A three-dimensional packaging box inner box automatic forming machine

Abstract

The invention relates to an automatic forming machine for an inner box of a three-dimensional packaging box, belonging to the technical field of automatic forming machine equipment, and comprising a surrounding strip pushing device for conveying surrounding strips, a mold conveying device for conveying inner box molds, a surrounding strip preforming device, a surrounding strip forming and transferring device, a bottom card conveying and gluing device for conveying bottom cards, a bottom card transferring device, an inner box forming device, an upper paper card transferring device for transferring upper paper cards, a forming and extracting device, and a corner pasting device for fixing the upper paper card. The surrounding strips, the inner box mold, the bottom card, and the upper paper card constituting the inner box of the three-dimensional packaging box are sequentially assembled and formed in the aforementioned devices through a PLC control system, which greatly saves the assembly and forming time of the inner box of the three-dimensional packaging box, improves production efficiency, effectively controls product quality through standard assembly line operations, effectively saves labor costs, and improves the competitiveness of enterprises in the market.

Description

Technical Field

[0001] The present invention relates to the technical field of automatic forming machine equipment, and in particular to an automatic forming machine for inner boxes of three-dimensional packaging boxes. Background Art

[0002] The three-dimensional packaging box includes an outer box and an inner box. The inner box and the outer box are glued and folded separately, and then glued together. The box blank of the inner box is generally divided into three parts: the surrounding strip, the bottom card and the upper paper card. The surrounding strip is used to surround the inner box mold, and then the adhesive bottom card is glued to the bottom of the inner box mold after molding and bent into shape. Finally, the upper paper card is attached to the top of the inner box mold and bent, and connected at the corners with tape to facilitate subsequent cutting and opening.

[0003] At present, most manufacturers use semi-automated production lines, which are completed through machine bending and gluing, combined with manual bonding and manual corner pasting. The production efficiency is low, the quality of the finished product cannot be guaranteed, and the company also has to bear a heavy burden of labor costs. Summary of the invention

[0004] In order to overcome the defects of the prior art, the present invention provides an automatic inner box forming machine for a three-dimensional packaging box, which bends the surrounding strips, inner box mold, bottom card and upper paper card in sequence, and finally connects and fixes the upper paper card through a corner pasting device, so that the inner box of the three-dimensional packaging box can be fully automatically formed, thereby greatly improving production efficiency and quality.

[0005] The technical solution to achieve the above purpose is:

[0006] The present invention provides an automatic inner box forming machine for a three-dimensional packaging box, comprising a rectangular inner box mold for forming, a surrounding strip arranged around the inner box mold, and a bottom card and an upper paper card forming the inner box, wherein the four corners of the bottom card have first notches, and further comprising:

[0007] A strip pushing device, the strip pushing device comprising a pushing platform for storing the strips, one end of the pushing platform is provided with a suction pressing plate that can move up and down, the suction pressing plate has a suction port facing the strips, and the suction pressing plate sucks the strips from above and then moves downward;

[0008] A mold conveying device, the mold conveying device includes a conveying platform located directly below the pushing platform and conveying the inner box mold, and a first pushing device is provided at one end of the conveying platform away from the suction pressing plate, the first pushing device pushes the inner box mold on the conveying platform toward the suction pressing plate until it reaches the position of the surrounding strip and continues to push forward into the square groove of the first mold described below;

[0009] A device for preforming the surrounding strips, the device comprising a first divider, the first divider being evenly sleeved with a plurality of first molds, the first mold being provided with a square groove for accommodating the inner box mold, and after the inner box mold pushes the surrounding strips into the square groove, three sides of the surrounding strips are automatically bent and attached to the inner box mold, through grooves are symmetrically provided on both sides of the square groove, so as to facilitate the clamping of the four sides of the inner box mold at the square groove and the through groove, respectively, and an elastic block obliquely extending into the groove is provided at the opening of the square groove, for preforming the two ends of the surrounding strips, and the ends are respectively bent at a certain angle by the elastic block, so as to facilitate the forming of the fourth side of the surrounding strips;

