A bottom pasting and pressing forming device and a pressing forming method of a full-automatic carton machine

Abstract

The application discloses a bottom-pasting and pressing forming device and a pressing forming method of a full-automatic carton machine, and relates to the technical field of carton machines. The bottom-pasting and pressing forming device of the full-automatic carton machine comprises a hot pressing assembly, a combination assembly and a lifting assembly. The hot pressing assembly comprises a pressing assembly and a heating assembly, the heating assembly is used for heating the pressing assembly, the combination assembly is provided with a plurality of combination grooves on a rotating disc, and the combination grooves are used for placing a carton frame and a carton bottom. The lifting assembly is used for controlling the lifting and lowering of the pressing assembly. The pressing assembly comprises a mounting plate and a hot pressing plate, the hot pressing plate is fixed to the bottom of the mounting plate, and the lifting assembly is connected with the mounting plate. The application introduces a temperature control hot pressing system when pressing the carton frame and the carton bottom, the pressing assembly is heated through the heating assembly, the glue curing can be accelerated and the adhesion can be enhanced, the problem of unreal pasting after the glue drying is effectively avoided, therefore, the pressing forming device reduces the probability of the quality problems of glue opening and wave lines, and thus the waste rate of carton production is reduced.

Description

Technical Field

[0001] This application relates to the field of carton machine technology, and in particular to a bottom-sealing pressing and forming device and pressing and forming method for a fully automatic carton machine. Background Technology

[0002] Carton packaging machines are specialized packaging equipment used in the tobacco industry. Their core function is to automatically pack 10 small packs of cigarettes into a "carton" (either a hard pack or a soft pack) and complete the carton forming, filling, and initial sealing. They are key equipment in the cigarette packaging production line.

[0003] The carton consists of a carton frame and a carton base. During production, it undergoes processes such as feeding, gluing, drying, paper folding, and ribbon finishing. Finally, the separate carton frames and bases are glued together. However, due to the preceding steps, the processing of each carton frame and base varies, leading to inconsistent quality in the final assembly step. This can result in issues like glue separation and wavy textures, increasing the scrap rate and production costs. Summary of the Invention

[0004] In view of the deficiencies in the existing technology, the technical problem to be solved by this application is: how to reduce the scrap rate in carton production.

[0005] To achieve the above objectives, firstly, the bottom-pressing and forming device for the fully automatic carton machine provided in this application includes: A hot-pressing assembly, comprising a pressing assembly and a heating assembly, wherein the heating assembly is used to heat the pressing assembly; The assembly includes a turntable and multiple combination slots on the turntable for placing the strip box frame and the strip box bottom. The lifting assembly is used to control the raising and lowering of the pressing assembly; The pressing assembly includes a mounting plate and a hot press plate, with the hot press plate fixed to the bottom of the mounting plate, and the lifting assembly connected to the mounting plate.

[0006] By adopting the above technical solution, a temperature-controlled hot-pressing system is introduced when pressing the strip box frame and bottom. Heating the pressing components with heating elements accelerates adhesive curing and enhances bonding strength, effectively preventing the problem of incomplete adhesion after the adhesive dries. Using a mounting plate as the carrier connecting the lifting components and a hot-pressing plate as the direct hot-pressing execution end, a standard modified clamp made of heat-transfer material better conforms to the characteristics and dimensions of the strip box product, ensuring uniform pressure transmission and stable temperature output. Therefore, this pressing and molding device reduces the probability of adhesive failure and wavy texture quality problems, thereby reducing the scrap rate in strip box production.

[0007] In one embodiment, the hot press plate is mapped onto the overlapping area of ​​the carton frame and the bottom of the carton. The bottom of the mounting plate includes a first area and a second area. The hot press plate is mounted on the first area, and the second area abuts against the top surface of the carton frame.

