A winding and tensioning device for producing and processing technical veneer

Abstract

The application discloses a winding and tensioning equipment for production and processing of scientific veneer, which comprises a traction part, the traction part comprises a machine base, the machine base is rotationally connected with a traction stick through a frame arranged on the top of the machine base, and a winding part, the winding part comprises a rotating stick, the rotating stick is fixedly connected with a rotating shaft through a limiting plate arranged on the outer end of the rotating stick, and the application relates to the technical field of scientific veneer winding. The winding and tensioning equipment for production and processing of scientific veneer can effectively solve the problem that tension adjustment is a very critical step when veneer is wound in the prior art, proper tension can ensure the flatness and curling degree of the veneer, and can avoid wrinkles or loose phenomenon, and general common winding equipment does not have an independent tensioning structure, and can only control the rotating speed of a winding roller motor or a frequency converter to control the winding tension, and thus cannot maintain stable rotating speed, thereby reducing the problems of veneer roll neatness and tightness.

Description

Technical Field

[0001] This invention relates to the field of engineered wood veneer winding technology, specifically to a winding and tensioning device for engineered wood veneer production and processing. Background Technology

[0002] Regarding the processing of wood veneer, the wood is first sliced ​​to obtain thin veneer sheets. Then, it is dyed, printed, and laminated as needed to achieve the desired effect. During the production process, care should be taken to maintain the integrity and uniformity of the veneer to avoid wrinkles, cracks, and other phenomena.

[0003] Rewinding is the core step in the entire process. The prepared veneer is introduced into the winding machine via guide rollers and wound up under tension. Tension adjustment is a crucial step during winding; appropriate tension ensures the flatness and curl of the veneer, preventing wrinkles or loosening. The tension needs to be adjusted appropriately based on the type and thickness of the veneer. Common winding equipment often lacks an independent tensioning structure and relies on adjusting the winding roller motor or frequency converter to control the winding roller speed, thereby controlling the winding tension (during adjustment, it's essential to ensure the winding tension is moderate, neither too high nor too low). This inconsistency in speed maintenance reduces the neatness and tightness of the veneer roll. Summary of the Invention

[0004] To address the aforementioned shortcomings of existing technologies, this invention provides a winding and tensioning device for the production and processing of engineered wood veneer. This device effectively solves the problem that tension adjustment is a crucial step in veneer winding. Appropriate tension ensures the flatness and curl of the veneer, preventing wrinkles or loosening. Common winding equipment lacks an independent tensioning structure and relies on adjusting the winding roller motor or frequency converter to control the winding roller speed, thereby controlling the winding tension. This results in an inability to maintain a stable speed, reducing the neatness and tightness of the veneer rolls.

[0005] To achieve the above objectives, the present invention provides the following technical solution: This invention provides a winding and tensioning device for the production and processing of engineered wood veneer, comprising: The traction unit includes a base, and the base is rotatably connected to a traction rod via a frame disposed on its top; The winding section includes a rotating roller, which is fixedly connected to a rotating shaft by a limiting plate at its outer end. The end of the rotating shaft away from the limiting plate passes through the frame and is rotatably connected to the inside of the frame. A winding drum assembly for winding external veneer is sleeved on the outer circumference of the rotating roller. The top of the frame is equipped with a cylinder, and the output end of the cylinder is fixedly connected to a lifting plate that slides with the outer surface of the frame. The lifting plate is rotatably connected to a pressing roller through a bushing on its lower surface, and the pressing roller is located directly above the traction roller.

[0006] Furthermore, a drive housing connected to the side of the base is provided on the side of the frame away from the traction rod. The outer end of the traction rod is connected to the inside of the drive housing via a connecting shaft. The end of the rotating shaft away from the limiting plate extends into the drive housing and is connected to the inside of the drive housing.

[0007] Furthermore, a semi-circular groove is formed on the outer circumference of the rotating roller, and an adjusting rod is rotatably connected to the rotating roller through a cavity formed inside it. A communicating hole is formed on the inner wall of the semi-circular groove, which communicates with the inside of the cavity. A connecting plate that fits against the inner wall of the cavity is sleeved on the outer circumference of the adjusting rod.

[0008] Furthermore, the adjusting rod has an internal cavity at the end away from the limiting plate, a sliding rod is slidably connected to the inner wall of the internal cavity, a strong spring is provided at the outer end of the sliding rod and connected to the inner wall of the internal cavity, and a friction plate that is tightly fitted to the end face of the rotating roller is fixedly connected to the end of the sliding rod away from the strong spring.

