Apparatus for making and method of making burst-resistant corrugated paperboard

Abstract

The application provides a device for manufacturing anti-burst corrugated paperboard and a method for producing the anti-burst corrugated paperboard, which comprises multiple line dispensing devices, a glue dipping device, a compaction roller, and a steam device arranged in sequence; a first surface paper conveying assembly is arranged above the compaction roller and is used for conveying first surface paper; the first surface paper passes through the compaction roller; a second surface paper conveying assembly is arranged below the compaction roller and is used for conveying second surface paper; the second surface paper passes through the compaction roller; the cotton thread dispensed by the multiple line dispensing devices passes through the glue dipping device and the compaction roller in sequence, and the cotton thread is located between the first surface paper and the second surface paper; the steam device is arranged around the compaction roller and is used for spraying steam to the first surface paper or the second surface paper. The cotton thread is first subjected to glue dipping treatment, and then the glued cotton thread is compacted and bonded with the surface paper, so that large-area coating of the glue layer on the surface of the surface paper is avoided, the amount of glue is saved, and the production cost is reduced.

Description

Technical Field

[0001] This invention relates to the field of explosion-proof corrugated cardboard production technology, specifically to equipment for making explosion-proof corrugated cardboard and methods for producing explosion-proof corrugated cardboard. Background Technology

[0002] Corrugated cardboard is a common type of packaging paperboard. It is a multi-layered laminate, consisting of at least one layer of corrugated core paper and one layer of cardboard. A corrugated cardboard production line is composed of two relatively independent process sections: wet-end equipment and dry-end equipment, designed according to the corrugated cardboard production process requirements. The wet-end equipment processes the corrugated base paper into three-, five-, and seven-layer corrugated cardboard with different flute configurations. The dry-end equipment performs longitudinal cutting, creasing, cross-cutting, and stacking of the corrugated cardboard according to order requirements. The wet-end equipment mainly includes base paper trays, automatic splicers, preheaters, single-facers, paper conveying bridges, glue coaters, and double-facers. The dry-end equipment mainly includes rotary cutters, longitudinal cutting and creasing machines, cross-cutting machines, and stackers.

[0003] One related technology involves shatterproof corrugated cardboard. This shatterproof corrugated cardboard consists of a layer of cotton thread bonded to the inside of ordinary corrugated cardboard. This design significantly increases the strength and toughness of the corrugated cardboard, preventing cartons made from it from bursting due to overloading. In the shatterproof corrugated cardboard production line, the degree of adhesion between the cotton thread and the cardboard also determines the quality of the corrugated cardboard. Currently, the common method is to coat the cardboard with an adhesive layer and then place the cotton thread on the corrugated cardboard, allowing the cotton thread to adhere to the cardboard.

[0004] The above content has flaws. The amount of adhesive used affects the factory's production costs. The above bonding method greatly increases the amount of adhesive used, thereby increasing the production costs for small and medium-sized enterprises. Summary of the Invention

[0005] This invention proposes a manufacturing method for explosion-proof corrugated cardboard, which solves the above-mentioned technical problems.

[0006] The technical solution of this invention is implemented as follows:

[0007] On one hand, an equipment for manufacturing explosion-proof corrugated cardboard is provided, including a multi-thread feeding device, a glue-impregnating device, a compaction roller, and a steam device arranged in sequence; a first face paper conveying assembly is provided above the compaction roller for conveying a first face paper, which passes through the compaction roller; a second face paper conveying assembly is provided below the compaction roller for conveying a second face paper, which passes through the compaction roller; cotton threads released by the multi-thread feeding device pass sequentially through the glue-impregnating device and the compaction roller, and the cotton threads are located between the first face paper and the second face paper; the steam device is arranged around the compaction roller and is used to spray steam onto the first face paper or the second face paper.

