Practical heating mechanism of an aluminum plastic packaging machine

Abstract

The utility model relates to packaging machine equipment technical field discloses a practical heating mechanism of aluminium -plastic packaging machine. In the utility model, be provided with conveying device, heating part and forming part. Conveying device contains unwinding roller and take -up roller, realizes workpiece continuous conveying, heating part sets up opposite upper and lower heating plate, workpiece only contacts with lower heating plate under non -processing state, and upper heating plate matches lifting drive arrangement control heating, and lower heating plate both sides drive cylinder jacking workpiece through pusher, drive shaft, turning plate, avoid sticking together, and forming part completes workpiece forming through first, second mould cooperation. Still can set up heat insulating plate and reduce heat loss, spacing ring adapts to different width workpiece, and the male die is equipped with heating part in and guarantees forming temperature, and spacing plate ensures heating stability. The mechanism can improve heating forming efficiency and stability, enhance adaptability, and guarantee product quality.

Description

Technical Field

[0001] This utility model relates to the field of packaging machine equipment technology, and in particular to a practical heating mechanism for an aluminum-plastic packaging machine. Background Technology

[0002] In the field of pharmaceutical inner packaging production, aluminum-plastic packaging machines are key equipment for achieving the moisture-proof and protective functions of pharmaceuticals. One of the core processes involves heating PVC sheets and then blowing them with compressed air to form blister packs suitable for tablets or capsules, which are then sealed with aluminum foil under pressure to form a blister pack. However, the heating structure of existing aluminum-plastic packaging machines has significant technical defects. During the heating process, the overall temperature distribution of the heating plate is prone to unevenness, and the PVC sheet and the heating plate are mostly in static contact within the heating area. Under high heating temperatures, the PVC sheet softens and easily sticks to the surface of the heating plate. During subsequent traction and conveying, the stuck PVC sheet will bend, wrinkle, and deform due to the pulling action. This not only seriously affects the appearance flatness and dimensional accuracy of the final blister pack but also leads to a large number of defective products, significantly increasing production costs and reducing overall production efficiency, making it difficult to meet the actual needs of mass production and high-quality pharmaceutical inner packaging.

[0003] Chinese patent CN217575909U discloses an aluminum-plastic packaging machine forming device. This device reduces the resistance during traction by connecting a pad to the lower forming module to shorten the height difference between the heating module platform and the forming module platform. It also achieves precise adjustment of the position of the upper forming module by adding a scale to the fixing column of the forming module, thereby reducing adjustment time and ensuring the airtightness of the blister pack.

[0004] However, the improvement direction of the existing technology focuses on reducing traction resistance and optimizing the adjustment efficiency of the forming module. Its core solution is to address the issues of blister airtightness and adjustment time. It does not provide an effective solution to the problems of adhesion and traction deformation caused by uneven heating and static contact between the PVC board and the heating plate during the heating process. In other words, the improvements of the existing technology for aluminum-plastic packaging machines still do not cover the core technical pain point of PVC board adhesion to the heating plate, which affects product quality and production efficiency.

[0005] Therefore, researching a practical heating mechanism for aluminum-plastic packaging machines that effectively solves the problems of adhesion and uneven heating of PVC boards during heating remains a technical challenge that urgently needs to be overcome in the field of heating devices for aluminum-plastic packaging machines. Utility Model Content

[0006] The purpose of this utility model is to solve the problems existing in the prior art and to propose a practical heating mechanism for an aluminum-plastic packaging machine.

[0007] To achieve the above objectives, the present invention adopts the following technical solution: A practical heating mechanism for an aluminum-plastic packaging machine includes a conveying device for conveying workpieces. The conveying device includes an unwinding roller and a rewinding roller, with a heating section and a forming section arranged sequentially between the unwinding roller and the rewinding roller. The heating section includes an upper heating plate and a lower heating plate, which are arranged opposite each other and positioned above and below the workpiece, respectively. The lower heating plate has a mounting bracket at its end away from the workpiece. Pushing devices are provided on both sides of the bottom of the lower heating plate, with the output end of each pushing device connected to a drive shaft. A rotating plate is hinged to the drive shaft at its end away from the pushing device. A guide plate is provided in the middle of the rotating plate, and a retaining plate is provided at its end away from the rotating plate. The retaining plate is connected to the lower heating plate. A roller is arranged between the two rotating plates, and the roller contacts the workpiece. The forming section includes a first mold and a second mold, which are arranged opposite each other and positioned above and below the workpiece, respectively. A driving component is provided at the end of the first mold away from the workpiece.

[0008] Preferably, both the upper heating plate and the lower heating plate are fitted with heat insulation plates.

[0009] Preferably, the lifting drive device is a cylinder.

