Tension self-adaptive adjusting mechanism for printing decorative paper

Abstract

The invention discloses a self-adaptive tension adjusting mechanism for printing decorative paper, which relates to the technical field of printing decorative paper production, and comprises a tensioning roller driven to rotate, a plurality of shaft sleeve bodies, a plurality of tension adjusting mechanisms, a plurality of tension adjusting mechanisms and a plurality of tension adjusting mechanisms, the shaft sleeve body comprises an elastic air bag arranged on the peripheral face of the shaft sleeve body and an air channel formed in the shaft sleeve body and communicated with the interior of the elastic air bag. According to the tension self-adaptive adjusting mechanism for the printing decorative paper, a physical isolation layer is formed through an air film. Normal pressure borne by the paper web, namely pressure for flattening the embossment, is not completely borne by solid materials of the elastic air bag any more, but borne by air pressure in the air film in a distributed mode. Due to the fact that the air can flow, the air can be self-adaptively filled into the concave position of the paper web embossment, the pressure intensity borne by the convex position is obviously reduced due to the existence of the air film, and therefore necessary traction tension is provided, and meanwhile the surface of the embossment is protected.

Description

Technical Field

[0001] This invention relates to the field of printed decorative paper production technology, and more specifically to a tension adaptive adjustment mechanism for printed decorative paper. Background Technology

[0002] In the production process of printed decorative paper, especially in the printing, impregnation, and winding processes, stable tension control is required to prevent deviation and wrinkling. Existing technologies include air-bearing rollers to reduce the contact area, but these are mostly active air-supply types, which are complex in structure, energy-intensive, and have a slow response. Elastic rubber rollers are also used, but their buffering method is passive, unable to actively adapt to different tension requirements and paper surface fluctuations, and they lack cleaning functions.

[0003] A warp knitting machine yarn tension adaptive adjustment mechanism, disclosed in publication number CN223240296U, includes a main body that can be mounted on the warp knitting machine for adjusting yarn tension. A tension adjustment system for adjusting yarn tension is located at the center of the main body. The tension adjustment system includes several tension fine-tuning components for fine-tuning the yarn and adjustment components for driving the tension fine-tuning components to rotate. The tension adjustment system also includes a rotating component mounted on the main body for driving the movement of the tension fine-tuning components and adjustment components. The rotating component includes two rotating plates rotatably mounted on the main body. This invention, through the synergistic action of the tension fine-tuning components, adjustment components, and rotating component, can adaptively adjust the yarn tension.

[0004] However, for high-grade decorative paper with three-dimensional textures such as embossing and floral patterns, the traditional tension rollers, due to their hard surfaces or continuous uniform pressure, are very likely to flatten the raised three-dimensional patterns, thus damaging the product's appearance value. Summary of the Invention

[0005] The purpose of this invention is to provide a tension adaptive adjustment mechanism for printed decorative paper to solve the above-mentioned problems.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a tension adaptive adjustment mechanism for printed decorative paper, comprising a tension roller that is driven to rotate. Multiple bushing bodies are disposed on the tension roller and can extend and retract radially thereon. Each bushing body includes an elastic airbag disposed on its outer peripheral surface and an air passage opened in the bushing body and communicating with the interior of the elastic airbag. The elastic airbag is provided with an elastic element that keeps its outer surface at an initial height. At the initial height, the elastic airbag blocks the outlet of the air passage. When the printed decorative paper compresses the elastic airbag, the outlet of the air passage opens to form an air film between the elastic airbag and the printed decorative paper. Preferably, the device further includes guide components symmetrically arranged at both ends of the tension roller. The guide components include wing plates, each wing plate having a long side and a short side, the short side of which abuts against the end of the bushing unit. The wing plate expands and rotates radially with the bushing unit to form a flow guiding area.

[0007] Preferably, the long side of the wing plate points towards the edge of the printed decorative paper.

