A metal plate printing machine

Abstract

The application discloses a metal plate printing machine and relates to the technical field of printing equipment, which comprises a printing machine body, a feeding table, a standby material area, a mounting frame, a material taking column, a silica gel suction cup, a driving part and a control assembly. The material taking column is located directly above the standby material area and is provided in multiple and in intervals along the feeding direction. The silica gel suction cup is used for adsorbing the metal plate when the material taking column moves downward. The driving part is used for driving the material taking column to move up and down. The control assembly is used for controlling the feeding table to move away from the printing machine body when the material taking column moves downward and is used for controlling the feeding table to move close to the printing machine body when the material taking column moves upward. The silica gel suction cup is used for adsorbing the metal plate above a conveying belt when the feeding table moves close to the printing machine body. The air inlet assembly is used for supplying air into the silica gel suction cup when the silica gel suction cup moves to the position above the conveying belt, and the conveying belt is used for conveying the metal plate towards the printing machine body at this time. The application can reduce the possibility of deformation and damage of the metal plate in the feeding process.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of printing equipment, in particular to a metal plate printing machine. BACKGROUND

[0002] In the production of metal bottle caps, metal plates are usually input into a punch and then formed by punching. In order to make the bottle caps formed by punching have patterns, logos, etc., the metal plate printing machine is generally used to print patterns, logos, etc. on the metal plate before punching.

[0003] The common metal plate printing machine is provided with a feeding device for continuously feeding the metal plates to be printed to the printing machine. The traditional feeding device includes a feeding seat fixed on the feeding side of the printing machine, a plurality of transmission rollers are rotatably connected to the feeding seat along the transmission direction, and the transmission rollers are driven to rotate to drive the metal plates to move. The feeding seat is provided with a hopper, and the hopper is located directly above the transmission rollers, and the metal plates are uniformly stacked in the hopper. There is a certain gap between the bottom of the hopper and the transmission rollers. When feeding, the metal plates contact the transmission rollers, and the transmission rollers drive the metal plates to move from the gap between the hopper and the transmission rollers to the printing machine through friction. After the lowermost metal plate is transmitted, the adjacent metal plates above move downward to contact the transmission rollers under the action of gravity, and then the above transmission process is repeated.

[0004] However, the metal plate used for bottle cap punching is relatively thin, and the contact area between the metal plate and the transmission roller during transmission is small, so the force acting on the metal plate is large and not uniform, and the metal plate may be deformed or damaged during transmission, which ultimately affects the quality of the finished bottle cap. SUMMARY

[0005] In order to reduce the possibility of deformation and damage of the metal plate during feeding, the present application provides a metal plate printing machine.

[0006] The present application provides a metal plate printing machine, which adopts the following technical scheme:

[0007] A metal plate printing machine comprises

[0008] A printing machine body;

[0009] A feeding table is slidably arranged on the feeding side of the printing machine body, and the feeding table can approach or move away from the printing machine body along the feeding direction;

[0010] A standby area is arranged on the top of the feeding table;

[0011] A mounting bracket is arranged on the feeding table;

[0012] A material taking column is slidably arranged on the mounting bracket, and the material taking column is located directly above the standby area and is spaced apart along the feeding direction.

[0013] A silica gel suction cup is arranged at the bottom of the material taking column, and the silica gel suction cup adsorbs the metal plate when the material taking column moves downward;

[0014] A driving member is arranged on the mounting frame, and the driving member drives the material taking column to move up and down;

[0015] A control assembly is arranged on the mounting frame, and the control assembly controls the feeding table to move away from the printing machine body when the material taking column moves downward, and the control assembly controls the feeding table to move close to the printing machine body when the material taking column moves upward;

[0016] A conveying belt is arranged in a rotating manner between the feeding table and the printing machine body, and the silica gel suction cup adsorbs the metal plate above the conveying belt when the feeding table moves close to the printing machine body;

[0017] An air inlet assembly is arranged on the material taking column, and the air inlet assembly supplies air to the silica gel suction cup when the silica gel suction cup adsorbs the metal plate to move above the conveying belt, and at this time, the conveying belt conveys the metal plate to the printing machine body.

