A fully automatic die-cutting machine and its accessories

Abstract

The present invention provides a fully automatic die-cutting machine and its accessories, wherein the fully automatic die-cutting machine includes: a moving assembly and a differential assembly. When the sharpness of the blade on the cutting roller decreases, the moving assembly enables the pressure roller to move vertically downward, shortening the distance between the pressure roller and the cutting roller to compensate for the gap caused by the decrease in blade sharpness, so that the blade can still maintain a pressure and cutting force close to the initial state after the sharpness is slightly reduced, thereby extending the service life of the blade and reducing the replacement frequency and production cost of the blade. At the same time, the downward movement of the pressure roller will cause a difference in the linear speed of the pressure roller and the cutting roller, that is, the transmission ratio of the pressure roller and the cutting roller changes. The transmission ratio of the pressure roller and the cutting roller is adjusted by the differential assembly to ensure that after the position of the pressure roller changes, the transmission ratio of the pressure roller and the cutting roller can be restored to the initial state, ensuring that the material always remains flat and stable during the cutting process, and effectively avoiding product quality defects caused by speed mismatch.

Description

Technical Field

[0001] The present invention relates to the technical field of cutting equipment, in particular to a full-automatic die-cutting machine and its accessories. Background Art

[0002] Fully automatic die-cutting machines are key equipment in the packaging and printing industry. They are mainly used to accurately cut and crease printed flexible materials such as paper, leather, and plastic according to pre-designed shapes. They are widely used in the processing and production of products such as cartons, color boxes, trademarks, and greeting cards.

[0003] Before starting a fully automatic die-cutting machine, the operator must first install the material to be processed on the discharge device. The operator then passes the material sequentially through the gap between the pressure roller and the cutting roller and secures it to the receiving device. The control system sets parameters such as cutting size and speed, and also checks the stability of the blade's installation on the cutting roller. When the fully automatic die-cutting machine is in operation, the discharge device releases the material at a constant rate. The pressure roller applies pressure via a cylinder or spring, pressing the material tightly against the surface of the cutting roller to ensure a smooth, non-slip surface during cutting. The cutting roller rotates at high speed, driven by a motor. The blade mounted on the cutting roller rotates with it, working in conjunction with the pressure roller to continuously cut the material. After cutting, the receiving device collects the finished material, and waste material is discharged through a waste collection device.

[0004] However, in the fully automatic die-cutting machines in the existing technology, the reduction in blade sharpness will lead to an increase in the material cutting gap between the blade edge and the pressure roller, affecting the cutting accuracy. Since the structural design of the pressure roller and the cutting roller usually adopts a fixed installation method, it is difficult to correct the blade position through fine-tuning. Even if the sharpness of the blade is slightly reduced, it cannot be used anymore and can only be replaced as a whole, resulting in a large number of blades being discarded. This not only increases the cost of consumables, but also frequently replacing blades will affect production efficiency. Summary of the Invention

[0005] Based on this, it is necessary to provide a fully automatic die-cutting machine to address the problem of high blade waste rate in the current fully automatic die-cutting machine.

[0006] The above purpose is achieved through the following technical solutions:

[0007] A fully automatic die-cutting machine comprises a cutting roller, a pressing roller, a support frame and a differential assembly.

[0008] The pressing roller and the cutting roller are arranged on the support frame in parallel. A slide groove is provided on the support frame. The slide groove enables the pressing roller and the cutting roller to move away from or approach each other.

[0009] The differential assembly is connected to the pressure roller and the cutting roller. When the sharpness of the blade on the cutting roller decreases, the pressure roller is driven closer to the cutting roller. The differential assembly is used to adjust the transmission ratio between the pressure roller and the cutting roller.

[0010] Furthermore, it also includes a moving component, which includes a first guide rail, a first slider and a second slider. The first guide rail is fixedly arranged on the support frame, the first slider can slide along the first direction in the first guide rail, the second slider is fixedly connected to the first guide rail, the first slider is rotationally connected to the pressure roller, and the first slider and the pressure roller move synchronously in the first direction; the second slider is rotationally connected to the cutting roller; wherein, the first direction is the direction of the vertical connection line between the axis of the cutting roller and the axis of the pressure roller.

