A tablet press for processing sheet food

Abstract

The utility model discloses a kind of tabletting machines for sheet food processing, including frame and combined compression roller;The combined compression roller includes driving roller and driven roller, driving roller is connected with driving motor, and driven roller is connected with driving roller by belt pulley transmission mechanism;Spacing adjustment device is equipped between the driving roller and the driven roller, and spacing adjustment device is used to adjust the spacing between driving roller and driven roller;Belt tensioning device is further provided on the frame, and the belt tensioning device includes tension pulley;Waist-shaped hole is reserved on the one side of belt pulley of frame, and the shaft of tension pulley is installed in the waist-shaped hole by bearing seat, and can be moved in waist-shaped hole to carry out position adjustment, spring is equipped in waist-shaped hole, and the spring is abutted on bearing seat to exert pre-tightening force.The utility model is compact in structure, reasonable in design, easy to operate, and can efficiently complete the processing task of sheet food under the condition of single motor power.

Description

Technical Field

[0001] This utility model relates to the field of food machinery technology, specifically a sheet press for processing thin-sheet food blanks. Background Technology

[0002] In the food processing industry, the production efficiency and product quality of sheet foods such as biscuits and cereal flakes are important indicators of a company's competitiveness. Traditional tablet presses typically use two opposing pressure rollers to press the sheets. While this design meets basic production needs to some extent, it has significant drawbacks.

[0003] In the current technical field, the main function of a tablet press is to produce continuous thin sheet blanks by combining two sets of opposing pressure rollers. However, most existing tablet presses suffer from insufficient flexibility and precision in adjusting the distance between their pressure rollers. For example, in the utility model patent: a thin food tablet press (CN 206403178 U), although a wedge tensioning device is used as the roller spacing adjustment mechanism for the combined pressure rollers, and the belt on the pulley drive mechanism is tensioned after the spacing is adjusted, the roller spacing cannot be readjusted after assembly. Improper adjustment may cause the pressure rollers to wobble during operation, and stability is difficult to maintain after continuous use for a period of time. This directly affects the accuracy of the thin sheet pressing process and the consistency of the final product quality. This makes it difficult to adapt to food blanks of different thicknesses and hardnesses during production. For the reasons mentioned above, some pressure roller combinations use adjustable spacing structures. However, their spacing adjustment structure is relatively simple, limited to adjusting the pressure roller spacing to meet production needs. It cannot meet the tension requirements of a single motor drive and requires dual motors for driving. Otherwise, the stability of the pressure rollers will deteriorate, and vibration during operation will be easily caused. This vibration will not only affect the pressing effect, causing wear and loosening of equipment parts and reducing the service life of the equipment, but may also generate greater working noise and affect the operating environment.

[0004] In summary, existing tablet presses have many shortcomings in the processing of thin-sheet foods, and there is an urgent need for a more stable, precise, and easy-to-operate and maintain tablet press to improve production efficiency and product quality. Utility Model Content

[0005] The technical problem solved by this utility model is to provide a tablet press for processing thin-sheet food, and to overcome the defects in the above-mentioned technical background.

[0006] The technical problem solved by this utility model is achieved by the following technical solution:

[0007] A tablet press for processing thin-sheet food includes a frame and a combination of pressure rollers mounted on the frame;

[0008] The combined pressure roller includes an active pressure roller and a driven pressure roller arranged opposite to each other. The active pressure roller is connected to a drive motor, and the driven pressure roller is connected to the active pressure roller through a belt pulley transmission mechanism, thereby realizing an indirect power connection with the drive motor.

[0009] A spacing adjustment device is provided between the active pressure roller and the driven pressure roller. The spacing adjustment device is used to adjust the spacing between the active pressure roller and the driven pressure roller to meet the processing requirements of food blanks with different thicknesses and hardnesses.

[0010] The frame is also equipped with a belt tensioning device, which is used to dynamically tension the belt on the pulley drive mechanism. The belt tensioning device includes a tensioning wheel. The frame has a recessed hole on one side of the pulley. The shaft of the tensioning wheel is installed in the recessed hole through a bearing seat and can move within the recessed hole for position adjustment. A spring is provided in the recessed hole, and the spring abuts against the bearing seat to apply preload.

[0011] As a further limitation, the frame is provided with outer protective plates on both sides of the corresponding combination pressure rollers. The outer protective plates are detachable and enclose the transmission structure of the equipment from the outside.