[0018] By adopting the above technical scheme, when the printing machine body and the driving member are started, the driving member drives the material taking column to move downward, so that the silica gel suction cup adsorbs the metal plate to be printed, and at the same time, the control assembly controls the feeding table to move away from the printing machine body; then the driving assembly drives the material taking column to move upward, and during the upward movement, the control assembly controls the feeding table to move close to the printing machine body, so that the metal plate to be printed can move to the top of the conveying belt, and then air is supplied through the air inlet assembly, so that the adsorption of the silica gel suction cup to the metal plate to be printed can be reduced, and finally the metal plate is conveyed to the printing machine body through the conveying belt. The whole process is simple, and when the metal plate is conveyed to the printing machine body through the conveying belt, the stress is uniform, the possibility of deformation and damage is reduced, and there is a certain conveying interval between adjacent metal plates, so that the printing machine body has sufficient time to print the metal plate.

[0019] Optionally, the control assembly comprises a control column, a control block and a control tension spring.

[0020] The control tension spring is arranged between the printing machine body and the feeding table, and the control tension spring drives the feeding table to move toward the printing machine body.

[0021] The control column is arranged on the printing machine body, the control column corresponds to the material taking column one by one and is perpendicular to the material taking column, and the control column is located on the side of the material taking column close to the printing machine body.

[0022] The control block is disposed on the material feeding column, and the bottom of the control block is inclined to form a control surface. The control column slides on the control surface. When the control column slides on the control surface, the loading platform moves away from the printing machine body.

[0023] By adopting the above technical solution, when the control column moves away from the material picker column by sliding on the control surface towards the control block, it pushes the loading platform away from the printing machine body; when the control column moves towards the side wall of the material picker column by sliding on the control surface, the loading platform moves closer to the printing machine body.

[0024] Optionally, the control column is formed with an arc-shaped guide surface that slides on the control surface when the material picking column moves downward.

[0025] By adopting the above technical solution, the friction generated during sliding is reduced.

[0026] Optionally, the air intake assembly includes an air intake pipe, a sealing ball, and a push spring;

[0027] The material receiving column has a receiving groove, which is located near the bottom of the control surface. The sealing ball slides in the receiving groove, and the opening of the receiving groove is provided with a limiting member to prevent the sealing ball from detaching.

[0028] The push spring is installed in the receiving groove, and the push spring pushes the sealing ball to protrude out of the receiving groove;

[0029] The air inlet pipe is located inside the material receiving column, with one side of the air inlet pipe connected to the receiving groove and the other side connected to the silicone suction cup.

[0030] By adopting the above technical solution, when the control column slides on the sealing ball, it pushes the sealing ball into the receiving groove, causing the receiving groove to be released from the sealing state. At this time, air enters the silicone suction cup through the air inlet pipe, which reduces the ability of the silicone suction cup to adsorb the metal plate to be printed.

[0031] Optionally, the limiting element is a retaining ring, which is engaged with the material receiving column and located at the opening of the receiving groove, and the inner diameter of the retaining ring is smaller than the diameter of the sealing ball.

[0032] By adopting the above technical solutions, the installation difficulty of the sealing ball is reduced.

[0033] Optionally, the driving component is a driving cylinder, and the driving cylinder is disposed on the mounting bracket;

[0034] A linkage plate is provided between the material picking columns, and the piston rod of the drive cylinder is connected to the linkage plate.

[0035] By adopting the above technical solution, the driving cylinder drives the linkage plate to move up and down, so that the material picking column can move up and down at the same time.

[0036] Optionally, the taking column comprises a column body, an upper baffle, a lower baffle and an elastic power element.

[0037] The column body slides up and down on the linkage plate, and the upper baffle is arranged on the top outer periphery of the column body.

