Cooling device for a printing press

Abstract

The application relates to a cooling device for a printing machine, and relates to the technical field of printing equipment, which comprises an upper and lower connected box structure, a centrifugal fan and an air inlet are mounted on the outer wall of the upper box, a flow guide plate is arranged in the interior, and the cooling mechanism is formed together, a guide roller assembly is arranged in the upper box, the guide roller assembly comprises a driving guide roller fixedly arranged and a driven guide roller movably connected, and the key point is that the outer wall of the upper box is provided with an adjusting support, a strip-shaped hole is formed in the side wall, the driven guide roller penetrates through the strip-shaped hole and is driven to reciprocate in the vertical direction by the adjusting support, in addition, a filter screen and a quick-release mechanism comprising a trapezoidal lock block and a spring are arranged at the air outlet of the lower box. The application has the advantages that the height of the driven guide roller is changed through the adjusting support, the material conveying path and the wind receiving angle are flexibly adjusted, the precise regulation and control of the cooling effect are realized, the filter screen is quickly disassembled and assembled without tools through the quick-release mechanism, and the process adaptability and the maintenance efficiency of the equipment are greatly improved.

Description

Technical Field

[0001] This utility model relates to the field of printing equipment technology, and in particular to a cooling device for a printing press. Background Technology

[0002] In modern printing industry production, in order to ensure the quality and production efficiency of printed materials, a key cooling and drying process is usually required after ink printing. The traditional method is to use a cooling device to deliver cold air to the surface of the printed material during transmission. The airflow accelerates the evaporation of solvents in the ink and the curing of the ink layer, thereby preventing sticking or blurring of the pattern during winding and ensuring the yield of the final product.

[0003] However, existing cooling devices for printing presses are often structurally simple. The guide roller assembly used to guide material transport is usually directly fixed to the side wall of the housing, resulting in a fixed trajectory for the material inside the housing. This design means that when the printed material passes through the air vent or baffle area, the angle, distance, and duration of contact with the cold air are all constant. However, in actual production, depending on the printing process, there are significant differences in the substrate materials used (such as paper or plastic film of different thicknesses) and the thickness of the ink coating.

[0004] This fixed transmission structure is difficult to adapt to diverse process requirements. For example, when dealing with thicker ink layers that require enhanced drying, or when dealing with heat-sensitive materials that require adjusting the airflow angle to prevent material deformation, the existing fixed structure cannot flexibly adjust the contact state between the material and the cold air. This limitation often leads to some products not drying completely and sticking together, or the material flatness being affected by improper airflow angle, severely limiting the applicability of the equipment and the improvement of printing quality.

[0005] Therefore, this utility model proposes a cooling device for printing presses to overcome the shortcomings of the prior art. Utility Model Content

[0006] To overcome the above deficiencies, this utility model provides a cooling device for printing presses, which aims to improve the problem in some existing cooling devices for printing presses where the fixed position of the internal guide rollers makes it impossible to adjust the airflow distance and angle of the printed material, thus making it difficult to adapt to the drying requirements of different printing processes.

[0007] This utility model provides a cooling device for a printing press, comprising: an upper housing, and a lower housing fixedly connected to the bottom of the upper housing, a centrifugal fan fixedly installed on the outer wall of the upper housing, an air inlet sealed to the air outlet of the centrifugal fan, the air inlet communicating with the internal cavity of the upper housing, a guide plate fixedly installed inside the upper housing directly below the air inlet, and a guide roller assembly disposed inside the upper housing, wherein the centrifugal fan, the air inlet, and the guide plate together constitute a cooling mechanism.

[0008] The upper housing is fixedly mounted on the outer wall of the upper housing. The guide roller assembly includes an active guide roller and a driven guide roller. The active guide roller is rotatably mounted on the inner wall of the upper housing, and the driven guide roller is rotatably connected to the movable end of the adjustment bracket.

[0009] Furthermore, a strip-shaped hole is provided on the side wall of the upper housing corresponding to the position of the driven guide roller. The driven guide roller passes through the strip-shaped hole and is connected to the adjusting bracket. The driven guide roller is driven to reciprocate in the vertical direction by the adjusting bracket. An air outlet is provided on the side wall of the lower housing, and a filter screen is installed on the inner wall of the air outlet.

