A packaging box forming mechanism

Abstract

A kind of packaging box forming mechanism, comprising: relatively arranged die and forming die;The forming die includes bottom plate and first side plate, third side plate, second side plate and fourth side plate that are sequentially arranged in the periphery of the bottom plate, and the cavity of the forming die is enclosed;The die can be moved into the cavity of the forming die;The first side plate is provided with third folding inclined plane that is inclined downward and towards the inside of the forming die;The second side plate is arranged opposite to the first side plate and is the same structure;The both ends of the third side plate are respectively provided with extension from the top of the third side plate, and the extension is provided with first folding inclined plane that is inclined downward and towards the inside of the forming die;The third side plate is also provided with second folding inclined plane that is inclined downward and towards the inside of the forming die;The second folding inclined plane is below the first folding inclined plane;The fourth side plate is arranged opposite to the third side plate and is the same structure.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of automation equipment, and particularly relates to a forming mechanism of a paper packaging box. BACKGROUND

[0002] In order to prevent household appliances from being damaged during transportation, manufacturers usually use packaging boxes to protect the appliances, such as some air conditioner products which are packaged with a bottom support and a top cover and then put into a packaging box. The packaging box such as the bottom support / top cover is generally made of paper skin, and after the side edge of the paper skin is folded, the folded edge is fixed by nailing or pasting to form a box body with one side opening. A box body has multiple folded edges, and using manual operation, three folding actions and one nailing action are required to form an angle, which is complicated, labor-intensive and low in efficiency. SUMMARY

[0003] The present application aims to provide a packaging box forming mechanism capable of completing the folding edge forming at one time, which can replace manual operation and is high in efficiency.

[0004] In order to achieve the above-mentioned purpose, the present application adopts the following technical solutions:

[0005] A packaging box forming mechanism comprises:

[0006] Oppositely arranged pressing die and forming die;

[0007] The forming die comprises a bottom plate and a first side plate, a third side plate, a second side plate and a fourth side plate which are sequentially arranged around the bottom plate and enclose a cavity of the forming die; the pressing die is movable into the cavity of the forming die;

[0008] The first side plate is provided with a third folding inclined surface which is downwardly inclined and faces the inner side of the forming die; the second side plate is oppositely arranged with the first side plate and has the same structure;

[0009] The third side plate is provided with an extension part extending upward from the top of the third side plate at both ends thereof, and the extension part is provided with a first folding inclined surface which is downwardly inclined and faces the inner side of the forming die; the third side plate is further provided with a second folding inclined surface which is downwardly inclined and faces the inner side of the forming die, and the second folding inclined surface is located below the first folding inclined surface; the fourth side plate is oppositely arranged with the third side plate and has the same structure.

[0010] From the above technical scheme can know, the forming mechanism of the application includes a movable press mold and a forming mold for paper skin forming, the forming mold is provided with different folding slopes, in the process of the paper skin being pressed into the cavity of the forming mold by the press mold, the paper skin will sequentially contact the folding slopes with different heights, the different folding slopes fold the edges of the paper skin correspondingly, when the press mold is moved to the position, the four corner folding angles of the packaging box can be realized at one time, compared with the manual edge folding operation, the action process is simple, can be automatically completed by the forming mechanism, the automation degree is high, the workload of the operating personnel is effectively reduced, the labor intensity is reduced, and the efficiency is improved.

[0011] The packaging box forming mechanism as described above, optionally, the third folding slope is downwardly inclined from the top of the first side plate;

[0012] And / or, the first folding slope is downwardly inclined from the top of the extension;

[0013] And / or, the second folding slope is downwardly inclined from the top of the third side plate.

[0014] The packaging box forming mechanism as described above, optionally, the height of the second folding slope is lower than the height of the third folding slope;

[0015] Or, the height of the second folding slope is consistent with the height of the third folding slope.

[0016] The packaging box forming mechanism as described above, optionally, the first side plate is further provided with a fourth folding slope downwardly inclined and towards the inner side of the forming mold, and the fourth folding slope is below the third folding slope.

[0017] Two folding slopes are provided on the same side plate, through twice folding of the two folding slopes, deformation of the folding edge in the process of downward folding can be avoided when the folding edge is relatively long, the flatness of the folding edge is improved, and the folding effect is ensured.

[0018] The packaging box forming mechanism as described above, optionally, a vertical transition surface is arranged between the third folding slope and the fourth folding slope, and the vertical transition surface is perpendicular to the bottom plate.

[0019] The vertical transition surface is arranged below the folding slope, which is beneficial to strengthen the folding effect of the folding slope and avoid deformation of the folding edge.

[0020] The packaging box forming mechanism as described above, optionally, the height of the second folding slope is lower than the height of the fourth folding slope;

[0021] Or, the height of the second folding slope is consistent with the height of the fourth folding slope.

