Dynamic regulation and control forming method and system for high-strength corrugated medium paper

Abstract

The invention relates to the technical field of corrugating medium paper forming, in particular to a high-strength corrugating medium paper dynamic regulation and control forming method and system which comprises a transmission device, a dynamic regulation and control device and a sensing device. The dynamic regulation and control device optimizes fiber distribution through adjustable micropore structures of the upper pressing plate and the lower pressing plate, and the sensing device monitors humidity and pressure distribution of wet paper sheets in real time and adjusts the micropore structures in a linkage mode. In the pressing process, fiber interweaving state optimization and thickness uniformity control are achieved, and the problem that in the prior art, forming stability is insufficient is solved. By integrating monitoring and adjusting functions, the production efficiency and the quality stability of finished products are remarkably improved, and the device is suitable for efficient and stable production of high-strength corrugated medium paper.

Description

Technical Field

[0001] The present invention belongs to the technical field of papermaking and paper product processing, and specifically relates to a dynamic control molding method and system for high-strength corrugated core paper. Background Art

[0002] With the continuous development of corrugated core paper manufacturing technology, improving the molding quality, structural strength and production efficiency of high-strength corrugated core paper has become an important research direction in the industry. However, the existing high-strength corrugated core paper production process still has significant deficiencies in the dynamic control of molding, especially in terms of fiber distribution optimization, real-time parameter adjustment and overall stability control. These problems directly affect the uniformity, stability and overall performance of the finished product. For example, the patented technology with publication number CN115787334B avoids the formation of micelles by treating the coarse pulp with sodium lignin sulfonate solution and aeration treatment before coarse pulping, thereby reducing the number and time of pulping, and reducing fiber damage and breakage rate. However, this technical solution mainly focuses on the coarse pulp pretreatment stage, and does not involve the dynamic control of fiber distribution, paper sheet thickness and humidity during the molding process, which makes it difficult to achieve real-time optimization of molding quality in actual production. In addition, this method has limited support for dynamic response capabilities in subsequent processes and is difficult to adapt to the efficient production needs under complex working conditions.

[0003] The above-mentioned shortcomings of the existing technology indicate that the current high-strength corrugated core paper production process still has significant defects in the dynamic control of forming. In particular, the ability to monitor and adjust fiber distribution, paper sheet uniformity, and wet end status during the forming process is relatively weak, making it difficult to meet the demand of modern industry for high-performance corrugated core paper. Therefore, there is an urgent need for a high-strength corrugated core paper forming method and system that can achieve dynamic monitoring and control to optimize fiber distribution and paper sheet uniformity, improve production efficiency and product quality, and thus meet the application requirements of high-performance corrugated core paper in complex working conditions. Summary of the Invention

[0004] The present invention provides a method and system for dynamically controlling the forming of high-strength corrugated core paper, which can significantly improve the problem of insufficient forming stability. The present invention provides a system for dynamically controlling the forming of high-strength corrugated core paper, comprising: a transmission device for conveying wet paper sheets; a dynamic control device, which comprises an upper pressing plate and a lower pressing plate aligned up and down, wherein the upper pressing plate and the lower pressing plate are provided with an adjustable microporous structure; a sensing device for real-time monitoring of wet paper sheet parameters, which comprises a humidity sensor and a pressure distribution sensor, wherein the humidity sensor is embedded in the surface of the lower pressing plate and the pressure distribution sensor is distributed in the edge area of the upper pressing plate; wherein the sensing device is linked to the dynamic control device, and the wet paper sheets are driven by the transmission device to pass through different action areas of the dynamic control device in sequence, and fiber distribution optimization and thickness uniformity adjustment are achieved in the process.

[0005] The present invention also provides a forming method for the aforementioned high-strength corrugated medium paper dynamic control forming system, comprising: performing preliminary pressing and forming on a wet paper sheet; monitoring the moisture and pressure distribution of the wet paper sheet in real time using a sensor device, and dynamically adjusting the microporous structure of the upper and lower pressing plates to optimize the fiber interweaving state; wherein the pressing and dynamic adjustment are performed simultaneously. The dynamic control forming method and system provided by the present invention can significantly improve forming stability and enhance product quality.

