CN110126022B

CN110126022B - Novel mechanical transmission type high-precision die cutting equipment

Info

Publication number: CN110126022B
Application number: CN201910480551.5A
Authority: CN
Inventors: 宋伟; 杨宗前; 蒋崇贞; 韩丙辉
Original assignee: Beijing Leigh Mardon Pacific Packaging Co ltd
Current assignee: Beijing Leigh Mardon Pacific Packaging Co ltd
Priority date: 2019-06-04
Filing date: 2019-06-04
Publication date: 2021-01-19
Anticipated expiration: 2039-06-04
Also published as: CN110126022A

Abstract

The invention discloses a novel mechanical transmission type high-precision die cutting device, which comprises: the paper cutting machine comprises a driving motor (1), a main transmission mechanism (2), a paper conveying system (3), a die cutting action mechanism (4), a die cutting plate (5) and a waste cleaning device (6), wherein the driving motor (1) is driven by a power supply and is used for generating rotary driving force; the output shaft of the driving motor (1) is in transmission connection with the main transmission mechanism (2); the paper conveying system (3) is arranged on one side of the die cutting action mechanism (4) and used for conveying a target paperboard to a position between the die cutting action mechanism (4), the die cutting action mechanism (4) comprises an upper platform and a lower platform, the die cutting plate is arranged on the lower surface of the upper platform and faces the lower platform, and a die cutting base plate is arranged on the lower platform; and the waste cleaning device (6) is arranged on the other side of the die cutting action mechanism (4) and is used for receiving the die-cut paperboard and cleaning waste.

Description

Novel mechanical transmission type high-precision die cutting equipment

Technical Field

The invention relates to the field of machinery, in particular to improved mechanical transmission type high-precision die cutting equipment.

Background

The die cutting machine is a surface finishing processing device for forming and processing various packaging and decorating materials such as printing paperboards and the like, and is a main device for printing and cutting forming. Today, with rapid development of economy and continuous improvement of living standard of materials, people have higher and higher requirements on the quality of printed matters, and the traditional concept that only the internal quality is considered and the appearance is ignored can weaken the market competitiveness of printing enterprises to some extent. Die cutting indentation is taken as an important post-press processing process, and is more and more emphasized by printing and packaging enterprises because the die cutting indentation can improve the artistic effect of a printed matter and the value of the printed matter.

The die cutting and impressing process is a process of installing a template formed by arranging steel knives and steel wires on a die cutting machine according to product requirements, applying certain pressure through an impressing plate and rolling and cutting a printed product into a required shape. The die cutting and impressing process can be used for processing various exquisite books and periodicals frames, packaging decorations and other printed matters into required shapes, and processing paper box printed matters into paper boxes with novel structures, smoothness and straightness.

The main parts of the die cutting machine are a die cutting platen and a press cutting mechanism, the processed material is positioned between the die cutting platen and the press cutting mechanism, and the finishing treatment technology of die cutting is completed under the action of pressure.

The die cutting machine in China has undergone three stages of independent innovation mainly for producing a vertical flat-pressing flat die cutting machine (tiger mouth), surveying and mapping foreign machine types and digesting and absorbing foreign machine types from the middle of the 80 th generation of the 20 th century. Although each enterprise increases the degree of independent innovation, many enterprises still stay in the mapping and simulation stage from the current situation, the design theory and the design method of the die-cutting machine are generally old, and the perfect scientific theory support is lacked, so that the product designed by the traditional design method has long design period and high cost, and the produced die-cutting machine cannot reach a higher level in the aspects of precision and stability.

Therefore, the self-design of the die cutting equipment with completely independent intellectual property rights has great practical significance.

Disclosure of Invention

In view of the above situation, the present invention provides a novel mechanically driven high precision die cutting apparatus, comprising: a driving motor, a main transmission mechanism, a paper conveying system, a die cutting action mechanism, a die cutting plate and a waste cleaning device,

wherein the driving motor is driven by a power supply for generating a rotational driving force;

an output shaft of the driving motor is in transmission connection with the main transmission mechanism;

the paper conveying system is arranged on one side of the die cutting action mechanism and used for conveying a target paperboard to a position between the die cutting action mechanism, the die cutting action mechanism comprises an upper platform and a lower platform, the die cutting plate is arranged on the lower surface of the upper platform and faces the lower platform, and a die cutting base plate is arranged on the lower platform;

the waste cleaning device is arranged on the other side of the die cutting action mechanism and used for receiving the die-cut paperboard and performing waste cleaning treatment.

