Conductive rollers that can cool down evenly and quickly
By employing a hollow cylindrical structure, a spiral cooling component, and a coolant return channel design in the conductive roller, combined with a conical structure and a locking nut, the problem of poor cooling effect of the conductive roller is solved, achieving uniform and rapid cooling and stable transmission of the conductive roller, reducing deformation and wrinkles, and improving conductivity.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- KOTA TECH CO LTD
- Filing Date
- 2025-08-15
- Publication Date
- 2026-06-30
AI Technical Summary
The existing conductive roller has poor cooling effect, especially insufficient cooling at the end, which reduces the coaxiality of the conductive ring and the conductive roller, affects the conductivity and aggravates deformation. In addition, the difference in the coefficient of thermal expansion between copper and aluminum conductive rings reduces the contact area and causes the temperature to rise rapidly.
The design incorporates a hollow cylindrical roller body, a spiral cooling component, and a coolant return channel. Combined with a conical structure and a stop ring locking nut, it achieves uniform and rapid cooling of the conductive roller. The combined effect of the spiral cooling component and the coolant return channel enhances the cooling effect, while the conical structure and locking nut fix the conductive ring, reducing heat concentration and deformation.
This achieves efficient, uniform, and rapid cooling of the conductive roller, reduces deformation, improves the stability of metal foil transmission, reduces the generation of metal foil wrinkles, and enhances conductivity and stability.
Smart Images
Figure CN224430764U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to a conductive roller, specifically a conductive roller that can uniformly and rapidly cool down and is suitable for use on equipment such as copper foil production machines, surface treatment machines, and continuous electroplating production lines, and belongs to the field of conductive roller technology. Background Technology
[0002] Conductive rollers are key components in equipment such as copper foil forming machines, surface treatment machines, and continuous electroplating production lines. They are used to stably convey metal foil and conduct large currents to the metal foil during the conveying process. Because conductive rollers need to conduct large currents, they generate heat during operation, which can cause thermal damage to the metal foil. Simultaneously, the thermal deformation of the conductive roller itself can lead to wrinkling and deformation of the metal foil during transport. Therefore, existing technologies have incorporated cooling structures inside the conductive roller to reduce its temperature. However, the cooling effect of existing built-in cooling structures is poor, failing to achieve efficient and rapid uniform cooling of the roller surface, especially at the ends. Furthermore, the conductive rings of the conductive rollers are generally made of copper. The difference in thermal expansion coefficients between copper and aluminum conductive rollers causes variations in the contact area between them with temperature changes. This not only reduces the coaxiality of the conductive ring and the conductive roller but also leads to a rapid temperature rise during operation due to the reduced contact area, thus affecting conductivity and exacerbating the deformation of the conductive roller. Summary of the Invention
[0003] In view of the problems existing in the prior art, the present invention provides a conductive roller that can cool down uniformly and quickly, which can achieve efficient, uniform and rapid cooling of the roller surface, thereby reducing the deformation of the conductive roller and improving the stability of the metal foil during the transmission process.
[0004] To achieve the above objectives, the conductive roller capable of uniform and rapid cooling includes a hollow cylindrical roller body and a shaft head I, shaft head II, spiral cooling assembly, coolant inlet conduit, and conductive ring arranged coaxially with the roller body.
[0005] The shaft head I and shaft head II are respectively fixedly installed at both ends of the roller body. The inner end of shaft head I is provided with a blind hole structure arranged in the axial direction, and the inner end of shaft head II is provided with a through hole structure I that penetrates shaft head II in the axial direction.
[0006] The spiral cooling assembly is fixedly installed inside the roller body, including a cylindrical cooling body, end grids and a spiral lead cooling channel grid. Two symmetrically arranged end grids are fixedly installed at both ends of the cylindrical cooling body. A through hole structure II is provided on the central axis of the cylindrical cooling body, penetrating the cylindrical cooling body and the end grids. The spiral lead cooling channel grid is fixedly installed on the cylindrical surface of the cylindrical cooling body, and the spiral lead cooling channel grid is spiral in the axial direction of the cylindrical cooling body. The outer wall of the cylindrical cooling body, the spiral lead cooling channel grid and the inner wall of the roller body cooperate to form a spiral lead cooling channel.
[0007] The coolant inlet conduit passes sequentially through the through hole structure I of the shaft head II and the through hole structure II of the cylindrical cooling body, and extends into the bottom of the blind hole structure of the shaft head I. A coolant return channel is formed between the coolant inlet conduit and the blind hole structure of the shaft head I, and between the coolant inlet conduit and the through hole structure I of the shaft head II.
[0008] The conductive ring is sleeved and positioned on the shaft head II.
