A paper packaging production line and a control method thereof

Abstract

The application discloses a paper packaging production line and a control method thereof. The method comprises the following steps: transporting a paperboard blank with a pre-fold to a preforming mechanism to perform edge folding and rubberizing processing to form a paper box blank; transporting a face paper blank to a rubberizing mechanism to perform rubberizing processing; obtaining first image information of a surface of the face paper blank after rubberizing to determine a rubberizing quality detection result of each face paper blank; moving the paper box blank to the face paper blank with a qualified rubberizing quality detection result to form a paper box pre-attached piece; transporting the paper box pre-attached piece to a face attaching mechanism, and controlling the face attaching mechanism to perform folding and attaching processing on four side flaps of the face paper blank in the paper box pre-attached piece according to a preset attaching sequence to form a paper box finished product; and obtaining second image information of the paper box finished product in multiple different directions to classify and discharge the paper box finished product. The application can improve the forming quality and the qualified rate of the paper box finished product.

Description

Technical Field

[0001] This application relates to the field of automated processing technology, and in particular to a paper packaging production line and its control method. Background Technology

[0002] In the paper packaging production field, automated production lines have been widely used in the mass processing of paper packaging, such as paper boxes. They typically need to complete a series of processes in sequence, such as folding and fixing the creased cardboard, applying glue to the face paper, bonding the face paper to the box shape, folding and wrapping the face paper side wings, and inspecting and unloading the finished product. This achieves automated processing from raw material to finished paper box, replacing traditional manual operation and improving production efficiency.

[0003] In existing technologies, the control methods of paper packaging production lines are relatively simple, and there is a lack of effective coordination and linkage between various processing steps. It is impossible to accurately control the key quality links in the production process, which can easily lead to problems such as irregular folding edges of paper boxes, misalignment of the face paper, and loose folding and wrapping. These issues affect the quality of the finished paper boxes and make it difficult to meet the market's production requirements for high-quality paper boxes. Summary of the Invention

[0004] This application aims to address at least one of the technical problems existing in the prior art. To this end, this application proposes a paper packaging production line and its control method, which can improve the forming quality and yield of finished paper boxes.

[0005] In a first aspect, this application provides a control method for a paper packaging production line, comprising: The cardboard blank with pre-creases is transported to the preforming mechanism, and the preforming mechanism is controlled to fold and glue the edges of the cardboard blank to form a prototype of the cardboard box. The paper blank is transported to the glue coating mechanism, and the coating mechanism is controlled to apply glue to the bonding surface of the paper blank. Acquire first image information of the surface of the face paper blank after adhesive coating, and determine the adhesive coating quality test result of each face paper blank based on the first image information; The prototype paper box is transferred to the top of the face paper blank whose glue coating quality test result is qualified. Based on the positional relationship between at least two points in the prototype paper box and the face paper blank, the position of the prototype paper box is finely adjusted and placed on the face paper blank to form a pre-attached paper box. The pre-attached paper box is transported to the pasting mechanism, and the pasting mechanism is controlled to fold and paste the four sides of the paper blank in the pre-attached paper box according to the preset pasting sequence to form the finished paper box. Second image information of the finished paper box from multiple different angles is obtained, and the finished paper box is classified and cut according to the second image information.

[0006] The control method for a paper packaging production line according to the first aspect of this application has at least the following beneficial effects: First, a cardboard blank with pre-creases is transported to a pre-forming mechanism, which controls the folding and gluing of the cardboard blank around its perimeter to form a preliminary box shape. Simultaneously, a face paper blank is transported to a gluing mechanism for gluing the adhesive surface. After detecting the gluing quality of the face paper using first image information, the preliminary box shape and qualified face paper are precisely aligned and glued together to form a pre-attached box. Then, the face paper is folded in a preset order by a pasting mechanism to form the finished box. Finally, the finished product is sorted and cut using second image information. By performing image detection on the glued face paper, unqualified face paper blanks can be removed in advance, avoiding ineffective processing and material waste from the source. This also lays a good foundation for subsequent lamination processes, ensuring the stability of lamination quality. By accurately comparing the positional relationship between at least two points of the preliminary box shape and the face paper blank and fine-tuning the lamination position, problems such as offset and misalignment during lamination can be effectively avoided, ensuring the neat formation of the pre-attached box. Furthermore, image inspection and classification of finished cardboard boxes from multiple angles enables comprehensive quality control, accurately distinguishing between qualified and unqualified products and preventing substandard products from entering the market. The entire control process organically connects various processing steps, achieving coordinated operation between different mechanisms. This ensures precise control over every key step, including folding, gluing, applying glue, bonding, folding, inspection, and cutting. This not only improves the forming quality and pass rate of finished cardboard boxes but also optimizes the overall production process and reduces processing losses.

[0007] According to some embodiments of the first aspect of this application, the preforming mechanism includes a first suction drive structure, a guide channel, a fine-tuning drive structure, and an adhesive application structure; The control mechanism for the preforming process folds and glues the edges of the cardboard blank to form a preliminary cardboard box shape, including: Based on the preset cardboard box modeling drawing, determine the size information of the cardboard box, and adjust the diameter of the guide channel according to the size information; The first suction drive structure is controlled to pick up the bottom plate of the cardboard blank and move it toward the guide channel, so that the guide channel folds the four side plates of the cardboard blank upwards to be perpendicular to the bottom plate; Detect and obtain the included angle information between each side plate and the bottom plate in the cardboard blank; Based on the included angle information, the fine-tuning drive structure is controlled to fine-tune the position of each side plate in the cardboard blank, and the adhesive application structure is controlled to apply tape at the junction of every two adjacent side plates to fix the position between the side plates and between the side plates and the bottom plate, thus forming a prototype of the cardboard box.

