Limiting frame of packaging decoration printing machine

Abstract

The invention discloses a packaging decoration printing machine limiting frame, and relates to the technical field of packaging printing, the packaging decoration printing machine limiting frame comprises a limiting frame body, a bearing plate and a flatness processing mechanism are fixedly connected in the limiting frame body, and the flatness processing mechanism is arranged on the upper surface of the limiting frame body; the flatness processing mechanism comprises four supporting vertical frames on the four edges of the upper surface of the limiting frame, the top ends of the four supporting vertical frames are fixedly connected with a connecting cross, the middle of the connecting cross is fixedly connected with a motor, and an output shaft of the motor is fixedly connected with a driving bevel gear. The upper ends of the four supporting vertical frames are rotationally connected with two first screws and two second screws correspondingly, and the ends, close to each other, of the two first screws and the ends, close to each other, of the two second screws are fixedly connected with driven bevel gears correspondingly, so that the problems that the whole limiting operation process becomes tedious and complex, and the error risk of operators is increased are solved.

Description

Technical Field

[0001] The present invention relates to the technical field of packaging printing, and more specifically, to a limit frame for a packaging and decoration printing machine. Background Art

[0002] The packaging limit frame for a printing machine is a mechanical component installed at the feeding or conveying part of the equipment, mainly used to fix and calibrate the positions of printing materials such as paper and film, ensure that the printing materials maintain precise alignment during the printing process, prevent deviation, and thus avoid printing defects caused by inaccurate color registration and pattern misalignment.

[0003] During the printing operation, when positioning and printing the printing material, the material needs to be placed in the limit frame to limit its position. However, when dealing with film-like printing materials, due to their thin, light, and soft texture and certain adhesion characteristics, wrinkles and bubbles are easily generated when placed in the limit frame. When the existing limit frame is in use, the method of manually flattening on the surface of the printing material is usually adopted to eliminate wrinkles and bubbles. However, the steps of eliminating wrinkles and bubbles are separated from the steps of fixing the material, resulting in a cumbersome and complex entire limit operation process, increasing the risk of errors for the operating workers, and thus may cause printing defects such as inaccurate printing color registration and pattern misalignment. Summary of the Invention

[0004] Aiming at the problems existing in the prior art, the purpose of the present invention is to provide a limit frame for a packaging and decoration printing machine to solve the problem that the entire limit operation process becomes cumbersome and complex, increasing the risk of errors for the operating workers.

[0005] To solve the above problems, the present invention adopts the following technical solutions.

[0006] A limit frame for a packaging and decoration printing machine includes a limit frame. A bearing plate and a flatness treatment mechanism are fixedly connected inside the limit frame. The flatness treatment mechanism is arranged on the upper surface of the limit frame. The flatness treatment mechanism includes four support stands at the four sides of the upper surface of the limit frame. A connecting cross is fixedly connected to the tops of the four support stands. A motor is fixedly connected to the middle of the connecting cross. A driving bevel gear is fixedly connected to the output shaft of the motor. Two first screws and two second screws are respectively rotatably connected to the upper ends of the four support stands. Passive bevel gears are fixedly connected to the ends of the two first screws and the two second screws that are close to each other. Accommodating plates are threadedly sleeved on the surfaces of the two first screws and the two second screws. Telescopic plates are slidably inserted into the interiors of the four accommodating plates. A driving elimination plate is fixedly connected to the bottom end of the telescopic plate. A downward pressure spring is arranged inside the accommodating plate. The upper and lower ends of the downward pressure spring are respectively fixedly connected to the top end of the telescopic plate and the interior of the accommodating plate.

[0007] Further, the thread directions of the first screw rod and the second screw rod are opposite, the driving bevel gear meshes with the four driven bevel gears, the inner parts at both ends of the driving elimination plate are both inserted with driven elimination plates, the two first screw rods and the two second screw rods are arranged in a cross shape with respect to each other, and are arranged in a straight line corresponding to the first screw rod and the second screw rod, and the mutually approaching ends of every two adjacent driven elimination plates are fixedly connected to each other.

[0008] Further, a guiding cross is fixedly connected between the four supporting upright frames, the four ends of the guiding cross are respectively fixedly connected to the upper ends of the four supporting upright frames, and the four ends of the guiding cross are respectively inserted into the inner parts of the upper ends of the four accommodating plates.

