Device for eliminating rubber coating bubbles of preprinting plate roller

Abstract

The invention discloses a pre-printing roller rubber coating bubble eliminating device, which belongs to the field of carton printing machines and comprises a printing machine body and a pre-printing roller rotationally arranged on the printing machine body, a translation trolley capable of translating left and right is arranged above the pre-printing roller, and a bubble pressing mechanism and a bubble detecting mechanism are arranged on the translation trolley. The bubble pressing mechanism comprises a lifter connected with the translation trolley, a bubble pressing roller is arranged at the bottom of the lifter, and the bubble detection mechanism comprises bubble positioning pieces arranged on the two sides of the bubble pressing roller, springs arranged in the bubble positioning pieces, detection wheels arranged at the bottoms of the bubble positioning pieces and lifting rods connected with the detection wheels. A distance sensor is arranged at the top of the bubble positioning piece, a sensing piece is arranged on the lifting rod and located on the side, close to the distance sensor, of the bubble positioning piece, bubbles are positioned through the detection wheel and then removed through the bubble pressing roller, and the problems that in the running process of existing preprinting roller rubber coating, the bubbles are likely to be generated, and the rubber coating is bulged, and the rubber coating is prone to being damaged are solved. And the problem is solved by pressing with fingers.

Description

Technical Field

[0001] The invention relates to the field of carton printing machines, in particular to a device for eliminating bubbles in the rubber coating of a pre-printed plate roller. Background Art

[0002] In the printing industry, the plate roller is a key component in the printing process, and its surface quality directly affects the printing effect. When the existing printing press plate roller is set on the template and then printing, bubbles often occur due to various factors. For example, during the process of setting the template on the plate roller, if there are tiny impurities on the fitting surface, air residue, or the material compatibility between the template and the plate roller is poor, bubbles are easily formed between the two.

[0003] When bubbles are present on the surface of the plate roller, it will cause many serious problems during the printing process. Due to the presence of bubbles, the flatness of the plate roller surface is destroyed, which will cause uneven distribution of ink when it is transferred to the cardboard. Under the action of printing pressure, the ink at the bubble location may be over-accumulated or blank, resulting in obvious defects in the printing of the cardboard pattern, such as line interruption, mottled color, blurred pattern, etc., and then a large number of defective products are produced, which not only causes a huge waste of raw materials, but also seriously reduces production efficiency and increases production costs.

[0004] At present, bubbles that appear on the plate roller sample are mainly eliminated manually. This traditional processing method has many disadvantages. First, the efficiency of manual bubble detection is extremely low. Operators need to rely on their naked eyes and experience to check one by one on the surface of the plate roller. It is easy to miss tiny bubbles or bubbles hidden in the edges and corners of the plate roller. Secondly, it is difficult to ensure consistency and accuracy in the manual bubble elimination operation. Different operators have different pressing strength, techniques and processing time, which may result in the failure to completely eliminate bubbles or cause additional damage to the surface of the plate roller, further affecting the service life of the plate roller and printing quality. In addition, manual operation also requires downtime, which interrupts the printing production process and reduces production efficiency. Especially in large-scale, continuous printing production operations, this downtime loss is more significant. Summary of the invention

[0005] The purpose to be achieved by the present invention is to provide a device for eliminating bubbles in the rubber coating of a pre-printing plate roller, so as to solve the problem that bubbles are easily generated in the rubber coating of the existing pre-printing plate roller during operation, causing the rubber coating to bulge and need to be eliminated by pressing with fingers.

[0006] In order to achieve the above-mentioned purpose, the present invention adopts the following technical scheme: a pre-print plate roller coated bubble elimination device, comprising a printing body, a pre-print plate roller rotatably arranged on the printing body, characterized in that a translation trolley capable of translationally moving left and right is provided above the pre-print plate roller, a bubble pressing mechanism and a bubble detection mechanism are provided on the translation trolley, the bubble pressing mechanism comprises a lift connected to the translation trolley, a bubble pressing roller is provided at the bottom of the lift, the bubble detection mechanism comprises bubble positioning parts arranged on both sides of the bubble pressing roller, a spring arranged in the bubble positioning part, a detection wheel arranged at the bottom of the bubble positioning part and a lifting rod connected to the detection wheel, a distance sensor is provided on the top of the bubble positioning part, a sensing sheet is provided on the upper end of the lifting rod, and the sensing sheet is located on the side of the bubble positioning part close to the distance sensor.

