An edge banding device and method for a board having a recessed edge

Abstract

This invention relates to the field of sheet metal processing equipment technology, and discloses an edge-sealing device and method for the side of a sheet metal with a groove. The device includes a frame, a pre-pressing device, a post-pressing device, and a softening device mounted on the frame, with the softening device positioned between the pre-pressing device and the post-pressing device. The method includes bonding the middle and lower parts of the sheet metal side edge with an edge-sealing tape, heating and softening the upper bending line of the edge-sealing tape, and bonding the upper part of the sheet metal side edge with the edge-sealing tape. This invention enables edge-sealing of the side of a sheet metal with a groove, improving production efficiency, and achieving a high degree of adhesion between the edge-sealing tape and the sheet metal side edge, resulting in a good edge-sealing effect.

Description

Technical Field

[0001] This invention relates to the field of sheet metal processing equipment technology, and specifically to an edge sealing device and method for a sheet metal with a groove. Background Technology

[0002] The sides of boards are generally sealed with edge banding tape. After the edge banding tape is glued, it adheres to the side of the board. When the side of the board is a straight edge, the bonding wheel in a common edge banding machine can complete the bonding work between the side of the board and the edge banding tape. However, when edge banding boards with a groove around the outside of the side, the existing edge banding machine cannot perform the edge banding. The edge banding work is generally carried out manually, which has the disadvantages of slow production efficiency and inconsistent edge banding quality. Summary of the Invention

[0003] To address the aforementioned problems, this invention provides an edge-sealing device and method for the side of a board with a groove, which can perform edge-sealing work on the side of a board with a groove, improving production efficiency, and the edge-sealing tape has a high degree of fit with the side of the board, resulting in a good edge-sealing effect.

[0004] The technical solution of this invention to solve the technical problem is as follows:

[0005] A sealing device for the side of a plate with a groove includes a frame, a pre-pressing device, a post-pressing device, and a softening device disposed on the frame, wherein the softening device is disposed between the pre-pressing device and the post-pressing device.

[0006] The first pressing device includes a first middle pressing plate and a first lower pressing plate distributed vertically, and a heating device for heating the first middle pressing plate. The front side of the first middle pressing plate is located in front of the front side of the first lower pressing plate, and the front side of the first middle pressing plate gradually tilts forward from right to left.

[0007] The rear pressing device includes a second upper pressing plate, a second middle pressing plate, and a second lower pressing plate distributed in an upper, middle, and lower manner. The front side of the second middle pressing plate is located in front of the front side of the second upper pressing plate and the second lower pressing plate.

[0008] The softening device includes a third middle pressure plate and a heating element. The heating side of the heating element is located on the upper side of the third middle pressure plate, and there is a gap between the third middle pressure plate and the heating side of the heating element for the sealing strip to pass through.

[0009] Furthermore, two pre-pressing devices are arranged side by side in the left-right direction, with a gap between the two pre-pressing devices, and the inclination angle of the front side of the first middle pressing plate is greater than three degrees and less than fifteen degrees.

[0010] Furthermore, multiple rear pressing devices are arranged side by side in the left-right direction, with intervals between adjacent rear pressing devices. The front side of the upper side of the second upper pressing plate of the rightmost rear pressing device is an inclined surface that gradually slopes upward from right to left.

[0011] Furthermore, the pre-pressing device, the post-pressing device, and the softening device are slidably mounted on the frame in the vertical direction, and springs or tension springs are provided between them and the frame to give them an upward or downward elastic force.

[0012] Furthermore, springs are provided between the pre-pressing device and the rear-pressing device and the frame, giving them a downward elastic force, and a tension spring is provided between the softening device and the frame, giving it an upward elastic force.

[0013] Furthermore, the rightmost end of the front side of the first middle top pressure plate, the first lower top pressure plate, the second upper top pressure plate, the second middle top pressure plate, the second lower top pressure plate, and the third middle top pressure plate are all provided with a first chamfer, which gradually tilts backward from left to right. The right end of the heating side of the heating element is provided with a second chamfer, which gradually tilts upward from left to right.

