Color mixing device for printing

Abstract

The invention relates to the technical field of printing equipment, in particular to a color mixing device for printing, which comprises a rack, a printing roller and a pressing roller are rotatably connected to the rack, and the printing roller comprises a rotating shaft rotatably connected to the rack and a plurality of independent debugging rollers arranged on the rotating shaft at intervals in the axial direction; the rotating shaft is parallel to the printing roller; the rack is provided with a containing box located on the lower side of the rotating shaft, a plurality of partition plates are arranged in the containing box in the length direction of the rotating shaft, an inner cavity of the containing box is divided into debugging cavities corresponding to the debugging rollers through the partition plates, and an expansion assembly with the volume changing capacity is arranged in each debugging cavity. And the liquid level height in the debugging cavity is adjusted. The device has the following beneficial effects that the actual printing effect of the ink is judged according to the printing effect of the printed matter, and a plurality of debugging proportions can be formed through the debugging cavities, so that a debugging result can be obtained more quickly.

Description

Technical Field

[0001] The present application relates to the technical field of printing equipment, and in particular to a color mixing device for printing. Background Art

[0002] Gravure printing is a printing technique characterized by the image portion of the printing plate being lower than the blank area. Printing is achieved by engraving depressions in the plate, filling them with ink, and then transferring the ink to the substrate through pressure. Gravure printing is defined as a printing method in which the image portion of the plate is lower than the non-image portion. Gravure printing offers advantages such as a thick ink layer, vibrant colors, high color saturation, a high plate run rate, and consistent print quality. It is suitable for high-quality, high-volume printed products such as banknotes, stamps, magazines, and packaging materials. Gravure printing platemaking methods include hand engraving, mechanical engraving, electronic engraving, and etching.

[0003] Before formal printing, it is usually necessary to perform color adjustment and conduct trial printing with various ink ratios to form a preliminary printing effect. However, it is often the case that the color is incorrect during the first few times, and the ink needs to be readjusted, which requires stopping the machine for debugging, which is quite troublesome. Summary of the Invention

[0004] In order to perform pre-printing operations in advance and thus improve production efficiency, the present application provides a color mixing device for printing.

[0005] The present application provides a printing color tinting device, which adopts the following technical solution: a printing color tinting device, comprising a frame, a printing roller and a pressure roller being rotatably connected to the frame, the printing roller comprising a rotating shaft rotatably connected to the frame, and a plurality of separate adjustment rollers axially spaced apart from the rotating shaft, wherein the rotating shaft is parallel to the printing roller; The frame is provided with a containing box located on the lower side of the rotating shaft, and a plurality of partition plates are provided in the containing box along the length direction of the rotating shaft. The partition plates divide the inner cavity of the containing box into debugging cavities corresponding to the debugging rollers. Each debugging cavity is provided with an expansion component with volume change capability for adjusting the liquid level in the debugging cavity.

[0006] By adopting the above technical solution, a printing roller and a pressure roller are arranged on the frame, and the printing roller contacts the pre-adjusted ink in the accommodating box. Then the printing material passes between the printing roller and the pressure roller to form a pre-printed product. The actual printing effect of the ink is judged by the printing effect of the printed product, and multiple debugging ratios can be formed through multiple debugging chambers to facilitate faster acquisition of debugging results. In addition, there is no need to add too much ink during the printing process. The ink in the debugging chamber is maintained at an appropriate liquid level through the expansion component, which also reduces the waste of ink.

[0007] Preferably, there is a gap between the plurality of debugging rollers for the upper side of the partition plate to be embedded, and the lower side of each debugging roller is individually immersed in the corresponding debugging cavity.

[0008] Preferably, the expansion assembly includes a plurality of airbags spaced apart in the debugging cavity, and an inflatable member disposed in the accommodating box and used for inflating the airbags, and the plurality of airbags are expanded or contracted simultaneously.

[0009] By adopting the above technical solution, the volume of the airbag is increased through the inflatable part, thereby increasing the volume of the non-liquid in the debugging chamber, causing the ink liquid level to rise. Multiple airbags can form multi-stage adjustment and will not be limited by the deformation range of a single airbag.

[0010] Preferably, the expansion assembly further comprises a connecting tube horizontally arranged in the accommodating cavity, the inflatable member is connected to the connecting tube, and the plurality of airbags are individually connected to the same connecting tube.

[0011] By adopting the above technical solution, the inflatable member fills the gas into the connecting tube, and distributes the gas to each airbag through the connecting tube.

[0012] Preferably, a blocking plate is provided in the debugging chamber and on the upper side of the airbag, and the blocking plate is used to limit the travel of the airbag in a direction perpendicular to the bottom of the debugging chamber.

