A blistering die for debubbling a carton

Abstract

The utility model relates to the field of packing box processing discloses a kind of packing box bubble-removing expansion mould, including mould base rack, movable mould cover and elastic expansion cavity, the top of mould base rack is equipped with driving mechanism;Movable mould cover is slidably connected on the mould base rack, and the output end of driving mechanism is connected in the upper end of movable mould cover;Elastic expansion cavity is sealingly connected in the lower end of movable mould cover, and the top of elastic expansion cavity is sealingly connected with air pipe, in working condition, the air pipe is communicated with vacuum pump or inflator pump.The utility model has the beneficial effect that the pain point that hard mould needs to be frequently replaced due to the shape of product is effectively solved, and the versatility and production efficiency of equipment are significantly improved.

Description

Technical Field

[0001] This utility model relates to the field of packaging box processing, specifically to a packaging box defoaming and expansion mold. Background Technology

[0002] Currently, after the paper-plastic composite box and laminated packaging box are formed, air bubbles are easily formed in the interlayer (such as between the paper and plastic layers, or between the laminate and the substrate) due to uneven pressure during material bonding, fluctuations in the amount of glue applied, or differences in lamination tension. This results in an uneven surface of the packaging box, poor bonding strength, and affects the appearance and service life of the product. Currently, the CN207772506U packaging box defoaming expansion mold is used to defoam before the glue solidifies. During defoaming, the mold is filled by the rising guide rod, thereby achieving defoaming and scraping. Since the mold size needs to be consistent with the inner diameter of the box, different shaped products require different mold shapes. Utility Model Content

[0003] The technical problem to be solved by this utility model is that existing packaging box defoaming and expansion molds require changing molds of different shapes for defoaming products of different shapes, resulting in low versatility. The purpose is to provide a packaging box defoaming and expansion mold that effectively solves the pain point of needing to frequently change hard molds due to the different shapes of products, and significantly improves the versatility of the equipment and production efficiency.

[0004] This utility model is achieved through the following technical solution: A defoaming expansion mold for packaging boxes includes a mold base frame, a movable mold cover, and an elastic expansion cavity. A drive mechanism is mounted on the top of the mold base frame. The movable mold cover is slidably connected to the mold base frame, and the output end of the drive mechanism is connected to the upper end of the movable mold cover. The elastic expansion cavity is sealed to the lower end of the movable mold cover, and an air pipe is sealed to the top of the elastic expansion cavity. In operation, the air pipe is connected to a vacuum pump or an inflation pump.

[0005] The beneficial effects of this invention are that by setting up an elastic expansion cavity and coordinating the alternating operation of a vacuum pump and an air pump, the movable mold cover can be lowered during operation, with the elastic expansion cavity positioned on packaging boxes of different shapes. The air pump then inflates the elastic expansion cavity, causing it to expand and apply pressure evenly to the sidewalls of the packaging box from the inside, eliminating air bubbles. After debubbling, the vacuum pump evacuates the elastic expansion cavity, causing it to contract and detach from the sidewalls of the packaging box, allowing it to reset for the next cycle. Throughout the process, the flexible elastic expansion cavity automatically adapts to the contours of products of different shapes, achieving multi-purpose use of a single mold. This effectively solves the pain point of frequently changing hard molds due to varying product shapes, significantly improving the equipment's versatility and production efficiency.

[0006] In some embodiments, the movable mold cover is in the shape of a rectangular plate, and its four corners are slidably connected to the mold base frame. By slidably connecting the four corners of the movable mold cover to the mold base frame, it is ensured that the mold cover is subjected to uniform force and runs smoothly during the lifting and lowering process, without tilting or jamming.

[0007] In some embodiments, the mold base frame includes a top plate, the drive mechanism is connected to the top of the top plate, and guide rods are vertically arranged at the four bottom corners of the top plate. The four corners of the movable mold cover are slidably connected to the guide rods. By setting a mold base frame with a top plate and four vertical guide rods, a precise and reliable guiding path is provided for the lifting and lowering of the movable mold cover, and the overall rigidity and stability of the frame are enhanced, enabling it to withstand various forces generated by the elastic expansion chamber during inflation, deflation, and compression.

[0008] In some embodiments, the device further includes four bushings. Each of the four corners of the movable mold cover has a through hole, and the bushings are installed in the corresponding through holes. The inner side of each bushing is slidably fitted onto the corresponding guide rod. Installing the bushings as sliding components on the movable mold cover, in cooperation with the guide rods, transfers sliding friction from the mold cover itself to the bushings, effectively reducing wear on both the mold cover and the guide rods. After long-term use, only the low-cost bushings need to be replaced to restore accuracy, thereby significantly extending the equipment's service life and reducing maintenance costs.