[0008] In some embodiments, the multi-threading device includes a base, a bracket, and an anti-winding ring; the upper surface of the base is connected to at least one cotton thread winding core; one end of the bracket is connected to the base, and the other end of the bracket is connected to at least one anti-winding ring, the anti-winding ring being located directly above the cotton thread winding core; one end of a single cotton thread is wound around the surface of a single cotton thread winding core, and the other end of the single cotton thread passes through the anti-winding ring located directly above the cotton thread winding core.

[0009] In some embodiments, the adhesive impregnation device includes an outer casing, an automatic lifting device, an inner casing, and an adhesive impregnation roller; the automatic lifting device and the inner casing are both located inside the outer casing, the automatic lifting device is connected to the outer casing, and the inner casing is located above the automatic lifting device, the inner casing being used to contain adhesive; the adhesive impregnation roller is located in the inner casing, and the height of the adhesive impregnation roller remains constant; a scraping device is provided at one end of the outer casing near the compaction roller shaft, and at least one guide ring is provided at the other end of the outer casing away from the compaction roller shaft; cotton thread passes sequentially through the guide ring, the adhesive impregnation roller, and the scraping device.

[0010] In some embodiments, the glue-scraping device includes a connecting rod, a clamping ring, and a glue-scraping ring connected to the outer casing; the connecting rod is straight and has at least one clamping ring on its body; the glue-scraping ring includes a central tube, a glue-blocking sleeve, and a heating wire, the glue-blocking sleeve being fitted over the central tube, and the central tube having the heating wire; the glue-blocking sleeve is trumpet-shaped, with its outwardly expanding end away from the compaction roller shaft; the central tube is rotatably connected to the clamping ring; the inner diameter of the central tube is adapted to the diameter of the cotton thread, and a single cotton thread after glue impregnation passes through a single central tube.

[0011] In some embodiments, a thermally expanded rubber block is provided at the junction of the central tube and the rubber-blocking sleeve, and the thermally expanded rubber block is disposed away from the compaction roller shaft.

[0012] In some embodiments, an electric heater is provided between the outer casing and the inner casing, and a temperature sensor is provided inside the inner casing.

[0013] On the other hand, a method for producing explosion-proof corrugated cardboard is provided, including the aforementioned equipment for producing explosion-proof corrugated cardboard, the method comprising the following steps:

[0014] S1. The first paper conveying component conveys the first paper, and the second paper conveying component conveys the second paper.

[0015] S2. The multi-thread feeding device feeds out at least one cotton thread, the free end of which passes through the impregnation device, which impregnates the cotton thread with adhesive.

[0016] S3. The first paper conveyed by the first paper conveying component, the glued cotton thread, and the second paper conveyed by the second paper conveying component are all compacted and bonded together by the compaction roller.

[0017] The beneficial effects of the technical solution provided in this application include: (i) The present invention first impregnates the cotton thread with glue, and then presses and bonds the glue-impregnated cotton thread to the face paper, which can avoid the glue layer being coated on the surface of the face paper over a large area, saving the amount of glue used and thus reducing production costs; (ii) The present invention can ensure that the entire length of the cotton thread is impregnated with glue, making the bond between the cotton thread and the face paper stronger, avoiding the previous situation where a few cotton threads could not be bonded because they were not placed on the glue layer of the face paper; (iii) The present invention uses a steam device, which can wet the first face paper and the second face paper. By wetting rather than applying glue, the first face paper and the second face paper are bonded, saving a lot of glue and reducing production costs. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the structure of the present invention;

[0020] Figure 2 This is a schematic diagram of the structure of the multi-line feeding device of the present invention;

[0021] Figure 3 This is a schematic diagram of the impregnation device of the present invention;

[0022] Figure 4 This is a schematic diagram of the adhesive scraping device of the present invention.

