Rotary forming device for flat paper packaging boxes

Abstract

The application discloses a rotary forming device for flat paper packaging boxes, which comprises a rotating disc, a rotating disc driving mechanism connected to the rotating disc, a paper box inner cavity forming mechanism, a lower cover plate lower folding limiting mechanism, a feeding mechanism, a lower ear bending mechanism, a material pressing mechanism, a lower cover plate upper folding mechanism, a tongue folding mechanism and a front panel folding and discharging mechanism arranged in sequence around the outer periphery of the rotating disc; the rotating disc is arranged, the paper box inner cavity forming mechanism, the lower cover plate lower folding limiting mechanism, the feeding mechanism, the lower ear bending mechanism, the material pressing mechanism, the lower cover plate upper folding mechanism, the tongue folding mechanism and the front panel folding and discharging mechanism are arranged in sequence around the outer periphery of the rotating disc, and feeding, lower ear folding, tongue folding, lower cover plate and front panel bending and other processes are sequentially completed; meanwhile, the material pressing mechanism can press the material in the paper box, prevents bulging, improves the flatness of the packaging, the rotary forming mode is high in overall forming efficiency, and the equipment performance is more stable.

Description

Technical Field

[0001] This invention belongs to the field of packaging equipment technology, specifically a rotary forming device for flat paper packaging boxes. Background Technology

[0002] Flat paper packaging boxes generally include a back panel, with an upper cover and a lower cover in the vertical direction. The upper cover has a tongue on its outer side, and the back panel has inner edges on both sides. Upper and lower ears are located at the upper and lower ends of the inner edges. The front panel is located below the lower cover, and the front panel has outer edges on both sides. Traditionally, flat paper boxes are formed using a linear sequential folding method. The drawback of this method is that each process in the box forming is relatively complicated, resulting in a long time to complete a folding action. For example, most existing equipment uses a hook-type folding mechanism when folding ears, which results in low folding efficiency. Summary of the Invention

[0003] The purpose of this invention is to provide a rotary forming device for flat paper packaging boxes to solve the problems existing in the prior art.

[0004] To solve this technical problem, the technical solution of the present invention is as follows: A rotary forming device for flat paper packaging boxes includes a rotary disk connected to a rotary disk drive mechanism, which drives the rotary disk to rotate circumferentially. Several bases are spaced apart on the rotary disk, each base used to fix a semi-formed paper box in each process. Each base includes two side baffles fixed to the rotary disk, forming a material channel that extends through the material channel from front to back. A material stop is provided at the rear end of the material channel to limit the material's front end. Around the outer periphery of the rotary disk are sequentially arranged a paper box cavity forming mechanism, a lower cover folding limiting mechanism, a feeding mechanism, a lower ear bending mechanism, a material pressing mechanism, a lower cover folding mechanism, an insert tongue folding mechanism, and a front panel folding discharge mechanism. The inner cavity forming mechanism bends the two inner sides of the rear panel and the upper cover to form an inner cavity with a bottom opening. The lower cover folding limiting mechanism bends the lower cover and the part below it downwards so that the bottom opening of the inner cavity fits the outer edge of the rotating disk, facilitating subsequent feeding. The feeding mechanism pushes the material into the inner cavity from the bottom opening. The lower ear bending mechanism bends the lower ear to close the bottom opening of the inner cavity. The material pressing mechanism flattens the material to prevent bulging material from affecting subsequent box forming. The lower cover folding mechanism bends the lower cover and the part below it upwards, preparing for the subsequent bending of the lower cover and front panel onto the inner cavity. The tongue folding mechanism bends the tongue inwards. The front panel folding discharge mechanism bends the lower cover and front panel onto the inner cavity and outputs the material from the rotating disk.

[0005] The paper box inner cavity forming mechanism has been disclosed in a previous patent, application number 2026203804313, and will not be described again here; The rotary disk drive mechanism includes a main drive motor, which is connected to a bottom drive shaft via a belt drive. The bottom drive shaft is connected to the input end of the first cam divider via a sprocket and chain drive. The first cam divider is fixed on the frame, and the first output end of the first cam divider is connected to the rotary disk via a flange drive, thereby driving the rotary disk to rotate.

