Water-based ink adjusting device for flexographic printing of corrugated board

Abstract

The invention discloses a corrugated board flexographic printing water-based ink adjusting device which comprises three ink tanks and further comprises an ink supply assembly, the ink supply assembly comprises a first telescopic motor, a pressing rod and a first pressing plate, the first telescopic motor is fixedly connected to a rack, the three first pressing plates are slidably connected into the three ink tanks correspondingly, and the pressing rod is fixedly connected to the rack; an output shaft of the first telescopic motor is linked with the three first pressing plates through three pressing rods; the adjusting assembly comprises a quantitative tank, second telescopic motors and first pistons, the two first pistons are connected into the quantitative tank in a sliding mode and divide the quantitative tank into three cavities, and output shafts of the two second telescopic motors are connected with the two first pistons correspondingly; and the stirring assembly is communicated with the three chambers of the quantitative tank. According to the color of the needed printing ink, the proportion needed by modulation of the three-primary-color printing ink is known, the volume proportion of three spaces in the quantifying tank is controlled through the second motor, and then the printing ink of different colors can be modulated through the device.

Description

Technical Field

[0001] The invention relates to a water-based ink regulating device for corrugated board flexographic printing. Background Art

[0002] Corrugated cardboard flexographic printing is a common printing technology suitable for printing on flexible materials such as corrugated cardboard. This printing technology uses special flexible plates and printing inks to achieve high-quality printing on corrugated cardboard.

[0003] The printing of corrugated cardboard requires the use of a variety of different colors of ink. Depending on the printing content, the amount of ink of different colors is different. However, it is difficult to estimate the required proportion of different colors of ink before the printing workload is completed. Therefore, it is necessary to prepare an excess of each color of ink, which ultimately results in different degrees of surplus of various colors of ink, resulting in a large amount of ink and capital waste. Therefore, a new type of ink adjustment device is needed to solve this problem. Summary of the invention

[0004] The present invention aims to solve the problems existing in the prior art and provides a water-based ink regulating device for flexographic printing of corrugated board.

[0005] The technical solutions adopted in the present invention are: A water-based ink regulating device for flexographic printing of corrugated paperboard, comprising a frame, three ink tanks are mounted on the frame, and further comprising: The ink supply assembly comprises a first telescopic motor, a pressure rod and a first pressure plate, wherein the first telescopic motor is fixedly connected to the frame, three first pressure plates are slidably connected to three ink tanks respectively, and the output shaft of the first telescopic motor is linked to the three first pressure plates through three pressure rods; The regulating assembly includes a quantitative tank, a second telescopic motor and a first piston. The two first pistons are slidably connected to the inside of the quantitative tank and divide the quantitative tank into three chambers. The output shafts of the two second telescopic motors are respectively connected to the two first pistons. The quantitative tank is respectively connected to the three chambers on the ink tank. A stirring assembly is connected with the three chambers of the quantitative tank.

[0006] Furthermore, the ink supply assembly also includes a spring and a second pressing plate. The three second pressing plates are slidably connected to the inside of the three ink tanks respectively. The top and bottom ends of the spring fix the first pressing plate and the second pressing plate respectively.

[0007] Furthermore, the air holes are formed on the tops of the first pressing plate and the ink tank.

[0008] Furthermore, the regulating assembly also includes a bottom tube and a four-way tube. The three ink tanks are connected to the three chambers through the three bottom tubes. The three branch pipe openings of the four-way tube are connected to the three chambers. The remaining main pipe openings are connected to the stirring assembly.

[0009] Furthermore, switch valves are provided in the bottom pipe and in the main pipe of the cross-way pipe.

[0010] Furthermore, the regulating assembly also includes an air intake pipe, a first one-way valve and a filter. The three air intake pipes are fixedly connected to the quantitative tank and are correspondingly connected to the three chambers. A first one-way valve and a filter are arranged in each air intake pipe, and the filter is located on the outside of the first one-way valve.

[0011] Furthermore, the stirring assembly includes a stirring tank, a third telescopic motor, a lifting column, a disc and a stirring rod. The third telescopic motor is arranged on the outside of the stirring tank, the lifting column is arranged on the inside of the stirring tank and is connected to the output shaft of the third telescopic motor, two discs are fixed on the lifting column, and multiple stirring rods are fixed between the two discs.

