Fresh food packaging box and manufacturing process thereof

Abstract

The present application relates to the technical field of packaging boxes, and in particular to a fresh food packaging box, comprising a base plate, a pair of front and rear side panels of equal size symmetrically disposed on both sides of the base plate, and a pair of left and right side panels of equal size symmetrically disposed at both ends of the base plate. The front and rear side panels and the left and right side panels are both capable of folding upward and forming a box structure with the base plate for containing items. The front and rear side panels are connected to a cover panel on the side away from the base plate, and both ends of the front and rear side panels are provided with a snap-fit member, the snap-fit member comprising snap-fit plates symmetrically disposed at both ends of the front and rear side panels, the snap-fit plates being capable of folding inside the box body, and snap-fit holes being provided on both the left and right side panels and the cover panel, and the snap-fit plates being snap-fitted into the snap-fit holes. The present application also relates to a manufacturing process for a fresh food packaging box, comprising the following steps: pressing the box sheet material; cutting the box sheet material; performing an indentation process; and collecting the cartons. The present application has the effect of reducing the time required to form the packaging box, improving packaging efficiency, and enabling the packaging box to be recycled and reused.

Description

Technical Field

[0001] The present application relates to the technical field of packaging boxes, and in particular to a fresh food packaging box and a manufacturing process thereof. Background Art

[0002] Packaging boxes are widely used in people's daily production and life. They are mostly used to store and organize items, or to put items into cartons for handling and transportation. For example, various packaging boxes for fruits or food. During the peak season of fruit harvest, freshly picked fruits can be packaged and transported to all parts of the country in a timely manner, which can enable fruit farmers to achieve higher economic benefits.

[0003] When packaging fresh produce, fresh produce is typically packaged in a box made of integrally formed corrugated paper. A closed square or rectangular box forms the main body of the box, with the bottom and top of the box respectively consisting of four or two cardboard sheets connected to the side panels. The bottom (top) cardboard sheets are folded together to seal the box. When such a box is used, both the bottom and top need to be sealed with tape or stapled. Furthermore, when the objects placed in the box are too heavy, the bottom of the box, which is folded separately, can easily be stretched and broken by the packaging, causing damage to the packaging.

[0004] When the output of fresh goods is large, the use of packaging boxes will also increase. In order to increase the speed of packaging, the packaging boxes used are often foldable. The existing folding cartons still need transparent tape or the like for auxiliary fixation when folding and forming, which adds an auxiliary fixation process, increases the time for packaging box forming, and also wastes resources. Moreover, after the packaging boxes are filled with fruits, they will be stacked in rows, taking up a large space and cannot be reused subsequently. Summary of the Invention

[0005] In order to reduce the time of forming a packaging box, improve the efficiency of packaging, and make the packaging box recyclable, the present application provides a fresh food packaging box and a manufacturing process thereof.

[0006] In the first aspect, the present application provides a fresh food packaging box, which adopts the following technical solution:

[0007] A fresh food packaging box includes a bottom plate, a pair of front and rear side panels of the same size are symmetrically arranged on both sides of the bottom plate, and a pair of left and right side panels of the same size are symmetrically arranged at both ends of the bottom plate, the front and rear side panels and the left and right side panels can all be folded toward the same side and form a box structure for holding items with the bottom plate, the front and rear side panels are connected to a cover plate on the side away from the bottom plate, and both ends of the front and rear side panels are provided with clips, the clips include clips symmetrically arranged at both ends of the front and rear side panels, the clips can be folded inside the box, the left and right side panels and the cover plate are provided with clip holes, and the clips are clipped into the clip holes.

