Carton folding and hemming machine

Abstract

The present application relates to a kind of carton folding hem one-time forming machine, including rack, forming die, material placing mechanism, feeding plate and pushing mechanism, the rear of rack is equipped with material placing station, the front of rack is equipped with forming station, and forming die is arranged on forming station;Forming die includes upper die and lower die, and the die closing drive mechanism capable of driving upper die, lower die is opened and closed action;Rack is equipped with the feeding switching mechanism capable of driving feeding plate between material placing station and forming station Switching position.This application realizes high-speed, accurate paperboard conveying by the cooperation between feeding switching mechanism, feeding plate and pushing mechanism, and automatically pushes out the carton that has been formed, simple structure, easy to operate, can be automatically fed to position and simultaneously push out the carton that has been formed, improve the production efficiency of carton;And can be folded and hemmed by forming die one-time to carton, one-time forming, save time and effort, greatly improve the folding hem efficiency of carton.

Description

Technical Field

[0001] This invention relates to a paper box forming machine, and more particularly to a one-time forming machine for folding and rolling edges of paper boxes. Background Technology

[0002] Paper packaging boxes are containers used to hold goods. Currently, paper packaging boxes are generally made by automatic folding. For example, an automatic paper box packaging machine disclosed in authorization announcement number CN203485497U and authorization announcement date March 19, 2014 includes a machine casing (21), a feeding mechanism (5), a paper feeding mechanism (6), an edge rolling mechanism (12), a transfer mechanism (13), a glue spraying mechanism (15), and a forming and positioning mechanism (17) arranged sequentially from left to right on the upper part of the machine casing, a box punching mechanism (16) arranged above the forming mechanism, a power mechanism (20) arranged below the machine casing, and a separately arranged discharge machine; the paper feeding mechanism includes a belt conveyor mechanism (6), a guide plate mechanism (9), a paper separating mechanism (10), and a paper pressing mechanism (11); one end of the belt conveyor mechanism is close to the lower end of the hopper, and the other end is connected to the edge rolling mechanism; the paper separating mechanism and the paper pressing mechanism are both arranged above the belt conveyor mechanism; the box punching mechanism (16) includes a punching hammer mechanism (16-5) and a box removal mechanism (16-6) arranged at the bottom of the punching hammer mechanism, and the discharge machine is arranged below the forming and positioning mechanism. During operation, the paperboard is fed to the edge-rolling mechanism via the paper feeding mechanism, where glue is automatically applied to the edge. It is then moved to the forming and positioning mechanism, where the punch mechanism quickly presses it down and inserts the paperboard into the forming and positioning mechanism. After the paper box is formed, the pressure holding mechanism presses the paper box, and after pressure holding, the punch exits the forming and positioning mechanism. Finally, the paper box is pushed out by the ejector mechanism and falls into the discharge machine, where the paper box is then conveyed out.

[0003] Although this type of automatic cardboard packaging machine can automatically transport cardboard through the paper feeding mechanism, it still requires a rolling edge mechanism to apply glue to the rolled edge, a transfer mechanism to move the cardboard to the glue spraying mechanism for glue spraying or dotting, and then it can be transported to the forming and positioning mechanism for forming into a cardboard box. Finally, the punching mechanism and the box ejection mechanism need to work together to push the finished cardboard box out of the forming and positioning mechanism. It can be seen that the feeding, rolling, forming, and unloading processes of this type of automatic cardboard packaging machine are too cumbersome. The formed cardboard box requires the cooperation of multiple mechanisms to be unloaded, resulting in low cardboard box production efficiency. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a paper box folding and edge-rolling one-time forming machine. This paper box folding and edge-rolling one-time forming machine is simple to operate, can automatically feed materials and perform folding and edge-rolling operations in one go, and simultaneously eject the formed paper box, thereby improving the production efficiency of paper boxes.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is as follows: A one-time forming machine for folding and rolling edges of paper boxes includes a frame and a forming mold. A feeding station is located at the rear of the frame, and a forming station is located at the front of the frame. The forming mold is positioned at the forming station. The forming mold includes an upper mold and a lower mold, and a mold closing drive mechanism capable of driving the upper and lower molds to open and close. The mold closing drive mechanism is mounted on the frame. The upper mold includes an upper mold base, an upper mold body, and a forming head. The upper mold body is mounted on the upper mold base and contains an upper heating pipe. The lower mold includes a lower mold base, a lower mold body, and a base support. The lower mold body is mounted on the lower mold base and contains a lower heating pipe. The machine is characterized by further including... The machine includes a feeding mechanism, a feeding plate, and a pushing mechanism. The feeding mechanism is mounted on the frame and corresponds to the feeding station. The feeding plate is movably mounted on the frame. The frame is equipped with a feeding switching mechanism that can drive the feeding plate to switch positions between the feeding station and the forming station. The pushing mechanism is installed at the front end of the feeding plate. When the feeding plate moves to the forming station, it is positioned between the forming head and the base. The lower part of the upper mold body has a downward-facing upper mold cavity. The forming head is mounted in the upper mold cavity via a first elastic element. The depth of the upper mold cavity is the same as the upper height of the forming head. The upper surface of the lower mold body has an upward-facing... The first protruding boss has an upward-opening molding cavity inside. The lower mold body has a lower mold cavity located below and communicating with the molding cavity. The lower part of the molding head matches the molding cavity. The base is installed in the lower mold cavity via a second elastic element. The lower mold also includes a rolled edge plate with a guide hole at its center corresponding to the first boss. The rolled edge plate is fitted onto the first boss through the guide hole and is installed on the lower mold body via a third elastic element. The height of the rolled edge plate is greater than the height of the first boss. The upper part of the molding head matches the guide hole. The upper opening edge of the hole is provided with an upward-facing lower annular curling groove, and the lower opening edge of the upper mold cavity is provided with an upward-facing upper annular curling groove. The upper annular curling groove and the lower annular curling groove are correspondingly matched. When the upper mold and the lower mold are in the mold-opening state, the upper surface of the base is higher than the upper surface of the curling plate, and the upper surface of the curling plate is higher than the upper opening edge of the forming cavity. When the upper mold and the lower mold are in the mold-closing process, there is an annular gap between the upper part of the forming head and the inner wall of the guide hole, which allows the cardboard to pass through. The lower end face of the upper mold body is in contact with the upper surface of the curling plate, and the annular gap is connected to the upper annular curling groove.

[0006] The forming head is mounted in the upper mold cavity via a first elastic element, connecting the forming head to the upper mold cavity and allowing it to extend and retract vertically within the upper mold cavity. The bottom support is mounted in the lower mold cavity via a second elastic element, connecting the bottom support to the lower mold cavity and allowing it to extend and retract vertically within both the lower mold cavity and the forming cavity. The rolled edge plate is mounted on the lower mold body via a third elastic element, connecting the rolled edge plate to the lower mold body and allowing it to extend and retract vertically along the outer wall of the first boss.

