A processing machine for making packaging structure from multi-layer corrugated cardboard

Abstract

The invention discloses a processing machine for making a packaging structure from multi-layer corrugated paperboards, comprising a control device, a first feeding device capable of outputting the bottom layer of the corrugated paperboards of the product, a workbench connected to the output end of the first feeding device, a second feeding device for outputting the remaining layers of the corrugated paperboards of the product in sequence, and a centralized gluing device connected to the output end of the second feeding device for gluing the outputted corrugated paperboards. A working area is arranged on the workbench, and the output ends of the first feeding device and the centralized gluing device are both connected to the working area. The control device is respectively connected to the first feeding device and the second feeding device, and then controls the corrugated paperboards outputted by the first feeding device to arrive at the workbench, and the corrugated paperboards outputted by the second feeding device are sequentially delivered to the working area after passing through the centralized gluing device, so that each layer of the corrugated paperboards is sequentially stacked layer by layer in the working area, and the production efficiency is improved while the product quality is improved by the above-mentioned device.

Description

Technical Field

[0001] The invention particularly relates to a processing machine for producing packaging structures from multi-layer corrugated paperboard. Background Art

[0002] Packaging boxes are used to wrap products to protect and decorate them, but traditional packaging boxes have a space for placing products inside the box. Traditional packaging boxes need to ensure the hardness of the material and, in order to improve the protective effect of the packaging boxes and the versatility of the packaging boxes for materials, the applicant has studied a packaging structure formed by stacking multiple layers of cardboard layer by layer, and each layer of corrugated cardboard is provided with a hollow groove of a preset shape. After the layers of corrugated cardboard are stacked, the hollow grooves of each layer are combined to form a cavity for placing items. This new packaging structure is not only highly versatile for different materials, but also can be made into this packaging structure by stacking and combining corrugated cardboards such as honeycomb cardboard, hard cardboard, and paper.

[0003] Reference Figures 1 to 3 This stacked packaging structure consists of a first corrugated cardboard a1 located at the bottom and a second corrugated cardboard a2 stacked on the first corrugated cardboard a1. The first corrugated cardboard a1 and the second corrugated cardboard a2 are stacked in sequence. The second corrugated cardboard a2 has multiple hollow cavities a21 preset thereon. After they are stacked, the hollow cavities a21 of each second corrugated cardboard a2 are combined to form a larger accommodating cavity for accommodating items and placing products.

[0004] However, to manufacture the above packaging structure, each layer of corrugated cardboard needs to be glued and stacked. Manual operation requires sorting out different materials and then gluing and stacking them one by one in order. The operation is cumbersome and prone to errors, resulting in low work efficiency and poor product quality.

[0005] The present invention is just produced based on the above-mentioned shortcomings. Summary of the invention

[0006] The purpose of the present invention is to overcome the deficiencies of the prior art and to provide a processing device for a multi-layer material combined packaging structure that can improve production efficiency while improving product quality.

[0007] The invention is realized by the following technical solutions:

[0008] A processing machine for making a packaging structure from multi-layer corrugated cardboard comprises a control device, a first feeding device capable of outputting the bottom layer of the corrugated cardboard of the product, a workbench connected to the output end of the first feeding device, a second feeding device for outputting the remaining layers of the corrugated cardboard of the product in sequence, and a centralized gluing device connected to the output end of the second feeding device for gluing the outputted corrugated cardboard. A working area is arranged on the workbench, and the output ends of the first feeding device and the centralized gluing device are both connected to the working area. The control device is respectively connected to the first feeding device and the second feeding device, and controls the corrugated cardboard outputted by the first feeding device to arrive at the workbench, and the corrugated cardboard outputted by the second feeding device passes through the centralized gluing device and is sequentially sent to the working area, so that each layer of the corrugated cardboard is sequentially stacked layer by layer in the working area.

[0009] In the processing machine for making packaging structure of multi-layer corrugated cardboard as described above, the second feeding device includes a first frame, at least one feeding assembly is arranged on the first frame, the feeding assembly includes a first conveyor belt, first side baffles are arranged on both sides of the first conveyor belt, a first blocking plate is arranged on the output side of the first conveyor belt, the upper surface of the first conveyor belt and the first side baffles and the first blocking plate form a storage space for stacking and storing corrugated cardboards, the first blocking plate is arranged above the first conveyor belt and a first discharge gap for a piece of corrugated cardboard to pass through is reserved between the two, the first conveyor belt is connected to a first driving device for driving the first conveyor belt to move and thereby push the corrugated cardboard at the bottom layer out of the first discharge gap, and the first driving device of each feeding assembly is connected to the control device.

