Small steel cylinder packaging box forming device

By introducing a guide plate, a temporary storage frame, and a pressing assembly into the case erector, the problem of flat packaging boxes tipping over during material feeding is solved, a stable feeding process is achieved, and the automation level of the case erector is improved.

CN224257087UActive Publication Date: 2026-05-19CHONGQING TONGHUI GAS
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
CHONGQING TONGHUI GAS
Filing Date
2025-06-30
Publication Date
2026-05-19

AI Technical Summary

Technical Problem

When filling materials, flat packaging boxes tend to tip backward, making it inconvenient to fill them with materials.

Method used

A small steel cylinder packaging box forming device was designed, including a guide plate, a temporary storage frame and a pressing component. The first pressing plate is driven away from and closer to the discharge port by the driving component. The cooperation of the first and second pressing plates ensures that the flat packaging box remains fixed during the filling process.

Benefits of technology

This effectively prevents flat packaging boxes from tipping backward during material filling, ensuring a smooth filling process and improving the convenience of material filling.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model provides a small steel cylinder packing box forming device which comprises a box unpacking machine body and a packing box storage mechanism, and the packing box storage mechanism comprises a material guide plate, a temporary storage frame and a material pressing assembly. Added flat packaging boxes are placed between the second pressing plates and the first pressing plates, then the two first pressing plates are driven by the driving assembly to move relatively away from each other to open the discharging openings, pressure on the front flat packaging boxes is eliminated, and the second pressing plates drive the flat packaging boxes in the temporary storage frame to move forwards to be attached to the front flat packaging boxes. And then the temporary storage frame is moved backwards, when all the flat packaging boxes in the temporary storage frame are moved out, the driving assembly drives the two sets of first pressing plates to move and reset relatively to apply pressure to the flat packaging boxes, and the second pressing plates are separated from the flat packaging boxes, so that the material adding operation is completed. And in the feeding process, pressure can be continuously applied to the front flat packaging box for fixation, the front flat packaging box is prevented from toppling over backwards during feeding, and feeding is convenient.
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Description

Technical Field

[0001] This utility model relates to the field of packaging box forming technology, specifically to a device for forming small steel cylinder packaging boxes. Background Technology

[0002] A case erector is an automated packaging device primarily used to automatically open, shape, and seal (or partially seal) folded packaging boxes before conveying them to subsequent packing processes. It is widely used in automated production lines in industries such as food, beverages, daily chemicals, pharmaceuticals, and electronics, significantly improving packaging efficiency and reducing labor costs.

[0003] Existing carton openers mainly include: 1. a box storage mechanism for storing flat boxes with automatic feeding; 2. a suction mechanism for gripping boxes using vacuum suction cups; 3. a forming mechanism for unfolding boxes using robotic arms or guide rollers; 4. a lid-sealing system for folding the bottom cover using cylinders or belts (hot melt adhesive or tape sealing is optional); and 5. a control system with PLC programming and adjustable parameters (such as box size and speed). However, the box storage mechanisms in existing carton openers are mostly simple in structure. When adding material, the pressure plate needs to be moved upward to leave a gap for adding material. However, after the pressure plate moves upward, it loses its pressure on the flat boxes in front, which can easily cause the flat boxes to tip backward when gripped by the vacuum suction cups, making material addition inconvenient. Therefore, to address the above technical problems, a small steel cylinder box forming device is proposed. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model proposes a small steel cylinder packaging box forming device, which prevents the flat packaging box in front from tilting backward during material filling, making material filling convenient.

[0005] A small steel cylinder packaging box forming device includes a box opening machine body and a packaging box storage mechanism, wherein the packaging box storage mechanism includes:

[0006] The guide plate is inclinedly arranged on the body of the carton opener, with its lower end close to the vacuum suction cup in the body of the carton opener. Two sets of baffles are arranged at intervals along the vertical direction at the lower end of the guide plate.

[0007] A temporary storage frame is slidably disposed at the top of the guide plate along the inclined direction of the guide plate, and a connecting outlet is provided on the side near the lower end of the guide plate; and

[0008] The pressing assembly includes a first pressing plate, a driving assembly, a second pressing plate, and a first spring. Two sets of the first pressing plates are slidably disposed on the discharge port side. The driving assembly is disposed on the temporary storage frame and connected to the two sets of the first pressing plates, and is used to drive the two sets of the first pressing plates to move away from each other to open the discharge port and move closer to each other to reset. The second pressing plate is slidably disposed in the temporary storage frame. The first spring connects the second pressing plate and the temporary storage frame, and is used to apply a thrust to the second pressing plate to move closer to the first pressing plate.

