Automatic waste discharge mechanism for paperboard die cutting

Abstract

The automatic waste discharge mechanism for paperboard die cutting comprises a rack, a portal frame and a roller conveying structure used for conveying paperboards are arranged on the rack, and the portal frame is arranged above the roller conveying structure and stretches across the roller conveying structure; a lifting assembly is arranged on the portal frame, and the lower end of the lifting assembly is fixedly connected with an ejection assembly used for ejecting scraps through a mounting assembly; wherein in the downward moving process of the lifting assembly, the ejection assembly passes through a triggering assembly arranged on the rack, the ejection end on the lifting assembly is compressed under the action of the triggering assembly till the ejection end is compressed to the limit, then constraint is relieved, the ejection end is bounced to the area where the sweeps are located, and therefore ejection of the sweeps is achieved. Compared with a traditional continuous downward pressing or rigid ejection waste discharge structure, according to the scheme, large instantaneous acting force is formed in a waste chip area through striking type instantaneous release, the problems that after die cutting is conducted on a thick paperboard or a multi-layer composite paperboard, waste chip connection is strong, and waste is prone to being stuck can be effectively solved, and the waste discharge success rate and consistency are remarkably improved.

Description

Technical Field

[0001] This invention relates to the field of waste removal after cardboard die-cutting, specifically to an automatic waste removal mechanism for cardboard die-cutting. Background Technology

[0002] Flatbed die-cutting (also known as flat template die-cutting) is a common die-cutting method used in packaging paperboard processing. It involves the relative movement between upper and lower flat templates, which causes the die-cutting blade to cut and crease the paperboard under instantaneous pressure. Due to its wide range of applicable paperboard specifications, high die-cutting precision, and strong structural adaptability, flatbed die-cutting is widely used in die-cutting processes for thick paperboard, heavy-weight paperboard, and multi-layer composite paperboard.

[0003] In flatbed die-cutting, the cardboard is usually stationary or intermittently conveyed after die-cutting, and the waste board is still connected to the finished product area through partially unbroken fibers or indentations. Especially when processing thick or high-rigidity cardboard, due to factors such as die-cutting depth control, cardboard springback, and a large number of fiber layers, the connection strength between the waste board and the finished product area is relatively high, which can easily cause waste jamming during subsequent waste removal.

[0004] The waste removal methods commonly used in existing flatbed die-cutting equipment are mostly pressure-type or ejector-type structures. That is, the waste removal mechanism applies continuous downward pressure or rigid ejection force to the waste area, causing the waste board to detach from the finished product area. However, in flatbed die-cutting scenarios, the cardboard is usually supported as a whole on the waste removal area. If continuous downward pressure is applied, the force can easily be transferred to the finished product area, resulting in the collapse of the thick cardboard edges, deepening of indentations, or local structural deformation, affecting the appearance and structural strength of the finished product.

[0005] Furthermore, simply increasing the downward stroke or ejection stiffness to overcome the connection resistance of thick cardboard waste will not only exacerbate the risk of squeezing the finished product area, but may also lead to inconsistent waste removal effects due to unstable release of waste removal force, making it difficult to balance the requirements of thorough waste removal and finished product protection.

[0006] Therefore, in the field of waste removal in flatbed die-cutting, especially in the application scenarios of thick cardboard or multi-layer composite cardboard, there is an urgent need for a waste removal technology solution that can adapt to the characteristics of flatbed die-cutting process, apply effective force to the waste area while ensuring that the finished product area is not continuously squeezed, and improve the consistency and reliability of waste removal. Summary of the Invention

[0007] In order to solve the problem that existing flatbed die-cutting equipment mostly adopts continuous downward pressure or rigid ejection waste removal methods, which easily transmit the waste removal force to the finished product area when processing thick cardboard or multi-layer composite cardboard, causing edge collapse, indentation deepening or local deformation, and insufficient waste removal stability, this invention provides an automatic waste removal mechanism for cardboard die-cutting.

