Positioning printing device capable of reducing consumption of base material

Abstract

The utility model provides a positioning printing device capable of reducing the consumption of a base material, and the base material is provided with a mark. Comprising an unwinding unit used for outputting a base material, a first detection device used for detecting a base material mark, a printing unit used for printing the base material, a tensioning degree compensation device capable of tensioning or preventing the base material from loosening, and a second detection device used for detecting the base material mark which are sequentially arranged in the feeding direction. The device further comprises a control unit which is electrically connected with the first detection device, the second detection device and the tensity compensation device and further can control the tensity compensation device to tension or loosen the base material according to detection results of the first detection device and the second detection device. The utility model provides a positioning printing device which reduces consumption of base materials, improves efficiency and improves product quality.

Description

Technical Field

[0001] The utility model specifically relates to a positioning printing device capable of reducing substrate consumption. Background Art

[0002] Generally, a traditional printing device is provided with a printing unit, and each printing unit has a plate roller. The plate roller directly or indirectly prints a pattern on a substrate such as paper, cloth, or plastic film. The substrate passes through multiple conveying rollers, traction rollers, printing rollers, etc. in the feeding direction. Reference may be made to patent number CN201921780696.9, a patent scheme for an online film stripping and gluing printing device. When the substrate is conveyed, pulled, and printed, a position error of the substrate in the feeding direction is inevitable, which will cause the pattern or color printed on the substrate to be inaccurate. In particular, a printing device is usually provided with multiple printing units. Such a position error of the substrate will cause the position of each print to not correspond, seriously affecting the printing quality. Usually, the operator is required to manually adjust the various drive rollers of the device. This process is commonly known as plate registration. However, this startup and debugging requires a lot of manpower and time, wasting manpower and material resources, and poor plate registration accuracy will lead to a large amount of material waste.

[0003] The utility model is produced based on the above-mentioned shortcomings. Utility Model Content

[0004] The utility model aims to overcome the shortcomings of the prior art and provide a positioning printing device which can reduce substrate consumption, thereby improving efficiency and product quality.

[0005] The utility model is realized by the following technical solutions:

[0006] A positioning printing device for reducing substrate consumption, wherein the substrate is provided with a mark, comprising an unwinding unit for outputting the substrate, a first detection device for detecting the substrate mark, a printing unit for printing the substrate, a tension compensation device capable of tightening or preventing the substrate from loosening, and a second detection device for detecting the substrate mark, and also comprising a control unit electrically connected to the first detection device, the second detection device and the tension compensation device, thereby being able to control the tension compensation device to tighten or prevent the substrate from loosening through the detection results of the first detection device and the second detection device.

[0007] In the positioning printing device for reducing substrate consumption as described above, the tension compensation device includes a compensation roller for the substrate to be wound around and a servo motor for driving the compensation roller to move.

[0008] In the positioning printing device for reducing substrate consumption as described above, at least two unwinding units are provided, and a laminating device for laminating the substrate output by the unwinding unit is also provided between the unwinding unit and the printing unit.

[0009] In the positioning printing device for reducing substrate consumption as described above, a first drying unit is further provided between the laminating device and the printing unit.

[0010] In the positioning printing device for reducing substrate consumption as described above, a material storage unit is further provided between the laminating device and the printing unit.

[0011] The positioning printing device for reducing substrate consumption as described above further includes an auxiliary traction device arranged on the discharge side of the second detection device.

[0012] The positioning printing device for reducing substrate consumption as described above further includes a second drying unit disposed on the discharge side of the second detection device.

[0013] In the positioning printing device for reducing substrate consumption as described above, the first detection device and the second detection device both use photoelectric sensors.

[0014] In the positioning printing device for reducing substrate consumption as described above, the servo motor is connected to the compensation roller via a ball screw structure.

[0015] Compared with the prior art, the utility model has the following advantages:

[0016] The positioning printing device of the utility model can eliminate the substrate position deviation between the substrate before and after printing to the greatest extent, thereby reducing the material waste caused by printing deviation. At the same time, it compensates for the material error caused by printing through automatic control, avoids the subsequent printing and the previous printing pattern to have a large deviation, improves the product quality, automatically adjusts, reduces the workload of manual adjustment, and improves production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of the positioning printing device of the utility model;

[0018] Figure 2 It is a simplified schematic diagram of the positioning printing device of the utility model;

[0019] Figure 3 The utility model is a schematic diagram of the electric control principle of the scope tube of the gastroenteroscopy. DETAILED DESCRIPTION

[0020] The utility model is further described below in conjunction with the accompanying drawings:

[0021] The directions described in the utility model specification, such as "up", "down", "left", "right", "front", "back", etc., are based on the directions of the drawings and are intended to facilitate the description of the relationship between the various components. They do not indicate the unique or absolute positional relationship between the various components. They are only one of the implementation methods of the utility model and are not a limitation on its implementation method.