[0010] The processing machine for making packaging structure of multi-layer corrugated cardboard as described above, the first feeding device includes a second frame, a second conveyor belt is provided on the second frame, a second baffle plate is provided on the output side of the second conveyor belt, second side baffle plates are provided on both sides of the second conveyor belt, the upper surface of the second conveyor belt and the second baffle plates and the second side baffle plates form a storage space for stacking and storing corrugated cardboard, the second baffle plate is arranged above the second conveyor belt and a second discharge gap is left between the two for a piece of corrugated cardboard to pass through, the second conveyor belt is connected to a second driving device for driving the second conveyor belt to move and thereby push the corrugated cardboard located at the bottom layer out of the second discharge gap, and the control device is connected to the second driving device and controls the movement of the second driving device.

[0011] In the processing machine for forming a packaging structure from multi-layer corrugated cardboard as described above, the centralized gluing device includes a third frame, the third frame is provided with a third conveyor belt and a guide plate arranged on the upper side of the conveyor belt, at least two guide plates are arranged on the upper surface of the third conveyor belt, two guide plates are provided and the spacing between the two guide plates gradually decreases along the conveying direction of the third conveyor belt, the two guide plates and the upper surface of the third conveyor belt form a conveying channel for conveying corrugated cardboard along the conveying direction of the third conveyor belt, the output end of the second feeding device and the input end of the third conveyor belt are arranged correspondingly, and the output end of the feeding channel is arranged correspondingly to the working area.

[0012] In the processing machine for making packaging structures from multi-layer corrugated cardboard as described above, a plurality of third feeding devices are provided on the third frame, and the third feeding devices are provided with discharge ports, the discharge ports of the third feeding devices are located above the conveying channel, and the control device is connected to the third feeding devices.

[0013] In the processing machine for making packaging structures from multi-layer corrugated cardboard as described above, the centralized gluing device also includes a gluing assembly arranged on the output side of the third conveyor belt, the gluing assembly includes a glue stick and a pressing stick, the glue stick and the pressing stick have gluing gaps aligned with the upper surface of the third conveyor belt, adhesive is attached to the side of the glue stick, and at least one of the pressing stick and the glue stick is connected to a third driving device for driving them to rotate.

[0014] As described above, in the processing machine for making packaging structures from multi-layer corrugated cardboard, the workbench includes a fourth conveyor belt, the input end of the fourth conveyor belt is arranged corresponding to the output end of the first feeding device, and the working area of ​​the fourth conveyor belt is arranged on the upper surface of the fourth conveyor belt.

[0015] In the processing machine for making packaging structures of multi-layer corrugated cardboard as described above, a limiting plate is provided on the workbench which can be moved to the upper surface of the fourth conveyor belt to block the sheet material from being conveyed backwards. When the limiting plate is moved to the upper surface of the fourth conveyor belt, the limiting plate is located at the rear edge of the working area in the conveying direction of the fourth conveyor belt.

[0016] In the processing machine for making packaging structures from multi-layer corrugated cardboard as described above, at least two fourth conveyor belts are provided, the limiting plate is provided below the upper surface of the fourth conveyor belt, the limiting plate is provided with a blocking portion that can pass through the gap between two adjacent fourth conveyor belts, and the workbench is provided with a fourth driving device that is connected to the limiting plate and thereby pushes the limiting plate to move toward the fourth conveyor belt.

[0017] Compared with the prior art, the invention has the following advantages:

[0018] The processing machine for making a packaging structure from multi-layer corrugated cardboard of the present invention comprises a feeding device, a second feeding device, a centralized gluing device and a workbench. Through the operation of each device, the multi-layer corrugated cardboard can be automatically fed, glued, stacked and aligned. These processes can be completed by only one device, thereby reducing the complicated and error-prone processes such as sorting different sheet materials during manual operation, greatly improving the production efficiency, and improving the quality of the product while improving the efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the manufacturing process of the first embodiment of the packaging material of the present invention;

[0020] Figure 2 is a schematic diagram of a manufacturing process of a second embodiment of the packaging material of the present invention;

[0021] Figure 3 is a schematic diagram of a manufacturing process of a third embodiment of the packaging material of the present invention;

