Discharging system and method for improving edge strength of paper dinner plate

Abstract

The invention relates to the technical field of paper dinner plate production, and provides a discharging system for improving the edge strength of a paper dinner plate, the discharging system comprises an upper forming die and a lower forming die, the upper forming die and the lower forming die are used for forming the paper dinner plate, and an opening of the formed paper dinner plate faces downwards; the discharging system is used for turning over the formed paper dinner plates, the discharging system comprises a first conveying table, a lifting table, a rotating seat and a plurality of suction cups, a first conveying belt is rotatably connected to the first conveying table, and the lifting table is located on one side of the first conveying belt and can move up and down; the rotating base is rotatably connected to the lifting table and located above the first conveying belt, and the suction cups are distributed on the rotating base at intervals and used for sucking the paper dinner plates in the forming upper mold. The paper dinner plate has the effect of improving the strength of the edge of the paper dinner plate. In addition, the invention further provides a discharging method for improving the edge strength of the paper dinner plate.

Description

Technical Field

[0001] The present application relates to the technical field of paper dinner plate production, and in particular to a feeding system and method for increasing the edge strength of a paper dinner plate. Background Art

[0002] Paper plates are tableware made of paper material, which are used to replace traditional plastic plates to reduce environmental pollution. Paper plates are lightweight, easy to degrade, and environmentally friendly, so they are widely used in some fast food restaurants, takeaways, and other occasions. Figure 1 The paper dinner plate shown is round in shape and is formed by a forming machine.

[0003] In the related art, a paper plate forming machine includes a frame, a pulp barrel, a heating device, a forming mold, a lifting device and a transfer device. The pulp barrel and the heating device are arranged in the frame. The forming mold includes a lower mold and an upper mold. The lower mold is located below the upper mold and is connected to the frame by sliding in the vertical direction under the drive of the lifting device. The upper mold is connected to the frame by sliding in the horizontal direction under the drive of the transfer device.

[0004] During operation, the lifting device drives the lower mold to extend into the pulp barrel, and then drives the lower mold to extend out of the pulp barrel and make the lower mold abut against the upper mold. At this time, the pulp in the lower mold and the upper mold is heated by the heating device to realize the molding of multiple paper dinner plates. After the lifting device drives the lower mold to separate from the upper mold, the paper dinner plate is located in the upper mold, and the transfer device drives the upper mold to move to the unloading station to facilitate unloading of the paper dinner plate.

[0005] When the paper plate is formed, the notch of the mold is generally upward. When the paper plate is formed, the opening of the paper plate is upward. Due to the sedimentation of pulp, the bottom of the paper plate will be stronger, but the edge strength will be weaker, making the paper plate relatively easy to tear, so it needs to be improved. Summary of the invention

[0006] In order to improve the strength of the edge of the paper dinner plate and reduce the possibility of the paper dinner plate being torn, the present application provides a feeding system for increasing the strength of the edge of the paper dinner plate.

[0007] In the first aspect, the present application provides a feeding system for increasing the edge strength of a paper dinner plate using the following technical solutions: A blanking system for increasing the edge strength of a paper dinner plate comprises a forming upper die and a forming lower die, the forming upper die and the forming lower die are opposite to each other and are used to form the paper dinner plate, the formed paper dinner plate has an opening downward and is located in the forming upper die; The unloading system is used to flip the formed paper dinner plate. The unloading system includes a first conveying platform, a lifting platform, a rotating seat and a plurality of suction cups. The first conveying platform is rotatably connected to a first conveyor belt. The lifting platform is located on one side of the first conveyor belt and can be moved up and down. The rotating seat is rotatably connected to the lifting platform and is located above the first conveyor belt. The suction cups are distributed on the rotating seat at intervals and are used to adsorb the paper dinner plate in the formed upper mold.

[0008] By adopting the above technical solution, during the production process, the paper dinner plate is formed by using the upper forming mold and the lower forming mold so that the opening of the paper dinner box is set downward. In this way, the pulp in the forming mold will flow toward the edge under the action of gravity, ensuring that the edge of the paper dinner plate is thicker, thereby increasing the edge strength of the paper dinner plate.

