Drying device for multicolor screen printing machine

Abstract

The utility model discloses a drying device for a multicolor screen printing machine. The drying device comprises a drying oven and a transmission belt, the drying oven is of a hollow box body structure, the belt face of the transmission belt is a hollowed-out belt face, the transmission belt transversely penetrates through the drying oven, a vertical partition plate is arranged in the drying oven, an air blower and a heating box are installed on the partition plate, a motor is fixed to a shell of the air blower, and an output shaft of the motor and an input shaft of the air blower are coaxially fixed. The air outlet end of the air blower is communicated with the interior of the heating box, the side, away from the air blower, of the heating box extends out to the top of the drying oven through an air pipe of a pipeline structure, a drying barrel of a lower opening barrel-shaped structure is installed at the top end in the drying oven, and the upper portion of the drying barrel is connected with the air pipe. The device has the beneficial effects that printed products cannot shift, and the printing precision is high.

Description

Technical Field

[0001] The utility model belongs to the technical field of silk screen printing, and particularly relates to a drying device for a multi-color silk screen printing machine. Background Art

[0002] Screen printing is an important technology for modern printed matter spray printing. The screen is used as the base to make a screen printing plate with graphics. After printing, the printed matter needs to be dried. With the increasing requirements for printed products, many printed products require multi-color screen printing. Some existing operations use multiple groups of screen printing machines to print one color respectively. Several screen printing machines are combined to complete the multi-color screen printing requirements. However, after the previous group of screen printing machines has finished printing, the ink has not dried yet and the next group of screen printing needs to be printed. This will cause the ink to merge, resulting in color difference, mottled, and dragging of the printed patterns and fonts, which reduces the quality of the printed products. Therefore, a drying device is usually set behind the screen printing machine.

[0003] The Chinese utility model patent with publication number CN212636880U discloses a drying box for screen printing, including a main box body, a first electric telescopic column is installed on the internal top of the main box body, a first drying structure is installed on the output end of the first electric telescopic column, the first drying structure is composed of a mounting plate, a heating box, a normal temperature nozzle, a high temperature nozzle, a heating wire and a temperature sensor, the heating wire and the temperature sensor are installed in the heating box, a conveyor belt support frame is installed in the main box body, support rollers are installed at both ends of the conveyor belt support frame, a conveyor belt is installed on the support roller, a second drying structure is installed in the conveyor belt support frame, and the second drying structure is the same as the first drying structure. The utility model heats and dries the printed matter by a high-temperature nozzle, and then cools and dries the printed matter by a normal-temperature nozzle, which makes the device more convenient to use. The nozzle directly uses a high-temperature gas jet to the printed product, and the conveyor belt is not hollowed out. Excessive airflow can easily enter the lower surface of the printed product from the gap between the printed product and the belt surface, lift the printed product, cause the printed product to shift, and affect the printing accuracy of the next color of the silk screen printer. Utility Model Content

[0004] The utility model aims to provide a drying device for a multi-color screen printer, so as to solve the technical problem in the background technology that the drying box in the above-mentioned background technology easily affects the printing accuracy of the next color screen printer after drying.

[0005] The above technical objectives of the utility model are achieved through the following technical solutions:

[0006] A drying device for a multi-color screen printing machine, comprising an oven and a transmission belt; the oven is a hollow box structure, the belt surface of the transmission belt is a hollow belt surface, the transmission belt crosses the oven, a vertical partition is provided inside the oven, a blower and a heating box are installed on the partition, a motor is fixed to the shell of the blower, the output shaft of the motor and the input shaft of the blower are coaxially fixed, the air outlet end of the blower is connected and communicated with the inside of the heating box, the side of the heating box away from the blower protrudes to the top of the oven through an air duct of a pipeline structure, a drying cylinder with a lower open cylindrical structure is installed at the top of the oven, and the upper part of the drying cylinder is connected to the air duct.

[0007] Furthermore, in order to further improve the adsorption force of the hollow belt surface of the transmission belt and prevent the printed product from shifting, an electrostatic spring bar is installed on the inner wall of the oven below the hollow belt surface. The electrostatic spring bar has an elastic tendency to deflect toward the transmission belt side. The electrostatic spring bar relies on this elastic tendency to maintain contact with the hollow belt surface. An electrostatic generator is installed inside the oven. The electrostatic generator and the electrostatic spring bar are electrically connected through a wire, and the surface of the hollow belt surface is coated with a conductive layer.

