A plastic bag printing equipment

Abstract

This utility model provides a plastic bag printing device, belonging to the field of plastic bag technology. It solves the technical problem that when the printing surface and the printing roller are in planar contact, the ink is prone to uneven distribution, especially when printing details and gradient colors, resulting in color differences and blurring. The plastic bag printing device includes an operating table, with an unwinding roller rotatably connected to one side of the top of the operating table, and a take-up roller rotatably connected to the top of the side of the operating table away from the unwinding roller. Tensioning rollers are provided on both sides of the printing roller, and both tensioning rollers are configured to cooperate with the printing roller. Each end of the two tensioning rollers is provided with a constraint mechanism for restraining the tensioning rollers. A drying chamber is fixedly connected inside the operating compartment near the take-up roller, and the drying chamber contains a drying mechanism for drying the plastic bags. In this utility model, the tensioning rollers ensure that the plastic bag can make sufficient contact with the printing roller.

Description

Technical Field

[0001] This utility model belongs to the field of plastic bag technology, and relates to printing equipment, specifically a plastic bag printing device. Background Technology

[0002] A search revealed Chinese patent CN222858997U, which discloses a plastic bag printing device. The device includes a housing. A feeding mechanism and a receiving mechanism for conveying plastic bags are installed on the top of the housing near a corner. Inlet and outlet ports for plastic bags are provided on the top of one end of the housing and on the side near the feeding mechanism. A partition is fixed to the inner wall of the housing near the corner, and the partition has a guide port for the plastic bags to pass through. Multiple support rollers for laying plastic bags are installed inside the housing. An ink storage tank is installed on the bottom inner wall of the housing. This invention ensures uniform ink distribution during printing, prevents a thick layer of ink from forming on the printing rollers and plastic bags, guarantees clear printing, and allows for hot air drying of the printed plastic bags, enabling rapid curing and shaping during the printing process. It also allows for ventilation and cooling of the dried plastic bags, facilitating the winding process.

[0003] The plastic bag printing device in the aforementioned patent has the following shortcomings: during the printing process, the printing surface of the plastic bag is in planar contact with the printing roller, which can easily lead to uneven ink distribution. This is especially true when printing details and gradient colors, where color differences and blurring are likely to occur. Therefore, this problem needs to be solved. Utility Model Content

[0004] The purpose of this utility model is to address the shortcomings of existing technologies by proposing a plastic bag printing device. The technical problem to be solved by this utility model is that the printing surface and the printing roller are in planar contact, which leads to uneven ink distribution, especially when printing details and gradient colors, resulting in color differences and blurring.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A plastic bag printing device includes an operating table. An unwinding roller is rotatably connected to one side of the top of the operating table, and a take-up roller is rotatably connected to the top of the operating table on the side away from the unwinding roller. One end of the take-up roller is equipped with a rotating mechanism for rotating the take-up roller. A common operating chamber is provided between the unwinding roller and the take-up roller. The operating chamber is fixedly connected to the top of the operating table. An ink cartridge is fixedly connected to the top of the operating table near the unwinding roller. An ink roller is rotatably connected inside the ink cartridge. A printing sleeve is fitted onto the surface of the ink roller, and a printing roller is fitted onto the surface of the printing sleeve. The printing roller is rotatably connected to one side of the operating chamber. The top of the operating chamber is equipped with an adjustment mechanism for adjusting the ink rollers. Two stirring rollers are rotatably connected inside the ink cartridge near the ink roller. A rotating mechanism for rotating the stirring rollers is provided at one end of each of the two stirring rollers. Tensioning rollers are provided on both sides of the printing roller, and both tensioning rollers are configured to cooperate with the printing roller. A constraint mechanism for constraining the tensioning rollers is provided at both ends of each tensioning roller. A drying chamber is fixedly connected inside the operating chamber near the take-up roller. The drying chamber is equipped with a drying mechanism for drying plastic bags. The tensioning rollers ensure that the plastic bags can make full contact with the printing roller.