[0007] During operation, a stack of pre-cut cardboard (with waterproof adhesive layers on both the inner and outer surfaces) is first placed onto the feeding mechanism. The feeding switching mechanism then moves the feeding plate to the feeding station. The upper mold is heated by the upper heating element, and the lower mold by the lower heating element. Next, the feeding mechanism places a piece of cardboard onto the feeding plate, while the previously formed carton remains on the base. The feeding switching mechanism then moves the feeding plate towards the forming station. A pushing mechanism at the front of the feeding plate pushes the previously formed carton forward, allowing it to move from the base to the external delivery conveyor belt for transport. Simultaneously, the cardboard on the feeding plate is quickly delivered between the forming head and the base. Finally, the mold is closed. The drive mechanism drives the upper mold to press down, causing the lower surface of the forming head to descend until it contacts the upper surface of the base, gradually clamping the paper. The upper mold continues to move downwards, causing the base to retract into the forming cavity. This brings the four sides of the cardboard into contact with the upper surface of the crimping plate (i.e., the upper opening edge of the guide hole). The four sides of the cardboard then fold inwards to form a semi-finished cardboard box. At this point, the lower part of the forming head is not yet in the forming cavity, and the lower end face of the upper mold has not yet contacted the upper surface of the crimping plate. The opening edge of the semi-finished cardboard box will naturally move towards the outer wall of the forming head and insert into the upper annular crimping groove. Then, the upper mold continues to move downwards until the forming head completely presses the base back into the lower mold cavity, at which point the lower part of the forming head is in the forming cavity. With the lower mold cavity blocking the bottom support, it can no longer move downwards within the lower mold cavity, and the forming head can no longer move downwards within the forming cavity. This causes the upper surface of the bottom support and the inner wall of the forming cavity to form a box-like structure. The semi-finished cardboard box is completely held tightly by the forming head and the bottom support within the box-like structure. Under the heating of the upper and lower mold bodies, the four corners of the semi-finished cardboard box are thermoformed by sticking together. At this time, the upper part of the four sides of the semi-finished cardboard box is in the annular gap, and the lower end face of the upper mold body begins to contact the upper surface of the edge-rolling plate. The lower annular edge-rolling groove of the edge-rolling plate and the upper annular edge-rolling groove of the upper mold body correspond to each other to form an annular edge-rolling groove with an opening facing downwards. Then, because the height of the edge-rolling plate is greater than the height of the first boss, the annular gap and the annular edge-rolling groove are connected. Since the semi-finished cardboard box, which is completely clamped, has no downward movement space in the forming cavity, the upper mold body continues to move downward under the action of the first elastic element, causing the edge-rolling plate to move downward along the outer wall of the first boss. The length of the four sides of the semi-finished cardboard box in the annular gap gradually shortens, and the opening edge of the semi-finished cardboard box gradually inserts upward into the annular edge-rolling groove under the guidance of the annular edge-rolling groove, so that the opening edge of the semi-finished cardboard box gradually bends outward to perform the edge-rolling operation. Finally, the upper mold is driven to rise upward by the mold closing drive mechanism, so that the edge-rolled cardboard box is demolded to obtain the finished cardboard box. At this time, the feeding switching mechanism drives the feeding plate to quickly return to the unloading station to pick up the next cardboard, waiting for it to be continuously conveyed to the forming station.

[0008] In a preferred embodiment, the feeding plate is provided with positioning through holes capable of accommodating cardboard. By placing the cardboard into the positioning through holes, the cardboard can be fixed in a specific position without shifting or moving.

[0009] In a further preferred embodiment, the feeding plate is a U-shaped plate with its opening facing forward. The positioning through hole is located in the opening of the U-shaped plate. The pushing mechanism includes two pushing units, both mounted on the U-shaped plate and positioned on opposite sides of the opening. The U-shape of the feeding plate allows it to retract backward through the U-shaped notch after the bottom support lifts the cardboard, preventing it from being jammed by the second elastic element below the bottom support.

[0010] In a further preferred embodiment, the pushing unit includes a pushing mounting base and an elastic strip. The pushing mounting base is mounted on the U-shaped plate, one end of the elastic strip is mounted on the pushing mounting base, and the other end of the elastic strip gradually slopes outward from the opening of the U-shaped plate from back to front. The moving elastic strip pushes the formed cardboard box on the lower mold forward, achieving a smooth pushing process. Because the elastic strip is flexible, it can prevent the cardboard box from being impacted or damaged. Furthermore, because the elastic strip has a certain degree of elasticity, it can automatically return to its initial state after pushing is completed, preparing for the next pushing operation, thus improving production efficiency.

[0011] In a further preferred embodiment, a first mounting plate and a second mounting plate are sequentially arranged from bottom to top on the feeding station. The first mounting plate is suspended on the frame, and the second mounting plate is suspended on the first mounting plate. The feeding mechanism is located on the second mounting plate, the feeding switching mechanism is mounted on the first mounting plate, and the feeding plate is movably mounted on the first mounting plate. This suspended mounting method maximizes the use of the space between the frame, the first mounting plate, and the second mounting plate, making the entire equipment structure more compact, occupying less space, and improving space utilization. Furthermore, suspending the second mounting plate on the first mounting plate and placing the feeding mechanism on the second mounting plate reduces interference from the feeding mechanism on the movement of the feeding plate during feeding, improving the stability of the feeding plate's movement.

[0012] In a further preferred embodiment, the feeding mechanism includes a feeding rack and an adsorption mechanism. The feeding rack is mounted on the second mounting plate and has a feeding channel that runs vertically through it. The second mounting plate has a second discharge port, and the first mounting plate has a first discharge port. The feeding channel, the second discharge port, and the first discharge port are connected sequentially from top to bottom. The adsorption mechanism is located below the first discharge port, with its adsorption end facing upwards. The feeding station is equipped with a first driving mechanism that can drive the adsorption mechanism to move up and down between the first discharge port and the second discharge port. When the feeding plate is in the feeding station, the positioning through hole is located above the first discharge port and corresponds to the first discharge port. First, the entire stack of cut cardboard is placed into the feeding channel of the feeding rack, and the feeding switching mechanism drives the feeding plate to move directly above the first feeding port. Then, the first driving mechanism drives the suction mechanism to rise, so that the suction end of the suction mechanism passes through the first feeding port, the positioning through hole, and the second feeding port from bottom to top. The suction end of the suction mechanism sucks down the cardboard at the bottom of the feeding channel through the second feeding port. Next, the suction-held cardboard is quickly placed into the positioning through hole on the feeding plate, and the negative pressure on the suction end of the suction mechanism is released, releasing the suction on the cardboard. Typically, the first driving mechanism can be a cylinder, a hydraulic cylinder, or a structure combining a motor and a transmission linkage.

[0013] In a further preferred embodiment, the adsorption mechanism includes an adsorption seat, at least three positioning posts, and at least three vacuum suction heads. The number of positioning posts and vacuum suction heads are the same and correspond one-to-one. The power output direction of the first driving mechanism is upward, the adsorption seat is installed on the power output end of the first driving mechanism, each positioning post is vertically installed on the adsorption seat, and each vacuum suction head is installed on the upper end of the corresponding positioning post, with the adsorption direction of the vacuum suction head upward. Typically, each vacuum suction head is connected to an external vacuum pump. During operation, the external vacuum pump is started to evacuate the vacuum suction heads, creating a negative pressure zone at the adsorption end of each vacuum suction head. The first driving mechanism drives the adsorption seat upward, causing each positioning post and its vacuum suction head to move upward until the adsorption end of each vacuum suction head adsorbs the cardboard at the bottom of the feeding channel. Then, the first driving mechanism drives the adsorption seat downward, causing each positioning post and its vacuum suction head to move downward, quickly placing the adsorbed cardboard into the positioning through-hole on the feeding plate.

