Fireproof aluminum composite panel continuous hot pressing composite forming device and method

Abstract

A kind of fireproof aluminium composite panel continuous hot pressing composite forming device and method, including embossing machine, adhesive film unwinding frame, aluminium alloy panel unwinding frame and hot pressing composite machine.Embossing machine includes the embossing roller distributed on the upper and lower sides of core material, and the embossing roller forms exhaust groove on the surface of core material;Hot pressing composite machine includes hot pressing composite roller, and hot pressing composite roller includes multiple independent temperature control zones along axial direction, and the temperature of part independent temperature control zone gradually reduces from center area to both sides, so that the softening adhesion process of adhesive film is carried out from center area to both sides, while the gas generated by hot pressing process is discharged from center area to both sides through embossing pattern.The present application preforms exhaust groove on the surface of core material, and combines with hot pressing roller axial partition temperature control, so that air in composite interface and endogenous gas released by core material heated can be directionally discharged from center to both sides along groove in adhesion process, to avoid the defects of blistering and delamination caused by gas retention.

Description

Technical Field

[0001] This invention belongs to the technical field of fireproof aluminum composite panels, specifically referring to a continuous hot-pressing composite molding device and method for fireproof aluminum composite panels. Background Technology

[0002] A2-grade fire-resistant aluminum composite panels are composed of two layers of aluminum alloy panels and a non-combustible inorganic core material. The core material primarily consists of inorganic flame-retardant fillers such as aluminum hydroxide and magnesium hydroxide, offering both excellent fire safety and decorative properties. The manufacturing process involves mixing inorganic powder with polymer adhesives, extruding and undergoing multi-stage baking and rolling to create the core material. Polymer adhesive films are then attached to both sides of the core material, which is then stacked with the coated aluminum alloy panels. The panels are then fed into a hot press roller and continuously hot-pressed under uniform pressure and a temperature of 120-150°C. Finally, the panels are cooled, shaped, trimmed, and cut to produce the finished product.

[0003] During hot-pressing, the inorganic flame-retardant fillers such as aluminum hydroxide and magnesium hydroxide in the core material release internal gases like water vapor upon heating. Simultaneously, air inevitably gets trapped at the interface between the core material and the aluminum plate. As hot pressing progresses, the polymer adhesive film gradually melts and seals the edges of the plate first, trapping the aforementioned gases within the composite interface. Lacking effective directional escape channels, these accumulated gases form high-pressure cavitation at the interface, manifesting as blistering on the plate surface or delamination between the aluminum plate and the core material upon cooling, affecting the appearance quality and bonding reliability of the plate. Summary of the Invention

[0004] In view of the above situation and to overcome the defects of the prior art, the purpose of the present invention is to provide a continuous hot-pressing composite molding apparatus and method for fireproof aluminum composite panels, so as to at least partially solve the problems mentioned in the background art.

[0005] The technical solution adopted in this invention is as follows: A continuous hot-pressing composite molding device for fireproof aluminum composite panels is proposed, comprising: The embossing machine is installed on the conveying path of the core material; An adhesive film unwinding rack is arranged on the rear side of the embossing machine along the conveying direction of the core material, and provides adhesive film to the upper and lower surfaces of the core material through the adhesive film unwinding roller; An aluminum alloy panel unwinding frame is arranged on the rear side of the adhesive film unwinding frame along the conveying direction, and provides aluminum alloy panels to the upper and lower surfaces of the adhesive film through aluminum alloy panel unwinding rollers. The hot press laminating machine is located on the rear side of the aluminum alloy panel unwinding frame along the conveying direction; The embossing machine includes embossing rollers distributed on the upper and lower sides of the core material. The surface of the embossing rollers is provided with raised embossing patterns, and the embossing patterns form exhaust grooves on the surface of the core material. The hot-pressing laminating machine includes hot-pressing laminating rollers distributed on the upper and lower surfaces of the aluminum alloy panel. The hot-pressing laminating rollers include multiple independent temperature control zones along the axial direction, and the temperature of some of the independent temperature control zones gradually decreases from the center area to both sides, so that the softening and bonding process of the adhesive film proceeds from the center area to both sides, while the gas generated during the hot pressing process is discharged from the center area to both sides through the embossing patterns.

