A die-cutting device with a stepped bottom roller

Abstract

The present invention discloses a die-cutting device with a stepped bottom roller, which belongs to the field of die-cutting technology and includes a frame, a magnetic knife roller, a bottom roller, a bottom roller axial adjustment device and a clamping device. The frame includes two support plates and a crossbeam connected between the two support plates; both ends of the magnetic knife roller are rotatably connected to sliding blocks, which are slidably connected to the support plates, and magnetic roller steps are respectively arranged on both sides of the axial direction of the magnetic knife roller; both ends of the bottom roller are rotatably connected to the two support plates, the bottom roller and the support plates are axially movable, and a group of bottom roller steps with gradient diameter changes are respectively arranged on both sides of the axial direction of the bottom roller, and the diameters and diameter change rules of the multiple bottom roller steps in each group of the bottom roller steps are the same; the bottom roller axial adjustment device is installed on the support plate to drive the bottom roller to move axially; the clamping device is installed on the crossbeam to clamp the magnetic knife roller. The present invention is reasonably designed, and the gap between the bottom roller and the magnetic knife roller can be quickly adjusted through simple operation.

Description

Technical Field

[0001] The invention relates to the technical field of die cutting, in particular to a die cutting device with a stepped bottom roller, so as to achieve adjustable gap between a magnetic roller and a bottom roller. Background Art

[0002] At present, the rotary die-cutting unit in the rotary printing and packaging machinery industry is mainly suitable for the production of large quantities of long orders, such as label production, because of its extremely high production efficiency and large investment in consumables.

[0003] However, when the thickness of the labels to be produced changes, it is necessary to replace the plate blades with other thickness specifications, so it is necessary to adjust the gap between the magnetic knife roller and the bottom roller. However, in the rotary die-cutting units used on the market, the installation positions and corresponding relationships of the roller pillows of the magnetic knife roller and the bottom roller are fixed and cannot be adjusted or the adjustment steps are cumbersome, resulting in reduced production efficiency and the need to invest more production and use costs. Summary of the invention

[0004] In view of the problem that the gap between the magnetic knife roller and the bottom roller in the die-cutting device in the prior art is difficult to adjust, the purpose of the present invention is to provide a die-cutting device with a stepped bottom roller.

[0005] To achieve the above object, the technical solution of the present invention is:

[0006] A die-cutting device with a stepped bottom roller, comprising:

[0007] A frame, the frame comprising two parallel and opposite support plates and a crossbeam connected between the two support plates;

[0008] A magnetic knife roller, both ends of which are rotatably connected to sliding blocks, the sliding blocks are slidably connected to the support plate, and magnetic roller steps are respectively provided on both sides of the axial direction of the magnetic knife roller;

[0009] A bottom roller, wherein both ends of the bottom roller are rotatably connected to the two support plates, the bottom roller and the support plates are axially movable, and a group of bottom roller steps with gradient diameter changes are respectively arranged on both sides of the axial direction of the bottom roller, and the diameter changes of the bottom roller steps of each group have the same rule;

[0010] A bottom roller axial adjustment device, the bottom roller axial adjustment device comprises a bracket, an adjustment screw and a connector, the bracket is fixedly mounted on the support plate, the adjustment screw is threadedly connected to the bracket, the connection block is placed in a groove on the end surface of the bottom roller, a cover plate is installed at the notch of the groove, and one end of the adjustment screw passes through a through hole on the cover plate and is fixedly connected to the connection block; and

[0011] A clamping device, the clamping device includes a frame, a clamping screw and a clamping guide wheel, the frame is fixedly mounted on the crossbeam, the clamping screw is threadedly connected to the frame, the clamping guide wheel is mounted on the output end of the clamping screw, and the clamping guide wheel abuts against the circumferential side wall of the sliding block and / or the magnetic knife roller to respectively press the two magnetic roller steps on the magnetic knife roller onto the two bottom roller steps of the same size on the bottom roller.

[0012] Furthermore, the clamping device also includes a pressurized oil cylinder, which is fixedly mounted on the frame. The pressurized oil cylinder includes a cylinder body, a piston and a piston rod. The clamping screw is threadedly connected to the cylinder body and the output end of the clamping screw abuts against the piston. The clamping guide wheel is mounted on the output end of the piston rod.