In a preferred implementation mode, the waste cleaning device further comprises a paper collecting mechanism, and the paper collecting mechanism is arranged at the downstream of the waste cleaning device.

In another preferred implementation, the driving motor is an electric motor, and the electric motor is fixed on a bracket of the full-automatic platen die-cutting machine.

In another preferred embodiment, the front end of the output shaft of the drive motor and the main transmission mechanism are provided with gears matched with each other, so that the transmission connection is realized.

In another preferred implementation, the main transmission mechanism comprises a gear ring, a four-corner gear, an eccentric wheel shaft and a heave bar.

In another preferred implementation mode, the gear ring support further comprises limiting mechanisms, wherein the limiting mechanisms are located on two sides of the gear ring, and therefore the gear ring is prevented from laterally displacing.

In another preferred implementation, the die-cutting plate has a die-cutting edge corresponding to the die-cutting pattern.

In another preferred embodiment, the annular inner side of the gear ring has a gear, and the output shaft of the drive motor passes through the inner side of the gear ring and is in transmission connection with the gear ring from the inside of the gear ring.

In another preferred implementation mode, the waste cleaning device adopts a pneumatic-mechanical combination mode to clean waste.

The invention also provides a method for die cutting of a paperboard by using the die cutting equipment, which comprises the following steps:

conveying a target plate to a lower platform of the die cutting action mechanism by using a paper conveying system;

driving the main transmission mechanism by using a driving motor so as to drive an upper platform of the die cutting action mechanism to move downwards and die-cut the target plate;

conveying the target plate subjected to die cutting to the upper part of a waste cleaning device, and cleaning waste materials cut by the die cutting;

and collecting paper by using a paper collecting mechanism.

Technical effects

The transmission mechanism of the die cutting equipment adopts a driving mode of simultaneously driving the four corners by a single motor, so that the cost is saved, the action consistency of the die cutting platform is ensured, the levelness of the die cutting platform can be accurately controlled by adjusting the positions of the four corner gears and the four actuating rods, and the die cutting equipment is basically not influenced by the operation process once the debugging is finished.

The waste cleaning mechanism adopts a waste cleaning mode of accurately bearing force in the center and moving in four corners for the exposed hollow area, gives sufficient deformation space for the removed area, removes the waste from the whole material in a non-vertical manner, and basically eliminates the problem of scraping the edge of a thicker material.

Drawings

Fig. 1 is a schematic structural diagram of a die-cutting apparatus in embodiment 1 of the present invention, and the conventional die-cutting apparatus is similar in structure and different in size, and is only used for illustration;

fig. 2 is a schematic top view of a main transmission mechanism 2 of the die cutting apparatus in embodiment 1 of the present invention;

fig. 3 is a front view schematically showing the structure of a main transmission mechanism 2 of the die cutting apparatus in embodiment 1 of the present invention;

fig. 4 is a front view schematically showing the construction of a four-corner gear in the main transmission 2 of the die cutting apparatus in embodiment 1 of the present invention;

FIG. 5 is a schematic view showing the structure of a counter roll in the waste cleaning apparatus in example 2 of the present invention;

fig. 6 is a schematic structural diagram of redundant die-cutting edges added at positions corresponding to the hollowed-out regions in the die-cutting edge in embodiment 2 of the present invention, and of course, the shapes of the hollowed-out regions are often irregular, and for irregular shapes, two longest diagonal directions of the hollowed-out regions are first determined, and a substantially rectangular shape is formed by using four vertexes (or positions close to the vertexes) of the longest diagonal directions as vertexes, and in the substantially rectangular shape, the die-cutting edges of the shapes in the drawing are added.

Fig. 7 shows a partial enlarged view of the counter roller in example 2.

Detailed Description

The present invention will be described in further detail with reference to examples and drawings, but the present invention is not limited thereto.

Example 1

As shown in fig. 1, the full-automatic flat-pressing flat-die cutting machine in this embodiment includes a driving motor 1, a main transmission mechanism 2, a paper feeding system 3, a die cutting action mechanism 4, a die cutting plate 5, a waste cleaning device 6, and a paper collecting mechanism 7.