[0022] When the folding slopes on different side plates have height differences, the paper skin will pass through different folding slopes in turn during the paper skin pressing process, so that the pressure on the paper skin can be reduced, and the paper skin can be prevented from being deformed or damaged.

[0023] The packaging box forming mechanism as described above, optionally, the inclination angle of the fourth folding slope is 30-70°.

[0024] The packaging box forming mechanism as described above, optionally, the inclination angle of the first folding slope is 30-70°.

[0025] And / or, the inclination angle of the second folding slope is 30-70°.

[0026] And / or, the inclination angle of the third folding slope is 30-70°.

[0027] When the inclination angle of each folding slope is set to 30-70°, the height of the forming die caused by the large stroke of the pressed folding edge when the inclination angle of the folding slope is too large can be avoided, and the large volume of the forming die can be avoided, which is beneficial to reduce the space volume of the forming mechanism, and can also avoid the conditions that the thickness of the side wall of the forming cavity is thin, the strength is not enough, and the forming cavity is easily damaged. Moreover, the deformation or damage of the paper skin caused by the small stroke of the pressed folding edge and the large pressure of the pressed paper skin when the inclination angle of the folding slope is too small can also be avoided.

[0028] The packaging box forming mechanism as described above, optionally, the pressing die is a plate body, and the two ends of the pressing die are provided with folding edge limiting portions for abutting against the folding edges of the paper skin. When the pressing die moves into the forming die, the folding edge limiting portions are opposite to the third side plate and the fourth side plate, respectively.

[0029] The packaging box forming mechanism as described above, optionally, the vertical cross-sectional shape of the folding edge limiting portion is a half I-shaped, and the side opposite to the folding edge of the folding edge limiting portion forms a clearance for avoiding nails.

[0030] The packaging box forming mechanism as described above, optionally, the folding edge limiting portion has a flange extending downward from the top, and the folding edge of the paper skin abuts against the flange.

[0031] The folding edge limiting portion is provided, and the folding edge limiting portion can abut against the folded and overlapped folding edges, so that the overlapped folding edges can be kept perpendicular to the bottom plate. When the nails are driven, the folding edges can be prevented from not being overlapped together, so that the driving of the nails is not failed, the driving device can effectively drive the nails, and the yield of the packaging box products can be improved.

[0032] The packaging box forming mechanism as described above, optionally, further comprises a nailing device, the nailing device is arranged on the third side plate and the fourth side plate, and the third side plate and the fourth side plate are provided with a nailing hollow for the nails shot by the nailing device to pass through.

[0033] The nailing device is integrated on the forming die, and the nailing device can be started automatically after the folding of the packaging box is completed, so that the folding and nailing processes of the packaging box are completed at one time, and the efficiency is high.

[0034] The packaging box forming mechanism as described above, optionally, the four corner positions of the pressing die are provided with emptying notches corresponding to the nailing hollows.

[0035] The packaging box forming mechanism as described above, optionally, the pressing die is provided with an adsorption component for adsorbing the paper cover.

[0036] The packaging box forming mechanism as described above, optionally, the adsorption component is a suction cup, the pressing die is provided with a suction cup mounting bracket for mounting the suction cup, the pressing die is provided with a through hole, and the suction cup is exposed to the bottom surface of the pressing die through the through hole.

[0037] The paper cover adsorption component is arranged on the pressing die, the pressing die can also play a role in carrying, can complete the grabbing and prevention of the material, and makes the manufacturing process of the packaging box more smooth. BRIEF DESCRIPTION OF DRAWINGS

[0038] In order to more clearly illustrate the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor.

[0039] Figure 1 It is a structural schematic view of a packaging box;

[0040] Figure 2 It is Figure 1 It is a folding step schematic view of the packaging box shown;

[0041] Figure 3 It is a structural schematic view of the packaging box forming mechanism of the embodiment 1 of the present application;

[0042] Figure 4 It is a top view of the packaging box forming mechanism of the embodiment 1 of the present application;

[0043] Figure 5 It is Figure 4 It is a sectional view along the line A-A in the figure;

[0044] Figure 6 It isFigure 5 A sectional view of the middle B-B line;

[0045] Figure 7 A schematic view of a packaging box after the first edge folding by the packaging box forming mechanism according to the embodiment of the present application;

[0046] Figure 8 A schematic view of a packaging box after the second edge folding by the packaging box forming mechanism according to the embodiment of the present application;

[0047] Figure 9 A flow chart of the steps of the packaging box forming by the packaging box forming mechanism according to the embodiment of the present application.

[0048] The specific embodiments of the present application are further described in detail below with reference to the accompanying drawings.

