A printing bristol board cutting machine

Abstract

The application discloses a printing copperplate paper cutting machine, which comprises a workbench and a portal frame arranged on the workbench; the portal frame is provided with a cutting driving element and a sliding cutting slider; the cutting slider is provided with a cutting tool and is also elastically and vertically installed with a pressing plate; the portal frame is provided with a clamping positioning mechanism, which comprises a clamping base, two clamping plates horizontally sliding oppositely and a driving plate elastically and horizontally sliding; the two clamping plates are in transmission cooperation with the driving plate; the cutting slider is provided with a locking assembly corresponding to the driving plate; a coupling transmission structure is arranged between the driving plate and the pressing plate; when the cutting slider drives the pressing plate to vertically move, the locking assembly can switch the locking state of the driving plate; the coupling transmission structure can convert the vertical movement of the pressing plate into the horizontal sliding of the driving plate, drives the two clamping plates to slide oppositely or away from each other, and completes the clamping and loosening of the paper stack; the application can realize the synchronous linkage of the cutting action and the lateral clamping, and improves the cutting stability and the machining precision.

Description

Technical Field

[0001] This invention relates to the field of cutting machine technology, and in particular to a cutting machine for printed coated paper. Background Technology

[0002] In the printing production process, coated paper that has completed the printing process needs to be cut to the required length according to the finished product size. The cutting accuracy directly affects the forming quality of the printed matter and its suitability for subsequent assembly and use. Existing coated paper cutting equipment generally adopts a positioning method using a pressure plate combined with fixed side baffles: during the cutting operation, the pressure plate applies vertical pressure to the paper stack from above to achieve clamping and positioning, while the fixed side baffles limit the sides of the paper, and finally the cutting blade completes the cutting process.

[0003] The existing positioning structure has the following problems in actual production: On the one hand, the coated paper has a smooth coating and a low coefficient of friction. When cutting thicker stacks of paper, the interlayer friction constraint between multiple layers of paper is insufficient. The lateral cutting force generated during the cutting process can easily cause relative slippage between the paper layers, resulting in offset cutting position and uneven cut edges, which directly reduces cutting accuracy and increases product defect rate. On the other hand, some cutting equipment with added lateral clamping structures are equipped with independent cylinders, motors and other drive units for the clamping mechanism. This not only significantly increases the structural complexity and manufacturing cost of the equipment, but also requires separate control logic to match the cutting action. The synchronization between clamping and cutting is difficult to guarantee accurately, and problems such as delayed or premature clamping are likely to occur. Moreover, it is impossible to adaptively adjust the clamping state according to the thickness of the paper stack. When cutting thin paper stacks, the excessive lateral clamping force can easily cause paper surface damage, limiting the applicable scenarios of the equipment.

[0004] Therefore, a cutting device is needed that can adapt to the positioning requirements of paper stacks of different thicknesses in order to improve the paper stability during the cutting process of coated paper and ensure the cutting accuracy. Summary of the Invention

[0005] The purpose of this invention is to overcome the above-mentioned shortcomings and provide a printing coated paper cutting machine.

[0006] To achieve the above objectives, the specific solution of the present invention is as follows: A printing coated paper cutting machine includes a worktable and a gantry frame disposed on the worktable; the gantry frame is provided with a cutting drive and a cutting slider is slidably disposed thereon, the cutting slider is connected to the output end of the cutting drive, the bottom of the cutting slider is provided with a cutting tool, and the cutting slider is also provided with a pressure plate that can be elastically raised and lowered. The gantry is provided with a clamping and positioning mechanism on at least one side. Each clamping and positioning mechanism includes a clamping seat fixed to the gantry, two clamping plates that are horizontally slidably disposed on the clamping seat, and a drive plate that is elastically horizontally slidably disposed in the middle of the clamping seat. Both clamping plates can be driven to cooperate with the drive plate. The drive plate is located on the side of the clamping seat facing the cutting slider. Each drive plate of the cutting slider is provided with a locking component. The locking component is configured to lock or release the drive plate when the pressure plate moves up and down with the cutting slider. A coupling transmission structure is provided between the drive plate and the pressure plate. The coupling transmission structure is configured to convert the lifting motion of the pressure plate into the horizontal sliding motion of the drive plate when the cutting slider drives the pressure plate to move up and down and the locking component releases the lock on the drive plate. The drive plate then synchronously drives the two clamping plates to slide towards or away from each other to clamp or release the stack of coated paper.