[0010] The strip forming and transferring device comprises a second divider, a second pushing device facing the inner box mold is fixedly provided above the second divider, and is used to push and press the two end portions of the preformed strip into shape and attach them to the fourth side of the inner box mold. The second pushing device has a second notch at the top of one end away from the second divider, which is convenient for clamping by the following first pneumatic fingers. A plurality of second molds sleeved on the second divider are evenly provided above the second pushing device. The second mold is provided with a first pneumatic finger that can move up and down and is used to clamp the four sides of the inner box mold. After the second pushing device pushes and presses the two ends of the strip into shape, it remains stationary, and the four sides of the inner box mold are clamped by the first pneumatic fingers, and the molded strip is transferred to the next station.

[0011] A bottom card conveying and gluing device, the bottom card conveying and gluing device comprises a bottom card library for storing the bottom cards and a second conveyor belt for conveying the bottom cards, the bottom card library is provided with an opening perpendicular to the second conveyor belt, a first gluing wheel group is provided between the opening and the second conveyor belt, a third pushing device is provided at one end of the bottom card library away from the first gluing wheel group, the bottom cards in the bottom card library are pushed out along the opening by the third pushing device, firstly, two sides of the bottom card are glued by the first gluing wheel group, second gluing wheel groups are provided on both sides of the second conveyor belt, and after the bottom card reaches the second conveyor belt, the other two sides of the bottom card are glued by the second gluing wheel group;

[0012] A bottom card transfer device, the bottom card transfer device comprises a third divider, the third divider is evenly sleeved with at least two third molds, the third mold is provided with a paper suction block that can move up and down facing the conveyor belt, and the bottom card coated with glue is transferred to the fourth mold through the third mold;

[0013] An inner box forming device, the inner box forming device comprises a fourth divider, the fourth divider is evenly sleeved with at least four fourth molds, respectively facing the suction block and the first pneumatic finger and directly below the swing arm and the second pneumatic finger in sequence, the fourth mold is provided with a workbench for accommodating the bottom card, the center of the workbench is provided with a square groove for accommodating the inner box mold, firstly, the glue-coated bottom card sucked by the suction block is placed on the workbench, and then the inner box mold surrounded by the surrounding strip clamped by the first pneumatic finger is placed on the bottom card, and the bottom card is pressed into the square groove, so that the four sides of the bottom card are bent and formed, and are respectively pasted on the four sides of the surrounding strip;

[0014] An upper paper card transfer device, the upper paper card transfer device comprises an upper paper card library for storing upper paper cards and a rotatable swing arm facing the upper paper card library, a suction device is provided at the top of the swing arm, and after the swing arm sucks the upper paper card, the upper paper card is rotated to the fourth mold on which the bottom card and the inner box mold are placed;

[0015] The forming and extracting device comprises a fifth divider, the fifth divider is evenly sleeved with at least two fifth molds, the fifth mold comprises a second pneumatic finger that can move up and down and is used to clamp the inner box mold around, the second pneumatic finger first presses down to bend the four sides of the upper paper card to buckle on the four sides of the formed bottom card, and then clamps the inner box mold and transfers it to the inner box channel bracket described below;

[0016] The corner pasting device includes a vertical inner box channel bracket for accommodating the forming inner box mold, and the periphery of the inner box channel bracket is provided with a corner pasting machine facing the four corners of the inner box mold. The inner box mold clamped with the upper paper card is pressed down along the inner box channel bracket by the second pneumatic finger, and the corner pasting machine attaches tape to the four corners of the inner box mold to connect and fix the bent upper paper card.

[0017] Furthermore, the pushing platform includes a plurality of parallel paper pushing shafts, and the paper pushing shafts are arranged at an angle, wherein the end close to the suction pressure plate is lower than the end away from the suction pressure plate, so as to facilitate the surrounding strip to move downward along the inclined paper pushing shafts, thereby facilitating the suction pressure plate to absorb the surrounding strip.

[0018] Furthermore, a gravity push plate is sleeved on one end of the paper pushing shaft away from the suction pressure plate, so as to increase the self-gravity of the oblique downward movement of the surrounding strip.

