Feeding device of die-cutting machine

Abstract

The utility model relates to the technical field of die-cutting paper feeding, in particular to a feeding device of a die-cutting machine, which comprises two support frames, a feeding mechanism and a paper feeding mechanism. A feeding roller assembly and a discharging roller assembly; the first knurling roller is rotatably arranged on the supporting frame; the first driving mechanism is connected with the first knurling roller; the second knurling roller and the third knurling roller are coaxially and rotatably arranged on the supporting frame; the second driving mechanism is connected with the second knurling roller and the third knurling roller; the synchronous driving mechanism is arranged corresponding to the second knurling roller, is arranged on one side, far away from the first knurling roller, of the second knurling roller, and is used for driving the paper to move; the supporting roller set is arranged on the lower sides of the first knurling roller, the second knurling roller, the third knurling roller and the synchronous driving mechanism and used for supporting paper. The utility model discloses a feeding device of a die-cutting machine, and aims to solve the problems that the continuity of a die-cutting process and the qualified rate of finished products are influenced by material fixing failure caused by vibration or transmission deviation of an existing feeding device.

Description

TECHNICAL FIELD

[0001] The utility model relates to die cutting paper feeding technology field, and more specifically, it relates to a feeding device of die cutting machine. BACKGROUND

[0002] The feeding device of die cutting machine is the core component of automatic processing equipment, and its positioning accuracy and conveying stability directly affect the finished product quality of die cutting process. The traditional die cutting machine generally adopts the structure of single shaft drive cooperating with friction roller group, and the main transmission shaft is driven by the motor to make the multiple roller cylinders rotate synchronously to complete paper conveying. Although this mechanical linkage scheme can guarantee the basic feeding function, speed deviation between different roller groups is easy to occur during high-speed operation, which leads to paper deviation or uneven tension.

[0003] In the prior art, rigid couplings or gear sets are often used to realize mechanical coupling to solve the problem of multi-roller synchronization, but such structures have defects such as response lag and poor wear compensation. When processing paper of different thicknesses or materials, local slippage is easy to occur due to the difference in contact pressure of each roller cylinder, especially during wide face feeding, the difference in friction coefficient on both sides of the paper will cause snake-shaped deviation. In addition, the passive follow-up design of the traditional support roller group is difficult to adapt to high-speed turning conditions, and wrinkles are easy to occur during sudden stop or acceleration.

[0004] In view of the above technical bottlenecks, the industry has begun to try a solution combining split drive and active control. By configuring independent drive units for roller cylinders in different areas and introducing a closed-loop feedback system to adjust the speed difference, the dynamic response performance can be theoretically improved. However, the existing split drive structure often has problems such as high mechanism redundancy and complex synchronous control algorithm, and the stress balance of the paper under the cooperation of multiple rollers is not fully considered, resulting in a significant increase in equipment cost and maintenance difficulty. How to build a simple and reliable multi-drive cooperative system has become a technical difficulty that needs to be broken through in the field of feeding devices of die cutting machines. UTILITY MODEL CONTENTS

[0005] The main purpose of the utility model is to provide a feeding device of die cutting machine, which aims to solve the problem of material fixation failure caused by vibration or transmission deviation of the existing feeding device, affecting the continuity of the die cutting process and the finished product qualification rate.

[0006] In order to solve the above technical problems, a feeding device of die cutting machine is provided, which comprises: two support frames, symmetrically arranged;

[0007] The feeding roller assembly and the discharging roller assembly are arranged at the two ends of the two support frames;

[0008] The first knurled roller is rotatably arranged on the support frame and is arranged on the side close to the feeding roller assembly, and the first knurled roller is used to drive the paper to move in the direction of the discharging roller assembly.

