An adjustable pitch die cutting structure

Abstract

The utility model relates to paperboard die -cutting device technical field, specifically disclose a spacing adjustable die -cutting structure, including die -cutting roller, die -cutting mechanism, axial translation mechanism and spacing adjustment mechanism, through setting up by the first motor drive spacing adjustment mechanism, realized each die -cutting mechanism along the die -cutting roller axial position electrically adjustable, operating personnel can through control motor operation, accurate drive transmission system, and then drive die -cutting mechanism to move to the preset station, this electrically adjustable mode replaced traditional manual adjustment, significantly improved the adjustment efficiency and accuracy, make equipment can quickly adapt to the die -cutting demand of different specifications paperboard, effectively satisfied the flexible and automation requirement of modernization production.

Description

Technical Field

[0001] This utility model relates to the technical field of cardboard die-cutting devices, and in particular to a die-cutting structure with adjustable spacing. Background Technology

[0002] Die-cutting machines, also known as cutting machines, are key post-processing equipment in the cardboard packaging and printing industry. Their core function is to apply pressure to the printed material through an impression plate and use a preset die to press out specific shapes of scratches or cuts on the cardboard, thereby separating the finished product from the waste material and completing processing steps such as die-cutting and creasing.

[0003] In the prior art, in order to meet the processing requirements of cardboard of different sizes, the cutting blade assembly on the die-cutting roller needs to be able to adjust its axial position. For example, a cardboard cutting device disclosed in Chinese Patent Publication No. CN223301769U includes a mounting frame disposed at one end of a conveyor frame, a rotating shaft disposed on the mounting frame, a slitting assembly disposed on the rotating shaft, a protrusion disposed on the outer edge of the rotating shaft along its axial direction, a plurality of connecting holes evenly spaced along its length direction on the protrusion, the slitting assembly including a plurality of spaced mounting sleeves and a slitting blade disposed on the mounting sleeves, a groove for sliding engagement with the protrusions being formed on the inner circular surface of the mounting sleeve along its axial direction, and a through hole disposed on the top wall of the groove along the radial direction of the mounting sleeve, the mounting sleeve being fixed to the rotating shaft by a locking member passing through the connecting hole and the through hole.

[0004] However, the adjustment of the above-mentioned slitting components requires manual adjustment, specifically by loosening and tightening the locking parts to loosen and fix the mounting sleeve. This manual adjustment method has low precision and low efficiency.

[0005] Therefore, the above problems urgently need to be solved. Utility Model Content

[0006] In view of the shortcomings of the prior art, the purpose of this utility model is to provide a die-cutting structure with adjustable spacing to solve the above problems.

[0007] An adjustable-spacing die-cutting structure, comprising: Die-cutting rollers; The die-cutting mechanism includes a blade holder sleeved on the die-cutting roller and slidable along its axial direction, and a cutting blade mounted on the blade holder; The axial translation mechanism includes mounting seats located on both radially sides below the die-cutting roller, a slide rail fixed to the mounting seats and extending along the axial direction of the die-cutting roller, and multiple sliders that slide in cooperation with the slide rail. Both mounting seats are provided with helical toothed racks extending along the axial direction of the die-cutting roller. The spacing adjustment mechanism, corresponding in number to the sliders on the same slide rail, includes a lower push plate fixed to the slider, bearing seats fixed to both sides of the lower end of the lower push plate, a helical gear shaft rotatably disposed between the two bearing seats, a first helical tooth and a second helical tooth fixed to both ends of the helical gear shaft, a motor seat disposed on one of the bearing seats, a first motor mounted on the motor seat, and a third helical tooth connected to the output shaft of the first motor and meshing with the first helical tooth. The first helical tooth and the second helical tooth respectively mesh with the two helical gear racks.

[0008] Specifically, the upper end of the push plate is provided with a lever on both sides, and the tool holder is provided with an annular limiting groove for engaging the lever.

[0009] Specifically, the bearing housing is provided with a first bearing, and the helical gear shaft passes through the inner rings of the two first bearings.

[0010] Specifically, an L-shaped mounting plate is fixed to the lower end of the motor base, and a cable chain is connected to the L-shaped mounting plate. The other end of the cable chain is fixed to the mounting base.

