Printer constant pressure roller of anti-sticking film

Abstract

The printing machine constant pressure roller comprises mounting plates, a supporting roller, a constant pressure roller body, an extrusion roller and a driving assembly, the two ends of the supporting roller are fixedly connected with the mounting plates, sliding grooves are formed in the two mounting plates, and sliding blocks are slidably connected into the sliding grooves; a plurality of evenly-distributed springs are arranged between the sliding blocks and the sliding grooves, and an extrusion roller is rotationally connected between the two sliding blocks. According to the printing machine constant pressure roller with the anti-sticking film, due to the arrangement of the anti-sticking film layer, adhesion of printing ink and impurities can be effectively prevented through polytetrafluoroethylene; the nano titanium dioxide has photocatalytic and antibacterial properties, can decompose organic pollutants, inhibits the formation of mucosa, and enhances the wear resistance of the anti-adherent film layer at the same time; and the organic silicon resin improves the adhesive force between the anti-sticking film layer and the roller body and ensures that the anti-sticking film layer is firm and durable, so that the anti-sticking film capability of the constant pressure roller is greatly improved, and the stability of printing quality is ensured.

Description

Technical Field

[0001] The invention relates to the technical field of printing machines, in particular to a constant pressure roller of a printing machine for an anti-sticking film. Background Art

[0002] In the field of printing equipment, the constant pressure roller of the printing press plays a key role in ensuring the printing quality. The traditional constant pressure roller of the printing press has exposed many problems in the actual operation process. On the one hand, as the printing operation continues, the ink is very easy to adhere to the surface of the constant pressure roller, forming a sticky film phenomenon. This will not only destroy the flatness of the surface of the constant pressure roller, resulting in uneven pressure distribution during printing, causing quality defects such as uneven ink color and dot deformation of the printed product; but the sticky film will also significantly increase the friction between the constant pressure roller and the printing material, accelerate the wear of both, and greatly shorten the service life of the equipment. At the same time, frequent wear also requires more maintenance work, reducing production efficiency.

[0003] On the other hand, in terms of heat dissipation, the traditional constant pressure roller lacks an effective heat dissipation mechanism. During the printing process, the constant pressure roller continuously rotates and rubs against other parts, which generates a lot of heat. The accumulation of heat will not only change the physical properties of the ink, increase its adhesion, and further aggravate the sticky film problem, but may also affect the structural stability of the constant pressure roller itself, and have a negative impact on the printing quality.

[0004] In addition, the traditional constant pressure roller is relatively simple in structure design, and it is difficult to meet the requirements of high-precision printing for pressure uniformity and stability. For example, when facing printing materials of different thicknesses and materials, the pressure cannot be flexibly adjusted, resulting in poor printing results. Moreover, the cleaning method of the traditional constant pressure roller usually relies on manual regular cleaning, which not only consumes manpower and time, but also interrupts production due to downtime for cleaning, increasing production costs. Summary of the invention

[0005] In view of the above-mentioned deficiencies in the prior art, the present invention provides a constant pressure roller for a printing press of an anti-sticking film, the purpose of which is to solve the problems raised in the above-mentioned background technology.

[0006] In order to achieve the above-mentioned object of the invention, the technical solution adopted by the present invention is:

[0007] A constant pressure roller of a printing press for an anti-adhesive film, comprising a mounting plate, a supporting roller, a constant pressure roller, an extrusion roller and a driving assembly, wherein both ends of the supporting roller are fixedly connected to the mounting plates, two mounting plates are provided with slide grooves, a slider is slidably connected in the slide groove, a plurality of evenly distributed springs are arranged between the slider and the slide groove, and an extrusion roller is rotatably connected between the two sliders;

[0008] The constant pressure roller comprises a heat-conducting sleeve fixedly connected to the support roller, a roller body is rotatably connected to the heat-conducting sleeve, an anti-sticking film layer is arranged on the outer side of the roller body, and a heat dissipation mechanism is arranged between the heat-conducting sleeve and the support roller.

