Paper box pressing method, pressing mechanism and outer box production process

Abstract

The present application belongs to the technical field of packaging box processing, and discloses a paper box pressing method, which comprises the following steps: providing at least one roller with a circumferential surface, the circumferential surface being used to contact the edge of a box and roll along the edge, making the roller relatively roll with the edge of the paper box, and the two surfaces adjacent to the edge are not in contact with the circumferential surface of the roller; and keeping the roller and the edge in close contact when relatively rolling. Meanwhile, a pressing mechanism based on the method and an outer box production process using the pressing mechanism are also disclosed, which can improve the automation degree of the paper box pressing process and produce packaging boxes with sharper appearance.

Description

Technical Field

[0001] This invention belongs to the field of packaging box processing technology, and specifically relates to a corrugating method for paper boxes, a corrugating mechanism, and an outer box production process using the corrugating mechanism. Background Technology

[0002] For automated production solutions of fully openable packaging boxes, the three-sided cutting method is a preferred approach, which typically includes three main processes: making the inner box, making the outer box, and cutting the edges and taking the mold from three sides.

[0003] Currently, the inner box manufacturing process has solved problems such as the forming quality of the lining strip, the assembly quality of the lining strip and the floor cover, and the production speed of the inner box; the outer box manufacturing process has also solved problems such as the positioning of the inner box and the face paper, and the production efficiency of the outer box; while the cutting and molding process has only solved the problems of the cutting efficiency of the outer box and the cutting of the seams.

[0004] However, the inventor encountered quality problems when using this process to manufacture other similar box types. Upon investigation, it was discovered that the paper used in the original production line was too thin, resulting in shallow creases along the box's edges. Consequently, the formed edges of the outer box were too rounded, failing to meet the quality requirements of ordinary box types. Specifically, while this thin-paper box type could be manufactured using the same process as the thicker-paper box type, it required further manual edge scraping. The existing scraping method involves using a blunt blade to roughly scrape the edges of the box. This method easily scratches the box body and the paper, and requires manual operation. Summary of the Invention

[0005] Based on the above background, the technical problem to be solved by the present invention is to provide a corrugating method for paper boxes, which can sharpen the formed boxes of thin paper boxes based on the original forming process of thick paper boxes, so as to avoid scratches on the box body.

[0006] Another aspect of the present invention provides a corrugating mechanism suitable for corrugating requirements of various paper boxes, especially suitable for paper boxes with thinner face paper.

[0007] Another aspect of the present invention provides a production process using the corrugating mechanism, which optimizes the original production process of thick-sided cardboard boxes, with the aim of producing products with sharp edges at a lower cost.

[0008] The present invention is implemented as follows: a corrugating method for a paper box, firstly providing at least one roller having a circumferential surface for contacting the edge of the box and being able to roll or slide along the edge, wherein two adjacent surfaces of the edge do not contact the circumferential surface of the roller; so that the roller and the edge remain pressed together when rolling or sliding relative to each other.

[0009] Furthermore, after the edges of the cardboard box are rolled or slid over the circumferential surface, the surface where the edges of the cardboard box are located is flattened or rolled.

[0010] Furthermore, the box is moved along the conveyor path, and the drive rollers approach the edge of the box until they press against the edge.

[0011] Furthermore, the conveying path has two mutually perpendicular segments, and in each segment of the conveying path, the roller is driven to approach the edge of the box that is parallel to the conveying path.

[0012] Furthermore, elastic elements are provided around the periphery of the conveying path, and the rollers are driven by the elastic elements to adaptively press the edges of the box.

[0013] Furthermore, when the box and the roller roll or slide relative to each other, an angle is formed between the central axis of the roller and the top surface of the box, with the angle ranging from 0° to 90°.

[0014] The present invention also provides a pressing mechanism, comprising: a conveying path through which a box can pass; a roller having a circumferential portion; an elastic member connected to the roller, causing the roller to adaptively press against the edge of the box on the conveying path; at least one fixed seat disposed on the side of the conveying path, the elastic member connecting the roller and the fixed seat, such that before the elastic member undergoes elastic deformation, the circumferential portion of the roller extends into the conveying path in an inclined posture.

[0015] Furthermore, the roller also includes a main body portion, and the circumferential portion is disposed at one end of the main body portion. Along the main body portion toward the circumferential portion, the projected area of ​​the circumferential portion on a cross section perpendicular to the main body portion gradually increases.

[0016] Furthermore, it also includes a pressure plate, which is disposed around or on one side of the conveying path by another elastic element.