[0009] The beneficial effects of the above-mentioned small steel cylinder packaging box forming device are:

[0010] By placing the added flat packaging box within the temporary storage frame, positioned between the second and first pressure plates, the first spring contracts, and the second pressure plate applies pressure to the flat packaging box within the temporary storage frame. Then, the drive assembly moves the two sets of first pressure plates away from each other, opening the discharge port. At this point, the pressure from the two sets of first pressure plates is released from the front flat packaging box. Simultaneously, the first spring extends, causing the second pressure plate to move the flat packaging box within the temporary storage frame forward to fit against the front flat packaging box. The second pressure plate then applies pressure to the front flat packaging box. Finally, the box moves backward. When the temporary storage frame is activated, the first spring continues to extend, causing the second pressure plate to continuously apply pressure to the flat packaging box in front. When all the flat packaging boxes in the temporary storage frame are removed, the two sets of first pressure plates are driven to move closer and reset relative to each other through the drive assembly. The relative movement and reset of the two sets of first pressure plates can apply pressure to the flat packaging box and separate the second pressure plate from the flat packaging box, thereby completing the feeding operation. During the feeding process, pressure can be continuously applied to the flat packaging box in front to fix it, preventing the flat packaging box in front from tilting backward during feeding, making feeding convenient.

[0011] In one embodiment, the guide plate further includes an adjustment assembly, which includes a first screw. A guide rod is vertically arranged on one side of the lower end of the guide plate, and the first screw is vertically and rotatably arranged on the other side. One set of baffles is fixed to the lower end of the guide plate, and one end of another set of baffles is slidably sleeved on the guide rod in a vertical direction, and the other end is threadedly connected to the first screw.

[0012] In one embodiment, a first guide block is provided on both sides of the temporary storage frame, and a first guide groove is provided on both sides of the guide plate. The two sets of first guide blocks are slidably disposed in the two sets of first guide grooves along the inclined direction of the guide plate.

[0013] In one embodiment, the drive assembly includes a pull rod, a second spring, a rack, gears, and a second screw; a handle is provided on the side of the temporary storage frame near the high end of the guide plate, the pull rod is slidably mounted on the handle, the second spring connects the handle and the pull rod, and is used to apply a thrust to the pull rod to move closer to the temporary storage frame, the rack is provided at both ends of the pull rod, the gears are rotatably mounted on both sides of the temporary storage frame, two sets of gears mesh with two sets of racks, the second screw is coaxially mounted on both sets of gears, the helical lines of the two sets of second screws are opposite, and they are respectively threadedly connected to the two sets of first pressure plates.

[0014] In one embodiment, two sets of positioning shafts are arranged opposite each other at the bottom of the handle, and the pull rod is slidably sleeved on the two sets of positioning shafts. The second spring is sleeved on both sets of positioning shafts, and the two ends of the second spring abut against the handle and the pull rod respectively.

[0015] In one embodiment, two sets of T-shaped grooves are provided opposite to each other on the discharge port side, and T-shaped sliders are provided on both sets of first pressure plates. The two sets of T-shaped sliders are slidably disposed in the two sets of T-shaped grooves.

[0016] In one embodiment, two sets of second guide grooves are provided opposite to each other in the temporary storage frame. Guide shafts are arranged parallel to each other in the two sets of second guide grooves. Second guide blocks are provided at both ends of the second pressure plate. The two sets of second guide blocks are slidably disposed in the two sets of second guide grooves and sleeved on the two sets of guide shafts. The first spring is sleeved on each set of guide shafts. The two ends of the first spring are respectively connected to the end of the second guide groove and the side wall of the second guide block away from the first pressure plate.

[0017] In one embodiment, a guide plate is inclinedly disposed at the top of the second pressure plate. Attached Figure Description

[0018] To more clearly illustrate the specific embodiments of this utility model, the accompanying drawings used in the specific embodiments will be briefly described below. In all the drawings, the elements or parts are not necessarily drawn to scale.