[0009] Furthermore, the heat dissipation mechanism includes a water tank disposed between the heat-conducting sleeve and the supporting roller, one end of the water tank is connected to a water inlet joint, and one end of the water tank away from the water inlet joint is connected to a water outlet joint.

[0010] Furthermore, the water tank is in a bolt shape.

[0011] Furthermore, the anti-adhesive film layer is made of the following raw materials in parts by weight: 60-80 parts of polytetrafluoroethylene, 10-20 parts of nano titanium dioxide, and 10-20 parts of silicone resin.

[0012] Furthermore, the step of making the anti-adhesive film layer includes: weighing 60-80 parts of polytetrafluoroethylene, 10-20 parts of nano titanium dioxide, and 10-20 parts of silicone resin in parts by weight;

[0013] Add polytetrafluoroethylene and nano-titanium dioxide into a high-speed mixer, and stir at a speed of 1000-1500 rpm for 30-60 minutes to fully mix the polytetrafluoroethylene and nano-titanium dioxide;

[0014] The raw material mixture is evenly coated on the outer surface of the roller body by spraying or dipping, and then cured at a temperature of 180-220° C. for 2-4 hours to form an anti-sticking film layer.

[0015] Furthermore, the heat-conducting sleeve is made of diamond.

[0016] Furthermore, the roller body is made of high-strength aluminum alloy.

[0017] Furthermore, a rubber layer is provided on the surface of the squeezing roller.

[0018] Furthermore, the squeezing roller is arranged to be in conflict with the constant pressure roller.

[0019] Furthermore, the driving assembly includes a servo motor fixedly mounted on a mounting plate, a driving gear is fixedly connected to an output shaft of the servo motor, a driven gear is fixedly connected to the roller body, and the driving gear and the driven gear are meshed with each other.

[0020] The beneficial effects of the present invention are:

[0021] The invention discloses a constant pressure roller of a printing press with an anti-sticking film. The polytetrafluoroethylene can effectively prevent the adhesion of ink and impurities through the anti-sticking film layer. The nano titanium dioxide has photocatalytic and antibacterial properties, can decompose organic pollutants, inhibit the formation of sticky films, and enhance the wear resistance of the anti-sticking film layer. The silicone resin improves the adhesion between the anti-sticking film layer and the roller body, ensuring that the anti-sticking film layer is firm and durable, thereby greatly improving the anti-sticking film ability of the constant pressure roller and ensuring the stability of printing quality.

[0022] Through the heat dissipation mechanism, the heat of the roller body can be quickly transferred to the circulating water in the water tank, effectively reducing the surface temperature of the roller body, reducing the ink adhesion problem caused by heat, and extending the service life of the constant pressure roller.

[0023] By setting up the squeezing roller, when the thickness or material of the printing material changes, the squeezing roller can adaptively adjust the pressure between it and the constant pressure roller under the action of the spring, ensuring that the pressure always remains uniform and stable during the printing process, thereby improving the adaptability of the printing press to different printing materials and improving printing quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0025] Figure 2 It is a schematic diagram of the three-dimensional structure of the present invention;

[0026] Figure 3 It is a schematic cross-sectional structure diagram of a pressure roller of the present invention;

[0027] Figure 4 It is a schematic diagram of the structure of the heat-conducting sleeve of the present invention.

[0028] Reference table of reference numerals:

[0029] 1. Mounting plate; 2. Support roller; 3. Constant pressure roller; 4. Squeeze roller; 5. Drive assembly; 6. Slide; 7. Slider; 8. Spring; 9. Heat-conducting sleeve; 10. Roller body; 11. Anti-sticking film layer; 12. Heat dissipation mechanism; 13. Water tank; 14. Water inlet joint; 15. Water outlet joint; 16. Servo motor; 17. Driving gear; 18. Driven gear. DETAILED DESCRIPTION

[0030] The specific implementation of the present invention is further described below in conjunction with the accompanying drawings, wherein the same components are represented by the same reference numerals.

