A cup bottom heating and sealing device for a high-speed intelligent paper cup machine

Abstract

This invention discloses a cup bottom heating and sealing device for a high-speed intelligent paper cup machine, relating to the field of paper cup processing. The technical solution includes a base and a slide rail fixedly mounted on the base. Multiple electric slides are arranged on the slide rail, and cup holders are rotatably connected to the electric slides. A mold is placed on the top of the cup holder. A steering plate is fixedly connected to the center of the rear side of the base, and sealing mechanisms are arranged on both sides of the steering plate. The beneficial effects of this invention are: through two symmetrically arranged sealing mechanisms, a central steering plate, and a rotatable cup holder structure with a rubber layer, this invention achieves the function of automatically sealing the remaining area of ​​the cup holder after the paper cup is hot-pressed at the first station, using rubber friction to drive the cup holder to rotate precisely. Ultimately, this achieves 360° sealing of the cup bottom without dead angles and significantly shortens the production cycle time, solving the problems of low efficiency and easy sealing of dead angles in traditional single-station equipment.

Description

Technical Field

[0001] This invention relates to the field of paper cup processing, and specifically to a cup bottom heating and sealing device for a high-speed intelligent paper cup machine. Background Technology

[0002] With the rapid development of the food and beverage industry, disposable paper cups are widely used in catering, office, and retail sectors due to their convenience, hygiene, and low cost. Market demand continues to grow. Among these processes, the heat sealing of the cup bottom is the core step in paper cup production. The sealing quality directly determines the sealing performance, structural strength, and yield of the paper cup, while the sealing efficiency directly affects the overall production line capacity. Existing sealing devices have three major problems: First, they mostly adopt a single-station design, which requires multiple rotations of the paper cup to complete the full circumference sealing, resulting in low efficiency and easy leakage of sealing dead corners; second, the hot pressing units are mostly independently driven, resulting in poor synchronization and uneven sealing strength, while also having a complex structure and high failure rate; third, they lack automatic cleaning function, and residual impurities on the hot pressing plate require periodic shutdown for manual cleaning, which is extremely inconvenient.

[0003] Therefore, it is necessary to invent a high-speed intelligent paper cup machine with a cup bottom heating and sealing device. Summary of the Invention

[0004] Therefore, the present invention provides a cup bottom heating and sealing device for a high-speed intelligent paper cup machine to solve the problems in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a cup bottom heating and sealing device for a high-speed intelligent paper cup machine, comprising a base and a slide rail fixedly installed on the base, wherein a plurality of electric slides are provided on the slide rail, and a cup holder rotatably connected thereto is provided on the electric slide, wherein a mold is placed on the top of the cup holder, and a turning plate is fixedly connected to the middle of the rear side of the base, and sealing mechanisms are provided on both sides of the turning plate. The sealing mechanism includes a bracket fixedly installed on the rear side of the base. A main motor is fixedly installed on the top of the bracket. The output shaft of the main motor passes through the bracket and is fixedly connected to a screw. A column threadedly connected to the screw is sleeved on the outside of the screw. A base is fixedly sleeved on the outside of the column. A connecting plate slidably connected to the base is installed through the base. A cylinder is fixedly connected to the bottom of the connecting plate. The bottom end of the column extends into the cylinder and is fixedly connected to a main piston plate. The main piston plate is adapted to the inner wall of the cylinder and changes the internal volume of the cylinder when the cylinder moves up and down. Hot pressing units are fixedly connected to all four sides of the cylinder. A support base is also fixedly installed at the bottom of the bracket. A cleaning unit is installed inside the support base.

[0006] Preferably, the hot pressing unit includes a connecting seat fixedly connected to the cylinder. The inner wall of the connecting seat is provided with a secondary piston plate adapted to it. A support plate is fixedly connected to the side of the secondary piston plate away from the cylinder. An outer plate is slidably connected to the support plate. A spring is fixedly connected to the end of the support plate near the outer plate. The end of the spring is fixedly connected to the inner wall of the outer plate. A hot pressing plate is fixedly connected to the end of the outer plate away from the cylinder. The outer edge of the hot pressing plate is arc-shaped.

