A hard pack cigarette carton wrapper folding system and pressure detection method

Abstract

The application discloses a hard-packed cigarette small-box packaging paper folding system and a pressure detection method. The former comprises a mold, a control unit, a driving unit and a detection unit. The driving unit is located above the mold, and the driving unit is connected with the control unit and the detection unit. The mold is used for receiving the packaging paper. The control unit is connected with the detection unit. The detection unit is used for identifying the model of the packaging paper and sending it to the control unit. The control unit calculates the required pressure of the packaging paper according to the model of the packaging paper. The driving unit comprises a single-acting cylinder, a connecting rod and a pressure plate. The push rod of the single-acting cylinder is connected with the first end of the connecting rod. The second end of the connecting rod is connected with the pressure plate. The pressure plate acts on the packaging paper on the mold. The application automatically identifies the model of the packaging paper through the detection unit, accurately calculates the adaptive indentation pressure of the corresponding packaging paper through the control unit, realizes self-adaptive pressure regulation and control of different specifications of the packaging paper, and guarantees that the indentation line depth, width, shape are uniform and standard.

Description

Technical Field

[0001] This invention relates to the field of cigarette manufacturing technology, and more specifically, to a folding system for hard-pack cigarette box packaging paper and a pressure detection method. Background Technology

[0002] The folding and forming process of hard-pack small boxes involves folding the packaging paper to package the cigarettes into small packs. After folding, the packaging paper is bonded together with water-based adhesive on its inner surface. During production, a mechanical pressure device creates indentation lines on the packaging paper. The depth, width, and shape of these indentation lines determine the pressure required during the folding process and the rebound force of the packaging paper after folding. If the rebound force is too high, it can easily cause the water-based adhesive to come unglued during the forming process, resulting in product quality defects. The relationship between the depth, width, and shape of the indentation lines on the hard-pack small box packaging paper and the folding and forming pressure of the small pack is explained.

[0003] Currently, indentation lines are formed on packaging paper using mechanical pressure devices. Excessive pressure can damage the packaging paper, while insufficient pressure can result in indistinct indentation lines.

[0004] Therefore, how to provide a folding system for hard-pack cigarette box packaging paper and a pressure detection method has become a technical problem that urgently needs to be solved in this field. Summary of the Invention

[0005] The purpose of this invention is to provide a new technical solution for a folding system and pressure detection method for hard-pack cigarette box packaging paper.

[0006] According to a first aspect of the present invention, a folding system for hard-pack cigarette box packaging paper is provided, comprising: a mold, a control unit, a drive unit, and a detection unit;

[0007] The drive unit is located above the mold and is connected to the control unit and the detection unit. The mold is used to receive the packaging paper.

[0008] The control unit is connected to the detection unit. The detection unit is used to identify the type of packaging paper and send it to the control unit. The control unit calculates the required pressure for the packaging paper based on the type of packaging paper.

[0009] The drive unit includes a single-acting cylinder, a connecting rod, and a pressure plate. The push rod of the single-acting cylinder is connected to the first end of the connecting rod, and the second end of the connecting rod is connected to the pressure plate. The pressure plate acts on the packaging paper on the mold.

[0010] Optionally, the single-acting cylinder is connected to an external air source;

[0011] The detection unit includes a pressure gauge and a solenoid valve. The pressure gauge is mounted on the mold and is used to detect the force applied by the pressure plate. The solenoid valve is connected to the single-acting cylinder and an external air source, respectively.

[0012] Optionally, the detection unit further includes a throttle valve, which is disposed between the single-acting cylinder and the solenoid valve, and both ends of the throttle valve are respectively connected to the single-acting cylinder and the solenoid valve.

[0013] Optionally, the hard-pack cigarette box folding system further includes a camera unit, which is electrically connected to the control unit. The camera unit is used to capture the indentation lines on the packaging paper to form an actual image. The control unit compares the actual image with a preset image to determine whether the packaging paper is qualified.

[0014] Optionally, the indentation line information includes the depth, width, and shape information of the indentation line.

[0015] According to a second aspect of the present invention, a method for detecting the folding pressure of a hard-pack cigarette box packaging paper is provided, employing the aforementioned hard-pack cigarette box packaging paper folding system, comprising the following steps:

[0016] Step S1: Identify the type of packaging paper using the detection unit;

[0017] Step S2: Based on the type of packaging paper, the control unit calculates the required pressure for the packaging paper.