[0008] The present invention solves the above-mentioned technical problems through the following technical solutions: The present invention provides an automatic waste removal mechanism for cardboard die cutting, including a frame, a gantry frame and a roller conveyor structure for conveying cardboard on the frame, the gantry frame being disposed above the roller conveyor structure and spanning the roller conveyor structure; The gantry is equipped with a lifting assembly, and the lower end of the lifting assembly is fixedly connected to an ejection assembly for ejecting waste chips via an installation assembly. During the downward movement of the lifting assembly, the ejector assembly passes through the trigger assembly set on the frame. Under the action of the trigger assembly, the ejector end on the lifting assembly is compressed until the ejector end is compressed to the limit, after which the constraint is released and it bounces towards the area where the waste is located, so as to realize the ejection of the waste.

[0009] Compared to traditional continuous downward pressure or rigid ejection waste removal structures, this solution uses an impact-type instantaneous release to create a large instantaneous force in the waste area, which can effectively overcome the problem of strong waste adhesion and easy waste jamming after die-cutting of thick cardboard or multi-layer composite cardboard, and significantly improve the success rate and consistency of waste removal.

[0010] Meanwhile, this controlled release method avoids applying continuous pressure to the finished product area, which helps reduce the risk of edge collapse and structural deformation of thick cardboard and broadens the applicability of the equipment to different cardboard thicknesses and materials.

[0011] In this technical solution, the roller conveyor structure includes multiple transmission rollers that are equally spaced on the top surface of the frame. Each transmission roller has two symmetrically arranged annular grooves. A transmission belt is fitted into the annular grooves of the transmission rollers located at the two side edges. The transmission belt is provided with multiple positioning blocks that are equally spaced along its length, and the positioning blocks protrude from the outer edge surface of the corresponding transmission roller. A limiting space is formed between two adjacent positioning blocks to place the cardboard, thereby fixing and positioning the cardboard.

[0012] Preferably, the coverage area of ​​the machine body and roller conveyor structure can be appropriately expanded, extending the roller conveyor structure to cover the die-cutting area. With this structural design, the cardboard is constrained and positioned by the limiting space formed between two adjacent positioning blocks when entering the die-cutting process, and continues to maintain the same positioning state after die-cutting before entering the waste removal process. This achieves unified positioning between the die-cutting and waste removal processes, preventing cardboard shifting during process switching and improving the overall accuracy and stability of die-cutting and waste removal.

[0013] The lifting assembly includes a support frame, which is fixed on the gantry frame, and a drive component is fixed at the bottom of the support frame. The lifting end of the drive component is fixed to the fixed frame. An ejector assembly is mounted on the mounting bracket via an installation component.

[0014] The drive component is preferably a hydraulic rod or an electric actuator. The end of the hydraulic rod or electric actuator is a lifting end, and the extension or retraction of the hydraulic rod or electric actuator drives the mounting assembly and the ejection assembly to rise and fall.

[0015] The mounting assembly includes two symmetrically arranged second guide rails, which are fixedly mounted on the mounting frame, and the extension direction of the second guide rails is parallel to the movement direction of the cardboard. At least one first guide rail is slidably connected between the two second guide rails, and at least one ejector component is slidably connected on the first guide rail. Fixing components are provided at the sliding connection between the second guide rail and the first guide rail, and at the sliding connection between the ejection assembly and the first guide rail, to lock the position of the corresponding components. The ejector component and the trigger component are set up in a one-to-one correspondence. The trigger component is installed on the gantry or rack through the positioning component.

[0016] The fixed frame includes a rectangular frame, which is fixed to the lifting end of the drive unit by two symmetrically arranged "L"-shaped first rods, and two second guide rails are respectively fixed to the side walls of the two opposite sides of the frame.

[0017] The lifting assembly drives the installation assembly to rise and fall via the fixed frame, thereby driving the ejector assembly to rise and fall.

[0018] The first guide rail is fixed at both ends with a second slider, and the two second sliders are slidably connected to the two second guide rails respectively. The second sliders are provided with fixing parts. The first guide rail is connected to the ejector assembly via the first slider.

[0019] The first slider is also equipped with a fixing component.

[0020] The ejection assembly includes a telescopic mounting rod, which is vertically fixed to the lower end of the first slider. A spring is sleeved on the outer periphery of the mounting rod, and the lower end of the mounting rod is fixedly connected to the center of the top surface of the support plate. The support plate is provided with an ejector section, the ejector section has an adjustable ejector area, and the lower end of the ejector section protrudes from the bottom of the support plate; The carrier plate is also equipped with a transmission part, which is used for transmission connection with the triggering component.

