Flexible printing plate pressing mechanism of sleeve unit

Abstract

The utility model discloses a flexographic plate pressing mechanism of a sleeve unit, and belongs to the technical field of printing machinery. Existing flexographic plate pressing mechanisms are tedious and time-consuming in plate replacement. The mechanism comprises a seat body, wherein a plate cylinder and an anilox roller ink transfer system are arranged on the seat body; the plate cylinder is composed of an air expansion shaft and a plate sleeve, one end of the air expansion shaft is provided with an air supporting shaft and a first plug block, the other end of the air expansion shaft is provided with a telescopic rotating shaft and a second plug block, and the rotating shaft is driven by a telescopic air cylinder through a guide seat and a guide rail. During plate replacement, the telescopic cylinder retracts the rotating shaft, the roller is taken out manually or by a crane, and the cylinder is pushed tightly to complete installation during plate installation. And the anilox roller and the doctor blade ensure quantitative and uniform ink transfer and control the contact pressure. According to the structure, the plate cylinder can be quickly disassembled and assembled, positioning is reliable, good ink transfer performance is kept, and plate changing efficiency and printing quality are improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to printing machinery technical field especially relates to a mechanism for sleeve machine group soft printing plate cylinder, be applicable to the quick change plate structure of the integrated flexible plate printing unit on the intaglio printing machine. BACKGROUND

[0002] With the diversification of packaging printing demand, combined printing equipment (can realize the on-line production of processes such as intaglio printing, soft printing, silk printing, gold stamping on the same machine) is widely used. In the soft printing unit, the plate cylinder is the core component for realizing pattern transfer, and its surface needs to be customized with a plate sleeve according to the printing pattern, so the plate cylinder needs to be frequently replaced. In the traditional structure, the plate cylinder is mostly a whole rigid shaft structure, which needs to be completely disassembled and repositioned when replaced, and the process is complicated and time-consuming, which seriously affects the production efficiency, and is highly dependent on the physical strength of the operator and lifting equipment, and has safety hazards. In addition, the contact pressure of the anilox roller and the plate cylinder needs to be adjusted repeatedly during the replacement process, which easily causes damage to the mesh hole or uneven ink transfer.

[0003] Therefore, there is an urgent need for a plate cylinder supporting and driving structure that can realize quick disassembly, reliable positioning and convenient operation, to reduce the plate changing time, improve equipment utilization and printing quality. UTILITY MODEL CONTENT

[0004] In view of the problems of complicated, time-consuming and high labor intensity of the existing soft printing plate cylinder mechanism, a sleeve machine group soft printing plate cylinder mechanism is provided, which enables quick disassembly and accurate positioning of the plate cylinder, and can stably maintain the small contact pressure between the anilox roller and the plate cylinder, ensuring uniform ink transfer and printing quality.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical scheme: a sleeve machine group soft printing plate cylinder mechanism, comprising a seat body, a plate cylinder and an anilox roller ink transfer system are installed on the seat body, the plate cylinder comprises a gas expansion shaft and a plate sleeve sleeved thereon; one end of the gas expansion shaft is provided with a gas support shaft, the middle hole of the gas support shaft is communicated with a gas pump and is rotatably installed on the seat body through a bearing, and the end portion is provided with a first plug, the first plug can be inserted into the groove corresponding to the end of the plate cylinder; the other end of the gas expansion shaft is provided with a telescopic shaft, the shaft is installed on a guide seat through a bearing, the guide seat can slide along the guide rail fixed on the seat body and is driven by a telescopic cylinder; the end portion of the shaft is provided with a second plug, the second plug can be inserted into the groove at the other end of the gas expansion shaft; the anilox roller ink transfer system comprises an anilox roller, a doctor blade and a controllable contact pressure structure between the anilox roller and the plate cylinder.

[0006] Further provided is that when the plugs of the gas support shaft and the shaft are inserted into the groove of the plate cylinder, the gas inside the gas expansion shaft makes the plate sleeve expand and fix.

[0007] Further, the piston rod of the telescopic cylinder is connected with the guide seat, and is used for driving the guide seat to move along the guide rail, so that the telescopic shaft is realized.

[0008] Further, the surface of the anilox roller is provided with dense mesh holes, which are used for quantitatively taking ink from the ink groove and transferring to the plate sleeve.

[0009] Further, the doctor blade is close to the surface of the anilox roller, which is used for scraping the excess ink on the surface of the anilox roller, and only the ink in the mesh hole is reserved.

[0010] Further, the contact pressure between the anilox roller and the plate cylinder is kept as a small value, so as to prevent the mesh hole ink from being squeezed and the plate from being damaged.

[0011] The beneficial effects of the utility model are:

[0012] 1. The structure of the air expansion shaft cooperates with the detachable air support shaft at both ends and the telescopic shaft, realizes the quick disassembly and assembly of the plate cylinder, significantly shortens the plate changing time, and reduces the labor intensity.

[0013] 2. The plug positioning of the air support shaft and the shaft is reliable, and the coaxiality of the cylinder installation and the stability of the operation are ensured.

[0014] 3. The anilox roller and the plate cylinder keep a small controllable contact pressure, avoid the mesh hole ink from being squeezed and the plate from being damaged, improve the ink transfer uniformity and the printing quality.

[0015] 4. The overall structure is compact, can be matched with various combined printing equipment, and meets the efficient production needs of complex packaging printing.

[0016] The utility model will be further described below in combination with the drawings and specific embodiments. DRAWINGS

[0017] Figure 1 It is the structure diagram of the specific embodiment of the utility model;

[0018] Figure 2 It is the installation diagram of the plate cylinder in the specific embodiment of the utility model.