[0014] Furthermore, the softening device also includes a third lower top pressure plate, which is disposed below the third middle top pressure plate, and the front side of the third middle top pressure plate is disposed in front of the front side of the third lower top pressure plate.

[0015] A method for sealing the edge of a sheet metal panel with a groove includes the following steps:

[0016] Step 1: Adhere the edge banding to the middle and lower parts of the side of the board: Align the bottom of the edge banding coated with glue with the bottom of the side of the board, move the board and the edge banding, and during the movement, the middle and lower parts of the board and the edge banding are adhered to the first pressing component. The shape of the first pressing component matches the groove in the middle of the side of the board and the concave and convex parts in the lower part of the side. Along the direction of board movement, the middle protrusion of the pressing component gradually tilts into the groove in the middle of the side of the board, pressing the edge banding located in the groove in the middle of the side of the board and the lower part of the side of the board to adhere to the side of the board. During the movement, the middle part of the edge banding gradually adheres to the groove in the middle of the side of the board. During this process, the middle protrusion of the pressing component heats and softens the edge banding.

[0017] The second step is to heat and soften the upper bend line of the edge banding: move the board and the edge banding, and heat and soften the upper bend line of the edge banding during the movement; specifically, move the board and the edge banding so that the upper bend line of the edge banding comes into contact with or approaches the heating plate during the movement, and heat and soften the upper bend line.

[0018] The third step is to attach the upper part of the side of the board to the edge banding: move the board and the edge banding so that the upper part of the edge banding contacts the second pressing member, which causes the upper part of the edge banding to gradually bend upward during the movement.

[0019] Furthermore, it also includes:

[0020] Step 4: Fully fit the side of the board with the edge banding: Move the board and the edge banding so that the side of the board fits with the third pressing component during the movement. The shape of the third pressing component matches the concave and convex shape of the side of the board.

[0021] Furthermore, the first pressing member has a fracture crack at the middle of its position along the direction of plate movement.

[0022] Furthermore, in the second step, the width of the heated and softened bend line is 0.7-1.3 times the thickness of the edge banding tape.

[0023] The effects described in the invention are merely those of the embodiments, and not all the effects of the invention. One of the above technical solutions has the following advantages or beneficial effects:

[0024] 1. This invention uses a first lower pressing plate in a pressing device to press the lower part of the side of the board, causing the lower part of the side of the board to be pressed and bonded to the lower part of the edge banding. During the continuous movement of the board, a first middle pressing plate gradually presses the central recess of the board, causing the central part of the edge banding to be pressed and bonded to the central recess of the side of the board. Then, a second upper pressing plate in a rear pressing device presses the upper part of the side of the board, causing the upper part of the side of the board to be pressed and bonded to the upper part of the edge banding. This completes the edge banding of the grooved side of the board. During this process, the heated first middle pressing plate transfers heat to the central part of the edge banding, softening the edge banding and making it easier to bend into the central recess of the side of the board. On the one hand, heating the edge banding tape increases the melting rate of the adhesive, improving the bonding effect. The heating element in the softening device is positioned to align with the bend line of the edge banding tape during its upper bending. As the board and edge banding tape move, the heating element heats and softens the bend line, making the upper bending of the edge banding tape easier and more seamless. This also increases the melting rate of the adhesive, enhancing the bonding effect. Furthermore, the second and lower pressure plates of the rear pressure device align with the central groove and lower part of the board, facilitating alignment between the rear pressure device and the board. They also apply additional pressure to the central and lower parts of the board, further improving the adhesion of the edge banding tape to these areas. The edge banding of the grooved sides of the board can be completed simply by moving the board left and right, greatly improving automation, speed, and the adhesion between the edge banding tape and the board side, thus enhancing the overall edge banding effect.

