Express packaging box and processing method thereof

Abstract

The invention relates to the technical field of express packaging box processing, in particular to an express packaging box and a processing method thereof.The method comprises the following steps that 1, appropriate production materials are selected, and the shape and appearance of the express box are designed according to production requirements; step 2, carrying out preliminary slitting; step 3, printing patterns and characters; step 4, indentation is carried out while trimming is carried out; 5, the express packaging box is processed through gluing and folding, through the arrangement of the trimming mechanism, in the production process of the express packaging box, when a paperboard is trimmed, an air cylinder is used for pushing a trimming knife to move, the paperboard needing to be trimmed is pressed and fixed, the phenomenon that the paperboard displaces during trimming is avoided, and in addition, the production efficiency is improved. And when the paperboard is fixed, through the indentation strips and the convex blocks arranged at the bottom of the pressing plate, the paperboard can be subjected to indentation while being trimmed, and the production efficiency of express packaging boxes can be improved.

Description

Technical Field

[0001] The present invention relates to the technical field of express packaging box processing, and in particular to an express packaging box and a processing method thereof. Background Art

[0002] With the development of the Internet economy and the prevalence of online shopping, the use of express packaging boxes has gradually increased. Express packaging boxes are used for the packaging of express products. Express packaging boxes are usually made of corrugated paper, kraft paper and other materials. These materials have good cushioning properties and compressive strength, and can effectively protect the items in the package. In addition, express packaging boxes come in a variety of types and specifications to meet the packaging needs of different items and scenarios.

[0003] In the process of corrugated cardboard to packaging box forming, express manufacturers usually design the appropriate shape of the express packaging box according to customer needs, and print the required patterns and texts on the express packaging box according to customer needs, and then process the required molded cardboard for splicing the corresponding box body through processes such as trimming, creasing and gluing, which are then assembled and packaged by the commodity merchants themselves.

[0004] However, in the current processing of express packaging boxes, in order to increase the production speed of express packaging boxes, most of them use assembly line operations. In order to ensure the smoothness of the assembly line, the express packaging boxes often lack the fixation of the cardboard during trimming, which causes the cardboard to easily move during trimming, affecting the accuracy of trimming. In addition, the trimming and creasing of express packaging boxes are mostly completed in two processes. During the transmission of the cardboard between processes, it is also easy to cause the position of the cardboard to move, affecting the accuracy of the indentation position. For this reason, we propose an express packaging box and a processing method thereof. Summary of the invention

[0005] In view of the above-mentioned shortcomings of the prior art, the present invention provides an express packaging box and a processing method thereof, which can effectively solve the problems raised in the background technology.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solutions:

[0007] The present invention provides a method for processing an express packaging box, comprising the following steps:

[0008] Step 1: Select appropriate production materials according to the use requirements of the express box, and design the shape and appearance of the express box according to production requirements;

[0009] Step 2: Perform preliminary cutting according to the designed appearance of the express box to form a preliminary shape of the express box;

[0010] Step 3: Print patterns and texts according to the appearance of the designed express box;

[0011] Step 4: convey the printed cardboard to the trimming device, and perform creasing while trimming;

[0012] Step 5: After trimming and creasing, the cardboard is coated with glue and bonded when folded to complete the processing of the express packaging box;

[0013] The method also uses a packaging box processing device, which includes:

[0014] A base, the top of which is provided with a trimming mechanism for trimming and creasing the express packaging box, a material guide assembly, a waste discharge assembly and a limit assembly are provided on the base, and two symmetrically distributed inlet and outlet conveyor belts are provided on the outside of the base;

[0015] The trimming mechanism includes a pressing plate, which is arranged on the top of the base, a spring is fixedly connected to the top of the pressing plate, and the other end of the spring is fixedly connected to a fixing plate, a cylinder is arranged on the top of the fixing plate to provide power for the movement of the pressing plate, a trimming knife with the same appearance as the unfolded express packaging box is fixedly connected to the bottom of the fixing plate, an indentation strip that matches the fold of the express packaging box is arranged at the bottom of the pressing plate, two groups of symmetrically distributed protrusions are arranged at the bottom of the pressing plate, and a through knife groove is opened on the top of the pressing plate;

[0016] A limit assembly is arranged inside the base, the limit assembly includes a cavity, the cavity is opened inside the base, an air hole connected to the inside of the cavity is opened on the top of the base, a piston rod 2 is fixedly connected to the top of the pressure plate, a piston 2 is fixedly connected to the top of the piston rod 2, a piston cylinder 2 is arranged on the outside of the piston 2, and an air pipe 2 connected to the inside of the piston cylinder 2 is arranged on the outside of the piston cylinder 2.

