Paper tableware film covering device

Abstract

According to the paper tableware film covering device, a hydraulic rod drives a whole storage base to press downwards, so that a piston rod extrudes gas in a piston barrel, the gas rushes into an impact impeller from a gas inlet, the impeller drives a whole hot-pressing module to rotate, and the gas rushes into a gas gathering box through a gas outlet; part of the air flow impacts the cooling wheel and the film below through the hose II, the ring pipe and the air spraying pipe, the air spraying pipe rotates circumferentially, and the flowing sectional area of an outlet of the air spraying pipe is reduced, so that the air flow is accelerated and impacts the film below circumferentially, and the film is tightly pressed on the paper tableware until the cooling wheel and the hot pressing wheel are pressed on the film; and shaping the film.

Description

Technical Field

[0001] The present application relates to the technical field of tableware coating, and in particular to a paper tableware coating device. Background Art

[0002] After processing and production, paper tableware needs to be laminated and packaged so that the paper tableware can be protected by the coating, isolate external dirt, and keep the paper tableware clean. In order to improve the laminating efficiency, a common mechanical laminating device is needed.

[0003] The paper tableware laminating device mainly places the paper tableware to be laminated on a conveying device and transports it to a laminating box. A mold plate that matches the size of the paper tableware to be laminated is fixed in the laminating box (the size is generally larger than the size of the tableware to prevent the subsequent hot pressing plate from contacting the tableware and causing the tableware to deform due to heat or develop black spots). The film is sent into the laminating box through a mold roller. The film is located at the upper and lower ends of the paper tableware. At this time, a control device such as a control screw is used to press down the hot pressing plate, and after the upper and lower films are pressed and wrapped around the tableware, the hot pressing plate is lifted up, and the laminated tableware is sent away through a conveying device for subsequent cutting and separation.

[0004] In the above process, since the size of the mold plate is larger than the size of the tableware, the finished package is loose when the hot pressing plate is pressing the film, and there is still a lot of free space, which causes the tableware to move in the film packaging. At the same time, the hot pressing plate needs to go through a preheating stage and heat up to a preset temperature range. This temperature is usually lower than the melting temperature of the PLA film but higher than its softening temperature. Preheating helps the PLA film to gradually soften and prepare for the subsequent pressing process. When the hot pressing plate reaches the preset temperature, the PLA film is placed between the hot pressing plates for pressing. At this stage, the hot pressing plate may maintain a constant temperature. The degree or fine-tuning according to the process requirements, after the lamination is completed, the hot pressing plate is gradually cooled down so that the PLA film can gradually cool down and solidify, which helps to maintain the shape and dimensional stability after lamination. This process is very short and fast, generally within three seconds, which causes the hot pressing plate to maintain multiple short and fast temperature changes. This requires a sensitive temperature control system and efficient heating and cooling capabilities, which is a heavy burden on the entire device, often greatly reducing the service life of the hot pressing plate and the temperature control system. The hot pressing plate or the temperature control system is a large whole, and frequent replacement will also affect the processing cost. Summary of the invention

[0005] The present application proposes a paper tableware laminating device, which has the advantages of providing high-pressure and rapid airflow by pressing down on a storage seat, the high-pressure and rapid airflow impacting an impeller to cause the hot pressing module to rotate, the high-pressure and rapid airflow circumferentially impacting a film to press the film against the tableware, the torsion spring drives the hot pressing module to rotate so that the hot pressing wheel hot presses the film, the rotating cooling wheel and the impacting airflow cool and press the hot pressed film, and the hot pressing wheel and the cooling wheel are separated and will not change temperature rapidly, so as to solve the problems of rapid temperature change of the hot pressing plate of the existing tableware laminating device and the film being unable to adhere closely to the tableware.

