A limiting frame for a packaging and decoration printing press

Abstract

The present invention discloses a limit frame for a packaging and decoration printing machine, which relates to the technical field of packaging and printing, including a limit frame, wherein the interior of the limit frame is fixedly connected with a pressure plate and a flatness processing mechanism, wherein the flatness processing mechanism is arranged on the upper surface of the limit frame, and the flatness processing mechanism includes four support stands connected to the four sides of the upper surface of the limit frame, the top ends of the four support stands are fixedly connected with a connecting cross, the middle part of the connecting cross is fixedly connected with a motor, the output shaft of the motor is fixedly connected with an active bevel gear, the upper ends of the four support stands are respectively rotatably connected with two first screws and two second screws, and the ends of the two first screws and the two second screws close to each other are fixedly connected with a passive bevel gear, so as to solve the problem that the entire limit operation process becomes cumbersome and complicated, which increases the risk of operator error.

Description

Technical Field

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

[0002] The packaging limit frame for a printing press is a mechanical component installed in the feeding or conveying part of the equipment. It is mainly used to fix and calibrate the position of printing materials such as paper and film to ensure that the printing materials remain accurately aligned during the printing process and prevent deviation, thereby avoiding printing defects caused by inaccurate color registration and pattern misalignment.

[0003] During the printing process, when positioning the printed material, the material needs to be placed in a limit frame to define the position of the printed material. However, when processing thin-film printed materials, due to their light, soft texture and certain adhesion properties, wrinkles and bubbles are easily generated when placed in the limit frame. When using existing limit frames, wrinkles and bubbles are usually eliminated by manually flattening the surface of the printed material. However, the steps of eliminating wrinkles and bubbles are separated from the steps of fixing the material, making the entire limit operation process cumbersome and complicated, increasing the risk of operator error, and potentially causing printing defects such as inaccurate color registration and pattern misalignment. Summary of the Invention

[0004] In view of 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 complicated, which increases the risk of operator error.

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

[0006] The top of the four supporting frames is fixedly connected to the connecting cross of the four supporting frames, and the middle part of the four supporting frames is fixedly connected to the connecting cross of the four supporting frames.

[0007] Furthermore, the thread directions of the first screw and the second screw are opposite, the active bevel gear is meshed with the four passive bevel gears, and passive elimination plates are inserted into the interiors of both ends of the active elimination plate. The two first screws and the two second screws are arranged in a cross shape with respect to each other, and are arranged in a straight line with respect to the corresponding first screw and second screw, and the ends of each two adjacent passive elimination plates close to each other are fixedly connected.

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

[0009] Furthermore, a printing auxiliary mechanism is provided below the pressure plate, and the printing auxiliary mechanism includes a central exhaust plate fixedly connected to the central part of the pressure plate, and a plurality of exhaust holes are provided on the surface of the central exhaust plate.

[0010] Furthermore, a cover is fixedly connected to the lower surface of the middle exhaust plate, the side of the cover is connected to an air pipe, the side of the cover is fixedly connected to a support mounting plate, the lower surface of the support mounting plate is fixedly connected to a fan, and the air outlet of the fan is connected to the air pipe.

[0011] Furthermore, a plurality of middle pillars are fixedly connected to the interior of the mask, and the plurality of middle pillars are inserted into the interior of the exhaust hole, and sponge sleeves are fixedly provided on the surfaces of the plurality of middle pillars.

[0012] Furthermore, a ventilation hole is provided on a side of the cover away from the fan.

[0013] Furthermore, two elastic sheets are fixedly connected to the top of the vent on the cover, and a windshield is fixedly connected between the two elastic sheets.

[0014] Furthermore, both sides of the lower end of the windshield are fixedly connected with windshield strips, and the lower ends of the two windshield strips are fixedly connected with a plurality of reset strips.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] (1) This solution uses the synergistic effect of four sets of active and passive elimination plates to apply a tensile force to the printed material in all directions, effectively flattening the surface of the printed material and eliminating wrinkles and bubbles. At the same time, with the help of the downward pressure provided by the active and passive elimination plates and the downward pressure provided by the downward spring, the printed material is firmly clamped and positioned, simplifying the operation process and reducing the complexity of the operation. This not only reduces the risk of operator error, but also significantly improves the accuracy and efficiency of the printing operation, thereby improving the quality of the printed product.