[0017] Furthermore, a mounting plate is fixedly connected to the outer side of the cylinder, and four brackets distributed in a rectangular shape are fixedly connected to the outer side of the mounting plate, and the four brackets are all fixedly connected to the outer side of the base.

[0018] Furthermore, a vertical rod is fixedly connected to the top of the pressure plate, a top end of the vertical rod passes through the fixed plate and is slidably connected to the fixed plate, and a limiting ring is fixedly connected to the outer side of the vertical rod.

[0019] Furthermore, a discharge trough is provided on the top of the base, and the other side of the discharge trough is connected to the inside of the waste discharge assembly for discharging waste after trimming. Four supporting legs distributed in a rectangular shape are fixedly connected to the bottom of the base.

[0020] Furthermore, the waste discharge assembly includes a connecting groove, which is opened on the outside of the base, and the inside of the connecting groove is connected to the bottom of the discharge trough, and a waste discharge conveyor belt is arranged at the bottom of the base.

[0021] Furthermore, two symmetrically distributed material guide plates are fixedly connected to the bottom of the base, and four rectangularly distributed connecting blocks are fixedly connected to the outer side of the waste discharge conveyor belt.

[0022] Furthermore, the material guide assembly includes a fixed rod, which is fixedly connected to the outside of the base, and the other end of the fixed rod is fixedly connected to a rectangular cylinder, a rectangular piston is arranged on the inside of the rectangular cylinder, a piston cylinder 1 is fixedly connected to the mounting plate, a piston 1 is arranged on the inside of the piston cylinder 1, a piston rod 1 is fixedly connected to the bottom of the piston 1, and an air pipe 1 connected to the top of the piston cylinder 1 is fixedly connected to the inside of the piston cylinder 1.

[0023] Furthermore, the other end of the air pipe 1 passes through the top of the rectangular tube and is connected to the inside of the rectangular tube, and the piston rod 1 is fixedly connected to the top of the fixed plate.

[0024] Furthermore, a wheel frame is fixedly connected to the bottom of the rectangular piston, a driving motor is fixedly connected to the outer side of the wheel frame, and the driving motor is fixedly connected to a material guide wheel via an output shaft.

[0025] A courier packaging box is an courier packaging box processed by the above method, comprising a bottom plate, side plates and a panel symmetrically distributed in pairs are arranged on the outer side of the bottom plate, a top plate is arranged on the side of the panel away from the bottom plate, two symmetrically distributed adhesive blocks are fixedly connected to the outer side of the side plate, a downwardly concave pressing groove 1 is arranged in the middle of the adhesive block, and downwardly concave pressing groove 2 is arranged on both sides of the panel, and creases are arranged between the bottom plate, the side plates, the panel, the adhesive blocks and the top plate.

[0026] Compared with the known prior art, the technical solution provided by the present invention has the following beneficial effects:

[0027] 1. The present invention provides a trimming mechanism. During the production of express packaging boxes, when trimming the cardboard, a cylinder is used to push the trimming knife to press and fix the cardboard, thereby avoiding displacement of the cardboard during trimming. In addition, while fixing the cardboard, the indentation strips and protrusions provided at the bottom of the pressing plate can be used to indent the cardboard while trimming it, thereby simplifying the production process of the express packaging boxes and helping to improve the production efficiency of the express packaging boxes.

[0028] 2. The present invention sets a limit assembly. Before the trimming knife cuts the cardboard, the downward movement of the pressing plate can drive the second piston to move in the second piston cylinder. Under the action of the second air pipe, the cavity is in a negative pressure state. The cardboard to be trimmed is adsorbed on the base through the air holes to prevent the cardboard from moving when the pressing plate moves, thereby improving the accuracy of cardboard trimming.

