Edge sealing method for composite board

Abstract

An edge sealing method for a composite board belongs to the technical field of board processing, and comprises the following steps: heating and melting a core material on the side edge of the composite board, or cutting the core material on the side edge of the composite board, and reserving a side edge upper skin layer and a side edge lower skin layer; in the molten state of the side edge upper skin layer and the side edge lower skin layer, a bending device is used for bending the side edge upper skin layer and the side edge lower skin layer towards the inner side in sequence, so that the side edge upper skin layer and the side edge lower skin layer form lap joint or overlap or hemming overlap, and after cooling and shaping, one or more layers of closed side edges are formed; and the closed side edges and the upper and lower skins form a continuous closed structure. The edge of the composite board is sealed, the composite board is protected, the composite board cannot be damaged in the transportation and use process, and the service life of the composite board is prolonged.

Description

Technical Field

[0001] The invention belongs to the technical field of plate processing, and in particular relates to an edge sealing method for a composite plate. Background Art

[0002] like Figure 1 As shown, the composite panel 2 is made of continuous fiber pre-impregnated with resin to form a low-density, high-strength, and high-toughness upper and lower skins B. The space between the upper and lower skins B is filled with a core material A of foam or honeycomb structure. After heat melting and pressing, it is made into a thermoplastic composite panel. It has the advantages of low density, high strength, acid and alkali corrosion resistance, and recyclability. It has achieved the goal of replacing steel with plastic in many scenarios, which is of great significance. However, in some scenarios such as drops and impacts, when the edge of the composite panel is dropped or impacted, the core material A will peel off at the side edge of the skin due to the insufficient strength of the core material A, thereby damaging the composite panel and reducing the service life of the composite panel. Summary of the Invention

[0003] The purpose of the present invention is to solve the problem that the sides of the current composite panels are not sealed, which causes damage to the composite panels and reduces the service life of the composite panels, and to provide a composite panel edge sealing method.

[0004] A method for edge-sealing a composite panel, wherein the composite panel is composed of a core material and upper and lower skins, wherein the core material is foamed or honeycomb-shaped, and the upper and lower skins are made of plastic, CFRTP (continuous fiber reinforced thermoplastic composite material), or metal; the method comprises: Heating and melting the core material on the side of the composite panel, or cutting the core material on the side of the composite panel, leaving the side upper skin layer and the side lower skin layer; When the upper and lower skins are made of plastic or CFRTP, when the upper side skin layer and the lower side skin layer are in a molten state, a bending device is used to bend the upper side skin layer and the lower side skin layer inward in sequence, so that the upper side skin layer and the lower side skin layer form an overlap or overlap or curling overlap. After cooling and shaping, one or more layers of closed side edges are formed, and the closed side edges and the upper and lower skins form a continuous closed structure.

[0005] When the upper and lower skins are made of metal, a bending device is used to bend the upper side skin layer and the lower side skin layer inward in sequence, so that the upper side skin layer and the lower side skin layer are overlapped or curled to form one or more layers of closed side edges, and the closed side edges and the upper and lower skins form a continuous closed structure.

[0006] When the composite panel is a thin panel, the core material on the side is not heated, melted or cut. Instead, the side of the thin panel is directly heated and pressurized to collapse the core material on the side. A bending device is used to sequentially bend the upper skin layer and the lower skin layer on the side inward, so that the upper skin layer and the lower skin layer on the side are overlapped or curled and overlapped. After cooling and shaping, one or more closed sides are formed, and the closed sides and the upper and lower skins form a continuous closed structure.

[0007] The heating temperature for the heating, melting and heating and pressing is 180-260°C.

[0008] The bending device is a slot-shaped die.

[0009] The bending device is a combination of a first bending device, a second bending device, a third bending device, a fourth bending device, a fifth bending device and a sixth bending device.

[0010] A heating device is used to heat and melt the core material on the side of the composite board. The heating head of the heating device is a rectangular bar, and the thickness of the heating head is the same as the thickness of the core material.

