Full-automatic die-cutting machine and accessories thereof

Abstract

The invention provides a full-automatic die-cutting machine and accessories thereof, and the full-automatic die-cutting machine comprises a moving assembly and a differential assembly. After the sharpness of the blade on the cutting roller is reduced, the moving assembly enables the pressing roller to move downwards vertically, the distance between the pressing roller and the cutting roller is shortened so as to compensate for the gap generated when the sharpness of the blade is reduced, and the blade with the sharpness slightly reduced can still keep the pressing and cutting force similar to the initial state. Therefore, the service life of the blade is prolonged, and the replacement frequency and production cost of the blade are reduced. Meanwhile, the linear speed difference between the pressing roller and the cutting roller can be caused by downward movement of the pressing roller, namely, the transmission ratio of the pressing roller to the cutting roller is changed, the transmission ratio of the pressing roller to the cutting roller is adjusted through the differential assembly, and it is ensured that after the position of the pressing roller is changed, the transmission ratio of the pressing roller to the cutting roller can be restored to the initial state; and it is guaranteed that the materials are always kept flat and stable in the cutting process, and the product quality defect caused by speed mismatching is effectively avoided.

Description

Technical Field

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

[0002] A fully automatic die-cutting machine is a key equipment in the packaging and printing industry. It is mainly used to accurately cut and indent flexible materials such as printed paper, leather, and plastic according to a pre-designed shape, and is widely used in the processing and production of products such as cartons, color boxes, trademarks, and greeting cards.

[0003] Before starting the fully automatic die-cutting machine, the operator needs to first install the material to be processed on the feeding device, and then pass the material through the gap between the pressing roller and the cutting roller in sequence and fix it on the receiving device. Set parameters such as cutting size and speed in the control system, and at the same time check the stability of the blade installation on the cutting roller. When the fully automatic die-cutting machine is running, the feeding device releases the material at a constant speed, and the pressing roller applies pressure through a cylinder or a spring to tightly press the material on the surface of the cutting roller to ensure that the material is flat and does not slip during cutting. The cutting roller rotates at a high speed driven by a motor, and the blade installed on the cutting roller rotates with the cutting roller. The blade cooperates with the pressing roller to continuously cut the material. After cutting is completed, the receiving device rolls up and collects the finished material, and the waste material is discharged through the waste collection device.

[0004] However, in the existing fully automatic die-cutting machine, when the sharpness of the blade decreases, the cutting gap between the blade edge and the pressing roller will increase, affecting the cutting accuracy. Since the structural design of the pressing roller and the cutting roller usually adopts a fixed installation method, it is difficult to correct the blade position through fine adjustment. Even if the sharpness of the blade decreases slightly, it cannot be used continuously and can only be replaced as a whole, resulting in a large number of blades being discarded, which not only increases the consumable cost, but also affects the production efficiency due to frequent blade replacement. Summary of the Invention

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

[0006] The above object is achieved by the following technical solutions: A fully automatic die-cutting machine includes a cutting roller, a pressing roller, a support frame, and a differential assembly.

[0007] The pressing roller is arranged parallel to the cutting roller on the support frame, and a chute is arranged on the support frame, and the chute enables the pressing roller and the cutting roller to move away from or close to each other.

[0008] 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, it drives the pressing roller to approach the cutting roller, and the differential assembly is used to adjust the transmission ratio between the pressing roller and the cutting roller.

[0009] Furthermore, it further includes a moving assembly. 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 rotationally connected to the pressing roller, and the first slider and the pressing 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 perpendicular connecting line of the axes of the cutting roller and the pressing roller.