[0008] According to some embodiments of the first aspect of this application, determining the adhesive coating quality test result for each of the face paper blanks based on the first image information includes: The first image information is preprocessed; Based on the preprocessed first image information, the adhesive coverage area of ​​the bottom surface and each side wing of the face paper blank is identified; The adhesive coverage rate of the bottom surface and each side wing is obtained based on the adhesive coverage area of ​​the bottom surface and each side wing in the face paper blank and the total area of ​​the area. If the adhesive coverage of the bottom surface is less than a preset first coverage threshold or the adhesive coverage of one of the side wings is less than a preset second coverage threshold, the adhesive coating quality test result of the face paper blank is marked as unqualified. When the adhesive coverage of the bottom surface is greater than or equal to the first coverage threshold and the adhesive coverage of all the side wings is greater than or equal to the second coverage threshold, the adhesive coating quality test result of the face paper blank is marked as qualified.

[0009] According to some embodiments of the first aspect of this application, after the step of marking the adhesive quality test result of the face paper blank as unqualified, the method further includes: The paper blanks that fail the adhesive coating test are then recoated with adhesive by a recoating mechanism. The third image information of the paper blank after the adhesive recoating process is re-acquired; Based on the third image information, determine the corresponding adhesive coating quality inspection result; If the glue coating quality test result is still unqualified, the corresponding face paper blank shall be rejected.

[0010] According to some embodiments of the first aspect of this application, the step of transferring the prototype cardboard box to the top of the face paper blank whose adhesive quality inspection result is qualified, and fine-tuning the position of the prototype cardboard box based on the positional relationship between at least two points in the prototype cardboard box and the face paper blank, and placing it on the face paper blank to form a pre-attached cardboard box, includes: The paper box prototype is transferred to the top of the face paper blank whose glue coating quality test result is qualified; Obtain the first set of coordinate information of two opposite vertices of the bottom plate in the paper box prototype in the preset direction, and the second set of coordinate information of two opposite vertices of the bottom surface in the face paper blank; Based on the first coordinate information group and the second coordinate information group, the position of the paper box prototype is finely adjusted so that the bottom plate of the paper box prototype is directly above the bottom surface of the paper blank; The pre-formed paper box is attached to the paper blank to form a pre-attached paper box.

[0011] According to some embodiments of the first aspect of this application, the bonding mechanism includes: a flattening structure, a second suction driving structure, a first side pressing structure, and a second side pressing structure; The step of transporting the pre-attached cardboard box to the laminating mechanism and controlling the laminating mechanism to fold and laminate the four side wings of the face paper blank in the pre-attached cardboard box according to a preset laminating sequence includes: The flattening structure is controlled to press the top of the pre-attached paper box component so that the paper box prototype is pressed firmly onto the paper blank. The second suction drive structure is controlled to pick up the carton pre-attached part and enter the first side pressing structure, so that the first side pressing structure guides one of the pair of side wings of the face paper blank in the carton pre-attached part to fold upward; The first side pressing structure is controlled to press the side wing corresponding to the face paper blank against the outside of one pair of side plates of the paper box prototype; The second suction drive structure is controlled to drive the carton pre-attachment into the second side pressing, so that the second side pressing structure guides the other pair of side wings of the face paper blank in the carton pre-attachment to fold upward; The second side pressing structure is controlled to press the side wing corresponding to the face paper blank against the outside of the other pair of side plates of the paper box prototype.

[0012] According to some embodiments of the first aspect of this application, the bonding mechanism further includes a corner bonding structure, an edge bonding structure, and a shaping structure, wherein the two sides of the pair of side wings are provided with corner protectors, and the end of each side wing is provided with an edge protector; After the step of controlling the second side pressing structure to press the side wing corresponding to the face paper blank against the outside of the other pair of side plates of the carton prototype, the method further includes: The corner-attaching mechanism is controlled to fold the corner inward so that the corner is attached to the other pair of side wings respectively; The edge-fitting structure is controlled to fold the edge inward so that the edge is tightly attached to the inner side of the side panel corresponding to the paper box prototype. The shaping structure is controlled to extend into the interior of the paper box prototype for shaping.

[0013] According to some embodiments of the first aspect of this application, the step of classifying and cutting the finished paper box according to the second image information includes: Preprocessing is performed on the second image information from several different orientations; Based on the preprocessed second image information, a defect analysis is performed on the finished paper box to determine the defect detection result for each finished paper box. Based on the defect detection results, the finished paper boxes are classified and cut into smaller pieces.

[0014] According to some embodiments of the first aspect of this application, the step of fine-tuning the position of the pre-formed cardboard box based on the positional relationship between at least two points in the pre-formed cardboard box and the paperboard blank, and placing it on the paperboard blank to form a pre-attached cardboard box, includes: Based on the positional relationship between at least two points in the prototype paper box and the paper blank, the position of the prototype paper box is adjusted, and the current alignment duration of the adjustment of the prototype paper box and the cumulative alignment duration of the paper blank are recorded. When the current alignment time reaches the preset first timeout response time, the current paper box prototype is placed in the first buffer position for temporary storage and the current alignment time is cleared to zero. The position of the next paper box prototype and the current paper blank is then captured for fine adjustment, and the current alignment time is recorded and the cumulative alignment time is updated. When the cumulative alignment time reaches the preset second timeout response time, the current face paper blank is temporarily stored in the second buffer position, and the next face paper blank with the qualified glue coating quality test result is loaded, and the current alignment time and the cumulative alignment time are cleared to zero. When the current alignment time is less than the first timeout response time, the cumulative alignment time is less than the second timeout response time, and in response to the alignment completion command, the fine-tuned paper box prototype is placed on the face paper blank to form a paper box pre-attached part; wherein, the alignment completion command is used to indicate that at least two points in the paper box prototype and the face paper blank have been aligned.

[0015] Secondly, this application also provides a paper packaging production line, comprising: At least one memory; At least one processor; At least one program; The program is stored in the memory, and the processor executes at least one of the programs to implement the control method for a paper packaging production line as described in any embodiment of the first aspect.

[0016] Thirdly, this application also provides a computer-readable storage medium storing a computer program for performing the control method for a paper packaging production line as described in any embodiment of the first aspect.

