CN118752890A - An elliptical printing machine capable of automatically detecting the state of substrate - Google Patents

Abstract

The invention discloses an elliptical printing machine capable of automatically detecting the state of a printing substrate, and relates to an elliptical printing machine in the field, comprising a printing machine body, wherein a plurality of printing mechanisms are installed on the upper end of the printing machine body, and a plurality of groups of printing mechanisms are installed on the upper end of the printing machine body. Compared with the prior art, the structural design of the invention is reasonable and practical, and is convenient for effectively clamping and carrying the printing substrate, and is convenient for the printing substrate to maintain a stable state when moving, and reduces the curling, bulging, deflection or deformation of the printing substrate during printing, effectively reduces the unqualified rate during printing, and improves the use effect. The designed detection component can effectively perform automatic detection on the printing substrate, and the inspection range is large, the detection is accurate, and the detection efficiency is improved, which effectively improves the use effect.

Description

An elliptical printing machine capable of automatically detecting the state of substrate

Technical Field

The invention relates to the technical field of elliptical printing machines, in particular to an elliptical printing machine capable of automatically detecting the state of a printing material.

Background Art

The printing machine is suitable for printing on a variety of materials. After modification, the application range of the printing machine is wider and is no longer limited to paper printing. The oval printing machine is suitable for all kinds of printing materials, glue, water slurry, ink, etc. Compared with manual printing, the oval printing machine saves labor and has more stable printing quality. It can complete multiple colors at one time without affecting production.

In the printing industry, the substrate is first laid on the printing platform of the printing equipment, and then the printing platform or the substrate is moved to the printing device through the driving mechanism for printing. If the substrate has curling, bulging, deflection or deformation, etc., unqualified products may be produced during printing. At present, the laying of substrates in the industry is done manually. The operators have to check the substrates while laying the cloth, which is labor-intensive. In addition, since there are many factors affecting manual identification and the standards cannot be quantified, it is easy to make misjudgments. Therefore, the missed detection rate is high and the consistency is poor, resulting in waste of substrates. For this reason, we provide an elliptical printing machine that can automatically detect the status of substrates to solve this problem.

Summary of the invention

The object of the present invention is to provide an elliptical printing machine capable of automatically detecting the state of a substrate, so as to solve the problems raised in the above-mentioned background technology.

To achieve the above-mentioned object, the present invention provides the following technical solution: an elliptical printing machine capable of automatically detecting the state of a substrate, comprising a printing machine body, a plurality of printing mechanisms being mounted on the upper end of the printing machine body, and a plurality of groups of printing mechanisms being mounted on the upper end of the printing machine body;

The printing mechanism includes a support frame, a hydraulic cylinder, a first connecting member, a support beam, a second connecting member, a connecting rod, a fixed cover, a printing screen and a detection component. A hydraulic cylinder is installed on one side of the support frame, and the hydraulic cylinder is movably connected to the first connecting member through one end of the hydraulic rod. The lower end of the first connecting member is installed with a support beam, and the outer side of the support beam is movably connected to the second connecting member through a pin shaft. The second connecting member is connected to the support frame, and the lower end of the support beam is respectively connected to the fixed cover through two connecting rods. The printing screen is installed between the fixed covers, and the outer sides of the fixed covers are commonly connected to the detection component.

Preferably, the detection component includes a drive shell, a first servo motor, a double-strand pulley, a belt, a single-strand pulley, a screw, a threaded sleeve, a mounting seat, a first monitor and a first auxiliary light. The drive shell is installed on the outside of two fixed covers, the inner cavity of the drive shell is installed with the first servo motor, the output end of the first servo motor is installed with a double-strand pulley, the outer side of the double-strand pulley is sleeved with two belts, the end of the belt away from the double-strand pulley is sleeved with a single-strand pulley, the inner cavity of the single-strand pulley is installed with a screw, one end of the screw passes through the fixed cover and extends to its inner cavity, the inner cavity of the fixed cover is rotatably connected to the screw through a bearing, the outer side of the screw is threaded with a threaded sleeve, a long groove is provided on the corresponding side of the fixed cover, one end of the threaded sleeve is installed with a mounting seat, one side of the mounting seat passes through the long groove and is installed with the first monitor and the first auxiliary light.