[0008] By adopting the above technical solution, when using the packaging box to pack fresh items, the user can quickly fold and assemble the packaging box. During the folding process, the front and rear side panels and the left and right side panels are connected by cooperating with the provided snap-in holes and snap-in plates to form a box structure for packaging items. During the folding process of the packaging box, since no tape bonding and binding methods are used, the time for folding the packaging box is greatly saved and the efficiency of folding each packaging box is improved. In addition, using the quick method of snap-in cooperation, when the packaging box is used up, the user can also quickly disassemble the packaging box into a cardboard shape, which is convenient for stacking and reduces the floor space. During the disassembly process, the structure of the carton will not be damaged, which is convenient for subsequent reuse, saving resources, and avoiding environmental pollution.

[0009] Optionally, a pair of mutually fitting clamping plates are provided at the ends of the front and rear side panels, and a clamping block is provided on the upper side of the clamping plate close to the cover plate. The two clamping blocks are connected to each other away from the sides of the clamping plate, and a clamping portion is formed on the same side of the two clamping blocks away from the clamping plate, and the clamping portion is clamped and fitted in the clamping hole.

[0010] By adopting the above technical solution, a pair of clamping plates and clamping blocks arranged on the clamping plates are provided, and the two clamping blocks are connected into an integrated structure, which can increase the strength of the clamping blocks, so that the clamping blocks can be repeatedly plugged into and matched with the clamping holes, and prevent the paper clamping blocks from becoming soft after the single-layer clamping blocks are matched with the clamping holes many times, resulting in a reduction in the connection strength between the cover plate and the left and right side plates, and an inability to effectively connect the cover plate and the left and right side plates.

[0011] Optionally, a second side panel of the same size is provided in parallel on the inner sides of the left and right side panels, and a connecting plate connecting the left and right side panels and the second side panels away from the upper side edges of the bottom panel is provided, and a pair of clipping plates at the ends of the front and rear side panels are located between the left and right side panels and the second side panels, and the clipping holes are provided on the connecting plate, and the clipping portion can pass upward through the clipping holes on the connecting plate.

[0012] By adopting the above technical solution, a double-layer structure is formed between the second side panel and the left and right side panels. When the packaging boxes full of items are stacked, the force strength between the left and right side panels and the second side panels of the double-layer structure can be increased, so that the packaging boxes can be stacked in multiple layers, preventing the packaging boxes from being unable to withstand a large gravity after being stacked on each other, and crushing the fresh items inside the packaging boxes; in addition, when there are too many items in the packaging box and they are squeezed outward, the left and right side panels and the second side panels of the double-layer structure increase the connection strength between the front and rear side panels, preventing the packaging boxes from breaking at the connection position, thereby avoiding damage to the packaging boxes.

[0013] Optionally, fixing holes are provided at the ends of the bottom plate close to the left and right side plates, and fixing blocks are provided on the lower side of the second side plate close to the bottom plate, and the fixing blocks are plugged into the fixing holes.

[0014] By adopting the above technical solution, when the second side panel is folded onto the snap-on plate, the fixing block on the second side panel can be plugged into the fixing hole to fix the second side panel, preventing the lower edge of the second side panel from opening inside the packaging box and affecting the loading of fresh items. In addition, after the fixing block is plugged into the fixing hole, the left and right side panels and the second side panel can firmly fix the snap-on plate to the bottom plate.

[0015] Optionally, the clamping portion passes through the upper surface of the cover plate upward, and when two or more packaging boxes are stacked, the clamping portion is inserted and fitted into the corresponding fixing hole of the upper packaging box.

[0016] By adopting the above technical solution, when a large number of packaging boxes are filled with fresh items, users can stack the packaging boxes and place them. The clip-on parts on the lower packaging box can be inserted into the fixed holes on the bottom plate of the corresponding upper packaging box to form a connection between the upper and lower adjacent packaging boxes, preventing the packaging boxes from tipping over when the number of stacked layers is too large.

[0017] Optionally, a clearance opening is provided on the lower side of the clamping plate at a position opposite to the fixing hole.

[0018] By adopting the above technical solution, when the upper packaging box is placed on the lower packaging box, the clip part can be smoothly and fully inserted into the fixing hole, thereby increasing the connection effect between the upper and lower packaging boxes and avoiding the lower side of the clip plate from being blocked at the fixing hole, so that the clip part cannot be inserted upward into the fixing hole.