[0009] After the paper tray is formed in the above-mentioned way, it is not conducive to subsequent stacking and placement because the opening of the paper tray is facing downward (when stacking and placing normally, the opening of the paper tray is required to face upward to ensure that there is enough contact area between the paper tray and the placement table to ensure the safe placement of the paper tray). Therefore, a flipping process is added to use the feeding system to change the direction of the formed paper tray.

[0010] After the paper dinner plate is formed, the upper mold is translated to the top of the rotating seat. First, the rotating seat is driven to rotate so that the suction cup is set upward. Then the suction cup is driven up by the lifting platform so that the suction cup absorbs the paper dinner plate in the cavity. Then the lifting platform is controlled to descend to a certain distance to make room for the rotating seat to rotate so that the suction cup is set downward. Finally, the lifting platform is controlled to descend, and the suction of the suction cup on the paper dinner plate is removed at the same time. The paper dinner plate falls onto the first conveyor belt under the action of gravity. This reciprocating process causes the paper lunch boxes to be stacked up and down, and the stacked paper dinner plates are conveyed out through the first conveyor belt.

[0011] Preferably, it further comprises a plurality of support seats, wherein the support seats are spaced apart along the length direction of the rotating seat, and a plurality of suction cups are spaced apart on the support seats, and each of the suction cups is in the same plane.

[0012] By adopting the above technical solution, the support seat is used as a carrier for the suction cup to be installed. Multiple suction cups correspond to multiple cavities, so that multiple paper lunch boxes can be sucked out at the same time.

[0013] Preferably, the support seat is perpendicular to the rotating seat, a rotating rod is vertically arranged in the middle of the support seat, and the rotating rod is rotatably connected to the rotating seat.

[0014] By adopting the above technical solution, the rotating seat can drive the entire support seat and the suction cup to flip over. The existence of the rotating rod can realize the rotation of the support seat relative to the rotating seat, thereby changing the position of the suction cup relative to the conveying surface of the first conveyor belt, and realizing the stacking of paper lunch boxes at different positions on the first conveyor belt, thereby improving space utilization.

[0015] Preferably, it also includes a linear cylinder, a rack and a gear, wherein the rack is movably arranged along the length direction of the support seat, the linear cylinder is connected to the rack and is used to control the horizontal movement of the rack, the gear is connected to the rotating rod and meshes with the rack, the rack is used to control the rotation of the gear, and the linear cylinder has a self-locking function.

[0016] By adopting the above technical solution, after the suction cup sucks the paper lunch box at the forming upper mold, the lifting platform is controlled to move away from the forming upper mold, and then the linear cylinder is operated to control the linear movement of the rack. The movement of the rack controls the gear to rotate, thereby driving the rotating rod to rotate and realizing the relative rotation of the support seat and the rotating seat. Then the rotating seat is controlled to rotate to complete the flipping of the paper lunch box so that the paper lunch box falls on the first conveyor belt. The self-locking function of the cylinder means that after the cylinder stops moving, it can automatically maintain its current position to prevent the piston rod from moving due to external force or other factors. The self-locking structure belongs to the existing technical means and can be directly applied.

[0017] Preferably, the rotating rod passes through the rotating seat, and two ends of the rotating rod are respectively connected to the gear and the supporting seat, and the supporting seat is detachably connected to the rotating rod; The rotating rod is provided with a first wedge block, a second wedge block and a return spring inside, the wedge surfaces of the first wedge block and the second wedge block are opposite to each other, and both can be movably arranged, and a clearance hole for the first wedge block and the second wedge block to pass through is opened on the side wall of the rotating rod; the rotating rod is also equipped with a pneumatic cylinder, the piston rod of the pneumatic cylinder is located between the first wedge block and the second wedge block, and moves up and down; A through hole is formed on the support seat, and the through hole is used to pass the rotating rod. When the support seat contacts the rotating seat, the pneumatic cylinder controls the first wedge block and the second wedge block to move away from each other, and the first wedge block and the second wedge block are clamped in a preset groove on the support seat. Wherein, the first wedge block and the second wedge block are both connected with the return spring, and the return spring is used to control the return of the first wedge block and the second wedge block.

