Longitudinal trimming waste recycling device

Abstract

This invention relates to the field of cardboard production. The invention discloses a longitudinal trimming waste recycling device, comprising: a frame, a transverse movement mechanism, a forward / reverse blade mechanism, a beveling mechanism, a trimming trough, and a movable pad. The transverse movement mechanism is mounted on the frame, and the forward / reverse blade mechanism, trimming trough, and movable pad are all mounted on the transverse movement mechanism. The output end of the forward / reverse blade mechanism is connected to the beveling mechanism. The movable pad is connected to the side of the trimming trough facing away from the beveling mechanism. The trimming trough includes a waste trough with its opening facing forward. The beveling mechanism includes a cutting blade inclined relative to the opening direction of the waste trough, with the rear side of the cutting blade inclined towards the waste trough. This device can stably recycle waste edges from different orders, ensuring that waste edges smoothly enter the waste trough after order changes.

Description

Technical Field

[0001] This invention relates to the field of paperboard production, and in particular to a device for recycling longitudinal cutting and trimming waste. Background Technology

[0002] In the production of paperboard, it is necessary to slit the paperboard longitudinally, that is, to cut it along both sides of the paperboard in the direction of travel to obtain paperboard of a specific width. The current longitudinal slitting machine structure is equipped with a transverse movement mechanism to move the cutting blade, which needs to be adjusted in size. The waste material cut off by the cutting blade is guided to the waste recycling tank through the trimming groove.

[0003] When changing orders to different widths, the lateral position of the trimming blade is adjusted accordingly, resulting in two discontinuous width situations on the cardboard. The first situation occurs when the width of the cardboard in the original order is smaller than that in the new order. At the cardboard changeover point, there is a sudden change in waste width; the waste before this point is wider than the waste after. In this case, the waste from both the original and new orders can still smoothly enter the trimming groove. The second situation occurs when the width of the original order is greater than that in the new order. At this point, the waste along the cardboard's forward direction suddenly increases, forming a shoulder. This makes it difficult for the waste to enter the trimming groove, and in severe cases, the shoulder may even tear the cardboard due to contact with the groove. Therefore, the current structure related to trimming waste recycling still has room for improvement. Summary of the Invention

[0004] The present invention aims to solve at least one of the technical problems existing in the background art.

[0005] This invention provides a longitudinal trimming waste recycling device, comprising: a frame, a transverse movement mechanism, a forward and reverse blade mechanism, a beveling mechanism, a trimming groove, and a movable pad. The transverse movement mechanism is mounted on the frame. The forward and reverse blade mechanism, the trimming groove, and the movable pad are all mounted on the transverse movement mechanism. The output end of the forward and reverse blade mechanism is connected to the beveling mechanism. The movable pad is connected to the side of the trimming groove opposite to the beveling mechanism. The trimming groove includes a waste trough with its opening facing forward. The beveling mechanism includes a cutting blade that is inclined relative to the opening direction of the waste trough, and the rear side of the cutting blade tends towards the waste trough.

[0006] The beneficial effects of the longitudinal trimming waste recycling device of the present invention are as follows: The longitudinal trimming waste recycling device of the present invention is equipped with a transverse movement mechanism that drives the advance and retraction knife mechanism, the oblique cutting mechanism, the trimming groove and the movable pad to move. When the size and position of the waste edge change due to order changes, the movement of the transverse movement mechanism can make the waste groove and the trimming knife move and adjust accordingly, so that the position of the waste groove and the position of the waste edge always correspond to ensure the recycling of waste edges from different orders. In addition, the oblique cutting of the waste edge of the cardboard by the advance and retraction knife mechanism and the oblique cutting mechanism can better ensure that the waste edge enters the waste groove smoothly after the order is changed.

[0007] As some sub-solutions of the above technical solution, the cutting blade includes a blade edge, the blade edge is pointed, and the side of the blade edge facing the trimming groove is a bevel.