[0009] Furthermore, the take-up drum assembly includes a take-up drum body, which is sleeved on the outer circumferential surface of the rotating roller. A hollow cylinder that fits against the inner wall of the inner wall of the take-up drum body is fixedly connected to the inner wall of the semi-circular groove. A take-up hole that connects to the inside of the hollow cylinder is opened on the outer circumferential surface of the take-up drum body. A limiting groove that fits against the outer surface of the connecting plate is opened on the outer circumferential surface of the hollow cylinder.

[0010] Furthermore, a semi-circular hollow rod is rotatably connected to the inner wall of the hollow cylinder, and a driven gear is fixedly connected to one end of the semi-circular hollow rod via a connecting rod. An active gear ring that meshes with the outer surface of the driven gear is rotatably connected to the end of the winding drum body away from the limiting plate.

[0011] Furthermore, several sets of friction strips are fixedly connected to the side of the semi-circular hollow rod.

[0012] The technical solution provided by this invention has the following advantages compared with the prior art: This invention includes a traction unit. After the initial edge of the veneer is integrated with the winding drum assembly, a servo motor inside the drive housing drives the traction roller to rotate. The pressure roller, subjected to the friction of the veneer, also begins to rotate gradually. Simultaneously, the drive housing synchronously drives the rotating shaft to rotate, which in turn drives the rotating roller via a limit plate, causing the entire winding drum assembly to rotate and begin winding the veneer. Under the premise of a stable and constant rotational speed of the rotating roller and traction roller, to change the winding tension (tension adjustment is a crucial step; appropriate tension ensures the flatness and curl of the veneer, preventing wrinkles or loosening; the tension needs to be adjusted appropriately based on the type and thickness of the veneer), this application only requires adjusting the pressure of the pressure roller on the veneer. Based on the continuous monitoring of the veneer tension by the tension control system, the pressure of the cylinder is adjusted via PLC control, causing the lifting plate to move up and down short distances, which in turn causes the pressure roller to move up and down short distances, changing the friction between the pressure roller and the veneer, thereby appropriately adjusting the veneer winding tension. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are merely some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without any creative effort.

[0014] Figure 1 This is a three-dimensional structural schematic diagram of an embodiment of the present invention; Figure 2 This is a three-dimensional structural schematic diagram of the traction unit according to an embodiment of the present invention; Figure 3 This is a schematic diagram of the three-dimensional partial separation of the winding section according to an embodiment of the present invention; Figure 4 This is a schematic diagram of the three-dimensional separation of the rotating roller, adjusting rod, and sliding rod in an embodiment of the present invention; Figure 5 This is a schematic diagram of the three-dimensional partial separation of the take-up drum assembly according to an embodiment of the present invention; Figure 6 This is a schematic diagram of a partial three-dimensional cross-section of the winding drum body, hollow drum, and semi-circular hollow rod according to an embodiment of the present invention; Figure 7 This is an embodiment of the present invention. Figure 6 A magnified structural diagram of part A in the middle.

[0015] The labels in the diagram represent: 1. Traction unit; 11. Base; 12. Frame; 13. Traction rod; 14. Cylinder; 15. Lifting plate; 16. Bushing; 17. Pressing roller; 2. Rewinding unit; 21. Rotating roller; 211. Semicircular groove; 212. Cavity; 213. Adjusting rod; 214. Connecting hole; 215. Connecting plate; 216. Internal cavity; 217. Slide rod; 218. Strong spring; 219. Friction plate; 22. Limiting plate; 23. Rotating shaft; 24. Rewinding drum assembly; 241. Rewinding drum body; 242. Hollow drum; 243. Rewinding hole; 244. Limiting groove; 245. Semicircular hollow rod; 2451. Friction strip; 246. Passive gear; 247. Active gear ring; 3. Drive housing. Detailed Implementation

[0016] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0017] The present invention will be further described below with reference to embodiments.