[0019] Optionally, hand holes are provided on the left and right side panels.

[0020] By adopting the above technical solution, the provided hand holes make it convenient for users to carry the packaging boxes to the stacking location.

[0021] Optionally, cushioning cotton is provided on the inner surfaces of the front and rear side panels.

[0022] By adopting the above technical solution, when fresh food is placed inside the packaging box, the cushioning cotton can reduce the shaking of the fresh food during transportation and prevent the fresh food from being damaged by repeated impact on the inner surface of the packaging box.

[0023] Optionally, ventilation holes are provided at the connection between the cover plate and the front and rear side plates.

[0024] By adopting the above technical solution, when the packaging boxes are stacked and stored, the opening above the packaging box is pressed by the upper box, and the provided ventilation holes can ventilate the interior of the packaging box, thereby maintaining the freshness of fresh items and preventing them from being damaged.

[0025] In a second aspect, the present application provides a process for manufacturing a fresh food packaging box, which adopts the following technical solution:

[0026] A process for manufacturing a fresh food packaging box comprises the following steps:

[0027] Press the box body sheet and compact the original coil of multi-layer packaging box through the set compacting device;

[0028] Cutting the box sheet, cutting the compacted sheet into the initial shape of the box;

[0029] Indentation treatment: creases are pressed on the cut box sheet at the position where folding is required;

[0030] Carton collection: neatly stack and collect the indented cartons.

[0031] By adopting the above-mentioned technical solution, the production process of the environmentally friendly packaging box of this application is simple, and all processes can be realized in-line automated production, with fewer manual operation links, saving time and labor, and at the same time meeting the requirements of green environmental protection. There is no need to use sealing tape and binding to seal the box, reducing pollution to the environment, and it is suitable for large-scale production and industrial applications.

[0032] In summary, this application includes at least one of the following beneficial technical effects:

[0033] 1. When packing, the user can quickly fold and assemble the packaging box provided by the present application. During the folding process, the front and rear side panels and the left and right side panels are connected by cooperating snap-on holes and snap-on plates to form a box structure for packaging items. In addition, since the packaging box does not use adhesive tape or binding during the folding process, the time for folding the packaging box is greatly saved and the efficiency of folding each packaging box is improved.

[0034] 2. This application uses a quick snap-fit fixing method. When the packaging box is finished, the user can quickly disassemble the packaging box into a cardboard shape, which is convenient for collection and sorting, reducing the floor space. During the disassembly process, the overall structure of the cardboard box will not be damaged, which facilitates subsequent reuse, saves resources, and avoids causing environmental pollution.

[0035] 3. The clamping block and the pair of clamping plates provided on the clamping plate connect the two clamping blocks into an integrated structure, thereby increasing the strength of the clamping block and enabling the clamping block to be repeatedly plugged into and engaged with the clamping hole, allowing the packaging box to be reused. This also prevents the paper clamping block from becoming soft after multiple engagements between the single-layer clamping block and the clamping hole, resulting in a reduction in the connection strength between the cover plate and the left and right side panels, and an inability to effectively connect the cover plate and the left and right side panels.

[0036] 4. The double-layer structure between the left and right side panels and the second side panel can increase the stress-bearing strength of the packaging box, so that the packaging boxes can be stacked in multiple layers, preventing the packaging boxes from being unable to withstand the large gravity after being stacked on each other and crushing the fresh items inside the packaging box. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 This is a schematic diagram of the overall structure of the packaging box according to an embodiment of the present application;

[0038] Figure 2 This is a schematic diagram showing the internal structure of a packaging box according to an embodiment of the present application;

[0039] Figure 3 This is a process step diagram of the packaging box manufacturing process according to the embodiment of the present application.