[0008] By adopting the above technical solution, during the pressing process, the second area at the bottom of the mounting plate will abut against and apply pressure to the top side of the carton. Although the mounting plate itself does not actively heat up, the heat from the hot press plate will be transferred to the mounting plate, giving it some heat. Thus, during the pressing of the carton, the residual heat from the heat transfer will be used to assist in pressing the top side of the carton, further strengthening the adhesion effect of the top side of the carton and improving the overall forming quality.

[0009] In one embodiment, the bottom surface of the hot press plate abuts against the overlapping area, and the side surface of the hot press plate abuts against the inner side surface of the box frame.

[0010] By adopting the above technical solution, the hot press plate can simultaneously limit and heat the overlapping area at the bottom and the sides, ensuring that the carton frame and the bottom of the carton are precisely aligned and tightly fitted in three-dimensional space, preventing the cardboard from shifting during the pressing process, and further eliminating the generation of wavy lines after molding.

[0011] In one embodiment, the bottom of the hot press plate includes a third region and a fourth region, the third region abutting against the overlapping region, and the fourth region having a groove.

[0012] By adopting the above technical solution, the groove in the fourth region avoids the non-pressing area. That is, the center of the hot press plate has a hole / groove and is not heated, so that the hot press plate only makes precise contact and heats the overlapping areas to be pressed on the periphery. This avoids thermal damage to the ineffective area in the center of the carton, resulting in higher edge bonding quality and saving energy consumption.

[0013] In one embodiment, the bottom surface of the groove has multiple insulating grooves, which are used to impede heat conduction in the groove.

[0014] By adopting the above technical solution, the isolation groove effectively reduces the conduction of heat to the inside of the groove and the central area, further ensuring that the heat is highly concentrated in the surrounding area that needs to be pressed, improving the control accuracy of local temperature, and avoiding deformation of the central area due to unnecessary heat accumulation.

[0015] In one embodiment, the hot press plate has a plurality of mounting holes on its side, and the heating assembly includes a heating rod and an electric heating controller. The heating rod is disposed inside the mounting hole, and the electric heating controller is electrically connected to the heating rod.

[0016] By adopting the above technical solution, a high-precision temperature control system is formed through the cooperation of an electric heating controller and a heating rod. Operators can freely adjust and precisely control the temperature according to the characteristics of different products, ensuring that the bottom heat pressing is performed at the optimal temperature, which greatly improves the adaptability of production and the stability of adhesion.

[0017] In one embodiment, a telescopic groove is provided around the inner wall of the combination groove, and a support frame is telescopically provided in the telescopic groove. The support frame divides the internal space of the combination groove into an upper placement space and a lower placement space. The upper placement space is used to place the strip box frame, and the lower placement space is used to place the strip box bottom. A pressure sensor is provided on the contact surface between the support frame and the pressing component.

[0018] By adopting the above technical solution, the strip box frame and the bottom of the strip box are separated before the pressing action is performed, so as to avoid premature contact that would cause the glue to misalign and stick together; the pressure sensor can accurately sense the pressing force of the pressing component, and provide an accurate automatic trigger signal for the subsequent support frame to retract.

[0019] Secondly, the bottom-pressing molding method of the fully automatic carton machine provided in this application includes the following steps: Provides a bottom-pressing and forming device for the fully automatic carton machine; Place the strip box frame and strip box bottom inside the assembly slot; Move the combination slot to the preset position using the turntable; The pressing component is heated by the heating component; The pressing component is lowered via the lifting component to press the strip box frame and the bottom of the strip box together until the preset pressing time is reached; Complete the pressing of one set of carton frames and carton bottoms, and then proceed to the pressing of the next set of carton frames and carton bottoms.

[0020] By adopting the above technical solution, a complete and automated constant-temperature hot pressing process for bottom bonding is provided. Combining physical hot pressing equipment with automated processes not only significantly improves the production line efficiency but also fundamentally ensures a high degree of consistency in the pressing quality of each batch of products, reducing the scrap rate.