[0018] Step S3: Obtain the actual pressure value applied by the pressure plate in real time through the detection unit;

[0019] Step S4: Based on the actual pressure value, determine whether the actual pressure value is equal to the preset pressure value. If so, complete the folding action.

[0020] Step S5: Take a picture of the packaging paper and generate an actual image;

[0021] Step S6: Based on the actual image, extract the indentation line information on the actual image;

[0022] Step S7: Based on the indentation line information, determine whether the indentation line information is the same as the preset indentation line information of the corresponding packaging paper. If so, determine that the packaging paper meets the requirements.

[0023] Optionally, in step S4, if the actual pressure value is less than the preset pressure value, the control unit increases the valve opening of the throttle valve; if the actual pressure value is greater than the preset pressure value, the control unit decreases the valve opening of the throttle valve.

[0024] Optionally, in step S7, if the indentation line information is different from the preset indentation line information of the corresponding packaging paper, the packaging paper is determined to be non-compliant.

[0025] The beneficial effects of this invention are as follows:

[0026] This invention automatically identifies the packaging paper type through a detection unit, and, in conjunction with a control unit, accurately calculates the appropriate indentation pressure for the corresponding packaging paper. This enables adaptive pressure control for packaging paper of different specifications, overcoming the drawbacks of traditional fixed-pressure, one-size-fits-all processing, and ensuring uniform and standardized indentation line depth, width, and shape. Simultaneously, the drive structure, composed of a single-acting cylinder, connecting rod, and pressure plate, provides direct transmission, uniform and stable pressure application, and precise execution of preset pressure, guaranteeing consistent indentation quality.

[0027] This invention utilizes pressure plates to precisely create indentation lines on the packaging paper, effectively stabilizing the folding pressure and rebound force. This significantly reduces quality issues such as adhesive failure and forming defects caused by excessive rebound force, thus lowering the product defect rate. Furthermore, the hard-pack cigarette box folding system of this invention achieves integrated automated operation of detection, calculation, control, and pressure application, eliminating the need for repeated manual parameter adjustments. This greatly improves the equipment's versatility and production adaptability, shortens changeover and debugging time, and effectively enhances the overall efficiency and pass rate of the packaging production line while stabilizing batch quality, reducing raw material waste and production costs.

[0028] Other features and advantages of the invention will become clear from the following detailed description of exemplary embodiments of the invention with reference to the accompanying drawings. Attached Figure Description

[0029] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments of the invention and, together with their description, serve to explain the principles of the invention.

[0030] Figure 1 This is a structural diagram of the hard-pack cigarette box folding system of the present invention;

[0031] Figure 2 This is a flowchart of the method for detecting the folding pressure of the packaging paper of a hard-pack cigarette box according to the present invention.

[0032] The diagram shows the following: 1. Mold; 2. Drive unit; 21. Single-acting cylinder; 22. Connecting rod; 23. Pressure plate; 3. Detection unit; 31. Pressure gauge; 32. Solenoid valve; 33. Throttle valve; 4. External air source. Detailed Implementation

[0033] Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that, unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps set forth in these embodiments do not limit the scope of the invention.

[0034] The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the invention or its application or use.

[0035] Techniques, methods, and equipment known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and equipment should be considered part of the specification.

[0036] In all the examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values.

[0037] like Figure 1 As shown, this embodiment of the invention provides a folding system for hard-pack cigarette box packaging paper, including: a mold 1, a control unit, a drive unit 2, and a detection unit 3;

[0038] The drive unit 2 is located above the mold 1, and the drive unit 2 is connected to the control unit and the detection unit 3. The mold 1 is used to receive the packaging paper.

[0039] The control unit is connected to the detection unit 3. The detection unit 3 is used to identify the type of packaging paper and send it to the control unit. The control unit calculates the required pressure of the packaging paper based on the type of packaging paper.

[0040] The drive unit 2 includes a single-acting cylinder 21, a connecting rod 22, and a pressure plate 23. The push rod of the single-acting cylinder 21 is connected to the first end of the connecting rod 22, and the second end of the connecting rod 22 is connected to the pressure plate 23. The pressure plate 23 acts on the packaging paper on the mold 1.

[0041] Specifically, the packaging paper for the small hard-pack cigarette boxes to be processed is conveyed and placed on mold 1. Detection unit 3 identifies the current packaging paper model and transmits the model information to control unit. After receiving the model data, control unit calculates the target embossing pressure matching the packaging paper. Control unit sends an action command to drive unit 2, activating single-acting cylinder 21. The push rod of single-acting cylinder 21 drives connecting rod 22 and pressure plate 23 to move downwards. Pressure plate 23 applies a preset pressure vertically to the packaging paper on mold 1, pressing indented embossing lines onto the packaging paper. After the embossing process is completed, single-acting cylinder 21 resets, pressure plate 23 lifts, and the packaging paper with the standard embossing lines is sent out to enter the subsequent small pack folding and forming process.