[0040] Explanation of the accompanying reference numerals: 1. Bottom plate; 11. Fixing hole; 2. Front and rear side panels; 21. Buffer cotton; 22. Ventilation hole; 3. Left and right side panels; 31. Handle hole; 4. Snap-on component; 41. Snap-on plate; 411. Makeway; 42. Snap-on block; 5. Cover plate; 6. Second side panel; 61. Connecting plate; 62. Fixing block; 7. Snap-on hole. DETAILED DESCRIPTION

[0041] The following is combined with Figure 1-3 This application is described in further detail.

[0042] The embodiment of the present application discloses a fresh food packaging box.

[0043] Reference Figure 1 and Figure 2The left and right side panels 3 are folded together to form a rectangular box structure.

[0044] A cover plate 5 is fixedly connected to the upper side edges of the front and rear side panels 2 away from the bottom plate 1. The length direction of the cover plate 5 is the same as the length direction of the front and rear side panels 2. The cover plate 5 and the front and rear side panels 2 are an integrally formed structure of corrugated paper. The cover plate 5 can be folded along the connection between it and the front and rear side panels 2 so that the cover plate 5 and the front and rear side panels 2 are in a vertical state, and the cover plates 5 on both sides of the box body can cover the upper opening of the box body. When fresh items are placed inside the box body, the two cover plates 5 can prevent the fresh items from falling out of the packaging box during transportation.

[0045] Reference Figure 1 and Figure 2 The clipping member 4 includes a clipping plate 41 symmetrically arranged at both ends of the front and rear side panels 2. A pair of clipping plates 41 are provided at the ends of the front and rear side panels 2. The length direction of the two clipping plates 41 is the same as the length direction of the left and right side panels 3, and the two clipping plates 41 are perpendicular to the bottom panel 1 and the front and rear side panels 2. The two clipping plates 41 are located on the inner sides of the left and right side panels 3. The ends of the clipping plates 41 located on the outer sides of the two clipping plates 41 are connected to the ends of the front and rear side panels 2. The clipping plates 41 and the front and rear side panels 2 are integrally formed, and the clipping plates 41 can be folded into the interior of the packaging box along the end edges of the front and rear side panels 2; The upper side edges of 41 are fixedly connected with a snap-in block 42, and the two snap-in blocks 42 are connected and fixed away from the side edges of the snap-in plate 41. The snap-in plate 41 located on the inner side can be folded along the connection between the two snap-in blocks 42. When assembling the packaging box, the user first folds the snap-in plate 41 close to the inner side of the packaging box so that the two snap-in plates 41 fit together after folding, and then folds the two snap-in plates 41 along the end edges of the front and rear side panels 2 so that the two snap-in plates 41 can be folded into the inside of the packaging box, reaching a state perpendicular to the bottom plate 1 and the front and rear side panels 2, and after the left and right side panels 3 are folded, they can fit together with the snap-in plates 41.

[0046] On the inner side of the left and right side panels 3 and in parallel with the inside of the box, a second side panel 6 is provided. The second side panel 6 is the same size as the left and right side panels 3, and a certain gap is provided between the second side panel 6 and the left and right side panels 3. The two clamping plates 41 are located between the left and right side panels 3 and the second side panel 6. A connecting plate 61 is fixedly connected to the upper edge of the left and right side panels 3 and the second side panel 6 away from the bottom plate 1. The length direction of the connecting plate 61 is the same as the length direction of the left and right side panels 3 and the second side panel 6. The second side panel 6 and the connecting plate 61 are both integrated with the left and right side panels 3. The left and right side panels 3 and the second side panels 6 are arranged in a type, and both the left and right side panels 3 and the second side panels 6 can be folded along the two side edges of the connecting plate 61. The folded left and right side panels 3 and the second side panels 6 can wrap the snap-on plate 41 inside, so as to fix the two sets of snap-on plates 41 at the same end of the front and rear side panels 2, and the arranged second side panels 6 can increase the strength of the left and right side panels 3. When the packaging boxes are filled with fresh items and are stacked, the left and right side panels 3 and the second side panels 6 form a double-layer structure, so that the packaging boxes can withstand greater gravity and avoid the packaging boxes being crushed after being stacked.

