Printing mechanism and roller reciprocating type screen printing machine

Abstract

The utility model belongs to the field of printing machines, particularly relates to a printing mechanism and a roller reciprocating type screen printing machine, and provides the following scheme aiming at the problem that when an existing roller serves as one of core components, the stability of the existing roller is often difficult to effectively guarantee due to the fact that limiting conditions of the roller in the moving process are poor when the existing roller reciprocates. Comprising a rack, three first conveying rollers are rotationally connected in the rack, two second conveying rollers are rotationally connected in the rack, and the three first conveying rollers and the two second conveying rollers are in transmission connection through a conveying belt. Accurate and consistent printing patterns are ensured, the printing quality problem caused by improper material conveying speed is effectively avoided, the printing precision and stability are improved, meanwhile, the reciprocating assembly enables the roller to rotate in a reciprocating mode, the printing head roller can move in a reciprocating mode, and the printing stability of the printing machine is enhanced.

Description

TECHNICAL FIELD

[0001] The utility model relates to printing machine technical field especially relates to a printing mechanism and cylinder reciprocating screen printing machine. BACKGROUND

[0002] As a common printing mode, screen printing has a wide application in packaging, advertisement, electronics and other fields, and the cylinder reciprocating screen printing machine realizes the printing of ink on the printing material through the cooperation of the reciprocating movement of the cylinder and the screen printing plate.

[0003] The existing printing mechanism and cylinder reciprocating screen printing machine still have some deficiencies in actual use process:

[0004] During the printing process, the cylinder as one of the core components is difficult to effectively guarantee the stability when reciprocating because of the poor limiting condition during the movement of the cylinder, and this defect directly leads to the frequent occurrence of blurred, ghosting and other quality problems which seriously affect the visual effect when printing patterns. UTILITY MODEL CONTENTS

[0005] The utility model aims at solving the existing technology that the cylinder as one of the core components is difficult to effectively guarantee the stability when reciprocating because of the poor limiting condition during the movement of the cylinder, and proposes a printing mechanism and cylinder reciprocating screen printing machine.

[0006] In order to realize the above-mentioned purpose, the utility model adopts the following technical scheme:

[0007] A printing mechanism and cylinder reciprocating screen printing machine, including the frame, the frame is rotatably connected with three first conveying rollers, the frame is rotatably connected with two second conveying rollers, the three first conveying rollers and two second conveying rollers are drivenly connected by the conveying belt, the top of the frame is fixedly installed with the top frame, the inside of the top frame is equipped with the cylinder, the bottom of the top frame is fixedly installed with the screen, and the cylinder is in close contact with the screen;

[0008] It also includes an intermittent assembly, the intermittent assembly is installed on one side of the frame, and the conveying belt can be intermittently conveyed through the intermittent assembly;

[0009] It also includes a reciprocating assembly, the reciprocating assembly is located in the top frame, and the cylinder can be reciprocatingly rotated through the reciprocating assembly.

[0010] In a possible design, the intermittent assembly includes a grooved wheel rotationally connected to one side of the frame, and a rotation axis of the grooved wheel is fixedly connected to one of the first conveying rollers; a first driving motor is fixedly installed on an inner wall of the one side of the frame; a cylindrical pin is rotationally connected to the one side of the frame, and the cylindrical pin is intermittently matched with the grooved wheel; and a rotation axis of one end of the cylindrical pin is fixedly connected to an output shaft of the first driving motor.

[0011] In a possible design, the reciprocating assembly includes two sliding blocks slidingly connected in the top frame; the inner walls of the sliding blocks are fixedly connected with sliding blocks; two rotating rods are rotationally connected in the top frame; the outer walls of the two rotating rods are both provided with reciprocating sliding grooves, and the sliding blocks slide in the sliding grooves; the sides, where the two sliding blocks are close to each other, are both rotationally connected with connecting shafts, and the ends, where the two connecting shafts are close to each other, are both fixedly connected with the roller; the outer walls of the two connecting shafts are both fixedly sleeved with gear wheels; two racks are fixedly connected in the top frame, and the racks are meshed with the gear wheels; a second driving motor is fixedly connected in the top frame; the rotation axes of the two rotating rods are both fixedly sleeved with sprockets at one end, and the sprockets are transmissionally connected by a chain.

[0012] In a possible design, a support plate is fixedly connected in the frame; a motor-driven push rod is fixedly connected to the top of the support plate; an elevating plate is fixedly connected to the output shaft of the motor-driven push rod at the top end; limiting sliding blocks are fixedly connected to the two sides of the elevating plate; the inner walls of the two sides of the frame are both provided with vertical grooves, and the two limiting sliding blocks both slide in the vertical grooves.