[0021] The elastic potential energy of the ejection is stored through the retractable mounting rod and the spring on the surface of the mounting rod.

[0022] The transmission unit includes two opposing columns, which are fixedly mounted on an extension plate on the outer wall of the bearing plate; Each column is rotatably connected to the top of an overlapping plate. A coil spring is installed at the rotatable connection between the overlapping plate and the corresponding column. The two ends of the coil spring are fixedly connected to the overlapping plate and the column, respectively. When no external force is applied, the coil spring is used to keep the overlapping plate in a horizontal position.

[0023] The ejector portion includes at least two ejector members that are slidably connected to a sliding groove on the support plate, and the sliding groove extends from the edge of the support plate to the center of the support plate.

[0024] The ejector includes a movable slider that is slidably connected to a corresponding sliding slot. The bottom of the movable slider is fixed with a vertically distributed push rod, and the top of the movable slider is fixed with a limiting member that abuts against the bearing plate. The ejector and the sliding slot correspond one-to-one.

[0025] Specifically, the support plate has a rectangular or circular structure.

[0026] The triggering component includes a second directional slider, which is slidably connected to the connecting part. On both outer walls of the second directional slider, there are vertical connecting rods fixed along the vertical direction by second rods with an "L"-shaped structure. At the bottom end of the connecting rods, there is a triggering horizontal plate that can overlap with the overlapping plate.

[0027] The connecting part includes two symmetrically arranged mounting brackets, which are fixed on the gantry frame. Each mounting bracket is fixed with a first directional guide rail. The two first directional guide rails are arranged parallel to each other and parallel to the direction of movement of the cardboard. The second directional guide rail has first directional sliders fixed at both ends, and the two first directional sliders are slidably connected to the two first directional guide rails respectively. The second directional slider is slidably connected to the second directional guide rail, and both the first and second directional sliders are provided with fixing parts.

[0028] By sliding the second directional guide rail on the first directional guide rail, the position of the trigger component in the vertical direction is adjusted. By sliding the second directional slider on the second directional guide rail, the position of the trigger component in the horizontal direction is adjusted, so that the position of the trigger component corresponds one-to-one with the position of the ejector component.

[0029] The second directional guide rail and the first guide rail are on the same vertical plane, and during use, the orthographic projections of the second directional slider and the first slider in the vertical direction coincide.

[0030] According to the present invention, at least the following beneficial effects are achieved: During the waste removal process, the ejector assembly moves downwards synchronously with the lifting assembly. When the ejector assembly passes the trigger assembly, its ejector end is temporarily constrained and gradually compressed under the action of the trigger assembly, thus accumulating energy during the downward movement. When the ejector end is compressed to a predetermined limit position, the constraint is released, causing the ejector end to be released instantaneously and bounce towards the waste area on the cardboard, forming an impact ejection action on the waste board.

[0031] Compared to traditional continuous downward pressure or rigid ejection waste removal structures, this solution can apply a large instantaneous force to the waste area in a very short time through the above-described working method, making it particularly suitable for waste removal scenarios involving thick cardboard or multi-layer composite cardboard. Because thick cardboard has a high connection strength between the waste board and the finished product area after die-cutting, and is more prone to waste jamming due to the large number of fiber layers and high indentation rebound, this solution effectively disrupts this connection through impact-based release, significantly improving the success rate and consistency of waste removal under thick cardboard conditions.

[0032] Meanwhile, the ejector end is in a controlled compression state before release, which can avoid applying long-term squeezing pressure to the finished area of ​​the thick cardboard, reducing the risk of edge collapse, excessively deep indentations or local deformation. This is beneficial for maintaining the shape quality and overall structural strength of the finished product when processing heavy-weight, high-rigidity cardboard, thereby expanding the equipment's applicability to different cardboard thicknesses and materials. Attached Figure Description