[0006] Preferably, the lower cover plate folding limiting mechanism includes a first folding edge fixing retaining ring disposed along the outer edge of the rotating disk. The first folding edge fixing retaining ring has an arc-shaped structure, and its top surface is flush with the top surface of the rotating disk. A first clamping gap is formed between the first folding edge fixing retaining ring and the outer edge of the rotating disk. The outer end of the first folding edge fixing retaining ring forms an inwardly inclined slope structure, forming a bending entrance with the outer edge of the rotating disk. A stop strip is fixed on the outer surface of the outer end of the first folding edge fixing retaining ring. After the front panel is pre-pressed down by the stop strip, it enters the first clamping gap through the bending entrance, thereby bending the lower cover plate and the part below the lower cover plate downward, so that the bottom opening of the inner cavity of the paper box is fitted with the outer edge of the rotating disk, facilitating subsequent feeding. The first folding edge fixing retaining ring is fixed to the frame by several support rods.

[0007] Preferably, the feeding mechanism includes a material conveyor belt with several dividing grooves. A pushing cylinder is provided on the side of the material conveyor belt, and a pushing block is provided on the outer end of the piston rod of the pushing cylinder. A material limiting pressure plate is fixedly provided on the top of the pushing block, and the front end of the material limiting pressure plate extends beyond the front end of the pushing block. When the base rotates to the point where the material trough and the dividing groove are aligned, the pushing block pushes the material in the dividing groove into the material trough. The material limiting pressure plate can pre-press the material to prevent bulging.

[0008] Preferably, the lower ear bending mechanism includes a folding disc disposed on the edge of the rotating disk, with an arc-shaped folded portion formed on the folding disc. The rotation direction of the folding disc is opposite to that of the rotating disk. The folding disc is connected to a folding disc drive component, which drives the folding disc to rotate circumferentially. When the semi-formed cardboard box in the base of the previous process reaches the lower ear bending mechanism, a folding gap is formed between the arc-shaped folded portion and the front end face of the base. When the rotating disk rotates past the side of the folding disc, the lower ear near the side of the folding disc is bent and formed through the folding gap, and the other lower ear is bent and formed in the direction of movement of the folding disc by the folding disc.

[0009] The folding disc drive includes a spiral bevel gear commutator. The second output end of the first cam divider is connected to the input end of the spiral bevel gear commutator via a chain and sprocket drive. The first output end of the spiral bevel gear commutator is connected to the folding disc via a coupling. This drives the folding disc to rotate.

[0010] Preferably, the material pressing mechanism includes a first material pressing block and a second material pressing block disposed above the rotating disk. The first material pressing block and the second material pressing block are connected to a material pressing drive component. The material pressing drive component drives the first material pressing block and the second material pressing block to move up and down, respectively pressing the material in the semi-formed cardboard box after the lower ear bend is completed once and twice.

[0011] The first material clamping block and the second material clamping block are respectively connected to a first crossbar and a second crossbar via a first connecting rod and a second connecting rod, respectively. The material clamping drive component includes a clamping block swing rod that is driven to the second output end of the spiral bevel gear commutator. The clamping block swing rod is driven to a transmission rod head. A clamping block slide rail is fixed on the frame. A clamping block adjusting plate is connected to the clamping block slide rail via a slider. The transmission rod head is connected to the clamping block adjusting plate. A first vertical rod and a second vertical rod are fixed on the clamping block adjusting plate. The first vertical rod and the second vertical rod are respectively fixedly connected to the first crossbar and the second crossbar. The up-and-down movement of the clamping block adjusting plate drives the first material clamping block and the second material clamping block to move up and down.

[0012] Preferably, the lower cover plate folding mechanism includes a second folding edge fixing ring, which is fixed above the first folding edge fixing ring, and the rear end of the second folding edge fixing ring extends rearward to form a first wedge-shaped guide extension section. It also includes a third folding edge fixing ring disposed along the outer edge of the rotating disk, which is opposite to the second folding edge fixing ring, and a second wedge-shaped guide extension section is formed on the mating end of the third folding edge fixing ring and the second folding edge fixing ring. The first wedge-shaped guide extension section and the second wedge-shaped guide extension section are positioned vertically and vertically. The components are arranged to form an upward folding guide rail. A guide plate is also provided at the end of the second wedge-shaped guide extension, extending to the exit end of the first clamping gap, so that the lower cover plate and the portion below it enter the upward folding guide rail via the guide plate. An upward folding clamp is also included, which is fitted against the inner side of the third folding edge fixing ring, and its rear end is fixedly connected to the end of the second folding edge fixing ring. The lower cover plate and the portion below it enter the space between the upward folding guide rail and the inner side of the upward folding clamp and the third folding edge fixing ring, completing the upward fold. The second folding edge fixing ring is fixed to the frame by a support rod.