[0010] Furthermore, one end of the cutting roller extends out a connecting rod. The end of the connecting rod away from the cutting roller is rotationally connected to the second slider. The differential assembly includes a first friction wheel, a second friction wheel, and two central friction wheels. The first friction wheel and the second friction wheel are both provided with mutually cooperating inclined surfaces. The first friction wheel is fixedly connected to the pressing roller. The end of the first friction wheel away from the pressing roller is rotationally connected to the first slider. The second friction wheel is sleeved on the connecting rod. The second friction wheel and the cutting roller rotate synchronously. The second friction wheel can relatively slide along a second direction with respect to the connecting rod. The two central friction wheels are movably arranged between the first friction wheel and the second friction wheel. The two central friction wheels are in contact with the inclined surfaces of the first friction wheel and the second friction wheel, and the transmission ratio between the first friction wheel and the second friction wheel is adjusted by changing the positions of the two central friction wheels. Wherein, the second direction is the direction parallel to the axis of the cutting roller.

[0011] Furthermore, the differential assembly includes a first rack, a second rack, and a gear that cooperates with 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 rotationally connected to the central friction wheel. The gear and the central friction wheel move synchronously in the first direction.

[0012] Furthermore, the differential assembly further includes a length rod. The second slider is provided with a forward thread. The second rack is provided with a reverse thread. The inside of the length rod is provided with threads that cooperate with the forward thread and the reverse thread. By rotating the length rod, the second rack and the second slider are driven to move away from or close to each other.

[0013] Further, the differential assembly further includes a nut and a first elastic member. A thread cooperating with the nut is provided on the connecting rod. The nut is located between the second slider and the second friction wheel. The nut is used to control the moving displacement of the second friction wheel in the second direction. 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 tend to move away from each other.

[0014] Further, the moving assembly further 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. The other end of the transmission rod is provided as a square rod. A square groove cooperating with the square rod is arranged in the third slider. The square rod is slidably connected to the square groove.

[0015] Further, two of the central friction wheels are set as a set of wheels. Two sets of such wheels are arranged between the first friction wheel and the second friction wheel.

[0016] Further, both the moving assembly and the differential assembly are provided in two sets.

[0017] The present invention also provides an accessory for a full-automatic die-cutting machine, which is applied to the full-automatic die-cutting machine described in any one of the above. The accessory includes a conveying roller, and the conveying roller is used to convey materials between the cutting roller and the pressing roller.

[0018] The beneficial effects of the present invention are as follows: The present invention provides a full-automatic die-cutting machine and its accessory. Among them, the full-automatic die-cutting machine includes a moving assembly and a differential assembly. When the sharpness of the blade on the cutting roller decreases, the pressing roller is moved downward in the vertical direction through the moving assembly, and the distance between the pressing roller and the cutting roller is shortened to compensate for the gap generated by the decrease in the sharpness of the blade, so that the blade with slightly reduced sharpness can still maintain a cutting force similar to the initial state, thereby prolonging the overall service life of the blade and reducing the replacement frequency and production cost of the blade. The downward movement of the pressing roller will cause a change in the linear speed ratio between the pressing roller and the cutting roller, that is, a change in the transmission ratio. If not adjusted, it is easy to cause problems such as asynchronous material conveying and cutting, and cutting misalignment. Therefore, the transmission ratio between the pressing roller and the cutting roller is adjusted through the differential assembly to ensure that after the position of the pressing roller changes, the transmission ratio between the pressing 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 of the Drawings

[0019] Figure 1Structural schematic diagram of a full-automatic die-cutting machine according to an embodiment of the present invention; Figure 2 Front view of a full-automatic die-cutting machine provided by an embodiment of the present invention; Figure 3 is Figure 2 Schematic diagram of the A-A cross-section of the full-automatic die-cutting machine in; Figure 4 is Figure 3 Partial enlarged view at C in; Figure 5 Side view of a full-automatic die-cutting machine provided by an embodiment of the present invention; Figure 6 is Figure 5 Schematic diagram of the B-B cross-section of the full-automatic die-cutting machine in; Figure 7 is Figure 6 Partial enlarged view at D in; Figure 8 is Figure 6 Partial enlarged view at E in; Figure 9 is Figure 6 Partial enlarged view at F in; Figure 10 Exploded view of a full-automatic die-cutting machine according to an embodiment of the present invention; Figure 11 is Figure 10 Partial enlarged view at G in; Figure 12 is Figure 11 Partial enlarged view at H in; Figure 13 is Figure 11 Partial enlarged view at I in.