[0021] In one embodiment, the pressing component is lowered via the lifting component to press the strip box frame and the strip box bottom together until a preset pressing time is reached, specifically including: The pressing component is inserted into the combination groove by the lifting component, and the pressing component squeezes the support frame. When the pressure sensor reading exceeds the threshold, the support frame retracts into the telescopic groove, and the bar box frame contacts the bottom of the bar box. The pressing component continues to move downwards, pressing the strip box frame and the strip box bottom together at the bottom of the assembly groove until the preset pressing time is reached.

[0022] By employing the above technical solution, the timing of the support frame's retraction is precisely controlled using a pressure sensor threshold, ensuring that the carton frame only contacts the bottom of the carton after receiving stable downward pressure from the pressing component. This dynamic bonding process eliminates air pockets and prevents positional shifts, resulting in a smoother and tighter bottom bonding and eliminating quality issues caused by misalignment.

[0023] In summary, this application includes at least one of the following beneficial technical effects: 1. This application introduces a temperature control system with adjustable temperature in the bottom bonding process, and uses a standard hot pressing component made of heat transfer material to accelerate and stabilize the drying and bonding process of the adhesive. Therefore, the pressing and molding device reduces the probability of quality problems such as glue separation and wavy texture, thereby reducing the scrap rate of the carton production. 2. The hot press plate features a groove / hole design in the center, which concentrates the heating area on the periphery where the box frame and the bottom sticker overlap, without heating the center, thus preventing the cardboard from deforming due to heat. At the same time, the mounting plate can abut against the top side of the box during pressing, using the residual heat from heat conduction to enhance the adhesion of the top of the box, achieving targeted high-quality hot pressing. 3. By installing a retractable support frame with a pressure sensor in the combination slot, the strip box frame and the strip box bottom are physically isolated before pressing. The two are only allowed to contact and press together after the pressing component presses down to reach the set pressure threshold, which ensures precise alignment at the moment of contact, avoids misalignment and adhesion, and greatly improves the product yield. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the bottom bonding and forming device of the fully automatic carton machine according to an embodiment of this application; Figure 2 This is a schematic diagram of the pressing component in an embodiment of this application; Figure 3 This is a schematic diagram of the combined groove structure according to an embodiment of this application; Figure 4 This is a schematic diagram of the structure of the bar box frame and the bar box bottom according to an embodiment of this application.

[0025] In the diagram: 1-Heating component, 2-Pressing component, 201-Mounting plate, 202-Hot press plate, 2021-Third area, 2022-Fourth area, 2023-Groove, 203-Mounting hole, 204-Isolation groove, 3-Combination groove, 301-Telescopic groove, 302-Support frame, 303-Upper placement space, 304-Lower placement space, 4-Turntable, 5-Lifting component, 6-Strip box frame, 7-Strip box bottom. Detailed Implementation

[0026] The embodiments of this application will be further described in detail below with reference to the accompanying drawings. Example 1

[0027] This application provides a bottom-pressing and forming device for a fully automatic carton machine. See also: Figures 1 to 4 As shown, the bottom-pressing and forming device of this fully automatic carton machine mainly includes a combination assembly, a hot-pressing assembly, and a lifting assembly 5. The combination assembly includes a turntable 4 that can rotate around a vertical axis and multiple combination slots 3 arranged in a circular array on the turntable 4. The combination slots 3 are used to place the carton frame 6 and the carton bottom 7 to be pressed from top to bottom, respectively. The lifting assembly 5 can typically use a servo motor paired with a ball screw module, or a cylinder mechanism, with its output end set vertically downwards to precisely control the rising and falling movements of the hot-pressing assembly.