[0013] In a possible design, four sliding grooves are arranged in the frame; springs are fixedly connected in the four sliding grooves; hollow sliding blocks are slidingly connected in the four sliding grooves, and the four hollow sliding blocks are fixedly connected with the springs in a corresponding manner; and the rotation axes of the two second conveying rollers are both rotationally penetrated through the corresponding hollow sliding blocks.

[0014] A cylinder reciprocating screen printing machine includes the printing mechanism.

[0015] In the application, the packaging bag to be printed is placed on the conveying belt, the first driving motor is started, the cylindrical pin is driven to rotate by the first driving motor, the cylindrical pin intermittently drives the grooved wheel to rotate by cooperation with the grooved wheel, the grooved wheel drives one of the first conveying rollers to rotate, the three first conveying rollers and the two second conveying rollers are drivingly connected by the conveying belt, so that the packaging bag is conveyed, when the packaging bag is conveyed to the lifting plate, the conveying belt stops conveying because the grooved wheel rotates intermittently, the electric push rod is started, the lifting plate is pushed up by the output shaft of the electric push rod, the two second conveying rollers are driven to move close to each other by the lifting plate, when the second conveying rollers move close, the hollow sliding block is driven to compress the spring by the output shafts at the two ends of the second conveying rollers respectively, when the lifting plate lifts the packaging bag to the highest position, the second driving motor is started, the three sprockets drivingly connected by the chain are driven to rotate by the output shaft of the second driving motor, two of the sprockets drive the rotating rod to rotate, the reciprocating sliding groove on the outer wall of the rotating rod drives the sliding block on the inner wall of the sliding block to push, so that the sliding block reciprocally slides in the two top frames, the sliding block drives the connecting shaft to move, the gear is driven to rotate by the meshing with the connecting shaft, the connecting shaft drives the cylinder to rotate, the cylinder rotates on the screen, the screen is filled with ink, the ink is pushed to the packaging bag by the cylinder, after printing, the cylindrical pin continues to drive the grooved wheel to rotate, the printed packaging bag is conveyed away from the lifting plate, the unprinted packaging bag is conveyed to above the lifting plate, in the process, the lifting plate is retracted and extended by the output shaft of the electric push rod, so that the lifting plate realizes the process of descending and ascending, the unprinted packaging bag is attached to the bottom of the screen, so that printing is realized, in the whole process, the on-off electricity of the first driving motor, the electric push rod and the second driving motor is controlled by the PLC controller inputted with data in advance.

[0016] Beneficial effects: in the utility model, the intermittent assembly is set, the cylindrical pin and the grooved wheel are intermittently matched to realize the intermittent conveying of the conveying belt, the intermittent conveying mode can accurately control the material conveying rhythm in the printing process, ensures the accuracy and consistency of the printed pattern, avoids the printing quality problems caused by too fast or too slow continuous conveying of the material, and improves the printing precision and stability.

[0017] In the utility model, the reciprocating sliding groove on the outer wall of the rotating rod and the sliding block on the inner wall of the sliding block are slidably matched, the reciprocating rotation function makes the cylinder reciprocate in the printing process, and the reciprocating movement of the cylinder is more stable through the meshing rotation of the gear and the rack.

[0018] The utility model discloses a kind of printing mechanism and cylinder reciprocating formula silk screen printing machine, which is characterized by intermittent assembly, which realizes intermittent conveying of conveying belt, accurately controls the rhythm of material conveying, ensures the accuracy of printed patterns, effectively avoids the printing quality problem caused by improper material conveying speed, improves the printing precision and stability, and reciprocating assembly makes the cylinder reciprocating rotation, so that the printing head cylinder can reciprocate, enhancing the stability of the printing machine printing. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 A structure diagram of a printing mechanism and a cylinder reciprocating formula silk screen printing machine is provided for the utility model.

[0020] Figure 2 A sectional view structure diagram of a printing mechanism and a cylinder reciprocating formula silk screen printing machine rack is provided for the utility model.

[0021] Figure 3 A sectional view structure diagram of a printing mechanism and a cylinder reciprocating formula silk screen printing machine top frame is provided for the utility model.

[0022] Figure 4 A structure diagram of a printing mechanism and a cylinder reciprocating formula silk screen printing machine part rotating rod is provided for the utility model.

[0023] In the figure: 1, rack; 2, conveying belt; 3, top frame; 4, cylinder; 5, first conveying roller; 6, second conveying roller; 7, hollow sliding block; 8, spring; 9, lifting plate; 10, electric push rod; 11, support plate; 12, limiting sliding block; 13, grooved wheel; 14, first drive motor; 15, cylindrical pin; 16, second drive motor; 17, chain; 18, sliding block; 19, rotating rod; 20, rack; 21, chain wheel; 22, gear; 23, connecting shaft. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the utility model will be described clearly and completely below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments.

