A paper tableware film laminating device

Abstract

The present application discloses a film laminating device for paper tableware. The entire placement seat is pressed down by a hydraulic rod, causing the piston rod to squeeze the gas in the piston cylinder, which rushes into the impact impeller from the air inlet, causing the impeller to drive the entire hot pressing module to rotate self - clockwise, and then rushes into the air - collecting box through the air outlet. A part of the air flow will impact the cooling wheel and the film below through the hose II, the annular pipe and the air jet pipe. Since the air jet pipe rotates circumferentially and the cross - sectional area of the outlet of the air jet pipe decreases, the air flow is accelerated and impacts the film below circumferentially, causing the film to be tightly pressed on the paper tableware until the cooling wheel and the hot pressing wheel press on the film to shape the film.

Description

Technical Field

[0001] This application relates to the technical field of tableware film coating, and particularly relates to a paper tableware film coating device. Background Art

[0002] After the production of paper tableware, it needs to be film-coated and packed to protect the paper tableware with a film, isolate external dirt, and keep the paper tableware clean. In order to improve the film coating efficiency, a common mechanical film coating device is required.

[0003] For a paper tableware film coating device, the paper tableware to be film-coated is mainly placed on a conveying device and transported into a film coating box. A mold plate that conforms to the size of the paper tableware to be film-coated is fixed in the film coating box (generally, the size is larger than the tableware size to avoid the tableware being deformed by heat or having black spots when the hot pressing plate contacts the tableware later). The film is sent into the film coating box through a die 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 lead screw is used to press down the hot pressing plate. After the film on the upper and lower sides is pressed and wrapped around the tableware, the hot pressing plate is lifted, and the film-coated tableware is sent away through the conveying device for subsequent cutting and separation.

[0004] In the above process, since the size of the mold plate is larger than the tableware size, when the hot pressing plate presses the film, the packaged finished product is loose and there is still a lot of free space, resulting in the movement of the tableware in the film packaging. At the same time, the hot pressing plate needs to go through a preheating stage to rise 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 gradually soften and prepares 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. In this stage, the hot pressing plate may maintain a constant temperature or be finely adjusted according to process requirements. After the pressing is completed, the hot pressing plate gradually cools down so that the PLA film can gradually cool and solidify, which helps to maintain the shape and size stability after pressing. This process is very short and fast, generally within three seconds. This results in the hot pressing plate needing to maintain the ability to change temperature multiple times briefly and quickly, which requires a sensitive temperature control system and efficient heating and cooling capabilities. This places a great burden on the entire device and often greatly reduces the service life of the hot pressing plate and the temperature control system. And 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 provides a film laminating device for paper tableware, which has the advantages that the placing seat presses down to provide high-pressure and fast airflow, the high-pressure and fast airflow impacts the impeller to make the hot pressing module rotate self, the high-pressure and fast airflow impacts the film circumferentially to make the film press tightly against the tableware, the torsion spring drives the hot pressing module to rotate back so that the hot pressing wheel hot-presses the film, the rotating cooling wheel and the impact airflow cool and press the hot-pressed film, and the hot pressing wheel and the cooling wheel are separated without rapid temperature change, so as to solve the problems of rapid temperature change of the hot pressing plate and the film not being able to closely adhere to the tableware in the existing tableware film laminating device.

[0006] To achieve the above object, the present application adopts the following technical solutions: A film laminating device for paper tableware, including a bottom plate and a placing seat above the bottom plate. The top end of the bottom plate is provided with evenly distributed piston rods, and the bottom end of the placing seat is provided with evenly distributed piston cylinders sleeved with the piston rods. An air passage communicating with the piston cylinder is opened in the placing seat for providing a flowing space for the airflow when the placing seat moves up and down. A fastening seat is arranged at the center of the placing seat, a power chamber is opened in the fastening seat, an air inlet and an air outlet are respectively opened on both sides of the power chamber, and a hose I is arranged between the air inlet and the air passage for transmitting high-pressure and fast airflow. A hot pressing module is arranged in the fastening seat. The hot pressing module includes a central shaft arranged at the center of the fastening seat, an impeller is sleeved on the central shaft, the impeller is sleeved in the power chamber for receiving the power of the airflow impact to drive the whole hot pressing module to rotate self, evenly distributed connecting rods are arranged at the bottom of the central shaft, a ring pipe is arranged outside the connecting rods, a connecting plate is arranged at the bottom of the ring pipe, and the bottom end of the connecting plate is connected with a mounting seat. 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 connecting with the fastening seat is arranged at the top of the central shaft for providing the power for the hot pressing template to rotate back.