Preferably, a sliding block is installed at the lower end of the threaded sleeve, and a sliding groove is provided at the bottom end of the inner cavity of the fixed cover for sliding connection therewith.

Preferably, a second monitor is installed at the middle part of the outer side of the driving shell, and a second auxiliary lamp is symmetrically installed at the outer side of the driving shell.

Preferably, the printing mechanism includes a printing plate, an L-shaped groove, a rectangular groove, a second servo motor, a rotating shaft, a gear, an upper tooth plate, a lower tooth plate, a connecting plate and a clamping assembly. One end of the printing plate is installed in the printing machine body through a mounting frame, and an L-shaped groove is symmetrically arranged on the upper end of the printing plate. Rectangular grooves are symmetrically arranged on both sides of the L-shaped groove. A second servo motor is installed in the inner cavity of the printing plate, and the output end of the second servo motor is connected to the rotating shaft. A gear is installed on the outer side of the rotating shaft, and the upper and lower parts of the gear are respectively meshed with the upper tooth plate and the lower tooth plate, and one side of the upper tooth plate and the lower tooth plate are connected to the clamping assembly through a connecting plate.

Preferably, a bearing seat is installed on one side of the inner cavity of the printing plate, and the bearing seat is rotatably connected to the rotating shaft.

Preferably, the clamping assembly includes a fixed rod, a first L-shaped block, an electric push rod, a second L-shaped block, a moving plate and a pressure block. The fixed rod is connected to the connecting plate. Both sides of the fixed rod pass through the rectangular groove and extend to the outside thereof to connect to the first L-shaped block. The lower end of the first L-shaped block is installed with an electric push rod. The output rod of the electric push rod passes through the first L-shaped block and is connected to the second L-shaped block. The second L-shaped blocks are commonly connected with a moving plate, and the moving plate is located above the L-shaped groove. Pressure blocks are equidistantly installed on the lower end of the moving plate.

Preferably, a threaded groove is installed on the upper end of the moving plate.

Preferably, the pressing block is in a cylindrical state and is made of rubber material.

Compared with the prior art, the present invention has the following beneficial effects:

The present invention places the printing material on the upper end of the printing plate, and then uses multiple pressing blocks at the lower end of the moving plate of the clamping and pressing assembly to press down on the excess area on the substrate, and then drives the rotating shaft and the gear on its outer side to rotate through the output end of the second servo motor, and the gear drives the upper tooth plate and the lower tooth plate meshed with it to move in directions away from each other, and then the upper tooth plate and the lower tooth plate respectively drive the clamping and pressing assembly to move in directions away from each other through the connecting plate, and the moving plate of the clamping and pressing assembly drives the pressing blocks and the excess area on the substrate pressed down by them to move in opposite directions, so that the substrate is in a taut state, effectively avoiding the situation where the substrate is abnormal and the printing effect is reduced, and effectively improving the use effect.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is a schematic diagram of the overall three-dimensional structure of the main body of the present invention;

FIG2 is a schematic diagram of the three-dimensional structure of a printing mechanism of the present invention;

FIG3 is a schematic diagram of a three-dimensional structure of a part of a printing mechanism of the present invention;

FIG4 is a schematic diagram of a semi-sectional three-dimensional structure of a detection assembly of the present invention;

FIG5 is a schematic diagram of a three-dimensional structure of a partial detection assembly of the present invention;

FIG6 is an enlarged structural schematic diagram of the device of part A in FIG5 of the present invention;

FIG7 is a schematic diagram of the three-dimensional structure of the printing mechanism of the present invention;

FIG8 is a schematic diagram of a partial cross-sectional view and a disassembled three-dimensional structure of a printing mechanism of the present invention;

FIG. 9 is a schematic diagram of the three-dimensional disassembly structure of the clamping assembly of the present invention.

In the figure: printing machine body 1, printing mechanism 2, support frame 21, hydraulic cylinder 22, first connecting member 23, support beam 24, second connecting member 25, connecting rod 26, fixing cover 27, printing screen 28, detection assembly 29, driving shell 291, first servo motor 292, double-strand pulley 293, belt 294, single-strand pulley 295, screw rod 296, threaded sleeve 297, mounting seat 298, first monitor 299, first auxiliary lamp 2910, slider 2911, second Monitor 2912, second auxiliary light 2913, long groove 210, slide groove 211, printing mechanism 3, printing plate 31, L-shaped groove 32, rectangular groove 33, second servo motor 34, rotating shaft 35, bearing seat 36, gear 37, upper tooth plate 38, lower tooth plate 39, connecting plate 310, clamping assembly 311, fixing rod 3111, first L-shaped block 3112, electric push rod 3113, second L-shaped block 3114, shift plate 3115, pressure block 3116, threaded groove 3117.