[0011] Furthermore, a connecting rod extends from one end of the cutting roller, and the connecting rod is rotatably connected to the second slider at one end away from the cutting roller; the differential assembly includes a first friction wheel, a second friction wheel and two center friction wheels, and the first friction wheel and the second friction wheel are both provided with mutually matching inclined surfaces; the first friction wheel is fixedly connected to the pressure roller, and the first friction wheel is rotatably connected to the first slider at one end away from the pressure roller; the second friction wheel is sleeved on the connecting rod, and the second friction wheel and the cutting roller rotate synchronously, and the second friction wheel can slide relative to the connecting rod along the second direction; the two center friction wheels are movably arranged between the first friction wheel and the second friction wheel, and the two center friction wheels are in contact with the inclined surfaces of the first friction wheel and the second friction wheel, and the transmission ratio of the first friction wheel and the second friction wheel is adjusted by changing the position of the two center friction wheels; wherein, the second direction is a direction parallel to the axis of the cutting roller.

[0012] Furthermore, the differential assembly includes a first rack, a second rack and a gear matching the first rack and the second rack, the first rack is fixedly connected to the first slider, the second rack is connected to the second slider, the gear is rotatably connected to the center friction wheel, and the gear and the center friction wheel move synchronously in the first direction.

[0013] Furthermore, the differential assembly also includes a length rod, a forward thread is provided on the second slider, a reverse thread is provided on the second rack, and a thread is provided inside the length rod that matches the forward thread and the reverse thread. The second rack and the second slider are driven away from or towards each other by rotating the length rod.

[0014] Furthermore, the differential assembly also includes a nut and a first elastic member, the connecting rod is provided with a thread matching the nut, the nut is located between the second slider and the second friction wheel, the nut is used to control the movement displacement of the second friction wheel in the second direction, the two ends of the first elastic member are respectively fixedly connected to the second friction wheel and the support frame, and the elastic force of the first elastic member always makes the second friction wheel and the support frame move away from each other or have a tendency to move away from each other.

[0015] Furthermore, the moving assembly also includes a second guide rail, a third slider and a transmission rod, the second guide rail is fixedly set on the support frame, the third slider is slidably connected to the second guide rail, one end of the transmission rod is fixedly connected to the center friction wheel, and the other end of the transmission rod is set as a square rod, and a square groove is set in the third slider to match the square rod, and the square rod is slidably connected to the square groove.

[0016] Furthermore, the two central friction wheels are arranged as a wheel set, and two sets of the wheel sets are arranged between the first friction wheel and the second friction wheel.

[0017] Furthermore, the moving assembly and the differential assembly are both provided in two groups.

[0018] The present invention also provides an accessory for a fully automatic die-cutting machine, which is applied to any of the fully automatic die-cutting machines described above, and includes a conveying roller, which is used to convey the material between the cutting roller and the pressure roller.

[0019] The beneficial effects of the present invention are:

[0020] The present invention provides a fully automatic die-cutting machine and its accessories, wherein the fully automatic die-cutting machine includes: a moving assembly and a differential assembly. When the sharpness of the blade on the cutting roller decreases, the moving assembly causes the pressure roller to move downward in the vertical direction, shortening the distance between the pressure roller and the cutting roller to compensate for the gap caused by the decrease in blade sharpness, so that the blade can still maintain a pressure and cutting force close to that in the initial state after the sharpness is slightly reduced, thereby extending the overall service life of the blade and reducing the replacement frequency and production cost of the blade. The downward movement of the pressure roller will cause the linear speed ratio of the pressure roller and the cutting roller to change, that is, the transmission ratio will change. If it is not adjusted, it is easy to cause material conveying and cutting to be out of sync, causing problems such as cutting misalignment. Therefore, the transmission ratio of the pressure roller and the cutting roller is adjusted by the differential assembly to ensure that after the position of the pressure roller changes, the transmission ratio of the pressure roller and the cutting roller can be restored to the initial state, ensuring that the material always remains flat and stable during the cutting process, and effectively avoiding product quality defects caused by speed mismatch. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic structural diagram of a fully automatic die-cutting machine according to an embodiment of the present invention;