[0014] In a further preferred embodiment, the feeding switching mechanism includes a feeding drive unit, two guide rails, and two guide bars. The feeding drive unit is mounted on the first mounting plate, the two guide rails are mounted on the first mounting plate in a front-to-back orientation, and the first discharge port is located between the two guide rails. The two guide bars are respectively mounted in their respective guide rails and can move back and forth within the guide rails. The feeding plate is mounted on the two guide bars, and the power output end of the feeding drive unit is connected to one of the guide bars. The feeding drive unit drives the guide bars to move back and forth within the guide rails, thereby causing the feeding plate to move back and forth between the feeding station and the forming station. Typically, the feeding drive unit can adopt a structure consisting of a drive motor, a drive wheel, a driven wheel, and a synchronous belt. Both the drive wheel and the driven wheel can be rotatably mounted on the first mounting plate. The synchronous belt is tensioned outside the drive wheel and the driven wheel and is connected to one of the guide bars. The drive motor drives the drive wheel to rotate, which in turn drives the driven wheel and the synchronous belt to transmit power, thereby causing the guide bar to move back and forth within the guide rails.

[0015] In a preferred embodiment, the elastic force of the first elastic element is greater than that of the second elastic element, and the elastic force of the third elastic element is greater than that of the second elastic element. Designing the elastic forces of the first and third elastic elements to be relatively large provides sufficient pressure and support, ensuring stable positioning and fixation of the forming head, base, and edge-rolling plate, guaranteeing the stability of the mold during operation and forming. It also allows for a certain pressure fit with the forming head, edge-rolling plate, and other components, providing appropriate pressure and deformation to the semi-finished cardboard box during edge-rolling, thereby achieving accurate edge-rolling and ensuring proper support and positioning of the semi-finished cardboard box during forming. Typically, the elastic force of the first elastic element is greater than that of the third elastic element.

[0016] In a preferred embodiment, the first elastic element includes a first guide rod, a first compression spring, and a first limiting block. The upper mold body has a first guide hole communicating with the upper mold cavity. The first guide rod passes through the first guide hole, and its lower end connects to the upper surface of the forming head. The first limiting block is installed on the upper end of the first guide rod and engages with the upper opening edge of the first guide hole. The first compression spring is fitted onto the first guide rod, with its upper end contacting the bottom of the upper mold cavity and its lower end contacting the upper surface of the forming head. When the upper and lower molds are in the closed state, neither the forming head nor the base can move downwards. At this time, the upper mold body continues to move downwards along the forming head, compressing the first compression spring and causing the lower end of the upper mold body to move downwards and contact the upper surface of the rolled edge plate. When the upper and lower molds are in the open state, the first compression spring returns to its original length, allowing the upper mold body to move upward along the first guide rod. However, the first limiting block restricts the first compression spring from further lengthening, preventing the upper mold body from moving upward further. In a more preferred embodiment, the first guide hole is a countersunk hole.

[0017] In a further preferred embodiment, the third elastic element includes a first cylinder, a third guide rod, a third limiting block, and a third compression spring. The interior of the rolled edge plate is provided with a third guide hole that runs vertically through it. The lower mold body is provided with a fourth guide hole corresponding to the third guide hole. The first cylinder is mounted on the lower mold base, with the piston rod of the first cylinder extending upwards. The third guide rod is located in both the fourth and third guide holes. The third limiting block is mounted on the upper end of the third guide rod and engages with the upper opening edge of the third guide hole. The lower end of the third guide rod is connected to the end of the piston rod of the first cylinder. The third compression spring is fitted onto the third guide rod, with its upper end contacting the lower surface of the rolled edge plate and its lower end contacting the upper surface of the lower mold body. After the edge curling is completed, the upper mold is lifted upward by the mold closing drive mechanism. Since the forming head will continue to be pulled downward under the reset action of the first compression spring, if the roll plate moves upward at this time due to its ability to extend and retract, the curled edge of the semi-finished carton opening will loosen. At this time, the first cylinder of the lower mold body retracts, pulling the third guide rod, so that the third compression spring on the third guide rod does not rebound and reset temporarily, thus pulling the edge curling plate to prevent it from moving upward. When the upper mold is fully opened, the bottom support extends upward under the reset action of the second elastic element and is above the forming cavity, so that the finished carton is pushed upward. After the finished carton is pushed out, the first cylinder of the lower mold body extends, releasing the third guide rod and the edge curling plate connected to it, allowing the edge curling plate to return to its original position under the reset action of the third compression spring.

[0018] In another preferred embodiment, a second cylinder is provided inside the upper mold body. The piston rod of the second cylinder extends downwards. A fifth guide hole communicating with the upper mold cavity is provided inside the upper mold body. The piston rod of the second cylinder passes through the fifth guide hole, with its end positioned within the upper mold cavity. The upper surface of the forming head is connected to the end of the piston rod of the second cylinder. The forming head has an air passage connected to an external adsorption device inside, and multiple suction holes communicating with the air passage are provided on the lower surface of the forming head. This configuration allows the forming head to extend and retract vertically within the upper mold cavity. When the upper and lower molds open, the external adsorption device is activated to evacuate the air passage of the forming head, creating a negative pressure zone at each suction hole. The forming head then adsorbs the already rolled cardboard box. The second cylinder then retracts upwards, causing the forming head and the adsorbed cardboard box to move upwards, preventing the rolled edge of the semi-finished cardboard box from loosening due to upward movement of the roll plate.

[0019] In a further preferred embodiment, the third elastic element includes a third guide rod, a third limiting block, and a third compression spring. The rolled edge plate has a through-hole, with the third guide rod positioned within it. The third limiting block is mounted on the upper end of the third guide rod and engages with the upper opening edge of the third guide hole. The lower end of the third guide rod connects to the upper surface of the lower mold body. The third compression spring is fitted onto the third guide rod, with its upper end contacting the lower surface of the rolled edge plate and its lower end contacting the upper surface of the lower mold body. When the upper and lower molds are in the closed state, neither the forming head nor the base can move downwards. At this time, the upper mold body continues to move downwards along the forming head, compressing the third compression spring and causing the rolled edge plate to move downwards along the outer wall of the first boss. When the upper and lower molds are in the open state, the third compression spring returns to its original length, allowing the rolled edge plate to move upwards along the outer wall of the first boss. However, the limiting action of the third limiting block prevents the third compression spring from further lengthening, thus preventing the rolled edge plate from moving upwards. In a better embodiment, the third guide hole is a countersunk hole.

[0020] In a preferred embodiment, the second elastic element includes a second guide rod, a second compression spring, and a second limiting block. The lower mold body has a second guide hole communicating with the lower mold cavity. The second guide rod passes through the second guide hole, and its upper end connects to the lower surface of the base. The second limiting block is installed at the lower end of the second guide rod, and it engages with the lower opening edge of the second guide hole. The second compression spring is fitted onto the second guide rod, with its upper end contacting the upper surface of the base and its lower end contacting the bottom of the lower mold cavity. During the mold closing process between the upper and lower molds, when neither the forming head nor the base can move downwards, the second compression spring is compressed within the lower mold cavity. The second guide rod moves downwards along the second guide hole, causing the base to move downwards until it is blocked by the lower mold cavity and can no longer move downwards. During the mold opening process between the upper and lower molds, the second compression spring returns to its original length, causing the second guide rod to move upward along the second guide hole, thus driving the base to move upward. However, under the limiting action of the second limiting block, the second compression spring is prevented from continuing to lengthen, thus preventing the base from moving upward further. In a more preferred embodiment, the second guide hole is a countersunk hole.

