Automatic ink color matching device and printing ink detection method thereof

Abstract

The invention discloses an automatic ink color matching device and a printing ink detection method thereof.The automatic ink color matching device comprises a box body, a moving device, a feeding device, a control device and a detection device.The moving device is arranged in the middle of the box body and comprises a guide rail, a sliding block installed on the guide rail in a sliding mode and a first driving device driving the sliding block to move; the sliding block is provided with a detachably-arranged printing ink barrel, the feeding device is arranged at the front end of the moving device, the feeding device is composed of a plurality of mother bottles and a pump body, the pump body and the mother bottles are integrally arranged or separately arranged, the feeding device is detachably installed below the moving device, and the pump body conveys printing ink color masterbatch to the printing ink barrel through a guide pipe. The detection device is used for detecting the color of the ink in the ink barrel and judging whether the color meets the preset requirement or not. The problem of a traditional single mechanism is solved through the moving device, automatic color blending is facilitated, color blending is simpler, and color adjustment can be achieved in real time through the detection device.

Description

Technical Field

[0001] The invention relates to the field of ink color matching equipment, and in particular to an automatic ink color matching device and a printing ink detection method thereof. Background Art

[0002] In the printing of cigarette labels, the printing ink involves several requirements such as color, weather resistance and anti-counterfeiting. However, the existing ink adjustment has the following problems: 1. It cannot realize automatic color adjustment, and can only be added or reduced according to the formula or fixed amount of ink; 2. It can only be compared with the color of the raw material through the color card, and there is no perfect color inspection standard; 3. Color adjustment is mainly adjusted manually, so the ink needs to be tested before printing, that is, some pigment is taken for smearing or printing before adjustment; 4. Due to the anti-counterfeiting and weather resistance requirements of cigarette labels, the pigment also needs to be adjusted in color (existing cigarette labels generally have laser gloss), so it is easy to have errors in naked eye inspection, so the inspection accuracy is poor. Summary of the invention

[0003] The main purpose of the present invention is to propose an automatic ink color mixing device and a printing ink detection method thereof, aiming to achieve ink mixing through the automatic color mixing device. At the same time, through the predetermined color parameters, the color can be adjusted and a database can be formed to achieve automatic mixing.

[0004] To achieve the above object, the present invention provides an automatic ink color adjustment device, comprising:

[0005] Box;

[0006] A moving device, the moving device is arranged in the middle of the box body, the moving device comprises a guide rail, a slider slidably mounted on the guide rail, and a first driving device driving the slider to move, the slider is provided with a detachable ink barrel;

[0007] A feeding device is arranged at the front end of the mobile device. The feeding device is composed of a plurality of mother bottles and a pump body which is integrally or separately arranged with the mother bottles. The feeding device can be detachably installed at the lower position of the mobile device.

[0008] The pump body transports the ink masterbatch to the ink barrel through the conduit;

[0009] A control device, the control device is used to control the ink masterbatch delivery amount of each pump body;

[0010] A stirring device, wherein the stirring device is provided at the middle position of the moving device, and when a predetermined amount of each masterbatch is delivered to the ink barrel, the slider drives the ink barrel to move to the position of the stirring device, and the stirring device is used to stir the ink in the ink barrel;

[0011] The detection device is used to detect the ink color of the ink barrel and determine whether it meets the predetermined requirements.

[0012] In the existing automatic ink color matching device, an ink barrel and a stirring device are generally used as a whole, and then a predetermined amount of ink is taken out for color matching, which has color difference, so there is a slight difference in color, which is why people occasionally find the color difference of cigarette labels when using them;

[0013] The mobile device has changed the problems of the traditional single mechanism, facilitated the automatic color matching, and made color matching simpler. The color adjustment can be achieved in real time through the detection device, effectively improving the color consistency accuracy of the ink color. The structure is simple and stable. Although the structure is simple, the color matching is simpler, and the box can be dark. The technical solution of the present invention is in.

