Gluing shaft heating device of flexo printing machine

Abstract

The utility model discloses a gluing shaft heating device of a flexographic printing machine, which relates to the technical field of printing devices and is applied to the heating work of a gluing shaft, a hollow cavity is arranged inside the gluing shaft, an air inlet is arranged on one side of the gluing shaft, an air outlet is arranged on the other side of the gluing shaft, and the gluing shaft is arranged in the hollow cavity. A switch valve is installed in the exhaust port, a one-way valve is installed in the air inlet, the air inlet is connected with an air inlet pipe through a rotary sealing connector, and the end, away from the rotary sealing connector, of the air inlet pipe is connected with a hot air output device. According to the glue spreading device, the hollow cavity is formed in the glue spreading shaft, and the air inlet and the air outlet are formed, so that the hot air output device can convey hot air into the hollow cavity through the air inlet pipe and the rotary sealing joint when the glue spreading device is used, and then the glue spreading shaft can be efficiently heated; through the arrangement of the structure, heat loss in the transmission process is reduced, then the heating efficiency of the gluing shaft is effectively improved, and the practicability of the device is enhanced.

Description

Technical Field

[0001] This utility model relates to the field of printing equipment technology, specifically a heating device for the coating shaft of a flexographic printing press. Background Technology

[0002] Trademarks, labels, stickers, and other products are typically printed on flexible composite paper, with adhesive applied to the other side for easy pasting. When the printing press stops, adhesive residue remains on the coating roller, especially in winter when it tends to stick. Upon restarting, the coating roller needs to be heated to quickly melt the solidified adhesive and allow for normal operation. Current technology primarily uses heating blocks inside the coating roller, which not only complicates the roller's structure but also makes repairs complicated if the heating blocks malfunction, disrupting production. A utility model patent (Chinese Patent Publication No. CN209613396U) proposes a coating roller heating device for flexographic printing presses. This device offers a simple structure that does not alter the original structure of the coating roller, effectively heating it and rapidly melting the solidified adhesive, thus facilitating normal operation of the flexographic printing press. Furthermore, since it does not interfere with the coating shaft, the coating shaft heating device of the flexographic printing press is easy to install and maintain. However, after studying the existing technology and the aforementioned patents, it was found that during the process of heating the coating shaft by blowing air through a straight pipe, the hot air dissipates into the air, consuming some of the heat, thus reducing the heating efficiency of the coating shaft. Therefore, this utility model proposes a coating shaft heating device for a flexographic printing press. Utility Model Content

[0003] Technical problems to be solved

[0004] The purpose of this invention is to overcome the shortcomings of the existing technology and provide a heating device for the coating shaft of a flexographic printing press.

[0005] Technical solution

[0006] To achieve the above objectives, this utility model provides the following technical solution: a heating device for a coating shaft of a flexographic printing press, used for heating the coating shaft. The coating shaft has a hollow cavity inside, an air inlet on one side, and an exhaust port on the other side. A switching valve is installed inside the exhaust port, and a one-way valve is installed inside the air inlet. The air inlet is connected to an air inlet pipe via a rotary sealing joint. A hot air output device is connected to the end of the air inlet pipe away from the rotary sealing joint. By providing a hollow cavity inside the coating shaft and providing an air inlet and exhaust port, the hot air output device can deliver hot air through the air inlet pipe and rotary sealing joint into the hollow cavity during use, thereby efficiently heating the coating shaft. This structure reduces heat loss during transmission, effectively improving the heating efficiency of the coating shaft and enhancing the practicality of the device. The hot air output device includes a housing, inside which a heating wire is installed, and inside the housing is also a blowing fan.

[0007] Preferably, an air inlet is provided on one side of the device housing.

[0008] Preferably, an exhaust port is provided on the side of the device housing away from the second air inlet, and the second exhaust port is connected to the end of the air inlet pipe away from the rotary sealing joint.

[0009] Preferably, filter cloth is installed at both air inlets.

[0010] Preferably, the air inlet is located at the center of one side of the adhesive application shaft, and a drive shaft is located at the center of the side of the adhesive application shaft away from the air inlet, with a drive wheel fixedly mounted on the drive shaft.

[0011] Preferably, an installation shaft is provided on the outside of the air inlet, and the installation shaft is fixedly mounted on the adhesive application shaft.

[0012] Preferably, bearings are installed on both the drive shaft and the mounting shaft.

[0013] Beneficial effects:

[0014] Compared with existing technologies, the coating shaft heating device of this flexographic printing press has the following advantages:

[0015] This invention features a hollow cavity inside the coating shaft, with an air inlet and an exhaust outlet. During use, the hot air output device can deliver hot air through the air inlet pipe and a rotary sealing joint into the hollow cavity, thereby efficiently heating the coating shaft. This structure reduces heat loss during transmission, effectively improving the heating efficiency of the coating shaft and enhancing the practicality of the device. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the structure of this utility model;

[0018] Figure 2 This is a cross-sectional structural diagram of the present invention;

[0019] Figure 3 This is a cross-sectional view of the adhesive coating shaft of this utility model;

[0020] Figure 4 This is a cross-sectional structural diagram of the hot gas output device of this utility model.