[0018] Example: Please refer to Figures 1-7 This invention provides a technical solution: a winding and tensioning device for the production and processing of engineered wood veneer, comprising: The traction unit 1 includes a base 11, and the base 11 is rotatably connected to a traction rod 13 via a frame 12 disposed on its top. The winding section 2 includes a rotating roller 21. The rotating roller 21 is fixedly connected to a rotating shaft 23 by a limiting plate 22 provided at its outer end. The end of the rotating shaft 23 away from the limiting plate 22 passes through the frame 12 and is rotatably connected to the inside of the frame 12. A winding drum assembly 24 for winding external wood veneer is sleeved on the outer circumference of the rotating roller 21. The top of the frame 12 is equipped with a cylinder 14. The output end of the cylinder 14 is fixedly connected to a lifting plate 15 that slides with the outer surface of the frame 12. The lifting plate 15 is rotatably connected to a pressing roller 17 through a bushing 16 on its lower surface, and the pressing roller 17 is located directly above the traction roller 13.

[0019] A drive housing 3 connected to the side of the base 11 is provided on the side of the frame 12 away from the traction rod 13. The outer end of the traction rod 13 is connected to the inside of the drive housing 3 through a connecting shaft. The end of the rotating shaft 23 away from the limit plate 22 extends into the drive housing 3 and is connected to the inside of the drive housing 3.

[0020] A semi-circular groove 211 is provided on the outer circumference of the rotating roller 21. An adjusting rod 213 is rotatably connected to the rotating roller 21 through a cavity 212 provided inside it. A connecting hole 214 is provided on the inner wall of the semi-circular groove 211, which communicates with the inside of the cavity 212. A connecting plate 215 is fitted on the outer circumference of the adjusting rod 213, which fits against the inner wall of the cavity 212.

[0021] An internal cavity 216 is provided at the end of the adjusting rod 213 away from the limiting plate 22. A slide rod 217 is slidably connected to the inner wall of the internal cavity 216. A strong spring 218 connected to the inner wall of the internal cavity 216 is provided at the outer end of the slide rod 217. A friction plate 219 that is in close contact with the end face of the rotating roller 21 is fixedly connected to the end of the slide rod 217 away from the strong spring 218.

[0022] The take-up drum assembly 24 includes a take-up drum body 241, which is sleeved on the outer circumference of the rotating roller 21. A hollow drum 242 that fits against the inner wall of the semi-circular groove 211 is fixedly connected to the inner wall of the take-up drum body 241. A take-up hole 243 that connects to the inside of the hollow drum 242 is opened on the outer circumference of the take-up drum body 241. A limiting groove 244 that fits against the outer surface of the connecting plate 215 is opened on the outer circumference of the hollow drum 242.

[0023] The inner wall of the hollow cylinder 242 is rotatably connected to a semi-circular hollow rod 245. One end of the semi-circular hollow rod 245 is fixedly connected to a driven gear 246 via a connecting rod. The end of the winding drum body 241 away from the limiting plate 22 is rotatably connected to an active gear ring 247 that meshes with the outer surface of the driven gear 246.

[0024] Several sets of friction strips 2451 are fixedly connected to the side of the semi-circular hollow rod 245.

[0025] refer to Figure 1-7 Rewinding is the core step in the entire process. The prepared veneer is introduced into the winding machine via guide rollers and wound up under tension. Tension adjustment is a crucial step during winding; appropriate tension ensures the flatness and curl of the veneer, preventing wrinkles or loosening. The tension needs to be adjusted appropriately based on the type and thickness of the veneer. Common winding equipment often lacks an independent tensioning structure and relies on adjusting the winding roller motor or frequency converter to control the winding roller speed, thereby controlling the winding tension (during adjustment, it's essential to ensure the winding tension is moderate, neither too high nor too low). This inconsistency in maintaining a stable speed reduces the neatness and tightness of the veneer roll. To overcome the aforementioned defects, this invention designs a winding and tensioning device for the production and processing of engineered wood veneer.