[0021] Typically, the upper mold base is connected to the power output end of the mold closing drive mechanism. The mold closing drive mechanism can be a cylinder, a hydraulic cylinder, or a structure that combines a motor and a transmission linkage.

[0022] Compared with the prior art, the present invention has the following advantages: This invention achieves high-speed and accurate cardboard conveying through the cooperation of the feeding switching mechanism, the feeding plate, and the pushing mechanism, and automatically pushes out the formed cardboard boxes. It improves the box delivery method of the formed cardboard boxes, has a simple structure, is easy to operate, and can automatically feed the material into place and push out the formed cardboard boxes at the same time, thereby improving the production efficiency of cardboard boxes. It can also fold and roll the edges of the cardboard boxes in one go through the forming mold, forming them in one go, saving time and labor, and greatly improving the folding and rolling efficiency of the cardboard boxes. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the structure of Embodiment 1 of the present invention; Figure 2 yes Figure 1 The main view; Figure 3 This is a schematic diagram of the material feeding mechanism, the feeding plate, and the pushing mechanism in Embodiment 1 of the present invention; Figure 4 This is a three-dimensional schematic diagram (top view) of the upper and lower molds in the mold-opening state in Embodiment 1 of the present invention. Figure 5 This is a schematic diagram of the upper and lower molds in the open state in Embodiment 1 of the present invention; Figure 6 yes Figure 5 A schematic diagram of the structure in which the opening edge of the semi-finished paper box is gradually inserted into the upper annular crimping groove; Figure 7 yes Figure 6 Enlarged diagram of A in the middle; Figure 8 yes Figure 7 A schematic diagram of the structure in which the opening edge of a semi-finished paper box gradually inserts upwards into the annular rolled edge groove; Figure 9 This is a schematic diagram of the upper and lower molds in the closed state in Embodiment 1 of the present invention; Figure 10 yes Figure 9 Enlarged diagram of B in the middle; Figure 11 This is a schematic diagram of the structure of a cardboard box gradually folded and rolled into shape in Embodiment 1 of the present invention; Figure 12 This is a schematic diagram of the structure of Embodiment 2 of the present invention; Figure 13 yes Figure 12 A schematic diagram of the upper and lower molds in the closed state. Detailed Implementation

[0024] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments.

[0025] Example 1

[0026] like Figure 1-11As shown, the one-time forming machine for folding and rolling paper boxes in this embodiment includes a frame 1, a forming mold 2, a feeding mechanism 3, a feeding plate 4, and a pushing mechanism 5. A feeding station 11 is provided at the rear of the frame 1, and a forming station 12 is provided at the front of the frame 1. The forming mold 2 is mounted on the forming station 12. The forming mold 2 includes an upper mold 21 and a lower mold 22, and a mold closing drive mechanism 23 capable of driving the upper mold 21 and the lower mold 22 to open and close. The mold closing drive mechanism 23 is mounted on the frame 1. The upper mold 21 includes an upper mold base 211, an upper mold body 212, and a forming head 213. The upper mold body 212 is mounted on the upper mold base 211, and an upper heating pipe 2121 is provided in the upper mold body 212. The lower mold 22 includes a lower mold base 221 and a lower mold body 222. 2. A base support 223 and a rolled edge plate 224 are provided. The lower mold body 222 is mounted on the lower mold base 221, and a lower heating pipe 2221 is provided in the lower mold body 222. The feeding mechanism 3 is set on the frame 1 and corresponds to the feeding station 11. The feeding plate 4 is movably mounted on the frame 1. The frame 1 is provided with a feeding switching mechanism 6 that can drive the feeding plate 4 to switch positions between the feeding station 11 and the forming station 12. The pushing mechanism 5 is installed at the front end of the feeding plate 4. When the feeding plate 4 moves to the forming station 12, the feeding plate 4 is located between the forming head 213 and the base support 223. The lower part of the upper mold body 212 is provided with an upper mold cavity 2122 with an opening facing downward. The forming head 213 is installed in the upper mold cavity 2122 through a first elastic element 23. The depth of the upper mold cavity 2122 is the same as the upper height of the forming head 213; the upper surface of the lower mold body 222 is provided with an upwardly protruding first boss 2222, the interior of the first boss 2222 is provided with an upwardly opening forming cavity 2223, the interior of the lower mold body 222 is provided with a lower mold cavity 2224, the lower mold cavity 2224 is located below the forming cavity 2223 and communicates with the forming cavity 2223, the lower part 2133 of the forming head 213 matches the forming cavity 2223, and the bottom support 223 is installed in the lower mold cavity 2224 through the second elastic element 24; the center of the rolled edge plate 224 is provided with a guide hole 2243 corresponding to the first boss 2222, and the rolled edge plate 224 is fitted onto the first boss through the guide hole 2243. On 2222, the hem plate 224 is mounted on the lower mold body 222 via the third elastic member 25. The height of the hem plate 224 is greater than the height of the first boss 2222. The upper part of the forming head 213 matches the guide through hole 2243. The upper opening edge of the guide through hole 2243 is provided with an upward-facing lower annular hem groove 2242. The lower opening edge of the upper mold cavity 2122 is provided with a downward-facing upper annular hem groove 2123. The upper annular hem groove 2123 and the lower annular hem groove 2242 are correspondingly engaged. When the upper mold 21 and the lower mold 22 are in the mold-opening state, the upper surface of the bottom support 223 is higher than the upper surface of the hem plate 224, and the upper surface of the hem plate 224 is higher than the upper opening edge of the forming cavity 2223.During the mold closing process of the upper mold 21 and the lower mold 22, there is an annular gap 7 between the upper part of the forming head 213 and the inner wall of the guide hole 2243, allowing the cardboard to pass through. The lower end face of the upper mold body 212 contacts and engages with the upper surface of the edge-curling plate 224, and the annular gap 7 communicates with the upper annular edge-curling groove 2123.

[0027] The forming head 213 is installed in the upper mold cavity 2122 via a first elastic element 23, so that the forming head 213 is connected to the upper mold cavity 2122 via the first elastic element 23, and the forming head 213 can extend and retract vertically in the upper mold cavity 2122. The bottom support 223 is installed in the lower mold cavity 2224 via a second elastic element 24, so that the bottom support 223 is connected to the lower mold cavity 2224 via the second elastic element 24, and the bottom support 223 can extend and retract vertically in the lower mold cavity 2224 and the forming cavity 2223. The rolled edge plate 224 is installed on the lower mold body 222 via a third elastic element 25, so that the rolled edge plate 224 is connected to the lower mold body 222 via the third elastic element 25, and the rolled edge plate 224 can extend and retract vertically along the outer wall of the first boss 2222.