[0008] Preferably, the system also includes a drive sleeve axially slidably connected to the tensioning roller, and a linkage mechanism connecting the drive sleeve to each bushing body.

[0009] Preferably, the device also includes a pneumatic telescopic rod for driving the drive sleeve to slide.

[0010] Preferably, the piston rod end of the pneumatic telescopic rod is hinged to the drive sleeve.

[0011] Preferably, the wing is L-shaped.

[0012] Preferably, a spring is also included to keep the wingplate at a predetermined angle.

[0013] Preferably, the outer peripheral surface of the bushing body is provided with a groove for installing the elastic airbag.

[0014] Preferably, the wall thickness of the elastic airbag gradually increases from the top of the protrusion towards the connection with the bushing body.

[0015] In the above technical solution, the tension adaptive adjustment mechanism for printed decorative paper provided by the present invention has the following beneficial effects: The air film in the present invention constitutes a physical isolation layer. The normal pressure on the paper web, i.e., the force for flattening the relief, is no longer entirely borne by the solid material of the elastic air bladder, but is distributed by the air pressure within the air film. Because the gas can flow, it can adaptively fill the recesses of the paper web relief, while the pressure on the protrusions is significantly reduced due to the presence of the air film, thereby achieving protection of the relief surface while providing the necessary traction tension. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this invention. For those skilled in the art, other drawings can be obtained based on these drawings.

[0017] Figure 1 This is an overall three-dimensional schematic diagram provided for an embodiment of the present invention; Figure 2 This is a side sectional view provided for an embodiment of the present invention; Figure 3 Provided for embodiments of the present invention Figure 2 Enlarged schematic diagram of the inner A structure; Figure 4 This is a schematic diagram of the tension roller and bushing body structure provided in an embodiment of the present invention; Figure 5 A cross-sectional view of the tensioning roller provided in an embodiment of the present invention; Figure 6 Provided for embodiments of the present invention Figure 5 Enlarged schematic diagram of the B-structure; Figure 7 This is a schematic diagram of the pneumatic telescopic rod structure provided in an embodiment of the present invention.

[0018] Explanation of reference numerals in the attached figures: 100. Tensioning roller; 110. Roller shaft; 210. Bushing body; 220. Elastic airbag; 230. Air passage; 240. Elastic element; 300. Guide assembly; 310. Mounting base plate; 320. Wing plate; 321. Short side; 322. Long side; 323. Rotating shaft; 324. Spring; 400. Drive sleeve; 410. Connecting rod; 500. Pneumatic telescopic rod; 600. Printed decorative paper. Detailed Implementation

[0019] To enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0020] like Figures 1-7 As shown, a tension adaptive adjustment mechanism for printed decorative paper includes a tension roller 100 that is driven to rotate. Multiple bushing bodies 210 are disposed on the tension roller 100 and can extend and retract radially therein. Each bushing body 210 includes an elastic airbag 220 disposed on its outer peripheral surface and an air passage 230 opened inside the bushing body 210 and communicating with the interior of the elastic airbag 220. The elastic airbag 220 is provided with an elastic element 240 that keeps its outer surface at an initial height. At the initial height, the elastic airbag 220 blocks the outlet of the air passage 230. When the printed decorative paper 600 compresses the elastic airbag 220, the outlet of the air passage 230 opens to form an air film between the elastic airbag 220 and the printed decorative paper 600.

[0021] Specifically, the outer circumferential surface of the bushing body 210 is provided with a groove for installing the elastic airbag 220. The bushing body 210 can expand or contract slightly in the radial direction relative to the central axis of the roller shaft 110. The specific expansion method is detailed below.

[0022] On the outer cylindrical surface of each bushing body 210, multiple elastic air bladders 220 are distributed in a circumferential array. The elastic air bladders 220 are preferably made of highly elastic, fatigue-resistant rubber or silicone material. They are cylindrical or hemispherical in shape, with an outwardly convex arc-shaped outer surface for contact with the paper web, which can be considered a generalized "protrusion". Below each elastic air bladder 220, inside the bushing body 210, an air passage 230 is machined. The air passage 230 opens onto the outer surface of the bushing body 210 and is located precisely at the bottom mounting position of the elastic air bladder 220. During assembly, the inner cavity of the elastic air bladder 220 is directly connected to the outlet of the air passage 230.