[0007] Furthermore, the coupling transmission structure includes a drive pin disposed at the bottom of the pressure plate and a slot opened at the bottom of the drive plate. The bottom of the slot is an inclined surface, and the drive pin can move into the slot and contact and cooperate with the inclined bottom surface of the slot.

[0008] Furthermore, the locking assembly includes a first locking block slidably hinged to the cutting slider, a second locking block fixed to the cutting slider and located above the first locking block, a transmission rod that moves vertically through the first locking block, and a first spring sleeved on the outer periphery of the transmission rod; the second locking block is L-shaped, and the bottom of the transmission rod remains in contact with the top surface of the pressure plate under the elastic force of the first spring; The drive plate is provided with a locking protrusion on the side facing the cutting slider for cooperating with the first locking block and the second locking block; the locking protrusion extends in the vertical direction. When the pressure plate causes the transmission rod to move upward relative to the first locking block against the elastic force of the first spring, the first spring applies a pushing force to the first locking block, causing the first locking block to produce horizontal and vertical displacements relative to the cutting slider, thereby releasing the restriction on the locking boss; when the second locking block moves downward until its horizontal arm contacts and engages with the locking boss, the second locking block maintains the restriction on the drive plate.

[0009] Furthermore, a spherical portion is provided at the bottom of the transmission rod, and the spherical portion is in movable contact with the top surface of the pressure plate.

[0010] Furthermore, the side wall of the cutting slider is provided with a groove, and the groove wall is provided with an inclined hole. The first locking block is movably disposed in the groove, and the side wall of the first locking block is provided with a guide pin, which is movably embedded in the corresponding inclined hole.

[0011] Furthermore, a driving ramp is provided on one side of the first locking block for cooperating with the locking boss. When the pressure plate slides horizontally against the elastic force through the coupling transmission structure, the locking boss can cooperate with the driving ramp to apply a horizontal thrust to the first locking block, causing the first locking block to drive the transmission rod to move relative to the cutting slider.

[0012] Furthermore, the cross-section of the transmission rod is square, and the first locking block has a square hole through which the transmission rod slides into the square hole.

[0013] Furthermore, a plurality of guide rods extending horizontally are provided on one side of the drive plate. The guide rods slide through the clamping seat and are connected to the inner wall of the clamping seat by a second spring coaxially arranged with the guide rods.

[0014] Furthermore, the clamping seat also has a first slider slidably disposed in the middle and a second slider slidably disposed on both sides of the first slider. The first slider has a first locking pin protruding on the side facing the drive plate. The drive plate has an inclined drive hole. The first locking pin is movably embedded in the drive hole. A connecting rod is disposed between the first slider and the two second sliders. The two ends of the connecting rod are respectively hinged to the first slider and the second slider. The clamping seat is provided with a drive rod corresponding to each of the two clamping plates. The end of the drive rod near the second slider is hinged to the inner wall of the clamping seat and can make movable contact with the side wall of the corresponding second slider. The end of the drive rod near the clamping plate is provided with a second locking pin. The clamping plate has a strip hole extending in the vertical direction, and the second locking pin is movably embedded in the corresponding strip hole.

[0015] Furthermore, each end of the cutting slider is provided with a guide shaft extending vertically downwards, and the end of the guide shaft is provided with a limiting platform. The two ends of the pressure plate are slidably sleeved on the outer peripheral wall of the corresponding guide shaft. A third spring is sleeved on the outer peripheral wall of each guide shaft. The two ends of the third spring abut against the pressure plate and the cutting slider respectively, so that the pressure plate is kept in movable contact with the limiting platform. The middle of the pressure plate is provided with a relief hole for avoiding the cutting tool.

[0016] The beneficial effects of this invention are as follows: By elastically lifting and lowering a pressure plate on the cutting slider and configuring a clamping and positioning mechanism including a clamping seat, two relatively sliding clamping plates, and an elastically sliding drive plate on at least one side of the gantry, this invention, in conjunction with a locking component and a coupling transmission structure, achieves synchronous linkage between the cutting action and the lateral clamping and positioning of the paper. During the cutting operation, the pressure plate moves down with the cutting slider and contacts the paper stack, generating relative lifting and lowering motion. When the locking component releases the lock on the drive plate, the coupling transmission structure can convert the vertical lifting and lowering motion of the pressure plate into the horizontal sliding of the drive plate, thereby driving the two clamping plates to slide towards each other, forming a clamping and positioning of the coated paper stack from the side. Without the need for an additional independent drive device, the paper clamping can be automatically completed with the cutting action, effectively resisting the lateral cutting force generated by the cutting tool during the cutting process, suppressing the relative slippage between coated paper layers and the offset of the cutting position, and significantly improving the cutting accuracy and operational stability of thick paper stacks.

