the first cavity 5 is just located in this clamping area. When the second plate 19 and the first plate 17 release heat, heat concentration can be formed in this clamping area, and the heat is released faster to the foaming agent 4 by this clamping area, thereby accelerating the foaming and expansion speed of the foaming agent 4.

[0041] The distribution structure of the clamping member 23 and the plastic plate 8 is described as follows:

[0042] First, the clamping member 23 includes a first clamping plate 24 and a second clamping plate 25 , forming a clamping area therebetween, and one side of the glass is clamped between the first clamping plates 24 and the second clamping plates 25 .

[0043] Secondly, the outer side surface of the first clamping plate 24 is fixed on the left side of the inner cavity of the second cavity 6, and the outer side surface of the second clamping plate 25 is fixed on the right side of the inner cavity of the second cavity 6, wherein a row of guide holes 26 are opened on the second clamping plate 25, and a chamfer 27 is opened at one end of the second clamping plate 25 facing the right side of the second cavity 6, the bottom end of the guide hole 26 reaches the chamfer 27, and the other end of the guide hole 26 is inclined upward and passes through the top surface of the second clamping plate 25, and the bottom end of the plastic plate 8 enters the right side of the chamfer 27, and a gas collecting cavity 28 is formed between the bottom end of the plastic plate 8 and the chamfer 27. The guide holes 26 on the second clamping plate 25 and the plastic plate 8 on the same side serve the first cavity 5 on the left side of the figure. When the foaming agent 4 in the first cavity 5 expands due to heat and the plastic plate 8 on the same side is plastically deformed, the first air hole 10 on the same side will open, and part of the foaming agent 4 in the first cavity 5 will enter the gas collecting cavity 28 on the same side through the second air hole 7, and then be sprayed upward to the left surface of the glass through the guide holes 26 on the second clamping plate 25 on the same side. The opening of the gas collecting cavity 28 not only provides a space for plastic deformation of the bottom of the plastic plate 8, for example, when the high-temperature pressure gas in the first cavity 5 blows toward the plastic plate 8 to cause the plastic deformation of the plastic plate 8, the plastic plate 8 will be plastically deformed with the bottom facing the gas collecting cavity 28, thereby accelerating the opening efficiency of the second air hole 7. Similarly, the gas collecting cavity 28 on the right side, which serves the plastic plate 8 on the right side, can be plastically deformed quickly, thereby accelerating the opening efficiency of the first air hole 10 on the same side.

[0044] The above orientation designations do not represent the specific orientations of the components in this implementation scheme. This implementation scheme is only for the convenience of describing the scheme, and the orientations are described relatively with reference to the figures. In essence, the specific orientations of the components are described according to their actual installation and actual use as well as the customary orientations of technicians in this field. This is hereby explained.

[0045] The specific implementation methods described above further describe the invention purpose, technical solutions, and beneficial effects of the present invention in detail. It should be understood that the above description is only a specific implementation method of the present invention and is not intended to limit the protection scope of the present invention. It is particularly pointed out that for those skilled in the art, any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A multi-layer aluminum alloy composite sheet, characterized in that: It comprises a profile (1) made of an aluminum alloy, a thermal effect plate (2) arranged in the profile (1), a fire extinguishing medium (3) filled in the profile (1), and a foaming agent (4) filled in the profile (1); The top of the profile (1) is molded with a first cavity (5), a second cavity (6) and a third cavity (9) at one time, the first cavity (5) is molded on the left side of the top surface of the profile (1), the third cavity (9) is molded on the right side of the top surface of the profile (1), and the second cavity (6) is molded on the top surface of the profile (1) and is located between the first cavity (5) and the third cavity (9); The second cavity (6) is filled with a clamping member (23); The bottom of the profile (1) is formed with two left and right positioning rails (11), the left positioning rail (11) is located at the bottom of the first cavity (5), and the right positioning rail (11) is located at the bottom of the third cavity (9), and the bottom of the profile (1) is formed with an air passage (14) located between the left and right positioning rails (11); the profile (1) is formed with a first assembly cavity (12) located at the bottom of the first cavity (5), the first assembly cavity (12) is connected to the first cavity (5) from top to bottom, and the thermal effect plate (2) includes a first plate (17) inserted into the first assembly cavity (12); A second assembly cavity (13) is formed in the profile (1) at one time, the second assembly cavity (13) is located at the bottom of the second cavity (6) and the third cavity (9), and the thermal effect plate (2) includes a second plate (19) inserted in the second assembly cavity (13); The bottom surface of the second plate (19) is located above the air channel (14); The top of the air channel (14) is provided with a branch air channel (16), and the top surface of the second plate (19) is provided with a first forming portion (20) which is vertically upward and assembled in the branch air channel (16); A row of first air holes (10) is provided between the molding surfaces of the second cavity (6) and the third cavity (9); a plastic plate (8) covering the first air holes (10) is fixed on the right surface of the inner cavity of the second cavity (6); the fire extinguishing medium (3) is filled in the third cavity (9); the foaming agent (4) is compressed in the first cavity (5); a booster pipe (22) is installed at each end of the first cavity (5); the other ends of the two booster pipes (22) are connected to the two ends of the third cavity (9); the clamp (23) is provided with a guide hole (26) communicating with the second cavity (6); The clamping member (23) comprises a first clamping plate (24) and a second clamping plate (25), wherein the outer side surface of the first clamping plate (24) is fixed on the left side of the inner cavity of the second cavity (6), and the outer side surface of the second clamping plate (25) is fixed on the right side of the inner cavity of the second cavity (6), wherein a row of guide holes (26) are provided on the second clamping plate (25), and a chamfer (27) is provided on one end of the second clamping plate (25) facing the right side of the second cavity (6), the bottom end of the guide hole (26) reaches the chamfer (27), and the other end of the guide hole (26) is inclined upward and passes through the top surface of the second clamping plate (25), and the bottom end of the plastic plate (8) enters the right side of the chamfer (27), and a gas collecting cavity (28) is formed between the bottom end of the plastic plate (8) and the chamfer (27).

2. The multi-layer aluminum alloy composite sheet according to claim 1, characterized in that: The foaming agent (4) is a polyurethane foaming agent.

3. The multi-layer aluminum alloy composite sheet according to claim 2, characterized in that: The air passage (14) is provided with third assembly cavities (15) on both sides, the other side of the two third assembly cavities (15) is the two positioning rails (11), and the bottom sides of the second plate (19) are respectively clamped in the two third assembly cavities (15).

4. The multi-layer aluminum alloy composite sheet according to claim 3, characterized in that: The second plate (19) is parallel to the bottom of the first plate (17).

5. The multi-layer aluminum alloy composite sheet according to claim 4, characterized in that: The first plate (17) is provided with second molding parts (18) on the left and right sides respectively, which are attached to the left and right inner walls of the first cavity (5).

6. The multi-layer aluminum alloy composite sheet according to claim 5, characterized in that: A third molding portion (21) bent at the bottom of the third cavity (9) is provided at the top end of the second plate (19), and the first molding portion (20) is located between the third molding portion (21) and the first plate (17).

7. The multi-layer aluminum alloy composite sheet according to claim 6, characterized in that: A row of second air holes (7) that simultaneously penetrate the second molding portion (18) is also provided between the first cavity (5) and the second cavity (6); the structure of the first clamping plate (24) is consistent with that of the second clamping plate (25); a plastic plate (8) covering the second air holes (7) is also provided on the left wall of the inner cavity of the second cavity (6); and an air collecting cavity (28) is also formed between the bottom end of the plastic plate (8) and the chamfer of the bottom end of the first clamping plate (24).

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