[0007] Preferably, a one-way valve is arranged at the top end of the placing seat, and the one-way valve is communicated with the air passage for supplementing gas into the piston cylinder when the placing seat is lifted.

[0008] Preferably, a hydraulic rod is arranged at the top end of the fastening seat for driving the whole placing seat and the hot pressing module to move up and down reciprocally.

[0009] Preferably, the impeller includes an inner ring sleeved with the central shaft at the center and evenly distributed blades outside the inner ring. The bottom end and the top end of the inner ring are respectively in contact with the bottom end and the top end of the power chamber, and the top end and the bottom end of the blades are respectively close to the top end and the bottom end of the power chamber for keeping the stability of the hot pressing module and receiving the impact of the airflow.

[0010] Preferably, the hot pressing wheel includes an inner wheel and an outer pasting wheel plate sleeved outside the inner wheel. Wheel shafts are respectively arranged at the centers of the cooling wheel and the inner wheel, and the wheel shafts are movably sleeved with the mounting seat for providing the support for the self-rotation of the hot pressing wheel and the cooling wheel.

[0011] Preferably, a ring groove is formed on the circumferential outer side of the inner wheel, and a heating wire is arranged in the ring groove. One end of the wheel shaft connected to the inner wheel is provided with a slip ring electrically connected to the heating wire for continuously supplying heating current to the heating wire.

[0012] Preferably, a gas collecting box communicating with the air outlet is arranged on one side of the top of the buckling seat for receiving the high-pressure and fast gas output from the power chamber. An elastic membrane is arranged in the gas collecting box for deforming to complete energy storage when receiving gas.

[0013] Preferably, a hose II is arranged on the ring pipe and communicated with the inside of the gas collecting box. The top of the hose II is close to the air outlet for receiving the impact of the high-pressure and fast gas and deflecting.

[0014] Preferably, uniformly distributed jet pipes are arranged at the bottom of the ring pipe. The bottom ends of the jet pipes penetrate through the mounting seat to the upper side of the cooling wheel, and the bottom ends of the jet pipes are flat. The bottom ends of the jet pipes are close to the center of the mounting seat for outputting air flow to press the film and cooling the cooling wheel and the film.

[0015] A paper tableware film covering device provided by the present application drives the entire placing seat to press down through a hydraulic rod, so that the piston rod extrudes the gas in the piston cylinder, rushes into the impact impeller from the air inlet, makes the impeller drive the entire hot pressing module to rotate self, and rushes into the gas collecting box through the air outlet. A part of the air flow will impact the cooling wheel and the film below through the hose II, the ring pipe and the jet pipe. Since the jet pipe rotates circumferentially and the flow cross-sectional area of the outlet of the jet pipe decreases, the air flow is accelerated, and the film below is impacted circumferentially, so that the film is tightly pressed on the paper tableware until the cooling wheel and the hot pressing wheel are pressed on the film to shape the film.

