Limiting mechanism of packaging decoration printing machine

Abstract

The utility model discloses a packaging decoration printing machine limiting mechanism in the technical field of packaging printing machines, which comprises a base, a printing machine body is fixedly connected to the right side of the top of the base, a sliding groove is formed in the top of the base and located on the right side of the printing machine body, and L-shaped plates are slidably connected to the front side and the rear side of the inner cavity wall of the sliding groove. The tail ends of the two L-shaped plates extend to the outer sides of the sliding grooves, and the tail ends of the two L-shaped plates penetrate through the printing machine body and extend to the outer side of the printing machine body. The packaging decoration printing machine limiting mechanism is reasonable in structural design, a packaging paperboard can be effectively limited in the printing process, and the printing efficiency is improved. And deviation of a printing position caused by deviation is avoided, so that the quality of a finished product is improved, printing ink on the surface of the printed packaging paperboard can be dried, the time for waiting for air drying is saved, and the next process is directly started, so that the production efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of packaging printing machines, in particular to a limiting mechanism of a packaging decoration printing machine. Background Art

[0002] Packaging decoration refers to the shape and surface design of the packaging, which is decorated and beautified on a scientific and reasonable basis so that the packaging's shape, pattern, color, text, trademark and other elements constitute an artistic whole, which plays the role of conveying product information, expressing product characteristics, promoting products, beautifying products, promoting sales and facilitating consumption. It is usually printed using a packaging decoration printing machine.

[0003] The existing packaging and decoration printing machine cannot effectively limit the packaging cardboard during use, which will cause the packaging cardboard to deviate during the printing and transportation process, resulting in deviation in the printing position, thereby reducing the quality of the finished product. After printing, the ink on the surface of the packaging cardboard has not completely dried, so it needs to be taken out and waited for complete drying before entering the subsequent process, which affects the subsequent process and reduces production efficiency. For this reason, we propose a limiting mechanism for a packaging and decoration printing machine. Utility Model Content

[0004] The utility model aims to provide a limiting mechanism for a packaging and decoration printing machine, so as to solve the problem mentioned in the above background technology that the existing packaging and decoration printing machine cannot effectively limit the packaging cardboard during use, which will cause the packaging cardboard to deviate during the printing and conveying process, resulting in deviation in the printing position, thereby reducing the quality of the finished product, and after printing, the ink on the surface of the packaging cardboard has not been completely dried, so it needs to be taken out and waited for complete drying before entering the subsequent process, which affects the progress of the subsequent process, thereby reducing the production efficiency.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a limiting mechanism for a packaging and decoration printing machine, comprising a base, a printing machine body is fixedly connected to the right side of the top of the base, a slide groove is opened on the top of the base and located on the right side of the printing machine body, L-shaped plates are slidably connected to the front and rear sides of the inner cavity wall of the slide groove, the ends of the two L-shaped plates extend to the outside of the slide groove, and the ends of the two L-shaped plates penetrate the printing machine body and extend to the outside of the printing machine body, the left and right sides of the top of the L-shaped plate are rotatably connected to the rotating rod, and the bottom end of the rotating rod extends to the L-shaped plate The outer side of the L-shaped plate is fixedly connected with a rotating roller, the top right side of the rear side L-shaped plate is fixedly connected with a conveying motor by bolts, the top of the rotating rod on the rear right side is fixedly connected with the output shaft of the conveying motor, the outer side walls of the rotating rollers on the left and right sides are drivingly connected with conveyor belts, the right side wall of the L-shaped plate is fixedly connected with a fixing plate, the top front and back sides of the base and the right side of the slide groove are provided with fixing holes, the fixing holes are evenly distributed from the inside to the outside, the top of the fixing plate is screwed with a fixing bolt, the bottom end of the fixing bolt extends to the inner cavity of the fixing hole and is screwed with the inner cavity wall of the fixing hole.

