Rubber cylinder automatic cleaning type offset press for packaging products

Abstract

The utility model relates to the technical field of offset presses, in particular to a blanket cylinder automatic cleaning type offset press for packaging products, which comprises an offset press main body, an impression cylinder and a plate cylinder are rotatably connected onto the offset press main body, and the offset press main body is further provided with a rubber cylinder capable of contacting with the plate cylinder. A cleaning system capable of cleaning paper scraps on the plate cylinder and the rubber cylinder is further arranged on the offset press body, the cleaning system comprises supporting frames fixed to the two sides of the offset press body, and the cleaning system further comprises a cleaner capable of moving in the length direction of the plate cylinder and the rubber cylinder in a reciprocating mode. The cleaning system is used for cleaning paper scraps and dust, the dust and the paper scraps are loosened through water spraying, the paper scraps are scraped off through the cleaning roller, and then water on the plate cylinder and the rubber cylinder is absorbed through the water absorption assembly.

Description

Technical Field

[0001] The utility model relates to the technical field of offset printing machines, in particular to an offset printing machine for packaging products with an automatic cleaning rubber roller. Background Art

[0002] In the printing process of packaging products, offset printing presses, as an efficient and precise printing equipment, are widely used in the printing of various packaging materials. However, with the continuous advancement of printing technology and the increasing requirements for printing quality, a significant challenge faced by offset printing presses in the printing process is the cleaning of the rubber cylinder. The rubber cylinder is one of the core components of the offset printing press, which is responsible for transferring ink from the printing plate to the substrate. During the printing process, the surface of the rubber cylinder will inevitably be contaminated with dirt such as ink, paper coating particles, and plant fibers. If these dirt are not removed in time, it will not only affect the printing quality, resulting in uneven color and blurred images in the printed products, but also shorten the service life of the rubber cylinder and increase maintenance costs.

[0003] Manual cleaning requires stopping the machine, which reduces equipment utilization. Especially in high-speed, continuous production packaging printing scenarios, stopping the machine for cleaning causes significant capacity loss. Manual wiping is difficult to remove fine ink residues, paper scraps, and dust adsorbed by static electricity on the surface of the rubber cylinder, which can easily cause printing defects such as ghosting and ink spots, affecting the visual effect and commodity value of the packaging products. Utility Model Content

[0004] The utility model aims to provide an offset printing machine for packaging products with an automatic rubber roller cleaning type, which cleans paper scraps and dust by adopting a cleaning system, loosens the dust and paper scraps by spraying water, scrapes off the paper scraps by a cleaning roller, and then absorbs the moisture on the plate roller and the rubber roller by a water absorption component.

[0005] In order to solve the problems of the prior art, the utility model provides an offset printing machine for packaging products with automatic rubber roller cleaning, comprising an offset printing machine main body, on which an impression roller and a printing plate roller are rotatably connected, the offset printing machine main body is also provided with a rubber roller capable of contacting the printing plate roller, the offset printing machine main body is also provided with a cleaning system capable of cleaning paper scraps on the printing plate roller and the rubber roller, the cleaning system comprises support frames fixed on both sides of the offset printing machine main body, the cleaning system also comprises a cleaner capable of reciprocating along the length direction of the printing plate roller and the rubber roller, the cleaning system also comprises a reciprocating mechanism arranged between the support frames and capable of driving the cleaner to reciprocate, the cleaning system comprises a spray assembly capable of spraying water onto the printing plate roller and the rubber roller, and a water absorbing assembly for absorbing water on the printing plate roller and the rubber roller is also provided on one side of the cleaner.

[0006] Preferably, the cleaner includes a moving part arranged on a reciprocating mechanism, and the moving part is also provided with a cleaning roller respectively in contact with the plate cylinder and the rubber cylinder. A second rotating driving part is fixed on the side of the cleaner away from the water absorption component, and the output end of the second rotating driving part is connected to the cleaning roller. When the cleaning roller rotates, it can remove paper scraps on the plate cylinder and the rubber roller.