[0017] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0018] Additional aspects and advantages of this application will become apparent and readily understood in conjunction with the following description of the embodiments, in which: Figure 1 This is a schematic diagram of the structure of a paper packaging production line provided in some embodiments of this application; Figure 2 This is a schematic diagram of the structure of the cardboard box patch provided in some embodiments of this application; Figure 3 A flowchart illustrating a control method for a paper packaging production line provided in some embodiments of this application.

[0019] The attached icons are numbered as follows: Preforming mechanism 110; coating mechanism 120; laminating mechanism 130; touch-up coating mechanism 140; cardboard blank 210; cardboard box prototype 220; side panel 221; cardboard box pre-attached part 230; cardboard box finished product 240; face paper blank 300; side wing 310; corner wrap 320; edge wrap 330. Detailed Implementation

[0020] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application.

[0021] In the description of this application, it should be understood that the orientation descriptions, such as up, down, front, back, left, right, etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0022] In the description of this application, the use of "first" and "second" is for the purpose of distinguishing technical features only, and should not be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated or the order of the technical features indicated.

[0023] In the description of this application, unless otherwise expressly defined, terms such as "setup," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this application in conjunction with the specific content of the technical solution.

[0024] In the paper packaging production field, automated production lines have been widely used in the mass processing of paper packaging, such as paper boxes. They typically need to complete a series of processes in sequence, such as folding and fixing the creased cardboard, applying glue to the face paper, bonding the face paper to the box shape, folding and wrapping the face paper side wings, and inspecting and unloading the finished product. This achieves automated processing from raw material to finished paper box, replacing traditional manual operation and improving production efficiency.

[0025] In existing technologies, the control methods of paper packaging production lines are relatively simple, and there is a lack of effective coordination and linkage between various processing steps. It is impossible to accurately control the key quality links in the production process, which can easily lead to problems such as irregular folding edges of paper boxes, misalignment of the face paper, and loose folding and wrapping. These issues affect the quality of the finished paper boxes and make it difficult to meet the market's production requirements for high-quality paper boxes.

[0026] Based on this, this application provides a paper packaging production line and its control method to solve the above-mentioned technical problems. The technical solutions provided by this application will be described in detail below.

[0027] Firstly, referring to Figures 1 to 3 This application provides a control method for a paper packaging production line, which includes, but is not limited to, the following steps: Step S110: Transport the cardboard blank with pre-creases to the preforming mechanism, and control the preforming mechanism to fold and glue the edges of the cardboard blank to form a prototype of the cardboard box.

[0028] Step S120: Transport the paper blank to the gluing mechanism and control the coating mechanism to apply glue to the bonding surface of the paper blank.

[0029] Step S130: Obtain first image information of the surface of the coated paper blank, and determine the coating quality inspection result of each paper blank based on the first image information.

[0030] Step S140: Transfer the prototype of the cardboard box to the top of the paperboard blank whose glue coating quality inspection result is qualified, and adjust the position of the prototype of the cardboard box according to the positional relationship between at least two points in the prototype of the cardboard box and the paperboard blank, and place it on the paperboard blank to form a pre-attached cardboard box.

[0031] Step S150: Transport the pre-attached paper box to the laminating mechanism and control the laminating mechanism to fold and laminate the four sides of the paper blank in the pre-attached paper box according to the preset lamination sequence to form the finished paper box.

[0032] Step S160: Obtain second image information of the finished paper box from multiple different angles, and classify and cut the finished paper box according to the second image information.

[0033] In steps S110 to S160, the cardboard blank 210 with pre-creased edges is first transported to the pre-forming mechanism 110, which controls the folding and gluing of the cardboard blank 210 to form a preliminary cardboard box 220. Simultaneously, the face paper blank 300 is transported to the gluing mechanism for gluing. After the face paper gluing quality is detected using first image information, the preliminary cardboard box 220 is precisely aligned and glued with the qualified face paper to form a pre-attached cardboard box 230. Then, the face paper is folded in a preset order by the laminating mechanism 130 to form the finished cardboard box 240. Finally, the finished product is sorted and cut using second image information. By detecting the glued face paper using images, unqualified face paper blanks 300 can be removed in advance, avoiding ineffective processing and material waste from the source. This also lays a good foundation for subsequent lamination processes and ensures the stability of lamination quality. By precisely comparing the positional relationship of at least two points between the pre-formed cardboard box 220 and the paperboard blank 300 and fine-tuning the bonding position, problems such as misalignment and displacement during bonding can be effectively avoided, ensuring that the pre-attached cardboard box 230 is formed neatly. Furthermore, image inspection and classification of the finished cardboard box 240 from multiple angles allows for comprehensive quality control, accurately distinguishing between qualified and unqualified products, and preventing unqualified products from entering the market. The entire control process organically connects various processing steps, achieving coordinated operation of each mechanism. This ensures precise control of every key step, including folding, gluing, applying glue, bonding, folding, inspection, and cutting. This not only improves the forming quality and pass rate of the finished cardboard box 240 but also optimizes the overall production process and reduces processing losses.

[0034] It is understood that the preforming mechanism 110 includes a first suction drive structure, a guide channel, a fine-tuning drive structure, and an adhesive application structure. Step S110 may include, but is not limited to, the following steps: Step S210: Determine the size information of the cardboard box according to the preset cardboard box modeling drawing, and adjust the diameter of the guide channel according to the size information.

[0035] Step S220: Control the first suction drive structure to pick up the bottom plate of the cardboard blank and move it toward the guide channel so that the guide channel folds the four side plates of the cardboard blank upwards to be perpendicular to the bottom plate.

[0036] Step S230: Detect and obtain the angle information between each side plate and the bottom plate in the cardboard blank.

[0037] Step S240: Based on the included angle information, control the fine-tuning drive structure to fine-tune the position of each side plate in the cardboard blank, and control the adhesive application structure to apply tape at the junction of every two adjacent side plates to fix the position between the side plates and between the side plates and the bottom plate, forming a prototype of the cardboard box.