[0006] To achieve the above-mentioned purpose, the present application adopts the following technical scheme: a paper tableware coating device, comprising a bottom plate and a storage seat above the bottom plate, the top of the bottom plate is provided with uniformly distributed piston rods, the bottom end of the storage seat is provided with uniformly distributed piston cylinders sleeved with the piston rods, an air passage connected to the piston cylinder is provided in the storage seat, which is used to provide a flow space for airflow when the storage seat moves up and down; a snap-fit ​​seat is provided in the center of the storage seat, a power chamber is provided in the snap-fit ​​seat, an air inlet and an air outlet are provided on both sides of the power chamber, and a hose I is provided between the air inlet and the air passage for transmitting high-pressure and rapid airflow. A hot pressing module is arranged in the snap-fit ​​seat; the hot pressing module comprises a central shaft arranged in the center of the snap-fit ​​seat, an impeller is sleeved on the central shaft, the impeller is sleeved in the power chamber, and is used to receive the power of the airflow impact to drive the entire hot pressing module to rotate, and evenly distributed connecting rods are arranged at the bottom of the central shaft, an annular tube is arranged on the outer side of the connecting rod, a connecting plate is arranged at the bottom of the annular tube, the bottom end of the connecting plate is connected to a mounting seat, and a cooling wheel and a hot pressing wheel are arranged at the bottom of the mounting seat for hot pressing and cooling the film; a torsion spring connected to the snap-fit ​​seat is arranged at the top of the central shaft, and is used to provide power for the rotation of the hot pressing template.

[0007] Preferably, a one-way valve is provided at the top of the storage seat, and the one-way valve is connected to the airway for replenishing gas into the piston cylinder when the storage seat is lifted.

[0008] Preferably, a hydraulic rod is provided at the top of the snap-fit ​​seat to drive the entire storage seat and the hot pressing module to perform up and down reciprocating motion.

[0009] Preferably, the impeller includes an inner ring whose center is sleeved with the central axis and blades evenly distributed on the outside of the inner ring, the bottom and top ends of the inner ring are in contact with the bottom and top ends of the power chamber respectively, and the top and bottom ends of the blades are close to the top and bottom ends of the power chamber respectively, so as to maintain the stability of the hot pressing module and receive the impact of the airflow.

[0010] Preferably, the hot pressing wheel includes an inner wheel and an outer wheel plate sleeved on the outer side of the inner wheel. The cooling wheel and the inner wheel are respectively provided with axles in the center. The axles are movably sleeved with the mounting seat to provide support for the rotation of the hot pressing wheel and the cooling wheel.

[0011] Preferably, an annular groove is provided on the circumferential outer side of the inner wheel, a heating wire is arranged in the annular groove, and an electric slip ring is provided at one end of the wheel axle connected to the inner wheel and electrically connected to the heating wire for continuously providing heating current to the heating wire.

[0012] Preferably, a gas collecting box connected to the gas outlet is provided on one side of the top of the snap-fit ​​seat for receiving the high-pressure fast gas output from the power chamber, and an elastic membrane is provided in the gas collecting box for deforming and storing energy when receiving the gas.

[0013] Preferably, a hose II is provided on the ring tube and connected to the gas collection box, and the top of the hose II is close to the gas outlet for receiving the impact of high-pressure fast gas for deflection.

[0014] Preferably, evenly distributed jet pipes are provided at the bottom of the annular tube, the bottom ends of the jet pipes penetrate through the mounting seat to the top of the cooling wheel, and the bottom ends of the jet pipes are flat, and the bottom ends of the jet pipes are close to the center of the mounting seat, for outputting airflow to compress the film and cool the cooling wheel and the film.

[0015] The present application provides a paper tableware coating device, which drives the entire storage seat to be pressed down by a hydraulic rod, so that the piston rod squeezes the gas in the piston cylinder and rushes into the impact impeller from the air inlet, so that the impeller drives the entire hot pressing module to rotate and rushes into the air collecting box through the air outlet. A part of the airflow will pass through the hose II, the ring pipe and the jet pipe to impact the cooling wheel and film below. Since the jet pipe rotates circumferentially and the outlet flow cross-sectional area of ​​the jet pipe is reduced, the airflow is accelerated and circumferentially impacts the film below, so that the film is pressed tightly on the paper tableware until the cooling wheel and the hot pressing wheel are pressed on the film to shape the film.