[0008] As some sub-solutions of the above technical solution, the oblique cutting mechanism also includes a pad block. The movable pad plate has an installation groove on one side adjacent to the waste trough. One side of the installation groove is connected to the trimming groove. The pad block is fixed in the installation groove. The pad block has a knife groove. When the cutting knife is driven to swing downward, the lower end of the cutting knife extends into the knife groove.

[0009] As a sub-solution of the above technical solution, the rear side of the lower end of the cutting blade is located above the opening of the waste trough.

[0010] As some sub-solutions of the above technical solutions, the advance and retraction mechanism includes a linear driver, a rotating shaft, and a swing arm. The linear driver includes a drive seat and a drive rod. The drive seat is hinged to the frame, the drive rod is hinged to the swing arm, the swing arm is driven to the rotating shaft, and the rotating shaft is rotatably connected to the frame. The oblique cutting mechanism also includes a knife holder, which is fixedly connected to the rotating shaft, and the cutting blade is obliquely disposed on the knife holder.

[0011] As some sub-solutions of the above technical solution, the transverse movement mechanism includes a transverse slide rail, a first slide block, a second slide block, and an opposing movement structure. The transverse slide rail is mounted on the frame. The first slide block and the second slide block both slide along the transverse slide rail. The cutter holders included in the two oblique cutting mechanisms are respectively mounted on the first slide block and the second slide block. The opposing movement structure drives the first slide block and the second slide block to move simultaneously towards or away from each other.

[0012] As some sub-solutions of the above technical solution, the opposing moving structure includes a drive motor, a drive wheel, a first transmission bar and a second transmission bar. The drive motor is mounted on the frame and is driven by the drive wheel. The first transmission bar and the second transmission bar are fixedly connected to the first slide and the second slide, respectively. The first transmission bar and the second transmission bar abut against the drive wheel on both sides of the drive wheel.

[0013] As some sub-solutions of the above technical solution, the tool holder is located on the side of the trimming groove away from the movable pad, the transverse movement mechanism further includes a transverse slide bar, the transverse slide bar and the transverse movement rail are both located in front of the tool holder, the trimming groove is also provided with a front roller and a rear roller, the front roller and the rear roller are respectively located on the front side and the rear side of the transverse slide bar, and the front roller and / or the rear roller roll on the transverse slide bar.

[0014] As a sub-solution of the above technical solution, the material used for the pad block is plastic.

[0015] As a sub-solution of the above technical solution, the material used for the pad block is nylon. Attached Figure Description

[0016] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0017] Figure 1 Axonometric view of an embodiment of a longitudinal trimming waste recycling device Figure 1 ;

[0018] Figure 2 A diagram showing the order placement before changing the cardboard;

[0019] Figure 3 A diagram illustrating the cutting of cardboard edges when changing the order position for cardboard.

[0020] Figure 4 A partial top view of an embodiment of a longitudinal trimming waste recycling device;

[0021] Figure 5 for Figure 2 A magnified view of a section at point A in the middle;

[0022] Figure 6 This is a schematic diagram of the blade pad block.

[0023] Figure 7 Axonometric view of an embodiment of a longitudinal trimming waste recycling device Figure 2

[0024] Figure 8 This is a schematic diagram of the tool advance and retraction mechanism.

[0025] In the attached diagram: 1 - frame; a1 - scrap edge from previous order; a2 - scrap edge from subsequent order;

[0026] 2-Beveling mechanism; 21-Trimming blade; 211-Blade edge; 22-Blade holder; 23-Blade pad block; 231-Blade groove; 232-Screw hole; 24-Trimming motor;

[0027] 31-Modible pad; 32-Trimming groove; 321-Waste trough;

[0028] 4-Transverse movement mechanism; 41-Transverse movement slide rail; 43-Second slide block; 44-Drive motor; 46-First transmission bar; 47-Second transmission bar; 48-Transverse slide bar; 491-Front roller; 492-Rear roller;

[0029] 51-Linear actuator; 52-Shaft; 53-Oscillator. Detailed Implementation

[0030] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0031] In the description of this invention, it should be understood that the orientation descriptions, such as up, down, front, back, left, right, etc., are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention.

