A partial point printing device for color printing of a packaging box

Abstract

The application discloses a kind of local point printing equipment for packing box color printing, it is related to packing box color printing technical field;Including body and support plate, the support plate is equipped with positioning plate, deviation correction component, it includes multiple deviation correction blocks located in the circumferential side of the positioning plate, for the position correction and positioning of packing box, suction assembly, it includes multiple suction holes opened in the positioning plate and deviation correction block, main conduit is slidably connected in the positioning plate, vice conduit is slidably connected in the deviation correction block, for switching suction position, adjusting component, it includes multiple adjusting plates slidably connected with the deviation correction block, when the adjusting plate is located outside the deviation correction block, the positioning plate generates suction force and adsorbs packing box to flatten, the deviation correction block deviates packing box, when adjusting plate is located in the deviation correction block, the deviation correction block no longer slides and its suction force fixes packing box;The present application can automatically and self-adaptively position, flatten and fix packing box.

Description

Technical Field

[0001] This invention relates to the field of color printing technology for packaging boxes, and in particular to a partial dot printing device for color printing of packaging boxes. Background Technology

[0002] Corrugated boxes are one of the most widely used packaging products, consistently ranking first in usage among all packaging materials. For over half a century, corrugated boxes have gradually replaced wooden crates and other transport packaging containers due to their superior performance and ease of processing, becoming the mainstay of transport packaging. Besides protecting goods and facilitating warehousing and transportation, they also serve to beautify and promote products.

[0003] Currently, patterns are typically printed on specific areas of corrugated boxes, and wax is usually sprayed onto them for better waterproofing. However, aside from the printed areas, most of the corrugated boxes are monochrome, making them rather monotonous. Therefore, spot printing of patterns, logos, or functional coatings is often used on the surface of the box. Screen printing is generally used for this, but the boxes are usually placed manually on the printing platform. During this process, the boxes often shift or become uneven, preventing them from fitting perfectly on the platform. This results in incomplete ink absorption and a lack of adaptive positioning and fixation for boxes of similar dimensions, ultimately leading to poor printing quality.

[0004] Therefore, a local dot printing device for color printing on packaging boxes is invented to solve the above problems. Summary of the Invention

[0005] The main objective of this invention is to provide a partial dot printing device for color printing on packaging boxes, which can effectively solve the technical problems in the background art.

[0006] To achieve the above objectives, the technical solution adopted by the present invention is as follows: a partial dot printing device for color printing on packaging boxes, comprising a machine body and a support plate, wherein the support plate is provided with an internally hollow positioning plate, and further comprising: The correction assembly includes multiple correction blocks located at the four corners of the positioning plate and hollow inside. The correction blocks are slidable and used to correct and position the packaging box. The adsorption assembly includes multiple adsorption holes formed on and communicating with the positioning plate and the correction block. A main conduit is slidably connected to the positioning plate and communicating with the inside of the correction block. A secondary conduit that can be inserted into the main conduit is slidably connected to the correction block for switching the adsorption position. An adjustment assembly includes multiple adjustment plates slidably connected to the correction block. When the adjustment plate is outside the correction block, the positioning plate generates an adsorption force to adsorb and level the packaging box, and the correction block corrects the deviation of the packaging box. When the adjustment plate is inside the correction block, the correction block no longer slides and generates an adsorption force to fix the four corners of the packaging box. The power assembly includes multiple guide cylinders corresponding to the correction block, used to drive the correction block to slide and generate negative pressure attraction.

[0007] Preferably, the correction assembly includes a plurality of clearance grooves formed on the positioning plate and corresponding to the correction block, the correction block has a sliding plate fixed on it and slidably connected to the positioning plate, and a first elastic element is provided between the sliding plate and the positioning plate.

[0008] Preferably, the adsorption assembly includes a positioning ring located inside the main guide tube, and a baffle is fixed to the side of the positioning ring away from the secondary guide tube by a plurality of guide posts, and a second elastic element is provided between the baffle and the positioning ring.

[0009] Preferably, the secondary conduit is fixed with a vent plate that can be inserted into the positioning ring at one end near the main conduit, and a top rod that can contact the baffle is fixed with one end of the vent plate near the main conduit.