[0028] In one embodiment, see Figure 2 As shown, the hot pressing assembly includes a pressing component 2 and a heating component 1. The pressing component 2 further includes a mounting plate 201 and a hot pressing plate 202. Specifically, the top of the mounting plate 201 is rigidly connected to the output end of the lifting component 5 via a flange or bolts to ensure stability during the pressing process; the hot pressing plate 202 is fixed to the bottom of the mounting plate 201 by countersunk screws. To enable this device to be modified as a standard fixture and to fit the characteristics and dimensions of different carton products, the hot pressing plate 202 is preferably made of a heat transfer material with excellent thermal conductivity, such as aluminum alloy or copper, and can be customized and replaced according to the size of different carton models.

[0029] Furthermore, the vertical projection of the hot press plate 202 is mapped onto the overlapping area of ​​the carton frame 6 and the carton bottom 7, i.e., the area requiring adhesive application and pressing. The bottom surface of the mounting plate 201 is divided into a first region and a second region, wherein the first region is located in the center and protrudes downward to mount the hot press plate 202; the second region is distributed in a ring around the periphery of the first region. When the lifting assembly 5 drives the pressing assembly 2 to press down, the second region will abut against the top surface of the carton frame 6.

[0030] During the pressing process, although the mounting plate 201 itself does not have an active heating function, the heat from the hot press plate 202 is transferred to the mounting plate 201 through metal conduction, giving the mounting plate 201 a certain amount of residual heat. At this time, the second area is pressed down and abuts against the top side of the cardboard box, using this residual heat to assist in ironing and pressing the top side of the cardboard box, effectively strengthening the overall adhesion of the top side of the cardboard box.

[0031] To achieve precise edge heating and protect the center of the box, the bottom shape of the hot press plate 202 is designed to include a third region 2021 and a fourth region 2022. The third region 2021 is located on the outer periphery of the bottom of the hot press plate 202, and its bottom plane directly abuts against the overlapping area of ​​the strip box frame 6 and the strip box bottom 7; the fourth region 2022 is located at the center of the bottom of the hot press plate 202 and is recessed inward to form a clearance groove 2023, which is the hole in the center of the heating plate.

[0032] This structural design ensures that only the periphery of the hot press plate 202, i.e., the third region 2021, contacts and conducts heat to the area to be pressed, while the center area does not have physical contact or receive heat. This avoids wavy deformation caused by ineffective heating in the center area of ​​the cardboard, resulting in higher pressing quality at the periphery glue bonding area.

[0033] Preferably, see Figure 2 As shown, in order to further prevent heat from spreading to the center, the bottom surface of the aforementioned groove 2023 is milled to create multiple parallel or mesh-like isolation grooves 204. Since the isolation grooves 204 are filled with air, the poor thermal conductivity of air can effectively hinder heat conduction to the interior region of the groove 2023, causing the heat to be highly concentrated in the third region 2021.

[0034] In this embodiment, see Figure 2 As shown, the specific structure of the temperature control system is as follows: several mounting holes 203 are horizontally opened on the outer side of the hot press plate 202. The heating component 1 includes a heating rod inserted into the mounting hole 203 and an electric heating controller independently mounted on the frame. The heating rod and the electric heating controller are electrically connected through a high-temperature resistant wire.

[0035] Specifically, operators can freely adjust and control the heating temperature through the electric heating controller, setting the optimal pressing temperature according to the characteristics of different batches of adhesive and the thickness of the cardboard, thus accelerating the drying and curing of the adhesive. This temperature control system, in conjunction with the aforementioned customized hot press plate 202, can quickly restore the equipment within 20 minutes of a temporary shutdown for debugging, ensuring no quality abnormalities in the product and completely solving the problems of poor adhesion and delamination caused by traditional cold pressing. Example 2

[0036] Based on Example 1, this example optimizes the internal structure of the combination groove 3 to solve the problem of misalignment and adhesion between the strip box frame 6 and the strip box bottom 7 due to premature contact before pressing.