[0011] Specifically, the helical gear shaft is composed of two sections connected by a coupling.

[0012] Specifically, it also includes an initial phase adjustment mechanism, which includes a second motor, a drive gear mounted on the output shaft of the second motor, and a driven gear connected to one end of the die-cutting roller and meshing with the drive gear.

[0013] Specifically, at least one of the cutting blades is a grooving tool, which includes a first grooving blade and a second grooving blade spaced apart. The first grooving blade is fixed to the blade holder, and the second grooving blade is slidably disposed on the blade holder to adjust the distance between the first grooving blade and the second grooving blade.

[0014] Specifically, at least one of the cutters is a corner cutting tool, which includes a first corner cutting tool and a second corner cutting tool spaced apart. The first corner cutting tool is fixed to the tool holder, and the second corner cutting tool is slidably disposed on the tool holder to adjust the distance between the first corner cutting tool and the second corner cutting tool.

[0015] Specifically, at least one of the cutting tools is a trimming tool, which includes an annular trimming blade fixed to the tool holder.

[0016] The beneficial effects of this utility model are: 1. The adjustable spacing die-cutting structure of this application realizes the electric adjustment of the position of each die-cutting mechanism along the axial direction of the die-cutting roller by setting a spacing adjustment mechanism driven by a first motor; the operator can control the operation of the motor to precisely drive the transmission system, thereby moving the die-cutting mechanism to the preset station; this electric adjustment method replaces the traditional manual adjustment, significantly improving the adjustment efficiency and accuracy, enabling the equipment to quickly adapt to the die-cutting needs of different specifications of paperboard, and effectively meeting the flexibility and automation requirements of modern production; 2. The spacing adjustment mechanism adopts a helical gear meshing and double-sided symmetrical layout design. The helical gear transmission itself has the advantages of smooth transmission, high load-bearing capacity and reliable self-locking, which can effectively prevent the die-cutting mechanism from deviating during high-speed operation. At the same time, the double-sided synchronous meshing structure formed by the helical teeth at both ends of the helical gear shaft and the helical gear racks on both sides greatly enhances the rigidity and stability of the transmission system, effectively suppresses off-center load and vibration, and ensures extremely high accuracy and reliability of the axial position adjustment of the die-cutting mechanism during long-term operation. Attached Figure Description

[0017] Figure 1 This is a perspective view of the adjustable-spacing die-cut structure of this application; Figure 2 A perspective view of the adjustable-spacing die-cut structure of this application, omitting the mounting base; Figure 3 This is a cross-sectional view of the adjustable-spacing die-cut structure of this application; Figure 4 This is a perspective view of the spacing adjustment mechanism of this application; Figure 5 This is a perspective view of the grooving tool of this application; Figure 6 This is a perspective view of the corner-cutting tool of this application; Figure 7 This is a perspective view of the trimming tool of this application; Figure 8 This is a schematic diagram of the cardboard structure.

[0018] The attached figures are labeled as follows: die-cutting roller 10, die-cutting mechanism 20, knife holder 21, cutter 22, axial translation mechanism 30, mounting base 31, slide rail 32, slider 33, helical rack 34, spacing adjustment mechanism 40, push plate 41, bearing seat 42, helical gear shaft 43, first helical gear 44, second helical gear 45, motor base 46, first motor 47, third helical gear 48, paddle block 49, annular limiting groove 211, first bearing 410, L-shaped mounting plate 411, drag chain 412, coupling 413, initial phase adjustment mechanism 50, second motor 51, drive gear 52, driven gear 53, first grooving knife 221, second grooving knife 222, first corner cutting knife 223, second corner cutting knife 224, annular trimming blade 225, cardboard 90. Detailed Implementation

[0019] This utility model provides a die-cutting structure with adjustable spacing. To make the purpose, technical solution, and effects of this utility model clearer and more explicit, the following describes this utility model in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this utility model and are not intended to limit this utility model.

[0020] In the description of this invention, it should be understood that the orientation descriptions, such as up, down, front, back, left, right, etc., are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention.