[0025] 2. Due to defects in the cutting of the board side, there may be protruding parts on the side of the board. If only one complete pre-pressing device is used, only the protruding parts can contact and press against the first middle and first lower pressing plates, resulting in insufficient pressing pressure on other parts of the board against the first middle and first lower pressing plates, thus leading to poor edge banding adhesion. If the pre-pressing device is divided into more than two, the board edge banding has to pass through multiple gaps. During the movement of the board and edge banding after passing through the gaps, the pressure from the next pre-pressing device will cause wrinkles in the edge banding. The wrinkles produced by more than two pre-pressing devices are obvious and numerous, which does not meet the quality inspection standards. This invention sets two pre-pressing devices. Compared with setting one complete pre-pressing device or setting two or more pre-pressing devices, it does not produce obvious wrinkles, meets the quality inspection standards, and avoids the problem of poor edge banding adhesion caused by insufficient pressing pressure between the board side and the pre-pressing device.

[0026] 3. In this invention, the upper side of the second upper pressure plate of the first rear pressure device that contacts the edge banding is set as an inclined surface, which can gradually bend the upper part of the edge banding upward, and finally realize that the upper part of the edge banding changes from a near horizontal angle to a vertical state, thereby fitting with the vertical edge of the upper side of the edge banding; and through multiple rear pressure devices, the upper, middle and lower parts of the side of the board can be pressured multiple times, so that the edge banding and the side of the board can fit better.

[0027] 4. The first and second pressing devices have upward or downward elastic force, which can make the first and second pressing plates in the first and second pressing devices exert pressure on the upper and lower sides of the groove on the side of the board, thus making the edge banding strip have a strong bonding force with the upper and lower sides of the groove. On the other hand, the first pressing device, the second pressing device, and the softening device slide up and down and have elastic force, which can make the side of the board aligned with the first pressing device, the second pressing device, and the softening device with a buffer floating space.

[0028] 5. By setting the first chamfer as a guide for the board, the board is aligned and tightly fitted with the first pressing device, the second pressing device, and the softening device. The second chamfer allows the edge banding to smoothly enter the gap between the third middle pressing plate 51 and the heating plate 52 during the movement.

[0029] 6. The method of the present invention first adheres the bottom of the side of the board to the bottom of the edge banding, and then gradually applies the middle groove portion to the edge banding through the protruding part of the first pressing member. During this process, the middle area of ​​the edge banding is heated and softened, making it easier and more flexible to bend into the same shape as the groove on the side of the board. The bending line of the upper part of the edge banding is locally heated and softened, making it easier and more flexible to bend the upper part of the edge banding upward. After the bending line is heated and softened, the upper part of the edge banding is pressed and adhered to the upper part of the side of the board by the second pressing member. By reasonably breaking down the edge banding application process and adding heating and softening in special steps and special positions, the edge banding effect on the side of the board with a groove shape is improved.

[0030] 7. After completing steps one through three of the edge banding application process, a third pressing device simultaneously applies pressure from the top, middle, and bottom to the sides of the board, reinforcing the bond between the edge banding and the board, thereby improving edge banding stability. This also allows for further pressing to smooth out any slight wrinkles or unevenness in the edge banding. The inclusion of cracks ensures that the applied edge banding will not produce noticeable wrinkles, meeting quality inspection standards, while also preventing poor bonding caused by insufficient pressure from the initial pressing device on the board sides. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of the overall three-dimensional structure of the present invention;

[0032] Figure 2 for Figure 1 Enlarged view of section A;

[0033] Figure 3 for Figure 1 Enlarged view of section B;

[0034] Figure 4 A three-dimensional view of a pre-pressing device;

[0035] Figure 5 A three-dimensional view of the three rear pressing devices;

[0036] Figure 6 A perspective view of the softening device;

[0037] Figure 7 A structural diagram showing the state of the sheet metal being processed by the initial pressing device;

[0038] Figure 8 A structural diagram showing the state of the sheet metal being processed for the softening device;

[0039] Figure 9 A structural diagram showing the state of the sheet metal being processed for the rear pressing device;