[0022] Figure 4 It is a three-dimensional schematic diagram of the centralized gluing and shaping device for corrugated paperboard of the present invention;

[0023] Figure 5 is a three-dimensional schematic diagram of a first feeding device of the present invention;

[0024] Figure 6 is an exploded view of the workbench of the present invention;

[0025] Figure 7 is a three-dimensional schematic diagram of a second feeding device of the present invention;

[0026] Figure 8 It is a three-dimensional schematic diagram of the feeding assembly of the present invention;

[0027] Fig. 9 is a three-dimensional schematic diagram of a centralized gluing device of the present invention;

[0028] Fig.10 is a three-dimensional schematic diagram of the viscose of the present invention;

[0029] Fig.11 is a cross-sectional view of the adhesive assembly of the present invention. DETAILED DESCRIPTION

[0030] The invention will be further described below in conjunction with the accompanying drawings:

[0031] The directions described in the specification of the invention, such as "up", "down", "left", "right", "front", "back", etc., are based on the directions of the drawings and are intended to facilitate the description of the relationship between the various components. They do not indicate the unique or absolute positional relationship between the various components. They are only one of the implementation methods of the invention and are not a limitation on its implementation method.

[0032] like Figure 1 As shown, a processing machine for making a packaging structure of a multi-layer corrugated cardboard includes a control device 1, a first feeding device 2 capable of outputting the bottom layer of the corrugated cardboard of the product, a workbench 5 connected to the output end of the first feeding device 2, a second feeding device 3 for outputting the remaining layers of the corrugated cardboard of the product in sequence, and a centralized gluing device 4 connected to the output end of the second feeding device 3 for gluing the outputted corrugated cardboard. A working area 50 is provided on the workbench 5. The output ends of the first feeding device 2 and the centralized gluing device 4 are both connected to the working area 50. The control device 1 is respectively connected to the first feeding device 2 and the second feeding device 3, and then controls the corrugated cardboard outputted by the first feeding device 2 to arrive at the workbench 5, and the corrugated cardboard outputted by the second feeding device 3 passes through the centralized gluing device 4 and is sequentially sent to the working area 50, so that each layer of the corrugated cardboard is stacked layer by layer in the working area 50. The control device 1 can adopt a general electric control box, a microcomputer, etc.

[0033] The detailed structure is as follows:

[0034] like Figure 5 As shown, the first feeding device 2 includes a second frame 21, and a second conveyor belt 211 is provided on the second frame 21. Figure 5 As shown, the second conveyor belt 211 can be set as one or multiple ones can be set side by side to adapt to corrugated cardboards of different sizes and shapes. The output side of the second conveyor belt 211 is provided with a second baffle plate 212, and the two sides of the second conveyor belt 211 are provided with second side baffle plates 213. The upper surface of the second conveyor belt 211 and the second baffle plates 212 and the second side baffle plates 213 form a storage space for stacking and storing corrugated cardboards. When in use, a certain number of sheet materials for the bottom layer of the product are stacked in the storage space. The second baffle plate 212 is set on the second conveyor belt 211 and a second discharge gap 214 is left between the two for a piece of corrugated paperboard to pass through. The second conveyor belt 211 is connected to a second driving device 215 that drives the second conveyor belt 211 to move and push the corrugated paperboard at the bottom layer out of the second discharge gap 214. The control device 1 is connected to the second driving device 215 and controls the movement of the second driving device 215. When the second conveyor belt 211 moves, a piece of corrugated paperboard at the bottom layer of the accommodating space is pushed out from the second discharge gap 214 to the workbench 5. In order to ensure smooth transmission of the sheet material, Figure 5As shown, a guide roller assembly 102 is also provided between the second conveyor belt 211 and the workbench 5 .