[0021] In the picture:

[0022] 1. Glue-applying shaft; 2. Hollow cavity; 3. Air inlet; 4. Exhaust outlet; 5. Switch valve; 6. Check valve; 7. Rotary sealing joint; 8. Air inlet pipe; 9. Hot air output device; 10. Drive shaft; 11. Drive wheel; 12. Mounting shaft; 13. Bearing; 901. Device housing; 902. Heating wire; 903. Air blowing fan; 904. Second air inlet; 905. Second exhaust outlet; 906. Filter cloth. Detailed Implementation

[0023] 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.

[0024] Please see Figures 1-4As shown, this utility model provides a technical solution: a heating device for the coating shaft of a flexographic printing machine, used for heating the coating shaft 1. The coating shaft 1 has a hollow cavity 2 inside, an air inlet 3 on one side, and an exhaust port 4 on the other side. A switch valve 5 is installed inside the exhaust port 4, and a one-way valve 6 is installed inside the air inlet 3. The air inlet 3 is connected to an air inlet pipe 8 through a rotary sealing joint 7. A hot air output device 9 is connected to the end of the air inlet pipe 8 away from the rotary sealing joint 7. By setting a hollow cavity 2 inside the coating shaft 1 and setting an air inlet 3 and an exhaust port 4, the hot air output device 9 can deliver hot air into the hollow cavity 2 through the air inlet pipe 8 and the rotary sealing joint during use, thereby efficiently heating the coating shaft 1. This structure reduces heat loss during transmission, thereby effectively improving the heating efficiency of the coating shaft 1 and enhancing the practicality of the device.

[0025] Please refer to the following carefully. Figure 2 and Figure 4 The hot air output device 9 includes a device housing 901, a heating wire 902 installed inside the device housing 901, a blower fan 903 installed inside the device housing 901, an air inlet 904 on one side of the device housing 901, an exhaust port 905 on the side of the device housing 901 away from the air inlet 904, the exhaust port 905 is connected to the end of the air inlet pipe 8 away from the rotary sealing joint 7, and a filter cloth 906 is installed at the air inlet 904.

[0026] Please refer to the following carefully. Figure 2 and Figure 3 The air inlet 3 is located at the center of one side of the glue-applying shaft 1. A drive shaft 10 is located at the center of the side of the glue-applying shaft 1 away from the air inlet 3. A drive wheel 11 is fixedly installed on the drive shaft 10. An installation shaft 12 is located outside the air inlet 3. The installation shaft 12 is fixedly installed on the glue-applying shaft 1. Bearings 13 are installed on both the drive shaft 10 and the installation shaft 12.

[0027] Working principle: The hot air output device 9 can deliver hot air to the hollow cavity 2 through the air inlet pipe 8, the rotary sealing joint 7 and the one-way valve 6, thereby efficiently heating the adhesive-coating shaft 1.

[0028] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0029] 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 heating device for the coating shaft of a flexographic printing press, used for heating the coating shaft (1), characterized in that: The glue-applying shaft (1) has a hollow cavity (2) inside. An air inlet (3) is provided on one side of the glue-applying shaft (1), and an exhaust port (4) is provided on the other side of the glue-applying shaft (1). A switch valve (5) is installed inside the exhaust port (4). A one-way valve (6) is installed inside the air inlet (3). The air inlet (3) is connected to an air inlet pipe (8) through a rotary sealing joint (7). A hot air output device (9) is connected to the end of the air inlet pipe (8) away from the rotary sealing joint (7). The hot air output device (9) includes a device housing (901). A heating wire (902) is installed inside the device housing (901). A blowing fan (903) is also provided inside the device housing (901).

2. The coating shaft heating device for a flexographic printing press according to claim 1, characterized in that: An air inlet (904) is provided on one side of the device housing (901).

3. The glue-coating shaft heating device for a flexographic printing press according to claim 1, characterized in that: The device housing (901) has an exhaust port (905) on the side away from the second air inlet (904), and the exhaust port (905) is connected to the end of the air inlet pipe (8) away from the rotary sealing joint (7).

4. The coating shaft heating device for a flexographic printing press according to claim 2, characterized in that: A filter cloth (906) is installed at the second air inlet (904).

5. The glue-coating shaft heating device for a flexographic printing press according to claim 1, characterized in that: The air inlet (3) is located at the center of one side of the glue-applying shaft (1), and a drive shaft (10) is located at the center of the side of the glue-applying shaft (1) away from the air inlet (3). A drive wheel (11) is fixedly installed on the drive shaft (10).

6. The coating shaft heating device for a flexographic printing press according to claim 5, characterized in that: An installation shaft (12) is provided on the outside of the air inlet (3), and the installation shaft (12) is fixedly installed on the glue application shaft (1).

7. The coating shaft heating device for a flexographic printing press according to claim 6, characterized in that: Bearings (13) are installed on both the drive shaft (10) and the mounting shaft (12).

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