[0006] As a further description of the above technical solution:

[0007] A U-shaped frame is fixedly connected to the top of the base and located on the left and right sides of the printing machine body, the two U-shaped frames are located on the lower sides of the two L-shaped plates, a limit plate is slidably connected between the front and rear sides of the inner side walls of the U-shaped frame, a limit screw is threadedly connected to the middle of the top of the U-shaped frame, the bottom end of the limit screw extends to the inner side of the U-shaped frame and is connected to the top bearing of the limit plate, a pressure plate is fixedly connected to the middle of the bottom of the limit plate, and the two pressure plates are located between the inner side walls of the two conveyor belts.

[0008] As a further description of the above technical solution:

[0009] The outer side wall of the conveyor belt is evenly provided with rubber strips around one circumference.

[0010] As a further description of the above technical solution:

[0011] A vertical plate is fixedly connected to the left side of the middle of the top of the base, a drying slot block is fixedly connected to the upper side of the right wall of the vertical plate, a drying fan is fixedly connected to the upper side of the inner cavity wall of the drying slot block, and an electric heating wire is fixedly connected to the inner cavity wall of the drying slot block and located at the lower side of the drying fan.

[0012] As a further description of the above technical solution:

[0013] A traction groove is opened at the top of the base and on the right side of the vertical plate, and a traction screw is rotatably connected to the right side of the inner cavity wall of the traction groove through a bearing, a traction motor is fixedly connected to the upper side of the left side wall of the base through bolts, and the left end of the traction screw is fixedly connected to the output shaft of the traction motor, a movable groove block is screwed on the outer side wall of the traction screw, and the outer side wall of the movable groove block is slidably connected to the inner cavity wall of the traction groove, a micro air pump is fixedly connected to the upper side of the left side wall of the movable groove block, the micro air pump is connected to the movable groove block through a pipe, and a rubber pad is provided on the top of the movable groove block.

[0014] As a further description of the above technical solution:

[0015] The bottom of the drying tank block is fixedly connected with an air collecting cover.

[0016] Compared with the prior art, the beneficial effects of the utility model are:

[0017] 1. The limiting mechanism of the packaging and decoration printing machine adjusts the position of the L-shaped plate through fixing bolts, fixing holes and fixing plates in cooperation with sliding grooves, adjusts the relative distance between the two L-shaped plates according to the size of different packaging cardboards, drives the pressure plate to move through the limiting screw in cooperation with the limiting plate, and adjusts according to packaging cardboards of different thicknesses. The two conveyor belts convey the packaging cardboard through the conveying motor in cooperation with the rotating rod and the rotating roller, and at the same time cooperate with the two pressure plates to limit the packaging cardboard, which can effectively limit the packaging cardboard during the printing process to avoid deviation in the printing position caused by offset, thereby improving the quality of the finished product.

[0018] 2. The limiting mechanism of the packaging and decoration printing machine connects the packaging cardboard with the moving slot block through a micro vacuum pump and a moving slot block, drives the moving slot block to move to the left through a traction motor and a traction screw, and moves the packaging cardboard to the bottom of the drying slot block. The drawn air is heated by a drying fan and an electric heating wire, and then the hot air is blown to the packaging cardboard through a wind gathering hood to dry the ink on the surface of the packaging cardboard. The ink on the surface of the packaging cardboard after printing can be dried, thereby saving the time waiting for air drying and directly entering the next process, thereby improving production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a structural stereoscopic diagram of a limiting mechanism for a packaging and decoration printing machine proposed by the utility model;

[0020] Figure 2 This is a schematic diagram of the front and cross-sectional view of the structure of a limiting mechanism for a packaging and decoration printing machine proposed by the utility model;

[0021] Figure 3This is a top view schematic diagram of a structural L-shaped plate of a limiting mechanism for a packaging and decoration printing machine proposed by the utility model;

[0022] Figure 4 The utility model provides a packaging and decoration printing machine limit mechanism Figure 2 Enlarged structural diagram at A in the middle.

