Production line of foamed aluminum sandwich panel

Abstract

The utility model discloses a production line of a foamed aluminum sandwich panel. The production line comprises a pinch roll, a roller mill, a purging device, a gluing machine, a positioning and stacking roller way, a roller way heating furnace, a rolling mill, a curing oven, a splitting machine and a conveying roller way which are sequentially arranged along the production flow direction. The roller mill and the purging device are used for pretreating the bonding surface of a base material plate; the gluing machine is used for uniformly gluing; the positioning and stacking roller bed is matched with the stacking equipment to complete the stacking of the base material plate and a foamed aluminum plate; the roller bed heating furnace and the rolling mill are used for heating and compacting a sandwich plate; according to the utility model, through mechanical operation of pretreatment, gluing, bonding, compaction and curing procedures of the foam board, the bonding strength is higher, the product quality is better, the process stability is better, and the production efficiency is higher.

Description

Technical Field

[0001] This utility model belongs to the field of metal composite panel production technology, and relates to a production line for aluminum foam sandwich panels. Background Technology

[0002] Aluminum foam sandwich panels are a sandwich structure material consisting of an outer layer of dense sheet material and a core layer of aluminum foam. Due to their lightweight, high strength, and excellent thermal insulation, sound insulation, and fire resistance, they show broad application prospects in transportation, aerospace, and construction. With the increasing demand for high-performance materials in modern industry, the research on the preparation technology and the improvement of production equipment for aluminum foam sandwich panels, as a new type of composite material, have become a key focus of the industry. However, current preparation methods and technologies still have certain limitations and cannot fully meet the demands of large-scale, efficient, and high-quality production.

[0003] In existing technologies, the preparation methods of aluminum foam sandwich panels can be mainly divided into two categories. The first method involves adding aluminum foam powder into a metal mold with a specific cavity, followed by direct foaming. During the foaming process, the molten foam is tightly bonded to the matrix cavity, and after cooling, it is cut to form a aluminum foam component with a sandwich structure. A significant advantage of this method is the tighter connection between the molten aluminum foam and the matrix, resulting in higher overall component strength. However, because the foaming process takes place inside a closed cavity, the process is strictly limited by the cavity structure, significantly increasing the complexity of the foaming process. The formation, distribution, and final cell morphology control of bubbles during foaming become technical challenges, directly affecting the quality of the sandwich panel. Currently, the industry still faces many challenges in precisely controlling the cell morphology, macrostructure, and enhancing the stability of the matrix structure in sandwich panels. Furthermore, this method is more suitable for producing small components, with a discrete production process and low production efficiency, failing to meet the needs of large-scale industrial production. Against the backdrop of increasing market demand for aluminum foam sandwich panels, the limitations of this method are becoming increasingly apparent.

[0004] The second method involves first preparing high-quality aluminum foam boards, and then forming a sandwich structure through subsequent connection processes with the substrate. Connection methods typically include welding, riveting, and gluing, with gluing being the most widely used due to its simplicity and ease of large-scale production. In the gluing method for preparing aluminum foam sandwich panels, separate aluminum foam boards and substrate boards are first prepared, and then bonded together using an adhesive coating process to ultimately form the sandwich structure. This method avoids the complexity of cavity foaming and can improve production efficiency to some extent. However, the gluing method also has some technical drawbacks. For example, in actual production, the cleanliness of the connecting surfaces is often difficult to guarantee, and residual impurities or oil stains can lead to a decline in the quality of the bonding interface. Furthermore, manual operation remains the norm on many production lines, and the control of the amount of adhesive applied lacks a unified standard, easily resulting in uneven or excessive / insufficient application. These factors all affect the bonding strength between the aluminum foam board and the substrate board, thereby reducing the overall performance and reliability of the product.

[0005] In summary, existing foamed aluminum sandwich panel manufacturing technologies all have room for improvement in terms of production efficiency, product quality stability, and large-scale production capacity. While the first type of method produces high-quality products, its complex and inefficient production process makes it difficult to meet industrial demands. The second type of method, although simple to operate, faces bottlenecks in controlling the bonding quality. Therefore, developing a production line capable of efficient, continuous production while ensuring product quality is crucial to meeting the demands of modern industry for high-performance foamed aluminum sandwich panels. Utility Model Content

[0006] In view of this, the purpose of this utility model is to solve the above problems and provide a production line for aluminum foam sandwich panels.

[0007] To achieve the above objectives, this utility model provides the following technical solution:

[0008] A production line for aluminum foam sandwich panels includes a pinch roller, a roller mill, a blowing device, a glue applicator, a positioning and stacking roller conveyor, a roller conveyor heating furnace, a rolling mill, a curing furnace, a slitting machine, and a conveyor roller conveyor arranged sequentially along the production flow direction.

