Automatic production line for A2 non-combustible metal composite plate

Abstract

The invention discloses an automatic production line for A2 non-combustible metal composite plates. The automatic production line comprises an extruder, an extrusion die, an upper-layer unwinding unit, a lower-layer unwinding unit, a composite forming unit, a front traction machine, a cooling device and a post-processing device, the extruder comprises an extrusion rack, an extrusion barrel and an extrusion screw, the extrusion screw comprises a feeding section, a conveying section, a pre-plasticizing section, a plasticizing section, a compression section, an exhaust section and a metering section, the lead angles of screw flights of the feeding section, the conveying section, the pre-plasticizing section and the plasticizing section are gradually reduced, and the lead angle of the screw flights of the compression section is smaller than the lead angles of the screw flights of the plasticizing section and the exhaust section. The lead angle of the screw flight of the exhaust section is greater than that of the screw flight of the metering section; the lead of the screw flights of the feeding section, the conveying section, the pre-plasticizing section and the plasticizing section is gradually reduced, the lead of the screw flights of the compression section is smaller than the lead of the screw flights of the plasticizing section and the exhaust section, and the lead of the screw flights of the metering section is larger than the lead of the screw flights of the exhaust section. The automatic production line can be used for producing A2 non-combustible metal composite plates.

Description

Technical Field

[0001] This invention relates to the field of metal composite panel production technology, and more particularly to an automated production line for A2 non-combustible metal composite panels. Background Technology

[0002] Class A fire-resistant insulation materials are the highest fire-resistant building insulation materials, classified into two categories based on their combustion performance: Class A1 (single-cell inorganic non-combustible) and Class A2 (composite organic non-combustible). Metal composite panels generally consist of an upper metal layer, a lower metal layer, and a core layer in between. The core layer is typically made of PE plastic. To improve the fire resistance of the metal composite panel, the core layer is made of a Class A2 fire-resistant material, thus giving the metal composite panel an A2 fire resistance rating. The core material for a Class A2 fire-resistant panel generally includes plastic particles with added inorganic materials. For example, invention application 202510287937.X discloses a fire-resistant plastic material for extrusion, which mainly includes... The compound contains 3-10% polyethylene plastic particles, 30-50% magnesium hydroxide, 40-50% aluminum hydroxide, and 2-8% mixed additives. Because this composite organic material contains a large amount of inorganic materials, its flowability is worse than that of conventional plastic core sheets, making extrusion more difficult. Furthermore, due to the low content of plastic particles, thorough mixing and plasticization are required. Additionally, the core sheet has a relatively wide width (standard 1220mm), and current conventional extrusion screws used for extruded plastics struggle to completely fill the mold with this poorly flowing material. Moreover, current conventional extruders are unable to meet the extrusion requirements of the aforementioned material.

[0003] In addition, due to the poor fluidity of the material, the requirements for the extrusion die structure of the extruder are also very high. Conventional extrusion dies used for PE plastics are also difficult to meet the requirements for uniformity. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide an automatic production line for A2 non-combustible metal composite panels, which can produce A2 non-combustible metal composite panels.

[0005] To solve the above-mentioned technical problems, the technical solution of the present invention is: an automatic production line for A2 non-combustible metal composite panels, comprising...

[0006] An extruder for extruding core layer sheets, wherein the outlet of the extruder is equipped with an extrusion die;

[0007] An upper unwinding unit for unwinding upper metal sheets, the upper unwinding unit including an upper sheet unwinding machine and an upper sheet splicing machine located downstream of the upper sheet unwinding machine;

[0008] A lower unwinding unit for unwinding lower metal sheets, the lower unwinding unit including a lower sheet unwinding machine and a lower sheet splicing machine located downstream of the lower sheet unwinding machine.

[0009] A composite molding unit for laminating an upper metal plate, a core layer plate, and a lower metal plate; the composite molding unit includes a pre-compositing machine, where the upper metal plate, the core layer plate, the lower metal plate, and the upper and lower polymer films unwound from the upper and lower polymer film unwinding machines are gathered together for pre-compositing; a roller press laminating machine located downstream of the pre-compositing machine is used to press the upper metal plate, the upper polymer film, the core layer plate, the lower polymer film, and the lower metal plate together.

[0010] The front traction machine, located downstream of the roll forming machine, is used for front traction of the composite board;

[0011] A cooling device located downstream of the front traction machine is used to cool the composite plate.