[0019] The reference signs are explained as follows: 101, seat body; 102, plate cylinder; 103, air expansion shaft; 104, plate sleeve; 105, air support shaft; 106, first plug; 107, telescopic cylinder; 108, guide seat; 109, guide rail; 110, telescopic shaft; 111, second plug; 112, anilox roller. EMBODIMENT

[0020] The utility model will be further described below in combination with the drawings and specific embodiments.

[0021] As Figure 1 , Figure 2 shown, the embodiment discloses a sleeve unit soft printing plate mechanism, which comprises a seat body 101, an printing plate cylinder 102 and a anilox roller ink transfer system installed on the seat body 101. The printing plate cylinder 102 is composed of an air expansion shaft 103 and a printing plate sleeve 104 sleeved thereon. One end of the air expansion shaft 103 is assembled with an air support shaft 105, the air support shaft 105 is connected with an air pump through a hole, and is rotatably supported on the seat body 101 through a bearing. A first plug 106 is arranged at the end of the air expansion shaft 103, and can be inserted into a groove at the corresponding end of the printing plate cylinder 102 to form an air passage fixing. The other end of the air expansion shaft 103 is provided with a telescopic rotating shaft 110, the rotating shaft 110 is installed on a guide seat 108 through a bearing, the guide seat 108 slides along a guide rail 109 fixed on the seat body 101, and is driven by a piston rod of a telescopic cylinder 107. A second plug 111 is arranged at the end of the rotating shaft 110, and can be inserted into a groove at the other end of the air expansion shaft 103. When changing the plate, the telescopic cylinder 107 pulls the guide seat 108 to make the rotating shaft 110 retract and disengage from the cylinder 102, at this time, the printing plate cylinder 102 can be manually supported or lifted by a crane, and then moved along the axial direction. When installing the plate, the printing plate cylinder 102 is moved to between the air support shaft 105 and the rotating shaft 110, the telescopic cylinder 107 pushes the guide seat 108 to make the rotating shaft 110 press the cylinder 102, and the second plug 111 and the first plug 106 enter the corresponding grooves respectively to complete positioning and air passage locking.

[0022] The anilox roller ink transfer system comprises an anilox roller 112, a doctor blade and an ink tank 114. The surface of the anilox roller 112 is engraved with dense mesh holes, which quantitatively take ink from the ink tank 114 and transfer to the surface of the printing plate sleeve 104; the doctor blade closely contacts the surface of the anilox roller 112 to remove excess ink, and only the ink in the mesh holes is reserved; the anilox roller 112 and the printing plate cylinder 102 keep a very small contact pressure, which not only ensures effective ink transfer, but also avoids damage to the mesh holes or the printing plate. Bearings are arranged at the mounting positions of the air support shaft 105 and the rotating shaft 110 respectively to ensure smooth operation.

[0023] The above structure realizes quick replacement and accurate positioning of the printing plate cylinder, ensures stable operation of the anilox roller ink transfer system, and significantly improves the efficiency and quality of the soft printing plate process.

Claims

1. A sleeve unit flexographic printing form cylinder comprising a body (101) having mounted thereon a form cylinder (102) and an anilox inking system, characterized in that: The plate cylinder (102) comprises a gas expansion shaft (103) and a plate sleeve (104) sleeved thereon; one end of the gas expansion shaft (103) is provided with a gas support shaft (105), the middle hole of the gas support shaft (105) is communicated with a gas pump and is rotatably installed on a seat body (101) through a bearing, and the end thereof is provided with a first plug (106) which can be inserted into a groove at the corresponding end of the plate cylinder (102); the other end of the gas expansion shaft (103) is provided with an extensible rotating shaft (110), the rotating shaft (110) is installed on a guide seat (108) through a bearing, the guide seat (108) can slide along a guide rail (109) fixed on the seat body (101) and is driven by an extensible gas cylinder (107); the end of the rotating shaft (110) is provided with a second plug (111) which can be inserted into the groove at the other end of the gas expansion shaft (103); the anilox roller ink transmission system comprises an anilox roller (112), an ink scraping knife and a controllable contact pressure structure between the anilox roller (112) and the plate cylinder (102).

2. The sleeve gang flexographic printing form according to claim 1, characterized in that: When the plugs of the gas support shaft (105) and the rotating shaft (110) are inserted into the groove of the plate cylinder (102), the gas inside the gas expansion shaft (103) is communicated to make the plate sleeve (104) expand and be fixed.

3. The sleeve gang flexographic printing form according to claim 1, characterized in that: The piston rod of the extensible gas cylinder (107) is connected with the guide seat (108) and is used to drive the guide seat (108) to move along the guide rail (109), so that the extension and retraction of the rotating shaft (110) are realized.

4. The sleeve gang pad printing press of claim 1, wherein: The surface of the anilox roller (112) is provided with dense mesh holes, which are used to quantitatively take ink from an ink tank (114) and transfer the ink to the plate sleeve (104).

5. The sleeve gang pad printing press mechanism of claim 1, wherein: The ink scraping knife is close to the surface of the anilox roller (112) and is used to scrape off the excess ink on the surface of the anilox roller (112) and only keep the ink in the mesh holes.

6. The sleeve gang pad printing press of claim 1, wherein: The contact pressure between the anilox roller (112) and the plate cylinder (102) is kept as a small value, so as to prevent the ink in the mesh holes from being squeezed and damaged and the plate from being damaged.

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