A portable high-speed high-stability CTP plate coating device

Abstract

This utility model provides a portable, high-speed, high-pressure-stability CTP plate coating device, including a negative pressure chamber, an extrusion nozzle, and a support. A linear guide rail I is mounted on the support, and an extrusion nozzle platform is mounted on the linear guide rail I. The extrusion nozzle is mounted on the extrusion nozzle platform. A support frame is fixedly connected to the side of the support, and the support frame is equipped with a linear guide rail II. A connecting plate is mounted on the linear guide rail II, and the negative pressure chamber is fixed to the connecting plate. The bottom support of the negative pressure chamber uses linear guide rail II, which ensures that the gap between the upper end of the negative pressure chamber and the coating roller remains stable and uniform.

Description

Technical Field

[0001] This utility model belongs to the technical field of film processing equipment, specifically relating to a portable high-speed, high-voltage CTP plate coating device. Background Technology

[0002] Among commonly used coating methods such as smooth roller coating, anilox roller coating, and slit coating, only slit coating can meet production speed requirements of over 30 meters per minute. In recent years, with the dramatic increase in cost pressure and the printing market's higher requirements for CTP plate quality and the pursuit of cost-effectiveness, CTP plate manufacturers have been constantly trying to find ways to increase production speed.

[0003] However, domestic coating equipment generally suffers from two prominent problems: material leakage and air leakage. When used at speeds exceeding 40 meters per minute, it easily causes surface defects such as horizontal streaks, white edges, light-colored spots, and blue spots, severely restricting the stability of CTP plate product quality.

[0004] In addition, the air intake volume is large when the negative pressure chamber is close to the air extraction port and small when it is far away from the air extraction port, which affects the stability of the negative pressure to a certain extent.

[0005] In the existing technology CN2854648Y, the negative pressure chamber is fixed on the support of the extrusion nozzle, and the lower part of the negative pressure chamber is supported by a bearing and moves together with the extrusion nozzle. However, if the plate base touches the negative pressure chamber, the stability of the gap between the back baffle of the negative pressure chamber and the coating roller will be affected. Utility Model Content

[0006] To solve the above problems, this utility model provides a movable high-speed, high-pressure CTP plate coating device. The bottom support of the negative pressure chamber adopts a linear guide rail II, which can ensure that the gap between the upper end of the negative pressure chamber and the coating roller remains stable and uniform.

[0007] The technical solution of this utility model is as follows: a portable high-speed, high-pressure stable CTP plate coating device, including a negative pressure chamber, an extrusion nozzle, and a bracket. A linear guide rail I is provided on the bracket, and an extrusion nozzle platform is provided on the linear guide rail I. The extrusion nozzle is set on the extrusion nozzle platform. A support frame is fixedly connected to the side of the bracket. A linear guide rail II is provided on the support frame, and a connecting plate is provided on the linear guide rail II. The negative pressure chamber is fixed on the connecting plate.

[0008] The negative pressure chamber includes a front plate, a rear plate, a bottom plate, and a side plate that are sealed together. The part of the negative pressure chamber furthest from the extrusion nozzle platform is the rear plate, and the part closest to the extrusion nozzle platform is the front plate. Extrusion nozzle end plates are fixedly connected to both sides of the extrusion nozzle, and a sealing gasket is provided between the extrusion nozzle end plate and the side of the extrusion nozzle. An arc-shaped side baffle is provided at the upper end of the side plate of the negative pressure chamber, and the curvature of the upper end of the arc-shaped side baffle is adapted to the coating roller. A rear baffle is provided at the upper end of the rear plate of the negative pressure chamber. The upper end of the front plate of the negative pressure chamber is sealed to the lower end face of the extrusion nozzle platform. At the same time, the arc-shaped side baffle is sealed to the extrusion nozzle platform and the extrusion nozzle end plate respectively.