[0007] Preferably, the cleaning unit is located on top of the hot pressing unit, and the cleaning unit includes a toothed ring and a gear rotatably mounted in the inner cavity of the support base. A brush strip is fixedly connected to the inner wall of the toothed ring, and the gear is located on one side of the toothed ring and meshes with the toothed ring. An auxiliary motor is fixedly mounted on the top of the support base, and the output shaft of the auxiliary motor passes through the support base and is fixedly connected to the gear.

[0008] Preferably, an outer pressure plate is fixedly connected to the outside of the cylinder, and an inner pressure plate is fixedly connected to the bottom of the cylinder. The inner edge of the outer pressure plate is adapted to the arc-shaped outer edge of the hot pressure plate.

[0009] Preferably, the bottom inner wall edge of the hot press plate is chamfered.

[0010] Preferably, the outer edge of the cup holder and the surface of the steering plate are both fixedly connected with a rubber layer.

[0011] Preferably, the four corners of the top of the base are fixedly connected with limiting slide rods, and the top of the limiting slide rods passes through the bracket and is slidably connected to the bracket.

[0012] The beneficial effects of this invention are: This invention, through two symmetrically arranged sealing mechanisms, a central steering plate, and a rotatable cup holder structure with a rubber layer, enables the cup holder to rotate precisely after the paper cup is hot-pressed at the first station, using rubber friction to automatically seal the remaining area at the second station. This achieves 360° full-circumference sealing of the cup bottom without any dead angles and significantly shortens the production cycle time, solving the problems of low efficiency and easy sealing dead angles in traditional single-station equipment.

[0013] This invention utilizes a pneumatic linkage hot pressing unit driven by a single main motor, a dual positioning structure of outer and inner pressure plates, and a built-in spring buffer structure in the hot pressing unit. In actual use, the main piston plate compresses air from the cylinder to synchronously drive the four hot pressing plates to extend, which work in conjunction with the outer pressure plate to achieve hot pressing and sealing of the cup bottom. At the same time, the outer pressure plate can accurately position the paper cup before hot pressing and provide elastic buffering during hot pressing, ultimately achieving a balanced and stable hot pressing and sealing of the paper cup bottom.

[0014] This invention utilizes a cleaning unit structure composed of an auxiliary motor, gears, a toothed ring, and a brush strip integrated within the support base. In practical use, this structure automatically cleans the working surface of the hot press plate in all directions when the hot press unit is reset and moved upward, thus preventing impurities adhering to the hot press plate from affecting the hot press sealing effect. Attached Figure Description

[0015] To more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings in the following description are merely exemplary, and those skilled in the art can derive other embodiments based on the provided drawings without creative effort.

[0016] The structures, proportions, sizes, etc. illustrated in this specification are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed herein, and are not intended to limit the conditions under which the present invention can be implemented. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportions, or adjustments to the size, without affecting the effects and objectives that the present invention can produce, should still fall within the scope of the technical content disclosed in the present invention.

[0017] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 A schematic diagram of the sealing mechanism provided by the present invention; Figure 3 This is a schematic diagram of a half-section of the sealing mechanism provided by the present invention; Figure 4 This is an exploded view of the hot-pressing unit structure provided by the present invention; Figure 5 Provided by the present invention Figure 4 Enlarged view of the structure of section A in the middle; Figure 6 This is an exploded view of the cleaning unit structure provided by the present invention. In the diagram: 1. Base, 2. Slide rail, 3. Electric slide table, 4. Cup holder, 5. Mold, 6. Steering plate, 7. Bracket, 8. Main motor, 9. Screw, 10. Column, 11. Base, 12. Connecting plate, 13. Cylinder, 14. Main piston plate, 15. Support seat, 16. Connecting seat, 17. Secondary piston plate, 18. Support plate, 19. Outer plate, 20. Spring, 21. Hot press plate, 22. Gear ring, 23. Gear, 24. Brush strip, 25. Secondary motor, 26. Outer pressure plate, 27. Inner pressure plate, 28. Chamfer, 29. Limiting slide rod. Detailed Implementation