[0040] In the diagram, 1 is the sheet material, 2 is the edge banding, 3 is the first pressing device, 31 is the first middle pressing plate, 32 is the first lower pressing plate, 33 is the heating device, 4 is the rear pressing device, 41 is the second upper pressing plate, 42 is the second middle pressing plate, 43 is the second lower pressing plate, 5 is the softening device, 51 is the third middle pressing plate, 52 is the heating element, 521 is the heating side, 522 is the second chamfer, 53 is the third lower pressing plate, 6 is the frame, 7 is the first chamfer, 81 is the heating rod, 82 is the heat-conducting metal block, 83 is the second heat-conducting metal block, 91 is the spring, and 92 is the tension spring. Detailed Implementation

[0041] To clearly illustrate the technical features of this solution, the invention will be described in detail below through specific embodiments and in conjunction with the accompanying drawings. The following disclosure provides many different embodiments or examples for implementing different structures of the invention. To simplify the disclosure, components and arrangements of specific examples are described below. Furthermore, reference numerals and / or letters may be repeated in different examples. This repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed. It should be noted that the components illustrated in the drawings are not necessarily drawn to scale. Descriptions of well-known components, processing techniques, and processes are omitted to avoid unnecessarily limiting the invention.

[0042] Example 1

[0043] like Figure 1-9 As shown, a sealing device for the side of a plate with a groove includes a frame 6, a pre-pressing device 3, a post-pressing device 4, and a softening device 5 disposed on the frame 6. The softening device 5 is disposed between the pre-pressing device and the post-pressing device. The pre-pressing device 3, the softening device 5, and the post-pressing device 4 are arranged sequentially along the direction of movement of the plate 1, i.e., from right to left.

[0044] The aforementioned pressing device 3 includes a first intermediate pressing plate 31, a first lower pressing plate 32, and a heating device 33 for heating the first intermediate pressing plate 31. Specifically, the heating device 33 is a heating device in the prior art. In this embodiment, a heating rod is inserted into a heat-conducting metal block. The heating rod 81 generates heat, which is then conducted to the first intermediate pressing plate 31 by the heat-conducting metal block 82. The front side of the first intermediate pressing plate 31 is located in front of the front side of the first lower pressing plate 32. The front side of plate 1 gradually tilts forward from right to left, that is, the front side of the first middle top pressure plate gradually tilts towards plate 1 as plate 1 moves. The first middle top pressure plate 31 and the first lower top pressure plate 32 are respectively in concave-convex fit with the middle and lower parts of the side of the plate. That is, when the first lower top pressure plate 32 is engaged with the lower part of the side of the plate, the foremost end of the first middle top pressure plate is engaged with the middle groove of the side of the plate. The first middle top pressure plate 31, the first lower top pressure plate 32, the heating device 33, and the frame 6 are fixed by conventional mechanical fixing methods such as bolting and welding.

[0045] The rear pressing device 4 includes a second upper pressing plate 41, a second middle pressing plate 42, and a second lower pressing plate 43 distributed in an upper, middle, and lower manner. The front side of the second middle pressing plate 42 is located in front of the front sides of the second upper pressing plate 41 and the second lower pressing plate 43. The front sides of the second upper pressing plate 41, the second middle pressing plate 42, and the second lower pressing plate 43 can be concave-convexly fitted with the side of the plate 1, that is, the second upper pressing plate 41, the second middle pressing plate 42, and the second lower pressing plate 43 can be respectively engaged with the upper, middle, and lower grooves of the side of the plate 1. The second upper pressing plate 41, the second middle pressing plate 42, the second lower pressing plate 43, and the frame 6 are fixed by conventional mechanical fixing methods such as bolting and welding.

[0046] The softening device 5 includes a third middle pressure plate 51 and a heating element 52. The third middle pressure plate 51 is in a concave-convex fit with the central groove on the side of the board 1. In this embodiment, the heating element is connected to a second heat-conducting metal block 83, and a heating rod 81 is inserted into the second heat-conducting metal block 83 to achieve heating. Alternatively, the heating element can be a heat-conducting plate as in the prior art. The third middle pressure plate can extend into the central groove on the side of the board. The heating side 521 of the heating element 52 is located on the upper side of the third middle pressure plate 51, and there is a gap between the third middle pressure plate 51 and the heating side 521 of the heating element 52 for the edge banding 2 to pass through. Specifically, the gap allows the heating side of the heating element to contact or approach the edge banding 2 to heat and soften the bending line of the edge banding 2. The third middle pressure plate 51, the heating element 52, and the frame 6 are fixed by conventional mechanical fixing methods such as bolting and welding.