[0009] A first driving mechanism is connected with the first knurled roller for driving the first knurled roller to rotate;

[0010] A second knurled roller and a third knurled roller are coaxially and rotatably arranged on the support frame and are arranged on a side of the first knurled roller away from the feeding roller assembly, and the second knurled roller and the third knurled roller are used for driving the paper to move towards the direction of the discharging roller assembly;

[0011] A second driving mechanism is connected with the second knurled roller and the third knurled roller for driving the second knurled roller or the second knurled roller and the third knurled roller to rotate;

[0012] A synchronous driving mechanism is arranged corresponding to the second knurled roller and is arranged on a side of the second knurled roller away from the first knurled roller for driving the paper to move;

[0013] A support roller set is arranged on the lower side of the first knurled roller, the second knurled roller, the third knurled roller and the synchronous driving mechanism for supporting the paper.

[0014] In any of the above technical solutions, further comprising:

[0015] An upper cover plate is arranged on the upper side of the first knurled roller, the second knurled roller, the third knurled roller and the synchronous driving mechanism;

[0016] A lower cover plate is arranged on the lower side of the support roller set and has a spacing with the upper cover plate;

[0017] A negative pressure mechanism is arranged on the upper cover plate and communicates with the space between the upper cover plate and the lower cover plate;

[0018] Two ventilation holes are arranged at positions corresponding to the spacing between the upper cover plate and the lower cover plate of the two support frames.

[0019] In any of the above technical solutions, further, the third knurled roller is symmetrically arranged as two about the second knurled roller, and the negative pressure mechanism is arranged as three corresponding to the second knurled roller and the two third knurled rollers.

[0020] In any of the above technical solutions, further comprising:

[0021] Two partition pieces are symmetrically arranged on the lower side of the upper cover plate and are arranged corresponding to the connection positions of the second knurled roller and the third knurled roller, and the partition pieces are used for adjusting the airflow direction between the upper cover plate and the lower cover plate.

[0022] In any of the above technical solutions, further comprising:

[0023] The synchronous driving mechanism comprises two symmetrical synchronous belts, and two adjusting members are symmetrically arranged on the two supporting frames and correspond to the two synchronous belts respectively.

[0024] In any of the above technical solutions, further comprising a plurality of toothed plates, the plurality of toothed plates are uniformly arranged on the two synchronous belts, and the toothed plates are used to abut against the paper and drive the paper to move in the direction of the discharge roller assembly.

[0025] In any of the above technical solutions, further, the supporting roller group comprises:

[0026] A first unpowered roller group corresponding to the second knurled roller;

[0027] A second unpowered roller group corresponding to the third knurled roller;

[0028] The second unpowered roller group comprises a plurality of first driven rollers and a plurality of second driven rollers, and each first driven roller and each second driven roller are coaxially arranged one by one.

[0029] In any of the above technical solutions, further, the second driving mechanism comprises:

[0030] A driving motor arranged on the upper side of the second knurled roller;

[0031] A connecting assembly connected with the driving motor and the second knurled roller respectively;

[0032] A clutch arranged between the second knurled roller and the third knurled roller;

[0033] A controller electrically connected with the clutch and used for controlling the opening and closing of the clutch.

[0034] The beneficial effects are:

[0035] 1. The feeding device of the die-cutting machine, through the partition driving design of the first knurled roller and the second / third knurled roller, combined with synchronous belt toothed plate pushing, realizes multi-section accurate traction of the paper, eliminates the cumulative error in high-speed running, improves the feeding straightness, and improves the driving efficiency by more than 30% compared with the traditional single-shaft driving.

[0036] 2. The unpowered roller is layered and arranged in cooperation with the airflow adsorption of the negative pressure mechanism, effectively balances the paper tension and suppresses the wrinkles, and is suitable for stable conveying of materials with different thicknesses of 0.1-3mm.

[0037] 3. The clutch-controlled second driving mechanism can switch single roll / double roll driving modes according to working conditions, thereby reducing energy consumption and enhancing compatibility with special-shaped materials. BRIEF DESCRIPTION OF DRAWINGS

[0038] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments or the prior art description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor on the basis of these drawings.

[0039] Figure 1 is a three-dimensional structure schematic diagram of the feeding device of the die-cutting machine according to an embodiment of the present application;

[0040] Figure 2 is a partial structure schematic diagram of the feeding device of the die-cuting machine according to an embodiment of the present application.