[0013] By adopting the above technical solution, since the original intention of the debugging stage is to save ink liquid, the liquid level depth in the debugging chamber is not high, so the deformation stroke of the airbag is limited in the vertical direction, and the deformation stroke of the airbag in the horizontal radial direction is increased, which can avoid interference with the debugging roller.

[0014] Preferably, a return spring is provided in the airbag and is perpendicular to the bottom of the debugging cavity.

[0015] By adopting the above technical solution, when the airbag is initially deformed, the action of the return spring is overcome by the action of the air pressure, so that the whole airbag is deformed in the vertical and horizontal directions. After the air pressure is released later, the return spring can rely on the restoring force to restore the airbag to its original state for subsequent operation.

[0016] Preferably, the connecting tube has a connecting hole connected to the airbag, and the inner wall of the connecting tube has a telescopic guide rod passing through the connecting hole and penetrating into the return spring.

[0017] By adopting the above technical solution, the telescopic guide rod will be extended and retracted along with the deformation of the return spring, and the telescopic guide rod can maintain an overall vertical state to prevent the spring from being skewed.

[0018] Preferably, when the reset spring is retracted, there is an initial inflation space between the outer wall of the telescopic guide rod and the reset spring.

[0019] By using the above technical solution, when the connecting pipe is not filled with gas, the hydraulic pressure from the outside will act on the air bag, and the initial inflation space between the telescopic guide rod and the reset spring inside the air bag can provide a good deformation reservation space when the gas is first filled.

[0020] Preferably, the side of the air bag close to the blocking plate is provided with a linkage plate parallel to the blocking plate, and the end of the telescopic guide rod is connected to the linkage plate. As the gas in the air bag increases, the linkage plate contacts the blocking plate, and then the air bag only has a deformation stroke of expanding radially outward.

[0021] Preferably, the side of the linkage plate close to the blocking plate is provided with a plurality of limiting protrusions to realize point contact with the blocking plate.

[0022] By using the above technical solution, the connection relationship between the telescopic guide rod, the reset spring and the linkage plate is all located in the air bag and will not be in contact with the ink liquid, so as to avoid the adhesion between components caused by the ink liquid in the color adjusting cavity, and facilitate the repeated movement of the air bag structure.

[0023] In summary, the present application has at least one of the following beneficial technical effects: 1. The printing roller and the pressure roller are arranged on the rack, the printing roller is in contact with the pre-adjusted ink liquid in the containing box, and then the printing material passes between the printing roller and the pressure roller to form a pre-printed product. The actual printing effect of the ink liquid is determined by the printing effect of the printed product, and multiple adjustment ratios can be formed by multiple adjustment cavities to obtain adjustment results faster. In the printing process, excessive ink liquid does not need to be added, the ink liquid in the adjustment cavity is maintained at a suitable liquid level by the expansion assembly, and the waste of ink liquid is reduced. 2. Since the initial intention of the adjustment stage is to save ink liquid, the liquid level depth in the adjustment cavity is not high, the deformation stroke of the air bag in the vertical direction is limited, and the deformation stroke of the air bag in the horizontal radial direction is increased, so as to avoid interference with the adjustment roller. 3. The connection relationship between the telescopic guide rod, the reset spring and the linkage plate is all located in the air bag and will not be in contact with the ink liquid, so as to avoid the adhesion between components caused by the ink liquid in the color adjusting cavity, and facilitate the repeated movement of the air bag structure. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 is a structural schematic diagram of the present application; Figure 2 is a structural schematic diagram of the printing roller; Figure 3 is a schematic view of the structure in the accommodating box after hiding the printing roller; Figure 4 is a schematic view of the internal structure of the air bag in the inflated state; Figure 5 is a schematic view of the internal structure of the air bag in the initial state of the reset spring and the state of not adding ink liquid in the accommodating box.

[0025] The reference signs are as follows: 100, frame; 110, printing roller; 111, pressing roller; 112, rotating shaft; 113, debugging roller; 114, accommodating box; 115, partition plate; 116, debugging cavity; 120, scraper; 121, vertical plate; 122, air bag; 123, connecting pipe; 124, communication hole; 125, reset spring; 126, telescopic guide rod; 130, blocking plate; 131, linkage plate; 132, sleeve section; 133, solid section; 134, limiting protrusion; 135, initial inflation space. DETAILED DESCRIPTION

[0026] The application will be further described in detail below with reference to the accompanying drawings.