[0013] Preferably, the clamping device includes two clamping guide wheels, and the two clamping guide wheels are symmetrically arranged to abut against the circumferential side wall of the magnetic knife roller from both sides of the magnetic knife roller in the radial direction.

[0014] Preferably, there are two clamping devices, and the two clamping devices are symmetrically arranged on both sides of the axial direction of the magnetic knife roller.

[0015] Preferably, a limiting step is provided in the groove to limit the axial position of the connector.

[0016] Preferably, the connector is a bearing.

[0017] Preferably, the support plates are each provided with a shaft sleeve matched with the shaft neck of the bottom roller.

[0018] Furthermore, it also includes a transmission mechanism, which includes a bottom roller gear installed on the bottom roller and a magnetic roller gear installed on the magnetic knife roller, and the bottom roller gear is meshed with the magnetic roller gear.

[0019] Furthermore, it also includes a sprocket and a transmission gear, wherein the sprocket is rotatably connected to the support plate, the transmission gear is fixedly and coaxially installed on the sprocket, and the transmission gear is meshed with the bottom roller gear.

[0020] Preferably, each group of bottom roller steps includes three bottom roller steps with different diameters.

[0021] By adopting the above technical scheme, since a group of bottom roller steps with multiple different diameters are arranged on both sides of the bottom roller, the bottom roller steps with different diameters on the bottom roller can be used in conjunction with the magnetic roller steps on the magnetic knife roller under the drive of the bottom roller axial adjustment device, thereby adjusting different gaps to facilitate the installation of printing plate blades with different thicknesses; in addition, by using the clamping device, after the gap between the magnetic knife roller and the bottom roller is adjusted, the clamping device can be used to maintain the stability of the gap. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a structural schematic diagram of the present invention;

[0023] Figure 2 for Figure 1 A partial enlarged view of the middle A;

[0024] Figure 3 for Figure 1 A partial enlarged view of point B in the middle.

[0025] In the figure: 1-frame, 11-support plate, 12-crossbeam, 13-sleeve, 2-magnetic knife roller, 21-magnetic roller bearing, 22-sliding block, 23-magnetic roller step, 3-bottom roller, 31-bottom roller step A, 32-bottom roller step B, 33-bottom roller step C, 34-groove, 35-cover plate, 4-bottom roller axial adjustment device, 41-bracket, 42-adjusting screw, 43-connecting body, 5-pressing device, 51-frame, 52-pressing screw, 53-pressurizing cylinder, 54-pressing guide wheel, 6-bottom roller gear, 7-magnetic roller gear, 8-sprocket, 9-transmission gear, 10-handwheel, 20-locking handwheel. DETAILED DESCRIPTION

[0026] The specific embodiments of the present invention are further described below in conjunction with the accompanying drawings. It should be noted that the description of these embodiments is used to help understand the present invention, but does not constitute a limitation of the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0027] It should be noted that, in the description of the present invention, the directions or positional relationships indicated by the terms "up", "down", "left", "right", "front", "back", etc. are descriptions of the structure of the present invention based on the accompanying drawings, and are only for the convenience of describing the present invention, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0028] The "first" and "second" in this technical solution are only used to distinguish the names of the same or similar structures, or corresponding structures with similar functions, and are not an arrangement of the importance of these structures, nor do they have a ranking, comparison of size, or other meanings.

[0029] In addition, unless otherwise clearly specified and limited, the terms "installation" and "connection" should be understood in a broad sense. For example, the connection can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be a connection between the two structures. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood based on the overall idea of ​​the present invention and the specific context of the present solution.

[0030] A die-cutting device with a stepped bottom roller, such as Figure 1 As shown, it includes a frame 1, a magnetic knife roller 2, a bottom roller 3, a bottom roller axial adjustment device 4 and a clamping device 5.

[0031] The frame 1 includes two parallel and opposite support plates 11 and a plurality of cross beams 12 connected between the two support plates 11 . For example, cross beams 12 are connected to both sides of the support plate 11 .