[0033] Figure 1 This is a schematic diagram illustrating the external structure of an automatic waste removal mechanism for cardboard die-cutting according to a specific embodiment of the present invention; Figure 2 for Figure 1 A magnified schematic diagram of the local structure at point I; Figure 3 This is a bottom view of an automatic waste removal mechanism for cardboard die-cutting according to a specific embodiment of the present invention. Figure 4 This is a schematic diagram illustrating the structure of the gantry, lifting assembly, mounting assembly, and ejection assembly of an automatic waste removal mechanism for cardboard die-cutting according to a specific embodiment of the present invention. Figure 5 for Figure 4 A magnified schematic diagram of the structure at point J; Figure 6 This is a bottom view of the gantry, lifting assembly, mounting assembly, and ejection assembly of an automatic waste removal mechanism for cardboard die-cutting according to a specific embodiment of the present invention. Figure 7 for Figure 6 A magnified schematic diagram of the structure at point K; Figure 8This is a schematic diagram illustrating the installation components, triggering components, and ejection components of an automatic waste removal mechanism for cardboard die-cutting according to a specific embodiment of the present invention. Figure 9 for Figure 8 A magnified schematic diagram of the structure at point L; Figure 10 This is a schematic diagram illustrating the structure of the triggering component and the ejection component of the automatic waste removal mechanism for cardboard die-cutting according to a specific embodiment of the present invention; Figure 11 This is a front view schematic diagram of the triggering component and ejection component of an automatic waste removal mechanism for cardboard die-cutting according to a specific embodiment of the present invention. Figure 12 The diagram shows a bottom view of the triggering component and ejection component of an automatic waste removal mechanism for cardboard die-cutting according to a specific embodiment of the present invention.

[0034] Explanation of reference numerals in the attached figures 1. Rack; 2. Conveyor rollers; 3. Transmission belt; 31. Positioning block; 4. Gantry frame; 41. Mounting bracket; 42. First directional guide rail; 43. First directional slider; 44. Second directional guide rail; 5. Lifting assembly; 51. Support frame; 52. Drive unit; 53. Fixing frame; 6. Install components; 61. First guide rail; 62. Second guide rail; 63. Second slider; 7. Ejector assembly; 71. Support plate; 711. Sliding groove; 72. Mounting rod; 73. First slider; 74. Moving slider; 741. Ejector rod; 75. Limiting component; 76. Column; 761. Overlap plate; 8. Trigger component; 81. Connecting vertical rod; 82. Second directional slider; 83. Trigger horizontal plate; 9. Fastener; 91. Fixing plate; 92. Threaded sleeve; 93. Threaded rod; 94. Handwheel. Detailed Implementation

[0035] The present invention will be further described below with reference to the accompanying drawings and embodiments. However, this description is exemplary and does not limit the present invention to the scope of the embodiments.

[0036] like Figure 1As shown, the automatic waste removal mechanism for cardboard die-cutting in this embodiment of the invention includes a frame 1, a gantry frame 4 and a roller conveying structure for conveying cardboard on the frame 1. The gantry frame 4 is positioned above the roller conveying structure and spans across the roller conveying structure. A lifting assembly 5 is provided on the gantry frame 4. The lower end of the lifting assembly 5 is fixedly connected to an ejection assembly 7 for ejecting waste chips via an installation assembly 6. During the downward movement of the lifting assembly 5, the ejection assembly 7 passes through a trigger assembly 8 located on the frame 1. Under the action of the trigger assembly 8, the ejection end on the lifting assembly 5 is compressed until it reaches its limit, after which the constraint is released and it springs towards the area where the waste chips are located, thereby realizing the ejection of waste chips.

[0037] The roller conveyor structure includes multiple transmission rollers 2 evenly spaced on the top surface of the frame 1. Each transmission roller 2 has two symmetrically arranged annular grooves. A transmission belt 3 is fitted into the annular grooves of the transmission rollers 2 located at the two side edges. The transmission belt 3 is provided with multiple positioning blocks 31 evenly spaced along its length. The positioning blocks 31 protrude from the outer edge surface of the corresponding transmission roller 2. A limiting space for placing cardboard is formed between two adjacent positioning blocks 31 to fix and position the cardboard.

[0038] Preferably, the coverage area of ​​the machine body and roller conveyor structure can be appropriately expanded, extending the roller conveyor structure to cover the die-cutting area. With this structural design, the cardboard is constrained and positioned by the limiting space formed between two adjacent positioning blocks 31 when entering the die-cutting process, and continues to maintain the same positioning state after die-cutting before entering the waste removal process. This achieves unified positioning between the die-cutting and waste removal processes, preventing cardboard shifting during process switching and improving the overall accuracy and stability of die-cutting and waste removal.