[0042] When changing to different types of packaging paper, the above process is repeated, and the corresponding pressure is automatically matched to complete the creasing preparation. Precise pressure pressing yields stable creasing lines, which can control the folding rebound force of the packaging paper and avoid the problem of water-based adhesive separation after small packages are folded and formed.

[0043] This invention automatically identifies the packaging paper model through the detection unit 3, and, in conjunction with the control unit, accurately calculates the appropriate indentation pressure for the corresponding packaging paper. This enables adaptive pressure control for packaging papers of different specifications, overcoming the drawbacks of traditional fixed-pressure, one-size-fits-all processing, and ensuring uniform and standardized indentation line depth, width, and shape. Simultaneously, the drive structure, composed of a single-acting cylinder 21, a connecting rod 22, and a pressure plate 23, provides direct transmission, uniform and stable pressure application, and precise execution of preset pressure, ensuring consistent indentation quality.

[0044] This invention utilizes the pressure plate 23 to precisely form indentation lines on the packaging paper, effectively stabilizing the folding pressure and rebound force of the packaging paper. This significantly reduces quality problems such as water-based adhesive delamination and forming defects caused by excessive rebound force, thereby reducing the product defect rate. Furthermore, the hard-pack cigarette box packaging paper folding system of this invention achieves integrated automated operation of detection, calculation, control, and pressure application, eliminating the need for repeated manual parameter adjustments. This greatly improves the equipment's versatility and production adaptability, shortens changeover and debugging time, and effectively improves the overall efficiency and pass rate of the packaging production line while stabilizing product batch quality, reducing raw material waste and production costs.

[0045] In one embodiment of the folding system for hard-pack cigarette box packaging paper of the present invention, a single-acting cylinder 21 is connected to an external air source 4.

[0046] The detection unit 3 includes a pressure gauge 31 and a solenoid valve 32. The pressure gauge 31 is installed on the mold 1 and is used to detect the force applied by the pressure plate 23. The solenoid valve 32 is connected to the single-acting cylinder 21 and the external air source 4 respectively.

[0047] Specifically, the solenoid valve 32 can switch on and off the external air source 4, control the intake and depressurization of the single-acting cylinder 21, thereby regulating the cylinder output pressure and realizing the start, stop and adjustment of the pressure; the pressure gauge 31 arranged on the mold 1 can collect the actual force applied to the packaging paper by the pressure plate 23 in real time, forming real-time pressure feedback, which can compare the target pressure with the measured pressure, making it easy for the control unit to dynamically adjust the opening of the solenoid valve 32, correct the cylinder output pressure, and reduce the deviation between theoretical calculation and actual pressure application.

[0048] This invention achieves closed-loop monitoring of indentation pressure, effectively avoiding inaccurate pressure application caused by transmission loss of the single-acting cylinder 21. It ensures that the pressure applied to the packaging paper is stable and meets process requirements, preventing damage to the packaging paper from excessive pressure and unclear indentation lines from insufficient pressure. Stable indentation lines maintain the folding rebound force of the packaging paper within a reasonable range, reducing defects such as glue separation after small package folding.

[0049] The folding system for hard-pack cigarette boxes of the present invention has a simple and reliable structure, responds quickly, facilitates continuous and stable operation of the production line, improves the consistency of creasing processing, and reduces material waste.

[0050] In one embodiment of the folding system for the packaging paper of a hard-pack cigarette box of the present invention, the detection unit 3 further includes a throttle valve 33, which is disposed between the single-acting cylinder 21 and the solenoid valve 32, and the two ends of the throttle valve 33 are respectively connected to the single-acting cylinder 21 and the solenoid valve 32.

[0051] This invention adds a throttle valve 33 between the solenoid valve 32 and the single-acting cylinder 21, which can adjust the flow rate of compressed air entering the single-acting cylinder 21, control the movement speed of the cylinder push rod, and thus regulate the downward and upward movement rate of the pressure plate 23. On the one hand, it can avoid the pressure plate 23 rapidly impacting the packaging paper and generating instantaneous impact pressure, preventing the packaging paper from being damaged by impact, while allowing the pressure plate 23 to apply pressure smoothly, ensuring uniform indentation formation; on the other hand, it can stabilize the cylinder air intake rate, reduce the pressure disturbance caused by air pressure fluctuations, and, together with the pressure detection of the pressure gauge 31, further improve the actual pressure application accuracy.