[0032] In the description of this invention, "several" means an indefinite quantity, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. The use of "first" and "second" in the description is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features. The use of "and / or" throughout the text indicates three parallel solutions; for example, A and / or B indicates a solution satisfied by A, a solution satisfied by B, or a solution satisfied by both A and B.

[0033] In the description of this invention, if there is a short phrase containing multiple parallel features, the modifier in the phrase defines the closest feature. For example, "B, C, and E connected to D are set on A" means that B is set on A, E is connected to D, and C is not defined. However, modifiers indicating the relationship between features, such as "interval setting" or "circular arrangement," do not fall into this category. Modifiers preceded by "all" define all features in the short phrase. For example, "B, C, and D are all set on A" means that B, C, and D are all set on A. In statements where the subject is omitted, the omitted subject is the subject of the preceding statement; that is, "A has B and includes C" means that A has B and A includes C.

[0034] In the description of this invention, unless otherwise explicitly defined, terms such as "set up," "install," and "connect" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this invention in conjunction with the specific content of the technical solution.

[0035] The following is combined with Figures 1 to 8 Embodiments of the present invention will be described.

[0036] This embodiment relates to a longitudinal trimming waste recycling device, which is used in conjunction with a longitudinal slitting machine to recycle the waste edges cut off from both sides by the machine. When changing orders of different widths, on the one hand, due to the time difference between the adjustment of the trimming groove 32 and the electronic adjustment of the longitudinal cutting blade in the traditional waste recycling device, the waste edges may be unable to enter the trimming groove 32 immediately after the adjustment of the longitudinal cutting blade, causing blockage of the trimming groove 32 and resulting in machine downtime for maintenance. On the other hand, when the width of the waste edges increases after changing orders, that is, the width of the waste edges a1a1 of the previous order is smaller than the width of the waste edges a2a2 of the subsequent order, the shoulder formed by the waste edges at the larger size position may get stuck in the groove opening of the waste groove 321, causing the waste edges to block the waste groove 321.

[0037] Currently, the main method to solve the blockage caused by the shoulder is to design a cross-cutting blade at the end of the slitting machine. This cross-cuts the cardboard at the order change location, where the waste edge size increases, leaving a certain gap between the previous and subsequent order cardboard. This allows sufficient time for adjustment of the waste tray 321 or the waste edge position during continuous cardboard conveying. After the cardboard is cross-cut, the previous and subsequent order cardboards can only be conveyed by front pushing and rear pulling power, respectively. Both are in a unilateral power conveying state, which can easily cause the cardboard to deviate from its center during conveying, affecting the positioning accuracy of subsequent cardboard processing.

[0038] The longitudinal trimming waste recycling device of this embodiment includes a frame 1, a transverse movement mechanism 4, a forward and backward cutting mechanism, a beveling mechanism 2, a trimming groove 32, and a movable pad 31. The transverse movement mechanism 4 is mounted on the frame 1. The forward and backward cutting mechanism, the trimming groove 32, and the movable pad 31 are all mounted on the transverse movement mechanism 4. The output end of the forward and backward cutting mechanism is connected to the beveling mechanism 2. The movable pad 31 is connected to the side of the trimming groove 32 facing away from the beveling mechanism 2. The trimming groove 32 includes a waste trough 321 with its opening facing forward. The beveling mechanism 2 includes a cutting blade 21 that is inclined relative to the opening direction of the waste trough 321. The rear side of the cutting blade 21 tends towards the waste trough 321.