[0016] At the same time, when the gas enters the air inlet and impacts the impeller to drive the hot pressing module to rotate, it will drive the torsion spring to store energy. After the cooling wheel and the hot pressing wheel are pressed on the film, the storage seat will no longer move down. At this time, the impeller loses the subsequent gas impact, and the torsion spring will drive the entire hot pressing module to rotate, so that the hot pressing wheel follows the rotation and contacts the film, softens the film, and is pressed against the film below by force. The cooling wheel rotating at the rear will contact the hot-pressed film for rapid cooling and solidification. During this process, the gas retained in the gas collection box will be squeezed by the elastic membrane and sprayed toward the cooling wheel through the jet pipe again, so that the cooling wheel is cooled by the airflow and maintains a low temperature state. During this process, the cooling wheel will rotate, so that the position of the cooling wheel contacting the film is always changing, and the part that has contacted the film will also be directly contacted with the impact cooling of the airflow ejected from the jet pipe during rotation, thereby ensuring the rapid cooling effect of the cooling wheel. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The accompanying drawings, which constitute a part of the specification, illustrate embodiments disclosed in the present application and, together with the description, serve to explain the principles disclosed in the present application.

[0018] The present application can be more clearly understood from the following detailed description with reference to the accompanying drawings, in which: Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention; Figure 2 This is a schematic diagram of the internal structure distribution of the present invention; Figure 3 It is a schematic diagram of the distribution of the cooling wheel and the hot pressing wheel of the present invention; Figure 4 It is a schematic diagram of the hot pressing wheel structure of the present invention.

[0019] Among them: 1. bottom plate; 2. piston rod; 3. storage seat; 31. air duct; 32. one-way valve; 4. piston cylinder; 5. hose I; 6. snap-fit ​​seat; 61. air inlet; 62. air outlet; 7. air collecting box; 8. elastic membrane; 9. hydraulic rod; 10. center axis; 101. torsion spring; 11. impeller; 12. connecting rod; 13. ring pipe; 14. connecting plate; 15. mounting seat; 16. hose II; 17. jet pipe; 18. wheel axle; 19. cooling wheel; 20. inner wheel; 21. ring groove; 22. electric slip ring; 23. heating wire; 24. outer wheel plate. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions 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. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0021] Embodiment 1 See also Figure 1 to Figure 2A paper tableware coating device comprises a bottom plate 1, the top of the bottom plate 1 is fixedly connected with uniformly distributed piston rods 2, a storage seat 3 is arranged above the bottom plate 1, the bottom end of the storage seat 3 is fixedly connected with uniformly distributed piston cylinders 4, the top of the piston rod 2 is movably sleeved in the piston cylinder 4, so that the piston rod 2 limits the moving direction of the piston cylinder 4, and provides stable support for the up and down movement of the storage seat 3, the outer wall of the piston rod 2 is in contact with the inner wall of the piston cylinder 4, so that the gas in the piston cylinder 4 will not leak through the opening at the bottom, and an airway 31 is opened in the storage seat 3, and the top of the piston cylinder 4 The end opening is connected with the air passage 31, so that when the storage seat 3 drives the piston cylinder 4 to move downward, the piston rod 2 moves upward relative to the piston cylinder 4, so that the piston rod 2 can press the gas in the piston cylinder 4 into the air passage 31, and the top of the storage seat 3 is fixedly connected with a one-way valve 32, and the one-way valve 32 is connected with the air passage 31, so that when the storage seat 3 drives the piston cylinder 4 to move upward, the piston rod 2 moves downward relative to the piston cylinder 4. At this time, the piston rod 2 performs a suction movement in the piston cylinder 4, causing the one-way valve 32 to open, and the external gas is introduced into the air passage 31 and then sucked into the piston cylinder 4.