[0012] A post-processing unit located downstream of the cooling device is used for post-processing of the composite board.

[0013] The extruder includes an extruder frame with an extrusion cylinder mounted on it. An extrusion screw, driven by an extrusion power unit, is rotatably mounted inside the extrusion cylinder. A feed hopper is located at one end of the extrusion cylinder, and the extrusion die is fixed at the other end. An air extraction port is located on the side of the extrusion cylinder near the extrusion die. A first heating device is fixed to the outside of the extrusion cylinder. The extrusion screw includes a rod body and a spiral with conical helical ridges integrally formed on the rod body. The extrusion screw includes a feeding section, a conveying section, a pre-plasticizing section, and a plasticizing section. The feed section, conveying section, pre-plasticizing section, and plasticizing section have progressively smaller lead angles in their screw edges. The lead angle of the screw edge in the compression section is smaller than that in the plasticizing and venting sections, while the lead angle of the screw edge in the venting section is larger than that in the metering section.

[0014] As a preferred embodiment, the post-processing device includes

[0015] The leveling and film-coating mechanism, located downstream of the cooling device, is used to coat the upper protective film unwound by the upper protective film unwinding machine and the lower protective film unwound by the lower protective film unwinding machine onto the upper and lower surfaces of the composite plate and to level the metal composite plate.

[0016] The trimming machine, located downstream of the leveling and laminating mechanism, is used to trim the composite board.

[0017] The rear traction machine, located downstream of the trimming machine, is used for rear traction of the composite board.

[0018] The cutting device, located downstream of the rear traction machine, is used to cut the composite board.

[0019] The stacking device, located downstream of the cutting device, is used to stack the cut composite boards.

[0020] As a preferred embodiment, the extrusion die includes a flat, elongated die body fixed to an extrusion cylinder. One end of the die body has a feed inlet for communication with the extrusion cylinder, and the other end has a flat, elongated forming outlet. The die body has a cavity connecting the feed inlet and the forming outlet. The cavity includes a main channel, a diffusion channel, and a flow-blocking and pressurizing channel. One end of the main channel is connected to the feed inlet, and the feed side of the diffusion channel is connected to the other end of the main channel. The diffusion channel extends from the main channel to the left and right sides and is adapted to the width of the core material. One end of the flow-blocking and pressurizing channel is connected to the diffusion channel, and the other end is connected to the flat, elongated forming outlet. The die body has a section extending into... The obstruction structure within the flow-blocking and pressurizing channel, along with a second heating device on the mold body, allows the feed inlet to connect with the outlet of the extruder. The extruder forces the material into the mold cavity via the extrusion screw, which then flows through the main channel and then through the diffusion channel to the left and right sides. The flow-blocking and pressurizing channel further obstructs and pressurizes the material, resulting in a core layer with the required thickness and width being extruded from the molding outlet. This extrusion mold achieves flow-blocking and pressurizing through its obstruction structure, increasing the extrusion pressure. This meets the extrusion requirements for A2 non-flammable materials with low plastic particle content. The second heating device can be a heating rod used to continuously heat the mold, ensuring the material is at a suitable temperature and preventing blockage due to excessively low temperatures.

[0021] As a preferred embodiment, the cross-sectional area of ​​the main channel gradually decreases from the feed inlet to the forming outlet. The cross-section of the diffusion channel includes an upstream inclined, gently converging section and a downstream sharply converging section. The sharply converging section connects to the flow-blocking and pressurizing channel. The diffusion channel includes a left diffusion section and a right diffusion section. The left diffusion section extends to the left at an inclination angle, and the right diffusion section extends to the right at an inclination angle of 4-7°. The gently converging section facilitates material entry, while the sharply converging section further increases the extrusion pressure and the compactness of the material. Simultaneously, the rapidly converging section allows denser material to gradually enter the flow-blocking and pressurizing channel, ensuring a better blocking and pressurizing effect from the blocking structure. The inclined left and right diffusion sections facilitate the uniform diffusion and distribution of material from left to right. Furthermore, due to the poor flowability of the material, setting the inclination angle to 4-7° ensures sufficient time for diffusion to both sides in the flow direction, ensuring that the material on both sides is also filled and guaranteeing the uniformity of the material output from the forming outlet.