[0039] In the longitudinal trimming waste recycling device of this embodiment, the transverse movement mechanism 4 can drive the advance and retraction knife mechanism, the oblique cutting mechanism 2, the trimming groove 32, and the movable pad 31 to move. When the size and position of the waste edge change due to order changes, the movement of the transverse movement mechanism 4 can simultaneously adjust the waste groove 321 and the trimming knife 21, ensuring that the position of the waste groove 321 always corresponds to the position of the waste edge, thus guaranteeing the recycling of waste edges from different orders. Furthermore, by configuring the advance and retraction knife mechanism and the oblique cutting mechanism 2 to obliquely cut the waste edge of the cardboard, it can better ensure that the waste edge smoothly enters the waste groove 321 after order changes. Moreover, at locations where the waste edge size suddenly increases, the oblique cutting knife 21 can create an oblique edge. This allows the waste edge to slide into the waste groove 321 along with the oblique edge without cutting the cardboard. On the one hand, the waste edge is less likely to clog; on the other hand, it allows the cardboard to maintain double-sided power conveying, ensuring the conveying accuracy of the cardboard.

[0040] Specifically, after the slitting machine in the previous process cuts the cardboard, the portion to be retained in the middle of the cardboard is separated from the waste edges on both sides. Before the waste edges enter the waste bin 321, the oblique cutting mechanism 2 helps guide the waste edges into the waste bin 321. The cardboard is continuously fed into the slitting blade by the production line, and the slitting and trimming waste recycling device can continuously recycle the waste edges. The oblique cutting mechanism 2 helps guide the waste edges into the waste bin 321 in two ways. The first way is to use the infeed and retracting blade mechanism to drive the oblique cutting to the position where the waste edge suddenly becomes larger, forming an oblique edge. This allows the waste edge to smoothly transition to the larger position during its entry into the waste bin 321, reducing the possibility of the waste edge clogging the waste bin 321. This method is particularly suitable for situations where the lateral dimension of the waste edge increases after changing orders. The second method is to use the cutting edge 211 of the cutting blade 21 to not contact the waste edge of the cardboard, and guide the waste edge through the cutting surface of the cutting blade 21. That is, after cutting, the waste edge is guided to the waste trough 321 by the obstruction of the cutting surface of the cutting blade 21.

[0041] In this embodiment, the cutting edge 21 of the trimming blade 21 is pointed, and the side of the cutting edge 211 facing the trimming groove 32 is beveled. This beveled edge guides the waste edge after cutting it, helping it enter the waste material groove 321. Furthermore, the side of the cutting edge 211 facing away from the trimming groove 32 is straight. The straight edge 211 does not exert a lateral inward pushing force on the cardboard when cutting the waste edge, effectively reducing cardboard deformation and misalignment.

[0042] The oblique cutting mechanism 2 also includes a pad block 23. The movable pad plate 31 has an installation groove on one side adjacent to the waste trough 321. One side of the installation groove communicates with the trimming groove 32. The pad block 23 is fixed within the installation groove and has a blade groove 231. When the cutting blade 21 is driven to swing downwards, its lower end extends into the blade groove 231. The pad block 23 is fixed within the installation groove, and one side communicates with the waste trough 321. Thus, when the lower end of the cutting blade 21 extends into the blade groove 231, after the waste edge is cut by the cutting blade 21, it can be guided along the blade surface of the cutting blade 21 to the waste trough 321. In this embodiment, the cutting blade 21 is a rotary cutter, and the rotation direction of the rotary cutter is opposite to the conveying direction of the cardboard, so that the cardboard is subjected to a downward force when it contacts the cutting blade 21, better ensuring that the waste edge can enter the waste trough 321.

[0043] The groove 231 on the blade support block 23 can limit the cutting blade 21 when it is driven to feed by the feed mechanism, improving the stability of the blade 211 in cutting the waste material and extending its service life. Furthermore, when the waste material is guided by the blade face of the cutting blade 21 and pushed towards it for cutting, the cutting blade 211 maintains operational stability under the limiting effect of the groove 231, thus stably guiding the waste material. Further, the rear side of the lower end of the cutting blade 21 is located above the opening of the waste material trough 321. This ensures that when the waste material contacts the cutting blade 21, the obliquely placed blade face of the cutting blade 21 and the rotational force of the cutting blade 21 guarantee that the waste material is stably guided to the opening of the waste material trough 321.