[0010] Preferably, both ends of the outer circumferential surface of the roller are fitted with limiting rings, which are coaxially arranged with the roller and fit against the outer circumferential surface of the roller; the limiting rings can be adjusted and fixed along the axial direction of the roller to accommodate workpieces of different widths.

[0011] Preferably, the pushing device is a push rod motor, and the cylinder of the push rod motor is fixedly installed on one side of the lower heating plate. When the push rod motor pushes the drive shaft to reciprocate in the horizontal direction, it drives the rotating plate to swing up and down with its hinge point with the guide plate as the axis, and the workpiece is peeled off from the lower heating plate by pushing the workpiece upward through the roller.

[0012] Preferably, the first mold has a plurality of punches at one end near the workpiece, and the second mold has a recess at one end near the workpiece, wherein the recesses correspond one-to-one with the punches and are adapted to each other.

[0013] Preferably, a heating element is provided inside the punch.

[0014] Preferably, limit plates are provided on the upper surfaces of both sides of the lower heating plate.

[0015] Compared with the prior art, the beneficial effects of this utility model are: This invention utilizes a linkage structure comprised of a pushing device, a drive shaft, a rotating plate, a guide plate, and a roller. Driven by the pushing device, the rotating plate can stably oscillate in a vertical plane around its hinge point with the guide plate, driving the roller to move up and down. This achieves active separation of the heated workpiece from the lower heating plate, fundamentally preventing adhesion caused by continuous contact between the workpiece and the heating plate. This reduces workpiece deformation and scrap due to adhesion and traction, lowers the scrap rate, and ensures the integrity of the workpiece's appearance and dimensional accuracy. The lifting drive device of the upper heating plate, positioned away from the workpiece end, allows for flexible adjustment of the distance between the upper heating plate and the workpiece, ensuring the workpiece remains in a non-processed state. In this state, the heating plate only contacts the lower heating plate, reducing unnecessary contact area between the workpiece and the heating plate to lower the risk of adhesion during non-processing stages. It can also precisely control the heating distance between the upper and lower heating plates according to the differences in workpiece thickness, material and other specifications, improving the versatility and adaptability of the mechanism. The upper and lower heating plates in the heating section are arranged opposite each other and correspond to the upper and lower surfaces of the workpiece respectively, which can form bidirectional uniform heating of the workpiece, ensuring the consistency of workpiece heating, avoiding the difference in the degree of workpiece softening caused by uneven local heating, providing a stable preheated workpiece for the subsequent precise forming section, reducing forming defects and improving the quality stability of the formed workpiece. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of a practical heating mechanism for an aluminum-plastic packaging machine proposed in this utility model; Figure 2 This is a schematic diagram of the heating section structure of a practical heating mechanism for an aluminum-plastic packaging machine proposed in this utility model; Figure 3 This is a schematic diagram of the forming part structure of a practical heating mechanism for an aluminum-plastic packaging machine proposed in this utility model; Figure 4 This is a schematic diagram showing the connection between the heating plate and the heat insulation plate of a practical heating mechanism for an aluminum-plastic packaging machine proposed in this utility model. Figure 5 This is a schematic diagram of the punch and cavity structure of a practical heating mechanism for an aluminum-plastic packaging machine proposed in this utility model.

[0017] In the diagram: 1. Conveying device; 2. Unwinding roller; 3. Rewinding roller; 4. Heating section; 5. Upper heating plate; 6. Lower heating plate; 7. Lifting drive device; 8. Mounting frame; 9. Pushing device; 10. Drive shaft; 11. Rotating plate; 12. Guide plate; 13. Fixing plate; 14. Roller; 15. Forming section; 16. First mold; 17. Second mold; 18. Drive component; 19. Heat insulation plate; 20. Limiting ring; 21. Heating component; 22. Limiting plate; 23. Punch; 24. Cavity. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0019] Reference Figures 1-5 A practical heating mechanism for an aluminum-plastic packaging machine includes a conveying device 1 for conveying workpieces. The conveying device 1 includes an unwinding roller 2 and a winding roller 3. A heating section 4 and a forming section 15 are sequentially arranged between the unwinding roller 2 and the winding roller 3. The heating section 4 includes an upper heating plate 5 and a lower heating plate 6, which are arranged opposite to each other, above and below the workpiece, respectively. When the workpiece is not being processed, it only contacts the lower heating plate 6. The upper heating plate 5 has a lifting drive device 7 at the end away from the workpiece, and the lower heating plate 6 has a mounting bracket 8 at the end away from the workpiece. Pushing devices are provided on both sides of the bottom of the lower heating plate 6. 9. The output end of the pushing device 9 is connected to the drive shaft 10. The drive shaft 10 has a rotating plate 11 hinged at the end away from the pushing device 9. A guide plate 12 is provided in the middle of the rotating plate 11. A retaining plate 13 is provided at the end of the guide plate 12 away from the rotating plate 11. The retaining plate 13 is connected to the lower heating plate 6. A roller 14 is provided between the two rotating plates 11. The roller 14 is in contact with the workpiece. The forming part 15 includes a first mold 16 and a second mold 17. The first mold 16 and the second mold 17 are arranged opposite each other and are respectively located above and below the workpiece. A driving member 18 is provided at the end of the first mold 16 away from the workpiece.