[0049] Explanation of the reference signs:

[0050] 10 - paper 100 - bottom surface 101 - first edge folding 102 - second edge folding

[0051] 103 - third edge folding 101a - folding cutting line

[0052] 1 - press mold 1a - through hole 1b - emptying notch 1-1 - suction cup mounting support

[0053] 1-2 - edge folding limiting part 1-2a - flange

[0054] 2 - forming mold 2-1 - first side plate 2-2 - second side plate 2-3 - third side plate

[0055] 2-4 - fourth side plate 2-5 - bottom plate 2-5a - waste hollowing 2-6 - extension

[0056] s1 - first folding inclined surface s2 - second folding inclined surface s3 - third folding inclined surface

[0057] s4 - fourth folding inclined surface s5 - vertical transition surface Q - nailing hollowing DETAILED DESCRIPTION

[0058] The application will be described in detail below with reference to the drawings. In the detailed description of the embodiments of the application, the drawings of the device structure are partially enlarged without the general proportion for the convenience of illustration, and the schematic diagram is only an example which should not limit the scope of protection of the application. It should be noted that the drawings are simplified and all use non-precise proportions, only for the purpose of facilitating and clearly assisting the description of the embodiments of the application. Meanwhile, in the description of the present application, the terms "first", "second", etc. are only used for differentiation, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features; the terms "positive", "negative", "bottom", "upper", "lower", etc. indicate the orientation or positional relationship shown in the drawings, only for the convenience of describing the application and simplifying the description, and therefore cannot be understood as limiting the application, which indicates or implies that the indicated device or element must have a specific orientation, be constructed and operated in a specific orientation.

[0059] In the description of the application, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected", "connected" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements, it can be wireless connection, or it can be wired connection. For those skilled in the art, the specific meaning of the above terms in the application can be understood according to the specific circumstances.

[0060] Figure 1 The shown is a packaging box for electrical products such as air conditioners, one end of which is open. The packaging box has a bottom surface 100 and four edges around the bottom surface 100. The two edges of the four edges are opposite to each other, and the edges and the bottom surface 100 are integrally connected. After the edges are folded to be perpendicular to the bottom surface 100 and fixed, the packaging box is made.

[0061] Figure 1 The shown packaging box is a rectangular packaging box, that is, among the two opposite edges, there is a pair of long edges 101 with relatively long length and a pair of short edges 102 with relatively short length compared with the long edges 101. For the convenience of description, the long edges 101 are defined as first edges, and the short edges 102 are defined as second edges. In other embodiments, the packaging box can also be a square packaging box, that is, the four edges are equal in length.

[0062] Figure 1 The shown packaging box has two opposite first edges 101 and two opposite second edges 102. The first edges 101 and the second edges 102 are adjacent to each other, and the first edges 101 and the second edges 102 are connected together through third edges 103. Figure 1In the packaging box shown, the third fold 103 and the first fold 101 are connected as one piece. After folding the third fold 103, a 90° angle is formed between the first fold 101 and the third fold 103, and the third fold 103 overlaps with the second fold 102. Then, nails are driven into the overlapping area of ​​the third fold 103 and the second fold 102 using a nail gun, thereby connecting the first fold 101 and the second fold 102 together to form the box body. For aesthetic purposes, the third fold 103 is generally located inside the second fold 102.

[0063] Figure 2 To be made by manual operation Figure 1 The diagram shows the process of making the box. The box is made of folded cardboard. When the material arrives, the cardboard is pre-processed with a folding cut line 100a. The length of the folding cut line 100a is equal to the length of the third fold and the width of the second fold.

[0064] like Figure 2 As shown, firstly, along the folding line 100a, the first fold 101 is folded until it is perpendicular to the bottom surface 100. At this time, the third fold 103 is not yet folded. Since the third fold 103 is connected to the first fold 101, after the first fold 101 is folded, the third fold 103 is also folded until it is perpendicular to the bottom surface 100. Then, the third fold 103 is folded until it is perpendicular to the first fold 101, forming a 90° angle between the first fold 101 and the third fold 103. The second fold 10... Fold the second edge 102 to be perpendicular to the bottom surface 100. Since the second edge 102 is adjacent to the first edge 101, the second edge 102 is also perpendicular to the first edge 101. The third edge 103 is folded before the second edge 102, so the third edge 103 is located inside the second edge 102. The two ends of the second edge 102 overlap with the third edge 103. After nailing the area where the second edge 102 and the third edge 103 overlap, the three edges are fixed together to form a box with an open top.

[0065] As can be seen from the folding process above, a box has 4 right angles, and each right angle requires at least 2 to 3 steps to fold. After folding, nails are also needed at each right angle to connect the adjacent folded edges. Therefore, it takes at least ten manual operations to complete the production of a box, which is a lot of steps and inefficient.

[0066] To improve the efficiency of packaging box production, the inventor proposed a packaging box forming mechanism that folds cardboard into shape through a pressing film and forming mold, and can be used with a nailing device such as a nail gun to automatically nail the box, completing the folding and nailing of the packaging box in one go, thereby improving the automation and efficiency of packaging box production.