[0022] As a preferred embodiment, the mold body is provided with a fixed die, and a movable die is slidably mounted on the mold body along the thickness direction. The movable die and the fixed die form the forming outlet. The mold body is provided with a die adjusting structure for adjusting the position of the movable die. The die adjusting structure includes a die adjusting screw rotatably mounted on the mold body, and the die adjusting screw is threadedly connected to the movable die. The position of the movable die can be adjusted by the die adjusting structure, thereby adjusting the thickness of the forming outlet to meet the extrusion requirements of core materials of different thicknesses.

[0023] As a preferred embodiment, the blocking structure includes a blocking plate movably mounted on the mold body. The mold body is provided with a blocking adjusting screw connected to the blocking plate. The blocking plate is slidably mounted on the side near the fixed die opening, and the blocking plate is inclined with its front end near the molding outlet. The length of the blocking plate extending into the flow-blocking and pressurizing channel can be adjusted by rotating the blocking adjusting screw, thereby adjusting the flow-blocking and pressurizing effect.

[0024] As a preferred embodiment, the compression section includes a first compression section and a second compression section. The lead angle of the first compression section is smaller than that of the second compression section, and the lead of the first compression section is smaller than that of the second compression section. The lead angle of the first compression section is 1-3°, and the lead angle of the second compression section is 9-11°. Therefore, the different lead angles of the first and second compression sections increase the axial force, which is beneficial for material compression and shear heat generation.

[0025] As a preferred embodiment, the screw thread thickness of the metering section is greater than that of the exhaust section, and the screw thread thickness of the metering section is 3-5 times that of the exhaust section.

[0026] As a preferred embodiment, the bottom of the extruder frame is equipped with support rollers and guide rails. The support rollers roll in cooperation with the guide rollers. The extruder frame is driven by an extruder frame adjustment device, which includes an adjustment base fixed to the ground. An adjustment motor is fixed on the adjustment base and connected to the extruder frame via a screw and nut mechanism. Therefore, the position of the frame can be adjusted as a whole using the extruder frame adjustment device, facilitating the adjustment of the overall extruder position in the composite board production line.

[0027] After adopting the above technical solution, the effect of the present invention is as follows: When in use, the material enters from the feed hopper, the extrusion screw is driven to rotate, and a first heating device is set on the outside of the extrusion cylinder to heat the material and plasticize it. The material passes through the feeding section, conveying section, pre-plasticizing section and plasticizing section in sequence to complete the feeding, conveying and plasticizing of the material. Among them, since the lead angle gradually decreases, the material conveying speed in the feeding section is the largest, which can effectively avoid the blockage of the feed port. When entering the pre-plasticizing section and plasticizing section, since the lead angle is even smaller, the conveying speed decreases and the extrusion pressure increases. At this time, there is enough plasticizing time to ensure the effect of plasticizing and mixing. Upon entering the compression section, the lead of the screw threads in this section is smaller than that in the plasticizing and venting sections. Therefore, the material conveying speed is minimal while the extrusion pressure is maximum in this compression section, facilitating extrusion in the venting and metering sections. The lead of the screw threads in the metering section is greater than that in the venting section, providing more space between the screw threads to fill the material. This allows for better venting of the material, ensuring that as much gas as possible is expelled and preventing air bubbles from forming in the formed core layer. Simultaneously, the increased conveying speed of the material in the venting section after the compression section allows for downstream transport, ensuring a more compact filling of the downstream extrusion die cavity. Therefore, this extruder screw is suitable for extruding A2 non-combustible composite board core material. The core layer is formed through extrusion. The core layer, upper metal plate, lower metal plate, upper polymer film, and lower polymer film are then laminated using a pre-composite and roller-press laminating machine. The laminated metal composite board then passes through a front traction machine, cooling device, and post-processing device to finally form the A2 non-combustible metal composite board. Attached Figure Description

[0028] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0029] Figure 1 This is a structural diagram of the extruder and basic mold according to an embodiment of the present invention;

[0030] Figure 2This is a structural diagram of the lower layer unwinding unit, the lower layer plate unwinding machine, the composite molding unit, and the front traction machine;

[0031] Figure 3 This is a schematic diagram of the cooling device and the leveling and coating mechanism;

[0032] Figure 4 This is a schematic diagram of the post-processing unit;

[0033] Figure 5 This is a front structural diagram of the extrusion die according to an embodiment of the present invention;

[0034] Figure 6 This is a side view of the extrusion die according to an embodiment of the present invention;

