Conductive paste printing device

Abstract

The utility model provides a conductive paste printing device, and relates to the technical field of electronic tag production, the conductive paste printing device is provided with a printing mechanism, the printing mechanism is provided with a paste tank, a mold roller, a paste passing roller, a compression roller and a scraper, the paste passing roller, the compression roller and the scraper are all attached to the outer side of the mold roller, the paste passing roller is arranged behind the compression roller, and the scraper is arranged between the paste passing roller and the compression roller. Printing paper passes through the space between the mold roller and the pressing roller; the mold roller is rotatably arranged above the slurry tank, and a printing tank is formed in the side face of the mold roller; the mold roller rotates to drive the paste passing roller to rotate, the conductive paste is fed between the paste passing roller and the mold roller, the printing groove is filled with the conductive paste, and the scraper evenly scrapes the conductive paste attached to the outer side face of the mold roller; the printing paper is tightly pressed on the mold roller by the pressing roller, and the conductive paste in the printing groove is attached to the printing paper; the slurry passing roller and the die roller rotate together, under the condition that the rotating speed of the slurry passing roller and the rotating speed of the die roller are high, it can be guaranteed that conductive slurry is well attached to the outer side face of the die roller, and the device can efficiently produce electronic tags.

Description

Technical Field

[0001] This application relates to the field of electronic tag manufacturing technology, and in particular to a conductive paste printing device. Background Technology

[0002] With the continuous advancement of RFID component manufacturing technology, RFID electronic tag manufacturing methods based on printing processes have emerged in the market. These methods use gravure printing and other techniques to print a liquid, conductive paste onto a substrate according to a pre-set pattern. The paste is then dried and cured using methods such as heating and photocuring to obtain a conductive RFID electronic tag. For example, invention 201810111964.1 discloses a method for preparing graphene conductive ink that can be used for RFID electronic tags, and invention 201910216604.2 discloses a graphene-based RFID antenna and its printing method.

[0003] Existing RFID electronic tag production equipment has the following drawbacks: the conductive inks used for printing RFID electronic tags are all based on water-based resins, which have slightly poor conductivity during use. Due to the characteristics of metal conductive powder and graphene itself, the slurry system has poor dispersion and uniformity, and poor performance stability. In addition, water-based conductive slurries have slow drying speeds, making them difficult to match with gravure printing processes, resulting in low production capacity. Summary of the Invention

[0004] The purpose of this application is to address the shortcomings of the above-mentioned technologies and provide a conductive paste printing device.

[0005] Therefore, this application provides a conductive paste printing device, which includes a printing mechanism. The printing mechanism includes a paste tank, a mold roller, a paste delivery roller, a pressure roller, and a scraper. The paste delivery roller, pressure roller, and scraper are all attached to the outside of the mold roller. The paste delivery roller is located behind the pressure roller, and the scraper is located between the paste delivery roller and the pressure roller. The paste tank contains conductive paste, and the paste delivery roller is partially immersed in the conductive paste. The mold roller is rotatably located above the paste tank, and a printing groove is provided on the side of the mold roller.

[0006] Preferably, both the pressure roller and the scraper are movable, with the pressure roller moving inward to be closer to the mold roller and moving outward to be away from the mold roller, and the scraper moving inward to be closer to the mold roller and moving outward to be away from the mold roller.

[0007] Preferably, a slurry feeding mechanism is also provided, which includes a raw material cylinder, a conveying pipe and a slurry pump. The conveying pipe is located between the raw material cylinder and the slurry tank, and the slurry pump is located on the conveying pipe.

[0008] Preferably, the raw material cylinder is equipped with a first temperature control mechanism, which is used to control the temperature of the conductive paste inside the raw material cylinder.

[0009] Preferably, the slurry tank is equipped with a liquid control mechanism, which is used to control the depth of the conductive slurry in the slurry tank.

[0010] Preferably, the liquid control mechanism is provided with an overflow pipe, and a connecting port is provided between the overflow pipe and the slurry tank, with the position of the connecting port being level with the liquid level in the slurry tank.

[0011] Preferably, the device also includes a drying mechanism and a take-up mechanism. The drying mechanism has a drying box, and the take-up mechanism has a rotatable take-up roller. The drying box is located behind the take-up roller.

[0012] Preferably, the slurry tank is equipped with a second temperature control mechanism, which is used to control the temperature of the conductive slurry in the slurry tank.