[0047] The method of use in this embodiment is as follows: After aligning the side of the board 1 with the lower end of the edge banding 2 coated with adhesive, move the board and edge banding from right to left so that the side of the board first contacts the first lower pressing plate 32 of the pressing device 3. During the movement, due to the pressing action of the first lower pressing plate 32, the lower part of the side of the board and the lower part of the edge banding can be bonded together. As the movement continues, the first middle pressing plate 31 gradually squeezes the middle part of the edge banding inward until the middle part of the edge banding is bonded to the middle groove of the side of the board. Continue moving the board and edge banding. The groove in the middle of the side of the board cooperates with the third middle pressure plate 51 of the softening device 5. The upper part of the edge banding is in a raised state. The upper part of the edge banding enters the gap between the third middle pressure plate 51 and the heating plate 52. During the movement, the heating plate 52 heats and softens the bending line of the upper part of the edge banding. Then the board is moved so that the upper, middle and lower parts of the side of the board are pressed and contacted with the second upper pressure plate 41, the second middle pressure plate 42 and the second lower pressure plate 43 of the rear pressure device 4, so that the edge banding 2 is completely adhered to the side of the board.

[0048] Example 2

[0049] like Figure 1 , Figure 2 As shown, the difference from Embodiment 1 is that two pre-pressing devices 3 are arranged side by side in the left-right direction, and there is a gap between the two pre-pressing devices 3. The front side of the first middle pressing plate 31 has an inclination angle greater than three degrees and less than fifteen degrees, and the front sides of the two first middle pressing plates 31 are located on the same straight line. The angle is matched according to the length of the first middle pressing plate so that its front end can contact the innermost end of the middle groove on the side of the plate. The smaller the angle, the longer the length.

[0050] Example 3

[0051] like Figure 1 , 3 As shown in Figure 5, the difference from Embodiment 1 or 2 is that multiple rear pressing devices 4 are arranged side by side in the left-right direction, and there is a gap between adjacent rear pressing devices 4. The front side of the upper side of the second upper pressing plate 41 of the rear pressing device 4 located on the far right is an inclined surface that gradually slopes upward from right to left.

[0052] Example 4

[0053] like Figure 1-9 As shown, the difference from Embodiment 1, 2 or 3 is that the first pressing device 3, the second pressing device 4 and the softening device 5 are respectively slidably arranged on the frame 6 in the up and down direction. The specific sliding connection is the sliding connection method in the prior art, such as the method of slide rail and slider cooperation, the method of optical axis and linear bearing cooperation, etc., and springs or tension springs are respectively provided between them and the frame 6 to give them an upward or downward elastic force.

[0054] In one embodiment, springs 91 are respectively installed between the pre-pressing device 3 and the rear-pressing device 4 and the frame 6, giving them a downward elastic force, and a tension spring 92 is installed between the softening device 5 and the frame 6, giving it an upward elastic force. In other embodiments, the pre-pressing device 3, the rear-pressing device 4, and the softening device 5 can be arranged in any combination of upward or downward elastic forces, and the switching between upward and downward elastic forces can be achieved by replacing them with tension springs or springs.

[0055] Example 5

[0056] like Figure 1-6 As shown, the difference from Embodiment 1 is that the rightmost end of the front side of the first middle top pressure plate 31, the first lower top pressure plate 32, the second upper top pressure plate 41, the second middle top pressure plate 42, the second lower top pressure plate 43, and the third middle top pressure plate 51 is provided with a first chamfer 7. The first chamfer 7 gradually tilts backward from left to right. The first chamfer 7 guides the board and the edge banding, so that the board and the edge banding are in contact with the front side of the first middle top pressure plate 31, the first lower top pressure plate 32, the second upper top pressure plate 41, the second middle top pressure plate 42, the second lower top pressure plate 43, and the third middle top pressure plate 51.