[0044] In this embodiment, the material of the blade pad 23 is plastic. The plastic material of the blade pad 23 allows it to form the cutting groove 231 through the cutting of the blade 211. After the cutting groove 231 is formed, the plastic material of the blade pad 23 prevents damage to the blade 211 even when it comes into contact with the blade pad 23. More specifically, the material of the blade pad 23 is nylon. Besides the ease of cutting by the blade 211, nylon also has self-lubricating properties, reducing friction between the blade 211 and the blade pad 23, reducing heat generation, reducing wear, and improving durability. Furthermore, the blade pad 23 is detachably connected to the movable pad 31. This detachable connection allows the blade pad 23 to be replaced when it is heavily worn. Alternatively, the shim block 23 can be removed, repositioned, and reinstalled with different orientations. The cutting blade 21 can then re-cut into the shim block 23 to form a new cutting groove 231, thus making fuller use of the shim block 23. Specifically, the shim block 23 is detachably connected to the movable pad 31 by bolts. This simplifies the detachable connection of the shim block 23.

[0045] Furthermore, the pad block 23 is provided with a screw hole 232, which is offset, meaning that the screw hole 232 does not fall at the center of the pad block 23. In this way, by assembling the pad block 23 in the forward or reverse direction, the cutting blade 21 can cut into different positions of the pad block 23 to form a cutting groove 231.

[0046] The cutting mechanism includes a linear actuator 51, a rotating shaft 52, and a swing arm 53. The linear actuator 51 includes a drive seat and a drive rod. The drive seat is hinged to the frame 1, and the drive rod is hinged to the swing arm 53. The swing arm 53 is driven by the rotating shaft 52, and the rotating shaft 52 is rotatably connected to the frame 1. The oblique cutting mechanism 2 also includes a blade holder 22, which is fixedly connected to the rotating shaft 52. The cutting blade 21 is obliquely mounted on the blade holder 22. When the linear actuator 51 is activated, the drive rod extends and retracts along the drive seat. The drive seat and drive rod are respectively hinged to the swing arm 53, causing the swing arm 53 to swing. Then, the rotating shaft 52 drives the blade holder 22 and the cutting blade 21 to swing, thereby realizing the cutting and retraction of the cutting blade 21. This structure simply and reliably realizes the cutting and retraction of the cutting blade 21.

[0047] In this embodiment, two sets of the oblique cutting mechanism 2 and the trimming groove 32 are provided, and the two sets of oblique cutting mechanism 2 and trimming groove 32 are symmetrically arranged on the left and right (horizontally) to match the waste board processing and recycling on both sides of the cardboard.

[0048] The transverse movement mechanism 4 includes a transverse slide rail 41, a first slide (not shown in the figure), a second slide 43, and an opposing movement structure. The transverse slide rail 41 is mounted on the frame 1. Both the first slide and the second slide 43 slide along the transverse slide rail 41. The two cutter holders 22 included in the two oblique cutting mechanisms 2 are respectively mounted on the first slide and the second slide 43. The opposing movement structure drives the first slide and the second slide 43 to move simultaneously towards or away from each other. The two cutter holders 22 are driven by the opposing movement structure through the first slide and the second slide 43. The two cutter holders 22 move simultaneously towards or away from each other, so that the center position between the two cutter holders 22 remains unchanged, so as to keep the position of the machine tool aligned with the back and forth of orders of different sizes.

[0049] The opposing movement structure includes a drive motor 44, a drive wheel (not shown in the figure), a first transmission bar 46, and a second transmission bar 47. The drive motor 44 is mounted on the frame 1 and is driven by the drive wheel. The first transmission bar 46 and the second transmission bar 47 are fixedly connected to the first slide and the second slide 43, respectively. The first transmission bar 46 and the second transmission bar 47 abut against the drive wheel on both sides of the drive wheel. The structure of the drive motor 44, drive wheel, first transmission bar 46, and second transmission bar 47 achieves simultaneous opposing and reversible movement, which is simple and reliable.