[0035] like Figure 8 and Fig. 9 As shown, the second feeding device 3 includes a first frame 31, and at least one feeding assembly 32 is arranged on the first frame 31. The feeding assembly 32 includes a first conveyor belt 321. The first conveyor belt 321 can be set as one or multiple ones can be arranged side by side to adapt to corrugated cardboards of different sizes and shapes. First side baffles 323 are arranged on both sides of the first conveyor belt 321. A first blocking plate 322 is arranged on the output side of the first conveyor belt 321. The upper surface of the first conveyor belt 321 and the first side baffles 323 and the first blocking plate 322 form a storage space for stacking and storing corrugated cardboards. When in use, the storage space is stacked with A certain number of second-layer, third-layer and other layers of corrugated cardboards for products are placed. If a certain specification of corrugated cardboards is used in large quantities on the product, the corrugated cardboards of this type can be stored in different loading components 32 respectively. The first blocking plate 322 is arranged above the first conveyor belt 321 and a first discharge gap 324 for a piece of corrugated cardboard to pass through is left between the two. The first conveyor belt 321 is connected to a first driving device 325 that drives the first conveyor belt 321 to move and then pushes the corrugated cardboard at the bottom layer out of the first discharge gap 324. The first driving device 325 of each loading component 32 is connected to the control device 1.

[0036] Since different second corrugated paperboards a2 may have different hollow cavities, a larger number of second feeding devices 3 are required. In order to solve this problem, as a preferred embodiment, Figure 4 As shown, a plurality of third feeding devices 6 are provided on the third frame 41, and the third feeding device 6 is provided with a discharge port 610, and the discharge port 610 of the third feeding device 6 is located above the conveying channel 410. The control device 1 is connected to the third feeding device 6, and the structure of the third feeding device 6 adopts the same structure as the second feeding device 3, and it is sufficient that the position of the first discharge gap 324 is located above the conveying channel 410. The discharge order of the corrugated cardboards of the second feeding device 3 and the third feeding device 6 is controlled by the control device 1, so that each corrugated cardboard is conveyed backward in the conveying channel 410 according to a preset order.

[0037] like Figure 6 As shown, the workbench 5 includes a fourth conveyor belt 25 , the input end of the fourth conveyor belt 25 is arranged corresponding to the output end of the first feeding device 2 , and the working area 50 of the fourth conveyor belt 25 is arranged on the upper surface of the fourth conveyor belt 25 .

[0038] like Figure 6As shown, the workbench 5 is provided with a limiting plate 232 which can be moved to the upper surface of the fourth conveyor belt 25 to block the sheet material from being conveyed backwards. When the limiting plate 232 is moved to the upper surface of the fourth conveyor belt 25, the limiting plate 232 is located at the rear edge of the working area 50 in the conveying direction of the fourth conveyor belt 25.

[0039] like Figure 6 As shown, at least two fourth conveyor belts 25 are provided, the limiting plate 232 is provided below the upper surface of the fourth conveyor belt 25, the limiting plate 232 is provided with a blocking portion 233 capable of passing through the gap between two adjacent fourth conveyor belts 25, and the workbench 5 is provided with a fourth driving device 261 connected to the limiting plate 232 to push the limiting plate 232 to move toward the fourth conveyor belt 25.

[0040] like Figure 6 As shown, the third frame 23 is provided with a plurality of fourth conveyor belts 25, and the output end of the first feeding device 2 is connected with the input end of the fourth conveyor belt 25, so that the corrugated cardboard output from the first feeding device 2 can be transported to the working area 50 through the fourth conveyor belt 25, and the limiting plate 232 moves to the upper side of the fourth conveyor belt 25 to block the corrugated cardboard from continuing to be transported backward, so that the corrugated cardboard transported to the working area 50 remains in the working area 50 until all the corrugated cardboards arrive at the working area 50 and are stacked. After all the corrugated cardboards are stacked, the adjacent corrugated cardboards are bonded and connected.

[0041] like Fig. 9 As shown, the centralized gluing device 4 includes a third frame 41, a third conveyor belt 411 is provided on the third frame 41, at least two guide plates 412 are provided on the upper surface of the third conveyor belt 411, and a feeding channel 410 for conveying corrugated cardboard is formed between the two guide plates 412, the output end of the second feeding device 3 is arranged corresponding to the input end of the third conveyor belt 411, and the outlet of the feeding channel 410 is aligned with the working area 50, so that the corrugated cardboard output from the outlet of the feeding channel 410 can reach the working area 50 after passing through the centralized gluing device 4. Preferably, the two guide plates 412 are provided with a straight lead-out plate section at one end of the conveying channel 410 output end, and the lead-out plate sections of the two guide plates 412 are arranged in parallel, so that the corrugated cardboard passing through the conveying channel 410 can be neatly output as long as the spacing between the two lead-out plate sections is consistent with the width of the corrugated cardboard.