[0067] The present invention will be further described below through specific embodiments. The various embodiments are described in a progressive manner, with each embodiment focusing on its differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably.

[0068] Example 1

[0069] like Figure 3 , Figure 4 , Figure 5 and Figure 6 As shown ( Figure 5 , Figure 6 (The folded cardboard is omitted in this embodiment). The packaging box forming mechanism in this embodiment includes a pressing mold 1 and a forming mold 2 arranged opposite to each other. The pressing mold 1 in this embodiment is plate-shaped and is movably positioned above the forming mold 2. The forming mold 2 has a cavity (forming cavity) inside, and the pressing mold 1 can move into the cavity of the forming mold 2 when it moves vertically. The internal dimensions of the cavity of the forming mold 2 are adapted to the external dimensions of the packaging box, and the size of the pressing mold 1 is adapted to the bottom surface of the packaging box, which can be equal to or slightly smaller than the bottom surface of the packaging box. Thus, the pressing mold 1 can press the cardboard into the cavity of the forming mold 2 to form the box.

[0070] The pressing mold 1 can be connected to a robotic arm (not shown) and move up and down under the control of the robotic arm. The cardboard 10 to be folded is located between the pressing mold 1 and the forming mold 2. When the pressing mold 1 moves downward, it can press the cardboard 10 into the forming mold 2 to form a packaging box.

[0071] To improve the efficiency of packaging box production, preferably, the pressing mold 1 in this embodiment is also equipped with a suction cup (not shown), which is connected to an external vacuum source, such as a vacuum pump or a negative pressure pump. As an adsorption component for cardboard, the suction cup can hold the cardboard to be folded, move the cardboard from the preparation area to above the forming mold 2, and then press down the pressing mold 1 to form a packaging box.

[0072] like Figure 3 As shown, in this embodiment, the pressing mold 1 is provided with a suction cup mounting bracket 1-1. The suction cup is fixed on the suction cup mounting bracket 1-1 and passes through the through hole 1a on the pressing mold 1, protruding from the bottom surface of the pressing mold 1. When making the packaging box, the robot controls the pressing mold 1 to move to the material preparation area where the cardboard is placed. After the cardboard is attracted by the suction cup, the robot controls the pressing mold 1 to return to the top of the forming mold 2, and then presses the cardboard downward into the forming mold 2 to fold the packaging box.

[0073] The upper end of the forming die 2 is open, so that the compression die 1 can be pressed into the cavity of the forming die 2 from top to bottom. The forming die 2 of the embodiment comprises a first side plate 2-1, a second side plate 2-2, a third side plate 2-3, a fourth side plate 2-4 and a bottom plate 2-5, wherein the first side plate 2-1 and the second side plate 2-2 are oppositely arranged, the third side plate 2-3 and the fourth side plate 2-4 are oppositely arranged, and the four side plates are all perpendicular to the bottom plate 2-5. The cavity of the forming die 2 is formed by two oppositely arranged side plates. The side plates of the embodiment are connected together with the bottom plate 2-5 by threaded fasteners. Figure 6 The forming die 2 is a symmetrical structure, that is, the first side plate 2-1 and the second side plate 2-2 arranged oppositely have the same structure, and the third side plate 2-3 and the fourth side plate 2-4 arranged oppositely have the same structure. The length of the first side plate 2-1 and the second side plate 2-2 of the embodiment is greater than the length of the third side plate 2-3 and the fourth side plate 2-4, and the forming die 2 has a cuboid structure with a cavity inside.

[0074] Since the first side plate 2-1 and the second side plate 2-2 have the same structure, and the third side plate 2-3 and the fourth side plate 2-4 have the same structure, the structure of the forming die 2 will be described below by taking the first side plate 2-1 and the third side plate 2-3 as examples. The structure of the second side plate 2-2 and the fourth side plate 2-4 can be referred to the structure description of the first side plate 2-1 and the third side plate 2-3.

[0075] The embodiment is provided with an extension 2-6 vertically extending upward from the top of the third side plate 2-3 at both ends of the third side plate 2-3, and the top of the extension 2-6 is provided with a first folding inclined surface s1 inclined downward, and the first folding inclined surface s1 faces the inside of the forming die 2. The first folding inclined surface s1 is used for folding the third folding edge of the packaging box. In order to facilitate the description, the included angle (acute angle) between the folding inclined surface and the bottom plate 2-5 is defined as the inclination angle of the folding inclined surface, and the inclination angle of the first folding inclined surface s1 can be 30-70°, that is, the included angle between the first folding inclined surface s1 and the bottom plate 2-5 can be 30-70°.

[0076] One extension 2-6 is arranged at each side of the third side plate 2-3, and one extension 2-6 is arranged at each side of the fourth side plate 2-4, and the first folding inclined surfaces s1 on the four extensions 2-6 are oppositely arranged in pairs. During the downward pressing of the paper cover 10 by the compression die 1, the first folding inclined surfaces s1 on the extensions 2-6 can fold the four third folding edges, and the third folding edges located at both ends of the first folding edge are folded to be perpendicular to the first folding edge.