[0022] Figure 2 A front view of a fully automatic die-cutting machine provided in one embodiment of the present invention;

[0023] Figure 3 for Figure 2 AA cross-section diagram of the fully automatic die-cutting machine;

[0024] Figure 4 for Figure 3 A partial enlarged view of point C in the middle;

[0025] Figure 5 A side view of a fully automatic die-cutting machine provided in one embodiment of the present invention;

[0026] Figure 6 for Figure 5 BB cross-section diagram of the fully automatic die-cutting machine;

[0027] Figure 7 for Figure 6 A partial enlarged view of point D in the middle;

[0028] Figure 8 for Figure 6 A partial enlarged view of point E in the middle;

[0029] Figure 9 for Figure 6 A partial enlarged view of point F in the middle;

[0030] Figure 10 An exploded view of a fully automatic die-cutting machine according to an embodiment of the present invention;

[0031] Figure 11 for Figure 10 A partial enlarged view of point G in the middle;

[0032] Figure 12 for Figure 11 A partial enlarged view of the H in the middle;

[0033] Figure 13 for Figure 11 A partial enlarged view of point I in the middle.

[0034] in:

[0035] 110, support frame; 111, slide; 120, pressing roller; 130, cutting roller; 131, connecting rod; 132, blade; 133, pressing block; 134, locking screw; 135, tightening screw; 140, pressing rod; 150, pressing bearing;

[0036] 200, moving assembly; 210, first guide rail; 220, second guide rail; 230, first slider; 240, second slider; 260, third slider; 270, transmission rod; 271, square rod;

[0037] 300, differential assembly; 310, first friction wheel; 320, second friction wheel; 330, center friction wheel; 340, first rack; 350, second rack; 360, gear; 370, length rod; 380, nut; 390, first elastic member. DETAILED DESCRIPTION

[0038] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail below through embodiments and in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0039] The serial numbers assigned to components herein, such as "first," "second," etc., are used solely to distinguish the objects being described and do not convey any sequential or technical meaning. References to "connection" and "coupling" herein, unless otherwise specified, include both direct and indirect connections (couplings). In the description of the present invention, it should be understood that terms such as "upper," "lower," "front," "back," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise" indicate positions or relationships based on those shown in the accompanying drawings. These terms are intended solely to facilitate the description of the present invention and simplify the description. They are not intended to indicate or imply that the device or component being referred to must have, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention.

[0040] In the present invention, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediary. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0041] Refer to the following Figures 1 to 13 A fully automatic die-cutting machine provided by an embodiment of the present invention is described.

[0042] A fully automatic die-cutting machine provided by an embodiment of the present invention includes a support frame 110 , a pressing roller 120 , a cutting roller 130 , a pressing rod 140 and a pressing bearing 150 .

[0043] The support frame 110 serves as the basic frame structure of the equipment and is fixedly installed on the ground or other fixed table to provide stable support for other components.

[0044] Both ends of the rotating shaft of the pressing roller 120 are installed on the support frame 110 through bearings. The pressing roller 120 is used to press the material to be cut tightly against the surface of the cutting roller 130 to prevent the material from sliding during the cutting process and ensure cutting accuracy.

[0045] A detachable blade 132 is mounted on the outer circumference of the cutting roller 130. Driven by a motor, the cutting roller 130 rotates at high speed, cooperating with the pressure roller 120 to cut and indent the material. The cutting roller 130 ensures stability and cutting accuracy during the rotation of the blade 132. Connecting rods 131 extend from both ends of the cutting roller 130, which rotatably connect the cutting roller 130 to the support frame 110 via these rods. These rods transmit motor power, ensuring stable rotation of the cutting roller 130.