[0023] In the diagram: 1. Multi-thread feeding device; 110. Base; 120. Bracket; 130. Anti-winding ring; 140. Cotton thread winding core; 2. Glue dipping device; 210. Outer casing; 220. Automatic lifting device; 221. Lead screw; 222. Sliding block; 223. Motor; 230. Inner casing; 240. Glue dipping roller; 250. Guide ring; 260. Glue scraping device; 261. Connecting rod; 262. Clamping ring; 263. Glue scraping ring; 2631. Central tube; 2632. Glue blocking sleeve; 2633. Heating wire; 2634. Thermal expansion rubber block; 3. Compacting roller shaft; 310. First compacting roller shaft; 320. Second compacting roller shaft; 4. First face paper conveying assembly; 5. First face paper; 6. Second face paper conveying assembly; 7. Second face paper; 8. Cotton thread; 9. Steam device. Detailed Implementation

[0024] The technical solution of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0025] like Figure 1 As shown, this embodiment provides an equipment for manufacturing explosion-proof corrugated cardboard, including a multi-thread feeding device 1, a glue-impregnating device 2, a compaction roller 3, and a steam device 9 arranged in sequence. The multi-thread feeding device 1, the glue-impregnating device 2, and the compaction roller 3 are all placed on the upper surface of a mounting base. The multi-thread feeding device 1 is used to feed out multiple cotton threads 8. The glue-impregnating device 2 impregnates the cotton threads 8 fed out by the multi-thread feeding device 1 with glue, facilitating the subsequent bonding of the cotton threads 8 to the face paper. The compaction roller 3 is used to compact and bond the face paper and the cotton threads 8 between the face papers. The steam device 9 is used to slightly impregnate either the first face paper 5 or the second face paper 7, facilitating the subsequent bonding of the first face paper 5 and the second face paper 7. A first face paper conveying assembly 4 is provided above the compaction roller 3, which conveys the first face paper 5, which passes through the compaction roller 3. A second face paper conveying assembly 6 is provided below the compaction roller 3. The second face paper conveying assembly 6 is used to convey a second face paper 7, which passes through the compaction roller 3. The cotton thread 8 released by the multi-threading device 1 passes sequentially through the impregnation device 2 and the compaction roller 3, and the cotton thread 8 is located between the first face paper 5 and the second face paper 7. The steam device 9 is arranged around the compaction roller 3, and the steam device 9 is used to spray steam onto the first face paper 5 or the second face paper 7.

[0026] This invention first impregnates the cotton thread 8 with adhesive, then presses and bonds the adhesive-impregnated cotton thread 8 to the face paper. This avoids a large area of ​​adhesive coating on the face paper surface, saving adhesive and thus reducing production costs. Furthermore, this invention ensures that the entire length of the cotton thread 8 is impregnated with adhesive, resulting in a stronger bond between the cotton thread 8 and the face paper, preventing the previous situation where a few cotton threads 8 were not placed on the adhesive layer of the face paper, leading to bonding failure. Simultaneously, this invention uses a steam device 9 to wet the first face paper 5 and the second face paper 7. By wetting rather than applying adhesive, the first face paper 5 and the second face paper 7 are bonded, saving a significant amount of adhesive and reducing production costs.

[0027] like Figure 2 As shown, in some embodiments, the multi-thread feeding device 1 includes a base 110, a support 120, and an anti-winding ring 130. At least one cotton thread winding core 140 is connected to the upper surface of the base 110, and the cotton thread winding core 140 is arranged in a pagoda shape. Cotton thread 8 can be wound around the surface of the cotton thread winding core 140. One end of the support 120 is welded and fixedly connected to the base 110, and the other end of the support 120 is connected to at least one anti-winding ring 130, which is located directly above the cotton thread winding core 140. The anti-winding ring 130 mainly serves a guiding function to prevent multiple cotton threads 8 from tangling together during operation. One end of a single cotton thread 8 is wound around the surface of a single cotton thread winding core 140, and the other end of the single cotton thread 8 passes through the anti-winding ring 130 located directly above the cotton thread winding core 140. When the equipment for making explosion-proof corrugated cardboard starts operating, the cotton thread 88 will be continuously released. The cotton thread winding core 140 can be fixed to the upper surface of the base 110, and the cotton thread winding core 140 can also be rotatably mounted on the upper surface of the base 110. Preferably, in this embodiment, the cotton thread winding core 140 is fixed to the upper surface of the base 110, and a loose cotton thread segment is provided between the cotton thread winding core 140 and the anti-winding ring 130. This method can avoid errors when the cotton thread winding core 140 rotates, thus avoiding frequent repairs. In addition, the loose cotton thread segment can play a certain degree of buffering role.