[0013] Preferably, the tongue-folding mechanism includes a tongue-folding top plate disposed above the rotating disk, and concave folding grooves formed at right angles on the rear ends of the two side baffles. The tongue-folding top plate is an arc-shaped strip. When the base rotates to below the arc-shaped strip, a tongue-folding gap is formed between the arc-shaped strip and the concave folding groove, and the tongue is folded through the tongue-folding gap. The arc-shaped strip is fixed to the second folding edge fixing ring by a support connecting rod.

[0014] Preferably, the front panel folding discharge mechanism includes a discharge channel located on the side of the rotary disk, with a first pushing groove formed on the bottom surface of the discharge channel. It also includes a discharge pushing chain with several push blocks spaced apart. Each push block includes a large-end pushing portion connected to a clamping and fixing seat via a connecting rod. The clamping and fixing seat is fixed to the discharge pushing chain. A second pushing groove is provided within the through groove, and a large through groove communicating with the front of the second pushing groove is formed. When the base rotates to align with the discharge channel... The large through slot, the second push slot, and the first push slot are connected to form a push block pushing channel. The discharge push chain is located below the push block pushing channel. It also includes an outlet pressure plate fixed above the inlet of the discharge channel. During the push, the large end push part is pushed out from the large through slot and placed in the through slot. The connecting rod is placed in the second push slot and is transported to the first push slot along with the movement of the discharge push chain. At the same time, the large end push part pushes the cardboard box in the through slot through the outlet pressure plate and bends the front panel to the top surface of the material, completing the discharge and bending of the front panel at the same time.

[0015] The frame is equipped with a first transmission rod, a second transmission rod, a third transmission rod, and a fourth transmission rod. The discharge push chain is connected to the first transmission rod, the second transmission rod, the third transmission rod, and the fourth transmission rod. The first transmission rod is connected to the output end of the second cam divider through a sprocket and chain drive. The input end of the second cam divider is connected to the top drive shaft through a sector gear drive. The top drive shaft is connected to the bottom drive shaft through a sprocket and chain drive.

[0016] The beneficial effects of the present invention, as described above, are: This application features a rotary disc, around which are sequentially arranged a carton cavity forming mechanism, a lower cover folding limiting mechanism, a feeding mechanism, a lower ear bending mechanism, a material pressing mechanism, a lower cover folding mechanism, an insert tongue folding mechanism, and a front panel folding and discharging mechanism. These mechanisms sequentially complete the processes of feeding, folding the lower ear, folding the insert tongue, and bending the lower cover and front panel. Simultaneously, the material pressing mechanism can press the material inside the carton to prevent bulging and improve the flatness of the packaging. The rotary forming method has high overall forming efficiency and more stable equipment performance. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the installation structure of the present invention; Figure 2 yes Figure 1 An enlarged structural diagram at point A; Figure 3 yes Figure 1 A magnified structural diagram at point B; Figure 4 This is a schematic diagram of the rotating disk drive mechanism of the present invention; Figure 5 yes Figure 4 A schematic diagram of the structure from another direction; Figure 6 yes Figure 5 A magnified structural diagram at point C; Figure 7 This is a schematic diagram of the folding mechanism on the lower cover plate; Figure 8 This is a partial structural diagram of the folding mechanism on the lower cover plate; Figure 9 yes Figure 1 A schematic diagram of the structure from another direction; Figure 10 yes Figure 9 A magnified structural diagram at point D; Figure 11 yes Figure 9 A magnified structural diagram at point E; Figure 12 This is a schematic diagram of the front panel folding and discharging mechanism of the present invention; Figure 13 This is a schematic diagram of the material feeding chain installation structure of the present invention; Figure 14 This is a schematic diagram of another installation structure of the material delivery chain of the present invention; Figure 15 This is the paper box forming process of the present invention.