[0038] The lower baffle slides up and down on the outer periphery of the column body, and the elastic power element is arranged on the column body, and the elastic power element pushes the lower baffle to cooperate with the upper baffle to clamp the linkage plate.

[0039] By adopting the above technical scheme, the upper baffle and the lower baffle cooperate to clamp the linkage plate, when the stacking thickness of the to-be-printed metal plate is relatively thick, the linkage plate can drive the lower baffle to move downward, so that the taking column can adapt to the to-be-printed metal plate with different stacking thicknesses.

[0040] Optionally, the elastic power element is a power spring, and a connecting groove is formed on the outer periphery of the column body, and the lower baffle slides up and down in the connecting groove.

[0041] The power spring is installed in the connecting groove, one end of the power spring abuts against the top of the lower baffle, and the other end abuts against the bottom groove wall of the connecting groove.

[0042] By adopting the above technical scheme, the power spring is released, so that the lower baffle can move upward, which is conducive to clamping the linkage plate in cooperation with the upper baffle.

[0043] In summary, the present application has at least one of the following beneficial effects:

[0044] 1. The to-be-printed metal plate is adsorbed by the silica gel suction cup and is driven to the conveying belt, and is transmitted by the conveying belt, so that the metal plate is uniformly stressed in the conveying process, and the possibility of deformation and damage is reduced.

[0045] 2. The upper baffle and the lower baffle cooperate to clamp the linkage plate, when the stacking thickness of the to-be-printed metal plate is relatively thick, the linkage plate can drive the lower baffle to move downward, so that the taking column can adapt to the to-be-printed metal plate with different stacking thicknesses. BRIEF DESCRIPTION OF DRAWINGS

[0046] Figure 1 is a whole structure schematic diagram of the embodiment of the present application;

[0047] Figure 2 is an internal cross-sectional schematic diagram of the embodiment of the present application;

[0048] Figure 3 is an enlarged schematic diagram of A part of Figure 1

[0049] Figure 4 is Figure 2 ​a B part enlarged schematic view of

[0050] Figure 5 is Figure 2 a C part enlarged schematic view of

[0051] Fig. 1 is a schematic view of a printing machine body; Fig. 2 is a schematic view of a feeding table; Fig. 3 is a schematic view of a material taking column; Fig. 4 is a schematic view of a silica gel suction cup; Fig. 5 is a schematic view of a conveying belt; Fig. 6 is a schematic view of an air inlet assembly; Fig. 7 is a schematic view of a control tension spring; Fig. 8 is a schematic view of a driving air cylinder. DETAILED DESCRIPTION

[0052] The following will be described in detail in combination with the accompanying Figures 1-5 The present application will be further described in detail.

[0053] The present application discloses a metal plate printing machine. Referring to Figure 1 The printing machine comprises a printing machine body 1, and the metal plate is printed in the printing machine body 1.

[0054] Referring to Figure 1 and Figure 2 The printing machine further comprises a feeding table 2 and a material waiting area 21; the printing machine body 1 is symmetrically fixed with two guide rails 11 extending away from the feeding side, and the extension direction of the guide rail 11 is parallel to the feeding transmission direction of the printing machine body 1. The feeding table 2 is a cuboid structure, and the feeding table 2 is located on the feeding side of the printing machine body 1 and is slidingly connected to the guide rail 11; the length direction of the feeding table 2 is parallel to the length direction of the guide rail 11, and the feeding table 2 can be close to or away from the printing machine body 1 when sliding. The material waiting area 21 is located on the top of the feeding table 2, and the metal plates to be printed are stacked in the material waiting area 21.

