Pneumatic ink transfer mechanism

Abstract

The utility model discloses a pneumatic ink transfer mechanism which comprises two side plates, a rotating rod is arranged between the two side plates, the rotating rod is connected with a swing arm and provided with an ink transfer roller, and the ink transfer roller is driven by a motor. The rotating rod is driven by a double-stroke air cylinder and provided with a fine adjustment assembly. The motor drives the ink transfer roller through transmission of a belt and a gear set, and the gear set is arranged on the swing arm and composed of a plurality of meshing gears. The fine adjustment assembly comprises a guide seat, an ejector rod and an adjusting rod with a hand wheel, and the posture of the ink transfer roller can be accurately adjusted. The mechanism can adapt to plate rollers with different diameters, ensures uniform transfer of printing ink, and improves the plate changing efficiency and the printing quality.

Description

TECHNICAL FIELD

[0001] The utility model relates to printing machinery technical field especially relates to a kind of pneumatic type ink transfer mechanism suitable for gravure printing machine. BACKGROUND

[0002] Gravure printing is a kind of printing method, which engraves or etches text and graphics grooves on the surface of printing plate cylinder, then fills ink in the grooves and transfers to the printed matter. In gravure printing machine, plate roller is the core component to realize text transfer, and its diameter and the distribution of engraved pattern directly determine the printing width, register accuracy and artistic expression of pattern.

[0003] In actual production, because the printing pattern, size, color distribution and process requirements of different products are different, plate roller often needs to be frequently replaced according to specific printing task. In the plate roller replacement scheme of traditional gravure printing machine, in order to cooperate with the existing ink transfer system structure, it is usually required that the plate roller replaced each time keeps consistent outer diameter. This is because the positions and distances of multiple ink rollers in the traditional ink transfer mechanism are fixed in the design and manufacturing stage, and the ink is transferred to the surface of plate roller by these fixed ink rollers one by one. If the diameter of the plate roller replaced changes significantly, the fixed structure of ink roller will not be able to guarantee the uniformity of contact pressure with the surface of plate roller and the consistency of ink supply, and it is easy to cause insufficient or excessive ink supply, thereby affecting the printing quality and even causing the increase of scrap rate.

[0004] In addition, the arrangement of ink roller in traditional ink transfer mechanism is pure mechanical rigid connection, which lacks automatic or convenient angle and position adjustment means. When the diameter of plate roller changes, the operator can only rely on manual rough adjustment or replace the whole ink roller assembly, which not only consumes time and effort, but also is difficult to meet the demand of quick plate replacement in high-speed continuous production, and limits the flexible production capacity and the improvement of automation level of equipment.

[0005] With the continuous growth of market demand for diversification and personalization of printed products, gravure printing machine is also continuously upgraded. In order to arrange pattern layout more reasonably, improve plate utilization rate and realize special visual effect, the diameter change of plate roller when replaced has become the norm in modern printing process. This requires that the ink transfer mechanism should have the ability to cope with plate rollers of different diameters in structure, that is, after replacing plate roller, the ink roller and the surface of plate roller can still maintain appropriate contact state through reliable mechanical and pneumatic cooperation, so as to realize uniform and stable ink transfer.

[0006] However, the existing fixed or single cylinder driven ink transfer mechanism has the following disadvantages:

[0007] 1. Poor adaptability: the structure is rigidly fixed, and it cannot automatically match plate rollers of different diameters, resulting in manual intervention or replacement of parts after replacement, and low production efficiency.

[0008] 2. Limited adjustment accuracy: Simply relying on cylinder stroke control to position the ink transfer roller, it is difficult to balance large range angle adjustment and fine attitude correction, and uneven ink transfer is prone to occur.

[0009] 3. Insufficient transmission stability: Some existing solutions use single-stage gears or belts for direct drive, lacking reasonable deceleration / increase links, which can easily cause ink transfer roller speed fluctuations, affecting ink coating consistency.

[0010] 4. Inconvenient operation: Lack of convenient fine adjustment mechanism, on-site debugging relies on experience, increasing training costs and equipment downtime.

[0011] Therefore, there is an urgent need for an ink transfer mechanism that can automatically adapt to different diameter rollers, has large range pneumatic drive and high precision fine adjustment capability, and stable and reliable transmission, to solve the shortcomings of existing technology in terms of version adaptation, adjustment accuracy and production efficiency. Invention content

[0012] To solve the above problems, the utility model provides a pneumatic type ink transfer mechanism, which aims to automatically adjust the position and angle of the ink transfer roller when replacing different diameter rollers, ensure uniform ink transfer, improve version efficiency and printing quality, and has large range pneumatic drive and high precision fine adjustment capability.

[0013] To achieve the above purpose, the utility model provides the following technical scheme: a pneumatic type ink transfer mechanism, comprising two side plates, a rotating rod is arranged between the two side plates, a swing arm is connected to the rotating rod, an ink transfer roller is installed on the swing arm, and the ink transfer roller is driven by a motor; the rotation of the rotating rod is driven by a double-stroke cylinder, and a fine adjustment assembly is also provided corresponding to the rotating rod.

