Aluminum-plastic panel production equipment with residual defoaming powder eliminating structure

Abstract

The utility model discloses aluminum-plastic panel production equipment with a residual defoaming powder eliminating structure. The aluminum-plastic panel production equipment comprises an aluminum-plastic compound machine, a plastic forming press, a plastic extruder and a defoaming pool, the defoaming tank is arranged between the plastic forming press and the plastic extruder; the defoaming tank is filled with water; and a material strip extruded by the plastic extruder passes through the water body of the defoaming tank and then is fed into the plastic forming press. According to the utility model, the plastic plate extruded by the plastic forming press is immersed in the water body of the defoaming tank, so that the unreacted quick lime and other defoaming agents fully react with the water under the controlled condition to generate calcium hydroxide, residual particles and reaction byproducts on the surface of the plastic plate are washed and removed after the plastic plate is washed, and the cleanliness of the composite interface of the plastic substrate and the aluminum plate is obviously improved; and after aluminum-plastic compounding, the interlayer bonding strength is improved, and the anti-stripping performance of the aluminum-plastic panel is effectively improved.

Description

Technical Field

[0001] This utility model relates to the technical field of aluminum composite panel production equipment, and in particular to an aluminum composite panel production equipment with a residual defoaming powder elimination structure. Background Technology

[0002] Aluminum composite panels (ACPs) are a type of composite material widely used in building decoration. They are typically made by bonding a plastic substrate and an aluminum plate through a high-temperature lamination process. The production process mainly includes three core steps: melt extrusion of the plastic raw material, surface treatment of the aluminum plate, and aluminum-plastic lamination. During the production of the plastic substrate, the extruder heats and melts the plastic raw material (with added defoamer), then extrudes it into strips. After calendering, the strips are simultaneously fed into the high-temperature pressure roller group of the laminating machine along with the pre-treated aluminum plate for lamination.

[0003] However, plastic raw materials are prone to absorbing moisture during storage and processing, and the internal moisture evaporates upon heating during melt extrusion, causing bubble defects. To address this, the industry commonly uses inorganic defoamers such as quicklime (CaO) to counteract the moisture by reacting with water to form calcium hydroxide. However, due to fluctuations in raw material moisture content and limitations in process control precision, excessive addition of defoamers is common in actual production. Unreacted defoamers remain inside the plastic substrate. After the aluminum composite panel is cut, the exposed residual defoamers react with water vapor in the air, causing secondary hydration and localized volume expansion. This leads to micro-cracks, bulges, and other interface delamination at the panel edges, severely affecting the product's appearance and structural stability. Therefore, further improvements are needed. Utility Model Content

[0004] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes an aluminum composite panel production equipment with a residual defoaming powder elimination structure.

[0005] The technical solution adopted by one embodiment of this utility model to solve its technical problem is: an aluminum-plastic composite board production equipment with a residual defoaming powder elimination structure, including: an aluminum-plastic composite machine, a plastic forming machine, a plastic extruder, and a defoaming tank;

[0006] The aluminum-plastic composite machine, plastic forming machine, and plastic extruder are arranged in sequence; the plastic extruder is equipped with a mixer, which is filled with defoaming agent; the defoaming tank is arranged between the plastic forming machine and the aluminum-plastic composite machine; the defoaming tank is filled with water; the plastic sheet extruded by the plastic forming machine passes through the water in the defoaming tank and is then sent into the aluminum-plastic composite machine.

[0007] Optionally, the downstream section of the defoaming tank is provided with a drying chamber.

[0008] Optionally, the drying chamber is equipped with a heating element and a circulating fan.

[0009] Optionally, the defoaming tank and drying chamber are equipped with several guide rollers.

[0010] Optionally, the defoaming tank is connected to a water circulation mechanism; the defoaming tank has an inlet and an outlet, and the water circulation mechanism includes a circulating water path, a circulating water pump, and a circulating water tank connected to the inlet and outlet.

[0011] Optionally, the defoaming tank is provided with an overflow hole, which is connected to the circulating water tank through an overflow pipe.

[0012] Optionally, the defoaming tank is equipped with a water heating component.