[0028] During operation, a stack of cut cardboard (with waterproof adhesive layers on both the inner and outer surfaces) is first placed onto the feeding mechanism 3. The feeding switching mechanism 6 then drives the feeding plate 4 to move to the feeding station 11. The upper mold 212 is heated by the upper heating pipe 2121, and the lower mold 222 is heated by the lower heating pipe 2221. Next, the feeding mechanism 3 places a piece of cardboard onto the feeding plate 4, while the previously formed cardboard box is still on the base 223. Then, the feeding switching mechanism 6 drives the feeding plate 4 to move towards the forming station 12, and the pushing mechanism 5 at the front end of the feeding plate 4 pushes the previously formed cardboard box forward. The cardboard box is moved from the base 223 to the external delivery conveyor belt for transport, while the cardboard on the feeding plate 4 is quickly fed between the forming head 213 and the base 223. Next, the mold clamping drive mechanism 23 drives the upper mold 21 to press down, causing the lower surface of the forming head 213 to descend and contact the upper surface of the base 223, gradually clamping the cardboard. The upper mold body 212 continues to move downwards, and the base 223 retracts into the forming cavity 2223, causing the four sides of the cardboard to contact the upper surface of the edge-curling plate 224 (i.e., the upper opening edge of the guide hole 2243). The four sides of the cardboard then fold inwards to form a semi-finished cardboard box. Before the lower part 2133 of the forming head 213 is in the forming cavity 2223, and before the lower end face of the upper mold body 212 contacts the upper surface of the edge-rolling plate 224, the opening edge of the semi-finished paper box will naturally move towards the outer wall of the forming head 213 and insert into the upper annular edge-rolling groove 2123. Then, the upper mold body 212 continues to move downward until the forming head 213 completely presses the bottom support 223 back into the lower mold cavity 2224. The lower part 2133 of the forming head 213 is in the forming cavity 2223. Under the obstruction of the lower mold cavity 2224, the bottom support 223 cannot move downward in the lower mold cavity 2224. The forming head 213 is in the forming cavity. 2223 can no longer move downwards, so that the upper surface of the base 223 and the inner wall of the forming cavity 2223 form a box-shaped body. The semi-finished paper box is completely held by the forming head 213 and the base 223 in the box-shaped body. Under the heating of the upper mold 212 and the lower mold 222, the four corners of the semi-finished paper box are thermoformed together. At this time, the upper part of the four sides of the semi-finished paper box is in the annular gap 7. The lower end face of the upper mold 212 begins to contact the upper surface of the edge rolling plate 224. The lower annular edge rolling groove 2242 of the edge rolling plate 224 and the upper annular edge rolling groove 2123 of the upper mold 212 correspond to form an annular edge rolling groove 8 with the opening facing downward.Next, since the height of the edge-curling plate 224 is greater than the height of the first boss 2222, the annular gap 7 communicates with the annular edge-curling groove 8. Because the fully clamped semi-finished cardboard box has no downward movement space in the forming cavity 2223, under the action of the first elastic element 23, the upper mold body 212 continues to move downward, causing the edge-curling plate 224 to move downward along the outer wall of the first boss 2222. The length of the four sides of the semi-finished cardboard box in the annular gap 7 gradually shortens, and the opening edge of the semi-finished cardboard box gradually inserts upward into the annular edge-curling groove 8 under the guidance of the annular edge-curling groove 8, causing the opening edge of the semi-finished cardboard box to gradually bend outward for edge-curling operation. Finally, the mold-closing drive mechanism 23 drives the upper mold 21 to rise upward, allowing the edge-curled cardboard box to be demolded, producing the finished cardboard box. At this time, the feeding switching mechanism 6 drives the feeding plate 4 to quickly return to the unloading station 11 to pick up the next cardboard, waiting for it to be continuously conveyed to the forming station 12.

[0029] The feeding plate 4 is provided with a positioning through hole 41 that can accommodate cardboard. By placing the cardboard into the positioning through hole 41, the cardboard can be fixed in a specific position and will not shift or move.

[0030] The feeding plate 4 is a U-shaped plate 42 with its opening facing forward. The positioning through hole 41 is located in the opening of the U-shaped plate 42. The pushing mechanism 5 includes two pushing units 51, both of which are mounted on the U-shaped plate 42 and located on opposite sides of the opening. The purpose of setting the feeding plate 4 in a U-shape is that when the bottom support 223 lifts the cardboard upwards, the feeding plate 4 can retract backwards through the U-shaped notch, preventing the feeding plate 4 from being stuck by the second elastic element 24 below the bottom support 223 and unable to retract.

[0031] The pushing unit 51 includes a pushing mounting base 511 and an elastic strip 512. The pushing mounting base 511 is mounted on the U-shaped plate 42. One end of the elastic strip 512 is mounted on the pushing mounting base 511, and the other end of the elastic strip 512 gradually slopes outward from the back to the front towards the opening of the U-shaped plate 42. The moving elastic strip 512 pushes the formed paper box on the lower mold 22 forward, achieving a smooth pushing process. Because the elastic strip 512 is flexible, it can prevent the paper box from being impacted or damaged. In addition, because the elastic strip 512 has a certain degree of elasticity, it can automatically return to its initial state after the pushing is completed, ready for the next pushing operation, thus improving production efficiency.

[0032] The feeding station 11 is provided with a first mounting plate 111 and a second mounting plate 112 arranged sequentially from bottom to top. The first mounting plate 111 is suspended on the frame 1, and the second mounting plate 112 is suspended on the first mounting plate 111. The feeding mechanism 3 is set on the second mounting plate 112, the feeding switching mechanism 6 is set on the first mounting plate 111, and the feeding plate 4 is movably mounted on the first mounting plate 111. This suspended installation method can maximize the use of the space between the frame 1, the first mounting plate 111, and the second mounting plate 112, making the entire equipment structure more compact, occupying less space, and improving space utilization. Furthermore, by suspending the second mounting plate 112 on the first mounting plate 111 and setting the feeding mechanism 3 on the second mounting plate 112, the interference of the feeding mechanism 3 on the movement of the feeding plate 4 during feeding can be reduced, improving the stability of the movement of the feeding plate 4.

[0033] The feeding mechanism 3 includes a feeding rack 31 and an adsorption mechanism 32. The feeding rack 31 is mounted on the second mounting plate 112 and has a feeding channel 311 that runs vertically through it. The second mounting plate 112 has a second discharge port 1121 and the first mounting plate 111 has a first discharge port 1111. The feeding channel 311, the second discharge port 1121, and the first discharge port 1111 are connected sequentially from top to bottom. The adsorption mechanism 32 is located below the first discharge port 1111 and the adsorption end of the adsorption mechanism 32 is facing upward. The feeding station 11 is provided with a first driving mechanism 113 that can drive the adsorption mechanism 32 to move up and down between the first discharge port 1111 and the second discharge port 1121. When the feeding plate 4 is in the feeding station 11, the positioning through hole 41 is above the first discharge port 1111 and corresponds to the first discharge port 1111. First, the entire stack of cut cardboard is placed into the feeding channel 311 of the feeding rack 31, and the feeding plate 4 is moved to directly above the first feeding port 1111 by the feeding switching mechanism 6. Then, the first driving mechanism 113 drives the adsorption mechanism 32 to rise, so that the adsorption end of the adsorption mechanism 32 passes through the first feeding port 1111, the positioning through hole 41, and the second feeding port 1121 from bottom to top. The cardboard at the bottom of the feeding channel 311 is adsorbed through the second feeding port 1121 by the adsorption end of the adsorption mechanism 32. Next, the adsorbed cardboard is quickly placed into the positioning through hole 41 on the feeding plate 4, and the negative pressure of the adsorption end of the adsorption mechanism 32 is released to release the adsorption of the cardboard. Usually, the first driving mechanism 113 is a cylinder.