[0047] Furthermore, a pair of fixing holes 11 are opened at the edge positions of both ends of the bottom plate 1, and the two fixing holes 11 are evenly distributed along the width direction of the bottom plate 1, and the two fixing holes 11 are arranged corresponding to the two groups of clip plates 41, and the two clip plates 41 are arranged across the fixing holes 11, and a pair of fixing blocks 62 are fixedly connected to the lower edge of the second side panel 6 close to the bottom plate 1, and the two fixing blocks 62 can be inserted and matched in the corresponding fixing holes 11. When the second side panel 6 is folded and set inside the packaging box, the user inserts the two fixing blocks 62 into the corresponding fixing holes 11, thereby fixing the second side panel 6. After the second side panel 6 is fixed, the two groups of clip plates 41 are fixed.

[0048] Reference Figure 1 and Figure 2, a snap-fitting hole 7 is provided on the connecting plate 61 and at the position of the two snap-fitting blocks 42. When the connecting plate 61 is folded and arranged above the two snap-fitting plates 41, the two snap-fitting blocks 42 can form a snap-fitting portion, which passes through the snap-fitting hole 7 upward and enables the connecting plate 61 to be pressed tightly against the two snap-fitting plates 41. Therefore, by cooperating with the snap-fitting blocks 42 and the snap-fitting holes 7, the two snap-fitting plates 41 can be firmly fixed between the left and right side panels 3 and the second side panel 6, preventing the front and rear side panels 2 from being stretched outwards and damaging the box body due to too many items being loaded during transportation of the packaging box; a similar snap-fitting hole 7 is provided at the end of the cover plate 5 and at the position of the snap-fitting portion. When the packaging box is After the items inside the box are packed, the user covers the cover plate 5 on the upper opening of the packaging box, and aligns the snap-in holes 7 on the cover plate 5 with the snap-in parts, so that the snap-in parts can pass through the snap-in holes 7 on the cover plate 5, thereby fixing the cover plate 5 on the snap-in parts; after the snap-in parts pass upward through the snap-in holes 7 on the cover plate 5, the ends of the snap-in parts are higher than the upper surface of the cover plate 5. When a large number of packaging boxes are filled with fresh items, the packaging boxes can be stacked and placed, and the snap-in parts on the lower packaging boxes can be plugged into the corresponding fixing holes 11 on the bottom plate 1 of the upper packaging box, so that the upper and lower adjacent packaging boxes are connected to prevent the packaging boxes from tipping over after too many layers of packaging boxes are stacked.

[0049] Furthermore, a clearance opening 411 is provided on the lower side of the two clamping plates 41 facing the fixing hole 11. The size of the clearance opening 411 is larger than the size of the fixing hole 11. When the upper packaging box is placed on the lower packaging box, the clamping part can be smoothly plugged into the fixing hole 11 to avoid the lower side of the clamping plate 41 being blocked at the fixing hole 11, so that the clamping part cannot be inserted upward into the fixing hole 11; a buckle hole 31 is provided in the middle position of the left and right side panels 3. When the user has finished loading the fresh items, the buckle hole 31 is provided. The hole 31 makes it convenient for users to carry the packaging box to the stacking position; cushioning cotton 21 is provided on the inner surface of the front and rear side panels 2. When fresh items are placed inside the packaging box, the fresh items are prevented from shaking back and forth during transportation; multiple ventilation holes 22 are provided at the connection position of the front and rear side panels 2 and the cover plate 5. When the packaging boxes are stacked, the opening above the packaging box is pressed by the upper box, and the provided ventilation holes 22 can ventilate the interior of the packaging box, thereby maintaining the freshness of the fresh items and preventing them from being damaged.