The drive motor 1 is driven by an external power source to generate a rotational drive force. The output shaft of the driving motor 1 is in power connection with the main transmission mechanism 2, for example, the front end of the output shaft of the driving motor 1 and the main transmission mechanism 2 are both provided with gears, so that power transmission is realized.

The die cutting action mechanism 4 comprises an upper die cutting platform and a lower die cutting platform. The paper feeding system 3 may be implemented using conventional paper feeding equipment, i.e. front, side and/or rear guides arranged around the lower platform to enable the target sheets to be fed to the desired position, and these configurations are well known in the art and will not be described in detail here.

The die cutting plate 5 is installed on the lower surface of the upper die cutting platform, is fixedly connected with the upper die cutting platform and can move along with the up-and-down reciprocating motion of the upper die cutting platform. The main transmission mechanism 2 drives the upper die cutting platform to reciprocate up and down. When die cutting is carried out, the absolute parallelism of the upper surface and the lower surface of a die cutting platform is important, and the existing die cutting equipment has various modes of driving the upper die cutting platform and the lower die cutting platform to move, and adopts gear transmission and hydraulic cylinder transmission. However, these methods are either complicated in structure and high in cost, or are prone to increase in error with use.

In order to solve such a problem, the present embodiment proposes a novel driving method based on a gear transmission structure.

Specifically, as shown in fig. 2-4, the main transmission 2 includes a gear ring 2-1, four corner gears 2-3, four eccentric axles 2-4, and four longitudinal heave bars 2-5. The gear ring 2-1 is provided with an outer ring gear 2-6 and an inner ring gear 2-7, the outer ring gear annularly surrounds the periphery of the gear ring, the inner ring gear is positioned on the inner side of the gear ring, and an output shaft of the driving motor 1 directly or indirectly penetrates through the ring of the inner ring gear to be meshed with the inner ring gear. The dimensions of the various gears and axles may be adjusted as desired, with the intermediate gear being exaggerated for clarity.

As shown in fig. 2, if the output shaft of the driving motor 1 indirectly passes through the inner ring gear, it means that the output shaft 1-1 of the driving motor 1 is engaged with and drivingly connected to another rotary driving shaft 1-2, the rotary driving shaft 1-2 extends through the inner ring of the gear ring 2-1, the front end and the rear end of the rotary driving shaft 1-2 are fixed by first and second bearings 2-11, 2-12 and first and second bearing seats 2-13, 2-14, respectively, so as to be rotatable within the gear ring 2-1 by the motor, the rotary driving shaft 1-2 has an output gear 2-8 between the first and second bearings, the output gear 2-8 and the inner ring gear 2-7 are matched with each other and engaged with each other, the rotary driving shaft 1-2 is located below the gear ring 2-1, and engages the inner ring gear 2-7 at the lower portion.

If the output shaft directly penetrates through the inner ring gear, the output shaft of the driving motor extends through the inner ring gear of the gear ring gear 2-1, the front end and the rear end of the output shaft are respectively fixed through a first bearing and a second bearing and a first bearing seat and a second bearing seat so as to be capable of rotating in the gear ring gear 2-1 under the driving of the motor, the output shaft 1-1 of the driving motor 1 is provided with an output gear 2-8 between the first bearing and the second bearing, the output gear 2-8 and the inner ring gear 2-7 are matched and meshed with each other, and the output shaft 1-1 of the driving motor is positioned at the lower part of the gear ring gear 2-1 and meshed with the inner ring gear 2-7 at the lower.

In order to reduce the transmission error, a second direct transmission mode can be adopted, and of course, in order to facilitate the maintenance, a first transmission mode can be adopted. Or preferably a detachable joint is provided between the output shaft of the drive motor 1 and the drive motor for subsequent maintenance.

The gear ring 2-1 has a width such that four outward output force points can be formed.