[0038] In steps S210 to S240, the size information of the cardboard box is determined based on the preset cardboard box modeling diagram, and the diameter of the guide channel is adjusted accordingly. This allows for flexible adaptation to the forming and processing requirements of cardboard blanks 210 of different specifications, broadening the applicability of the equipment. The first suction drive structure smoothly picks up and transports the cardboard blank 210, and the guide channel ensures the uniform folding of the four side plates 221, guaranteeing the consistency of the initial bending shape of the cardboard blank 210. Then, the angle information between the side plates 221 and the bottom plate is collected, and the posture of each side plate 221 is precisely corrected by the fine-tuning drive structure, effectively correcting the bending angle deviation and reducing forming errors. Adhesive tape is applied at the junction of adjacent side panels 221 to stabilize and constrain the relative positional relationship between side panels 221 and the bottom plate, as well as between adjacent side panels 221. This ensures that the formed paper box prototype 220 has a regular overall structure and stable shape, preventing deformation or misalignment of the paper box prototype 220 during subsequent conveying and processing. It provides a stable and reliable base for subsequent processes such as face paper lamination and side wing 310 folding, thereby improving the regularity and structural stability of the overall paper box processing.

[0039] It should be noted that the guide channel is located on the moving path of the first suction drive structure. The guide channel is a guide plate set around the bottom plate of the corresponding cardboard blank 210. The diameter of the guide channel at the end closer to the first suction drive structure is larger than the diameter at the end farther from the first suction drive structure, so as to guide the side plates 221 of the cardboard blank 210 to fold along the pre-crease. At the same time, the position of the guide plate can be adjusted, so as to adjust the diameter of the guide channel according to the cardboard blank 210 of different sizes, thereby improving the applicability of processing. The fine-tuning drive structure and the adhesive application structure can be located on both sides of the guide channel or below the guide channel. There are four fine-tuning drive structures, located around the bottom plate, which pick up the corresponding side plates 221 to adjust the relative angle between each side plate 221 and the bottom plate.

[0040] It is understood that step S130 may include, but is not limited to, the following steps: Step S310: Preprocess the first image information.

[0041] Step S320: Based on the preprocessed first image information, identify the adhesive coverage area of ​​the bottom surface and each side wing of the paper blank.

[0042] Step S330: Based on the adhesive coverage area of ​​the bottom surface and each side wing in the paper blank and the total area of ​​the region, obtain the adhesive coverage rate of the bottom surface and each side wing.

[0043] Step S340: When the adhesive coverage of the bottom surface is less than the preset first coverage threshold or the adhesive coverage of one of the side wings is less than the preset second coverage threshold, the adhesive coating quality test result of the marking paper blank is unqualified.

[0044] Step S350: When the adhesive coverage of the bottom surface is greater than or equal to the first coverage threshold and the adhesive coverage of all sides is greater than or equal to the second coverage threshold, the adhesive coating quality test result of the marking paper blank is qualified.

[0045] In steps S310 to S350, preprocessing the first image information effectively optimizes the image recognition effect, providing a reliable foundation for accurate identification of the adhesive state in the subsequent steps. Based on the preprocessed first image information, the adhesive coverage area of ​​the bottom surface of the paper blank 300 and each side wing 310 is identified respectively. The adhesive coverage rate is calculated by combining the total area of ​​the corresponding regions, achieving quantitative detection of the adhesive coating status of the paper blank 300, abandoning the traditional general detection method. Using the first and second coverage thresholds, the adhesive coverage rate of the bottom surface and each side wing 310 is divided into zones for judgment, allowing for targeted differentiation of the adhesive coating qualification standards at different locations, objectively and accurately completing the division of the adhesive coating quality detection results for the paper blank 300. This testing method comprehensively covers the key bonding areas of the paper blank 300, and can promptly screen out workpieces with substandard glue coating, preventing unqualified paper blank 300 from flowing into subsequent bonding processing stages. It reduces problems such as loose bonding and forming defects caused by insufficient glue coating from the source, and continuously ensures the overall processing quality and structural bonding stability of the carton.

[0046] It is understood that after step S340, the following steps may be included, but are not limited to: Step S410: For paper blanks that fail the adhesive coating test, the adhesive is recoated by the recoating mechanism.

[0047] Step S420: Reacquire the third image information of the paper blank after the adhesive recoating treatment is completed.

[0048] Step S430: Determine the corresponding adhesive coating quality inspection result based on the third image information.

[0049] Step S440: If the glue coating quality test result is still unqualified, the corresponding face paper blank shall be rejected.

[0050] In steps S410 to S440, the paper blanks 300 marked as having failed the adhesive coating quality inspection are recoated with adhesive by the recoating mechanism 140. This remediates minor defects such as insufficient adhesive coating or localized missed coating, avoiding material waste caused by directly classifying these paper blanks 300 as waste. This effectively improves the utilization rate of the paper blanks 300 and reduces production losses. After the recoating is completed, the third image information of the paper blank 300 is re-acquired, and the adhesive coating quality inspection result is re-determined based on the third image information. This allows for accurate judgment of the recoating effect, ensuring that the recoated paper blanks 300 meet the qualification standards. It also prevents paper blanks 300 with inadequate recoating from entering the subsequent bonding process, preventing defects such as loose bonding of the pre-attached parts 230 and paper detachment caused by adhesive coating problems. If the glue coating quality test result of the recoated face paper blank 300 is still unqualified, the corresponding face paper blank 300 will be rejected. This can prevent unqualified face paper blank 300 from flowing into the subsequent processing stage, ensure the processing quality of subsequent processes from the source, further improve the pass rate and overall quality of the finished paper box 240, and at the same time reduce the ineffective losses in subsequent processing caused by unqualified face paper blank 300.

[0051] It is understood that step S140 may include, but is not limited to, the following steps: Step S510: Transfer the cardboard box prototype to the top of the face paper blank whose glue coating quality inspection result is qualified.