[0016] Meanwhile, when the gas enters from the air inlet and impacts the impeller to drive the hot pressing module to rotate self, the torsion spring will be driven to store energy. After the cooling wheel and the hot pressing wheel are pressed on the film, the placing 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 back, so that the hot pressing wheel rotates back to contact the film, softens the film, and presses and combines with the film below under force. The cooling wheel rotating back later will contact the hot-pressed film for rapid cooling and solidification. During this process, the gas remaining in the gas collecting box will be sprayed to the cooling wheel again through the jet pipe under the extrusion of the elastic membrane, so that the cooling wheel obtains air flow cooling and maintains a low temperature state. During this process, the cooling wheel will rotate self, so that the position where the cooling wheel contacts the film is always changing, and the part that has contacted the film will also directly contact the impact cooling of the air flow sprayed by the jet pipe during the rotation, ensuring the rapid cooling effect of the cooling wheel. Description of the Drawings

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

[0018] Referring to the accompanying drawings, the present application can be more clearly understood according to the following detailed description, wherein:

[0019] Figure 1 It is a three-dimensional structure schematic diagram of the present invention;

[0020] Figure 2 It is a schematic diagram of the internal structure distribution of the present invention;

[0021] Figure 3 It is a schematic diagram of the distribution of the cooling wheel and the hot pressing wheel of the present invention;

[0022] Figure 4 It is a schematic diagram of the structure of the hot pressing wheel of the present invention.

[0023] Wherein: 1. bottom plate; 2. piston rod; 3. placing seat; 31. air duct; 32. one-way valve; 4. piston cylinder; 5. hose I; 6. buckling seat; 61. air inlet; 62. air outlet; 7. air collecting box; 8. elastic membrane; 9. hydraulic rod; 10. central shaft; 101. torsion spring; 11. impeller; 12. connecting rod; 13. annular pipe; 14. connecting plate; 15. mounting seat; 16. hose II; 17. jet pipe; 18. wheel shaft; 19. cooling wheel; 20. inner wheel; 21. annular groove; 22. electric slip ring; 23. heating wire; 24. outer attached wheel plate. Specific Embodiments

[0024] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present application without creative efforts shall fall within the protection scope of the present application.

[0025] Embodiment 1

[0026] Please refer to Figures 1 to 2, A paper tableware film laminating device, including a bottom plate 1. The top end of the bottom plate 1 is fixedly connected with evenly distributed piston rods 2. Above the bottom plate 1, there is a placement seat 3. The bottom end of the placement seat 3 is fixedly connected with evenly 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 restricts the moving direction of the piston cylinder 4 and provides stable support for the up and down movement of the placement seat 3. The outer side wall of the piston rod 2 is in contact with the inner side wall of the piston cylinder 4, so that the gas in the piston cylinder 4 will not leak through the opening at the bottom end. An air passage 31 is opened in the placement seat 3. The top opening of the piston cylinder 4 is connected to the air passage 31. When the placement 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. The top end of the placement seat 3 is fixedly connected with a one-way valve 32, and the one-way valve 32 is connected to the air passage 31. When the placement 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 makes a suction movement in the piston cylinder 4, causing the one-way valve 32 to open, and introducing the outside gas into the air passage 31 and then being sucked into the piston cylinder 4.

[0027] Refer to Figures 1 to 2 , The placement seat 3 penetrates up and down. The center of the placement seat 3 is fixedly sleeved with a fastening seat 6 through bolts, making the fastening seat 6 easy to disassemble and enabling quick replacement of damaged internal parts. The top end of the fastening seat 6 is fixedly connected with a hydraulic rod 9 through bolts, so that under the drive of the existing hydraulic system, the hydraulic rod 9 can drive the placement seat 3 to move up and down through the fastening seat 6. A power chamber is opened inside the top of the fastening seat 6. 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 opening of the air inlet 61 away from the power chamber is fixedly connected with a hose I 5. The end of the hose I 5 away from the air inlet 61 is fixedly connected to the air passage 31. After the piston rod 2 presses the gas in the piston cylinder 4 into the air passage 31, the gas can gather in the hose I 5 and quickly rush into the air inlet 61, and then discharge from the air outlet 62 after reaching the power chamber. It should be noted that due to the fast downward pressure speed of the placement seat 3 (usually only within a few seconds), a large amount of gas is quickly squeezed into the air passage 31 in a short time, and then quickly gathers in the hose I 5, forming high-pressure gas that quickly rushes into the air inlet 61.