[0026] It is important to emphasize that before the veneer is rolled up, the starting edge of the veneer needs to be fixed with positioning blocks or fixing devices. Since the veneer is relatively wide, the positioning or fixing devices generally press the two corners of the starting edge of the veneer. Therefore, during the rolling process, it is difficult to align the core and the starting edge of the veneer, which can easily lead to misalignment of the veneer during rolling. This can cause uneven stress on the veneer during the rolling process, making it impossible to maintain flatness. Moreover, the starting edge pressing area of ​​the veneer is limited, and there is also the possibility of offset or separation. In response to this, this application has designed a rolling section 2, which is used to quickly align the starting edge of the veneer and press the edge as a whole before rolling. Fixing the starting edge of the veneer: First, the take-up drum body 241 on the take-up drum assembly 24 has several sets of take-up holes 243 (multiple sets of take-up holes 243 provide convenience, as the nearest set can be selected; second, multiple sets of take-up holes 243 have a low individual usage rate, which improves service life; third, it increases the resistance of a single semi-circular hollow rod 245), and a hollow cylinder 242 that communicates with the inside of the take-up holes 243 is fixed on the inner wall of the take-up drum body 241. Since the starting edges of the veneer have been neatly trimmed, the operator only needs to neatly insert the starting edges of the veneer into the take-up holes 243. The starting edges of the veneer are then inserted into the hollow cylinder 242 until the starting straight edge of the veneer neatly adheres to the bottom of the inner wall of the semi-circular hollow rod 245. At this point, the starting edges of the veneer are automatically aligned. Then, the operator only needs to rotate the drive gear ring 247 to lock it. The drive gear ring 247 drives the driven gear 246 to rotate, causing the semi-circular hollow rod 245 to rotate with damping around the inside of the hollow cylinder 242 (multiple sets are performed simultaneously; any set of take-up holes 243 can be inserted). The rotation process of the semi-circular hollow rod 245... In the middle, the semi-circular opening of the semi-circular hollow rod 245 "begins to gradually close", and at the same time, the side friction strip 2451 of the semi-circular hollow rod 245 begins to "laterally press the starting edge of the veneer" until the starting edge of the veneer is locked at the closed interface of the semi-circular hollow rod 245 and the hollow cylinder 242. At the same time, the friction strip 2451 tightly presses the starting edge of the veneer to prevent the starting edge of the veneer from loosening or detaching. At this time, the starting edge of the veneer and the winding drum assembly 24 are combined into a whole (it is only necessary for the starting edge of the veneer to be locked when the initial winding is started. After the veneer is wound a few times, the semi-circular hollow rod 245 will basically no longer be under force due to friction).

[0027] Veneer tension adjustment: After the veneer starting edge and the take-up drum assembly 24 are combined into a whole, the servo motor inside the drive housing 3 starts to drive the traction roller 13 to rotate. The pressure roller 17 is subjected to the friction of the veneer, and the pressure roller 17 also begins to rotate gradually. At the same time, the drive housing 3 synchronously drives the rotating shaft 23 to rotate, which drives the rotating roller 21 to rotate through the limit plate 22, and drives the take-up drum assembly 24 to rotate as a whole, and begins to wind up the veneer. Under the premise that the rotation speed of the rotating roller 21 and the traction roller 13 remains constant, in order to change the winding tension (tension adjustment is a very critical step. Appropriate tension can ensure the flatness and curl of the veneer and avoid wrinkles or looseness. The tension needs to be adjusted appropriately according to the type and thickness of the veneer), this application only needs to adjust the pressure of the lower pressure roller 17 on the veneer. According to the continuous monitoring of the veneer tension status by the tension control system, the pressure of the cylinder 14 is adjusted by the PLC control, which drives the lifting plate 15 to move up and down a short distance, which in turn drives the lower pressure roller 17 to move up and down a short distance, thereby changing the friction between the lower pressure roller 17 and the veneer, and thus appropriately adjusting the veneer winding tension.

[0028] The take-up section 2 adopts a detachable structure: In existing veneer winding systems, the veneer is directly wound onto the winding roller, making unwinding difficult. Furthermore, the unwound veneer often has loose inner layers, hindering storage and transportation. To address this, the winding section 2 in this application employs a detachable structure. The rotating roller 21 and the winding drum assembly 24 are detachable. The rotating roller 21 itself is immovable, while the winding drum assembly 24 is used for winding and transferring veneer. During installation, the hollow cylinder 242 on the winding drum assembly 24 is aligned with the semi-circular groove 211. Then, the winding drum body 241 is pushed, causing the hollow cylinder 242 to slide along the inner wall of the semi-circular groove 211 until the end face of the winding drum body 241 adheres to the outer surface of the limiting plate 22. At this point, the rotating roller 21 and the winding drum assembly 24 maintain a consistent state in the circumferential rotation direction. To prevent lateral axial movement of the take-up drum assembly 24, this application also includes a connecting plate 215. Manually pulling the friction plate 219 outwards (the friction surface of the friction plate 219 disengages from the end face of the rotating roller 21) causes the sliding rod 217 to slide outwards along the interior cavity 216 (the powerful spring 218 undergoes further elastic deformation). Then, rotating the friction plate 219 causes the sliding rod 217 and adjusting rod 213 to rotate synchronously, causing the connecting plate 215 to rotate along the inner wall of the cavity 212 until the "arc edge" of the connecting plate 215 slides into the connecting hole 214. At this point, the "arc edge" of the connecting plate 215 is precisely engaged in the limiting groove 244. Releasing the friction plate 219 resets the assembly. In the lateral axial direction, the rotating roller 21 and the take-up drum assembly 24 are combined into a single unit, ensuring the smooth rotation of the take-up drum assembly 24. Similarly, during disassembly, simply pull the friction plate 219 again and rotate it in the opposite direction to disengage the "arc edge" of the connecting plate 215 from the limiting groove 244. The overall operation is simple.