[0052] Step S520: Obtain the first coordinate information set of the two opposite vertices of the bottom plate in the paper box prototype in the preset direction, and the second coordinate information set of the two opposite vertices of the bottom surface in the face paper blank.

[0053] Step S530: Based on the first coordinate information group and the second coordinate information group, fine-tune the position of the paper box prototype so that the bottom plate of the paper box prototype is directly above the bottom surface of the paper blank.

[0054] Step S540: Attach the cardboard box prototype to the paperboard blank to form a pre-attached cardboard box.

[0055] In steps S510 to S540, by acquiring the first coordinate information set of two relative vertices of the bottom plate in the preform 220 of the cardboard box and the second coordinate information set of two relative vertices of the bottom surface in the paperboard blank 300, and relying on the comparison of dual-point coordinates, the relative positional deviation between the preform 220 of the cardboard box and the paperboard blank 300 can be comprehensively and accurately fed back, avoiding the alignment error problem of single-point positioning. Based on the first and second coordinate information sets, the position of the preform 220 of the cardboard box is finely adjusted, ensuring that the bottom plate of the preform 220 is precisely above the bottom surface of the paperboard blank 300, achieving precise alignment and bonding between the two. This alignment method improves the bonding accuracy between the preform 220 of the cardboard box and the paperboard blank 300, prevents offset and skewing during bonding, and ensures the regularity of the structure of the pre-attached cardboard box 230 after molding, thereby guaranteeing the overall regularity of the cardboard box processing and the quality of the finished product.

[0056] It is understood that the bonding mechanism 130 includes a flattening structure, a second suction driving structure, a first side bonding structure, and a second side bonding structure. Step S150 may include, but is not limited to, the following steps: Step S610: Control the flattening structure to press the top of the pre-attached paper box so that the paper box prototype is pressed firmly onto the paper blank.

[0057] Step S620: Control the second suction drive structure to pick up the paper box pre-attached part and enter the first side pressing structure so that the first side pressing structure guides one pair of side wings of the paper blank in the paper box pre-attached part to fold upward.

[0058] Step S630: Control the first side pressing structure to press the side wings corresponding to the face paper blank to the outside of one pair of side plates of the carton prototype.

[0059] Step S640: Control the second suction drive structure to drive the paper box pre-attachment into the second side pressing, so that the second side pressing structure guides the other pair of side wings of the paper box pre-attachment to fold upward.

[0060] Step S650: Control the second side pressing structure to press the side wings corresponding to the face paper blank to the outside of the other pair of side plates of the carton prototype.

[0061] In steps S610 to S620, the top of the pre-attached cardboard box component 230 is pre-pressed by the flattening structure, which ensures that the cardboard box prototype 220 is stably pressed onto the face paper blank 300, effectively preventing the workpiece from shifting or loosening during subsequent folding operations. The pre-attached cardboard box component 230 is smoothly conveyed by the second suction drive structure, and in sequence, the first and second side pressing structures work together to guide and press the two sets of side wings 310 in a fixed order, achieving orderly processing of the four side wings 310 of the face paper blank 300. By using a step-by-step pressing method, the problem of uneven force caused by the simultaneous folding of multiple side wings 310 can be avoided. This allows each set of side wings 310 to be folded smoothly and tightly attached to the outside of the side plate 221 of the carton prototype 220, effectively reducing defects such as paper wrinkles, bonding gaps, and local detachment. This ensures the uniformity and integrity of the paper covering, further improving the appearance regularity and structural bonding strength of the finished carton 240.

[0062] It should be noted that the flattening structure is located on the front side of the second suction drive structure and is pre-fixed before the side wing 310 is pressed. The first side pressing structure and the second side pressing structure are located on the drive path of the second suction drive structure. The paper box prototype 220 picked up by the second suction structure first passes through the first side pressing mechanism and then passes through the second side pressing mechanism.

[0063] Understandably, referring to Figure 2 The bonding mechanism 130 further includes a corner bonding structure, an edge bonding structure, and a shaping structure, wherein a pair of side wings 310 are provided with corner protectors 320 on both sides, and each side wing 310 is provided with an edge protector 330 at its end. After step S650, the following steps may be included, but are not limited to: Step S710: Control the corner-attaching mechanism to fold the corners inward so that the corners are attached to the other pair of side wings respectively.

[0064] Step S720: Control the edge-fitting structure to fold the edge inward so that the edge is tightly attached to the inner side of the corresponding side panel of the carton prototype.

[0065] Step S730: Control the shaping structure to extend into the interior of the paper box prototype for shaping.

[0066] In steps S710 to S720, after the pressing and bonding of the two pairs of side wings 310 of the face paper blank 300 is completed, the corner-attaching structure is used to fold inward and attach the corners 320 on both sides of the side wings 310, which can provide a fine wrapping treatment for the corners of the carton, eliminate gaps in the corner splicing, and avoid the phenomenon of curling edges and poor adhesion. In conjunction with the edge-attaching structure, the edge-attaching structure of each side wing 310 is folded inward and attached to the inner side of the corresponding side plate 221 of the carton prototype 220, which can further tighten the edge structure of the face paper blank 300 and strengthen the overall wrapping and binding of the face paper. Finally, the shaping structure extends into the interior of the pre-formed cardboard box 220 for shaping. The size of this shaping structure matches the size of the inner cavity of the finished cardboard box 240 to avoid excessive compression of the interior of the pre-formed cardboard box 220 when the side wings 310, corner protectors 320, and edge protectors 330 are attached. This refined processing method improves the forming details of the edges and corners of the cardboard box, effectively enhancing the overall connection between the face paper blank 300 and the pre-formed cardboard box 220, and preventing the face paper edges from loosening and falling off.

[0067] It is understood that step S160 may include, but is not limited to, the following steps: Step S810: Preprocess the second image information from several different orientations.

[0068] Step S820: Based on the preprocessed second image information, perform defect analysis on the finished paper boxes and determine the defect detection results for each finished paper box.