[0006] Furthermore, the independent temperature control zones are configured as five along the axial direction, and each independent temperature control zone includes a central temperature zone, a transition temperature zone, and an edge temperature zone from the middle to both sides. The transition temperature zone includes a symmetrically distributed left transition temperature zone and a right transition temperature zone, and the edge temperature zone includes a symmetrically distributed left edge temperature zone and a right edge temperature zone. The central temperature zone occupies 30-40% of the total width of the roller surface, the transition temperature zone occupies 15-20% of the total width of the roller surface, and the edge temperature zone occupies 15-20% of the total width of the roller surface.

[0007] Furthermore, each of the independent temperature control zones is equipped with an independent heating element and a temperature sensor, and a heat insulation ring is provided between adjacent independent temperature control zones. The heating element includes an electric heating tube or a hot oil circulation loop. Each of the independent temperature control zones has 6 to 12 electric heating tubes evenly distributed along the circumference of the inner wall of the roller, or an independent hot oil circulation loop within each independent temperature control zone.

[0008] Furthermore, the hot-pressing composite rollers are configured in multiple groups along the conveying direction, and the multiple groups of hot-pressing composite rollers include at least a low-temperature preheating and venting section, a high-temperature melting and bonding section, a heat preservation and curing section, and a slow-cooling auxiliary shaping section. In one or more of the low-temperature preheating and venting section, the temperature of the center temperature zone, the transition temperature zone, and the edge temperature zone gradually decreases, and the temperature difference between the center temperature zone and the edge temperature zone gradually decreases along the conveying direction.

[0009] Furthermore, in the low-temperature preheating and exhaust section, the temperature difference between the center temperature zone and the edge temperature zone is set to be controlled at 15~20℃; in the heat preservation, curing and shaping section, the temperature difference between the center temperature zone and the edge temperature zone is set to be controlled at 0~10℃; in the heat preservation, curing and shaping section, the temperature difference between the center temperature zone and the edge temperature zone is set to be controlled at 0~5℃; and in the slow cooling auxiliary shaping section, the hot-pressing composite roller is set to uniformly heat in the axial direction.

[0010] Furthermore, the exhaust grooves on the upper and lower bonding surfaces of the core material are staggered along the conveying direction, with the upper exhaust groove and the lower exhaust groove being staggered by half a cycle. The stagger distance between any two adjacent upper and lower exhaust grooves is half the distance between two adjacent exhaust grooves on the same side.

[0011] Furthermore, the exhaust groove has a triangular or trapezoidal cross-sectional structure, and the sidewall inclination angle of the exhaust groove is 30~60°.

[0012] A second aspect of the present invention provides a continuous hot-pressing composite molding method for fire-resistant aluminum composite panels, using the aforementioned continuous hot-pressing composite molding apparatus for fire-resistant aluminum composite panels, comprising the following steps: Step 1: Pass the cured adhesive film through an embossing machine, and use the embossing rollers on the embossing machine to press multiple air venting grooves extending in the width direction of the adhesive film onto the upper and lower bonding surfaces of the adhesive film. Step 2: Apply adhesive film to the upper and lower sides of the core material using an adhesive film unwinding frame, and apply aluminum alloy panels to the outer side of the upper and lower adhesive films using an aluminum alloy panel unwinding frame to form a composite slab blank. Step 3: The blank to be composited is fed into the hot press composite machine. Hot press composite is performed using the hot press composite roller with axial temperature partitions set in the hot press composite machine. The hot press composite roller is set with five independent temperature control zones along the axial direction, and the temperature of some of the independent temperature control zones gradually decreases from the center area to both sides. Step 4: During the hot-pressing composite process, the exhaust groove provides an exhaust channel for the air at the composite interface and the internal gas released by the core material, and the zoned temperature control of the independent temperature control zone ensures that the generation and exhaust of gas proceed from the middle to both sides. Step 5: After hot pressing and lamination, the sheet material is cooled and shaped to obtain the finished A2-grade fireproof aluminum composite panel.

[0013] Furthermore, the cross-sectional shape of the exhaust groove in step 1 is "V" or trapezoidal, and in step 4, the temperature of hot pressing is 110~150℃, and the linear velocity is 2~3m / min.