[0017] (2) This solution can remove the air inside the mask through the fan, and then absorb the bubbles near the middle area of ​​the printed material into the mask, thereby improving the flatness of the printed material and further improving the printing quality.

[0018] (3) This solution provides support for the printed material through the support of the central pillar and the sponge cover, effectively improving the flatness of the printed material during the laying process. At the same time, the sponge cover is breathable, allowing bubbles to pass through smoothly and be sucked into the mask, thereby further improving the overall printing quality.

[0019] (4) After the bubbles are eliminated, when the printing mold is pressed onto the printing material for printing, the fan injects air into the mask. The airflow can make the printing material fit more tightly and flatly on the surface of the printing mold, thereby enhancing the contact uniformity between the printing material and the mold, improving the stability of the printing quality, reducing the printing defects caused by poor fitting, and further improving the printing quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural schematic diagram of the present invention;

[0021] Figure 2 Schematic diagram of the structure of the first screw and the second screw of the present invention;

[0022] Figure 3 This is a structural diagram of the accommodating plate and the telescopic plate of the present invention;

[0023] Figure 4 It is a schematic structural diagram of the passive cancellation plate and the active cancellation plate of the present invention;

[0024] Figure 5 Schematic diagram of the structure of the mask part of the present invention;

[0025] Figure 6 For the present invention Figure 5 Enlarged view of point A in the middle;

[0026] Figure 7 It is a structural schematic diagram of the sponge cover and the middle support of the present invention.

[0027] Description of the numbers in the figure:

[0028] 1. Limit frame;

[0029] 201. Support frame; 202. Connecting cross; 203. Motor; 204. Active bevel gear; 205. Passive bevel gear; 206. Pressure plate; 207. Accommodating plate; 208. Telescopic plate; 209. Downward pressure spring; 210. First screw; 211. Second screw; 212. Guide cross; 213. Passive elimination plate; 214. Active elimination plate;

[0030] 301. Central exhaust plate; 302. Sponge cover; 303. Shield; 304. Support mounting plate; 305. Fan; 306. Air pipe; 307. Central support; 308. Elastic sheet; 309. Wind shield; 310. Wind shield strip; 311. Reset strip. DETAILED DESCRIPTION

[0031] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0032] See also Figures 1-4, a limit frame of a packaging and decoration printing machine includes a limit frame 1, the interior of the limit frame 1 is fixedly connected to a pressure plate 206, a flatness processing mechanism, the flatness processing mechanism is arranged on the upper surface of the limit frame 1, and the flatness processing mechanism includes four support frames 201 on the four sides of the upper surface of the limit frame 1, the tops of the four support frames 201 are fixedly connected to a connecting cross 202, the middle part of the connecting cross 202 is fixedly connected to a motor 203, and the motor 203 can be used as a power source to drive the active bevel gear 204 to rotate, the output shaft of the motor 203 is fixedly connected to the active bevel gear 204, and the upper ends of the four support frames 201 are rotatably connected to two first screws 210 and two second screws 211, and the two The first screw 210 and the two second screws 211 are fixedly connected at one end close to each other with a passive bevel gear 205, and the surfaces of the two first screws 210 and the two second screws 211 are threadedly sleeved with a receiving plate 207, and the interiors of the four receiving plates 207 are slidably inserted with a telescopic plate 208, and the bottom end of the telescopic plate 208 is fixedly connected with an active elimination plate 214, and a downward pressure spring 209 is provided 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 interior of the receiving plate 207, and the active elimination plate 214 and the passive elimination plate 213 can be pushed downward by the downward pressure spring 209 to press the printing material, thereby fixing the printing material and improving the effect of eliminating wrinkles and bubbles.