[0031] It should be noted that the words "front", "rear", "left", "right", "up" and "down" used in the following description refer to directions in the drawings, and the words "inside" and "outside" refer to directions toward or away from the geometric center of a specific component, respectively.

[0032] In order to make the contents of the present invention more clearly understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0033] like Figures 1 to 4 As shown, a constant pressure roller of a printing press for an anti-sticking film includes a mounting plate 1, a supporting roller 2, a constant pressure roller 3, a squeezing roller 4 and a driving component 5.

[0034] Both ends of the support roller 2 are firmly fixedly connected to the mounting plate 1. The mounting plate 1 plays the role of supporting and fixing the entire constant pressure roller assembly and is connected to the frame of the printing press. The mounting plate 1 is made of high-strength metal material to ensure its sufficient strength and rigidity.

[0035] The support roller 2 is the basic supporting component of the entire constant pressure roller assembly. It supports the constant pressure roller 3 and guides the movement of the printing material during the printing process. The support roller 2 is also made of high-strength metal materials, and its surface is precisely processed with high flatness and finish to reduce the friction between it and the printing material and avoid damage to the surface of the printing material. At the same time, the internal structure of the support roller 2 is optimized to have sufficient strength and rigidity, and can maintain a stable shape and performance during long-term working.

[0036] The constant pressure roller 3 includes a heat-conducting sleeve 9 fixedly connected to the support roller 2 , a roller body 10 is rotatably connected to the heat-conducting sleeve 9 , an anti-sticking film layer 11 is provided on the outer side of the roller body 10 , and a heat dissipation mechanism 12 is provided between the heat-conducting sleeve 9 and the support roller 2 .

[0037] The heat-conducting sleeve 9 is made of diamond, which has extremely high thermal conductivity, and its thermal conductivity is much higher than that of ordinary metal materials. During the printing process, the constant pressure roller 3 will generate a lot of heat due to the friction with the printing material and its own rotation. The heat-conducting sleeve 9 can quickly transfer the heat generated by the roller body 10, effectively reducing the temperature of the roller body 10. Diamond also has extremely high hardness and wear resistance, which can ensure that the heat-conducting sleeve 9 is not easy to wear during long-term use, maintain its good thermal conductivity and structural stability, and increase the service life of the constant pressure roller 3.

[0038] The roller body 10 is made of high-strength aluminum alloy. Aluminum alloy has the characteristics of low density and light weight, which makes the roller body 10 relatively light in weight while ensuring sufficient strength, and is easy to install and operate. At the same time, aluminum alloy also has good mechanical strength and corrosion resistance, can withstand various forces in the printing process, and is not easy to deform. During the manufacturing process, the roller body 10 is precisely processed, and the roundness and cylindricity errors of its surface are controlled within a very small range, ensuring that a stable pressure output can be maintained during the rotation process, ensuring the consistency of printing quality.

[0039] The anti-adhesive film layer 11 is composed of 60-80 parts of polytetrafluoroethylene, 10-20 parts of nano titanium dioxide and 10-20 parts of silicone resin.

[0040] Polytetrafluoroethylene: Polytetrafluoroethylene has an extremely low surface friction coefficient, which makes it difficult for ink and impurities to adhere to its surface. It can effectively prevent the accumulation of ink on the surface of the roller 10, thereby preventing the occurrence of sticking film. At the same time, polytetrafluoroethylene also has good chemical stability and corrosion resistance, and can maintain its stable performance in various harsh printing environments.

[0041] Nano-titanium dioxide: Nano-titanium dioxide has unique photocatalytic and antibacterial properties. Under light conditions, nano-titanium dioxide can decompose organic pollutants in the air and inhibit the adhesion and growth of ink and impurities on the roller surface. In addition, nano-titanium dioxide can also enhance the wear resistance of the anti-adhesion film layer 11, making it less prone to wear during long-term use, thereby extending the service life of the anti-adhesion film layer.