[0025] Embodiment 1: refer to Figure 1 and Figure 2A printing mechanism includes a frame 1, with three first conveyor rollers 5 rotatably connected inside the frame 1, and two second conveyor rollers 6 rotatably connected inside the frame 1. The three first conveyor rollers 5 and the two second conveyor rollers 6 are connected by a conveyor belt 2. A top frame 3 is fixedly installed on the top of the frame 1, and a roller 4 is provided inside the top frame 3. A screen is fixedly installed at the bottom of the top frame 3, and the roller 4 is in contact with the screen. The mechanism also includes an intermittent component, which is installed on one side of the frame 1 and can drive the conveyor belt 2 to intermittently convey materials. The mechanism also includes a reciprocating component, which is located inside the top frame 3 and can drive the roller 4 to reciprocate. Inside the frame 1, three first conveyor rollers 5 and two second conveyor rollers 6 are mounted via a rotatable connection. These three first conveyor rollers 5 and two second conveyor rollers 6 are connected by a conveyor belt 2 to form a complete conveying system. At the top of the frame 1, a top frame 3 is fixedly installed with bolts. Inside the top frame 3, a roller 4 is installed, and at the bottom of the top frame 3, a screen is fixedly installed with bolts. The screen is made of a soft material and has a hollowed-out pattern. By tightly adhering the roller 4 to the screen, the hollowed-out pattern of the screen can be printed onto the packaging bag. In addition, the printing mechanism also includes an intermittent component and a reciprocating component. The intermittent component is installed on one side of the frame 1 to drive the conveyor belt 2 to achieve intermittent conveying. The reciprocating component is located inside the top frame 3 to drive the roller 4 to rotate reciprocally, thereby achieving a more precise and efficient printing effect.

[0026] Reference Figure 2 The intermittent assembly includes a grooved wheel 13 rotatably connected to one side of the frame 1, with one end of the rotating shaft of the grooved wheel 13 fixedly connected to one of the first conveying rollers 5. A first drive motor 14 is fixedly installed on the inner wall of one side of the frame 1. A cylindrical pin 15 is rotatably connected to one side of the frame 1, and the cylindrical pin 15 intermittently engages with the grooved wheel 13. One end of the rotating shaft of the cylindrical pin 15 is fixedly connected to one end of the output shaft of the first drive motor 14. When the first drive motor 14 starts, it drives the cylindrical pin 15 to rotate. The intermittent engagement between the cylindrical pin 15 and the grooved wheel 13 causes the grooved wheel 13 to rotate intermittently, thereby driving the conveyor belt 2 to intermittently convey materials, meeting the intermittent material conveying requirements during the printing process.

[0027] Reference Figures 3-4The reciprocating assembly includes two sliding blocks 18 slidably connected within the top frame 3. A slider is fixedly connected to the inner wall of each sliding block 18. Two rotating rods 19 are rotatably connected within the top frame 3. The outer walls of both rotating rods 19 are provided with reciprocating grooves, and the slider slides within the grooves. A connecting shaft 23 is rotatably connected to the side of each sliding block 18 that is close to each other. The ends of the two connecting shafts 23 that are close to each other are fixedly connected to the roller 4. Gears 22 are fixedly sleeved on the outer walls of both connecting shafts 23. Two racks 20 are fixedly connected within the top frame 3, and the racks 20 and gears 22 mesh with each other. A second drive motor 16 is fixedly connected within the top frame 3. A sprocket 21 is fixedly sleeved on one end of the rotating shaft of each of the two rotating rods 19 and one end of the output shaft of the second drive motor 16. The three sprockets 21 are connected by a chain 17. When the second drive motor 16 starts, it drives the two rotating rods 19 to rotate through the transmission of the sprocket 21 and the chain 17. The reciprocating groove on the rotating rod 19 causes the sliding block 18 to slide back and forth, thereby driving the roller 4 to rotate back and forth through the meshing of the connecting shaft 23 and the gear 22 with the rack 20, thus realizing the printing action.

[0028] Reference Figure 2 A support plate 11 is fixedly connected inside the frame 1. An electric push rod 10 is fixedly connected to the top of the support plate 11. A lifting plate 9 is fixedly connected to the top of the output shaft of the electric push rod 10. Limiting sliders 12 are fixedly connected to both sides of the lifting plate 9. Vertical grooves are provided on the inner walls of both sides of the frame 1, and the two limiting sliders 12 slide within the vertical grooves. When the electric push rod 10 is activated, the extension and retraction of the output shaft of the electric push rod 10 will drive the lifting plate 9 to move up and down. The limiting sliders 12 slide within the vertical grooves, ensuring the stability of the movement of the lifting plate 9, thereby making the packaging bag fit tightly against the screen and achieving better printing results.