[0041] The following is an explanation of the reference signs:

[0042] 1. Support frame;

[0043] 2. Feeding roller assembly;

[0044] 3. Discharge roller assembly;

[0045] 4. First knurled roller;

[0046] 5. First driving mechanism;

[0047] 6. Second knurled roller;

[0048] 7. Third knurled roller;

[0049] 8. Second driving mechanism; 801. Driving motor; 802. Connecting assembly; 803. Clutch;

[0050] 9. Synchronous driving mechanism; 901. Synchronous belt; 902. Toothed plate;

[0051] 10. Support roller group; 1001. First unpowered roller group; 1002. Second unpowered roller group; 1003. First driven roller; 1004. Second driven roller;

[0052] 11. Upper cover plate;

[0053] 12. Lower cover plate;

[0054] 13. Negative pressure mechanism;

[0055] 14. Partition;

[0056] 15. Adjusting member. DETAILED DESCRIPTION

[0057] Hereinafter, the example embodiments according to the present application will be described in detail with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present application, and thus are not to limit the present application, and all the other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present application without creative effort fall into the scope of the present application.

[0058] It should be noted that, as shown in the present application and claims, unless the context clearly indicates otherwise, the words "one", "a", "an", and / or "the" do not mean to specify a single number, but also can include a plurality. Generally speaking, the terms "comprise" and "include" only indicate the inclusion of the steps and elements explicitly identified, and these steps and elements do not constitute an exclusive list, and the method or device can also include other steps or elements.

[0059] If the present application embodiments involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement condition, etc. between the components in a certain specific posture (as shown in the drawings), if the specific posture changes, the directional indications also change accordingly.

[0060] In the present application, unless otherwise specifically defined and limited, the terms "connection", "fixing", etc. should be understood broadly, for example, "fixing" can be fixed connection, or can be detachable connection, or can be integrated; can be mechanical connection, or can be electrical connection; can be directly connected, or can be indirectly connected through an intermediate medium; can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise specifically limited. For a person of ordinary skill in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0061] In addition, if the description of "first", "second" and the like is involved in the embodiments of the utility model, the description of "first", "second" and the like is only for the purpose of description, and cannot be understood as indicating or implying the relative importance of the indicated technical features or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first", "second" can be explicitly or implicitly included at least one of the features. In addition, the meaning of "and / or" appearing throughout the text includes three parallel schemes. For example, "A and / or B" includes A scheme, or B scheme, or A and B scheme. In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the realization of ordinary skilled in the art, when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, and is not within the protection scope required by the utility model.

[0062] The feeding device of the die cutting machine will be described in detail below through the following embodiments.

[0063] In this embodiment, as shown in Figure 1 and Figure 2 The feeding device of the die cutting machine comprises two supporting frames 1, which are symmetrically arranged.

[0064] The feeding roller assembly 2 and the discharging roller assembly 3 are arranged at two ends of the two supporting frames 1.

[0065] The first knurled roller 4 is rotatably arranged on the supporting frame 1 and is arranged on the side close to the feeding roller assembly 2. The first knurled roller 4 is used to drive the paper to move towards the direction where the discharging roller assembly 3 is located.

[0066] The first driving mechanism 5 is connected with the first knurled roller 4 and is used to drive the first knurled roller 4 to rotate.

[0067] The second knurled roller 6 and the third knurled roller 7 are coaxially and rotatably arranged on the supporting frame 1 and are arranged on the side away from the feeding roller assembly 2 of the first knurled roller 4. The second knurled roller 6 and the third knurled roller 7 are used to drive the paper to move towards the direction where the discharging roller assembly 3 is located.

[0068] The second driving mechanism 8 is connected with the second knurled roller 6 and the third knurled roller 7 and is used to drive the second knurled roller 6 or the second knurled roller 6 and the third knurled roller 7 to rotate.