[0012] Furthermore, the stirring assembly also includes a fixed rod and a sliding pin, the fixed rod is fixed in the stirring tank, the lifting column is coaxially plugged into the fixed rod, the sliding pin is fixed to the fixed rod, an oblique ring groove is provided on the inner wall of the lifting column, and the sliding pin is slidably connected in the oblique ring groove.

[0013] Furthermore, the device also includes a discharge assembly, which includes a suction tank, a connecting pipe and a second one-way valve. One end of the connecting pipe extends into the stirring tank, and the other end is connected to the suction tank. The second one-way valve is connected to the connecting pipe.

[0014] Furthermore, the discharging assembly also includes a fourth telescopic motor, a second piston and a discharging pipe, the second piston is slidably arranged inside the suction tank, the output shaft of the fourth telescopic motor is connected to the second piston, and the discharging pipe is connected to the suction tank.

[0015] The present invention has the following beneficial effects: (1) The present invention can inject three different colors of ink, namely red, green and blue, into three ink tanks through three feeding pipes respectively. Red, green and blue are three primary colors. When the three colors of ink are mixed in different proportions, different colors of ink can be blended. Since the color accuracy of corrugated cardboard printing is not high, this method can be used to obtain inks of different colors. Therefore, only the three primary colors of ink need to be prepared to prepare inks of different colors. According to the required ink color, the mixing ratio of red ink, green ink and blue ink can be determined.

[0016] (2) The capacity of the quantitative tank is fixed, and the two first pistons can divide the space in the quantitative tank into three parts with different proportions, so as to be used to take out three colors of ink in different proportions. When the positions of the two first pistons are adjusted, the first motor is started, and the output shaft of the first motor extends to squeeze the ink in the three ink tanks into the quantitative tank. At this time, the three colors of ink are stored in the quantitative tank according to different proportions.

[0017] (3) When the two first pistons move to the sides respectively, the ink in the space on both sides can be squeezed into the four-way tube, and when the two first pistons move to the middle, the ink in the middle can be squeezed into the four-way tube. After the two first pistons move several times, the ink in the quantitative tank will be completely injected into the mixing tank through the four-way tube. In the process of reciprocating movement of the first pistons, air will be drawn from the outside through the air intake pipe, thereby squeezing the air into the four-way tube. The pushing of the air can reduce the ink remaining in the four-way tube and inject all the ink into the mixing tank as much as possible. A small hole is opened on the top of the mixing tank to discharge the excess air injected into the mixing tank.

[0018] (4) When all three colors of ink are injected into the mixing tank, the third motor is started, and the lifting column moves up and down, driving the disc and the stirring rod to move up and down. At the same time, during the up and down movement of the lifting column, the lifting column will rotate because the different limit rods need to be always kept in the inclined ring groove. Therefore, the stirring rod between the discs will rotate. Under the pressure of the disc, the ink will flip up and down between the disc and the inner wall of the mixing tank. At the same time, the rotating stirring rod will stir the ink, so that the three colors of ink are finally mixed to obtain the desired color of ink.

[0019] (5) After the ink is mixed in the stirring tank, the fourth motor can be started. The fourth motor drives the second piston to move. The second piston will form a negative pressure in the suction tank, and the ink will be pumped into the suction tank through the connecting tube. Then the second piston moves in the opposite direction, and the ink will be squeezed out from the discharge pipe again. According to the required color of the ink, the required ratio of the three primary colors of ink is known. The volume ratio of the three spaces in the quantitative tank is controlled by the second motor, and then the above modulation process is repeated. The device can be used to mix inks of different colors. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a three-dimensional structural schematic diagram of the present invention; Figure 2 The present invention Figure 1 Another perspective view shown; Figure 3 It is a cross-sectional view of the internal structure of the present invention; Figure 4 It is a cross-sectional view of the internal structure of the ink tank and the quantitative tank in the present invention; Figure 5 It is a cross-sectional view of the internal structure of the stirring tank and the suction tank in the present invention; Figure 6 It is an exploded view of the internal structure of the stirring tank in the present invention; Figure 7 It is a schematic diagram of the connection structure between the quantitative tank and the air intake pipe in the present invention.