[0014] Furthermore, in step 4, the multiple sets of hot-press composite rollers include at least a low-temperature preheating and venting section, a high-temperature melting and bonding section, a heat preservation and curing shaping section, and a slow-cooling auxiliary shaping section. The adhesive film on the surface of the core material includes a film adhesion area and a hot-press bonding area. In the film adhesion area, there is an intermittent venting channel between the adhesive film and the venting groove. In the hot-press bonding area, the adhesive film melts and fills the venting groove to seal the venting channel.

[0015] Beneficial effects: This invention utilizes pre-formed venting grooves on the core material surface, combined with axial zoned temperature control of the hot press rollers. This allows air in the composite interface and internal gases released by the core material during heating to be directionally discharged from the center to both sides along the grooves during the bonding process, avoiding bubbling and delamination defects caused by gas retention. Zoned temperature control enables gradual softening and bonding of the adhesive film. The edge areas, due to their lower temperature, experience delayed closure, providing ample time for gas discharge. The staggered distribution of the grooves ensures efficient venting while preventing localized thinning of the core material. The multi-segment hot press roller assembly, combined with differentiated temperature control, balances venting effectiveness with composite strength. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of a continuous hot-pressing composite molding device for fireproof aluminum composite panels according to an embodiment of the present invention. Figure 2 This is a schematic diagram of the internal structure of a continuous hot-pressing composite molding device for fireproof aluminum composite panels according to an embodiment of the present invention. Figure 3 This is a three-dimensional structural diagram of a fireproof aluminum composite panel in a continuous hot-pressing composite molding state according to an embodiment of the present invention; Figure 4 This is a schematic diagram of a continuous hot-pressing composite molding process for a fireproof aluminum composite panel according to an embodiment of the present invention. Figure 5 This is a schematic diagram of the internal structure of the hot-pressing composite roller proposed in an embodiment of the present invention; Figure 6 This is a schematic diagram of the structure of the venting grooves on the surface of the core material proposed in an embodiment of the present invention.

[0017] Among them, 01 is the core material; 010 is the venting groove; 02 is the adhesive film; 021 is the film adhesion area; 022 is the hot-press bonding area; 03 is the aluminum alloy panel; 10 is the embossing machine; 11 is the embossing roller; 111 is the embossing pattern; 20 is the adhesive film unwinding frame; 21 is the adhesive film unwinding roller; 30 is the aluminum alloy panel unwinding frame; 31 is the aluminum alloy panel unwinding roller; 40 is the hot-press laminating machine; 41 is the hot-press laminating roller; and 411 is the independent temperature control area.

[0018] The accompanying drawings are provided to further understand the embodiments and form part of the specification. They are used together with the embodiments for explanation and do not constitute a limitation on the embodiments. Detailed Implementation

[0019] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection.

[0020] In the description of the embodiments, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing the embodiments and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments.

[0021] like Figure 1 and Figure 2 As shown in the figure, an embodiment of the present invention provides a continuous hot-pressing composite molding device for fireproof aluminum composite panels, including an embossing machine 10, an adhesive film unwinding frame 20, an aluminum alloy panel unwinding frame 30, and a hot-pressing composite machine 40.

[0022] The embossing machine 10 is set on the conveying path of the core material 01. The core material 01 is a non-combustible inorganic core material strip that is continuously extruded and cured. Its thickness is usually 6 to 12 mm. The core material 01 is continuously fed into the embossing machine 10 by the traction device of the previous process.

[0023] Furthermore, the adhesive film unwinding frame 20 is positioned behind the embossing machine 10 along the conveying direction of the core material 01, and provides polymer adhesive film 02 to the upper and lower surfaces of the core material 01 respectively through the upper and lower adhesive film unwinding rollers 21. The adhesive film 02 is a hot melt adhesive film, which is a solid film at room temperature with a thickness of 0.05 to 0.15 mm. It softens and melts when heated to 110 to 150°C and has adhesive properties.

[0024] Furthermore, the aluminum alloy panel unwinding frame 30 is positioned behind the adhesive film unwinding frame 20 along the conveying direction, and provides aluminum alloy panels 03 to the outer surfaces of the upper and lower adhesive films 02 via two upper and lower aluminum alloy panel unwinding rollers 31, respectively. The aluminum alloy panel 03 is a continuous aluminum strip, and its surface can be pre-coated with a decorative layer, typically with a thickness of 0.3–0.5 mm.