[0029] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions will not cause the essence of the corresponding technical solutions to deviate from the protection scope of the technical solutions of the embodiments of the present invention.

Claims

1. A winding and tensioning device for the production and processing of engineered wood veneer, characterized in that, include: The traction unit (1) includes a base (11) and a traction rod (13) is rotatably connected to the base (11) by a frame (12) disposed on its top. The winding section (2) includes a rotating roller (21). The rotating roller (21) is fixedly connected to a rotating shaft (23) by a limiting plate (22) at its outer end. The end of the rotating shaft (23) away from the limiting plate (22) passes through the frame (12) and is rotatably connected to the inside of the frame (12). The outer circumference of the rotating roller (21) is fitted with a winding drum assembly (24) that can be used for winding external wood veneer. The top of the frame (12) is provided with a cylinder (14), and the output end of the cylinder (14) is fixedly connected to a lifting plate (15) that slides against the outer surface of the frame (12). The lifting plate (15) is rotatably connected to a pressing roller (17) through a bushing (16) on its lower surface, and the pressing roller (17) is located directly above the traction roller (13).

2. The winding and tensioning equipment for the production and processing of engineered wood veneer according to claim 1, characterized in that: The frame (12) is provided with a drive housing (3) connected to the side of the base (11) on the side away from the traction rod (13). The outer end of the traction rod (13) is connected to the inside of the drive housing (3) through a connecting shaft. The end of the rotating shaft (23) away from the limiting plate (22) extends into the drive housing (3) and is connected to the inside of the drive housing (3) through transmission.

3. The winding and tensioning equipment for the production and processing of engineered wood veneer according to claim 1, characterized in that: The rotating roller (21) has a semi-circular groove (211) on its outer circumference. The rotating roller (21) is rotatably connected to an adjusting rod (213) through a cavity (212) inside it. The inner wall of the semi-circular groove (211) has a connecting hole (214) that communicates with the inside of the cavity (212). The outer circumference of the adjusting rod (213) is fitted with a connecting plate (215) that fits against the inner wall of the cavity (212).

4. The winding and tensioning equipment for the production and processing of engineered wood veneer according to claim 3, characterized in that: The adjusting rod (213) has an internal cavity (216) at the end away from the limiting plate (22). A slide rod (217) is slidably connected to the inner wall of the internal cavity (216). A strong spring (218) connected to the inner wall of the internal cavity (216) is provided at the outer end of the slide rod (217). A friction plate (219) that is tightly fitted to the end face of the rotating roller (21) is fixedly connected to the end of the slide rod (217) away from the strong spring (218).

5. The winding and tensioning equipment for the production and processing of engineered wood veneer according to claim 3, characterized in that: The take-up drum assembly (24) includes a take-up drum body (241), which is sleeved on the outer circumference of the rotating roller (21). The inner wall of the take-up drum body (241) is fixedly connected to a hollow cylinder (242) that fits against the inner wall of the semi-circular groove (211). The outer circumference of the take-up drum body (241) is provided with a take-up hole (243) that connects to the inside of the hollow cylinder (242). The outer circumference of the hollow cylinder (242) is provided with a limiting groove (244) that fits against the outer surface of the connecting plate (215).

6. The winding and tensioning equipment for the production and processing of engineered wood veneer according to claim 5, characterized in that: The hollow cylinder (242) is rotatably connected to a semi-circular hollow rod (245) on its inner wall. One end of the semi-circular hollow rod (245) is fixedly connected to a driven gear (246) via a connecting rod. The end of the winding drum body (241) away from the limiting plate (22) is rotatably connected to an active gear ring (247) that meshes with the outer surface of the driven gear (246).

7. The winding and tensioning equipment for the production and processing of engineered wood veneer according to claim 6, characterized in that: Several sets of friction strips (2451) are fixedly connected to the side of the semi-circular hollow rod (245).

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