[0046] The cutting roller 130 is equipped with a blade 132 and a pressure block 133. As the core executive component of the fully automatic die-cutting machine, the blade 132 is directly responsible for cutting and creasing materials such as paper and plastic. The pressure block 133 is typically a wedge-shaped block that securely fixes the blade 132 to the cutting roller 130, ensuring that the blade 132 does not shift or loosen during high-speed rotation and cutting, thereby ensuring cutting stability and safety. When removing the blade 132, the multiple locking screws 134 on the pressure block 133 are loosened to release the fixing force of the pressure block 133 on the blade 132, and then the tightening screw 135 located on the inner side of the pressure block 133 is turned to make the tightening screw 135 approach the rotation axis of the cutting roller 130, so that the tightening screw 135 pushes the cutting roller 130 and pushes the pressure block 133 outward, thereby reducing the clamping force of the pressure block 133 on the blade 132. The operator directly removes the old blade 132, which has reduced sharpness and cannot be used again, from both sides of the pressure block 133, and then puts the new blade 132 between the pressure block 133 and the cutting roller 130, resets the pressure block 133, first rotates the tightening screw 135 toward the rotation axis away from the cutting roller 130, and then tightens the multiple locking screws 134. The structural characteristics of the wedge-shaped pressure block 133 are used to achieve a firm fixation of the blade 132.

[0047] The clamping rod 140 is symmetrically distributed on the upper ends of both sides of the clamping roller 120. One end of the clamping rod 140 abuts against the clamping bearing 150 to apply pressure to the clamping roller 120. An elastic member is provided between the clamping rod 140 and the clamping bearing 150. The elastic force of the elastic member always makes the clamping rod 140 and the clamping bearing 150 move away from each other or have a tendency to move away from each other. The length of the clamping rod 140 is adjusted by manual screwing or control system to control the pressure of the clamping roller 120 on the cutting material, thereby ensuring that appropriate clamping force is applied to materials of different materials and thicknesses.

[0048] However, existing fully automatic die-cutting machines often use a fixed installation method to fix the pressure roller 120 and the cutting roller 130, so that a gap is formed between the blade 132 on the cutting roller 130 and the pressure roller 120 to allow the material to pass through. After the sharpness of the blade 132 on the cutting roller 130 is slightly reduced, it is impossible to calibrate the position of the blade 132 after the sharpness is reduced to adjust the gap for the material to pass through. The blade 132 can only be replaced, resulting in a large number of blades 132 with slightly reduced sharpness being discarded. The premature replacement of blades 132 significantly increases the company's blade 132 procurement and maintenance costs, and frequent shutdowns for blade 132 replacement reduce production efficiency. If the pressure roller 120 is directly controlled to move downward to shorten the distance from the cutting roller 130 to compensate for the gap caused by the reduced sharpness of the blade 132, although the cutting pressure can be restored, it will cause the original transmission radius ratio between the pressure roller 120 and the cutting roller 130 to change, that is, the transmission ratio will change. The change in transmission ratio caused by the downward movement of the pressure roller 120 can cause quality problems such as material cutting misalignment and surface wrinkling, thereby increasing the scrap rate.

[0049] Based on this, the fully automatic die-cutting machine provided in the embodiment of the present invention includes a differential assembly 300 and a moving assembly 200 .

[0050] Specifically, the direction from the pressing roller 120 to the cutting roller 130 is set as the first direction, and the direction parallel to the axial direction of the cutting roller 130 is set as the second direction.

[0051] A slide groove 111 is provided on the support frame 110 , and the rotation axis of the pressure roller 120 extends to both ends. The rotation axis of the pressure roller 120 can move up and down along a first direction in the slide groove 111 .

[0052] The moving assembly 200 includes a first guide rail 210, a first slider 230 and a second slider 240. The first guide rail 210 is vertically fixed on the support frame 110. The first slider 230 is rotatably connected to the rotating shaft of the pressure roller 120. The first slider 230 is embedded in the first guide rail 210 to drive the pressure roller 120 to slide along the first direction. The second slider 240 is fixedly connected to the first guide rail 210. The second slider 240 is rotatably connected to the connecting rod 131 extending from the cutting roller 130.

