A positioning device for a printing press

Abstract

The present disclosure provides a positioning device for a printing machine, belonging to the technical field of printing machines, comprising: a shell, a conveying belt is rotatably arranged in the shell through a driving mechanism, and the outer wall of the conveying belt is in contact with the inner wall of the shell, a plurality of adsorption holes are evenly arranged on the conveying belt, and a gas pump is arranged in the conveying belt. When the improved positioning device for the printing machine is used, the printing material is moved to the required position through the conveying belt, and an adsorption force is generated between the conveying belt and the printing material through the gas pump, so that the position deviation of the printing material caused by external airflow is avoided, the printing effect of the printing machine is affected, a directional airflow is formed on the top side of the printing material, the cleaning of the attached objects on the printing material is completed before printing, and the printed patterns on the printing material are dried after printing, so that the printing effect of the printing machine is good.

Description

Technical Field

[0001] This utility model relates to the technical field of printing presses, and specifically to a positioning device for printing presses. Background Technology

[0002] A printing press is a mechanical device that transfers graphic information in batches onto a substrate, such as paper, plastic, or fabric, through processes such as plate making, inking, and pressurization. It is widely used in publishing, packaging, advertising, and other fields, and is an indispensable piece of equipment in modern industrial production.

[0003] In existing printing presses, paper or plastic film is typically moved to the printing mechanism by a conveyor belt. The printing mechanism then completes the printing process on the paper or plastic film. During the process of transporting the plastic film or paper by the conveyor belt, the paper and plastic film are relatively light and easily affected by external airflow, which can cause the paper or plastic film to shift to a certain extent, thus affecting the printing effect of the printing press. Utility Model Content

[0004] Therefore, the technical problem to be solved by this utility model is to provide a positioning device for a printing press, which can always adsorb and limit the printing material during the process of transporting the printing material on the conveyor belt, so as to avoid the external airflow causing the printing material to shift in position and affect the printing effect of the printing press.

[0005] To solve the above problems, this utility model provides a positioning device for a printing machine, comprising: a housing, in which a conveyor belt is rotatably mounted via a drive mechanism, and the outer wall of the conveyor belt is in contact with the inner wall of the housing; a plurality of suction holes are equally spaced on the conveyor belt; and an air pump is provided inside the conveyor belt and is fixedly connected to the inner wall of the housing.

[0006] Two baffles are symmetrically fixed on the top side of the outer shell. One end of each baffle is equipped with a feeding mechanism for feeding the printing substrate roll, and the other end is equipped with a flow guiding mechanism for guiding the gas flowing into the outer shell and the gas discharged by the air pump.

[0007] The pad is slidably mounted on the top side of the conveyor belt and is fixedly connected to two baffles. A release mechanism is provided below the pad to release the adhesion between the conveyor belt and the substrate.

[0008] Preferably, the feeding mechanism includes two mounting slots, which are respectively opened at one end of two baffles, and a limiting rod is rotatably installed between the two baffles, with the limiting rod located below the mounting slot.

[0009] Preferably, the release mechanism includes a support plate, which is disposed inside the conveyor belt, and the top side of the support plate is in contact with the inner wall of the conveyor belt. The support plate is located directly below the pad, and both ends of the support plate are fixedly inserted through the shell wall of the outer casing.

[0010] Preferably, a second support plate is provided on one side of the conveyor belt near the discharge end of the outer shell, and both ends of the second support plate are fixedly inserted through the shell wall of the outer shell, with the top side of the second support plate in contact with the inner wall of the conveyor belt.

[0011] Preferably, the flow guiding mechanism includes several air inlet pipes, which are fixedly installed inside one of the baffles and the shell wall of the outer casing for communication between the interior of the outer casing and the two baffles. The distance between two adjacent air inlet pipes is equal. A pressure limiting valve is fixedly installed inside the air inlet pipe. A flow divider shell is fixedly installed on the outer wall of the other baffle. A circular hole is opened on the other baffle at the position corresponding to the air inlet pipe, and the interior of the circular hole communicates with the interior of the flow divider shell. The exhaust end of the air pump is connected to the interior of the flow divider shell through a flexible tube.

[0012] Preferably, a filter plate is fixedly installed inside the diversion shell, and the filter plate is fixedly connected to the outer shell, with the filter plate located below the circular hole.

[0013] This utility model has the following beneficial effects:

[0014] When this improved printing press positioning device is in use, the substrate is moved to the desired position by a conveyor belt. At the same time, an air pump generates an adsorption force between the conveyor belt and the substrate to prevent external airflow from causing the substrate to shift position and affecting the printing effect. Meanwhile, a directional airflow is formed on the top side of the substrate to clean the adhering objects on the substrate before printing and to dry the printed pattern on the substrate after printing, resulting in a good printing effect. Attached Figure Description

[0015] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a perspective view of the overall structure of this utility model;

[0017] Figure 2 This is a perspective view of part of the outer shell and part of the conveyor belt of this utility model;

[0018] Figure 3 This is a right view of the internal structure of the outer shell of this utility model;

[0019] Figure 4 This is a front view of the internal structure of part of the outer shell of this utility model.