[0017] Meanwhile, the locking component can automatically switch the locking and unlocking states of the drive plate as the pressure plate rises and falls, which can adapt to the positioning requirements of paper stacks of different thicknesses. In the cutting scenario of thin paper stacks, vertical clamping and positioning can be completed by the pressure plate alone, without triggering the lateral clamping action. The overall structure is compact and simple, which reduces the manufacturing cost and control complexity of the equipment and effectively broadens the application range and processing efficiency of the cutting equipment. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the cutting machine provided in an embodiment of the present invention when the clamping plate is in the open position; Figure 2 This is a schematic diagram of the cutting machine provided in an embodiment of the present invention when the clamping plate is in a clamping and positioning state; Figure 3 This is a schematic diagram of the cutting machine provided in an embodiment of the present invention from another perspective when the clamping plate is in a clamping and positioning position; Figure 4 This is a partial structural schematic diagram of the cutting machine provided in an embodiment of the present invention; Figure 5 yes Figure 4 A schematic diagram of the structure behind the hidden gantry frame; Figure 6 yes Figure 4 A schematic diagram of the structure when the gantry frame is hidden and the pressure plate and the cutting slider move relative to each other; Figure 7 yes Figure 6 A magnified view of a section at point A in the middle; Figure 8 yes Figure 4 A cross-sectional view of the material pressure plate and the cutting slider when the gantry frame is hidden and relative motion occurs between them. Figure 9This is a partial structural schematic diagram of the cutting slider provided in this embodiment; Figure 10 This is a schematic diagram of the structure of the first locking block provided in this embodiment; Figure 11 This is a schematic diagram of the clamping and positioning mechanism provided in this embodiment; Figure 12 This is a cross-sectional schematic diagram of the clamping and positioning mechanism provided in this embodiment; Figure 13 This is a schematic diagram of the clamping and positioning mechanism provided in this embodiment after the clamping seat is hidden; Figure 14 This is a structural schematic diagram of the clamping and positioning mechanism provided in this embodiment from another perspective after the clamping seat is hidden; Explanation of reference numerals in the attached drawings: 1. Worktable; 2. Gantry frame; 31. Slide table; 32. Push plate; 41. Cutting drive component; 42. Cutting slider; 421. Slide groove; 422. Inclined hole; 423. Guide shaft; 4231. Limiting platform; 43. Cutting tool; 44. Pressure plate; 441. Drive pin; 45. Third spring; 5. Clamping and positioning mechanism; 51. Clamping seat; 52. Drive plate; 521. Groove; 522. Inclined bottom surface; 52 3. Locking boss; 524. Guide rod; 525. Drive hole; 53. Second spring; 54. First slider; 541. First locking pin; 55. Second slider; 56. Connecting rod; 57. Drive rod; 571. Second locking pin; 58. Clamping plate; 581. Strip hole; 61. First locking block; 611. Guide pin; 612. Drive inclined surface; 62. Second locking block; 63. Transmission rod; 631. Spherical part; 64. First spring. Detailed Implementation

[0019] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments, but this is not to limit the scope of the invention to this.

[0020] like Figures 1 to 14 As shown in the figure, the printing coated paper cutting machine described in this embodiment includes a worktable 1, a gantry frame 2 fixedly installed on the worktable 1, and a pushing assembly disposed on one side of the worktable 1. The pushing assembly may include two slides 31 spaced apart on the worktable 1 and push plates 32 slidably connected to the slides 31 at both ends. The coated paper stack can be pushed to move on the worktable 1 by manually pushing the push plates 32 to realize the feeding of the coated paper stack. Alternatively, a power component can be used to push the push plates 32 to move to realize the feeding of the coated paper stack. In actual application, it can be set according to the actual design needs. The gantry frame 2 is equipped with a cutting drive 41 and a slidably mounted cutting slider 42. The cutting slider 42 is connected to the output end of the cutting drive 41. The bottom of the cutting slider 42 is equipped with a cutting tool 43. The cutting slider 42 is also elastically raised and lowered by a pressure plate 44. The cutting drive 41 is preferably a hydraulic cylinder. At least one side of the gantry frame 2 is provided with a clamping and positioning mechanism 5. Preferably, both sides of the gantry frame 2 are provided with clamping and positioning mechanisms 5, which makes the clamping and positioning of the copperplate paper stack more reliable and makes the copperplate paper stack more stable during the cutting process. Each clamping and positioning mechanism 5 includes a clamping seat 51 fixed on the gantry frame 2, two clamping plates 58 that are relatively horizontally slidable on the clamping seat 51, and a drive plate 52 that is elastically horizontally slidable in the middle of the clamping seat 51. Both clamping plates 58 can be driven to cooperate with the drive plate 52. The drive plate 52 is located on the side of the clamping seat 51 facing the cutting slider 42. Each drive plate 52 is provided with a locking component for each cutting slider 42. The locking component is configured to lock or release the drive plate 52 when the pressure plate 44 moves up and down with the cutting slider 42. A coupling transmission structure is provided between the drive plate 52 and the pressure plate 44. The coupling transmission structure is configured to convert the lifting motion of the pressure plate 44 into the horizontal sliding motion of the drive plate 52 when the cutting slider 42 drives the pressure plate 44 to move up and down and the locking component releases the lock on the drive plate 52. The drive plate 52 then synchronously drives the two clamping plates 58 to slide towards or away from each other to clamp or release the stack of coated paper.