[0055] Referring to Figure 2 and Figure 3, the printing machine further comprises a mounting frame 22, a taking column 3, a silica gel suction cup 4 and a driving member; the mounting frame 22 is composed of multiple groups of mounting plates and is arranged in the direction away from the printing machine body 1, each group of mounting plates is symmetrically provided with two, the mounting plates are fixed on the top of the feeding table 2, and the metal plate to be printed is located between the opposite mounting plates. The driving member is a driving cylinder 8 and is symmetrically arranged, the driving cylinder 8 is fixed on the mounting frame 22 through a support, the driving cylinder 8 is connected with an external air source and the piston rod is arranged upwards, and the driving cylinder 8 can continuously circulate between the forward stroke and the reverse stroke. The top of the piston rod of the driving cylinder 8 is fixed with a linkage plate 81 of a cross structure, the middle of the linkage plate 81 is long and the two sides are short, the length direction of the linkage plate 81 is parallel to the sliding direction of the feeding table 2, and the driving cylinder 8 drives the linkage plate 81 to move up and down when the driving cylinder 8 is started.

[0056] The taking column 3 is of a cuboid structure, there are multiple taking columns 3 and they are uniformly and interval arranged along the length direction of the linkage plate 81, a support plate corresponding to the taking column 3 is fixedly connected between the two mounting plates, and the taking column 3 slides up and down on the support plate. The silica gel suction cup 4 corresponds to the taking column 3 in one-to-one correspondence, and the silica gel suction cup 4 is fixed to the bottom of the taking column 3. When the driving cylinder 8 drives the linkage plate 81 to move downwards, the linkage plate 81 drives the taking column 3 to move downwards until the silica gel suction cup 4 abuts against the metal plate to be printed, at this time, the taking column 3 continuously moves downwards to press the silica gel suction cup 4, air in the silica gel suction cup 4 is discharged, so that the metal plate to be printed is adsorbed by the silica gel suction cup 4, and then the driving cylinder 8 drives the linkage plate 81 to move upwards, the taking column 3 drives the metal plate to be printed to move upwards through the silica gel suction cup 4.

[0057] The printing machine further comprises a conveying belt 5, and two connecting plates are symmetrically fixed on the feeding side of the printing machine body 1. Two groups of rotating rollers are symmetrically rotated up and down between the opposite connecting plates, and the conveying belt 5 has two and corresponds to the two groups of rotating rollers respectively. Each group of rotating rollers has two, one rotating shaft of each group is fixed with a connecting gear on the outer circumferential side, and the upper and lower connecting gears are meshed with each other. The printing machine body 1 is provided with a driving motor, and the driving motor is connected with one rotating roller. The conveying belt 5 is connected in a head-to-tail mode and is sleeved on the outer circumferential side of the same group of two rotating rollers, so that the conveying belt 5 is located between the printing machine body 1 and the feeding table 2 and above the metal plate to be printed. When working, the driving motor drives the rotating rollers to rotate, so that the conveying belt can transmit the metal plate to be printed in the direction of the printing machine body 1. There is a gap between the upper and lower conveying belts 5, and the metal plate to be printed is transmitted from between the upper and lower conveying belts 5 to the printing machine body 1.

[0058] The printing machine further comprises a control assembly, which comprises a control column 72, a control block 71 and control tension springs 7. The control tension springs 7 are arranged between the printing machine body 1 and the feeding table 2, and one end of each control tension spring 7 is fixed to the printing machine body 1 and the other end is fixed to the side wall of the feeding table 2. In the initial state, the control tension springs 7 are elastically released, and pulling the feeding table 2 towards the printing machine body 1 enables the material taking column 3 close to the printing machine body 1 to be located adjacent to the conveying belt 5, and at this time, the part of the metal plate to be printed close to the printing machine body 1 is located directly below the conveying belt 5.

[0059] The control column 72 corresponds to the material taking column 3 one by one, and the control column 72 is located on the side of the material taking column 3 close to the printing machine body 1. The control column 72 is a long square column structure, and the control column 72 is perpendicular to the material taking column 3 and both ends are fixed on the carrier extendedly arranged on the printing machine body 1. The control block 71 corresponds to the material taking column 3 one by one and is fixed on the side wall of the material taking column 3, and the control block 71 is located on the side of the material taking column 3 close to the printing machine body 1. The bottom of the control column 72 is inclined to form a control surface 711, and the top of the control column 72 is formed with an arc-shaped guide surface 721. When the driving cylinder 8 drives the linkage plate 81 to move upwards to stop, the control block 71 is located directly above the control column 72, and the side of the material taking column 3 close to the printing machine body 1 abuts against the control column 72.

