Printing machine drying box with adjustable structure

Abstract

A printing machine drying box with an adjustable structure comprises a box body and a plurality of long-strip-shaped air nozzles located on the air outlet side of the box body, each air nozzle comprises two oppositely-arranged air guide plates, and an air outlet is formed in the gap between the two air guide plates. Tuyere width adjusting mechanisms are arranged at the two ends of the tuyeres respectively, tuyere angle adjusting mechanisms are arranged on the tuyeres close to the feeding port and the tuyeres close to the discharging port, and tuyere width adjusting mechanisms are arranged on the tuyeres between the tuyeres of the feeding port and the tuyeres of the discharging port. The width of the tuyere is adjusted, the width of the tuyere is adjusted, and the angle of the tuyere is adjusted.

Description

Technical Field

[0001] This utility model relates to the field of printing equipment technology, and in particular to a printing press drying oven with an adjustable structure. Background Technology

[0002] Existing packaging printing equipment, including gravure printing, flexographic printing, and other forms of letterpress printing, relies heavily on drying ovens as a crucial component. The drying performance of the oven is a primary factor in evaluating the production efficiency of a printing press, i.e., the printing speed. Drying ovens with different heat sources have varying structures, including electric heating, steam heating, oil heating, and other heating methods. These drying ovens mainly consist of a fixed base and a movable chamber. During normal production, the heat source in the heating chamber is set at a specific temperature, and a fan delivers hot air into the corresponding movable chamber. The hot air is then guided by baffles within the chamber and evenly expelled through nozzles, causing the solvent in the ink on the printed surface to evaporate and solidify, allowing the ink to proceed to the next printing color group and completing the entire printing process.

[0003] To increase drying speed, existing drying ovens mainly increase their length. On the other hand, to reduce energy consumption, structural improvements are mainly made in terms of hot air recycling. These two aspects are the main focus of current improvements to all printing press drying ovens.

[0004] The shortcomings of existing drying ovens are as follows:

[0005] 1) For printing substrates of different widths, since the width of the air nozzles in the drying oven is fixed, when the width of the printing substrate is smaller than the width of the air nozzles, the hot air from the air nozzles at both ends of the substrate is a waste of energy.

[0006] 2) For different printed materials, the pattern distribution is also different and uneven. The width of the air nozzles in the existing drying ovens is fixed and cannot be adjusted. Therefore, large-area drying of graphics can only be achieved by adjusting the air volume and temperature, which cannot be accurately positioned.

[0007] 3) Since the drying oven requires negative pressure to reduce heat loss and provide a comfortable working environment, the current drying ovens have fixed air inlet and outlet angles that cannot be adjusted according to changes in air volume. The only way to maintain the negative pressure is to increase the exhaust volume of the drying oven, which is also a waste of energy. Summary of the Invention

[0008] The technical problem to be solved by this utility model is to provide a printing press drying oven with an adjustable structure, thereby solving the technical problems existing in the prior art.

[0009] To solve the above-mentioned technical problems, the technical solution of this utility model is: a printing machine drying oven with an adjustable structure, including a box body and a number of air nozzles located on the air outlet side of the box body. Each air nozzle includes two oppositely arranged air guide plates, and the gap between the two air guide plates forms an air outlet. Each end of the air nozzle is provided with an air nozzle width adjustment mechanism, and the air nozzles near the feed inlet and near the discharge outlet are provided with air nozzle angle adjustment mechanisms. The air nozzle between the feed inlet air nozzle and the discharge outlet air nozzle is provided with an air nozzle width adjustment mechanism. The principle of this invention is as follows: When drying printed materials of different widths in a drying oven, the width of the nozzles is adjusted by a nozzle width adjustment mechanism, allowing different widths of printed materials to correspond to the corresponding width of the drying oven nozzles, thus achieving precise drying. For different types of printed materials, the nozzle width adjustment mechanism can also be used to adjust the nozzle width, allowing for different airflow rates with different nozzle widths under the same airflow conditions, thus enabling precise adjustments based on the characteristics of the printed materials. Regarding the negative pressure requirements of the drying oven cavity, the outlet angle adjustment mechanism adjusts the airflow angle of the inlet and outlet ports under different airflow conditions, thereby achieving precise control of the negative pressure in the drying oven cavity during different airflow drying processes. In particular, without increasing the exhaust power of the drying oven, the negative pressure requirements of the drying oven are achieved by adjusting the nozzle angles of the inlet and outlet ports, thus reducing energy waste.