[0007] As a further embodiment of this utility model, the rotating mechanism includes a first motor, which is fixedly connected inside the operating table. The output shaft of the first motor is fixedly connected to a second synchronous pulley. The surface of the take-up roller near the second synchronous pulley is fixedly connected to a first synchronous pulley. The surfaces of the first and second synchronous pulleys are fitted with the same first synchronous belt.

[0008] As a further embodiment of this utility model, the adjustment mechanism includes a second motor, which is fixedly connected to the top of the operating chamber. A fourth synchronous pulley is fixedly connected to the output shaft of the second motor. A third synchronous pulley is fixedly connected to one end of the ink roller and the fourth synchronous pulley. The same second synchronous belt is sleeved on the surfaces of the third and fourth synchronous pulleys. A feed pipe is provided on the surface of the ink cartridge near the third synchronous pulley. A scraper is fitted on the surface of the printing sleeve. Multiple support columns are slidably connected to the surface of the scraper away from the printing sleeve. The other ends of the multiple support columns are fixedly connected to the inside of the ink cartridge. Springs are sleeved on the surfaces of the multiple support columns. One end of each spring is fixedly connected to one side of the inside of the ink cartridge, and the other end of each spring is fixedly connected to one side of the scraper.

[0009] As a further embodiment of this utility model, the rotating mechanism includes a fifth synchronous wheel, which is fixedly connected to one end of the printing sleeve. The ends of the two stirring rollers near the fifth synchronous wheel are each fixedly connected to a sixth synchronous wheel, and the surfaces of the two stirring rollers and the fifth synchronous wheel are fitted with the same third synchronous belt.

[0010] As a further embodiment of this utility model, the constraint mechanism includes a chute, which is opened on one side of the operating chamber. A U-shaped frame is slidably connected inside the chute, and the tension roller is rotatably connected to the bottom of the U-shaped frame. Two limiting rods are fixedly connected inside the chute, and the U-shaped frame is slidably sleeved on the surfaces of the two limiting rods. A tension spring is sleeved on the surface of each of the two limiting rods. The top ends of the two tension springs are fixedly connected to the bottom of the U-shaped frame, and the bottom ends of the two tension springs are fixedly connected to the inner surface of the chute. By setting the tension springs, the tension roller can be constrained.

[0011] As a further embodiment of this utility model, the drying mechanism includes multiple air vents, all of which are located at the bottom of the drying chamber. A heating tube is installed inside each air vent, a fan is installed on the top of each heating tube, and a filter plate is installed on the top of each fan. The heating tube, fan, and filter plate are all fixedly connected inside the drying chamber.

[0012] The beneficial effects of this utility model are as follows:

[0013] 1. This utility model employs a technical solution of constraining the plastic bag using tension rollers, ensuring sufficient contact between the plastic bag and the printing roller. This effectively solves the problem of uneven ink distribution caused by the printing surface being in planar contact with the printing roller, especially when printing details and gradient colors, which can easily lead to color differences and blurring. Tension rollers are installed on both sides of the printing roller, and these tension rollers are lower than the printing roller, ensuring that the plastic bag contacts the printing roller in an inverted V shape. Tension springs are also installed at both ends of the two tension rollers, and both tension springs are connected to the operating chamber. During use, the tension rollers are continuously pulled downwards by the tension springs to ensure sufficient contact between the plastic bag and the printing roller. Furthermore, under the action of the tension springs, the tension rollers can be adjusted immediately if the tension of the plastic bag becomes loose. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of a plastic bag printing equipment proposed in this utility model;

[0015] Figure 2 This is a schematic diagram of the internal structure of a plastic bag printing device proposed in this utility model;

[0016] Figure 3 This is a schematic diagram of the rotating mechanism of a plastic bag printing equipment proposed in this utility model;

[0017] Figure 4 This is a schematic diagram of the adjustment mechanism of a plastic bag printing equipment proposed in this utility model;

[0018] Figure 5 for Figure 4Enlarged structural diagram at point A in the diagram;

[0019] Figure 6 This is a schematic diagram of the constraint mechanism of a plastic bag printing equipment proposed in this utility model;

[0020] Figure 7 for Figure 6 A magnified structural diagram at point B in the diagram.