[0020] Wherein: 110, support frame; 111, chute; 120, pressing roller; 130, cutting roller; 131, connecting rod; 132, blade; 133, pressing block; 134, locking screw; 135, top screw; 140, pressing rod; 150, pressing bearing; 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; 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 implementation manners

[0021] In order to make the objectives, 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 used to limit the present invention.

[0022] The serial numbers assigned to the components herein, such as "first", "second", etc., are only used to distinguish the described objects and do not have any sequential or technical meanings. The "connection" and "coupling" mentioned in the present invention, unless otherwise specified, both include direct and indirect connections (couplings). In the description of the present invention, it should be understood that the orientation or positional relationships indicated by the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. are based on the orientation or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be construed as a limitation to the present invention.

[0023] In the present invention, unless otherwise clearly specified and defined, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may be that the first feature is directly above or obliquely above the second feature, or simply indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "underneath" the second feature may be that the first feature is directly below or obliquely below the second feature, or simply indicates that the first feature has a lower horizontal height than the second feature.

[0024] The following refers to Figures 1 to 13 a fully automatic die-cutting machine provided by an embodiment of the present invention.

[0025] 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.

[0026] The support frame 110, as the basic frame structure of the device, is fixedly installed on the ground or other fixed workbenches to provide stable support for other components.

[0027] 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 tightly attach the material to be cut to the surface of the cutting roller 130 by pressure, prevent the material from sliding during the cutting process, and ensure the cutting accuracy.

[0028] A detachable blade 132 is mounted on the outer circumferential surface of the cutting roller 130. The cutting roller 130 rotates at a high speed driven by a motor and cooperates with the pressing roller 120 to complete the cutting and indentation operations on the material. The cutting roller 130 ensures the stability and cutting accuracy when the blade 132 rotates. Connecting rods 131 extend from both ends of the cutting roller 130. The cutting roller 130 is rotationally connected to the support frame 110 through the connecting rods 131. The connecting rods 131 are used to transmit the power of the motor to ensure that the cutting roller 130 can rotate stably.

[0029] The cutting roller 130 is provided with a blade 132 and a pressing block 133. The blade 132, as the core execution component of the full-automatic die-cutting machine, directly undertakes the cutting and indentation work on cutting materials such as paper and plastic. The pressing block 133 is usually set as a wedge-shaped block. The pressing block 133 is used to firmly fix the blade 132 on the cutting roller 130 to ensure that the blade 132 does not displace or loosen during high-speed rotation and cutting, and to ensure cutting stability and safety. When disassembling the blade 132, loosen multiple locking screws 134 on the pressing block 133 to release the fixing force of the pressing block 133 on the blade 132, and then turn the jacking screw 135 located inside the pressing block 133 so that the jacking screw 135 approaches the rotation axis of the cutting roller 130, thereby causing the jacking screw 135 to push against the cutting roller 130 and push the pressing block 133 outwards, so as to reduce the clamping force of the pressing block 133 on the blade 132. The operator directly takes out the old blade 132 with reduced sharpness that cannot be used again from both sides of the pressing block 133, then puts the new blade 132 between the pressing block 133 and the cutting roller 130, resets the pressing block 133, first rotates the jacking screw 135 away from the rotation axis of the cutting roller 130, and then tightens multiple locking screws 134 to achieve the stable fixation of the blade 132 through the structural characteristics of the wedge-shaped pressing block 133.

[0030] The pressing rods 140 are symmetrically distributed on the upper sides of both sides of the pressing roller 120. One end of the pressing rod 140 abuts against the pressing bearing 150 to apply pressure to the pressing roller 120. An elastic member is provided between the pressing rod 140 and the pressing bearing 150. The elastic force of the elastic member always makes the pressing rod 140 and the pressing bearing 150 move away from each other or tend to move away from each other. By manually turning or adjusting the length of the pressing rod 140 through the control system, the pressure of the pressing roller 120 on the cutting material is controlled to ensure that appropriate pressing force is applied to materials of different materials and thicknesses.