[0010] As an improvement, the nozzle width adjustment mechanism includes several telescopically arranged baffles and a drive assembly for driving the baffles to extend and retract, the baffles blocking the nozzle; the nozzle angle adjustment mechanism includes a first adjusting screw, two air guide plates are respectively movably connected to the housing and a linkage is provided between them, the first adjusting screw is fixed to the housing by a first adjusting bracket, and the first adjusting screw is threadedly connected to one of the air guide plates; the nozzle width adjustment mechanism includes a second adjusting screw, two air guide plates are respectively movably connected to the housing, the second adjusting screw passes through the two air guide plates and is threadedly connected to the two air guide plates.

[0011] As an improvement, the air outlet side of the housing is provided with several support guide rollers, which are located in front of the air nozzles and correspond one-to-one with the air nozzles.

[0012] As an improvement, the housing includes a rear sealing plate, side sealing plates on both sides, and a front sealing plate. The air nozzle is located on the front sealing plate, and the rear sealing plate and side sealing plates are insulation boards.

[0013] As an improvement, the wind deflector includes a fixed wind deflector and several movable wind deflectors. The fixed wind deflector is fixed on the housing. The movable wind deflectors of adjacent air nozzle width adjustment mechanisms on the same side are connected by a connecting plate to form a movable assembly. The driving assembly acts on one of the connecting plates.

[0014] As an improvement, the housing is provided with a guide rod, the guide rod is provided with a guide sleeve, and the movable component is connected to the guide sleeve.

[0015] As an improvement, the air guide plate connected to the first adjusting screw is movably connected to the housing via a hinge, and the other air guide plate is movably connected to the housing via a flexible component.

[0016] As an improvement, the first adjusting screw is threadedly connected to the air guide plate via a first washer, and the first washer is located on the back of the air guide plate.

[0017] As an improvement, a compression spring is fitted onto the second adjusting screw, and the compression spring is located between the two air guide plates.

[0018] As an improvement, the two air guide plates connected to the second adjusting screw are movably connected to the housing via hinges.

[0019] The beneficial effects of this utility model compared with the prior art are:

[0020] 1. When drying printed materials of different widths in the drying oven, the width of the air nozzles can be adjusted by the air nozzle width adjustment mechanism so that printed materials of different widths can be matched with the corresponding width of the drying oven air nozzles, thereby achieving precise drying;

[0021] 2. For drying different types of printed materials, the width of the nozzle can be adjusted through the nozzle width adjustment mechanism. Under the premise of the same air volume, different nozzle widths can produce different air speeds, thus enabling precise adjustment according to the characteristics of the printed materials.

[0022] 3. Regarding the negative pressure requirement of the drying chamber, under the premise of drying with different air volumes, the air outlet angle of the discharge port and the discharge outlet can be adjusted by the nozzle angle adjustment mechanism to achieve precise control of the negative pressure of the drying chamber when drying with different air volumes. In particular, the negative pressure requirement of the drying chamber can be achieved by adjusting the nozzle angle of the inlet and outlet without increasing the exhaust power of the drying chamber, thereby reducing energy waste. Attached Figure Description

[0023] Figure 1 A side view diagram for drying.

[0024] Figure 2 This is the first type of nozzle width adjustment mechanism.

[0025] Figure 3 This is the second type of nozzle width adjustment mechanism.

[0026] Figure 4 This is the feed inlet nozzle angle adjustment mechanism.

[0027] Figure 5 This is a mechanism for adjusting the angle of the discharge nozzle.

[0028] Figure 6 This is the nozzle width adjustment mechanism. Detailed Implementation

[0029] The present invention will be further described below with reference to the accompanying drawings.

[0030] like Figure 1 As shown, a printing press drying chamber with an adjustable structure includes a chamber body 5 and several air nozzles located on the air outlet side of the chamber body 5. Several supporting guide rollers 4 are provided on the air outlet side of the chamber body 5. The two ends of the supporting rollers 4 are pivotally connected to the chamber body 5. The supporting guide rollers 4 are located in front of the air nozzles and correspond one-to-one with the air nozzles. The film material enters the chamber body 5 from the feed inlet, passes through the supporting guide rollers 4 in sequence, and exits from the discharge outlet. The heat seal is blown out by the air nozzles and acts on the film material. The chamber body 5 includes a rear sealing plate, side sealing plates 51 located on both sides, and a front sealing plate 52. The rear sealing plate and side sealing plates 51 are insulation boards, and each sealing plate forms an air cavity. The air nozzles are located on the front sealing plate 52. After hot air enters the air cavity, it is evenly delivered to the surface of the film material through the air nozzles.