[0042] Organic silicon resin: The main function of organic silicon resin is to improve the adhesion between the anti-adhesive film layer 11 and the surface of the roller body 10. It can make materials such as polytetrafluoroethylene and nano titanium dioxide firmly adhere to the surface of the roller body 10 to form a stable protective layer. At the same time, organic silicon resin also has certain flexibility and weather resistance, can adapt to the slight deformation of the roller body 10 during the rotation process, and ensure the integrity of the anti-adhesive film layer.

[0043] The steps for making the anti-adhesive film layer 11 are as follows:

[0044] First, accurately weigh 60-80 parts of polytetrafluoroethylene, 10-20 parts of nano-titanium dioxide, and 10-20 parts of silicone resin according to weight.

[0045] Then, add the polytetrafluoroethylene and nano-titanium dioxide into a high-speed mixer and stir at a speed of 1000-1500 rpm for 30-60 minutes to fully mix the polytetrafluoroethylene and nano-titanium dioxide. During the stirring process, the two materials are fully dispersed and mixed by the high-speed rotating stirring blades to ensure that the anti-adhesive film layer formed later has uniform performance.

[0046] Next, add the organic silicon resin to the above-mentioned mixture and continue stirring for 20-30 minutes to fully blend the organic silicon resin with the polytetrafluoroethylene and the nano-titanium dioxide. At this point, the formed raw material mixture has good fluidity and adhesion, which is convenient for subsequent coating operations.

[0047] Finally, the raw material mixture is evenly coated on the outer surface of the roller body 10 by spraying or dipping. The spraying method can spray the raw material mixture evenly onto the roller surface in the form of mist through a spray gun, which can achieve more precise coating control; the dipping method is to immerse the roller body 10 in the raw material mixture so that a layer of raw material is evenly attached to the roller surface. Regardless of which coating method is used, it is necessary to ensure the uniformity and thickness consistency of the coating. After the coating is completed, the roller body 10 is cured at a temperature of 180-220°C for 2-4 hours, so that the raw material mixture forms a hard and firm anti-sticking film layer 11 on the roller surface.

[0048] The heat dissipation mechanism 12 includes a water tank 13 provided between the heat-conducting sleeve 9 and the supporting roller 2. One end of the water tank 13 is connected to a water inlet joint 14. One end of the water tank 13 away from the water inlet joint 14 is connected to a water outlet joint 15. The water tank 13 is in a bolt shape.

[0049] During the printing process, circulating water is introduced into the water tank 13 through the water inlet joint 14. Since the water tank 13 is in the shape of a bolt, the contact area between the water and the heat-conducting sleeve 9 is greatly increased, so that the heat can be more fully transferred to the water. The circulating water flows in the water tank 13, absorbs the heat transferred from the heat-conducting sleeve 9, flows out through the water outlet joint 15, and then enters the water tank 13 again through the water inlet joint 14 after being cooled by the cooling device, forming a circulating heat dissipation system. The heat-conducting sleeve 9 is made of diamond, and its extremely high thermal conductivity can quickly transfer the heat generated by the roller body 10 to the circulating water in the water tank 13, thereby effectively reducing the surface temperature of the roller body 10. It can not only reduce the ink adhesion problem caused by heat, but also ensure that the constant pressure roller 3 maintains stable performance during long-term work, thereby improving the stability of printing quality.

[0050] The squeezing roller 4 is arranged in contact with the constant pressure roller 3, and it assists the constant pressure roller 3 in applying pressure to the printing material during the printing process. The surface of the squeezing roller 4 is provided with a rubber layer, and the rubber layer has a certain elasticity and friction. The elasticity of the rubber layer enables the squeezing roller 4 to better adapt to the surface undulations of the printing material, ensuring that uniform pressure is applied to the printing material during the entire printing process; the friction of the rubber layer helps to better convey the printing material and prevent the printing material from slipping during the printing process.