[0019] Figure 1 A three-dimensional structural schematic diagram of a small steel cylinder packaging box forming device provided in an embodiment of this utility model;

[0020] Figure 2 for Figure 1 The diagram shows a three-dimensional structure of the small steel cylinder packaging box forming device in the material feeding state.

[0021] Figure 3 for Figure 1 An exploded view of the small steel cylinder packaging box forming device shown;

[0022] Figure 4 for Figure 1 An exploded view of the pressing component in the small steel cylinder packaging box forming device shown;

[0023] Figure 5 for Figure 4 An enlarged schematic diagram of region A in the middle.

[0024] Figure label:

[0025] 1. Flat packaging box;

[0026] 10. Guide plate; 101. Baffle; 102. First screw; 103. Guide rod; 104. First guide groove;

[0027] 20. Temporary storage frame; 201. Discharge port; 202. First guide block; 2021. T-shaped chute; 203. Handle; 2031. Positioning shaft; 204. Second guide groove; 2041. Guide shaft;

[0028] 30. First pressure plate; 301. Second pressure plate; 3011. Second guide block; 3012. Guide plate; 302. First spring; 303. Pull rod; 304. Second spring; 305. Rack; 306. Gear; 307. Second screw; 308. T-shaped slider. Detailed Implementation

[0029] The embodiments of the present invention will now be described in detail with reference to the accompanying drawings. These embodiments are merely illustrative of the present invention and should not be construed as limiting the scope of protection of the present invention.

[0030] Please see Figures 1 to 3 One embodiment of the small steel cylinder packaging box forming device includes a box opening machine body and a packaging box storage mechanism. The packaging box storage mechanism includes a guide plate 10, a temporary storage frame 20 and a pressing component.

[0031] Specifically, the guide plate 10 is inclinedly mounted on the body of the carton opener, with its lower end close to the vacuum suction cup in the body of the carton opener. Two sets of baffles 101 are arranged at intervals along the vertical direction at the lower end of the guide plate 10. The temporary storage frame 20 is slidably mounted on the top of the guide plate 10 along the inclined direction of the guide plate 10, and a connecting discharge port 201 is opened on the side near the lower end of the guide plate 10. The pressing assembly includes a first pressing plate 30, a driving assembly, a second pressing plate 301, and a first spring 302. Two sets of first pressing plates 30 are slidably mounted on the side of the discharge port 201. The driving assembly is mounted on the temporary storage frame 20 and connected to the two sets of first pressing plates 30, and is used to drive the two sets of first pressing plates 30 to move away from each other to open the discharge port 201 or move closer to each other to reset. The second pressing plate 301 is slidably mounted inside the temporary storage frame 20. The first spring 302 connects the second pressing plate 301 and the temporary storage frame 20, and is used to apply a thrust to the second pressing plate 301 to move closer to the first pressing plate 30.

[0032] In the above embodiment, by placing the added flat packaging box 1 inside the temporary storage frame 20 and between the second pressure plate 301 and the first pressure plate 30, the first spring 302 contracts, and the second pressure plate 301 applies pressure to the flat packaging box 1 inside the temporary storage frame 20. Then, the driving assembly drives the two sets of first pressure plates 30 to move away from the open discharge port 201. At this time, the two sets of first pressure plates 30 release the pressure on the front flat packaging box 1. Simultaneously, the first spring 302 extends, causing the second pressure plate 301 to move the flat packaging box 1 inside the temporary storage frame 20 forward to fit against the front flat packaging box 1. At this time, the second pressure plate 301 applies pressure to the front flat packaging box 1. Applying pressure, the temporary storage frame 20 is moved backward. At this time, the first spring 302 continues to extend, causing the second pressure plate 301 to continuously apply pressure to the flat packaging box 1 in front. When all the flat packaging boxes 1 in the temporary storage frame 20 are removed, the two sets of first pressure plates 30 are driven to move closer and reset relative to each other through the drive assembly. The relative movement and reset of the two sets of first pressure plates 30 can make the first pressure plate 30 apply pressure to the flat packaging box 1 and separate the second pressure plate 301 from the flat packaging box 1, thereby completing the feeding operation. During the feeding process, pressure can be continuously applied to the flat packaging box 1 in front to fix it, preventing the flat packaging box 1 in front from tilting backward during feeding, making feeding convenient. It is understood that the body of the carton opener is existing technology, such as the SCK-40 carton opener, and its working principle will not be elaborated here.