[0023] In the figure: 100, base; 110, printing machine body; 111, slide; 112, L-shaped plate; 113, rotating rod; 114, rotating roller; 115, conveying motor; 116, conveyor belt; 117, fixing plate; 118, fixing hole; 119, fixing bolt; 120, U-shaped frame; 121, limiting plate; 122, limiting screw; 123, pressing plate; 130, vertical plate; 131, drying slot block; 132, drying fan; 133, electric heating wire; 140, traction slot; 141, traction screw; 142, traction motor; 143, moving slot block; 144, micro vacuum pump; 150, wind hood. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, unless otherwise specified, "multiple" means two or more.

[0026] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0027] The utility model provides a limiting mechanism for a packaging and decoration printing machine, which can effectively limit the packaging cardboard during the printing process to avoid deviation in the printing position caused by offset, thereby improving the quality of the finished product, and can dry the ink on the surface of the packaging cardboard after printing, thereby saving the time of waiting for air drying and directly entering the next process, thereby improving production efficiency. Please refer to Figure 1-4 , comprising a base 100;

[0028] Please refer again Figure 1-3A printer body 110 is fixedly connected to the top right side of the base 100. The printer body 110 is used to print packaging cardboard. A slide groove 111 is opened on the top of the base 100 and on the right side of the printer body 110. The slide groove 111 is used to install and limit the L-shaped plate 112. The front and rear sides of the inner cavity wall of the slide groove 111 are slidably connected with L-shaped plates 112. The L-shaped plates 112 are used to install a rotating rod 113. The ends of the two L-shaped plates 112 extend to the outside of the slide groove 111, and the ends of the two L-shaped plates 112 pass through the printer body 110 and extend to the outside of the printer body 110. The top left and right sides of the L-shaped plate 112 are rotatably connected with a rotating rod 113. The rotating rod 113 is used to install a rotating roller 114 so that the rotating roller 114 can realize rotation. The bottom end of the rotating rod 113 extends to the outside of the L-shaped plate 112 and is fixedly connected with a rotating roller 114. The rotating roller 114 is used to install a conveyor belt 116. The top right side of the rear L-shaped plate 112 is fixedly connected with a conveying motor 115 by bolts. The conveying motor 115 is used to drive the rear right rotating rod 113 to rotate, and the rear left rotating rod 113 is driven to rotate through the conveyor belt 116, so that the rear conveyor belt 116 rotates to drive the packaging cardboard to cooperate with the front conveyor belt 116 for transportation. The top end of the rear right rotating rod 113 is fixedly connected to the output shaft of the conveying motor 115, and the outer side walls of the rotating rollers 114 on the left and right sides are connected with the conveyor belts 116. The two conveyor belts 116 cooperate with the rotating rollers 114 to transport the packaging cardboard while The plate is limited in position, and the right side wall of the L-shaped plate 112 is fixedly connected with a fixing plate 117. The fixing plate 117 is used to cooperate with the fixing bolts 119 to fix the L-shaped plate 112 and can quickly position the packaging cardboard when it is inserted. Fixing holes 118 are opened on the front and back sides of the top of the base 100 and on the right side of the slide groove 111. The fixing holes 118 are used to install the fixing bolts 119. The fixing holes 118 are evenly distributed from the inside to the outside. The top of the fixing plate 117 is screwed with a fixing bolt 119. The fixing bolt 119 is used to cooperate with the fixing hole 118 to fix the position of the fixing plate 117, so as to adjust the position of the L-shaped plate 112 to limit the packaging cardboards of different sizes. The bottom end of the fixing bolt 119 extends to the inner cavity of the fixing hole 118 and is aligned with the fixing hole 118. 8, the top of the base 100 and the left and right sides of the printer body 110 are fixedly connected with a U-shaped frame 120, the U-shaped frame 120 is used to install a limiting screw 122 and limit the limiting plate 121, the two U-shaped frames 120 are located on the lower side of the two L-shaped plates 112, the limiting plate 121 is slidably connected between the front and rear sides of the inner wall of the U-shaped frame 120, the limiting plate 121 is used to install a pressing plate 123, the limiting screw 122 is screwed in the middle of the top of the U-shaped frame 120, the limiting screw 122 is used to adjust the position of the limiting plate 121, the bottom end of the limiting screw 122 extends to the inner side of the U-shaped frame 120 and is connected to the top bearing of the limiting plate 121, and the pressing plate 123 is fixedly connected to the middle of the bottom of the limiting plate 121.The pressure plate 123 is used to limit packaging cardboards of different thicknesses. The two pressure plates 123 are located between the inner side walls of the two conveyor belts 116. The outer side wall of the conveyor belt 116 is evenly provided with rubber strips. The rubber strips are used to increase the friction between the packaging cardboard and the conveyor belt 116 to avoid slipping during transportation. The fixing bolts 119 are rotated to disengage the current fixing holes 118. The two L-shaped plates 112 are moved respectively through the fixing plates 117 and the slide grooves 111. The relative distance between the two L-shaped plates 112 is adjusted according to the size of different packaging cardboards. The limiting screw 122 is rotated to drive the limiting plate 121 to cooperate with the U-shaped frame 120 to move, and the limiting plate 121 thereby drives the pressure plate 123 to move. The plate 123 moves and adjusts according to the packaging cardboard of different thicknesses, inserts the packaging cardboard between the two conveyor belts 116 through the two fixed plates 117, and starts the conveying motor 115 through the external controller. The output shaft of the conveying motor 115 rotates to drive the rear right rotating rod 113 to rotate, and drives the rear right rotating roller 114 to rotate. At the same time, the rear left rotating roller 114 is driven by the conveyor belt 116 to cooperate with the rear left rotating rod 113 to rotate, thereby realizing the rotation of the rear conveyor belt 116. The rear conveyor belt 116 cooperates with the packaging cardboard through friction to enable the front conveyor belt 116 to rotate. The two conveyor belts 116 cooperate with each other to transport the packaging cardboard and cooperate with the pressing plate 123 to limit the packaging cardboard.