[0039] In the roller conveyor structure, multiple conveying rollers are driven by a drive structure in the prior art, enabling each conveying roller to rotate synchronously. During the waste discharge process, the waste debris ejected by the ejector component 7 can be directly discharged downward through the gap formed between two adjacent conveying rollers, thereby avoiding the accumulation of waste debris on the conveying path and helping to maintain the continuity and stability of the conveying and waste discharge process.

[0040] As a prior art driving structure for driving roller conveyor structures, its driving methods include, but are not limited to, the following: Chain drive structure The synchronous rotation of multiple conveyor rollers is achieved by driving the active sprocket with a motor, which then meshes with multiple driven sprockets via a chain.

[0041] Synchronous belt drive structure The synchronous belt and synchronous pulley drive system ensures that each conveyor roller rotates at the same speed, resulting in smooth operation and low noise.

[0042] Gear transmission structure Meshing gears are installed between adjacent conveyor rollers to achieve multi-roller linkage through gear transmission, resulting in a compact structure and good synchronization.

[0043] Friction wheel or rubber-coated drive method Power is transmitted through frictional contact between the drive roller and other conveying rollers, making it suitable for light-load or simplified conveying applications.

[0044] Independent motor + coupling drive method Each conveyor roller or group of conveyor rollers is equipped with a motor, which is connected by a coupling to achieve drive, facilitating zoned control.

[0045] like Figure 4 As shown, the lifting assembly 5 includes a support frame 51, which is fixed on the gantry frame 4, and a drive component 52 is fixed at the bottom of the support frame 51. The lifting end of the drive component 52 is fixed to the fixed frame 53. An ejection assembly 7 is installed on the fixed frame 53 through the mounting assembly 6.

[0046] The drive component 52 is preferably a hydraulic rod or an electric push rod. The end of the hydraulic rod or electric push rod is a lifting end, and the extension or retraction of the hydraulic rod or electric push rod drives the mounting assembly 6 and the ejection assembly 7 to rise and fall.

[0047] like Figure 8 As shown, the mounting component 6 includes two symmetrically arranged second guide rails 62, which are fixedly mounted on the fixing frame 53, and the extension direction of the second guide rails 62 is parallel to the movement direction of the cardboard; at least one first guide rail 61 is slidably connected between the two second guide rails 62, and at least one ejector component 7 is slidably connected on the first guide rail 61; fixing members 9 are provided at the sliding connection between the second guide rail 62 and the first guide rail 61 and at the sliding connection between the ejector component 7 and the first guide rail 61, for locking the position of the corresponding components; the ejector component 7 and the trigger component 8 are arranged one-to-one, and the trigger component 8 is mounted on the gantry 4 or the frame 1 through the positioning component.

[0048] The first guide rail 61 slides between the two second guide rails 62, thereby adjusting the longitudinal position of the ejector assembly 7. The transverse position of the ejector assembly 7 is adjusted by sliding it on the first guide rail 61. By adjusting the vertical and transverse positions of the ejector assembly 7, it corresponds to the desired waste removal location on the cardboard.

[0049] Multiple first guide rails 61 can be placed on two second guide rails 62, and multiple second ejection components 7 can be placed on the first guide rails 61, so that waste from multiple areas on a single cardboard can be ejected simultaneously.

[0050] Preferably, a scale is set along the length of the second guide rail 62 and the first guide rail 61, so that the coordinates of the ejector component 7 can be clearly defined, making it easier to correspond to the area on the cardboard where waste needs to be discharged.

[0051] like Figure 6 , Figure 7 and Figure 8 As shown, the fixing frame 53 includes a rectangular frame, which is fixed to the lifting end of the drive unit 52 by two symmetrically arranged "L"-shaped first rods, and two second guide rails 62 are respectively fixed to the side walls of the two opposite sides of the frame.

[0052] The lifting component 5 drives the installation component 6 to rise and fall through the fixed frame 53, thereby driving the ejection component 7 to rise and fall.

[0053] Both ends of the first guide rail 61 are fixed with second sliders 63, and the two second sliders 63 are slidably connected to the two second guide rails 62 respectively. The second sliders 63 are provided with fixing parts 9. The first guide rail 61 is connected to the ejector assembly 7 through the first slider 73, and the first slider 73 is slidably connected to the first guide rail 61. The first slider 73 is also provided with fixing parts 9.