[0050] The drive wheel is a gear, and the first transmission bar 46 and the second transmission bar 47 are both racks. Thus, the drive wheel, the first transmission bar 46, and the second transmission bar 47 transmit power through gear meshing, resulting in high transmission efficiency, no slippage, and reliable transmission.

[0051] In this embodiment, the longitudinal cutting and trimming waste recycling device is installed at the end of the longitudinal cutting machine, and the frame 1 of the longitudinal cutting machine can only provide support on one side. In addition, since the oblique cutting mechanism 2 and the trimming groove 32 need to recycle the waste plates cut off on both sides, the oblique cutting mechanism 2 and the trimming groove 32 need to be set on both sides along the transverse direction. The oblique cutting mechanism 2 includes heavy parts such as motors, so the weight support structure of the oblique cutting mechanism 2 is particularly important. Otherwise, the service life may be short due to the one-sided support and weight offset structure of the oblique cutting mechanism 2.

[0052] In this embodiment, the cutter holder 22 is located on the side of the trimming groove 32 away from the movable pad 31. The transverse movement mechanism 4 also includes a transverse slide bar 48. The transverse slide bar 48 and the transverse movement slide rail 41 are both located in front of the cutter holder 22. The trimming groove 32 is also provided with a front roller 491 and a rear roller 492. The front roller 491 and the rear roller 492 are located on the front side and the rear side of the transverse slide bar 48, respectively. The front roller 491 and / or the rear roller 492 roll on the transverse slide bar 48. Taking the oblique cutting mechanism 2 mounted on the first slide as an example, the cutter holder 22 and the trimming groove 32 of the oblique cutting mechanism 2 are supported by the transverse slide rail 41 and the first slide. The arrangement of the front roller 491, the rear roller 492, and the transverse slide bar 48 restricts the forward and backward tilting of the cutter holder 22 and the trimming groove 32. At the same time, the front roller 491 and the rear roller 492 do not obstruct the sliding of the cutter holder 22. Generally speaking, one of the front roller 491 and the rear roller 492 abuts against the transverse slide rail 41, while the other plays a limiting role. Taking this embodiment as an example, the trimming motor 24 is installed behind the front roller 491 and the rear roller 492. Under normal conditions, the front roller 491 abuts against the transverse slide rail 41 and supports the cutter holder 22, while the rear roller 492 limits the vibration generated by the trimming motor 24 during operation, preventing the cutter holder 22 from swinging too much due to vibration. Furthermore, due to the inherent gaps in the structure of the front roller 491 and the rear roller 492, the vibrations of the front roller 491 and the rear roller 492 themselves can also act as dampers when the trimming motor 24 is working, reducing the overall vibration of the cutter holder 22. The front roller 491, the rear roller 492, and the transverse slide bar 48, together with the transverse slide rail 41 and the cutter holder 22, form a stable support structure, greatly improving the service life of the longitudinal trimming waste recycling device.

[0053] The preferred embodiments of the present invention have been described in detail above, but the present invention is not limited to the embodiments described. Those skilled in the art can make various equivalent modifications or substitutions without departing from the spirit of the present invention, and these equivalent modifications or substitutions are all included within the scope defined by the claims of the present invention.