[0033] Please see Figures 3 to 5In one embodiment, the drive assembly includes a pull rod 303, a second spring 304, a rack 305, a gear 306, and a second screw 307. A handle 203 is provided on the side of the temporary storage frame 20 near the high end of the guide plate 10. The pull rod 303 is slidably mounted on the handle 203. The second spring 304 connects the handle 203 and the pull rod 303 and is used to apply a thrust to the pull rod 303 to move closer to the temporary storage frame 20. A rack 305 is provided at both ends of the pull rod 303. Gears 306 are rotatably provided on both sides of the temporary storage frame 20. Two sets of gears 306 mesh with two sets of racks 305. A second screw 307 is coaxially provided on both sets of gears 306. The two sets of second screws 307 have opposite spiral lines and are threadedly connected to two sets of first pressure plates 30 respectively.

[0034] In the above embodiment, by holding the handle 203 and driving the pull rod 303 to move backward, the pull rod 303 moves backward, causing the second spring 304 to be compressed and contracted, which in turn drives the two sets of racks 305 to move. The movement of the two sets of racks 305 meshes with the two sets of gears 306, driving the two sets of second screws 307 to rotate. The rotation of the two sets of second screws 307 engages with the two sets of first pressure plates 30 through threaded engagement, thereby driving the two sets of first pressure plates 30 to move away from each other and open the discharge port 201. Conversely, the application of force to the pull rod 303 is canceled. The applied force and the reaction force of the second spring 304 cause the pull rod 303 to move in the opposite direction. The reverse movement of the pull rod 303 drives the two sets of racks 305 to move in the opposite direction and mesh with the two sets of gears 306 to drive the two sets of second screws 307 to rotate in the opposite direction. The reverse rotation of the two sets of second screws 307 and their threaded engagement with the two sets of first pressure plates 30 can drive the two sets of first pressure plates 30 to move closer to each other and reset. It is convenient to drive the two sets of first pressure plates 30 to move away from each other and open the discharge port 201, and to move closer to each other and reset.

[0035] Specifically, in the above embodiment, two sets of positioning shafts 2031 are arranged opposite each other at the bottom of the handle 203, and the pull rod 303 is slidably sleeved on the two sets of positioning shafts 2031. A second spring 304 is sleeved on each of the two sets of positioning shafts 2031, and the two ends of the second spring 304 abut against the handle 203 and the pull rod 303 respectively.

[0036] By setting two sets of positioning shafts 2031, the stability of the sliding of the pull rod 303 can be improved, and the extension and retraction of the second spring 304 can be guided, thereby improving the service life of the second spring 304.

[0037] Please see Figures 1 to 3 In one embodiment, the guide plate 10 further includes an adjustment assembly, which includes a first screw 102. A guide rod 103 is vertically arranged on one side of the lower end of the guide plate 10, and the first screw 102 is vertically and rotatably arranged on the other side. One set of baffles 101 is fixed to the lower end of the guide plate 10, and one end of another set of baffles 101 is slidably sleeved on the guide rod 103 in the vertical direction, and the other end is threadedly connected to the first screw 102.

[0038] In the above embodiment, the first screw 102 can be rotated to engage with the baffle 101 to drive the baffle 101 to move upward. The upward movement of the baffle 101 can adjust the distance between the two sets of baffles 101, thereby facilitating adjustment according to the height of the flat packaging box 1. This ensures that the two sets of baffles 101 can abut against the upper and lower edges of the flat packaging box 1, preventing the flat packaging box 1 from falling off the guide plate 10 when it is not gripped by the vacuum suction cup (not shown).

[0039] Please see Figure 2 and Figure 3 In one embodiment, a first guide block 202 is provided on both sides of the temporary storage frame 20, and a first guide groove 104 is provided on both sides of the guide plate 10. The two sets of first guide blocks 202 are slidably disposed in the two sets of first guide grooves 104 along the inclined direction of the guide plate 10. This improves the stability of the temporary storage frame 20 when it slides.