[0028] The thread unwinding process when the cotton thread winding core 140 is fixed to the upper surface of the base 110 is as follows: the cotton thread 8 passes through the anti-winding ring 130, which is located directly above the cotton thread winding core 140. As the cotton thread 8 is continuously used and pulled out of the anti-winding ring 130 at high speed, the loose cotton thread 8 segments will be tensioned into an arc shape under the action of force and make a circular motion around the cotton thread winding core 140 to avoid winding on the cotton thread winding core 140.

[0029] like Figure 3As shown, in some embodiments, the impregnation device 2 includes an outer casing 210, an automatic lifting device 220, an inner casing 230, and an impregnation roller 240. The automatic lifting device 220 and the inner casing 230 are both located inside the outer casing 210. The automatic lifting device 220 is connected to the outer casing 210, and the inner casing 230 is connected to the automatic lifting device 220. The automatic lifting device 220 allows the inner casing 230 to move up and down for height adjustment. In some embodiments, the automatic lifting device 220 includes at least one lead screw 221, at least one sliding block 222, and at least one motor 223. The motor 223 is connected to the interior of the outer casing 210, the output section of the motor 223 is connected to one end of the lead screw 221, the sliding block 222 is screwed to the lead screw 221, and the inner casing 230 is connected to the sliding block 222. The rotation of motor 223 drives the lead screw 221 to rotate. A sliding block 222 is screwed to the lead screw 221. When the lead screw 221 rotates, the sliding block 222 moves up and down along the lead screw 221, thereby allowing the inner box 230 to rise and fall. The inner box 230 is used to hold adhesive. The dip roller 240 is located within the inner box 230, and its height remains constant. The dip roller 240 is immersed in the adhesive. During use, the amount of adhesive in the inner box 230 gradually decreases, causing the adhesive level to drop. When the height of the dip roller 240 remains constant, the automatic lifting device 220 can move the inner box 230 up and down, ensuring that the dip roller 240 is immersed in the adhesive. This fully utilizes the adhesive in the inner box 230, even at the lowest liquid level. Furthermore, the height of the dip roller 240 remains constant. This also ensures that the angle of the cotton thread does not change during transmission, making it more stable.

[0030] The outer casing 210 is equipped with a scraping device 260 at one end near the compaction roller shaft 3, and at least one guide ring 250 at the other end away from the compaction roller shaft 3. Cotton threads 8 pass sequentially through the guide ring 250, the glue-impregnating roller 240, and the scraping device 260. The guide ring 250 guides the threads and prevents multiple cotton threads 8 from tangling. The scraping device 260 scrapes the glue from the impregnated cotton threads 8. Since some parts of the impregnated cotton threads 8 may have a large amount of glue, the scraping device 260 can determine that the amount of glue on the cotton threads 8 is at an appropriate level. In some embodiments, an electric heater is provided between the outer casing 210 and the inner casing 230, and a temperature sensor is provided inside the inner casing 230. The electric heater heats the inner casing 230, and the temperature sensor measures the temperature of the glue solution inside the inner casing 230.