[0010] Preferably, the adjustment assembly includes a connecting plate slidably connected to the correction block, a synchronizing rod fixed between the connecting plate and the auxiliary guide tube, a guide rod slidably connected inside the slide plate, an L-shaped guide groove opened at one end of the connecting plate near the slide plate, the vertical section of the guide groove passing through the connecting plate, and the guide rod being able to move within the guide groove.

[0011] Preferably, two push blocks are slidably connected inside the slide plate, and the opposing surfaces of the two push blocks are wedge-shaped surfaces. The push block away from the guide cylinder is fixedly connected to the guide rod, and a fourth elastic element is provided between the connecting plate and the correction block.

[0012] Preferably, the power assembly includes a piston plate slidably connected to the guide cylinder, a sleeve is fixed to one end of the guide cylinder away from the correction block, a transmission rod is slidably connected inside the sleeve, and the free end of the transmission rod is fixedly connected to the push block near the guide cylinder.

[0013] Preferably, the end of the guide cylinder near the correction block is connected to the auxiliary guide tube through a telescopic tube, and the end of the piston plate near the sleeve is connected to the guide cylinder through a third elastic element.

[0014] Preferably, the machine body is provided with a movable support frame, and a plurality of insertion posts corresponding to the guide cylinder are fixed on the support frame. The insertion posts can be inserted into the guide cylinder and contact the piston plate.

[0015] Preferably, the machine body is provided with a displacement mechanism, which is fixedly connected to the support frame and is used to drive the support frame to move. The support frame is provided with a screen printing mechanism for performing partial screen printing on the packaging box.

[0016] The technical effects and advantages of this invention are as follows: This invention, through the coordinated arrangement of a correction block, an adjusting plate, a positioning plate, a guide cylinder, and a piston plate, not only enables adaptive positioning and correction of packaging boxes with similar dimensions via the correction block, but also allows for overall adsorption and leveling of the packaging box via the positioning plate. This ensures the packaging box is flat and adhered to the positioning plate for printing. After the correction block completes its positioning and correction, it can automatically switch states with the assistance of the adjusting plate, stopping the correction block from sliding to ensure positioning accuracy and preventing excessive pressure on the edges of the packaging box, thus avoiding damage. Simultaneously, the correction block generates negative pressure adsorption force to re-adsorb and fix the four corners of the packaging box, ensuring the quality and effect of local screen printing on the packaging box. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the positioning plate in this invention; Figure 3 This is a cross-sectional view of the positioning plate in this invention; Figure 4 This is a schematic diagram of the structure of the power component and the correction component in this invention; Figure 5 This is a cross-sectional view of the power assembly in this invention; Figure 6 This is a cross-sectional view of the structure at the correction block in this invention; Figure 7 This is a schematic diagram of the adsorption component and the regulating component in this invention; Figure 8 This is a schematic diagram showing the structure of the positioning ring and the vent plate in this invention.

[0018] In the diagram: 1. Body; 2. Support plate; 3. Positioning plate; 4. Correction assembly; 401. Correction block; 402. Clearance groove; 403. Slide plate; 404. First elastic element; 5. Adsorption assembly; 501. Adsorption hole; 502. Main tube; 503. Secondary tube; 504. Positioning ring; 505. Guide post; 506. Baffle; 507. Second elastic element; 508. Ventilation plate; 509. Top rod; 6. Adjustment assembly; 601. Adjustment plate; 602. Connecting plate; 603. Synchronizing rod; 604. Guide rod; 605. Guide groove; 606. Push block; 607. Fourth elastic element; 7. Power assembly; 701. Guide cylinder; 702. Piston plate; 703. Sleeve; 704. Transmission rod; 705. Telescopic tube; 706. Third elastic element; 707. Support frame; 708. Insert column; 8. Displacement mechanism; 9. Screen printing mechanism. Detailed Implementation

[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention. Example 1

[0020] like Figure 1 and Figure 2 As shown, this embodiment provides a partial dot printing device for color printing on packaging boxes, including a body 1 and a support plate 2. The support plate 2 is provided with a hollow positioning plate 3 and a correction component 4, which includes a plurality of correction blocks 401 located at the four corners of the positioning plate 3 and hollow inside. The correction blocks 401 can slide and are used to correct and position the packaging box.