[0009] In some embodiments, each bushing has a connecting plate at its top, and each connecting plate has at least two connecting holes evenly distributed in a circle. The outer periphery of each through hole has a threaded hole aligned with the connecting hole. A connecting bolt passes through the connecting hole and engages with the corresponding threaded hole, fixing the bushing to the corresponding through hole in the top plate. By providing a connecting plate and evenly distributing the connecting holes and connecting bolts on it, a secure and centered installation of the bushing is achieved, ensuring uniform force distribution and preventing loosening or misalignment due to unilateral force during operation, thus guaranteeing the smooth sliding of the movable mold cover.

[0010] In some embodiments, each guide rod has a limiting part connected to its free end, the outer diameter of which is larger than the inner diameter of the bushing. Providing a limiting part at the free end of the guide rod prevents the movable mold cover from slipping off the upper end of the guide rod during lifting due to accidents (such as drive mechanism failure), avoiding the risk of the mold cover falling and damaging the product or equipment, and enhancing the safety and reliability of equipment operation.

[0011] In some embodiments, the bottom of the movable mold cover is provided with a mounting groove, which is rectangular and annular, and extends along the edge of the movable mold cover. The top of the elastic expansion cavity is open, and the top edge of the elastic expansion cavity is sealed within the mounting groove. By providing a rectangular annular mounting groove at the bottom of the movable mold cover and using a groove-type connection method compared to flat contact, the elastic expansion cavity can be fixed more effectively, and a more reliable sealing contact surface can be formed, fundamentally ensuring the airtightness of the working cavity.

[0012] In some embodiments, the elastic expansion cavity is sealed within the mounting groove by a silicone sealing strip. Sealing with a silicone sealing strip leverages the excellent flexibility, resilience, and aging resistance of silicone material to fully fill the microscopic gaps between the mounting groove and the elastic expansion cavity. This maintains a long-lasting and effective seal even under repeated deformation, further optimizing and ensuring the reliability of the seal—a crucial detail for guaranteeing the long-term stable operation of the equipment.

[0013] In some embodiments, a heating plate is also included, connected to the bottom of the movable mold cover and located at the top of the elastic expansion cavity, with a distance between the heating plate and the elastic expansion cavity. By setting the heating plate to increase the air temperature inside the elastic expansion cavity, the packaging box or its adhesive is heated. Heating can soften certain materials or activate heat-sensitive adhesives, resulting in better defoaming when pressure is applied to the elastic expansion cavity, thereby improving processing efficiency and the quality of the final product.

[0014] In some embodiments, the driving mechanism is a cylinder, which is vertically mounted on the top of the top plate. The piston rod of the cylinder is connected to the movable mold cover and located in the middle of the movable mold cover. Vertically mounting the cylinder in the middle of the top plate and connecting it to the middle of the movable mold cover provides driving force for the lifting and lowering of the movable mold cover, ensuring that the movable mold cover can be stably pressed and lifted.

[0015] Compared with the prior art, this utility model has the following advantages and beneficial effects: 1. During operation, the movable mold cover can be lowered, and the elastic expansion cavity is positioned on packaging boxes of different shapes. Then, the elastic expansion cavity is inflated by an air pump, causing it to expand and apply pressure evenly to the side wall of the packaging box from the inside, eliminating air bubbles. After debubbling, the vacuum pump evacuates the elastic expansion cavity, causing it to contract and thus detach from the side wall of the packaging box. Throughout the process, the flexible elastic expansion cavity can automatically adapt to the contours of different product shapes, realizing multi-purpose use of one mold. This effectively solves the pain point of frequently changing hard molds due to different product shapes, and significantly improves the versatility and production efficiency of the equipment.

[0016] 2. By setting a heating plate to increase the air temperature inside the elastic expansion chamber, the packaging box or its adhesive is heated. Heating can soften certain materials or activate heat-sensitive adhesives, resulting in better defoaming when pressure is applied to the elastic expansion chamber, thereby improving processing efficiency and the quality of the final product. Attached Figure Description

[0017] The accompanying drawings, which are included to provide a further understanding of the embodiments of the present invention and form part of this application, do not constitute a limitation thereof. In the drawings: Figure 1 This is a structural diagram of the elastic expansion cavity after it has been moved upwards; Figure 2 This is a structural diagram of the elastic expansion cavity after it has been moved downwards; Figure 3 This is a structural diagram of the movable mold cover.