[0033] Among them, the thread directions of the first screw 210 and the second screw 211 are opposite. When the corresponding two first screws 210 and the two second screws 211 rotate, they can drive the four active elimination plates 214 to move away from each other. 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 active elimination plates 214 and the passive elimination plates 213 can apply a pulling force in all directions to the printed material to eliminate wrinkles and bubbles. The two first screws 210 and the two second screws 211 are arranged in a cross shape with respect to each other, and are arranged in a straight line between the corresponding first screws 210 and the second screws 211. The ends of each adjacent two passive elimination plates 213 that are close to each other are fixedly connected. When the active elimination plate 214 moves, the passive elimination plate 213 can be pulled out from 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 effect of eliminating wrinkles and bubbles.

[0034] Among them, a guide cross 212 is fixedly connected between the four supporting stands 201. The guide cross 212 can prevent the active elimination plate 214 and the passive elimination plate 213 from tilting when moving, thereby avoiding the situation where one side of the printed material is under excessive pressure and damaged. The four ends of the guide cross 212 are respectively fixedly connected to the upper ends of the four supporting stands 201, and the four ends of the guide cross 212 are respectively inserted into the inner parts of the upper ends of the four accommodating plates 207.

[0035] By adopting the above technical solution, when printing on film-type printing materials, the active elimination plate 214 and the passive elimination plate 213 are lifted up, and the film-type printing materials are laid on the pressure plate 206, and then the active elimination plate 214 is loosened, and the active elimination plate 214 and the passive elimination plate 213 can be pushed downward by the downward pressure spring 209 to press the printing materials, and then the active bevel gear 204 is driven to rotate by the motor 203, and the four passive bevel gears 205 are driven to rotate synchronously, so that the two first screws 210 and the two second screws 211 are rotated. The thread directions of the first screw 210 and the second screw 211 are opposite, so when the corresponding two first screws 210 and the two second screws 211 rotate, they can drive the four active elimination plates 214 to move away from each other, and apply a pulling force in all directions to the printed material, so as to flatten the printed material and eliminate wrinkles and bubbles. In addition, the downward thrust provided by the active elimination plate 214, the passive elimination plate 213 and the downward pressure spring 209 can fix the printed material, reduce the complexity of the operation process, and thereby reduce the risk of operator error and improve printing quality.

[0036] like Figure 5-Figure 7 As 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 of the pressure plate 206, and a plurality of exhaust holes are provided on the surface of the middle exhaust plate 301, and a mask 303 is fixedly connected to the lower surface of the middle exhaust plate 301, and the side of the mask 303 is connected to an air supply pipe 306, and the side of the mask 303 is fixedly connected to a support mounting plate 304, and the lower surface of the support mounting plate 304 is fixedly connected to a fan 305, and the air bubbles remaining on the printing material closer to the middle can be sucked into the mask 303 through the fan 305.

[0037] Among them, the air outlet of the fan 305 is connected to the air supply pipe 306, and the interior of the mask 303 is fixedly connected with multiple middle pillars 307, and the multiple middle pillars 307 are inserted into the interior of the exhaust hole. The surfaces of the multiple middle pillars 307 are fixedly covered with sponge covers 302. The middle pillars 307 and the sponge covers 302 can support the printing material, improve the flatness of the laying of the printing material, and do not affect the elimination of bubbles. A ventilation hole is opened on the side of the mask 303 away from the fan 305.

[0038] 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, allowing 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 long, the reset strips 311 will not fall away 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 again at the vents through the guidance of the reset strips 311, thereby maintaining the sealing of the mask 303.

[0039] By adopting the above technical solution, when the printing material is used for printing, since the active elimination plate 214 and the passive elimination plate 213 form a square frame, the part in the middle cannot be directly subjected to force. When facing thin film printing materials with high viscosity, bubbles may still remain in the middle of the printing material. Therefore, the air in the mask 303 is sucked out by the fan 305, and the bubbles on the printing material closer to the middle can be sucked into the mask 303. After the bubbles in the mask 303 are sucked away, the suction force in the mask 303 is too great to suck open the wind shield 309, allowing external air to enter the mask 303, so as to avoid the situation where the printing material is damaged due to excessive suction. The printing material can be supported by the middle pillar 307 and the sponge sleeve 302, so as to improve the flatness of the printing material when it is laid, and the bubbles can be sucked into the mask 303 through the sponge sleeve 302, further improving the printing quality.