[0028] Refer to Figure 2, a central shaft 10 is movably sleeved in the center of the fastening seat 6. An impeller 11 is fixedly sleeved on the outer side of the top of the central shaft 10. The impeller 11 includes an inner ring fixedly sleeved with the central shaft 10 at the center and blades evenly distributed on the outer side of the inner ring. The impeller 11 is movably sleeved in the power chamber. The bottom end and the top end of the inner ring are respectively in contact with the bottom end and the top end of the power chamber, so that the inner ring stabilizes the entire hot pressing module in the fastening seat 6. When the fastening seat 6 moves up and down reciprocally following the placement seat 3, the entire hot pressing module can be driven to move synchronously through the inner ring. The top ends of the blades of the impeller 11 are close to the top end of the power chamber, and the bottom ends of the blades of the impeller 11 are close to the bottom end of the power chamber. A torsion spring 101 connected to the bottom end of the inner cavity of the fastening seat 6 is movably sleeved on the outer side of the top of the central shaft 10. The high-pressure and fast gas entering from the air inlet 61 can impact on the blades, drive the impeller 11 to rotate and then discharge from the air outlet 62, thereby driving the entire hot pressing module to rotate around the center of the central shaft 10. At this time, the torsion spring 101 will be twisted to store energy. When the subsequent impact air flow disappears, the energy-storing torsion spring 101 can drive the entire hot pressing module to rotate back to its original position.

[0029] Refer to Figures 2 to 3 , a uniformly distributed connecting rod 12 is fixedly connected to the outer side of the bottom of the central shaft 10 protruding from the fastening seat 6. One end of the connecting rod 12 far from the central shaft 10 is fixedly connected to a ring pipe 13. A uniformly distributed connecting plate 14 is fixedly connected to the bottom of the ring pipe 13. A mounting seat 15 is welded to the bottom end of the connecting plate 14. A cooling wheel 19 and a hot pressing wheel are movably connected to the bottom of the mounting seat 15. When the placement seat 3 moves downward, the fastening seat 6 can drive the cooling wheel 19 and the hot pressing wheel to move downward synchronously. At the same time, the central shaft 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 press on the film, they will no longer move downward. At this time, the subsequent high-pressure 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 softening the film by the hot pressing wheel and performing pressing. The subsequent cooling wheel 19 will cool the pressed film. During this process, the hot pressing wheel and the cooling wheel 19 will rotate under the action of friction, so that the points of the hot pressing wheel and the cooling wheel 19 in contact with the film are constantly changing. The cooling wheel 19 always maintains a relatively low temperature state, while the hot pressing wheel always maintains a relatively high temperature state, eliminating the need for short-time temperature change operations, reducing the cost of temperature control, and avoiding damage caused by multiple temperature changes in a short time.

[0030] Refer to Figures 2 to 4, the hot press wheel includes an inner wheel 20 and an outer attaching wheel plate 24 fixedly sleeved outside the inner wheel 20 through bolts, enabling the outer attaching wheel plate 24 to be quickly replaced after being damaged. Shafts 18 are fixedly sleeved at the centers of the cooling wheel 19 and the inner wheel 20 respectively, and the shafts 18 are movably sleeved with the mounting seat 15, enabling both the hot press wheel and the cooling wheel 19 to rotate around the shaft 18 as the center. A ring groove 21 is formed on the circumferential outer side of the inner wheel 20, and a heating wire 23 is fixedly sleeved in the ring groove 21. One end of the shaft 18 connected to the inner wheel 20 is fixedly connected with a slip ring 22. One end of the slip ring 22 is electrically connected to the heating wire 23, and the other end is electrically connected to an external circuit. When the hot press wheel rotates, it can still obtain current through the slip ring 22, enabling the heating wire 23 to be in the starting state and maintaining the temperature of the hot press wheel.

