A corrugated board curing and sizing machine

Abstract

The utility model discloses a kind of corrugated board solidification gluing machines, including coating frame, speed reducer, heating roller, import roller and coating component, the coating component includes roll sleeve, shaft pin, pivot, sliding sheet and eccentric shaft disc. Roll sleeve is equipped with glue pipe and cloth glue micropore, shaft pin is driven pivot periodic rotation by eccentric shaft disc, driving sliding sheet reciprocating sliding in roll sleeve interior, to glue liquid form pulsation extrusion, to realize the uniform distribution and stable output of glue liquid. Heating roller is built-in resistance heating structure, and is equipped with anti-sticking coating on surface, for the hot-pressing solidification of corrugated paperboard after gluing. The structure can realize the dynamic equalizing control of gluing flow and the accurate adjustment of coating thickness, avoid the uneven gluing, glue stacking and solidification lag problem existing in traditional roll brush type gluing, improve gluing uniformity and solidification efficiency, suitable for the continuous production of high-speed corrugated paperboard.

Description

Technical Field

[0001] This utility model relates to the technical field of corrugated cardboard processing equipment, specifically a corrugated cardboard curing and gluing machine. Background Technology

[0002] Currently, the sizing and curing processes in corrugated cardboard production lines generally employ a roller-brush sizing structure, where glue is applied to the cardboard surface via a rotating brush or roller. This type of structure typically consists of a glue reservoir, a gluing roller, and a pressure roller. The glue is applied to the cardboard surface by the glue-laden surface of the gluing roller coming into contact with the cardboard. However, traditional roller-brush sizing machines have the following drawbacks:

[0003] The roller brush structure relies on the natural adsorption of adhesive onto the roller surface. When the adhesive layer thickness on the roller surface is uneven or the roller speed varies, it can easily lead to localized over- or under-application of adhesive, especially in the grooves of the corrugated structure of corrugated cardboard, where the adhesive cannot penetrate sufficiently, resulting in discontinuous application or weak adhesion. Roller brush application is significantly affected by adhesive viscosity, roller speed, and contact pressure, making dynamic adjustment and quantitative control of the adhesive amount difficult. When production rhythm changes or cardboard thickness is inconsistent, manual intervention is often required, leading to poor process repeatability. Existing adhesive application equipment mostly relies on external hot air or heating plates for curing, resulting in low thermal efficiency and significant influence from ambient temperature, leading to slow adhesive curing speed and potential cardboard deformation or cracking of the adhesive layer surface.

[0004] In view of this, we have studied and improved the existing problems to provide a corrugated cardboard curing and gluing machine to solve the current problems. The aim of this technology is to solve the problems and improve its practical value. Utility Model Content

[0005] This utility model aims to solve one of the technical problems existing in the prior art or related technologies.

[0006] Therefore, the technical solution adopted by this utility model is as follows: a corrugated cardboard curing and gluing machine, including a coating rack and a coating assembly. A geared motor is fixedly installed on one side of the coating rack, and heating rollers and guide rollers are rotatably mounted on the surface of the coating rack on both sides, arranged in parallel, to support and guide the stable conveying of the corrugated cardboard during the gluing process. Specifically, the guide rollers are used to maintain the tension of the cardboard and ensure smooth feeding before gluing, and the heating rollers are equipped with a resistance heating device, which uses heat energy to quickly cure the adhesive and form a strong adhesive layer. This structure replaces traditional hot air curing with heat energy conduction, significantly improving the curing speed and thermal efficiency.

[0007] In a preferred example, the coating assembly includes a roller sleeve, a pivot pin, a rotating shaft, and a slide. The roller sleeve is fixedly mounted on the surface of the coating rack and serves as the core cavity for glue storage and distribution. The upper part of the roller sleeve has a glue inlet pipe, and the lower part has several glue distribution micro-holes along its length to evenly discharge the internal glue onto the paperboard surface. This structure allows the glue to form a uniform and continuous glue layer in the coating area, improving upon the uneven coating thickness defects of traditional roller coating.

[0008] In a preferred example, a pin is rotatably mounted at both ends of the roller sleeve, with one end connected to the output of a geared motor via a coupling. One end of the pin passes through the roller sleeve and is fixedly connected to an eccentric shaft disk, the center of which is offset relative to the center of the pin. Rotating shafts are fixedly connected to both ends of the eccentric shaft disk, extending axially along the roller sleeve and driving a sliding vane to reciprocate radially. Through the periodic drive of the eccentric rotation, the vane reciprocates and compresses within the roller sleeve, thereby generating periodic pulsating pressure on the internal adhesive, ensuring a stable and uniform output flow rate from the adhesive distribution micropores. Specifically, this structure can dynamically adjust the adhesive delivery pressure, eliminate adhesive accumulation and uneven coating, and achieve consistent adhesive layer thickness.