[0013] The beneficial effects of this invention are as follows: When the plastic sheet extruded by the plastic forming machine is immersed in the defoaming tank, unreacted quicklime and other defoaming agents react fully with water under controlled conditions to generate calcium hydroxide. This avoids secondary water absorption and swelling of residual defoaming agents at the cut surface of the aluminum-plastic composite sheet, fundamentally eliminating defects such as interface bulging and micro-cracks, and improving the product's appearance quality and long-term stability. After washing, residual particles and reaction byproducts on the surface of the plastic sheet are washed away, significantly improving the cleanliness of the interface between the plastic substrate and the aluminum plate. This enhances the interlayer bonding strength after aluminum-plastic composite bonding, effectively improving the peel resistance of the aluminum-plastic composite sheet.

[0014] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0015] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0016] Figure 1 This is a schematic diagram of the aluminum composite panel production equipment of this utility model.

[0017] Explanation of key component symbols:

[0018] 10. Aluminum-plastic composite machine; 20. Plastic forming machine; 30. Plastic extruder; 40. Mixer; 50. Defoaming tank; 51. Water inlet; 52. Water outlet; 53. Overflow hole; 54. Water heating component; 60. Drying chamber; 61. Heating element; 62. Circulating fan; 70. Guide roller; 80. Water circulation mechanism; 81. Circulating water circuit; 82. Circulating water pump; 83. Circulating water tank. Detailed Implementation

[0019] This section will describe in detail the specific embodiments of the present utility model. The preferred embodiments of the present utility model are shown in the accompanying drawings. The purpose of the drawings is to supplement the textual description with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present utility model, but they should not be construed as limiting the scope of protection of the present utility model.

[0020] In the description of this utility model, "multiple" means two or more; "greater than," "less than," and "exceeding" are understood to exclude the stated number; "above," "below," and "within" are understood to include the stated number. The use of "first" and "second" in the description is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly specifying the number of indicated technical features or their sequential relationship.

[0021] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model 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 this utility model.

[0022] In this utility model, unless otherwise explicitly defined, the terms "setting," "installing," and "connecting" should be interpreted broadly. For example, they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to a fixed connection, a detachable connection, or an integral molding; they can refer to a mechanical connection; they can refer to the internal connection of two components or the interaction between two components. Those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0023] Example

[0024] Reference Figure 1 The present invention proposes an aluminum-plastic composite board production equipment with a residual defoaming powder elimination structure, comprising: an aluminum-plastic composite machine 10, a plastic forming machine 20, a plastic extruder 30, and a defoaming tank 50.

[0025] An aluminum-plastic composite machine 10, a plastic forming machine 20, and a plastic extruder 30 are arranged in sequence; the plastic extruder 30 is equipped with a mixer 40, which is filled with defoaming agent; a defoaming tank 50 is arranged between the plastic forming machine 20 and the aluminum-plastic composite machine 10; the defoaming tank 50 is filled with water; the plastic sheet extruded by the plastic forming machine 20 passes through the water in the defoaming tank 50 and is then sent into the aluminum-plastic composite machine 10.

[0026] In this invention, the plastic sheet extruded by the plastic forming machine 20 is immersed in the water in the defoaming tank 50, allowing unreacted quicklime and other defoaming agents to fully react with water under controlled conditions to generate calcium hydroxide. This avoids secondary water absorption and swelling of residual defoaming agents at the cut surface of the aluminum-plastic composite sheet, fundamentally eliminating defects such as interface bulging and micro-cracks, and improving the product's appearance quality and long-term stability. After washing, residual particles and reaction byproducts on the surface of the plastic sheet are washed away, significantly improving the cleanliness of the interface between the plastic substrate and the aluminum plate. This enhances the interlayer bonding strength after aluminum-plastic composite bonding, effectively improving the peel resistance of the aluminum-plastic composite sheet.

[0027] Specifically, the water environment of the defoaming tank 50 can perform preliminary cooling and shaping of the high-temperature extruded plastic sheet, reducing thermal stress deformation.

[0028] In this embodiment, a drying chamber 60 is provided in the rear section of the defoaming tank 50. The drying chamber 60 can dry the plastic sheet after it has passed through the defoaming tank 50, so as to avoid the plastic sheet still having residual moisture before it is pressed.