[0035] Figure 7 This is a bottom view of the extrusion die according to an embodiment of the present invention;

[0036] Figure 8 This is a partial structural diagram of the extrusion screw according to an embodiment of the present invention;

[0037] Figure 9 This is a partial structural diagram of the remaining part of the extrusion screw in an embodiment of the present invention;

[0038] In the attached diagram: 1. Extruder frame; 2. Extrusion barrel; 3. Extrusion screw; 31. Screw body; 32. Screw ribs; a1. Feed section; a2. Conveying section; a3. Pre-plasticizing section; a4. Plasticizing section; a5. First compression section; a6. Second compression section; a7. Exhaust section; a8. Metering section; b1. Feed lead; b2. Conveying lead; b3. Pre-plasticizing lead; b4. Plasticizing lead; b5. First compression lead; b6. Second compression lead; b7. 4. Exhaust lead; b8. Metering lead; c1. Feed section lead angle; c2. Conveying section lead angle; c3. Pre-plasticizing section lead angle; c4. Plasticizing section lead angle; c5. First compression section lead angle; c6. Second compression section lead angle; c7. Exhaust section lead angle; c8. Metering section lead angle; 4. Extrusion power unit; 5. Feed hopper; 6. Extrusion die; 61. Die body; 62. Feed inlet; 63. Forming outlet; 64. Main channel; 65. Expansion... 651. Slow-closing section; 652. Sharp-closing section; 653. Left diffuser section; 654. Right diffuser section; 66. Flow-blocking and pressurizing channel; 67. Baffle plate; 68. Second heating device; 69. Fixed die; 610. Movable die; 611. Die adjusting screw; 612. Baffle adjusting screw; 613. Buffer channel; 7. Air extraction port; 8. First heating device; 9. Support roller; 10. Guide rail; 11. Adjusting base; 12. 13. Adjusting motor; 14. Pre-laminating machine; 15. Lower layer polymer film unwinding machine; 16. Upper layer polymer film unwinding machine; 17. Upper layer unwinding unit; 18. Lower layer unwinding unit; 19. Roller laminating machine; 20. Front traction machine; 21. Cooling device; 22. Upper protective film unwinding machine; 23. Lower protective film unwinding machine; 24. Laminating roller group; 25. Leveling roller group; 26. Trimming machine; 27. Rear traction machine; 28. Cutting device; 29. ​​Stacking device. Detailed Implementation

[0039] The present invention will be further described in detail below through specific embodiments.

[0040] like Figures 1 to 3 As shown, an automated production line for A2 non-combustible metal composite panels includes...

[0041] An extruder for extruding core panels, wherein the outlet of the extruder is equipped with an extrusion die; the extruder is used to extrude A2 non-combustible core panels.

[0042] An upper unwinding unit 16 for unwinding the upper metal sheet includes an upper plate unwinding machine and an upper plate splicing machine located downstream of the upper plate unwinding machine; a lower unwinding unit 17 for unwinding the lower metal sheet includes a lower plate unwinding machine and a lower plate splicing machine located downstream of the lower plate unwinding machine; wherein the materials of the upper and lower metal sheets can be selected according to actual conditions, such as stainless steel, aluminum, or galvanized sheet.

[0043] A composite molding unit for laminating an upper metal plate, a core layer plate, and a lower metal plate; the composite molding unit includes a pre-compositing machine 13, where the upper metal plate, the core layer plate, the lower metal plate, and the upper and lower polymer films unwound from the upper polymer film unwinding machine 15 and the lower polymer film unwinding machine 14 are gathered together for pre-compositing; a roller press laminating machine 18 located downstream of the pre-compositing machine 13 is used to press the upper metal plate, the upper polymer film, the core layer plate, the lower polymer film, and the lower metal plate together.

[0044] The front traction machine 19, located downstream of the roll forming machine 18, is used for front traction of the composite plate.

[0045] The cooling device 20, located downstream of the front traction machine 19, is used to cool the composite plate.

[0046] A post-processing device located downstream of the cooling device 20 is used for post-processing of the composite board.

[0047] The post-processing device includes

[0048] The leveling and laminating mechanism, located downstream of the cooling device 20, is used to laminate the upper protective film unwound by the upper protective film unwinding machine 21 and the lower protective film unwound by the lower protective film unwinding machine 22 onto the upper and lower surfaces of the composite plate and to level the metal composite plate. The leveling and laminating mechanism includes a laminating roller group 23 and a leveling roller group 24, wherein the upper protective film, the lower protective film and the composite plate are laminated in the laminating roller group 23 and then leveled by the subsequent leveling roller group 24.