[0029] 3. The present invention provides a waste discharge component. When the trimming mechanism trims the cardboard, the debris and waste generated by the trimming enter the waste discharge component through the discharge chute and are discharged through the waste discharge component, thereby preventing excessive residue in the equipment and affecting the subsequent trimming of the cardboard, thereby further improving the accuracy of the trimming of the express packaging box.

[0030] 4. Through the setting of the material guide component, the present invention automatically retracts the material guide wheel when the pressure plate moves downward to fix the cardboard, so as to avoid displacement of the cardboard caused by the material guide wheel. After the trimming is completed, when the fixed plate moves upward, the material guide wheel is pushed to move downward to convey the trimmed cardboard and push the cardboard to be trimmed in at the same time, so that the express packaging box processing has good continuity, which helps to improve the production efficiency of the express packaging box. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the prior art descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention, and for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0032] Figure 1 This is a schematic diagram of the overall structure of the express packaging box of the present invention;

[0033] Figure 2 It is a partial structural schematic diagram of the packaging box processing device of the present invention;

[0034] Figure 3 It is a schematic diagram of the side structure of the packaging box processing device of the present invention;

[0035] Figure 4 It is a schematic diagram of the positions of the base and the pressing plate of the present invention;

[0036] Figure 5 It is a schematic diagram of the top structure of the base of the present invention;

[0037] Figure 6 It is a schematic diagram of a partial cross-sectional structure of the base of the present invention;

[0038] Figure 7 It is a partial structural schematic diagram of the trimming mechanism of the present invention;

[0039] Figure 8 It is a schematic diagram of the connection between the fixing plate and the pressing plate of the present invention;

[0040] Fig. 9 It is a schematic diagram of a partial explosion structure of the fixing plate and the pressing plate of the present invention;

[0041] Fig.10It is a schematic diagram of the bottom structure of the pressing plate of the present invention;

[0042] Fig.11 It is a schematic diagram of a partial cross-sectional structure of a material guide assembly of the present invention;

[0043] Fig.12 It is a schematic diagram of the partial explosion structure of the limiting component of the present invention.

[0044] The numbers in the figure represent:

[0045] 1. Bottom plate; 11. Side plate; 111. Adhesive block; 112. Pressing groove 1; 12. Panel; 121. Top plate; 122. Pressing groove 2;

[0046] 2. Base; 21. Support legs;

[0047] 3. Trimming mechanism; 31. Mounting plate; 32. Bracket;

[0048] 33. Material guide assembly; 331. Driving motor; 332. Rectangular cylinder; 333. Piston cylinder 1; 334. Air pipe 1; 335. Fixed rod; 336. Material guide wheel; 337. Wheel frame; 338. Piston 1; 339. Piston rod 1; 3310. Rectangular piston;

[0049] 34. Waste discharge assembly; 341. Connecting block; 342. Waste discharge conveyor belt; 343. Guide plate; 344. Connecting groove;

[0050] 35, limit assembly; 351, piston cylinder 2; 352, air hole; 353, cavity; 354, air pipe 2; 355, piston 2; 356, piston rod 2;

[0051] 36, cylinder; 37, indentation strip; 38, vertical rod; 39, discharge chute; 310, pressing plate; 311, limiting ring; 312, trimming knife; 313, spring; 314, fixing plate; 315, knife groove; 316, bump;

[0052] 4. Inlet and outlet conveyor belts. DETAILED DESCRIPTION

[0053] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0054] The present invention will be further described below in conjunction with the embodiments.