[0025] The hot press laminating machine 40 is located behind the aluminum alloy panel unwinding rack 30 along the conveying direction. The above-mentioned components are arranged along a straight conveying line. The core material 01, adhesive film 02, and aluminum alloy panel 03 are stacked sequentially during movement to form a five-layer structure of aluminum alloy panel 03, adhesive film 02, core material 01, adhesive film 02, and aluminum alloy panel 03. Then, it enters the hot press laminating machine 40 for heating and pressurizing lamination.

[0026] Furthermore, the embossing machine 10 includes embossing rollers 11 distributed on the upper and lower sides of the core material 01. The upper and lower embossing rollers 11 are arranged in pairs, and the gap between the roller surfaces is slightly smaller than the original thickness of the core material 01 to ensure that the embossing pattern 111 can be pressed into the surface of the core material 01. The surface of the embossing roller 11 is provided with raised embossing patterns 111, and the cross-sectional shape of the embossing pattern 111 is complementary to the cross-sectional shape of the required air venting groove 010.

[0027] When the core material 01 passes through the embossing roller 11, the embossing pattern 111 simultaneously presses out venting grooves 010 extending along the width direction of the core material 01 on both the upper and lower surfaces of the core material 01. These venting grooves 010 form continuous, open grooves on the surface of the core material 01, with their length direction perpendicular to or intersecting the conveying direction, and extending to the side edges of the core material 01 at both ends. It should be noted that the venting grooves 010 are only pressed on the surface of the core material 01 and do not penetrate the thickness of the core material 01.

[0028] Furthermore, the hot press laminating machine 40 includes hot press laminating rollers 41 distributed on the upper and lower surfaces of the aluminum alloy panel 03. The upper and lower hot press laminating rollers 41 are arranged in pairs to apply linear pressure and heat to the passing laminated slab. The hot press laminating rollers 41 include multiple independent temperature control zones 411 along the axial direction, and the temperature of some of the independent temperature control zones 411 gradually decreases from the central area to both sides.

[0029] This temperature distribution causes the softening, melting, and bonding processes of the adhesive film 02 at the composite interface to be completed asynchronously. It starts from the central area in the width direction of the board and then gradually expands to the left and right sides. Since the venting grooves 010 on the core material 01 are always connected to the two edges of the board, the gas generated during the hot pressing process, including the air trapped during stacking and the water vapor released by the core material 01 when heated, will naturally be squeezed from the high-temperature, softened central area to the low-temperature, unsoftened edge area, and continuously discharged to the side of the board along the venting grooves 010, thereby avoiding the accumulation of gas inside the interface.

[0030] like Figure 5 As shown, five independent temperature control zones 411 are arranged axially. From the center to both sides, they include a central temperature zone, a transition temperature zone, and an edge temperature zone. The transition temperature zone includes symmetrically distributed left and right transition temperature zones, and the edge temperature zones include symmetrically distributed left and right edge temperature zones. The central temperature zone occupies 30-40% of the total width of the roll surface, the transition temperature zone occupies 15-20% of the total width of the roll surface, and the edge temperature zone occupies 15-20% of the total width of the roll surface. Among them, the central temperature zone completely covers the central area of ​​the board surface, the transition temperature zone covers the part of the board surface near the edge, and the edge temperature zone covers the edge of the board surface and the slightly outer area, thus forming a temperature gradient that gradually decreases from the center to the edge along the entire width of the board.

[0031] Furthermore, each independent temperature control zone 411 is equipped with an independent heating element and temperature sensor, and an insulation ring is provided between adjacent independent temperature control zones 411 to reduce lateral heat conduction and ensure stable temperature difference between each zone.

[0032] In some embodiments, the heating element can be an electric heating tube or a hot oil circulation loop. When an electric heating tube is used, 6 to 12 electric heating tubes are evenly distributed along the circumference of the inner wall of the roller in each independent temperature control zone 411. The heating tubes in each temperature zone are PID-regulated by an independent temperature control instrument based on feedback from the temperature sensor. When hot oil circulation heating is used, each independent temperature control zone 411 has an independent hot oil flow channel, and zoned temperature control is achieved by supplying hot oil at different temperatures. The heat insulation ring is usually made of high-temperature resistant, low-thermal-conductivity material such as ceramic fiber, and is embedded in the annular groove of the roller between adjacent temperature zones.