DETAILED DESCRIPTION

The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

Please refer to Figures 1-9. This embodiment provides an elliptical printing machine that can automatically detect the state of a substrate, including a printing machine body 1. A plurality of printing mechanisms 2 are installed on the upper end of the printing machine body 1. The printing mechanisms 2 include a support frame 21, a hydraulic cylinder 22, a first connecting member 23, a supporting beam 24, a second connecting member 25, a connecting rod 26, a fixing cover 27, a printing screen 28 and a detection component 29. A hydraulic cylinder 22 is installed on one side of the support frame 21. The hydraulic cylinder 22 is movably connected to the first connecting member 23 through one end of the hydraulic rod. The lower end of the first connecting member 23 is installed with the supporting beam 24. The outer side of the support beam 24 is movably connected to the second connecting member 25 through a pin shaft, and the second connecting member 25 is connected to the support frame 21. The lower end of the support beam 24 is respectively connected to the fixed cover 27 through two connecting rods 26. The printing screen 28 is installed between the fixed covers 27. The outer sides of the fixed covers 27 are commonly connected to the detection assembly 29. The detection assembly 29 includes a drive shell 291, a first servo motor 292, a double-strand pulley 293, a belt 294, a single-strand pulley 295, a screw 296, a threaded sleeve 297, a mounting seat 298, a first monitor 299 and a first auxiliary The lamp 2910, the driving shell 291 is installed on the outside of the two fixed covers 27, the inner cavity of the driving shell 291 is installed with a first servo motor 292, the output end of the first servo motor 292 is installed with a double-strand pulley 293, the outer side of the double-strand pulley 293 is sleeved with two belts 294, the ends of the belts 294 away from the double-strand pulley 293 are sleeved with a single-strand pulley 295, the inner cavities of the single-strand pulleys 295 are installed with screw rods 296, one end of the screw rods 296 penetrates the fixed cover 27 and extends to its inner cavity, the inner cavity of the fixed cover 27 is rotatably connected with the screw rods 296 through bearings, The outer side of the screw rod 296 is threadedly connected with a threaded sleeve 297, and a long groove 210 is provided on the corresponding side of the fixed cover 27. A mounting seat 298 is installed at one end of the threaded sleeve 297. One side of the mounting seat 298 passes through the long groove 210 and is installed with a first monitor 299 and a first auxiliary lamp 2910. A slider 2911 is installed at the lower end of the threaded sleeve 297, and a slide groove 211 is provided at the bottom end of the inner cavity of the fixed cover 27 to slide therewith. A second monitor 2912 is installed at the middle part of the outer side of the driving shell 291, and a second auxiliary lamp 2913 is symmetrically installed on the outer side of the driving shell 291.

When the printing machine body 1 rotates a group of printing mechanisms 3 to the bottom of the printing mechanism 2, the hydraulic cylinder 22 is automatically opened and controlled by the external PLC controller in the printing machine body 1, and then the hydraulic cylinder 22 drives the first connecting member 23 and the support beam 24 to tilt and rotate downward by extending the hydraulic rod until the support beam 24 and the printing mechanism 3 are in parallel. In this process, the first servo motor 292, the first monitor 299, the first auxiliary light 2910, the second monitor 2912, and the second auxiliary light 2913 are turned on by the external PLC controller, and then the output end of the first servo motor 292 drives the double-strand pulley 293 to rotate, and the double-strand pulley 293 drives the two single-strand pulleys 295 and the screw rod 296 in the inner cavity to rotate through the belt 294, and the threaded sleeve 297 on the outer side of the screw rod 296 rotates accordingly. It moves left or right, and the slider 2911 at the lower end of the threaded sleeve 297 slides in the slide groove 211 of the inner cavity of the fixed cover 27, so that the threaded sleeve 297 can move stably, and the threaded sleeve 297 drives the mounting seat 298 and the first monitor 299 and the first auxiliary light 2910 on its outside to move, so that the first monitor 299 can perform horizontal scanning detection on the substrate placed on the printing mechanism 3 under the auxiliary lighting of the first auxiliary light 2910, thereby increasing the detection range, conveniently and effectively improving the accuracy of detecting curling, bulging, deflection or deformation of the substrate, and the second monitor 2912 can further detect abnormal conditions of the substrate under the auxiliary lighting of the second auxiliary light 2913, and further improve the detection efficiency and effect through multi-directional detection, which is convenient for use.