[0054] like Figures 10-12 As shown, the ejector assembly 7 includes a telescopically mounted rod 72, which is vertically fixed to the lower end of the first slider 73. A spring is sleeved on the outer periphery of the mounting rod 72, and the lower end of the mounting rod 72 is fixedly connected to the center position of the top surface of the support plate 71. The support plate 71 is provided with an ejector portion, the ejector action area of ​​which is adjustable, and the lower end of the ejector portion protrudes from the bottom of the support plate 71. The support plate 71 is also provided with a transmission portion, which is used for transmission connection with the trigger assembly 8.

[0055] The elastic potential energy of the ejection is stored by the retractable mounting rod 72 and the spring on the surface of the mounting rod 72.

[0056] The transmission unit includes two opposing columns 76, which are fixedly mounted on the extension plate of the outer wall of the bearing plate 71. Each column 76 has a rotatable connecting plate 761 at its top. A coil spring is provided at the rotatable connection between the rotatable connecting plate 761 and the corresponding column 76. The two ends of the coil spring are fixedly connected to the rotatable connecting plate 761 and the column 76, respectively. When no external force is applied, the coil spring keeps the rotatable connecting plate 761 in a horizontal position.

[0057] The ejector portion includes at least two ejector members that are slidably connected to a sliding groove 711 on the support plate 71, and the sliding groove 711 extends from the edge of the support plate to the center of the support plate 71.

[0058] The ejector includes a movable slider 74, which is slidably connected to the corresponding sliding groove 711. The bottom end of the movable slider 74 is fixed with a vertically distributed push rod 741, and the top of the movable slider 74 is fixed with a limiting member 75 that abuts against the bearing plate 71. The ejector and the sliding groove 711 correspond one-to-one.

[0059] Specifically, the support plate 71 has a rectangular or circular structure.

[0060] In one aspect, when the support plate 71 is rectangular, there are four ejector parts and four sliding grooves 711. The four sliding grooves are located on the connecting lines between the four corners of the support plate 71, and the connecting lines pass through the center of the support plate 71.

[0061] On the other hand, when the support plate 71 is circular, there are at least three ejector pieces and three sliding through slots 711, and the sliding through slots 711 are arranged radially along the support plate 71.

[0062] The sliding groove 711 is the sliding trajectory of the movable slider 74. By moving the slider 74 on the sliding groove 711, the distance between the ejector rods 741 on the ejector is changed, thereby changing the area of ​​the ejection action area enclosed by the ejector rods 741.

[0063] The push rod 741 is the push-out end of the trigger assembly 7.

[0064] The top and bottom of the movable slider 74 are fixed with ear plates, which are slidably connected to the top and bottom side walls of the support plate 71, respectively.

[0065] The movable slider 74 is clamped onto the support plate 71 by the top and bottom ear plates.

[0066] The limiting member 75 includes a sleeve, which is fixed vertically to an ear plate located at the top of the bearing plate 71. A screw is threaded inside the sleeve, which passes through the ear plate and overlaps with the top side wall of the bearing plate 71.

[0067] By rotating the screw, the screw is pressed tightly against the support plate 71, thereby fixing the movable slider 74, whose position has been adjusted, onto the support plate 71.

[0068] like Figures 8-12 As shown, the trigger component 8 includes a second directional slider 82, which is slidably connected to the connecting part. Both sides of the outer wall of the second directional slider 82 are fixed with vertical connecting rods 81 arranged vertically by second rods of "L" shape structure. The bottom end of the connecting rods 81 is fixed with a trigger horizontal plate 83 that can overlap with the overlapping plate 761.

[0069] During the descent of the ejector assembly 7, after the overlapping plate 761 on the ejector assembly 7 overlaps with the trigger cross plate 83, the bearing plate 71 is blocked and does not descend synchronously with the mounting assembly 6. At this time, the ejector assembly 7 is located above the required waste removal area, and the mounting rod 72 shortens, the spring is compressed, and elastic potential energy is accumulated.