[0009] The roller mill and blowing device are used to pre-treat the bonding surface of the substrate board; the glue applicator is used to apply glue to the bonding surface of the substrate board; a stacking device is provided above the positioning and stacking roller conveyor for stacking the substrate board and the aluminum foam board; the roller conveyor heating furnace and rolling mill are used to heat and compact the aluminum foam sandwich panel; the curing furnace is used to cure the aluminum foam sandwich panel; the slitting machine is used to cut the aluminum foam sandwich panel to length and convey it through the conveyor roller conveyor.

[0010] Furthermore, a waste collection funnel is provided below the slitting machine.

[0011] Furthermore, the width of the aluminum foam sandwich panel is ≤5000mm.

[0012] Furthermore, the substrate can be a metal plate or a plastic plate.

[0013] The beneficial effects of this utility model are as follows:

[0014] (1) This utility model can realize continuous production of foam aluminum sandwich panels, with large production specifications, high production efficiency, and full-line automated control, resulting in more stable production quality.

[0015] (2) By grinding and blowing the substrate plate, this utility model increases the bonding area between the core layer aluminum foam and the substrate plate, resulting in higher bonding strength.

[0016] (3) This utility model heats and rolls the foam aluminum sandwich panel online, and rolls it under hot conditions, which makes the bonding strength between the foam aluminum panel and the base plate higher and the product quality better.

[0017] Other advantages, objectives, and features of this invention will be set forth in part in the description which follows, and in part will be apparent to those skilled in the art from the following examination and study, or may be learned from practice of this invention. The objectives and other advantages of this invention can be realized and obtained through the following description. Attached Figure Description

[0018] To make the objectives, technical solutions, and advantages of this utility model clearer, the preferred embodiments of this utility model will be described in detail below with reference to the accompanying drawings, wherein:

[0019] Figure 1 This is a schematic diagram of the production line for the aluminum foam sandwich panel in this embodiment of the present invention.

[0020] Figure 2 This is a schematic diagram of the aluminum foam sandwich panel in an embodiment of this utility model.

[0021] Reference numerals in the attached drawings: 1-Pinch roller; 2-Roll mill; 3-Blowing device; 4-Glue applicator; 5-Positioning and stacking roller conveyor; 6-Stacking equipment; 7-Roller conveyor heating furnace; 8-Rolling mill; 9-Curing furnace; 10-Slitting machine; 11-Transfer roller conveyor; 12-Waste collection funnel. Detailed Implementation

[0022] The following specific examples illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. This utility model can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this utility model. It should be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of this utility model. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0023] The accompanying drawings are for illustrative purposes only and are schematic diagrams, not actual pictures. They should not be construed as limiting the present invention. To better illustrate the embodiments of the present invention, some parts in the drawings may be omitted, enlarged, or reduced, and do not represent the actual product dimensions. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings.

[0024] In the accompanying drawings of this utility model, the same or similar reference numerals correspond to the same or similar components. In the description of this utility model, it should be understood that if terms such as "upper," "lower," "left," "right," "front," and "rear" 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 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, the terms used to describe positional relationships in the drawings are only for illustrative purposes and should not be construed as limiting this utility model. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0025] Please see Figures 1-2 This is a production line for aluminum foam sandwich panels, comprising a pinch roller 1, a roller mill 2, a blowing device 3, a glue applicator 4, a positioning and stacking roller conveyor 5, a stacking device 6, a roller conveyor heating furnace 7, a rolling mill 8, a curing oven 9, a slitting machine 10, a conveyor roller conveyor 11, and a waste collection funnel 12. The positioning and stacking roller conveyor 5 is located after the glue applicator 4; the online roller mill 2 and blowing device 3 are located before the positioning and stacking roller conveyor 5 to pre-treat the bonding surface of the substrate board; glue is applied online by the glue applicator 4; the roller conveyor heating furnace 7 and the online rolling mill 8 are located after the positioning and stacking roller conveyor 5 to compact the aluminum foam sandwich panels; an offline or online curing oven 9 is located after the rolling mill 8. A stacking device for stacking the substrate board and aluminum foam board is located above the positioning and stacking roller conveyor 5.

[0026] The production line is used to manufacture aluminum foam sandwich panels, including the following steps:

[0027] Step 1: Place a substrate board of a certain size above the roller conveyor, aligning it with the center line of the roller conveyor.

[0028] Step 2: The substrate board is clamped into the roller mill 2 by the clamping roller 1 to pre-treat the bonding surface of the substrate board;

[0029] Step 3: The blowing device 3 blows and cleans the surface of the pretreated substrate board;

[0030] Step 4: The cleaned substrate board enters the glue applicator 4 to apply glue to the bonding surface;

[0031] Step 5: After applying the adhesive, the substrate board is clamped by the stacking device and placed on the positioning and stacking roller conveyor 5, and then stacked in the order of substrate board, aluminum foam board, and substrate board.