[0060] When the driving cylinder 8 drives the linkage plate 81 to move downwards, the control block 71 first approaches the control column 72, and then the arc-shaped guide surface 721 slides on the control surface 711. At this time, the material taking column 3 transmits power through the supporting plate, so that the feeding table 2 moves away from the printing machine body 1, and the control tension spring 7 enters the stretching state, until the control column 72 slides on the side wall of the control block 71 close to the printing machine body 1. At this time, the material taking column 3 is away from the conveying belt 5, and the side of the metal plate to be printed close to the printing machine body 1 has a spacing from the side of the conveying belt 5 away from the printing machine body 1.

[0061] When the driving assembly moves upwards, the control column 72 slides on the side of the control block 71 close to the printing machine body 1 and gradually approaches the control surface 711, until the control column 72 slides on the control surface 711 towards the side wall of the material taking column 3. At this time, the control tension spring 7 pulls the feeding table 2 close to the printing machine body 1; the metal plate to be printed gradually moves upwards and approaches the gap between the two conveying belts 5, until the control column 72 is separated from the control surface 711 and abuts against the side wall of the material taking column 3, and the metal to be printed enters between the two conveying belts 5. When the metal plate to be printed is in contact with the lower conveying belt 5 during movement, due to the thin thickness of the metal plate to be printed, slight bending can be generated without creases on the metal plate to be printed, so that the metal plate to be printed moves between the two conveying belts 5.

[0062] Referring to Figure 3 and Figure 4, the printing machine further comprises an air inlet assembly 6, which comprises an air inlet pipe 61, a blocking ball 62 and a pushing spring 63. The material taking column 3 is formed with a containing groove 31, which extends towards the printing machine body 1 and penetrates through the control block 71 to the outside, and the slot opening of the containing groove 31 is located at the position close to the bottom of the control surface 711. The blocking ball 62 slides in the containing groove 31, and the material taking column 3 is provided with a limiting piece, which is a clamping ring 32 clamped and fixed on the material taking column 3 and located at the slot opening position of the containing groove 31, and the inner diameter of the clamping ring 32 is smaller than the diameter of the blocking ball 62. The pushing spring 63 is installed in the containing groove 31, one end of the pushing spring 63 abuts against the blocking ball 62, and the other end abuts against the groove wall of the containing groove 31 away from the slot opening. When the pushing spring 63 is elastically released, the blocking ball 62 partially protrudes out of the containing groove 31. The air inlet pipe 61 is fixed in the material taking column 3 and the silica gel suction plate 4, one side hole of the air inlet pipe 61 is located at the groove wall of the containing groove 31, and the other side hole is located at the middle position of the bottom of the silica gel suction plate 4.

[0063] In the initial state, the blocking ball 62 partially protrudes out of the containing groove 31, and at this time, the containing groove 31 is blocked. When the control column 72 and the control surface 711 slide to the side wall of the material taking column 3, the control column 72 slides on the outer circumferential side of the blocking ball 62, at this time, the control column 72 pushes the blocking ball 62 to slide into the containing groove 31, at this time, air enters the containing groove 31, and along the air inlet pipe 61, enters the silica gel suction plate 4, at this time, the adsorption capacity of the silica gel suction plate 4 to the metal plate to be printed is greatly reduced, and when the conveying belt 5 (the conveying belt 5 is marked in the middle) is transmitted, it can drive the metal plate to be printed to move. When the control column 72 is away from the blocking ball 62, the blocking ball 62 partially protrudes out of the containing groove 31 under the pushing of the pushing spring 63, at this time, the containing groove 31 is blocked, and the silica gel suction plate 4 can adsorb the metal plate to be printed again. Figure 2

[0064] Please refer to Figure 3 and Figure 5 , in order to enable the material taking column 3 to adsorb more metal plates to be printed and adapt to the stacking thickness of the metal plates to be printed, the material taking column 3 comprises a column body 33, an upper baffle 34, a lower baffle 35 and an elastic power piece. The linkage plate 81 is formed with a sliding hole, the column body 33 slides up and down in the sliding hole, the silica gel suction plate 4 is fixed at the bottom of the column body 33, and the upper baffle 34 is fixed at the top of the column body 33 and used to limit the column body 33 from being separated downward from the sliding hole.

