Continuous production process of multi-pit corrugated paper

Abstract

The invention belongs to the technical field of corrugated paper production, and particularly relates to a multi-pit corrugated paper continuous production process which comprises the steps of raw paper preparation, corrugated paper forming, gluing, attaching, drying, cutting and stacking, specifically, proper surface paper, inner paper, core paper and corrugated raw paper are selected according to the application and quality requirements of the multi-pit corrugated paper, and the corrugated raw paper is stacked on the surface paper, the inner paper, the core paper and the corrugated raw paper; core paper is processed into a corrugated shape through a single-face corrugating machine, the single-face corrugating machine comprises an upper corrugating roller, a lower corrugating roller, a pressure roller and a gluing device, the core paper is pressed into the corrugated shape between the heated corrugating rollers, the corrugation peaks are coated with glue, special corrugated paper glue is used, and the corrugated paper is manufactured through the single-face corrugating machine. Glue is evenly coated on the crests of corrugated paper or the surface of paper through a gluing device, and the gluing device is arranged on a single-face corrugating machine and a laminating machine. According to the technology, a full-process continuous production mode is adopted, seamless connection of equipment is achieved through an automatic multi-roll body paper feeding system and an intelligent PLC control system, the production period is shortened, and the productivity is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of corrugated paper production, and in particular relates to a continuous production process of multi-pit corrugated paper. Background Art

[0002] Corrugated paper is a commonly used packaging material, widely used in the packaging and transportation of various commodities. However, traditional processes often struggle to achieve continuous production efficiency. The supply of raw paper and the connection between various production links are not smooth, resulting in frequent shutdowns and restarts, which greatly reduces production efficiency. Traditional processes also lack effective quality control methods. Key quality parameters such as thickness, moisture content, and adhesive strength of corrugated paper cannot be monitored and precisely controlled in real time, resulting in inconsistent product quality and difficulty meeting the needs of the high-end packaging market. Therefore, the development of an efficient, stable, and quality-controlled continuous production process for multi-pit corrugated paper is of great practical significance. Summary of the Invention

[0003] The purpose of the present invention is to provide a continuous production process for multi-pit corrugated paper, which adopts a full-process continuous production mode, realizes seamless connection of equipment through a multi-roll base paper automatic paper feeding system and an intelligent PLC control system, shortens the production cycle and improves production capacity.

[0004] The technical solutions adopted by the present invention are as follows:

[0005] A continuous production process for multi-corrugated paper, characterized in that the process includes: base paper preparation, corrugation forming, gluing, laminating, drying, cutting and stacking; specifically includes the following steps:

[0006] Step 1: Prepare the base paper

[0007] According to the purpose and quality requirements of multi-corrugated paper, choose appropriate face paper, lining paper, core paper and corrugated base paper;

[0008] The base paper is installed on a base paper rack, which can accommodate multiple base paper rolls at the same time, and a tension control system is used to ensure that the base paper maintains appropriate tension during transportation;

[0009] Step 2: Corrugated Forming

[0010] The core paper is processed into a corrugated shape by a single-face corrugating machine, which includes upper and lower corrugating rollers, a pressure roller and a glue coating device. The core paper is pressed into a corrugated shape between the heated corrugating rollers and glue is coated on the flute peaks;

[0011] For multi-corrugated paper, multiple single-faced corrugated papers are combined through a laminating machine;

[0012] Step 3: Glue

[0013] Using special corrugated paper glue, the glue is evenly applied to the flutes of the corrugated paper or the surface of the paper through a gluing device, and the gluing device is set on the single-face corrugating machine and the laminating machine;

[0014] Step 4: Fit

[0015] The glued single-sided corrugated paper is laminated with the face paper or lining paper on a laminating machine, which presses the paper and corrugated paper tightly together through a pressure roller.

[0016] For multi-corrugated paper, multiple laminating operations are performed to laminate different layers of corrugated paper and paper together in sequence.