[0031] like Figure 1 As shown, the air nozzles are elongated and arranged in parallel, evenly distributed according to the film-moving path. Each air nozzle includes two opposing air guide plates, including a lower air guide plate and an upper air guide plate, with the gap between the two air guide plates forming an air outlet. The air guide plate is L-shaped, with one end connected to the housing 5 and the other end bent, resulting in high structural strength. The air outlet is trumpet-shaped, with its width narrowing from the inlet end to the outlet end. The air nozzle near the inlet is the first air nozzle 1, the air nozzle near the outlet is the second air nozzle 2, and the air nozzle between the first air nozzle 1 and the second air nozzle 2 is the third air nozzle 3. In this embodiment, there are a total of ten air nozzles, of which eight are third air nozzles 3. The width and angle of the third air nozzles 3 are adjustable, as are the angles of the first air nozzles 1 and the second air nozzles 2.

[0032] like Figure 2 , 3As shown, the third air nozzle 3 has air nozzle width adjustment mechanisms 6 at both ends. Each air nozzle width adjustment mechanism 6 includes several telescopically adjustable baffles and a drive assembly for extending and retracting the baffles. Each baffle includes a front baffle and a side baffle. The side baffle is fixed to the front sealing plate 52 of the housing 5 and blocks the air nozzle. The side baffle has a protruding strip formed by compression, which acts as a guide rail, allowing for stable extension and retraction between adjacent baffles. Each baffle includes a fixed baffle 61 and several movable baffles 62. The fixed baffle 61 is fixed to the front sealing plate 52 of the housing 5. The movable baffles 62 of adjacent air nozzle width adjustment mechanisms 6 on the same side are connected by a connecting plate 65 to form a movable assembly. The drive assembly acts on the connecting plate 65 in the middle position, causing the movable baffles 62 of all air nozzle width adjustment mechanisms to extend and retract through the drive plate 65. The side sealing plate 51 of the housing 5 is provided with a guide rod 63, and the guide rod 63 is provided with a guide sleeve 64. The movable component is connected to the guide sleeve 64 to improve the smoothness of the movement of the movable baffle 62. The driving component includes an adjusting screw 66. One end of the adjusting screw 66 is threadedly connected to the connecting plate 65, and the other end of the adjusting screw 66 passes through the side sealing plate 51 and is connected to the adjusting handle 67. By rotating the adjusting handle 67, the adjusting screw 66 is driven, thereby driving the connecting plate 65 to move left and right along the adjusting screw 66. Alternatively, the adjusting screw 66 can also be driven by a motor 68. In the actual printing process, the width of the printing substrate is less than or equal to the width of the air nozzle of the drying oven. When the width of the printing substrate is less than the width of the air nozzle of the drying oven, the baffle is extended or retracted by adjusting the adjusting handle until the width of the air nozzle is adjusted to match the width of the printing substrate according to the indication on the effective width scale of the air nozzle.

[0033] like Figure 4 , 5As shown, a first air nozzle 1 near the feed inlet and a second air nozzle 2 near the discharge outlet are equipped with an air nozzle angle adjustment mechanism 7. The air nozzle angle adjustment mechanism 7 includes a first adjusting screw 72, which is fixed to the front sealing plate 52 of the housing 5 via a first adjusting bracket 74. The first adjusting screw 72 can rotate freely on the first adjusting bracket 74, and two first fixing nuts 73 are provided on the first adjusting screw 72 to clamp the first adjusting bracket 74. The first adjusting screw 72 is threadedly connected to a nearby air guide plate 71, which is movably connected to the front sealing plate 52 of the housing 5 via a first hinge 76. In this embodiment, the first adjusting screw 72 is threadedly connected to the air guide plate 71 via a first pad 75, which is located on the back of the air guide plate 71. The corresponding other air guide plate 71 is movably connected to the housing 5 via a flexible member 77. A linkage member is provided between the two air guide plates 71, meaning the two air guide plates 71 can move in conjunction. The nozzle angle is adjusted by adjusting the first adjusting screw 72. After the nozzle angle is adjusted to the appropriate position, the position of the first adjusting screw 66 is fixed by the fixing screw.

[0034] like Figure 6 As shown, a nozzle width adjustment mechanism 8 is provided on the third nozzle 3 between the first nozzle 1 and the second nozzle 2. The nozzle width adjustment mechanism 8 includes a second adjusting screw 82, two air guide plates 81 are respectively movably connected to the front sealing plate 52 of the housing 5, and the second adjusting screw 82 passes through the two air guide plates 81 and is threadedly connected to the two air guide plates 81. In this embodiment, the two air guide plates 81 connected to the second adjusting screw 82 are respectively movably connected to the front sealing plate 52 of the housing 5 through a second hinge 85. A second pad 83 is provided on the back of the two air guide plates 81, and the second adjusting screw 82 is threadedly connected to the air guide plates 81 through the second pad 83. The second adjusting screw 82 has threads arranged in opposite directions at both ends, and the two threads are respectively threadedly connected to the two air guide plates 81. Rotating the second adjusting screw 82 can make the two air guide plates 81 move in opposite directions, resulting in the nozzle expanding or contracting. A compression spring 84 is fitted onto the second adjusting screw 82, and the compression spring 84 is located between the two air guide plates 81; a second fixing nut 83 is provided on the second adjusting screw 82. The width of the air nozzle is adjusted by adjusting the second adjusting screw 82. The function of the compression spring 84 is to ensure that the air nozzle is in an open state, so as not to droop or shake due to gravity and the wind speed in the cavity. After the air nozzle is adjusted to a suitable width, the second fixing nut 83 is fixed to ensure that the second adjusting screw 82 does not loosen.