[0070] The lifting end of the lifting assembly 5 continuously pushes the mounting assembly 6 downwards until the coil spring at the connection between the overlapping plate 761 and the column 76 deforms, causing the overlapping plate 761 to rotate upwards. When the overlapping plate 761 disengages from the trigger plate 83 during rotation, it returns to its original position under the action of the coil spring. The compressed spring causes the mounting rod 72 to extend, ejecting the ejector on the bearing plate 71 downwards. The ejected ejector directly pushes the waste chips off the cardboard or completely breaks the connection between the waste chips and the cardboard, thus achieving waste removal.

[0071] The connecting part includes two symmetrically arranged mounting brackets 41, which are fixed to the gantry frame 4. Each mounting bracket 41 is fixed with a first directional guide rail 42, which are parallel to each other and parallel to the direction of movement of the cardboard. A second directional guide rail 44 is provided, with first directional sliders 43 fixed at both ends. The two first directional sliders 43 are slidably connected to the two first directional guide rails 42 respectively. A second directional slider 82 is slidably connected to the second directional guide rail 44. Both the first directional sliders 43 and the second directional slider 82 are provided with fixing parts 9.

[0072] By sliding the second directional guide rail 44 on the first directional guide rail 42, the position of the trigger component 8 in the longitudinal direction is adjusted. By sliding the second directional slider 82 on the second directional guide rail 44, the position of the trigger component 8 in the transverse direction is adjusted, so that the position of the trigger component 8 corresponds one-to-one with the position of the ejector component 7.

[0073] The second directional guide rail 44 and the first guide rail 61 are on the same vertical plane, and during use, the orthographic projections of the second directional slider 82 and the first slider in the vertical direction coincide.

[0074] like Figure 5 and Figure 7 As shown, the fastener 9 includes a fixing plate 91, a threaded sleeve 92 is fixed on the fixing plate 91, a threaded rod 93 is inserted into the threaded sleeve 92, the threaded rod 93 and the threaded sleeve 92 are connected by threaded engagement, and the threaded rod 93 passes through the fixing plate 91.

[0075] The fixing plate 91 is fixed on the slider, and one end of the threaded rod 93 abuts against the guide rail. The other end of the threaded rod 93 is fixed with a handwheel 94. When the slider in this invention slides to the designated position on the guide rail, the threaded rod 93 is rotated by the handwheel 94, so that the threaded rod 93 moves to one side of the guide rail, thereby making the threaded rod 93 abut against the surface of the guide rail and fixing the slider at the corresponding position on the guide rail.

[0076] The sliders mentioned above are the first slider 73, the second slider 63, the first directional slider 43, and the second directional slider 82; the guide rails are the first guide rail 61, the second guide rail 62, the first directional guide rail 42, and the second directional guide rail 44.

[0077] The limiting component 75 and the fixing component 9 have the same structural principle, and both are fixed by threaded engagement.

[0078] The guide rails in this invention can all be fixedly connected in a detachable manner. The detachable connection structure can include a housing and a bolt. The housing is fixed at the position where the guide rail needs to be fixed. One side wall of the housing is open. The end of the guide rail is inserted into the housing through the open end of the housing. Then, a bolt is inserted, and the end of the bolt is screwed into the side wall of the housing and then extends into the end of the guide rail.

[0079] In summary, the present invention has been described in detail through specific embodiments. However, the present invention is not limited to the above embodiments. Those skilled in the art can make various changes or modifications to these embodiments without departing from the principles and essence of the present invention. Any changes in their shape or structure should fall within the protection scope of the present invention, which is defined by the appended claims.

Claims

1. An automatic waste removal mechanism for cardboard die cutting, comprising a frame (1), wherein a gantry (4) is provided on the frame (1) and a roller conveying structure for conveying cardboard, wherein the gantry (4) is disposed above the roller conveying structure and spans the roller conveying structure; The gantry frame (4) is equipped with a lifting assembly (5), and the lower end of the lifting assembly (5) is fixedly connected to an ejection assembly (7) for ejecting waste chips via an installation assembly (6). The characteristic feature is that: in, During the downward movement of the lifting assembly (5), the ejection assembly (7) passes through the trigger assembly (8) set on the frame (1). Under the action of the trigger assembly (8), the ejection end on the lifting assembly (5) is compressed until the ejection end is compressed to the limit and then the constraint is released and it bounces towards the area where the waste is located.