[0019] Furthermore, the mold conveying device also includes a first conveyor belt connected to the conveying platform, the inner box mold is located on the top of the first conveyor belt, and a displacement sensor is provided at one end of the first conveyor belt close to the conveying platform. The inner box mold is automatically conveyed by the first conveyor belt. When the inner box mold reaches the conveying platform and is sensed by the displacement sensor, the first conveyor belt stops operating.

[0020] Furthermore, the second pushing device includes a second cylinder, the top of the second cylinder is connected to a pushing block, the second notch is located at the top of the top of the pushing block, which is convenient for the clamping of the first pneumatic finger. The second cylinder drives the pushing block to push the surrounding strip forward, so that the surrounding strip is formed in the inner box mold, maintains the pushing state, and transfers it by clamping the surrounding strip around the first pneumatic finger.

[0021] Furthermore, adjustment blocks are provided at the four corners of the square groove, and a sharp corner matching the first notch is provided at one end of the adjustment block facing the groove, so that the position of the bottom card sucked by the paper suction block is limited by the adjustment block.

[0022] Furthermore, the workbench is provided with a recessed structure connected to the periphery of the groove, so as to facilitate the second pneumatic finger to clamp the inner box mold.

[0023] Furthermore, the inner box forming device also includes a box pressing device facing the fourth mold, and the fourth mold facing the box pressing device is located between the fourth mold facing the first pneumatic finger and the fourth mold facing the swing arm. The box pressing device includes a pressing plate that can move up and down. After the inner box mold is attached to the bottom card and before the upper paper card is placed, the inner box mold is pressed down for a second time by the pressing plate, so that the four sides of the bottom card are firmly adhered to the surrounding strips of the inner box mold.

[0024] Furthermore, there are two upper paper card libraries, which are symmetrically arranged on both sides of the swing arm, so that more upper paper cards can be stored. By rotating the swing arm 90 degrees, the upper paper cards in the upper paper card library are sucked in sequence, so that the swing arm rotates in the range between the two upper paper card libraries and the fourth mold.

[0025] Furthermore, a box outlet channel is connected to the bottom of the inner box channel bracket, and an end of the box outlet channel close to the inner box channel bracket is provided with a box outlet cylinder facing the box outlet channel, which is used to push the inner box of the fully formed three-dimensional packaging box out of the forming machine through the box outlet cylinder.

[0026] Beneficial effect: Compared with the prior art, the difference of the present invention lies in that the automatic forming machine for the inner box of a three-dimensional packaging box provided by the present invention comprises a strip pushing device for conveying the strip, a mold conveying device for conveying the inner box mold, a strip preforming device, a strip forming and transferring device, a bottom card conveying and gluing device for conveying the bottom card, a bottom card transferring device, an inner box forming device, an upper paper card transferring device for transferring the upper paper card, a forming and extracting device and a corner pasting device for fixing the upper paper card. Through the PLC control system, the strip, inner box mold, bottom card and upper paper card that constitute the inner box of the three-dimensional packaging box are assembled and formed in sequence in the aforementioned devices, which greatly saves the assembly and forming time of the inner box of the three-dimensional packaging box and improves production efficiency. Through standard assembly line operations, the quality of the product can be effectively controlled, and labor costs can be effectively saved, thereby improving the competitiveness of the enterprise in the market. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 This is a schematic structural diagram of an automatic inner box forming machine for a three-dimensional packaging box according to a preferred embodiment of the present application.

[0028] Figure 2 This is a schematic diagram of the disassembly of the inner box of the three-dimensional packaging box of this application.

[0029] Figure 3 It is a schematic diagram of the structure of the slat pushing device in this application.

[0030] Figure 4 It is a schematic diagram of the structure of the mold conveying device in this application.

[0031] Figure 5 It is a schematic diagram of the structure of the surrounding strip preforming device in this application.

[0032] Figure 6 It is a schematic diagram of the structure of the surrounding strip forming and transferring device in this application.

[0033] Figure 7 This is a schematic diagram of the structure of the bottom card conveying and gluing device in this application.

[0034] Figure 8 It is a structural schematic diagram of the bottom card transfer device in this application.