[0037] See Figure 3As shown, a telescopic groove 301 is circumferentially formed on the inner wall of the combination groove 3. A support frame 302 is horizontally telescopically mounted inside the telescopic groove 301. For example, a miniature cylinder or a return spring is connected to the tail end of the support frame 302. When the support frame 302 extends, it physically divides the internal space of the combination groove 3 into an upper placement space 303 and a lower placement space 304. The upper placement space 303 is used to support the strip box frame 6, and the lower placement space 304 is used to place the strip box bottom 7 coated with glue.

[0038] Furthermore, a thin-film pressure sensor is embedded in the top surface of the support frame 302, which is the force-bearing contact surface with the strip box frame 6 or the pressing component 2.

[0039] Specifically, by setting up the support frame 302, the strip box frame 6 and the strip box bottom 7 are forcibly suspended and isolated before the pressing action occurs, avoiding uncontrolled contact during the falling process. When the pressure sensor detects the preset force threshold during the pressing process, it indicates that the hot press plate 202 has completely and smoothly pressed the strip box frame 6. At this time, the system controls the support frame 302 to retract the telescopic groove 301, and the strip box frame 6 only contacts the strip box bottom 7 in a flattened state under pressure. This dynamic process effectively expels the interlayer air and avoids the generation of misalignment and wavy lines.

[0040] Furthermore, during the pressing process, the side of the hot press plate 202 slides against the inner wall of the carton frame 6. This structure allows the hot press plate 202 to not only apply pressure in the vertical direction but also act as an internal conformal support in the horizontal direction, ensuring that the verticality of the four walls of the formed carton meets the specifications. Example 3

[0041] This application also provides a bottom-pressing and forming method for a fully automatic carton machine. This method is based on the device of embodiment 1 or 2 and specifically includes the following workflow: Step S1, material loading and isolation: Place the strip box bottom 7 coated with glue into the lower placement space 304 of the combination groove 3, and place the strip box frame 6 into the upper placement space 303 above the support frame 302 in the extended state, so as to achieve physical isolation between the two.

[0042] Step S2, Workstation Transfer and Preheating: Control the turntable 4 to rotate stepwise, moving the combination tank 3 containing the material to the pressing station directly below the hot pressing assembly. At the same time, the electric heating controller is activated, controlling the heating rod to heat the hot pressing plate 202 and maintain the temperature to the set temperature required by the product characteristics.

[0043] Step S3, Precise Pressing and Triggering: The lifting assembly 5 drives the pressing assembly 2 to descend at a constant speed, and the hot pressing plate 202 extends into the combination groove 3 and presses against the overlapping edge of the bottom of the strip box frame 6. At this time, the downward pressure is transmitted to the support frame 302 through the strip box frame 6, and the pressure sensor value on the support frame 302 begins to rise.

[0044] Step S4, Dynamic Fitting: When the feedback value of the pressure sensor exceeds the safety threshold set by the system, the control system sends a signal, and the support frame 302 instantly retracts horizontally into the telescopic groove 301. The unsupported strip box frame 6, under the continuous pressure of the hot pressing assembly, smoothly and horizontally contacts the bottom of the strip box 7.

[0045] Step S5, Constant Temperature Pressure Molding: Press component 2 continues to move downwards to the bottom, tightly pressing the strip box frame 6 and the strip box bottom 7 onto the bottom plate of the assembly groove 3. During this process, the hot press plate 202 only heats the peripheral edges, and the mounting plate 201 uses residual heat to press against the top of the strip box frame 6. Maintain this state until the preset pressing time is reached, for example, 1-3 seconds, so that the adhesive is fully heated and cured.

[0046] Step S6, Reset and Cycle: The lifting component 5 drives the pressing component 2 to rise and reset, the support frame 302 extends again, the turntable 4 rotates to send the formed finished product to the next discharge station, and performs the pressing work of the next set of products.

[0047] The above description is merely a specific embodiment of this application, enabling those skilled in the art to understand or implement this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features claimed herein.