[0013] The beneficial effects of this application are:

[0014] The rotation of the die roller drives the transfer roller, which is attached to the die roller, to rotate. The conductive paste in the paste groove adheres to the outer side of the transfer roller and is fed between the transfer roller and the die roller. The conductive paste fills the printing groove. The doctor blade scrapes the conductive paste adhering to the outer side of the die roller evenly. The pressure roller approaches the die roller and presses the printing paper onto the die roller. The conductive paste in the printing groove adheres to the printing paper. The transfer roller and the die roller rotate together. Even at high speeds, the conductive paste can still adhere well to the outer side of the die roller. This device can produce electronic tags efficiently. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this application, 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 application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the printing device;

[0017] Figure 2 This is a schematic diagram illustrating the working principle of the printing device.

[0018] Figure 3 This is a schematic diagram of the nozzle;

[0019] Figure 4 This is a schematic diagram of the molding roller.

[0020] 1 is the printing mechanism, 11 is the slurry tank, 12 is the mold roller, 121 is the printing groove, 13 is the slurry delivery roller, 14 is the pressure roller, 141 is the cylinder, 15 is the scraper, 151 is the swing arm, 16 is the hydraulic control mechanism, 161 is the overflow pipe, 162 is the connecting port, 17 is the second temperature control mechanism, 171 is the circulating water pipe, and 172 is the temperature-controlled water tank.

[0021] 2 is the slurry feeding mechanism, 21 is the raw material cylinder, 22 is the slurry feeding pipe, 23 is the slurry supply pump, 24 is the nozzle, and 25 is the first temperature control mechanism;

[0022] 3 is the drying mechanism, and 31 is the drying box;

[0023] 4 is the take-up mechanism, and 41 is the take-up roller;

[0024] 5 is printing paper. Detailed Implementation

[0025] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of this application and are not intended to limit this application. Unless otherwise specified, the methods used in this application are conventional methods; the raw materials and apparatus used, unless otherwise specified, are conventional commercially available products.

[0026] Example

[0027] Depend on Figures 1 to 4 As shown, this application provides a conductive paste printing device, which includes a printing mechanism 1. The printing mechanism 1 includes a paste tank 11, a die roller 12, a paste delivery roller 13, a pressure roller 14, and a doctor blade 15. The paste delivery roller 13, the pressure roller 14, and the doctor blade 15 are all attached to the outside of the die roller 12. The paste delivery roller 13 is located behind the pressure roller 14, and the doctor blade 15 is located between the paste delivery roller 13 and the pressure roller 14. The printing paper passes through the space between the die roller 12 and the pressure roller 14. The paste tank 11 contains conductive paste, and the paste delivery roller 13 is partially immersed in the conductive paste. The die roller 12 is rotatably located above the paste tank 11, and the side of the die roller 12 has a printing groove 121, the shape of which is adapted to the shape of the label.

[0028] Both the pressure roller 14 and the scraper 15 are movable. A cylinder 141 is provided on the outer side of the pressure roller 14, and a swing arm 151 is provided at the rear end of the scraper 15. The cylinder 141 pushes the pressure roller 14 to move inward closer to the mold roller 12 and outward away from the mold roller 12. The swing arm 151 rotates, driving the scraper 15 to move inward closer to the mold roller 12 and outward away from the mold roller 12.

[0029] The printing device is also equipped with a paste feeding mechanism 2, which includes a raw material cylinder 21, a conveying pipe 22, a paste supply pump 23, and a nozzle 24. The conveying pipe 22 is located between the raw material cylinder 21 and the nozzle 24, and the paste supply pump 23 is located on the conveying pipe 22. The front end of the nozzle 24 points between the paste delivery roller 13 and the mold roller 12. The conveying pipe 22 connects the raw material cylinder 21 and the nozzle 24. When the paste supply pump 23 is running, it can send the conductive paste in the raw material cylinder 21 through the conveying pipe 22 and the nozzle 24 to the space between the paste delivery roller 13 and the mold roller 12. Excess conductive paste falls into the paste tank 11.

[0030] Multiple nozzles 24 are provided, and the multiple nozzles 24 are evenly distributed along a direction parallel to the rotation axis of the mold roller 12 to ensure that sufficient conductive paste is fed between the paste delivery roller 13 and the mold roller 12; the opening of the nozzle 24 is flat, and the width of the opening of the nozzle 24 gradually increases from the inside to the outside to ensure that the conductive paste is evenly distributed between the paste delivery roller 13 and the mold roller 12.

[0031] The raw material cylinder 21 is equipped with a first temperature control mechanism 25, which is used to control the temperature of the conductive paste inside the raw material cylinder 21. In this embodiment, the first temperature control mechanism 25 is an insulated box, and the raw material cylinder 21 is placed entirely in the insulated box.

[0032] The slurry tank 11 is equipped with a liquid control mechanism 16, which is used to control the depth of the conductive slurry in the slurry tank 11.