[0009] The upper end of the front plate of the negative pressure chamber is sealed to the lower end face of the extrusion nozzle platform: the lower end face of the extrusion nozzle platform is provided with a groove I that is adapted to the upper end of the front plate of the negative pressure chamber, and a groove II is provided on the side of the upper end of the front plate of the negative pressure chamber near the coating roller. Hollow rubber tubes I are provided in the groove II. The number of hollow rubber tubes I is preferably greater than or equal to 1, and the diameter of the hollow rubber tubes I is greater than the depth of the groove II.

[0010] The lower end of the extrusion nozzle platform is provided with a positioning strip, and the upper side of the front plate is provided with a protrusion adapted to the positioning strip. The positioning strip and the lower end of the extrusion nozzle platform are provided with threaded holes. The positioning strip and the extrusion nozzle platform are connected by screw I. The positioning strip is pressed on the lower end of the protrusion. Then screw I is tightened to make the extrusion nozzle platform and the front plate of the negative pressure chamber sealed together.

[0011] The upper end of the negative pressure chamber side plate is sealed to the arc-shaped side baffle: the upper end of the negative pressure chamber side plate is provided with a trapezoidal protrusion, the arc-shaped side baffle is provided with a receiving cavity adapted to the trapezoidal protrusion, and the arc-shaped side baffle and the trapezoidal protrusion are also provided with screw holes, and the negative pressure chamber side plate and the side baffle are fixed together by screw III.

[0012] The arc-shaped side baffle and the extrusion nozzle platform are sealed together: the arc-shaped side baffle and the extrusion nozzle platform are provided with corresponding screw holes, and the extrusion nozzle platform and the arc-shaped side baffle are fixed together by screw II; the arc-shaped side baffle is provided with a trapezoidal groove, and a trapezoidal sealing strip is provided in the trapezoidal groove. When the extrusion nozzle platform and the arc-shaped side baffle are fixed together by screw II, the trapezoidal sealing strip seals the connection between the arc-shaped side baffle and the extrusion nozzle platform.

[0013] Sealing connection between the extrusion nozzle end plate and the arc-shaped side baffle: The extrusion nozzle end plate is adapted to the shape of the extrusion nozzle and has a protrusion adapted to the lip of the extrusion nozzle. The upper end of the arc-shaped side baffle near the extrusion nozzle end plate is adapted to the lower surface of the protrusion of the extrusion nozzle end plate. When screw II fixes the extrusion nozzle base and the arc-shaped side baffle together, the trapezoidal sealing strip seals the connection between the arc-shaped side baffle and the extrusion nozzle end plate.

[0014] An extension is provided on the outer side of the extrusion nozzle end plate, and the extension is in close contact with the side baffle.

[0015] The upper end of the rear plate of the negative pressure chamber is hermetically connected to the rear baffle: The rear baffle is located outside the rear plate. Both are flat plates. They are in contact through a precision-machined plane and are fixed and sealed by screws.

[0016] The extrusion nozzle is in sealing contact with the extrusion nozzle pedestal in the length direction of the front plate of the negative pressure chamber: At one end close to the coating roller, a right-angled trapezoidal boss is provided on the extrusion nozzle pedestal. The side of the trapezoidal boss with an inclined surface is close to the coating roller. A trapezoidal groove adapted to the right-angled trapezoidal boss is provided on the extrusion nozzle. A groove III is provided at the upper end of the right-angled trapezoidal boss. A hollow rubber tube II is provided in the groove III. The number of hollow rubber tubes II is preferably greater than or equal to [number not provided]. The diameter of the hollow rubber tube II is greater than the depth of the groove III.

[0017] Two trapezoidal grooves are provided on the arc-shaped side baffle. Trapezoidal sealing strips I and trapezoidal sealing strips II are respectively provided in the trapezoidal grooves. The large-head ends and small-head ends of the trapezoidal sealing strips I and trapezoidal sealing strips II are opposite.

[0018] The diameter of the hollow rubber tube I is greater than the depth of the groove II, and the exceeded depth is 1.3 - 1.7 mm; the diameter of the hollow rubber tube II is greater than the depth of the groove III, and the exceeded depth is 1.3 - 1.7 mm.