[0069] Step S830: Based on the defect detection results, classify and cut the finished paper boxes.

[0070] In steps S810 to S830, preprocessing of second image information from multiple different orientations effectively removes image interference factors, ensuring the accuracy and stability of subsequent detection and analysis. Based on the preprocessed second image information, defect analysis of the finished cardboard box 240 is completed, accurately obtaining defect detection results. Then, based on the corresponding defect detection results, classification and material cutting are implemented, achieving a comprehensive and systematic quality assessment of the finished cardboard box 240. This orderly classification and material cutting method effectively separates good and defective products, preventing defective finished cardboard boxes 240 from flowing out normally, stabilizing the overall processing quality of the finished products, and facilitating the unified collection and processing of defective products.

[0071] It should be noted that the above-mentioned image information preprocessing specifically includes image noise reduction, illumination equalization correction, contour edge enhancement, effective area cropping, and visual distortion correction. These operations can effectively eliminate image errors caused by changes in ambient light, dust interference, and slight equipment vibration, correct color differences and perspective distortion, highlight the contour features of the target detection area, thereby improving the accuracy of adhesive coverage recognition and 240 defect analysis of finished paper boxes.

[0072] It should be noted that the defect analysis can specifically include detecting various defects such as folding and wrinkling of the face paper blank 300, misalignment of side bonding, loosening of corner glue, incomplete folding of corner wrapping 320 and edge wrapping 330, gaps in the bonding of the side wall of the paper box, deformation of the box body shape, and damage to the surface appearance, so as to comprehensively identify various quality defects generated in the finished paper box 240 during the wrapping and forming process.

[0073] It is understood that step S140 may include, but is not limited to, the following steps: Step S910: Adjust the position of the prototype paper box according to the positional relationship between at least two points in the prototype paper box and the paper blank, and record the current alignment time of the prototype paper box adjustment and the cumulative alignment time of the paper blank.

[0074] Step S920: When the current alignment time reaches the preset first timeout response time, the current paper box prototype is placed in the first buffer position for temporary storage and the current alignment time is cleared. The position of the next paper box prototype and the current paper blank is grabbed and fine-tuned. The current alignment time and the cumulative alignment time are recorded.

[0075] Step S930: When the cumulative alignment time reaches the preset second timeout response time, the current face paper blank is placed in the second buffer position for temporary storage, and the next face paper blank with qualified glue coating quality is loaded, and the current alignment time and cumulative alignment time are cleared to zero.

[0076] Step S940: When the current alignment time is less than the first timeout response time, the cumulative alignment time is less than the second timeout response time, and in response to the alignment completion command, the fine-tuned paper box prototype is placed on the face paper blank to form a paper box pre-attached part; wherein, the alignment completion command is used to indicate that at least two points in the paper box prototype and the face paper blank have been aligned.

[0077] It should be noted that the first timeout response time setting is designed to address abnormal situations during production where the prototype cardboard box itself has molding defects, or its actual position deviates significantly from the target alignment position, making it difficult to achieve precise adaptive alignment within the normal adjustment time. The second timeout response time setting is primarily to prevent adhesive layer adhesion decay or failure after the face paper blank has been glued due to prolonged alignment waiting time. After the face paper blank is glued, it maintains its optimal adhesive viscosity for a limited period. If the cumulative alignment waiting time is too long, the adhesive layer will cure prematurely or become insufficiently tacky, directly leading to subsequent quality defects such as weak bonding, peeling, and curling edges.

[0078] In steps S910 to S940, the current alignment time for the alignment adjustment and the cumulative alignment time corresponding to the current paper blank are recorded in real time. Combined with the first timeout response time set for abnormal alignment of the carton prototype and the second timeout response time set for adhesive failure of the paper blank, the corresponding workpiece is temporarily stored and switched. This method avoids station jams caused by defects in the carton prototype itself or excessive positional deviations preventing rapid alignment, ensuring continuous and efficient production line operation. It also prevents adhesive failure of the paper blank due to prolonged waiting for alignment, ensuring that the bonding operation is always completed when the paper adhesive layer is in optimal bonding condition, thus guaranteeing the alignment accuracy and bonding quality of the pre-attached carton parts.

[0079] Secondly, this application also provides a paper packaging production line, comprising: at least one memory; at least one processor; at least one program; the program is stored in the memory, and the processor executes the at least one program to implement the control method of the paper packaging production line as described in any embodiment of the first aspect.

[0080] In this paper packaging production line, pre-folded cardboard blanks are first transported to the pre-forming mechanism, where the edges are folded and glued to form a preliminary box shape. Simultaneously, the face paper blanks are transported to the gluing mechanism for gluing. After the face paper gluing quality is detected using first image information, the preliminary box shape and qualified face paper are precisely aligned and glued together to form a pre-attached box. Then, the pasting mechanism folds the four sides of the face paper in a preset sequence to form the finished box. Finally, the finished products are sorted and cut using second image information. By detecting the glued face paper, substandard face paper blanks can be removed in advance, avoiding ineffective processing and material waste at the source. This also lays a good foundation for subsequent lamination processes, ensuring the stability of lamination quality. By precisely comparing the positional relationship between at least two points of the preliminary box shape and the face paper blank and fine-tuning the lamination position, problems such as misalignment and displacement during lamination can be effectively avoided, ensuring the neat formation of the pre-attached box. Furthermore, image inspection and classification of finished cardboard boxes from multiple angles enables comprehensive quality control, accurately distinguishing between qualified and unqualified products and preventing substandard products from entering the market. The entire control process organically connects various processing steps, achieving coordinated operation between different mechanisms. This ensures precise control over every key step, including folding, gluing, applying glue, bonding, folding, inspection, and cutting. This not only improves the forming quality and pass rate of finished cardboard boxes but also optimizes the overall production process and reduces processing losses.