[0018] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0019] See attached document Figure 1 - Appendix Figure 6 The present invention provides a cup bottom heating and sealing device for a high-speed intelligent paper cup machine, including a base 1 and a slide rail 2 fixedly installed on the base 1. Multiple electric slides 3 are provided on the slide rail 2. A cup holder 4 is rotatably connected to the electric slide 3. A mold 5 is placed on the top of the cup holder 4. A turning plate 6 is fixedly connected to the middle of the rear side of the base 1. Sealing mechanisms are provided on both sides of the turning plate 6. The sealing mechanism includes a bracket 7 fixedly installed on the rear side of the base 1. A main motor 8 is fixedly installed on the top of the bracket 7. The output shaft of the main motor 8 passes through the bracket 7 and is fixedly connected to a screw 9. A column 10 is threadedly connected to the screw 9. A base 11 is fixedly sleeved on the outside of the column 10. A connecting plate 12 is slidably connected to the base 11. A cylinder 13 is fixedly connected to the bottom of the connecting plate 12. The bottom end of the column 10 extends into the cylinder 13 and is fixedly connected to a main piston plate 14. The main piston plate 14 is adapted to the inner wall of the cylinder 13 and changes the internal volume of the cylinder 13 when the cylinder 13 moves up and down. Hot pressing units are fixedly connected to all four sides of the cylinder 13. A support base 15 is also fixedly installed at the bottom of the bracket 7. A cleaning unit is provided inside the support base 15. In this embodiment, the paper cup is placed upside down on the mold 5 of the cup holder 4 and moves to the bottom of the sealing mechanism along with the electric slide 3. The bottom of the paper cup is then heat-sealed by the hot pressing unit of the sealing mechanism. After that, it moves to the next sealing mechanism along with the electric slide 3. When it passes the turning plate 6, the cup holder 4 will rotate at a certain angle when it comes into contact with the turning plate 6, thereby driving the mold 5 and the paper cup to rotate. This makes it easier for the next sealing mechanism to heat-press the bottom of the paper cup at different angles, thus completely heat-sealing the bottom of the paper cup.

[0020] An outer pressure plate 26 is fixedly connected to the outside of the cylinder 13, and an inner pressure plate 27 is fixedly connected to the bottom of the cylinder 13. The inner edge of the outer pressure plate 26 is adapted to the arc-shaped outer edge of the hot pressure plate 21. A chamfer 28 is provided on the inner edge of the bottom of the hot pressure plate 21. The outer pressure plate 26 can limit the bottom of the paper cup, preventing the paper cup from shifting during hot pressing and affecting the hot pressing operation. At the same time, the chamfer 28 design also makes it easier for the paper cup to be better inserted into the outer pressure plate 26.

[0021] The hot pressing unit includes a connecting seat 16 fixedly connected around the cylinder 13. A secondary piston plate 17 adapted to the inner wall of the connecting seat 16 is provided. A support plate 18 is fixedly connected to the side of the secondary piston plate 17 away from the cylinder 13. An outer plate 19 is slidably connected to the support plate 18. A spring 20 is fixedly connected to the end of the support plate 18 near the outer plate 19, and the end of the spring 20 is fixedly connected to the inner wall of the outer plate 19. A hot pressing plate 21 is fixedly connected to the end of the outer plate 19 away from the cylinder 13, and the outer edge of the hot pressing plate 21 is arc-shaped. The main motor 8 drives the screw 9 to rotate, causing the column... 10 moves down and drives cylinder 13 to move down until the inner wall of outer pressure plate 26 contacts and fits on the outside of the bottom of paper cup. At this time, inner pressure plate 27 will press tightly on the bottom of paper cup. Main motor 8 continues to work, driving column 10 to continue pressing down. At this time, cylinder 13 can no longer descend. Column 10 will drive main piston plate 14 to move down inside cylinder 13, thereby causing auxiliary piston plates 17 in each connecting seat 16 to move outward. Then, through support plate 18 and outer plate 19, hot pressure plate 21 is pushed outward, and finally hot pressure plate 21 is pressed and adhered to the inner edge of the bottom of the cup, realizing the hot pressure sealing of the bottom of paper cup.