[0009] Further, a printing auxiliary mechanism, the printing auxiliary mechanism is arranged below the pressing plate, and the printing auxiliary mechanism includes a middle exhaust plate fixedly connected to the middle of the pressing plate, and a plurality of exhaust holes are formed in the surface of the middle exhaust plate.

[0010] Further, a mask is fixedly connected to the lower surface of the middle exhaust plate, an air delivery pipe is communicated with the side surface of the mask, a supporting mounting plate is fixedly connected to the side surface of the mask, a blower is fixedly connected to the lower surface of the supporting mounting plate, and the air outlet of the blower is communicated with the air delivery pipe.

[0011] Further, a plurality of middle support columns are fixedly connected to the inside of the mask, the plurality of middle support columns are respectively inserted into the inside of the exhaust holes, and sponge sleeves are fixedly sleeved on the surfaces of the plurality of middle support columns.

[0012] Further, a ventilation opening is formed in the side of the mask away from the blower.

[0013] Further, two elastic sheets are fixedly connected to the inside of the top end of the ventilation opening on the mask, and a wind blocking plate is fixedly connected between the two elastic sheets.

[0014] Further, wind blocking strips are fixedly connected to both sides of the lower end of the wind blocking plate, and a plurality of reset strips are fixedly connected to the lower ends of the two wind blocking strips.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: (1) Through the synergistic effect of the four groups of driving elimination plates and driven elimination plates, a tensile force is applied to the printing material in all directions, effectively flattening the surface of the printing material, so as to achieve the purpose of eliminating wrinkles and bubbles. At the same time, with the assistance of the driving elimination plate and the driven elimination plate and the downward pressure provided by the compression spring, the stable clamping and positioning of the printing material are realized, the operation process is simplified, and the operation complexity is reduced. It not only reduces the risk of misoperation of the operating workers, but also significantly improves the accuracy and efficiency of the printing operation, and further improves the quality of the printed matter.

[0016] (2) In this solution, the air inside the mask can be exhausted through the fan, and then the air bubbles near the middle area of the printing material are sucked into the mask, so as to improve the flatness of the printing material and further enhance the printing quality.

[0017] (3) In this solution, through the supporting effect of the middle pillar and the sponge sleeve, a supporting force is provided for the printing material, effectively improving the flatness of the printing material during the laying process. At the same time, the sponge sleeve has air permeability, enabling the air bubbles to pass through smoothly and be sucked into the mask interior, thereby further enhancing the overall printing quality.

[0018] (4) After the air bubbles are eliminated, when the printing die is pressed onto the printing material for printing operations, the fan injects air into the mask interior. The air flow can prompt the printing material to fit more closely and flatly onto the surface of the printing die, enhancing the contact uniformity between the printing material and the die, improving the stability of the printing quality, reducing printing defects caused by poor fitting, and further improving the printing quality. Description of the Drawings

[0019] Figure 1 is the structural schematic diagram of the present invention; Figure 2 is the structural schematic diagram of the first screw and the second screw of the present invention; Figure 3 is the structural schematic diagram of the receiving plate and the telescopic plate of the present invention; Figure 4 is the structural schematic diagram of the passive elimination plate and the active elimination plate of the present invention; Figure 5 is the structural schematic diagram of the mask part of the present invention; Figure 6 of the present invention Figure 5 is the enlarged view at A in; Figure 7 is the structural schematic diagram of the sponge sleeve and the middle pillar of the present invention.

[0020] Explanation of the reference numerals in the drawings: 1. Limit frame; 201. Support vertical frame; 202. Connecting cross; 203. Motor; 204. Active bevel gear; 205. Passive bevel gear; 206. Bearing plate; 207. Receiving plate; 208. Telescopic plate; 209. Compression spring; 210. First screw; 211. Second screw; 212. Guide cross; 213. Passive elimination plate; 214. Active elimination plate; 301, Middle exhaust plate; 302, Sponge sleeve; 303, Mask; 304, Support mounting plate; 305, Fan; 306, Air delivery pipe; 307, Middle support; 308, Elastic sheet; 309, Windshield; 310, Windstrip; 311, Reset strip. Detailed implementation mode

