Printing roller cooling device for green printing

Abstract

The utility model discloses a printing roller cooling device for green printing, which comprises a roller body, a spiral cooling water channel arranged in the roller body, and a rotary water inlet and a water outlet which are communicated with an external water pump, the spiral cooling water channel comprises a left-hand spiral water channel and a right-hand spiral water channel, and a microneedle array is arranged in the spiral cooling water channel. Shaft necks are arranged at the two ends of the roller body, and round holes communicated with the rotary water inlet and the rotary water outlet are formed in the two shaft necks. According to the printing roller, the bidirectional spiral water channel is arranged in the roller body, cooling liquid is headed in the middle of the roller body to form turbulent flow, and the core target of designing the positive spiral groove and the negative spiral groove in the printing roller is to improve cooling uniformity and heat exchange efficiency; and cooling liquid can conveniently enter the roller body without influencing normal rotation of the roller body, so that the printing roller for green printing has the effect of increasing cooling.

Description

Technical Field

[0001] This utility model relates to the field of green printing technology, specifically to a cooling device for printing rollers used in green printing. Background Technology

[0002] During the printing process, printing rollers generate a significant amount of heat due to friction and ink drying. If not cooled promptly, this can lead to decreased print quality and equipment damage. The basic concept of a cooling roller is to cool the printing material, preventing ink and coatings from drying too quickly at high temperatures, thus affecting print quality. The cooling roller uses its own cooling system to remove heat, maintaining ink adhesion and reducing material deformation caused by sudden temperature changes. The function of the cooling roller is to maintain a stable temperature of the printing material by removing heat through its cooling system, thereby ensuring print quality and extending the lifespan of the equipment.

[0003] In the existing technology, the cooling methods of printing rollers mainly include water cooling, air cooling and oil cooling. Among them, water cooling is widely used due to its high efficiency and cost advantages. However, the traditional water cooling unidirectional flow is prone to forming laminar flow, which limits the heat exchange efficiency and makes it difficult to meet the heat dissipation requirements of high-speed printing. Therefore, we designed a low-cost and highly uniform cooling structure to achieve efficient heat exchange of bidirectional spiral in single-in single-out mode, thereby increasing the cooling effect of traditional printing rollers. Utility Model Content

[0004] The purpose of this invention is to provide a green printing roller cooling device to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a green printing roller cooling device, comprising a roller body, a spiral cooling water channel built into the roller body, and a rotating inlet and outlet connected to an external water pump, facilitating the entry of external coolant into the roller body. The spiral cooling water channel includes a left-hand spiral channel and a right-hand spiral channel, causing the coolant to flow in turbulence in the middle of the roller body. The core objective of designing two spiral grooves in opposite directions inside the printing roller is to improve cooling uniformity and heat exchange efficiency, avoiding overheating at one end of the roller body caused by a unidirectional spiral. At the same time, the spiral channel gradually contracts as it approaches the middle and expands as it moves away from the middle, utilizing the Venturi effect to reduce energy loss and maintain flow stability. Furthermore, a microneedle array is provided inside the spiral cooling water channel, which increases the heat exchange area compared to a pure spiral channel. Both ends of the roller body are provided with journals, and both journals have circular holes communicating with the rotating inlet and outlet.

[0006] Based on the above technical solution, the present invention can be further improved as follows.

[0007] Preferably, a rotary joint is provided in the circular hole at the end of the journal, and the liquid outlet end of the rotary joint extends to the rotating water inlet of the roller body. The water inlet hole of the rotary joint is connected to a water inlet pipe, and the water inlet pipe is connected to a water pump. By providing a rotary joint, it is easy to fix it between the water pipe and the rotating roller shaft, ensuring that there is no leakage when water flows in and out.

[0008] Preferably, a fixing plate is provided on the journal, and the side of the fixing plate has a groove identical to that of the journal, and the fixing plate has a hole adapted to the water inlet pipe. By providing the fixing plate, it is convenient to limit and protect the two ends of the roller body, thereby increasing the stability of the roller body rotation.

