Joint detection device for label paper of packaging machine
By using a 15-degree tilted color mark sensor in the label paper joint detection device of the packaging machine, the problem of missed rejection in joint detection under high speed was solved, achieving high-precision joint identification and rejection, and improving product quality.
Patent Information
- Application Number
- CN202520289696.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-21
- Publication Date
- 2025-12-23
- Estimated Expiration
- 2035-02-21
AI Technical Summary
The existing label paper splice detection device for packaging machines cannot accurately identify and reject splices at high speeds, resulting in a 30% missed rejection rate. This leads to defective cigarette packs flowing into downstream processes and affecting product quality.
Employing a color mark sensor detection head tilted at 15 degrees, combined with an information line and controller, it can identify and reject joints in complex color systems, shielding against the effects of paper shaking and external dust, thus improving detection accuracy.
It achieves efficient identification and rejection of trademark paper joints at high speeds, reduces the rate of missed rejections, and improves product quality stability and test adaptability.
Smart Images
Figure CN223703095U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to detection device, in particular to a kind of joint detection device for packaging machine trademark paper. BACKGROUND
[0002] After packaging machine is changed from pre-cutting type to reel type feed, there is the problem that trademark paper itself joint and splicing joint cannot be accurately rejected. The joint detection used in the original machine is thickness detection. It is found in the production process that about 30% of the rejection rate is missed, which causes significant quality risks due to the flow of joints into the downstream machine. After adjusting the joint detection position and its sensitivity for many times, the effect is not ideal.
[0003] The existing card paper fixed cutting detection system has the following shortcomings:
[0004] The existing trademark paper joint detection cannot meet the production needs and has a missed rejection situation.
[0005] The existing detection detection precision cannot meet the needs of actual production, and the detection precision is not sensitive enough. It cannot meet the needs of rejecting trademark paper joints at high speed, which can easily lead to the production of defective cigarette packs and the flow into the next process flow to cause the production of defective products.
[0006] It is found that whether it is trademark itself joint detection or splicing detection, there is a black joint tape mark on the white surface of the trademark paper. SUMMARY
[0007] The utility model discloses a kind of joint detection devices for packaging machine trademark paper, which can overcome the problems of the prior art.
[0008] In order to achieve the purpose of the utility model, the following technical solutions are adopted in the present application:
[0009] The utility model discloses a kind of joint detection devices for packaging machine trademark paper, which can overcome the problems of the prior art.
[0010] The utility model discloses a joint detection device for trademark paper of packaging machine, wherein the detector is installed on the frame on one side of the trademark paper.
[0011] The utility model discloses a joint detection device for trademark paper of packaging machine, wherein the detector is installed on the frame on both sides of the trademark paper.
[0012] The utility model discloses a joint detection device for trademark paper of packaging machine, wherein the joint detection device for trademark paper of packaging machine further includes a controller, which is installed on the upper end of the frame, and the detection head is connected with the controller through an information line.
[0013] The utility model discloses a joint detection device for trademark paper of packaging machine, wherein the detection head is a color mark sensor.
[0014] The utility model discloses a joint detection device for trademark paper of packaging machine, wherein the inclination angle a of the detection head relative to the trademark paper is 15°.
[0015] The utility model discloses a joint detection device for trademark paper of packaging machine, which has the following advantages:
[0016] ①, the new joint detection is the color mark light intensity multi-mode detection, which can adapt to various different joint colors
[0017] No matter what color the joint is, it can be identified. It can distinguish the trademark paper joint to the greatest extent without being affected by its auxiliary materials. It has high applicability, and no matter what joint the trademark paper manufacturer uses, the detection can detect the joint color. Moreover, since there are various patterns and colors of trademark paper, it is very complex to effectively and quickly identify the color that needs to be removed in the complex color system. The detection can truly realize effective identification of the fixed color needed in the multi-color and removal.
[0018] ②, the new joint detection is stable and strong, and is not affected by paper shaking and other external factors
[0019] Since the trademark paper shakes during conveying, and the trademark paper is flowing, the traditional detection sensor is affected by light and material shaking. The trademark paper joint detection device of the application can effectively shield the influence of paper shaking, thereby effectively identifying the joint.
[0020] ③, the new joint detection is stable and strong, and is not affected by external dust and other factors
[0021] Since the detection joint is exposed outside the machine in actual production and use, it is easy to produce soot during daily maintenance, thereby affecting the detection accuracy or requiring a large amount of time for subsequent detection maintenance. Since the trademark paper joint detection device has the multifunctional intelligent color identification function for color and the filtering function for small color, the stability is high and is not affected by external dust and other factors. BRIEF DESCRIPTION OF DRAWINGS
[0022] Figure 1 It is a three-dimensional schematic view of one direction of the trademark paper joint detection device for a packaging machine.
[0023] Figure 2 It is a three-dimensional schematic view of another direction of the trademark paper joint detection device for a packaging machine.
[0024] Figure 3 It is a three-dimensional schematic view of an amplifier.