[0027] The embodiment of the application discloses a printing color adjusting device, referring to Figure 1 , Figure 2 , comprising a frame 100, the frame 100 is rotatably connected with a printing roller 110 and a pressing roller 111, the printing roller 110 and the pressing roller 111 have a gap for material movement, the printing roller 110 comprises a rotating shaft 112 rotatably connected to the frame 100, a plurality of separate debugging rollers 113 are arranged along the axial direction of the rotating shaft 112, and the rotating shaft 112 is parallel to the printing roller 110. The frame 100 is respectively provided with a driving motor connected to the pressing roller 111 and the rotating shaft 112.

[0028] The frame 100 is provided with an accommodating box 114 located at the lower side of the rotating shaft 112, a plurality of partition plates 115 are arranged in the length direction of the rotating shaft 112 in the accommodating box 114, the partition plates 115 divide the inner cavity of the accommodating box 114 into debugging cavities 116 corresponding to the debugging rollers 113, and an expansion assembly with volume change capability is arranged in each debugging cavity 116 and used for adjusting the liquid level in the debugging cavity 116.

[0029] In the embodiment, the debugging roller 113 is provided with three debugging cavities 116, and three pre-adjusted color ratios can be tested at the same time.

[0030] In order to avoid interference between adjacent colors, gaps are provided between the plurality of adjusting rollers 113 for the upper side of the partition plate 115 to be embedded, and the lower side of each adjusting roller 113 is separately immersed into the corresponding adjusting cavity 116. Three separate doctor blades 120 structures are provided on the side wall of the accommodating box 114, and vertical plates 121 are provided on the side wall of the accommodating box 114 to separate adjacent doctor blades 120, so that the scraped ink liquid can be independently returned to the corresponding adjusting cavity 116 to avoid interference.

[0031] Referring to Figure 3 , Figure 4 , the expansion assembly includes a plurality of air bags 122 arranged at intervals in the adjusting cavity 116, an air charging member arranged in the accommodating box 114 and used for charging air into the air bag 122, and a connecting pipe 123 arranged horizontally in the accommodating cavity. The plurality of air bags 122 are simultaneously expanded or contracted. In the embodiment, one air bag 122 is arranged in each adjusting cavity 116, and a plurality of air bags 122 can also be arranged in a single adjusting cavity 116 in order to improve the liquid level change capability of the single adjusting cavity 116. In the embodiment, the air bags 122 in the plurality of adjusting cavities 116 are simultaneously expanded or contracted. The air charging member is a gas pump (not shown in the figure) in the embodiment, which is connected to the connecting pipe 123 and used for charging air into the connecting pipe 123. A plurality of communication holes 124 are provided on the connecting pipe 123 along the length direction of the connecting pipe 123, each communication hole 124 corresponds to one air bag 122, and the center of the communication hole 124 corresponds to the center axis of the air bag 122.

[0032] Referring to Figure 4 , Figure 5 , a reset spring 125 is arranged in the air bag 122 along the direction perpendicular to the bottom of the adjusting cavity 116, and the inner wall of the connecting pipe 123 has a telescopic guide rod 126 passing through the communication hole 124 and arranged in the reset spring 125. A blocking plate 130 is arranged in the adjusting cavity 116 and located on the upper side of the air bag 122, which is used to limit the travel of the air bag 122 in the direction perpendicular to the bottom of the adjusting cavity 116. When the air bag 122 is deformed upward to a certain stage, it will only be radially deformed and will not occupy too much space in the vertical direction, so that stable printing adjustment can be achieved by using a small amount of ink liquid.

[0033] A linkage plate 131, parallel to the barrier plate 130, is provided on the side of the airbag 122 near the barrier plate 130. The end of the telescopic guide rod 126 is connected to the linkage plate 131. As gas is introduced into the connecting tube 123, the airbag 122 continuously enters and expands. Initially, the airbag 122 deforms both vertically and horizontally, stretching the return spring 125 and lengthening the telescopic guide rod 126. Because the linkage plate 131 is made of a rigid material, it moves horizontally without bending, facilitating subsequent alignment and contact with the barrier plate 130. As the telescopic guide rod 126 continues to lengthen, the linkage plate 131 eventually contacts the barrier plate 130. At this point, the airbag 122 deforms only radially. The continued inflow of gas causes the overall volume of the airbag 122 to increase, thereby raising the liquid level. In this embodiment, the connecting tubes 123 in the three debugging chambers 116 are partially inflated by the same inflatable piece. In other embodiments, the connecting tubes 123 in the debugging chamber 116 can also be connected separately by multiple inflatable pieces to achieve different page height differences in the debugging chamber 116 and improve adaptability.