[0020] In the example of this application, the linkage structure consisting of the pushing device 9, drive shaft 10, rotating plate 11, guide plate 12, and roller 14, driven by the pushing device 9, allows the rotating plate 11 to swing stably in the vertical plane around its hinge point with the guide plate 12, driving the roller 14 to move up and down. This achieves active separation of the heated workpiece from the lower heating plate 6, fundamentally avoiding adhesion caused by continuous contact between the workpiece and the heating plate, reducing workpiece deformation and scrap due to adhesion and traction, lowering the scrap rate, and ensuring the integrity of the workpiece's appearance and dimensional accuracy. The lifting drive device 7 of the upper heating plate 5, which is away from the workpiece end, can flexibly adjust the distance between the upper heating plate 5 and the workpiece, making... In the non-processing state, the workpiece only contacts the lower heating plate 6, reducing the unnecessary contact area between the workpiece and the heating plate to reduce the risk of adhesion during the non-processing stage. It can also precisely control the heating distance between the upper and lower heating plates 6 according to the differences in workpiece thickness, material and other specifications, improving the versatility and adaptability of the mechanism. The upper and lower heating plates 6 in the heating section 4 are arranged opposite each other and correspond to the upper and lower surfaces of the workpiece respectively, which can form bidirectional uniform heating of the workpiece, ensuring the consistency of workpiece heating, avoiding the difference in the degree of workpiece softening caused by uneven local heating, providing a stable preheated workpiece for the subsequent precise forming of the forming section 15, reducing forming defects and improving the quality stability of the formed workpiece.

[0021] In this case, the workpiece is in contact with the lower heating plate 6 only when it is not being processed.

[0022] In the example of this application, both the upper heating plate 5 and the lower heating plate 6 are fitted with heat insulation plates 19.

[0023] As a preferred example of this utility model, the upper heating plate 5 and the lower heating plate 6 are fitted with a heat insulation plate 19, which can effectively reduce the heat loss of the heating plate and save energy consumption; at the same time, it can prevent the high temperature of the heating plate from being directly conducted to the surrounding components, prevent the surrounding components from being damaged by high temperature, extend the service life of the equipment, and improve the safety of equipment operation.

[0024] In the example of this application, the lifting drive device 7 is a cylinder.

[0025] As a preferred example of this utility model, the lifting drive device 7 uses a cylinder, which has the characteristics of fast response speed and stable driving force. It can accurately control the lifting action and position of the upper heating plate 5, ensure the accuracy of the heating distance between the upper heating plate 5 and the workpiece, thereby ensuring the stability of the heating effect and improving the heating accuracy.

[0026] In the example of this application, both ends of the outer peripheral surface of the roller 14 are fitted with limiting rings 20. The limiting rings 20 are coaxially arranged with the roller 14 and fit against the outer peripheral surface of the roller 14. The limiting rings 20 can be adjusted and fixed along the axial direction of the roller 14 to accommodate workpieces of different widths.

[0027] As a preferred example of this utility model, the limiting rings 20 at both ends of the outer circumference of the roller 14 can limit the workpiece in the width direction during the conveying process to prevent the workpiece from shifting during conveying; and the limiting rings 20 can be adjusted and fixed along the axial direction of the roller 14 to adapt to workpieces of different widths, thereby enhancing the adaptability of the heating mechanism to workpieces of different specifications and improving the versatility of the equipment.

[0028] In the example of this application, the pushing device 9 is a push rod motor, and the cylinder of the push rod motor is fixedly installed on one side of the lower heating plate 6. When the push rod motor pushes the drive shaft 10 to reciprocate in the horizontal direction, it drives the rotating plate 11 to swing up and down with its hinge point with the guide plate 12 as the axis, and pushes the workpiece upward through the roller 14 to separate the workpiece from the lower heating plate 6.

[0029] As a preferred example of this utility model, the pushing device 9 adopts a push rod motor, which has high driving precision and stable and reliable operation. By pushing the drive shaft 10 to reciprocate, it drives the rotating plate 11 to swing up and down around the hinge point with the guide plate 12. This can accurately control the pushing force and amplitude of the roller 14 on the workpiece, effectively realize the separation of the workpiece from the lower heating plate 6, avoid workpiece conveying jams or damage caused by adhesion, and ensure the continuity of the production process.