[0021] The machine body 1 is provided with a movable support frame 707, and a displacement mechanism 8 is provided on the machine body 1. The displacement mechanism 8 is fixedly connected to the support frame 707 and is used to drive the support frame 707 to move. The support frame 707 is provided with a screen printing mechanism 9 for partial screen printing on the packaging box.

[0022] In use, the packaging box to be partially printed is first placed on the positioning plate 3 on the support plate 2. Then, multiple correction blocks 401 are moved synchronously to fix the four corners of the packaging box. Since the correction blocks 401 are L-shaped and have a bottom surface, they can easily fit the four corners of the packaging box and support them. After the correction blocks 401 have corrected and positioned the packaging box, the displacement mechanism 8 and the screen printing mechanism 9 are started. The displacement mechanism 8 and the screen printing mechanism 9 are existing technologies, and their specific structures and connections will not be described in detail. The displacement mechanism 8 and the support frame 707 drive the screen printing mechanism 9 to move towards the packaging box and stop at the working position. Then, the screen printing mechanism 9 prints ink on the packaging box. After printing, the displacement mechanism 8 drives the screen printing mechanism 9 away from the packaging box through the support frame 707. Finally, the packaging box to be printed is replaced. The height of the correction blocks 401 is less than the thickness of the packaging box to avoid collision between the correction blocks 401 and the screen printing mechanism 9. Example 2

[0023] During use, it was found that the correction block 401 only corrects the positioning of the packaging box. In the process of positioning and correction, the packaging box is often not leveled to a certain extent, so the packaging box cannot be flat against the support plate 2. As a result, the ink cannot be completely absorbed on the packaging box during the printing process, resulting in poor printing effect. Therefore, further improvements were made based on the above embodiments.

[0024] like Figures 2 to 8 As shown, the adsorption component 5 includes a plurality of adsorption holes 501 opened on the positioning plate 3 and the correction block 401 and communicating with their interiors. A main conduit 502 is slidably connected in the positioning plate 3 and communicating with the interior of the correction block 401. A secondary conduit 503 that can be inserted into the main conduit 502 is slidably connected in the correction block 401 for switching the adsorption position. The adjustment component 6 includes multiple adjustment plates 601 that are slidably connected to the correction block 401. When the adjustment plate 601 is outside the correction block 401, the positioning plate 3 generates an adsorption force to adsorb and level the packaging box, and the correction block 401 corrects the deviation of the packaging box.

[0025] The power assembly 7 includes a plurality of guide cylinders 701 corresponding to the correction block 401, for driving the correction block 401 to slide and generating negative pressure attraction.

[0026] The correction component 4 includes multiple clearance grooves 402 formed on the positioning plate 3 and corresponding to the correction block 401. The correction block 401 is fixed with a sliding plate 403 that is slidably connected to the positioning plate 3. A first elastic element 404 is provided between the sliding plate 403 and the positioning plate 3.

[0027] Two push blocks 606 are slidably connected inside the slide plate 403. The opposing surfaces of the two push blocks 606 are wedge-shaped surfaces. The push block 606 away from the guide cylinder 701 is fixedly connected to the guide rod 604. A fourth elastic element 607 is provided between the connecting plate 602 and the correction block.

[0028] The power assembly 7 includes a piston plate 702 that is slidably connected to the guide cylinder 701. A sleeve 703 is fixed to one end of the guide cylinder 701 away from the correction block 401. A transmission rod 704 is slidably connected inside the sleeve 703. The free end of the transmission rod 704 is fixedly connected to a push block 606 near the guide cylinder 701.

[0029] One end of the guide tube 701 near the correction block 401 is connected to the auxiliary guide tube 503 through the telescopic tube 705. One end of the piston plate 702 near the sleeve 703 is connected to the guide tube 701 through the third elastic element 706. Multiple insertion posts 708 corresponding to the guide tube 701 are fixed on the support frame 707. The insertion posts 708 can be inserted into the guide tube 701 and contact the piston plate 702.