As shown in fig. 2, two of the four corner gears 2-3 are mounted at the lower left corner of the gear ring 2-1, two are mounted at the lower right corner of the gear ring 2-1, the two corner gears 2-3 mounted at the lower left corner are coaxial with each other, and the two corner gears 2-3 mounted at the lower right corner are coaxial with each other. Each of the four corner gears is circular, and the outer ring has an outer gear with a rotation shaft located in the middle of the circular gear and an eccentrically disposed four corner drive shaft. The external gears of the four-corner gears match with the external gears of the gear ring 2-1 and are meshed with each other. The two corner gears mounted on the lower left corner are engaged with different positions on the left side of the gear ring coaxially with each other (two positions in the front and rear in the figure, which are the left and right sides of the gear ring when viewed from the left side), and the two corner gears mounted on the lower right corner are engaged with different positions on the right side of the gear ring coaxially with each other (two positions in the front and rear in the figure, which are the left and right sides of the gear ring when viewed from the right side). Preferably, the internal and external teeth of the gear ring correspond one-to-one, or 1-n, i.e. the internal and external teeth have a fixed ratio, to make the rotational drive smoother.

Thus, the four-corner gears 2-3 are divided into two groups, each group of two gears respectively form support for the gear rings from the left lower part and the right lower part of the gear rings, the middle rotary driving shaft 1-2 forms a third fixed point for the gear rings from the inner parts of the gear rings, and the three points of the gear rings are fixed. Of course, in order to maintain the position of the gear ring stable, the gear ring can be clamped by a clamping roller, the clamping roller can be a fork-shaped support frame with two forks, each fork is provided with a roller, and the rollers towards the rollers on the two forks of the gear ring realize clamping-type fixing of the gear ring from two sides.

Each of the four corner gears 2-3 has a bearing fixed to the frame of the upper die-cutting table by a bearing, the bearing positions of the four corner gears are located on the same horizontal plane, and the four corner gears are identical to each other in size, material and configuration. The driving shafts (i.e., the eccentric axles 2 to 4) are eccentrically provided at both sides of each of the four corner gears, and as shown in fig. 4, the two sides of a driving shaft are connected with a double-fork driving rod, the upper end of the double-fork driving rod is connected with the two sides of the driving shaft of the four-corner gear, the inner shaft of the driving shaft is fixed on the side wall of the four-corner gear, the outer shaft of the driving shaft is fixed with the double-fork driving rod, the inner shaft of the driving shaft can rotate relative to the outer sleeve, the lower end of the double-fork driving rod is fixedly arranged at the upper end of a longitudinal fluctuation rod through a universal shaft, the longitudinal fluctuation rod comprises an outer sleeve and an inner layer driving rod, the inner layer driving rod extends out of the upper end and the lower end of the outer sleeve, the upper end of the inner layer driving rod is connected with the double-fork driving rod.

The outer sleeve of the longitudinal fluctuation rod is fixed on the bracket to keep vertical and immovable, and the movement direction of the inner layer driving rod is limited.

The structure of the invention adopts a pure mechanical mode to realize synchronous motion, has low cost and good synchronous effect, simultaneously stresses four corners of the die-cutting machine, and avoids the problem of unbalanced driving force caused by adopting a single thick shaft at the middle part for driving. The unidirectional rotation of a single driving shaft can simultaneously drive four-corner gears to synchronously rotate, the cost is low, and a high-precision control system is not required. And in order to ensure the uniformity and the non-pause property of the stress of the four corners, the proportion of the tooth number of the inner gear in the gear ring, the tooth number of the outer gear, the tooth number of the four-corner gear and the tooth number of the gear shaft is set as follows: 4N: 6N: 3N: 1N, N being an integer multiple of 6, i.e. N = 6N.

By adopting the proportion, the driving force of the driving shaft can be effectively amplified, the gears can be ensured to run more smoothly, the radian of each gear rotating one tooth just to be the integral multiple of 15/n, each rotation circle can return to the fixed point, the gear rotation and the rotation potential difference of the top and the bottom of the driving rod can not be caused, the error is reduced, and the unnecessary gear stress is reduced.

In addition, by adopting the driving mode of the invention, the motor driving shaft is driven to rotate in the inner ring of the driving ring, the lever effect can be realized, the driving force can be adjusted by adjusting the size of the gear disc on the motor driving shaft, and if the large driving force is needed, the size of the gear disc on the motor driving shaft is reduced. In another implementation mode, a plurality of gear discs are coaxially nested on the motor driving shaft, each gear disc is installed at a different position of the driving shaft, and the center distance between any two adjacent gear discs is larger than or equal to the width of the gear ring.