[0022] This embodiment provides a positioning printing device with reduced substrate consumption, which is mainly used for printing substrates such as paper, cloth, and plastic film. The reference patent number is CN201920227917.3, a patent scheme for a thin film coating composite system. This scheme is mainly used for printing thin films. A cursor for detection by the device is pre-set on the film. The cursor can be set on the film as a separate part, or it can be printed on the film as part of a pattern. Of course, there is a mark on the substrate, and substrates such as paper and cloth are also provided with marks such as this cursor.

[0023] like Figure 1 and Figure 2As shown, the positioning printing device includes an unwinding unit 1 for outputting a substrate, a first detection device 2 for detecting a substrate mark, a printing unit 3 for printing a substrate, a tension compensation device 4 capable of tightening or preventing the substrate from loosening, and a second detection device 5 for detecting a substrate mark, and also includes a control unit 6 electrically connected to the first detection device 2, the second detection device 5 and the tension compensation device 4, and then capable of controlling the tension compensation device 4 to tighten or prevent the substrate from loosening according to the detection results of the first detection device 2 and the second detection device 5, wherein the unwinding unit is a key component of the roll material printing equipment, mainly used to carry and release raw materials wound into a roll, such as paper, film, cloth, foil or other similar printing substrates. The main functions of this device include: supporting and releasing the roll, which is responsible for fixing and stably releasing the substrate on the roll, so that the material can smoothly and continuously enter the subsequent printing, coating or processing links; tension control, it is very important to accurately control the tension in the material release process to ensure that the material will not be too tight and break when running at high speed, nor too loose and cause inaccurate movement. The unwinding unit is usually equipped with a tension detection and control system to maintain constant tension; Positioning and correction: Some unwinding devices also integrate a correction system that can automatically correct the lateral position of the substrate during travel to ensure that it passes through the printing unit accurately along the preset center line. Among them, the printing unit 3 can adopt the printing unit in the patent scheme of a pre-curing solvent-free laminating machine with patent number CN201710024385.9. The printing unit refers to the core part that completes the transfer of graphics and is the key mechanical structure on the printing machine to achieve the replication of graphics from the printing plate to the substrate. Specifically, each printing unit usually includes the following main parts: the plate cylinder, which is equipped with the pre-processed printing plate, and the printing plate carries the image to be printed; the rubber cloth cylinder, during the offset printing process, the rubber cloth cylinder is covered with a special rubber cloth, which is used to receive the ink image on the plate cylinder and transfer it evenly to the substrate; in some printing methods that do not require rubber cloth transfer, it may be directly transferred from the plate cylinder to the substrate; the impression cylinder, which is in contact with the rubber cloth cylinder or cooperates with the direct image transfer cylinder, clamps the passing substrate between the two, and completes the transfer of the image under pressure; the ink path system, including ink fountains, ink keys, ink rollers and other components, is responsible for supplying an appropriate amount of evenly distributed ink to the printing plate.Among them, the first detection device 2 and the second detection device 5 mainly use photoelectric eyes, that is, photoelectric sensors or photoelectric switches, which are electronic devices that work on the principle of photoelectric effect. They usually include a light source and a photosensitive element, and are mainly used to detect the existence, position, moving direction, color, transparency and other characteristics of an object. The principle is that the light emitter emits a beam of light, which is directly transmitted to the corresponding light receiver without obstruction. When an object passes through the detection area, the light beam may be blocked, reflected or transmitted by the object, resulting in a change in the light intensity received by the light receiver, that is, the photoelectric eye senses the corresponding cursor through the mark on the substrate, thereby confirming the different positions of the substrate. Among them, the control unit 6 uses a general PLC programmable circuit or a microcomputer. Among them, the tension compensation device 4 can adopt the tensioning roller and cylinder in the patent scheme of the tension compensation mechanism of the satellite full-rotary printing press with patent number CN201310485724.5. In the present embodiment, the tension compensation device 4 includes a compensation rod 41 for the substrate to be wound around and a servo motor 42 for driving the compensation rod 41 to move. The servo motor is used instead of the cylinder. Of course, the cylinder can also be used. As a preference, the servo motor 42 described in the present embodiment is connected to the compensation rod 41 through a ball screw structure, that is, the output shaft of the servo motor 42 is connected to the ball screw, and the ball screw is screwed with a ball slide, and the ball slide is connected to the compensation rod 41. When the device is working, when the substrate passes through the first detection device 2, it can detect the identification of the substrate at that position, determine the position of the substrate, and transmit the information to the control unit 6. Thereafter, the substrate passes through the printing unit 3 for printing. After printing, the substrate is prone to material position deviation. At this time, the tension of the substrate is adjusted by the tension compensation device 4. Specifically, the servo motor 42 drives the compensation roller 41 to move linearly, thereby tightening or loosening the substrate. However, at this time, the system cannot know the material position of the printed substrate. In this way, the material position of the substrate after printing is detected by the second detection device 5, and the information is transmitted to the control unit 6. The control unit 6 controls the action of the tension compensation device 4 by calculating the deviation between the position information of the substrate detected by the first detection device 2 and the second detection device 5. Specifically, a preset deviation value L0 is stored in the control unit 6 in advance, and the difference between the actual deviation value L1 detected and the preset deviation value L0 is calculated. The positive or negative value of the difference determines the distance that the servo motor 42 drives the compensation roller 41 to move. The above structure can eliminate the substrate position deviation between before and after printing to the greatest extent, thereby reducing material waste caused by printing deviation. At the same time, automatic control can be used to compensate for material errors caused by printing, thereby avoiding large deviations between subsequent printing and the previous printing pattern, improving product quality, automatically adjusting, reducing the workload of manual adjustment, and improving production efficiency.