[0007] Preferably, the spray assembly includes a waste liquid collection box arranged in the offset printing machine body, the spray assembly also includes a temporary storage box fixed on the cleaner, the temporary storage box is connected to a nozzle capable of spraying water onto the plate cylinder and the rubber cylinder, and the spray assembly also includes a pump body installed on the outside of the offset printing machine body and pumping water in the waste liquid collection tank into the temporary storage box.

[0008] Preferably, the spray assembly further comprises a filter installed on the side of the offset printing machine body and filtering water, and the filter, the waste liquid collection box and the pump body are connected by a pipeline.

[0009] Preferably, the water absorbing component includes water absorbing cotton that can be close to the printing plate cylinder and the rubber cylinder, and can absorb moisture from the printing plate cylinder and the rubber cylinder when the water absorbing cotton contacts the printing plate cylinder and the rubber cylinder.

[0010] Preferably, the water absorbing component further comprises a telescopic driving member fixed on the cleaner, and an output end of the telescopic driving member is connected to a support box, and the water absorbing cotton can be detachably placed into the support box.

[0011] Preferably, a heater capable of heating and evaporating the water in the absorbent cotton is also fixed in the support box.

[0012] Preferably, the reciprocating mechanism includes a first rotating driving member fixed on the support frame, and a lead screw is rotatably arranged between the two support frames. The output end of the first rotating driving member is connected to the lead screw. The reciprocating mechanism also includes a guide rod arranged on the support frame, the lead screw is connected to the cleaner by a threaded connection, and the guide rod is slidably connected to the cleaner.

[0013] Compared with the prior art, the utility model has the following beneficial effects:

[0014] 1. The present application is provided with a spray assembly, the pump body of which can extract water from the waste liquid collection tank and spray the water evenly onto the surface of the plate cylinder and the rubber cylinder through the nozzle. This process can effectively loosen the dust or paper scraps attached to the cylinder. Subsequently, the cleaning roller is driven to rotate by the second rotating drive member to further remove these impurities. The device makes full use of the intermittent stop time of the offset printing press for cleaning operations, and can achieve efficient cleaning without stopping the machine, which significantly improves the cleaning efficiency;

[0015] 2. The present application is also equipped with a water absorption component for absorbing moisture from the surface of the plate cylinder and the rubber cylinder. The support box drives the absorbent cotton to contact the surface of the cylinder through the drive of the telescopic drive member to achieve reciprocating absorption of moisture. At the same time, the heater can quickly evaporate the moisture on the absorbent cotton to ensure the continuous water absorption capacity of the absorbent cotton, thereby maintaining the cleaning effect;

[0016] 3. When the spray assembly is not in use, the cleaner can be easily removed from the offset printing machine. This design facilitates the subsequent cleaning of paper scraps on the cleaning roller without affecting the normal printing operation of the offset printing machine, thus improving the maintenance convenience and flexibility of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a three-dimensional structural schematic diagram of an automatic cleaning rubber roller offset printing machine for packaging products of the utility model;

[0018] Figure 2 This is a first three-dimensional structural schematic diagram of a cleaning system of an offset printing press for packaging products with an automatic rubber cylinder cleaning type according to the utility model;

[0019] Figure 3 This is a second three-dimensional structural schematic diagram of a cleaning system of an offset printing press for packaging products with an automatic rubber cylinder cleaning type according to the utility model;

[0020] Figure 4 This is a schematic diagram of the three-dimensional structure of a spray assembly and a cleaner of a cleaning system of an offset printing machine for packaging products with automatic cleaning of a rubber cylinder according to the utility model;

[0021] Figure 5 This is a three-dimensional structural schematic diagram of a spray assembly of a cleaning system of an offset printing press for packaging products with an automatic rubber cylinder cleaning type according to the utility model;

[0022] Figure 6 The utility model is a schematic diagram of the exploded structure of a water absorption component of a spray component of a cleaning system of an offset printing machine for automatically cleaning a rubber roller for packaging products.