[0018] By adopting the above technical solution, the rotating rod can rotate on the rotating seat through the ball bearing, and the support seat can be detachably installed on the rotating rod, which is convenient for disassembly and replacement of the support seat to complete the maintenance of the suction cup.

[0019] When the support base needs to be installed on the rotating rod, the support base is first passed through the rotating rod and the support base is contacted with the rotating base. At this time, the support base cannot continue to move along the length direction of the rotating rod.

[0020] Then the piston rod of the pneumatic cylinder is moved downward, and the pressure block at the piston rod will be pressed on the wedge surfaces of the first wedge block and the second wedge block, so that the first wedge block and the second wedge block move away from each other, so that the first wedge block and the second wedge block are clamped in the preset groove on the support seat, and the support seat is limited by the first wedge block and the second wedge block and is fixed on the rotating rod.

[0021] When the first wedge block and the second wedge block move away from each other, the return spring will also be deformed and compressed. When the support seat needs to be removed from the rotating rod, the control piston rod is moved away from the first wedge block and the second wedge block, and under the action of the return spring, the first wedge block and the second wedge block will move horizontally and automatically return to their original position.

[0022] Preferably, it also includes a second conveyor platform, which is located at the output end of the first conveyor platform, and a second conveyor belt is rotatably connected to the second conveyor platform. The second conveyor belt and the first conveyor belt have the same conveying direction, and the conveying surface of the second conveyor belt is lower than the conveying surface of the first conveyor belt.

[0023] By adopting the above technical solution, when the paper lunch boxes on the first conveyor belt are stacked to a certain height, the first conveyor belt is operated to start conveying the paper lunch boxes, so that the paper lunch boxes can be gradually transferred to the second conveyor belt, and then the staff stands at the end of the second conveyor belt to perform quality inspection on the paper lunch boxes.

[0024] Preferably, it further comprises a scissors lift, the second conveying platform is arranged on the scissors lift, and the scissors lift is used to control the up and down movement of the second conveying platform.

[0025] By adopting the above technical solution, since the first conveyor platform is located at a higher position, the scissors lift can control the second conveyor platform to move up and down. After the paper lunch box is transferred to the second conveyor belt, the second conveyor platform can be controlled to move a certain distance in the direction close to the ground, so that the staff can better remove the paper lunch box from the second conveyor belt.

[0026] Preferably, the suction cup is made of elastic material.

[0027] By adopting the above technical solution, the suction cup made of elastic material has good elasticity, which can achieve flexible contact between the suction cup and the paper lunch box, reducing the damage to the paper lunch box caused by adsorption.

[0028] In a second aspect, the present application also provides a method for increasing the edge strength of a paper dinner plate, comprising the following steps: S1. After the paper lunch box is formed, the lifting platform is controlled to move upward and close to the forming upper mold, and then the suction cup is used to suck the paper lunch box in the mold cavity; S2, then controlling the lifting platform to move downward, and operating the rotating seat to rotate, thereby driving the suction cup and the paper lunch box to flip over, so that the opening of the paper lunch box faces upward; S3. When the lifting platform approaches the first conveying platform, the suction cup is controlled to remove the suction force on the paper lunch box, and the paper lunch box falls onto the first conveying belt under the action of its own gravity; this cycle is repeated so that the paper lunch boxes on the first conveying belt are stacked up and down.

[0029] In summary, the present application includes at least one of the following beneficial technical effects: (1) By setting up a lifting platform, a rotating seat and a plurality of suction cups, after the paper dinner plate is formed, the upper mold is translated to the top of the rotating seat. First, the rotating seat is driven to rotate so that the suction cup is set upward. Then, the lifting platform is used to drive the suction cup to rise so that the suction cup absorbs the paper dinner plate in the cavity. Then, the lifting platform is controlled to descend to a certain distance to make room for the rotating seat to rotate so that the suction cup is set downward. Finally, the lifting platform is controlled to descend, and the suction of the suction cup on the paper dinner plate is removed at the same time, and the paper dinner plate falls onto the first conveyor belt under the action of gravity.