[0029] In summary, the packaging cardboard can be effectively limited during the printing process to avoid deviation in the printing position caused by offset, thereby improving the quality of the finished product.

[0030] Please refer again Figure 1 , Figure 2 and Figure 4A vertical plate 130 is fixedly connected to the left side of the middle of the top of the base 100, and the vertical plate 130 is used to install a drying slot block 131. A drying slot block 131 is fixedly connected to the upper side of the right wall of the vertical plate 130, and the drying slot block 131 is used to install a drying fan 132. A drying fan 132 is fixedly connected to the upper side of the inner cavity wall of the drying slot block 131. The drying fan 132 is used to cooperate with the electric heating wire 133 to dry the ink on the surface of the packaging paperboard. The inner cavity wall of the drying slot block 131 and the lower side of the drying fan 132 are fixedly connected with an electric heating wire 133. The electric heating wire 133 is used to heat the air. A traction groove 132 is opened at the top of the base 100 and on the right side of the vertical plate 130. 40, the traction groove 140 is used to install the traction screw 141 and limit the movable groove block 143. The right side of the inner cavity wall of the traction groove 140 is rotatably connected with the traction screw 141 through a bearing. The traction screw 141 is used to drive the movable groove block 143 to move. The upper side of the left wall of the base 100 is fixedly connected with a traction motor 142 through bolts. The traction motor 142 is used to drive the traction screw 141 to rotate. The left end of the traction screw 141 is fixedly connected to the output shaft of the traction motor 142. The outer wall of the traction screw 141 is screwed with a movable groove block 143. The movable groove block 143 is used to pull the printed packaging cardboard to the bottom of the drying groove block 131, and move The outer wall of the slot block 143 is slidably connected to the inner wall of the traction slot 140, and a micro air pump 144 is fixedly connected to the upper side of the left wall of the movable slot block 143. The micro air pump 144 is used to cooperate with the movable slot block 143 to fix the packaging cardboard. The micro air pump 144 and the movable slot block 143 are connected through a pipeline. A rubber pad is provided on the top of the movable slot block 143. The rubber pad is used to improve the air tightness between the movable slot block 143 and the packaging cardboard. The bottom of the drying slot block 131 is fixedly connected to a wind gathering hood 150. The wind gathering hood 150 is used to gather hot air and guide it to the packaging cardboard. When the printing is completed and the packaging cardboard is pushed out, the packaging cardboard is located in the movable slot block 1 The upper part of the packaging paper is in contact with the movable slot block 143, and the micro air pump 144 is started by the external controller to extract the air between the movable slot block 143 and the packaging paperboard, so that the packaging paperboard is connected with the movable slot block 143. The traction motor 142 is started by the external controller to drive the movable slot block 143 to move to the left through the traction screw 141 so that the packaging paperboard moves to the bottom of the drying slot block 131. The drying fan 132 and the electric heating wire 133 are started by the external controller at the same time. The drying fan 132 draws air in and cooperates with the electric heating wire 133 to heat it, and then cooperates with the wind gathering cover 150 to blow hot air to the packaging paperboard to dry the ink on the surface of the packaging paperboard.