[0009] As a further improvement of this utility model, both shaft head I and shaft head II are stepped shaft structures. Shaft head I includes at least a large diameter section and a small diameter section. Shaft head I is fixedly connected to one end of the roller body through its large diameter section. Shaft head II includes at least a large diameter section, a medium diameter section, and a small diameter section. Shaft head II is fixedly connected to the other end of the roller body through its large diameter section. The conductive ring is sleeved and positioned on the medium diameter section of shaft head II.
[0010] As a further improvement of this utility model, the blind hole structure of shaft head I extends outward along the axial direction to the small diameter section of shaft head I.
[0011] As a further improvement of this utility model, the outer surface of the small diameter section of shaft head I and the outer surface of the small diameter section of shaft head II are both coated with an aluminum oxide ceramic layer.
[0012] As a further improvement of this utility model, the mounting surface between the inner surface of the conductive ring and the outer surface of the middle diameter section of the shaft head II is a conical structure that fits together.
[0013] As a further improvement of this utility model, the conductive ring is fitted and positioned on the middle diameter section of the shaft head II by a stop ring and a locking nut mounted on the outer surface of the middle diameter section of the shaft head II.
[0014] As a further improvement of this utility model, the cylindrical cooling body has a hollow structure, and the hollow structure of the cylindrical cooling body is connected to the coolant return channel.
[0015] As a further improvement of this utility model, the outer circular surface of the conductive ring is provided with several shallow grooves.
[0016] As a preferred embodiment of this utility model, the roller body is made of Haas alloy material.
[0017] As a preferred embodiment of this utility model, the conductive ring is made of copper.
[0018] Compared with existing technologies, the conductive roller, which can be cooled uniformly and rapidly, can be designed in a split manner, which facilitates maintenance. Because coolant return channels are provided between the coolant inlet conduit and the blind hole structure of shaft head I, and between the coolant inlet conduit and the through hole structure I of shaft head II, and because the cylindrical cooling body outer wall of the spiral cooling assembly, the spiral lead cooling channel grid, and the inner wall of the roller body work together to form a spiral lead cooling channel, the combined cooling structure can greatly improve the cooling effect of the conductive roller. On the one hand, it can cool the shaft head (especially the bearing retaining coating area), effectively preventing the ceramic coating at the bearing mounting area from cracking due to thermal expansion; on the other hand, it can achieve uniform and comprehensive cooling of the roller body. However, it can achieve efficient, uniform and rapid cooling of the conductive roller surface, thereby reducing the deformation of the conductive roller, improving the stability of the metal foil during transmission, and reducing the generation of wrinkles in the metal foil. Due to the different materials of the conductive ring and the shaft head II, the coefficients and amounts of thermal expansion of the conductive ring and the shaft head II are different during operation. The conductive ring and the shaft head II are fitted with a conical fit, and the fixed end is fixed by a stop ring and a locking nut. Under working conditions, the conductive ring can move slightly along the axial direction, while the stop ring and the locking nut always apply axial fixing stress to the conductive ring. This can achieve better conductive contact between the conductive ring and the shaft head II, which can greatly reduce the probability of heat concentration and deformation caused by poor contact. Attached Figure Description
[0019] Figure 1 This is a schematic diagram of the overall three-dimensional structure of this utility model;
[0020] Figure 2 This is a cross-sectional view of the present invention;
[0021] Figure 3 This is a three-dimensional structural schematic diagram of the spiral cooling component of this utility model.
[0022] In the figure: 1. Roller body, 2. Shaft head I, 3. Shaft head II, 4. Spiral cooling assembly, 41. Cylindrical cooling body, 42. End grid, 43. Spiral lead cooling channel grid, 5. Coolant inlet conduit, 6. Conductive ring. Detailed Implementation
[0023] The present invention will be further described below with reference to the accompanying drawings.
[0024] like Figures 1 to 3 As shown, the conductive roller that can cool down evenly and quickly includes a hollow cylindrical roller body 1, a shaft head I 2, a shaft head II 3, a spiral cooling assembly 4, a coolant inlet conduit 5, and a conductive ring 6, all coaxially arranged with the roller body 1.
[0025] like Figure 2 As shown, both shaft head I2 and shaft head II3 are stepped shaft structures. Shaft head I2 includes at least a large diameter section and a small diameter section. Shaft head I2 is fixedly connected to one end of roller body 1 through its large diameter section. A blind hole structure extending outward along the axial direction to the small diameter section of shaft head I2 is provided at the center of the inner end face of the large diameter section of shaft head I2. The small diameter section of shaft head I2 serves as the bearing mounting position. Shaft head II3 includes at least a large diameter section, a medium diameter section, and a small diameter section. Shaft head II3 is fixedly connected to the other end of roller body 1 through its large diameter section. A through hole structure I extending outward along the axial direction and penetrating shaft head II3 is provided at the center of the inner end face of the large diameter section of shaft head II3. The small diameter section of shaft head II3 also serves as the bearing mounting position.