[0069] The synchronous driving mechanism 9 is arranged corresponding to the second knurled roller 6 and is arranged on the side away from the first knurled roller 4 of the second knurled roller 6 and is used to drive the paper to move.

[0070] The supporting roller group 10 is arranged on the lower side of the first knurled roller 4, the second knurled roller 6, the third knurled roller 7 and the synchronous driving mechanism 9 and is used to support the paper.

[0071] In the technical solution, the support frame 1 is two steel plates symmetrical in front and back, the feeding roller assembly 2 is arranged on the right side, used for connecting the device or equipment for printing paper in the paper processing step before feeding, and the discharging roller assembly 3 is arranged on the left side of the support frame 1, used for connecting the device or equipment for paper die cutting in the subsequent processing step. The feeding roller assembly 2 and the discharging roller assembly 3 are connected with the servo motor through a belt wheel to form a 1:3 speed reduction ratio, and 0-50 m / min stepless speed regulation is realized. The first driving mechanism 5 is a motor-driven belt wheel or gear, which can realize 0-50 m / min stepless speed regulation of the first knurled roller 4. The linear speed of the first knurled roller 4 is equal to the linear speed of the feeding roller assembly 2, and the linear speed of the discharging roller assembly 3 is slightly greater than the linear speed of the first knurled roller 4.

[0072] The knurled roller is a roller column with patterns on the surface, which can grip the paper through the surface patterns. The first knurled roller 4 is adjustably arranged on the support frame 1 on the front and back sides, and the first driving mechanism 5 is arranged on the front side of the front support and connected with one end of the first knurled roller 4.

[0073] For convenience of description, the third knurled roller 7 is directly set as two in the subsequent description, and it should be understood that the third knurled roller 7 is also set as one. The second knurled roller 6 is arranged on the left side of the first knurled roller 4 corresponding to the middle position of the first knurled roller 4, and the support rod is arranged in the middle of the support to support the second knurled roller 6. The two third knurled rollers 7 are symmetrically arranged on the two sides of the second knurled roller 6, and the two ends of the third knurled roller 7 are supported by the support frame 1 and the aforementioned support rod. The second knurled roller 6 and the third knurled roller 7 are coaxially connected through the electromagnetic clutch 803, and the second driving mechanism 8 is connected with the second knurled roller 6 through a belt wheel or a gear.

[0074] The synchronous driving mechanism 9 is located on the left side of the second knurled roller 6 and the third knurled roller 7 and is horizontally arranged in the left-right direction. The synchronous driving mechanism 9 is symmetrically arranged as two or more in front and back to apply at least two forces to the paper on the support roller group 10, so as to facilitate the stable operation of the paper. Specifically, the synchronous driving mechanism 9 includes two belt wheels symmetrically arranged in the left-right direction, a synchronous belt 901 is wound on the belt wheels, and a plurality of tooth plates 902 are uniformly fixed on the synchronous belt 901 of the two synchronous driving mechanisms 9. When the tooth plate 902 moves to the lower side of the synchronous belt 901, it is in contact with the paper to generate a certain pressure, and then drives the paper to move to the left.

[0075] The support roller group 10 is a rolling support platform formed by a plurality of uniform arrayed non-powered rollers, which is convenient for conveying the paper and is fixed between the two support frames 1 symmetrically in front and back.

[0076] In some technical solutions, the 5-15° inclination angle formed by the height difference between the feeding end and the discharging end center can make the paper naturally flatten under the action of gravity, and eliminate the initial feeding wrinkles.

[0077] In the embodiment, further comprising:

[0078] The upper cover plate 11 is arranged on the upper side of the first knurling roller 4, the second knurling roller 6, the third knurling roller 7 and the synchronous driving mechanism 9.

[0079] The lower cover plate 12 is arranged on the lower side of the support roller group 10 and is spaced apart from the upper cover plate 11.

[0080] The negative pressure mechanism 13 is arranged on the upper cover plate 11 and communicates with the space between the upper cover plate 11 and the lower cover plate 12.

[0081] The two support frames 1 are provided with air vents at positions corresponding to the spacing of the upper cover plate 11 and the lower cover plate 12.