[0033] Furthermore, the hot-pressing composite rollers 41 are arranged in multiple groups along the conveying direction. In actual equipment, multiple pairs of hot-pressing composite rollers 41 are usually arranged sequentially along the production line, and these roller pairs together form the hot-pressing composite machine 40. The multiple groups of hot-pressing composite rollers 41 include at least a low-temperature preheating and exhaust section, a high-temperature melting and bonding section, a heat preservation and curing section, and a slow cooling auxiliary shaping section. The functions of each section are as follows: In the low-temperature preheating exhaust section: it usually consists of 1 to 2 pairs of hot press rollers with a low temperature setting, such as 110 to 120°C in the center temperature zone. This mainly softens the adhesive film 02 initially and keeps the exhaust groove 010 open. At the same time, it utilizes the large temperature difference between the center and the edge, 15 to 25°C, to drive the gas to be discharged from the center to the edge.

[0034] In the high-temperature melting and bonding section: usually composed of 2 to 3 pairs of hot press rollers, the temperature reaches the peak, for example, the central temperature zone 140 to 150°C, so that the adhesive film 02 is completely melted and fully wets the core material 01 and the surface of the aluminum plate, while maintaining a certain temperature difference, 0 to 10°C, to continue to assist in venting.

[0035] In the heat preservation and curing stage: it usually consists of 1 to 2 pairs of hot press rollers. The temperature is slightly reduced, for example, the central temperature zone is 120 to 130°C, and the temperature difference is further reduced to 0 to 5°C. This allows the molten adhesive film O2 to cool and solidify uniformly without a significant temperature gradient, while preventing the edges from closing prematurely.

[0036] In the slow cooling and shaping section: it usually consists of a pair of hot press rollers, which are set to uniformly cool axially. The temperature is further reduced to 80-100℃, so that the board is cooled evenly and slowly, reducing thermal stress deformation.

[0037] In one or more of the aforementioned low-temperature preheating and exhaust section, high-temperature melting and bonding section, and heat preservation and curing section, the temperatures of the central temperature zone, transition temperature zone, and edge temperature zone gradually decrease, and the temperature difference between the central temperature zone and the edge temperature zone gradually decreases along the conveying direction. For example: the temperature difference in the low-temperature preheating and exhaust section is 20℃, the temperature difference in the high-temperature melting and bonding section is 10℃, the temperature difference in the heat preservation and curing section is 3℃, and the temperature difference in the slow cooling auxiliary curing section is 0℃.

[0038] In the low-temperature preheating exhaust section, the temperature difference between the central and edge temperature zones is controlled between 15 and 25°C. This temperature difference causes the adhesive film 02 in the central region to soften first, while the edge region remains solid or semi-solid, thus forming a pressure gradient from the inside out, driving the gas to be discharged to both sides along the exhaust groove 010. If the temperature difference is too small, the gas discharge power will be insufficient; if the temperature difference is too large, it may cause excessive heat deformation of the core material 01 at its center.

[0039] In the high-temperature melting and bonding section, the temperature difference between the central temperature zone and the edge temperature zone is controlled between 0 and 10°C. At this point, most of the gas has been expelled. The temperature difference is appropriately reduced to ensure that the adhesive film O2 can be fully melted and bonded throughout the entire width of the board, while still maintaining a certain temperature difference to expel residual trace amounts of gas.

[0040] During the heat preservation and curing stage, the temperature difference between the central and edge temperature zones is controlled between 0 and 5°C. At this point, the interface is basically sealed, and the small temperature difference helps the O2 adhesive film to cure evenly, avoiding internal stress caused by excessive cooling at the edges.

[0041] In the slow cooling and shaping section, the hot-pressing composite roller 41 is set to uniformly heat in the axial direction, that is, the temperature of the center temperature zone, the transition temperature zone, and the edge temperature zone is the same. The purpose is to make the board uniformly cooled to near room temperature and prevent warping and deformation caused by uneven temperature.

[0042] like Figure 3 and Figure 4 As shown, the exhaust grooves 010 on the upper and lower bonding surfaces of the core material 01 are staggered along the conveying direction. Specifically, the upper exhaust groove 010 and the lower exhaust groove 010 are staggered by half a cycle. The half cycle means that the stagger distance between any two adjacent upper and lower exhaust grooves 010 in the conveying direction is equal to half the distance between two adjacent exhaust grooves 010 on the same side.