[0032] Both ends of the magnetic knife roller 2 are equipped with magnetic roller bearings 21, and the magnetic roller bearings 21 are respectively installed on the sliding blocks 22. At the same time, the sliding blocks 22 are slidably connected to the support plate 11 along the direction perpendicular to the axis of the magnetic knife roller 2. A plurality of circumferentially uniformly distributed magnetic strips are installed on the roller body of the magnetic knife roller 2 to facilitate the adsorption of the printing plate blade. At the same time, magnetic roller steps 23 are respectively arranged on both sides of the roller body of the magnetic knife roller 2 in the axial direction.

[0033] The two ends of the bottom roller 3 are rotatably connected to the two support plates 11 respectively. For example, an axial hole is set on the support plate 11, and a shaft sleeve 13 is installed in the axial hole. The shaft necks at both ends of the bottom roller 3 are passed through the shaft sleeves 13, and in this embodiment, a clearance fit is set between the shaft sleeves 13 and the shaft necks so that the bottom roller 3 can move axially on the support plate 11. A group of multiple bottom roller steps with gradient diameter changes are respectively arranged on both sides of the bottom roller 3 in the axial direction, and the diameter change rules of the multiple bottom roller steps on both sides are the same. For example, in this embodiment, each group of bottom roller steps is provided to include three bottom roller steps with different diameters, namely, bottom roller step A31, bottom roller step B32 and bottom roller step C33, and the diameters of the three increase successively from left to right, so that the two magnetic roller steps 23 on the magnetic knife roller 2 can have three matching positions with the bottom roller 3, that is, when the two magnetic roller steps 23 on the magnetic knife roller 2 match with the two bottom roller steps A31 on the bottom roller 3 (the two are against each other), there is a first gap between the magnetic knife roller 2 and the bottom roller 3, when the two magnetic roller steps 23 on the magnetic knife roller 2 match with the two bottom roller steps B32 on the bottom roller 3 (the two are against each other), there is a second gap between the magnetic knife roller 2 and the bottom roller 3, and when the two magnetic roller steps 23 on the magnetic knife roller 2 match with the two bottom roller steps C33 on the bottom roller 3 (the two are against each other), there is a third gap between the magnetic knife roller 2 and the bottom roller 3. Furthermore, it is understandable that the number of bottom roller steps included in each group of bottom roller steps may also be other values, such as two, four or five.

[0034] The bottom roller axial adjustment device 4 is fixedly mounted on one of the support plates 11 (the support plate 11 on the right side). The bottom roller axial adjustment device 4 is used to drive the bottom roller 3 to move axially, so that the bottom roller steps of different diameters on the bottom roller 3 are matched with the magnetic roller steps 23 on the magnetic knife roller 2 to facilitate the adjustment of different gaps.

[0035] In this embodiment, Figure 2As shown, the bottom roller axial adjustment device 4 includes a bracket 41, an adjustment screw 42 and a connector 43. The bracket 41 is n-shaped or u-shaped, and one end of its opening is fixedly connected to the outer wall of the support plate 11; the adjustment screw 42 is threadedly connected to the bracket 41, the adjustment screw 42 is parallel to the bottom roller 3, and one end (output end, or left end) of the adjustment screw 42 is aimed at the right end face of the bottom roller 3; a groove 34 is provided on the right end face of the bottom roller 3, and the connector 43 is placed in the groove 34, and the notch of the groove 34 is installed with a cover plate 35 by screws, and one end (i.e., the output end) of the above-mentioned adjustment screw 42 passes through the through hole on the cover plate 35 and is fixedly connected to the connection block 34. In order to prevent the connection block 44 from axially moving in the groove 34, resulting in unstable axial position of the bottom roller 3, a limiting step is provided on the inner side wall of the groove 34 to limit the axial position of the connector 43 in the groove 34. The connector 43 is a bearing, whose inner ring is fixedly mounted on the output end of the adjusting screw 42 and whose outer ring is fixedly mounted on the limiting step of the groove 44, so as to reduce the friction between the connector 43 and the groove 34 through the setting of the bearing.

[0036] The clamping device 5 is installed on the crossbeam 12. The clamping device 5 is used to press the magnetic roller step 23 of the magnetic knife roller 2 against the bottom roller step on the bottom roller 3 after adjusting the gap between the bottom roller 3 and the magnetic knife roller 2, so as to maintain the gap effectively and stably. In addition, a scale plate is provided on the bracket 41, so as to understand the position of the bottom roller 3 when the bottom roller 3 is adjusted axially.