[0014] A printing ink detection method, characterized by comprising the above-mentioned automatic ink color adjustment device;

[0015] S1: The moving device drives the ink barrel to pass through the feeding device, stirring device and detection device in sequence;

[0016] S2: The control device controls each mother bottle of the feeding device to deliver a predetermined amount of ink into the ink barrel;

[0017] S3: The stirring device stirs the ink in the ink barrel to a predetermined mixing degree;

[0018] S4: The detection device detects the ink color of the ink barrel and determines whether it meets the predetermined requirements; when the detection does not meet the predetermined requirements, the moving device drives the ink barrel to move to the feeding device, and the control device controls the pump body to add the predetermined ink masterbatch, and then moves to the stirring device.

[0019] The detection methods in S4 include:

[0020] ① The ink barrel and the detection device are located in a dark environment without external light;

[0021] ②Detection includes light source and camera matching with the light source;

[0022] ③ The light source emits a predetermined light to illuminate the ink in the ink barrel, and the camera takes a picture of the ink illuminated by the light and obtains a plurality of pictures of the detected object;

[0023] ④ The image of the object to be detected decomposes the color into the color pixel values ​​of the object to be detected, and the color pixel values ​​of the object to be detected are analyzed by computer into a CIELAB color difference spectrum of the object to be detected;

[0024] ⑤ The detection device is provided with a standard CIELAB color difference spectrum;

[0025] ⑥ The CIELAB color difference spectrum includes cylindrical coordinates L*, brightness a*, and chromaticity coordinates b* axes;

[0026] ⑦ Compare the CIELAB color difference spectrum of the test object with the standard CIELAB color difference spectrum one by one through multiple pictures of the test object, considering the parameter value range, color difference range and light influence factors;

[0027] Then determine whether the unsolidified ink meets the standard value.

[0028] Before the ink solidifies, it has certain reflective properties. By acquiring images at a predetermined light source and a predetermined angle, the interference from external sources can be effectively reduced.

[0029] The CIELAB color difference spectrum can be used to obtain the reflectance value of unsolidified ink through the brightness a*, thereby reducing the error caused by the cone of the human eye. That is, the color card contrast of the human eye is greatly affected by the reflectance value of the ink. Therefore, when the angle is different, the color card obtained will have a difference.

[0030] And through the CIELAB color difference spectrum of the standard and the CIELAB color difference spectrum of the test object;

[0031] The above-mentioned interference factors can be eliminated or corrected, thereby improving the color detection effect of the ink. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a schematic diagram of the present invention;

[0033] Figure 2 It is a schematic diagram of an upper stirring device;

[0034] Figure 3 It is a schematic diagram of a bottom-mounted stirring device;

[0035] Figure 4 Schematic diagram of multi-angle detection

[0036] Figure 5 Figure 4 shows the detection method.

[0037] In the figure,

[0038] 1 is the box body,

[0039] 2 is a moving device, 21 is a guide rail, 22 is a slider, 23 is a first driving device,

[0040] 3 is a feeding device, 31 is a mother bottle, 32 is a pump body,

[0041] 4 is a stirring device, 41 is a vertical moving frame, 42 is a rotating motor, 43 is a stirring roller,

[0042] 5 is an ink barrel,

[0043] 6 is a receiving device,

[0044] 7 is to avoid empty space,

[0045] 8 is a sealing ring, 81 is a positioning portion, 82 is a positioning groove,

[0046] 9 is a detection device, 91 is a light source, and 92 is a camera. DETAILED DESCRIPTION

[0047] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0048] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, top, bottom, inside, outside, vertical, horizontal, longitudinal, counterclockwise, clockwise, circumferential, radial, axial...), then the directional indication is only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0049] In addition, if there are descriptions involving "first" or "second" etc. in the embodiments of the present invention, the descriptions of "first" or "second" etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0050] like Figures 1 to 4 As shown, an automatic ink color mixing device comprises:

[0051] Box 1;

[0052] A moving device 2, the moving device 2 is arranged in the middle of the box body 1, the moving device 2 comprises a guide rail 21, a slider 22 slidably mounted on the guide rail 21, and a first driving device 23 driving the slider 22 to move, the slider 22 is provided with a detachable ink barrel 5;

[0053] The feeding device 3 is arranged at the front end of the mobile device 2. The feeding device 3 is composed of a plurality of mother bottles 31 and a pump body 32 which is integrally or separately arranged with the mother bottles 31. The feeding device 3 can be detachably installed at the lower position of the mobile device 2.