[0022] To achieve rapid cleaning of the hot press plate 21, the device employs the following technical solution: the cleaning unit is located at the top of the hot press unit, and includes a gear ring 22 and a gear 23 rotatably mounted inside the support base 15. A brush strip 24 is fixedly connected to the inner wall of the gear ring 22, and the gear 23 is located on one side of the gear ring 22 and meshes with it. An auxiliary motor 25 is fixedly mounted on the top of the support base 15, and the output shaft of the auxiliary motor 25 passes through the support base 15 and is fixedly connected to the gear 23. The main motor 8 can reverse to drive the column 10 and the base 11 to move upward, which in turn drives the cylinder 13 and the entire hot press unit to move upward through the connecting plate 12, ultimately raising the hot press plate 21 to the position of the brush strip 24. The auxiliary motor 25 drives the gear 23, the gear ring 22, and the brush strip 24 to rotate, thus quickly cleaning the hot press plate 21.

[0023] In order to achieve more stable rotation of the cup holder 4 when it moves past the turning plate 6, the device adopts the following technical solution: the outer edge of the cup holder 4 and the surface of the turning plate 6 are both fixedly connected with a rubber layer; the rubber layer has greater static friction and can drive the cup holder 4 to rotate more stably when it passes by, thereby adjusting the subsequent hot pressing angle of the paper cup.

[0024] In order to achieve the purpose of smooth lifting and lowering of the column 10, the device adopts the following technical solution: the four corners of the top of the base 11 are fixedly connected with limit slide rods 29, the top of the limit slide rods 29 passes through the bracket 7 and is slidably connected to the bracket 7; the limit slide rods 29 can limit the movement path of the column 10 and the base 11, so as to ensure that the column 10 and the base 11 move stably up and down when the screw 9 rotates.

[0025] The overall workflow of this invention application can be divided into five stages: material feeding and conveying, first-station hot-press sealing, automatic steering, second-station hot-press sealing, unloading and self-cleaning. The specific working principles of each stage are as follows: I. Feeding and Conveying Stage The paper cups to be sealed are placed upside down on the mold 5 on top of the cup holder 4. The mold 5 is precisely fitted to the inner wall of the paper cup to ensure the coaxiality of the paper cup placement. Multiple electric slides 3 move intermittently in a straight line along the slide rail 2 on the base 1, sequentially transporting the cup holder 4 carrying the paper cups to the two sealing mechanisms directly below the rear side of the base 1, realizing continuous feeding of paper cups and station switching. The cup holder 4 and the electric slides 3 adopt a rotating connection design, providing a structural basis for subsequent automatic turning.

[0026] II. First station hot pressing and sealing stage When the electric slide 3 carrying the paper cup stops directly below the first sealing mechanism, the sealing mechanism is activated to complete the heat-sealing of the bottom of the cup at the first angle. The specific operating principle is as follows: Pre-positioning and clamping: The main motor 8 starts in the forward direction, driving the screw 9 to rotate synchronously. Since the screw 9 is threadedly connected to the column 10, and the four limiting slide rods 29 on the top of the base 11 are slidably connected to the bracket 7, the rotational freedom of the column 10 is restricted. Therefore, the rotation of the screw 9 will drive the column 10 to move smoothly downward in the vertical direction. The column 10 drives the cylinder 13 to move downward as a whole through the base 11 and the connecting plate 12 until the inner wall of the outer pressure plate 26 outside the cylinder 13 is fitted onto the outside of the bottom of the paper cup. At the same time, the inner pressure plate 27 at the bottom of the cylinder 13 presses against the upper surface of the bottom of the paper cup. The chamfer 28 on the inner wall of the bottom of the hot pressing plate 21 can guide the paper cup to be smoothly inserted into the outer pressure plate 26. The outer pressure plate 26 and the inner pressure plate 27 work together to achieve double positioning of the bottom of the paper cup, avoiding displacement or deformation of the paper cup during the hot pressing process.