[0023] The elastic element 240 is disposed within the internal cavity of the elastic airbag 220. The height of the elastic element 240 in its natural state is greater than the height of the airbag cavity in its initial state. Therefore, the elastic element 240 always applies an outward expanding force to the top and bottom inner walls of the airbag. This force ensures that the elastic airbag 220 maintains a preset initial height even without external load, determining the initial contact gap between the airbag and the paper web. In this state, due to the support of the elastic element 240, the bottom wall of the elastic airbag 220, i.e., the portion in contact with the bushing body 210, is tightly pressed against the outlet edge of the air passage 230, forming an effective seal and thus blocking the outlet of the air passage 230.

[0024] When the equipment starts, the tension roller 100 rotates, and the printed decorative paper 600 wraps around the mechanism at a certain angle. The back of the paper web contacts the outer surface of the elastic air bladder 220 and applies pressure. This compressive force overcomes the supporting force of the elastic element 240, causing the elastic air bladder 220 to be compressed and deformed. Figure 5 As shown, during the deformation process, the bottom wall of the airbag separates from the edge of the airway 230 outlet, breaking the original seal and opening the outlet of the airway 230. Simultaneously, the airbag volume decreases, the internal air pressure increases, and gas quickly overflows from the newly opened gap. This overflowing gas forms an extremely thin, dynamically stable air layer, or "air film," between the protruding outer surface of the elastic airbag 220 and the back of the printed decorative paper 600.

[0025] In the aforementioned technology, the air film constitutes a physical isolation layer. The normal pressure on the paper web, i.e., the force flattening the relief, is no longer entirely borne by the solid material of the elastic air bladder 220, but rather by the distributed air pressure within the air film. Because the gas can flow, it can adaptively fill the recesses of the paper web relief, while the pressure on the protrusions is significantly reduced due to the presence of the air film, thereby achieving protection of the relief surface while providing the necessary traction tension.

[0026] As a further embodiment of the present invention, it also includes guide components 300 symmetrically arranged at both ends of the tension roller 100. The guide components 300 include a wing plate 320, the wing plate 320 including a long side 322 and a short side 321, and the short side 321 of the wing plate 320 abuts against the end of the bushing unit 200. The wing plate 320 expands and rotates radially with the bushing unit 200 to form a flow guiding area.

[0027] Specifically, the long side 322 of the wing plate 320 points towards the edge of the printed decorative paper 600. The guide assemblies 300 are respectively fixed to the frame of the production line by bolts. Each wing plate 320 is rotatably connected to the mounting base plate 310 via a pivot 323. The wing plate 320 is L-shaped and also includes a spring 324 for holding the wing plate 320 at a predetermined angle.

[0028] When all bushing bodies 210 are in a retracted state, their outer diameter is small. At this time, under the action of its own weight, the inner side of the short side 321 of the wing plate 320 is close to the end of the bushing, the wing plate 320 is in a retracted state, and the long side 322 is roughly parallel to the axis of the roller 110.

[0029] When tension needs to be applied to the paper web, the drive system operates, forcing all bushing bodies 210 to expand radially outward synchronously. The ends of the bushing bodies 210 move outward accordingly. Since the short side 321 of the wing plate 320 abuts against it, the bushing ends exert an outward radial thrust on the short side 321, driving the wing plate 320 to rotate outward around the axis 323, i.e., "opening". The greater the expansion of the bushing bodies 210, the greater the opening angle of the wing plate 320.