[0037] In this embodiment, Figure 3 As shown, the clamping device 5 includes a frame 51, a clamping screw 52 and a clamping guide wheel 54. The frame 51 is a metal plate, which is fixedly mounted on the crossbeam 12 by bolts; the clamping screw 52 is threadedly connected to the frame 51, and the clamping screw 52 is perpendicular to the magnetic knife roller 2, and its output end points to the circumferential side wall of the magnetic knife roller 2 or to the sliding block 22; and the clamping guide wheel 54 is installed on the output end of the clamping screw 52, ​​so that the circumferential outer wall of the clamping guide wheel 52 abuts against the circumferential side wall of the magnetic knife roller 2 and / or the sliding block 22, so as to respectively clamp the two magnetic roller steps 23 on the magnetic knife roller 2 against the two bottom roller steps of the same size on the bottom roller 3.

[0038] In this embodiment, both the adjusting screw 42 and the clamping screw 52 are connected with a handwheel 10 for easy operation. At the same time, a locking nut with a locking handwheel 20 is also installed on the adjusting screw 42. When the locking handwheel 20 is screwed and pressed against the bracket 41, the position of the adjusting screw 42 can be fixed.

[0039] In one embodiment, the clamping device 5 further includes a pressurizing oil cylinder 53, which is fixedly mounted on the frame 51 and includes a cylinder body, a piston and a piston rod. At this time, the clamping screw 52 is threadedly connected to the cylinder body, and the output end of the clamping screw 52 abuts against the piston to facilitate the movement of the piston, and the above-mentioned clamping guide wheel 54 is installed on the output end of the piston rod to facilitate the clamping of the magnetic knife roller 2 under the push of the piston rod.

[0040] In one embodiment, a clamping device 5 is provided, and two clamping devices 5 are arranged symmetrically to respectively clamp the magnetic knife roller 2 from both axial sides (ie, the left side and the right side) to prevent deflection.

[0041] In one embodiment, the clamping device 5 includes two of the above-mentioned clamping guide wheels 54, and the two clamping guide wheels 54 are symmetrically arranged on a guide wheel bracket, and the guide wheel bracket is fixed on the clamping screw 52 or the piston rod in the above-mentioned embodiment, and the two clamping guide wheels 54 abut against the circumferential side walls of the magnetic knife roller 2 from both radial sides of the magnetic knife roller 2.

[0042] In one embodiment, a transmission mechanism is further included, which includes a bottom roller gear 6 installed on the bottom roller 3 and a magnetic roller gear 7 installed on the magnetic knife roller 2, and the bottom roller gear 6 is meshed with the magnetic roller gear 7, wherein the bottom roller gear 6 and the magnetic roller gear 7 are respectively installed on the left side of the bottom roller 3 and the magnetic knife roller 2. When in use, only one of the bottom roller 3 and the magnetic knife roller 2 needs to be driven, and the other can rotate synchronously, thereby cutting out qualified products.

[0043] In one embodiment, it also includes a sprocket 8 and a transmission gear 9, wherein the sprocket 8 is rotatably mounted on a short shaft via a bearing, and the short shaft is fixedly connected to a support plate 11 located on the left side via screws, and the transmission gear 9 is also rotatably connected to the short shaft via a bearing, and the transmission gear 9 is also fixedly connected to the sprocket 8 via screws, and the transmission gear 9 is meshed with the bottom roller gear 6.

[0044] During use, the prime mover drives the sprocket 8 to rotate through the chain, the sprocket 8 drives the transmission gear 9 to rotate, the transmission gear 9 drives the bottom roller gear 6 to rotate, and the bottom roller gear 6 drives the magnetic roller gear 7 to rotate, so that the bottom roller 3 and the magnetic knife roller 2 rotate synchronously, so that the blade adsorbed on the magnetic knife roller 2 performs die-cutting operations on the labels between the bottom roller 3 and the magnetic knife roller 2; when it is necessary to replace blades of different thickness specifications, first loosen the clamping device 5, then loosen the locking hand wheel 20, and the bottom roller 3 can be driven to move axially by adjusting the hand wheel 10, so that the other adapted bottom roller step moves to a position relative to the magnetic roller step 23, thereby matching a gap suitable for use, and then tighten the locking hand wheel 20 and the locking clamping device 5.