[0022] See also Figure 1 to Figure 2 , the storage seat 3 is penetrated from top to bottom, and the center of the storage seat 3 is fixedly sleeved with a snap-fit ​​seat 6 by bolts, so that the snap-fit ​​seat 6 is easy to disassemble and the damaged parts inside can be quickly replaced. The top of the snap-fit ​​seat 6 is fixedly connected with a hydraulic rod 9 by bolts, so that the hydraulic rod 9 can drive the storage seat 3 to move up and down through the snap-fit ​​seat 6 under the drive of the existing hydraulic system. A power chamber is opened in the top of the snap-fit ​​seat 6, and an air inlet 61 is opened on one side of the power chamber, and an air outlet 62 is opened on the other side. The air inlet 61 is fixed away from the opening of the power chamber A hose Ⅰ5 is connected, and one end of the hose Ⅰ5 away from the air inlet 61 is fixedly connected to the air channel 31, so that after the piston rod 2 presses the gas in the piston cylinder 4 into the air channel 31, the gas can gather in the hose Ⅰ5, quickly rush into the air inlet 61, and be discharged from the air outlet 62 after reaching the power chamber. It should be noted that due to the fast downward pressure speed of the storage seat 3 (usually only within a few seconds), a large amount of gas is squeezed into the air channel 31 in a short time, and then quickly gathered in the hose Ⅰ5, forming high-pressure gas that quickly rushes into the air inlet 61.

[0023] See also Figure 2The center of the buckle seat 6 is movably sleeved with a central shaft 10, and the top outer side of the central shaft 10 is fixedly sleeved with an impeller 11. The impeller 11 includes an inner ring whose center is fixedly sleeved with the central shaft 10 and blades evenly distributed on the outer side of the inner ring. The impeller 11 is movably sleeved in the power cavity, and the bottom and top ends of the inner ring are respectively in contact with the bottom and top ends of the power cavity, so that the inner ring stabilizes the entire hot pressing module in the buckle seat 6. When the buckle seat 6 follows the storage seat 3 to perform up and down reciprocating motion, the entire hot pressing module can be driven to move synchronously through the inner ring, and the top ends of the blades of the impeller 11 are in contact with the power cavity. The top of the power chamber is close, the bottom end of the blades of the impeller 11 is close to the bottom end of the power chamber, and the top outer side of the central shaft 10 is movably sleeved with a torsion spring 101 connected to the bottom end of the inner cavity of the snap-fit ​​seat 6, so that the high-pressure fast gas entering the air inlet 61 can impact on the blades, drive the impeller 11 to rotate and then be discharged from the air outlet 62, thereby driving the entire hot pressing module to rotate with the center of the central shaft 10 as the base point. At this time, the torsion spring 101 will twist and store energy. When the subsequent impact airflow disappears, the stored energy torsion spring 101 can drive the entire hot pressing module to rotate and reset.

[0024] See also Figures 2 to 3 The bottom outer side of the central axis 10 protruding out of the buckle seat 6 is fixedly connected with a uniformly distributed connecting rod 12, and the end of the connecting rod 12 away from the central axis 10 is fixedly connected with an annular tube 13, and the bottom of the annular tube 13 is fixedly connected with a uniformly distributed connecting plate 14, and the bottom end of the connecting plate 14 is welded with a mounting seat 15, and the bottom of the mounting seat 15 is movably connected with a cooling wheel 19 and a hot pressing wheel, so that when the storage seat 3 moves downward, the cooling wheel 19 and the hot pressing wheel can be driven to move downward synchronously through the buckle seat 6. At the same time, the central axis 10 will also drive the cooling wheel 19 and the hot pressing wheel to rotate synchronously. When the cooling wheel 19 and the hot pressing wheel are pressed on the film, they will no longer move downward. At this time, the subsequent high The compressed gas no longer provides the power for rotation, so that the torsion spring 101 drives the cooling wheel 19 and the hot pressing wheel to rotate circumferentially, thereby making the hot pressing wheel soften the film and press it together. The subsequent cooling wheel 19 will cool the pressed film. In this process, the hot pressing wheel and the cooling wheel 19 will rotate under the friction force, so that the contact point of the hot pressing wheel and the cooling wheel 19 with the film is in a constant change. The cooling wheel 19 always maintains a relatively low temperature state, while the hot pressing wheel always maintains a relatively high temperature state. There is no need for short-term temperature change operation, which reduces the cost of temperature control and avoids damage caused by multiple temperature changes in a short period of time.