[0043] For example, if the center distance between adjacent grooves on the upper surface is 20mm, then the projected offset between the upper and lower surface grooves in the conveying direction is 10mm. This staggered structure avoids overlap of the upper and lower grooves in the thickness direction, preventing excessive weakening of the core material 01 at the overlap point. Simultaneously, the staggered arrangement allows the gas discharge paths of the upper and lower interfaces to be staggered, facilitating uniform gas discharge from both sides of the core material 01 and reducing localized stagnation.

[0044] In some embodiments, the cross-sectional structure of the venting groove 010 is triangular (V-shaped) or trapezoidal. The triangular cross-section facilitates demolding by the embossing roller 11, while the gentle slope of the trapezoidal cross-section is beneficial for subsequent filling with the adhesive film 02. The sidewall inclination angle of the venting groove 010 is 30–60°. The sidewall inclination angle refers to the angle between the groove sidewall and the normal to the surface of the core material 01. Too small an inclination angle will easily cause cracks on the surface of the core material 01 during embossing, while too large an inclination angle will result in insufficient groove depth, affecting venting capacity. A range of 30–60° balances embossing formability, venting efficiency, and subsequent melt-filling effect.

[0045] A second aspect of this invention provides a continuous hot-pressing composite molding method for fire-resistant aluminum composite panels, using the aforementioned continuous hot-pressing composite molding apparatus for fire-resistant aluminum composite panels, comprising the following steps: Step 1: Embossing to form venting grooves 010: The cured core material 01 is passed through an embossing machine 10. The embossing roller 11 on the embossing machine 10 presses multiple venting grooves 010 extending along the width direction of the core material 01 onto the upper and lower mating surfaces of the core material 01. The depth of the embossing pattern 111 on the embossing roller 11 determines the depth of the venting grooves 010. To ensure effective venting without reducing the strength of the core material 01, the depth of the venting grooves 010 is preferably 0.5–2.0 mm, the width is 1.0–4.0 mm, the spacing between adjacent grooves is 10–50 mm, and the ratio of groove depth to core material thickness is controlled between 1:5 and 1:15. For core material 01 with a thickness of 8–12 mm, the groove depth is 1.0–1.5 mm, and the spacing is 20–30 mm. The cross-sectional shape is "V"-shaped or trapezoidal.

[0046] Step 2, Laminating the slab: Adhesive film 02 is attached to the upper and lower sides of the core material 01 using the adhesive film unwinding frame 20, and aluminum alloy panel 03 is attached to the outside of the adhesive films 02 of the upper and lower layers using the aluminum alloy panel unwinding frame 30, thus laminating to form the slab to be composite. The attachment process is carried out at room temperature, and the materials of each layer are held together by slight tension, but are not yet bonded.

[0047] Step 3: Feeding into the hot press laminating machine: The slab to be laminated is fed into the hot press laminating machine 40, where hot press laminating is performed using hot press laminating rollers 41 with axial temperature zones. The hot press laminating rollers 41 have five independent temperature control zones 411 along the axial direction, and the temperature of each independent temperature control zone 411 gradually decreases from the center area to both sides. The hot press laminating temperature (center temperature zone) is 110–150℃, the linear speed is 2–3 m / min, and the linear pressure is 5–15 kg / cm.

[0048] Step 4, Exhausting and sealing during hot pressing: During the hot pressing process, the exhaust groove 010 provides an exhaust channel for the air at the composite interface and the internal gas released by the core material 01, and the independent temperature control zone 411 ensures that the generation and exhaust of gas proceed from the middle to both sides.

[0049] Specifically, as the slab enters the first set of hot press rollers (low-temperature preheating and venting section), the temperature in the center zone is the highest. The adhesive film 02 in the center softens first and is compressed, squeezing the gas to both sides. Due to the lower temperature in the edge zone, the adhesive film 02 at the edge has not yet softened, and the gas escapes smoothly from the side of the slab along the venting groove 010. The slab continues to be conveyed forward into the high-temperature melting and bonding section, where the temperature difference from the center to the edge decreases. The adhesive film 02 gradually melts and completely adheres from the center to the edge, and at this time, residual gas continues to be discharged. In the heat preservation, curing, and shaping section, the adhesive film 02 cures uniformly at a lower temperature difference, and the venting groove 010 remains open until the final stage.