[0045] The embodiments of the present invention are described in detail above with reference to the accompanying drawings, but the present invention is not limited to the described embodiments. For those skilled in the art, various changes, modifications, substitutions and variations of these embodiments are made without departing from the principles and spirit of the present invention, and still fall within the scope of protection of the present invention.

Claims

1. A die-cutting device with a stepped bottom roller, characterized in that: include, A frame, the frame comprising two parallel and opposite support plates and a crossbeam connected between the two support plates; A magnetic knife roller, both ends of which are rotatably connected to sliding blocks, the sliding blocks are slidably connected to the support plate, and magnetic roller steps are respectively provided on both sides of the axial direction of the magnetic knife roller; A bottom roller, wherein both ends of the bottom roller are rotatably connected to the two support plates, the bottom roller and the support plates are axially movable, and a group of bottom roller steps with gradient diameter changes are respectively arranged on both sides of the axial direction of the bottom roller, and the diameter changes of the bottom roller steps of each group have the same rule; A bottom roller axial adjustment device, the bottom roller axial adjustment device comprises a bracket, an adjustment screw and a connector, the bracket is fixedly mounted on the support plate, the adjustment screw is threadedly connected to the bracket, the connector is placed in a groove on the end surface of the bottom roller, a cover plate is installed at the notch of the groove, and one end of the adjustment screw passes through a through hole on the cover plate and is fixedly connected to the connector; and A clamping device, the clamping device comprising a frame, a clamping screw and a clamping guide wheel, the frame being fixedly mounted on the crossbeam, the clamping screw being threadedly connected to the frame, the clamping guide wheel being mounted on the output end of the clamping screw, and the clamping guide wheel being in contact with the sliding block and / or the circumferential side wall of the magnetic knife roller to respectively clamp the two magnetic roller steps on the magnetic knife roller onto the two bottom roller steps of the same diameter on the bottom roller; Both the adjusting screw and the pressing screw are connected with hand wheels.

2. The die-cutting device with a stepped bottom roller according to claim 1, characterized in that: The clamping device also includes a pressurized oil cylinder, which is fixedly mounted on the frame. The pressurized oil cylinder includes a cylinder body, a piston and a piston rod. The clamping screw is threadedly connected to the cylinder body and the output end of the clamping screw abuts against the piston. The clamping guide wheel is mounted on the output end of the piston rod.

3. The die-cutting device with a stepped bottom roller according to claim 1 or 2, characterized in that: The clamping device includes two clamping guide wheels, which are symmetrically arranged to abut against the circumferential side wall of the magnetic knife roller from both sides of the magnetic knife roller in the radial direction.

4. The die-cutting device with a stepped bottom roller according to claim 3, characterized in that: There are two clamping devices, and the two clamping devices are symmetrically arranged on both sides of the axial direction of the magnetic knife roller.

5. The die-cutting device with a stepped bottom roller according to claim 1, characterized in that: A limiting step is arranged in the groove to limit the axial position of the connecting body.

6. The die-cutting device with a stepped bottom roller according to claim 5, characterized in that: The connecting body is a bearing.

7. The die-cutting device with a stepped bottom roller according to claim 1, characterized in that: The support plates are each provided with a shaft sleeve matched with the shaft neck of the bottom roller.

8. The die-cutting device with a stepped bottom roller according to claim 1, characterized in that: It also includes a transmission mechanism, which includes a bottom roller gear installed on the bottom roller and a magnetic roller gear installed on the magnetic knife roller, and the bottom roller gear is meshed with the magnetic roller gear.

9. The die-cutting device with a stepped bottom roller according to claim 8, characterized in that: It also includes a sprocket and a transmission gear, wherein the sprocket is rotatably connected to the support plate, the transmission gear is fixedly and coaxially installed on the sprocket, and the transmission gear is meshed with the bottom roller gear.

10. The die-cutting device with a stepped bottom roller according to claim 1, characterized in that: Each group of bottom roller steps includes three bottom roller steps with different diameters.

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