[0010] Preferably, the filter screen outer frame is equipped with a quick-release mechanism, which is used to quickly assemble and disassemble the filter screen. The quick-release mechanism includes a connector, a locking block, a sliding block, a connecting rod, and a spring. The connector is fixedly connected to the outer wall of the filter screen, and a groove is formed on the inner wall of the connector. The locking block is inserted into the groove and fixedly disposed at the end of the sliding block. The sliding block is slidably fitted inside the lower housing. The connecting rod is fixedly connected to the sliding block, and the spring is sleeved on the outer wall of the connecting rod, and the spring always abuts against the surface of the sliding block.

[0011] Preferably, the groove cross-sectional shape is set as an equilateral trapezoid, and the locking block cross-sectional shape is set as an equilateral trapezoid adapted to the groove. The locking block uses the trapezoidal inclined surface to achieve self-locking and force-unlocking functions.

[0012] Preferably, the adjusting bracket includes a fixed base and a lifting slider. The fixed base is fixedly installed on the outer wall of the upper housing, the lifting slider is slidably connected to the fixed base, and the lifting slider is rotatably connected to the end of the driven guide roller.

[0013] Preferably, the internal cavity of the upper housing is divided into a pressure stabilizing cavity and a flow guiding cavity by the guide plate. The centrifugal fan blows air into the pressure stabilizing cavity and guides it to the flow guiding cavity through the guide plate to cool the material.

[0014] Preferably, the two ends of the active guide roller are rotatably mounted on the inner walls of opposite sides of the upper housing via bearings, and the position of the active guide roller is relatively fixed, which is used to provide basic support for material transmission.

[0015] Preferably, the air outlet is connected to the interior of the lower housing through a vent, and the vent opening is located in the area below the driven guide roller to receive the cooled airflow, which is then discharged after being filtered by the filter screen.

[0016] Preferably, the guide plate is tilted at an angle pointing towards the material conveying area below the guide roller assembly, in order to concentrate and guide the high-speed airflow to the material surface and accelerate solvent evaporation.

[0017] This utility model has the following beneficial effects:

[0018] 1. This utility model solves the problem in the prior art that the cooling device of a printing press cannot adjust the angle and distance of the material being exposed to the wind due to the fixed position of the guide roller by setting an adjustment bracket on the outer wall of the upper box and cooperating with the side wall strip hole to drive the driven guide roller to move in the vertical direction. It achieves the technical effect of being able to flexibly adjust the material transmission path in the box according to the needs of different printing process stages, thereby changing the relative position and wind wrap angle between the material and the guide plate, and achieving precise control of cooling intensity and drying effect.

[0019] 2. This utility model solves the problem of cumbersome filter screen disassembly and maintenance procedures and low efficiency caused by the need for tools in the prior art by setting a quick-release mechanism including a connector, trapezoidal locking block, sliding block and spring at the air outlet of the lower box. It utilizes the squeezing cooperation of the trapezoidal inclined surface and the elastic reset principle of the spring. It achieves the technical effect of automatically locking and quickly unlocking the filter screen without any auxiliary tools, simply by pushing and pulling, which greatly improves the efficiency of daily cleaning and maintenance of the equipment.

[0020] 3. This utility model solves the problem of poor cooling targeting and low efficiency caused by direct airflow diffusion in the prior art by setting a guide plate directly below the air inlet inside the upper housing and tilting the guide plate towards the material conveying area below the guide roller assembly. It achieves the technical effect of directionally guiding and concentrating the high-speed airflow generated by the centrifugal fan onto the surface of the printed material, accelerating solvent evaporation and ink drying, and ensuring uniform cooling. Attached Figure Description

[0021] Figure 1 This is a three-dimensional schematic diagram of a cooling device for a printing press according to the present invention;

[0022] Figure 2 This is a schematic diagram of the structure of an adjusting bracket for a cooling device for a printing press, as proposed in this utility model.

[0023] Figure 3 This is a schematic diagram of the driven guide roller of a cooling device for a printing press according to the present invention;

[0024] Figure 4 This is a schematic diagram of the structure of a filter screen for a cooling device for a printing press according to the present invention;

[0025] Figure 5 for Figure 4 Enlarged view of point A in the middle.

[0026] Legend:

[0027] 1. Upper box;

[0028] 2. Cooling mechanism; 21. Lower casing; 22. Centrifugal fan; 23. Air inlet; 24. Bearing; 25. Adjusting bracket; 26. Filter screen;

[0029] 27. Guide roller assembly; 271. Driven guide roller; 272. Driven guide roller;

[0030] 28. Deflector plate;

[0031] 3. Quick-release mechanism; 31. Connector; 32. Locking block; 33. Sliding block; 34. Connecting rod; 35. Spring. Detailed Implementation

[0032] 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.