[0007] Furthermore, the bubble positioning member includes a guide column located at the bottom of the elevator and a detection support frame arranged above the elevator and perpendicular to the guide column, the guide column is provided with a through hole, the bottom of the through hole has a step, the bottom of the spring abuts against the step, the detection support member has a partition plate, and the top of the spring abuts against the partition plate.

[0008] Furthermore, the partition plate separates the detection support into a spring accommodating groove and a detection accommodating groove, the lifting rod passes through the spring accommodating groove and the detection accommodating groove, the distance sensor extends into the detection accommodating groove, and the sensing sheet is located in the detection accommodating groove.

[0009] Furthermore, a limiting plate is provided on the top of the lifting rod.

[0010] Furthermore, the translation trolley includes a translation screw rotatably connected to the printing machine body, a translation nut arranged on the translation screw and a roller support frame fixedly arranged on the translation nut.

[0011] Furthermore, the upgrade machine includes a lifting screw rotatably arranged in the roller support frame, a lifting nut arranged on the lifting screw, an extension support rod fixedly arranged on the lifting nut, and a roller fixing frame fixedly arranged at the front end of the extension support rod.

[0012] Furthermore, the lift also includes a lifting drive motor, which is fixed on the roller support frame, and the output end of the lifting drive motor is connected to the lifting screw rod.

[0013] Furthermore, it also includes a protective plate, which is fixedly connected to the printing machine body and is located in front of the pre-printing plate roller to shield the pre-printing plate roller.

[0014] Furthermore, it also includes a human-machine interaction panel, which is arranged on the printing machine body and is used to control the translation drive motor and the lifting drive motor.

[0015] Compared with the prior art, the beneficial effects of the present invention are:

[0016] 1. In order to solve the problem that the existing pre-printing plate roller rubber coating is prone to generate bubbles during operation, causing the rubber coating to bulge and need to be eliminated by pressing with fingers, the present invention provides a bubble-pressing roller that can translate left and right and rise and fall above the pre-printing plate roller, and controls the bubble-pressing roller to move to the position of the bubble, so that the bubble-pressing roller replaces the fingers to press and eliminate the bubble.

[0017] 2. In order to solve the problem that the bubble position cannot be determined manually, the present invention provides elastically lifting and lowering detection wheels on both sides of the bubble pressing roller, the detection wheel is installed on the bubble positioning piece, a spring is provided in the bubble positioning piece, the detection wheel is connected to the bubble positioning piece through a lifting rod, the lifting rod is slidingly connected to the bubble positioning piece and is connected to the spring, a distance sensor is provided on the bubble positioning frame, and a sensing sheet is provided on the lifting rod. The detection wheel is driven close to the surface of the pre-printed plate roller, and then the bubble pressing roller is driven to move horizontally left and right. When there are bubbles on the surface of the pre-printed plate roller, the detection wheel will jump. At this time, the distance sensor will sense the distance change of the sensing sheet. When the distance change value exceeds the set value, it means that there are bubbles here. The bubble pressing roller will stay here and get close to the pre-printed plate roller to press the bubbles here. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The present invention will be further described below in conjunction with the accompanying drawings:

[0019] Figure 1 It is a schematic diagram of the overall structure of a bubble elimination device for glue coating of a pre-printing plate roller according to the present invention;

[0020] Figure 2 It is a structural schematic diagram of the bubble pressing mechanism and bubble detection mechanism of the invention;

[0021] Figure 3 for Figure 2 A magnified schematic diagram of center A.