[0017] Furthermore, it also includes: a channel, in which a conveying path for the box to pass is formed, and a gap is provided in the area between the two ends of the channel; the roller extends into the area where the channel is located through the gap; and a drive unit that drives the box to move along the channel.

[0018] Furthermore, it also includes: a conveyor belt that moves along a conveyor path, the conveyor belt having a boss, wherein the width of the conveyor belt is smaller than the width of the box; the box is disposed on the conveyor belt and pushed by the boss.

[0019] Furthermore, the box includes at least two sets of edges in the same direction, and the conveying path includes at least two segments, each segment having the roller extending into the area where the conveying path is located.

[0020] This invention also provides a box manufacturing process using the aforementioned corrugating mechanism, comprising: providing a sheet material for box packaging; applying adhesive to the sheet material via a gluing mechanism to obtain a coated sheet material; moving the coated sheet material via a conveyor belt; providing an inner box material to the coated sheet material; identifying feature points on the coated sheet material using a vision recognition system; directly grabbing and pressing the inner box material onto the coated sheet material using a robotic arm to obtain an adhesive body; bonding the remaining unbonded sheet material portions of the adhesive body to the inner box material to form a first outer box; conveying the first outer box to a corrugating mechanism via a conveyor path for corrugating to obtain a second outer box; and sending the second outer box into a bubble defoamer for shaping and defoaming to obtain a finished box.

[0021] The above scheme has the following significant improvements:

[0022] (1) The present invention provides a corrugating method for paper boxes, which uses the circumferential surface of a roller to roll and press the edges of the paper box to make the edges of the paper box sharper. This method can avoid scratching the paper box products.

[0023] (2) The corrugating mechanism provided by the present invention uses the circumference of a roller to roll the edges of the paper box, making the edges of the paper box sharper. This method can avoid scratching the paper box product.

[0024] (3) The pressing mechanism is relatively simple and has a wider range of applications. It occupies little space and is easy to operate on an assembly line.

[0025] (4) The present invention provides a production process using the pressing mechanism. In the outer box production process, the pressing mechanism described above can optimize the process with a small modification cost, and the produced outer box edges are sharper and the product has high uniformity. Attached Figure Description

[0026] Figure 1 This is a schematic diagram illustrating the principle of the rib-pressing method in Embodiment 1 of the present invention;

[0027] Figure 2 This is a schematic diagram illustrating the principle of the efficient corrugating method in Embodiment 2 of the present invention;

[0028] Figure 3 This is a schematic diagram illustrating the principle of another pressing method in Embodiment 3 of the present invention;

[0029] Figure 4 This is a schematic diagram of another configuration of the roller in Embodiment 1 of the present invention;

[0030] Figure 5 This is a schematic diagram of the conveying path in Embodiment 2 of the present invention;

[0031] Figure 6 This is a schematic diagram of the conveying path in Embodiment 3 of the present invention;

[0032] Figure 7 This is a schematic diagram of the pressing mechanism in Embodiment 4 of the present invention;

[0033] Figure 8 for Figure 7 Assembly structure diagram of the medium-pressure ribbed mechanism on the production line;

[0034] Figure 9 This is a structural diagram of the roller in Embodiment 5 of the present invention;

[0035] Figure 10 This is a structural diagram of the pressing mechanism in Embodiment 5 of the present invention;

[0036] Figure 11 This is a structural diagram of the conveyor belt in Embodiment Six of the present invention;

[0037] Figure 12 This is a schematic diagram of the structure of Embodiment Seven of the present invention;

[0038] Figure 13 This is a process flow diagram from Embodiment 8 of the present invention; Detailed Implementation

[0039] The specific embodiments of the present invention will be further described below with reference to the accompanying drawings. It should be noted that these descriptions are for the purpose of aiding understanding the present invention, but do not constitute a limitation thereof. Furthermore, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0040] Example 1:

[0041] Figure 1 A schematic diagram showing the working relationship between the paper box and the roller 20 is shown.

[0042] The inside of the cardboard box is an inner box 10, which is a three-dimensional model made of an inner mold and a relatively stiff paper material used for the inner box. The outer paper 11 is tightly attached to the outer surface of the inner box.

[0043] Roller 20 has at least one circumferential surface, such that the axis of roller 20 has a certain angle between the two surfaces on the paper plane and the corresponding edge of the paper box.