[0018] like Figure 1-15 As shown, in order to further explain the technical solution of the present invention, the present invention will be described in detail below through specific embodiments. Example

[0019] A rotary forming device for flat paper packaging boxes includes a rotary disk 1, which is connected to a rotary disk drive mechanism that drives the rotary disk to rotate circumferentially. Several bases 2 are spaced apart on the rotary disk. The bases are used to fix the semi-formed paper boxes in each process. The bases include two side baffles 3 fixed on the rotary disk. A material groove 4 that runs through the front and back is formed between the two side baffles. A material stop block 5 is provided at the rear end of the material groove to limit the front end of the material. A paper box cavity forming mechanism 6, a lower cover plate folding limiting mechanism 7, a feeding mechanism 8, a lower ear bending mechanism 9, a material pressing mechanism 10, a lower cover plate folding mechanism 11, an insert tongue folding mechanism 12, and a front panel folding and discharging mechanism 13 are arranged sequentially around the outer periphery of the rotary disk. The inner cavity forming mechanism bends the two inner sides of the rear panel and the upper cover to form an inner cavity with a bottom opening. The lower cover folding limiting mechanism bends the lower cover and the part below it downwards so that the bottom opening of the inner cavity fits the outer edge of the rotating disk, facilitating subsequent feeding. The feeding mechanism pushes the material into the inner cavity from the bottom opening. The lower ear bending mechanism bends the lower ear to close the bottom opening of the inner cavity. The material pressing mechanism flattens the material to prevent bulging material from affecting subsequent box forming. The lower cover folding mechanism bends the lower cover and the part below it upwards, preparing for the subsequent bending of the lower cover and front panel onto the inner cavity. The tongue folding mechanism bends the tongue inwards. The front panel folding discharge mechanism bends the lower cover and front panel onto the inner cavity and outputs the material from the rotating disk.

[0020] The paper box cavity forming mechanism has been disclosed in previous patents and will not be described in detail here. The rotary disk drive mechanism includes a main drive motor 14, which is connected to a bottom drive shaft 15 via a belt drive. The bottom drive shaft is connected to the input end of a first cam divider 16 via a sprocket and chain drive. The first cam divider is fixed on the frame 18. The first output end of the first cam divider is connected to the rotary disk 1 via a flange 19, which drives the rotary disk to rotate.

[0021] The lower cover plate folding limiting mechanism includes a first folding edge fixing retaining ring 20 arranged along the outer edge of the rotating disk. The first folding edge fixing retaining ring has an arc-shaped structure, and its top surface is flush with the top surface of the rotating disk. A first clamping gap 21 is formed between the first folding edge fixing retaining ring and the outer edge of the rotating disk. The outer end of the first folding edge fixing retaining ring forms an inwardly inclined slope structure 22, which forms a bending entrance 23 with the outer edge of the rotating disk. A stop strip 24 is fixed on the outer side of the outer end of the first folding edge fixing retaining ring. After the front panel is pre-pressed down by the stop strip, it enters the first clamping gap through the bending entrance, thereby bending the lower cover plate and the part below the lower cover plate downward, so that the bottom opening of the inner cavity of the paper box fits the outer edge of the rotating disk, facilitating subsequent feeding. The first folding edge fixing retaining ring is fixed to the frame by several support rods 25.

[0022] The feeding mechanism includes a material conveyor belt 26 with several dividing grooves 27 formed on it. A pushing cylinder 28 is installed on the side of the material conveyor belt, and a pushing block 29 is installed on the outer end of the piston rod of the pushing cylinder. A material limiting pressure plate 30 is fixedly installed on the top of the pushing block, and the front end of the material limiting pressure plate extends beyond the front end of the pushing block. When the base rotates to the point where the material trough and the dividing groove are aligned, the pushing block pushes the material in the dividing groove into the material trough. The material limiting pressure plate can pre-press the material to prevent bulging.

[0023] The lower ear bending mechanism includes a folding disc 31 disposed on the edge of the rotating disc, with an arc-shaped folding part 32 formed on the folding disc. The rotation direction of the folding disc is opposite to that of the rotating disc. The folding disc is connected to a folding disc drive component, which drives the folding disc to rotate circumferentially. When the semi-formed cardboard box in the base of the previous process reaches the lower ear bending mechanism, a folding gap is formed between the arc-shaped folding part and the front end face of the base. When the rotating disc rotates past the side of the folding disc, the lower ear close to the side of the folding disc is bent and formed through the folding gap, and the other lower ear is bent and formed in the direction of movement of the folding disc by the folding disc.