[0017] Step 5: Drying

[0018] The laminated corrugated cardboard is processed in a segmented temperature-controlled drying tunnel, with the temperature in the front section at 100-110°C and the temperature in the back section at 80-90°C, and then naturally cooled to a moisture content of 8-10%.

[0019] Step 6: Cutting and stacking

[0020] The continuously produced corrugated paper is cut horizontally into appropriate lengths according to the order requirements by a cross-cutting machine controlled by a computer;

[0021] The corrugated paper is cut longitudinally by a slitting machine into the required width. The blade of the slitting machine can be adjusted as needed;

[0022] The cut corrugated paper is stacked by a stacking machine;

[0023] Furthermore, an automated control system is used to centrally control and coordinate the operation of the base paper rack, single-face corrugated machine, laminating machine, drying tunnel and cutting machine.

[0024] Furthermore, the single-sided corrugated machine is equipped with A / B / C pit combination corrugated rollers, the upper roller temperature is 180-200°C, the lower roller temperature is 160-180°C, and the coating is 20-22% solid content corn starch glue (35-45g / m 2 ).

[0025] Furthermore, the specific process of lamination in step 4 is as follows:

[0026] The first layer of lamination: single-faced corrugated cardboard (A flute) and core paper are laminated by glue roller;

[0027] The second layer of lamination: superimpose B-flute or C-flute single-faced cardboard to form an AB or ABC type multi-pit structure.

[0028] Furthermore, the laminating machine accelerates the curing of the glue through a high-frequency preheater (120-140° C.), the laminating pressure is 300-500 kPa, and the laminating residence time is 30-60 s.

[0029] Furthermore, the humidity in the drying tunnel is ≤15%, and the segment temperature is dynamically adjusted by PLC.

[0030] Furthermore, the online detection step is also included:

[0031] The laser sensor monitors the corrugated height in real time and triggers an alarm when the deviation exceeds ±0.1mm;

[0032] The uniformity of the glue line is detected by an infrared imager, and the glue amount is automatically adjusted when the glue coverage is less than 90%.

[0033] The technical effects achieved by the present invention are:

[0034] The process of the present invention realizes continuous and uninterrupted operation from base paper preparation to cutting and stacking. The base paper rack can simultaneously accommodate multiple base paper rolls and continuously supply paper. The various production equipment are closely connected, avoiding frequent shutdown and startup, greatly shortening the production cycle, and increasing the output per unit time. The automated control system is used to centrally control and coordinate the operation of the base paper rack, single-face corrugated machine, laminating machine, drying tunnel, cutting machine and other equipment, reducing the time and errors of manual operation. The production speed and process parameters can be automatically adjusted according to preset parameters to achieve fast and efficient production.

[0035] The present invention configures the single-face corrugated machine with A / B / C pit combined corrugated rollers, accurately controls the temperature of the combined corrugated rollers, and ensures the quality of corrugated forming. The laminating machine accelerates the curing of glue through a high-frequency preheater, ensuring the close fitting of paper and corrugated paper. At the same time, the drying tunnel adopts segmented temperature control and controls the humidity at ≤15%. The segmented temperature is dynamically adjusted by PLC to ensure that the moisture content of the corrugated paper is stable at 8-10%, thereby ensuring the stability and consistency of product quality. Energy can be reasonably allocated according to the drying requirements of the corrugated paper, avoiding excessive energy consumption. At the same time, the natural air cooling method further reduces energy costs. DETAILED DESCRIPTION

[0036] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below in conjunction with the specification.

[0037] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0038] The present invention provides a continuous production process for multi-pit corrugated paper, comprising:

[0039] Step 1: Prepare the base paper

[0040] According to the purpose and quality requirements of multi-corrugated paper, choose appropriate face paper, lining paper, core paper and corrugated base paper;

[0041] The base paper is installed on a base paper rack, which can accommodate multiple base paper rolls at the same time. The tension control system ensures that the base paper maintains appropriate tension during transportation.