[0030] (2) By setting a linear cylinder, a rack and a gear, the linear cylinder controls the linear movement of the rack, and the movement of the rack controls the rotation of the gear, thereby driving the rotating rod to rotate, realizing the relative rotation of the support seat and the rotating seat, so as to adjust the unloading position of the suction cup.

[0031] (3) By setting up a second conveyor, the paper lunch boxes on the first conveyor can continue to be received after being transferred to the second conveyor, thereby realizing continuous production. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a front view of a paper lunch box in the background technology of this application; Figure 2 It is a structural schematic diagram of the feeding system in the embodiment of the present application; Figure 3 It is a partial structural schematic diagram of the feeding system in the embodiment of the present application; Figure 4 yes Figure 3 The structural schematic diagram of the first conveying platform is omitted; Figure 5 It is a structural schematic diagram of a rotating seat in an embodiment of the present application; Figure 6 It is a cross-sectional schematic diagram of the rotating rod and the rotating seat in the embodiment of the present application.

[0033] 1. Forming upper die; 2. First conveying platform; 3. Lifting platform; 4. Rotating seat; 5. Suction cup; 6. Support seat; 7. First conveying belt; 8. Rotating rod; 81. First rod; 82. Second rod; 9. Linear cylinder; 10. Rack; 11. Gear; 12. First wedge block; 13. Second wedge block; 14. Return spring; 15. Pneumatic cylinder; 16. Pressure block; 17. Second conveying platform; 18. Second conveying belt; 19. Scissors lift; 20. Groove. DETAILED DESCRIPTION

[0034] The technical solution of the present application will be described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. The present application can be embodied in many different forms and is not limited to the embodiments described here.

[0035] In the description of the present application, the reference terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" mean that the specific features, structures, materials or characteristics represented in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. Moreover, the specific features, structures, materials or characteristics represented can be combined in any one or more embodiments or examples in a suitable manner.

[0036] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned figure descriptions and any variations thereof are intended to cover non-exclusive inclusions.

[0037] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection; it can also be a detachable connection; or integrated; it can also be a mechanical connection. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present application can be understood according to specific circumstances.

[0038] Some embodiments of the present application are described in detail below in conjunction with the accompanying drawings. In the absence of conflict, those skilled in the art may combine and combine different embodiments or examples and features of different embodiments or examples shown in the present application.

[0039] The present application embodiment discloses a feeding system for increasing the edge strength of a paper dinner plate. Figure 2 and Figure 3The paper lunch box is formed by the upper molding die 1 and the lower molding die, and the upper molding die 1 and the lower molding die are arranged relative to each other up and down. The opening of the formed paper lunch box is arranged downward and is located in the upper molding die 1. During the production process, the paper lunch box is formed by the upper molding die 1 and the lower molding die, so that the opening of the paper lunch box is arranged downward. In this way, the pulp in the molding die will flow toward the edge under the action of gravity, ensuring that the edge of the paper lunch box is thicker, thereby increasing the edge strength of the paper lunch box.

[0040] The unloading system is located on one side of the forming mold and is used to flip and unload the formed paper dinner plates. The unloading system includes a first conveying platform 2, a lifting platform 3, a rotating seat 4 and a plurality of suction cups 5. The first conveying platform 2 is fixedly installed on the ground. The first conveying platform 2 is rotatably connected to the first conveyor belt 7, and the first conveyor belt 7 is used to horizontally convey the paper dinner box. The lifting platform 3 is located on one side of the first conveyor belt 7 and can be moved up and down. The movement of the lifting platform 3 can be achieved by a drive method such as an oil cylinder. The rotating seat 4 is rotatably connected to the lifting platform 3 and is located above the conveying surface of the first conveyor belt 7. The rotation of the rotating seat 4 can be achieved by a motor drive, that is, a rotating motor is installed on the lifting platform 3, and the driving shaft of the rotating motor is connected to the rotating seat 4. The suction cups 5 are distributed on the rotating seat 4 at intervals and are used to adsorb the paper dinner plates in the upper mold 1.