[0006] In the dynamic control molding system of the present invention, the sensing device and the dynamic control device work together to obtain key parameters in real time during the wet paper sheet pressing process and dynamically adjust the microporous structure, thereby achieving uniformity of fiber distribution and consistency of thickness. In the prior art, static pressing molding is usually relied upon, which makes it difficult to respond to changes in humidity and pressure of the wet paper sheet in real time, resulting in unstable performance of the finished product. The present invention greatly improves the controllability of the molding process by dynamically adjusting the microporous structure. At the same time, in the prior art, the monitoring and adjustment of humidity and pressure distribution are usually completed in steps, which is inefficient. The present invention integrates monitoring and adjustment into a continuous process, which not only improves production efficiency, but also significantly enhances the stability of the finished product quality. The dynamic control molding system of the present invention can independently adjust the microporous structure according to humidity and pressure distribution data during the wet paper sheet pressing process, thereby achieving fiber distribution optimization and thickness uniformity control through a single pressing process. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] Figure 1 The figure is a flow chart of the dynamic control molding system of the present invention.

[0008] Figure 2 Schematic diagram of the layout of a sensor device according to an embodiment of the present invention.

[0009] Figure 3 This is a flow chart comparing the effects of optimizing fiber distribution and adjusting thickness uniformity of wet paper sheets during dynamic regulation of the present invention. DETAILED DESCRIPTION

[0010] The present invention provides a method and system for dynamically controlling the forming of high-strength corrugated core paper. The core of the method is to optimize the fiber distribution and adjust the thickness uniformity of the wet paper sheet during the pressing process through the coordinated work of the dynamic control device and the sensor device. Figure 1 To the attached Figure 3 Specific embodiments of the present invention are described in detail.

[0011] like Figure 1As shown, the dynamic control forming system of the present invention includes a transmission device, a dynamic control device and a sensing device. The transmission device is used to transport the wet paper sheet, and its structure includes a conveyor belt and a drive motor. The conveyor belt is driven by the drive motor to run at a constant speed to ensure that the wet paper sheet can smoothly enter the action area of the dynamic control device. The dynamic control device is the core component of this system, which includes an upper pressing plate and a lower pressing plate aligned up and down, forming a pressing gap between the two, and the wet paper sheet is pressed in the gap. Adjustable microporous structures are provided in the upper pressing plate and the lower pressing plate. These microporous structures realize dynamic control of the wet paper sheet by independent control of the partitions. The microporous structure is divided into multiple areas, and the pore size and porosity of each area can be adjusted according to real-time monitoring data. Specifically, the adjustment direction of the microporous structure includes lateral expansion or contraction and longitudinal depth change. This design enables differentiated pressure and humidity control to be applied to different areas of the wet paper sheet during the pressing process.

[0012] The sensing device includes a humidity sensor and a pressure distribution sensor, and its layout is as follows Figure 2 As shown in the figure, a humidity sensor embedded in the surface of the lower platen monitors the moisture distribution of the wet paper sheet in real time, while a pressure distribution sensor located at the edge of the upper platen detects the pressure distribution of the wet paper sheet during the pressing process. The sensing device is linked to the dynamic control device, transmitting the collected data to the control system via a signal transmission module. The control system calculates the optimal micropore structure adjustment plan based on this data and issues instructions to the dynamic control device, thus achieving real-time dynamic control of the wet paper sheet.

[0013] The dynamic control molding method of the present invention is specifically implemented as follows: First, the wet paper sheet is transported by a transmission device to the active area of the dynamic control device for initial compression molding. During this process, the humidity sensor and pressure distribution sensor respectively collect the humidity and pressure distribution data of the wet paper sheet. After receiving this data, the control system processes the data using a preset algorithm formula to calculate the optimal adjustment parameters of the microporous structure. Specifically, the humidity distribution data H(x, y) and the pressure distribution data P(x, y) respectively represent the humidity and pressure values of the wet paper sheet at different locations, where x and y are the coordinates within the plane of the wet paper sheet. The control system calculates the adjustment amount ΔD(x, y) of the microporous structure based on the following formula:

[0014] ΔD(x,y)=k1·(H0-H(x,y))+k2·(P0-P(x,y));

[0015] Here, H0 and P0 represent the target humidity and pressure, respectively, and k1 and k2 are weighting coefficients used to balance the effects of humidity and pressure on the microporous structure. Using this formula, the control system can determine the adjustment direction and amplitude for each microporous area, achieving precise control of the wet paper sheet.

[0016] During the pressing process, the dynamic control device independently adjusts the microporous structure in each zone according to the control system's instructions. For example, if the humidity in a certain area is too high, the microporous structure in that area will appropriately expand its pore size to increase air permeability and accelerate water evaporation. If the pressure distribution in a certain area is uneven, the microporous structure in that area will adjust its porosity to change the pressure distribution and make the thickness of the wet paper sheet more uniform. Because the microporous structure is adjusted simultaneously with the pressing process, it can optimize fiber distribution and control thickness uniformity in a single pressing process.