[0033] Example:

[0034] Reference Figures 1 to 5 This utility model provides a cooling device for a printing press, which aims to solve the problems in the prior art where the fixed air drying distance and angle during the cooling process of printed materials cannot adapt to different drying needs, and the cumbersome and inefficient disassembly and maintenance of filter components.

[0035] like Figure 1 and Figure 2As shown, the device includes an upper housing 1 and a lower housing 21 fixedly connected to the bottom of the upper housing 1. The upper housing 1 serves as the main cooling chamber, and the lower housing 21 serves as the mounting base for the waste gas recovery and filtration components. A centrifugal fan 22 is fixedly installed on the side wall of the upper housing 1. An air inlet 23 is sealed to the air outlet of the centrifugal fan 22. The air inlet 23 penetrates the side wall of the upper housing 1 and extends to the internal cavity of the upper housing 1. A guide plate 28 is fixedly installed inside the upper housing 1 directly below the air inlet 23. The centrifugal fan 22, the air inlet 23, and the guide plate 28 together constitute the cooling mechanism 2. The airflow generated by the centrifugal fan 22 during operation is introduced into the interior of the upper housing 1 through the air inlet 23 and guided by the guide plate 28 to impact the surface of the material at a specific angle, thereby achieving the drying and cooling of the printed material.

[0036] like Figure 3 As shown, the upper housing 1 is equipped with a guide roller assembly 27 for conveying and guiding materials. The guide roller assembly 27 includes a driving guide roller 271 and a driven guide roller 272. The two ends of the driving guide roller 271 are rotatably mounted on the inner walls of opposite sides of the upper housing 1 via bearings 24. The driving guide roller 271 is relatively fixed in position and is used to provide basic support and power transmission for material conveying. An adjusting bracket 25 is fixedly installed on the outer wall of the upper housing 1. A strip-shaped hole extending vertically is opened on the side wall of the upper housing 1 corresponding to the position of the driven guide roller 272. The end of the driven guide roller 272 passes through the strip-shaped hole and is rotatably connected to the adjusting bracket 25. The movable end of the bracket 25 is used to drive the driven guide roller 272 to reciprocate in the vertical direction. By adjusting the height position of the driven guide roller 272, the wrap angle and height of the material at the driven guide roller 272 can be changed, thereby adjusting the distance and angle of contact between the material and the airflow when it passes under the guide plate 28, so as to meet the different cooling intensity requirements of different printing process stages. It also includes a quick-release mechanism 3, which forms a specific structural cooperation and connection relationship with the lower box 21 and the filter screen 26 to realize the convenient disassembly and assembly of the filter screen 26. The detailed technical features are as follows.

[0037] Reference Figure 4 and Figure 5 The lower housing 21 has a ventilation opening on its inner wall. One end of the ventilation opening is located directly below the driven guide roller 272 to receive the cooled airflow carrying waste heat. The other end of the ventilation opening is connected to the outer wall of the lower housing 21 to form an air outlet. A filter screen 26 is inserted and installed on the inner wall of the air outlet. The filter screen 26 is used to intercept dust and impurities carried in the airflow. A quick-release mechanism 3 is installed on the outer frame of the filter screen 26. The quick-release mechanism 3 is used to provide a quick locking and unlocking function between the filter screen 26 and the lower housing 21.

[0038] The quick-release mechanism 3 includes a connector 31, a locking block 32, a sliding block 33, a connecting rod 34, and a spring 35. The connector 31 is fixedly connected to the outer wall of the filter screen 26. The connector 31 moves synchronously with the filter screen 26. A groove is provided on the inner wall of the side of the connector 31 facing the lower housing 21. The cross-sectional shape of the groove is set as an equilateral trapezoid. The cross-sectional shape of the locking block 32 is set as an equilateral trapezoid that matches the groove. The locking block 32 can be inserted into the groove. The self-locking and force-unlocking functions are realized by the cooperation of the trapezoidal inclined surface.

[0039] The lower housing 21 has an installation cavity inside near the air outlet. The sliding block 33 is slidably fitted in the installation cavity. The sliding direction of the sliding block 33 is perpendicular to the insertion and removal direction of the filter screen 26. The sliding block 33 is used to support the locking block 32 and provide lateral displacement guidance. The locking block 32 is fixedly set at the end of the sliding block 33 near the air outlet, and the end of the locking block 32 can extend out of the installation cavity and into the air outlet area to cooperate with the connector 31.