[0022] In the figure: 1 printing machine body, 2 pre-printing plate roller, 3 translation trolley, 31 translation screw rod, 32 translation nut, 33 roller support frame, 34 translation drive motor, 4 bubble pressing mechanism, 41 lift, 411 lifting screw rod, 412 lifting nut, 413 extension support rod, 414 roller fixing frame, 415 lifting drive motor, 42 bubble pressing roller, 5 bubble detection mechanism, 51 bubble positioning member, 511 guide column, 512 detection support frame, 523 through hole, 524 step, 525 partition plate, 526 spring accommodating groove, 527 detection accommodating groove, 528 limit plate, 52 spring, 53 detection wheel, 54 lifting rod, 55 distance sensor, 56 induction sheet, 6 protective plate, 7 human-computer interaction panel. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0024] The technical solution of the present invention is described in detail with specific embodiments below. The following specific embodiments can be combined or replaced with each other according to actual conditions, and the same or similar concepts or processes may not be described in detail in some embodiments.

[0025] like Figures 1 to 3As shown, the present invention provides a device for eliminating bubbles in the glue coating of a pre-printed plate roller 2, including a printing machine body 11 using an existing corrugated board printing machine, having the function of transmitting and printing the corrugated board, and using the existing corrugated board printing machine also including a replaceable pre-printed plate roller 2. The present invention is provided with a mobile trolley 3 above the pre-printed plate roller 2, which can be driven by an electric device to move horizontally above the pre-printed plate roller 2, and a bubble pressing mechanism 4 and a bubble detection mechanism 5 are installed on the mobile trolley 3. At the same time, the bubble pressing mechanism 4 includes an elevator 41 that can be lifted up and down, which is used to drive a bubble pressing roller 42 to fit and leave the surface of the pre-printed plate roller 2, and the bubble pressing roller 42 is rotatably installed at the bottom of the elevator 41. At the same time, the present invention is also provided with a bubble detection mechanism used in conjunction with the bubble pressing roller 42. Mechanism 5, the bubble detection mechanism 5 includes bubble positioning members 51 arranged on both sides of the bubble pressing roller 42, and the bubble positioning members 51 are further divided into springs 52 arranged in the bubble positioning members 51, and detection wheels 53 arranged at the bottom of the bubble positioning members 51 and capable of jumping up and down. The detection wheels 53 are connected to the bubble positioning members 51 through lifting rods 54, and a distance sensor 55 is also arranged on the bubble positioning members 51, and a sensing sheet 56 is arranged near the top of the lifting rod 54. The elasticity of the spring 52 is used to realize that when the detection wheel 53 rolls on the surface of the pre-printing roller 2, once it encounters a bubble, the detection wheel 53 will jump due to the surface bulge, and this jumping will immediately cause the distance sensor 55 to sense the change in the distance of the sensing sheet 56. By setting a specific distance change value as the judgment threshold, the system can quickly and accurately determine the existence and precise position of the bubble, effectively solving the problem of manual difficulty in determining the bubble position, greatly improving the efficiency and accuracy of bubble detection, and avoiding missed detection or misjudgment caused by the subjectivity and limitations of manual detection.

[0026] According to the principle of detection and bubble pressing, the translation trolley 3 can move left and right above the pre-printed plate roller 2, driving the bubble pressing mechanism 4 and the bubble detection mechanism 5 to move as a whole. In the bubble detection mechanism 5, the detection wheel 53 is connected to the bubble positioning member 51 through the lifting rod 54 and cooperates with the spring 52. During operation, the detection wheel 53 is close to the surface of the pre-printed plate roller 2 under the action of the spring 52. When the translation trolley 3 drives the detection wheel 53 to move, if there are bubbles on the surface of the pre-printed plate roller 2, the bubbles will cause the detection wheel 53 to jump upward. Since the lifting rod 54 is slidably connected to the bubble positioning member 51 and is connected to the spring 52, the detection wheel 53 will drive the lifting rod 54 to move when jumping, thereby changing the distance between the induction sheet 56 on the lifting rod 54 and the distance sensor 55 at the top of the bubble positioning member 51. Once the distance change exceeds the set value, it indicates that bubbles are detected. At this time, the translation trolley 3 is controlled to stop moving, and then the elevator 41 of the bubble pressing mechanism 4 is activated, driving the bubble pressing roller 42 to descend and approach the pre-printed plate roller 2, and the bubble pressing roller 42 is used to press and eliminate the bubbles. The present invention can keenly capture even tiny bubbles on the surface of the pre-printed plate roller 2 through the ingenious combination of the detection wheel 53 and the spring 52, the distance sensor 55 and the sensor sheet 56, overcomes the defects of being difficult to detect tiny bubbles and difficult to determine the specific position of the bubbles during manual detection, and greatly improves the accuracy and reliability of bubble detection. At the same time, after the bubbles are accurately detected, the bubble pressing roller 42 can be quickly controlled to move to the bubble position and perform a pressing operation. Compared with the traditional manual finger pressing method, the pressing process is more stable, uniform and efficient, and can effectively prevent bubbles from remaining or further damage to the rubber package due to improper pressing, thereby ensuring the flatness and integrity of the rubber package of the pre-printed plate roller 2, maintaining the good working condition of the pre-printed plate roller 2, reducing the printing quality fluctuations caused by bubble problems, and improving the qualified rate and consistency of printed products.