[0054] The pump body 32 delivers the ink masterbatch to the ink barrel 5 through the conduit;

[0055] A control device, the control device is used to control the ink masterbatch delivery amount of each pump body 32;

[0056] A stirring device 4, wherein the stirring device 4 is provided at the middle position of the moving device 2, and when a predetermined amount of each masterbatch is delivered to the ink barrel 5, the slider 22 drives the ink barrel 5 to move to the position of the stirring device 4, and the stirring device 4 is used to stir the ink in the ink barrel 5;

[0057] The detection device is used to detect the ink color of the ink barrel 5 and determine whether it meets the predetermined requirements.

[0058] In the existing automatic ink color matching device, the ink barrel 5 and the stirring device 4 are generally integrated, and then a predetermined amount of ink is taken out for color matching, which has color difference, so there is a slight difference in color, which is why people occasionally find the color difference of cigarette labels when using them;

[0059] The mobile device 2 changes the problem of the traditional single mechanism, facilitates the automatic color matching, and makes color matching simpler. The color can be adjusted in real time through the detection device, effectively improving the color consistency accuracy of the ink color, and the structure is simple and stable. Although the structure is simple, its color matching is simpler, and the box 1 can be a dark environment, thereby reducing the interference of external light and ensuring the accuracy of detection.

[0060] Specifically, the stirring device 4 is a vertical moving frame 41 provided on the upper wall of the chassis, a rotating motor 42 provided on the vertical moving frame 41, and a stirring roller 43 is connected to the lower end of the rotating motor 42. This structure has a more comprehensive stirring effect, that is, the stirring roller 43 can be adjusted vertically, thereby achieving full mixing of the ink.

[0061] In the embodiment of the present invention, the box 1 is provided with a receiving device 6 on one side adjacent to the stirring device 4, and the receiving device 6 can be moved to a position below the stirring device 4 and used to receive the ink of the stirring device 4, thereby effectively avoiding ink contamination.

[0062] Specifically, the ink barrel 5 is provided with a pivotally arranged stirring roller 43, a sealing ring 8 is provided between the stirring roller 43 and the ink barrel 5, a clearance position 7 is provided below the ink barrel 5, the lower end of the stirring roller 43 extends into the clearance position 7 and is provided with a positioning groove 82, the stirring device 4 includes a vertical movable frame 41, and a rotating motor 42 arranged on the vertical movable frame 41, and the driving end of the rotating motor 42 is provided with a positioning portion 81 that cooperates with the positioning groove 82.

[0063] The vertical moving frame 41 may be a telescopic electric cylinder or a vertical screw rod pair.

[0064] That is, the bottom-mounted stirring device 4 does not need a special shielding object and has a simple and stable structure.

[0065] Specifically, the positioning groove 82 is non-circular, triangular or quadrilateral, and the upper end of the positioning portion 81 is provided with a chamfered corner with a reduced diameter, so as to facilitate the matching of the positioning groove 82 and the positioning portion 81 and facilitate the insertion of the positioning portion 81.

[0066] A printing ink detection method, comprising the above-mentioned automatic ink color adjustment device;

[0067] S1: The moving device 2 drives the ink barrel 5 to pass through the feeding device 3, the stirring device 4 and the detection device in sequence; (of course, the detection method can also be applied to the existing ink color mixing device);

[0068] S2: The control device controls each mother bottle 31 of the feeding device 3 to deliver a predetermined amount of ink into the ink barrel 5;

[0069] S3: The stirring device 4 stirs the ink in the ink barrel 5 to a predetermined mixing degree;

[0070] S4: The detection device detects the ink color of the ink barrel 5 and determines whether it meets the predetermined requirements; when the detection does not meet the predetermined requirements, the moving device 2 drives the ink barrel 5 to move to the feeding device 3, and the control device controls the pump body 32 to add the predetermined ink masterbatch, and then moves to the stirring device 4.