[0021] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0022] Please refer to Figures 1-4 , A limiting frame of a packaging and decoration printing machine, including a limiting frame 1, an internal fixed connection of the limiting frame 1 with a bearing plate 206, a flatness processing mechanism, the flatness processing mechanism is arranged on the upper surface of the limiting frame 1, the flatness processing mechanism includes four support uprights 201 at the four sides of the upper surface of the limiting frame 1, the tops of the four support uprights 201 are fixedly connected with a connecting cross 202, the middle of the connecting cross 202 is fixedly connected with a motor 203, the motor 203 can be used as a power source to drive the driving bevel gear 204 to rotate, the output shaft of the motor 203 is fixedly connected with the driving bevel gear 204, the upper ends of the four support uprights 201 are respectively rotatably connected with two first lead screws 210 and two second lead screws 211, one end of the two first lead screws 210 and the two second lead screws 211 close to each other are fixedly connected with a driven bevel gear 205, the surfaces of the two first lead screws 210 and the two second lead screws 211 are all thread sleeved with a receiving plate 207, the inside of the four receiving plates 207 are all slidably inserted with a telescopic plate 208, the bottom end of the telescopic plate 208 is fixedly connected with a driving elimination plate 214, a pressing spring 209 is arranged inside the receiving plate 207, the upper and lower ends of the pressing spring 209 are respectively fixedly connected with the top end of the telescopic plate 208 and the inside of the receiving plate 207, the driving elimination plate 214 and the driven elimination plate 213 can be pushed down by the pressing spring 209 to press the printing material, so as to fix the printing material and improve the elimination effect of wrinkles and bubbles.

[0023] Among them, the thread directions of the first screw rod 210 and the second screw rod 211 are opposite. When the corresponding two first screw rods 210 and the two second screw rods 211 rotate, they can drive the four active elimination plates 214 to move away from each other. The active bevel gear 204 meshes with the four passive bevel gears 205. Passive elimination plates 213 are inserted into the interiors of both ends of the active elimination plate 214. The active elimination plate 214 and the passive elimination plate 213 can apply a pulling force to the printing material in all directions to eliminate wrinkles and bubbles. The two first screw rods 210 and the two second screw rods 211 are arranged in a cross shape with respect to each other, and the corresponding first screw rod 210 and the second screw rod 211 are arranged in a straight line. The mutually approaching ends of every two adjacent passive elimination plates 213 are fixedly connected. When the active elimination plate 214 moves, the passive elimination plate 213 can be pulled out of the active elimination plate 214, so that the active elimination plate 214 and the passive elimination plate 213 always form a square to maintain the elimination effect on wrinkles and bubbles.

[0024] Among them, a guiding cross 212 is fixedly connected between the four supporting stands 201. The guiding cross 212 can prevent the active elimination plate 214 and the passive elimination plate 213 from tilting when moving, thereby avoiding the situation that one side of the printing material is over-pressed and damaged. The four ends of the guiding cross 212 are respectively fixedly connected to the upper ends of the four supporting stands 201, and the four ends of the guiding cross 212 are respectively inserted into the interiors of the upper ends of the four receiving plates 207.

[0025] By adopting the above technical solution, when printing a film-like printing material, the active elimination plate 214 and the passive elimination plate 213 are lifted, and the film-like printing material is laid on the bearing plate 206. Then, the active elimination plate 214 is released, and the active elimination plate 214 and the passive elimination plate 213 can be pushed downward by the pressing spring 209 to press the printing material. Then, the motor 203 drives the active bevel gear 204 to rotate, and synchronously drives the four passive bevel gears 205 to rotate, so that the two first screw rods 210 and the two second screw rods 211 rotate. Since the thread directions of the first screw rod 210 and the second screw rod 211 are opposite, when the corresponding two first screw rods 210 and the two second screw rods 211 rotate, they can drive the four active elimination plates 214 to move away from each other, and thus can apply a pulling force to the printing material in all directions to flatten the printing material, eliminate wrinkles and bubbles. Moreover, through the downward pressing thrust provided by the active elimination plate 214, the passive elimination plate 213 and the pressing spring 209, the fixation of the printing material can be realized, the complexity of the operation process can be reduced, and further the error risk of the operating worker can be reduced, and the printing quality can be improved.