[0040] Please see Figure 3 and Figure 4 In one embodiment, two sets of T-shaped grooves 2021 are provided opposite to each other on the discharge port 201 side, and T-shaped sliders 308 are provided on both sets of first pressure plates 30. The two sets of T-shaped sliders 308 are slidably disposed in the two sets of T-shaped grooves 2021. This improves the stability of the two sets of first pressure plates 30 when sliding.

[0041] Please see Figure 3 and Figure 4 In one embodiment, two sets of second guide grooves 204 are provided opposite to each other in the temporary storage frame 20. Guide shafts 2041 are arranged parallel to each other in the two sets of second guide grooves 204. Second guide blocks 3011 are provided at both ends of the second pressure plate 301. The two sets of second guide blocks 3011 are slidably disposed in the two sets of second guide grooves 204 and sleeved on the two sets of guide shafts 2041. First springs 302 are sleeved on the two sets of guide shafts 2041. The two ends of the first springs 302 are respectively connected to the ends of the second guide grooves 204 and the side walls of the second guide blocks 3011 away from the first pressure plate 30.

[0042] By setting the second guide groove 204 to cooperate with the second guide block 3011, the stability of the second pressure plate 301 during sliding can be improved. By setting the guide shaft 2041, the extension and retraction of the first spring 302 can be guided, thereby improving the service life of the first spring 302.

[0043] Please see Figure 2 and Figure 4 In one embodiment, a guide plate 3012 is inclinedly provided at the top of the second pressure plate 301. When the added flat packaging box 1 is placed in the temporary storage frame 20, the flat packaging box 1 can squeeze the guide plate 3012 to move the second pressure plate 301 away from the first pressure plate 30, thereby facilitating the direct placement of the added flat packaging box 1 into the temporary storage frame 20.

[0044] The specific implementation method of the above-mentioned small steel cylinder packaging box forming device is as follows:

[0045] By placing the added flat packaging box 1 within the temporary storage frame 20, positioned between the second pressure plate 301 and the first pressure plate 30, the first spring 302 contracts, and the second pressure plate 301 applies pressure to the flat packaging box 1 within the temporary storage frame 20. Then, by grasping the handle 203 and driving the pull rod 303 backward, the pull rod 303 compresses the second spring 304, causing it to move. This movement of the pull rod 303 in turn moves the two sets of racks 305, which mesh with the two sets of gears 306, driving the two sets of second... When the screw 307 rotates, the two sets of second screws 307 rotate and engage with the two sets of first pressure plates 30, which can drive the two sets of first pressure plates 30 to move away from each other and open the discharge port 201. At this time, the two sets of first pressure plates 30 release the pressure on the front flat packaging box 1. At the same time, the first spring 302 extends, causing the second pressure plate 301 to move the flat packaging box 1 in the temporary storage frame 20 forward and fit against the front flat packaging box 1. At this time, the second pressure plate 301 applies pressure to the front flat packaging box 1.

[0046] Finally, the temporary storage frame 20 is moved backward. At this time, the first spring 302 continues to extend, causing the second pressure plate 301 to continuously apply pressure to the flat packaging box 1 in front. When all the flat packaging boxes 1 in the temporary storage frame 20 are moved out, the force applied to the pull rod 303 is canceled, and the reaction force of the second spring 304 causes the pull rod 303 to move in the opposite direction. The reverse movement of the pull rod 303 drives the two sets of racks 305 to move in the opposite direction and mesh with the two sets of gears 306 to drive the two sets of second screws 307 to rotate in the opposite direction. The reverse rotation of the two sets of second screws 307 and their threaded engagement with the two sets of first pressure plates 30 can drive the two sets of first pressure plates 30 to move closer to each other and reset. This allows the first pressure plate 30 to apply pressure to the flat packaging box 1 and separate the second pressure plate 301 from the flat packaging box 1, thus completing the feeding operation. During the feeding process, pressure can be continuously applied to the flat packaging box 1 in front to fix it, preventing the flat packaging box 1 in front from tilting backward during feeding, making feeding convenient.

[0047] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model, and they should all be covered within the scope of the claims and specification of this utility model.