[0050] The adhesive film 02 comprises two functional areas on the surface of the core material 01: a film adhesion area 021 and a hot-press bonding area 022. In the initial stage of hot pressing, i.e., in the film adhesion area 021, the adhesive film 02 only contacts the raised portion of the core material 01 surface, while an open gap exists between it and the bottom and sidewalls of the venting groove 010; this gap serves as the venting channel. In the middle and later stages of hot pressing, i.e., in the hot-press bonding area 022, the adhesive film 02 completely melts and flows into and fills the venting groove 010 under the pressure of the hot-press rollers, sealing the venting channel. Simultaneously, upon cooling, it forms a mechanically interlocking structure, thereby improving the bonding strength.

[0051] Step 5, Cooling and Shaping: After hot pressing and lamination, the sheet material is cooled to room temperature through a slow cooling auxiliary shaping section and subsequent air-cooled or water-cooled roller conveyor. Then, it is trimmed and cut to obtain the finished A2-grade fire-resistant aluminum composite panel. The finished product surface is free of bubbles and delamination, and the peel strength meets the standard requirements.

[0052] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0053] The embodiments have been described above, and such description is not restrictive. The figures shown are only one embodiment, and the actual structure is not limited to this. In short, if a person skilled in the art is inspired by this description and designs a similar structure and embodiment without departing from the inventive spirit, such design should fall within the scope of protection.

Claims

1. A continuous hot-pressing composite molding device for fireproof aluminum composite panels, characterized in that, include: Embossing machine (10) is set on the conveying path of core material (01); The adhesive film unwinding rack (20) is arranged on the rear side of the embossing machine (10) along the conveying direction of the core material (01), and provides adhesive film (02) to the upper and lower surfaces of the core material (01) through the adhesive film unwinding roller (21). An aluminum alloy panel unwinding rack (30) is arranged on the rear side of the adhesive film unwinding rack (20) along the conveying direction, and provides aluminum alloy panels (03) to the upper and lower surfaces of the adhesive film (02) through an aluminum alloy panel unwinding roller (31). The hot press laminating machine (40) is located on the rear side of the aluminum alloy panel unwinding frame (30) along the conveying direction; The embossing machine (10) includes embossing rollers (11) distributed on the upper and lower sides of the core material (01). The surface of the embossing rollers (11) is provided with raised embossing patterns (111), and exhaust grooves (010) are formed on the surface of the core material (01) through the embossing patterns (111). The hot press laminating machine (40) includes hot press laminating rollers (41) distributed on the upper and lower surfaces of the aluminum alloy panel (03). The hot press laminating rollers (41) include multiple independent temperature control zones (411) along the axial direction. The temperature of some of the independent temperature control zones (411) gradually decreases from the center area to both sides, so that the softening and bonding process of the adhesive film (02) proceeds from the center area to both sides. At the same time, the gas generated during the hot pressing process is discharged from the center area to both sides through the embossing patterns (111).

2. The fireproof aluminum composite panel continuous hot-pressing composite molding device according to claim 1, characterized in that: The independent temperature control zone (411) is set to five along the axial direction, and the independent temperature control zone (411) includes a central temperature zone, a transition temperature zone and an edge temperature zone from the middle to both sides. The transition temperature zone includes a symmetrically distributed left transition temperature zone and a right transition temperature zone, and the edge temperature zone includes a symmetrically distributed left edge temperature zone and a right edge temperature zone. The central temperature zone occupies 30-40% of the total width of the roller surface, the transition temperature zone occupies 15-20% of the total width of the roller surface, and the edge temperature zone occupies 15-20% of the total width of the roller surface.

3. The fireproof aluminum composite panel continuous hot-pressing composite molding device according to claim 1, characterized in that: Each of the independent temperature control zones (411) is equipped with an independent heating element and a temperature sensor, and a heat insulation ring is provided between adjacent independent temperature control zones (411). The heating element includes an electric heating tube or a hot oil circulation loop.