[0021] Please refer to Figures 1 to 8 This embodiment discloses an adjustable spacing die-cutting structure that can be used for die-cutting paperboard 90. The die-cutting structure includes a die-cutting roller 10, a die-cutting mechanism 20, an axial translation mechanism 30, and a spacing adjustment mechanism 40. By setting the axial translation mechanism 30 and the spacing adjustment mechanism 40, the position of each die-cutting mechanism 20 along the axial direction of the die-cutting roller 10 can be adjusted, which can adapt to the die-cutting requirements of paperboard 90 of different specifications.

[0022] Please refer to Figure 1 , Figure 5 , Figure 6 and Figure 7 The die-cutting mechanism 20 includes a knife holder 21 sleeved on the die-cutting roller 10 and slidable along its axial direction, and cutters 22 mounted on the knife holder 21. In this embodiment, three cutters 22 are grooving cutters, each including a first grooving cutter 221 and a second grooving cutter 222 spaced apart; one cutter 22 is a corner cutting cutter, including a first corner cutting cutter 223 and a second corner cutting cutter 224 spaced apart; and one cutter 22 is an edge trimming cutter, including an annular edge trimming blade 225 fixed on the knife holder 21. When the cardboard 90 is conveyed above the die-cutting roller 10, the rotating die-cutting roller 10 simultaneously drives the three grooving cutters, one corner cutting cutter, and one edge trimming cutter to rotate, realizing the grooving, corner cutting, and edge trimming of the cardboard 40. The grooving line, corner cutting line, and edge trimming line can be referenced as follows: Figure 8 The dotted lines in the cardboard 40 shown.

[0023] Furthermore, as shown in the figure, the axial translation mechanism 30 includes mounting seats 31 located on both radial sides below the die-cutting roller 10, slide rails 32 fixed to the mounting seats 31 and extending axially along the die-cutting roller 10, and multiple sliders 33 that slide in cooperation with the slide rails 32. Both mounting seats 31 are provided with helical toothed racks 34 extending axially along the die-cutting roller 10. By setting two slide rails 32, two sliders 33 are respectively set on both sides of the lower push plate 41. The two sliders 33 slide along the two slide rails 32 respectively, thereby improving the smoothness of the sliding of the lower push plate 41.

[0024] Please refer to Figure 1 and Figure 2 As shown, the number of spacing adjustment mechanisms 40 corresponds to the number of sliders 33 on the same slide rail 32. Each spacing adjustment mechanism 40 includes a lower push plate 41 fixed to the slider 33, bearing seats 42 fixed to both sides of the lower end of the lower push plate 41, a helical gear shaft 43 rotatably disposed between the two bearing seats 42, a first helical tooth 44 and a second helical tooth 45 fixed to both ends of the helical gear shaft 43, a motor seat 46 disposed on one of the bearing seats 42, a first motor 47 mounted on the motor seat 46, and a third helical tooth 48 connected to the output shaft of the first motor 47 and meshing with the first helical tooth 44. The first helical tooth 44 and the second helical tooth 45 respectively mesh with two helical gear racks 34. When it is necessary to adjust the axial position of a certain die-cutting mechanism 20 along the die-cutting roller 10, the corresponding first motor 47 can be started to drive the third helical tooth 48 to rotate; the third helical tooth 48 drives the first helical tooth 44 meshing with it to rotate, thereby transmitting power through the helical gear shaft 43 to make the second helical tooth 45 rotate synchronously. Under the coordinated action of the first helical tooth 44 and the second helical tooth 45, the entire spacing adjustment mechanism 40 moves smoothly along the helical tooth racks 34 on both sides, thereby realizing the axial position adjustment of the die-cutting mechanism 20. The helical tooth meshing structure has a self-locking function, which can effectively prevent the die-cutting mechanism 20 from axially shifting during operation and ensure positioning stability.

[0025] In this application, the helical gear shaft 43 is provided with a first helical tooth 44 and a second helical tooth 45 at both ends, which mesh synchronously with the helical gear racks 34 on both sides, forming a double-sided symmetrical transmission layout. Simultaneously, by adding a third helical tooth 48 as the transmission link between the first motor 47 and the first helical tooth 44, the first motor 47 is fixedly installed, avoiding vibration and stability problems that may be caused by motor servoing. This double-sided synchronous meshing structure significantly enhances the transmission rigidity and operational stability of the system, effectively suppresses off-center load and vibration, and ensures high precision and high reliability of the axial adjustment of the die-cutting mechanism 20.