[0021] In the diagram: 1. Control panel; 2. Ink cartridge; 3. Control chamber; 4. Tension roller; 5. Drying chamber; 101. Unwind roller; 102. Rewind roller; 103. First synchronous pulley; 104. First motor; 105. Second synchronous pulley; 106. First synchronous belt; 201. Ink roller; 202. Printing sleeve; 203. Printing roller; 204. Third synchronous pulley; 205. Second motor; 206. Fourth synchronous pulley; 207. Second synchronous belt; 208. Feed pipe; 209. Scraper; 210. Support column; 211. Spring; 212. Stirring roller; 213. Fifth synchronous pulley; 214. Sixth synchronous pulley; 215. Third synchronous belt; 302. Slide groove; 401. U-shaped frame; 402. Limiting rod; 403. Tension spring; 501. Air outlet; 502. Heating element; 503. Fan; 504. Filter plate. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0023] Reference Figure 1 - Figure 7A plastic bag printing device includes an operating table 1. An unwinding roller 101 is rotatably connected to one side of the top of the operating table 1. A take-up roller 102 is rotatably connected to the top of the side of the operating table 1 away from the unwinding roller 101. One end of the take-up roller 102 is provided with a rotating mechanism for rotating the take-up roller 102. An operating chamber 3 is provided between the unwinding roller 101 and the take-up roller 102. The operating chamber 3 is fixedly connected to the top of the operating table 1. An ink cartridge 2 is fixedly connected to the top of the side of the operating table 1 near the unwinding roller 101. An ink roller 201 is rotatably connected inside the ink cartridge 2. A printing sleeve 202 is fitted onto the surface of the ink roller 201. A printing roller 203 is fitted onto the surface of the printing sleeve 202. The printing roller 203 is rotatably connected to one side of the operating chamber 3. The top of the operating chamber 3 is provided with a mechanism for rotating the ink roller 202. The adjustment mechanism of the ink roller 201 is adjusted. Two stirring rollers 212 are rotatably connected inside the ink cartridge 2 near the ink roller 201. A rotating mechanism for rotating the stirring rollers 212 is provided at one end of each stirring roller 212. The ink in the ink cartridge 2 can be stirred by the stirring rollers 212. Tensioning rollers 4 are provided on both sides of the printing roller 203, and the two tensioning rollers 4 are configured to cooperate with the printing roller 203. Both ends of the two tensioning rollers 4 are provided with a constraint mechanism for constraining the tensioning rollers 4. A drying chamber 5 is fixedly connected inside the operating chamber 3 near the take-up roller 102. The drying chamber 5 is provided with a drying mechanism for drying plastic bags. The tensioning rollers 4 can ensure that the plastic bags can make full contact with the printing roller 203.

[0024] Preferably, the rotating mechanism includes a first motor 104, which is fixedly connected inside the operating table 1. The output shaft of the first motor 104 is fixedly connected to a second synchronous pulley 105. A first synchronous pulley 103 is fixedly connected to the surface of the take-up roller 102 near the second synchronous pulley 105. The same first synchronous belt 106 is sleeved on the surfaces of the first synchronous pulley 103 and the second synchronous pulley 105. The take-up roller 102 can be rotated by the first synchronous belt 106.

[0025] Preferably, the adjustment mechanism includes a second motor 205, which is fixedly connected to the top of the operating chamber 3. The output shaft of the second motor 205 is fixedly connected to a fourth synchronous pulley 206. The ink roller 201 is fixedly connected to a third synchronous pulley 204 at one end of the fourth synchronous pulley 206. The third synchronous pulley 204 and the fourth synchronous pulley 206 are fitted with the same second synchronous belt 207. The ink cartridge 2 is provided with a feed pipe 208 on the side of the side near the third synchronous pulley 204. The printing sleeve 202 is fitted with a scraper 209. Multiple support columns 210 are slidably connected to the side of the scraper 209 away from the printing sleeve 202. The other ends of the multiple support columns 210 are all fixedly connected to the inside of the ink cartridge 2. Springs 211 are fitted on the surface of the multiple support columns 210. One end of the multiple springs 211 is fixedly connected to one side of the inside of the ink cartridge 2, and the other end of the multiple springs 211 is fixedly connected to one side of the scraper 209. The ink roller 201 can be adjusted by the setting of the second synchronous belt 207.