[0042] Step 2: Corrugated Forming

[0043] The core paper is processed into a corrugated shape through a single-sided corrugating machine, which includes upper and lower corrugating rollers, a pressure roller and a glue coating device. The core paper is pressed into a corrugated shape between the heated corrugating rollers and glue is coated on the flute peaks.

[0044] For multi-corrugated paper, multiple single-faced corrugated papers are combined through a laminating machine.

[0045] Step 3: Glue

[0046] Use special corrugated paper glue and evenly apply the glue on the flutes of the corrugated paper or the surface of the paper through a gluing device, and the gluing device is set on the single-face corrugating machine and the laminating machine.

[0047] Step 4: Fit

[0048] The glued single-sided corrugated paper is laminated with the face paper or lining paper on a laminating machine, which presses the paper and corrugated paper tightly together through a pressure roller.

[0049] For multi-corrugated paper, multiple laminating operations are performed to laminate different layers of corrugated paper and paper together in sequence.

[0050] The first layer of lamination: the single-sided corrugated cardboard (A flute) and the core paper are laminated by a glue roller.

[0051] The second layer of lamination: superimpose B-flute or C-flute single-faced cardboard to form an AB or ABC type multi-pit structure.

[0052] The laminating machine accelerates the curing of the glue through a high-frequency preheater (120-140°C), the composite pressure is 300-500kPa, and the composite residence time is 30-60s.

[0053] Step 5: Drying

[0054] The laminated corrugated cardboard is processed in a segmented temperature-controlled drying tunnel, with the temperature in the front section at 100-110°C and the temperature in the back section at 80-90°C, and then naturally cooled to a moisture content of 8-10%.

[0055] Step 6: Cutting and stacking

[0056] The continuously produced corrugated paper is cut horizontally into appropriate lengths according to the order requirements by a cross-cutting machine controlled by a computer;

[0057] The corrugated paper is cut longitudinally by a slitting machine into the required width. The blade of the slitting machine can be adjusted as needed;

[0058] The cut corrugated paper is stacked by a stacking machine;

[0059] Adopting an automated control system to centrally control and coordinate the operation of the base paper rack, single-face corrugated machine, laminating machine, drying tunnel, and cutting machine;

[0060] Single-sided corrugated machine is equipped with A / B / C pit combination corrugated rollers, upper roller temperature 180-200℃, lower roller 160-180℃, coated with 20-22% solid content corn starch glue (35-45g / m 2 ).

[0061] The process of the present invention realizes continuous and uninterrupted operation from base paper preparation to cutting and stacking. The base paper rack can accommodate multiple base paper rolls at the same time and continuously supply paper. The various production equipment are closely connected, avoiding frequent shutdown and startup, greatly shortening the production cycle, and increasing the output per unit time. The automatic control system is used to centrally control and coordinate the base paper rack, single-sided corrugated machine, laminating machine, drying tunnel, cutting machine and other equipment, reducing the time and errors of manual operation, and can automatically adjust the production speed and process parameters according to preset parameters to achieve fast and efficient production; the single-sided corrugated machine is configured with A / B / C pit combination corrugating rollers can accurately control the temperature of the combined corrugating rollers to ensure the quality of corrugated forming. The laminating machine accelerates the curing of glue through a high-frequency preheater to ensure a close fit between paper and corrugated paper. At the same time, the drying tunnel adopts segmented temperature control and controls the humidity at ≤15%. The segmented temperature is dynamically adjusted by PLC to ensure that the moisture content of the corrugated paper is stable at 8-10%, ensuring the stability and consistency of product quality. It can reasonably allocate energy according to the drying needs of the corrugated paper, avoiding excessive energy consumption. At the same time, natural air cooling further reduces energy costs.