[0035] Fig. 9 It is a schematic diagram of the structure of the inner box forming device in this application.

[0036] Fig.10 It is a structural schematic diagram of the upper paper card transfer device in this application.

[0037] Fig.11 It is a schematic diagram of the structure of the molding and extraction device in this application.

[0038] Fig.12 This is a schematic diagram of the structure of the corner pasting device in this application.

[0039] Among them, 101-inner box mold, 102-surrounding strip, 103-bottom card, 104-upper paper card, 1-surrounding strip pushing device, 11-pushing platform, 12-paper pushing shaft, 13-gravity pushing plate, 14-suction pressing plate, 2-mold conveying device, 21-conveyor platform, 22-first pushing device, 23-first conveyor belt, 3-surrounding strip preforming device, 31-first divider, 32-first mold, 33-square groove, 34-elastic block, 4-surrounding strip forming and transferring device, 41-second divider, 42-second pushing device, 43-second mold, 44-first pneumatic finger, 45-second notch, 5-bottom card conveying and gluing device, 51-bottom card library, 52-second conveyor belt, 53 -export, 54-third pushing device, 55-first gluing wheel group, 56-second gluing wheel group, 6-bottom card transfer device, 61-third divider, 62-third mold, 63-paper suction block, 7-inner box forming device, 71-fourth divider, 72-fourth mold, 73-first station, 74-workbench, 75-groove, 76-adjusting block, 77-box pressing device, 78-pressing plate, 8-upper paper card transfer device, 81-upper paper card library, 82-swing arm, 83-suction device, 9-forming and extracting device, 91-fifth divider, 92-fifth mold, 93-second pneumatic finger, 10-corner pasting device, 100-inner box channel bracket, 110-corner pasting machine, 120-box outlet channel. DETAILED DESCRIPTION

[0040] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0041] See also Figure 1 and Figure 2 As shown, the present invention provides an automatic inner box forming machine for a three-dimensional packaging box, comprising a rectangular inner box mold 101 for forming, a surrounding strip 102 wrapped around the inner box mold 101, and a bottom card 103 and an upper paper card 104 constituting the inner box, wherein the four corners of the bottom card 103 all have a first notch 105, and also comprising a surrounding strip pushing device 1 for forming the above-mentioned surrounding strip 102, the bottom card 103 and the upper paper card 104, a mold conveying device 2, a surrounding strip preforming device 3, a surrounding strip forming and transferring device 4, a bottom card conveying and gluing device 5, a bottom card transferring device 6, an inner box forming device 7, an upper paper card transferring device 8, a forming and extracting device 9 and a corner pasting device 10.

[0042] In the above molding process, first, refer to Figure 3 and Figure 4As shown, the strip pushing device 1 includes a pushing platform 11 for storing the strip 102. Preferably, the pushing platform 11 is provided with four inclined paper pushing shafts 12. The strip 102 is placed upright on the paper pushing shafts 12 and moves downward according to the inclined direction. More preferably, the middle two of the four paper pushing shafts 12 are sleeved with gravity pushing plates 13 at the left ends to increase the self-gravity of the strip 102 so that the strip 102 slides downward faster. The right end of the pushing platform 11 is provided with a suction pressing plate 14. The suction pressing plate 14 is provided with suction ports facing the two ends of the strip 102 for sucking and fixing the strip 102, and then the up and down movement is controlled by the cylinder to transport the strip 102, and the middle part of the strip 102 is used to pass through the inner box mold 10 1; a mold conveying device 2 is provided directly below the pushing platform 11, including a conveying platform 21 for conveying the inner box mold 101, and a first pushing device 22 is provided at the left end of the conveying platform 21. After the suction pressing plate 14 transports the surrounding strip 102 to the bottom, the first pushing device 22 pushes the inner box mold 101 to move to the right, so that the inner box mold 101 moves to the next station in the middle of the surrounding strip 102. Preferably, a first conveyor belt 23 is connected to one side of the conveying platform 21, and the first conveyor belt 23 continuously conveys the inner box mold 101. When the inner box mold 101 reaches a suitable position of the pushing platform 11, the displacement sensor sends a signal to the PLC control system to control the first conveyor belt 23 to stop running;