[0023] The numbers in the figure are: 1. offset printing machine body; 11. impression roller; 12. plate roller; 13. rubber roller; 2. cleaning system; 21. support frame; 22. spray assembly; 221. waste liquid collection box; 222. pump body; 223. filter; 224. temporary storage box; 2241. nozzle; 23. reciprocating mechanism; 231. lead screw; 232. guide rod; 233. first rotating drive member; 24. cleaner; 241. moving member; 2411. cleaning roller; 242. second rotating drive member; 25. water absorption assembly; 251. telescopic drive member; 2511. support box; 2512. heater; 252. water absorption cotton. DETAILED DESCRIPTION

[0024] In order to further understand the features, technical means, specific objectives and functions of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0025] Reference Figure 1-Figure 6 As shown, the utility model provides an offset printing machine for packaging products with an automatic cleaning rubber cylinder, comprising an offset printing machine body 1, on which an impression cylinder 11 and a plate cylinder 12 are rotatably connected, and on which a rubber cylinder 13 capable of contacting the plate cylinder 12 is further arranged, and a printing plate is mounted on the surface of the plate cylinder 12, on which a graphic part and a non-graphic part are engraved. During printing, ink adheres to the graphic part, and the ink is transferred to the substrate by the pressure of the rubber cylinder 13. The offset printing machine body 1 is also provided with a cleaning system 2 capable of cleaning paper scraps on the plate cylinder 12 and the rubber cylinder 13. The cleaning system 2 includes support frames 21 fixed on both sides of the offset printing machine body 1. The cleaning system 2 also includes a cleaner 24 capable of reciprocating along the length direction of the plate cylinder 12 and the rubber cylinder 13. The cleaning system 2 also includes a reciprocating mechanism 23 arranged between the support frames 21 and capable of driving the cleaner 24 to reciprocate. The cleaning system 2 includes a spray assembly 22 capable of spraying water onto the plate cylinder 12 and the rubber cylinder 13. A water absorbing assembly 25 for absorbing water on the plate cylinder 12 and the rubber cylinder 13 is also provided on one side of the cleaner 24.

[0026] During the operation of the offset printing press, the plate cylinder 12 and the rubber cylinder 13 rotate continuously to perform printing. Since paper may produce impurities such as paper scraps during the printing process, these impurities will adhere to the surface of the plate cylinder 12 and the rubber cylinder 13. The cleaning system 2 starts to work. The spray assembly 22 first sprays water onto the plate cylinder 12 and the rubber cylinder 13 to moisten and soften the impurities such as paper scraps attached to the surface of the plate cylinder 12 and the rubber cylinder 13. The reciprocating mechanism 23 drives the cleaner 24 to reciprocate along the length direction of the plate cylinder 12 and the rubber cylinder 13. During the movement, the cleaner 24 cleans the wetted and softened impurities such as paper scraps. At the same time, the water absorption assembly 25 arranged on one side of the cleaner 24 absorbs the moisture on the plate cylinder 12 and the rubber cylinder 13 to prevent excessive moisture from affecting the printing quality.

[0027] The cleaner 24 includes a moving member 241 arranged on the reciprocating mechanism 23, and a cleaning roller 2411 is also arranged on the moving member 241, which is in contact with the plate cylinder 12 and the rubber cylinder 13 respectively. A second rotating driving member 242 is fixed to the side of the cleaner 24 away from the water absorption component 25, and the output end of the second rotating driving member 242 is connected to the cleaning roller 2411. When the cleaning roller 2411 rotates, it can remove paper scraps on the plate cylinder 12 and the rubber cylinder 13.

[0028] The function of the second rotating driving member 242 is to provide rotational power for the cleaning roller 2411 so that the cleaning roller 2411 can rotate continuously. When the cleaning roller 2411 rotates, the paper scraps and other impurities attached to the plate roller 12 and the rubber roller 13 are removed through friction with the surfaces of the plate roller 12 and the rubber roller 13.