[0077] A second folding slope s2 is arranged on the top of the third side plate 2-3, and the second folding slope s2 is inclined downward from the top of the third side plate 2-3 and faces the inner side of the forming die 2. The second folding slope s2 is used to fold the second flange of the packaging box. The inclination angle of the second folding slope s2 can be 30-70°. Similarly, a second folding slope s2 is arranged on the top of the fourth side plate 2-4, and the second folding slope s2 on the third side plate 2-3 and the second folding slope s2 on the fourth side plate 2-4 are opposite.

[0078] A third folding slope s3 is arranged on the top of the first side plate 2-1, and the third folding slope s3 is inclined downward from the top of the first side plate 2-1 and faces the inner side of the forming die 2. The third folding slope s2 is used to fold the first flange of the packaging box. The inclination angle of the third folding slope s3 can be 30-70°. A third folding slope s3 is also arranged on the top of the second side plate 2-2, and the third folding slope s3 on the first side plate 2-1 and the third folding slope s3 on the second side plate 2-2 are opposite.

[0079] In order to realize the folding of the flanges of the paper cover in sequence, the heights of the folding slopes on the forming die 2 are different. The height of the folding slope of the present application refers to the vertical distance between the folding slope and the bottom plate 2-5. In the present embodiment, the height of the first folding slope s1 is the highest, the height of the second folding slope s2 is the lowest, and the height of the third folding slope s3 is between the first folding slope s1 and the second folding slope s2, that is, the paper cover 10 will pass through the first folding slope s1, the third folding slope s3 and the second folding slope s2 in sequence from top to bottom during the downward pressing process.

[0080] From Figure 1 It can be seen that the packaging box is a cuboid, that is, the length of the first flange is greater than the length of the second flange. When the length of the flange is relatively long, during the pressing process, the flange is prone to being squeezed in the middle when being folded inward through the folding slope, thereby causing the deformation of the flange and making the flange uneven, which affects the folding effect.

[0081] In order to avoid the deformation of the flange during the folding process when the length of the flange is relatively long, preferably, a fourth folding slope s4 is arranged on the first side plate 2-1 of the present embodiment, and the fourth folding slope s4 is located below the third folding slope s3, that is, the height of the fourth folding slope s4 is lower than the height of the third folding slope s3. The first flange is folded twice by the third folding slope s3 and the fourth folding slope s4, so that the first flange is perpendicular to the bottom surface of the packaging box.

[0082] The height of the fourth folding slope s4 can be higher than the height of the second folding slope s2, or can be consistent with the height of the second folding slope s2. When the height of the fourth folding slope s4 is equal to the height of the second folding slope s2, the first and second folding edges are folded simultaneously during the paper skin 10 pressing process, and the resistance received by the paper skin 10 during the pressing process is greater. According to the principle of force interaction, the pressure received by the paper skin 10 during the pressing process is also greater, and the possibility of deformation or damage is also greater.

[0083] The inclination angle of the third folding slope s3 and the inclination angle of the fourth folding slope s4 can be equal or not equal. The inclination angle of the fourth folding slope s4 can be 30-70°. In the embodiment, the inclination angle of the fourth folding slope s4 is not equal to the inclination angle of the third folding slope s3, the inclination angle of the fourth folding slope s4 is greater than the inclination angle of the third folding slope s3, the inclination angle of the fourth folding slope s4 is 60°, and the inclination angle of the third folding slope s3 is 45°.

[0084] When the inclination angle of the folding slope is too large, the pressing stroke of the folding edge is large, the height of the forming die is relatively high, the volume is large, and the thickness of the side wall of the forming cavity is thin, which is not strong enough and is easy to be damaged. If the inclination angle of the folding slope is too small, the pressing stroke of the folding edge is small, the pressure received by the paper skin during the pressing process is large, and deformation or damage may occur. Therefore, the inclination angle of each folding slope of the present application is preferably 30-70°.

[0085] Further, in order to strengthen the folding effect of the third folding slope s3 and avoid deformation of the folding edge, a vertical transition surface s5 is further arranged between the third folding slope s3 and the fourth folding slope s4, and the vertical transition surface s5 is perpendicular to the bottom plate 2-5. The third folding slope s3 and the fourth folding slope s4 are connected by the vertical transition surface s5, and the paper skin 10 sequentially passes through the third folding slope s3, the vertical transition surface s5 and the third folding slope s3 during the pressing process, and the folding effect is strengthened by the vertical transition surface s5.