[0042] like Fig.10 and Fig.11As shown, the centralized gluing device 4 also includes a gluing assembly 42 arranged on the output side of the third conveyor belt 411, and the gluing assembly 42 includes a glue stick 421 and a pressure stick 422, and the glue stick 421 and the pressure stick 422 have a gluing gap 420 aligned with the upper surface of the third conveyor belt 411, and adhesive is attached to the side of the glue stick 421, and at least one of the pressure stick 422 and the glue stick 421 is connected to a third driving device 423 for driving them to rotate.

[0043] The manufacturing method of the processing machine for making a packaging structure using the multi-layer corrugated paperboard is as follows:

[0044] Step A: the first loading device 2 outputs the first corrugated paperboard a1 to the shaping work area 201 of the workbench 5 .

[0045] Describe in detail, such as Figure 4 and Figure 5 As shown, the control device 1 controls the second driving device 215 to move, thereby driving the second conveyor belt 211 to move and further pushing the first corrugated cardboard a1 located at the bottom layer out of the second discharge gap 214 to the shaping work area 201. In addition, the guide roller assembly 102 and the fourth conveyor belt 25 can assist in transporting the first corrugated cardboard to the shaping work area 201.

[0046] Step B: the second feeding device 3 outputs the second corrugated paperboard a2 to the centralized gluing device 4.

[0047] Describe in detail, such as Figure 8 and Fig. 9 As shown, each loading assembly 32 can be used to output second corrugated paperboards a2 of the same or different shapes, that is, it can output sheet materials with different types of hollow cavities. The control device 1 can output the second corrugated paperboards a2 in a preset order by controlling the action sequence of the first driving devices 325 of each loading assembly 32. The second corrugated paperboards a2 are successively output to the third conveyor belt 411 in order.

[0048] Step C: the centralized gluing device 4 glues the second corrugated paperboards a2 one by one and outputs them to the shaping work area 201 of the workbench 5.

[0049] Describe in detail, such as Fig.10 and Fig.11 As shown, the third conveyor belt 411 delivers the second corrugated cardboard a2 thereon from the outlet of the feeding channel 410, and then the second corrugated cardboard a2 passes through the adhesive gap 420, the second corrugated cardboard a2 is stained with adhesive, and then the second corrugated cardboard a2 is transported to the shaping work area 201 and stacked with the first corrugated cardboard a1.

[0050] Step D, the workbench 5 aligns and bonds the stacked first corrugated paperboard a1 and the second corrugated paperboard a2, and after the first corrugated paperboard a1 and the second corrugated paperboard a2 are stacked and bonded in sequence, the hollow grooves a21 of each second corrugated paperboard a2 form a cavity for accommodating items. ;

[0051] Describe in detail, such as Figure 5 , Figure 7 and Figure 8 As shown, the control device 1 controls the third driving device 237 and the fourth driving device 239 to operate, so that the second push plate 238 and the first push plate 235 move toward the first limiting plate 231 and the first limiting plate 231 respectively, so as to align the stacked sheet materials, and at the same time, adhesive is coated between them.

[0052] It should be pointed out that for those skilled in the art, several modifications and improvements can be made without departing from the structure of the present invention, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicality of the patent. The protection scope required by this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to interpret the content of the claims.