Claims

1. A slitting and edging waste recovery apparatus, characterized by: include: The machine consists of a frame (1), a transverse movement mechanism (4), a cutting advance / retract mechanism, a beveling mechanism (2), a trimming groove (32), and a movable pad (31). The transverse movement mechanism (4) is mounted on the frame (1). The cutting advance / retract mechanism, the trimming groove (32), and the movable pad (31) are all mounted on the transverse movement mechanism (4). The output end of the cutting advance / retract mechanism is connected to the beveling mechanism (2). The movable pad (31) is positioned opposite to the trimming groove (32). The oblique cutting mechanism (2) is connected to one side. The trimming groove (32) includes a waste groove (321) with the opening facing forward. The oblique cutting mechanism (2) includes a cutting blade (21) that is inclined relative to the opening direction of the waste groove (321). The rear side of the cutting blade (21) tends to the waste groove (321). At the position where the waste edge size suddenly increases, the oblique cutting blade (21) cuts to form an oblique edge. The waste edge can slide into the waste groove (321) along with the oblique edge. After cutting, the blade (211) of the cutting knife (21) does not contact the waste edge of the cardboard, and the waste edge is guided to the waste trough (321) by the obstruction of the blade surface of the cutting knife (21). The cutting blade (21) includes a blade (211), which is pointed. The side of the blade (211) facing the trimming groove (32) is a bevel. The side of the blade (211) facing away from the trimming groove (32) is a straight edge. The straight edge blade (211) does not generate a lateral inward pushing force on the cardboard when cutting the waste edge. The oblique cutting mechanism (2) also includes a pad block (23). The movable pad plate (31) has an installation groove on one side adjacent to the waste trough (321). One side of the installation groove is connected to the trimming groove (32). The pad block (23) is fixed in the installation groove. The pad block (23) has a knife groove (231). When the cutting knife (21) is driven to swing downward, the lower end of the cutting knife (21) extends into the knife groove (231). The cutting knife (21) is limited by the knife groove (231). The cutting knife (21) is a rotary cutter. The rotation direction of the rotary cutter is opposite to the conveying direction of the paperboard. When the paperboard comes into contact with the cutting knife (21), it is subjected to a downward force. The rear side of the lower end of the cutting blade (21) is located above the opening of the waste trough (321).

2. The slitting and trimming waste recovery apparatus of claim 1, wherein: The advance and retraction mechanism includes a linear driver (51), a rotating shaft (52), and a swing arm (53). The linear driver (51) includes a drive seat and a drive rod. The drive seat is hinged to the frame (1). The drive rod is hinged to the swing arm (53). The swing arm (53) is driven to the rotating shaft (52). The rotating shaft (52) is rotatably connected to the frame (1). The oblique cutting mechanism (2) also includes a knife holder (22). The knife holder (22) is fixed to the rotating shaft (52). The cutting blade (21) is obliquely arranged on the knife holder (22).

3. The slitting and trimming waste recovery apparatus of claim 2, wherein: The transverse mechanism (4) includes a transverse slide rail (41), a first slide block, a second slide block (43), and a moving structure in opposite directions. The transverse slide rail (41) is mounted on the frame (1). The first slide block and the second slide block (43) slide along the transverse slide rail (41). The cutter holders (22) included in the two oblique cutting mechanisms (2) are respectively mounted on the first slide block and the second slide block (43). The moving structure in opposite directions drives the first slide block and the second slide block (43) to move in opposite directions or away from each other at the same time.

4. The slitting and trimming waste recovery apparatus of claim 3, wherein: The opposing moving structure includes a drive motor (44), a drive wheel, a first transmission bar (46) and a second transmission bar (47). The drive motor (44) is mounted on the frame (1). The drive motor (44) is driven to drive the drive wheel. The first transmission bar (46) and the second transmission bar (47) are fixed to the first slide and the second slide (43) respectively. The first transmission bar (46) and the second transmission bar (47) abut against the drive wheel on both sides of the drive wheel respectively.

5. The slitting and trimming waste recovery apparatus of claim 3, wherein: The cutter holder (22) is located on the side of the trimming groove (32) away from the movable pad (31). The transverse movement mechanism (4) also includes a transverse slide bar (48). The transverse slide bar (48) and the transverse slide rail (41) are both located in front of the cutter holder (22). The trimming groove (32) is also provided with a front roller (491) and a rear roller (492). The front roller (491) and the rear roller (492) are located on the front and rear sides of the transverse slide bar (48), respectively. The front roller (491) and / or the rear roller (492) roll on the transverse slide bar (48).

6. The slitting and trimming waste recovery apparatus of claim 1, wherein: The material used for the pad block (23) is plastic.

7. The slitting and trimming waste recovery apparatus of claim 6, wherein: The material used for the pad block (23) is nylon.

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