[0012] As a further limitation, the active pressure roller and the driven pressure roller are mirror rollers formed of high nickel-chromium-molybdenum alloy, with a diameter D≥200mm, a length L≥300mm, an alloy layer thickness of 30~35mm, and a hardness HRC≥55±1°.

[0013] As a further limitation, both the active pressure roller and the driven pressure roller are equipped with a rotary water cooling system. The rotary water cooling system includes a water cooling pipe, an inlet and an outlet. The water cooling pipe is a serpentine pipe and is arranged along the length of the roller body. The two ends of the water cooling pipe are connected to the inlet and the outlet respectively. The inlet and the outlet are connected to a circulating water circuit to cool the pressure roller through circulating cooling water.

[0014] As a further limitation, both the active pressure roller and the driven pressure roller are equipped with anti-stick pneumatic scrapers.

[0015] As a further limitation, the frame is formed with a transversely arranged guide groove, and the roller shafts of the active pressure roller and the driven pressure roller are assembled in the guide groove through bearing seats. The spacing adjustment device adjusts the spacing between the active pressure roller and the driven pressure roller by driving the roller shafts of the active pressure roller and the driven pressure roller to move towards each other in the guide groove.

[0016] As a further limitation, the spacing adjustment device is a worm gear transmission mechanism, with the driving pressure roller fixedly mounted on the frame and the driven pressure roller mounted on the output shaft of the worm gear transmission mechanism. The displacement adjustment of the driven pressure roller is achieved through the rotational movement of the worm gear.

[0017] As a further limitation, the spacing adjustment device includes a combined wedge block and a threaded push rod. The combined wedge block includes a first wedge block and a second wedge block whose inclined surfaces contact each other. The first wedge block is a fixed structural component, which is fixedly connected to the frame, while the second wedge block is a movable structural component, which is set in a horizontal guide groove and can be moved in position through the horizontal guide groove. The threaded push rod is a vertically set active structural component, whose top is assembled and connected to the handwheel, and whose bottom abuts against the top surface of the second wedge block.

[0018] When the bearing housing of the driving pressure roller is assembled with the first wedge block, the second wedge block rests against the side of the bearing housing of the driven pressure roller on its back side; conversely, when the bearing housing of the driven pressure roller and the first wedge block are assembled with the driving pressure roller, the second wedge block rests against the side of the bearing housing of the driving pressure roller on its back side.

[0019] The spacing adjustment device is provided in two sets, which are respectively located on both sides of the frame.

[0020] As a further limitation, the spring installed inside the waist-shaped hole is an adjustable spring with adjustable tension.

[0021] Beneficial Effects: This utility model discloses a tablet press for processing thin-sheet food. By equipping it with a spacing adjustment device, the distance between the active and driven pressure rollers can be flexibly adjusted. Precise control of the roller spacing meets the needs of processing food blanks of different thicknesses and hardnesses. It also enables dynamic tightening of the belt in the pulley drive system using a single motor, significantly improving the stability of the pressure roller operation. This not only ensures the accuracy of the pressing process but also the consistency of the final product quality. Furthermore, by setting up a belt tensioning device, the belt on the pulley drive mechanism can be dynamically tensioned, thereby improving the adaptability and flexibility of the equipment, ensuring the stability of the belt during transmission, and avoiding transmission failure due to belt slack. The pre-tensioning force applied by the spring in the slotted hole further improves the belt tensioning effect, enhancing the stability and reliability of the equipment. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of a preferred embodiment of the present invention.

[0023] Figure 2 for Figure 1 A schematic diagram of the working part.

[0024] The components include: 1. Feed hopper; 2. Active pressure roller; 3. Discharge plane; 4. First transmission belt; 5. Frame; 6. Drive motor; 7. Driven pressure roller; 8. Belt tensioning device; 9. Second transmission belt; 10. Spacing adjustment device; 11. Handwheel; 12. Locking device; 13. Auxiliary tensioning wheel; 14. Tensioning wheel; 15. Waist-shaped hole; 16. Bearing seat; 17. Spring; 18. First wedge block; 19. Second wedge block; 20. Threaded push rod. Detailed Implementation

[0025] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the following description, in conjunction with specific illustrations, further elaborates on this utility model.

[0026] See Figure 1 , Figure 2 A preferred embodiment of a tablet press for processing thin-sheet food includes a frame 5 as the main support structure. The frame 5 includes a lower support and an upper support. The lower support is designed with a steel frame structure, and support feet are provided at the four corners of the bottom of the lower support to ensure the stability and load-bearing capacity of the entire device. Bolt holes for mounting and fixing the upper support are pre-drilled on the surface of the lower support of the frame 5. Additionally, a motor mounting position is provided within the lower hollow frame structure of the lower support to facilitate the installation of the drive motor 6 and to facilitate heat dissipation during operation.