The waste cleaning device 6 is arranged at the downstream of the die cutting platform, after the paper conveying system 3 waits for the completion of die cutting, the waste cleaning device 6 is used for cleaning the paper board after die cutting or other cut boards towards the downstream, and the waste cleaning device 6 can adopt various modes, for example, the waste cleaning device comprises a fan arranged above, a mesh arranged below and a waste recycling box, and the fan is used for blowing the cut parts in the paper board with strong force, so that the cut parts fall off and pass through the mesh to enter the waste recycling box.

Example 2

The existing waste cleaning device has the biggest defect that due to the fact that roller jacking or high wind force direct blowing is adopted, in the waste cleaning process, due to the fact that die cutting edges are cut tidily in the paperboard die cutting process, the edges of medium and thick paperboards with high hardness are relatively sharp, when waste is cleaned, cut-off portions are outwards separated along the direction perpendicular to a paper surface under the action of pressure, scraping can be formed on the edges of reserved portions of the paperboards, the edges of target products in the paperboards are often scraped, edge burrs or layering can occur, and product quality is affected. The edge scraping has little influence on products needing to be sealed at the edge inside subsequently, but has adverse influence on customer experience for hollow products or other products needing to be exposed at the edge.

In view of the above problem, the applicant of the present embodiment proposes a waste disposal device, which is tested to effectively reduce the problem of edge scraping during the waste disposal process.

Specifically, in the present embodiment, in order to reduce the edge scraping phenomenon during the waste cleaning process, an improvement is first made in the design of the die cutting plate. Firstly, on the basis of a normal design of a die cutting plate, redundant die cutting edges are added in the range of a die cutting blade corresponding to the area in the die cutting plate for the cut area or the cut area of an important part in any paperboard, the redundant die cutting edges are provided with a first part and a second part, the first part is a quadrangle or a pentagon, a gap is formed between two adjacent sides of the quadrangle or the pentagon, the second part is a plurality of radial edges, the radial edges extend outwards from the side edges of the quadrangle or the pentagon in a radiation mode, and every two radial edges form a certain included angle with each other.

As shown in fig. 6, which is a schematic structural diagram of redundant die cutting edges added at positions corresponding to the hollowed-out areas in the die cutting edge in embodiment 2, certainly, the shapes of the hollowed-out areas are often irregular, and for irregular shapes, the longest two diagonal directions of the hollowed-out areas are determined first, and a substantially rectangular or rectangular shape is formed by using four vertexes or positions close to the vertexes of the longest diagonal directions as vertexes (or positions close to the vertexes, mainly to form a regular shape). The adjacent sides of the quadrilateral have a gap therebetween (which is reserved to be large enough to avoid snapping) that subtends a diagonal position (i.e., a relatively long region in the cut-away portion), and a plurality of radial edges that extend radially outward from the sides of the quadrilateral, the radial edges pointing toward the short sides in the cut-away region.

When waste is cleaned, the waste cleaning device 6 comprises a transmission plate, a pair of large-diameter rollers, a fan, a mesh and a waste recycling box. The circumference of the large-diameter roller is equal to or slightly greater than the length of the paper boards, the roller just presses one paper board per revolution (or a part of blank rotating area is reserved in consideration of a transmission gap between adjacent paper boards, namely, the length of the roller per revolution is equal to the length of the paper boards plus the length of the paper board gap), the upper roller is provided with a protrusion matched with the shape of the first part of the redundant die-cutting knife edge at the corresponding position, the lower roller is provided with a recess at the corresponding position of the cut-off area, the size of the recess corresponds to the cut-off area, the planar size of the recess is greater than that of the protrusion, and the depth of the recess is matched with that of the protrusion. If there are multiple cut-out regions, there are multiple pairs of protrusions and depressions.

When the waste cleaning device works, firstly, in the die cutting process, redundant die cutting is carried out on the integral elimination area in the paperboard, so that the area needing integral elimination is die-cut into the non-integral paperboard, and an area which is provided with a central part and four corner parts and is connected with the central part in the diagonal direction is formed. And transferring the die-cut paper boards to a waste removing device through a conveying platform, pressing the central part of the area to be removed by utilizing a pair of large-diameter rollers distributed up and down while conveying the paper boards, and drawing the four corners through the residual connecting parts between the central part and the four corners, so that the part to be removed is basically separated from the rest parts of the paper boards after being output from the roller parts, and along with the rolling of the rollers, most of the area to be removed is carried by the lower roller and rotates downwards to fall into a waste recycling box below the rollers.