[0051] Both mounting plates 1 are provided with a slide groove 6, in which a slider 7 is slidably connected, a plurality of evenly distributed springs 8 are arranged between the slider 7 and the slide groove 6, and an extrusion roller 4 is rotatably connected between the two sliders 7. This structural design forms an elastic extrusion structure. When the thickness or material of the printing material changes, the extrusion roller 4 will adaptively adjust the pressure between the extrusion roller 4 and the constant pressure roller 3 under the action of the spring 8. For example, when the printing material is thicker, the extrusion roller 4 will be subjected to greater pressure, and the spring 8 will be compressed, thereby increasing the distance between the extrusion roller 4 and the constant pressure roller 3 to adapt to the thicker printing material; when the printing material is thinner, the spring 8 will stretch, thereby reducing the distance between the extrusion roller 4 and the constant pressure roller 3, ensuring that appropriate pressure is applied to the printing material. This elastic extrusion structure can ensure that the pressure remains uniform and stable during the printing process, improves the adaptability of the printing press to different printing materials, and is conducive to improving the printing quality.

[0052] The driving assembly 5 includes a servo motor 16 fixedly mounted on the mounting plate 1 , a driving gear 17 is fixedly connected to the output shaft of the servo motor 16 , a driven gear 18 is fixedly connected to the roller body 10 , and the driving gear 17 and the driven gear 18 are meshed.

[0053] During the printing process, the servo motor 16 is started, and its output shaft drives the driving gear 17 to rotate. The driving gear 17 transmits power to the roller body 10 by meshing with the driven gear 18, so that the roller body 10 starts to rotate. The servo motor 16 has a high-precision speed control capability and can accurately adjust the speed of the roller body 10 according to the requirements of the printing process. At the same time, the meshing transmission mode of the driving gear 17 and the driven gear 18 has the characteristics of stable transmission ratio and high transmission efficiency, which can provide stable and accurate power output for the constant pressure roller 3, ensuring that the speed of the constant pressure roller 3 is stable during the printing process, thereby achieving high-quality printing operations.

[0054] The constant pressure roller 3 of the printing press of the anti-adhesive film of the present invention has good adaptability when facing different types of printing materials. Whether it is paper, plastic film or metal foil, the constant pressure roller 3 can ensure that the ink is evenly transferred to the printing material through its unique elastic extrusion structure and stable pressure output. For example, when printing high-quality coated paper, the constant pressure roller 3 can accurately adjust the pressure according to the smooth surface and high ink absorption of the coated paper, so that the ink forms a clear and bright pattern on the coated paper; and when printing plastic film, the elastic extrusion structure of the constant pressure roller 3 can adapt to the soft characteristics of the plastic film, avoid deformation or rupture of the film due to excessive pressure, and ensure good transfer of ink.

[0055] Since the anti-adhesion film layer 11 of the constant pressure roller 3 can effectively prevent the adhesion and accumulation of ink, the constant pressure roller 3 can always maintain uniform ink transfer during the rotation process. This ensures that the ink color of the printed product is uniform over the entire format, avoiding the color deviation problem caused by uneven ink distribution. Whether it is large-area solid printing or fine dot printing, it can present high-quality printing effects.

[0056] Stable pressure output and good heat dissipation performance ensure the stability of the constant pressure roller 3 during the printing process. This allows the dots to be clearly and sharply transferred to the printing material when printing, avoiding problems such as dot deformation, expansion or reduction caused by pressure fluctuations or heat accumulation. This improves the resolution and detail expression of the printed product, making the printed product more realistic and vivid.

[0057] The conventional constant pressure roller 3 has a serious problem of sticking film, and needs to be frequently stopped for cleaning and maintenance, which greatly reduces production efficiency. The anti-sticking film constant pressure roller 3 of the present invention can significantly reduce the occurrence of sticking film phenomenon through its excellent anti-sticking film performance, thereby reducing the number and time of stopping for cleaning. At the same time, the efficient heat dissipation mechanism 12 also ensures the long-term stable operation of the constant pressure roller 3, reduces the downtime caused by equipment failure, and improves production efficiency.

[0058] Quick plate change and adjustment: During the printing process, it is often necessary to change the printing plate and adjust the printing parameters. The constant pressure roller 3 assembly of the present invention has a reasonable structural design, is easy to install and disassemble, and can quickly complete the plate change operation. At the same time, its elastic extrusion structure and precise drive assembly 5 make it more convenient and efficient to adjust the printing pressure and speed, and can quickly adapt to different printing tasks, further improving production efficiency.