[0029] Specifically, the drying chamber 60 is equipped with a heating element 61 and a circulating fan 62, and adopts a combined heating mode of infrared radiation heating and hot air convection to ensure that the inner and outer layers of the substrate are heated simultaneously, thereby eliminating drying stress.

[0030] In this embodiment, to limit the transmission path of the plastic sheet within the defoaming tank 50 and the drying chamber 60, allowing the material strip to effectively pass through the water in the defoaming tank 50 while maintaining a longer residence time in the drying chamber 60, the defoaming tank 50 and the drying chamber 60 are equipped with several guide rollers 70. The multi-stage adjustable guide roller assembly can adapt to tension control of substrates of different thicknesses, and the dynamic adjustment function of the guide roller spacing ensures that the material strip forms a sinusoidal trajectory in the defoaming tank 50, extending the effective immersion time.

[0031] In this embodiment, the defoaming tank 50 is connected to a water circulation mechanism 80; the defoaming tank 50 has an inlet 51 and an outlet 52, and the water circulation mechanism 80 includes a circulating water path 81, a circulating water pump 82, and a circulating water tank 83 that are connected to the inlet 51 and the outlet 52; the water circulation mechanism 80 can keep the water in a flowing state and enhance the contact reaction with the plastic plate.

[0032] Furthermore, the defoaming tank 50 is equipped with an overflow hole 53, which is connected to the circulating water tank 83 via an overflow pipe. The overflow hole 53 allows for precise control of the liquid level fluctuation in the defoaming tank 50.

[0033] In this embodiment, the defoaming tank 50 is equipped with a water heating component 54. The water heating component 54 can maintain the water bath temperature environment within an optimal reaction temperature range.

[0034] Of course, this utility model is not limited to the above-described embodiments. Those skilled in the art can make equivalent modifications or substitutions without departing from the spirit of this utility model. All such equivalent modifications and substitutions are included within the scope defined by the claims of this application.

Claims

1. A laminated aluminum plate production apparatus having a residual defoaming powder eliminating structure, characterized by, The application relates to an aluminum-plastic composite machine (10), a plastic press forming machine (20), a plastic extruder (30) and a defoaming pool (50). The aluminum-plastic composite machine (10), the plastic press forming machine (20) and the plastic extruder (30) are sequentially arranged; the plastic extruder (30) is provided with a stirrer (40) filled with a defoaming agent; the defoaming pool (50) is arranged between the plastic press forming machine (20) and the aluminum-plastic composite machine (10); the defoaming pool (50) is filled with water; and the plastic plate extruded by the plastic press forming machine (20) passes through the water body of the defoaming pool (50) and is then sent into the aluminum-plastic composite machine (10). The rear section of the defoaming pool (50) is provided with a drying chamber (60).

2. The aluminum-plastic sheet production apparatus having a residual defoaming powder elimination structure according to claim 1, characterized by: The drying chamber (60) is provided with a heating assembly (61) and a circulating fan (62).

3. The aluminum-plastic sheet production apparatus having a residual defoaming powder elimination structure according to claim 2, characterized by: The defoaming pool (50) and the drying chamber (60) are provided with a plurality of guide rollers (70).

4. The aluminum-plastic sheet production apparatus having a residual defoaming powder elimination structure according to claim 2, characterized by: The defoaming pool (50) is connected with a water circulation mechanism (80); the defoaming pool (50) is provided with a water inlet (51) and a water outlet (52), and the water circulation mechanism (80) comprises a circulating water channel (81) in communication with the water inlet (51) and the water outlet (52), a circulating water pump (82) and a circulating water tank (83).

5. The aluminum plastic plate production apparatus having a residual defoaming powder elimination structure according to claim 1, characterized in that: The defoaming pool (50) is provided with an overflow hole (53) connected with the circulating water tank (83) through an overflow pipe.

6. The aluminum-plastic sheet production apparatus having a residual defoaming powder elimination structure according to claim 5, characterized by: The defoaming pool (50) is provided with a water heating assembly (54).

7. The aluminum plastic plate production apparatus having a residual defoaming powder elimination structure according to claim 1, characterized by: ​

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