Offset printing water feeding device system for green printing

Abstract

The utility model discloses an offset printing water feeding device system for green printing, which comprises a five-roller water feeding device body arranged on a printing machine frame body, an ink scraping assembly is arranged on the left lower side of an ink middle roller of the five-roller water feeding device body, and a scraper head of the ink scraping assembly is contacted with the circumferential surface of the ink middle roller. The ink scraping assembly is additionally arranged on the left side of the ink middle roller of the five-roller water feeding device, reverse-sticking ink on the ink middle roller is scraped off through the scraper, the situation that fountain solution is dirty due to the fact that the ink middle roller transfers the reverse-sticking ink into a water tank is avoided, and therefore the production quality of books is guaranteed, and the production efficiency is improved. The fountain solution loss and the enterprise production cost in the production process are reduced, and meanwhile the production efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of printing equipment, in particular to an offset printing water supply device system for green printing. Background Art

[0002] The amount of water supplied to the water supply system of a printing press has an important influence on the printing quality. The amount of water supplied is directly related to the supply of fountain solution during the printing process, thus affecting the stability and performance of the printing quality. When the water content is too high, the printed product will appear white, and the so-called "water marks" will appear on the solid part, making the print weak and the ink color uneven. At the same time, the deformation of the paper will increase, the image and text will not be accurately overprinted, and the roller pad will be wet or the roller shell will be rusted. When the water content is too low, ink stains will first appear in the blank part of the printed product, causing dirty plates. As the printing time increases, the ink gradually blocks the non-inked parts, resulting in "muddy plates", and the light shading of the dot area above the solid is gradually blocked by the ink.

[0003] The existing offset printing press water supply system components mostly use water roller contact water supply. After a period of printing, the fountain solution in the water tank gradually becomes dirty due to problems such as ink sticking to the ink intermediate roller, which can easily cause printing quality problems. It is necessary to regularly replace the fountain solution and add a filtration system, resulting in excessive loss of the fountain solution. Non-contact water supply methods, such as spray water supply, can keep the fountain solution clean and reduce the loss of the fountain solution, but the spray water supply system is relatively complex and requires more equipment and control systems.

[0004] Therefore, it is urgent to develop a water supply system with a simple device system, convenient operation, and the ability to effectively reduce the contamination of the fountain solution, reduce losses and ensure production quality to solve this problem. Summary of the invention

[0005] The utility model aims to provide a green printing offset watering device system, by adding an ink scraping device to the ink intermediate roller, the ink sticking on the ink intermediate roller is scraped off by the scraper to avoid the contamination of the fountain solution caused by the ink being transferred to the water tank, so as to ensure the production quality of books and reduce production losses and enterprise production costs.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] A green printing offset water supply device system comprises a five-roller water supply device body mounted on a printing machine frame, an ink scraping assembly is mounted on the lower left side of an ink intermediate roller of the five-roller water supply device body, and a scraper head of the ink scraping assembly contacts the circumferential surface of the ink intermediate roller.

[0008] Furthermore, the ink scraper assembly also includes a collecting trough, which is rotatably mounted on the printing machine frame through shaft heads arranged at both ends thereof, a guide port is arranged at one end of the collecting trough, and the scraper is fixed on one side of the collecting trough.

[0009] Furthermore, the inner bottom of the collecting tank is designed to be in an inclined state, specifically, the side close to the guide port is lower than the side away from the guide port.

[0010] Furthermore, the diversion port is connected to the liquid accumulation barrel through a diversion pipe.

[0011] Furthermore, the scraper is made of a hard polymer sheet, and the scraper head is in an arc shape.

[0012] The beneficial effects of the utility model are:

[0013] The utility model adds an ink scraping assembly to the left side of the ink middle roller of the five-roller water supply device, and scrapes off the anti-sticky ink on the ink middle roller through the scraper, so as to prevent the ink middle roller from transferring the anti-sticky ink to the water tank and causing the fountain solution to be contaminated, thereby ensuring the quality of book production, reducing the fountain solution loss and enterprise production costs in the production process, and improving production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the installation of the water supply system of the utility model on a printing press;

[0015] Figure 2 This is a schematic diagram of the side effect of the ink scraping assembly of the utility model;

[0016] Figure 3 This is a schematic diagram of the cross-sectional structure of the ink scraping assembly of the utility model in the AA direction;

[0017] Figure 4 It is a schematic diagram of the cross-sectional structure of the ink scraping assembly of the utility model along the BB axis.

[0018] In the figure:

[0019] 1. Five-roller water supply device body, 11. Water tank roller, 12. Measuring roller, 13. Water distribution roller, 14. Plate forming roller, 15. Ink intermediate roller;

[0020] 2. ink scraping assembly, 21. collecting tank, 22. scraper, 23. guide port, 24. shaft head, 241. first shaft head, 242. second shaft head;

[0021] 3. Plate roller, 4. Ink roller, 5. Water tank. DETAILED DESCRIPTION

[0022] In order to make the technical problems solved by the present invention, the technical solutions adopted and the technical effects achieved clearer, the technical solutions of the present invention are further described below in conjunction with the accompanying drawings and through specific implementation methods. It is understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for the convenience of description, only the parts related to the present invention are shown in the accompanying drawings, rather than all of them.