[0021] 1. Frame; 2. Support rod; 3. Ink tank; 4. ink supply assembly; 41. feed pipe; 42. top cover; 43. first telescopic motor; 44. connecting plate; 45. pressure rod; 46. first pressure plate; 47. spring; 48. second pressure plate; 49. air hole; 5. Adjustment assembly; 51. Bottom pipe; 52. Dosing tank; 53. Second telescopic motor; 54. First piston; 55. Cross-way pipe; 56. Switch valve; 57. Air intake pipe; 58. First non-return valve; 59. Filter; 6. stirring assembly; 61. stirring tank; 62. third telescopic motor; 63. lifting column; 64. disc; 65. stirring rod; 66. fixing rod; 67. sliding pin; 68. oblique ring groove; 7. Discharging assembly; 71. Suction tank; 72. Fourth telescopic motor; 73. Second piston; 74. Connecting pipe; 75. Second one-way valve; 76. Discharging pipe. DETAILED DESCRIPTION

[0022] The present invention will be further described below in conjunction with the accompanying drawings.

[0023] like Figure 1-Figure 7 The present invention discloses a water-based ink regulating device for flexographic printing of corrugated paperboard, comprising a frame 1, a support rod 2 is fixedly connected to the frame 1, and three ink tanks 3 are fixedly connected to the support rod 2.

[0024] An ink supply assembly 4 is provided on the ink tank 3, and the ink supply assembly 4 includes a first telescopic motor 43, a connecting plate 44, a pressure rod 45 and a first pressure plate 46. The first telescopic motor 43 is fixedly connected to the frame 1, the connecting plate 44 is fixedly connected to the output shaft of the first telescopic motor 43, three pressure rods 45 are fixedly connected to the connecting plate 44, and three first pressure plates 46 are respectively slidably connected to the inside of the three ink tanks 3, and the three first pressure plates 46 are respectively fixedly connected to the three pressure rods 45.

[0025] The three ink tanks 3 are provided with an adjusting assembly 5, which includes a bottom pipe 51, a quantitative tank 52, a second telescopic motor 53 and a first piston 54. The two first pistons 54 are slidably connected to the inside of the quantitative tank 52, and divide the quantitative tank 52 into three chambers. The output shafts of the two second telescopic motors 53 are respectively connected to the two first pistons 54, and the quantitative tank 52 is respectively connected to the three chambers on the ink tank 3; the three bottom tubes 51 are respectively fixedly connected to the bottoms of the three ink tanks 3, and the three bottom tubes 51 are respectively connected to the three chambers on the ink tank 3.

[0026] The frame 1 is provided with a stirring assembly 6 and a discharging assembly 7 . The stirring assembly 6 is connected to the adjusting assembly 5 , and the discharging assembly 7 is connected to the stirring assembly 6 .

[0027] The ink supply assembly 4 also includes a feed pipe 41 and a top cover 42. The three feed pipes 41 are fixedly connected to the three ink tanks 3 respectively, and the three top covers 42 are threadedly connected to the three feed pipes 41 respectively. The three different colors of ink, namely red, green and blue, are respectively injected into the three ink tanks 3 through the three feed pipes 41. Red, green and blue are the three primary colors. When the three colors of ink are mixed in different proportions, different colors of ink can be blended. Since the color accuracy of corrugated cardboard printing is not high, this method can be used to obtain inks of different colors.

[0028] The ink supply assembly 4 also includes a spring 47, a second pressure plate 48 and an air hole 49. The three second pressure plates 48 are respectively slidably connected to the inside of the three ink tanks 3. The three springs 47 are respectively fixedly connected between the three first pressure plates 46 and the three second pressure plates 48. The tops of the three first pressure plates 46 and the three ink tanks 3 are all provided with air holes 49. The output shaft of the first telescopic motor 43 is extended downward for a long distance, so that the first pressure plate 46 can move downward, and then the three second pressure plates 48 can move downward and squeeze a sufficient amount of ink into the quantitative tank 52. Since the volumes of the three spaces in the quantitative tank 52 are different, the three springs 47 will be in a compression state to different degrees.