[0029] The spray assembly 22 includes a waste liquid collection box 221 arranged in the offset printing machine body 1, and the spray assembly 22 also includes a temporary storage box 224 fixed on the cleaner 24. The temporary storage box 224 is connected to a nozzle 2241 that can spray water onto the plate cylinder 12 and the rubber cylinder 13. The spray assembly 22 also includes a pump body 222 installed on the outside of the offset printing machine body 1 and pumping water in the waste liquid collection box 221 into the temporary storage box 224.

[0030] The pump body 222 is started to pump the water in the waste liquid collection box 221 into the temporary storage box 224. The temporary storage box 224 is fixed on the cleaner 24, and the cleaner 24 reciprocates along the length direction of the plate cylinder 12 and the rubber cylinder 13 under the drive of the reciprocating mechanism 23. When the temporary storage box 224 moves to a suitable position, the nozzle 2241 connected thereto starts to work, spraying water onto the plate cylinder 12 and the rubber cylinder 13, so that impurities such as paper scraps attached to the surface of the plate cylinder 12 and the rubber cylinder 13 are moistened and softened.

[0031] The spray assembly 22 further includes a filter 223 installed on the side of the offset printing machine body 1 and filtering water. The filter 223, the waste liquid collection box 221 and the pump body 222 are connected by a pipeline.

[0032] The water absorbing assembly 25 includes a water absorbing cotton 252 that can be close to the plate cylinder 12 and the rubber cylinder 13. When the water absorbing cotton 252 contacts the plate cylinder 12 and the rubber cylinder 13, it can absorb the moisture of the plate cylinder 12 and the rubber cylinder 13. The water absorbing assembly 25 also includes a telescopic driving member 251 fixed on the cleaner 24, and the output end of the telescopic driving member 251 is connected to a support box 2511, and the water absorbing cotton 252 can be detachably placed in the support box 2511. A heater 2512 that can heat and evaporate the moisture in the water absorbing cotton 252 is also fixed in the support box 2511. The telescopic driving member 251 controls the position of the support box 2511 through telescopic movement, thereby enabling the water absorbing cotton 252 to approach or move away from the plate cylinder 12 and the rubber cylinder 13. When it is necessary to absorb water, the telescopic driving member 251 pushes the supporting box 2511 to make the absorbent cotton 252 contact the plate cylinder 12 and the rubber cylinder 13; when it is not needed, it can be retracted to avoid affecting the work of other components. The heater 2512 can quickly dry the absorbent cotton 252 by heating and evaporating the water, so that it can continuously and effectively absorb the water on the surface of the cylinder, thereby improving the working efficiency of the water absorption component 25.

[0033] The reciprocating mechanism 23 includes a first rotating driving member 233 fixed on the support frame 21, and a lead screw 231 is rotatably arranged between the two support frames 21. The output end of the first rotating driving member 233 is connected to the lead screw 231. The reciprocating mechanism 23 also includes a guide rod 232 arranged on the support frame 21. The lead screw 231 is connected to the cleaner 24 by threads, and the guide rod 232 is slidably connected to the cleaner 24.

[0034] The first rotary drive member 233 is started, and the output rotary power drives the lead screw 231 to rotate. Since the lead screw 231 is connected to the cleaner 24 by threads, the cleaner 24 will perform reciprocating linear motion in the axial direction of the lead screw 231. At the same time, the guide rod 232 is slidably connected to the cleaner 24 to provide guidance for the movement of the cleaner 24, ensuring that the cleaner 24 remains stable during the movement and moves accurately along the length direction of the plate cylinder 12 and the rubber cylinder 13.

[0035] The above embodiments only express one or several implementation methods of the present invention, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the present invention. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention shall be based on the attached claims.