[0024] The folding disc drive includes a spiral bevel gear commutator 33. The second output end 34 of the first cam divider is connected to the input end 35 of the spiral bevel gear commutator via a chain and sprocket drive. The first output end 36 of the spiral bevel gear commutator is connected to the folding disc via a coupling 37, which drives the folding disc to rotate.

[0025] The material pressing mechanism includes a first material pressing block 38 and a second material pressing block 39 disposed above the rotating disk. The first material pressing block and the second material pressing block are connected to a material pressing drive component. The material pressing drive component drives the first material pressing block and the second material pressing block to move up and down, respectively pressing the material in the semi-formed cardboard box after the lower ear bend is completed once and pressing it twice.

[0026] The first material clamping block and the second material clamping block are respectively connected to the first crossbar 42 and the second crossbar 43 via the first connecting rod 40 and the second connecting rod 41. The material clamping drive includes a clamping block swing rod 44 that is driven to the second output end of the spiral bevel gear commutator. The clamping block swing rod is driven to the transmission rod head 45. A clamping block slide rail 46 is fixed on the frame. A clamping block adjusting plate 47 is connected to the clamping block slide rail via a slider. The transmission rod head is connected to the clamping block adjusting plate. A first vertical rod 48 and a second vertical rod 49 are fixed on the clamping block adjusting plate. The first vertical rod and the second vertical rod are respectively fixedly connected to the first crossbar and the second crossbar. The up and down movement of the clamping block adjusting plate drives the first material clamping block and the second material clamping block to move up and down.

[0027] The lower cover plate folding mechanism includes a second folding edge fixing retaining ring 50, which is fixed above the first folding edge fixing retaining ring. The rear end of the second folding edge fixing retaining ring extends rearward to form a first wedge-shaped guide extension section 51. It also includes a third folding edge fixing retaining ring 52 disposed along the outer edge of the rotating disk. The third folding edge fixing retaining ring is disposed opposite to the second folding edge fixing retaining ring, and a second wedge-shaped guide extension section 53 is formed on the mating end of the third folding edge fixing retaining ring and the second folding edge fixing retaining ring. The first wedge-shaped guide extension section and the second wedge-shaped guide extension section are arranged vertically. The system includes an upward folding guide rail 54; a guide plate 55 is also provided at the end of the second wedge-shaped guide extension section, extending to the outlet end of the first clamping gap, so that the lower cover plate of the carton and the part below the lower cover plate enter the upward folding guide rail through the guide plate; it also includes an upward folding clamping plate 56, which is disposed against the inner side of the third folding edge fixing retaining ring, and its rear end is fixedly connected to the end of the second folding edge fixing retaining ring; the lower cover plate of the carton and the part below the lower cover plate enter between the upper folding clamping plate and the inner side of the third folding edge fixing retaining ring through the upward folding guide rail, completing the upward fold. The second folding edge fixing retaining ring is fixed to the frame by a support rod.

[0028] The tongue-folding mechanism includes a tongue-folding top plate 57 disposed above the rotating disk. The rear ends of the two side baffles have concave folding grooves 58 set at right angles. The tongue-folding top plate is an arc-shaped strip. When the base rotates to below the arc-shaped strip, a tongue-folding gap is formed between the arc-shaped strip and the concave folding groove, and the tongue folding is completed through this gap. The arc-shaped strip is fixed to the second folding edge fixing ring by a support connecting rod 59.

[0029] The front panel folding discharge mechanism includes a discharge channel 60 located on the side of the rotating disk, with a first pushing groove 61 formed on the bottom surface of the discharge channel. It also includes a discharge pushing chain 62, with several pushing blocks 63 spaced apart on the chain. Each pushing block includes a large-end pushing part 64, which is connected to a clamping and fixing seat 66 via a connecting rod 65. The clamping and fixing seat is fixed to the discharge pushing chain. A second pushing groove 67 is provided within the through groove, and a large through groove 68 communicating with the second pushing groove is opened at the front of the second pushing groove. When the base rotates to the position of the discharge... When the channels are connected, the large through slot, the second push slot and the first push slot are connected to form a push block pushing channel. The discharge push chain is located below the push block pushing channel. It also includes an outlet pressure plate 69 fixed above the inlet of the discharge channel. During the push, the large end push part is pushed out from the large through slot and placed in the through slot. The connecting rod is placed in the second push slot and is transported to the first push slot along with the movement of the discharge push chain. At the same time, the large end push part pushes the cardboard box in the through slot through the outlet pressure plate and bends the front panel to the top surface of the material, completing the discharge and bending of the front panel at the same time.