[0081] Memory, as a non-transitory computer-readable storage medium, can be used to store non-transitory software programs, non-transitory computer-executable programs, and signals, such as the program instructions / signals corresponding to the processing module in the embodiments of this application. The processor executes various functional applications and data processing by running the non-transitory software programs, instructions, and signals stored in the memory, thereby implementing the control method for the paper packaging production line in the above-described method embodiments.

[0082] The memory may include a program storage area and a data storage area. The program storage area may store the operating system and applications required for at least one function; the data storage area may store data related to the control method of the aforementioned paper packaging production line. Furthermore, the memory may include high-speed random access memory and non-transitory memory, such as at least one disk storage device, flash memory device, or other non-transitory solid-state storage device. In some embodiments, the memory may optionally include memory remotely located relative to the processor, and these remote memories can be connected to the processing module via a network. Examples of such networks include, but are not limited to, the Internet, corporate intranets, local area networks, mobile communication networks, and combinations thereof.

[0083] One or more signals are stored in a memory, and when executed by one or more processors, the control method for the paper packaging production line in any of the above method embodiments is executed.

[0084] Thirdly, embodiments of this application provide a computer-readable storage medium storing a computer program that is executed by one or more processors, enabling the one or more processors to perform the control method for the paper packaging production line in the above method embodiments.

[0085] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate, and the components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0086] Based on the above description of the embodiments, those skilled in the art will understand that all or some of the steps and systems in the methods disclosed above can be implemented as software, firmware, hardware, and suitable combinations thereof. Some or all physical components can be implemented as software executed by a processor, such as a central processing unit, digital signal processor, or microprocessor, or as hardware, or as an integrated circuit, such as an application-specific integrated circuit. Such software can be distributed on a computer-readable medium, which may include computer storage media (or non-transitory media) and communication media (or transient media). As is known to those skilled in the art, the term computer storage media includes volatile and non-volatile, removable and non-removable media implemented in any method or technology for storing information (such as computer-readable signals, data structures, program modules, or other data). Computer storage media includes, but is not limited to, RAM, ROM, EEPROM, flash memory or other memory technologies, CD-ROM, digital versatile disc (DVD) or other optical disc storage, magnetic cartridges, magnetic tape, disk storage or other magnetic storage devices, or any other medium that can be used to store desired information and is accessible by a computer. Furthermore, as is known to those skilled in the art, communication media typically contain computer-readable signals, data structures, program modules, or other data in modulated data signals such as carrier waves or other transmission mechanisms, and may include any information delivery medium.

[0087] It should be understood that in this application, "at least one (item)" means one or more, and "more than" means two or more. "And / or" is used to describe the relationship between related objects, indicating that three relationships can exist. For example, "A and / or B" can represent three cases: only A exists, only B exists, and both A and B exist simultaneously, where A and B can be singular or plural. The character " / " generally indicates that the preceding and following related objects are in an "or" relationship. "At least one (item) of the following" or similar expressions refer to any combination of these items, including any combination of single or plural items. For example, at least one (item) of a, b, or c can represent: a, b, c, "a and b", "a and c", "b and c", or "a and b and c", where a, b, and c can be single or multiple.

[0088] In the several embodiments provided in this application, it should be understood that the disclosed apparatus and methods can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative; for instance, the division of the units described above is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be through some interfaces; the indirect coupling or communication connection between apparatuses or units may be electrical, mechanical, or other forms.

[0089] The units described above as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0090] Furthermore, the functional units in the various embodiments of this application can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or as a software functional unit.

[0091] If the integrated unit is implemented as a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, or all or part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes multiple instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods of the various embodiments of this application. The aforementioned storage medium includes various media capable of storing programs, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0092] The embodiments of this application have been described in detail above with reference to the accompanying drawings. However, this application is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of this application.

Claims

1. A control method for a paper packaging production line, characterized in that, include: The cardboard blank with pre-creases is transported to the preforming mechanism, and the preforming mechanism is controlled to fold and glue the edges of the cardboard blank to form a prototype of the cardboard box. The paper blank is transported to the glue coating mechanism, and the coating mechanism is controlled to apply glue to the bonding surface of the paper blank. Acquire first image information of the surface of the face paper blank after adhesive coating, and determine the adhesive coating quality test result of each face paper blank based on the first image information; The prototype paper box is transferred to the top of the face paper blank whose glue coating quality test result is qualified. Based on the positional relationship between at least two points in the prototype paper box and the face paper blank, the position of the prototype paper box is finely adjusted and placed on the face paper blank to form a pre-attached paper box. The pre-attached paper box is transported to the pasting mechanism, and the pasting mechanism is controlled to fold and paste the four sides of the paper blank in the pre-attached paper box according to the preset pasting sequence to form the finished paper box. Second image information of the finished paper box from multiple different angles is obtained, and the finished paper box is classified and cut according to the second image information.

2. The control method for a paper packaging production line according to claim 1, characterized in that, The preforming mechanism includes a first suction drive structure, a guide channel, a fine-tuning drive structure, and an adhesive application structure. The control mechanism for the preforming process folds and glues the edges of the cardboard blank to form a preliminary cardboard box shape, including: Based on the preset cardboard box modeling drawing, determine the size information of the cardboard box, and adjust the diameter of the guide channel according to the size information; The first suction drive structure is controlled to pick up the bottom plate of the cardboard blank and move it toward the guide channel, so that the guide channel folds the four side plates of the cardboard blank upwards to be perpendicular to the bottom plate; Detect and obtain the included angle information between each side plate and the bottom plate in the cardboard blank; Based on the included angle information, the fine-tuning drive structure is controlled to fine-tune the position of each side plate in the cardboard blank, and the adhesive application structure is controlled to apply tape at the junction of every two adjacent side plates to fix the position between the side plates and between the side plates and the bottom plate, thus forming a prototype of the cardboard box.