[0041] Among them, a plurality of support seats 6 are installed on the rotating seat 4, and each support seat 6 is spaced apart along the length direction of the rotating seat 4, and the length direction of the support seat 6 is perpendicular to the length direction of the rotating seat 4. The support seats 6 are arranged horizontally, and each support seat 6 is spaced apart and has a plurality of suction cups 5, such as Figure 3 As shown, in this embodiment, there are two suction cups 5, and each suction cup 5 is in the same horizontal plane. The multiple suction cups 5 correspond to the multiple cavities of the upper mold 1, so as to absorb multiple paper lunch boxes at the same time. The suction cup 5 is made of elastic material, and the elastic material can be but not limited to rubber and soft polyvinyl chloride. The suction cup 5 made of elastic material has good elasticity, which can achieve flexible contact between the suction cup 5 and the paper lunch box, reducing the damage to the paper lunch box caused by adsorption.

[0042] When the paper plate has completed the forming process, the upper forming mold 1 is translated to the top of the rotating seat 4. First, the rotating seat 4 is driven to rotate so that the suction cup 5 is facing upward. Next, the suction cup 5 is driven to rise by the lifting platform 3 so that the suction cup 5 can adsorb the paper plate in the cavity. Then, the lifting platform 3 is controlled to descend a certain distance to make room for the rotating seat 4 to rotate. At this time, the rotating seat 4 rotates to turn the suction cup 5 to the downward state. Finally, the lifting platform 3 is continued to be controlled to descend, and at the same time, the suction force of the suction cup 5 on the paper plate is cancelled, and the paper plate falls onto the first conveyor belt 7 under the action of gravity. After such a cyclic operation, the paper plates will be stacked up and down, and the stacked paper plates will be conveyed out via the first conveyor belt 7.

[0043] Combination Figure 4 and Figure 5 Specifically, in this embodiment, the support seat 6 is rotatably connected to the rotating seat 4, and the rotation axis of the support seat 6 is in the vertical direction, that is, the rotation axis of the support seat 6 is parallel to the lifting direction of the lifting platform 3. A rotating rod 8 is vertically arranged on the rotating seat 4, and the rotating rod 8 is rotatably connected to the rotating seat 4 through a ball bearing, and the support seat 6 is installed on one end of the rotating rod 8.

[0044] The rotating seat 4 can drive the entire support seat 6 and the suction cup 5 to flip. The setting of the rotating rod 8 can make the support seat 6 rotate relative to the rotating seat 4, thereby changing the position of the suction cup 5 relative to the conveying surface of the first conveyor belt 7. In this way, the paper lunch boxes can be stacked at different positions on the first conveyor belt 7, effectively improving the space utilization rate. In this embodiment, the rotating rod 8 is controlled to rotate 90 degrees so that the support seat 6 and the rotating seat 4 are parallel.

[0045] A linear cylinder 9 and a rack 10 are also installed on the rotating seat 4, and a gear 11 is coaxially connected to the end of the rotating rod 8 away from the support seat 6. The linear cylinder 9 is connected to the rack 10 to control the horizontal movement of the rack 10, and the movement direction of the rack 10 is parallel to the length direction of the rotating seat 4. The rack 10 is meshed with the gear 11, and the rack 10 is used to control the rotation of the gear 11. The linear cylinder 9 has a self-locking function (the self-locking function of the cylinder means that after the cylinder stops moving, it can automatically maintain its current position to prevent the piston rod from moving due to external force or other factors). The self-locking structure belongs to the existing means and can be directly applied to this application, so it will not be repeated here.

[0046] After the suction cup 5 sucks the paper lunch box at the upper forming mold 1, the lifting platform 3 is controlled to move away from the upper forming mold 1, and then the linear cylinder 9 is operated to control the rack 10 to move linearly. The movement of the rack 10 controls the gear 11 to rotate, thereby driving the rotating rod 8 to rotate, and realizing the relative rotation of the support seat 6 and the rotating seat 4. Then the rotating seat 4 is controlled to rotate to complete the flipping of the paper lunch box so that the paper lunch box falls on the first conveyor belt 7.