[0040] One end of the connecting rod 34 is fixedly connected to the side of the sliding block 33 away from the locking block 32. The connecting rod 34 is used to guide and support the spring 35. The spring 35 is sleeved on the outer wall of the connecting rod 34. One end of the spring 35 abuts against the surface of the sliding block 33, and the other end abuts against the inner wall of the mounting cavity. The spring 35 always applies a spring force to keep the sliding block 33 and the locking block 32 moving towards the air outlet, ensuring that the locking block 32 can be stably inserted into the groove of the connecting piece 31 under normal conditions, thereby locking the filter screen 26.

[0041] When the filter screen 26 needs to be removed, pull the filter screen 26 outward. The filter screen 26 drives the connector 31 to move outward. The edge of the connector 31 abuts against and presses the trapezoidal inclined surface of the locking block 32, forcing the locking block 32 to drive the sliding block 33 to overcome the elastic force of the spring 35 and slide back into the mounting cavity, thereby releasing the locking restriction on the connector 31 and completing the quick removal of the filter screen 26. Conversely, when inserting the filter screen 26, the connector 31 presses the locking block 32 back again. After the groove is aligned with the locking block 32, the locking block 32 automatically snaps into the groove under the action of the spring 35 to complete the locking.

[0042] Based on the above embodiments, the present invention may also include the following preferred technical solutions.

[0043] In a preferred embodiment, the adjusting bracket 25 specifically includes a fixed base and a lifting slider. The fixed base is fixedly installed on the outer wall of the upper housing 1, and the lifting slider is slidably connected to the fixed base. The lifting slider is rotatably connected to the end of the driven guide roller 272. The fixed base is also provided with a screw or cylinder drive assembly for driving the lifting slider. Those skilled in the art can choose manual knob adjustment or electric adjustment according to actual needs to control the precise lifting of the driven guide roller 272.

[0044] As a preferred embodiment, a sealing cover is also provided at the through-hole of the adjusting bracket 25 or the driven guide roller 272. The sealing cover is preferably made of flexible rubber sealing strip or a sliding plate structure. The sealing cover can move synchronously with the driven guide roller 272 and always cover the open area of ​​the strip hole to ensure the airtightness of the box.

[0045] In a preferred embodiment, one end of the shaft of the active guide roller 271 extends out of the outer wall of the upper box 1 and is connected to the output shaft of the external drive motor through a coupling or belt pulley. The external drive motor drives the active guide roller 271 to rotate at a constant speed, thereby tractioning the printing material to run smoothly inside the box.

[0046] As a preferred embodiment, the trapezoidal bevel at the front end of the locking block 32 is designed with an angle between 45 and 60 degrees. This ensures that the filter screen 26 will not fall off when subjected to a slight accidental impact, and also ensures that the locking block 32 can be smoothly squeezed back when sufficient pulling force is applied manually. A guide bushing can also be provided between the connecting rod 34 and the inner wall of the mounting cavity to reduce sliding friction resistance and prevent the sliding block 33 from getting stuck.

[0047] As a preferred embodiment, the air outlet of the guide plate 28 can be designed as a converging nozzle or a louver. The tilt angle of the guide plate 28 is set to point towards the material conveying area below the guide roller assembly 27, so that the high-speed airflow can be concentrated and evenly covered on the material surface, accelerating solvent evaporation and ink drying.

[0048] The working principle of this utility model is as follows.

[0049] When the cooling device for the printing press starts working, the external drive motor drives the active guide roller 271 to rotate, conveying the material to the guide roller assembly 27 area. The material passes around the active guide roller 271 and the driven guide roller 272 in sequence, forming a transmission plane between them. The centrifugal fan 22 is started, and the external air is forced into the pressure-stabilizing cavity inside the upper box 1 through the air inlet 23. The airflow is then guided by the guide plate 28 to form an air curtain with a certain speed and direction, which directly impacts the surface of the material located below the guide roller assembly 27, forcibly drying and cooling the ink or solvent on the material.

[0050] When adjusting the cooling intensity according to different printing processes, the operator drives the end of the driven guide roller 272 to move vertically within the strip hole by adjusting the bracket 25, thereby changing the height of the driven guide roller 272. The change in the height of the driven guide roller 272 directly causes the path and wrap angle of the material to change when it passes under the guide plate 28, thereby adjusting the material's wind distance and wind angle, and achieving precise control of the cooling effect.

[0051] During the cooling process, exhaust gas carrying heat and volatiles enters the lower chamber 21 and is filtered by the filter screen 26 before being discharged to the external environment. When the filter screen 26 needs to be cleaned or replaced due to dust accumulation, the operator pulls the filter screen 26 outward. The filter screen 26 drives the connecting piece 31 to move outward. The edge of the trapezoidal groove of the connecting piece 31 presses against the trapezoidal inclined surface of the locking block 32, forcing the locking block 32 to drive the sliding block 33 and the connecting rod 34 to retract into the mounting cavity and compress the spring 35. When the locking block 32 is completely out of the groove, the filter screen 26 can be removed.