[0032] Step 6: After placing the foamed aluminum sandwich panel into the roller heating furnace 7, it is sent to the rolling mill 8 for light rolling.

[0033] Step 7: The rolled and pressed aluminum foam sandwich panel is sent to the subsequent curing oven 9 for curing, and then cut into the required size by the slitting machine 10.

[0034] The width of the aluminum foam sandwich panel is ≤5000mm. The surface roughness of the substrate bonding surface after pretreatment is Ra5~200. The temperature of the aluminum foam sandwich panel before rolling is 30~300℃. The reduction of the stacked and positioned aluminum foam sandwich panels is 0.1%~10%. The substrate can be a metal plate or a plastic plate.

[0035] Example 1

[0036] Please see Figure 2 The selected foam core B is pure aluminum, the substrate A is aluminum alloy 6061, and the dimensions of the board are 3000mm long and 1800mm wide. The substrate board is placed above the center line of the roller conveyor. The substrate board is clamped by the pinch roller 1 and fed into the roller mill 2 for pretreatment of the bonding surface. The surface roughness of the pretreated substrate board bonding surface is Ra50. The blowing device 3 cleans the pretreated substrate board surface. The cleaned substrate board enters the glue applicator 4 to apply glue to the bonding surface. After glue application, the substrate board is clamped by the stacking device and placed on the positioning and stacking roller conveyor 5, and stacked in the order of substrate board, aluminum foam board, and substrate board. The placed aluminum foam sandwich panels enter the roller conveyor heating furnace 7 and are then fed into the rolling mill 8 for light rolling. Before rolling, the temperature of the aluminum foam sandwich panels is 200℃, and the reduction of the stacked positioning aluminum foam sandwich panels is 1%. The rolled and pressed aluminum foam sandwich panels are then sent to the subsequent curing furnace 9 for curing at 100℃, and then cut into the required size by the length-cutting machine 10. The obtained aluminum foam sandwich panels have high bonding strength and good performance.

[0037] Example 2

[0038] Please see Figure 2 The selected foam core B is made of aluminum alloy 1100, and the substrate A is a PP plastic board with a length of 2000mm and a width of 1200mm. The substrate board is placed above the center line of the roller conveyor. The substrate board is clamped by the pinch roller 1 and fed into the roller mill 2 for pretreatment of the bonding surface. The surface roughness of the pretreated substrate board bonding surface is Ra30. The blowing device 3 cleans the pretreated substrate board surface. The cleaned substrate board enters the glue applicator 4 to apply glue to the bonding surface. After glue application, the substrate board is clamped by the stacking device and placed on the positioning and stacking roller conveyor 5, and stacked in the order of substrate board, aluminum foam board, and substrate board. The placed aluminum foam sandwich panels enter the roller conveyor heating furnace 7 and are then fed into the rolling mill 8 for light rolling. Before rolling, the temperature of the aluminum foam sandwich panels is 100℃, and the reduction of the stacked positioning aluminum foam sandwich panels is 2%. The rolled and pressed aluminum foam sandwich panels are then sent to the subsequent curing furnace 9 for curing at 60℃, and then cut into the required size by the length-cutting machine 10. The obtained aluminum foam sandwich panels have high bonding strength and good performance.

[0039] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of this technical solution, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A production line for aluminum foam sandwich panels, characterized in that: It includes pinch rollers, roller mills, blowing devices, glue applicators, positioning and stacking roller conveyors, roller conveyor heating furnaces, rolling mills, curing furnaces, slitting machines, and conveyor roller conveyors arranged sequentially along the production flow; The roller mill and blowing device are used to pre-treat the bonding surface of the substrate board; the glue applicator is used to apply glue to the bonding surface of the substrate board; a stacking device is provided above the positioning and stacking roller conveyor for stacking the substrate board and the aluminum foam board; the roller conveyor heating furnace and rolling mill are used to heat and compact the aluminum foam sandwich panel; the curing furnace is used to cure the aluminum foam sandwich panel; the slitting machine is used to cut the aluminum foam sandwich panel to length and convey it through the conveyor roller conveyor.

2. The production line for aluminum foam sandwich panels according to claim 1, characterized in that: The slitting machine is equipped with a waste collection funnel at its bottom.

3. The production line for aluminum foam sandwich panels according to claim 1, characterized in that: The width of the aluminum foam sandwich panel is ≤5000mm.

4. The production line for aluminum foam sandwich panels according to claim 1, characterized in that: The substrate is a metal plate or a plastic plate.

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