[0021] Before the cutting operation, the pushing component pushes the coated paper to the cutting station in a direction parallel to the cutting feed. The length direction of the paper stack is consistent with the feed direction. The two clamping plates 58 are located on both sides of the width direction of the paper stack. In the initial state, the pressure plate 44 is in the raised standby position, the locking component keeps the drive plate 52 locked, and the two clamping plates 58 are in an open state that is far apart from each other.

[0022] During cutting, the cutting drive 41 drives the cutting slider 42 to move downwards, and the cutting slider 42 simultaneously drives the cutting tool 43 and the pressure plate 44 to move downwards. The pressure plate 44 first contacts the top surface of the paper stack, and after being blocked by the paper stack, it generates a relative lifting displacement with the cutting slider 42. At this time, the locking component is triggered to unlock with the relative movement of the pressure plate 44, releasing the locking constraint on the drive plate 52. The coupling transmission structure then uses the relative vertical displacement of the pressure plate 44 and the cutting slider 42 to make the drive plate 52 slide in the horizontal direction, thereby driving the two clamping plates 58 to slide towards each other in the width direction of the paper stack, clamping and positioning the paper stack from both sides. Then the cutting tool 43 continues to move downwards to complete the cutting operation.

[0023] After the cutting is completed, the cutting slider 42 moves upward, the pressure plate 44 gradually releases pressure, the coupling transmission structure causes the drive plate 52 to slide in the opposite direction, the clamping plate 58 slides back to release the paper stack, and the locking component relocks the drive plate 52, thereby resetting to the standby state.

[0024] This solution uses the lifting action of the cutting slider 42 to synchronously trigger lateral clamping and positioning, achieving synchronous linkage between cutting and clamping without the need for additional independent drive components. It can complete lateral clamping and positioning before the cutter cuts into the paper stack, effectively resisting paper layer slippage caused by lateral cutting force, suppressing relative slippage between coated paper layers and cutting position offset, and significantly improving the cutting accuracy and operational stability of thick paper stacks.

[0025] The printing coated paper cutting machine described in this embodiment, such as Figures 4 to 7 , Figures 11 to 14 As shown, the coupling transmission structure includes a drive pin 441 disposed at the bottom of the pressure plate 44 and a slot 521 opened at the bottom of the drive plate 52. The bottom of the slot 521 is an inclined bottom surface 522. The drive pin 441 can move into the slot 521 and contact and engage with the inclined bottom surface 522 of the slot 521. In the initial state, the drive pin 441 extends into the slot 521 at the bottom of the drive plate 52 and maintains contact with the inclined bottom surface 522 of the slot 521, thereby keeping the drive plate 52 locked by the locking component. When cutting the thick paper stack, the pressure plate 44 moves down with the cutting slider 42, and the drive pin 441 gradually moves down from the slot 521. After the pressure plate 44 contacts the paper stack, the pressure plate 44 moves upward relative to the cutting slider 42, thereby driving the locking component to release the locking of the drive plate 52, so that the drive plate 52 slides horizontally under the elastic action, driving the two clamping plates 58 to clamp and position the paper stack. After the cutting is completed, when the pressure plate 44 moves up and resets with the cutting slider 42, the drive pin 441 moves upward. When the drive pin 441 moves up to enter the slot 521 and contacts the inclined bottom surface 522 of the slot 521, the pressure plate 44, through the cooperation of the drive pin 441 and the inclined bottom surface 522, applies a horizontal component force to the drive plate 52, causing the drive plate 52 to slide against the elastic force until the locking assembly locks the drive plate 52 again.