[0065] The side wall of the column body 33 is formed with a connecting groove 37 in a "T" shape structure in the vertical direction, the lower baffle 35 is in a "T" shape structure, and the lower baffle 35 slides up and down in the connecting groove 37 and partially protrudes out of the connecting groove 37. The lower baffle 35 is located below the linkage plate 81, and when the lower baffle 35 slides to abut against the top groove wall of the connecting groove 37, the lower baffle 35 cooperates with the upper baffle 34 to clamp the linkage plate 81.

[0066] ​The elastic power member is a power spring 36, which is installed in a connecting groove 37, the top of the power spring 36 abuts against the bottom of the lower baffle 35, and the bottom of the power spring 36 abuts against the bottom groove wall of the connecting groove 37. In the initial state, the power spring 36 is in a released state, at this time, the lower baffle 35 cooperates with the upper baffle 34 to clamp the linkage plate 81.

[0067] When the column 33 moves downward to abut against the silicone suction disc 4, the linkage plate 81 is driven by the lower baffle 35 to make the column 33 continue to move downward to press the silicone suction disc 4, so that the silicone suction disc 4 adsorbs the metal plate to be printed. When the thickness of the stacked metal plate to be printed is relatively thick, the linkage plate 81 continues to move downward when the silicone suction disc 4 adsorbs the metal plate to be printed, at this time, the linkage plate 81 drives the lower baffle 35 to slide downward. When the number of the stacked metal plate to be printed is continuously reduced, the position of the silicone suction disc 4 adsorbing the metal plate to be printed is continuously lowered, and the distance of the linkage plate 81 driving the lower baffle 35 to move downward is continuously shortened.

[0068] The embodiment of the metal plate printing machine of the present application has the following advantages:

[0069] When processing, the printing machine body 1 and the driving cylinder 8 are started, the driving cylinder 8 drives the material taking column 3 to continuously move up and down through the linkage plate 81, when the material taking column 3 moves up and down, the silicone suction disc 4 adsorbs the metal plate to be printed and transports it between the upper and lower conveying belts 5, and the conveying belt 5 transports the metal plate to be printed to the printing machine body 1, so that the metal plate to be printed is evenly stressed when conveying, and the possibility of forming and damaging is reduced; and the adjacent metal plates to be printed have a certain spacing, so that the printing machine body 1 has enough reaction time for printing work.

[0070] The above are the preferred embodiments of the present application, which do not limit the protection scope of the present application, therefore: any equivalent changes made on the structure, shape, principle of the present application should be covered in the protection scope of the present application.