[0014] The utility model is further provided: the motor is installed on the side plate, a first pulley is arranged on the output shaft of the motor; a rotating sleeve is arranged on one side of the rotating rod, a second pulley is arranged on one side of the rotating sleeve, and an output gear is arranged on the other side; the second pulley is in transmission connection with the first pulley through a belt, the output gear is in transmission connection with the end shaft of the ink transfer roller through a gear set, the gear set is installed on the swing arm, the gear set is composed of a plurality of meshing transmission gears, the end shaft of the ink transfer roller is connected with the last transmission gear, and the output gear is meshing matched with the first transmission gear;

[0015] The utility model further sets up: the double stroke air cylinder is installed on the side plate, the axle end of rotary lever is connected with connecting rod, the end of connecting rod is hinged with the piston rod of double stroke air cylinder, the fine adjustment assembly acts on the connecting rod drives rotary lever rotation, the fine adjustment assembly includes the guide seat of fixed on the side plate, the jack and the adjusting lever, be equipped with the lead hole on the guide seat, the jack is inserted into the lead hole and can along the lead hole telescopic activity, the peripheral wall of jack is equipped with the positioning groove along the length direction, the guide seat is screwed with the positioning bolt, the screw rod end part of positioning bolt inserts into the positioning groove of jack to prevent the jack rotation, the positioning rotary seat is fixed on the side plate, the adjusting lever is rotatably arranged on the positioning rotary seat, the one end of adjusting lever is threadedly connected with the one end of jack, and the other end is equipped with hand wheel.

[0016] The utility model further sets up: gear set includes at least two transmission gears, forms transmission path in proper order.

[0017] The utility model further sets up: the piston rod stroke of double stroke air cylinder is adjustable to adapt to the ink transmission angle requirement of different diameter plate roller.

[0018] The utility model has the advantages of:

[0019] 1. adopt pneumatic drive to combine fine adjustment assembly, can when replacing different diameter plate roller fast adjustment ink transmission roller angle and position, guarantee the evenness of ink transmission.

[0020] 2. utilize the transmission of belt and gear set, realize power steady distribution, reduce vibration and wear.

[0021] 3. fine adjustment assembly simple and reliable structure, can through hand wheel accurate control ink transmission roller posture, improve the precision and efficiency of change edition.

[0022] 4. compact overall structure, adapts multiple plate roller specifications, significantly improve the adaptability and automation level of intaglio printing machine.

[0023] The utility model will be further described in connection with the drawings and specific embodiment. DRAWINGS

[0024] Figure 1 It is the perspective view of the specific embodiment of the utility model;

[0025] Figure 2 It is the partial structure diagram of the specific embodiment of the utility model.

[0026] Explanation of reference signs: 101, side plate; 102, rotating rod; 103, swing arm; 104, ink transfer roller; 106, double stroke cylinder; 107, connecting rod; 108, fine adjustment assembly; 109, guide seat; 110, ejector rod; 1101, positioning groove; 111, adjusting rod; 113, positioning rotating seat; 115, motor; 116, first pulley; 117, rotating sleeve; 118, second pulley; 119, output gear; 121, gear set; 122, transmission gear; 123, end shaft. DETAILED DESCRIPTION

[0027] The utility model will be described in detail below through examples, which are only used for further illustrating the utility model and cannot be understood as limiting the protection scope of the utility model.

[0028] As shown in Figure 1 , Figure 2 , the embodiment discloses a pneumatic ink transfer mechanism, which comprises two side plates 101, a rotating rod 102 is arranged between the two side plates 101, two swing arms 103 are connected to the rotating rod 102, and an ink transfer roller 104 is installed between the two swing arms 103. The ink transfer roller 104 is driven by a motor 115, the motor 115 is installed on the side plate 101, a first pulley 116 is arranged on the output shaft of the motor 115, a rotating sleeve 117 is arranged on one side of the rotating rod 102, a second pulley 118 is arranged on one side of the rotating sleeve 117, and an output gear 119 is arranged on the other side of the rotating sleeve 117. The second pulley 118 is in transmission connection with the first pulley 116 through a belt, so that the power of the motor 115 is transmitted to the rotating sleeve 117. The output gear 119 is in transmission connection with the end shaft 123 of the ink transfer roller 104 through a gear set 121. The gear set 121 is installed on the swing arm 103 and is composed of a plurality of transmission gears 122 that are in meshing cooperation, the end shaft 123 of the ink transfer roller 104 is connected with the transmission gear 122 located at the last end, and the output gear 119 is in meshing cooperation with the transmission gear 122 located at the front end, so that the rotary motion is transmitted to the ink transfer roller 104, and the ink transfer roller 104 rotates around its axis to transfer ink.

[0029] The double stroke cylinder 106 is installed on the side plate 101, the piston rod of the double stroke cylinder 106 is movably hinged to one end of the connecting rod 107, the other end of the connecting rod 107 is fixedly connected with the shaft end of the rotating rod 102. When the double stroke cylinder 106 works, the rotating rod 102 is swung around its axis through the connecting rod 107, so that the positions and angles of the swing arm 103 and the ink transfer roller 104 relative to the plate roller are changed, the stroke output of the double stroke cylinder 106 has a short stroke and a long stroke, so that different diameters of the plate roller can be adapted.