[0034] In this embodiment, the telescopic guide rod 126 comprises a sleeve section 132 connected to the linkage plate 131 and a solid section 133 slidably disposed within the sleeve section 132. The solid section 133 passes through the connecting hole 124 and is fixedly connected to the inner wall of the connecting tube 123. When the connecting tube 123 is not inflated, the return spring 125 is compressed. Generally, when there is no ink in the adjustment chamber 116, the return spring 125 initially has a gap between its wires. When ink is injected, the return spring 125 is compressed due to the pressure. When the return spring 125 retracts, the gap between its wires is minimal. However, an initial inflation space 135 exists between the outer wall of the telescopic guide rod 126 and the return spring 125. When the liquid level needs to be adjusted, the airbag 122 can be smoothly inflated from the inside out through the initial inflation space 135, and the direction of expansion is determined.

[0035] Since contact with ink can cause adhesion between components, in this embodiment, the connections between the telescopic guide rod 126, return spring 125, and linkage plate 131 are all located within the airbag 122 and shielded from ink. This prevents adhesion between components caused by ink within the color mixing chamber, facilitating repeated movement of the airbag 122. Since the linkage plate 131 will eventually come into contact with the blocking plate 130, and to prevent adhesion, in this embodiment, a number of stopper bumps 134 are provided on the side of the linkage plate 131 near the blocking plate 130 to achieve point contact with the blocking plate 130.

[0036] The embodiments of this specific implementation method are all preferred embodiments of the present application and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A color mixing device for printing, comprising a frame (100), characterized in that: A printing roller (110) and a pressing roller (111) are rotatably connected to the frame (100), the printing roller (110) comprising a rotating shaft (112) rotatably connected to the frame (100), and a plurality of separate debugging rollers (113) axially spaced apart from the rotating shaft (112), wherein the rotating shaft (112) is parallel to the printing roller (110); The frame (100) is provided with a accommodating box (114) located at the lower side of the rotating shaft (112), and a plurality of partition plates (115) are provided in the accommodating box (114) along the length direction of the rotating shaft (112). The partition plates (115) divide the inner cavity of the accommodating box (114) into debugging cavities (116) corresponding to the debugging rollers (113), and each debugging cavity (116) is provided with an expansion component with a volume change capability for adjusting the liquid level in the debugging cavity (116).

2. A printing color mixing device according to claim 1, characterized in that: There is a gap between the plurality of debugging rollers (113) for the upper side of the partition plate (115) to be embedded, and the lower side of each debugging roller (113) is individually immersed in the corresponding debugging cavity (116).

3. A color mixing device for printing according to claim 2, characterized in that: The expansion assembly comprises a plurality of air bags (122) spaced apart in the debugging chamber (116), and an inflatable member disposed in the accommodating box (114) and used for inflating the air bags (122). The plurality of air bags (122) are expanded or contracted simultaneously.

4. A color mixing device for printing according to claim 3, characterized in that: The expansion assembly further comprises a connecting pipe (123) horizontally arranged in the accommodating cavity, the inflatable member is connected to the connecting pipe (123), and a plurality of the air bags (122) are individually connected to the same connecting pipe (123).

5. A color mixing device for printing according to claim 4, characterized in that: A blocking plate (130) is provided in the debugging chamber (116) and on the upper side of the airbag (122), and the blocking plate (130) is used to limit the travel of the airbag (122) in a direction perpendicular to the bottom of the debugging chamber (116).

6. A color mixing device for printing according to claim 5, characterized in that: A return spring (125) is provided in the air bag (122) and is perpendicular to the bottom of the debugging cavity (116).

7. A color mixing device for printing according to claim 6, characterized in that: The connecting tube (123) has a connecting hole (124) connected to the airbag (122), and the inner wall of the connecting tube (123) has a telescopic guide rod (126) passing through the connecting hole (124) and inserted into the return spring (125).

8. A color mixing device for printing according to claim 7, characterized in that: When the return spring (125) retracts, an initial air-filled space (135) exists between the outer wall of the telescopic guide rod (126) and the return spring (125).

9. A color mixing device for printing according to claim 8, characterized in that: A linkage plate (131) parallel to the blocking plate (130) is provided on one side of the airbag (122) close to the blocking plate (130), and the end of the telescopic guide rod (126) is connected to the linkage plate (131). As the gas in the airbag (122) increases, the linkage plate (131) contacts the blocking plate (130), and then the airbag (122) only has a deformation stroke that expands radially outward.

10. A color mixing device for printing according to claim 9, characterized in that: A plurality of limiting protrusions (134) are provided on one side of the linkage plate (131) close to the blocking plate (130) to achieve point contact with the blocking plate (130).

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