[0086] Similarly, the fourth folding slope s4 and the vertical transition surface s5 are also arranged on the second side plate 2-2, and the fourth folding slope s4 on the first side plate 2-1 and the fourth folding slope s4 on the second side plate 2-2 are opposite to each other, and the vertical transition surface s5 on the first side plate 2-1 and the vertical transition surface s5 on the second side plate 2-2 are opposite to each other.

[0087] As a preferred embodiment of the present application, the folding limiting part 1-2 is arranged on the pressing die 1, and the folding limiting part 1-2 is located at both ends of the pressing die 1 in the length direction. When the pressing die 1 is lowered into the forming die 2, the folding limiting part 1-2 at both ends of the pressing die 1 is respectively opposite to the third side plate 2-3 and the fourth side plate 2-4. The folding limiting part 1-2 is used to push against the second folding edge and the third folding edge after folding, so that the second folding edge and the third folding edge are kept in a state perpendicular to the bottom plate 2-5, and the second folding edge and the third folding edge are resisted when nailing, so as to avoid that the second folding edge and the third folding edge are not overlapped together, resulting in nailing failure.

[0088] The folding limiting part 1-2 is fixed with the pressing die 1. The vertical sectional shape of the folding limiting part 1-2 in the embodiment is a half I shape. The side opposite to the folding edge of the folding limiting part 1-2 forms a hollow groove, so that the top of the folding limiting part 1-2 can push against the folding edge, and the hollow groove can form a nail avoiding space, which does not affect nailing. Further, the folding limiting part 1-2 in the embodiment has a flange 1-2a extending downward from the top. The downward extending flange 1-2a can better resist the folding edge, without affecting nailing.

[0089] In other embodiments, the folding limiting part can also be a vertical plate fixed with the pressing die. The vertical plate is correspondingly provided with a hollow part at the nailing position, so that the vertical plate can push against the folding edge to limit the folding edge, and the hollow part on the vertical plate does not affect nailing.

[0090] In some embodiments, the bottom plate 2-5 of the forming die 2 is further processed with a waste hollow part 2-5a. Some paper scraps generated in the folding process can fall from the waste hollow part 2-5a.

[0091] In some embodiments, the forming die 2 can further integrate a nailing device, so that after the paper skin is folded into a packaging box, the nailing device directly performs nailing, and the folding and nailing process is completed at one time. Figure 3 As shown in FIG. 6, the nailing hollow part Q is arranged at the lower part of the third side plate 2-3 and the fourth side plate 2-4, and the position of the nailing hollow part Q corresponds to the nailing position. The nailing device (not shown) such as a nailing gun can be fixed with the third side plate 2-3 and the fourth side plate 2-4. The nail shot by the nailing device passes through the nailing hollow part Q and is nailed on the second folding edge and the third folding edge, so as to complete the nailing operation.

[0092] In order to avoid the interference of the pressing die 1 on nailing, the pressing die 1 is optionally provided with an avoiding gap 1b at the four corner positions, and the position of the avoiding gap 1b corresponds to the position of the nailing hollow part Q. Since the pressing die 1 is provided with the avoiding gap 1b at the four corner positions, the side of the pressing die 1 facing the third side plate 2-3 and the fourth side plate 2-4 respectively forms a protruding part outward.

[0093] The following will be described in combination with Figure 1 ,Figure 3 , Figure 7 , Figure 8 and Figure 9 ,by Figure 1 Taking the rectangular box shown as an example, the process of folding and forming a packaging box using the packaging box forming mechanism of this embodiment will be explained.

[0094] After the packaging equipment equipped with the packaging box forming mechanism of the present invention is started, the robot arm drives the pressing mold 1 to move to the material preparation area, the suction cup on the pressing mold 1 picks up the paper to be folded, and then the robot arm drives the pressing mold 1 to move above the forming mold 2 and presses the paper down into the forming mold 2.

[0095] During the pressing process of the cardboard 10 by the die 1, the cardboard 10 first contacts the first folding inclined surface s1 of the forming die 2. The first folding inclined surface s1 folds the third folding edge 103 located at both ends of the first folding edge 101 inward. The third folding edge 103 bends along the folding cutting line, completing the first folding. The state of the cardboard after the first folding is as follows: Figure 7 As shown, at this time, all four third folds 103 are folded along the first folding slope s1 and are perpendicular to the first fold 101;

[0096] The die 1 continues to press the cardboard 10 downwards. The cardboard 10 passes through the third folding slope s3, which folds the first folded edge 101 inwards. Since the third folded edge 103 is connected to the first folded edge 101, it also folds inwards along with it. In this embodiment, the forming die 2 is provided with a vertical transition surface s5 and a fourth folding slope s4. After the cardboard 10 is folded by the third folding slope s3, the folding effect is reinforced sequentially by the vertical transition surface s5 and the fourth folding slope s4. After passing through the fourth folding slope s4, the state of the cardboard is as follows: Figure 8 As shown, at this time, both the first fold 101 and the third fold 103 are perpendicular to the bottom surface 100;

[0097] The die 1 continues to press the cardboard 10 downwards. The cardboard 10 passes through the second folding slope s2, which folds the second edge 102 inwards. The second edge 102 and the first edge 101 together form the side wall of the packaging box. The third edge 103 folds inwards before the second edge 102, so that the third edge 103 is located inside the second edge 102. Figure 1 As shown, the packaging box now forms four 90° right angles;

[0098] The nailing device (not shown) nails at the four corners of the packaging box, nailing the overlapping parts of the third fold 103 and the second fold 102 together, so that the first fold 101 and the second fold 102 are connected, thus completing the forming of the packaging box.