[0044] When the cardboard box is stationary on the working plane, the drive roller 20 can roll or slide along the edge 11a of the cardboard box, making the edge 11a closely fit the corner of the inner box. The imprint on the edge 11a becomes more pronounced under the combined action of internal and external forces. Similarly, the cardboard box can also move on the working plane, while the roller 20 is fixed to the working plane and driven by elastic components such as springs, giving the roller 20 a slight adaptive deformation. There is a certain angle between the axis of the roller 20 and the working plane. The cardboard box can be driven by a conveyor belt or a cylinder pusher structure pushing the cardboard box forward on the fixed plane. When the box contacts the roller 20, its edge 11a rolls or slides relative to the roller 20. The roller 20 retracts after slightly contacting the outline of the cardboard box, and the box continues to pass, completing the corrugation of that edge. Boxes corrugated by this mechanism have sharper edges, better quality, and a more aesthetically pleasing appearance.

[0045] The main visual components of a cardboard box are the edges of its top and bottom surfaces. Since these edges are relatively short, quality is typically judged based on the visual appearance of these main components in the forming quality control standards. To achieve efficient corrugating of the top and bottom edges: when the cardboard box is stationary, the rollers can be configured as moving mechanisms that travel along the perimeter of the box to achieve corrugating along each edge; when the cardboard box moves on the working plane while the rollers are fixed to the perimeter of the box's conveying path, two mutually perpendicular conveying paths can be configured. One conveying path corrugates the long side of the roller, while the other corrugates the short side.

[0046] The connection between the roller and the edge of the cardboard box in the diagram can be: a fixed roller shaft to provide a fixed circumferential portion to the edge of the cardboard box, with relative sliding between the edge and the circumferential portion; or a roller shaft that rotates around an axis to provide a rotating circumferential portion to the edge of the cardboard box, with relative rolling between the edge and the circumferential portion.

[0047] The roller can be configured as follows: a roller having a circumference at least at some point on its body, or a single circular roller as a whole. For example... Figure 3-4 This is achieved using a uniquely designed roller, which includes a main body 31 and tapered portions 32 located at both ends of the main body 31. The main body 31 can be in the form of a circular roller or a square roller, while the cross-section of the tapered portions 32 gradually increases outwards from both ends. With its central axis as a reference, when this axis is parallel to the upper / lower bottom surface of the cardboard box, it provides two inclined circumferential portions that can roll or slide relative to the edges of the cardboard box, thereby achieving the purpose of the present invention. For example... Figure 2 This is achieved in the form of a conventional single small roller, which is easy to obtain without requiring a customized shape, and can also achieve the purpose of the present invention.

[0048] Furthermore, after achieving the objectives of this invention, additional technical problems may arise: borrowing Figure 2After the edges of the cardboard box are rolled by roller 20, bulges may form. Therefore, the edges of the cardboard box can be flattened by using a pressure plate or by using a roller to smooth the entire surface to achieve better quality.

[0049] Example 2

[0050] See Figure 2 and 5 The paper also shows a relatively efficient corrugating mechanism, in which four rollers 20 are set on a fixed workbench. The four rollers are all inclined and their relative positions are configured as follows: each roller 20 corresponds to one of the four edges 11a on the paper box, and each roller forms a certain angle with the two faces of the corresponding edge. The projection of the four rollers 20 on the paper plane is arranged around the conveying path X of the paper box and forms a channel. The box passes through the channel, thus achieving corrugation of the four edges at the same time.

[0051] The four rollers can be arranged along a common plane determined by the center lines of the four axes, or they can be arranged at intervals along the X-axis of the box's conveying path.

[0052] Then, it enters another conveyor path Y, which has channels set up according to the same principle. The two paths are perpendicular to each other, and this channel presses the other four edges. Thus, the main edges on the top and bottom surfaces of the box can be efficiently pressed along the entire conveyor path, making it more suitable for assembly line production. Alternatively, two sets of rollers can be set at intervals along a conveyor path to form channels. After the carton passes through the first channel, the rollers are rotated 90° at the middle interval before entering the next channel.

[0053] Example 3

[0054] See Figure 3 and Figure 6 Another, more efficient corrugating mechanism is also shown, in which the uniquely designed conical rollers are set on the upper and lower bottom surfaces of the box conveying path, and the two rollers generally form a channel for the box to pass through. In this case, the box conveying path is still set as in embodiment two. When the carton passes through conveying path X, its four edges are corrugated, and then it continues to pass through conveying path Y while maintaining the same posture, and the other four edges are corrugated.

[0055] Example 4

[0056] Combination Figure 3 , 6 and 7, Figure 7 The specific structure of this type of embossing mechanism is shown in the figure.

[0057] First, the pressing mechanism includes:

[0058] Mounting block 40, which has mounting holes;

[0059] The elastic element 50 includes a bolt and a spring, with the spring sleeved on the outside of the shank in the bolt;

[0060] The tapered roller 30 includes a roller body 31 and tapered portions 32 located at both ends. The cross-sectional area of ​​the tapered portions 32 gradually increases outward from both ends along the roller axis and gradually decreases inward until it is the same as the cross-section of the roller body 31. Connecting portions 33 protrude from both ends of the tapered portions 32, and the connecting portions are provided with through holes that cooperate with bolt shanks.