[0027] The bubble positioning member 51 is divided into two parts. One part is a guide column 511 arranged at the bottom of the elevator 41 and located on both sides of the bubble pressing roller 42. A vertical through hole 523 is arranged in the guide column 511 for installing a lifting rod 54 and a spring 52. A step smaller than the outer diameter of the spring 52 is arranged at the bottom of the through hole 523. The bottom of the spring 52 abuts against the step to prevent the spring 52 from sliding off the bottom of the guide column 511. The setting of the guide column 511 enables the lifting rod 54 to slide in the through hole 523, while also limiting the lifting rod 54 from deviating left and right, so that the lifting rod 54 maintains vertical sliding in the guide column 511, and at the same time ensures the vertical jump of the detection wheel 53 and the detection accuracy. The other part of the bubble positioning member 51 is a detection support frame arranged above the elevator 41 and perpendicular to the guide column 511. The detection support 512 can be made in one piece or assembled. A partition plate 525 is arranged in the middle of the detection support 512, so that the detection support 512 forms a support member with a sun-shaped structure. The upper end of the spring 52 abuts against the lower end of the partition plate 525. The bubble positioning member 51 of the present invention satisfies the sensing of the distance sensor 55 and can transmit signals synchronously with the detection wheel 53, and the detection speed is fast. At the same time, the distance sensor 55 is located above the elevator 41, which is convenient for replacement and maintenance; the partition plate again separates the detection support 512 into a spring accommodating groove 526 and a detection accommodating groove 527, so that the movement of the spring 52 will not interfere with the detection of the distance sensor 55. At the same time, the lifting rod 54 can be moved by the elastic force of the spring 52, and can transmit the jumping signal to the distance sensor 55. No other power driving source is required, which can save manufacturing cost and use cost.

[0028] A limit plate 528 is provided at the top end of the lifting rod 54 . The limit plate 528 and the lifting rod 54 can be detachably connected or fixedly connected. The limit plate 528 is used to stabilize the lifting rod 54 on the detection support 512 .

[0029] The translation trolley 3 is composed of a translation screw 31, a translation thread 32 used in conjunction with the translation screw 31, a gate-shaped roller support frame 33 installed on the translation thread 32, and a translation drive motor 34. The translation screw 31 is installed parallel to the pre-printing plate roller 2, and the length of the translation screw 31 covers the length of the pre-printing plate roller 2. The translation screw 31 is rotatably connected to the printing machine body 1. As a key component of the entire translation mechanism, it provides a track for other components to move along its axial direction. The translation nut 32 is installed on the translation screw 31. Due to the thread structure of the screw, when the screw rotates, the nut will perform linear motion along the axial direction of the screw according to the rotation direction of the thread and the rotation direction of the screw. The roller support frame 33 is fixed on the translation nut 32, so when the translation nut 32 moves on the translation screw 31, the roller support frame 33 will move synchronously. The roller support is set as a door-type structure in order to install the elevator 41 and not interfere with the lifting and lowering of the elevator 41. The screw nut transmission has high precision. By accurately controlling the speed and rotation angle of the translation drive motor 34, the moving distance and position of the translation trolley 3 can be accurately controlled. This allows the bubble detection mechanism 5 and the bubble pressing mechanism 4 installed on the translation trolley 3 to be accurately positioned above the pre-printed plate roller 2, and can efficiently scan the surface of the pre-printed plate roller 2 to find bubbles.