[0082] In the technical solution, the upper cover plate 11 is a 1.5 mm stainless steel bending piece, the lower cover plate 12 is a punched aluminum plate with a hole diameter of φ2 mm and an opening rate of 35%, and the negative pressure mechanism 13 is configured with three centrifugal fans, each with a power of 1.8-2.2 KW. The upper cover plate 11 is provided with air vents corresponding to the shape of the negative pressure mechanism 13. The negative pressure fan is arranged, and air vents are arranged on the side wall of the support frame 1. The paper can be pressed on the support roller group 10 by the negative pressure mechanism 13 during conveying, thereby ensuring the stability of paper conveying. The negative pressure mechanism 13 is arranged as three, which can determine whether to start the negative pressure mechanism 13 on both sides according to the width of the processed paper, facilitate energy saving, and also facilitate the processing of paper with a larger width.

[0083] In the embodiment, the third knurling roller 7 is symmetrically arranged as two with respect to the second knurling roller 6, and the negative pressure mechanism 13 is arranged as three corresponding to the second knurling roller 6 and the two third knurling rollers 7.

[0084] In the technical solution, the two third knurling rollers 7 are symmetrically distributed on both sides of the second knurling roller 6, the roller body surface is provided with a spiral groove with a lead of 120 mm and a groove depth of 1.5 mm, and the axial spacing between the second knurling roller 6 and the third knurling roller 7 is 50 mm. The suction area corresponding to the lower side cover plate space of the second knurling roller 6 and the suction area corresponding to the two third knurling rollers 7 are distributed in a ratio of 1:0.8:0.8, the suction force corresponding to the second knurling roller 6 is 800 Pa, and the suction force corresponding to the two third knurling rollers 7 is 650 Pa. This design enables effective suction of the edges of wide paper (such as paper with a width of ≥1000 mm), avoids "arch-shaped" deformation caused by excessive central tension, and reduces the actual transverse offset by 42% compared to a single negative pressure cavity structure. When conveying narrower paper, only the middle negative pressure mechanism 13 is started, when conveying wider paper, the front and rear negative pressure mechanisms 13 are started or all three negative pressure mechanisms 13 are started.

[0085] In the embodiment, further comprising:

[0086] Two separators 14 are symmetrically arranged on the lower side of the upper cover plate 11 and correspond to the connection of the second knurling roller 6 and the third knurling roller 7, and are used to adjust the air flow direction between the upper cover plate 11 and the lower cover plate 12.

[0087] In the technical solution, the separator 14 is a polytetrafluoroethylene flow guide plate with a height of 40 mm and a thickness of 10 mm. The distance between the bottom of the separator 14 and the synchronous driving mechanism 9 is controlled to be 2-3 mm, and the separator 14 is installed with an inclination of 10-20° to the front and rear sides, so as to guide the air flow in the central negative pressure cavity to the areas corresponding to the third knurling rollers 7 on both sides. This structure reduces the turbulence intensity in the area of the second knurling roller 6 from 28% to 12%, and improves the paper sticking stability by 37%.

[0088] In the embodiment, it also includes:

[0089] Two adjusting members 15, the synchronous driving mechanism 9 includes two symmetric synchronous belts 901, and the two synchronous belts 901 are respectively arranged at the connection positions of the third knurling rollers 7 and the second knurling rollers 6 on both sides. The two adjusting members 15 are symmetrically arranged on the two support frames 1, and the two adjusting members 15 correspond to the two synchronous belts 901 respectively.

[0090] In the technical solution, the adjusting member 15 has a similar function to the separator 14. The hollow part between the two pulleys of the synchronous driving mechanism 9 is provided with the adjusting member 15, which is slidably arranged on the support frame 1 and extends to the pulley of the synchronous driving mechanism 9 on the inner side, so as to improve the air tightness of the pulley.

[0091] In the embodiment, a plurality of toothed plates 902 are uniformly arranged on the two synchronous belts 901, and the toothed plate 902 is used to abut against the paper and drive the paper to move in the direction of the discharge roller assembly 3.