[0026] The printing coated paper cutting machine described in this embodiment, such as Figures 5 to 14As shown, the locking assembly includes a first locking block 61 slidably hinged to the cutting slider 42, a second locking block 62 fixed to the cutting slider 42 and located above the first locking block 61, a transmission rod 63 movably passing through the first locking block 61 in a vertical direction, and a first spring 64 sleeved on the outer periphery of the transmission rod 63; the second locking block 62 is L-shaped, and the bottom of the transmission rod 63 remains in contact with the top surface of the pressure plate 44 under the elastic force of the first spring 64; the drive plate 52 is provided with a side facing the cutting slider 42 for engaging with the first locking block 61. The locking boss 523 cooperates with the second locking block 62; the locking boss 523 extends vertically; when the pressure plate 44 causes the transmission rod 63 to move upward relative to the first locking block 61 against the elastic force of the first spring 64, the first spring 64 applies a pushing force to the first locking block 61, causing the first locking block 61 to generate horizontal and vertical displacement relative to the cutting slider 42, thereby releasing the restriction on the locking boss 523; when the second locking block 62 moves downward until its horizontal arm contacts and cooperates with the locking boss 523, the second locking block 62 maintains the restriction on the drive plate 52.

[0027] Specifically, in the initial standby state, the transmission rod 63 abuts against the top surface of the pressure plate 44 under the elastic force of the first spring 64, and the first locking block 61 is in the extended state, locking against the side of the locking protrusion 523 of the drive plate 52, restricting the horizontal sliding of the drive plate 52, and keeping the clamping plate 58 in the open state. When the pressure plate 44 contacts the paper stack and moves upward relative to the cutting slider 42, the pressure plate 44 pushes the transmission rod 63 to slide upward relative to the first locking block 61 against the elastic force of the first spring 64. Since the first locking block 61 has degrees of freedom in the vertical and horizontal directions at this time, the first spring 64 applies a reverse force to the first locking block 61, causing the first locking block 61 to produce a combined displacement of horizontal contraction and vertical lifting, and finally disengage from the locking protrusion 523, completing the unlocking of the drive plate 52. The drive plate 52 can then slide under the action of elastic force and drive the clamping plate 58 to clamp and position the paper stack.

[0028] For the thin paper stack cutting scenario, the cutting slider 42 has a larger downward stroke. Before the pressure plate 44 contacts the top of the paper stack, the second locking block 62 moves down with the cutting slider 42 until its horizontal arm directly abuts against the side of the locking protrusion 523. After the pressure plate 44 contacts the paper stack, the first spring 64 drives the first locking block 61 to release the restriction on the locking protrusion 523, that is, the first locking block 61 retracts and unlocks. At this time, since the second locking block 62 can still block the horizontal movement of the locking protrusion 523 through its horizontal arm, it maintains the lock on the drive plate 52, keeping the clamping plate 58 in an open state. At this time, only the pressure plate 44 completes the vertical pressing of the paper stack. After the cutting is completed, the cutting slider 42 moves up, the transmission rod 63 resets under the action of the first spring 64, the first locking block 61 extends again to lock the locking protrusion 523, and the second locking block 62 moves up with the cutting slider 42 and disengages from the locking protrusion 523.

[0029] In this embodiment, the first locking block 61 enables automatic unlocking and clamping of conventional thick paper stacks, while the second locking block 62 enables locking and holding of thin paper stacks. The purely mechanical structure automatically adapts to the two cutting conditions without the need for additional detection elements and control programs. With this configuration, the locking component can adaptively switch the locking state according to the displacement of the pressure plate 44, adapting to the positioning requirements of paper stacks of different thicknesses. When cutting thin paper stacks, the pressure plate 44 can be used to vertically press the paper, avoiding lateral clamping that could damage the paper surface. The overall structure is compact, and the processing and maintenance costs are lower.

[0030] The printing coated paper cutting machine described in this embodiment, such as Figure 7 As shown, a spherical portion 631 is provided at the bottom of the transmission rod 63, and the spherical portion 631 is in movable contact with the top surface of the pressure plate 44. This embodiment adopts a spherical contact structure, which can significantly reduce the sliding friction resistance between the transmission rod 63 and the pressure plate 44, reduce component wear, and extend service life; at the same time, it can prevent the transmission rod 63 from getting stuck with the pressure plate 44 when sliding horizontally, ensuring smooth and reliable unlocking and resetting actions of the locking assembly, and improving the stability of the structure operation.