Claims

1. A bottom-pressing and forming device for a fully automatic carton machine, characterized in that, It includes: The hot pressing assembly includes a pressing assembly (2) and a heating assembly (1), wherein the heating assembly (1) is used to heat the pressing assembly (2); The assembly includes a turntable (4) and a combination slot (3). The turntable (4) is provided with multiple combination slots (3), which are used to place the strip box frame (6) and the strip box bottom (7). The lifting assembly (5) is used to control the raising and lowering of the pressing assembly (2); The pressing assembly (2) includes a mounting plate (201) and a hot press plate (202). The hot press plate (202) is fixed to the bottom of the mounting plate (201), and the lifting assembly (5) is connected to the mounting plate (201).

2. The bottom bonding and forming device of the fully automatic carton machine as described in claim 1, characterized in that: The hot press plate (202) is mapped on the overlapping area of ​​the carton frame (6) and the carton bottom (7). The bottom of the mounting plate (201) includes a first area and a second area. The hot press plate (202) is installed in the first area, and the second area abuts against the top surface of the carton frame (6).

3. The bottom bonding and forming device of the fully automatic carton machine as described in claim 2, characterized in that: The bottom surface of the hot press plate (202) abuts against the overlapping area, and the side surface of the hot press plate (202) abuts against the inner side surface of the box frame (6).

4. The bottom bonding and forming device of the fully automatic carton machine as described in claim 2, characterized in that: The bottom of the hot press plate (202) includes a third region (2021) and a fourth region (2022). The third region (2021) abuts against the overlapping region, and the fourth region (2022) has a groove (2023).

5. The bottom bonding and forming device of the fully automatic carton machine as described in claim 4, characterized in that: The bottom surface of the groove (2023) has multiple isolation grooves (204), which are used to hinder the heat conduction of the groove (2023).

6. The bottom bonding and forming device of the fully automatic carton machine as described in claim 1, characterized in that: The hot press plate (202) has several mounting holes (203) on its side. The heating component (1) includes a heating rod and an electric heating controller. The heating rod is placed inside the mounting hole (203), and the electric heating controller is electrically connected to the heating rod.

7. The bottom bonding and forming device of the fully automatic carton machine as described in claim 1, characterized in that: The inner wall of the combined groove (3) is provided with a telescopic groove (301), and a support frame (302) is telescopically provided in the telescopic groove (301). The support frame (302) divides the internal space of the combined groove (3) into an upper placement space (303) and a lower placement space (304). The upper placement space (303) is used to place the strip box frame (6), and the lower placement space (304) is used to place the strip box bottom (7). A pressure sensor is provided on the contact surface between the support frame (302) and the pressing component (2).

8. A bottom-pressing and molding method for a fully automatic carton machine, characterized in that: Provides a bottom-pressing and forming apparatus for a fully automatic carton machine as described in any one of claims 1 to 7; Place the strip box frame (6) and the strip box bottom (7) inside the combination slot (3); Move the combination slot (3) to the preset position via the turntable (4); The pressing component (2) is heated by the heating component (1); The pressing component (2) is lowered by the lifting component (5) to press the bar box frame (6) and the bar box bottom (7) until the preset pressing time is reached; Complete the pressing of one set of box frame (6) and box bottom (7), and then proceed with the pressing of the next set of box frame (6) and box bottom (7).

9. The bottom-pressing and molding method of the fully automatic carton machine as described in claim 8, characterized in that, The pressing component (2) is lowered via the lifting component (5) to press the strip box frame (6) and the strip box bottom (7) together until the preset pressing time is reached, specifically including: The pressing component (2) is inserted into the combination groove (3) by the lifting component (5), and the pressing component (2) presses the support frame (302); When the value of the pressure sensor is greater than the threshold, the support frame (302) retracts into the telescopic groove (301), and the bar box frame (6) contacts the bottom of the bar box (7); The pressing component (2) continues to move downward, so that the bar box frame (6) and the bar box bottom (7) are pressed together at the bottom of the combination groove (3) until the preset pressing time is reached.

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