Claims

1. A machine for processing multi-layer corrugated cardboard into packaging structures, characterized in that: The invention comprises a control device (1), a first feeding device (2) capable of outputting the bottom layer of corrugated paperboard of a product, a workbench (5) connected to the output end of the first feeding device (2), a second feeding device (3) for outputting the remaining layers of corrugated paperboard of the product in sequence, and a centralized gluing device (4) connected to the output end of the second feeding device (3) for gluing the outputted corrugated paperboards. A working area (50) is provided on the workbench (5). The output ends of the first feeding device (2) and the centralized gluing device (4) are both connected to the working area (50). The control device (1) is respectively connected to the first feeding device (2) and the second feeding device (3), and controls the corrugated paperboards outputted by the first feeding device (2) to arrive at the workbench (5), and the corrugated paperboards outputted by the second feeding device (3) to pass through the centralized gluing device (4) and then be delivered to the working area (50) in sequence, so that each layer of corrugated paperboards is stacked layer by layer in sequence in the working area (50). The second loading device (3) comprises a first frame (31), at least one loading assembly (32) is arranged on the first frame (31), the loading assembly (32) comprises a first conveyor belt (321), both sides of the first conveyor belt (321) are provided with first side baffles (323), the output side of the first conveyor belt (321) is provided with a first baffle plate (322), the upper surface of the first conveyor belt (321) and the first side baffle plate (323) and the first baffle plate (322) form a stacking plate for stacking. A storage space for storing corrugated paperboards, wherein the first blocking plate (322) is arranged above the first conveyor belt (321) and a first discharge gap (324) is left between the first blocking plate (322) and the first conveyor belt (321) for a piece of corrugated paperboard to pass through, the first conveyor belt (321) is connected to a first driving device (325) for driving the first conveyor belt (321) to move and thereby push the corrugated paperboard at the bottom layer out of the first discharge gap (324), and the first driving device (325) of each feeding assembly (32) is connected to the control device (1); The first loading device (2) comprises a second frame (21), a second conveyor belt (211) is provided on the second frame (21), a second baffle plate (212) is provided on the output side of the second conveyor belt (211), second side baffle plates (213) are provided on both sides of the second conveyor belt (211), the upper surface of the second conveyor belt (211) and the second baffle plates (212) and the second side baffle plates (213) form a storage space for stacking and storing corrugated cardboards, the second baffle plate (212) is arranged above the second conveyor belt (211) and a second discharge gap (214) is left between the second conveyor belt (211) and the second discharge gap (214) is left for a piece of corrugated cardboard to pass through, the second conveyor belt (211) is connected to a second driving device (215) for driving the second conveyor belt (211) to move and thereby push the corrugated cardboard at the bottom layer out of the second discharge gap (214), and the control device (1) is connected to the second driving device (215) and controls the movement of the second driving device (215); The centralized gluing device (4) comprises a third frame (41), on which a third conveyor belt (411) and a guide plate (412) arranged on the upper side of the conveyor belt (411) are arranged, and at least two guide plates (412) are arranged on the upper surface of the third conveyor belt (411), and two guide plates (412) are arranged, and the distance between the two guide plates (412) gradually decreases along the conveying direction of the third conveyor belt (411), and the two guide plates (412) and the upper surface of the third conveyor belt (411) form a conveying channel (410) for conveying corrugated cardboard along the conveying direction of the third conveyor belt (411), and the output end of the second feeding device (3) and the input end of the third conveyor belt (411) are arranged correspondingly, and the output end of the conveying channel (410) and the working area (50) are arranged correspondingly; The third frame (41) is provided with a plurality of third feeding devices (6), each of the third feeding devices (6) is provided with a discharge port (610), the discharge port (610) of the third feeding device (6) is located above the conveying channel (410), and the control device (1) is connected to the third feeding device (6); The centralized gluing device (4) further comprises a gluing assembly (42) arranged at the output side of the third conveyor belt (411), the gluing assembly (42) comprising a glue stick (421) and a pressing stick (422), the glue stick (421) and the pressing stick (422) leaving a gluing gap (420) aligned with the upper surface of the third conveyor belt (411), an adhesive being attached to the side surface of the glue stick (421), and at least one of the pressing stick (422) and the glue stick (421) being connected to a third driving device (423) for driving them to rotate; The workbench (5) comprises a fourth conveyor belt (25), the input end of the fourth conveyor belt (25) is arranged corresponding to the output end of the first feeding device (2), and the working area (50) of the fourth conveyor belt (25) is arranged on the upper surface of the fourth conveyor belt (25); The workbench (5) is provided with a limit plate (232) that can move to the upper surface of the fourth conveyor belt (25) and thereby block the sheet material from being conveyed backwards. When the limit plate (232) moves to the upper surface of the fourth conveyor belt (25), the limit plate (232) is located at the rear edge of the working area (50) in the conveying direction of the fourth conveyor belt (25); At least two fourth conveyor belts (25) are provided, the limiting plate (232) is provided below the upper surface of the fourth conveyor belt (25), the limiting plate (232) is provided with a blocking portion (233) capable of passing through the gap between two adjacent fourth conveyor belts (25), and the workbench (5) is provided with a fourth driving device (261) connected to the limiting plate (232) and thereby pushing the limiting plate (232) to move toward the fourth conveyor belt (25).

2. The machine for processing multi-layer corrugated cardboard into packaging structures according to claim 1, characterized in that: One end of the two guide plates (412) located at the output end of the conveying channel (410) is provided with a straight lead-out plate section, and the lead-out plate sections of the two guide plates (412) are arranged in parallel.

Images