[0017] To verify the effectiveness of the present invention, a comparative experiment was conducted. Wet paper sheets of the same specifications were processed using both a conventional static pressing method and the dynamic control molding method of the present invention. The results showed that the conventional method resulted in a more chaotic fiber distribution and poor thickness uniformity in the wet paper sheets. However, the present method achieved a more uniform fiber distribution and significantly improved thickness consistency. This demonstrates that the present invention, through dynamic control of the microporous structure, can effectively improve the quality of wet paper sheet molding.

[0018] Furthermore, the present invention offers high production efficiency. In traditional methods, humidity and pressure distribution monitoring and adjustment are typically performed in separate steps, resulting in a lengthy molding process. However, the present invention integrates these steps into a continuous process, shortening production cycles and reducing the likelihood of manual intervention, thereby increasing the level of automation.

[0019] In summary, the present invention achieves dynamic control of the wet paper sheet during the pressing process through the coordinated operation of a transmission device, a dynamic control device, and a sensor device, significantly improving forming stability and product quality. The specific embodiments of the present invention have been described in detail above. Its technical solutions are fully disclosed and feasible, providing an efficient, stable method and system for forming high-strength corrugated medium paper in related fields.

[0020] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "includes," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0021] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A high-strength corrugated core paper dynamic control forming system, characterized in that: include: A transmission device for conveying wet paper sheets; A dynamic control device, comprising an upper pressing plate and a lower pressing plate aligned up and down, wherein the upper pressing plate and the lower pressing plate are provided with an adjustable microporous structure; A sensing device for real-time monitoring of wet paper sheet parameters, comprising a humidity sensor and a pressure distribution sensor, wherein the humidity sensor is embedded in the surface of the lower pressing plate, and the pressure distribution sensor is distributed in the edge area of the upper pressing plate; The sensing device is linked to the dynamic control device, and the wet paper sheet is driven by the transmission device to pass through different action areas of the dynamic control device in sequence.

2. The high-strength corrugated medium paper dynamic control forming system according to claim 1, characterized in that: The microporous structure is divided into multiple regions, and the pore size and porosity of each region can be adjusted independently.

3. The high-strength corrugated medium paper dynamic control forming system according to claim 1, characterized in that: The transmission device includes a conveyor belt and a driving motor, and the conveyor belt is driven by the driving motor to run at a constant speed.

4. The high-strength corrugated medium paper dynamic control forming system according to claim 1, characterized in that: The humidity sensor and the pressure distribution sensor are connected to a control system via a signal transmission module, and the control system calculates adjustment parameters of the microporous structure according to the collected data.

5. The high-strength corrugated medium paper dynamic control forming system according to claim 1, characterized in that: The adjustment direction of the microporous structure includes lateral expansion or contraction and longitudinal depth change.

6. The high-strength corrugated medium paper dynamic control forming system according to claim 1, characterized in that: The pressing gap between the upper pressing plate and the lower pressing plate can be dynamically adjusted according to the thickness of the wet paper sheet.

7. A forming method of a high-strength corrugated medium paper dynamic control forming system according to any one of claims 1 to 6, characterized in that: The following steps are involved: Performing preliminary pressing and shaping on the wet paper sheets; The humidity and pressure distribution of the wet paper sheet are monitored in real time through the sensing device, and the microporous structure of the upper and lower pressing plates are dynamically adjusted.

8. The molding method according to claim 7, wherein: The process of dynamically adjusting the microporous structure is based on the following formula to calculate the adjustment amount ΔD(x,y): ΔD(x,y)=k1·(H0-H(x,y))+k2·(P0-P(x,y)); Among them, H0 and P0 are the target humidity and target pressure values, respectively, k1 and k2 are weight coefficients, H(x, y) and P(x, y) are the humidity and pressure values of the wet paper at different positions, respectively.

9. The molding method according to claim 7, wherein: The adjustment of the microporous structure is carried out synchronously with the pressing process to achieve fiber distribution optimization and thickness uniformity control.

10. The molding method according to claim 7, wherein: When the humidity in a certain area is too high, the microporous structure in the corresponding area expands the pore size to increase air permeability; when the pressure distribution in a certain area is uneven, the microporous structure in the corresponding area adjusts the open porosity to change the pressure distribution.

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