[0061] The bolt is equipped with a nut for adjusting the compression amount. The distance between the two conical rollers 32 is preset by the nut, and a channel for the box to pass through is formed between the two conical rollers.

[0062] When the box is pushed into the channel, the four edges 11a of the box are tangent to the cone 31. The cone is pressed tightly against the edges of the box under the pressure of the spring. When the cone rolls over the length of the edge, the pressing of the box is completed.

[0063] Secondly, the corrugating mechanism also includes a pressure plate 60, which is also provided with through holes and is spring-pressed on the shank of the bolt; the two pressure plates 60 are connected downstream of the two rollers along the conveying direction. After the box passes through the corrugation, the face paper forms an arched bulge, which can be directly re-pressed by the pressure plate 60 to fit the inner box, resulting in a product box with better performance.

[0064] Figure 8 The assembly relationship of the embossing mechanism in the equipment is revealed. The vertical rotary forming machine in the figure is an upright rotary forming fixture. The rotary table 70 is provided with equally spaced material storage grooves. A volute is fitted over the rotary table, and the rotary table rotates while the volute remains stationary. The embossing mechanism is fixed to the frame of the equipment by a connector 41, with one end aligned with the discharge port. After each material storage groove, carrying the workpiece to be processed, is completed at the corresponding station, it will move to the next station for processing. In the figure, a cylinder 71 is installed on the side volute of the discharge port 72. After the outer box is initially formed, the rotary table rotates with the outer box to the discharge port 72, and the cylinder pushes it directly along the side of the discharge port, so that the box enters the channel between the conical rollers 30 for embossing.

[0065] Example 5

[0066] Combination Figure 1 , 2 5, 9 and 10, Figure 9-10 The specific structure of the scheme is shown.

[0067] The corrugating mechanism provided in this solution is configured with a circumferential surface that forms a certain angle with the edge of the carton. Specifically, one end of the roller is controlled by a spring 21, while the other end of the roller 20 is slightly inclined, hinged to the fixed base.

[0068] The cardboard box moves along the X-axis conveying path. The corrugating mechanism is set on both sides of the middle section of the conveying path. The four edges of the cardboard box that are parallel to the X-axis conveying path are rolled by rollers 20. The conveying path includes a channel with clearance openings 23. The rollers that roll the bottom edges of the cardboard box extend into the conveying path of the cardboard box through the clearance openings 23.

[0069] like Figure 8 As shown, spring 21 is preferably a hook spring. Roller 20 can be configured such that one end has a circumferential portion, the other end has a locking hole, and the middle is hinged to a fixed seat via a pin. The hook spring is hooked to the fixed seat via the locking hole. When the hook spring is in its original length state, a certain angle α (between 0° and 90°) is maintained between roller 20 and the top surface of the carton, and this is configured on all four sides of the carton.

[0070] When the box is conveyed along the conveyor path and reaches the roller 20, the box contacts the circumference of the roller 20 and squeezes the roller 20 to rotate around the hinge 22. The other end of the locking hole pulls the hook spring to extend. The hook spring undergoes a slight elastic deformation, so that the box always maintains the pressed state between the roller and the edge when passing through the pressing mechanism.

[0071] Example 6

[0072] Combination Figure 10 and Figure 11 The present invention also provides a creasing mechanism, including the scheme described in Embodiment 2, but the conveying mechanism set on its conveying path is a special conveyor belt. The conveyor belt 90 moves along the conveying path, and the conveyor belt is provided with a boss 91. The width of the conveyor belt 90 is smaller than the width of the box. Rollers 20 as shown in Embodiment 5 are set on both sides. Because the width of the conveyor belt 90 is smaller, it avoids the rollers 20. When the box is pushed by the boss 91 along the channel between the rollers, creasing is achieved.

[0073] The conveyor belt 90 is composed of individual chain blocks 92 linked together. The width of the boss 91 is less than or equal to the width of the chain block 92. The conveyor belt 90 is driven by a motor.

[0074] Example 7

[0075] Combination Figure 4 and Figure 12 The present invention also provides a corrugating mechanism, the roller comprising a main body 31 and conical portions 32 located at both ends of the main body 31. The main body 31 may be in the form of a circular roller or a square roller, and the cross-section of the conical portions 32 gradually increases outward from both ends. The box is pushed in the same manner as shown in Embodiment Six, moving the box using this special conveyor belt. With its central axis as a reference, when the axis is parallel to the left and right sides of the box, two inclined circumferential portions can be provided to roll or slide relative to the edges of the box, thereby achieving the purpose of the present invention.

