Gravure ink fountain assembly and method of ink roll pick up
By installing vibration devices on the ink-dipping roller and printing roller to eliminate air bubbles and combining this with a doctor blade to scrape off excess ink, the problems of air bubbles and uneven ink dipping in the ink tank are solved, achieving uniform ink transfer and improved printing results.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- HENAN JINSHANGYUAN PACKAGING MATERIALS CO LTD
- Filing Date
- 2024-12-23
- Publication Date
- 2026-06-23
AI Technical Summary
In existing gravure printing equipment, air bubbles often exist in the ink tank, and the ink roller has difficulty effectively picking up and transferring ink, resulting in poor printing results.
Vibration devices are installed on the ink-dipping roller and the printing roller to eliminate air bubbles through up-and-down vibration, and to ensure contact through a rubber material layer. Combined with a doctor blade to remove excess ink, this achieves uniform ink transfer.
It effectively eliminates air bubbles in the ink tank, ensuring that the ink roller can evenly pick up ink and transfer it to the printing roller, thus improving printing quality.
Smart Images
Figure CN122253544A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of printing technology, and more specifically to a gravure ink tank assembly and a method for operating the gravure ink tank assembly. Background Technology
[0002] Gravure printing, also known as intaglio printing, involves the following process: First, the entire surface of the printing plate is coated with ink. Then, a doctor blade removes the ink from the non-image areas, leaving only ink in the recesses of the image areas. Finally, under significant pressure, the ink in the recesses is transferred to the surface of the substrate to obtain the printed product. Gravure printing is a direct printing method where the image areas of the printing plate are recessed, with the degree of recess varying depending on the depth of the image, while the non-image areas are raised and lie on the same plane.
[0003] The gravure printing apparatus has a gravure ink tank assembly.
[0004] The gravure ink tank assembly includes a frame on which an ink tank, an ink-dipping roller, a printing roller, a liner roller, and a doctor blade are mounted. The ink-dipping roller extends into the ink tank and has ink-dipping roller shafts at both ends, which are mounted on the frame. The ink-dipping roller and the printing roller are in side contact. The printing roller and the liner roller are located at a printing station. The printing roller has recesses and flat areas around the recesses, and excess ink on the flat areas of the ink-dipping roller is scraped off.
[0005] During operation, the ink tank contains ink, the ink-dipping roller picks up the ink, and excess ink around the printing roller is scraped off by a doctor blade. The remaining ink in the cavities on the printing roller is the effective ink, which is then transferred to the printing roller to print on the substrate. However, during operation, the ink in the ink tank often contains many air bubbles, making it difficult for the ink to overflow naturally. In addition, the ink-dipping roller has the disadvantage of not being able to pick up ink well. In the existing technology, the ink-dipping roller is mounted on the device frame, which cannot help eliminate air bubbles in the ink, nor can it pick up ink well or transfer ink to the printing roller effectively. These issues need to be addressed. Summary of the Invention
[0006] The purpose of this invention is to address the aforementioned shortcomings by providing a gravure ink tank assembly and a method for operating the gravure ink tank assembly, which can reduce air bubbles in the ink tank, enable the ink-dipping roller to effectively pick up ink, and transfer the ink to the printing roller.
[0007] The technical solution of the gravure ink tank assembly of the present invention is implemented as follows: A gravure ink tank assembly includes a frame, on which an ink tank, an ink-dipping roller, a printing roller, a liner roller, and a doctor blade are mounted. The ink-dipping roller extends into the ink tank and has ink-dipping roller shafts at both ends, which are mounted on the frame. The printing roller has printing roller shafts at both ends, which are mounted on the frame. The ink-dipping roller and the printing roller are in side contact. A printing station is located between the printing roller and the liner roller. The doctor blade has a blade edge, which contacts the side of the printing roller to scrape off excess ink from the ink-dipping roller. Its characteristic is that: The device frame has a vertically oriented sliding groove, which is the first sliding groove. A slider is installed in the first sliding groove, which is the first slider. The first slider has a first mounting hole for the ink-dipping roller shaft, which is installed in the first mounting hole. A first spring is installed on the slider in the sliding groove. A first vibration device is also installed on the device frame. The first vibration device has a vibration output end. The vibration direction of the vibration device is vertical, and the vibration output end faces upward and pushes against the first slider. The ink-dipping roller is surrounded by a first rubber material layer. The thickness deformation of the first rubber material layer ensures that when the vibration device acts on the ink-dipping roller, the ink-dipping roller is always in contact with the printing roller.