[0052] The throttle valve 33 and the solenoid valve 32 work together to achieve separate control of airflow interruption and airflow velocity. The pressure is controlled by the solenoid valve 32 to regulate the inlet pressure, while the speed of action is independently adjusted by the throttle valve 33, providing greater control freedom. It also helps to form regular and consistent indentation lines, stabilizes the folding rebound force of the packaging paper, and reduces the problem of glue separation in small package forming.

[0053] In one embodiment of the hard-pack cigarette box folding system of the present invention, the hard-pack cigarette box folding system further includes a camera unit, which is electrically connected to the control unit. The camera unit is used to capture the information of the indentation lines on the packaging paper to form an actual image. The control unit compares the actual image with a preset image to determine whether the packaging paper is qualified.

[0054] This invention verifies the forming results, such as the depth, width, and shape of the crease lines, and can identify crease shape defects caused by factors such as air pressure fluctuations and material differences. Once the size and shape of the crease lines deviate from the standard, the product can be identified as defective in a timely manner, intercepting crease-defective semi-finished products at the source, preventing packaging paper with unqualified creases from entering the folding process, and eliminating subsequent delamination of small packages of water-based adhesive due to abnormal rebound force.

[0055] Furthermore, the testing process is automated, eliminating the need for manual visual inspection, thus improving testing accuracy and efficiency, stabilizing batch product quality, and reducing the defect rate of finished products.

[0056] Furthermore, the information on the indentation line includes the depth, width, and shape of the indentation line.

[0057] According to a second aspect of the invention, such as Figure 2 As shown, a method for detecting the folding pressure of a hard-pack cigarette box is provided, using the aforementioned hard-pack cigarette box folding system, including the following steps:

[0058] Step S1: Identify the type of packaging paper using the detection unit;

[0059] Step S2: Based on the type of packaging paper, the control unit calculates the required pressure for the packaging paper.

[0060] Step S3: Obtain the actual pressure value applied by the pressure plate in real time through the detection unit;

[0061] Step S4: Based on the actual pressure value, determine whether the actual pressure value is equal to the preset pressure value. If so, complete the folding action.

[0062] Step S5: Take a picture of the packaging paper and generate an actual image;

[0063] Step S6: Based on the actual image, extract the indentation line information on the actual image;

[0064] Step S7: Based on the indentation line information, determine whether the indentation line information is the same as the preset indentation line information of the corresponding packaging paper. If so, determine that the packaging paper meets the requirements.

[0065] This invention first identifies the type of packaging paper and matches it with the theoretically required pressure, enabling adaptive setting of process parameters for different packaging papers. It then collects the actual pressure applied by the pressure plate in real time, compares it with the preset pressure, and adjusts the pressure accordingly to avoid damaging the packaging paper due to excessive pressure or causing incomplete creases due to insufficient pressure. After the crease processing is completed with the required pressure, an image is captured by a camera unit to extract key information such as the depth, width, and shape of the crease lines, and compares this information with standard parameters to determine whether the packaging paper is qualified.

[0066] This invention relies on a method of indirectly evaluating quality based on pressure parameters, combining pressure process monitoring with indentation formation result detection. It can promptly correct pressure deviations and identify indentation defects caused by fluctuations in paper material even under normal pressure. This effectively intercepts substandard packaging paper, preventing water-based adhesive delamination in subsequent folding processes due to abnormal indentations or excessive rebound force. It reduces manual intervention, lowers the probability of missed or false detections, stabilizes cigarette box forming quality, improves production pass rates, and facilitates continuous implementation on tobacco packaging production lines.

[0067] In one embodiment of the folding pressure detection method for the packaging paper of a hard-pack cigarette box of the present invention, in step S4, if the actual pressure value is less than the preset pressure value, the control unit increases the valve opening of the throttle valve; if the actual pressure value is greater than the preset pressure value, the control unit decreases the valve opening of the throttle valve.

[0068] Specifically, in the pressure comparison stage, the throttle valve opening is adjusted based on the deviation between the actual pressure and the preset pressure. When the actual pressure is too low, the throttle valve is opened wider; when the actual pressure is too high, the throttle valve is closed narrower. This method can adjust the gas flow rate into the single-acting cylinder, dynamically adjust the cylinder output conditions, and form a real-time closed-loop pressure regulation. It can continuously compensate for pressure deviations caused by gas source fluctuations and cylinder mechanical wear, allowing the actual pressure applied by the pressure plate to stably approach the preset process value.