[0043] Then, see Figure 5 As shown, the surrounding strip preforming device 3 includes a first divider 31, and the first divider 31 is evenly sleeved with four first molds 32. Each first mold 32 is provided with a square groove 33 for accommodating the inner box mold 101. The first pushing device pushes the inner box mold 101 and the surrounding strip 102 into the square groove 33. The surrounding strip 102 is bent in the square groove 33. The two ends of the surrounding strip 102 are also bent at a certain angle under the action of the elastic block 34 near the entrance of the square groove 33, so that three sides of the surrounding strip 102 are completely bent and attached to the inner box mold 101, and the two ends of the surrounding strip 102 are aligned at the fourth side of the inner box mold 101 to form the fourth side of the surrounding strip 102.

[0044] Then, see Figure 6As shown, the surrounding strip forming and transferring device 4 includes a second divider 41, and a second pushing device 42 is fixedly provided above the second divider 41 and facing the inner box mold 101. When the first mold carries the inner box mold 101 and the preformed surrounding strip 102 to a position close to the second divider 41, the second pushing device 42 pushes forward to make the fourth side of the surrounding strip 102 previously aligned and pre-bent at a certain angle fit on the inner box mold 101 and maintain the pushing state. A second mold 43 is provided above the second pushing device 42 to rotate with the second divider 41. The second mold 43 clamps the inner box mold 101 at the square groove, the through groove and the second notch 45 of the second pushing device 42 through the first pneumatic finger 44. At this time, the four sides of the surrounding strip 102 are respectively fitted around the inner box mold 101, and the second mold 43 continues to rotate, and the second pushing device 42 returns to its original position.

[0045] Also, see Figure 7 As shown, the bottom card conveying and gluing device 5 comprises a bottom card storehouse 51 and a second conveyor belt 52, wherein an outlet 53 of the bottom card storehouse 51 is perpendicular to the second conveyor belt 52, and a third pushing device 54 at one end of the bottom card storehouse 51 pushes the bottom card 103 along the outlet 53, passes through a first gluing wheel group 55 in the middle to gluing the left and right sides of the bottom card 103, and after reaching the second conveyor belt 52, the second conveyor belt 52 moves to the right, passes through a second gluing wheel group 56 in the middle to gluing the front and back sides of the bottom card 103, and now all four sides of the bottom card 103 have been gluing;

[0046] Then, see Figure 8 As shown, the bottom card transfer device 6 includes a third divider 61, and the third divider 61 is evenly sleeved with four third molds 62. The lower end of the third mold 62 is provided with a paper suction block 63 for sucking the bottom card 103. When the sides of the bottom card 103 are all coated with glue, the paper suction block 63 sucks the glued bottom card 103 and transfers it to the fourth mold of the inner box forming device;

[0047] See also Fig. 9As shown, the inner box forming device 7 includes a fourth divider 71, and the fourth divider 71 is evenly sleeved with eight fourth molds 72. The fourth mold 72 is placed on the paper suction block and the glue-coated bottom card 103 is the first station 73, and the second, third, fourth, and eighth stations are sequentially called clockwise. The fourth mold 72 is provided with a workbench 74 for accommodating the bottom card 103, and a groove 75 for accommodating the inner box mold 101 is provided in the middle of the workbench 74. Preferably, the four corners of the groove 75 are provided with adjustment blocks 76, and the top of the adjustment block 76 is provided with a The first notch 105 of the card 103 matches the sharp corner. After the paper suction block places the bottom card 103 on the workbench 74 of the first station 73, the fourth divider 71 rotates. When it reaches the third station, the first pneumatic finger of the second mold places the clamped inner box mold 101 on the bottom card 103 of the fourth mold 72 and presses it down into the groove 75. Through the action of the groove 75, the four side edges of the bottom card 103 are bonded to the surrounding strips 102. More preferably, a concave structure is provided around the groove 75 to facilitate the clamping of the second pneumatic finger described below.