[0053] The differential assembly 300 includes a first friction wheel 310 , a second friction wheel 320 , two center friction wheels 330 , a first rack 340 , a second rack 350 , and a gear 360 .

[0054] The first friction wheel 310 and the second friction wheel 320 are provided with interfitting inclined surfaces. The first friction wheel 310 is fixedly connected to the rotating shaft of the pressure roller 120 and is located between the first slider 230 and the support frame 110. The second friction wheel 320 is slidably connected to the connecting rod 131 extending from the cutting roller 130. The connecting rod 131 and the second friction wheel 320 are splined, allowing the second friction wheel 320 to slide relative to the connecting rod 131 in the second direction and rotate synchronously with the cutting roller 130.

[0055] Two central friction wheels 330 are movably disposed between the first friction wheel 310 and the second friction wheel 320. The two central friction wheels 330 engage the first friction wheel 310 and the second friction wheel 320, respectively, allowing the cutting roller 130 to rotate the pressure roller 120 via the two central friction wheels 330. The two central friction wheels 330 provide constant support for the pressure roller 120. The two central friction wheels 330 are used to change the transmission ratio between the first friction wheel 310 and the second friction wheel 320, that is, the transmission ratio between the pressure roller 120 and the cutting roller 130. When the midpoints of the two central friction wheels 330 are horizontally collinear with the midpoint of the line perpendicular to the axis of the first friction wheel 310 and the axis of the second friction wheel 320, the contact radii of the first and second friction wheels 310, 320, and the central friction wheels 330 are equal, resulting in the same linear velocity of the pressure roller 120 and the cutting roller 130, i.e., a 1:1 transmission ratio.

[0056] A first rack 340 extends downward from the first slider 230, and a second rack 350 extends upward from the second slider 240. A gear 360 meshes with the first and second racks 340 and 350. The gear 360 is rotatably connected to the center friction wheel 330, and the gear 360 and the center friction wheel 330 move synchronously in the first direction. When the second friction wheel 320 slides along the connecting rod 131 away from the cutting roller 130, the first rack 340, the second rack 350, and the gear 360 are configured to achieve a downward displacement ratio of 1:2 between the center friction wheel 330 and the first friction wheel 310. As a result, after the second friction wheel 320 completes its movement, the midpoints of the two center friction wheels 330 are horizontally collinear with the midpoint of a line perpendicular to the axes of the first and second friction wheels 310 and 320.

[0057] When the sharpness of the blade 132 on the cutting roller 130 is slightly reduced, the operator slides the second friction wheel 320 on the connecting rod 131 along the second direction away from the cutting roller 130 by a preset displacement. At this time, under the action of gravity, the central friction wheel 330 and the pressure roller 120 will move downward along the first direction, reducing the distance between the pressure roller 120 and the cutting roller 130, and restoring the cutting pressure of the blade 132 on the material, but at this time the linear speed ratio of the pressure roller 120 and the cutting roller 130 changes. During this process, if the pressure roller 120 drives the first slider 230 to move down 2 units of displacement, since the second rack 350 is fixed, the transmission effect of the first rack 340, the second rack 350 and the gear 360 causes the gear 360 and the center friction wheel 330 connected to the gear 360 to move down 1 unit of displacement synchronously. At this time, the midpoint of the two center friction wheels 330 and the midpoint of the vertical line connecting the axis of the first friction wheel 310 and the axis of the second friction wheel 320 are collinear in the horizontal direction, and the linear speeds of the pressure roller 120 and the cutting roller 130 are equal again, that is, the transmission ratio is restored to 1:1, thereby compensating for the change in transmission ratio caused by the downward movement of the pressure roller 120 and ensuring that the linear speeds of the pressure roller 120 and the cutting roller 130 match.