[0026] Such as Figures 5-7As shown, a printing auxiliary mechanism is arranged below the pressure plate 206, and the printing auxiliary mechanism includes a middle exhaust plate 301 fixedly connected to the middle part of the pressure plate 206, a plurality of exhaust holes are provided on the surface of the middle exhaust plate 301, a mask 303 is fixedly connected to the lower surface of the middle exhaust plate 301, a side of the mask 303 is connected to an air supply pipe 306, a side of the mask 303 is fixedly connected to a support mounting plate 304, a lower surface of the support mounting plate 304 is fixedly connected to a fan 305, and the fan 305 can be used to absorb the bubbles remaining on the printing material closer to the middle into the mask 303.

[0027] Among them, the air outlet of the fan 305 is connected to the air supply pipe 306, and a plurality of middle pillars 307 are fixedly connected to the inside of the mask 303. The plurality of middle pillars 307 are inserted into the inside of the exhaust hole, and the surfaces of the plurality of middle pillars 307 are fixedly covered with sponge covers 302. The printing materials can be supported by the middle pillars 307 and the sponge covers 302, so that the flatness of the laying of the printing materials is improved without affecting the elimination of bubbles. A ventilation hole is opened on the side of the mask 303 away from the fan 305.

[0028] Among them, two elastic sheets 308 are fixedly connected to the top of the vent on the cover 303, and a windshield 309 is fixedly connected between the two elastic sheets 308. If the suction force is too large, the windshield 309 will be sucked open to allow external air to enter the cover 303 to avoid the situation where the printing material is damaged due to excessive suction. The lower ends of the windshield 309 are fixedly connected to windshield strips 310 on both sides. The two windshield strips 310 are clamped at the vent to maintain the sealing of the cover 303. The lower ends of the two windshield strips 310 are fixed. A plurality of reset strips 311 are connected. When the wind shield 309 is opened due to air flow, the reset strips 311 will move upward. Since the reset strips 311 are relatively long, the reset strips 311 will not separate from the vents, and air can enter the mask 303 through the reset strips 311. When the air stops flowing, the elastic sheet 308 drives the wind shield 309 to block the vents again, and the two wind shield strips 310 are clamped at the vents again through the guidance of the reset strips 311, so as to maintain the sealing of the mask 303.

[0029] By adopting the above technical solution, when printing on printing materials, since a square frame is formed between the active elimination plate 214 and the passive elimination plate 213, the middle part cannot be directly stressed. When facing film-like printing materials with high viscosity, air bubbles may still remain in the middle of the printing materials. Therefore, by using the air blower 305 to suck out the air in the mask 303, the air bubbles on the printing materials closer to the middle can be sucked into the mask 303. And after the air bubbles in the mask 303 are sucked away, the excessive suction in the mask 303 will suck open the wind deflector 309, allowing external air to enter the mask 303, so as to avoid the situation where the printing materials are damaged due to excessive suction. The middle support column 307 and the sponge sleeve 302 can support the printing materials to improve the flatness when laying the printing materials, and the air bubbles can be sucked into the mask 303 through the sponge sleeve 302 to further improve the printing quality.

[0030] After the elimination of air bubbles, when pressing the printing die on the printing materials for printing, the air blower 305 blows air into the interior of the mask 303. The inflow of air can make the printing materials fit more flatly on the surface of the printing die, thereby improving the printing quality, reducing printing defects, and further enhancing the printing quality.

[0031] Usage method: First, lift the active elimination plate 214 and the passive elimination plate 213, lay the film-like printing materials on the bearing plate 206, and then release the active elimination plate 214. By pressing down the spring 209, the active elimination plate 214 and the passive elimination plate 213 are pushed to press the printing materials. Next, power is provided by the motor 203, and through the cooperation of the active bevel gear 204, the passive bevel gear 205 rotation, the first screw 210 and the two second screws 211, the active elimination plate 214 and the passive elimination plate 213 are driven to flatten the printing materials, eliminating wrinkles and air bubbles. Next, the air blower 305 sucks out the air in the mask 303, sucking the air bubbles on the printing materials closer to the middle into the mask 303. Then, press the printing die on the printing materials for printing. Finally, the air blower 305 blows air into the interior of the mask 303, and the inflow of air makes the printing materials fit on the surface of the printing die.