[0030] In use, when the support frame 707 drives the insertion post 708 to be inserted into the guide tube 701, the insertion post 708 maintains a good seal with the guide tube 701. At this time, the insertion post 708 contacts the piston plate 702 and pushes the piston plate 702 to slide along the guide tube 701 toward the third elastic member 706. The third elastic member 706 is compressed, so that the piston plate 702 pushes the gas in the guide tube 701 into the sleeve 703. The gas volume in the sleeve 703 increases, which drives multiple correction blocks 401 to slide synchronously relative to each other through the transmission rod 704 and the slide plate 403. The first elastic member 404 is compressed, so that the multiple correction blocks 401 automatically correct and position the packaging box.

[0031] Simultaneously, the piston plate 702 draws gas from the positioning plate 3 into the guide cylinder 701 through the telescopic tube 705, the secondary guide tube 503, and the main guide tube 502. At this time, the gas inside the positioning plate 3 is exhausted, generating negative pressure. Under the action of negative pressure, the negative pressure draws gas from the gap between the packaging box and the positioning plate 3 through multiple adsorption holes 501, reducing the pressure between the packaging box and the positioning plate 3. Under the action of external gas pressure, the packaging box is made to fit towards the positioning plate 3, thereby leveling the packaging box to a certain extent under the action of air pressure, further ensuring printing quality. Example 3

[0032] During use, it was also found that after the correction block 401 fully contacts the four corners of the packaging box, the correction block 401 will continue to move, which may easily squeeze and damage the corners of the packaging box. At the same time, the four corners of the packaging box are not flattened and fixed, resulting in poor screen printing effect on the packaging box. Therefore, further improvements were made based on the above embodiments.

[0033] like Figures 2 to 8 As shown, when the adjusting plate 601 is located inside the correction block 401, the correction block 401 no longer slides and it generates an adsorption force to fix the four corners of the packaging box.

[0034] The adsorption assembly 5 includes a positioning ring 504 located in the main tube 502. A baffle 506 is fixed to the side of the positioning ring 504 away from the secondary tube 503 by a plurality of guide posts 505. A second elastic element 507 is provided between the baffle 506 and the positioning ring 504.

[0035] The auxiliary conduit 503 is fixed with a vent plate 508 that can be inserted into the positioning ring 504 at one end near the main conduit 502, and a push rod 509 that can contact the baffle 506 at one end near the main conduit 502.

[0036] The adjustment assembly 6 includes a connecting plate 602 that is slidably connected to the correction block 401. A synchronizing rod 603 is fixed between the connecting plate 602 and the secondary guide tube 503. A guide rod 604 is slidably connected inside the slide plate 403. An L-shaped guide groove 605 is provided at one end of the connecting plate 602 near the slide plate 403. The vertical section of the guide groove 605 passes through the connecting plate 602, and the guide rod 604 can move within the guide groove 605.

[0037] It should be noted that when the pressure between the packaging box and the adjusting plate 601 fails to overcome the elastic force of the fourth elastic element 607, the guide groove 605 on the connecting plate 602 restricts the vertical sliding of one of the push blocks 606 through the guide rod 604, so that the transmission rod 704 drives the correction block 401 to slide through the two push blocks 606. When the adjusting plate 601 slides into the correction block 401, the guide groove 605 on the connecting plate 602 no longer restricts the vertical sliding of the guide rod 604, so that the transmission rod 704 drives one push block 606 to slide and drives the other push block 606 to slide vertically through the wedge surface. At this time, the correction block 401 no longer slides and remains stationary.

[0038] In use, when the four corner compression adjustment plates 601 of the packaging box slide back and forth along the correction block 401 into the correction block 401, the adjustment plate 601 drives the connecting plate 602 to slide, and the fourth elastic element 607 is compressed. At this time, the guide rod 604 slides from the guide groove 605 on the connecting plate 602 to the corner of the guide groove 605. At the same time, the transmission rod 704 drives a push block 606 to slide laterally along the slide plate 403. Since the guide rod 604 on the other push block 606 is at the through point of the guide groove 605, one push block 606 drives the other push block 606 to slide vertically along the slide plate 403 through the wedge surface. The other push block 606 drives the guide rod 604 to slide along the guide groove 605 and extend out of the connecting plate 602, so that the transmission rod 704 no longer drives the slide plate 403 to slide through the two push blocks 606, so that the multiple correction blocks 401 are in a stationary state to position the packaging box.