[0031] The printing coated paper cutting machine described in this embodiment, such as Figures 5 to 10As shown, the side wall of the cutting slider 42 is provided with a groove 421, and the groove wall of the groove 421 is provided with an inclined hole 422. The first locking block 61 is movably disposed in the groove 421, and the side wall of the first locking block 61 is provided with a guide pin 611, which is movably embedded in the corresponding inclined hole 422. When the transmission rod 63 is pushed by the pressure plate 44, the first spring 64 applies a vertical thrust to the first locking block 61, and the guide pin 611 slides along the inclined trajectory of the inclined hole 422, causing the first locking block 61 to simultaneously generate a combined vertical lifting and horizontal contraction motion, thereby disengaging and unlocking from the locking boss 523. When the transmission rod 63 is reset, the first spring 64 releases the vertical thrust on the first locking block 61, and the first locking block 61 resets under its own weight. The guide pin 611 slides in the opposite direction along the inclined hole 422, causing the first locking block 61 to extend again to contact and engage with the locking boss 523, thereby locking the drive plate 52.

[0032] In this embodiment, the vertical force on the first locking block 61 can be directly converted into a composite displacement of horizontal and vertical forces through the cooperation of the oblique hole 422 and the guide pin 611, without the need for additional reversing transmission elements, resulting in a simple and compact structure.

[0033] The printing coated paper cutting machine described in this embodiment, such as Figure 10 As shown, a driving inclined surface 612 for cooperating with the locking boss 523 is provided on one side of the first locking block 61. When the pressure plate 44 causes the driving plate 52 to slide horizontally against the elastic force through the coupling transmission structure, the locking boss 523 can cooperate with the driving inclined surface 612 to apply a horizontal thrust to the first locking block 61, so that the first locking block 61 drives the transmission rod 63 to move relative to the cutting slider 42.

[0034] Specifically, after the cutting is completed, the cutting slider 42 drives the cutting tool 43 to move upward, and then the cutting slider 42 drives the pressure plate 44 to move upward. When the drive pin 441 enters the slot 521 and contacts the inclined bottom surface 522, the pressure plate 44, through the drive pin 441 and the inclined bottom surface 522, applies a horizontal thrust to the drive plate 52, causing the drive plate 52 to slide against the elastic force. When the locking boss 523 moves synchronously with the drive plate 52 and contacts the drive inclined surface 612 of the first locking block 61, the locking boss 523 applies a horizontal thrust to the drive inclined surface 612. Through the component force of the inclined surface, the first locking block 61 automatically generates a contraction and lifting displacement to avoid the movement path of the locking boss 523. When the locking boss 523 completely passes the first locking block 61, the first locking block 61 automatically resets and extends, blocking the side of the locking boss 523, thus locking the drive plate 52.

[0035] A driving slope 612 is provided on the first locking block 61 so that the first locking block 61 avoids the driving plate 52 and overcomes the elastic force, thereby realizing the reset and locking of the first locking block 61 and ensuring that it can reliably return to the standby locking state after each cutting cycle.

[0036] The printing coated paper cutting machine described in this embodiment, such as Figure 7 and Figure 10 As shown, the transmission rod 63 has a square cross-section, and the first locking block 61 has a square hole through it, into which the transmission rod 63 slides. This arrangement restricts the rotational freedom between the transmission rod 63 and the first locking block 61, thereby ensuring the stability of the vertical movement of the transmission rod 63 relative to the first locking block 61.

[0037] The printing coated paper cutting machine described in this embodiment, such as Figure 11 , Figure 13 and Figure 14 As shown, a plurality of guide rods 524 extending horizontally are provided on one side of the drive plate 52. The guide rods 524 slide through the clamping seat 51 and are connected to the inner wall of the clamping seat 51 by a second spring 53 coaxially arranged with the guide rods 524. Specifically, when the drive pin 441 cooperates with the inclined bottom surface 522 to make the drive plate 52 slide against the elastic force of the second spring 53, the drive plate 52 slides on the clamping seat 51, the guide rods 524 guide the drive plate 52, and the second spring 53 is compressed and stores energy, and the clamping plate 58 opens under the drive of the drive plate 52; when the locking component is unlocked and the drive pin 441 moves out of the slot 521, the second spring 53 releases its elastic force, pushes the drive plate 52 to slide back and reset, and drives the clamping plate 58 to complete the clamping action.

[0038] In this embodiment, the use of multiple guide rods 524 ensures the straightness of the drive plate 52 during its sliding process, prevents the drive plate 52 from becoming skewed or jammed, and improves transmission stability. The second spring 53 is arranged coaxially with the guide rods 524, and the direction of the elastic force is consistent with the sliding direction of the drive plate 52, making the transmission of the reset force more direct. This provides a continuous and stable clamping force for the clamping plate 58, ensuring the reliability of clamping and positioning during the cutting process.