The cut-off portion is caused to fall off through the mesh and into the used paper recovery box.

While the principles of the invention have been described in detail in connection with the preferred embodiments thereof, it will be understood by those skilled in the art that the foregoing embodiments are merely illustrative of exemplary implementations of the invention and are not limiting of the scope of the invention. The details of the embodiments are not to be interpreted as limiting the scope of the invention, and any obvious changes, such as equivalent alterations, simple substitutions and the like, based on the technical solution of the invention, can be interpreted without departing from the spirit and scope of the invention.

Claims

1. The utility model provides a novel mechanical transmission formula high accuracy cross cutting equipment which characterized in that includes: the paper cutting machine comprises a driving motor (1), a main transmission mechanism (2), a paper conveying system (3), a die cutting action mechanism (4), a die cutting plate (5) and a waste cleaning device (6), wherein the driving motor (1) is driven by a power supply and is used for generating rotary driving force; the output shaft of the driving motor (1) is in transmission connection with the main transmission mechanism (2); the paper conveying system (3) is arranged on one side of the die cutting action mechanism (4) and used for conveying a target paperboard to a position between the die cutting action mechanism (4), the die cutting action mechanism (4) comprises an upper die cutting platform and a lower die cutting platform, the main transmission mechanism (2) drives the upper die cutting platform to reciprocate up and down, the die cutting plate is arranged on the lower surface of the upper die cutting platform and faces the lower die cutting platform, and a die cutting base plate is arranged on the lower die cutting platform; the waste cleaning device (6) is arranged on the other side of the die cutting action mechanism (4) and used for receiving die-cut paperboards and performing waste cleaning treatment, the main transmission mechanism (2) comprises a gear ring (2-1), four corner gears (2-3), four eccentric wheel shafts (2-4) and four longitudinal fluctuating rods (2-5), the gear ring (2-1) is provided with an outer ring gear (2-6) and an inner ring gear (2-7), the outer ring gear (2-6) is annularly wrapped on the periphery of the gear ring (2-1), the inner ring gear (2-7) is positioned on the inner side of the gear ring (2-1), an output shaft of the driving motor (1) directly or indirectly penetrates through the ring of the inner ring gear and is meshed with the inner ring gear, two of the four corner gears (2-3) are installed on the left lower corner of the gear ring gear, the four-corner die cutting machine is characterized in that the four-corner die cutting machine is coaxial with each other, two eccentric wheel shafts (2-4) are arranged at the lower right corner of the gear ring and are coaxial with each other, each four-corner gear (2-3) is provided with an eccentric wheel shaft (2-4), each eccentric wheel shaft (2-4) drives one longitudinal fluctuation rod (2-5) to move through a double-fork driving rod, each longitudinal fluctuation rod (2-5) comprises an outer sleeve and an inner layer driving rod, the inner layer driving rods extend out of the upper end and the lower end of the outer sleeve, the upper ends of the inner layer driving rods are connected with the double-fork driving rods on the eccentric wheel shafts (2-4) in a pivot mode, the lower ends of the.

2. A new mechanically driven high precision die cutting apparatus according to claim 1, characterized by further comprising a delivery mechanism (7) arranged downstream of the waste cleaning device (6).

3. The novel mechanically driven high precision die cutting apparatus of claim 1 wherein the drive motor is an electric motor secured to a frame of the full automatic platen die cutting machine.

4. The novel mechanically driven high precision die cutting equipment according to claim 1, characterized in that the front end of the output shaft of the driving motor (1) and the main transmission mechanism (2) are provided with gears matched with each other, so as to realize transmission connection.

5. The novel mechanically driven high precision die cutting equipment according to claim 1, further comprising a limiting mechanism, wherein the limiting mechanism is located on two sides of the gear ring to prevent the gear ring from lateral displacement.

6. The novel mechanically actuated high precision die cutting apparatus of claim 1 wherein said die cutting plate has die cutting edges corresponding to a die cutting pattern.

7. The novel mechanically driven high precision die cutting apparatus as claimed in claim 5, wherein said waste removing device is used for removing waste by a pneumatic-mechanical combination method.