[0023] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0024] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0025] In the description of this embodiment, the terms "upper", "lower", "right", etc., are based on the directions or positions shown in the drawings, and are only for the convenience of description and simplified operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0026] The technical solution of the utility model is further explained below with reference to the accompanying drawings and through specific implementation methods.

[0027] like Figure 1-Figure 4As shown, the practical embodiment provides a technical solution: a green offset printing water supply device system, including a five-roller water supply device body 1 installed on a printing machine frame, and an ink scraping assembly 3 is installed on the lower left side of the ink intermediate roller 15 of the five-roller water supply device body 1, and the scraper 22 head of the ink scraping assembly 3 is in contact with the circumferential surface of the ink intermediate roller 15. The five-roller water supply device body 1 used in production also includes a water trough roller 11, a metering roller 12, a water distribution roller 13 and a plate forming roller 14, wherein the water trough roller 11 is in direct contact with the dampening solution in the water trough 5 installed on the printing machine frame, and the water trough 5 is located below the water trough roller 11. The respective positions of the water trough roller 11, the metering roller 12, the water distribution roller 13, the plate forming roller 14 and the ink intermediate roller 15 are shown as follows: Figure 1 shown.

[0028] The ink scraping assembly 2 also includes a collecting tank 21, and the collecting tank 21 is rotatably mounted on the printing machine frame through shaft heads 24 arranged at both ends thereof. A guide port 23 is arranged at one end of the collecting tank 21, and the scraper 22 is fixed on one side of the collecting tank 21. The shaft head 24 includes a first shaft head 241 and a second shaft head 242, wherein the first shaft head 241 is fixed on a fixed block (not shown in the figure) of the printing machine frame, so that the entire ink scraping assembly 2 can rotate around the first shaft head 241, and the second shaft head 242 is fixed on a telescopic cylinder (not shown in the figure) used to realize clutch and pressure regulation. The telescopic cylinder is shown in the figure, and the other end of the telescopic cylinder is fixed on the printing press frame and electrically connected to the printing press operation control system. When the printing press is started, the telescopic cylinder contracts and drives the ink scraping assembly 2 to approach the ink intermediate roller 15 so that the head of the scraper 22 fits on the ink intermediate roller 15, and the ink stuck from the inking roller 4 to the ink intermediate roller 15 is scraped off. When the printing is stopped, the telescopic cylinder extends and drives the ink scraping assembly 2 away from the ink intermediate roller 15 so that the head of the scraper 22 is separated from the ink intermediate roller 15, so as to avoid the printing press not being started for a long time and the head of the scraper 22 leaving an indentation on the ink intermediate roller 15.

[0029] Since the ink scraping assembly 2 is installed between multiple rollers such as the plate roller 4 and the plate forming roller 14, a diversion port 23 is set at one end of the collecting tank 21 to facilitate the drainage of the waste liquid scraped by the scraper 22. It only needs regular maintenance and cleaning. In order to ensure that the collected waste liquid flows out smoothly from the diversion port 23, the inner bottom of the collecting tank 21 is designed to be inclined, specifically, the side close to the diversion port 23 is lower than the side away from the diversion port 23. The diversion port 23 is connected to the liquid accumulation bucket (not shown in the figure) through a diversion pipe (not shown in the figure), and the liquid accumulation bucket can be cleaned regularly.

[0030] The scraper 22 is made of a hard polymer sheet, and the head of the scraper 22 is in an arc shape, which reduces the wear of the scraper 22 on the ink intermediate roller 15.

[0031] The above embodiments are only to illustrate the basic principles and characteristics of the present invention. The present invention is not limited by the above embodiments. Without departing from the spirit and scope of the present invention, the present invention may be subject to various changes and modifications, which are within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A green printing offset water supply system, characterized in that: The invention comprises a five-roller water supply device body installed on a printing machine frame, an ink scraping assembly is installed on the lower left side of the ink intermediate roller of the five-roller water supply device body, and the scraper head of the ink scraping assembly contacts the circumferential surface of the ink intermediate roller; the ink scraping assembly also comprises a collecting trough, and the collecting trough is rotatably installed on the printing machine frame through shaft heads arranged at both ends thereof, the inner bottom of the collecting trough is designed to be in an inclined state, and a guide port is arranged at the lower end of the inner bottom of the collecting trough, and the guide port is connected to the liquid accumulation barrel through a guide pipe, and the scraper is fixed on one side of the collecting trough.

2. The green printing offset water supply system according to claim 1, characterized in that: The scraper is made of a hard polymer sheet, and the scraper head is in an arc shape.

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