[0034] The adsorption mechanism 32 includes an adsorption seat 321, four positioning posts 322, and four vacuum suction heads 323. The number of positioning posts 322 and vacuum suction heads 323 is the same and they correspond one-to-one. The power output direction of the first drive mechanism 113 is upward. The adsorption seat 321 is mounted on the power output end of the first drive mechanism 113. Each positioning post 322 is vertically mounted on the adsorption seat 321. Each vacuum suction head 323 is mounted on the upper end of its corresponding positioning post 322, with the adsorption direction of the vacuum suction head 323 facing upward. Typically, each vacuum suction head 323 is connected to an external vacuum pump. During operation, the external vacuum pump is started to evacuate the vacuum suction head 323, creating a negative pressure zone at the suction end of each vacuum suction head 323. The first drive mechanism 113 drives the suction seat 321 to move upward, which in turn drives each positioning post 322 and the vacuum suction head 323 on it to move upward until the suction end of each vacuum suction head 323 picks up the cardboard at the bottom of the feeding channel 311. Then, the first drive mechanism 113 drives the suction seat 321 to move downward, which in turn drives each positioning post 322 and the vacuum suction head 323 on it to move downward, quickly placing the picked-up cardboard into the positioning through hole 41 on the feeding plate 4.

[0035] The feeding switching mechanism 6 includes a feeding drive unit 61, two guide rails 62, and two guide bars 63. The feeding drive unit 61 is mounted on the first mounting plate 111. The two guide rails 62 are mounted on the first mounting plate 111 in a front-to-back direction, and the first discharge port 1111 is located between the two guide rails 62. The two guide bars 63 are respectively mounted in the corresponding guide rails 62 and can move back and forth in the guide rails 62. The feeding plate 4 is mounted on the two guide bars 63, and the power output end of the feeding drive unit 61 is connected to one of the guide bars 63. The feeding drive unit 61 drives the guide bar 63 to move back and forth in the guide rails 62, thereby driving the feeding plate 4 to move back and forth between the feeding station 11 and the forming station 12. Typically, the aforementioned feeding drive unit 61 can adopt a structure in which a drive motor, a drive wheel, a driven wheel, and a timing belt cooperate. Both the drive wheel and the driven wheel can be rotatably mounted on the first mounting plate 111. The timing belt is tensioned outside the drive wheel and the driven wheel. The timing belt is connected to one of the guide bars 63. The drive motor drives the drive wheel to rotate, which drives the driven wheel and the timing belt to transmit, thereby driving the guide bar 63 to move back and forth on the guide rail 62.

[0036] The elastic force of the first elastic element 23 is greater than that of the second elastic element 24, and the elastic force of the third elastic element 25 is greater than that of the second elastic element 24. Designing the elastic forces of the first elastic element 23 and the third elastic element 25 to be relatively large provides sufficient pressure and support, ensuring stable positioning and fixation of the forming head 213, base 223, and edge-rolling plate 224, guaranteeing the stability of the mold during operation and forming. It also allows for a certain pressure fit with components such as the forming head 213 and edge-rolling plate 224, providing appropriate pressure and deformation to the semi-finished cardboard box during edge-rolling, thereby achieving accurate edge-rolling and ensuring proper support and positioning of the semi-finished cardboard box during forming. Typically, the elastic force of the first elastic element 23 is greater than that of the third elastic element 25.

[0037] The first elastic element 23 includes a first guide rod 231, a first compression spring 232, and a first limiting block 233. The upper mold body 212 has a first guide hole 2126 communicating with the upper mold cavity 2122. The first guide rod 231 passes through the first guide hole 2126, and the lower end of the first guide rod 231 is connected to the upper surface of the forming head 213. The first limiting block 233 is installed on the upper end of the first guide rod 231, and the first limiting block 233 is engaged with the upper opening edge of the first guide hole 2126. The first compression spring 232 is fitted onto the first guide rod 231, and the upper end of the first compression spring 232 contacts the bottom of the groove in the upper mold cavity 2122, while the lower end of the first compression spring 232 contacts the upper surface of the forming head 213. When the upper mold 21 and lower mold 22 are in the closed state, neither the forming head 213 nor the base 223 can move downwards. At this time, the upper mold body 212 continues to move downwards along the forming head 213, and the first compression spring 232 is compressed, causing the lower end of the upper mold body 212 to move downwards and contact the upper surface of the rolled edge plate 224. When the upper mold 21 and lower mold 22 are in the open state, the first compression spring 232 returns to its original length, causing the upper mold body 212 to move upwards along the first guide rod 231. However, under the limiting action of the first limiting block 233, the first compression spring 232 is restricted from further lengthening, preventing the upper mold body 212 from moving upwards further. In a more preferred embodiment, the first guide hole 2126 is a countersunk hole.

[0038] The third elastic element 25 includes a first cylinder 251, a third guide rod 252, a third limiting block 253, and a third compression spring 254. The rolled edge plate 224 has a third guide hole 2241 that extends vertically through it. The lower mold body 222 has a fourth guide hole 2225 corresponding to the third guide hole 2241. The first cylinder 251 is mounted on the lower mold base 221, with the piston rod of the first cylinder 251 extending upwards. The third guide rod 252 is located in the fourth guide hole 2225. In the third guide hole 2241, the third limiting block 253 is installed on the upper end of the third guide rod 252 and engages with the upper opening edge of the third guide hole 2241; the lower end of the third guide rod 252 is connected to the piston rod end of the first cylinder 251; the third compression spring 254 is fitted on the third guide rod 252, the upper end of the third compression spring 254 contacts the lower surface of the rolled edge plate 224, and the lower end of the third compression spring 254 contacts the upper surface of the lower mold body 222. After the edge is rolled, the upper mold 21 is lifted upward by the mold closing drive mechanism 23. Since the forming head 213 will continue to be pulled downward under the reset action of the first compression spring 232, if the roll plate moves upward at this time due to its ability to extend and retract, the rolled edge of the semi-finished carton will loosen. At this time, the first cylinder 251 of the lower mold body 222 retracts, pulling the third guide rod 252, so that the third compression spring 254 on the third guide rod 252 does not rebound and reset temporarily, thereby pulling the edge rolling plate 224 to prevent it from moving upward. When the upper mold 21 is fully opened, the bottom support 223 extends upward under the rebound reset of the second elastic element 24 and is above the forming cavity 2223, so that the finished carton is pushed upward. After the finished carton is pushed out, the first cylinder 251 of the lower mold body 222 extends, releasing the third guide rod 252 and the edge rolling plate 224 connected to it, allowing the edge rolling plate 224 to return to its original position under the rebound action of the third compression spring 254.

[0039] The second elastic element 24 includes a second guide rod 241, a second compression spring 242, and a second limiting block 243. The lower mold body 222 has a second guide hole 2226 communicating with the lower mold cavity 2224. The second guide rod 241 passes through the second guide hole 2226, and the upper end of the second guide rod 241 is connected to the lower surface of the base 223. The second limiting block 243 is installed at the lower end of the second guide rod 241, and the second limiting block 243 is engaged with the lower opening edge of the second guide hole 2226. The second compression spring 242 is fitted onto the second guide rod 241, and the upper end of the second compression spring 242 contacts the upper surface of the base 223, while the lower end of the second compression spring 242 contacts the bottom of the groove in the lower mold cavity 2224. During the mold closing process of the upper mold 21 and lower mold 22, neither the forming head 213 nor the base support 223 can move downwards. At this time, the second compression spring 242 is compressed in the lower mold cavity 2224, and the second guide rod 241 moves downwards along the second guide hole 2226, driving the base support 223 downwards until it is blocked by the lower mold cavity 2224 and can no longer move downwards. During the mold opening process of the upper mold 21 and lower mold 22, the second compression spring 242 returns to its original length, causing the second guide rod 241 to move upwards along the second guide hole 2226, driving the base support 223 upwards. However, under the limiting action of the second limiting block 243, the second compression spring 242 is restricted from further lengthening, preventing the base support 223 from continuing to move upwards. In a more preferred embodiment, the second guide hole 2226 is a countersunk hole.