[0026] Please refer to Figure 2The upper end of the push plate 41 is provided with two levers 49 on both sides, and the cutter holder 21 is provided with an annular limiting groove 211 for engaging the levers 49. When the push plate 41 moves axially, the levers 49 drive the cutter holder 21 to move axially. The annular limiting groove 211 allows the cutter holder 21 to rotate, avoiding interference. When the push plate 41 moves axially, the levers 49 drive the cutter holder 21 to move axially synchronously. The annular limiting groove 211 allows the levers 49 to have rotational freedom within the groove, thus allowing the cutter holder 21 to rotate appropriately in the circumferential direction, avoiding motion interference with the die-cutting roller 10 or other adjacent components.

[0027] Please refer to Figure 3 and Figure 4 The bearing housing 42 is provided with a first bearing 410, and the helical gear shaft 43 passes through the inner rings of the two first bearings 410. The first bearings 410 provide stable rotational support for the helical gear shaft 43, ensuring that the helical gear shaft 43 maintains smooth rotation during transmission, which can reduce the frictional loss of the helical gear shaft 43 and improve the smoothness and service life of the transmission.

[0028] Please refer to Figure 3 and Figure 4 An L-shaped mounting plate 411 is fixed to the lower end of the motor base 46. A drag chain 412 is connected to the L-shaped mounting plate 411, and the other end of the drag chain 412 is fixed to the mounting base 31. When the spacing adjustment mechanism 40 moves along the slide rail 32, the drag chain 412 extends and retracts accordingly. The drag chain 412 is also used to accommodate and protect the power line and signal line of the first motor 47, which can prevent the lines from getting tangled, worn or pulled during movement, thus improving the safety and reliability of the equipment. The helical gear shaft 43 is composed of two sections connected by a coupling 413. The coupling 413 allows for minor installation errors or deformation compensation between the two sections of the helical gear shaft 43, reducing the requirements for machining and assembly accuracy, improving the reliability of transmission, and facilitating disassembly and maintenance.

[0029] Please refer to Figure 1 The die-cutting structure also includes an initial phase adjustment mechanism 50, which includes a second motor 51, a drive gear 52 mounted on the output shaft of the second motor 51, and a driven gear 53 connected to one end of the die-cutting roller 10 and meshing with the drive gear 52. Before die-cutting, the initial position of the die-cutting mechanism 20 on the die-cutting roller 20 needs to be adjusted using the initial phase adjustment mechanism 50 to align with the die-cutting position of the cardboard 170 and improve die-cutting accuracy. The specific adjustment process is as follows: the second motor 51 transmits power to the driven gear 53 through the drive gear 52, and the driven gear 53 ultimately drives the die-cutting roller 10 to rotate, which in turn drives the die-cutting mechanism 20 to rotate and adjust its initial die-cutting angle.

[0030] Please refer to Figure 1 and Figure 5The first grooving cutter 221 is fixed to the cutter holder 21, and the second grooving cutter 222 is slidably mounted on the cutter holder 21 to adjust the distance between the first grooving cutter 221 and the second grooving cutter 222. The second grooving cutter 222 can be adjusted and locked by means of a limiting groove, a limiting block, and a screw; alternatively, it can be automatically adjusted by a motor driving a splined shaft, which drives an adjusting gear that meshes with an arc-shaped rack installed at the bottom of the second grooving cutter 222. This allows the position of the second grooving cutter 222 to be adjusted, enabling the equipment to adapt to grooving requirements of different widths and improving the processing adaptability of the equipment.

[0031] Please refer to Figure 1 and Figure 6 The first corner-cutting blade 223 is fixed to the blade holder 21, and the second corner-cutting blade 224 is slidably mounted on the blade holder 21 to adjust the distance between the first corner-cutting blade 223 and the second corner-cutting blade 224. The second corner-cutting blade 224 can be adjusted and locked by the cooperation of a limiting groove, a limiting block, and a screw; alternatively, it can be automatically adjusted by a motor driving a splined shaft, which drives an adjusting gear that meshes with an arc-shaped rack installed at the bottom of the second corner-cutting blade 224. This allows the position of the second corner-cutting blade 224 to be adjusted, enabling the equipment to adapt to different corner-cutting width requirements and meet diverse carton forming requirements.