[0049] The trimming machine 25, located downstream of the leveling and laminating mechanism, is used to trim the composite board.

[0050] The rear traction machine 26, located downstream of the trimming machine 25, is used for rear traction of the composite board.

[0051] The cutting device 27, located downstream of the rear traction machine 26, is used to cut the composite board.

[0052] The stacking device 28, located downstream of the cutting device 27, is used to stack the cut composite boards.

[0053] The lead angle in this embodiment is a well-known technique in the art, also known as the thread helix angle, which is the angle between the tangent to the helix on the screw's mean diameter cylinder and a plane perpendicular to the thread axis.

[0054] like Figure 4-9 As shown, an A2 non-combustible composite board core material extruder includes an extruder frame 1, an extrusion cylinder 2 mounted on the extruder frame 1, an extrusion screw 3 driven by an extrusion power device 4 rotatably mounted inside the extrusion cylinder 2, a feed hopper 5 at one end of the extrusion cylinder 2, and an extrusion die 6 fixed at the other end. An air extraction port 7 is provided on the side of the extrusion cylinder 2 near the extrusion die 6. A first heating device 8 is fixed to the outside of the extrusion cylinder 2. The extrusion screw 3 includes a rod body and a spiral helix integrally formed into a conical shape on the rod body. The extrusion screw 3 includes a feeding section a1, a conveying section a2, a pre-plasticizing section a3, a plasticizing section a4, and a compression section a5. The feed section a1, conveying section a2, pre-plasticizing section a3, and plasticizing section a4 have progressively smaller lead angles. The lead angle of the screw threads in the compression section is smaller than that in the plasticizing section a4 and the venting section a7, while the lead angle of the screw threads in the venting section a7 is larger than that in the metering section a8.

[0055] In this embodiment, the lead of the screw thread in the feeding section a1 is referred to as the feeding lead b1, and so on, i.e., feeding lead b1 > conveying lead b2 > pre-plasticizing lead b3 > plasticizing lead b4 > compression lead, metering lead b8 > venting lead b7 > compression lead; the lead angle of the screw thread in the feeding section a1 is referred to as the feeding section lead angle c1, and so on, i.e., feeding section lead angle c1 > conveying section lead angle c2 > pre-plasticizing section lead angle c3 > plasticizing section lead angle c4 > compression section lead angle, venting section lead angle c7 > compression section lead angle, venting section lead angle c7 > metering section lead angle c8. The extrusion power unit 4 can be a motor.

[0056] The compression section includes a first compression section a5 and a second compression section a6. The lead angle of the first compression section a5 is smaller than the lead angle of the second compression section a6, referred to as the first compression section lead angle c5 and the second compression section lead angle c6. The lead of the first compression section a5 is smaller than the lead of the second compression section a6, referred to as the first compression lead b5 and the second compression lead b6. In this embodiment, the lead angle c5 of the first compression section is 1-3°, and the lead angle c6 of the second compression section is 9-11°.

[0057] In this embodiment, the screw thread thickness of metering section a8 is greater than that of exhaust section a7, and the screw thread thickness of metering section a8 is 3-5 times that of exhaust section a7. The extrusion die 6 includes a flat, elongated die body 61 fixed to the extrusion cylinder 2. One end of the die body 61 is provided with a feed inlet 62 for communicating with the extrusion cylinder 2, and the other end is provided with a flat, elongated forming outlet 63. The die body 61 is provided with a die cavity connecting the feed inlet 62 and the forming outlet 63. The die cavity includes a main channel 64, a diffusion channel 65, and a flow-blocking and pressurizing channel 66. One end of the main channel 64 is connected to the feed inlet 62, and the feed side of the diffusion channel 65 is connected to the other end of the main channel 64. The diffusion channel 65 disperses to the left and right sides from the position of the main channel 64 and is adapted to the width of the core material. One end of the flow-blocking and pressurizing channel 66 is connected to the diffusion channel 65, and the other end is connected to the flat, elongated forming outlet 63. The die body 61 is provided with a blocking structure extending into the flow-blocking and pressurizing channel 66. The die body 61 is also provided with a second heating device 68.