[0027] The upper part of the frame 5 is equipped with the working part, which is mounted in the upper support and fixed by the upper support. The working part mainly includes the active pressure roller 2, the driven pressure roller 7, and the belt pulley transmission mechanism connecting the two. The paper-side of the active pressure roller 2 is connected to the output shaft of the drive motor 6 via a first transmission belt, and is powered by the drive motor 6; the paper-side of the active pressure roller 2 is connected to the driven pressure roller 7 via a tensioned second transmission belt, realizing indirect power transmission. This design allows the driven pressure roller 7 to rotate along with the active pressure roller 2, jointly completing the pressing of the food blank.

[0028] A spacing adjustment device 10 is provided between the active pressure roller 2 and the driven pressure roller 7. This device can flexibly adjust the spacing between the two to adapt to the processing needs of food blanks with different thicknesses and hardnesses.

[0029] In this embodiment, the spacing adjustment device 10 adopts a combination structure of combined wedges and threaded push rods. Specifically, the combined wedges include a first wedge block 18 and a second wedge block 19. The first wedge block 18 is a fixed structural component, which is fastened to the frame 5 with bolts and assembled with the bearing seat of the driven pressure roller 7. The second wedge block 19 is a movable structural component, which is set in the horizontal guide groove reserved in the frame 5. The back side of the second wedge block 19 abuts against the side of the bearing seat of the active pressure roller 2 and can be moved by the horizontal guide groove. The horizontal guide groove reserved in the frame 5 is also provided with a spring structure that presses the second wedge block 19 toward the first wedge block 18 to ensure that the inclined surfaces of the two are in close contact.

[0030] When the inclined surfaces of the first wedge block 18 and the second wedge block 19 come into contact with each other and generate extrusion force, the second wedge block 19 will move along the horizontal guide groove, thereby pushing or pulling the bearing seat of the driven pressure roller 7, so as to adjust the distance between the driving pressure roller 2 and the driven pressure roller 7.

[0031] The threaded push rod 20 is a vertically arranged threaded screw structure. Its top is assembled and connected to the handwheel 11, and its bottom abuts against the top surface of the second wedge block 19. The threaded block of the screw is fixed to the upper support. Therefore, by rotating the handwheel 11, the threaded push rod 20 will rise and fall along its axis, thereby applying a pushing or pulling force to the second wedge block 19. This allows for fine adjustment of the distance between the driving pressure roller 2 and the driven pressure roller 7 by the inclined surface of the second wedge block 19 abutting against the first wedge block 18. This design not only makes the distance adjustment process simpler and faster, but also improves the accuracy of the adjustment.

[0032] In addition, in this embodiment, besides the handwheel 11, a locking device 12 is also provided on the upper support of the frame 5 at a corresponding position on its side. This device is used to lock the positions of the active pressure roller 2 and the driven pressure roller 7 after the spacing adjustment is completed, preventing them from shifting during operation, thereby ensuring the stability and safety of the pressing process.

[0033] In another embodiment, the spacing adjustment device 10 can also employ a worm gear transmission mechanism. If a worm gear transmission mechanism is used, the driving pressure roller 2 is fixedly mounted on the frame 5, while the driven pressure roller 7 is mounted on the output shaft of the worm gear transmission mechanism. The worm gear transmission mechanism has a self-locking characteristic, meaning that when the worm stops rotating, the worm wheel will be locked and cannot rotate on its own. Therefore, when using a worm gear transmission mechanism as the spacing adjustment device 10, the displacement adjustment of the driven pressure roller 7 can be achieved through the rotational movement of the worm, and the position of the driven pressure roller 7 can be locked using the self-locking characteristic of the worm gear after adjustment. This eliminates the need for an additional locking device 12, ensuring the stability and safety of the pressing process. This design further simplifies the equipment structure and reduces manufacturing costs, but its drawback is that it cannot perform spacing adjustments with large rolling ratios, making it only suitable for production scenarios where the rolling ratio requirement is not high.