[0008] Furthermore, the amplitude generated by the first vibration device is 1 to 2 millimeters, and the vibration frequency is 10 to 15 Hz.
[0009] Furthermore, the thickness of the first rubber layer is 10 to 15 millimeters.
[0010] Furthermore, the device frame has a vertically oriented sliding groove, which is a second sliding groove. A slider is installed in the second sliding groove, which is a second slider. The second slider has a second mounting hole for the printing roller shaft head, which is installed in the second mounting hole. A second spring is located on the slider in the second sliding groove. A second vibration device is also installed on the device frame. The second vibration device has a vibration output end, and the vibration direction of the vibration device is vertical. The vibration output end faces upward and pushes against the second slider. The printing roller is surrounded by a second rubber material layer. The thickness deformation of the second rubber material layer ensures that when the vibration device acts on the printing roller, the ink-dipping roller always contacts the printing roller.
[0011] In one technical solution, the first vibration device and the second vibration device are connected to a control device, and the control device causes the vibrations of the first vibration device and the second vibration device to be asynchronous.
[0012] Furthermore, the vibration device is installed inside the lower part of the chute.
[0013] Furthermore, the blade of the doctor blade is installed at three points on the side where the printing roller contacts the ink-dipping roller and is set vertically downwards.
[0014] The technical solution of the gravure ink tank assembly operation method of the present invention is implemented as follows: the gravure ink tank assembly operation method uses an ink-dipping roller to dip into the ink tank, and a scraper device to scrape off the excess ink on the ink-dipping roller, leaving only the effective ink on the ink-dipping roller. The ink-dipping roller transfers the effective ink to the printing roller, which can realize the printing of the substrate. The ink-dipping roller vibrates in the vertical direction in the ink tank to eliminate air bubbles in the ink tank. At the same time, the direction of vibration of the ink-dipping roller is perpendicular to the contact part of the printing roller it contacts, so as to achieve better coating of the effective ink on the printing roller.
[0015] Furthermore, a doctor blade is used to scrape off excess ink from the printing roller. The doctor blade acts on three points on the side of the printing roller and scrapes off the excess ink downwards. The three points on the side are the side of the printing roller that comes out after contacting the ink-dipping roller.
[0016] Furthermore, the printing roller receives the ink from the ink-dipping roller while vibrating, and the direction of the vibration is perpendicular to the contact area.
[0017] Furthermore, the printing roller prints on the substrate by supplying ink while vibrating, and the direction of vibration is perpendicular to the surface of the substrate.
[0018] The beneficial effects of this invention are: the gravure ink tank assembly and the method of operating the gravure ink tank assembly have the advantages of reducing air bubbles in the ink tank, enabling the ink-dipping roller to pick up ink well, the ink-dipping roller to transfer ink well to the printing roller, and the printing roller to coat the ink well onto the substrate. Attached Figure Description
[0019] Figure 1 This is a side view of the gravure ink tank assembly of the present invention.
[0020] Figure 2 yes Figure 1 A schematic diagram of the cross-sectional structure along the A-A direction.
[0021] Figure 3 yes Figure 2 A schematic diagram of the cross-sectional structure along the B-B direction.
[0022] Among them: 1. Device frame 11. Printing station 12. First chute 13. Second chute 2. Ink tank 3. Ink dip roller 31. Ink dip roller shaft head 32. First slider 33. First spring 34. First vibration device 35. First rubber material layer 4. Printing roller 41. Printing roller shaft head 42. Second slider 43. Second spring 44. Second vibration device 45. Second rubber material layer 46. Position of point 3 5. Liner roller 6. Scraper 61. Blade. Detailed Implementation
[0023] The technical solution of the present invention will be further described below with reference to the embodiments.