[0029] The regulating assembly 5 further includes a four-way pipe 55 and a switch valve 56. The four-way pipe 55 is fixedly connected to the bottom of the quantitative tank 52. The three branch pipe openings of the four-way pipe 55 are connected to the three chambers of the quantitative tank 52, and the remaining main pipe openings are connected to the stirring assembly 6. The four switch valves 56 are respectively fixedly connected to the inside of the three bottom pipes 51 and the main pipe of the four-way pipe 55. The actual inner diameter of the four-way pipe 55 is small, which can avoid a large error in the proportion of ink stored in the four-way pipe 55. Since the printing of corrugated cardboard does not require high color accuracy, the small error can be ignored.

[0030] The regulating assembly 5 also includes an air intake pipe 57, a first one-way valve 58 and a filter screen 59. The three air intake pipes 57 are fixedly connected to the quantitative tank 52. The three first one-way valves 58 are respectively fixedly connected to the inside of the three air intake pipes 57. The three filter screens 59 are respectively fixedly connected to the inside of the three air intake pipes 57. When the two first pistons 54 move toward the two sides respectively, the ink in the space on both sides can be squeezed into the four-way tube 55. When the two first pistons 54 move toward the middle, the ink in the middle can be squeezed into the four-way tube 55. After the two first pistons 54 move several times, the ink in the quantitative tank 52 will be completely injected into the stirring tank 61 through the four-way tube 55. In the process of the reciprocating movement of the first piston 54, air will be drawn from the outside through the air intake pipe 57, thereby squeezing the air into the four-way tube 55. The pushing of the air can reduce the ink remaining in the four-way tube 55.

[0031] The stirring assembly 6 includes a stirring tank 61, a third telescopic motor 62, a lifting column 63, a disc 64 and a stirring rod 65. The stirring tank 61 is fixedly connected to the frame 1, the stirring tank 61 is fixedly connected to one end of the four-way pipe 55, the third telescopic motor 62 is fixedly connected to the top of the stirring tank 61, the lifting column 63 is rotatably connected to the output shaft of the third telescopic motor 62, two discs 64 are fixedly connected to the lifting column 63, and a plurality of stirring rods 65 are fixedly connected between the two discs 64. When the disc 64 moves up and down, the ink will be squeezed by the disc 64 and flipped up and down in the gap between the disc 64 and the inner wall of the stirring tank 61. At the same time, the rotating stirring rod 65 will stir the ink, so that the three colors of ink are finally mixed to obtain the desired color of ink.

[0032] The stirring assembly 6 also includes a fixed rod 66, a sliding pin 67 and an oblique annular groove 68. The fixed rod 66 is fixedly connected to the bottom inner wall of the stirring tank 61, the sliding pin 67 is fixedly connected to the fixed rod 66, the oblique annular groove 68 is opened on the inner wall of the lifting column 63, and the sliding pin 67 is slidably connected to the inside of the oblique annular groove 68. Since the sliding pins 67 fixed differently need to always remain in the oblique annular groove 68, the lifting column 63 will rotate at the same time when moving up and down, so the stirring rod 65 between the discs 64 will rotate.

[0033] The discharging assembly 7 includes a suction tank 71, a connecting pipe 74 and a second one-way valve 75. The connecting pipe 74 is fixedly connected to the stirring tank 61. The suction tank 71 is fixedly connected to the connecting pipe 74. The second one-way valve 75 is fixedly connected to the inside of the connecting pipe 74. One end of the connecting pipe 74 is located inside the stirring tank 61, close to the bottom inner wall of the stirring tank 61.

[0034] The discharge assembly 7 also includes a fourth telescopic motor 72, a second piston 73 and a discharge pipe 76. The fourth telescopic motor 72 is fixedly connected to the frame 1, the second piston 73 is slidably connected to the inside of the suction tank 71, the output shaft of the fourth telescopic motor 72 is fixedly connected to the second piston 73, and the discharge pipe 76 is fixedly connected to the suction tank 71. The suction tank 71 can use negative pressure to extract the prepared ink in the stirring tank 61 and then discharge it from the discharge pipe 76.