[0076] Example 8

[0077] The present invention also provides a manufacturing process for an outer box, comprising:

[0078] - The incoming face paper 81 is coated with adhesive using a roller or screen printing gluing machine to obtain coated face paper 82.

[0079] - The adhesive-coated paper 82 moves on the conveyor belt. Using visual recognition, the robot arm grabs the inner box 83 and presses it directly onto the adhesive-coated paper 82 to form an adhesive body 84.

[0080] - The adhesive 84 continues to be conveyed to the vertical rotary forming machine to form the unattached face paper and inner box into the first outer box 85.

[0081] - The first outer box 85 is ejected from the vertical rotary forming machine and enters the corrugating mechanism for corrugating to obtain the second outer box 86.

[0082] -Then send the second outer box 86 into the bubble depresser for bubble depressing.

[0083] The production line for implementing this process includes the following equipment:

[0084] -A device for applying adhesive to one side of the tissue paper 81.

[0085] -A device for laying the adhesive-coated paper 82 flat on the conveyor line and positioning it, then attaching one side of the inner box 83 to the adhesive-coated paper 82.

[0086] -A device for further processing the inner box and the outer paper adhesive 84 to bond the outer paper to the remaining surface of the inner box, forming the first outer box 85.

[0087] - The second outer box 86 is obtained by pressing the first outer box 85 after the veneer is formed using the mechanism in the above embodiment.

[0088] -A device for pressing and foaming the 86mm thick surface of the second outer box.

[0089] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and are not intended to 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 invention.

[0090] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0091] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A pressing mechanism, characterized in that, include: The transport path through which the cardboard box can pass; A roller with a circumferential portion; the roller includes a main body and tapered portions located at both ends of the main body. The main body is in the form of a round roller or a square roller, and the cross-section of the tapered portions gradually increases outward from both ends. With its central axis as a reference, when the axis is parallel to the upper / lower bottom surface of the carton, it can provide two inclined circumferential portions to roll or slide relative to the edge of the carton. An elastic element connected to the roller causes the roller to adaptively press against the edges of the carton on the conveying path; At least one fixed seat is disposed on the side of the conveying path, and the elastic element connects the roller and the fixed seat, so that the circumferential portion of the roller extends into the conveying path in an inclined posture before the elastic element undergoes elastic deformation. The inside of the cardboard box is the inner box, which is made of an inner mold and a paper material with high stiffness. The outer paper is tightly attached to the outer surface of the inner box. The cardboard box moves along the conveyor path, and the rollers are fixed around the perimeter of the cardboard box's conveyor path. Rollers are set on the upper and lower bottom surfaces of the paper box conveying path, and a channel for the paper box to pass through is formed between the two rollers; When the cardboard box is pushed into the channel, its four edges are tangent to the cone.

2. The pressing mechanism according to claim 1, characterized in that, Also includes: The pressure plate is located around or on one side of the conveying path via another elastic element.

3. The pressing mechanism according to claim 1, characterized in that, Also includes: The passage has a conveying path through which cardboard boxes can pass, and there are gaps in the area between the two ends of the passage. The roller extends through the notch into the area where the channel is located; A drive unit that drives the cardboard box to move along the channel.

4. The pressing mechanism according to claim 1, characterized in that, Also includes: A conveyor belt that moves along a conveyor path, the conveyor belt having protrusions, wherein the width of the conveyor belt is smaller than the width of the cardboard box; The cardboard box is positioned on the conveyor belt and pushed by the boss.

5. The pressing mechanism according to claim 1, characterized in that: The cardboard box includes at least two sets of edges in the same direction. The conveying path includes at least two segments, each segment having the roller extending into the area where the conveying path is located.

6. A box manufacturing process using the corrugating mechanism as described in any one of claims 1-5, characterized in that: We provide paper sheets for inner boxes of bags, and then apply glue to the paper sheets through a gluing mechanism to obtain glued paper sheets. The inner box material is supplied to the coated paper by moving the coated paper via a conveyor belt. The feature points on the coated paper are identified by a vision recognition system. The inner box material is directly grabbed and pressed onto the coated paper by a robotic arm to be pasted together to obtain an adhesive body. The remaining unbonded paper portions on the adhesive body are then bonded to the inner box to form the first outer box. The first outer box is conveyed to the corrugating mechanism via a conveying path to be corrugated to obtain the second outer box; The second outer box is sent into a bubble deflator for shaping and defoaming to obtain the finished box.

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