[0024] like Figure 1 , 2 As shown in Figure 3, a gravure ink tank assembly includes a frame 1, on which an ink tank 2, an ink-dipping roller 3, a printing roller 4, a liner roller 5, and a doctor blade 6 are mounted. The ink-dipping roller extends into the ink tank and has ink-dipping roller shaft heads 31 at both ends, which are mounted on the frame. The printing roller has printing roller shaft heads 41 at both ends, which are mounted on the frame. The ink-dipping roller and the printing roller are in side contact. A printing station 11 is located between the printing roller and the liner roller. The doctor blade has a blade 61, which contacts the side of the printing roller to scrape off excess ink. The characteristic feature is that the frame has... There is a vertically oriented slide groove, which is the first slide groove 12. A slider is installed in the first slide groove, which is the first slider 32. The first slider has a first mounting hole for the ink-dipping roller shaft head, which is installed in the first mounting hole. A first spring 33 is provided on the slider in the slide groove. A first vibration device 34 is also installed on the device frame. The first vibration device has a vibration output end. The vibration direction of the vibration device is vertical, and the vibration output end is facing upward and pressing against the first slider. The ink-dipping roller is surrounded by a first rubber material layer 35. The thickness deformation of the first rubber material layer ensures that the ink-dipping roller is always in contact with the printing roller when the vibration device acts on the ink-dipping roller.
[0025] With the above-mentioned configuration of the present invention, the vibration of the ink-dipping roller acts on the ink, which can cause the air bubbles in the ink tank to rise quickly and achieve the effect of eliminating the air bubbles. At the same time, the vibration of the ink-dipping roller also helps to more evenly pick up the ink on the ink-dipping roller, so that there are no areas on the ink-dipping roller that are not picked up with ink.
[0026] Furthermore, the amplitude generated by the first vibration device is 1 to 2 millimeters, and the vibration frequency is 10 to 15 Hz.
[0027] Tests have shown that these parameters are more effective at eliminating air bubbles in ink.
[0028] Furthermore, the thickness of the first rubber layer is 10 to 15 millimeters.
[0029] Furthermore, the device frame has a vertically oriented sliding groove, which is the second sliding groove 13. A slider, the second slider 42, is installed in the second sliding groove. The second slider has a second mounting hole for the printing roller shaft head, which is installed in the second mounting hole. A second spring 43 is located on the slider in the second sliding groove. A second vibration device 44 is also installed on the device frame. The second vibration device has a vibration output end, and the vibration direction of the vibration device is vertical. The vibration output end faces upward and pushes against the second slider. A second rubber material layer 45 is provided around the printing roller. The thickness deformation of the second rubber material layer ensures that the ink-dipping roller is always in contact with the printing roller when the vibration device acts on the printing roller.
[0030] With the above-mentioned configuration of the present invention, when the first vibration device moves upward or the second vibration device moves downward, the printing roller can effectively receive the ink transferred from the dip roller; on the other hand, when the second vibration device moves upward, the ink on the printing roller can also be effectively transferred to the substrate, so that the ink adheres more firmly to the substrate.
[0031] In one technical solution, the first vibration device and the second vibration device are connected to a control device, and the control device makes the vibration of the first vibration device and the second vibration device asynchronous. The above arrangement of the present invention avoids the phenomenon that the contact part between the ink roller and the printing roller does not work.
[0032] Furthermore, the vibration device is installed inside the lower part of the chute.
[0033] Furthermore, the blade of the doctor blade is installed at position 46, which is the 3rd point on the side where the printing roller contacts the ink-dipping roller, and is set vertically downward.
[0034] This design also has the advantage of better removing excess ink from the ink roller.
[0035] The technical solution of the gravure ink tank assembly operation method of the present invention is implemented as follows: the gravure ink tank assembly operation method uses an ink-dipping roller to dip into the ink tank, and uses the blade of a doctor blade to scrape off excess ink on the printing roller, leaving effective ink on the printing roller. The printing roller transfers the effective ink to the paper, which can realize the printing of the substrate. The ink-dipping roller vibrates in the vertical direction in the ink tank to eliminate air bubbles in the ink tank. At the same time, the direction of vibration of the ink-dipping roller is perpendicular to the contact part of the printing roller it contacts, so as to achieve better coating of effective ink on the printing roller.