[0009] Preferably, the journal surface is engaged with a transmission gear, and a drive motor is provided on the side of the transmission gear. By providing the transmission gear and the drive motor, it is convenient to provide power for the rotation of the roller.

[0010] Preferably, the surface of the drive motor is provided with a motor cover, and the fixing plate is provided with a groove adapted to the transmission gear. The drive motor is connected to the fixing plate through the motor cover on its surface. By providing the motor cover, it is convenient to protect the drive motor and the transmission gear, and the motor cover is set in the fixing plate.

[0011] Preferably, the water outlet of the roller body has the same structure as the rotary water inlet, and the rotary joint of the water outlet is provided with a water outlet pipe. The water outlet end of the water outlet pipe is provided with a water pump. By setting the water outlet pipe and the water pump, it is easy to form a two-way forced circulation of "inlet pressurization + outlet suction", the flow rate is stable, and air resistance and backflow stagnation are avoided.

[0012] Beneficial effects

[0013] Compared with the prior art, the technical solution of this application has the following beneficial technical effects:

[0014] This invention features a bidirectional spiral water channel inside the roller body, which causes the coolant to flow in turbulence in the middle of the roller body. The core objective of designing two spiral grooves inside the printing roller is to improve cooling uniformity and heat exchange efficiency. At the same time, by setting rotary joints at both ends of the roller body, it is easy for the coolant to enter the roller body without affecting the normal rotation of the roller body, thereby giving the green printing roller an enhanced cooling effect. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the orthographic section of the present invention;

[0016] Figure 2 This is a front view structural diagram of the present invention;

[0017] Figure 3 for Figure 1Enlarged structural diagram at point A in the middle.

[0018] In the diagram: 1. Roller body; 2. Left-hand spiral water channel; 3. Right-hand spiral water channel; 4. Journal; 5. Rotary inlet; 6. Outlet; 7. Rotary joint; 8. Inlet pipe; 9. Fixing plate; 10. Transmission gear; 11. Drive motor; 12. Outlet pipe. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0020] Please see Figure 1-3 This utility model provides a technical solution: a green printing roller cooling device, including a roller body 1, a spiral cooling water channel built into the roller body 1, and a rotating water inlet 5 and a water outlet 6 connected to an external water pump, so that external coolant can enter the roller body 1. The spiral cooling water channel includes a left-hand spiral water channel 2 and a right-hand spiral water channel 3, so that the coolant is counter-current in the middle of the roller body 1 to form turbulence. The core objective of designing two spiral grooves (bidirectional spiral water channel) inside the printing roller is to improve cooling uniformity and heat exchange efficiency, and avoid overheating at one end of the roller body 1 caused by unidirectional spiral. At the same time, the spiral water channel gradually contracts (accelerates) when approaching the middle and gradually expands (decelerates) when away from the middle, using the Venturi effect to reduce energy loss and maintain flow stability.

[0021] Furthermore, a microneedle array is provided inside the spiral cooling water channel. By setting the microneedle array, the heat exchange area can be increased compared to a pure spiral water channel. Both ends of the roller body 1 are provided with journals 4, and both journals 4 are provided with round holes that communicate with the rotating water inlet 5 and the water outlet 6.

[0022] A rotary joint 7 is provided in the circular hole at the end of the journal 4, and the liquid outlet end of the rotary joint 7 extends into the rotating water inlet 5 of the roller body 1. The water inlet hole of the rotary joint 7 is connected to the water inlet pipe 8, and the water inlet pipe 8 is connected to the water pump. By setting the rotary joint 7, it is easy to fix it between the water pipe and the rotating roller shaft, ensuring that there is no leakage when the water flows in and out. A fixing plate 9 is provided on the journal 4, and the side of the fixing plate 9 has the same groove as the journal 4, and the fixing plate 9 has a hole that matches the water inlet pipe 8. By setting the fixing plate 9, it is easy to limit and protect the two ends of the roller body 1, and increase the stability of the rotation of the roller body 1.