[0058] A fixed die 69 is provided on the mold body 61, which is defined as the thickness direction perpendicular to the material flow direction. A movable die 610 is slidably installed on the mold body 61 along the thickness direction. The movable die 610 and the fixed die 69 form the forming outlet 63. A die adjusting structure is provided on the mold body 61 to adjust the position of the movable die 610. The die adjusting structure includes a die adjusting screw 611 rotatably installed on the mold body 61. The die adjusting screw 611 is threadedly connected to the movable die 610.

[0059] In this embodiment, the blocking structure includes a blocking plate 67 movably mounted on the mold body 61. The mold body 61 is provided with a blocking adjusting screw 612 connected to the blocking plate 67. The blocking plate 67 is slidably mounted on the side close to the fixed die 69. The blocking plate 67 is inclined and its front end is closer to the molding outlet 63.

[0060] The cross-sectional area of ​​the main channel 64 gradually decreases from the feed inlet 62 to the forming outlet 63. The cross-section of the diffusion channel 65 includes an upstream inclined, gently converging section 651 and a downstream sharply converging section 652, which connects to the flow-blocking and pressurizing channel 66. The diffusion channel 65 includes a left diffusion section 653 and a right diffusion section 654. The left diffusion section 653 extends inclined to the left, and the right diffusion section 654 extends inclined to the right. The inclination angles of the left diffusion section 653 and the right diffusion section 654 are the same and are inclined between 4-7°. In this embodiment, a buffer channel 613 is also provided downstream of the flow-blocking and pressurizing channel 66. The thickness of the cross-section of the buffer channel 613 is greater than the thickness of the forming outlet 63.

[0061] The bottom of the extruder frame 1 is provided with support rollers 9 and guide rails 10. The support rollers 9 are in rolling cooperation with the guide rollers. The extruder frame 1 is driven by an adjustment device. The adjustment device includes an adjustment base 11 fixed on the ground. An adjustment motor 12 is fixed on the adjustment base 11. The adjustment motor 12 is connected to the extruder frame 1 through a screw and nut mechanism.

[0062] In addition, in this embodiment, the position of the movable die 610 can be adjusted by adjusting the die adjusting screw 611, thereby adjusting the thickness of the forming outlet 63. The position of the extruder frame 1 can be adjusted by the frame adjusting device, which makes it convenient to adjust the position of the overall extruder in the composite board production line.

[0063] The above-described embodiments are merely preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Any modifications and alterations made to the technical solutions of the present invention without departing from the spirit of the present invention shall fall within the protection scope defined by the claims of the present invention.

Claims

1. An automated production line for A2 non-combustible metal composite panels, comprising: An extruder for extruding core layer sheets, wherein the outlet of the extruder is equipped with an extrusion die; An upper unwinding unit for unwinding upper metal sheets, the upper unwinding unit including an upper sheet unwinding machine and an upper sheet splicing machine located downstream of the upper sheet unwinding machine; A lower unwinding unit for unwinding lower metal sheets, the lower unwinding unit including a lower sheet unwinding machine and a lower sheet splicing machine located downstream of the lower sheet unwinding machine. A composite molding unit for laminating an upper metal plate, a core layer plate, and a lower metal plate; the composite molding unit includes a pre-laminating machine, an upper metal plate, a core layer plate, a lower metal plate, and upper and lower polymer films unwound from an upper polymer film unwinding machine and a lower polymer film unwinding machine, which are then collected in the pre-laminating machine for pre-lamination; a roller laminating machine located downstream of the pre-laminating machine is used to press the upper metal plate, upper polymer film, core layer plate, lower polymer film, and lower metal plate together; characterized in that: Also includes The front traction machine, located downstream of the roll forming machine, is used for front traction of the composite board; A cooling device located downstream of the front traction machine is used to cool the composite plate. A post-processing unit located downstream of the cooling device is used for post-processing of the composite board. The extruder includes an extruder frame with an extrusion cylinder mounted on it. An extrusion screw, driven by an extrusion power unit, is rotatably mounted inside the extrusion cylinder. A feed hopper is located at one end of the extrusion cylinder, and the extrusion die is fixed at the other end. An air extraction port is located on the side of the extrusion cylinder near the extrusion die. A first heating device is fixed to the outside of the extrusion cylinder. The extrusion screw includes a rod body and a spiral with conical helical ridges on the rod body. The extrusion screw includes a feeding section, a conveying section, a pre-plasticizing section, and a plasticizing section. The feed section, conveying section, pre-plasticizing section, and plasticizing section have progressively smaller lead angles in their screw edges. The lead angle of the screw edge in the compression section is smaller than that in the plasticizing and venting sections, while the lead angle of the screw edge in the venting section is larger than that in the metering section.

