A seamless docking flexographic printer

Abstract

The utility model discloses a kind of seamless butt joint soft printing exposure machine, relate to soft printing exposure machine technical field, including cabinet, the lid plate is hinged in the cabinet top side, the second sealing strip is fixedly installed in the cabinet top around, the second sealing strip of adjacent head-to-tail fixed connection, the first sealing strip is fixedly installed in the lid plate bottom around, the first sealing strip of adjacent head-to-tail fixed connection, the first sealing strip and second sealing strip are all rectangular and form mouth character shape by surrounding splicing;The utility model is by setting the double sealing design of the V-shaped nested type of first sealing strip and second sealing strip, when forming three-dimensional surrounding light blocking layer when lid plate and cabinet close, and utilize negative pressure self-tight effect to make two layers of sealing strip closely adhere, block ultraviolet from film edge oblique incidence into graphic area, avoid the problem of graphic definition drop caused by abnormal exposure of dot edge, improve printing plate imaging precision.

Description

Technical Field

[0001] The utility model relates to the technical field of flexographic plate-making machines, and specifically relates to a seamless docking flexographic plate-making machine. Background Technique

[0002] In the pre-press plate-making link of the printing industry, a plate-making machine is mainly a contact exposure imaging device used to make printing plates (PS plates, screen plates, etc.). Through photochemical reactions, the images on the original plates are accurately printed on the photosensitive plates, and are widely used in the production of high-quality screen plates, copper-zinc plates, resin plates, and PS plates in the special color printing industry.

[0003] However, the traditional plate-making machine still has some disadvantages in actual use: during the process of fitting the film and the PS plate, due to the design defect of the sealing structure, there are often problems of edge air leakage and light penetration. When the operator stacks the film and the PS plate in the plate-making machine for vacuum exposure, during the use of the conventional single-layer sealing strip, light is easily introduced from the edge of the sealing strip, resulting in the ultraviolet light obliquely irradiating from the edge of the blank area of the film to the lower part of the graphic part, causing abnormal exposure at the edge of the dot, and the clarity of the graphic edge decreases, affecting the color reproduction and detail performance of the printed matter.

[0004] Therefore, we designed a seamless docking flexographic plate-making machine to solve the above problems. Content of the Utility Model

[0005] The purpose of the utility model is to provide a seamless docking flexographic plate-making machine to solve the problems raised in the above background technique.

[0006] To solve the above technical problems, a seamless docking flexographic plate-making machine provided by the utility model includes a machine case. One side of the top of the machine case is hinged with a cover plate. Four sides around the top of the machine case are fixedly installed with second sealing strips, and the adjacent second sealing strips are fixedly connected end to end. Four sides around the bottom of the cover plate are fixedly installed with first sealing strips, and the adjacent first sealing strips are fixedly connected end to end. The first sealing strip and the second sealing strip are both rectangularly surrounded and spliced to form a square shape. The cross-sections of the first sealing strip and the second sealing strip are both V-shaped, and the openings of the first sealing strip and the second sealing strip are opposite. A printing frame is arranged at the center of the top of the machine case, and a glass transparent plate is fixedly connected to the top of the printing frame.

[0007] Further, an inner cavity is opened inside the machine case, a lamp is installed at the bottom of the inner cavity, and the printing frame is fixedly installed at the top of the inner cavity. [[ID=​​​​Furthermore, the outer side of the chassis is fixedly connected with symmetrically arranged latches, and the cover plate is fixedly connected with a clamp that cooperates with the latches on the same side.

[0010] Furthermore, the first sealing strip is made of silicone rubber, the second sealing strip is made of polyurethane, and the hardness of the second sealing strip is greater than that of the first sealing strip.

[0011] Furthermore, the first sealing strip is located outside the second sealing strip.

[0012] Furthermore, the opening of the first sealing strip faces downwards, while the opening of the second sealing strip faces upwards.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] 1. By setting a V-shaped nested double sealing design with the first and second sealing strips, a three-dimensional light-blocking layer is formed when the cover plate and the machine are closed. The negative pressure self-tightening effect makes the two sealing strips fit tightly together, blocking ultraviolet rays from obliquely entering the image area from the edge of the film, avoiding the problem of reduced image clarity caused by abnormal exposure at the dot edge, and improving the imaging accuracy of the printing plate.