[0031] However, most existing fully automatic die-cutting machines fix the pressing roller 120 and the cutting roller 130 in a fixed installation manner, so that a gap for the material to pass through is formed between the blade 132 on the cutting roller 130 and the pressing roller 120. 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 with reduced sharpness and adjust the gap for the material to pass through. Only the blade 132 can be replaced, resulting in a large number of blades 132 with slightly reduced sharpness being discarded. Premature replacement of the blade 132 greatly increases the procurement cost and maintenance cost of the blade 132 for the enterprise, and frequent downtime for replacing the blade 132 reduces production efficiency. If in order to compensate for the gap generated by the reduction in the sharpness of the blade 132, the pressing roller 120 is directly controlled to move downward to shorten the distance from the cutting roller 130, although the cutting pressure can be restored, it will cause a change in the original transmission radius ratio between the pressing roller 120 and the cutting roller 130, that is, the transmission ratio changes. The change in the transmission ratio caused by the downward movement of the pressing roller 120 will lead to quality problems such as material cutting misalignment and surface wrinkles, increasing the scrap rate.

[0032] Based on this, the fully automatic die-cutting machine provided by the embodiment of the present invention includes a differential assembly 300 and a moving assembly 200.

[0033] Specifically, the direction in which the pressing roller 120 points 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.

[0034] A chute 111 is provided on the support frame 110. The rotating shaft of the pressing roller 120 extends towards both ends, and the rotating shaft of the pressing roller 120 can move up and down along the first direction in the chute 111.

[0035] 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 and fixedly arranged on the support frame 110. The first slider 230 is rotatably connected to the rotating shaft of the pressing roller 120. The first slider 230 is embedded in the first guide rail 210 to drive the pressing roller 120 to slide along the first direction. The second slider 240 is fixedly connected to the first guide rail 210, and the second slider 240 is rotatably connected to the connecting rod 131 extending from the cutting roller 130.

[0036] 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.

[0037] The first friction wheel 310 and the second friction wheel 320 are provided with cooperating inclined planes. The first friction wheel 310 is fixedly connected to the rotating shaft of the pressing roller 120, and the first friction wheel 310 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 connected by a spline, so that the second friction wheel 320 can slide relative to the connecting rod 131 in the second direction, and the second friction wheel 320 rotates synchronously with the cutting roller 130.

[0038] Two central friction wheels 330 are movably arranged between the first friction wheel 310 and the second friction wheel 320. The two central friction wheels 330 are respectively in contact with the first friction wheel 310 and the second friction wheel 320, so that the cutting roller 130 drives the pressing roller 120 to rotate through the two central friction wheels 330, and the two central friction wheels 330 always support the pressing 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 pressing roller 120 and the cutting roller 130. When the midpoint of the two central friction wheels 330 is collinear with the midpoint of the vertical connection line between the axis of the first friction wheel 310 and the axis of the second friction wheel 320 in the horizontal direction, the contact radii of the first friction wheel 310 and the second friction wheel 320 with the central friction wheels 330 are equal, so that the linear velocities of the pressing roller 120 and the cutting roller 130 are the same, that is, the transmission ratio is 1:1.

[0039] The first slider 230 extends downward to form a first rack 340, and the second slider 240 extends upward to form a second rack 350. The gear 360 meshes with the first rack 340 and the second rack 350. The gear 360 is rotatably connected to the central friction wheel 330, and the gear 360 and the central 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 used to make the displacement ratio of the central friction wheel 330 and the first friction wheel 310 moving downward be 1:2, so that after the second friction wheel 320 completes the movement, the midpoint of the two central friction wheels 330 is collinear with the midpoint of the vertical connection line between the axis of the first friction wheel 310 and the axis of the second friction wheel 320 in the horizontal direction.