[0008] Furthermore, in order to facilitate the placement of the device, the oven and the transmission belt are supported by legs, and the bottoms of all the legs are located in the same plane.

[0009] Furthermore, in order to facilitate replacement of a drying cylinder of corresponding size according to the appearance of the printed matter, the drying cylinder is fixed under a cylinder cover of a plate-like structure, and a receiving hole for receiving the cylinder cover is provided on the drying oven, and the cylinder cover and the hole are detachably connected.

[0010] Furthermore, in order to realize the detachable connection of the drum cover, the drum cover is detachably connected to the receiving hole on the oven by means of a buckle.

[0011] Furthermore, in order to further facilitate the overall replacement of the drying drum and the drum cover, the air duct is a high-temperature resistant hose or a high-temperature resistant corrugated tube, and the air duct and the drying drum are detachably connected.

[0012] Furthermore, in order to improve the heating efficiency of the heating box, the heating box is provided with equidistantly arranged heating tubes, and the electrodes of the heating tubes are connected in parallel using wires.

[0013] Furthermore, in order to facilitate heat recovery, the oven is provided with an opening below the transmission belt, and a recovery bucket with a cover structure is provided at the opening. The recovery bucket is externally connected to a recovery pipe with negative pressure suction. Both sides of the oven are closed with sealing plates except for the opening reserved for the transmission belt and the printed materials thereon to pass through.

[0014] Furthermore, in order to avoid the loss of static grounding, the roller on the transmission belt that drives the hollow belt surface to move is made of insulating plastic.

[0015] In summary, the utility model has the following beneficial effects:

[0016] ① It will not cause the printed product to shift, and the printing precision is high: through the establishment of the hollow belt surface, the screen printing machine upstream of the transmission belt rotation direction prints one color on the printed product, and then the printed product is transported to the bottom of the drying cylinder by the conveyor belt. The motor drives the blower to work, and the blower blows the heated airflow in the heating box to the air duct. The air duct transfers the high-temperature airflow to the drying cylinder, and the drying cylinder blows the airflow onto the printed product to quickly dry the undried ink on the printed product. Because the belt surface of the conveyor belt is a hollow belt surface, the excess airflow will not enter the gap between the printed product and the belt surface, causing the printed product to shift, affecting the next printing operation of the screen printing machine, and improving the printing precision.

[0017] ② With electrostatic adsorption function, it further reduces the displacement rate of printed products: because of the establishment of the electrostatic generator, the electrostatic generator will electrostaticize the hollow belt surface of the transmission belt through the electrostatic spring strip, so that the printed products can be electrostatically adsorbed on the transmission belt when the transmission belt transports the printed products, further avoiding the displacement of the printed products on the transmission belt. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0019] Figure 2 It is a structural schematic diagram of the drying cylinder in the utility model;

[0020] Figure 3 It is a structural schematic diagram of the electrostatic spring strip in the utility model;

[0021] Figure 4 It is a schematic diagram of the top view structure of the utility model;

[0022] Figure 5 yes Figure 4 Schematic diagram of the AA section structure;

[0023] Figure 6 yes Figure 5 A magnified view of the structure at B in the middle;

[0024] Figure 7 It is a schematic diagram of the use structure of the utility model;

[0025] In the figure, 1. drying oven; 2. transmission belt; 3. blower; 4. motor; 5. heating box; 6. air duct; 7. cylinder cover; 8. recovery bucket; 9. drying cylinder; 10. supporting legs; 11. static electricity generator; 12. static electricity spring strip; 13. screen printing machine; 21. hollow belt surface; 51. heating tube; 71. buckle. DETAILED DESCRIPTION

[0026] The utility model is further described in detail below in conjunction with the accompanying drawings.