[0031] like Figure 4As shown, in some embodiments, the adhesive scraping device 260 includes a connecting rod 261, a clamping ring 262, and an adhesive scraping ring 263 connected to the outer casing 210. The connecting rod 261 is straight, and its body is provided with at least one clamping ring 262. Preferably, the clamping rings 262 are equidistant from each other, which facilitates the equidistant arrangement of the cotton threads 8 sandwiched between the first face paper 5 and the second face paper 7. The more cotton threads 8 there are, the better the pressure-bearing capacity. When there are few cotton threads 8 in a certain area, the pressure-bearing capacity of the explosion-proof corrugated paper is very weak. Evenly distributing the cotton threads 8 can make the pressure-bearing capacity of the explosion-proof corrugated paper balanced.

[0032] The scraping ring 263 includes a central tube 2631, a glue-blocking sleeve 2632, and a heating wire 2633. The glue-blocking sleeve 2632 is fitted over the central tube 2631, which is used for the passage of the glue-impregnated cotton thread 8 and for scraping off excess glue around the cotton thread 8. The glue-blocking sleeve 2632 is funnel-shaped, with its outer end away from the compaction roller shaft 3. The glue-blocking sleeve 2632 can collect the scraped glue and prevent glue from accumulating at the other end of the central tube 2631, so that the glue-impregnated cotton thread 8 will still have some glue adhering to it when it leaves the central tube 2631, thus weakening the scraping effect. The central tube 2631 is rotatably connected to the clamping ring 262. The inner diameter of the central tube 2631 is adapted to the diameter of the cotton thread 8, and a single glue-impregnated cotton thread 8 passes through a single central tube 2631. The heating wire 2633 is provided in the central tube 2631. The heating wire 2633 can heat the adhesive to prevent it from solidifying and clogging the central tube 2631. A thermally expanding rubber block 2634 is provided at the junction of the central tube 2631 and the adhesive-blocking sleeve 2632, and the thermally expanding rubber block 2634 is positioned away from the compaction roller shaft 3. The adhesive-blocking sleeve 2632 is made of rubber. As the temperature of the central tube 2631 rises, the thermally expanding rubber slowly expands, increasing the angle between the central tube 2631 and the adhesive-blocking sleeve 2632, thus causing the adhesive-blocking sleeve 2632 to continue to expand outward, increasing the area capable of blocking the adhesive. This also corresponds to the fact that the longer the time, the more adhesive accumulates inside the adhesive-blocking sleeve 2632.

[0033] In some embodiments, an inclined reflux plate is provided below the scraper ring 263, with one end of the reflux plate connected to the inner box and the other end located below the scraper ring 263.

[0034] This embodiment also provides a method for producing explosion-proof corrugated cardboard, including the above-mentioned equipment for producing explosion-proof corrugated cardboard. The method for producing explosion-proof corrugated cardboard includes the following steps:

[0035] S1. The first sheet paper conveying component 4 conveys the first sheet paper 5, and the second sheet paper conveying component 6 conveys the second sheet paper 7.

[0036] S2. The multi-thread feeding device 1 feeds out at least one cotton thread 8, and the free end of the cotton thread 8 passes through the impregnation device 2, which impregnates the cotton thread 8 with glue.

[0037] S3, the first paper 5 conveyed by the first paper conveying component 4, the glue-impregnated cotton thread 8, and the second paper 7 conveyed by the second paper conveying component 6 are all compacted and bonded together by the compaction roller 3.