[0035] First, three different colors of ink, red, green and blue, are injected into three ink tanks 3 through three feeding pipes 41 respectively. Red, green and blue are three primary colors. When the three colors of ink are mixed in different proportions, different colors of ink can be blended. Since the color accuracy of corrugated cardboard printing is not high, this method can be used to obtain inks of different colors. Therefore, only three primary colors of ink need to be prepared to prepare inks of different colors. According to the required ink color, the mixing ratio of red ink, green ink and blue ink is determined, and then the two second telescopic motors 53 are started. After the two second telescopic motors 53 are started, the two first pistons 54 can be controlled to slide in the quantitative tank 52. The capacity in the quantitative tank 52 is fixed, and the two first pistons 54 can divide the space in the quantitative tank 52 into three parts with different proportions, so as to be used to take the three kinds of ink in different proportions. When the positions of the two first pistons 54 are adjusted, the first telescopic motor 43 is started, and the output shaft of the first telescopic motor 43 is extended to move the connecting plate 44 and the three pressure rods 45 downward, driving the three first pressure plates 46 to move downward, and the first pressure plate 46 will press the three second pressure plates 48 downward through the spring 47, and at the same time open the switch valves 56 in the three bottom tubes 51, so that the ink in the three ink tanks 3 is squeezed into the quantitative tank 52. The actual inner diameter of the four-way tube 55 is very small, and the ink entering the four-way tube 55 can be ignored. Since the space in the quantitative tank 52 is divided into three parts by the two first pistons 54, the output shaft of the first telescopic motor 43 can be extended downward for a long distance to ensure that the three second pressure plates 48 can squeeze a sufficient amount of ink into the quantitative tank 52. Since the three spaces in the quantitative tank 52 have different volumes, the three springs 47 will be in different degrees of compression.

[0036] At this time, the switch valves 56 in the three bottom tubes 51 are closed, the switch valve 56 in the four-way tube 55 is opened, and the two second telescopic motors 53 are started again, so that the output shafts of the two second telescopic motors 53 move back and forth, driving the two first pistons 54 to move. When the two first pistons 54 move toward the two sides respectively, the ink in the space on both sides can be squeezed into the four-way tube 55, and when the two first pistons 54 move toward the middle, the ink in the middle can be squeezed into the four-way tube 55. After the two first pistons 54 move several times, the ink in the quantitative tank 52 will be completely injected into the stirring tank 61 through the four-way tube 55. In the process of the reciprocating movement of the first piston 54, air will be drawn from the outside through the air intake pipe 57, so that the air is also squeezed into the four-way tube 55. The pushing of the air can reduce the ink remaining in the four-way tube 55, and all the ink can be injected into the stirring tank 61 as much as possible. A small hole is opened on the top of the stirring tank 61 to discharge the excess air injected into the stirring tank 61.

[0037] When all three colors of ink are injected into the stirring tank 61, the third telescopic motor 62 is started, and the lifting column 63 moves up and down, driving the disc 64 and the stirring rod 65 to move up and down. At the same time, during the up and down movement of the lifting column 63, since the sliding pins 67 fixed differently need to be kept in the oblique ring groove 68 at all times, the lifting column 63 will rotate, so the stirring rod 65 between the discs 64 will rotate. The size of the disc 64 is smaller than the inner diameter of the stirring tank 61. Therefore, when the disc 64 located below moves up and down, the ink will be squeezed by the disc 64 and flipped up and down between the disc 64 and the inner wall of the stirring tank 61. At the same time, the rotating stirring rod 65 will stir the ink, so that the three colors of ink are finally mixed to obtain the required color of ink. At this time, the fourth telescopic motor 72 is started, and the fourth telescopic motor 72 drives the second piston 73 to move. The second piston 73 will form a negative pressure in the suction tank 71, and the ink is sucked into the suction tank 71 by the connecting pipe 74. Then the second piston 73 moves in the opposite direction, and the ink will be squeezed out from the discharge pipe 76 again.

[0038] According to the required color of the ink, the required ratio of the three primary color inks is known, and the volume ratio of the three spaces in the quantitative tank 52 is controlled by the second telescopic motor 53, and then the above modulation process is repeated, and the device can be used to modulate inks of different colors.

[0039] The above description is only a preferred embodiment of the present invention. It should be pointed out that a person skilled in the art can make several improvements without departing from the principle of the present invention, and these improvements should also be regarded as within the protection scope of the present invention.