[0058] Therefore, the pressure roller 120 can be moved downward by the moving component 200 to compensate for the gap caused by the reduced sharpness of the blade 132. The transmission ratio change caused by the downward movement of the pressure roller 120 is prevented by the differential component 300, thereby achieving the continued use of the blade 132 after the sharpness is slightly reduced, thereby improving the utilization rate of the blade 132 and avoiding the overall replacement due to the slight reduction in the sharpness of the blade 132; at the same time, it effectively prevents problems such as uneven cutting and misalignment of materials, reduces the scrap rate, and improves the equipment operation stability and production efficiency.

[0059] It can be understood that the displacement of the central friction wheel 330 causes the rotational tangent point of the first friction wheel 310, which is coaxial with the pressure roller 120, to shift. This shifts the contact point between the pressure roller 120 and the blade 132 of the cutting roller 130 from an area of ​​concentrated wear to an unworn area. This prevents a local area of ​​the pressure roller 120 from being subjected to long-term cutting pressure and friction, disperses the wear area of ​​the pressure roller 120, and extends the service life of the pressure roller 120.

[0060] Furthermore, the cutting of existing fully automatic die-cutting machines is usually in a vertical state, and cannot produce a cutting effect in an inclined state. Based on this, the differential assembly 300 also includes a length rod 370.

[0061] A first threaded rod extends upward from the upper wall surface of the second slider 240, and a forward thread is set on the first threaded rod. A second threaded rod extends downward from the lower wall surface of the second rack 350, and a reverse thread is set on the second threaded rod. The first threaded rod and the second threaded rod are coaxial and not connected.

[0062] The length rod 370 is sleeved on the first threaded rod and the second threaded rod. The inner wall of the length rod 370 is provided with a thread matching the forward thread and the reverse thread. By rotating the length rod 370, the second slider 240 and the second rack 350 can be driven away from or close to each other.

[0063] When the transmission ratio between the pressure roller 120 and the cutting roller 130 is changed, the linear speeds of the pressure roller 120 and the cutting roller 130 become unequal. As the material passes between the pressure roller 120 and the cutting roller 130, the material advances at different speeds where it contacts the pressure roller 120 and the cutting roller 130. At this point, during the rotary cutting process, the blade 132 mounted on the cutting roller 130 cuts the material at different speeds, causing the blade 132's path into the material to form an angled cut due to the speed difference, thus achieving angled cutting of the material.

[0064] When the transmission ratio between the pinch roller 120 and the cutting roller 130 needs to be changed, the operator rotates the pinch rod 140, releasing the axial restraint on the pinch roller 120 and allowing it to move freely up and down. The operator then rotates the length rod 370 to drive the second rack 350 and the second slider 240 away from each other. The linear motion of the second rack 350 then rotates the gear 360, guiding the first rack 340 downward. However, because the second friction wheel 320 supports the center friction wheel 330, the center friction wheel 330 cannot move downward, and thus the first rack 340 cannot move downward. Since the gear 360 is engaged with the first rack 340 and the second rack 350 at the same time, when the length rod 370 is rotated, the squeezing force of the first friction wheel 310 on the center friction wheel 330 gradually increases due to the action of the first rack 340, and the inclined surface of the outer wall of the first friction wheel 310 squeezes and guides the center friction wheel 330 to the left, so that the gear 360 connected to the center friction wheel 330 gradually moves upward. As a result, the midpoint of the two center friction wheels 330 is no longer horizontally collinear with the midpoint of the vertical line connecting the axis of the first friction wheel 310 and the axis of the second friction wheel 320, thereby changing the transmission ratio of the clamping roller 120 and the cutting roller 130.

[0065] It is understandable that by adjusting the transmission ratio of the pressing roller 120 and the cutting roller 130 and matching the blade 132 with a corresponding length, cutting effects with different inclination angles can be achieved.

[0066] It can be understood that when the cutting is in a vertical state and the cutting accuracy requirements are not high, the transmission ratio of the pressure roller 120 and the cutting roller 130 can be deviated from 1:1 by the length rod 370 for a period of time. After running in this way for a period of time, the transmission ratio of the pressure roller 120 and the cutting roller 130 is restored to 1:1, so that the linear speed difference between the pressure roller 120 and the cutting roller 130 converts the concentrated wear on the pressure roller 120 into uniform wear along the surface of the pressure roller 120, thereby improving the service life of the pressure roller 120.