[0025] See also Figures 2 to 4The hot pressing wheel includes an inner wheel 20 and an outer wheel plate 24 fixedly sleeved on the outer side of the inner wheel 20 by bolts, so that the outer wheel plate 24 can be quickly replaced after being damaged. The centers of the cooling wheel 19 and the inner wheel 20 are respectively fixedly sleeved with axles 18, and the axles 18 are movably sleeved with the mounting seat 15, so that the hot pressing wheel and the cooling wheel 19 can rotate around the axles 18 as the center. An annular groove 21 is provided on the circumferential outer side of the inner wheel 20, and a heating wire 23 is fixedly sleeved in the annular groove 21. One end of the axle 18 connected to the inner wheel 20 is fixedly connected with an electric slip ring 22, one end of the electric slip ring 22 is electrically connected to the heating wire 23, and the other end is electrically connected to the external circuit. When the hot pressing wheel is rotating, it can still obtain current through the electric slip ring 22, so that the heating wire 23 is in a starting state to maintain the temperature of the hot pressing wheel.

[0026] Embodiment 2 See also Figure 1 to Figure 2 On the basis of the first embodiment, a gas gathering box 7 is fixedly connected to one side of the top of the snap-fit ​​seat 6, and the gas gathering box 7 is connected to the gas outlet 62. The gas outlet 62 is close to the top of the gas gathering box 7, so that the high-pressure fast gas in the power cavity can rush into the gas gathering box 7 through the gas outlet 62. An elastic membrane 8 is fixedly sleeved in the gas gathering box 7, and the elastic membrane 8 divides the inner cavity of the gas gathering box 7 into two isolated chambers, so that the high-pressure fast gas rushing into the gas gathering box 7 can impact the elastic membrane 8, causing the elastic membrane 8 to expand in the direction away from the gas outlet 62, thereby increasing the space between the elastic membrane 8 and the gas outlet 62, and providing a larger retention space for the rushing gas.

[0027] See also Figure 2 , a hose II 16 is fixedly connected to the annular tube 13, and the other end of the hose II 16 passes through the snap-fit ​​seat 6 and the gas gathering box 7 to the gas gathering box 7, so that the high-pressure gas in the gas gathering box 7 can rush into the annular tube 13 through the hose II 16, and the top of the hose II 16 is close to the gas outlet 62, so that the high-pressure fast gas rushing out of the gas outlet 62 can impact the top of the hose II 16, causing the top of the hose II 16 to be deflected to the side of the elastic membrane 8, so that the flow cross-sectional area of ​​the deflected part of the hose II 16 is reduced, and the flow speed of the airflow here is accelerated. Due to the existence of the elastic membrane 8, the space between the elastic membrane 8 and the gas outlet 62 can be changed, so that only a part of the high-pressure gas in the space here can reach the annular tube 13 at the deflected part synchronously, so that a large amount of high-pressure gas can remain in the space here, when the subsequent high-pressure gas stops supplying, the deflected part of the hose II 16 will recover under its own elastic force, and at this time the expanded elastic membrane 8 will squeeze the retained gas into the annular tube 13 through the hose II 16, and at this time the hot pressing module is in a rotating state.

[0028] See also Figures 2 to 3The bottom of the annular tube 13 is fixedly connected with uniformly distributed jet pipes 17. The bottom ends of the jet pipes 17 penetrate the mounting seat 15 to the top of the cooling wheel 19, and the bottom ends of the jet pipes 17 are flat. The bottom ends of the jet pipes 17 are close to the center of the mounting seat 15, so that the high-pressure fast gas in the annular tube 13 can be sprayed to the cooling wheel 19 below through the jet pipes 17, and rush to the film below along the circumferential surface of the cooling wheel 19. Since the jet pipes 17 rotate circumferentially and the outlet flow cross-sectional area of ​​the jet pipes 17 is reduced, the airflow is accelerated, and the circumferential impact is on the film below. The film is pressed tightly against the paper tableware until the cooling wheel 19 and the hot pressing wheel are pressed against the film to shape the film. When the cooling wheel 19 extrude and cool the pressed film, the part of the rotating cooling wheel 19 that contacts the film will be directly impacted and cooled by the cooling airflow ejected from the jet pipe 17 during the rotation, so that the heated part of the cooling wheel 19 can be quickly cooled and the next round of film cooling can be carried out. During this process, the cooling airflow will still impact the film pressed by the hot pressing wheel for airflow impact cooling.