[0030] The frame is equipped with a first transmission rod 70, a second transmission rod 71, a third transmission rod 72, and a fourth transmission rod 76. The discharge push chain is connected to the first transmission rod, the second transmission rod, the third transmission rod, and the fourth transmission rod. The first transmission rod is connected to the output end 72 of the second cam divider 71 via a sprocket and chain drive. The input end 73 of the second cam divider is connected to the top drive shaft 74 via a sector gear drive. The top drive shaft is connected to the bottom drive shaft 15 via a sprocket and chain drive.

[0031] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A rotary forming device for flat paper packaging boxes, characterized in that: The device includes a rotating disk connected to a rotating disk drive mechanism, which drives the rotating disk to rotate circumferentially. Several bases are spaced apart on the rotating disk, and the bases are used to fix the semi-formed paper boxes in each process. Each base includes two side baffles fixed on the rotating disk, and a material channel that runs through the front and back is formed between the two side baffles. A material stop is provided at the rear end of the material channel to limit the front end of the material. A paper box cavity forming mechanism, a lower cover plate folding limiting mechanism, a feeding mechanism, a lower ear bending mechanism, a material pressing mechanism, a lower cover plate folding mechanism, an insert tongue folding mechanism, and a front panel folding discharge mechanism are arranged sequentially around the outer periphery of the rotating disk. The inner cavity forming mechanism bends the two inner sides of the rear panel and the upper cover to form an inner cavity with a bottom opening. The lower cover folding limiting mechanism bends the lower cover and the part below it downwards so that the bottom opening of the inner cavity fits the outer edge of the rotating disk, facilitating subsequent feeding. The feeding mechanism pushes the material into the inner cavity from the bottom opening. The lower ear bending mechanism bends the lower ear to close the bottom opening of the inner cavity. The material pressing mechanism flattens the material to prevent bulging material from affecting subsequent box forming. The lower cover folding mechanism bends the lower cover and the part below it upwards, preparing for the subsequent bending of the lower cover and front panel onto the inner cavity. The tongue folding mechanism bends the tongue inwards. The front panel folding discharge mechanism bends the lower cover and front panel onto the inner cavity and outputs the material from the rotating disk.

2. The rotary forming device for flat paper packaging boxes according to claim 1, characterized in that: The lower cover plate folding limiting mechanism includes a first folding edge fixing retaining ring arranged along the outer edge of the rotating disk. The first folding edge fixing retaining ring has an arc-shaped structure, and its top surface is flush with the top surface of the rotating disk. A first clamping gap is formed between the first folding edge fixing retaining ring and the outer edge of the rotating disk. The outer end of the first folding edge fixing retaining ring forms an inwardly sloping structure, forming a bending entrance with the outer edge of the rotating disk. A stop strip is fixed on the outer side of the outer end of the first folding edge fixing retaining ring. After the front panel is pre-pressed down by the stop strip, it enters the first clamping gap through the bending entrance, thereby bending the lower cover plate and the part below the lower cover plate downward, so that the bottom opening of the inner cavity of the paper box fits against the outer edge of the rotating disk, facilitating subsequent feeding. The first folding edge fixing retaining ring is fixed to the frame by several support rods.

3. The rotary forming device for flat paper packaging boxes according to claim 1, characterized in that: The feeding mechanism includes a material conveyor belt with several dividing grooves. A pushing cylinder is installed on the side of the material conveyor belt, and a pushing block is installed on the outer end of the piston rod of the pushing cylinder. A material limiting pressure plate is fixedly installed on the top of the pushing block, and the front end of the material limiting pressure plate extends beyond the front end of the pushing block. When the base rotates to the point where the material trough and the dividing groove are aligned, the pushing block pushes the material in the dividing groove into the material trough. The material limiting pressure plate can pre-press the material to prevent bulging.