[0020] The reference numerals in the attached figures are as follows:

[0021] 1. Outer shell; 2. Conveyor belt; 3. Adsorption hole; 4. Air pump; 5. Baffle; 6. Feeding mechanism; 61. Mounting groove; 62. Limiting rod; 7. Release mechanism; 71. Support plate one; 72. Support plate two; 8. Flow guiding mechanism; 81. Air inlet pipe; 82. Pressure limiting valve; 83. Diverter shell; 84. Round hole; 85. Filter plate; 9. Pad plate. Detailed Implementation

[0022] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0023] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0024] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0025] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0026] See also Figure 1 , Figure 2 and Figure 3 As shown, according to an embodiment of the present invention, a positioning device for a printing machine is provided, comprising: a housing 1, in which a conveyor belt 2 is rotatably mounted via a drive mechanism, and the outer wall of the conveyor belt 2 is in contact with the inner wall of the housing 1; a plurality of suction holes 3 are equally spaced on the conveyor belt 2; and an air pump 4 is provided inside the conveyor belt 2, and the air pump 4 is fixedly connected to the inner wall of the housing 1.

[0027] Two baffles 5 are symmetrically fixed on the top side of the outer shell 1. One end of each baffle is provided with a feeding mechanism 6 for feeding the printing substrate roll, and the other end is provided with a guiding mechanism 8 for guiding the gas flowing into the outer shell 1 and the gas discharged by the air pump 4.

[0028] The pad 9 is slidably mounted on the top side of the conveyor belt 2 and is fixedly connected to two baffles 5. A release mechanism 7 is provided below it to release the adhesion between the conveyor belt 2 and the substrate.

[0029] In this embodiment, (please refer to...) Figure 1 and Figure 4 As shown, the driving mechanism includes two driving rollers, which are symmetrically arranged in the conveyor belt 2. Both ends of the driving rollers rotate through the shell wall of the outer casing 1. A driver is fixedly installed on the shell wall of the outer casing 1, and the driving end of the driver is fixedly connected to the corresponding driving roller. The driver mainly consists of the outer casing 1, a motor and a gear transmission structure. When this improved printing press positioning device is used, the driving mechanism drives the conveyor belt 2 to rotate inside the outer casing 1 so as to move the printing substrate along a fixed trajectory.

[0030] As the conveyor belt 2 rotates, the air pump 4 continuously draws gas from the housing 1. Due to the obstruction of the adsorption holes 3 by the substrate and the inner wall of the housing 1, a negative pressure chamber of corresponding strength is formed inside the housing 1, which firmly adsorbs the substrate onto the conveyor belt 2. Subsequently, the gas between the two baffles 5 flows into the housing 1 through the flow guiding mechanism 8 to replenish the gas lost in the housing 1. At the same time, the flow guiding mechanism 8 guides the gas drawn by the air pump 4 back into the space between the two baffles 5, thereby forming a directional airflow at the corresponding positions of the two baffles 5.

[0031] When the substrate moves to the airflow position, the airflow washes the top side of the substrate to clean its surface. When the substrate moves to the pad 9 position, the release mechanism 7 releases the adsorption force between the substrate and the conveyor belt 2. At this time, the substrate slides on the top side of the pad 9. (The pad 9, together with the baffle 5 and the outer shell 1, provides stable support for the substrate. Existing printing devices are installed directly above the pad 9, such as roller printing mechanisms or pressure printing mechanisms.) After the substrate is removed from the pad 9, the adsorption state between the substrate and the conveyor belt 2 will be restored. Then, the substrate moves towards the discharge end of the outer shell 1 and passes through the airflow again. The airflow dries the printed pattern on the substrate. When the substrate moves to the discharge end of the outer shell 1, the release mechanism 7 releases the adsorption state between the substrate and the conveyor belt 2 again, and the substrate is discharged from the discharge end of the outer shell 1.

[0032] In summary, when this improved positioning device for printing press is in use, the substrate is moved to the desired position by the conveyor belt 2. At the same time, the air pump 4 generates an adsorption force between the conveyor belt 2 and the substrate to prevent external airflow from causing the substrate to shift position and affecting the printing effect. Meanwhile, a directional airflow is formed on the top side of the substrate to clean the adhering substances on the substrate before printing and to dry the printed pattern on the substrate after printing. The printing effect of the printing press is good.