[0055] Embodiment 1:

[0056] Reference Figure 1-10 , which is the first embodiment of the present invention, discloses a method for processing an express packaging box, comprising the following steps:

[0057] Step 1: Select appropriate production materials according to the use requirements of the express box, and design the shape and appearance of the express box according to production requirements;

[0058] Step 2: Perform preliminary cutting according to the designed appearance of the express box to form a preliminary shape of the express box;

[0059] Step 3: Print patterns and texts according to the appearance of the designed express box;

[0060] Step 4, conveying the printed paperboard to the trimming device through the feeding and discharging conveyor belt 4, performing indentation while trimming, and indenting the paperboard with indentation groove 112 and indentation groove 2 122 during the indentation process;

[0061] Step 5: After trimming and creasing, the cardboard is coated with glue, and when folded, the protrusion at the bottom of the first pressing groove 112 enters the second pressing groove 122 for bonding, thereby completing the processing of the express packaging box;

[0062] A courier packaging box is processed by the above-mentioned courier packaging box processing method, the courier packaging box comprises a bottom plate 1, side plates 11 and a panel 12 symmetrically distributed in pairs are arranged on the outer side of the bottom plate 1, a top plate 121 is arranged on the side of the panel 12 away from the bottom plate 1, two symmetrically distributed adhesive blocks 111 are fixedly connected to the outer side of the side plate 11, a downwardly concave pressing groove 1 12 is arranged in the middle of the adhesive block 111, and downwardly concave pressing groove 2 122 is arranged on both sides of the panel 12, and creases are arranged between the bottom plate 1, the side plates 11, the panel 12, the adhesive blocks 111 and the top plate 121.

[0063] The method also uses a packaging box processing device, which includes:

[0064] A base 2, a trimming mechanism 3 is provided on the top of the base 2 for trimming and creasing the express packaging box, a material guide component 33, a waste discharge component 34 and a limit component 35 are provided on the base 2, and two symmetrically distributed inlet and outlet conveyor belts 4 are provided on the outside of the base 2;

[0065] The inlet and outlet conveyor belt 4 is used to convey the printed cardboard to the trimming device and to output the trimmed cardboard from the base 2 to the next process.

[0066] Four supporting legs 21 distributed in a rectangular shape are fixedly connected to the bottom of the base 2. The supporting legs 21 support the base 2 from the bottom to ensure the stability of the base 2 and the trimming mechanism 3 above it during operation.

[0067] The trimming mechanism 3 includes a pressing plate 310, which is arranged on the top of the base 2. A spring 313 is fixedly connected to the top of the pressing plate 310, and the other end of the spring 313 is fixedly connected to a fixing plate 314. A cylinder 36 for providing power for the movement of the pressing plate 310 is arranged on the top of the fixing plate 314. A trimming knife 312 with the same appearance as the unfolded express packaging box is fixedly connected to the bottom of the fixing plate 314. An indentation strip 37 that matches the fold of the express packaging box is arranged at the bottom of the pressing plate 310. Two groups of symmetrically distributed protrusions 316 are arranged at the bottom of the pressing plate 310, and a through knife groove 315 is opened at the top of the pressing plate 310.

[0068] The telescopic end of the cylinder 36 is fixedly connected to the top of the fixed plate 314. When the cylinder 36 is extended, the fixed plate 314 can be pushed to move downward, and the trimming knife 312 at the bottom of the fixed plate 314 can be used to cut the excess edges on the cardboard to achieve the purpose of trimming. In addition, when the fixed plate 314 moves downward, the spring 313 can push the pressing plate 310 to move downward, and fix the cardboard on the top of the base 2, so that the cardboard will not be displaced during trimming, thereby ensuring the accuracy of trimming. Finally, while the pressing plate 310 fixes the cardboard, the indentation strip 37 set at the bottom of the pressing plate 310 can be used to indent the joints of each surface of the express packaging box, so as to facilitate the subsequent assembly of the express packaging box.

[0069] A forming groove corresponding to the protrusion 316 is provided on the top of the base 2 so that when the protrusion 316 indents the paperboard, the other side can protrude downward and enter the forming groove.

[0070] Under the action of two groups of symmetrically arranged protrusions 316 at the bottom of the pressing plate 310, when the pressing plate 310 fixes the cardboard, pressing groove 112 and pressing groove 2 122 can be pressed out at different positions on the cardboard, and when the express packaging box is assembled, the protrusion on the back of pressing groove 112 can enter into pressing groove 2 122 to form a snap-fit ​​structure, which is then combined with glue to improve the connection strength at the connection between two adjacent surfaces of the express packaging box.