[0023] The journal 4 has a transmission gear 10 meshing with its surface, and a drive motor 11 is provided on the side of the transmission gear 10. By providing the transmission gear 10 and the drive motor 11, it is convenient to provide power for the rotation of the roller 1. The surface of the drive motor 11 is provided with a motor cover, and the fixing plate 9 has a groove that matches the transmission gear 10. The drive motor 11 is connected to the fixing plate 9 through the motor cover on its surface. By providing the motor cover, it is convenient to protect the drive motor 11 and the transmission gear 10, and the motor cover is set in the fixing plate 9.

[0024] The water outlet 6 of the roller body 1 has the same structure as the rotating water inlet 5, and the rotating joint 7 of the water outlet 6 is provided with a water outlet pipe 12. The water outlet end of the water outlet pipe 12 is provided with a water pump. By setting the water outlet pipe 12 and the water pump, it is easy to form a two-way forced circulation of "inlet pressurization + outlet suction", the flow rate is stable, and air resistance and backflow stagnation are avoided.

[0025] In this embodiment, by setting a bidirectional spiral water channel inside the roller body 1, the coolant is made to flow in turbulence in the middle of the roller body 1. The core objective of designing two spiral grooves in opposite directions inside the printing roller is to improve cooling uniformity and heat exchange efficiency. At the same time, by setting a rotary joint 7 at both ends of the roller body 1, the coolant can enter the roller body 1 without affecting the normal rotation of the roller body 1, thereby increasing the cooling effect of the green printing roller.

[0026] The mechanisms, components, and parts in this utility model that are not specifically described are all existing structures that already exist in the prior art and can be purchased directly from the market.

[0027] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art 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 appended claims and their equivalents.

Claims

1. A cooling device for printing rollers used in green printing, characterized in that: It includes a roller body (1), a spiral cooling water channel built into the roller body (1), and a rotating water inlet (5) and a water outlet (6) connected to an external water pump. The spiral cooling water channel includes a left-hand spiral water channel (2) and a right-hand spiral water channel (3), and a micro needle array is provided in the spiral cooling water channel. Both ends of the roller body (1) are provided with journals (4), and both journals (4) are provided with round holes that communicate with the rotating water inlet (5) and the water outlet (6).

2. The green printing roller cooling device according to claim 1, characterized in that: A rotary joint (7) is provided in the round hole at the end of the journal (4), and the liquid outlet end of the rotary joint (7) extends into the rotary water inlet (5) of the roller body (1). The water inlet hole of the rotary joint (7) is connected to a water inlet pipe (8), and the water inlet pipe (8) is connected to a water pump.

3. The green printing roller cooling device according to claim 1, characterized in that: A fixing plate (9) is provided on the journal (4), and the fixing plate (9) has a groove on its side that is the same as that on the journal (4), and the fixing plate (9) has a hole that is compatible with the water inlet pipe (8).

4. The cooling device for a printing roller in green printing according to claim 1, characterized in that: The journal (4) is meshed with a transmission gear (10), and a drive motor (11) is provided on the side of the transmission gear (10).

5. A cooling device for a printing roller in green printing according to claim 4, characterized in that: The surface of the drive motor (11) is provided with a motor cover, and the fixing plate (9) has a groove adapted to the transmission gear (10). The drive motor (11) is connected to the fixing plate (9) through the motor cover on its surface.

6. A cooling device for printing rollers in green printing according to claim 1, characterized in that: The outlet (6) of the roller body (1) has the same structure as the rotating inlet (5), and the rotating joint (7) of the outlet (6) is provided with an outlet pipe (12), and the outlet end of the outlet pipe (12) is provided with a water pump.

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