Claims

1. A water-based ink regulating device for flexographic printing of corrugated cardboard, comprising a frame (1), on which three ink tanks (3) are mounted, characterized in that: Also includes: An ink supply assembly (4), comprising a first telescopic motor (43), a pressure rod (45) and a first pressure plate (46), wherein the first telescopic motor (43) is fixedly connected to the frame (1), and three first pressure plates (46) are slidably connected to three ink tanks (3), respectively, and an output shaft of the first telescopic motor (43) is linked to the three first pressure plates (46) via three pressure rods (45); An adjusting assembly (5) comprises a quantitative tank (52), a second telescopic motor (53) and a first piston (54), wherein the two first pistons (54) are slidably connected to the inside of the quantitative tank (52) and divide the quantitative tank (52) into three chambers, the output shafts of the two second telescopic motors (53) are respectively connected to the two first pistons (54), and the quantitative tank (52) is respectively connected to the three chambers on the ink tank (3); A stirring assembly (6), wherein the stirring assembly (6) is in communication with the three chambers of the quantitative tank (52).

2. The water-based ink regulating device for corrugated board flexographic printing according to claim 1, characterized in that: The ink supply assembly (4) further comprises a spring (47) and a second pressure plate (48). The three second pressure plates (48) are respectively slidably connected to the inside of the three ink tanks (3). The top and bottom ends of the spring (47) respectively fix the first pressure plate (46) and the second pressure plate (48).

3. The water-based ink regulating device for corrugated board flexographic printing according to claim 2, characterized in that: The first pressing plate (46) and the top of the ink tank (3) are both provided with the air hole (49).

4. The water-based ink regulating device for corrugated board flexographic printing according to claim 1, characterized in that: The regulating assembly (5) further comprises a bottom tube (51) and a four-way tube (55); the three ink tanks (3) are connected to the three chambers via the three bottom tubes (51); the three branch pipe openings of the four-way tube (55) are connected to the three chambers; and the remaining main pipe openings are connected to the stirring assembly (6).

5. The water-based ink regulating device for corrugated board flexographic printing as claimed in claim 4, characterized in that: Switch valves (56) are provided in the bottom pipe (51) and in the main pipe of the cross-way pipe (55).

6. The water-based ink regulating device for corrugated board flexographic printing according to claim 1, characterized in that: The regulating assembly (5) further comprises an air intake pipe (57), a first one-way valve (58) and a filter screen (59); the three air intake pipes (57) are fixedly connected to the quantitative tank (52) and are correspondingly connected to the three chambers; the first one-way valve (58) and the filter screen (59) are arranged in each air intake pipe (57), and the filter screen (59) is located outside the first one-way valve (58).

7. The water-based ink regulating device for corrugated board flexographic printing according to claim 1, characterized in that: The stirring assembly (6) comprises a stirring pot (61), a third telescopic motor (62), a lifting column (63), a disc (64) and a stirring rod (65); the third telescopic motor (62) is arranged outside the stirring pot (61); the lifting column (63) is arranged inside the stirring pot (61) and is connected to an output shaft of the third telescopic motor (62); two discs (64) are fixed on the lifting column (63); and a plurality of stirring rods (65) are fixed between the two discs (64).

8. The water-based ink regulating device for flexographic printing of corrugated board according to claim 7, characterized in that: The stirring assembly (6) further comprises a fixed rod (66) and a sliding pin (67); the fixed rod (66) is fixed in the stirring tank (61); the lifting column (63) is coaxially plugged into the fixed rod (66); the sliding pin (67) is fixed to the fixed rod (66); an oblique annular groove (68) is provided on the inner wall of the lifting column (63); and the sliding pin (67) is slidably connected in the oblique annular groove (68).

9. The water-based ink regulating device for flexographic printing of corrugated board according to claim 7, characterized in that: The device further comprises a discharge assembly (7), the discharge assembly (7) comprising a suction tank (71), a connecting pipe (74) and a second one-way valve (75), one end of the connecting pipe (74) extending into the stirring tank (61), and the other end communicating with the suction tank (71), and the second one-way valve (75) being connected to the connecting pipe (74).

10. The water-based ink regulating device for flexographic printing of corrugated board according to claim 9, characterized in that: The discharge assembly (7) further comprises a fourth telescopic motor (72), a second piston (73) and a discharge pipe (76); the second piston (73) is slidably disposed inside the suction tank (71); the output shaft of the fourth telescopic motor (72) is connected to the second piston (73); and the discharge pipe (76) is connected to the suction tank (71).

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