[0071] Specifically, a mounting plate 31 is fixedly connected to the outside of the cylinder 36, and four rectangularly distributed brackets 32 are fixedly connected to the outside of the mounting plate 31. The four brackets 32 are all fixedly connected to the outside of the base 2. A vertical rod 38 is fixedly connected to the top of the pressure plate 310. The top of the vertical rod 38 passes through the fixed plate 314 and is slidably connected to the fixed plate 314. A limiting ring 311 is fixedly connected to the outside of the vertical rod 38.

[0072] The mounting plate 31 can facilitate the installation and fixation of components such as the cylinder 36. The mounting plate 31 can be connected to the base 2 under the action of the bracket 32. The moving trajectory of the pressing plate 310 is limited under the action of the vertical rod 38 to ensure that it can only move in the up and down directions. The moving range of the pressing plate 310 can be limited under the action of the limiting ring 311. When the fixing plate 314 moves upward, the pressing plate 310 is pulled upward to reset it, which is convenient for the next use of cardboard fixing.

[0073] Embodiment 2:

[0074] Reference Figure 1-11 , which is the second embodiment of the present invention, and this embodiment is different from the first embodiment in that:

[0075] The limit assembly 35 is arranged inside the base 2. The limit assembly 35 includes a cavity 353. The cavity 353 is opened inside the base 2. The top of the base 2 is opened with an air hole 352 connected to the inside of the cavity 353. The top of the pressure plate 310 is fixedly connected to a piston rod 356. The top of the piston rod 355 is fixedly connected to a piston 355. The outside of the piston 355 is provided with a piston cylinder 351. The outside of the piston cylinder 351 is provided with an air pipe 354 connected to the inside of the piston cylinder 351.

[0076] When the pressing plate 310 moves downward to fix the cardboard, the gas in the cavity 353 is extracted through the action of the second piston rod 356, the second piston 355 and the second air pipe 354, so that the cavity 353 is in a negative pressure state, and the cardboard above the base 2 is adsorbed through the air hole 352 to prevent the cardboard from moving when the pressing plate 310 does not contact the cardboard, which facilitates the fixing of the cardboard by the pressing plate 310, improves the trimming effect of the trimming knife 312, and forms a linkage with the trimming mechanism 3.

[0077] The remaining structures are the same as those of Example 1.

[0078] Embodiment 3:

[0079] Reference Figure 1-6 , which is the third embodiment of the present invention, and the difference between this embodiment and the first embodiment and the second embodiment is that:

[0080] The waste discharge assembly 34 includes a connecting groove 344, which is opened on the outside of the base 2, and the inside of the connecting groove 344 is connected to the bottom of the discharge trough 39. A waste discharge conveyor belt 342 is arranged at the bottom of the base 2, and two symmetrically distributed guide plates 343 are fixedly connected to the bottom of the base 2, and four rectangularly distributed connecting blocks 341 are fixedly connected to the outside of the waste discharge conveyor belt 342.

[0081] The bottom of the connecting groove 344 is arranged in an inclined surface, and the two guide plates 343 are arranged in an inclined state, and the two guide plates 343 are inclined in opposite directions, so as to ensure that the falling waste can accurately fall on the waste discharge conveyor belt 342.

[0082] The debris generated during cardboard trimming directly enters the connecting groove 344 through the discharge groove 39, falls on the guide plate 343 through the connecting groove 344, and finally falls on the waste conveyor belt 342 through the guide plate 343, and is transported to the collection container, which is convenient for subsequent utilization while avoiding excessive retention inside the equipment, thereby preventing the waste from affecting the trimming.

[0083] Specifically, a discharge trough 39 is provided on the top of the base 2, and the other side of the discharge trough 39 is connected to the inside of the waste discharge assembly 34 for discharging waste after trimming.

[0084] The discharge chute 39 facilitates the trimming knife 312 to cut the edge of the cardboard, and the edge waste after cutting can fall through the discharge chute 39 to avoid it remaining on the top of the base 2.