Claims

1. A sheet metal printing press characterized by: The utility model relates to a printing machine body (1); The upper material loading table (2) is slidably arranged on the feeding side of the printing machine body (1), and the upper material loading table (2) can move towards or away from the printing machine body (1) along the feeding direction; The material waiting area (21) is arranged on the top of the upper material loading table (2); The mounting frame (22) is arranged on the upper material loading table (2); The material taking column (3) is slidably arranged on the mounting frame (22) in the up-down direction, the material taking column (3) is located directly above the material waiting area (21), and a plurality of material taking columns (3) are arranged at intervals along the feeding direction; The silica gel suction cup (4) is arranged at the bottom of the material taking column (3), and the silica gel suction cup (4) can adsorb the metal plate when the material taking column (3) moves downwards; The driving element is arranged on the mounting frame (22), and the driving element drives the material taking column (3) to move up and down; The control assembly controls the upper material loading table (2) to move away from the printing machine body (1) when the material taking column (3) moves downwards, and the control assembly controls the upper material loading table (2) to move towards the printing machine body (1) when the material taking column (3) moves upwards; The conveying belt (5) is connected at the head and tail and rotatably arranged between the upper material loading table (2) and the printing machine body (1), and the silica gel suction cup (4) can adsorb the metal plate above the conveying belt (5) when the upper material loading table (2) moves towards the printing machine body (1); The air inlet assembly (6) is arranged on the material taking column (3), the air inlet assembly (6) supplies air to the silica gel suction cup (4) when the silica gel suction cup (4) adsorbs the metal plate and moves above the conveying belt (5), and at this time, the conveying belt (5) conveys the metal plate towards the printing machine body (1); The control assembly comprises a control column (72), a control block (71) and a control tension spring (7); The control tension spring (7) is arranged between the printing machine body (1) and the upper material loading table (2), and the control tension spring (7) drives the upper material loading table (2) to move towards the printing machine body (1); The control column (72) is arranged on the printing machine body (1), the control column (72) corresponds to the material taking column (3) one by one and is perpendicular to the material taking column (3), and the control column (72) is located on the side of the material taking column (3) close to the printing machine body (1); The control block (71) is arranged on the material taking column (3), the bottom of the control block (71) is inclined to form a control surface (711), the control column (72) slides on the control surface (711), and when the material taking column (3) moves downwards and the control column (72) slides on the control surface (711), the upper material loading table (2) moves away from the printing machine body (1). The control column (72) forms an arc-shaped guide surface (721) on which the material taking column (3) slides when the material taking column (3) moves downwards.

2. A metal plate printer according to claim 1, characterized in that: The air inlet assembly (6) comprises an air inlet pipe (61), a blocking ball (62) and a pushing spring (63).

3. A metal plate printer according to claim 1, wherein: ​ The taking column (3) is formed with a containing groove (31) located at a position close to the bottom of the control surface (711), the blocking ball (62) slides in the containing groove (31), and the containing groove (31) is provided with a limiting member for limiting the blocking ball (62) from being separated; The pushing spring (63) is installed in the containing groove (31), and the pushing spring (63) pushes the blocking ball (62) to protrude out of the containing groove (31); The air inlet pipe (61) is arranged in the taking column (3), one side of the air inlet pipe (61) is communicated with the containing groove (31), and the other side is communicated with the silica gel suction cup (4).

4. A metal plate printer according to claim 3, wherein: The limiting member is a snap ring (32), the snap ring (32) is clamped in the taking column (3) and located at the groove opening of the containing groove (31), and the inner diameter of the snap ring (32) is smaller than the diameter of the blocking ball (62).

5. A sheet metal printer as claimed in claim 1, characterized in that: The driving member is a driving air cylinder (8), and the driving air cylinder (8) is arranged in the mounting frame (22). The taking column (3) is provided with a linkage plate (81), and the piston rod of the driving air cylinder (8) is connected to the linkage plate (81).

6. A metal plate printer according to claim 5, wherein: The taking column (3) comprises a column body (33), an upper baffle (34), a lower baffle (35) and an elastic power member; The column body (33) slides up and down on the linkage plate (81), and the upper baffle (34) is arranged on the top outer periphery of the column body (33); The lower baffle (35) slides up and down on the outer periphery of the column body (33), and the elastic power member is arranged in the column body (33), and the elastic power member pushes the lower baffle (35) to cooperate with the upper baffle (34) to clamp the linkage plate (81).

7. A metal plate printer according to claim 6, characterized in that: The elastic power member is a power spring (36), the outer periphery of the column body (33) is formed with a connecting groove (37), and the lower baffle (35) slides up and down in the connecting groove (37); The power spring (36) is installed in the connecting groove (37), one end of the power spring (36) abuts against the top of the lower baffle (35), and the other end abuts against the bottom groove wall of the connecting groove (37).

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