[0040] When the sharpness of the blade 132 on the cutting roller 130 is slightly reduced, the operator slides the second friction wheel 320 along the connecting rod 131 in 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 pressing roller 120 will move downward in the first direction, reducing the distance between the pressing roller 120 and the cutting roller 130, and restoring the cutting pressure of the blade 132 on the material. However, at this time, the linear speed ratio between the pressing roller 120 and the cutting roller 130 changes. During this process, if the pressing roller 120 drives the first slider 230 to move downward by a displacement of 2 units, due to the fixed second rack 350 and the transmission action of the first rack 340 and the second rack 350 on the gear 360, the gear 360 and the central friction wheel 330 connected to the gear 360 move downward synchronously by a displacement of 1 unit. At this time, the midpoint of the two central friction wheels 330 is collinear with the midpoint of the vertical connection line of the axes of the first friction wheel 310 and the second friction wheel 320 in the horizontal direction, and the linear speeds of the pressing roller 120 and the cutting roller 130 are equal again, that is, the transmission ratio is restored to 1:1. Thus, the change in the transmission ratio caused by the downward movement of the pressing roller 120 is compensated, ensuring that the linear speeds of the pressing roller 120 and the cutting roller 130 are matched.

[0041] Thus, through the moving assembly 200, the pressing roller 120 can move downward to compensate for the gap generated by the reduction in the sharpness of the blade 132. Through the differential assembly 300, the change in the transmission ratio caused by the downward movement of the pressing roller 120 is prevented, enabling the continued use of the blade 132 after its sharpness is slightly reduced, 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 the material, reduces the rejection rate, and improves the operating stability and production efficiency of the equipment.

[0042] It can be understood that the displacement of the central friction wheel 330 causes an offset of the rotation tangent point of the first friction wheel 310 coaxial with the pressing roller 120, causing the contact point between the pressing roller 120 and the blade 132 of the cutting roller 130 to shift from the wear concentration area to the unworn area. Thus, the local long-term bearing of the cutting pressure and friction by the pressing roller 120 is avoided, the wear area of the pressing roller 120 is decentralized, and the service life of the pressing roller 120 is extended.

[0043] Furthermore, the cutting of the existing fully automatic die-cutting machine is usually in a vertical state and cannot produce an inclined cutting effect. Based on this, the differential assembly 300 further includes a length rod 370.

[0044] A first threaded rod extends upward from the upper wall surface of the second slider 240, a forward thread is provided on the first threaded rod, a second threaded rod extends downward from the lower wall surface of the second rack 350, a reverse thread is provided on the second threaded rod, and the first threaded rod and the second threaded rod are coaxial and not connected.

[0045] The length rod 370 is sleeved on the first threaded rod and the second threaded rod. Threads matching the forward thread and the reverse thread are provided on the inner wall of the length rod 370. By rotating the length rod 370, the second slider 240 and the second rack 350 can be driven to move away from or close to each other.

[0046] When the transmission ratio of the pressing roller 120 and the cutting roller 130 changes, the linear speeds of the pressing roller 120 and the cutting roller 130 are not equal. When the material passes between the pressing roller 120 and the cutting roller 130, there is a difference in the advancing speeds of the parts of the material in contact with the pressing roller 120 and the parts in contact with the cutting roller 130. At this time, during the rotary cutting process of the blade 132 mounted on the cutting roller 130, due to the different advancing speeds of the various parts of the material, the trajectory of the blade 132 cutting into the material forms an inclination angle with the speed difference, thereby realizing the inclined cutting of the material.