Claims

1. An offset printing press for packaging products with an automatic rubber cylinder cleaning function, comprising an offset printing press body (1), wherein an impression cylinder (11) and a printing plate cylinder (12) are rotatably connected to the offset printing press body (1), and a rubber cylinder (13) capable of contacting the printing plate cylinder (12) is further provided on the offset printing press body (1), wherein: The offset printing machine body (1) is also provided with a cleaning system (2) capable of cleaning paper scraps on the printing plate cylinder (12) and the rubber cylinder (13). The cleaning system (2) comprises support frames (21) fixed on both sides of the offset printing machine body (1). The cleaning system (2) also comprises a cleaner (24) capable of reciprocating along the length direction of the printing plate cylinder (12) and the rubber cylinder (13). The cleaning system (2) also comprises a reciprocating mechanism (23) arranged between the support frames (21) and capable of driving the cleaner (24) to reciprocate. The cleaning system (2) comprises a spray assembly (22) capable of spraying water onto the printing plate cylinder (12) and the rubber cylinder (13). A water absorbing assembly (25) for absorbing water on the printing plate cylinder (12) and the rubber cylinder (13) is also provided on one side of the cleaner (24).

2. The automatic cleaning type offset printing machine for packaging products according to claim 1, characterized in that: The cleaner (24) comprises a moving member (241) arranged on the reciprocating mechanism (23); the moving member (241) is further provided with a cleaning roller (2411) which contacts the printing plate cylinder (12) and the rubber cylinder (13) respectively; a second rotating driving member (242) is fixed to a side of the cleaner (24) away from the water absorbing assembly (25); an output end of the second rotating driving member (242) is connected to the cleaning roller (2411); and when the cleaning roller (2411) rotates, paper scraps on the printing plate cylinder (12) and the rubber cylinder (13) can be removed.

3. The offset printing machine for packaging products with automatic cleaning of rubber cylinder according to claim 1, characterized in that: The spray assembly (22) comprises a waste liquid collection box (221) arranged in the offset printing machine body (1), the spray assembly (22) further comprises a temporary storage box (224) fixed on the cleaner (24), the temporary storage box (224) is connected to a spray head (2241) capable of spraying water onto the printing plate cylinder (12) and the rubber cylinder (13), and the spray assembly (22) further comprises a pump body (222) installed outside the offset printing machine body (1) and pumping water in the waste liquid collection box (221) into the temporary storage box (224).

4. The automatic cleaning type offset printing press for packaging products according to claim 3, characterized in that: The spray assembly (22) further comprises a filter (223) installed on the side of the offset printing machine body (1) and filtering water; the filter (223), the waste liquid collection box (221) and the pump body (222) are connected via a pipeline.

5. The offset printing machine for packaging products with automatic cleaning of rubber cylinder according to claim 1, characterized in that: The water absorbing component (25) comprises water absorbing cotton (252) which can be close to the printing plate cylinder (12) and the rubber cylinder (13); when the water absorbing cotton (252) is in contact with the printing plate cylinder (12) and the rubber cylinder (13), it can absorb moisture from the printing plate cylinder (12) and the rubber cylinder (13).

6. The offset printing machine for packaging products with automatic cleaning of rubber cylinder according to claim 5, characterized in that: The water absorbing component (25) further comprises a telescopic driving member (251) fixed on the cleaner (24), and the output end of the telescopic driving member (251) is connected to a support box (2511), and the water absorbing cotton (252) can be detachably placed in the support box (2511).

7. The offset printing machine for packaging products with automatic cleaning of rubber cylinder according to claim 6, characterized in that: A heater (2512) capable of heating and evaporating the water in the water-absorbing cotton (252) is also fixed in the support box (2511).

8. The offset printing machine for packaging products with automatic cleaning of rubber cylinder according to claim 1, characterized in that: The reciprocating mechanism (23) comprises a first rotating driving member (233) fixed on the support frame (21); a lead screw (231) is rotatably arranged between the two support frames (21); an output end of the first rotating driving member (233) is connected to the lead screw (231); the reciprocating mechanism (23) further comprises a guide rod (232) arranged on the support frame (21); the lead screw (231) is connected to the cleaner (24) by means of threads; and the guide rod (232) is slidably connected to the cleaner (24).

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