[0027] Example:

[0028] See also Figure 1-Figure 7 , the utility model provides a technical solution:

[0029] A drying device for a multi-color screen printing machine comprises: an oven 1 and a transmission belt 2; the oven 1 is a hollow box structure, the belt surface of the transmission belt 2 is a hollow belt surface 21, the transmission belt 2 crosses the oven 1, a vertical partition is provided inside the oven 1, a blower 3 and a heating box 5 are installed on the partition, a motor 4 is fixed on the shell of the blower 3, the output shaft of the motor 5 is coaxially fixed with the input shaft of the blower 3, the air outlet end of the blower 3 is connected and communicated with the inside of the heating box 5, the side of the heating box 5 away from the blower 3 protrudes to the top of the oven 1 through a duct 6 of a pipeline structure, a drying cylinder 9 with a lower open cylindrical structure is installed at the top of the oven 1, and the upper part of the drying cylinder 9 is connected to the duct 6.

[0030] An electrostatic spring strip 12 is installed on the inner wall of the oven 1 below the hollow belt surface 21. The electrostatic spring strip 12 has an elastic tendency to deflect toward the side of the transmission belt 2. The electrostatic spring strip 12 relies on the elastic tendency to maintain contact with the hollow belt surface 21. An electrostatic generator 11 is installed inside the oven 1. The electrostatic generator 11 and the electrostatic spring strip 12 are electrically connected through a wire. The surface of the hollow belt surface 21 is coated with a conductive layer.

[0031] The oven 1 and the transmission belt 2 are supported by legs 10, and the bottoms of all the legs 10 are located in the same plane.

[0032] The drying cylinder 9 is fixed under a cylinder cover 7 of a plate-like structure. A receiving hole for receiving the cylinder cover 7 is provided on the oven 1. The cylinder cover 7 is detachably connected to the receiving hole on the oven 1 by means of a buckle 71.

[0033] The air duct 6 is a high temperature resistant hose or a high temperature resistant corrugated tube, and the air duct 6 and the drying drum 9 are detachably connected.

[0034] The heating box 5 is provided with heating tubes 51 arranged at equal intervals, and the electrodes of the heating tubes 51 are connected in parallel using wires.

[0035] The oven 1 is provided with an opening below the transmission belt 2, and a recovery bucket 8 with a cover structure is provided at the opening. The recovery bucket 8 is externally connected to a recovery pipe with negative pressure suction. Both sides of the oven 1 are closed with sealing plates except for the opening reserved for the transmission belt 2 and the printed materials thereon to pass through (the sealing plates are not shown in the figure for the convenience of showing the internal structure).

[0036] The roller on the transmission belt 2 that drives the hollow belt surface 21 to move is made of insulating plastic.

[0037] When using, Figure 7 As shown, a screen printer 13 is provided on both sides of the utility model, the transmission belt 2 is connected to an external power source to rotate, the motor 4 and the heating tube 51 are powered on and work, and the screen printer 13 upstream of the transmission belt 2 in the direction of rotation prints one color on the printed product, and then the conveyor belt 2 transports the printed product to the bottom of the drying drum 9;

[0038] The motor 4 drives the blower 3 to work, and the blower 3 blows the heated air in the heating box 5 to the air duct 6. The air duct 6 transfers the high-temperature air flow to the drying cylinder 9. The drying cylinder 9 blows the air flow onto the printed product to quickly dry the undried ink on the printed product. Because the belt surface of the conveyor belt 2 is a hollow belt surface 21, the excess air flow will not enter the gap between the printed product and the belt surface, causing the printed product to shift, affecting the next step of the printing operation of the screen printing machine;

[0039] After the printed product is dried, it is conveyed by the conveyor belt 2 to the next screen printing machine 13, and the next screen printing machine 13 performs the screen printing operation of the next color on the printed product. In combination with the above principle, multiple groups of the utility model and multiple groups of screen printing machines are set up according to Figure 7 The silk screen printing of printed products in various colors can be realized by arranging them in this way;

[0040] At the same time, due to the establishment of the electrostatic generator 11, the electrostatic generator 11 will electrostatically charge the hollow belt surface 21 of the transmission belt 2 through the electrostatic spring strip 12, so that the printed product can be electrostatically adsorbed on the transmission belt 2 when the transmission belt 2 transports the printed product, thereby further preventing the displacement of the printed product on the transmission belt 2;