[0034] Furthermore, considering that the tension of the second transmission belt 4 will change accordingly after the distance between the active pressure roller 2 and the driven pressure roller 7 changes, this invention provides a belt tensioning device 8 on the frame 5. This belt tensioning device 8 includes a tensioning wheel 14. The frame 5 has a recessed hole 15 on one side of the pulley. The shaft of the tensioning wheel 14 is mounted in the recessed hole 15 via a bearing seat and can move along its length within the recessed hole 15 to accommodate the tensioning requirements after the distance between the active pressure roller 2 and the driven pressure roller 7 is adjusted. Additionally, a spring 17 is installed in the recessed hole 15. One end of the spring 17 rests against the bearing seat, and the other end is fixed to one end of the recessed hole 15 to apply a continuous preload to the tensioning wheel 14, ensuring that the second transmission belt 4 maintains appropriate tension during transmission and avoiding transmission instability and noise problems caused by belt slack or excessive tension.

[0035] In this embodiment, in order to further optimize the tensioning effect and performance of the belt tensioning device 8, an auxiliary tensioning wheel 13 with a fixed position is also provided on the upper frame corresponding to the upper position of the belt tensioning device 8 to cooperate with the adaptive tensioning wheel 14 to tension the second transmission belt 9. The setting of the auxiliary tensioning wheel can reduce the second transmission belt 9 from shifting or wearing due to uneven force during transmission, and further improve the stability and reliability of belt transmission.

[0036] In addition, by making the spring 17 inside the waist-shaped hole 15 an adjustable spring with an adjustable tension, the preload of the spring can be adjusted according to actual needs to adapt to the tension requirements under different working conditions.

[0037] In actual operation, when it is necessary to adjust the distance between the active pressure roller 2 and the driven pressure roller 7, the operator only needs to rotate the handwheel 11 and push or pull the second wedge block 19 through the threaded push rod 20, so that it slides on the inclined surface of the first wedge block 18, thereby realizing the adjustment of the distance.

[0038] After adjustment, the locking device 12 locks the positions of the driving pressure roller 2 and the driven pressure roller 7 to prevent them from shifting during operation. At this time, if the tension of the second transmission belt 4 changes, the tensioning wheel 14 in the belt tensioning device 8 will automatically adjust its position under the preload of the spring 17 to maintain the tension of the second transmission belt 4.

[0039] In this embodiment, a feeding hopper 1 is also provided on the upper support. The feeding hopper 1 is used to feed food blanks into the equipment before the pressing operation begins. The lower part of the feeding hopper is directly opposite the gap between the driving pressure roller 2 and the driven pressure roller 7 to ensure that the food blanks can fall accurately between the pressure rollers to achieve continuous pressing operation.

[0040] To further improve the efficiency and effectiveness of tablet compression, both the active pressure roller 2 and the driven pressure roller 7 in this invention are made of high-nickel-chromium-molybdenum alloy with a mirror finish, exhibiting excellent wear resistance and corrosion resistance, effectively extending the service life of the equipment. Preferably, the active pressure roller 2 and the driven pressure roller 7 have a diameter D ≥ 200 mm, a length L ≥ 300 mm, an alloy layer thickness of 30~35 mm, and a hardness HRC ≥ 55±1°. This design allows the pressure rollers to withstand greater pressure and friction, ensuring the stability and durability of the tablet compression operation.

[0041] Furthermore, both the driving pressure roller 2 and the driven pressure roller 7 are equipped with a rotary water-cooling system. This system includes water-cooling pipes, an inlet, and an outlet. The water-cooling pipes are arranged in a serpentine pattern along the length of the roller body to form an effective cooling loop. Cooling water continuously flows in from the inlet through an external circulating water system, passing through the pipes and exiting from the outlet, thus achieving continuous cooling of the pressure rollers. This design effectively prevents the pressure rollers from overheating due to prolonged operation, ensuring their stability and service life.

[0042] During the tableting process, in order to prevent food blanks from adhering to the surface of the pressure rollers, both the main driving pressure roller 2 and the driven pressure roller 7 are equipped with anti-stick pneumatic scrapers. These scrapers can automatically scrape off the material adhering to the roller surface as the pressure rollers rotate, thereby ensuring the cleanliness of the pressure rollers and the tableting effect.

[0043] The tablet press in this embodiment is also provided with a discharge plane 3, which is located on the side below the driven pressure roller. This facilitates the connection of an external material belt structure, so that the pressed thin food can be smoothly collected through the material belt structure, thereby realizing an automated production process and improving production efficiency.