[0009] In a preferred example, the rotating shaft is a semi-cylindrical strip structure, symmetrically arranged on both sides of the slider, used to guide the slider to slide smoothly radially. The width of the slider is equal to the inner diameter of the roller sleeve, and its two ends slide against the inner wall of the roller sleeve to ensure a sealed pressure space. Through the radial sliding movement of the slider, a stable flow distribution of adhesive is formed at the outlet of the adhesive distribution micropores, and the adhesive forms a continuous and dense coating layer on the surface of the paperboard, significantly improving the uniformity and control accuracy of adhesive application.

[0010] In a preferred example, the eccentric direction of the eccentric shaft disk is oriented towards the adhesive micropore side. The eccentric drive ensures that the pressure rhythm is consistent with the adhesive discharge direction, ensuring that the adhesive has stronger fluidity and penetration when applied to the corrugated cardboard surface, improving the adhesive coating effect in the recessed areas of the cardboard surface, and enhancing the bonding reliability.

[0011] In a preferred example, the glue inlet tube is connected to an external glue supply system, and its glue inlet rate is matched with the rotational speed of the geared motor, achieving synchronous control of the glue application speed and glue supply. This structure can automatically adjust the glue supply according to the production line speed, avoiding over-coating or under-coating and ensuring a constant glue application rate.

[0012] In a preferred example, the heating roller incorporates a resistance heating element and has an anti-stick coating on its outer surface. When the glued corrugated cardboard is pressed by the heating roller, the glue layer cures rapidly due to the heat, and the anti-stick coating prevents glue from adhering to the roller surface, reducing cleaning frequency. Specifically, the heating roller works in conjunction with the guide roller to achieve a dual function of "hot pressing + guiding," allowing the glue application and curing processes to proceed continuously and reducing downtime.

[0013] The beneficial effects achieved by this utility model are as follows:

[0014] 1. In this invention, a reciprocating extrusion mechanism composed of an eccentric shaft and a sliding plate creates periodic pulsating pressure in the adhesive liquid inside the roller sleeve during the application process, thereby achieving uniform pressure output and stable flow control of the adhesive liquid. Compared with the traditional roller brush type adhesive application structure, this device can effectively avoid uneven coating, adhesive breakage, and adhesive piling, significantly improving coating uniformity and application accuracy.

[0015] 2. In this utility model, the adhesive micropores are arranged in a straight array along the roller sleeve. Combined with the dynamic squeezing action of the sliding plate, the adhesive liquid forms a uniform and continuous adhesive layer on the lower surface of the roller sleeve. This allows for precise control of the coating thickness and the distribution range of the adhesive liquid, ensuring complete adhesive application and firm bonding on the surface of the corrugated cardboard. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of one embodiment of the present utility model;

[0017] Figure 2 This is a schematic diagram of the coating assembly structure according to an embodiment of the present invention;

[0018] Figure 3 This is a schematic diagram of the internal structure of the roller sleeve according to an embodiment of the present invention;

[0019] Figure 4 This is a schematic diagram of the cross-sectional structure of a coating component according to an embodiment of the present invention;

[0020] Figure 5 This is a schematic diagram of the eccentric shaft disk and sliding plate structure according to an embodiment of the present invention.

[0021] Figure label:

[0022] 100. Coating rack; 110. Gear motor; 120. Heating roller; 130. Inlet roller;

[0023] 200. Coating assembly; 210. Roller sleeve; 220. Shaft pin; 230. Rotary shaft; 240. Sliding plate; 211. Glue inlet tube; 212. Glue distribution micro-hole; 221. Eccentric shaft disc. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings. It should be noted that, unless otherwise specified, the embodiments and features of the present utility model can be combined with each other.

[0025] It should be understood that these descriptions are merely exemplary and not intended to limit the scope of this invention.

[0026] The following describes, with reference to the accompanying drawings, some embodiments of the present invention, a corrugated cardboard curing and gluing machine.

[0027] Combination Figures 1-5 As shown, the present invention provides a corrugated cardboard curing and gluing machine, which includes a coating rack 100, a geared motor 110, a heating roller 120, an inlet roller 130, and a coating assembly 200.

[0028] The coating rack 100 supports the entire equipment structure. A geared motor 110 is fixedly installed on one side of the coating rack 100, and its output end is connected to a shaft pin 220 via a coupling. This motor drives the eccentric shaft disc 221 and sliding plate 240 inside the coating assembly 200. A heating roller 120 and an infeed roller 130 are rotatably mounted on the surface of the coating rack 100, arranged in parallel, to support the passage of corrugated cardboard and the subsequent pressing and curing after sizing.