[0099] After the packaging equipment provided with the packaging box forming mechanism of the application is started, the sensor can also detect the paper cover or the nails of the nail gun and the like to determine whether the materials are normal. For example, the photoelectric sensor can be used to detect the materials of the paper cover in the material preparation area or the nails of the nail device. When the materials are normally in place, the manipulator controls the mold to perform the material taking action. If the materials are missing, the sensor sends an alarm signal, and after the materials are replenished, the subsequent process continues.

[0100] In some embodiments, an inductive switch, such as a blocking switch, can be provided on the mold. When the mold drives the paper cover to be pressed downward, sequentially passes through each folding inclined surface, and completes the folding of all the edges, the inductive switch is triggered, and it is considered that the mold has been moved into position. The inductive switch sends a start signal to the nail device to start the nail device to perform nailing. After nailing is completed, the nail device sends a completion signal to the manipulator, the manipulator controls the mold to move away from the forming mold, and moves to the unloading area to unload the folded packaging box, and then repeats the above steps to fold the next packaging box.

[0101] In some embodiments, after the nail device completes nailing, a metal proximity switch or the like sensor can be provided to detect each nailing position on the packaging box to determine whether all the nailing positions have been nailed. If all the nailing positions have been nailed, the manipulator controls the mold to transfer the packaging box to the designated unloading area for unloading. If the metal proximity switch does not detect a nail at the position where the nail should be on the packaging box, it is considered that the packaging box is unqualified, and the manipulator controls the mold to move to the defective product area for unloading.

[0102] Embodiment 2

[0103] The difference between this embodiment and embodiment 1 is that only the third folding inclined surface is provided on the first side plate and the second side plate of the forming mold in this embodiment, and the vertical transition surface and the fourth folding inclined surface are not provided. The height of the third folding inclined surface is between the first folding inclined surface and the second folding inclined surface.

[0104] When the mold with the paper cover is pressed from top to bottom into the cavity of the forming mold, the paper cover sequentially passes through the first folding inclined surface, the third folding inclined surface and the second folding inclined surface of the forming mold. The first folding inclined surface completes the folding of the third edge, the third folding inclined surface completes the folding of the second edge connected with the third edge, and the second folding inclined surface completes the folding of the second edge adjacent to the first edge. Through three times of folding of the three folding inclined surfaces, the packaging box with an upper opening is folded out.

[0105] The forming mechanism of this embodiment is the same as the forming mechanism of embodiment 1 in other structures and step processes except that only three folding inclined surfaces are used for edge folding.

[0106] Embodiment 3

[0107] The difference between this embodiment and embodiment 2 is that the height of the second folding slope and the third folding slope of the forming die of this embodiment is equal.

[0108] When the die is pressed into the cavity of the forming die with the paper skin from top to bottom, the paper skin first passes through the first folding slope of the forming die, and the third folding edge is folded by the first folding slope, and then the second folding edge and the first folding edge are folded inward by the second folding slope and the third folding slope respectively, and the folding of the three folding edges is completed, and the upper opening packaging box is folded out.

[0109] The forming mechanism of this embodiment is the same as that of embodiment 2 in structure and step process except that the height of the second folding slope and the third folding slope is equal.

[0110] Embodiment 4

[0111] The difference between this embodiment and embodiment 1 is that the length of the first side plate and the second side plate is equal to the length of the third side plate and the fourth side plate. The second folding slope and the fifth folding slope are arranged on the first side plate and the second side plate, and the fifth folding slope is below the second folding slope.

[0112] When the die is pressed into the cavity of the forming die with the paper skin from top to bottom, the paper skin passes through the first folding slope, the third folding slope, the vertical transition surface, the fourth folding slope, the second folding slope and the fifth folding slope of the forming die in turn, the first folding slope completes the folding of the third folding edge, the third folding slope and the fourth folding slope complete the folding of the second folding edge connected with the third folding edge, and the second folding slope and the fifth folding slope complete the folding of the second folding edge, and the upper opening packaging box is folded out.

[0113] Two folding slopes are arranged on the first side plate and the second side plate, which are suitable for folding in the case that the length of the second folding edge is relatively long, and the deformation of the long folding edge during folding can be avoided through the two folding slopes.