[0031] In summary, the ink on the surface of the printed packaging board can be dried, thereby saving the time of waiting for air drying and directly entering the next process, thereby improving production efficiency.

[0032] During specific use, personnel in this technical field rotate the fixing bolt 119 to disengage it from the current fixing hole 118, and move the two L-shaped plates 112 respectively through the fixing plate 117 and the slide groove 111, and adjust the relative distance between the two L-shaped plates 112 according to the size of different packaging cardboards, and rotate the limit screw 122 to drive the limit plate 121 to cooperate with the U-shaped frame 120 to move, and the limit plate 121 thereby drives the pressing plate 123 to move, and adjusts according to the packaging cardboard of different thicknesses, and inserts the packaging cardboard between the two conveyor belts 116 through the two fixing plates 117, and starts the conveying motor 115 through the external controller, and the output shaft of the conveying motor 115 rotates to drive the rear right rotating rod 113 to rotate, and drives the rear right rotating roller 114 to rotate at the same time through the conveyor belt 116 to drive the rear left rotating roller 114 to cooperate with the rear left rotating rod 113 to rotate, thereby realizing the rotation of the rear conveyor belt 116, and the rear conveyor belt 116 cooperates with the packaging cardboard through friction so that the front conveyor belt 11 6 realizes rotation, the two conveyor belts 116 cooperate with each other to convey the packaging cardboard and cooperate with the pressure plate 123 to limit the packaging cardboard, the printer body 110 is started by the external controller to print on the surface of the packaging cardboard, the printed packaging cardboard is pushed out to the top of the moving slot block 143 and contacts the moving slot block 143, the micro air pump 144 is started by the external controller to extract the air between the moving slot block 143 and the packaging cardboard, so that the packaging cardboard and the moving slot block 143 are connected, the traction motor 142 is started by the external controller to drive the moving slot block 143 to move to the left through the traction screw 141 so that the packaging cardboard moves to the bottom of the drying slot block 131, the drying fan 132 and the electric heating wire 133 are started by the external controller at the same time, the drying fan 132 draws air into the electric heating wire 133 for heating, and then blows hot air to the packaging cardboard by cooperating with the wind gathering cover 150 to dry the ink on the surface of the packaging cardboard, and the packaging cardboard can be removed after the drying is completed by releasing the fixation.