[0024] As a preferred solution of this embodiment, Figure 1and Figure 2 As shown, the unwinding unit 1 is provided with at least two, and a pressing device 7 for pressing the substrate output by the unwinding unit 1 is also provided between the unwinding unit 1 and the printing unit 3, wherein the pressing device 7 can adopt the patent scheme of CN202222178464.4, a pressing device for printing printed products, which generally refers to a mechanical device that can bond the printed film with other materials by hot pressing or cold pressing. This process may be for the purpose of packaging, laminating, coating or making composite materials. Specifically, it includes some functional components, such as the heating system. For processes that require hot melt glue or other heat-sensitive adhesives, the laminating device will be equipped with a heating device, such as an electric heating plate or an infrared heater, to heat the adhesive layer to a molten state, thereby achieving a strong bond; the pressure system, which applies appropriate pressure through hydraulic, pneumatic or mechanical pressure mechanisms to ensure that the film and other materials fit tightly during the bonding process without bubbles or wrinkles; the positioning device, which accurately aligns the position of the film and other materials to ensure that the pattern or text is accurately superimposed; the transmission system, which delivers the film and substrate to be laminated into the laminating area and delivers it out after the lamination is completed. This process often includes steps such as unwinding, positioning, laminating, cooling and winding.

[0025] As a preferred solution of this embodiment, Figure 1 and Figure 2 As shown, a first drying unit 8 is further provided between the laminating device 7 and the printing unit 3 to improve the drying efficiency after the laminating device 7 laminarizes the substrate.

[0026] As a preferred solution of this embodiment, Figure 1 and Figure 2 As shown, a material storage unit 9 is further provided between the laminating device 7 and the printing unit 3. The material storage unit 9 is provided with a plurality of conveying rollers, so that the substrate can be reciprocated around each conveying roller, thereby achieving the purpose of storing more substrates.

[0027] As a preferred solution of this embodiment, Figure 1 and Figure 2 As shown, an auxiliary traction device 10 is also included which is arranged on the discharge side of the second detection device 5 .

[0028] As a preferred solution of this embodiment, Figure 1 and Figure 2 As shown, a second drying unit 11 is also included, which is arranged on the discharge side of the second detection device 5 .

[0029] The above is only an embodiment of the utility model, and the common knowledge such as the known specific structure and characteristics in the scheme is not described in detail here. It should be pointed out that for those skilled in the art, several deformations and improvements can be made without departing from the structure of the utility model, which should also be regarded as the protection scope of the utility model, and these will not affect the effect of the implementation of the utility model and the practicality of the patent. The scope of protection required by this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to interpret the content of the claims.

Claims

1. A positioning printing device for reducing substrate consumption, wherein the substrate is provided with a mark, characterized in that: The invention comprises an unwinding unit (1) for outputting a substrate, a first detection device (2) for detecting a substrate mark, a printing unit (3) for printing the substrate, a tension compensation device (4) capable of tightening or preventing the substrate from loosening, and a second detection device (5) for detecting the substrate mark, which are arranged in sequence along the feeding direction, and also comprises a control unit (6) which is electrically connected to the first detection device (2), the second detection device (5) and the tension compensation device (4) and can control the tension compensation device (4) to tighten or prevent the substrate from loosening according to the detection results of the first detection device (2) and the second detection device (5).

2. The positioning printing device for reducing substrate consumption according to claim 1, characterized in that: The tension compensation device (4) comprises a compensation roller (41) around which the substrate is wound and a servo motor (42) for driving the compensation roller (41) to move.

3. The positioning printing device for reducing substrate consumption according to claim 1, characterized in that: At least two unwinding units (1) are provided, and a laminating device (7) for laminating the substrate output by the unwinding unit (1) is also provided between the unwinding unit (1) and the printing unit (3).

4. The positioning printing device for reducing substrate consumption according to claim 3, characterized in that: A first drying unit (8) is also provided between the laminating device (7) and the printing unit (3).

5. The positioning printing device for reducing substrate consumption according to claim 4, characterized in that: A material storage unit (9) is also provided between the laminating device (7) and the printing unit (3).

6. The positioning printing device for reducing substrate consumption according to claim 5, characterized in that: It also includes an auxiliary traction device (10) arranged on the discharge side of the second detection device (5).

7. The positioning printing device for reducing substrate consumption according to claim 5, characterized in that: It also includes a second drying unit (11) arranged on the discharge side of the second detection device (5).

8. The positioning printing device for reducing substrate consumption according to claim 1, characterized in that: The first detection device (2) and the second detection device (5) both use photoelectric sensors.

9. The positioning printing device for reducing substrate consumption according to claim 2, characterized in that: The servo motor (42) is connected to the compensation rod (41) via a ball screw structure.

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