[0026] Preferably, the rotating mechanism includes a fifth synchronous wheel 213, which is fixedly connected to one end of the printing sleeve 202. A sixth synchronous wheel 214 is fixedly connected to the end of each of the two stirring rollers 212 near the fifth synchronous wheel 213. The same third synchronous belt 215 is sleeved on the surface of the two stirring rollers 212 and the fifth synchronous wheel 213. The stirring rollers 212 can be rotated by the setting of the third synchronous belt 215.

[0027] Preferably, the constraint mechanism includes a chute 302, which is located on one side of the operating chamber 3. A U-shaped frame 401 is slidably connected inside the chute 302. The tension roller 4 is rotatably connected to the bottom of the U-shaped frame 401. Two limiting rods 402 are fixedly connected inside the chute 302. The U-shaped frame 401 is slidably sleeved on the surface of the two limiting rods 402. A tension spring 403 is sleeved on the surface of each of the two limiting rods 402. The top ends of the two tension springs 403 are fixedly connected to the bottom of the U-shaped frame 401, and the bottom ends of the two tension springs 403 are fixedly connected to the inner surface of the chute 302. The tension roller 4 can be constrained by the tension springs 403.

[0028] Preferably, the drying mechanism includes multiple air vents 501, all of which are located at the bottom of the drying chamber 5. A heating tube 502 is installed inside the air vent 501, a fan 503 is installed on the top of the heating tube 502, and a filter plate 504 is installed on the top of the fan 503. The heating tube 502, the fan 503, and the filter plate 504 are all fixedly connected inside the drying chamber 5. The plastic bags can be dried by the heating tube 502.

[0029] Working principle: During use, the plastic bag passes sequentially through the bottom of the front tension roller 4, the top of the printing roller 203, and the bottom of the rear tension roller 4, before reaching the take-up roller 102. The take-up roller 102 is connected to the first motor 104 via the first synchronous belt 106. When the first motor 104 starts, the take-up roller 102 can wind up the plastic bag. Tension rollers 4 are provided on both sides of the printing roller 203, and the tension rollers 4 are lower than the printing roller 203, ensuring that the plastic bag contacts the printing roller 203 in an inverted V shape. Tension springs 403 are installed at both ends of the two tension rollers 4, and both tension springs 403 are connected to the operating chamber 3. During use, the tension rollers 4 are continuously pulled downwards by the tension springs 403 to ensure that the plastic bag makes full contact with the printing roller 203. Under the action of the tension spring 403, when the tension of the plastic bag becomes loose, the tension roller 4 can also be adjusted immediately. During the printing process, the second motor 205 will start. The output shaft of the second motor 205 is equipped with a second synchronous belt 207, and the other end of the second synchronous belt 207 is equipped with an ink roller 201. So when the second motor 205 starts, the ink roller 201 can rotate. The ink roller 201 is connected to the printing roller 203 through the printing sleeve 202, so as to ensure that the printing roller 203 can work normally. Agitator rollers 212 are installed on both sides of the ink roller 201, and the agitator rollers 212 are connected to the ink roller 201 through the third synchronous belt 215. So when the ink roller 201 rotates, the agitator rollers 212 will also rotate, thereby achieving the purpose of agitating the ink.