[0047] In some embodiments, in combination Figure 6 The cross section of the rotating rod 8 is circular, and the support seat 6 is detachably connected to the rotating rod 8, so that the staff can remove the support seat 6 separately and inspect the suction cup 5. The rotating rod 8 includes a detachable first rod 81 and a second rod 82. One end of the first rod 81 is open and has a cavity. The first rod 81 passes through the entire rotating seat 4. The second rod 82 is threadedly connected to the opening of the first rod 81, and the gear 11 is fixed to the end of the first rod 81 away from the second rod 82.

[0048] The first wedge block 12, the second wedge block 13 and the return spring 14 are installed in the cavity of the first rod 81. The first wedge block 12 and the second wedge block 13 are in the shape of a right-angled trapezoid. The wedge surfaces of the first wedge block 12 and the second wedge block 13 are opposite, and both can move horizontally. Among them, a limiting groove can be set at the bottom of the cavity of the first rod 81 to guide and limit the first wedge block 12 and the second wedge block 13. A clearance hole for the first wedge block 12 and the second wedge block 13 to pass through is opened on the side wall of the rotating rod 8. By designing the rotating rod 8 as a split first rod 81 and a second rod 82, the installation of the first wedge block 12 and the second wedge block 13 is facilitated.

[0049] A pneumatic cylinder 15 is installed at one end of the second rod 82 away from the first rod 81. The piston rod of the pneumatic cylinder 15 passes through the second rod 82 and is located between the first wedge block 12 and the second wedge block 13. The piston rod is movably arranged in the vertical direction. A pressure block 16 is fixedly connected to the piston rod, and the pressure block 16 is used to press on the wedge surfaces of the first wedge block 12 and the second wedge block 13.

[0050] The cross section of the support seat 6 is rectangular and larger than the cross section of the rotating rod 8. A through hole is formed on the support seat 6, and the through hole is used to pass the pneumatic cylinder 15 and the rotating rod 8. When the support seat 6 passes through the pneumatic cylinder 15, the second rod 82 and the first rod 81 in sequence and contacts the rotating seat 4, the pneumatic cylinder 15 controls the first wedge block 12 and the second block to move away from each other, so that the first wedge block 12 and the second block are clamped in the groove 20 preset on the support seat 6, and the groove 20 preset on the support seat 6 is communicated with the through hole of the support seat 6.

[0051] Among them, the first wedge block 12 and the second wedge block 13 are both connected with a return spring 14, the elastic force direction of the return spring 14 is parallel to the moving direction of the first wedge block 12, the return springs 14 on the first wedge block 12 and the second wedge block 13 are both connected to the inner wall of the first rod 81, and the two return springs 14 are respectively used to control the reset of the first wedge block 12 and the second wedge block 13.

[0052] When installing the support seat 6, firstly, the support seat 6 is passed through the pneumatic cylinder 15 and the rotating rod 8 in sequence, and the support seat 6 is brought into contact with the rotating seat 4, at which point the support seat 6 cannot continue to move along the length direction of the rotating rod 8. Then, the piston rod of the pneumatic cylinder 15 is moved downward, and the pressing block 16 at the piston rod will press on the wedge surfaces of the first wedge block 12 and the second wedge block 13, so that the first wedge block 12 and the second wedge block 13 move away from each other, thereby allowing the first wedge block 12 and the second wedge block 13 to be clamped in the preset groove 20 on the support seat 6, and the support seat 6 is fixed on the rotating rod 8 by the limiting effect of the first wedge block 12 and the second wedge block 13.

[0053] When the first wedge block 12 and the second wedge block 13 move away from each other, the return spring 14 is deformed and compressed. When the support seat 6 is to be removed from the rotating rod 8, the control piston rod is moved in a direction away from the first wedge block 12 and the second wedge block 13. At this time, under the action of the return spring 14, the first wedge block 12 and the second wedge block 13 move horizontally, thereby automatically returning to their original position.