[0033] The liquid control mechanism 16 is equipped with an overflow pipe 161, and a connecting port 162 is provided between the overflow pipe 161 and the slurry tank 11. The position of the connecting port 162 is level with the liquid level in the slurry tank 11. The liquid control mechanism 16 is used to control the depth of the conductive slurry in the slurry tank 11, so as to avoid the liquid level in the slurry tank 11 being too low, which would result in the conductive slurry not filling the printing slot 121 well, and also to avoid the liquid level in the slurry tank 11 being too high, which would cause the slurry to be thrown out of the slurry tank 11.

[0034] The system also includes a drying mechanism 3 and a take-up mechanism 4. The drying mechanism 3 has a drying chamber 31, and the take-up mechanism 4 has a rotatable take-up roller 41. The drying chamber 31 is located behind the take-up roller 41. The printing paper passes through the drying chamber 31 and is then wound onto the take-up roller 41. In this embodiment, the drying chamber 31 has multiple stages, and the curing effect of the electronic tag can be adjusted by regulating the temperature of the drying chamber 31.

[0035] The slurry tank 11 is equipped with a second temperature control mechanism 17, which is used to control the temperature of the conductive slurry inside the slurry tank 11. The second temperature control mechanism 17 includes a circulating water pipe 171 and a temperature-controlled water tank 172. The circulating water pipe 171 is located below the slurry tank 11. The temperature-controlled water tank 172 controls the water temperature and drives the water to circulate within the circulating water pipe 171, ensuring a stable temperature of the conductive slurry inside the slurry tank 11. In this embodiment, heat-conducting oil is also filled between the circulating water pipes 171 to ensure uniform temperature of the conductive slurry inside the slurry tank 11.

[0036] The working method of this application is as follows:

[0037] Test paper 5 passes between mold roller 12 and pressure roller 14; swing arm 151 drives doctor blade 15 to swing towards mold roller 12 until it is against mold roller 12; mold roller 12 rotates, driving the transfer roller 13 against mold roller 12 to rotate, conductive paste in the paste trough 14 adheres to the outer side of transfer roller 13 and is fed between transfer roller 13 and mold roller 12, conductive paste fills printing groove 121, doctor blade 13 scrapes the conductive paste adhered to the outer side of mold roller 12 evenly; cylinder 141 drives pressure roller 14 to approach mold roller 12 and presses printing paper 5 onto mold roller 12, conductive paste in printing groove 121 adheres to printing paper 5; printing paper 5 enters drying chamber 31, so that the conductive paste on test paper 6 solidifies and sets, take-up roller 41 is used to wind and collect printing paper with electronic tags printed on it.

[0038] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A conductive paste printing device, comprising a printing mechanism, characterized in that, The printing mechanism includes a slurry tank, a mold roller, a slurry delivery roller, a pressure roller, and a scraper. The slurry delivery roller, the pressure roller, and the scraper are all attached to the outside of the mold roller. The slurry delivery roller is located behind the pressure roller, and the scraper is located between the slurry delivery roller and the pressure roller. The slurry tank contains conductive slurry, and the slurry delivery roller is partially immersed in the conductive slurry. The mold roller is rotatably located above the slurry tank, and a printing groove is provided on the side of the mold roller.

2. The conductive paste printing apparatus according to claim 1, characterized in that, Both the pressure roller and the scraper are movable. The pressure roller moves inward to be closer to the mold roller and moves outward to be away from the mold roller. The scraper moves inward to be closer to the mold roller and moves outward to be away from the mold roller.

3. The conductive paste printing apparatus according to claim 1 or 2, characterized in that, It is also equipped with a slurry feeding mechanism, which includes a raw material cylinder, a conveying pipe and a slurry supply pump. The conveying pipe is located between the raw material cylinder and the slurry tank, and the slurry supply pump is located on the conveying pipe.

4. The conductive paste printing apparatus according to claim 3, characterized in that, The raw material cylinder is equipped with a first temperature control mechanism, which is used to control the temperature of the conductive paste inside the raw material cylinder.

5. The conductive paste printing apparatus according to claim 1 or 2, characterized in that: The slurry tank is equipped with a liquid control mechanism, which is used to control the depth of the conductive slurry in the slurry tank.

6. The conductive paste printing apparatus according to claim 5, characterized in that: The liquid control mechanism is equipped with an overflow pipe, and a communication port is provided between the overflow pipe and the slurry tank. The position of the communication port is level with the liquid level in the slurry tank.

7. The conductive paste printing apparatus according to claim 1 or 2, characterized in that: It also includes a drying mechanism and a take-up mechanism. The drying mechanism is equipped with a drying box, and the take-up mechanism is equipped with a rotatable take-up roller. The drying box is located behind the take-up roller.

8. The conductive paste printing apparatus according to claim 1 or 2, characterized in that: The slurry tank is equipped with a second temperature control mechanism, which is used to control the temperature of the conductive slurry in the slurry tank.

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