4. The rotary forming device for flat paper packaging boxes according to claim 1, characterized in that: The lower ear bending mechanism includes a folding disc disposed on the edge of a rotating disk. An arc-shaped folding part is formed on the folding disc. The rotation direction of the folding disc is opposite to that of the rotating disk. The folding disc is connected to a folding disc drive component, which drives the folding disc to rotate circumferentially. When the semi-formed cardboard box in the base of the previous process reaches the lower ear bending mechanism, a folding gap is formed between the arc-shaped folding part and the front end face of the base. When the rotating disk rotates past the side of the folding disc, the lower ear close to the side of the folding disc is bent and formed through the folding gap. The other lower ear is driven by the folding disc and bent and formed in the direction of movement of the folding disc.

5. The rotary forming device for flat paper packaging boxes according to claim 1, characterized in that: The material pressing mechanism includes a first material pressing block and a second material pressing block disposed above the rotating disk. The first material pressing block and the second material pressing block are connected to a material pressing drive component. The material pressing drive component drives the first material pressing block and the second material pressing block to move up and down, respectively pressing the material in the semi-formed cardboard box after the lower ear bend is completed.

6. The rotary forming device for flat paper packaging boxes according to claim 1, characterized in that: The lower cover plate folding mechanism includes a second folding edge fixing ring, which is fixed above the first folding edge fixing ring. The rear end of the second folding edge fixing ring extends rearward to form a first wedge-shaped guide extension section. It also includes a third folding edge fixing ring disposed along the outer edge of the rotating disk. The third folding edge fixing ring is disposed opposite to the second folding edge fixing ring, and a second wedge-shaped guide extension section is formed on the mating end of the third folding edge fixing ring and the second folding edge fixing ring. The first wedge-shaped guide extension section and the second wedge-shaped guide extension section are arranged vertically. A folding guide rail is formed; a guide plate is also provided at the end of the second wedge-shaped guide extension section, extending to the exit end of the first clamping gap, so that the lower cover plate of the carton and the part below the lower cover plate enter the folding guide rail through the guide plate. It also includes an folding clamp plate, which is fitted against the inner side of the third folding edge fixing retaining ring, and its rear end is fixedly connected to the end of the second folding edge fixing retaining ring. The lower cover plate of the carton and the part below the lower cover plate enter between the upper folding clamp plate and the inner side of the third folding edge fixing retaining ring through the folding guide rail, completing the folding. The second folding edge fixing retaining ring is fixed to the frame by a support rod.

7. The rotary forming device for flat paper packaging boxes according to claim 1, characterized in that: The tongue-folding mechanism includes a tongue-folding top plate positioned above the rotating disk. The rear ends of the two side baffles have concave folding grooves set at right angles. The tongue-folding top plate is an arc-shaped strip. When the base rotates to a position below the arc-shaped strip, a tongue-folding gap is formed between the arc-shaped strip and the concave folding groove, allowing the tongue to fold. The arc-shaped strip is fixed to the second folding edge fixing ring by a supporting connecting rod.

8. The rotary forming device for flat paper packaging boxes according to claim 1, characterized in that: The front panel folding and discharging mechanism includes a discharging channel located on the side of the rotating disk, with a first pushing groove formed on the bottom surface of the discharging channel. It also includes a discharging pushing chain with several pushing blocks spaced apart. Each pushing block includes a large-end pushing part connected to a clamping and fixing seat via a connecting rod. The clamping and fixing seat is fixed to the discharging pushing chain. A second pushing groove is provided within the through groove, and a large through groove communicating with the front of the second pushing groove is formed. When the base rotates to align with the discharging channel, the large through groove... The first push slot, the second push slot, and the first push slot are connected to form a push block pushing channel. The discharge push chain is located below the push block pushing channel. It also includes an outlet pressure plate fixed above the inlet of the discharge channel. During the push, the large end push part is pushed out from the large slot and placed in the through slot. The connecting rod is placed in the second push slot and is transported to the first push slot along with the movement of the discharge push chain. At the same time, the large end push part pushes the cardboard box in the through slot through the outlet pressure plate and bends the front panel to the top surface of the material, completing the discharge and bending of the front panel at the same time.

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