[0030] The rotating rod 102 is also provided with a fine adjustment assembly 108 for fine adjustment of the angle of the rotating rod 102. The fine adjustment assembly 108 comprises a guide seat 109 fixed on the side plate 101, a top rod 110 and an adjusting rod 111. The guide seat 109 is provided with a guide hole, and the top rod 110 penetrates into the guide hole and can extend and retract along the guide hole. The peripheral wall of the top rod 110 is provided with a positioning groove 1101 along the length direction, and the guide seat 109 is screwed with a positioning bolt, the screw end of the positioning bolt is inserted into the positioning groove 1101 of the top rod 110, so as to prevent the top rod 110 from rotating when extending and retracting. The side plate 101 is fixed with a positioning rotating seat 113, and the adjusting rod 111 is rotatably arranged on the positioning rotating seat 113, one end of the adjusting rod 111 is threadedly connected with one end of the top rod 110, and the other end of the adjusting rod 111 is provided with a hand wheel. When the hand wheel is rotated, the top rod 110 can be controlled to extend and retract, and the end of the top rod 110 is abutted against the side wall of the connecting rod 107, so as to achieve the fine adjustment effect, thereby avoiding insufficient stroke of the double-stroke air cylinder 106.

[0031] In operation, the motor 115 is operated to drive the rotating sleeve 117 and the output gear 119 to rotate through the first belt pulley 116, the belt and the second belt pulley 118, and then drive the ink transmission roller 104 to rotate through the gear set 121. The double-stroke air cylinder 106 drives the connecting rod 107 to swing the rotating rod 102, so as to realize large-range position and angle adjustment of the ink transmission roller 104. When higher precision is required, the hand wheel can be rotated to drive the adjusting rod 111 to drive the top rod 110 to extend and retract in the guide seat 109, and the fine adjustment torque is applied to the rotating rod 102 through the connecting rod 107, so as to realize accurate control of the posture of the ink transmission roller 104, ensure appropriate contact pressure and ink transmission effect between the ink transmission roller 104 and the plate roller with different diameters, and effectively improve the flexibility and intelligent level of the intaglio printing machine.

Claims

1. A pneumatic ink transfer mechanism, characterized by: The utility model provides a kind of ink roller transmission mechanism, including two side plates (101), and rotating rod (102) is equipped between two side plates (101), the rotating rod (102) is connected with swing arm (103), the swing arm (103) is installed with ink roller (104), the ink roller (104) is driven by motor (115);The rotation of the rotating rod (102) is driven by double-stroke cylinder (106), and fine adjustment assembly (108) is also provided corresponding to the rotating rod (102).

2. The pneumatic ink transfer mechanism of claim 1, wherein: The motor (115) is installed on the side plate (101), and a first pulley (116) is provided on the output shaft of the motor (115);A rotating sleeve (117) is provided on one side of the rotating rod (102), the rotating sleeve (117) is provided with a second pulley (118) on one side and an output gear (119) on the other side;The second pulley (118) is drivingly connected with the first pulley (116) by a belt, and the output gear (119) is drivingly connected with the end shaft (123) of the ink roller (104) by a gear set (121), the gear set (121) is installed on the swing arm (103), and the gear set (121) is composed of a plurality of meshing transmission gears (122), the end shaft (123) of the ink roller (104) is connected with the last transmission gear (122), and the output gear (119) is meshingly engaged with the first transmission gear (122).

3. The pneumatic ink transfer mechanism of claim 1, wherein: The double-stroke cylinder (106) is installed on the side plate (101), and the shaft end of the rotating rod (102) is connected with a connecting rod (107), the end of the connecting rod (107) is movably hinged with the piston rod of the double-stroke cylinder (106), the fine adjustment assembly (108) acts on the connecting rod (107) to drive the rotating rod (102) to rotate, the fine adjustment assembly (108) includes a guide seat (109) fixed on the side plate (101), a top rod (110), and an adjusting rod (111);The guide seat (109) is provided with a guide hole, the top rod (110) penetrates into the guide hole and can be telescopically movable along the guide hole, the peripheral wall of the top rod (110) is provided with a positioning slot in the length direction, the guide seat (109) is screwed with a positioning bolt, the screw end of the positioning bolt is inserted into the positioning slot of the top rod (110) to prevent the top rod (110) from rotating;The side plate (101) is fixed with a positioning rotating seat (113), the adjusting rod (111) is rotatably arranged on the positioning rotating seat (113), one end of the adjusting rod (111) is threadedly drivingly connected with one end of the top rod (110), and the other end of the adjusting rod (111) is provided with a hand wheel.

4. The pneumatic ink transfer mechanism of claim 2, wherein: The gear set (121) includes at least two transmission gears (122), which are sequentially meshed to form a transmission path.

5. The pneumatic ink transfer mechanism of claim 2, wherein: The stroke of the piston rod of the double-stroke cylinder (106) is adjustable to adapt to the ink transmission angle requirements of ink rollers of different diameters. ​

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