[0029] like Figures 2 to 5 As shown, the coating assembly 200 includes a roller sleeve 210, a shaft pin 220, a rotating shaft 230, and a sliding plate 240. The roller sleeve 210 is fixedly mounted on the surface of the coating frame 100 and serves as the main storage and distribution chamber for the adhesive. The upper part of the roller sleeve 210 has an adhesive inlet pipe 211, and the lower part has a plurality of adhesive distribution micro-holes 212 arranged in a linear array to achieve uniform dispensing of the adhesive.

[0030] In this embodiment, pins 220 are rotatably mounted on both ends of the roller sleeve 210, with one pin 220 connected to the output end of the geared motor 110 via a coupling. One end of the pin 220 passes through the roller sleeve 210 and is fixedly connected to an eccentric shaft disk 221, the center of which is offset relative to the center of the pin 220. Rotating shafts 230 are fixedly connected to both ends of the eccentric shaft disk 221, extending along the axial direction of the roller sleeve 210.

[0031] The rotating shaft 230 is a semi-cylindrical strip structure, symmetrically arranged on both sides of the sliding plate 240, used to guide the sliding plate 240 to slide reciprocally in the radial direction. The two ends of the sliding plate 240 slide against the inner wall of the roller sleeve 210, and its width is equal to the inner diameter of the roller sleeve 210, thus forming a closed pressure cavity during sliding. When the reduction motor 110 drives the shaft pin 220 to rotate, the eccentric shaft disk 221 generates eccentric motion, thereby driving the rotating shaft 230 to rotate synchronously eccentrically, and the sliding plate 240 performs reciprocating sliding motion inside the roller sleeve 210.

[0032] Under the reciprocating motion of the slide plate 240, the adhesive inside the roller sleeve 210 is periodically squeezed and released, thereby forming a stable pulsating pressure at the adhesive application micro-holes 212. This allows the adhesive to be evenly sprayed out through the adhesive application micro-holes 212 and applied to the surface of the corrugated cardboard, achieving uniform and continuous coating. Through the eccentrically driven structure, the adhesive flow is precisely controlled, avoiding uneven coating, adhesive breaks, and bubble residue that occur in traditional roller coating equipment.

[0033] like Figure 1 As shown, the coated corrugated cardboard enters the pressing area between the heating roller 120 and the guide roller 130. The heating roller 120 has a built-in resistance heating structure, which achieves rapid curing of the coated adhesive through high-temperature heating. To prevent adhesive adhesion at high temperatures, the outer surface of the heating roller 120 is provided with an anti-stick coating to ensure the cardboard passes smoothly. The guide roller 130 is used to guide and stabilize the running trajectory of the corrugated cardboard during the coating process.

[0034] In this embodiment, the glue inlet pipe 211 is connected to an external glue supply system, and its glue inlet rate is matched with the output speed of the geared motor 110, so that the glue application speed and glue supply are synchronously coordinated and controlled to ensure the consistency of glue quantity under different production cycles.

[0035] With the combination of the above structures, when the present invention is working, the coating component 200 achieves periodic pressure equalization of the adhesive through the combined action of "eccentric drive + sliding extrusion + adhesive micropore distribution"; and with the support and curing system of "introducing roller 130 + heating roller 120", the continuous gluing and heat curing process of corrugated cardboard is completed.

[0036] In summary, this invention achieves dynamic pressure and uniform distribution of the internal adhesive through an eccentrically driven sliding plate structure, avoiding the problems of uneven coating and flow fluctuation in traditional roller coating structures. At the same time, the built-in heating roller 120 rapidly cures the coating, improving the gluing quality and production efficiency of corrugated cardboard. It has a compact structure, is easy to operate, and is suitable for continuous industrial gluing production lines.

[0037] Working principle and usage process of this utility model:

[0038] In use, the corrugated cardboard curing and gluing machine of this utility model is driven by a reduction motor 110 to rotate the shaft pin 220. The shaft pin 220 drives the rotating shaft 230 to rotate synchronously eccentrically through an eccentric shaft disc 221 fixedly connected to its inner side. Since the axis of the eccentric shaft disc 221 is offset relative to the axis of the shaft pin 220, during its continuous rotation, it drives the sliding plate 240 to reciprocate along the inner wall of the roller sleeve 210, thereby forming periodic pressure fluctuations inside the roller sleeve 210, realizing the squeezing and release of the glue.

[0039] The adhesive is continuously injected into the roller sleeve 210 from the top through the glue inlet pipe 211, and is evenly pushed to the glue distribution micro-holes 212 under the reciprocating motion of the sliding plate 240. The glue distribution micro-holes 212 are arrayed along the length of the roller sleeve 210, allowing the adhesive to overflow evenly under pressure, forming a stable coating layer. The eccentric drive structure and the sliding plate are sealed together to ensure continuous and uniform adhesive output, effectively avoiding the problems of glue breakage, glue accumulation, and uneven glue layer in traditional roller glue application structures.