[0114] Embodiment 5

[0115] The difference between this embodiment and embodiment 4 is that a vertical transition surface is arranged between the second folding slope and the fifth folding slope, and the folding effect is strengthened through the vertical transition surface.

[0116] Embodiment 6

[0117] The difference between this embodiment and embodiment 1 is that a vertical transition surface is arranged below the first folding slope, and the vertical transition surface is between the first folding slope and the second folding slope, and the folding effect of the first folding slope is strengthened by arranging the vertical transition surface.

[0118] The packaging forming mechanism of the present application presses the paper cover into the forming die provided with different folding slopes by a pressing die. In the process of pressing the paper cover, the paper cover sequentially passes through different folding slopes, and each folding slope can fold the corresponding folding edge. The operation process is simple, and manual operation is not required. The degree of automation is high, and the efficiency is high.

[0119] The above description of disclosed embodiments enables one of ordinary skill in the art to make or use the application. Various modifications to these embodiments will be readily apparent to those of ordinary skill in the art, and the generic principles defined herein can be applied to other embodiments without departing from the spirit or scope of the application. Therefore, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A packaging box forming mechanism characterized by comprising: The utility model relates to a paper skin folding and nailing device, including: Oppositely arranged pressing die and forming die; The forming die includes bottom plate and first side plate, third side plate, second side plate and fourth side plate which are sequentially arranged around the bottom plate and enclose the cavity of the forming die, and the pressing die can be moved into the cavity of the forming die; The first side plate is provided with third folding inclined surface which inclines downward and is directed to the inner side of the forming die, and is also provided with fourth folding inclined surface which inclines downward and is directed to the inner side of the forming die, and the fourth folding inclined surface is below the third folding inclined surface, and a vertical transition surface is arranged between the third folding inclined surface and the fourth folding inclined surface, and the vertical transition surface is perpendicular to the bottom plate; the second side plate is oppositely arranged with the first side plate and has the same structure; The both ends of the third side plate are respectively provided with extension part which extends upward from the top of the third side plate, and the extension part is provided with first folding inclined surface which inclines downward and is directed to the inner side of the forming die, and the third side plate is also provided with second folding inclined surface which inclines downward and is directed to the inner side of the forming die, and the second folding inclined surface is below the first folding inclined surface; the fourth side plate is oppositely arranged with the third side plate and has the same structure.

2. The packaging box forming mechanism according to claim 1, wherein: The third folding inclined surface is arranged to incline downward from the top of the first side plate; And / or, the first folding inclined surface is arranged to incline downward from the top of the extension part; And / or, the second folding inclined surface is arranged to incline downward from the top of the third side plate.

3. The packaging box forming mechanism according to claim 1, wherein: The height of the second folding inclined surface is lower than the height of the third folding inclined surface; Or, the height of the second folding inclined surface is consistent with the height of the third folding inclined surface.

4. The packaging box forming mechanism according to claim 1, wherein: The height of the second folding inclined surface is lower than the height of the fourth folding inclined surface; Or, the height of the second folding inclined surface is consistent with the height of the fourth folding inclined surface.

5. The packaging box forming mechanism according to claim 1, wherein: The inclination angle of the fourth folding inclined surface is 30-70 DEG.

6. The packer forming mechanism according to claim 1, wherein: The inclination angle of the first folding inclined surface is 30-70 DEG; And / or, the inclination angle of the second folding inclined surface is 30-70 DEG; And / or, the inclination angle of the third folding inclined surface is 30-70 DEG.

7. The packaging box forming mechanism according to claim 1, wherein: The pressing die is a plate body, and the both ends of the pressing die are provided with edge limiting part for abutting against the edge of paper skin, and when the pressing die is moved into the forming die, the edge limiting part is opposite to the third side plate and the fourth side plate respectively.

8. The packer forming mechanism according to claim 7, wherein: The vertical section shape of the edge limiting part is half I shape, and the side opposite to the edge of the edge limiting part forms air slot for avoiding nails.

9. The packer forming mechanism according to claim 8, wherein: The edge limiting part has flange which extends downward from the top, and the edge of paper skin abuts against the flange.

10. The packaging box forming mechanism according to claim 1, wherein: The device also includes nailing device which is arranged on the third side plate and the fourth side plate, and the third side plate and the fourth side plate are provided with nailing hollow part through which the nails shot by the nailing device pass.

11. The packer forming mechanism according to claim 10, wherein: The pressing die is provided with air clearance gap corresponding to the nailing hollow part at the four corner positions.

12. The packer forming mechanism according to claim 1, wherein: The pressing die is provided with adsorption part for adsorbing paper skin.

13. The packer forming mechanism according to claim 12, wherein: The adsorption component is a suction cup, the mold is provided with a suction cup mounting support for mounting the suction cup, the mold is provided with a through hole, and the suction cup is exposed to the bottom surface of the mold through the through hole.

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