[0030] After the wing plate 320 opens, its long side 322 extends obliquely into the running path of the printed decorative paper 600. For example... Figure 2 As shown, a wedge-shaped space, or guide zone, is formed between the long side 322 of the open wing plate 320 and the running paper web 600. This zone is wider at the inlet near the paper web and narrower at the outlet, i.e., at the edge of the paper web, further away from the paper web.

[0031] As a further embodiment of the present invention, the wall thickness of the elastic airbag 220 gradually increases from the top of the protrusion toward the connection with the bushing body 210.

[0032] Specifically, this ensures that the narrow outlet end of the guide zone is precisely aligned with the side of the paper web. Gas generated and overflowing from the elastic air bladder 220, once guided into this guide zone, flows along the surface of the long side 322 towards the outlet end. Because the outlet end points towards the side of the paper web, this airflow is ultimately concentrated and guided to the boundary of the paper web 600, and blown along that boundary. This directional blowing effectively eliminates fine dust adsorbed by electrostatics at the paper web edge, small lint generated during processing, and stabilizes slight edge curling that may occur due to uneven tension.

[0033] As a further embodiment of the present invention, it also includes a drive sleeve 400 axially slidably connected to the tension roller 100, and a linkage mechanism 410 connecting the drive sleeve 400 and each bushing body 210.

[0034] Specifically, it also includes a pneumatic telescopic rod 500 that drives the drive sleeve 400 to slide. When the two drive sleeves 400 slide axially toward each other along the roller shaft 110 under external force, they approach each other, and the inclined connecting rod 410 deflects. This deflection motion decomposes into a radially outward component force, which is transmitted to the bushing body 210, pushing all bushing bodies 210 to expand radially outward synchronously. Conversely, when the two drive sleeves 400 slide away from each other, the connecting rod 410 pulls the bushing body 210 to contract radially inward.

[0035] As a further embodiment of the present invention, the wall thickness of the elastic airbag 220 gradually increases from the top of the protrusion toward the connection with the bushing body 210.

[0036] Specifically, from the top center outwards, especially towards the root region where it is bonded or fitted to the bushing body 210, the thickness of the bladder wall increases continuously or in a stepped manner, forming a root-thickened cross-sectional shape.

[0037] When the paper web compresses the air bladder protrusions, the central area at the top of the protrusion bears the greatest normal pressure and requires the greatest elastic deformation to trigger the air passage opening. The thinner wall thickness results in lower stiffness in this area, making it easier to generate larger deformations under the same pressure, thus increasing the sensitivity of air film triggering and ensuring rapid air film formation under relatively low contact pressure. On the other hand, the root of the air bladder (where it connects to the groove) mainly bears shear force and cyclic bending stress, making it a region prone to fatigue failure. The gradually increasing wall thickness, especially the thickened ring at the root, significantly enhances the structural strength and fatigue resistance at this location, preventing root tearing or delamination from the groove due to stress concentration. Simultaneously, the transition design from thin at the top to thick at the bottom makes the deformation of the air bladder more controllable and smooth, avoiding localized wrinkles or abnormal bulges.

[0038] Working principle: The tension roller 100, which is driven to rotate, provides basic traction for the paper web, and its surface has multiple radially retractable bushing bodies 210 forming the main contact surface.

[0039] When tension adjustment is required, an external drive unit, such as a pneumatic telescopic rod 500, pushes the drive sleeve 400 to slide axially. Under external force, the two drive sleeves 400 slide towards each other along the roller shaft 110, causing them to approach each other. This causes the inclined connecting rod 410 to deflect. This deflection motion generates a radially outward component force, which is transmitted to the bushing body 210, pushing all bushing bodies 210 to expand radially outward synchronously. This achieves synchronous radial expansion or contraction of the bushing bodies 210, thereby changing the equivalent diameter of the roller.

[0040] During operation, the printed decorative paper 600 presses the protrusions of the elastic airbag 220 on the outer periphery of the sleeve body 210. The pressure overcomes the resistance of the internal elastic element 240, causing the airbag to deform. This causes the originally blocked air passage 230 outlet to open, and the internal gas overflows and forms a dynamic air film between the protrusions and the paper web, achieving micro-contact and protecting the relief.