[0054] In addition, a second conveyor platform 17 is installed at the output end of the first conveyor platform 2, and a second conveyor belt 18 is rotatably connected to the second conveyor platform 17. The conveying direction of the second conveyor belt 18 is the same as that of the first conveyor belt 7, and the conveying surface of the second conveyor belt 18 is lower than that of the first conveyor belt 7. When the paper lunch boxes on the first conveyor belt 7 are stacked to a certain height, the first conveyor belt 7 is operated to start conveying the paper lunch boxes, so that the paper lunch boxes can be gradually transferred to the second conveyor belt 18, and then the staff stands at the end of the second conveyor belt 18 to perform quality inspection on the paper lunch boxes.

[0055] A scissor lift 19 is installed below the second conveyor platform 17, and the scissor lift 19 is used to control the up and down movement of the entire second conveyor platform 17. Since the first conveyor platform 2 is located at a higher position, the scissor lift 19 can control the up and down movement of the second conveyor platform 17. After the paper lunch box is transferred to the second conveyor belt 18, the second conveyor platform 17 can be controlled to move a certain distance in the direction close to the ground, so that the staff can better remove the paper lunch box from the second conveyor belt 18.

[0056] The implementation principle of a material discharge system for increasing the edge strength of a paper dinner plate according to an embodiment of the present application is as follows: after the paper dinner plate completes the molding process, the molding upper mold 1 is translated to the position directly above the rotating seat 4. At this time, the rotating seat 4 is first driven to rotate so that the suction cup 5 is adjusted to an upward state. Next, the suction cup 5 is driven to move upward by the lifting platform 3 so that the suction cup 5 adsorbs the paper dinner plate in the mold cavity. Subsequently, the lifting platform 3 is controlled to descend a certain distance to make room for the rotating seat 4 to rotate. After the rotating seat 4 rotates to the point where the suction cup 5 faces downward, the lifting platform 3 is continued to be controlled to descend, and at the same time, the suction force of the suction cup 5 on the paper dinner plate is cancelled. The paper dinner plate falls onto the first conveyor belt 7 under the action of gravity.

[0057] Based on the above embodiment, the embodiment of the present application further provides a method for increasing the edge strength of a paper dinner plate, wherein the paper dinner plate is fed using the feeding system of the above structure, specifically comprising the following steps: S1. After the paper lunch box is formed, the lifting platform 3 is controlled to move vertically upward and close to the upper forming mold 1, and then the suction cup 5 is used to suck the paper lunch box in the cavity; S2, then control the lifting platform 3 to move vertically downward, and at the same time operate the rotating seat 4 to rotate, thereby driving the suction cup 5 and the paper lunch box to flip over, so that the opening of the paper lunch box faces upward; S3. When the lifting platform 3 approaches the first conveying platform 2, the suction cup 5 is controlled to remove the suction force on the paper lunch box, and the paper lunch box falls onto the first conveyor belt 7 under the action of its own gravity; this cycle is repeated so that the paper lunch boxes on the first conveyor belt 7 are stacked up and down.

[0058] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A feeding system for increasing the edge strength of a paper dinner plate, characterized in that: It comprises an upper molding die (1) and a lower molding die, wherein the upper molding die (1) and the lower molding die are opposed to each other in upper and lower directions and are used to mold a paper dinner plate, and the molded paper dinner plate has an opening facing downward and is located inside the upper molding die (1); The unloading system is used to flip the formed paper dinner plate, and the unloading system comprises a first conveying platform (2), a lifting platform (3), a rotating seat (4) and a plurality of suction cups (5); the first conveying platform (2) is rotatably connected to a first conveyor belt (7); the lifting platform (3) is located on one side of the first conveyor belt (7) and is movably arranged up and down; the rotating seat (4) is rotatably connected to the lifting platform (3) and is located above the first conveyor belt (7); the suction cups (5) are distributed on the rotating seat (4) at intervals and are used to absorb the paper dinner plate in the forming upper mold (1); It also comprises a plurality of support seats (6), wherein the support seats (6) are spaced apart along the length direction of the rotating seat (4), and a plurality of suction cups (5) are spaced apart on the support seats (6), and each of the suction cups (5) is located in the same plane; The support seat (6) is perpendicular to the rotating seat (4), and a rotating rod (8) is vertically arranged in the middle of the support seat (6), and the rotating rod (8) is rotatably connected to the rotating seat (4).