[0040] After the adhesive is evenly applied to the surface of the corrugated cardboard, the cardboard passes between the guide roller 130 and the heating roller 120. The heating roller 120 has a built-in resistance heating element, which rapidly cures the applied adhesive layer through high-temperature heating. The surface of the heating roller 120 is provided with an anti-stick coating to prevent the adhesive from adhering to its surface at high temperatures, ensuring the continuous and stable passage of the corrugated cardboard.

[0041] During the overall operation, the guide roller 130 and the heating roller 120 are arranged in parallel to guide, support, and press the cardboard, ensuring that the cardboard remains under stable pressure as it passes through the glue application area. At the same time, the speed of the glue inlet pipe 211 and the speed reduction motor 110 are synchronized to achieve automatic coordination and control of the glue application amount and coating speed, ensuring a stable glue supply at different production speeds.

[0042] Through the aforementioned coordinated actions, this utility model utilizes the combined working principle of "eccentric drive + sliding extrusion + adhesive micropore distribution + heating curing" to achieve automated control of the adhesive liquid throughout the entire process of introduction, extrusion, coating and curing. It has significant effects of uniform adhesive application, rapid curing, stable flow rate and anti-clogging, and significantly improves the precision and production efficiency of corrugated cardboard adhesive application process.

[0043] In the description of this specification, the terms "one embodiment," "some embodiments," "specific embodiment," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0044] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A corrugated cardboard curing and gluing machine, characterized in that, include: A coating rack (100) and a coating assembly (200) are provided. A geared motor (110) is provided on one side of the coating rack (100). Heating rollers (120) and guide rollers (130) are rotatably mounted on the surface of the coating rack (100) on both sides. The coating assembly (200) includes a roller sleeve (210), a shaft pin (220), a rotating shaft (230), and a sliding plate (240). The roller sleeve (210) is fixedly mounted on the surface of the coating rack (100), and has a glue inlet pipe (211) and glue application micro-holes on its upper and lower sides, respectively. 212); The pin (220) is rotatably mounted on both ends of the roller sleeve (210), and one of the pins (220) is connected to the output end of the geared motor (110); one end of the pin (220) passes through the inner side of the roller sleeve (210) and is fixedly connected to an eccentric shaft disk (221); the eccentric shaft disk (221) is fixedly mounted on both ends of the rotating shaft (230), and the slide plate (240) is slidably mounted on the inner side of the two rotating shafts (230), and the two ends of the slide plate (240) slide against the inner side of the roller sleeve (210).

2. The corrugated cardboard curing and gluing machine according to claim 1, characterized in that, The rotating shaft (230) is a semi-cylindrical strip structure, symmetrically arranged on both sides of the slider (240), and is used to guide the slider (240) to slide in the radial direction.

3. The corrugated cardboard curing and gluing machine according to claim 1, characterized in that, The axis of the eccentric shaft disk (221) is offset from the axis of the shaft pin (220). The shaft pin (220) is coaxially arranged with the roller sleeve (210). When the eccentric shaft disk (221) and the rotating shaft (230) rotate, the slide (240) reciprocates inside the roller sleeve (210).

4. The corrugated cardboard curing and gluing machine according to claim 1, characterized in that, The inside of the roller sleeve (210) is used for the introduction of adhesive liquid. The adhesive distribution micro-holes (212) are arranged in an array along the straight direction of the roller sleeve (210) to achieve uniform discharge of adhesive liquid. The center of the eccentric shaft disk (221) is offset towards the side of the adhesive distribution micro-holes (212).

5. The corrugated cardboard curing and gluing machine according to claim 1, characterized in that, The width of the slide (240) is equal to the inner diameter of the roller sleeve (210), and the two sides of the slide (240) slide against the inner wall of the roller sleeve (210).

6. The corrugated cardboard curing and gluing machine according to claim 1, characterized in that, The heating roller (120) has a built-in resistance heating structure. Heat energy is applied to the surface of the corrugated cardboard through the heating roller (120) to achieve rapid curing of the adhesive. The outer surface of the heating roller (120) is provided with an anti-stick coating.

7. A corrugated cardboard curing and gluing machine according to claim 1, characterized in that, The infeed roller (130) and the heating roller (120) are arranged in parallel to support and guide the stable transport of the corrugated cardboard during the coating process.

8. A corrugated cardboard curing and gluing machine according to claim 1, characterized in that, The glue inlet pipe (211) is connected to an external glue supply system, and its glue inlet rate is matched with the output speed of the geared motor (110) to achieve automatic coordinated control of glue flow rate and glue application speed.

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