[0015] 2. By setting the opening of the first sealing strip downward and the opening of the second sealing strip upward, if light enters obliquely from the outer gap, it will first encounter the V-shaped slope of the first sealing strip, and part of the light will be blocked by the slope. When the unblocked light continues to propagate inward, it will encounter the V-shaped slope of the second sealing strip and be reflected or blocked again, thereby reducing the possibility of light penetration. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of this utility model;

[0017] Figure 2 This utility model Figure 1 Enlarged view of point A in the middle;

[0018] Figure 3 This is a partial structural schematic diagram of the first and second sealing strips of this utility model;

[0019] Figure 4 This is a schematic diagram of the internal structure of the chassis of this utility model.

[0020] In the diagram: 1. Chassis; 2. Cover plate; 3. Clamp; 4. Lock; 5. Second sealing strip; 6. Sunshade frame; 7. First sealing strip; 8. Positioning seat; 9. Glass panel; 10. Light fixture; 11. Inner cavity. Detailed Implementation

[0021] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0022] Please refer to Figures 1-4 , the present invention provides a technical solution: a seamless docking flexographic platemaking machine, including a chassis 1. The chassis 1 is externally connected to a vacuum pump through an air extraction interface for air extraction. One side of the top of the chassis 1 is hinged with a cover plate 2. Four sides around the top of the chassis 1 are fixedly installed with second sealing strips 5, and the adjacent second sealing strips 5 are fixedly connected end to end. Four sides around the bottom of the cover plate 2 are fixedly installed with first sealing strips 7, and the adjacent first sealing strips 7 are fixedly connected end to end. The first sealing strip 7 and the second sealing strip 5 are both spliced in a rectangular shape to form a square shape. The cross-sections of the first sealing strip 7 and the second sealing strip 5 are both V-shaped, and the openings of the first sealing strip 7 and the second sealing strip 5 are opposite. When the chassis 1 and the cover plate 2 are closed, the first sealing strip 7 is located outside the second sealing strip 5, and the two are in a nested fit. A platemaking frame 6 is provided at the center of the top of the chassis 1, and a glass transparent plate 9 is fixedly connected to the top of the platemaking frame 6.

[0023] During specific implementation, the PS plate to be exposed is placed flat on the glass transparent plate 9, and after aligning and covering the film on the surface of the PS plate, the cover plate 2 is closed, so that the first sealing strip 7 is pressed against the top of the chassis 1, and the second sealing strip 5 is pressed against the bottom of the cover plate 2, forming a double light blocking layer. Then, the vacuum pump can be used to extract air from the sealed space formed by the first sealing strip 7 and the second sealing strip 5. Due to the special nested structure of the V-shaped sealing strip, a self-tightening effect is generated under the negative pressure, further enhancing the sealing performance. A vacuum environment is formed inside the platemaking frame 6, so that the air between the film and the PS plate is completely exhausted, achieving a gapless and complete fit, and preventing external light from obliquely entering the graphic area due to poor sealing.

[0024] Refer to Figure 4 As shown, an inner cavity 11 is opened inside the chassis 1, a lamp 10 is installed at the bottom of the inner cavity 11, the platemaking frame 6 is fixedly installed at the top of the inner cavity 11, and the lamp 10 emits ultraviolet light or light of a specific wavelength, which passes through the glass transparent plate 9 and irradiates the surface of the PS plate to complete the exposure process of the photosensitive material.

[0025] Refer to Figure 3The ends of the second sealing strip 5 and the first sealing strip 7 that are far apart from each other are fixedly connected to positioning seats 8 to enhance their connection strength. The first sealing strip 7 is made of silicone rubber, and the second sealing strip 5 is made of polyurethane. The hardness of the second sealing strip 5 is greater than that of the first sealing strip 7. When the chassis 1 and the cover plate 2 are closed, the first sealing strip 7 undergoes initial deformation to achieve the first level of sealing, and the second sealing strip 5 abuts against the bottom of the cover plate 2 to form a rigid support for the second level of sealing.