[0059] The constant pressure roller 3 of the printing press with an anti-adhesive film of the present invention has excellent performance in the printing process through the anti-adhesive film layer 11, the efficient heat dissipation mechanism 12, the flexible pressure adjustment mechanism and the stable driving component 5. Whether in improving the printing quality, enhancing the adaptability to different printing materials, or improving the production efficiency, it has shown significant advantages and progress.

[0060] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. A constant pressure roller for a printing press of an anti-adhesive film, characterized in that: It comprises a mounting plate (1), a supporting roller (2), a constant pressure roller (3), a squeezing roller (4) and a driving assembly (5), wherein both ends of the supporting roller (2) are fixedly connected to the mounting plate (1), a slide groove (6) is provided on the two mounting plates (1), a slider (7) is slidably connected in the slide groove (6), a plurality of evenly distributed springs (8) are provided between the slider (7) and the slide groove (6), and a squeezing roller (4) is rotatably connected between the two sliders (7); The constant pressure roller (3) comprises a heat-conducting sleeve (9) fixedly connected to the support roller (2); a roller body (10) is rotatably connected to the heat-conducting sleeve (9); an anti-sticking film layer (11) is provided on the outer side of the roller body (10); and a heat dissipation mechanism (12) is provided between the heat-conducting sleeve (9) and the support roller (2).

2. The constant pressure roller of a printing press for an anti-adhesive film according to claim 1, characterized in that: The heat dissipation mechanism (12) comprises a water tank (13) disposed between the heat-conducting sleeve (9) and the support roller (2); one end of the water tank (13) is connected to a water inlet joint (14); and one end of the water tank (13) away from the water inlet joint (14) is connected to a water outlet joint (15).

3. The constant pressure roller of a printing press for an anti-adhesive film according to claim 2, characterized in that: The water tank (13) is in the shape of a bolt.

4. The constant pressure roller of a printing press for an anti-adhesive film according to claim 1, characterized in that: The anti-adhesive film layer (11) is made of the following raw materials in parts by weight: 60-80 parts of polytetrafluoroethylene, 10-20 parts of nano titanium dioxide, and 10-20 parts of organic silicon resin.

5. The constant pressure roller of a printing press for an anti-adhesive film according to claim 4, characterized in that: The steps of making the anti-adhesive film layer (11) include: weighing 60-80 parts of polytetrafluoroethylene, 10-20 parts of nano titanium dioxide, and 10-20 parts of silicone resin in parts by weight; Add polytetrafluoroethylene and nano-titanium dioxide into a high-speed mixer, and stir at a speed of 1000-1500 rpm for 30-60 minutes to fully mix the polytetrafluoroethylene and nano-titanium dioxide; The raw material mixture is evenly coated on the outer surface of the roller body by spraying or dipping, and then cured at a temperature of 180-220° C. for 2-4 hours to form an anti-sticking film layer.

6. The constant pressure roller of a printing press for a non-stick film according to claim 1, characterized in that: The heat-conducting sleeve (9) is made of diamond.

7. The constant pressure roller of a printing press for a non-stick film according to claim 1, characterized in that: The roller body (10) is made of high-strength aluminum alloy material.

8. The constant pressure roller of a printing press for a release film according to claim 1, characterized in that: The surface of the squeezing roller (4) is provided with a rubber layer.

9. The constant pressure roller of a printing press for a release film according to claim 8, characterized in that: The squeezing roller (4) is arranged in abutment with the constant pressure roller (3).

10. The constant pressure roller of a printing press for a release film according to claim 1, characterized in that: The driving assembly (5) comprises a servo motor (16) fixedly mounted on the mounting plate (1); a driving gear (17) is fixedly connected to the output shaft of the servo motor (16); a driven gear (18) is fixedly connected to the roller body (10); and the driving gear (17) and the driven gear (18) are meshed with each other.

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