[0040] Typically, the upper mold base 211 is connected to the power output end of the mold closing drive mechanism 23. The mold closing drive mechanism 23 can be a cylinder, a hydraulic cylinder, or a structure that combines a motor and a transmission link.

[0041] Example 2

[0042] like Figure 12-13 As shown, the difference between the cardboard box folding and edge-rolling one-time forming machine in this embodiment and that in Embodiment 1 is: The upper mold body 212 has a second cylinder 2124 inside, with the piston rod of the second cylinder 2124 extending downwards. The upper mold body 212 also has a fifth guide hole 2125 communicating with the upper mold cavity 2122. The piston rod of the second cylinder 2124 passes through the fifth guide hole 2125, with its end positioned within the upper mold cavity 2122. The upper surface of the forming head 213 is connected to the end of the piston rod of the second cylinder 2124. The forming head 213 has an air passage 2131 inside, connected to an external adsorption device. The lower surface of the forming head 213 has multiple suction holes 2132 communicating with the air passage 2131. This configuration allows the forming head 213 to extend and retract vertically within the upper mold cavity 2122. When the upper mold 21 and the lower mold 22 open, the external adsorption device is activated to evacuate the air passage 2131 of the forming head 213, so that a negative pressure zone is formed at each air suction hole 2132. The forming head 213 adsorbs the already rolled paper box, and then the second cylinder 2124 retracts upward, driving the forming head 213 and the paper box it adsorbs to move upward, so as to prevent the roll plate from moving upward and causing the rolled edge of the semi-finished paper box to loosen.

[0043] The third elastic element 25 includes a third guide rod 252, a third limiting block 253, and a third compression spring 254. The rolled edge plate 224 has a third guide hole 2241 that runs vertically through it. The third guide rod 252 is located in the third guide hole 2241. The third limiting block 253 is installed on the upper end of the third guide rod 252 and engages with the upper opening edge of the third guide hole 2241. The lower end of the third guide rod 252 is connected to the upper surface of the lower mold body 222. The third compression spring 254 is fitted on the third guide rod 252. The upper end of the third compression spring 254 contacts the lower surface of the rolled edge plate 224, and the lower end of the third compression spring 254 contacts the upper surface of the lower mold body 222. When the upper mold 21 and lower mold 22 are in the closed state, neither the forming head 213 nor the base 223 can move downwards. At this time, the upper mold body 212 continues to move downwards along the forming head 213, and the third compression spring 254 is compressed, causing the rolled edge plate 224 to move downwards along the outer wall of the first boss 2222. When the upper mold 21 and lower mold 22 are in the open state, the third compression spring 254 returns to its original length, causing the rolled edge plate 224 to move upwards along the outer wall of the first boss 2222. However, under the limiting action of the third limiting block 253, the third compression spring 254 is restricted from further lengthening, preventing the rolled edge plate 224 from moving upwards further. In a more preferred embodiment, the third guide hole 2241 is a countersunk hole.

[0044] Furthermore, it should be noted that the names of the various parts of the specific embodiments described in this specification may differ. All equivalent or simple variations made to the structure, features, and principles described in this invention are included within the scope of protection of this invention. Those skilled in the art can make various modifications or additions to the described specific embodiments or use similar methods to replace them, as long as they do not deviate from the structure of this invention or exceed the scope defined in these claims, all of which should fall within the scope of protection of this invention.

Claims

1. A one-time forming machine for folding and curling edges of paper boxes, comprising a frame and a forming mold, wherein a feeding station is provided at the rear of the frame and a forming station is provided at the front of the frame, and the forming mold is disposed at the forming station; the forming mold includes an upper mold and a lower mold, and a mold closing drive mechanism capable of driving the upper mold and the lower mold to perform opening and closing actions, the mold closing drive mechanism being mounted on the frame; the upper mold includes an upper mold base, an upper mold body, and a forming head, the upper mold body being mounted on the upper mold base, and an upper heating pipe being disposed in the upper mold body; the lower mold includes a lower mold base, a lower mold body, and a base support, the lower mold body being mounted on the lower mold base. The lower mold body is provided with a lower heating pipe; the lower part of the upper mold body is provided with a downward-opening upper mold cavity, and the forming head is installed in the upper mold cavity through a first elastic element. The depth of the upper mold cavity is the same as the upper height of the forming head; the upper surface of the lower mold body is provided with an upward-protruding first boss, and the interior of the first boss is provided with an upward-opening forming cavity. The interior of the lower mold body is provided with a lower mold cavity, which is located below and communicates with the forming cavity. The lower part of the forming head matches the forming cavity. The bottom support is installed in the lower mold cavity through a second elastic element. Its characteristics are: It also includes a feeding mechanism, a feeding plate, and a pushing mechanism. The feeding mechanism is mounted on the frame and corresponds to the feeding station. The feeding plate is movably mounted on the frame. The frame is equipped with a feeding switching mechanism that can drive the feeding plate to switch positions between the feeding station and the forming station. The pushing mechanism is mounted on the front end of the feeding plate. When the feeding plate moves to the forming station, it is positioned between the forming head and the base. The lower mold also includes a rolled edge plate. The center of the rolled edge plate has a guide hole corresponding to the first boss. The rolled edge plate is fitted onto the first boss through the guide hole, and the rolled edge plate is mounted on the lower mold body through a third elastic element. The elastic force of the first elastic element is greater than that of the second elastic element, and the elastic force of the third elastic element is greater than that of the second elastic element. The force is greater than the elastic force of the second elastic element; the height of the crimping plate is greater than the height of the first boss, and the upper part of the forming head matches the guide through hole; the upper opening edge of the guide through hole is provided with an upward-facing lower annular crimping groove, and the lower opening edge of the upper mold cavity is provided with a downward-facing upper annular crimping groove, the upper annular crimping groove and the lower annular crimping groove are correspondingly matched; when the upper mold and the lower mold are in the mold-opening state, the upper surface of the base is higher than the upper surface of the crimping plate, and the upper surface of the crimping plate is higher than the upper opening edge of the forming cavity; when the upper mold and the lower mold are in the mold-closing process, there is an annular gap between the upper part of the forming head and the inner wall of the guide through hole that allows the cardboard to pass through, the lower end face of the upper mold body is in contact with the upper surface of the crimping plate, and the annular gap... The gap is connected to the upper annular crimping groove; the feeding plate is driven to move towards the forming station by the feeding switching mechanism. The pushing mechanism at the front end of the feeding plate pushes the previously formed cardboard box forward, allowing the cardboard box to move from the bottom tray to the external box delivery conveyor belt for conveying. At the same time, the cardboard on the feeding plate is sent to the space between the forming head and the bottom tray. The mold closing drive mechanism drives the upper mold to start pressing down, causing the lower surface of the forming head to descend and contact the upper surface of the bottom tray to gradually clamp the cardboard. The upper mold continues to move downward, and the bottom tray retracts downward into the forming cavity, so that the four sides of the cardboard contact the upper surface of the crimping plate. The four sides of the cardboard will then fold inward to form a semi-finished cardboard box. Under the heating of the upper and lower molds, the semi-finished cardboard box... The four corners are joined together for thermoforming, at which point the upper part of the four sides of the semi-finished paper box is in the annular gap; the lower annular curling groove of the curling plate and the upper annular curling groove of the upper mold body correspond to each other to form an annular curling groove with the opening facing downward; under the action of the first elastic element, the upper mold body continues to move downward, causing the curling plate to move downward along the outer wall of the first boss, and the length of the four sides of the semi-finished paper box in the annular gap gradually becomes shorter, and the opening edge of the semi-finished paper box is gradually inserted upward into the annular curling groove under the guidance of the annular curling groove, so that the opening edge of the semi-finished paper box gradually bends outward to perform the curling operation; the upper mold is driven to rise upward by the mold closing drive mechanism, so that the curled paper box is demolded to obtain the finished paper box.