[0067] In one embodiment, the differential assembly 300 further includes a nut 380 and a first elastic member 390 .

[0068] The connecting rod 131 is provided with a thread that cooperates with the nut 380. The first elastic member 390 is fixedly connected to the second friction wheel 320 and the support frame 110. The elastic force of the first elastic member 390 always makes the second friction wheel 320 and the support frame 110 move away from each other or have a tendency to move away from each other.

[0069] When the blades 132 on the cutting roller 130 become less sharp, the operator rotates the nut 380, causing it to move in the second direction away from the support frame 110. The compressed first elastic member 390 then pushes the second friction wheel 320 to slide along the connecting rod 131 away from the support frame 110. During this process, the pressure roller 120 and the two central friction wheels 330 move vertically downward. The downward movement of the pressure roller 120 compensates for the gap created by the reduced sharpness of the blades 132. The midpoint of the two central friction wheels 330 after downward movement is horizontally collinear with the midpoint of the perpendicular line connecting the axes of the first friction wheel 310 and the second friction wheel 320, ensuring that the linear velocities of the pressure roller 120 and the cutting roller 130 are equal.

[0070] Furthermore, to achieve quantitative adjustment, markings are provided on the nut 380, and angle scale markings are provided on the contact end surface of the second friction wheel 320 and the nut 380. The markings and angle scale markings allow the operator to precisely control the rotation angle of the nut 380 and calculate and control the downward movement distance of the pressure roller 120.

[0071] Furthermore, in order to prevent the two central friction wheels 330 from rotating around their centers, the moving assembly 200 further includes a second guide rail 220 , a third slider 260 and a transmission rod 270 .

[0072] The second guide rail 220 is vertically mounted on the support frame 110, and the third slider 260 can slide on the second guide rail 220 along the first direction. One end of the transmission rod 270 is fixedly connected to the two center friction wheels 330, and the other end of the transmission rod 270 is set as a square rod 271. A square groove matching the square rod 271 is set in the third slider 260, so that the square rod 271 is embedded in the square groove, and the square rod 271 can slide in the square groove along the second direction. The square groove prevents the square rod 271 from rotating circumferentially through the cross-sectional shape constraint, thereby preventing the two center friction wheels 330 from rotating around its center.

[0073] As the center friction wheel 330 moves along the inclined surface of the second friction wheel 320, it produces displacement in the first and second directions. At this time, the third slider 260 moves linearly downward along the second guide rail 220, and the square rod 271 of the transmission rod 270 slides within the square groove of the third slider 260. During this process, the square cross-section of the square groove ensures that the center friction wheel 330 maintains axial translation, preventing transmission failure caused by rotation or swinging of the center friction wheel 330.

[0074] Furthermore, the two central friction wheels 330 are configured as a wheel set, and the two wheel sets are symmetrically arranged between the first friction wheel 310 and the second friction wheel 320 .

[0075] When the transmission ratio of the cutting roller 130 and the pressure roller 120 needs to be adjusted, the two wheel sets move synchronously along the axial direction, changing the transmission ratio of the first friction wheel 310 and the second friction wheel 320. The second friction wheel 320 drives the first friction wheel 310 to rotate through the two wheel sets, and the two wheel sets also support the first friction wheel 310, improving the stability of the first friction wheel 310 during rotation.

[0076] In one embodiment, the moving assembly 200 and the differential assembly 300 are symmetrically arranged in two groups on both sides of the support frame 110 to improve the stability and reliability of the transmission system of the full-automatic die-cutting machine.

[0077] An embodiment of the present invention also includes an accessory for a fully automatic die-cutting machine, which is applied to a fully automatic die-cutting machine in any of the above embodiments. The accessory for the fully automatic die-cutting machine includes a conveying roller, which is used to convey the material between the cutting roller 130 and the pressure roller 120.