[0057] The heating side 521 of the heating plate 52 is provided with a second chamfer 522 at the right end. The second chamfer 522 gradually slopes upward from left to right. The second chamfer 522 guides the sealing strip 2 so that the sealing strip enters the gap. As another embodiment, the heating side can be set to slope upward as it gets closer to the feeding end, or the feeding end of the heating side can have a notch or other conventional technical solutions, so that the feeding end of the heating side of the heating plate and the pressing plate are in an open state.

[0058] Example 6

[0059] like Figure 1 , 2 As shown in Figures 6 and 8, the softening device 5 further includes a third lower top pressure plate 53, which is disposed on the lower side of the third middle top pressure plate 51, and the front side of the third middle top pressure plate 51 is disposed on the front side of the front side of the third lower top pressure plate 53. The front side shapes of the third middle top pressure plate and the third lower top pressure plate are in cooperation with the middle groove and lower concave-convex shape of the side of the plate.

[0060] Example 7

[0061] A method for sealing the edge of a sheet metal panel with a groove includes the following steps:

[0062] The first step involves attaching the middle and lower parts of the board side to the edge banding: After aligning the bottom of the edge banding coated with glue with the bottom of the board side, the board and edge banding are moved. During the movement, the middle and lower parts of the board and edge banding are attached to the first pressing component. The shape of the first pressing component matches the groove in the middle of the board side and the concave-convex shape in the lower part of the board side. Along the direction of board movement, the protruding part in the middle of the pressing component gradually tilts into the groove in the middle of the board side, pressing the edge banding located in the groove in the middle of the board side and the lower part of the board side to make it adhere to the board side. During the movement, the middle part of the edge banding gradually adheres to the groove in the middle of the board side. During this process, the protruding part in the middle of the pressing component heats and softens the edge banding. Specifically, one embodiment of the first pressing component is a combination of a first middle pressing plate 31 and a first lower pressing plate 32.

[0063] The second step is to heat and soften the upper bend line of the edge banding: move the board and the edge banding, and heat and soften the upper bend line of the edge banding during the movement; specifically, move the board and the edge banding so that the upper bend line of the edge banding comes into contact with or approaches the heating plate during the movement, and heat and soften the upper bend line.

[0064] In a preferred embodiment, the width of the bend line softened by heating in the second step is 0.7-1.3 times the thickness of the edge banding tape. Specifically, it can be 0.7 times, 1 time, or 1.3 times the thickness of the edge banding tape. If the width of the softening process is too wide, the bend line will not be straight because the area of ​​the edge banding tape that is easy to bend is too wide. If the width of the softening process is too narrow, the area of ​​the edge banding tape that is easy to bend is too narrow, and it will not guide the bending of the edge banding tape, resulting in a bend line that is not straight.

[0065] The third step involves attaching the upper part of the board side to the edge banding: moving the board and the edge banding so that the upper part of the edge banding contacts the second pressing component. The second pressing component causes the upper part of the edge banding to gradually bend upwards during the movement. Specifically, the second pressing component has a beveled surface. During the movement of the board, the beveled surface guides the edge banding to gradually bend towards the side of the board, as shown by the second upper pressing plate 41 of the rightmost rear pressing device 4 in Embodiment 3.

[0066] Example 8

[0067] The difference from Embodiment Seven is that it also includes:

[0068] Step 4: Fully fit the side of the board with the edge banding: Move the board and the edge banding so that the side of the board fits with the third pressing component during the movement. The shape of the third pressing component matches the concave and convex shape of the side of the board.

[0069] Example 9

[0070] The difference from Embodiment 7 or 8 is that the first pressing member has a fracture crack in the middle of the plate moving direction, that is, when the first step is performed, the fracture crack can temporarily allow the uneven protrusions on the side of the plate to enter the fracture crack.

[0071] Although the specific embodiments of the invention have been described above in conjunction with the accompanying drawings, this is not intended to limit the scope of protection of the invention. Based on the technical solutions of the invention, various modifications or variations that can be made by those skilled in the art without creative effort are still within the scope of protection of the invention.