[0019] A second seal is added outside the arc-shaped side baffle, that is, a horizontal side strip. The horizontal side strip is connected to the side plate by screws, and a groove for installing a sealing strip is provided in the horizontal side strip, and a [shape not provided] sealing strip is provided; The front plate is higher than the side plate in height. A vertical side strip is added outside the connection of the arc-shaped side baffle and the front plate. A groove for installing a sealing strip is provided in the vertical side strip, and a [shape not provided] sealing strip is provided.

[0020] At least two grooves are provided on the upper ends of the arc-shaped side baffle and the rear baffle respectively.

[0021] A discharge port is provided on the bottom surface of the negative pressure chamber. The discharge port is provided at one end close to the side plate. The bottom surface of the negative pressure chamber is in an arc-shaped inclined surface shape. It is an arc with a gradually decreasing height from near the front plate and the rear plate to the center of the bottom surface, and an inclined surface with a gradually increasing height from near the discharge port to away from the discharge port.

[0022] A suction hose is connected to the exhaust port of the negative pressure chamber. A flow equalization hood is provided in front of the exhaust port of the negative pressure chamber. The flow equalization hood includes baffle I and baffle II, which are fixedly connected to the negative pressure chamber. Baffle I includes a downwardly inclined plate I, a vertical plate I, a downwardly inclined plate II, and a vertical plate II. One end of inclined plate I is fixedly connected to the negative pressure chamber, and the other end is fixedly connected to the end of vertical plate I. One end of inclined plate II is fixedly connected to the other end of vertical plate I, and the other end is fixedly connected to the end of vertical plate II. Baffle II includes an upwardly inclined plate III and a vertical plate III. One end of inclined plate III is fixedly connected to the negative pressure chamber, and the other end is fixedly connected to the end of vertical plate III. This forms a narrow slit between vertical plate II and vertical plate III. A trapezoidal buffer chamber I is formed between inclined plate II, inclined plate I, vertical plate I, and vertical plate III. A trapezoidal buffer chamber II is formed between inclined plate I, inclined plate III, vertical plate III, and the negative pressure chamber. A connection port connecting trapezoidal buffer chamber I and trapezoidal buffer chamber II is provided on vertical plate III.

[0023] On the side of the right-angled trapezoidal boss with an inclined surface, there is a certain gap between the right-angled trapezoidal boss and the extrusion nozzle. A clamping device is provided at the end of the extrusion nozzle away from the coating roller to press the inclined side of the right-angled trapezoidal boss of the extrusion nozzle against the extrusion nozzle.

[0024] A moving adjustment mechanism is provided on one side of the extrusion nozzle platform to push the extrusion nozzle platform to move horizontally on the linear guide rail I;

[0025] An adjusting shim is provided between the linear guide rail I and the extrusion nozzle platform;

[0026] The extrusion nozzle platform is fixedly connected to the moving element of the linear guide I by bolt I. A positioning block is provided on the side of the extrusion nozzle platform. The positioning block and the moving element are provided with screw holes. Bolt II passes through the corresponding screw holes on the positioning block and the moving element. Tightening bolt II will fix the side of the extrusion nozzle platform.

[0027] The beneficial effects of this utility model are that it provides a movable high-speed, high-pressure CTP plate coating device. The bottom support of the negative pressure chamber adopts a linear guide rail II, which can ensure that the gap between the upper end of the negative pressure chamber and the coating roller remains stable and uniform. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the structure of this utility model.

[0029] Figure 2 This is a side view of the structure of this utility model.

[0030] Figure 3 This is a schematic diagram illustrating the requirements for the rear baffle and curved side baffle of the negative pressure chamber at high vehicle speeds of 40 m / min and above.

[0031] Figure 4Figure 1 shows a schematic diagram of the sealing structure of the arc-shaped side baffle 21, the rear baffle 20, and the connecting parts of the negative pressure chamber. Figure 2 shows the seal between the extrusion nozzle and the extrusion nozzle platform at point A in Figure F. Figure 3 shows the seal between the extrusion nozzle platform and the front plate of the negative pressure chamber at point B in Figure F. Figure 4 shows the seal between the extrusion nozzle end plate and the arc-shaped side baffle at point C in Figure F. Figure 5 shows the seal between the extrusion nozzle platform and the arc-shaped side baffle at point D in Figure F. Figure 6 shows the seal between the negative pressure chamber side plate and the arc-shaped side baffle at point E in Figure F.