Claims

1. A small steel cylinder packaging box forming device, comprising a box opening machine body and a packaging box storage mechanism, characterized in that, The packaging box storage mechanism includes: The guide plate (10) is inclinedly arranged on the body of the box opener, and its lower end is close to the vacuum suction cup in the body of the box opener. Two sets of baffles (101) are arranged at the lower end of the guide plate (10) along the vertical direction. A temporary storage frame (20) is slidably disposed at the top of the guide plate (10) along the inclined direction of the guide plate (10), and a connecting outlet (201) is provided on the side near the lower end of the guide plate (10); and The pressing assembly includes a first pressing plate (30), a driving assembly, a second pressing plate (301), and a first spring (302). Two sets of the first pressing plates (30) are slidably arranged on the side of the discharge port (201). The driving assembly is arranged on the temporary storage frame (20) and connected to the two sets of the first pressing plates (30). It is used to drive the two sets of the first pressing plates (30) to move away from each other to open the discharge port (201) or to move closer to each other to reset. The second pressing plate (301) is slidably arranged in the temporary storage frame (20). The first spring (302) connects the second pressing plate (301) and the temporary storage frame (20) and is used to apply a thrust to the second pressing plate (301) to move closer to the first pressing plate (30).

2. The small steel cylinder packaging box forming device according to claim 1, characterized in that, The guide plate (10) further includes an adjustment component, which includes a first screw (102). A guide rod (103) is vertically arranged on one side of the lower end of the guide plate (10), and the first screw (102) is vertically and rotatably arranged on the other side. One set of baffles (101) is fixed at the lower end of the guide plate (10), and one end of another set of baffles (101) is slidably sleeved on the guide rod (103) in the vertical direction, and the other end is threadedly connected to the first screw (102).

3. The small steel cylinder packaging box forming device according to claim 1, characterized in that, The temporary storage frame (20) is provided with first guide blocks (202) on both sides, and the guide plate (10) is provided with first guide grooves (104) on both sides. The two sets of first guide blocks (202) are slidably disposed in the two sets of first guide grooves (104) along the inclined direction of the guide plate (10).

4. The small steel cylinder packaging box forming device according to claim 1, characterized in that, The drive assembly includes a pull rod (303), a second spring (304), a rack (305), a gear (306), and a second screw (307); a handle (203) is provided on the side of the temporary storage frame (20) near the high end of the guide plate (10), the pull rod (303) is slidably disposed on the handle (203), and the second spring (304) connects the handle (203) and the pull rod (303) for applying pressure to the pull rod (303) near the high end of the guide plate (10). The thrust for moving the temporary storage frame (20) is provided with racks (305) at both ends of the pull rod (303), and gears (306) are provided on both sides of the temporary storage frame (20). The two sets of gears (306) mesh with the two sets of racks (305). The two sets of gears (306) are coaxially provided with the second screws (307). The two sets of second screws (307) have opposite spiral lines and are threadedly connected to the two sets of first pressure plates (30) respectively.

5. The small steel cylinder packaging box forming device according to claim 4, characterized in that, The handle (203) has two sets of positioning shafts (2031) arranged opposite each other at its bottom end. The pull rod (303) is slidably sleeved on the two sets of positioning shafts (2031). The second spring (304) is sleeved on both sets of positioning shafts (2031). The two ends of the second spring (304) abut against the handle (203) and the pull rod (303) respectively.

6. The small steel cylinder packaging box forming device according to claim 1, characterized in that, Two sets of T-shaped grooves (2021) are provided opposite to each other on the discharge port (201). T-shaped sliders (308) are provided on both sets of first pressure plates (30). The two sets of T-shaped sliders (308) are slidably disposed in the two sets of T-shaped grooves (2021).

7. The small steel cylinder packaging box forming device according to claim 1, characterized in that, The temporary storage frame (20) has two sets of second guide grooves (204) with opposite sides. Guide shafts (2041) are arranged parallel in both sets of second guide grooves (204). Second guide blocks (3011) are provided at both ends of the second pressure plate (301). The two sets of second guide blocks (3011) are slidably arranged in the two sets of second guide grooves (204) and sleeved on the two sets of guide shafts (2041). The first spring (302) is sleeved on both sets of guide shafts (2041). The two ends of the first spring (302) are respectively connected to the end of the second guide groove (204) and the side wall of the second guide block (3011) away from the first pressure plate (30).

8. The small steel cylinder packaging box forming device according to claim 1, characterized in that, The second pressure plate (301) has a guide plate (3012) inclined at its top.