[0032] The above is only the preferred specific implementation manner of the present invention; however, the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution of the present invention and its improved concept, makes equivalent substitutions or changes, and should be covered within the protection scope of the present invention.

Claims

1. A limit frame for a packaging and decoration printing machine, comprising a limit frame (1), wherein a pressure plate (206) is fixedly connected to the interior of the limit frame (1), characterized in that: A flatness processing mechanism, the flatness processing mechanism is arranged on the upper surface of the limiting frame (1), the flatness processing mechanism comprises four supporting frames (201) connected to the four sides of the upper surface of the limiting frame (1), the tops of the four supporting frames (201) are fixedly connected to a connecting cross (202), the middle of the connecting cross (202) is fixedly connected to a motor (203), the output shaft of the motor (203) is fixedly connected to a driving bevel gear (204), the upper ends of the four supporting frames (201) are respectively rotatably connected to two first screws (210) and two second screws (211), the two first screws (2 10) A passive bevel gear (205) is fixedly connected to one end of the two second screw rods (211) that is close to each other, and a receiving plate (207) is threadedly sleeved on the surface of the two first screw rods (210) and the two second screw rods (211), and a telescopic plate (208) is slidably inserted inside the four receiving plates (207), and an active elimination plate (214) is fixedly connected to the bottom end of the telescopic plate (208), and a downward pressure spring (209) is arranged inside the receiving plate (207), and the upper and lower ends of the downward pressure spring (209) are respectively fixedly connected to the top of the telescopic plate (208) and the inside of the receiving plate (207).

2. A limit frame for a packaging and decoration printing machine according to claim 1, characterized in that: The thread directions of the first screw rod (210) and the second screw rod (211) are opposite, the active bevel gear (204) is meshed with the four passive bevel gears (205), passive elimination plates (213) are inserted into the interior of both ends of the active elimination plate (214), the two first screw rods (210) and the two second screw rods (211) are arranged in a cross shape with respect to each other, and the corresponding first screw rods (210) and the second screw rods (211) are arranged in a straight line, and the ends of each two adjacent passive elimination plates (213) close to each other are fixedly connected.

3. A limit frame for a packaging and decoration printing machine according to claim 1, characterized in that: A guide cross (212) is fixedly connected between the four support frames (201), and the four ends of the guide cross (212) are respectively fixedly connected to the upper ends of the four support frames (201), and the four ends of the guide cross (212) are respectively inserted into the interior of the upper ends of the four accommodating plates (207).

4. A limiting frame for a packaging and decoration printing machine according to claim 1, characterized in that: A printing auxiliary mechanism is arranged below the pressure plate (206), and comprises a middle exhaust plate (301) fixedly connected to the middle of the pressure plate (206), and a plurality of exhaust holes are provided on the surface of the middle exhaust plate (301).

5. A limiting frame for a packaging and decoration printing machine according to claim 4, characterized in that: The lower surface of the middle exhaust plate (301) is fixedly connected to a shield (303), the side of the shield (303) is connected to an air supply pipe (306), the side of the shield (303) is fixedly connected to a support mounting plate (304), the lower surface of the support mounting plate (304) is fixedly connected to a fan (305), and the air outlet of the fan (305) is connected to the air supply pipe (306).

6. A limit frame for a packaging and decoration printing machine according to claim 5, characterized in that: A plurality of middle pillars (307) are fixedly connected to the interior of the mask (303), the plurality of middle pillars (307) are inserted into the interior of the exhaust hole, and a sponge sleeve (302) is fixedly provided on the surface of the plurality of middle pillars (307).

7. The limiting frame of a packaging and decoration printing machine according to claim 5, characterized in that: A ventilation opening is provided on a side of the cover (303) away from the fan (305).

8. The limiting frame of a packaging and decoration printing machine according to claim 7, characterized in that: Two elastic sheets (308) are fixedly connected to the top of the ventilation opening on the cover (303), and a windshield (309) is fixedly connected between the two elastic sheets (308).

9. A limiting frame for a packaging and decoration printing machine according to claim 8, characterized in that: Both sides of the lower end of the windshield plate (309) are fixedly connected to windshield strips (310), and the lower ends of the two windshield strips (310) are fixedly connected to a plurality of reset loose strips (311).

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