[0031] Embodiment 2

[0032] Please refer to Figures 1 to 2 , on the basis of Embodiment 1, a gas-gathering box 7 is fixedly connected to one side of the top of the buckling seat 6. The gas-gathering box 7 is connected to the air outlet 62, and the air outlet 62 is close to the top of the gas-gathering box 7, enabling the high-pressure and fast gas in the power cavity to rush into the gas-gathering box 7 through the air outlet 62. An elastic membrane 8 is fixedly sleeved in the gas-gathering box 7. The elastic membrane 8 divides the inner cavity of the gas-gathering box 7 into two isolated chambers, enabling the high-pressure and fast gas rushing into the gas-gathering box 7 to impact the elastic membrane 8, causing the elastic membrane 8 to expand in the direction away from the air outlet 62 and increasing the space between the elastic membrane 8 and the air outlet 62, providing a larger retention space for the rushing gas.

[0033] Refer to Figure 2 , a hose II 16 is fixedly connected to the annular pipe 13. The other end of the hose II 16 penetrates through the buckling seat 6 and the gas-gathering box 7 into the gas-gathering box 7, enabling the high-pressure gas in the gas-gathering box 7 to rush into the annular pipe 13 through the hose II 16. The top of the hose II 16 is close to the air outlet 62, enabling the high-pressure and fast gas rushing out of the air outlet 62 to impact on the top of the hose II 16, causing the top of the hose II 16 to deflect towards the side of the elastic membrane 8, reducing the flow cross-sectional area at the deflection part of the hose II 16 and accelerating the flow velocity of the air flow here. Due to the existence of the elastic membrane 8, the space between the elastic membrane 8 and the air outlet 62 can be changed, enabling only a part of the high-pressure gas in this space to reach the annular pipe 13 at the deflection part synchronously, enabling a large amount of high-pressure gas to remain in this space. When the subsequent high-pressure gas supply stops, the deflected part of the hose II 16 will recover under its own elastic force. At this time, the expanded elastic membrane 8 will squeeze the retained gas and press it into the annular pipe 13 through the hose II 16. At this time, the hot press module is in a rotating state.

[0034] Refer to Figures 2 to 3, a uniformly distributed jet pipe 17 is fixedly connected to the bottom of the annular pipe 13. The bottom end of the jet pipe 17 penetrates through the mounting seat 15 to the upper side of the cooling wheel 19, and the bottom end of the jet pipe 17 is flat. The bottom end of the jet pipe 17 is close to the center of the mounting seat 15, so that the high-pressure fast gas in the annular pipe 13 can be sprayed downward onto the cooling wheel 19 through the jet pipe 17 and rush downward along the circumferential surface of the cooling wheel 19 towards the film below. Since the jet pipe 17 rotates circumferentially and the flow cross-sectional area of the outlet of the jet pipe 17 decreases, the air flow is accelerated and impacts the film below circumferentially, causing the film to be tightly pressed against the paper tableware until the cooling wheel 19 and the hot pressing wheel press on the film to shape the film. When the cooling wheel 19 squeezes and cools the pressed film, the part of the rotating cooling wheel 19 in contact with the film will be directly impacted and cooled by the cooling air flow sprayed out by the jet pipe 17 during the rotation process, so that the heated part of the cooling wheel 19 can be quickly cooled down for the next round of film cooling. During this process, the cooling air flow will still impact on the film pressed by the hot pressing wheel for air flow 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; A connecting plate (14) is provided between the mounting seat (15) and the ring tube (13) for connection, and a cooling wheel (19) and a hot pressing wheel are provided at the bottom for hot pressing and cooling the film; 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 the high-pressure rapid gas output from the power chamber, and an elastic membrane (8) is arranged inside the gas collecting box (7) for deforming and storing energy when receiving the gas; a hose II (16) is arranged on the annular tube (13) and connected to the gas collecting box (7), and the top of the hose II (16) is close to the gas outlet (62) for receiving the impact of the high-pressure rapid gas for deflection; and uniformly distributed jet pipes (17) are arranged at the bottom of the annular tube (13), and the bottom end of the jet pipe (17) passes through the mounting seat (15) to the top of the cooling wheel (19), and the bottom end of the jet pipe (17) is flat, and the bottom end of the jet pipe (17) is close to the center of the mounting seat (15) for outputting airflow to press the film and cool the cooling wheel (19) and 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).

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