[0092] In the technical solution, the toothed plate 902 is in a C shape, a Z shape, an L shape, etc., and is fixed on the synchronous belts 901 of the two synchronous driving mechanisms 9. The contact pressure value of the toothed plate 902 and the paper is 0.2-0.5 MPa. In some technical solutions, the surface roughness of the side surface of the toothed plate 902 close to the paper is Ra0.8.

[0093] In the embodiment, the support roller group 10 includes:

[0094] The first unpowered roller group 1001 corresponds to the second knurling roller 6;

[0095] The second unpowered roller group 1002 corresponds to the third knurling roller 7;

[0096] The second unpowered roller set 1002 comprises a plurality of first driven rollers 1003 and a plurality of second driven rollers 1004, each first driven roller 1003 and each second driven roller 1004 are coaxially arranged one by one.

[0097] In the technical solution, the chrome-plated steel roller of the first unpowered roller set 1001 has a surface roughness controlled at Ra0.2. The second unpowered roller set 1002 is a combination of a nylon roller and a rubber roller. The rubber roller is provided with an axial V-shaped groove with a groove width of 2 mm and a pitch of 10 mm, which can increase the friction and store lubricating grease, so that the sliding coefficient of the paper is reduced from 0.25 to 0.18.

[0098] That is, the first driven roller 1003 and the second driven roller 1004 are coaxially arranged and freely rotatable on the support rod between the support frames 1, which is convenient for adapting to paper of different widths, and the coaxiality error of the first driven roller 1003 and the second driven roller 1004 is ≤0.02 mm. The first driven roller 1003 and the second driven roller 1004 each comprise a nylon roller and a rubber roller, and the nylon rollers and the rubber rollers on the first driven roller 1003 and the second driven roller 1004 are arranged alternately.

[0099] In the embodiment, the second driving mechanism 8 comprises:

[0100] A driving motor 801 is arranged on the upper side of the second knurled roller 6;

[0101] A connecting assembly 802 is connected with the driving motor 801 and the second knurled roller 6 respectively;

[0102] A clutch 803 is arranged between the second knurled roller 6 and the third knurled roller 7;

[0103] A controller (not shown in the figure) is electrically connected with the clutch 803 and used for controlling the opening and closing of the clutch 803.

[0104] In the technical solution, the connecting assembly 802 is a chain wheel set or a belt wheel set, and the clutch 803 is an electromagnetic clutch 803. The electromagnetic clutch 803 is selected to have a dry single-piece structure, can complete power connection within 0.1 s when powered on, and the separation gap in the power-off state is 0.5 mm. The PLC controller (not shown in the figure) is preset with a double-mode control logic: when the paper grammage is detected to be <200 g / m², the clutch 803 is separated to make the third knurled roller 7 freely rotate; when the paper grammage is ≥200 g / m², the two rollers are linked, the driving current is automatically adjusted according to the tension feedback, and the energy consumption is reduced by 33% compared with the traditional full-time driving mode.

[0105] Having described above several embodiments of the disclosure, any modifications and variations that fall within the scope of the described embodiments are also intended to be within the scope of the disclosure. As will be apparent to those skilled in the art, some modifications and variations to the embodiments described above can be practiced while staying within the scope and spirit of the described embodiments. The foregoing description of the described embodiments has been presented for the purposes of illustration and description. It is not intended to be exhaustive or to limit the described embodiments to the precise form disclosed. Many modifications and variations are possible in light of the above teachings. It is intended that the disclosed embodiments be limited only by the claims.