The upper end of the printing machine body 1 is connected and installed with multiple printing mechanisms 3, and the printing mechanism 3 includes a printing plate 31, an L-shaped groove 32, a rectangular groove 33, a second servo motor 34, a rotating shaft 35, a gear 37, an upper tooth plate 38, a lower tooth plate 39, a connecting plate 310 and a clamping assembly 311. One end of the printing plate 31 is installed in the printing machine body 1 through a mounting frame, and the upper end of the printing plate 31 is symmetrically provided with an L-shaped groove 32, and both sides of the L-shaped groove 32 are symmetrically provided with rectangular grooves 33. The inner cavity of the printing plate 31 is installed with a second servo motor 34, and the output end of the second servo motor 34 is connected to the rotating shaft 35. The outer side of the rotating shaft 35 is installed with a gear 37, and the upper and lower parts of the gear 37 are respectively meshed with the upper tooth plate 38 and the lower tooth plate 39. One side of the upper tooth plate 38 and the lower tooth plate 39 are connected to the clamping assembly 311 through a connecting plate 310. A bearing seat 36 is installed on one side of the inner cavity of the printing plate 31, and the bearing seat 36 is connected to the rotating shaft 3 5 are rotatably connected, the clamping assembly 311 includes a fixing rod 3111, a first L-shaped block 3112, an electric push rod 3113, a second L-shaped block 3114, a shift plate 3115 and a pressing block 3116, the fixing rod 3111 is connected to the connecting plate 310, both sides of the fixing rod 3111 pass through the rectangular groove 33 and extend to the outside thereof to connect to the first L-shaped block 3112, and the lower end of the first L-shaped block 3112 is equipped with an electric push rod 3113. 13. The output rod of the electric push rod 3113 passes through the first L-shaped block 3112 and is connected to the second L-shaped block 3114. The second L-shaped blocks 3114 are connected to a moving plate 3115. The moving plate 3115 is located above the L-shaped groove 32. A pressing block 3116 is equidistantly installed at the lower end of the moving plate 3115. A threaded groove 3117 is installed at the upper end of the moving plate 3115. The pressing block 3116 is in a cylindrical state and is made of rubber material.

The printing material (such as cloth) is manually placed on the upper end of the printing plate 31, and the excess area on the printing material (such as the area where printing is not required) is placed in the L-shaped groove 32. By turning on the switch of the electric push rod 3113, the output rod of the electric push rod 3113 drives the second L-shaped block 3114 to move downward, and then the second L-shaped block 3114 drives the shift plate 3115 to move downward, so that the cylindrical pressing blocks 3116 made of multiple rubber materials at the lower end of the shift plate 3115 are pressed down on the excess area on the printing material. Then, by turning on the switch of the second servo motor 34, the output end of the second servo motor 34 drives the rotating shaft 35 and the gear 37 on its outer side to rotate, and the rotating shaft 35 is rotatably connected to the bearing seat 36, which effectively makes the rotation operation of the rotating shaft 35 more stable, and the gear 37 drives the upper tooth plate 38 and the lower tooth plate 39 meshing therewith to move away from each other. , and then the upper tooth plate 38 and the lower tooth plate 39 respectively drive the clamping assembly 311 to move in the directions away from each other through the connecting plate 310, and the shifting plate 3115 of the clamping assembly 311 drives the pressing block 3116 and the excess part of the substrate pressed down by it to move in the opposite directions, so that the substrate is in a taut state, which effectively avoids the abnormal situation of the substrate and causes the printing effect to be reduced, and effectively improves the use effect. The threaded groove 3117 arranged on the upper end of the shifting plate 3115 can be screwed and installed with bolts and the threaded groove 3117 through an external clamping plate, so that when printing on a plate-type substrate, the substrate is clamped by two clamping plates, and the thickness of the clamping plate is lower than the height of the substrate, which is convenient for the substrate to be printed stably, and avoids displacement during rotation and transportation, causing printing failure and affecting work efficiency.