2. The automated production line for A2 non-combustible metal composite panels as described in claim 1, characterized in that: The post-processing device includes The leveling and film-coating mechanism, located downstream of the cooling device, is used to coat the upper protective film unwound by the upper protective film unwinding machine and the lower protective film unwound by the lower protective film unwinding machine onto the upper and lower surfaces of the composite plate and to level the metal composite plate. The trimming machine, located downstream of the leveling and laminating mechanism, is used to trim the composite board. The rear traction machine, located downstream of the trimming machine, is used for rear traction of the composite board. The cutting device, located downstream of the rear traction machine, is used to cut the composite board. The stacking device, located downstream of the cutting device, is used to stack the cut composite boards.

3. The automated production line for A2 non-combustible metal composite panels as described in claim 2, characterized in that: The extrusion die includes a flat, elongated die body fixed to an extrusion cylinder. One end of the die body has a feed inlet for communication with the extrusion cylinder, and the other end has a flat, elongated forming outlet. The die body has a cavity connecting the feed inlet and the forming outlet. The cavity includes a main channel, a diffusion channel, and a flow-blocking and pressurizing channel. One end of the main channel is connected to the feed inlet, and the feed side of the diffusion channel is connected to the other end of the main channel. The diffusion channel extends from the main channel to the left and right sides and is adapted to the width of the core material. One end of the flow-blocking and pressurizing channel is connected to the diffusion channel, and the other end is connected to the flat, elongated forming outlet. The die body has a blocking structure extending into the flow-blocking and pressurizing channel, and a second heating device is also provided on the die body.

4. The automated production line for A2 non-combustible metal composite panels as described in claim 3, characterized in that: The cross-sectional area of ​​the main channel gradually decreases from the feed inlet to the forming outlet. The cross-section of the diffusion channel includes an upstream inclined gently converging section and a downstream sharply converging section. The sharply converging section is connected to the flow-blocking and pressurizing channel. The diffusion channel includes a left diffusion section and a right diffusion section. The left diffusion section extends to the left at an inclination, and the right diffusion section extends to the right at an inclination. The inclination angles of the left diffusion section and the right diffusion section are the same and are inclined between 4-7°.

5. The automated production line for A2 non-combustible metal composite panels as described in claim 4, characterized in that: The mold body is provided with a fixed die, and a movable die is slidably installed on the mold body along the thickness direction. The movable die and the fixed die form the forming outlet. The mold body is provided with a die adjusting structure for adjusting the position of the movable die. The die adjusting structure includes a die adjusting screw rotatably installed on the mold body, and the die adjusting screw is threadedly connected to the movable die.

6. The automated production line for A2 non-combustible metal composite panels as described in claim 5, characterized in that: The blocking structure includes a blocking plate movably mounted on the mold body. The mold body is provided with a blocking adjusting screw connected to the blocking plate. The blocking plate is slidably mounted on the side close to the fixed die opening. The blocking plate is inclined and its front end is close to the molding exit.

7. An automated production line for A2 non-combustible metal composite panels as described in claim 2, characterized in that: The compression section includes a first compression section and a second compression section. The lead angle of the first compression section is smaller than the lead angle of the second compression section, and the lead of the first compression section is smaller than the lead of the second compression section. The lead angle of the first compression section is 1-3°, and the lead angle of the second compression section is 9-11°.

8. The automated production line for A2 non-combustible metal composite panels as described in claim 7, characterized in that: The thickness of the screw thread in the metering section is greater than that in the exhaust section, and the thickness of the screw thread in the metering section is 3-5 times that in the exhaust section.

9. An automated production line for A2 non-combustible metal composite panels as described in claim 7, characterized in that: The bottom of the extruder frame is provided with support rollers and guide rails. The support rollers are in rolling cooperation with the guide rollers. The extruder frame is driven by an extruder frame adjustment device. The extruder frame adjustment device includes an adjustment base fixed on the ground. An adjustment motor is fixed on the adjustment base. The adjustment motor is connected to the extruder frame through a screw and nut mechanism.

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