[0033] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0034] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A limiting mechanism for a packaging and decoration printing machine, characterized in that: The invention comprises a base (100), wherein the top right side of the base (100) is fixedly connected to a printer body (110), a slide groove (111) is provided at the top of the base (100) and located on the right side of the printer body (110), an L-shaped plate (112) is slidably connected to the inner cavity wall of the slide groove (111) at the front and rear sides, the ends of the two L-shaped plates (112) extend to the outside of the slide groove (111), and the ends of the two L-shaped plates (112) penetrate the printer body (110) and extend to the outside of the printer body (110), the top left and right sides of the L-shaped plate (112) are rotatably connected to a rotating rod (113), the bottom end of the rotating rod (113) extends to the outside of the L-shaped plate (112) and is fixedly connected to a rotating roller (114), and the rear side The top right side of the L-shaped plate (112) is fixedly connected to a conveying motor (115) by bolts, the top end of the rotating rod (113) on the rear right side is fixedly connected to the output shaft of the conveying motor (115), the outer side walls of the rotating rollers (114) on the left and right sides are drivingly connected to conveyor belts (116), the right side wall of the L-shaped plate (112) is fixedly connected to a fixing plate (117), the top front and rear sides of the base (100) and located on the right side of the slide groove (111) are provided with fixing holes (118), the fixing holes (118) are evenly distributed from the inside to the outside, the top of the fixing plate (117) is screwed with a fixing bolt (119), the bottom end of the fixing bolt (119) extends to the inner cavity of the fixing hole (118) and is screwed with the inner cavity wall of the fixing hole (118).

2. A packaging and decoration printing machine limiting mechanism according to claim 1, characterized in that: A U-shaped frame (120) is fixedly connected to the top of the base (100) and located on the left and right sides of the printing machine body (110); the two U-shaped frames (120) are located on the lower sides of the two L-shaped plates (112); a limit plate (121) is slidably connected between the front and rear sides of the inner side walls of the U-shaped frame (120); a limit screw (122) is screwed to the middle of the top of the U-shaped frame (120); the bottom end of the limit screw (122) extends to the inner side of the U-shaped frame (120) and is connected to the top bearing of the limit plate (121); a pressure plate (123) is fixedly connected to the middle of the bottom of the limit plate (121); the two pressure plates (123) are located between the inner side walls of the two conveyor belts (116).

3. The limiting mechanism of a packaging and decoration printing machine according to claim 1, characterized in that: The outer side wall of the conveyor belt (116) is evenly provided with rubber strips around its periphery.

4. The limiting mechanism of a packaging and decoration printing machine according to claim 1, characterized in that: A vertical plate (130) is fixedly connected to the left side of the middle of the top of the base (100); a drying slot block (131) is fixedly connected to the upper side of the right side wall of the vertical plate (130); a drying fan (132) is fixedly connected to the upper side of the inner cavity wall of the drying slot block (131); and an electric heating wire (133) is fixedly connected to the inner cavity wall of the drying slot block (131) and located below the drying fan (132).

5. The limiting mechanism of a packaging and decoration printing machine according to claim 4, characterized in that: A traction groove (140) is provided at the top of the base (100) and on the right side of the vertical plate (130); a traction screw (141) is rotatably connected to the right side of the inner cavity wall of the traction groove (140) through a bearing; a traction motor (142) is fixedly connected to the upper side of the left side wall of the base (100) through bolts; the left end of the traction screw (141) is fixedly connected to the output shaft of the traction motor (142); a movable groove block (143) is screwed to the outer side wall of the traction screw (141); and the outer side wall of the movable groove block (143) is slidably connected to the inner cavity wall of the traction groove (140); a micro air pump (144) is fixedly connected to the upper side of the left side wall of the movable groove block (143); the micro air pump (144) is connected to the movable groove block (143) through a pipeline; and a rubber pad is provided on the top of the movable groove block (143).

6. The limiting mechanism of a packaging and decoration printing machine according to claim 4, characterized in that: The bottom of the drying tank block (131) is fixedly connected with an air collecting cover (150).

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