[0033] In a further preferred embodiment of this utility model, such as Figure 1 and Figure 4 As shown, the feeding mechanism 6 includes two mounting slots 61, which are respectively opened at one end of two baffles 5. A limiting rod 62 is rotatably installed between the two baffles 5, and the limiting rod 62 is located below the mounting slot 61.

[0034] In this embodiment, please refer to Figure 1 and Figure 4 As shown, when feeding the substrate roll, the substrate roll is directly inserted between the two baffles 5, and the rotating shaft of the substrate is inserted into the two mounting slots 61. Due to the mutual contact between the rotating shaft and the inner wall of the mounting slot 61, the substrate roll is always located in the corresponding position between the two baffles 5. At the same time, due to the constraint and limitation of the two ends of the substrate and the two baffles 5, the substrate is always located in the corresponding position between the two baffles 5.

[0035] Then pull the end of the substrate and move it around the limiting rod 62, so that the substrate is spread on the conveyor belt 2;

[0036] Before the driver drives the conveyor belt 2 to rotate, the air pump 4 starts first, thereby adsorbing the substrate onto the conveyor belt 2 through the adsorption holes 3.

[0037] In a further preferred embodiment of this utility model, such as Figure 1 , Figure 2 and Figure 4 As shown, the release mechanism 7 includes a support plate 71, which is located inside the conveyor belt 2, and the top side of the support plate 71 is in contact with the inner wall of the conveyor belt 2. The support plate 71 is located directly below the pad 9, and both ends of the support plate 71 are fixedly inserted through the shell wall of the outer shell 1.

[0038] In this embodiment, please refer to Figure 1 , Figure 2 and Figure 4 As shown, when the substrate moves to the support plate 71, the outside gas flows into the adsorption hole 3 through the inner hole of the support plate 71, thereby relieving the negative pressure state in the adsorption hole 3, and thus relieving the adsorption force between the substrate and the conveyor belt 2. This prevents the substrate from being deformed when it moves to the pad 9 due to the adsorption of the substrate by the adsorption hole 3, which would affect the printing of the substrate.

[0039] After the substrate is removed from the pad 9 and the support plate 71 moves upward and opens, the support plate 71 stops blocking the adsorption hole 3, and the adsorption hole 3 reconnects with the inside of the outer shell 1. Some of the gas in the adsorption hole 3 flows into the outer shell 1, thereby restoring the adsorption state between the substrate and the conveyor belt 2. The adsorption and positioning state of the substrate is good.

[0040] In a further preferred embodiment of this utility model, such as Figure 2 and Figure 4 As shown, a support plate 2 72 is provided on one side of the conveyor belt 2 near the discharge end of the outer shell 1, and both ends of the support plate 2 72 are fixedly inserted through the shell wall of the outer shell 1, and the top side of the support plate 2 72 is in contact with the inner wall of the conveyor belt 2.

[0041] In this embodiment, please refer to Figure 2 and Figure 4 As shown, when the substrate moves to the top side of the support plate 2 72, the outside gas flows into the adsorption hole 3 through the inner hole of the support plate 2 72, thereby relieving the negative pressure state in the adsorption hole 3, and thus relieving the adsorption force between the substrate and the conveyor belt 2, so that the substrate can be directly separated from the conveyor belt 2 and directly moved to the top side of the outer shell 1, so that the rotation of the conveyor belt 2 can directly push the substrate onto the outer shell 1.

[0042] In a further preferred embodiment of this utility model, such as Figure 1 and Figure 3As shown, the flow guiding mechanism 8 includes several air inlet pipes 81, which are fixedly installed inside one of the baffles 5 and the shell wall of the outer casing 1 for communication between the interior of the outer casing 1 and the two baffles 5. The distance between two adjacent air inlet pipes 81 is equal. A pressure limiting valve 82 is fixedly installed inside the air inlet pipe 81. A flow divider shell 83 is fixedly installed on the outer wall of the other baffle 5. A circular hole 84 is opened on the other baffle 5 at the position corresponding to the air inlet pipe 81, and the interior of the circular hole 84 communicates with the interior of the flow divider shell 83. The exhaust end of the air pump 4 is connected to the interior of the flow divider shell 83 through a soft tube.

[0043] In this embodiment, please refer to Figure 1 and Figure 3 As shown, after a negative pressure chamber of corresponding strength is formed in the conveyor belt 2 and the outer shell 1, a pressure difference of corresponding strength is generated at both ends of the air inlet pipe 81. At this time, the gas between the two baffles 5 flows into the conveyor belt 2 through the conduit and the pressure limiting valve 82 to avoid the formation of a negative pressure chamber of high strength in the conveyor belt 2, which would cause the conveyor belt 2 to bend or cause the adsorption force of the adsorption hole 3 on the substrate to be too large, resulting in deformation and damage to the substrate.