[0039] The printing coated paper cutting machine described in this embodiment, such as Figures 11 to 14As shown, a first slider 54 is slidably disposed in the middle of the clamping base 51, and second sliders 55 are slidably disposed on both sides of the first slider 54. A first locking pin 541 protrudes from the side of the first slider 54 facing the drive plate 52. The drive plate 52 has an inclined drive hole 525. The first locking pin 541 is movably embedded in the drive hole 525. A connecting rod 56 is respectively disposed between the first slider 54 and the two second sliders 55. The two ends of the connecting rod 56 are respectively hinged to the first slider 54 and the second slider 55. A drive rod 57 is respectively disposed in the clamping base 51 corresponding to the two clamping plates 58. The end of the drive rod 57 near the second slider 55 is hinged to the inner wall of the clamping base 51 and can movably contact and cooperate with the side wall of the corresponding second slider 55. A second locking pin 571 is provided at the end of the drive rod 57 near the clamping plate 58. The clamping plate 58 has a strip hole 581 extending in the vertical direction. The second locking pin 571 is movably embedded in the corresponding strip hole 581.

[0040] Specifically, when the drive plate 52 slides horizontally, the wall of the inclined drive hole 525 applies force to the first locking pin 541, causing the first slider 54 to slide back and forth in the vertical direction; when the first slider 54 slides, it pulls or pushes the two second sliders 55 to slide synchronously towards or away from each other through the connecting rod 56 hinged at both ends; when the second sliders 55 slide, they squeeze or release the rod body of the drive rod 57, causing the drive rod 57 to swing back and forth around its hinge point near the end of the second slider 55; the second locking pin 571 at the other end of the drive rod 57 slides in the strip hole 581 of the clamping plate 58, converting the swing of the drive rod 57 into the horizontal reciprocating sliding of the clamping plate 58, thereby realizing the clamping of the two clamping plates 58 towards each other and opening of the opposite sides.

[0041] In this embodiment, a slider-linkage mechanism 56 is used for transmission, which can convert the horizontal sliding of the drive plate 52 into the synchronous bidirectional output of the two clamping plates 58, ensuring the synchronicity of the action of the clamping plates 58 on both sides, making the paper stack subjected to uniform force and achieving higher positioning accuracy.

[0042] The printing coated paper cutting machine described in this embodiment, such as Figures 4 to 8As shown, guide shafts 423 extend vertically downward at both ends of the cutting slider 42, and a limiting platform 4231 is provided at the end of the guide shaft 423. The two ends of the pressure plate 44 are slidably sleeved on the outer peripheral wall of the corresponding guide shaft 423. A third spring 45 is sleeved on the outer peripheral wall of each guide shaft 423. The two ends of the third spring 45 abut against the pressure plate 44 and the cutting slider 42, respectively, so that the pressure plate 44 is kept in movable contact with the limiting platform 4231. A clearance hole for avoiding the cutting tool 43 is provided through the middle of the pressure plate 44. In this embodiment, the cooperation structure between the guide shaft 423 and the third spring 45 ensures the straightness of the lifting and lowering movement of the pressure plate 44 and provides elastic clamping force to the pressure plate 44, which can adapt to paper stacks of different thicknesses and always maintain a stable clamping effect. The pressure plate 44 contacts the paper stack before the cutting blade 43 and leaves the paper stack after the cutting blade 43, which can maintain vertical clamping throughout the cutting process and effectively suppress the vertical movement of the paper stack. The setting of the clearance hole provides movement space for the blade.

[0043] The above description is only a preferred embodiment of the present invention. Therefore, all equivalent changes or modifications made to the structure, features and principles described in the claims of this patent application are included within the protection scope of this patent application.

Claims

1. A printing coated paper cutting machine, characterized in that, It includes a worktable and a gantry frame mounted on the worktable; the gantry frame is equipped with a cutting drive and a sliding cutting slider, the cutting slider is connected to the output end of the cutting drive, the bottom of the cutting slider is equipped with a cutting tool, and the cutting slider is also elastically raised and lowered with a pressure plate; The gantry is provided with a clamping and positioning mechanism on at least one side. Each clamping and positioning mechanism includes a clamping seat fixed to the gantry, two clamping plates that are horizontally slidably disposed on the clamping seat, and a drive plate that is elastically horizontally slidably disposed in the middle of the clamping seat. Both clamping plates can be driven to cooperate with the drive plate. The drive plate is located on the side of the clamping seat facing the cutting slider. Each drive plate of the cutting slider is provided with a locking component. The locking component is configured to lock or release the drive plate when the pressure plate moves up and down with the cutting slider. A coupling transmission structure is provided between the drive plate and the pressure plate. The coupling transmission structure is configured to convert the lifting motion of the pressure plate into the horizontal sliding motion of the drive plate when the cutting slider drives the pressure plate to move up and down and the locking component releases the lock on the drive plate. The drive plate then synchronously drives the two clamping plates to slide towards or away from each other to clamp or release the stack of coated paper.