[0029] Example 2: Reference Figure 2 An improvement upon Embodiment 1: The frame 1 contains four sliding grooves, each with a fixed spring 8 and a slidable hollow slider 7. The four hollow sliders 7 are correspondingly fixedly connected to the springs 8. The rotating shafts of the two second conveyor rollers 6 rotate through the corresponding hollow sliders 7. When the lifting plate 9 rises or falls, the conveyor belt 2 causes the second conveyor rollers 6 to move closer together or further apart. The hollow sliders 7 slide within the grooves, compressing or stretching the springs 8, thereby automatically adjusting the position of the second conveyor rollers 6 to make way for the lifting of the packaging bags.

[0030] refer to Figures 1-4 A reciprocating roller screen printing machine includes a printing mechanism as described above. Through the coordinated operation of various components within the printing mechanism, this reciprocating roller screen printing machine achieves functions such as intermittent material conveying, reciprocating roller printing, and height adjustment of the items to be printed. It can meet the printing needs of materials of different specifications and has advantages such as high printing accuracy, high production efficiency, and strong adaptability.

[0031] However, as is well known to those skilled in the art, the working principles and wiring methods of the electric actuator 10, the first drive motor 14, and the second drive motor 16 are commonplace and are all conventional methods or common knowledge. They will not be described in detail here. Those skilled in the art can make any selections according to their needs or convenience.

[0032] The accompanying drawings in this application are for illustrative purposes only. The dimensions and shapes of the components shown are not actual limitations, but are merely schematic representations. In actual implementation, the components can be reasonably configured and adjusted according to specific needs and actual conditions.

[0033] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A printing mechanism, characterized in that, include: The top frame (3) is provided with a roller (4), and a wire mesh is fixedly installed at the bottom of the top frame (3), and the roller (4) is in contact with the wire mesh; It also includes a reciprocating assembly, which is located inside the top frame (3) and can drive the roller (4) to rotate back and forth.

2. The printing mechanism according to claim 1, characterized in that, The reciprocating assembly includes two sliding blocks (18) slidably connected in the top frame (3). A slider is fixedly connected to the inner wall of the sliding block (18). Two rotating rods (19) are rotatably connected in the top frame (3). The outer walls of the two rotating rods (19) are provided with reciprocating grooves, and the slider slides in the grooves. A connecting shaft (23) is rotatably connected to the side of the two sliding blocks (18) that is close to each other. The ends of the two connecting shafts (23) that are close to each other are fixedly connected to the roller (4). Gears (22) are fixedly sleeved on the outer walls of the two connecting shafts (23). Two racks (20) are fixedly connected in the top frame (3), and the racks (20) and gears (22) mesh with each other. A second drive motor (16) is fixedly connected in the top frame (3). A sprocket (21) is fixedly sleeved on one end of the rotating shaft of the two rotating rods (19) and one end of the output shaft of the second drive motor (16). The three sprockets (21) are connected by a chain (17).

3. A reciprocating roller screen printing machine, comprising the printing mechanism according to any one of claims 1-2, characterized in that, It also includes a frame (1), the top frame (3) is installed on the top of the frame (1), three first conveying rollers (5) are rotatably connected inside the frame (1), and two second conveying rollers (6) are rotatably connected inside the frame (1). The three first conveying rollers (5) and the two second conveying rollers (6) are connected by a conveyor belt (2). It also includes an intermittent component, which is installed on one side of the frame (1) and can drive the conveyor belt (2) to transport intermittently.

4. A reciprocating roller screen printing machine according to claim 3, characterized in that, The intermittent assembly includes a grooved wheel (13) rotatably connected to one side of the frame (1), and one end of the rotating shaft of the grooved wheel (13) is fixedly connected to one of the first conveying rollers (5). A first drive motor (14) is fixedly installed on the inner wall of one side of the frame (1). A cylindrical pin (15) is rotatably connected to one side of the frame (1), and the cylindrical pin (15) and the grooved wheel (13) are intermittently engaged. One end of the rotating shaft of the cylindrical pin (15) is fixedly connected to one end of the output shaft of the first drive motor (14).

5. A reciprocating roller screen printing machine according to claim 3, characterized in that, A support plate (11) is fixedly connected inside the frame (1). An electric push rod (10) is fixedly connected to the top of the support plate (11). A lifting plate (9) is fixedly connected to the top of the output shaft of the electric push rod (10). Limiting sliders (12) are fixedly connected to both sides of the lifting plate (9). Vertical grooves are provided on both sides of the inner wall of the frame (1), and the two limiting sliders (12) slide in the vertical grooves.

6. A reciprocating roller screen printing machine according to claim 3, characterized in that, The frame (1) is provided with four sliding grooves, each of which is fixedly connected with a spring (8), and each of which is slidably connected with a hollow slider (7). The four hollow sliders (7) are fixedly connected to the springs (8), and the two ends of the rotating shafts of the two second conveying rollers (6) rotate through the corresponding hollow sliders (7).

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