[0018] The attached diagram shows the markings and corresponding component names: Mold base frame 10, guide rod 11, limiting part 111, top plate 12, mounting groove 121, cylinder 20, movable mold cover 30, mounting hole 301, bushing 31, air pipe 32, heating plate 33, elastic expansion cavity 40. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the embodiments and accompanying drawings. The illustrative embodiments and descriptions of this utility model are only used to explain this utility model and are not intended to limit this utility model.

[0020] Throughout this specification, references to "an embodiment," "an example," or "an example" mean that a particular feature, structure, or characteristic described in connection with that embodiment or example is included in at least one embodiment of the present invention. Therefore, the phrases "an embodiment," "an example," "an example," or "an example" appearing in various places throughout the specification do not necessarily refer to the same embodiment or example. Furthermore, specific features, structures, or characteristics can be combined in one or more embodiments or examples in any suitable combination and / or sub-combination. Moreover, those skilled in the art will understand that the illustrations provided herein are for illustrative purposes and are not necessarily drawn to scale. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0021] In the description of this utility model, the terms "front", "rear", "left", "right", "up", "down", "vertical", "horizontal", "high", "low", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the scope of protection of this utility model.

[0022] The terms "first," "second," etc., used in this utility model are merely for clarity of description and are not intended to limit any order or emphasize importance. Furthermore, the term "connection" as used herein, unless otherwise specified, can refer to a direct connection or an indirect connection via other components. Example

[0023] like Figures 1-3 As shown, this embodiment provides a defoaming expansion mold for packaging boxes, including a mold base frame 10, a movable mold cover 30, and an elastic expansion cavity 40. A drive mechanism is mounted on the top of the mold base frame 10. The movable mold cover 30 is slidably connected to the mold base frame 10, and the output end of the drive mechanism is connected to the upper end of the movable mold cover 30. The elastic expansion cavity 40 is sealed to the lower end of the movable mold cover 30, and an air pipe 32 is sealed to the top of the elastic expansion cavity 40. In operation, the air pipe 32 is connected to a vacuum pump or an air pump. Throughout the process, the flexible elastic expansion cavity 40 can automatically adapt to the contours of products with different shapes, achieving multi-purpose use of a single mold. This effectively solves the pain point of frequently changing hard molds due to the different shapes of products, significantly improving the versatility and production efficiency of the equipment.

[0024] See Figure 1 and Figure 3 The movable mold cover 30 is provided with a mounting hole 301 for mounting a pipe connector of the air pipe 32, and the pipe connector is sealed to the upper end of the mounting hole 301. One end of the air pipe 32 is sealed to the pipe connector, and the other end is connected to the pipeline of the vacuum pump and the pipeline of the air filling pump through a two-way valve.

[0025] See Figures 1-3 The movable mold cover 30 is rectangular in shape, and its four corners are slidably connected to the mold base frame 10. By slidably connecting the four corners of the movable mold cover 30 to the mold base frame 10, it is ensured that the mold cover is subjected to uniform force and runs smoothly during the lifting and lowering process, without tilting or jamming.

[0026] See Figures 1-2The mold base frame 10 includes a top plate 12, and the drive mechanism is connected to the top of the top plate 12. Guide rods 11 are vertically arranged at the four bottom corners of the top plate 12, and the four corners of the movable mold cover 30 are slidably connected to the guide rods 11. By setting the mold base frame 10 with the top plate 12 and four vertical guide rods 11, a precise and reliable guiding path is provided for the lifting and lowering of the movable mold cover 30, and the overall rigidity and stability of the frame are enhanced, enabling it to withstand various forces generated by the elastic expansion chamber 40 during inflation, deflation, and compression.

[0027] See Figures 1-2 The system also includes four bushings 31. Each of the four corners of the movable mold cover 30 has a through hole, and the bushings 31 are installed in the corresponding through holes. The inner side of each bushing 31 is slidably fitted onto the corresponding guide rod 11. By installing the bushings 31 as sliding components on the movable mold cover 30 and cooperating with the guide rods 11, sliding friction can be transferred from the mold cover itself to the bushings 31, effectively reducing wear on the two main components, the mold cover and the guide rods 11. After long-term use, only the low-cost bushings 31 need to be replaced to restore accuracy, thereby significantly extending the service life of the equipment and reducing maintenance costs.