[0030] The lift 41 includes a lifting screw 411, a lifting nut 412 used in conjunction with the lifting screw 411, an extended support rod installed on the lifting nut 412, a roller fixing frame fixedly set at the front end of the extended support rod, and a lifting drive motor 415. The lifting principle of the lift 41 is the same as the translation principle of the translation trolley 3, that is, the roller support frame 33 that can be driven to translate by the translation drive motor 34 can drive the bubble pressing roller 42 to move horizontally left and right, and the lifting roller fixing frame driven by the lifting drive motor 415 drives the bubble pressing roller 42 to move up and down. The left and right movement enables the bubble pressing roller 42 and the detection wheel 53 to move along the axial direction of the pre-printed plate roller 2, and the up and down movement can adjust the distance between the bubble pressing roller 42 and the detection wheel 53 and the surface of the pre-printed plate roller 2. Such a combined movement can ensure that the detection wheel 53 can contact various positions on the surface of the pre-printed plate roller 2, and bubble detection can be performed no matter it is near the edge part or the center area. When the detection wheel 53 finds a bubble, it can move left and right to accurately position the bubble pressing roller 42 to the lateral position of the bubble, and move up and down to adjust the bubble pressing roller 42 to a suitable height so that it can contact the bubble with optimal pressure; the extended support rod 413 makes it possible for the lifting and lowering of the bubble pressing roller 42 to not interfere with the roller support frame 33, and the roller fixing frame 414 is used to fix the bubble pressing roller 42 and ensure that the bubble pressing roller 42 can rotate.

[0031] The bubble detection step and bubble pressing step of the present invention include: when the printing of the cardboard pattern on the printing machine is unclear, the rotation of the pre-printed plate roller 2 is maintained, and the lifting drive motor 415 is started through the automatic control system of the printing machine so that the detection wheel 53 is lowered to be close to or in contact with the surface of the pre-printed plate roller 2. At this time, the translation drive motor 34 is started to allow the detection wheel 53 to roll on the surface of the pre-printed plate roller 2. Because the pre-printed plate roller 2 keeps rotating, the detection wheel 53 can perform a comprehensive detection of the surface of the pre-printed plate roller 2. At the same time, the detection wheel 53 is provided on both sides of the bubble pressing roller. When the value of the first detection wheel 53 that detects the bubble returns to normal, the second detection wheel 53 detects the bubble and presses the bubble to remove the middle of the bubble. At this time, the elevator 41 is driven downward to make the bubble pressing roller close to or in contact with the surface of the pre-printed plate roller 2, so as to complete the bubble removal. The present invention coordinates positioning through double-sided detection: the bubble positioning is more accurate. The two detection wheels 53 can sense the bubbles in sequence, not only can the lateral position of the bubbles be determined, but also the longitudinal position of the bubbles can be accurately calculated based on the time difference of the value change of the detection wheel 53 and the rotation speed of the pre-printing plate roller 2 and other parameters, thereby ensuring that the bubble pressing roller 42 can be accurately moved to the top of the bubble for processing, effectively avoiding the bubble pressing failure caused by inaccurate positioning or unnecessary damage to the pre-printing plate roller 2.

[0032] The protective plate 6 is fixedly connected to the printing machine body 1 and is located in front of the pre-printing plate roller 2 to shield the pre-printing plate roller 2. During the operation of the printing machine, the pre-printing plate roller 2 is in a high-speed rotating state. The protective plate 6 is fixedly connected to the printing machine body 1 and shields the pre-printing plate roller 2, which can effectively prevent the operator from contacting the rotating pre-printing plate roller 2 due to accidental touch, proximity or accident during the operation, avoiding safety accidents such as limb involvement and collision, providing reliable protection for the personal safety of the operator, reducing safety hazards in the workplace, and meeting the standards and requirements of safe production.