Claims

1. An apparatus for edge banding a side edge of a panel having a groove, characterized by It comprises a rack (6), a first top pressing device (3), a second top pressing device (4) and a softening device (5) arranged on the rack (6). The first top pressing device (3) comprises a first middle top pressing plate (31), a first lower top pressing plate (32) and a heating device (33) arranged on the first middle top pressing plate (31). The second top pressing device (4) comprises a second upper top pressing plate (41), a second middle top pressing plate (42) and a second lower top pressing plate (43) arranged in an upper-middle-lower manner. The softening device (5) comprises a third middle top pressing plate (51) and a heating sheet (52).

2. An apparatus for edge banding a recessed edge of a panel as defined in claim 1, wherein The first top pressing device (3) comprises two first top pressing devices (3) arranged side by side in the left-right direction, and the two first top pressing devices (3) are spaced apart.

3. An apparatus for edge banding a recessed edge of a panel as defined in claim 1, wherein The second top pressing device (4) comprises a plurality of second top pressing devices (4) arranged side by side in the left-right direction, and the adjacent second top pressing devices (4) are spaced apart.

4. An apparatus for edge banding a recessed edge of a panel as defined in claim 1, wherein The first top pressing device (3), the second top pressing device (4) and the softening device (5) are respectively arranged on the rack (6) in the up-down direction, and a spring or a tension spring is arranged between each of the first top pressing device (3), the second top pressing device (4) and the softening device (5) and the rack (6) to provide an upward or downward elastic force.

5. An apparatus for edge banding a recessed edge of a panel as defined in claim 1, wherein, The rightmost end of the front side of the first middle top pressing plate (31), the first lower top pressing plate (32), the second upper top pressing plate (41), the second middle top pressing plate (42), the second lower top pressing plate (43) and the third middle top pressing plate (51) is provided with a first chamfer (7) which gradually inclines backward from left to right.

6. An apparatus for edge banding a recessed edge of a panel as defined in claim 1, wherein, The softening device (5) further comprises a third lower top pressing plate (53) arranged on the lower side of the third middle top pressing plate (51), and the front side of the third middle top pressing plate (51) is arranged on the front side of the front side of the third lower top pressing plate (53).

7. A method of edge banding a side edge of a panel having a groove, characterized in that, The method comprises the following steps: The first step is to make the middle and lower part of the plate side edge adhere to the edge band: after the bottom of the edge band coated with glue is aligned with the bottom of the plate side edge, the plate and the edge band are moved, and the middle and lower part of the plate and the edge band are adhered to the first pressing part in the moving process. The shape of the first pressing part is matched with the middle groove and the lower part of the plate side edge. The middle convex part of the pressing part gradually inclines into the middle groove of the plate side edge along the moving direction of the plate. The edge band pressed on the middle groove and the lower part of the plate side edge adheres to the plate side edge. The middle part of the edge band gradually adheres to the groove of the middle part of the plate side edge in the moving process. In this process, the middle convex part of the pressing part softens the edge band by heating; The second step is to heat and soften the upper bending line of the edge band: the plate and the edge band are moved, and the upper bending line of the edge band is heated and softened in the moving process; The third step is to make the upper part of the plate side edge adhere to the edge band: move the plate and the edge band, so that the upper part of the edge band contacts the second pressing part. The second pressing part makes the upper part of the edge band gradually bend upward in the moving process.

8. A method of edge banding a side edge of a panel having a recess as claimed in claim 7, characterized in that, Further comprising: The fourth step is to make the plate side edge adhere to the edge band completely: move the plate and the edge band, so that the plate side edge adheres to the third pressing part in the moving process. The shape of the third pressing part is matched with the side edge of the plate.

9. The method of claim 7, wherein the recessed edge of the panel is formed by a router having a cutting head with a cutting edge and a recessed portion. The middle part of the first pressing part along the moving direction of the plate has a fracture seam.

10. A method of edge banding a side edge of a panel having a recess according to any one of claims 7 to 9, wherein, The width of the bending line heated and softened in the second step is 0.7-1.3 times the thickness of the edge band.

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