[0039] Simultaneously, the connecting plate 602, via the synchronizing rod 603, drives the secondary guide tube 503 along the correction block 401 in a direction away from the main guide tube 502, causing the secondary guide tube 503 to pull the vent plate 508 out of the positioning ring 504. Since the vent plate 508 is hollow, the secondary guide tube 503 connects to the correction block 401 through the vent plate 508, and the vent plate 508 causes the top rod 509 to no longer press against the baffle 506. Under the action of the second elastic element 507, the multiple guide posts 505 drive the baffle 506... 06 slides towards the positioning ring 504, and the baffle 506 seals the opening of the positioning ring 504. At this time, the piston plate 702 draws the gas in the correction block 401 into the guide cylinder 701 through the telescopic tube 705 and the auxiliary guide tube 503, so that the gas in the correction block 401 is discharged and a negative pressure is generated. Under the action of the negative pressure, the correction block 401 is attracted to the four corners of the packaging box through the adsorption hole 501 and thus the four corners of the packaging box are adsorbed and fixed, ensuring the quality of the printing on the packaging box.

[0040] After printing is completed, the insert 708 gradually detaches from the guide cylinder 701 and no longer squeezes the piston plate 702. Under the action of the third elastic element 706, the third elastic element 706 drives the piston plate 702 to slide along the guide cylinder 701 towards the direction of the correction block 401. The piston plate 702 no longer squeezes gas into the sleeve 703. At this time, under the action of the first elastic element 404, the first elastic element 404 drives multiple correction blocks 401 to slide in opposite directions through the slide plate 403. The push block 606 connected to the guide rod 604 slides along the slide plate 403 under its own weight, so that another push block 606 drives the transmission rod 704 to slide along the sleeve 703. The guide rod 604 slides again to the corner of the guide groove 605.

[0041] At this time, the correction block 401 drives the adjusting plate 601 to gradually move away from the packaging box. Under the action of the fourth elastic element 607, the fourth elastic element 607 drives multiple adjusting plates 601 to slide relative to each other through the connecting plate 602 and slide to the outside of the correction block 401, so that the guide rod 604 slides along the horizontal groove of the guide groove 605 and abuts against the side wall of the guide groove 605. The piston plate 702 squeezes the gas in the guide cylinder 701 into the correction block 401 through the telescopic tube 705 and the auxiliary conduit 503, so that the negative pressure is no longer generated, so that the correction block 401 no longer adheres to and fixes the four corners of the packaging box.

[0042] Simultaneously, the connecting plate 602 drives the auxiliary conduit 503 to slide towards the main conduit 502 via the synchronizing rod 603, causing the auxiliary conduit 503 to drive the vent plate 508 to insert into the positioning ring 504. The vent plate 508 pushes the baffle 506 via the push rod 509, causing the guide post 505 to slide away from the positioning ring 504. The second elastic element 507 is stretched, thereby allowing the telescopic tube 705 to connect with the inside of the positioning plate 3 through the auxiliary conduit 503 and the main conduit 502. As the piston plate 702 slides towards the correction block 401, gas is refilled into the positioning plate 3, and the air pressure inside the positioning plate 3 returns to normal, making it easier to remove the packaging box for replacement.

[0043] In summary, through the coordinated setup of the correction block 401, adjusting plate 601, positioning plate 3, guide cylinder 701, and piston plate 702, not only can the correction block 401 adaptively position and correct packaging boxes with similar dimensions, but the positioning plate 3 can also perform overall adsorption and leveling of the packaging box, ensuring that the packaging box is flat and attached to the positioning plate 3 for printing. After the correction block 401 has finished positioning the packaging box, it can automatically switch states with the assistance of the adjusting plate 601, so that the correction block 401 stops sliding to ensure positioning accuracy and prevent damage to the edges of the packaging box. At the same time, the correction block 401 generates negative pressure adsorption force to re-adsorb and fix the four corners of the packaging box, ensuring the quality and effect of local screen printing on the packaging box.