[0071] The detection methods in S4 include:

[0072] ① The ink barrel 5 and the detection device are located in a dark environment without external light;

[0073] ②Detection includes light source and camera matching with the light source;

[0074] ③ The light source emits a predetermined light to illuminate the ink in the ink barrel 5, and the camera takes a picture of the ink illuminated by the light and obtains a plurality of pictures of the detected object;

[0075] ④ The image of the object to be detected decomposes the color into the color pixel values ​​of the object to be detected, and the color pixel values ​​of the object to be detected are analyzed by computer into a CIELAB color difference spectrum of the object to be detected;

[0076] ⑤ The detection device is provided with a standard CIELAB color difference spectrum;

[0077] ⑥ The CIELAB color difference spectrum includes cylindrical coordinates L*, brightness a*, and chromaticity coordinates b* axes; (wherein the calculation of these values ​​is prior art),

[0078] ⑦ Compare the CIELAB color difference spectrum of the test object with the standard CIELAB color difference spectrum one by one through multiple pictures of the test object, considering the parameter value range, color difference range and light influence factors;

[0079] Then determine whether the unsolidified ink meets the standard value.

[0080] Before the ink solidifies, it has certain reflective properties. By acquiring images at a predetermined light source and a predetermined angle, the interference from external sources can be effectively reduced.

[0081] The CIELAB color difference spectrum can be used to obtain the reflectance value of unsolidified ink through the brightness a*, thereby reducing the error caused by the cone of the human eye. That is, the color card contrast of the human eye is greatly affected by the reflectance value of the ink. Therefore, when the angle is different, the color card obtained will have a difference.

[0082] And through the CIELAB color difference spectrum of the standard and the CIELAB color difference spectrum of the test object;

[0083] The above-mentioned interference factors can be eliminated or corrected, thereby improving the color detection effect of the ink.

[0084] Specifically, the CIELAB color difference spectrum of the test object is used to eliminate interference factors or correct interference factors by computer, and form a comparative CIELAB color difference spectrum;

[0085] The interference factors include reflection value, light source angle value and light source type;

[0086] Compare the CIELAB color difference spectrum of the test object with the standard CIELAB color difference spectrum, and then obtain the first segment of data;

[0087] Then, the CIELAB color difference spectrum is compared with the standard CIELAB color difference spectrum to obtain the second segment of data.

[0088] By comparing the two pieces of data, we can get the influence of moisture, reflective ink, etc. on the ink color.

[0089] Specifically, the light source is a point light source, a surface light source, a coaxial light source or a dome light source;

[0090] The coaxial light source and the dome light source are used simultaneously. By adjusting the brightness between the two light sources, the predetermined area of ​​the ink is evenly covered with light, avoiding problems such as shadow surface and reflection.

[0091] The dome light source is a highly uniform light source. The light emitted by the high-brightness SMD LED is diffusely reflected by the spherical surface to form a uniform light. It is suitable for detecting objects with reflective and uneven surfaces.

[0092] Coaxial light sources provide more uniform illumination than traditional light sources while avoiding reflections from objects, thereby improving the accuracy and reproducibility of machine vision.

[0093] Specifically, the light source and the camera can adjust the relative angle to obtain images of the detected object at different angles, thereby obtaining different parameters, or according to different ink reflectivity (wherein the cigarette label generally has a certain gloss, and the adjustment is achieved according to different glossiness).

[0094] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the inventive concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. An automatic ink color matching device, characterized in that: include, Box; A moving device, the moving device is arranged in the middle of the box body, the moving device comprises a guide rail, a slider slidably mounted on the guide rail, and a first driving device driving the slider to move, the slider is provided with a detachable ink barrel; A feeding device is arranged at the front end of the mobile device. The feeding device is composed of a plurality of mother bottles and a pump body which is integrally or separately arranged with the mother bottles. The feeding device can be detachably installed at the lower position of the mobile device. The pump body transports the ink masterbatch to the ink barrel through the conduit; A control device, the control device is used to control the ink masterbatch delivery amount of each pump body; A stirring device, wherein the stirring device is provided at the middle position of the moving device, and when a predetermined amount of each masterbatch is delivered to the ink barrel, the slider drives the ink barrel to move to the position of the stirring device, and the stirring device is used to stir the ink in the ink barrel; The detection device is used to detect the ink color of the ink barrel and determine whether it meets the predetermined requirements.