[0052] After cleaning or replacing the filter 26, push the filter 26 into the air outlet. The connector 31 will press the locking block 32 back again until the groove is aligned with the position of the locking block 32. Under the action of the spring 35, the locking block 32 will automatically pop out and lock into the groove, realizing the quick reset and locking of the filter 26. The entire maintenance process does not require any additional tools and is simple and efficient to operate.

[0053] The embodiments described in this specific implementation are preferred embodiments of this application and are not intended to limit the scope of protection of this application. Identical components are represented by the same reference numerals. Therefore, all equivalent changes made to the structure, shape, and principle of this application should be covered within the scope of protection of this application.

Claims

1. A cooling device for a printing press, comprising an upper housing (1) and a lower housing (21) fixedly installed at the bottom of the upper housing (1), wherein a cooling mechanism (2) is installed at the bottom of the upper housing (1), and a guide roller assembly (27) is provided inside the upper housing (1). A centrifugal fan (22) is installed on the side wall of the upper housing (1). The air outlet of the centrifugal fan (22) is connected to an air inlet (23). The air inlet (23) is connected to the internal cavity of the upper housing (1). A guide plate (28) is fixedly installed inside the upper housing (1) below the air inlet (23). The centrifugal fan (22), the air inlet (23) and the guide plate (28) constitute the cooling mechanism (2). Its features are, The guide roller assembly (27) includes an active guide roller (271) and a driven guide roller (272). The active guide roller (271) is rotatably mounted on the inner wall of the upper housing (1) via a bearing (24). An adjusting bracket (25) is fixedly mounted on the outer wall of the upper housing (1). A strip-shaped hole is provided on the side wall of the upper housing (1) for the driven guide roller (272) to pass through. The end of the driven guide roller (272) passes through the side wall of the upper housing (1) and is rotatably connected to the movable end of the adjusting bracket (25). The adjusting bracket (25) is configured to adjust the height of the end of the driven guide roller (272) to change the position of the driven guide roller (272) relative to the guide plate (28).

2. The cooling device for a printing press according to claim 1, characterized in that, The lower housing (21) has a ventilation opening on its inner wall. One end of the ventilation opening is located below the driven guide roller (272), and the other end is opened on the outer wall of the lower housing (21) to form an air outlet. A filter screen (26) is installed on the inner wall of the air outlet. A quick-release mechanism (3) for quickly installing and removing the filter screen (26) is installed on the outer frame of the filter screen (26).

3. A cooling device for a printing press according to claim 2, characterized in that, The quick-release mechanism (3) includes a connector (31), a locking block (32), a sliding block (33), a connecting rod (34), and a spring (35); The connector (31) is fixedly connected to the outer wall of the filter screen (26), and the locking block (32), the sliding block (33), the connecting rod (34) and the spring (35) are provided on the lower box (21).

4. A cooling device for a printing press according to claim 3, characterized in that, The inner wall of the connector (31) is provided with a groove, the cross-sectional shape of the groove is an equilateral trapezoid, the cross-sectional shape of the locking block (32) is an equilateral trapezoid that matches the groove, and the locking block (32) can be inserted into the groove.

5. A cooling device for a printing press according to claim 4, characterized in that, The lower housing (21) has an installation cavity near the air outlet. The sliding block (33) is slidably fitted in the installation cavity, and the sliding direction of the sliding block (33) is perpendicular to the moving direction of the filter (26). The locking block (32) is fixedly installed at one end of the sliding block (33) near the air outlet.

6. A cooling device for a printing press according to claim 5, characterized in that, One end of the connecting rod (34) is fixedly connected to the side of the sliding block (33) away from the locking block (32), and the spring (35) is sleeved on the outer wall of the connecting rod (34).

7. A cooling device for a printing press according to claim 6, characterized in that, One end of the spring (35) abuts against the sliding block (33), and the other end abuts against the inner wall of the mounting cavity. The spring (35) is configured to apply a spring force that keeps the locking block (32) moving toward the air outlet.

8. A cooling device for a printing press according to claim 7, characterized in that, The edge of the connector (31) is configured to press the inclined surface of the locking block (32), causing the locking block (32) to drive the sliding block (33) to slide outward and drive the connecting rod (34) to move while pressing the spring (35).

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