[0032] The preferred embodiments of this utility model have been described in detail above. However, this invention is not limited to the embodiments described. Those skilled in the art can make various equivalent modifications or substitutions without departing from the spirit of this invention. All such equivalent modifications or substitutions are included within the scope defined by the claims of this invention.

Claims

1. A die-cutting structure with adjustable spacing, characterized in that, include: Die-cutting roller (10); The die-cutting mechanism (20) includes a blade holder (21) sleeved on the die-cutting roller (10) and slidable along its axial direction, and a cutter (22) mounted on the blade holder (21). The axial translation mechanism (30) includes mounting seats (31) located on both radial sides below the die-cutting roller (10), a slide rail (32) fixed to the mounting seats (31) and extending axially along the die-cutting roller (10), and a plurality of sliders (33) slidably engaged with the slide rail (32). Both mounting seats (31) are provided with helical toothed racks (34) extending axially along the die-cutting roller (10). The spacing adjustment mechanism (40) corresponds to the number of sliders (33) on the same slide rail (32), including a push plate (41) fixed on the slider (33), bearing seats (42) fixed on both sides of the lower end of the push plate (41), a helical gear shaft (43) rotatably disposed between the two bearing seats (42), a first helical tooth (44) and a second helical tooth (45) fixed at both ends of the helical gear shaft (43), a motor seat (46) disposed on one of the bearing seats (42), a first motor (47) mounted on the motor seat (46), and a third helical tooth (48) connected to the output shaft of the first motor (47) and meshing with the first helical tooth (44). The first helical tooth (44) and the second helical tooth (45) respectively mesh with the two helical gear racks (34).

2. The adjustable-spacing die-cutting structure according to claim 1, characterized in that, The upper end of the push plate (41) is provided with a lever (49) on both sides, and the knife holder (21) is provided with an annular limiting groove (211) for engaging the lever (49).

3. The adjustable-spacing die-cutting structure according to claim 1, characterized in that, The bearing housing (42) is provided with a first bearing (410), and the helical gear shaft (43) passes through the inner rings of the two first bearings (410).

4. The adjustable-spacing die-cutting structure according to claim 1, characterized in that, The lower end of the motor base (46) is fixed with an L-shaped mounting plate (411), and the L-shaped mounting plate (411) is connected with a drag chain (412). The other end of the drag chain (412) is fixed to the mounting base (31).

5. The adjustable-spacing die-cutting structure according to claim 1, characterized in that, The helical gear shaft (43) is composed of two sections connected by a coupling (413).

6. The adjustable-spacing die-cutting structure according to claim 1, characterized in that, It also includes an initial phase adjustment mechanism (50), which includes a second motor (51), a drive gear (52) disposed on the output shaft of the second motor (51), and a driven gear (53) connected to one end of the die-cutting roller (10) and meshing with the drive gear (52).

7. The adjustable-spacing die-cutting structure according to claim 1, characterized in that, At least one of the cutting blades (22) is a grooving tool, which includes a first grooving blade (221) and a second grooving blade (222) spaced apart. The first grooving blade (221) is fixed to the blade holder (21), and the second grooving blade (222) is slidably disposed on the blade holder (21) to adjust the distance between the first grooving blade (221) and the second grooving blade (222).

8. The adjustable-spacing die-cutting structure according to claim 1, characterized in that, At least one of the cutters (22) is a corner cutting tool, which includes a first corner cutting tool (223) and a second corner cutting tool (224) spaced apart. The first corner cutting tool (223) is fixed to the tool holder (21), and the second corner cutting tool (224) is slidably disposed on the tool holder (21) to adjust the distance between the first corner cutting tool (223) and the second corner cutting tool (224).

9. The adjustable-spacing die-cutting structure according to claim 1, characterized in that, At least one of the cutters (22) is a trimming tool, which includes an annular trimming blade (225) fixed to the tool holder (21).

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