[0028] See Figures 1-2 Each bushing 31 has a connecting plate on its top, and each connecting plate has at least two connecting holes evenly distributed in a circle. The outer periphery of each through hole has a threaded hole aligned with the connecting hole. A connecting bolt passes through the connecting hole and engages with the corresponding threaded hole, fixing the bushing 31 to the corresponding through hole in the top plate 12. By setting the connecting plate and evenly distributing the connecting holes and connecting bolts on it, a secure and centered installation of the bushing 31 is achieved, ensuring uniform force distribution on the bushing 31 and preventing it from loosening or tilting due to unilateral force during operation, thus ensuring the smooth sliding of the movable mold cover 30.

[0029] See Figures 1-2 Each guide rod 11 has a limiting part 111 connected to its free end. The outer diameter of the limiting part 111 is larger than the inner diameter of the bushing 31. The limiting part 111 at the free end of the guide rod 11 prevents the movable mold cover 30 from slipping off the upper end of the guide rod 11 during lifting due to accidents (such as drive mechanism failure), thus avoiding the risk of the mold cover falling and damaging the product or equipment, and enhancing the safety and reliability of the equipment operation.

[0030] See Figures 1-3The movable mold cover 30 has a mounting groove 121 at its bottom. The mounting groove 121 is rectangular and annular, and is located along the edge of the movable mold cover 30. The top of the elastic expansion cavity 40 is open, and the top edge of the elastic expansion cavity 40 is sealed within the mounting groove 121. By providing a rectangular annular mounting groove 121 at the bottom of the movable mold cover 30 and using a groove-type connection method compared to a flat fit, the elastic expansion cavity 40 can be fixed more effectively, and a more reliable sealing contact surface can be formed, fundamentally ensuring the airtightness of the working cavity.

[0031] See Figures 1-3 The elastic expansion cavity 40 is sealed within the mounting groove 121 by a silicone sealing strip. The silicone sealing strip allows for the efficient filling of the microscopic gaps between the mounting groove 121 and the elastic expansion cavity 40, taking advantage of the excellent flexibility, resilience, and aging resistance of silicone material. This ensures a long-lasting and effective seal even under repeated deformation, further optimizing and ensuring the reliability of the seal.

[0032] See Figures 1-3 The elastic expansion cavity 40 is made of silicone rubber with a Shore A hardness of 40° to 60°. This hardness range ensures that the cavity has both good deformation adaptability and sufficient strength to transmit expansion pressure. When installing the elastic expansion cavity 40, the top edge of the elastic expansion cavity 40 is first laid in the mounting groove 121, then a solid circular or rectangular silicone sealing strip is pressed on, and finally pressure is applied by the stainless steel pressure strip and its fastening bolts (such as M4 hexagon socket head cap screws) to tightly press the edge of the elastic expansion cavity 40 into the bottom of the mounting groove 121, forming a reliable seal.

[0033] See Figures 1-3 It also includes a heating plate 33, which is connected to the bottom of the movable mold cover 30 and located at the top of the elastic expansion cavity 40. A distance is provided between the heating plate 33 and the elastic expansion cavity 40. By setting the heating plate 33 to increase the air temperature inside the elastic expansion cavity 40, the packaging box or its adhesive is heated. Heating can soften certain materials or activate heat-sensitive adhesives, resulting in better defoaming when pressure is applied to the elastic expansion cavity 40, thereby improving processing efficiency and the quality of the final product.

[0034] Specifically, the heating plate 33 is mechanically fixed to the bottom of the movable mold cover 30 using high-temperature resistant screws to ensure reliable connection under long-term thermal cycling. The spacing is 10 mm to 20 mm to prevent localized overheating that could soften and age the cavity material. A thermal resistor is installed on the movable mold cover 30, with its temperature measuring end located inside and at the top of the elastic expansion cavity 40. The probe of the thermal resistor is sealed to the movable mold cover 30. During operation, the temperature of the elastic expansion cavity 40 is controlled between 40°C and 60°C. The heating plate 33 stops working when the temperature exceeds 60°C.

[0035] See Figures 1-3 The driving mechanism is a cylinder 20, which is vertically mounted on the top of the top plate 12. The piston rod of the cylinder 20 is connected to the movable mold cover 30 and located in the middle of the movable mold cover 30. The cylinder 20 is vertically mounted in the middle of the top plate 12 and connected to the middle of the movable mold cover 30 to provide driving force for the lifting and lowering of the movable mold cover 30, ensuring that the movable mold cover 30 can be stably pressed and lifted.