[0044] The gas drawn by the air pump 4 is directly discharged into the flow divider housing 83 and then discharged through several round holes 84. Since the round holes 84 are opposite to the air inlet pipe 81, most of the gas flowing out from the round holes 84 flows directly towards the air inlet pipe 81 and into the air inlet pipe 81, thus continuously forming a directional airflow at the corresponding position between the two baffles 5.

[0045] In a further preferred embodiment of this utility model, such as Figure 1 and Figure 3 As shown, a filter plate 85 is fixedly installed inside the flow divider shell 83, and the filter plate 85 is fixedly connected to the outer shell 1. The filter plate 85 is located below the circular hole 84.

[0046] In this embodiment, (the connection between the diverter housing 83 and the outer shell 1 is completed using existing detachable connection methods, such as bolts or clips), please refer to... Figure 1 and Figure 3 As shown, the gas injected into the diversion shell 83 is filtered by the filter plate 85 between the inflow holes 84, thereby greatly reducing the dust content in the gas flowing between the two baffles 5 and enhancing the cleaning effect of the substrate.

[0047] Working principle: When the positioning device of this improved printing press is in use, the substrate is driven to move along a fixed trajectory by the conveyor belt 2, thereby moving the substrate to the corresponding position to complete the printing operation on the substrate;

[0048] During the rotation of the conveyor belt 2, the air pump 4 and the adsorption hole 3 work together to firmly adsorb the substrate onto the conveyor belt 2, so as to always keep the substrate adsorbed and positioned during the movement or printing process.

[0049] During the printing process, the surface of the substrate is cleaned by airflow, and after the printing is completed, the printed pattern on the substrate is dried by airflow.

[0050] It will be readily understood by those skilled in the art that the aforementioned advantageous methods can be freely combined and superimposed without conflict.

[0051] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model. The above are only preferred embodiments of this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of this utility model, and these improvements and modifications should also be considered within the protection scope of this utility model.

Claims

1. A positioning device for a printing press, characterized in that, include: The outer shell (1) has a conveyor belt (2) installed inside by a drive mechanism, and the outer wall of the conveyor belt (2) is in contact with the inner wall of the outer shell (1). The conveyor belt (2) has several adsorption holes (3) at equal intervals. The conveyor belt (2) is equipped with an air pump (4), and the air pump (4) is fixedly connected to the inner wall of the outer shell (1). Two baffles (5) are symmetrically fixed on the top side of the outer shell (1). One end of the baffles is provided with a feeding mechanism (6) for feeding the printing roll, and the other end of the baffles is provided with a guiding mechanism (8) for guiding the gas flowing into the outer shell (1) and the gas discharged by the air pump (4). A pad (9) is slidably mounted on the top side of the conveyor belt (2), and the pad (9) is fixedly connected to two baffles (5). A release mechanism (7) is provided below it to release the adsorption state between the conveyor belt (2) and the substrate.

2. The positioning device for a printing press according to claim 1, characterized in that: The feeding mechanism (6) includes two mounting slots (61), which are respectively opened at one end of two baffles (5). A limiting rod (62) is rotatably installed between the two baffles (5), and the limiting rod (62) is located below the mounting slot (61).

3. A positioning device for a printing press according to claim 2, characterized in that: The release mechanism (7) includes a support plate (71) located inside the conveyor belt (2), with the top side of the support plate (71) in contact with the inner wall of the conveyor belt (2). The support plate (71) is located directly below the pad (9), and both ends of the support plate (71) are fixedly inserted through the shell wall of the outer shell (1).

4. A positioning device for a printing press according to claim 3, characterized in that: A second support plate (72) is provided on one side of the conveyor belt (2) near the discharge end of the outer shell (1), and both ends of the second support plate (72) are fixedly inserted through the shell wall of the outer shell (1). The top side of the second support plate (72) is in contact with the inner wall of the conveyor belt (2).

5. A positioning device for a printing press according to claim 4, characterized in that: The flow guiding mechanism (8) includes several air inlet pipes (81), which are fixedly installed inside one of the baffles (5) and the shell wall of the outer shell (1) for communication between the inside of the outer shell (1) and the two baffles (5). The distance between two adjacent air inlet pipes (81) is equal. A pressure limiting valve (82) is fixedly installed inside the air inlet pipe (81). A flow divider shell (83) is fixedly installed on the outer wall of the other baffle (5). A round hole (84) is opened on the other baffle (5) at the position corresponding to the air inlet pipe (81), and the inside of the round hole (84) is connected to the inside of the flow divider shell (83). The exhaust end of the air pump (4) is connected to the inside of the flow divider shell (83) through a soft tube.

6. A positioning device for a printing press according to claim 5, characterized in that: A filter plate (85) is fixedly installed inside the diversion shell (83), and the filter plate (85) is fixedly connected to the outer shell (1). The filter plate (85) is located below the round hole (84).

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