[0078] The technical features of the above embodiments can be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0079] The above-described embodiments merely illustrate several embodiments of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that a person skilled in the art would be able to make various modifications and improvements without departing from the spirit of the present invention, all of which fall within the scope of protection of the present invention. Therefore, the scope of protection of the present invention shall be determined by the appended claims.

Claims

1. A fully automatic die-cutting machine, characterized in that: It includes cutting roller, pressing roller, supporting frame, differential assembly and moving assembly; The pressing roller and the cutting roller are arranged parallel to each other on the support frame, and a slide groove is provided on the support frame, and the slide groove enables the pressing roller and the cutting roller to move away from or approach each other; The differential assembly is drivingly connected to the pressing roller and the cutting roller. When the sharpness of the blade on the cutting roller decreases, the pressing roller is driven closer to the cutting roller. The differential assembly is used to adjust the transmission ratio between the pressing roller and the cutting roller. The moving assembly includes a first guide rail, a first slider, and a second slider. The first guide rail is fixedly arranged on the support frame. The first slider can slide in the first guide rail along a first direction. The second slider is fixedly connected to the first guide rail. The first slider is rotatably connected to the pressure roller, and the first slider and the pressure roller move synchronously in the first direction. The second slider is rotatably connected to the cutting roller. The first direction is the direction of a perpendicular connecting line between the axis of the cutting roller and the axis of the pressure roller. A connecting rod extends from one end of the cutting roller, and the connecting rod is rotatably connected to the second slider at one end away from the cutting roller; the differential assembly includes a first friction wheel, a second friction wheel and two center friction wheels, and the first friction wheel and the second friction wheel are both provided with mutually matching inclined surfaces; the first friction wheel is fixedly connected to the pressure roller, and the first friction wheel is rotatably connected to the first slider at one end away from the pressure roller; the second friction wheel is sleeved on the connecting rod, the second friction wheel and the cutting roller rotate synchronously, and the second friction wheel can slide relative to the connecting rod along the second direction; the two center friction wheels are movably arranged between the first friction wheel and the second friction wheel, and the two center friction wheels are in contact with the inclined surfaces of the first friction wheel and the second friction wheel, and the transmission ratio of the first friction wheel and the second friction wheel is adjusted by changing the positions of the two center friction wheels; wherein the second direction is a direction parallel to the axis of the cutting roller; The differential assembly includes a first rack, a second rack, and a gear matched with the first rack and the second rack, the first rack being fixedly connected to the first slider, the second rack being connected to the second slider, the gear being rotatably connected to the central friction wheel, and the gear and the central friction wheel moving synchronously in the first direction; The differential assembly also includes a length rod, a forward thread is provided on the second slider, a reverse thread is provided on the second rack, and a thread is provided inside the length rod that matches the forward thread and the reverse thread. The second rack and the second slider are driven away from or towards each other by rotating the length rod.

2. The fully automatic die-cutting machine according to claim 1, characterized in that: The differential assembly also includes a nut and a first elastic member. The connecting rod is provided with a thread that matches the nut. The nut is located between the second slider and the second friction wheel. The nut is used to control the movement displacement of the second friction wheel in the second direction. The two ends of the first elastic member are respectively fixedly connected to the second friction wheel and the support frame. The elastic force of the first elastic member always makes the second friction wheel and the support frame move away from each other or have a tendency to move away from each other.

3. The fully automatic die-cutting machine according to claim 1, characterized in that: The moving assembly also includes a second guide rail, a third slider and a transmission rod. The second guide rail is fixedly arranged on the support frame, the third slider is slidably connected to the second guide rail, one end of the transmission rod is fixedly connected to the central friction wheel, and the other end of the transmission rod is set as a square rod. A square groove matching the square rod is set in the third slider, and the square rod is slidably connected to the square groove.

4. The fully automatic die-cutting machine according to claim 1, characterized in that: The two central friction wheels are arranged as a wheel set, and two wheel sets are arranged between the first friction wheel and the second friction wheel.

5. The fully automatic die-cutting machine according to claim 1, characterized in that: The moving assembly and the differential assembly are both provided in two groups.

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