[0011] Beneficial effects of the present invention: The present invention seals the edges of the composite board and protects the composite board, thereby preventing the composite board from being damaged during transportation and use, and prolonging the service life of the composite board. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a structural diagram of the composite plate; Figure 2 It is a schematic diagram of the overlapping arc-shaped closed side structure formed by the present invention; Figure 3 It is a schematic diagram of the overlapping planar closed side structure formed by the present invention; Figure 4 It is a schematic diagram of the overlapping closed side structure formed by the present invention; Figure 5 Schematic diagram of the closed side structure with overlapping curling edges formed by the present invention; Figure 6 This is a diagram of the closed side method for forming an overlap: Figure 7 This is a diagram of the closed side method of forming the overlapping curling edge. Figure 1 ; Figure 8 This is a diagram of the closed side method of forming the overlapping curling edge. Figure 2 ; Figure 9 This is a diagram of the closed side method of forming the overlapping curling edge. Figure 3 . DETAILED DESCRIPTION

[0013] like Figures 2 to 9 As shown, a composite panel edge sealing method is described, wherein the composite panel 2 is composed of a core material A and upper and lower skins B, wherein the core material A is foam or honeycomb, and the upper and lower skins B are made of plastic or CFRTP (continuous fiber reinforced thermoplastic composite material) or metal; the method is: The core material A on the side of the composite panel 2 is heated and melted, or the core material A on the side of the composite panel is cut, leaving the upper skin layer B1 and the lower skin layer B2 on the side; When the upper and lower skins B are made of plastic or CFRTP, in the molten state of the upper side skin layer B1 and the lower side skin layer B2, a bending device is used to bend the upper side skin layer B1 and the lower side skin layer B2 inward in sequence, so that the upper side skin layer B1 and the lower side skin layer B2 are formed as follows: Figure 2 and Figure 3 overlap as shown, or Figure 4 The overlap shown, or Figure 5 The curling edges shown are overlapped and, after cooling and shaping, form one or more layers of closed side edges C, which form a continuous closed structure with the upper and lower skins B.

[0014] When the upper and lower skins B are made of metal, a bending device is used to bend the upper side skin layer B1 and the lower side skin layer B2 inward in sequence, so that the upper side skin layer B1 and the lower side skin layer B2 are formed as follows: Figure 2 and Figure 3 overlap as shown, or Figure 4 The overlap shown, or Figure 5 The curled edges shown overlap to form one or more layers of closed side edges C, which form a continuous closed structure with the upper and lower skins B.

[0015] When the composite plate is a thin plate, the core material A on the side is not heated, melted or cut. The side of the thin plate is directly heated and pressurized to collapse the core material A on the side. The upper skin layer B1 and the lower skin layer B2 on the side are bent inward in sequence using a bending device to form the upper skin layer B1 and the lower skin layer B2 as shown in FIG. Figure 2 and Figure 3 overlap as shown, or Figure 4 The overlap shown, or Figure 5 The curling edges shown are overlapped and, after cooling and shaping, form one or more layers of closed side edges C, which form a continuous closed structure with the upper and lower skins B.

[0016] The heating temperature for the heating, melting and heating and pressing is 180-260°C.

[0017] like Figure 6 As shown, the formation Figure 2 and Figure 3The closed side C method of the overlap shown is: The bending device is a slot die 1. The slot die 1 is heated to 180-260°C. The composite panel 2 is pushed toward the slot die 1, causing the core material A on the side of the composite panel 2 to melt. The core material A melts and collapses due to the heat, and the upper skin layer B1 and the lower skin layer B2 on the side are bent and deformed toward the core layer. Force is gradually applied to fill the slot of the slot die 1, so that the upper skin layer B1 and the lower skin layer B2 on the side are joined. After joining, the composite panel 2 is moved to a cooling die to cool and shape the side, and finally the edge is sealed. Each side of the composite panel 2 is processed in sequence to form a closed side. For arc corners, curved edges, or right-angled edges, the slot die 1 is processed into the corresponding arc, curve, or right angle.

[0018] The slot-shaped mold 1 is heated by an electric heating rod, thermal oil, infrared radiation, or other heating methods.