[0038] In the description of this application, it should be noted that the terms "upper," "lower," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Unless otherwise expressly specified and limited, the terms "installed," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication between two elements. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0039] It should be noted that in this application, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0040] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. Equipment for manufacturing explosion-proof corrugated cardboard, characterized in that, The device includes a multi-thread feeding device (1), an impregnation device (2), a compaction roller (3), and a steam device (9) arranged in sequence. A first paper conveying assembly (4) is provided above the compaction roller (3) for conveying a first paper (5), which passes through the compaction roller (3). A second paper conveying assembly (6) is provided below the compaction roller (3) for conveying a second paper (7), which passes through the compaction roller (3). The cotton thread (8) released by the multi-thread feeding device (1) passes through the impregnation device (2) and the compaction roller (3) in sequence, and the cotton thread (8) is located between the first paper (5) and the second paper (7). The steam device (9) is arranged around the compaction roller (3) and is used to spray steam onto the first paper (5) or the second paper (7). The impregnation device (2) includes an outer casing (210), and a scraping device (260) is provided at one end of the outer casing (210) near the compaction roller shaft (3); The adhesive scraping device (260) includes a connecting rod (261), a clamping ring (262), and an adhesive scraping ring (263) connected to the outer casing (210); the connecting rod (261) is straight and has at least one clamping ring (262) on its body; the adhesive scraping ring (263) includes a central tube (2631), an adhesive-blocking sleeve (2632), and a heating wire (2633), and the adhesive-blocking sleeve (2632) is sleeved on the central tube. A central tube (2631) is provided with the heating wire (2633); the adhesive-resistant sleeve (2632) is flared and its outer end is far away from the compaction roller shaft (3); the central tube (2631) is rotatably connected to the clamping ring (262); the inner diameter of the central tube (2631) is adapted to the diameter of the cotton thread (8), and a single cotton thread (8) after being impregnated with adhesive passes through a single central tube (2631); A thermally expanded rubber block (2634) is provided at the junction of the central tube (2631) and the rubber-blocking sleeve (2632), and the thermally expanded rubber block (2634) is disposed away from the compaction roller shaft (3).

2. The equipment for manufacturing explosion-proof corrugated cardboard according to claim 1, characterized in that, The multi-thread feeding device (1) includes a base (110), a bracket (120), and an anti-winding ring (130); the upper surface of the base (110) is connected to at least one cotton thread winding core (140); one end of the bracket (120) is connected to the base (110), and the other end of the bracket (120) is connected to at least one anti-winding ring (130), the anti-winding ring (130) is located directly above the cotton thread winding core (140); one end of a single cotton thread (8) is wound around the surface of a single cotton thread winding core (140), and the other end of the single cotton thread (8) passes through the anti-winding ring (130) located directly above the cotton thread winding core (140).

3. The equipment for manufacturing explosion-proof corrugated cardboard according to claim 1, characterized in that, The glue-dipping device (2) further includes an automatic lifting device (220), an inner box (230), and a glue-dipping roller (240); the automatic lifting device (220) and the inner box (230) are both located inside the outer box (210), the automatic lifting device (220) is connected to the outer box (210), and the inner box (230) is located above the automatic lifting device (220). The inner box (230) is used to hold adhesive; the glue-dipping roller (240) is located in the inner box (230), and the height of the glue-dipping roller (240) remains unchanged; a glue-scraping device (260) is provided at one end of the outer box (210) near the compaction roller shaft (3), and at least one guide ring (250) is provided at the other end of the outer box (210) away from the compaction roller shaft (3); the cotton thread (8) passes through the guide ring (250), the glue-dipping roller (240), and the glue-scraping device (260) in sequence.

4. The equipment for manufacturing explosion-proof corrugated cardboard according to claim 3, characterized in that, An electric heater is provided between the outer casing (210) and the inner casing (230), and a temperature sensor is provided inside the inner casing (230).

5. A method for producing explosion-proof corrugated cardboard, characterized in that, The equipment for manufacturing explosion-proof corrugated cardboard as described in claim 1, and the method for producing explosion-proof corrugated cardboard, include the following steps: S1, the first paper conveying component (4) conveys the first paper (5), and the second paper conveying component (6) conveys the second paper (7); S2. The multi-thread feeding device (1) feeds out at least one cotton thread (8), and the free end of the cotton thread (8) passes through the impregnation device (2), which impregnates the cotton thread (8). S3. The first paper (5) conveyed by the first paper conveying component (4), the glued cotton thread (8), and the second paper (7) conveyed by the second paper conveying component (6) are compacted and bonded together by the compaction roller (3).

Images