[0069] In one embodiment of the folding pressure detection method for hard-pack cigarette box packaging paper of the present invention, in step S7, if the indentation line information is different from the preset indentation line information of the corresponding packaging paper, the packaging paper is determined to be non-compliant.

[0070] Specifically, when the collected information on the depth, width, and shape of the indentation does not match the preset standard, the packaging paper is directly judged to be unqualified, thus solving the problem of missed detections where the pressure parameters meet the standard but the indentation is still unqualified due to factors such as individual paper differences and mechanical disturbances.

[0071] Furthermore, timely identification of semi-finished products with distorted, uneven, or inaccurate indentations is crucial to prevent substandard packaging paper from entering subsequent folding processes. This avoids uncontrolled folding rebound force due to abnormal indentation indicators, which could ultimately lead to quality defects such as the separation of small packages of water-based adhesive.

[0072] While specific embodiments of the invention have been described in detail by way of examples, those skilled in the art should understand that the examples are for illustrative purposes only and not intended to limit the scope of the invention. Those skilled in the art should understand that modifications can be made to the above embodiments without departing from the scope and spirit of the invention. The scope of the invention is defined by the appended claims.

Claims

1. A folding system for hard-pack cigarette box packaging paper, characterized in that, include: Mold, control unit, drive unit, and detection unit; The drive unit is located above the mold and is connected to the control unit and the detection unit. The mold is used to receive the packaging paper. The control unit is connected to the detection unit. The detection unit is used to identify the type of packaging paper and send it to the control unit. The control unit calculates the required pressure for the packaging paper based on the type of packaging paper. The drive unit includes a single-acting cylinder, a connecting rod, and a pressure plate. The push rod of the single-acting cylinder is connected to the first end of the connecting rod, and the second end of the connecting rod is connected to the pressure plate. The pressure plate acts on the packaging paper on the mold.

2. The folding system for hard-pack cigarette box packaging paper according to claim 1, characterized in that, The single-acting cylinder is connected to an external air source; The detection unit includes a pressure gauge and a solenoid valve. The pressure gauge is mounted on the mold and is used to detect the force applied by the pressure plate. The solenoid valve is connected to the single-acting cylinder and an external air source, respectively.

3. The folding system for hard-pack cigarette box packaging paper according to claim 2, characterized in that, The detection unit also includes a throttle valve, which is disposed between the single-acting cylinder and the solenoid valve, and the two ends of the throttle valve are respectively connected to the single-acting cylinder and the solenoid valve.

4. The folding system for hard-pack cigarette box packaging paper according to claim 1, characterized in that, The hard-pack cigarette box folding system also includes a camera unit, which is electrically connected to the control unit. The camera unit is used to capture the indentation lines on the packaging paper to form an actual image. The control unit compares the actual image with a preset image to determine whether the packaging paper is qualified.

5. The folding system for hard-pack cigarette box packaging paper according to claim 4, characterized in that, The information about the indentation line includes the depth, width, and shape of the indentation line.

6. A method for detecting the folding pressure of a hard-pack cigarette box packaging paper, characterized in that, The folding system for hard-pack cigarette box packaging paper according to any one of claims 1-5 includes the following steps: Step S1: Identify the type of packaging paper using the detection unit; Step S2: Based on the type of packaging paper, the control unit calculates the required pressure for the packaging paper. Step S3: Obtain the actual pressure value applied by the pressure plate in real time through the detection unit; Step S4: Based on the actual pressure value, determine whether the actual pressure value is equal to the preset pressure value. If so, complete the folding action. Step S5: Take a picture of the packaging paper and generate an actual image; Step S6: Based on the actual image, extract the indentation line information on the actual image; Step S7: Based on the indentation line information, determine whether the indentation line information is the same as the preset indentation line information of the corresponding packaging paper. If so, determine that the packaging paper meets the requirements.

7. The method for detecting the folding pressure of the packaging paper of a hard-pack cigarette box according to claim 6, characterized in that, In step S4, if the actual pressure value is less than the preset pressure value, the control unit increases the valve opening of the throttle valve; if the actual pressure value is greater than the preset pressure value, the control unit decreases the valve opening of the throttle valve.

8. The method for detecting the folding pressure of the packaging paper of a hard-pack cigarette box according to claim 6, characterized in that, In step S7, if the indentation line information is different from the preset indentation line information of the corresponding packaging paper, the packaging paper is determined to be non-compliant.

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