[0048] Preferably, in order to prevent the side edges of the bottom card from being loosely adhered to the surrounding strip when the first pneumatic finger presses the bottom card into the groove through the clamped inner box mold, a box pressing device 77 is further provided at the fourth station. The box pressing device 77 is provided with a pressing plate 78 facing the fourth mold 72. The pressing plate 78 is driven downward by the cylinder to completely press the inner box mold 101 into the groove 75, so that the four side edges of the bottom card 103 are firmly adhered to the surrounding strip of the inner box mold 101.

[0049] Then, see Fig.10 As shown, the upper paper card transfer device 8 includes an upper paper card library 81 for storing the upper paper card 104 and a swing arm 82 for sucking and transferring the upper paper card 104. The bottom end of the swing arm 82 is provided with a suction device 83 facing the fourth mold on the fifth station. Preferably, there are two upper paper card libraries 81, which are symmetrically arranged on both sides of the swing arm 83. By rotating the swing arm 83 by 90 degrees, the upper paper cards 104 in the two upper paper card libraries 81 are sucked in turn, which can effectively increase the storage capacity of the upper paper cards 104 and save the time for replenishing the upper paper cards 104. After the suction device 83 sucks the upper paper card 104, it places the upper paper card 104 on the top of the inner box mold pasted with the bottom card, that is, on the fourth mold of the fifth station, and then continues to rotate;

[0050] Then, see Fig.11 As shown, the forming and extracting device 9 includes a fifth divider 91, four fifth molds 92 are evenly sleeved on the fifth divider 91, and the fifth mold 92 is provided with a second pneumatic finger 93 for bending the upper paper card 104 and clamping the inner box mold 101. When the fourth mold rotates to the sixth station, the second pneumatic finger 93 presses down on the four sides of the upper paper card 104 to bend the side of the upper paper card 104 into shape, and then clamps it, and then transfers it to the next process;

[0051] Finally, see Fig.12 As shown, the corner pasting device 10 includes a vertical inner box channel support 100, and four corner pasting machines 110 are arranged around the inner box channel support 100. Each corner pasting machine 110 is facing each corner of the inner box mold 101. When the second pneumatic finger clamps the inner box mold 101 that has been wrapped with the surrounding strip, the bottom card and the upper paper card and moves downward along the inner box channel support 100, the corner pasting machine 110 sticks tape to each corner to fix the four corners of the upper paper card. At this point, the inner box of the three-dimensional packaging box has been completely formed from the surrounding strip and the inner box mold to the pasting of the bottom card, and finally to the placement and adhesion of the upper paper card.

[0052] Preferably, a box outlet channel 120 can also be set below the inner box channel bracket. The box outlet channel 120 is provided with a box outlet cylinder at one end close to the inner box channel bracket 100. When the upper paper card of the inner box mold 101 passes through the corner pasting machine 110 and then falls down, the finished product is pushed out along the box outlet channel 120 by the box outlet cylinder, which is convenient for subsequent work.

[0053] It should be noted that the terms "first, second, third, fourth and fifth" in the present invention are only used for descriptive purposes and do not represent any order. They cannot be understood as indicating or implying relative importance. These terms can be interpreted as names.