[0027] Pneumatic linkage hot pressing: After the outer pressure plate 26 and inner pressure plate 27 complete the positioning and pressing, the main motor 8 continues to rotate in the forward direction, driving the column 10 to move further down. At this time, the cylinder 13 is limited by the paper cup and cannot continue to descend. The main piston plate 14 at the bottom of the column 10 will slide down inside the cylinder 13, compressing the sealed air inside the cylinder 13, causing the air pressure inside the cylinder 13 to rise. The high-pressure air enters the interior of each hot pressing unit through the connecting seat 16 around the cylinder 13, pushing the auxiliary piston plate 17 in the connecting seat 16 to move outward. The auxiliary piston plate 17 drives the hot pressing plate 21 to extend outward synchronously through the support plate 18 and the outer plate 19 until the arc-shaped outer edge of the hot pressing plate 21 is tightly attached to the inner edge of the outer pressure plate 26, squeezing the inner edge of the bottom of the paper cup between the hot pressing plate 21 and the outer pressure plate 26. The hot pressing plate 21 is heated by electricity, and the paper material at the bottom of the paper cup is fused and sealed to the cup body through the hot pressing action.

[0028] Buffering and pressure holding: The spring 20 between the support plate 18 and the outer plate 19 provides elastic buffering to prevent excessive pressure from causing the paper cup to break when the hot plate 21 extends. At the same time, it ensures that the pressure is uniform when the hot plate 21 contacts the bottom of the cup, improving the sealing quality. After the preset pressure holding time, the first stage of hot-press sealing is completed at four evenly distributed positions on the bottom of the cup.

[0029] III. Automatic Steering Phase After the first station is sealed, the main motor 8 rotates in the reverse direction, driving the column 10 to move upward. The main piston plate 14 slides upward in the cylinder 13, the air pressure in the cylinder 13 decreases, and the hot pressing plate 21 automatically retracts under the restoring force of the spring 20. The outer pressure plate 26 and the inner pressure plate 27 detach from the bottom of the paper cup. The electric slide table 3 continues to move forward along the slide rail 2. When the outer edge of the cup holder 4 passes the turning plate 6 in the middle of the rear side of the base 1, the rubber layer of the outer edge of the cup holder 4 comes into contact with the rubber layer on the surface of the turning plate 6. The static friction between the two drives the cup holder 4 to rotate 90° relative to the electric slide table 3, thereby driving the mold 5 and the paper cup to rotate 90° synchronously, so that the four positions of the bottom of the cup that have not been hot-pressed are aligned with the hot pressing unit of the second sealing mechanism, preparing for the second stage of pressure replenishment.

[0030] IV. Second Station Hot Press Sealing Stage The electric slide 3, carrying the rotated paper cup, stops directly below the second sealing mechanism. This sealing mechanism repeats the hot pressing process of the first station to complete the hot pressing and sealing of the remaining four positions of the cup bottom. Through two 90° staggered hot pressing operations, the paper cup bottom is uniformly sealed 360° around the entire circumference, completely solving the sealing dead angle problem of single-station hot pressing and ensuring the sealing performance and structural strength of the cup bottom.

[0031] V. Material feeding and online self-cleaning stage Finished product unloading: After the sealing at the second station is completed, the main motor 8 of the sealing mechanism reverses and drives the hot pressing unit to reset. The electric slide 3 transports the sealed paper cup to the unloading station, where the matching unloading mechanism removes the paper cup from the mold 5, completing the bottom sealing process of a paper cup.

[0032] Self-cleaning of hot press plate 21: When the hot press unit of the sealing mechanism is reset and moved upward, the hot press plate 21 will rise to the position of the brush strip 24 of the cleaning unit inside the support base 15. At this time, the auxiliary motor 25 starts and drives the gear 23 to rotate. The gear 23 meshes and drives the gear ring 22 to rotate in the inner cavity of the support base 15. The brush strip 24 on the inner wall of the gear ring 22 then makes a circular motion to thoroughly clean the working surfaces of the four hot press plates 21, quickly removing residual paper scraps, hot melt adhesive and other impurities on the hot press plates 21, and avoiding the accumulation of impurities that affect the subsequent sealing quality.