[0035] The principle of this invention is as follows: When drying printed materials of different widths in the drying oven, the width of the nozzles is adjusted by the nozzle width adjustment mechanism 6, so that different widths of printed materials can be matched with the corresponding width of the drying oven nozzles, thereby achieving precise drying. For drying different printed materials, the width of the nozzles can be adjusted by the nozzle width adjustment mechanism 8, so that different widths of nozzles can have different air speeds under the premise of the same air volume, thereby enabling precise adjustment according to the characteristics of the printed materials. Regarding the negative pressure requirements of the drying oven cavity, under the premise of drying with different air volumes, the air outlet angle adjustment mechanism 7 adjusts the air outlet angle of the discharge port, thereby achieving precise control of the negative pressure of the drying oven cavity when drying with different air volumes. In particular, the negative pressure requirements of the drying oven are achieved by adjusting the nozzle angle of the inlet and outlet without increasing the exhaust power of the drying oven, thereby reducing energy waste.

Claims

1. A printing press drying oven with an adjustable structure, comprising a chamber body and a plurality of air nozzles located on the air outlet side of the chamber body, wherein each air nozzle comprises two opposing air guide plates, and the gap between the two air guide plates forms an air outlet; characterized in that: The nozzles are equipped with nozzle width adjustment mechanisms at both ends, nozzle angle adjustment mechanisms on the nozzles near the feed inlet and the nozzles near the discharge outlet, and nozzle width adjustment mechanisms on the nozzles between the feed inlet nozzle and the discharge outlet nozzle.

2. A printing press drying oven with an adjustable structure according to claim 1, characterized in that: The nozzle width adjustment mechanism includes several telescopically arranged baffles and a drive assembly for driving the baffles to extend and retract. The baffles cover the nozzles. The nozzle angle adjustment mechanism includes a first adjusting screw. Two air guide plates are movably connected to the housing and are connected by a linkage. The first adjusting screw is fixed to the housing by a first adjusting bracket and is threadedly connected to one of the air guide plates. The nozzle width adjustment mechanism includes a second adjusting screw. Two air guide plates are movably connected to the housing. The second adjusting screw passes through the two air guide plates and is threadedly connected to both air guide plates.

3. A printing press drying oven with an adjustable structure according to claim 1, characterized in that: The air outlet side of the housing is provided with several support guide rollers, which are located in front of the air nozzles and correspond one-to-one with the air nozzles.

4. A printing press drying oven with an adjustable structure according to claim 1, characterized in that: The enclosure includes a rear sealing plate, side sealing plates on both sides, and a front sealing plate. The air nozzle is located on the front sealing plate, and the rear sealing plate and side sealing plates are insulation boards.

5. A printing press drying oven with an adjustable structure according to claim 2, characterized in that: The wind deflector includes a fixed wind deflector and several movable wind deflectors. The fixed wind deflector is fixed on the housing. The movable wind deflectors of adjacent air nozzle width adjustment mechanisms on the same side are connected by a connecting plate to form a movable assembly. The driving assembly acts on one of the connecting plates.

6. A printing press drying oven with an adjustable structure according to claim 5, characterized in that: The housing is provided with a guide rod, and the guide rod is provided with a guide sleeve. The movable component is connected to the guide sleeve.

7. A printing press drying oven with an adjustable structure according to claim 2, characterized in that: The air guide plate connected to the first adjusting screw is movably connected to the housing via a hinge, and the other air guide plate is movably connected to the housing via a flexible component.

8. A printing press drying oven with an adjustable structure according to claim 2, characterized in that: The first adjusting screw is threadedly connected to the air guide plate via a first washer, which is located on the back of the air guide plate.

9. A printing press drying oven with an adjustable structure according to claim 2, characterized in that: The second adjusting screw is fitted with a compression spring, which is located between the two air guide plates.

10. A printing press drying oven with an adjustable structure according to claim 2, characterized in that: The two air guide plates connected to the second adjusting screw are movably connected to the housing via hinges.

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