[0040] After the bubbles are eliminated, when the printing mold is pressed on the printing material for printing, the fan 305 blows air into the inside of the mask 303. The inflow of air can make the printing material fit more smoothly on the surface of the printing mold, thereby improving the printing quality, reducing printing defects, and further improving the printing quality.

[0041] Instructions for use: First, lift the active cancellation plate 214 and the passive cancellation plate 213, and lay the film-like printing material on the pressure plate 206. Then release the active cancellation plate 214, and push the active cancellation plate 214 and the passive cancellation plate 213 to press the printing material by pressing the spring 209 downward.

[0042] Next, the motor 203 provides power, and the active bevel gear 204 and the passive bevel gear 205 rotate, and the first screw 210 cooperates with the two second screws 211 to drive the active elimination plate 214 and the passive elimination plate 213 to flatten the printed material and eliminate wrinkles and bubbles;

[0043] Next, the air in the mask 303 is sucked out by the fan 305, and the air bubbles on the printed material closer to the middle are sucked into the mask 303;

[0044] Then, the printing mold is pressed onto the printing material to print;

[0045] Finally, the fan 305 blows air into the interior of the mask 303, and the inflow of air causes the printing material to adhere to the surface of the printing mold.

[0046] The above description is merely a preferred embodiment of the present invention; however, the scope of protection of the present invention is not limited thereto. Any person skilled in the art who, within the technical scope disclosed by the present invention, makes equivalent substitutions or modifications based on the technical solutions and improved concepts of the present invention shall be covered by the scope of protection 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), and characterized in that: The packaging and decoration printing machine limit frame also includes a flatness processing mechanism, which is arranged on the upper surface of the limit frame (1). The flatness processing mechanism includes four support frames (201) located at four sides of the upper surface of the limit frame (1). The tops of the four support 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 support frames (201) are rotatably connected to two first screws (210) and two second screws (211), and the two The first screw rod (210) and the two second screw rods (211) are fixedly connected to the ends close to each other with a passive bevel gear (205), the surfaces of the two first screw rods (210) and the two second screw rods (211) are threadedly sleeved with a receiving plate (207), the interiors of the four receiving plates (207) are slidably inserted with a telescopic plate (208), the bottom ends of the telescopic plates (208) are fixedly connected to an active elimination plate (214), the interior of the receiving plate (207) is provided with a downward pressure spring (209), and the upper and lower ends of the downward pressure spring (209) are respectively fixedly connected to the interior of the receiving plate (207) and the top end of the telescopic plate (208); The packaging and decoration printing machine limit frame also includes a printing auxiliary mechanism, which includes a central exhaust plate (301) fixedly connected to the central part of the pressure plate (206), a plurality of exhaust holes are provided on the surface of the central exhaust plate (301), a mask (303) is fixedly connected to the lower surface of the central 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), an air outlet of the fan (305) is connected to the air supply pipe (306), a plurality of central pillars (307) are fixedly connected to the inside of the mask (303), a plurality of the central pillars (307) are inserted into the inside of the exhaust holes, and a sponge cover (302) is fixedly provided on the surface of the plurality of the central pillars (307); The thread directions of the first screw (210) and the second screw (211) are opposite, the active bevel gear (204) is meshed with the four passive bevel gears (205), and passive elimination plates (213) are inserted into the interiors of both ends of the active elimination plate (214). The two first screws (210) and the two second screws (211) are arranged in a cross shape, and the first screws (210) and the second screws (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; A ventilation opening is provided on a side of the cover (303) away from the fan (305); 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); 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 strips (311).

2. The limiting frame of a packaging and decoration printing press 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).

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