[0047] When it is necessary to change the transmission ratio of the pressing roller 120 and the cutting roller 130, the operator rotates the pressing rod 140 to release the axial constraint on the pressing roller 120, so that the pressing roller 120 can move freely up and down. Then, by rotating the length rod 370, the second rack 350 is driven to move away from the second slider 240. At this time, the linear motion of the second rack 350 drives the gear 360 to rotate, guiding the first rack 340 to move downward. However, since the second friction wheel 320 supports the central friction wheel 330, the central friction wheel 330 cannot move downward, resulting in the first rack 340 being unable to move downward. Since the gear 360 meshes with the first rack 340 and the second rack 350 at the same time, when the length rod 370 is rotated, the extrusion force of the first friction wheel 310 on the central friction wheel 330 gradually increases due to the action of the first rack 340. The inclined surface on the outer side wall of the first friction wheel 310 squeezes and guides the central friction wheel 330 to the left, causing the gear 360 connected to the central friction wheel 330 to gradually move upward. Thus, the midpoints of the two central friction wheels 330 are no longer collinear horizontally with the midpoint of the vertical connection line of the axes of the first friction wheel 310 and the second friction wheel 320, thereby changing the transmission ratio of the pressing roller 120 and the cutting roller 130.

[0048] It can be understood that by adjusting the transmission ratio of the pressing roller 120 and the cutting roller 130 and matching the blades 132 with corresponding lengths, cutting effects with different inclination angles can be achieved.

[0049] It can be understood that in the case where the cutting is in a vertical state and the requirement for cutting accuracy is not high, the transmission ratio of the pressing roller 120 and the cutting roller 130 can deviate from 1:1 for a period of time through the length rod 370. After running for a period of time like this, the transmission ratio of the pressing roller 120 and the cutting roller 130 is restored to 1:1, so that the linear velocity difference between the pressing roller 120 and the cutting roller 130 converts the concentrated wear on the pressing roller 120 into uniform wear along the surface of the pressing roller 120, thereby improving the service life of the pressing roller 120.

[0050] In one embodiment, the differential assembly 300 further includes a nut 380 and a first elastic member 390.

[0051] 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 tend to move away from each other.

[0052] When the sharpness of the blade 132 on the cutting roller 130 decreases, the operator rotates the nut 380 to make the nut 380 move in the second direction away from the support frame 110. At this time, the compressed first elastic member 390 pushes the second friction wheel 320 to slide along the connecting rod 131 away from the support frame 110. During this process, the pressing roller 120 and the two central friction wheels 330 move vertically downward. After the pressing roller 120 moves downward, it compensates for the gap generated by the decrease in the sharpness of the blade 132. The midpoint of the two central friction wheels 330 after moving downward is collinear in the horizontal direction with the midpoint of the vertical connection line of the axes of the first friction wheel 310 and the second friction wheel 320, so that the linear velocities of the pressing roller 120 and the cutting roller 130 are equal.

[0053] Furthermore, for quantitative adjustment, a mark is set on the nut 380, and angle scale marks are set on the contact end face between the second friction wheel 320 and the nut 380. The operator can precisely control the rotation angle of the nut 380 through the mark and the angle scale marks, and calculate and control the downward movement distance of the pressing roller 120.

[0054] 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.

[0055] The second guide rail 220 is vertically installed on the support frame 110. The third slider 260 can slide on the second guide rail 220 in the first direction. One end of the transmission rod 270 is fixedly connected to two central friction wheels 330. The other end of the transmission rod 270 is provided as a square rod 271. A square groove matching with the square rod 271 is arranged 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 in the second direction. The square cross-section of the square groove prevents the square rod 271 from rotating circumferentially, thereby preventing the two central friction wheels 330 from rotating around their centers.

[0056] When the central friction wheel 330 moves along the inclined plane of the second friction wheel 320, displacements in the first direction and the second direction will be generated. At this time, the third slider 260 moves straight down along the second guide rail 220, and the square rod 271 of the transmission rod 270 slides in the square groove of the third slider 260. During this process, the square cross-section of the square groove keeps the central friction wheel 330 translating axially all the time, avoiding the transmission failure caused by the rotation or swing of the central friction wheel 330.