[0019] like Figure 7 、 Figure 8 and Figure 9 As shown, the formation Figure 5 The method of closing the side C with the hemmed overlap shown is: 1) The heating head 31 of the heating device 3 is a rectangular strip. The thickness of the heating head 31 is the same as the thickness of the core material A. The heating head 31 of the heating device 3 is pushed toward the core material A on the side of the composite panel 2 to melt the core material A on the side, exposing the upper skin layer B1 and the lower skin layer B2 on the side. Then, the first bending device 4 is used to roll the upper skin layer B1 on the side downward into an arc shape. Then, the second bending device 5 is used to push the arc-shaped upper skin layer B1 into overlapping sheets. Then, the third bending device is used to Device 6 bends the side lower skin layer B2 upward into an oblique edge, and then uses the fourth bending device 7 to bend the oblique side lower skin layer B2 inward into a vertical shape, and then uses the fifth bending device 8 to bend the side lower skin layer B2 higher than the top surface of the composite plate 2 toward the top surface of the composite plate 2 into an oblique edge, and then uses the sixth bending device 9 to press the oblique side lower skin layer B2 to the top surface of the composite plate 2. At this point, a closed side C with overlapping curling edges is formed. The side edges of the composite plate 2 are operated in turn to form closed side edges.

[0020] Formed as Figure 4 In the method of overlapping closed side C shown, the folding method of the side upper skin layer B1 is the same as the folding method of the side lower skin layer B2, the difference is that the length of the side upper skin layer B1 and the side lower skin layer B2 is the same as the thickness of the composite panel 2, and there is no step of pressing the side lower skin layer B2 onto the top surface of the composite panel 2.

Claims

1. A method for edge-sealing a composite panel, wherein the composite panel is composed of a core material (A) and upper and lower skins (B), wherein the core material (A) is foam or honeycomb, and the upper and lower skins (B) are made of plastic or (C) FRTP or metal; characterized in that: The method is: Heating and melting the core material (A) on the side of the composite panel (2), or cutting the core material (A) on the side of the composite panel (2), leaving the side upper skin layer (B1) and the side lower skin layer (B2); When the upper and lower skins (B) are made of plastic or (C) FRTP, the upper side skin layer (B1) and the lower side skin layer (B2) are bent inward in sequence using a bending device while the upper side skin layer (B1) and the lower side skin layer (B2) are in a molten state, so that the upper side skin layer (B1) and the lower side skin layer (B2) are overlapped or curled, and after cooling and shaping, one or more layers of closed side (C) are formed, and the closed side (C) and the upper and lower skins (B) form a continuous closed structure; When the upper and lower skins (B) are made of metal, a bending device is used to bend the upper side skin layer (B1) and the lower side skin layer (B2) inward in sequence, so that the upper side skin layer (B1) and the lower side skin layer (B2) are overlapped or curled to form one or more layers of closed side (C), and the closed side (C) and the upper and lower skins (B) form a continuous closed structure.

2. The edge sealing method of a composite panel according to claim 1, characterized in that: When the composite plate is a thin plate, the core material (A) on the side is not heated, melted or cut. Instead, the side of the thin plate is directly heated and pressurized to cause the core material (A) on the side to collapse. A bending device is used to bend the upper skin layer (B1) and the lower skin layer (B2) on the side inward in sequence, so that the upper skin layer (B1) and the lower skin layer (B2) on the side are overlapped or curled and overlapped. After cooling and shaping, one or more layers of closed side (C) are formed, and the closed side (C) and the upper and lower skins (B) form a continuous closed structure.

3. The edge sealing method of a composite panel according to claim 1, characterized in that: The heating temperature for the heating, melting and heating and pressing is 180-260°C.

4. The edge sealing method of a composite panel according to claim 1, characterized in that: The bending device is a slot-shaped die (1).

5. The edge sealing method of a composite panel according to claim 1, characterized in that: The bending device is a combination of a first bending device (4), a second bending device (5), a third bending device (6), a fourth bending device (7), a fifth bending device (8) and a sixth bending device (9).

6. The edge sealing method of a composite panel according to claim 1, characterized in that: A heating device (3) is used to heat and melt the core material (A) on the side of the composite plate (2). The heating head (31) of the heating device (3) is a rectangular bar, and the thickness of the heating head (31) is the same as the thickness of the core material (A).

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