2. The automatic ink color mixing device according to claim 1, characterized in that: The stirring device is a vertical movable frame arranged on the upper wall of the chassis and a rotating motor arranged on the vertical movable frame, and a stirring roller is connected to the lower end of the rotating motor.

3. The automatic ink color mixing device according to claim 2, characterized in that: A receiving device is provided on one side of the box body adjacent to the stirring device. The receiving device can be moved to a position below the stirring device and is used to receive ink from the stirring device.

4. The automatic ink color mixing device according to claim 1, characterized in that: The ink barrel is provided with a pivotally arranged stirring roller, a sealing ring is provided between the stirring roller and the ink barrel, an escape position is provided below the ink barrel, the lower end of the stirring roller extends into the escape position and is provided with a positioning groove, the stirring device includes a vertical movable frame, a rotating motor arranged on the vertical movable frame, and a driving end of the rotating motor is provided with a positioning portion matching the positioning groove.

5. The automatic ink color mixing device according to claim 4, characterized in that: The positioning groove is in a non-circular shape, a triangular shape or a quadrilateral shape, and the upper end of the positioning portion is provided with a chamfered corner with a reduced diameter.

6. A printing ink detection method, characterized in that: An automatic ink color mixing device comprising any one of claims 1 to 5; S1: The moving device drives the ink barrel to pass through the feeding device, stirring device and detection device in sequence; S2: The control device controls each mother bottle of the feeding device to deliver a predetermined amount of ink into the ink barrel; S3: The stirring device stirs the ink in the ink barrel to a predetermined mixing degree; S4: The detection device detects the ink color of the ink barrel and determines whether it meets the predetermined requirements; when the detection does not meet the predetermined requirements, the moving device drives the ink barrel to move to the feeding device, and the control device controls the pump body to add the predetermined ink masterbatch, and then moves to the stirring device.

7. The printing ink detection method according to claim 6, characterized in that: The detection methods in S4 include: ① The ink barrel and the detection device are located in a dark environment without external light; ②Detection includes light source and camera matching with the light source; ③ The light source emits a predetermined light to illuminate the ink in the ink barrel, and the camera takes a picture of the ink illuminated by the light and obtains a plurality of pictures of the detected object; ④ The image of the object to be detected decomposes the color into the color pixel values ​​of the object to be detected, and the color pixel values ​​of the object to be detected are analyzed by computer into a CIELAB color difference spectrum of the object to be detected; ⑤ The detection device is provided with a standard CIELAB color difference spectrum; ⑥ The CIELAB color difference spectrum includes cylindrical coordinates L*, brightness a*, and chromaticity coordinates b* axes; ⑦ Compare the CIELAB color difference spectrum of the test object with the standard CIELAB color difference spectrum one by one through multiple pictures of the test object, considering the parameter value range, color difference range and light influence factors; Then determine whether the unsolidified ink meets the standard value.

8. The printing ink detection method according to claim 7, characterized in that: The CIELAB color difference spectrum of the test object is used to eliminate interference factors or correct interference factors by computer, and form a comparative CIELAB color difference spectrum; The interference factors include reflection value, light source angle value and light source type; Compare the CIELAB color difference spectrum of the test object with the standard CIELAB color difference spectrum, and then obtain the first segment of data; Then, the CIELAB color difference spectrum is compared with the standard CIELAB color difference spectrum to obtain the second segment of data.

9. The printing ink detection method according to claim 7, characterized in that: The light source is a point light source, a surface light source, a coaxial light source or a dome light source; The coaxial light source and the dome light source are used simultaneously.

10. The printing ink detection method according to claim 7, characterized in that: The light source and the camera can adjust the relative angle to obtain images of the detected object at different angles.

Images