[0030] In the example of this application, the first mold 16 is provided with a plurality of punches 23 at one end near the workpiece, and the second mold 17 is provided with a recess 24 at one end near the workpiece, and the recess 24 corresponds to and is adapted to the punches 23 one by one.

[0031] As a preferred example of this utility model, the punch 23 of the first mold 16 and the cavity 24 of the second mold 17 correspond one-to-one and are adapted to each other, which can form a precise forming constraint on the heated workpiece during the forming process, ensure the shape and size accuracy of the formed workpiece, and improve the forming quality of aluminum-plastic packaging.

[0032] In the example of this application, a heating element 21 is provided inside the punch 23.

[0033] As a preferred example of this utility model, a heating element 21 is provided inside the punch 23, which can heat the punch 23 during the molding process. This allows the punch 23 to continuously provide heat to the workpiece when in contact with it, preventing the workpiece from being affected by cooling and ensuring that the workpiece is molded at a suitable temperature, thereby further improving the molding quality and molding efficiency.

[0034] The heating element 21 is a flexible heating sheet, specifically a silicone heating sheet or a polyimide heating sheet. Both silicone heating sheets and polyimide heating sheets are existing technologies and will not be described in detail here.

[0035] Preferably, limit plates 22 are provided on the upper surfaces of both sides of the lower heating plate 6.

[0036] As a preferred example of this utility model, the limiting plates 22 on both sides of the upper surface of the lower heating plate 6 can limit the workpiece in the width direction during the heating process, prevent the workpiece from shifting due to conveying or heating deformation, ensure the uniformity of contact between the workpiece and the lower heating plate 6, ensure uniform heating, and provide a guarantee for the accuracy of subsequent forming.

[0037] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A practical heating mechanism for an aluminum-plastic packaging machine, characterized in that: The device includes a conveying device (1) for conveying workpieces. The conveying device (1) includes an unwinding roller (2) and a winding roller (3). A heating part (4) and a forming part (15) are arranged sequentially between the unwinding roller (2) and the winding roller (3). The heating part (4) includes an upper heating plate (5) and a lower heating plate (6). The upper heating plate (5) and the lower heating plate (6) are arranged opposite to each other, respectively above and below the workpiece. The upper heating plate (5) is provided with a lifting drive device (7) at the end away from the workpiece. The lower heating plate (6) is provided with a mounting bracket (8) at the end away from the workpiece. Pushing devices (9) are provided on both sides of the bottom of the lower heating plate (6). The output end of the pushing device (9) is connected to the drive shaft (10). A rotating plate (11) is hinged at the end of the drive shaft (10) away from the pushing device (9). A guide plate (12) is provided in the middle of the rotating plate (11). A fixing plate (13) is provided at the end of the guide plate (12) away from the rotating plate (11). The fixing plate (13) is connected to the lower heating plate (6). A roller (14) is provided between the two rotating plates (11). The roller (14) is in contact with the workpiece. The forming part (15) includes a first mold (16) and a second mold (17). The first mold (16) and the second mold (17) are arranged opposite to each other, respectively above and below the workpiece. The first mold (16) has a driving member (18) at the end away from the workpiece.

2. The practical heating mechanism of an aluminum-plastic packaging machine according to claim 1, characterized in that, Both the upper heating plate (5) and the lower heating plate (6) are fitted with heat insulation plates (19).

3. The practical heating mechanism of an aluminum-plastic packaging machine according to claim 1, characterized in that, The lifting drive device (7) is a cylinder.

4. The practical heating mechanism of an aluminum-plastic packaging machine according to claim 1, characterized in that, Both ends of the outer circumferential surface of the roller (14) are fitted with limiting rings (20). The limiting rings (20) are coaxially arranged with the roller (14) and fit against the outer circumferential surface of the roller (14). The limiting rings (20) can be adjusted and fixed along the axial direction of the roller (14) to accommodate workpieces of different widths.

5. The practical heating mechanism of an aluminum-plastic packaging machine according to claim 1, characterized in that, The pushing device (9) is a push rod motor, and the cylinder of the push rod motor is fixedly installed on one side of the lower heating plate (6).

6. The practical heating mechanism of an aluminum-plastic packaging machine according to claim 1, characterized in that, The first mold (16) has a plurality of punches (23) at one end near the workpiece, and the second mold (17) has a recess (24) at one end near the workpiece, and the recess (24) corresponds to and is compatible with the punches (23).

7. The practical heating mechanism of an aluminum-plastic packaging machine according to claim 6, characterized in that, The punch (23) is equipped with a heating element (21).

8. The practical heating mechanism of an aluminum-plastic packaging machine according to claim 6, characterized in that, Limiting plates (22) are provided on the upper surfaces of both sides of the lower heating plate (6).

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