[0026] See Figure 1 The outer side of the chassis 1 is fixedly connected with symmetrically arranged latches 4, and the cover plate 2 is fixedly connected with clamps 3 that cooperate with the latches 4 on the same side. The cover plate 2 is mechanically locked to ensure that it fits tightly with the chassis 1, preventing the cover plate 2 from being opened accidentally.

[0027] See Figure 3 The opening of the first sealing strip 7 faces downwards, and the opening of the second sealing strip 5 faces upwards. If light enters obliquely from the outer gap, it will first encounter the V-shaped slope of the first sealing strip 7. Some of the light will be blocked by the slope. When the unblocked light continues to propagate inwards, it will encounter the V-shaped slope of the second sealing strip 5 and be reflected or blocked again, thereby reducing the possibility of light penetration.

[0028] Working principle:

[0029] The PS plate to be exposed is placed flat on the glass plate 9 of the exposure frame 6. The film is aligned and covered on the surface of the PS plate. The cover plate 2 is closed, pressing the first sealing strip 7 against the top of the chassis 1 and the second sealing strip 5 against the bottom of the cover plate 2, forming a double seal. The downward opening of the first sealing strip 7 and the upward opening of the second sealing strip 5 form a light-blocking layer, and the oblique light is attenuated by multiple reflections through the V-shaped inclined surface. The mechanical locking of the latch 4 and the clamp 3 is operated to secure the cover plate 2 to the chassis 1. The vacuum pump is started to evacuate the sealed space through the air extraction port. The silicone rubber material of the first sealing strip 7 undergoes initial deformation to achieve a primary seal, and the polyurethane material of the second sealing strip 5 provides rigid support. Under the action of negative pressure, the V-shaped nested structure generates a self-tightening effect. The ultraviolet rays emitted by the lamp 10 pass through the glass plate 9 to irradiate the PS plate to complete the exposure. After the exposure is completed, the vacuum is released, the latch 4 and the clamp 3 are unlocked, and the cover plate 2 is opened to remove the PS plate.

[0030] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the content of this utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A seamless flexographic printing plate-making machine, comprising a chassis (1), characterized in that, A cover plate (2) is hinged to one side of the top of the chassis (1). A second sealing strip (5) is fixedly installed around the top of the chassis (1). Adjacent second sealing strips (5) are fixedly connected end to end. A first sealing strip (7) is fixedly installed around the bottom of the cover plate (2). Adjacent first sealing strips (7) are fixedly connected end to end. The first sealing strip (7) and the second sealing strip (5) are both rectangular and spliced ​​together to form a square shape. The cross-section of the first sealing strip (7) and the second sealing strip (5) is V-shaped. The openings of the first sealing strip (7) and the second sealing strip (5) are opposite. A sunshade frame (6) is provided at the center of the top of the chassis (1). A glass transparent plate (9) is fixedly connected to the top of the sunshade frame (6).

2. The seamless flexographic printing plate-making machine as described in claim 1, characterized in that: The chassis (1) has an inner cavity (11) inside, and a lamp (10) is installed at the bottom of the inner cavity (11). The drying frame (6) is fixedly installed at the top of the inner cavity (11).

3. The seamless flexographic printing plate-making machine as described in claim 1, characterized in that: The ends of the second sealing strip (5) and the first sealing strip (7) that are far apart from each other are fixedly connected to positioning seats (8).

4. The seamless flexographic printing plate-making machine as described in claim 1, characterized in that: The outer side of the chassis (1) is fixedly connected with symmetrically arranged latches (4), and the cover plate (2) is fixedly connected with clamps (3) that cooperate with the latches (4) on the same side.

5. A seamless flexographic printing plate-making machine as described in claim 3, characterized in that: The first sealing strip (7) is made of silicone rubber, and the second sealing strip (5) is made of polyurethane. The hardness of the second sealing strip (5) is greater than that of the first sealing strip (7).

6. The seamless flexographic printing plate-making machine as described in claim 5, characterized in that: The first sealing strip (7) is located outside the second sealing strip (5).

7. A seamless flexographic printing plate-making machine as described in claim 6, characterized in that: The opening of the first sealing strip (7) faces downward, and the opening of the second sealing strip (5) faces upward.

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