[0036] Specifically, the lower end of the piston rod of cylinder 20 is threadedly connected to the connecting block at the center of the upper surface of movable mold cover 30 via a fisheye connector. This design can compensate for minor coaxiality errors that may occur during installation and prevent the piston rod from being damaged by lateral forces.

[0037] In operation, cylinder 20 pushes the movable mold cover 30 downwards, allowing the elastic expansion cavity 40 to cover the product in the packaging box. The vacuum pump is then turned on, and the solenoid valve is switched to connect the air pipe 32 to the vacuum pump, evacuating the elastic expansion cavity 40 to cause it to contract and detach from the product, or to remain relaxed. The vacuum pump is then turned off, and the solenoid valve is switched to connect the air pipe 32 to the inflation pump, filling the elastic expansion cavity 40 with gas at a certain pressure, causing it to expand and apply uniform pressure to the side wall of the packaging box. The inflation pressure can be adjusted within the range of 0.1 MPa to 0.5 MPa depending on the product material and size. After degassing, the inflation pump is turned off, and the solenoid valve is switched back to connect the vacuum pump, briefly evacuating the vacuum to cause the elastic expansion cavity 40 to contract and detach from the product. The drive mechanism then lifts the movable mold cover 30 back to its original position.

[0038] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of this utility model. It should be understood that the above description is only a specific embodiment of this utility model and is not intended to limit the scope of protection of this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the scope of protection of this utility model.

Claims

1. A defoaming and expansion mold for packaging boxes, characterized in that, include: A mold base frame, wherein a drive mechanism is mounted on the top of the mold base frame; A movable mold cover is slidably connected to the mold base frame, and the output end of the drive mechanism is connected to the upper end of the movable mold cover. An elastic expansion chamber is sealed and connected to the lower end of the movable mold cover. An air pipe is sealed and connected to the top of the elastic expansion chamber. In the working state, the air pipe is connected to a vacuum pump or an air pump.

2. The packaging box defoaming and expansion mold according to claim 1, characterized in that, The movable mold cover is rectangular in shape, and its four corners are slidably connected to the mold base frame.

3. The packaging box defoaming and expansion mold according to claim 2, characterized in that, The mold base frame includes a top plate, the drive mechanism is connected to the top of the top plate, and guide rods are vertically arranged at the four corners of the bottom of the top plate. The four corners of the movable mold cover are slidably connected to the guide rods.

4. The packaging box defoaming and expansion mold according to claim 3, characterized in that, It also includes four bushings, and each of the four corners of the movable mold cover is provided with a through hole. The bushings are installed in the corresponding through holes, and the inner side of the bushings is slidably sleeved on the corresponding guide rod.

5. The packaging box defoaming and expansion mold according to claim 4, characterized in that, Each bushing is provided with a connecting plate at its top, and each connecting plate is provided with at least two connecting holes. The two connecting holes are evenly distributed in a circle. The outer periphery of the through hole is provided with a threaded hole that is aligned with the connecting hole. The connecting bolt passes through the connecting hole and engages with the corresponding threaded hole to fix the bushing to the corresponding through hole on the top plate.

6. The packaging box defoaming and expansion mold according to claim 4, characterized in that, Each guide rod has a limiting part connected to its free end, and the outer diameter of the limiting part is larger than the inner diameter of the bushing.

7. The packaging box defoaming and expansion mold according to claim 1, characterized in that, The bottom of the movable mold cover is provided with an installation groove, which is rectangular and ring-shaped and is provided along the edge of the movable mold cover. The top of the elastic expansion cavity is open, and the top edge of the elastic expansion cavity is sealed and connected to the installation groove.

8. The packaging box defoaming and expansion mold according to claim 7, characterized in that, The elastic expansion cavity is sealed and connected to the mounting groove by a silicone sealing strip.

9. The packaging box defoaming and expansion mold according to claim 1, characterized in that, It also includes a heating plate, which is connected to the bottom of the movable mold cover and located at the top of the elastic expansion cavity, with a set distance between the heating plate and the elastic expansion cavity.

10. The packaging box defoaming and expansion mold according to claim 3, characterized in that, The driving mechanism is a cylinder, which is vertically installed on the top of the top plate. The piston rod of the cylinder is connected to the movable mold cover and located in the middle of the movable mold cover.

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