[0050] The method of using a fresh food packaging box in an embodiment of the present application is as follows: when the packaging box needs to be used to hold fresh items, the user folds and assembles the packaging box, first folds the front and rear side panels 2 upwards, and folds the two snap-on panels 41 onto the bottom panel 1, and then folds the left and right side panels 3 and the second side panel 6, so that the second side panel 6 wraps the snap-on panels 41, and allows the fixing blocks 62 on the second side panel 6 to be plugged into the fixing holes 11, thereby connecting the front and rear side panels 2 and the left and right side panels 3, and then folds the other side edges of the packaging box. After folding, fresh items are placed inside the packaging box. After filling, the snap-on holes 7 on the two cover panels 5 are buckled onto the snap-on parts to fix the cover panels 5.

[0051] The embodiment of the present application also discloses a process for manufacturing a fresh food packaging box.

[0052] Reference Figure 2 and Figure 3 A manufacturing process of a fresh food packaging box includes the following steps:

[0053] S1: Pressed box board;

[0054] According to the needs of the packaging boxes to be made, different quantities of kraft paper rolls are selected, and the initial raw material kraft paper rolls are installed on the unwinding device for making packaging boxes. A compacting device for pressing the kraft paper rolls is set in the next process of the unwinding device. One end of multiple rolls of kraft paper rolls are passed through the compacting device, and the multiple layers of kraft paper rolls are compacted by the compacting device to form the initial state of the carton sheet.

[0055] The unwinding device is provided with an adhesive component, which includes a water spraying part installed on the unwinding device and located under each kraft paper roll. The water spraying part includes a plurality of water spraying pipes arranged under the unwinding roll, and the plurality of water spraying pipes are evenly distributed along the width direction of the roll. The plurality of water spraying pipes are connected into a whole through a main pipe. A water tank and a water pump installed on the water tank are provided outside the unwinding device. When spraying water on the roll, the water pump pumps the water in the water tank to the inside of the main pipe, and sprays water onto the surface of the roll through each water spraying pipe, thereby infiltrating the kraft paper roll in advance; the adhesive component also includes a glue spraying part arranged on the unwinding device, and the number of the glue spraying parts is more than that of the kraft paper roll. The number of paper rolls is one less, and the glue spraying part is arranged at the position where the multiple layers of kraft paper rolls are to be laminated and bonded. The glue spraying part includes a glue spraying tube with the same structure as the water spraying part, a glue box for containing glue arranged outside the unwinding device, and a glue pump installed on the glue box. In the embodiment of the present application, the glue is a starch slurry with a concentration of 8%-15%. The environmentally friendly glue made of starch slurry will not pollute the environment during use, and the starch slurry glue has strong adhesion. During the glue spraying process, the glue pump sprays the glue through each glue spraying tube onto the surface between two adjacent layers of kraft paper rolls. When the glue spraying is completed, the multiple layers of kraft paper rolls are compacted by the compacting device to form a carton sheet.

[0056] Furthermore, after the multiple layers of kraft paper coils are compacted, a drying device is provided to dry the carton board material. The drying device includes a plurality of hot air blowers arranged above and below the box body board material. The plurality of hot air blowers are evenly distributed along the width direction of the carton board material, and the air outlets of the hot air blowers are all set toward the carton board material. When the carton board material is compacted, the moisture on the surface of the carton and the glue between the two adjacent layers of kraft paper coils are not completely dried, so that the carton board material itself is still in a flexible state. Using a hot air blower for drying can quickly dry the moisture and glue on the carton board material, so that the carton board material reaches a fixed state.

[0057] S2: Cut the carton sheet material processed and shaped in step S1 so that the cut carton sheet material forms the initial state of the packaging box. During the cutting process, the bottom plate 1, the front and rear side plates 2, the left and right side plates 3, the cover plate 5, the snap-on plate 41 and the second side plate 6 are in an integrated state; during the cutting process, a hole cutting machine is used to cut out the fixing holes 11, the snap-on holes 7, the ventilation holes 22, the clearance openings 411 and the hand holes 31.