2. The automatic waste removal mechanism for cardboard die-cutting as described in claim 1, characterized in that: The roller conveying structure includes multiple transmission rollers (2) that are equally spaced on the top surface of the frame (1). Each transmission roller (2) has two symmetrically arranged annular grooves. The annular grooves of the transmission rollers (2) located at the two side edges are respectively fitted with transmission belts (3). The transmission belt (3) is provided with a plurality of positioning blocks (31) arranged at equal intervals along its length direction, and the positioning blocks (31) protrude from the outer edge surface of the corresponding transmission roller (2).

3. The automatic waste removal mechanism for cardboard die-cutting as described in claim 1, characterized in that: The lifting assembly (5) includes a support frame (51), which is fixed on the gantry frame (4), and a driving component (52) is fixed at the bottom of the support frame (51), with the lifting end of the driving component (52) fixed to the fixed frame (53). The mounting bracket (53) is equipped with an ejector assembly (7) via an installation assembly (6).

4. The automatic waste removal mechanism for cardboard die-cutting as described in claim 1, characterized in that: The mounting assembly (6) includes two symmetrically arranged second guide rails (62), which are fixedly mounted on the mounting bracket (53); At least one first guide rail (61) is slidably connected between the two second guide rails (62), and at least one ejector assembly (7) is slidably connected on the first guide rail (61). Fixing members (9) are provided at the sliding connection between the second guide rail (62) and the first guide rail (61) and at the sliding connection between the ejection assembly (7) and the first guide rail (61). The ejection component (7) and the trigger component (8) are configured in a one-to-one correspondence.

5. The automatic waste removal mechanism for cardboard die-cutting as described in claim 4, characterized in that: The ejection assembly (7) includes a telescopic mounting rod (72), which is fixedly connected to the lower end of the first slider (73). A spring is sleeved on the outer periphery of the mounting rod (72), and the lower end of the mounting rod (72) is fixedly connected to the top surface of the support plate (71). The support plate (71) is provided with an ejector portion, the ejector action area of ​​the ejector portion is adjustable, and the lower end of the ejector portion protrudes from the bottom of the support plate (71); The support plate (71) is also provided with a transmission part, which is used to drive the trigger assembly (8).

6. The automatic waste removal mechanism for cardboard die-cutting as described in claim 5, characterized in that: The transmission unit includes two opposing columns (76), which are fixedly mounted on the bearing plate (71); Each of the columns (76) is rotatably connected to the top of an overlapping plate (761), and a coil spring is provided at the rotatable connection between the overlapping plate (761) and the corresponding column (76).

7. The automatic waste removal mechanism for cardboard die-cutting as described in claim 5, characterized in that: The ejector portion includes at least two ejector members, which are slidably connected to a sliding groove (711) on the support plate (71), and the sliding groove (711) extends from the edge of the support plate to the center of the support plate (71).

8. The automatic waste removal mechanism for cardboard die-cutting as described in claim 7, characterized in that: The ejector includes a movable slider (74), which is slidably connected to a corresponding sliding groove (711). The bottom end of the movable slider (74) is fixed with a vertically distributed push rod (741), and the top of the movable slider (74) is fixed with a limiting member (75) that abuts against the bearing plate (71).

9. The automatic waste removal mechanism for cardboard die-cutting as described in claim 5, characterized in that: The triggering component (8) includes a second directional slider (82), which is slidably connected to the connecting part. Both sides of the outer wall of the second directional slider (82) are fixed with a vertically arranged connecting rod (81) by a second rod of an "L" shape structure. The bottom end of the connecting rod (81) is fixed with a triggering horizontal plate (83) that can overlap with the overlapping plate (761).

10. The automatic waste removal mechanism for cardboard die-cutting as described in claim 9, characterized in that: The connecting part includes two symmetrically arranged mounting brackets (41), which are fixed on the gantry frame (4). Each of the two mounting brackets (41) is fixed with a first directional guide rail (42). The two first directional guide rails (42) are arranged parallel to each other and parallel to the direction of movement of the cardboard. The second directional guide rail (44) has first directional sliders (43) fixed at both ends, and the two first directional sliders (43) are slidably connected to the two first directional guide rails (42) respectively. The second directional slider (82) is slidably connected to the second directional guide rail (44), and the first directional slider (43) and the second directional slider (82) are both provided with fixing parts (9).

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