2. A feeding system for increasing the edge strength of a paper dinner plate according to claim 1, characterized in that: It also includes a linear cylinder (9), a rack (10) and a gear (11); the rack (10) is movably arranged along the length direction of the support seat (6); the linear cylinder (9) is connected to the rack (10) and is used to control the horizontal movement of the rack (10); the gear (11) is connected to the rotating rod (8) and meshes with the rack (10); the rack (10) is used to control the rotation of the gear (11); and the linear cylinder (9) has a self-locking function.

3. A feeding system for increasing the edge strength of a paper dinner plate according to claim 2, characterized in that: The rotating rod (8) passes through the rotating seat (4), and two ends of the rotating rod (8) are respectively connected to the gear (11) and the support seat (6), and the support seat (6) is detachably connected to the rotating rod (8); A first wedge block (12), a second wedge block (13) and a return spring (14) are provided inside the rotating rod (8); the wedge surfaces of the first wedge block (12) and the second wedge block (13) are opposite to each other and both are movably arranged; a clearance hole for the first wedge block (12) and the second wedge block (13) to pass through is opened on the side wall of the rotating rod (8); a pneumatic cylinder (15) is also installed on the rotating rod (8); the piston rod of the pneumatic cylinder (15) is located between the first wedge block (12) and the second wedge block (13) and moves up and down; The support seat (6) is provided with a through hole, the through hole being used to pass the rotating rod (8), and when the support seat (6) is in contact with the rotating seat (4), the pneumatic cylinder (15) controls the first wedge block (12) and the second wedge block (13) to move away from each other, and enables the first wedge block (12) and the second wedge block (13) to be engaged in a groove (20) preset on the support seat (6); The first wedge block (12) and the second wedge block (13) are both connected to the return spring (14), and the return spring (14) is used to control the return of the first wedge block (12) and the second wedge block (13).

4. A feeding system for increasing the edge strength of a paper dinner plate according to claim 1, characterized in that: The invention also comprises a second conveying platform (17), wherein the second conveying platform (17) is located at the output end of the first conveying platform (2), and a second conveying belt (18) is rotatably connected to the second conveying platform (17), wherein the conveying direction of the second conveying belt (18) is the same as that of the first conveying belt (7), and the conveying surface of the second conveying belt (18) is lower than the conveying surface of the first conveying belt (7).

5. A feeding system for increasing the edge strength of a paper dinner plate according to claim 4, characterized in that: It also comprises a scissor lift (19), the second conveying platform (17) being arranged on the scissor lift (19), and the scissor lift (19) being used to control the second conveying platform (17) to move up and down.

6. A feeding system for increasing the edge strength of a paper dinner plate according to claim 1, characterized in that: The suction cup (5) is made of elastic material.

7. A method for producing paper dinner plates using the blanking system according to any one of claims 1 to 6, characterized in that: The following steps are involved: S1. After the paper lunch box is formed, the lifting platform (3) is controlled to move upward and approach the forming upper mold (1), and then the suction cup (5) is used to suck the paper lunch box in the mold cavity; S2, then controlling the lifting platform (3) to move downward, and at the same time operating the rotating seat (4) to rotate, thereby driving the suction cup (5) and the paper lunch box to flip over, so that the opening of the paper lunch box faces upward; S3. When the lifting platform (3) approaches the first conveying platform (2), the suction cup (5) is controlled to remove the suction force on the paper lunch box, and the paper lunch box falls onto the first conveying belt (7) under the action of its own gravity; this cycle is repeated so that the paper lunch boxes on the first conveying belt (7) are stacked up and down.

Images