Claims

1. A feed device for a die cutting machine, characterized in that The utility model relates to a paper sheet drying device, including: Two support frames (1) are symmetrically arranged; Feed roller assembly (2) and discharge roller assembly (3) are arranged at both ends of two support frames (1); First knurled roller (4) is rotatably arranged on the support frame (1), and is arranged on the side close to the feed roller assembly (2), and the first knurled roller (4) is used to drive the paper to move to the direction where the discharge roller assembly (3) is located; First drive mechanism (5) is connected with the first knurled roller (4), and is used to drive the first knurled roller (4) to rotate; Second knurled roller (6) and third knurled roller (7) are coaxially and rotatably arranged on the support frame (1), and are arranged on the side away from the feed roller assembly (2) of the first knurled roller (4), and the second knurled roller (6) and the third knurled roller (7) are used to drive the paper to move to the direction where the discharge roller assembly (3) is located; Second drive mechanism (8) is connected with the second knurled roller (6) and the third knurled roller (7), and is used to drive the second knurled roller (6) or the second knurled roller (6) and the third knurled roller (7) to rotate; Synchronous drive mechanism (9) is arranged corresponding to the second knurled roller (6), and is arranged on the side away from the first knurled roller (4) of the second knurled roller (6), and is used to drive the paper to move; Support roller group (10) is arranged on the lower side of the first knurled roller (4), the second knurled roller (6), the third knurled roller (7) and the synchronous drive mechanism (9), and is used to support the paper.

2. The feed device of a die-cutting machine according to claim 1, characterized in that, Further including: Upper cover plate (11) is arranged on the upper side of the first knurled roller (4), the second knurled roller (6), the third knurled roller (7) and the synchronous drive mechanism (9); Lower cover plate (12) is arranged on the lower side of the support roller group (10), and a space is left between the upper cover plate (11) and the lower cover plate (12); Negative pressure mechanism (13) is arranged on the upper cover plate (11) and communicates with the space between the upper cover plate (11) and the lower cover plate (12); Two support frames (1) are provided with air vents at positions corresponding to the spacing of the upper cover plate (11) and the lower cover plate (12).

3. The feed device of a die-cutting machine according to claim 2, characterized in that, The third knurled roller (7) is symmetrically arranged with the second knurled roller (6) as two, and the negative pressure mechanism (13) is arranged with three corresponding the second knurled roller (6) and the two third knurled rollers (7).

4. The feed of a die-cutting machine according to claim 3, characterized in that, Further including: Two partition pieces (14) are symmetrically arranged on the lower side of the upper cover plate (11), and are arranged corresponding to the connection of the second knurled roller (6) and the third knurled roller (7), and the partition piece (14) is used to adjust the airflow direction between the upper cover plate (11) and the lower cover plate (12).

5. The feed of a die-cutting machine according to claim 4, characterized in that, Further including: Two adjusting pieces (15), the synchronous driving mechanism (9) includes two symmetrical synchronous belts (901), two synchronous belts (901) are respectively arranged at the connecting places of the third knurled roller (7) and the second knurled roller (6) on two sides, two adjusting pieces (15) are symmetrically arranged on two support frames (1), and two adjusting pieces (15) are respectively arranged corresponding to two synchronous belts (901).

6. The feed mechanism of a die cutting machine according to claim 5, characterized in that, A plurality of toothed plates (902) are also included, and the plurality of toothed plates (902) are uniformly arranged on the two synchronous belts (901), and the toothed plates (902) are used to abut against the paper and drive the paper to move in the direction of the discharge roller assembly (3).

7. The feed mechanism of a die cutting machine according to claim 1, characterized in that, The support roller group (10) includes: A first unpowered roller group (1001) corresponding to the second knurled roller (6); A second unpowered roller group (1002) corresponding to the third knurled roller (7); The second unpowered roller group (1002) includes a plurality of first driven rollers (1003) and a plurality of second driven rollers (1004), and each first driven roller (1003) and each second driven roller (1004) are coaxially arranged one by one.

8. The feed mechanism of a die cutting machine according to claim 1, characterized in that, The second driving mechanism (8) includes: A driving motor (801) arranged on the upper side of the second knurled roller (6); A connecting assembly (802) connected with the driving motor (801) and the second knurled roller (6) respectively; A clutch (803) arranged between the second knurled roller (6) and the third knurled roller (7); A controller electrically connected with the clutch (803) and used to control the opening and closing of the clutch (803).

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