2. The printing coated paper cutting machine according to claim 1, characterized in that, The coupling transmission structure includes a drive pin disposed at the bottom of the pressure plate and a slot opened at the bottom of the drive plate. The bottom of the slot is an inclined surface, and the drive pin can move into the slot and contact and cooperate with the inclined bottom surface of the slot.

3. The printing coated paper cutting machine according to claim 1, characterized in that, The locking assembly includes a first locking block that is slidably hinged to the cutting slider, a second locking block that is fixed to the cutting slider and located above the first locking block, a transmission rod that moves vertically through the first locking block, and a first spring that is sleeved on the outer periphery of the transmission rod; the second locking block is L-shaped, and the bottom of the transmission rod remains in contact with the top surface of the pressure plate under the elastic force of the first spring. The drive plate is provided with a locking protrusion on the side facing the cutting slider for cooperating with the first locking block and the second locking block; the locking protrusion extends in the vertical direction. When the pressure plate causes the transmission rod to move upward relative to the first locking block against the elastic force of the first spring, the first spring applies a pushing force to the first locking block, causing the first locking block to produce horizontal and vertical displacements relative to the cutting slider, thereby releasing the restriction on the locking boss; when the second locking block moves downward until its horizontal arm contacts and engages with the locking boss, the second locking block maintains the restriction on the drive plate.

4. A printing coated paper cutting machine according to claim 3, characterized in that, The bottom of the transmission rod is provided with a spherical part, which is in movable contact with the top surface of the pressure plate.

5. A printing coated paper cutting machine according to claim 3, characterized in that, The cutting slider has a groove on its side wall, and the groove wall has an inclined hole. The first locking block is movably disposed in the groove, and the side wall of the first locking block is provided with a guide pin, which is movably embedded in the corresponding inclined hole.

6. A printing coated paper cutting machine according to claim 3, characterized in that, One side of the first locking block is provided with a driving inclined surface for cooperating with the locking boss. When the pressure plate slides horizontally against the elastic force through the coupling transmission structure, the locking boss can cooperate with the driving inclined surface to apply a horizontal thrust to the first locking block, so that the first locking block drives the transmission rod to move relative to the cutting slider.

7. A printing coated paper cutting machine according to claim 3, characterized in that, The cross-section of the transmission rod is square, and the first locking block has a square hole through which the transmission rod slides.

8. A printing coated paper cutting machine according to claim 1, characterized in that, The drive plate has a plurality of guide rods extending horizontally on one side. The guide rods slide through the clamping seat and are connected to the inner wall of the clamping seat by a second spring coaxially arranged with the guide rods.

9. A printing coated paper cutting machine according to any one of claims 1 to 8, characterized in that, The clamping seat also has a first slider slidably disposed in the middle and a second slider slidably disposed on both sides of the first slider. The first slider has a first locking pin protruding on the side facing the drive plate. The drive plate has an inclined drive hole. The first locking pin is movably embedded in the drive hole. A connecting rod is disposed between the first slider and the two second sliders. The two ends of the connecting rod are respectively hinged to the first slider and the second slider. The clamping seat is provided with a drive rod corresponding to each of the two clamping plates. The end of the drive rod near the second slider is hinged to the inner wall of the clamping seat and can make movable contact with the side wall of the corresponding second slider. The end of the drive rod near the clamping plate is provided with a second locking pin. The clamping plate has a strip hole extending in the vertical direction, and the second locking pin is movably embedded in the corresponding strip hole.

10. A printing coated paper cutting machine according to any one of claims 1 to 8, characterized in that, The cutting slider has guide shafts extending vertically downward at both ends, and a limiting platform is provided at the end of the guide shaft. The two ends of the pressure plate are slidably sleeved on the outer peripheral wall of the corresponding guide shaft. A third spring is sleeved on the outer peripheral wall of each guide shaft. The two ends of the third spring abut against the pressure plate and the cutting slider, respectively, so that the pressure plate keeps in contact with the limiting platform. A clearance hole for avoiding the cutting tool is provided through the middle of the pressure plate.

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