[0041] When it is necessary to replace the drying cylinder 9 according to the size of the printed product, the cylinder cover 7 and the drying cylinder 9 can be removed from the oven 1 as a whole by removing the buckle 71 (the air duct 6 is a hose, which is convenient to remove), and then the air duct 6 and the drying cylinder 9 as well as the cylinder cover 7 and the drying cylinder 9 can be disassembled. Then, according to the shape of the printed product to be printed, a drying cylinder 9 of a suitable size can be selected and fixed under the cylinder cover 7. Then, the buckle 71 can be used to restore the installation of the cylinder cover 7, and then the new drying cylinder 9 and the air duct 6 can be assembled.

[0042] This specific embodiment is merely an explanation of the present invention and is not a limitation of the present invention. After reading this specification, those skilled in the art may make non-creative modifications to the present embodiment as needed, but such modifications are protected by patent law as long as they are within the scope of the claims of the present invention.

Claims

1. A drying device for a multi-color screen printing machine, comprising: A drying oven (1) and a transmission belt (2); characterized in that: the drying oven (1) is a hollow box structure, the belt surface of the transmission belt (2) is a hollow belt surface (21), the transmission belt (2) passes through the drying oven (1), a vertical partition is provided inside the drying oven (1), a blower (3) and a heating box (5) are installed on the partition, a motor (4) is fixed on the shell of the blower (3), the output shaft of the motor (4) and the input shaft of the blower (3) are coaxially fixed, the air outlet end of the blower (3) is connected to the inside of the heating box (5), the side of the heating box (5) away from the blower (3) protrudes to the top of the drying oven (1) through an air duct (6) of a pipeline structure, and a drying cylinder (9) with a lower open cylindrical structure is installed at the top of the inside of the drying oven (1), and the upper part of the drying cylinder (9) is connected to the air duct (6).

2. A drying device for a multi-color screen printer according to claim 1, characterized in that: An electrostatic spring strip (12) is installed on the inner wall of the oven (1) below the hollow belt surface (21). The electrostatic spring strip (12) has an elastic tendency to deflect toward the transmission belt (2). The electrostatic spring strip (12) maintains contact with the hollow belt surface (21) by relying on the elastic tendency. An electrostatic generator (11) is installed inside the oven (1). The electrostatic generator (11) and the electrostatic spring strip (12) are electrically connected through a wire. The surface of the hollow belt surface (21) is coated with a conductive layer.

3. A drying device for a multi-color screen printer according to claim 1, characterized in that: The oven (1) and the transmission belt (2) are supported by legs (10), and the bottoms of all the legs (10) are located in the same plane.

4. A drying device for a multi-color screen printer according to claim 1, characterized in that: The drying cylinder (9) is fixed below a cylinder cover (7) of a plate-like structure. A receiving hole for receiving the cylinder cover (7) is provided on the drying oven (1). The cylinder cover (7) and the hole are detachably connected.

5. A drying device for a multi-color screen printer according to claim 4, characterized in that: The cylinder cover (7) is detachably connected to the receiving hole on the oven (1) by means of a buckle (71).

6. A drying device for a multi-color screen printer according to claim 1, characterized in that: The air duct (6) is a high temperature resistant hose or a high temperature resistant corrugated tube, and the air duct (6) and the drying cylinder (9) are detachably connected.

7. A drying device for a multi-color screen printer according to claim 1, characterized in that: The heating box (5) is provided with heating tubes (51) arranged at equal intervals, and the electrodes of the heating tubes (51) are connected in parallel using wires.

8. The drying device for a multi-color screen printer according to claim 1, characterized in that: The oven (1) is provided with an opening below the transmission belt (2), and a recovery bucket (8) having a cover structure is provided at the opening. The recovery bucket (8) is externally connected to a recovery pipe with negative pressure suction. Both sides of the oven (1) are closed by sealing plates except for the opening reserved for the transmission belt (2) and the printed matter thereon to pass through.

9. The drying device for a multi-color screen printer according to claim 1, characterized in that: The roller on the transmission belt (2) that drives the hollow belt surface (21) to move is made of insulating plastic.

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