[0026] The spiral cooling assembly 4 is fixedly installed inside the roller body 1 and located between shaft head I2 and shaft head II3. It includes a cylindrical cooling body 41, end grilles 42, and a spiral lead cooling channel grille 43. Two symmetrically arranged end grilles 42 are fixedly installed at both ends of the cylindrical cooling body 41. A through-hole structure II is provided on the central axis of the cylindrical cooling body 41, penetrating both the cylindrical cooling body 41 and the end grilles 42. Figure 3 As shown, the spiral lead cooling channel grid 43 is fixedly installed on the cylindrical surface of the cylindrical cooling body 41, and the spiral lead cooling channel grid 43 has a spiral structure along the axial direction of the cylindrical cooling body 41. The outer wall of the cylindrical cooling body 41, the spiral lead cooling channel grid 43 and the inner wall of the roller 1 work together to form the spiral lead cooling channel.
[0027] like Figure 2 As shown, the coolant inlet conduit 5 passes through the through hole structure I of the shaft head II3 and the through hole structure II of the cylindrical cooling body 41 in sequence, and extends into the bottom of the blind hole structure of the shaft head I2. A coolant return channel is formed between the coolant inlet conduit 5 and the blind hole structure of the shaft head I2, and between the coolant inlet conduit 5 and the through hole structure I of the shaft head II3.
[0028] The conductive ring 6 is sleeved and positioned on the middle diameter section of the shaft head II3, and the conductive ring 6 is preferably made of copper.
[0029] During operation, the conductive roller, which can uniformly and rapidly cool down, can connect the coolant inlet conduit 5 to the coolant pumping mechanism and connect the return channel between the through hole structure I of the shaft head II3 and the coolant inlet conduit 5 to the coolant return mechanism. The coolant pumped by the coolant pumping mechanism can enter the blind hole structure of the shaft head I2 through the coolant inlet conduit 5 and return through the coolant return channel between the coolant inlet conduit 5 and the blind hole structure of the shaft head I2, thereby cooling the shaft head I2. When the coolant returns to the spiral cooling assembly 4, the coolant can enter the spiral lead cooling channel through the end grid 42. The spiral lead cooling channel covers the entire roller body 1 along the axial direction of the roller body 1, thereby achieving uniform and comprehensive cooling of the roller body 1. When the coolant returns to the coolant return mechanism through the coolant return channel between the through hole structure I of the shaft head II3 and the coolant inlet conduit 5, it can achieve cooling of the shaft head I2 and the conductive ring 6. The combined effect of multiple cooling structures can greatly improve the cooling effect of the conductive roller, achieve efficient, uniform and rapid cooling of the roller surface, thereby reducing the deformation of the conductive roller, improving the stability of the metal foil during the transmission process, and reducing the generation of wrinkles in the metal foil.
[0030] To reduce the likelihood of rapid temperature rise during operation due to poor contact between the conductive ring and the conductive roller, as a further improvement of this invention, the mounting surface between the inner surface of the conductive ring 6 and the outer surface of the middle diameter section of the shaft head II 3 is a fitted conical structure. The conductive ring 6 is fitted and positioned on the middle diameter section of the shaft head II 3 by a stop ring and a locking nut mounted on the outer surface of the middle diameter section. The stop ring and locking nut consistently apply axial fixing stress to the conductive ring 6, achieving better conductive contact between the conductive ring 6 and the shaft head II 3, significantly reducing the likelihood of heat concentration and deformation due to poor contact.
[0031] To achieve better heat dissipation, as a further improvement of this invention, the cylindrical cooling body 41 has a hollow structure, and the hollow structure of the cylindrical cooling body 41 is connected to the coolant return channel. When the coolant returns to the spiral cooling assembly 4, a portion of the coolant can flow through the end grille 42 through the spiral lead cooling channel, while another portion of the coolant can flow through the hollow structure of the cylindrical cooling body 41, thereby achieving better heat dissipation.
[0032] To improve the contact area and surface heat dissipation capacity between the conductive ring 6 and the conductive brush, as a further improvement of this utility model, several shallow grooves are provided on the outer circular surface of the conductive ring 6.
[0033] To prevent the electroplating solution from corroding the roller body 1 and to improve the conductivity of the roller body 1, as a further improvement of this utility model, the roller body 1 is made of Haas alloy material.
[0034] To prevent electrolytic corrosion at the bearing mounting location, as a further improvement of this invention, both the outer surfaces of the small-diameter sections of shaft head I2 and shaft head II3 are coated with an alumina ceramic layer. The coolant return channels between the coolant inlet conduit 5 and the blind hole structure of shaft head I2, and between the coolant inlet conduit 5 and the through hole structure I of shaft head II3, can cool the bearing-mounted coating area, thereby effectively preventing the ceramic coating at the bearing mounting location from cracking due to thermal expansion.