[0054] The above specific implementation methods are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An automatic forming machine for inner boxes of three-dimensional packaging boxes, comprising a rectangular inner box mold for forming, a surrounding strip arranged around the inner box mold, and a bottom card and an upper paper card forming the inner box, wherein the four corners of the bottom card have first notches, characterized in that: Also includes: A strip pushing device, the strip pushing device comprising a pushing platform for storing the strips, one end of the pushing platform being provided with a suction pressing plate that can move up and down, the suction pressing plate having air suction ports facing both ends of the strips; A mold conveying device, the mold conveying device includes a conveying platform located directly below the pushing platform and conveying the inner box mold, and a first pushing device is provided at one end of the conveying platform away from the suction pressing plate; A strip preforming device, the strip preforming device comprising a first divider, the first divider being evenly sleeved with a plurality of first molds, the first mold being provided with a square groove for accommodating the inner box mold, through grooves being symmetrically provided on both sides of the square groove, and an elastic block extending obliquely into the groove being provided at the opening of the square groove; The surrounding strip forming and transferring device comprises a second divider, a second pushing device facing the inner box mold is fixedly arranged above the second divider, a second notch is arranged at the top of the second pushing device away from the second divider, a plurality of second molds sleeved on the second divider are evenly arranged above the second pushing device, and the second mold is provided with a first pneumatic finger that can move up and down and is used to clamp the inner box mold around; A bottom card conveying and gluing device, the bottom card conveying and gluing device comprises a bottom card warehouse for storing the bottom cards and a second conveyor belt for conveying the bottom cards, the bottom card warehouse is provided with an opening perpendicular to the second conveyor belt, a first gluing wheel group is provided between the opening and the second conveyor belt, a third pushing device is provided at one end of the bottom card warehouse away from the first gluing wheel group, and second gluing wheel groups are provided on both sides of the second conveyor belt; A bottom card transfer device, the bottom card transfer device comprising a third divider, the third divider being evenly sleeved with at least two third molds, the third mold being provided with a paper suction block facing the conveyor belt and being movable up and down; An inner box forming device, the inner box forming device comprises a fourth divider, the fourth divider is evenly sleeved with at least four fourth molds, which are respectively and sequentially directly opposite to the paper suction block and the first pneumatic finger and directly below the swing arm and the second pneumatic finger, the fourth mold is provided with a workbench for accommodating the bottom card, and a square groove for accommodating the inner box mold is provided in the center of the workbench; An upper paper card transfer device, the upper paper card transfer device comprising an upper paper card library for storing upper paper cards and a rotatable swing arm facing the upper paper card library, a suction device being provided at the top of the swing arm; A forming and extracting device, the forming and extracting device comprising a fifth divider, the fifth divider being evenly sleeved with at least two fifth molds, the fifth mold comprising a second pneumatic finger that can move up and down and is used to clamp the inner box mold around; A corner pasting device, the corner pasting device comprises a vertical inner box channel support for accommodating the inner box mold, and the periphery of the inner box channel support is provided with corner pasting machines facing the four corners of the inner box mold; The pushing platform comprises a plurality of parallel paper pushing shafts, and the paper pushing shafts are arranged obliquely, wherein one end close to the suction platen is lower than the other end away from the suction platen; The mold conveying device also includes a first conveyor belt connected to the conveying platform, the inner box mold is located on the top of the first conveyor belt, and a displacement sensor is provided at one end of the first conveyor belt close to the conveying platform.

2. The three-dimensional packaging box inner box automatic forming machine according to claim 1, characterized in that: One end of the paper pushing shaft away from the suction pressing plate is sleeved with a gravity pushing plate.

3. The three-dimensional packaging box inner box automatic forming machine according to claim 1, characterized in that: The second pushing device comprises a second cylinder, the top end of the second cylinder is connected with a pushing block, and the second notch is located at the top of the top end of the pushing block.

4. The three-dimensional packaging box inner box automatic forming machine according to claim 1, characterized in that: Adjustment blocks are arranged at the four corners of the square groove, and a sharp corner matching the first notch is arranged at one end of the adjustment block facing the groove.

5. The three-dimensional packaging box inner box automatic forming machine according to claim 1, characterized in that: The workbench is provided with a concave structure connected to the periphery of the groove.

6. The three-dimensional packaging box inner box automatic forming machine according to claim 1, characterized in that: The inner box forming device also includes a box pressing device facing the fourth mold, the fourth mold facing the box pressing device is located between the fourth mold facing the first pneumatic finger and the fourth mold facing the swing arm, and the box pressing device includes a pressing plate that can move up and down.

7. The three-dimensional packaging box inner box automatic forming machine according to claim 1, characterized in that: There are two upper paper card libraries, which are symmetrically arranged on both sides of the swing arm.

8. The three-dimensional packaging box inner box automatic forming machine according to claim 1, characterized in that: The bottom of the inner box channel support is connected with a box outlet channel, and one end of the box outlet channel close to the inner box channel support is provided with a box outlet cylinder facing the box outlet channel.

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