[0041] Simultaneously, as the end of the bushing body 210 expands radially, it pushes the short side 321 of the L-shaped wing plates 320 symmetrically arranged at both ends, causing them to rotate and open around the pivot 323. The long side 322 of the wing plate and the paper web form a guiding area. Part of the airflow overflowing from the air film is guided into this area. The gas generated and overflowing from the elastic air bladder 220, once guided into this guiding area, flows along the surface of the long side 322 towards the outlet end. Since the outlet end points to the side of the paper web, this airflow is ultimately concentrated and guided to the boundary of the paper web 600 and blown along the boundary. This directional blowing can effectively eliminate the tiny dust particles adsorbed by electrostatics at the edge of the paper web, the fine lint generated during processing, and stabilize the slight edge curling phenomenon that may be caused by uneven tension.

[0042] The return spring 324 is used to maintain or reset the wing plate 320. Throughout the process, paper web contact automatically triggers the air film protection.

[0043] The foregoing has only described certain exemplary embodiments of the present invention by way of illustration. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the foregoing drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A tension adaptive adjustment mechanism for printed decorative paper, comprising a tension roller (100) driven to rotate, characterized in that, Multiple bushing bodies (210) are disposed on the tension roller (100) and are capable of radial extension and retraction. Each bushing body (210) includes an elastic air bladder (220) disposed on its outer peripheral surface and an air passage (230) opened in the bushing body (210) and communicating with the interior of the elastic air bladder (220). The elastic air bladder (220) is provided with an elastic element (240) that keeps its outer surface at an initial height. At the initial height, the elastic air bladder (220) blocks the outlet of the air passage (230). When the printed decorative paper (600) squeezes the elastic airbag (220), the outlet of the air passage (230) opens to form an air film between the elastic airbag (220) and the printed decorative paper (600).

2. The tension adaptive adjustment mechanism for printed decorative paper according to claim 1, characterized in that, It also includes guide components (300) symmetrically arranged at both ends of the tension roller (100). The guide components (300) include a wing plate (320), the wing plate (320) including a long side (322) and a short side (321), the short side (321) of the wing plate (320) abutting against the end of the bushing unit (200); The wing plate (320) expands and rotates radially with the bushing unit (200) to form a flow guiding area.

3. The tension adaptive adjustment mechanism for printed decorative paper according to claim 2, characterized in that, The long side (322) of the wing plate (320) points towards the edge of the printed decorative paper (600).

4. The tension adaptive adjustment mechanism for printed decorative paper according to claim 1, characterized in that, It also includes a drive sleeve (400) axially slidably connected to the tension roller (100), and a linkage mechanism (410) connecting the drive sleeve (400) to each bushing body (210).

5. The tension adaptive adjustment mechanism for printed decorative paper according to claim 4, characterized in that, It also includes a pneumatic telescopic rod (500) for driving the drive sleeve (400) to slide.

6. The tension adaptive adjustment mechanism for printed decorative paper according to claim 5, characterized in that, The piston rod end of the pneumatic telescopic rod (500) is hinged to the drive sleeve (400).

7. The tension adaptive adjustment mechanism for printed decorative paper according to claim 2, characterized in that, The wing plate (320) is L-shaped.

8. The tension adaptive adjustment mechanism for printed decorative paper according to claim 7, characterized in that, It also includes a spring (324) for keeping the wing (320) at a predetermined angle.

9. The tension adaptive adjustment mechanism for printed decorative paper according to claim 1, characterized in that, The outer circumferential surface of the bushing body (210) is provided with a groove for installing the elastic airbag (220).

10. The tension adaptive adjustment mechanism for printed decorative paper according to claim 1, characterized in that, The wall thickness of the elastic airbag (220) gradually increases from the top of the protrusion toward the connection with the bushing body (210).

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