[0062] The foregoing is merely a preferred embodiment of the present invention. It should be noted that those skilled in the art may make various improvements and modifications without departing from the principles of the present invention, and such improvements and modifications are also within the scope of protection of the present invention. Structures, devices, and operating methods not specifically described or explained herein shall, unless otherwise specified or limited, be implemented in accordance with conventional means in the art.

Claims

1. A continuous production process for multi-pit corrugated paper, characterized in that: The following steps are involved: Base paper preparation, corrugated forming, gluing, laminating, drying, cutting and stacking; Specifically: Step 1: Prepare the base paper According to the purpose and quality requirements of multi-pit corrugated paper, choose appropriate face paper, lining paper, core paper and corrugated base paper; The base paper is installed on a base paper rack, which can accommodate multiple base paper rolls at the same time, and a tension control system is used to ensure that the base paper maintains appropriate tension during transportation; Step 2: Corrugated Forming The core paper is processed into a corrugated shape through a single-sided corrugating machine, which includes upper and lower corrugating rollers, a pressure roller and a glue coating device. The core paper is pressed into a corrugated shape between the heated corrugating rollers and glue is coated on the flute peaks. For multi-corrugated paper, multiple single-faced corrugated papers are combined through a laminating machine; Step 3: Glue Using special corrugated paper glue, the glue is evenly applied to the flutes of the corrugated paper or the surface of the paper through a gluing device, and the gluing device is set on the single-face corrugating machine and the laminating machine; Step 4: Fit The glued single-sided corrugated paper is laminated with the face paper or lining paper on a laminating machine, which presses the paper and corrugated paper tightly together through a pressure roller. For multi-corrugated paper, multiple laminating operations are performed to laminate different layers of corrugated paper and paper together in sequence; Step 5: Drying The laminated corrugated cardboard is processed in a sectioned temperature-controlled drying tunnel, with the front section temperature at 100-110°C and the rear section temperature at 80-90°C, and then naturally cooled to a moisture content of 8-10%; Step 6: Cutting and stacking The continuously produced corrugated paper is cut horizontally into appropriate lengths according to the order requirements by a cross-cutting machine controlled by a computer; The corrugated paper is cut longitudinally by a slitting machine into the required width. The blade of the slitting machine can be adjusted as needed; The cut corrugated paper is stacked by a stacking machine.

2. The continuous production process of multi-pit corrugated paper according to claim 1, characterized in that: An automated control system is used to centrally control and coordinate the operation of base paper racks, single-face corrugated machines, laminating machines, drying tunnels, and cutting machines.

3. The continuous production process of multi-pit corrugated paper according to claim 1, characterized in that: The single-face corrugated machine is equipped with A / B / C pit combination corrugated rollers, with upper roller temperature of 180-200℃ and lower roller temperature of 160-180℃, and is coated with 20-22% solid content corn starch glue (35-45g / m²).

4. The continuous production process of multi-pit corrugated paper according to claim 1, characterized in that: The specific process of lamination in step 4 is: The first layer of lamination: single-faced corrugated cardboard (A flute) and core paper are laminated by glue roller; The second layer of lamination: superimpose B-flute or C-flute single-faced cardboard to form an AB or ABC type multi-pit structure.

5. The continuous production process of multi-pit corrugated paper according to claim 1, characterized in that: The laminating machine accelerates the curing of the glue through a high-frequency preheater (120-140°C), the laminating pressure is 300-500kPa, and the laminating residence time is 30-60s.

6. The continuous production process of multi-pit corrugated paper according to claim 1, characterized in that: The humidity in the drying tunnel is ≤15%, and the segment temperature is dynamically adjusted by PLC.

7. The continuous production process of multi-pit corrugated paper according to claim 1, characterized in that: Also includes online detection steps: The laser sensor monitors the corrugated height in real time and triggers an alarm when the deviation exceeds ±0.1mm; The uniformity of the glue line is detected by an infrared imager, and the glue amount is automatically adjusted when the glue coverage is less than 90%.