[0085] The remaining structures are the same as those of Embodiment 1 and Embodiment 2.

[0086] Embodiment 4:

[0087] Reference Figure 1-12 , which is the fourth embodiment of the present invention. This embodiment is different from the first embodiment, the second embodiment and the third embodiment in that:

[0088] The material guide assembly 33 includes a fixed rod 335, which is fixedly connected to the outer side of the base 2, and the other end of the fixed rod 335 is fixedly connected to a rectangular cylinder 332, and a rectangular piston 3310 is arranged inside the rectangular cylinder 332. A piston cylinder 333 is fixedly connected to the mounting plate 31, and a piston 338 is arranged inside the piston cylinder 333. A piston rod 339 is fixedly connected to the bottom of the piston 338, and an air pipe 334 connected to the inside of the piston cylinder 333 is fixedly connected to the top of the piston cylinder 333.

[0089] When the cylinder 36 pushes the fixed plate 314 to move and trim the edge of the cardboard, the air in the rectangular cylinder 332 can be extracted under the action of the piston rod 339, the piston 338, the piston cylinder 333 and the air pipe 334, and the rectangular piston 3310 moves upward under the action of negative pressure to retract the guide wheel 336. After the trimming is completed, when the cylinder 36 contracts, the increase in air pressure causes the rectangular piston 3310 to move downward and put down the guide wheel 336.

[0090] Specifically, the other end of the air pipe 334 passes through the top of the rectangular cylinder 332 and is connected to the inside of the rectangular cylinder 332. The piston rod 339 is fixedly connected to the top of the fixed plate 314. The bottom of the rectangular piston 3310 is fixedly connected to a wheel frame 337. The outer side of the wheel frame 337 is fixedly connected to a drive motor 331. The drive motor 331 is fixedly connected to a guide wheel 336 through an output shaft.

[0091] Under the action of the driving motor 331, the guide wheel 336 in the wheel frame 337 can be driven to rotate. The rotation of the guide wheel 336 can transfer the cardboard on the base 2. In conjunction with the two inlet and outlet conveyor belts 4, the cardboard after trimming is moved out of the base 2, and the cardboard to be trimmed is transported to the appropriate position on the top of the base 2.

[0092] The remaining structures are the same as those of Embodiments 1, 2 and 3.

[0093] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements will not cause the essence of the corresponding technical solutions to deviate from the protection scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method for processing an express packaging box, characterized in that: The following steps are involved: Step 1: Select appropriate production materials according to the use requirements of the express box, and design the shape and appearance of the express box according to production requirements; Step 2: Perform preliminary cutting according to the designed appearance of the express box to form a preliminary shape of the express box; Step 3: Print patterns and texts according to the appearance of the designed express box; Step 4: convey the printed cardboard to the trimming device, and perform creasing while trimming; Step 5: After trimming and creasing, the cardboard is coated with glue and bonded when folded to complete the processing of the express packaging box; The method also uses a packaging box processing device, which includes: A base (2), wherein a trimming mechanism (3) is arranged on the top of the base (2) for trimming and creasing the express packaging box, a material guide component (33), a waste discharge component (34) and a limit component (35) are arranged on the base (2), and two symmetrically distributed inlet and outlet conveyor belts (4) are arranged on the outside of the base (2); A trimming mechanism (3), the trimming mechanism (3) comprising a pressing plate (310), the pressing plate (310) being arranged on the top of the base (2), the pressing plate (310) being fixedly connected to the top with a spring (313), the other end of the spring (313) being fixedly connected to a fixing plate (314), the fixing plate (314) being provided with a cylinder (36) providing power for the movement of the pressing plate (310) at the top, the fixing plate (314) being fixedly connected to the bottom with a trimming knife (312) having the same appearance as the unfolded express packaging box, the pressing plate (310) being provided with an indentation strip (37) matching the fold of the express packaging box at the bottom, the pressing plate (310) being provided with two groups of symmetrically distributed protrusions (316), and the pressing plate (310) being provided with a through knife groove (315) at the top; A limit assembly (35), wherein the limit assembly (35) is arranged inside the base (2), the limit assembly (35) comprises a cavity (353), the cavity (353) is opened inside the base (2), an air hole (352) communicating with the inside of the cavity (353) is opened on the top of the base (2), a piston rod 2 (356) is fixedly connected to the top of the pressure plate (310), a piston rod 2 (355) is fixedly connected to the top of the piston rod 2 (356), a piston cylinder 2 (351) is arranged outside the piston 2 (355), and an air pipe 2 (354) communicating with the inside of the piston cylinder 2 (351) is arranged outside the piston cylinder 2 (351).