3. The control method for a paper packaging production line according to claim 1, characterized in that, The step of determining the adhesive coating quality test result for each of the face paper blanks based on the first image information includes: The first image information is preprocessed; Based on the preprocessed first image information, the adhesive coverage area of ​​the bottom surface and each side wing of the face paper blank is identified; The adhesive coverage rate of the bottom surface and each side wing is obtained based on the adhesive coverage area of ​​the bottom surface and each side wing in the face paper blank and the total area of ​​the area. If the adhesive coverage of the bottom surface is less than a preset first coverage threshold or the adhesive coverage of one of the side wings is less than a preset second coverage threshold, the adhesive coating quality test result of the face paper blank is marked as unqualified. When the adhesive coverage of the bottom surface is greater than or equal to the first coverage threshold and the adhesive coverage of all the side wings is greater than or equal to the second coverage threshold, the adhesive coating quality test result of the face paper blank is marked as qualified.

4. The control method for a paper packaging production line according to claim 3, characterized in that, After the step of marking the adhesive quality test result of the face paper blank as unqualified, the method further includes: The paper blanks that fail the adhesive coating test are then recoated with adhesive by a recoating mechanism. The third image information of the paper blank after the adhesive recoating process is re-acquired; Based on the third image information, determine the corresponding adhesive coating quality inspection result; If the glue coating quality test result is still unqualified, the corresponding face paper blank shall be rejected.

5. The control method for a paper packaging production line according to claim 1, characterized in that, The step of transferring the pre-formed cardboard box to the top of the face paper blank whose adhesive quality inspection result is qualified, and fine-tuning the position of the pre-formed cardboard box based on the positional relationship between at least two points in the pre-formed cardboard box and the face paper blank, and placing it on the face paper blank to form a pre-attached cardboard box, includes: The paper box prototype is transferred to the top of the face paper blank whose glue coating quality test result is qualified; Obtain the first set of coordinate information of two opposite vertices of the bottom plate in the paper box prototype in the preset direction, and the second set of coordinate information of two opposite vertices of the bottom surface in the face paper blank; Based on the first coordinate information group and the second coordinate information group, the position of the paper box prototype is finely adjusted so that the bottom plate of the paper box prototype is directly above the bottom surface of the paper blank; The pre-formed paper box is attached to the paper blank to form a pre-attached paper box.

6. The control method for a paper packaging production line according to claim 1, characterized in that, The bonding mechanism includes a flattening structure, a second suction driving structure, a first side bonding structure, and a second side bonding structure. The step of transporting the pre-attached cardboard box to the laminating mechanism and controlling the laminating mechanism to fold and laminate the four side wings of the face paper blank in the pre-attached cardboard box according to a preset laminating sequence includes: The flattening structure is controlled to press the top of the pre-attached paper box component so that the paper box prototype is pressed firmly onto the paper blank. The second suction drive structure is controlled to pick up the carton pre-attached part and enter the first side pressing structure, so that the first side pressing structure guides one of the pair of side wings of the face paper blank in the carton pre-attached part to fold upward; The first side pressing structure is controlled to press the side wing corresponding to the face paper blank against the outside of one pair of side plates of the paper box prototype; The second suction drive structure is controlled to drive the carton pre-attachment into the second side pressing, so that the second side pressing structure guides the other pair of side wings of the face paper blank in the carton pre-attachment to fold upward; The second side pressing structure is controlled to press the side wing corresponding to the face paper blank against the outside of the other pair of side plates of the paper box prototype.

7. The control method for a paper packaging production line according to claim 6, characterized in that, The bonding mechanism further includes a corner bonding structure, an edge bonding structure, and a shaping structure, wherein the two sides of the pair of side wings are provided with corner protectors, and the end of each side wing is provided with an edge protector; After the step of controlling the second side pressing structure to press the side wing corresponding to the face paper blank against the outside of the other pair of side plates of the carton prototype, the method further includes: The corner-attaching mechanism is controlled to fold the corner inward so that the corner is attached to the other pair of side wings respectively; The edge-fitting structure is controlled to fold the edge inward so that the edge is tightly attached to the inner side of the side panel corresponding to the paper box prototype. The shaping structure is controlled to extend into the interior of the paper box prototype for shaping.

8. The control method for a paper packaging production line according to claim 1, characterized in that, The step of classifying and cutting the finished paper box according to the second image information includes: Preprocessing is performed on the second image information from several different orientations; Based on the preprocessed second image information, a defect analysis is performed on the finished paper box to determine the defect detection result for each finished paper box. Based on the defect detection results, the finished paper boxes are classified and cut into smaller pieces.

9. The control method for a paper packaging production line according to claim 1 or 5, characterized in that, The step of fine-tuning the position of the pre-formed cardboard box based on the positional relationship between at least two points in the pre-formed cardboard box and the paperboard blank, and placing it on the paperboard blank to form a pre-attached cardboard box, includes: Based on the positional relationship between at least two points in the prototype paper box and the paper blank, the position of the prototype paper box is adjusted, and the current alignment duration of the adjustment of the prototype paper box and the cumulative alignment duration of the paper blank are recorded. When the current alignment time reaches the preset first timeout response time, the current paper box prototype is placed in the first buffer position for temporary storage and the current alignment time is cleared to zero. The position of the next paper box prototype and the current paper blank is then captured for fine adjustment, and the current alignment time is recorded and the cumulative alignment time is updated. When the cumulative alignment time reaches the preset second timeout response time, the current face paper blank is temporarily stored in the second buffer position, and the next face paper blank with the qualified glue coating quality test result is loaded, and the current alignment time and the cumulative alignment time are cleared to zero. When the current alignment time is less than the first timeout response time, the cumulative alignment time is less than the second timeout response time, and in response to the alignment completion command, the fine-tuned paper box prototype is placed on the face paper blank to form a paper box pre-attached part; wherein, the alignment completion command is used to indicate that at least two points in the paper box prototype and the face paper blank have been aligned.

10. A paper packaging production line, characterized in that, include: At least one memory; At least one processor; At least one program; The program is stored in the memory, and the processor executes at least one of the programs to implement the control method for a paper packaging production line as described in any one of claims 1 to 8.

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