[0033] The human-machine interaction panel 7 is arranged on the printing machine body 1, and is used to control the translation drive motor 34 and the lifting drive motor 415. The human-machine interaction panel 7 is arranged on the printing machine body 1, and provides a centralized and intuitive control platform for the operator. Through a concise and clear graphical interface, button or touch screen operation mode, the operator can easily start, stop, and adjust the operating parameters of the translation drive motor 34 and the lifting drive motor 415; the human-machine interaction panel 7 can display the working status of the translation drive motor 34 and the lifting drive motor 415 in real time, including the motor speed, running time, temperature, and whether there is a fault alarm and other information. The operator can understand the operation of the motor at any time, find potential problems in time and take corresponding measures.

[0034] The above contents are some specific implementation modes of the present invention and do not limit the protection scope of the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A device for eliminating bubbles in the rubber coating of a pre-printing plate roller, comprising a printing machine body and a pre-printing plate roller rotatably arranged on the printing machine body, characterized in that: A translation trolley capable of translating left and right is provided above the pre-print plate roller, a bubble pressing mechanism and a bubble detection mechanism are provided on the translation trolley, the bubble pressing mechanism includes a lift connected to the translation trolley, a bubble pressing roller is provided at the bottom of the lift, the bubble detection mechanism includes bubble positioning parts provided on both sides of the bubble pressing roller, a spring provided in the bubble positioning part, a detection wheel provided at the bottom of the bubble positioning part and a lifting rod connected to the detection wheel, a distance sensor is provided on the top of the bubble positioning part, a sensing sheet is provided on the lifting rod, and the sensing sheet is located on the side of the bubble positioning part close to the distance sensor.

2. The device for eliminating bubbles in the pre-printing plate roller coating according to claim 1, characterized in that: The bubble positioning member includes a guide column located at the bottom of the elevator and a detection support frame arranged above the elevator and perpendicular to the guide column. A through hole is provided in the guide column, and a step is provided at the bottom of the through hole. The bottom of the spring abuts against the step. The detection support member has a partition plate, and the top of the spring abuts against the partition plate.

3. The device for eliminating bubbles in the pre-printing plate roller coating according to claim 2, characterized in that: The partition plate divides the detection support into a spring accommodating groove and a detection accommodating groove, the lifting rod passes through the spring accommodating groove and the detection accommodating groove, the distance sensor extends into the detection accommodating groove, and the induction sheet is located in the detection accommodating groove.

4. The device for eliminating bubbles in the pre-printing plate roller coating according to claim 1, characterized in that: A limiting plate is arranged on the top of the lifting rod.

5. The device for eliminating bubbles in the pre-printing plate roller coating according to claim 1, characterized in that: The translation trolley comprises a translation lead screw rotatably connected to the printing machine body, a translation nut arranged on the translation lead screw and a roller support frame fixedly arranged on the translation nut.

6. The device for eliminating bubbles in the pre-printing plate roller coating according to claim 5, characterized in that: The translation trolley also includes a translation driving motor, which is fixed on the printing machine body, and the output end of the translation driving motor is connected to the translation lead screw.

7. The device for eliminating bubbles in the pre-printing plate roller coating according to claim 6, characterized in that: The upgrade machine includes a lifting screw rotatably arranged in the roller support frame, a lifting nut arranged on the lifting screw, an extension support rod fixedly arranged on the lifting nut, and a roller fixing frame fixedly arranged at the front end of the extension support rod.

8. The device for eliminating bubbles in the pre-printing plate roller coating according to claim 7, characterized in that: The lift also includes a lift drive motor, which is fixed on the roller support frame, and an output end of the lift drive motor is connected to the lift screw rod.

9. The device for eliminating bubbles in the pre-printing plate roller coating according to claim 1, characterized in that: It also includes a protection plate, which is fixedly connected to the printing machine body and is located in front of the pre-printing plate roller to shield the pre-printing plate roller.

10. The device for eliminating bubbles in the pre-printing plate roller coating according to claim 8, characterized in that: It also includes a human-machine interaction panel, which is arranged on the printing machine body and is used to control the translation drive motor and the lifting drive motor.

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