Working principle:

The present invention performs programming control connection with the hydraulic cylinder 22, the first servo motor 292, the first monitor 299, the first auxiliary light 2910, the second monitor 2912, the second auxiliary light 2913, the second servo motor 34, and the electric push rod 3113 through an external PLC controller, and this programming technology is a prior art and will not be described in detail here. The installation connection between the printing machine body 1 and the printing plate 31 of the printing mechanism 3 is also a prior art product technology and will not be described in detail here.

When in use, a substrate (such as cloth) is manually placed on the upper end of the substrate 31, and the excess area of the substrate is placed in the L-shaped groove 32. By turning on the switch of the electric push rod 3113, the output rod of the electric push rod 3113 drives the second L-shaped block 3114 to move downward, and then the second L-shaped block 3114 drives the shift plate 3115 to move downward, so that the multiple pressing blocks 3116 at the lower end of the shift plate 3115 press down on the excess area of the substrate. Then, by turning on the switch of the second servo motor 34, the output end of the second servo motor 34 drives the rotating shaft 35 The gear 37 on its outer side rotates, and the gear 37 drives the upper tooth plate 38 and the lower tooth plate 39 meshing therewith to move in directions away from each other, and then the upper tooth plate 38 and the lower tooth plate 39 respectively drive the clamping assembly 311 to move in directions away from each other through the connecting plate 310, and the shifting plate 3115 of the clamping assembly 311 drives the pressing block 3116 and the excess area on the substrate pressed by it to move in opposite directions, so that the substrate is in a tight state, effectively avoiding the situation that the substrate is abnormal, resulting in reduced printing effect, and effectively improving the use effect;

When a group of printing plates 31 of the printing machine body 1 rotate to the bottom of the printing mechanism 2, the hydraulic cylinder 22 is opened, and the hydraulic cylinder 22 drives the first connecting member 23 and the support beam 24 to tilt and rotate downward by extending the hydraulic rod until the support beam 24 and the printing mechanism 3 are in parallel. In this process, the double-strand pulley 293 is driven to rotate by the output end of the first servo motor 292, and the double-strand pulley 293 drives two single-strand pulleys 295 and the screw rod 296 in the inner cavity to rotate through the belt 294, and the threaded sleeve 297 on the outer side of the screw rod 296 moves left or right accordingly, and the threaded sleeve 297 drives the installation The seat 298 and the first monitor 299 and the first auxiliary light 2910 on its outer side are moved, so that the first monitor 299 can perform horizontal scanning detection on the substrate placed on the printing plate 31 under the auxiliary lighting of the first auxiliary light 2910, thereby increasing the detection range, conveniently and effectively improving the accuracy of detecting curling, bulges, deflections or deformations of the substrate, and the second monitor 2912 can further detect abnormal conditions of the substrate under the auxiliary lighting of the second auxiliary light 2913, and further improve the detection efficiency and effect through multi-directional detection, which is easy to use.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims (9)