[0033] The above description is merely a preferred embodiment of the present invention. Any person skilled in the art can modify the present invention or modify it into an equivalent technical solution using the technical solutions described above. Therefore, any simple modifications or equivalent substitutions made based on the technical solutions of the present invention fall within the scope of protection claimed by the present invention.

Claims

1. A cup bottom heating and sealing device for a high-speed intelligent paper cup machine, comprising a base (1) and a slide rail (2) fixedly mounted on the base (1), wherein the slide rail (2) is provided with a plurality of electric slides (3), characterized in that: The electric slide (3) is provided with a cup holder (4) that is rotatably connected to it. A mold (5) is placed on the top of the cup holder (4). A steering plate (6) is fixedly connected to the middle of the rear side of the base (1). A sealing mechanism is provided on both sides of the steering plate (6). The sealing mechanism includes a bracket (7) fixedly installed on the rear side of the base (1). A main motor (8) is fixedly installed on the top of the bracket (7). The output shaft of the main motor (8) passes through the bracket (7) and is fixedly connected to a screw (9). A column (10) is threadedly connected to the screw (9). A base (11) is fixedly sleeved on the outside of the column (10). A connecting plate (12) is slidably connected to the base (11). A cylinder (13) is fixedly connected to the bottom of the connecting plate (12). The bottom end of the column (10) extends into the cylinder (13) and is fixedly connected to a main piston plate (14). The main piston plate (14) is adapted to the inner wall of the cylinder (13) and changes the internal volume of the cylinder (13) when the cylinder (13) moves up and down. Hot pressing units are fixedly connected around the cylinder (13). A support seat (15) is also fixedly installed at the bottom of the bracket (7). A cleaning unit is provided inside the support seat (15).

2. The cup bottom heating and sealing device for a high-speed intelligent paper cup machine according to claim 1, characterized in that: The hot pressing unit includes a connecting seat (16) fixedly connected around the cylinder (13). The inner wall of the connecting seat (16) is provided with a secondary piston plate (17) adapted to it. A support plate (18) is fixedly connected to the side of the secondary piston plate (17) away from the cylinder (13). An outer plate (19) is slidably connected to the support plate (18). A spring (20) is fixedly connected to the end of the support plate (18) near the outer plate (19). The end of the spring (20) is fixedly connected to the inner wall of the outer plate (19). A hot pressing plate (21) is fixedly connected to the end of the outer plate (19) away from the cylinder (13). The outer edge of the hot pressing plate (21) is set in an arc shape.

3. The cup bottom heating and sealing device for a high-speed intelligent paper cup machine according to claim 1, characterized in that: The cleaning unit is located on top of the hot pressing unit, and the cleaning unit includes a toothed ring (22) and a gear (23) rotatably installed in the inner cavity of the support base (15). A brush strip (24) is fixedly connected to the inner wall of the toothed ring (22). The gear (23) is located on one side of the toothed ring (22) and meshes with the toothed ring (22). An auxiliary motor (25) is fixedly installed on the top of the support base (15). The output shaft of the auxiliary motor (25) passes through the support base (15) and is fixedly connected to the gear (23).

4. The cup bottom heating and sealing device for a high-speed intelligent paper cup machine according to claim 2, characterized in that: An outer pressure plate (26) is fixedly connected to the outside of the cylinder (13), and an inner pressure plate (27) is fixedly connected to the bottom of the cylinder (13). The inner edge of the outer pressure plate (26) is adapted to the arc-shaped outer edge of the hot press plate (21).

5. The cup bottom heating and sealing device for a high-speed intelligent paper cup machine according to claim 4, characterized in that: The bottom inner wall edge of the hot press plate (21) is provided with a chamfer (28).

6. The cup bottom heating and sealing device for a high-speed intelligent paper cup machine according to claim 1, characterized in that: The outer edge of the cup holder (4) and the surface of the steering plate (6) are both fixedly connected with rubber layers.

7. The cup bottom heating and sealing device for a high-speed intelligent paper cup machine according to claim 1, characterized in that: The base (11) has four fixed corners of the top of the limiting slide rod (29), the top of the limiting slide rod (29) passes through the bracket (7) and is slidably connected to the bracket (7).

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