4. The fireproof aluminum composite panel continuous hot-pressing composite molding device according to claim 2, characterized in that: The hot-pressing composite roller (41) is configured in multiple groups along the conveying direction, and the multiple groups of hot-pressing composite rollers (41) include at least a low-temperature preheating and exhaust section, a high-temperature melting and bonding section, a heat preservation and curing section, and a slow cooling and auxiliary curing section. In one or more of the low-temperature preheating and exhaust section, the high-temperature melting and bonding section, and the heat preservation and curing section, the temperature of the center temperature zone, the transition temperature zone, and the edge temperature zone gradually decreases, and the temperature difference between the center temperature zone and the edge temperature zone gradually decreases along the conveying direction.

5. The fireproof aluminum composite panel continuous hot-pressing composite molding device according to claim 4, characterized in that: In the low-temperature preheating and exhaust section, the temperature difference between the center temperature zone and the edge temperature zone is set to be controlled at 15~25℃. In the heat preservation, curing and shaping section, the temperature difference between the center temperature zone and the edge temperature zone is set to be controlled at 0~10℃. In the heat preservation, curing and shaping section, the temperature difference between the center temperature zone and the edge temperature zone is set to be controlled at 0~5℃. In the slow cooling and auxiliary shaping section, the hot-pressing composite roller (41) is set to be uniformly heated in the axial direction.

6. The fireproof aluminum composite panel continuous hot-pressing composite molding device according to claim 1, characterized in that: The exhaust grooves (010) provided on the upper and lower bonding surfaces of the core material (01) are staggered along the conveying direction. The exhaust grooves (010) on the upper side and the exhaust grooves (010) on the lower side are staggered by half a cycle. The stagger distance between any two adjacent upper and lower exhaust grooves (010) is half the distance between two adjacent exhaust grooves (010) on the same side.

7. The fireproof aluminum composite panel continuous hot-pressing composite molding device according to claim 1, characterized in that: The exhaust groove (010) has a triangular or trapezoidal cross-section, and the sidewall inclination angle of the exhaust groove (010) is 30~60°.

8. A continuous hot-pressing composite molding method for fireproof aluminum composite panels, characterized in that: The fire-resistant aluminum composite panel continuous hot-pressing composite molding apparatus according to any one of claims 1-7 includes the following steps: Step 1: Pass the cured adhesive film (02) through an embossing machine (10) and use the embossing roller (11) on the embossing machine (10) to press out multiple air venting grooves (010) extending in the width direction of the adhesive film (02) on the upper and lower bonding surfaces of the adhesive film (02). Step 2: Adhesive film (02) is attached to the upper and lower sides of the core material (01) by adhesive film unwinding frame (20), and aluminum alloy panel (03) is attached to the outside of the adhesive film (02) of the upper and lower layers by aluminum alloy panel unwinding frame (30) to form a composite board blank; Step 3: The blank to be composited is fed into the hot press composite machine (40), and hot press composite is performed using the hot press composite roller (41) with axial temperature partitions set in the hot press composite machine (40). The hot press composite roller (41) is set with five independent temperature control zones (411) along the axial direction, and the temperature of some of the independent temperature control zones (411) gradually decreases from the center area to both sides. Step 4: During the hot pressing process, the exhaust groove (010) provides an exhaust channel for the air at the composite interface and the internal gas released by the core material (01), and the independent temperature control zone (411) ensures that the generation and discharge of gas proceed from the middle to both sides. Step 5: After hot pressing and lamination, the sheet material is cooled and shaped to obtain a fireproof aluminum composite panel.

9. The continuous hot-pressing composite molding method for fireproof aluminum composite panels according to claim 8, characterized in that: In step 1, the cross-sectional shape of the exhaust groove (010) is "V" or trapezoidal. In step 4, the temperature of hot pressing composite is 110~150℃ and the linear velocity is 2~3m / min.

10. The continuous hot-pressing composite molding method for fireproof aluminum composite panels according to claim 8, characterized in that: In step 4, the multiple sets of hot-press composite rollers (41) include at least a low-temperature preheating and venting section, a high-temperature melting and bonding section, a heat preservation and curing shaping section, and a slow cooling and auxiliary shaping section. The adhesive film (02) includes a film adhesion area (021) and a hot-press bonding area (022) on the surface of the core material (01). In the film adhesion area (021), there is an inter-venting channel between the adhesive film (02) and the venting groove (010). In the hot-press bonding area (022), the adhesive film (02) melts and fills the venting groove (010) to seal the venting channel.

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