1. An elliptical printing machine capable of automatically detecting the state of a substrate, comprising a printing machine body (1), characterized in that a plurality of printing mechanisms (2) are mounted on the upper end of the printing machine body (1), and a plurality of groups of printing mechanisms (3) are mounted on the upper end of the printing machine body (1); The printing mechanism (2) comprises a support frame (21), a hydraulic cylinder (22), a first connecting member (23), a support beam (24), a second connecting member (25), a connecting rod (26), a fixed cover (27), a printing screen (28) and a detection component (29). The hydraulic cylinder (22) is installed on one side of the support frame (21). The hydraulic cylinder (22) is movably connected to the first connecting member (23) through one end of the hydraulic rod. The lower end of the first connecting member (23) is installed with a support beam (24). The outer side of the support beam (24) is movably connected to the second connecting member (25) through a pin shaft. The second connecting member (25) is connected to the support frame (21). The lower end of the support beam (24) is respectively connected to the fixed cover (27) through two connecting rods (26). The printing screen (28) is installed between the fixed covers (27). The outer sides of the fixed covers (27) are connected to the detection component (29). 2. An elliptical printing machine capable of automatically detecting the state of a printing material according to claim 1, characterized in that: the detection component (29) comprises a driving shell (291), a first servo motor (292), a double-strand pulley (293), a belt (294), a single-strand pulley (295), a screw rod (296), a threaded sleeve (297), a mounting seat (298), a first monitor (299) and a first auxiliary lamp (2910), the driving shell (291) is mounted on the outside of two fixed covers (27), the first servo motor (292) is mounted in the inner cavity of the driving shell (291), the double-strand pulley (293) is mounted on the output end of the first servo motor (292), and the outer side of the double-strand pulley (293) is sleeved with two belts. A belt (294) is provided, and one end of the belt (294) away from the double-strand pulley (293) is sleeved with a single-strand pulley (295). The inner cavity of the single-strand pulley (295) is installed with a screw rod (296). One end of the screw rod (296) passes through the fixed cover (27) and extends to its inner cavity. The inner cavity of the fixed cover (27) is rotatably connected to the screw rod (296) through a bearing. The outer side of the screw rod (296) is screwed with a threaded sleeve (297). The corresponding side of the fixed cover (27) is provided with a long groove (210). One end of the threaded sleeve (297) is installed with a mounting seat (298). One side of the mounting seat (298) passes through the long groove (210) and is installed with a first monitor (299) and a first auxiliary light (2910). 3. An elliptical printing machine capable of automatically detecting the state of a substrate according to claim 2, characterized in that a slider (2911) is installed at the lower end of the threaded sleeve (297), and a slide groove (211) is provided at the bottom end of the inner cavity of the fixed cover (27) for sliding connection therewith. 4. An elliptical printing machine capable of automatically detecting the status of a printing material according to claim 2, characterized in that a second monitor (2912) is installed in the middle of the outer side of the driving shell (291), and a second auxiliary lamp (2913) is symmetrically installed on the outer side of the driving shell (291). 5. An elliptical printing machine capable of automatically detecting the state of a printing material according to claim 1, characterized in that: the printing mechanism (3) comprises a printing plate (31), an L-shaped groove (32), a rectangular groove (33), a second servo motor (34), a rotating shaft (35), a gear (37), an upper tooth plate (38), a lower tooth plate (39), a connecting plate (310) and a clamping assembly (311), one end of the printing plate (31) is mounted in the printing machine body (1) through a mounting frame, and the upper end of the printing plate (31) is symmetrically arranged An L-shaped groove (32), rectangular grooves (33) are symmetrically arranged on both sides of the L-shaped groove (32), a second servo motor (34) is installed in the inner cavity of the printing plate (31), the output end of the second servo motor (34) is connected to a rotating shaft (35), a gear (37) is installed on the outer side of the rotating shaft (35), the upper and lower parts of the gear (37) are respectively engaged with an upper tooth plate (38) and a lower tooth plate (39), and one side of the upper tooth plate (38) and the lower tooth plate (39) are connected to a clamping assembly (311) through a connecting plate (310). 6. An elliptical printing machine capable of automatically detecting the state of a printing substrate according to claim 5, characterized in that a bearing seat (36) is installed on one side of the inner cavity of the printing plate (31), and the bearing seat (36) is rotatably connected to the rotating shaft (35). 7. An elliptical printing machine capable of automatically detecting the state of a substrate according to claim 5, characterized in that: the clamping assembly (311) comprises a fixing rod (3111), a first L-shaped block (3112), an electric push rod (3113), a second L-shaped block (3114), a shift plate (3115) and a pressing block (3116), the fixing rod (3111) is connected to the connecting plate (310), both sides of the fixing rod (3111) pass through the rectangular groove (33) and extend to the fixing rod (3111). The outer side is connected to a first L-shaped block (3112), the lower end of each of the first L-shaped blocks (3112) is equipped with an electric push rod (3113), the output rod of the electric push rod (3113) passes through the first L-shaped block (3112) and is connected to a second L-shaped block (3114), the second L-shaped blocks (3114) are connected to a shift plate (3115), the shift plate (3115) is located above the L-shaped groove (32), and the lower end of the shift plate (3115) is equidistantly equipped with a pressing block (3116). 8. An elliptical printing machine capable of automatically detecting the state of a substrate according to claim 7, characterized in that a threaded groove (3117) is installed at the upper end of the shift plate (3115). 9. An elliptical printing machine capable of automatically detecting the state of a substrate according to claim 7, characterized in that the pressing block (3116) is in a cylindrical state and is made of rubber material.