[0025] In Figures 1 to 3 , the number 1 is a controller; the number 2 is a trademark paper; the number 3 is a rack; the number 4 is an L-shaped support; the number 5 is a detection head; the number 6 is a screw rod; the number 7 is a nut; the number 8 is an L-shaped base; the number 9 is a first paper guide wheel; the number 10 is a second paper guide wheel; the number 11 is a gasket; the number 12 is a groove; the number 13 is a protrusion; the number 14 is a detection port; and the number 15 is a locking screw. DETAILED DESCRIPTION
[0026] 1. As shown in Figure 1 and 2 , the trademark paper joint detection device for a packaging machine comprises a detector and a controller 1, the detector is mounted on the rack 3 above the first paper guide wheel 9 and the second paper guide wheel 10, and the trademark paper 2 is guided by the first paper guide wheel 9 and the second paper guide wheel 10. As shown in Figure 3 , the detector comprises an L-shaped support 4, a detection head 5, a screw rod 6, a nut 7, an L-shaped base 8, and a gasket 11, the detector is mounted on the rack 3 on the left and right sides of the trademark paper 2, the upper end of one side of the L-shaped support 4 is fixed on the rack 3, the lower end of the other side of the L-shaped support 4 is provided with a groove 12, the upper end of one side of the L-shaped base 8 is provided with a protrusion 13, the protrusion 13 is inserted into the groove 12, one end of the screw rod 6 passes through the L-shaped support 4 and the L-shaped base 8 in sequence, the nut 7 is fixed on the other end of the screw rod 6, the detection head 5 is fixed on the lower end of one side of the L-shaped base 8 through the gasket 11 and the locking screw 15, the detection port 14 corresponding to the detection head 5 is formed on the other side of the L-shaped base 8, the controller 1 is mounted on the rack 3 and is connected with the detection head 5 through an information line, the detection head 5 is a color sensor, and the inclination angle of the detection head 5 relative to the trademark paper 2 is 15° due to the adjustment of the locking screw 15, the screw rod 6, and the nut 7.Figure 3 The working principle of the detection head 5 is as follows:
[0027] The working principle of the detection head 5 is as follows:
[0028] I. Reduce the interference of specular reflection
[0029] When the light is vertically irradiated to the surface of the object, for some objects with smooth surface, specular reflection is easy to occur. The specular reflection can make the intensity and direction of the reflected light more concentrated, resulting in the light signal received by the sensor may be too strong or distorted. Placing the color scale sensor (detection head 5) at a 15-degree angle with the measured object can change the direction of the reflected light and reduce direct specular reflection.
[0030] For example, when detecting the color scale on the glossy plastic packaging material, if the sensor is vertically irradiated, it may not be able to accurately identify the color of the color scale due to strong specular reflection. After tilting 15 degrees, the reflected light will be more scattered in other directions, and the sensor (detection head 5) receives light after a certain diffuse reflection, which can more truly reflect the color characteristics of the color scale. Comparison data shows that according to optical experiments, when the light is vertically irradiated to the surface of the object with high gloss, the intensity of the specular reflection light may be several times that of the diffuse reflection light. When irradiated at a 15-degree angle, the intensity of the specular reflection light decreases significantly, and in general cases, the proportion of diffuse reflection components in the reflected light can be increased by about 30%-50% (the specific data may vary due to factors such as the material of the object surface), which helps to improve the accuracy of color scale detection
[0031] II. Enhance color contrast
[0032] The inclination angle can make the color patch and the color of the surrounding object form a better contrast under the viewing angle of the sensor (the detection head 5). The appearance of color will be different when observing an object from different angles due to optical phenomena such as light absorption, reflection, and refraction. A 15-degree inclination angle can make the boundary between the color patch color and the background color more clearly distinguished by the sensor. For example, when detecting a color patch printed on a paper label, the paper itself may have some texture and color unevenness. When the sensor is inclined by 15 degrees, the difference between the color patch color and the background color of the paper will be more obvious in the light signal received by the sensor, because the reflection and scattering paths of light on the color patch and the background are different, thereby improving the color contrast. Color theory supports: according to the Munsell color system in color science, the perception of color depends not only on the three elements of color itself (hue, value, and purity), but also on the observation angle and lighting conditions. Under the conditions of 15-degree inclination of illumination and observation, the relative lightness difference of the color patch and the background color may increase, which can more accurately identify the color patch for color patch sensors based on color lightness difference. For example, in the detection of some color printed matter, the color difference (△E value) between the color patch and the background color under a 15-degree inclination angle may increase by about 10%-20% in the detection of the sensor, which helps to more accurately locate the color patch.
[0033] The above application uses specific examples to describe the present application, which is only used to help understand the present application and does not limit the present application. For those skilled in the art to which the present application belongs, according to the idea of the present application, a number of simple deductions, deformations or substitutions can be made.
Claims
1. A splice detection device for label paper in a packaging machine, comprising: The detector and controller (1) are mounted on a frame (3) above the first guide roller (9) and the second guide roller (10). The trademark paper (2) is guided by the first guide roller (9) and the second guide roller (10). The detector is characterized by comprising: an L-shaped bracket (4), a detection head (5), a screw (6), a nut (7), an L-shaped base (8), and a gasket (11). The upper end of one side of the L-shaped bracket (4) is fixed to the frame (3), and a groove (12) is opened at the lower end of the other side of the L-shaped bracket (4). 8) There is a protrusion (13) on the upper end of one side. The protrusion (13) is inserted into the groove (12). One end of the screw (6) passes through the L-shaped bracket (4) and the L-shaped base (8) in sequence. The nut (7) is fixed to the other end of the screw (6). The detection head (5) is fixed to the lower end of one side of the L-shaped base (8) by the washer (11) and the fastening screw (15). On the other side of the L-shaped base (8), there is a detection port (14) corresponding to the detection head (5). The controller (1) is mounted on the frame (3). It is connected to the detection head (5) through the information line.
2. The joint detection device for label paper in packaging machines as described in claim 1, characterized in that: The detector is mounted on a frame (3) on one side of the trademark paper (2).
3. The joint detection device for label paper in packaging machines as described in claim 1, characterized in that: The detector is mounted on the frame (3) on the left and right sides of the trademark paper (2).
4. The joint detection device for label paper of a packaging machine as described in claim 2 or 3, characterized in that: The detection head (5) is a color mark sensor.
5. The joint detection device for label paper in packaging machines as described in claim 4, characterized in that: The angle α between the detection head (5) and the trademark paper (2) is 15°.