2. The one-time forming machine for folding and curling edges of paper boxes as described in claim 1, characterized in that: The feeding plate is provided with positioning through holes that can accommodate cardboard.

3. The one-time forming machine for folding and curling edges of paper boxes as described in claim 2, characterized in that: The feeding plate is a U-shaped plate with the opening facing forward. The positioning through hole is set in the opening of the U-shaped plate. The pushing mechanism includes two pushing units, both of which are installed on the U-shaped plate and are respectively located on both sides of the opening of the U-shaped plate.

4. The one-time forming machine for folding and curling edges of paper boxes as described in claim 3, characterized in that: The pushing unit includes a pushing mounting base and an elastic strip. The pushing mounting base is mounted on the U-shaped plate, one end of the elastic strip is mounted on the pushing mounting base, and the other end of the elastic strip gradually tilts outward from the opening of the U-shaped plate from back to front.

5. The one-time forming machine for folding and curling edges of paper boxes as described in claim 2, characterized in that: The material feeding station is provided with a first mounting plate and a second mounting plate from bottom to top. The first mounting plate is suspended on the frame, and the second mounting plate is suspended on the first mounting plate. The material feeding mechanism is set on the second mounting plate, and the material feeding switching mechanism is set on the first mounting plate. The material feeding plate is movably mounted on the first mounting plate.

6. The one-time forming machine for folding and curling edges of paper boxes as described in claim 5, characterized in that: The feeding mechanism includes a feeding rack and an adsorption mechanism. The feeding rack is mounted on the second mounting plate and has a feeding channel that runs vertically through it. The second mounting plate has a second discharge port, and the first mounting plate has a first discharge port. The feeding channel, the second discharge port, and the first discharge port are connected sequentially from top to bottom. The adsorption mechanism is located below the first discharge port, and the adsorption end of the adsorption mechanism faces upward. The feeding station is equipped with a first driving mechanism that can drive the adsorption mechanism to move up and down between the first discharge port and the second discharge port. When the feeding plate is in the feeding station, the positioning through hole is located above the first discharge port and corresponds to the first discharge port. The adsorption mechanism includes an adsorption seat, at least three positioning columns and at least three vacuum suction heads. The number of positioning columns and vacuum suction heads are the same and correspond one-to-one. The power output direction of the first driving mechanism is set upward. The adsorption seat is installed on the power output end of the first driving mechanism. Each positioning column is installed vertically on the adsorption seat. Each vacuum suction head is installed on the upper end of the corresponding positioning column. The adsorption direction of the vacuum suction head is set upward. The feeding switching mechanism includes a feeding drive unit, two guide rails and two guide bars. The feeding drive unit is mounted on the first mounting plate. The two guide rails are mounted on the first mounting plate in a front-to-back direction, and the first discharge port is located between the two guide rails. The two guide bars are respectively mounted in the corresponding guide rails and can move back and forth in the guide rails. The feeding plate is mounted on the two guide bars, and the power output end of the feeding drive unit is connected to one of the guide bars.

7. The one-time forming machine for folding and curling edges of paper boxes as described in claim 1, characterized in that: The first elastic element includes a first guide rod, a first compression spring, and a first limiting block. The upper mold body has a first guide hole communicating with the upper mold cavity. The first guide rod passes through the first guide hole, and the lower end of the first guide rod is connected to the upper surface of the forming head. The first limiting block is installed on the upper end of the first guide rod, and the first limiting block is engaged with the upper opening edge of the first guide hole. The first compression spring is fitted onto the first guide rod, and the upper end of the first compression spring contacts the bottom of the groove of the upper mold cavity, while the lower end of the first compression spring contacts the upper surface of the forming head. The third elastic element includes a first cylinder, a third guide rod, a third limiting block, and a third compression spring. The interior of the rolled edge plate is provided with a third guide hole that runs vertically through it. The lower mold body is provided with a fourth guide hole corresponding to the third guide hole. The first cylinder is mounted on the lower mold base, with the piston rod of the first cylinder extending upwards. The third guide rod is located in both the fourth and third guide holes. The third limiting block is mounted on the upper end of the third guide rod and engages with the upper opening edge of the third guide hole. The lower end of the third guide rod is connected to the end of the piston rod of the first cylinder. The third compression spring is fitted onto the third guide rod, with its upper end contacting the lower surface of the rolled edge plate and its lower end contacting the upper surface of the lower mold body.

8. The one-time forming machine for folding and curling edges of paper boxes as described in claim 1, characterized in that: The upper mold body is equipped with a second cylinder inside, the piston rod of the second cylinder extends downward, the upper mold body is equipped with a fifth guide hole communicating with the upper mold cavity, the piston rod of the second cylinder passes through the fifth guide hole and the end of the piston rod of the second cylinder is in the upper mold cavity, the upper surface of the forming head is connected to the end of the piston rod of the second cylinder, the interior of the forming head is equipped with an air passage connected to an external adsorption device, and the lower surface of the forming head is equipped with multiple suction holes communicating with the air passage; The third elastic element includes a third guide rod, a third limiting block, and a third compression spring. The interior of the rolled edge plate is provided with a third guide hole that runs vertically through it. The third guide rod is located in the third guide hole. The third limiting block is installed on the upper end of the third guide rod and engages with the upper opening edge of the third guide hole. The lower end of the third guide rod is connected to the upper surface of the lower mold body. The third compression spring is fitted on the third guide rod. The upper end of the third compression spring contacts the lower surface of the rolled edge plate, and the lower end of the third compression spring contacts the upper surface of the lower mold body.

9. The one-time forming machine for folding and curling edges of paper boxes as described in claim 1, characterized in that: The second elastic element includes a second guide rod, a second compression spring, and a second limiting block. The lower mold body has a second guide hole communicating with the lower mold cavity. The second guide rod passes through the second guide hole, and the upper end of the second guide rod is connected to the lower surface of the base. The second limiting block is installed at the lower end of the second guide rod and is engaged with the lower opening edge of the second guide hole. The second compression spring is fitted onto the second guide rod, and the upper end of the second compression spring contacts the upper surface of the base, while the lower end of the second compression spring contacts the bottom of the groove in the lower mold cavity.

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