[0044] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that these embodiments are for illustrative purposes only and are not intended to limit the scope of protection of this utility model. Furthermore, it should be understood that after reading the technical content of this utility model, those skilled in the art can make various alterations, modifications, and / or variations to this utility model, and all such equivalent forms also fall within the scope of protection defined by the appended claims.

Claims

1. A tablet press for processing thin-sheet food, characterized in that, Includes a frame and a combination of pressure rollers mounted on the frame; The combined pressure roller includes an active pressure roller and a driven pressure roller arranged opposite to each other. The active pressure roller is connected to a drive motor, and the driven pressure roller is connected to the active pressure roller through a belt pulley transmission mechanism, thereby realizing an indirect power connection with the drive motor. A spacing adjustment device is provided between the active pressure roller and the driven pressure roller. The spacing adjustment device is used to adjust the spacing between the active pressure roller and the driven pressure roller to meet the processing requirements of food blanks with different thicknesses and hardnesses. The frame is also equipped with a belt tensioning device, which is used to dynamically tension the belt on the pulley drive mechanism. The belt tensioning device includes a tensioning wheel. The frame has a recessed hole on one side of the pulley. The shaft of the tensioning wheel is installed in the recessed hole through a bearing seat and can move within the recessed hole for position adjustment. A spring is provided in the recessed hole, and the spring abuts against the bearing seat to apply preload.

2. The tablet press for processing thin-sheet food according to claim 1, characterized in that, The frame has outer protective plates on both sides of the corresponding combination of pressure rollers. The outer protective plates are detachable and cover the transmission structure of the equipment from the outside.

3. The tablet press for processing thin-sheet food according to claim 1, characterized in that, The active pressure roller and the driven pressure roller are mirror rollers formed of high nickel-chromium-molybdenum alloy. The diameter D of the active pressure roller and the driven pressure roller are ≥200mm, the length L is ≥300mm, the thickness of the alloy layer of the roller body is 30~35mm, and the hardness HRC is ≥55±1°.

4. The tablet press for processing thin-sheet food according to claim 1, characterized in that, Both the active and driven pressure rollers are equipped with a rotary water cooling system. The rotary water cooling system includes a water cooling pipe, an inlet, and an outlet. The water cooling pipe is a serpentine pipe that is arranged along the length of the roller body. The two ends of the water cooling pipe are connected to the inlet and the outlet, respectively. The inlet and outlet are connected to a circulating water circuit to cool the pressure rollers through circulating cooling water.

5. The tablet press for processing thin-sheet food according to claim 1, characterized in that, Both the active pressure roller and the driven pressure roller are equipped with anti-stick pneumatic scrapers.

6. The tablet press for processing thin-sheet food according to claim 1, characterized in that, The frame is formed with a horizontally arranged guide groove. The roller shafts of the active pressure roller and the driven pressure roller are assembled in the guide groove through bearing seats. The spacing adjustment device adjusts the spacing between the active pressure roller and the driven pressure roller by driving the roller shafts of the active pressure roller and the driven pressure roller to move towards each other in the guide groove.

7. The tablet press for processing thin-sheet food according to claim 1, characterized in that, The spacing adjustment device is a worm gear transmission mechanism. The driving pressure roller is fixedly mounted on the frame, while the driven pressure roller is mounted on the output shaft of the worm gear transmission mechanism. The displacement adjustment of the driven pressure roller is achieved through the rotational movement of the worm gear.

8. The tablet press for processing thin-sheet food according to claim 1, characterized in that, The spacing adjustment device includes a combined wedge block and a threaded push rod. The combined wedge block includes a first wedge block and a second wedge block whose inclined surfaces contact each other. The first wedge block is a fixed structural component, which is fixedly connected to the frame, while the second wedge block is a movable structural component, which is set in a horizontal guide groove and can be moved in position through the horizontal guide groove. The threaded push rod is a vertically set active structural component, whose top is assembled and connected to the handwheel, and whose bottom abuts against the top surface of the second wedge block. When the bearing housing of the driving pressure roller is assembled with the first wedge block, the second wedge block rests against the side of the bearing housing of the driven pressure roller on its back side; conversely, when the bearing housing of the driven pressure roller and the first wedge block are assembled with the same unit, the second wedge block rests against the side of the bearing housing of the driving pressure roller on its back side.

9. The tablet press for processing thin-sheet food according to claim 8, characterized in that, The spacing adjustment device is provided in two sets, which are respectively located on both sides of the frame.

10. The tablet press for processing thin-sheet food according to claim 1, characterized in that, The spring installed inside the waist-shaped hole is an adjustable spring with adjustable tension.

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