[0030] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A plastic bag printing apparatus comprising an operating table (1), characterized in that, A unwinding roller (101) is rotatably connected to one side of the top of the operating table (1). A take-up roller (102) is rotatably connected to the top of the side of the operating table (1) away from the unwinding roller (101). One end of the take-up roller (102) is provided with a rotating mechanism for rotating the take-up roller (102). The same operating chamber (3) is provided between the unwinding roller (101) and the take-up roller (102). The operating chamber (3) is fixedly connected to the top of the operating table (1). An ink cartridge (2) is fixedly connected to the top of the side of the operating table (1) near the unwinding roller (101). An ink roller (201) is rotatably connected inside the ink cartridge (2). A printing sleeve (202) is fitted on the surface of the ink roller (201). A printing roller (203) is fitted on the surface of the printing sleeve (202). The roller (203) is rotatably connected to one side of the operating chamber (3). The top of the operating chamber (3) is provided with an adjustment mechanism for adjusting the ink roller (201). The ink cartridge (2) is rotatably connected to two stirring rollers (212) on the side near the ink roller (201). The two stirring rollers (212) are provided with a rotating mechanism for rotating the stirring rollers (212) on one side. Tensioning rollers (4) are provided on both sides of the printing roller (203), and the two tensioning rollers (4) are configured to cooperate with the printing roller (203). The two tensioning rollers (4) are provided with a constraint mechanism for constraining the tensioning rollers (4) at both ends. The operating chamber (3) is fixedly connected to a drying chamber (5) on the side near the take-up roller (102). The drying chamber (5) is provided with a drying mechanism for drying plastic bags.

2. The plastic bag printing apparatus according to claim 1, wherein The rotating mechanism includes a first motor (104), which is fixedly connected inside the operating table (1). The output shaft of the first motor (104) is fixedly connected to a second synchronous pulley (105). The surface of the take-up roller (102) near the second synchronous pulley (105) is fixedly connected to a first synchronous pulley (103). The surfaces of the first synchronous pulley (103) and the second synchronous pulley (105) are fitted with the same first synchronous belt (106).

3. The plastic bag printing apparatus according to claim 1, wherein The adjustment mechanism includes a second motor (205), which is fixedly connected to the top of the operating chamber (3). The output shaft of the second motor (205) is fixedly connected to a fourth synchronous pulley (206). The ink roller (201) is fixedly connected to a third synchronous pulley (204) at one end of the fourth synchronous pulley (206). The third synchronous pulley (204) and the fourth synchronous pulley (206) are fitted with the same second synchronous belt (207). The ink cartridge (2) is provided with a feed pipe (208) on the side of the ink cartridge (2) near the third synchronous pulley (204).

4. The plastic bag printing apparatus according to claim 3, wherein The printing sleeve (202) is fitted with a scraper (209). A plurality of support columns (210) are slidably connected to the side of the scraper (209) away from the printing sleeve (202). The other end of each of the support columns (210) is fixedly connected to the inside of the ink cartridge (2). A spring (211) is fitted on the surface of each of the support columns (210). One end of each of the springs (211) is fixedly connected to the inside of the ink cartridge (2), and the other end of each of the springs (211) is fixedly connected to the side of the scraper (209).

5. The plastic bag printing apparatus according to claim 1, wherein The rotating mechanism includes a fifth synchronous wheel (213), which is fixedly connected to one end of the printing sleeve (202). The ends of the two stirring rollers (212) near the fifth synchronous wheel (213) are fixedly connected to a sixth synchronous wheel (214). The same third synchronous belt (215) is sleeved on the surfaces of the two stirring rollers (212) and the fifth synchronous wheel (213).

6. The plastic bag printing apparatus according to claim 1, wherein The constraint mechanism includes a chute (302) which is located on one side of the operating chamber (3). A U-shaped frame (401) is slidably connected inside the chute (302). The tension roller (4) is rotatably connected to the bottom of the U-shaped frame (401). Two limiting rods (402) are fixedly connected inside the chute (302). The U-shaped frame (401) is slidably sleeved on the surface of the two limiting rods (402). A tension spring (403) is sleeved on the surface of each of the two limiting rods (402). The top ends of the two tension springs (403) are fixedly connected to the bottom of the U-shaped frame (401), and the bottom ends of the two tension springs (403) are fixedly connected to the inner surface of the chute (302).

7. The plastic bag printing apparatus according to claim 1, wherein The drying mechanism includes multiple air vents (501), all of which are located at the bottom of the drying chamber (5). A heating tube (502) is installed inside each air vent (501), and a fan (503) is installed on top of each heating tube (502). A filter plate (504) is installed on top of each fan (503). The heating tube (502), fan (503), and filter plate (504) are all fixedly connected inside the drying chamber (5).

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