[0036] Furthermore, a doctor blade is used to scrape off excess ink from the printing roller. The doctor blade acts on three points on the side of the printing roller and scrapes off excess ink downwards. The three points on the side are the side from which the ink roller exits the ink trough, that is, the side that has not transferred ink to the paper, i.e., the side containing more ink.
[0037] Furthermore, the printing roller receives the ink from the ink-dipping roller while vibrating, and the direction of the vibration is perpendicular to the contact area.
[0038] Furthermore, the printing roller prints on the substrate by supplying ink while vibrating, and the direction of vibration is perpendicular to the surface of the substrate.
[0039] It should be noted that the embodiments and beneficial effects of the above-described gravure ink tank assembly and the method of working of the gravure ink tank assembly can be explained, supplemented and understood by each other.
[0040] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.
Claims
1. A gravure ink tank assembly, comprising a frame, on which an ink tank, an ink-dipping roller, a printing roller, a liner roller, and a doctor blade are mounted. The ink-dipping roller extends into the ink tank, and has ink-dipping roller shafts at both ends, which are mounted on the frame. The printing roller has printing roller shafts at both ends, which are mounted on the frame. The ink-dipping roller and the printing roller are in side contact. A printing station is located between the printing roller and the liner roller. The doctor blade has a cutting edge that contacts the side of the printing roller to scrape off excess ink. Its characteristic feature is: The device frame has a vertically oriented sliding groove, which is the first sliding groove. A slider is installed in the first sliding groove, which is the first slider. The first slider has a first mounting hole for the ink-dipping roller shaft, which is installed in the first mounting hole. A first spring is located on the slider in the sliding groove. A first vibration device is also installed on the device frame. The first vibration device has a vibration output end, and the vibration direction of the vibration device is vertical. The vibration output end faces upward and pushes against the first slider. The ink-dipping roller is surrounded by a first rubber material layer. The thickness deformation of the first rubber material layer ensures that the ink-dipping roller is always in contact with the printing roller when the vibration device acts on the ink-dipping roller. The thickness of the first rubber layer is 10-15 mm.
2. The gravure ink tank assembly according to claim 1, characterized in that: The amplitude generated by the first vibration device is 1 to 2 millimeters, and the vibration frequency is 10 to 15 Hz.
3. The gravure ink tank assembly according to claim 1 or 2, characterized in that: The device frame has a vertically oriented sliding groove, which is a second sliding groove. A slider is installed in the second sliding groove, which is a second slider. The second slider has a second mounting hole for the printing roller shaft head, which is installed in the second mounting hole. A second spring is installed on the slider in the second sliding groove. A second vibration device is also installed on the device frame. The second vibration device has a vibration output end. The vibration direction of the vibration device is vertical, and the vibration output end faces upward and pushes against the second slider. The printing roller is surrounded by a second rubber material layer. The thickness deformation of the second rubber material layer ensures that when the vibration device acts on the printing roller, the ink-dipping roller always contacts the printing roller.
4. The working method of the gravure ink tank assembly is as follows: an ink-dipping roller dips into the ink tank, and a scraper removes excess ink from the ink-dipping roller, leaving only effective ink. The ink-dipping roller transfers the effective ink to the printing roller, enabling printing on the substrate. The ink-dipping roller vibrates vertically in the ink tank to eliminate air bubbles. Simultaneously, the vibration direction of the ink-dipping roller is perpendicular to the contact area with the printing roller, achieving better adhesion of the effective ink to the printing roller.
5. The method of operating the gravure ink tank assembly according to claim 4, characterized in that: Excess ink on the printing roller is also scraped off with a doctor blade. The doctor blade acts on three points on the side of the printing roller and scrapes off the excess ink downwards. The three points on the side are the side of the printing roller that comes into contact with the ink-dipped roller.
6. The method of operating the gravure ink tank assembly according to claim 4, characterized in that: The printing roller receives the ink from the ink-dipping roller while vibrating, and the direction of the vibration is perpendicular to the contact area.
7. The method of operating the gravure ink tank assembly according to claim 4, characterized in that: The printing roller prints on the substrate by supplying ink while vibrating, and the direction of vibration is perpendicular to the surface of the substrate.