[0035] The conductive roller, which can cool evenly and quickly, can cool shaft heads I2 and II3 (especially the bearing retainer coating area), effectively preventing the ceramic coating at the bearing mounting area from cracking due to thermal expansion. On the other hand, it can achieve uniform and comprehensive cooling of the roller body 1, enabling efficient, uniform and rapid cooling of the conductive roller surface. This reduces the deformation of the conductive roller, improves the stability of the metal foil during transmission, and reduces the formation of wrinkles in the metal foil.
Claims
1. A conductive roller capable of uniform and rapid cooling, characterized in that, It includes a hollow cylindrical roller body (1) and a shaft head I (2), a shaft head II (3), a spiral cooling assembly (4), a coolant inlet conduit (5), and a conductive ring (6) arranged coaxially with the roller body (1); The shaft head I (2) and shaft head II (3) are respectively fixedly installed at both ends of the roller body (1). The inner end shaft center position of shaft head I (2) is provided with a blind hole structure arranged in the axial direction, and the inner end shaft center position of shaft head II (3) is provided with a through hole structure I that penetrates shaft head II (3) in the axial direction. The spiral cooling assembly (4) is located inside the roller body (1) and includes a cylindrical cooling body (41), an end grid (42) and a spiral lead cooling channel grid (43). Two symmetrically arranged end grids (42) are fixedly arranged at both ends of the cylindrical cooling body (41). A through hole structure II is provided on the central axis of the cylindrical cooling body (41) and the end grids (42). The spiral lead cooling channel grid (43) is fixedly arranged on the cylindrical surface of the cylindrical cooling body (41) and the spiral lead cooling channel grid (43) is spiral in the axial direction of the cylindrical cooling body (41). The outer wall of the cylindrical cooling body (41), the spiral lead cooling channel grid (43) and the inner wall of the roller body (1) work together to form a spiral lead cooling channel. The coolant inlet conduit (5) passes through the through hole structure I of the shaft head II (3) and the through hole structure II of the cylindrical cooling body (41) in sequence, and extends into the bottom of the blind hole structure of the shaft head I (2). A coolant return channel is formed between the coolant inlet conduit (5) and the blind hole structure of the shaft head I (2) and between the coolant inlet conduit (5) and the through hole structure I of the shaft head II (3). The conductive ring (6) is sleeved and positioned on the shaft head II (3).
2. The conductive roller capable of uniform and rapid cooling according to claim 1, characterized in that, Both shaft head I (2) and shaft head II (3) are stepped shaft structures. Shaft head I (2) includes at least a large diameter section and a small diameter section. Shaft head I (2) is fixedly connected to one end of roller body (1) through its large diameter section. Shaft head II (3) includes at least a large diameter section, a medium diameter section and a small diameter section. Shaft head II (3) is fixedly connected to the other end of roller body (1) through its large diameter section. The conductive ring (6) is sleeved and positioned on the medium diameter section of shaft head II (3).
3. The conductive roller capable of uniform and rapid cooling according to claim 2, characterized in that, The blind hole structure of shaft head I (2) extends outward along the axial direction to the small diameter section of shaft head I (2).
4. The conductive roller capable of uniform and rapid cooling according to claim 2, characterized in that, The outer surface of the small diameter section of the shaft head I (2) and the outer surface of the small diameter section of the shaft head II (3) are both coated with an aluminum oxide ceramic layer.
5. The conductive roller capable of uniform and rapid cooling according to claim 2, characterized in that, The mounting surface between the inner surface of the conductive ring (6) and the outer surface of the middle diameter section of the shaft head II (3) is a conical structure that fits together.
6. The conductive roller capable of uniform and rapid cooling according to claim 5, characterized in that, The conductive ring (6) is fitted and positioned on the middle diameter section of the shaft head II (3) by a stop ring and a locking nut mounted on the outer surface of the middle diameter section of the shaft head II (3).
7. The conductive roller capable of uniform and rapid cooling according to any one of claims 1 to 6, characterized in that, The cylindrical cooling body (41) has a hollow structure, and the hollow structure of the cylindrical cooling body (41) is connected to the coolant return channel.
8. The conductive roller capable of uniform and rapid cooling according to any one of claims 1 to 6, characterized in that, The outer circular surface of the conductive ring (6) is provided with several shallow grooves.
9. The conductive roller capable of uniform and rapid cooling according to any one of claims 1 to 6, characterized in that, The roller body (1) is made of Haas alloy.
10. The conductive roller capable of uniform and rapid cooling according to any one of claims 1 to 6, characterized in that, The conductive ring (6) is made of copper.