[0044] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of this invention is defined by the appended claims and their equivalents.

Claims

1. A partial dot printing device for color printing on packaging boxes, comprising a body and a support plate, characterized in that, The support plate is provided with an internally hollow positioning plate, and also includes: The alignment component includes multiple alignment blocks located at the four corners of the positioning plate and hollow inside. The alignment blocks are slidable and used to correct and position the packaging box. The adsorption assembly includes multiple adsorption holes formed on the positioning plate and the correction block and communicating with their interiors. A main conduit communicating with the interior of the correction block is slidably connected inside the positioning plate, and a secondary conduit that can be inserted into the main conduit is slidably connected inside the correction block for switching the adsorption position. An adjustment assembly includes multiple adjustment plates slidably connected to the correction block. When the adjustment plate is outside the correction block, the positioning plate generates an adsorption force to adsorb and level the packaging box, and the correction block corrects the deviation of the packaging box. When the adjustment plate is inside the correction block, the correction block no longer slides and generates an adsorption force to fix the four corners of the packaging box. The power assembly includes multiple guide cylinders corresponding to the correction block, used to drive the correction block to slide and generate negative pressure attraction.

2. The partial dot printing device for color printing on packaging boxes according to claim 1, characterized in that: The correction assembly includes multiple clearance slots formed on the positioning plate and corresponding to the correction block. The correction block has a sliding plate that is slidably connected to the positioning plate. A first elastic element is provided between the sliding plate and the positioning plate.

3. A partial dot printing device for color printing on packaging boxes according to claim 2, characterized in that: The adsorption assembly includes a positioning ring located inside the main tube. A baffle is fixed to the side of the positioning ring away from the secondary tube by a plurality of guide posts. A second elastic element is provided between the baffle and the positioning ring.

4. A partial dot printing device for color printing on packaging boxes according to claim 3, characterized in that: The secondary conduit is fixed with a vent plate that can be inserted into the positioning ring at one end near the main conduit, and a top rod that can contact the baffle is fixed at one end of the vent plate near the main conduit.

5. A partial dot printing device for color printing on packaging boxes according to claim 4, characterized in that: The adjustment assembly includes a connecting plate slidably connected to the correction block, a synchronizing rod fixed between the connecting plate and the auxiliary guide tube, a guide rod slidably connected inside the slide plate, an L-shaped guide groove opened at one end of the connecting plate near the slide plate, the vertical section of the guide groove passing through the connecting plate, and the guide rod being able to move within the guide groove.

6. A partial dot printing device for color printing on packaging boxes according to claim 5, characterized in that: Two push blocks are slidably connected inside the slide plate. The opposing surfaces of the two push blocks are wedge-shaped. The push block away from the guide cylinder is fixedly connected to the guide rod. A fourth elastic element is provided between the connecting plate and the correction block.

7. A partial dot printing device for color printing on packaging boxes according to claim 6, characterized in that: The power assembly includes a piston plate slidably connected to the guide cylinder. A sleeve is fixed to one end of the guide cylinder away from the correction block. A transmission rod is slidably connected inside the sleeve. The free end of the transmission rod is fixedly connected to the push block near the guide cylinder.

8. A partial dot printing device for color printing on packaging boxes according to claim 7, characterized in that: The end of the guide cylinder near the correction block is connected to the auxiliary guide tube through a telescopic tube, and the end of the piston plate near the sleeve is connected to the guide cylinder through a third elastic element.

9. A partial dot printing device for color printing on packaging boxes according to claim 8, characterized in that: The machine body is provided with a movable support frame, and a plurality of insertion posts corresponding to the guide cylinder are fixed on the support frame. The insertion posts can be inserted into the guide cylinder and contact the piston plate.

10. A partial dot printing device for color printing on packaging boxes according to claim 9, characterized in that, The machine body is provided with a displacement mechanism, which is fixedly connected to the support frame and is used to drive the support frame to move. The support frame is provided with a screen printing mechanism for partial screen printing on the packaging box.

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