[0058] S3: The cut sheet is indented. During the indentation process, a creasing machine is used to indent the positions that need to be folded. The positions that need to be indented are: the connection between the sides of the bottom plate 1 and the front and rear side plates 2 and the left and right side plates 3, the connection between the front and rear side plates 2 and the cover plate 5, the connection between the two sides of the connecting plate 61 and the left and right side plates 3 and the second side, and the connection between the snap-in plate 41 and the front and rear side plates 2. After the indentation treatment, the bottom plate 1, front and rear side plates 2, left and right side plates 3, cover plate 5, second side plate 6 and connecting plate 61 can be clearly seen on the carton sheet, which is convenient for subsequent users to fold.

[0059] S4: Collection and sorting. After the carton board is indented, the staff will stack and collect the processed packaging boxes. When fresh items need to be packed, the packaging box boards will be folded.

[0060] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A fresh food packaging box, characterized by: The box comprises a bottom plate (1), a pair of front and rear side plates (2) of the same size are symmetrically arranged on both sides of the bottom plate (1), a pair of left and right side plates (3) of the same size are symmetrically arranged at both ends of the bottom plate (1), the front and rear side plates (2) and the left and right side plates (3) can be folded toward the same side and form a box structure for containing items with the bottom plate (1), the front and rear side plates (2) are connected to a cover plate (5) on the side away from the bottom plate (1), and the two ends of the front and rear side plates (2) are provided with a snap-fitting member (4), the snap-fitting member (4) includes a snap-fitting plate (41) symmetrically arranged at the two ends of the front and rear side plates (2), and the snap-fitting plate (41) can be folded inside the box, the left and right side plates (3) and the cover plate (5) are provided with a snap-fitting hole (7), and the snap-fitting plate (41) is snap-fitted in the snap-fitting hole (7); The ends of the front and rear side panels (2) are each provided with a pair of mutually fitting clamping plates (41), and the clamping plates (41) are provided with a clamping block (42) near the upper side of the cover plate (5), and the two clamping blocks (42) are connected to each other at the sides away from the clamping plates (41), and the two clamping blocks (42) form a clamping portion on the same side away from the clamping plates (41), and the clamping portion is clamped and fitted in the clamping hole (7); the clamping portion passes through the upper surface of the cover plate (5) upward, and when two or more packaging boxes are stacked, the clamping portion is plugged and fitted in the corresponding fixing hole (11) of the upper packaging box; The inner sides of the left and right side panels (3) are provided with second side panels (6) of the same size in parallel, and the left and right side panels (3) and the second side panel (6) are provided with a connecting plate (61) connecting the two at the upper side away from the bottom panel (1), and a pair of clamping plates (41) at the ends of the front and rear side panels (2) are located between the left and right side panels (3) and the second side panel (6), and the clamping hole (7) is provided on the connecting plate (61), and the clamping portion can pass through the clamping hole (7) on the connecting plate (61) upward; the bottom panel (1) is provided with a fixing hole (11) at the end near the left and right side panels (3), and a fixing block (62) is provided on the lower side of the second side panel (6) near the bottom panel (1), and the fixing block (62) is plugged into the fixing hole (11); A clearance opening (411) is provided on the lower side of the snap-on plate (41) and at a position opposite to the fixing hole (11); hand holes (31) are provided on the left and right side panels (3); cushioning cotton (21) is provided on the inner surfaces of the front and rear side panels (2); and ventilation holes (22) are provided at the connection between the cover plate (5) and the front and rear side panels (2).

2. A process for manufacturing a fresh food packaging box according to claim 1, characterized in that: The following steps are involved: Press the box body sheet and compact the original coil of multi-layer packaging box through the set compacting device; Cutting the box sheet, cutting the compacted sheet into the initial shape of the box; Indentation treatment: creases are pressed on the cut box sheet at the position where folding is required; Carton collection: neatly stack and collect the indented cartons.

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