Claims

1. A paper tableware laminating device, characterized in that: include: A bottom plate (1) with a piston rod (2) disposed on the top; A storage seat (3) is arranged above the bottom plate (1), and a piston cylinder (4) is evenly distributed and sleeved with the piston rod (2) at the bottom end of the storage seat (3). An air passage (31) connected to the piston cylinder (4) is provided in the storage seat (3) to provide a flow convergence space for airflow when the storage seat (3) moves up and down; A snap-fit ​​seat (6) is arranged at the center of the storage seat (3), and a power chamber is provided inside. An air inlet (61) and an air outlet (62) are respectively provided on two sides of the power chamber. A hose I (5) is provided between the air inlet (61) and the air passage (31) for transmitting high-pressure rapid airflow. A hot pressing module is provided inside the snap-fit ​​seat (6); The hot pressing module comprises a central axis (10) arranged at the center of the snap-fit ​​seat (6), and a torsion spring (101) is connected between the top and the snap-fit ​​seat (6) for driving the hot pressing module to rotate; An impeller (11) is sleeved on the central shaft (10) and is located in the power chamber, and is used to receive the impact of the airflow to drive the hot pressing module to rotate; Connecting rods (12) are evenly distributed at the bottom of the central axis (10) and are provided with an annular tube (13) on the outside; The mounting seat (15) is connected to the ring tube (13) by a connecting plate (14), and a cooling wheel (19) and a hot pressing wheel are provided at the bottom thereof for hot pressing and cooling the film.

2. A paper tableware coating device according to claim 1, characterized in that: A one-way valve (32) is provided at the top end of the storage seat (3), and the one-way valve (32) is connected to the air passage (31) and is used to replenish gas into the piston cylinder (4) when the storage seat (3) is lifted.

3. The paper tableware coating device according to claim 1, characterized in that: A hydraulic rod (9) is provided at the top end of the snap-fit ​​seat (6) for driving the entire storage seat (3) and the hot pressing module to perform up and down reciprocating motion.

4. The paper tableware laminating device according to claim 1, characterized in that: The impeller (11) comprises an inner ring whose center is sleeved with the central axis (10) and blades evenly distributed outside the inner ring, the bottom end and the top end of the inner ring are in contact with the bottom end and the top end of the power chamber respectively, and the top end and the bottom end of the blades are close to the top end and the bottom end of the power chamber respectively, so as to maintain the stability of the hot pressing module and receive the impact of the airflow.

5. The paper tableware coating device according to claim 1, characterized in that: The hot pressing wheel comprises an inner wheel (20) and an outer wheel plate (24) sleeved on the outer side of the inner wheel (20); a wheel axle (18) is respectively arranged at the center of the cooling wheel (19) and the inner wheel (20); the wheel axle (18) is movably sleeved on the mounting seat (15) to provide support for the hot pressing wheel and the cooling wheel (19) to rotate.

6. A paper tableware coating device according to claim 5, characterized in that: An annular groove (21) is provided on the circumferential outer side of the inner wheel (20), a heating wire (23) is arranged in the annular groove (21), and an electric slip ring (22) is provided at one end of the wheel axle (18) connected to the inner wheel (20) and is electrically connected to the heating wire (23) for continuously providing heating current to the heating wire (23).

7. The paper tableware coating device according to claim 1, characterized in that: A gas collecting box (7) connected to the gas outlet (62) is arranged on one side of the top of the snap-fit ​​seat (6) for receiving high-pressure fast gas output from the power chamber. An elastic membrane (8) is arranged inside the gas collecting box (7) for deforming and storing energy when receiving gas.

8. The paper tableware coating device according to claim 7, characterized in that: The annular tube (13) is provided with a hose II (16) which is connected to the gas collecting box (7). The top of the hose II (16) is close to the gas outlet (62) and is used to receive the impact of high-pressure fast gas for deflection.

9. The paper tableware coating device according to claim 8, characterized in that: The bottom of the annular tube (13) is provided with uniformly distributed jet pipes (17), the bottom ends of the jet pipes (17) penetrate the mounting seat (15) to the top of the cooling wheel (19), and the bottom ends of the jet pipes (17) are flat, and the bottom ends of the jet pipes (17) are close to the center of the mounting seat (15), and are used to output airflow to compress the film and cool the cooling wheel (19) and the film.

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