2. A method for processing an express packaging box according to claim 1, characterized in that: The outside of the cylinder (36) is fixedly connected to a mounting plate (31), and the outside of the mounting plate (31) is fixedly connected to four brackets (32) distributed in a rectangular shape, and the four brackets (32) are all fixedly connected to the outside of the base (2).

3. The method for processing an express packaging box according to claim 1, characterized in that: The top of the pressure plate (310) is fixedly connected to a vertical rod (38), the top of the vertical rod (38) passes through the fixed plate (314) and is slidably connected to the fixed plate (314), and the outer side of the vertical rod (38) is fixedly connected to a limiting ring (311).

4. The method for processing an express packaging box according to claim 1, characterized in that: A discharge trough (39) is provided on the top of the base (2), and the other side of the discharge trough (39) is connected to the inside of the waste discharge assembly (34) for discharging waste after trimming. Four supporting legs (21) distributed in a rectangular shape are fixedly connected to the bottom of the base (2).

5. The method for processing an express packaging box according to claim 1, characterized in that: The waste discharge assembly (34) comprises a connection groove (344), the connection groove (344) is opened on the outside of the base (2), and the inside of the connection groove (344) is connected to the bottom of the discharge trough (39), and a waste discharge conveyor belt (342) is arranged at the bottom of the base (2).

6. A method for processing an express packaging box according to claim 5, characterized in that: Two symmetrically distributed material guide plates (343) are fixedly connected to the bottom of the base (2), and four rectangularly distributed connection blocks (341) are fixedly connected to the outside of the waste discharge conveyor belt (342).

7. The method for processing an express packaging box according to claim 1, characterized in that: The material guide assembly (33) comprises a fixed rod (335), wherein the fixed rod (335) is fixedly connected to the outside of the base (2), the other end of the fixed rod (335) is fixedly connected to a rectangular cylinder (332), a rectangular piston (3310) is arranged inside the rectangular cylinder (332), a piston cylinder (333) is fixedly connected to the mounting plate (31), a piston cylinder (338) is arranged inside the piston cylinder (333), a piston rod (339) is fixedly connected to the bottom of the piston cylinder (338), and an air pipe (334) which is in communication with the inside of the piston cylinder (333) is fixedly connected to the top of the piston cylinder (333).

8. The method for processing an express packaging box according to claim 7, characterized in that: The other end of the air pipe 1 (334) passes through the top of the rectangular cylinder (332) and is connected to the inside of the rectangular cylinder (332). The piston rod 1 (339) is fixedly connected to the top of the fixed plate (314).

9. The method for processing an express packaging box according to claim 7, characterized in that: The bottom of the rectangular piston (3310) is fixedly connected to a wheel frame (337), the outer side of the wheel frame (337) is fixedly connected to a drive motor (331), and the drive motor (331) is fixedly connected to a guide wheel (336) via an output shaft.

10. A courier packaging box, characterized in that: The express packaging box is processed by the express packaging box processing method described in any one of claims 1 to 9, the express packaging box comprising a bottom plate (1), the outer side of the bottom plate (1) is provided with side plates (11) and panels (12) symmetrically distributed in pairs, the panel (12) is provided with a top plate (121) on the side away from the bottom plate (1), the outer side of the side plate (11) is fixedly connected with two symmetrically distributed adhesive blocks (111), the middle of the adhesive block (111) is provided with a downwardly concave pressing groove 1 (112), and the two sides of the panel (12) are provided with downwardly concave pressing groove 2 (122), and creases are provided between the bottom plate (1), the side plates (11), the panel (12), the adhesive blocks (111) and the top plate (121).

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