[0057] Further, the two central friction wheels 330 are set as a group of wheel sets, and two groups of wheel sets are symmetrically arranged between the first friction wheel 310 and the second friction wheel 320.

[0058] When the transmission ratio between the cutting roller 130 and the pressing roller 120 needs to be adjusted, the two groups of wheel sets move synchronously along the axial direction to change the transmission ratio between 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 groups of wheel sets, and the two groups of wheel sets support the first friction wheel 310 at the same time, improving the stability of the first friction wheel 310 during rotation.

[0059] In one embodiment, the moving assembly 200 and the differential assembly 300 are symmetrically arranged as two groups on both sides of the support frame 110, improving the stability and reliability of the transmission system of the full-automatic die-cutting machine.

[0060] The embodiment of the present invention further includes an accessory for a full-automatic die-cutting machine, which is applied to a full-automatic die-cutting machine in any one of the above embodiments. The accessory for the full-automatic die-cutting machine includes a conveying roller, and the conveying roller is used to convey materials between the cutting roller 130 and the pressing roller 120.

[0061] The technical features of the above embodiments can be combined arbitrarily. For the sake of concise description, 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, it should be considered as the scope recorded in this specification.

[0062] The above-described embodiments merely represent several implementation manners of the present invention. The description thereof is relatively specific and detailed, but it should not be construed as a limitation on the scope of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several modifications and improvements can still be made, and these all fall within the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the appended claims.

Claims

1. A fully automatic die-cutting machine, characterized in that, It includes a cutting roller, a pressing roller, a support frame and a differential assembly; The pressing roller and the cutting roller are arranged on the support frame in parallel, and a slide groove is arranged 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 pressure roller and the cutting roller. When the sharpness of the blade on the cutting roller decreases, the pressure roller is driven to approach the cutting roller. The differential assembly is used to adjust the transmission ratio between the pressure roller and the cutting roller.

2. The full-automatic die-cutting machine according to claim 1, characterized in that, 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 in the first guide rail along a first direction, 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 a vertical connection line between the axis of the cutting roller and the axis of the pressure roller.

3. The full-automatic die-cutting machine according to claim 2, wherein, A connecting rod extends from one end of the cutting roller, and an end of the connecting rod away from the cutting roller is rotatably connected to the second slider; the differential assembly includes a first friction wheel, a second friction wheel and two central 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 clamping roller, and an end of the first friction wheel away from the clamping roller is rotatably connected to the first slider; 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. 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.

4. The full-automatic die-cutting machine according to claim 3, characterized in that 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 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.

5. A fully automatic die-cutting machine according to claim 4, characterized in that, The differential assembly also includes a length rod, the second slider is provided with a forward thread, the second rack is provided with a reverse thread, and the length rod is provided with a thread matching the forward thread and the reverse thread. The second rack and the second slider are driven to move away from or closer to each other by rotating the length rod.

6. The full-automatic die cutting machine according to claim 3, characterized in that, The differential assembly further includes a nut and a first elastic member. A thread cooperating with the nut is provided on the connecting rod. The nut is located between the second slider and the second friction wheel. The nut is used to control the moving displacement of the second friction wheel in the second direction. 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 tend to move away from each other.

7. A fully automatic die-cutting machine according to claim 3, characterized in that, The moving assembly further 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. The other end of the transmission rod is arranged as a square rod. A square groove cooperating with the square rod is arranged in the third slider. The square rod is slidably connected to the square groove.

8. The full-automatic die-cutting machine according to claim 3, characterized in that, The two central friction wheels are set as a set of wheel groups. Two sets of the wheel groups are arranged between the first friction wheel and the second friction wheel.

9. An automatic die cutting machine according to claim 2, characterized in that, Both the moving assembly and the differential assembly are provided in two sets.

10. An accessory for a full-automatic die-cutting machine, which is applied to the full-automatic die-cutting machine according to any one of the above-mentioned claims 1-9, and is characterized in that, It includes a conveying roller, and the conveying roller is used to convey materials between the cutting roller and the pressing roller.

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