[0032] Figure 5 This is a schematic diagram of the connection structure between the horizontal and vertical side guards.

[0033] Figure 6 This is a schematic diagram of the flow equalization shield.

[0034] Figure 7 A schematic diagram of the structure of the negative pressure cavity support, wherein Figure B is a schematic diagram of the AA section structure in Figure A.

[0035] Figure 8 The following are schematic diagrams comparing the air extraction effects. Figure A shows the air extraction effect of this application with the narrow slit, and Figure B shows the air extraction effect without the narrow slit.

[0036] Figure 9 This is an exploded structural diagram of the main components of this utility model.

[0037] Reference numerals: 1 Aluminum plate base, 2 Coating roller, 3 Extrusion nozzle, 31 Lip, 4 Sealing gasket, 5 Extrusion nozzle end plate, 50 Extension, 51 Protrusion, 6 Extrusion nozzle base, Right-angled trapezoidal boss 60, 7 Handwheel I / Handwheel screw, 8 Positioning block, 9 Adjusting shim, 10 Linear guide rail I, Moving element 100, 11 Bracket, 12 Positioning pressure strip, 13 Support plate, 131 Adjusting screw, 14 Negative pressure chamber, 140 Front plate, 141 Protrusion, 142 Horizontal side baffle, 143 Vertical side baffle, 144 Discharge port, 145 O-ring seal, 146 9-shaped sealing strip, 15 Support frame, 16 Linear guide rail II, 17 Connecting plate, 18 Flow equalization hood, 180 baffle I, 181 baffle II, 182 inclined plate I, 183 vertical plate I, II, 184 inclined plate, 185 vertical plate II, 186 inclined plate III, 187 vertical plate III, narrow strip slit, 188, 189 trapezoidal buffer chamber I, 190 trapezoidal buffer chamber II, 191 connection port, 19 exhaust hose, 20 rear baffle, 21 arc-shaped side baffle, 22 moving adjustment mechanism, 23 rubber hose I, 24 rubber hose II, 25 screw I, 26 trapezoidal sealing strip I, 27 trapezoidal sealing strip II, 28 screw II, 29 screw III, 30 trapezoidal protrusion, 33 groove. Detailed Implementation

[0038] The technical solution of this utility model will be clearly and completely described below with reference to the accompanying drawings and specific embodiments. It should be understood that the preferred embodiments described herein are only for illustration and explanation of this utility model and should not be construed as limiting the scope of protection of this utility model. Those skilled in the art can make some non-essential improvements and adjustments based on the content of this utility model below. In this utility model, unless otherwise expressly specified and limited, the technical terms used in this application should have the ordinary meaning understood by those skilled in the art.

[0039] like Figures 1-9 As shown, a portable high-speed, high-pressure CTP plate coating device includes a negative pressure chamber 14, an extrusion nozzle 3, and a bracket 11. A linear guide rail I10 is provided on the bracket 11, and an extrusion nozzle platform 6 is provided on the linear guide rail I. The extrusion nozzle 3 is disposed on the extrusion nozzle platform 6. A support frame 15 is fixedly connected to the side of the bracket 11. The support frame 15 is provided with a linear guide rail II16, and a connecting plate 17 is provided on the linear guide rail II16. The negative pressure chamber 14 is fixed on the connecting plate 17.

[0040] The bottom support of the negative pressure chamber 14 adopts linear guide rail II, which can ensure that the gap between the upper end of the negative pressure chamber and the coating roller remains stable and uniform, as well as the gap between the upper side baffle of the negative pressure chamber and the coating roller, and the gap between the rear baffle and the coating roller.

[0041] The support frame 15 can be fixedly connected to the bracket 11 by bolts via the support plate 13. The support frame 15 and the support plate 13 are connected by bolts, and the support plate 13 is also provided with an adjusting screw 131 for finely adjusting the height of the support frame 15.

[0042] The extrusion nozzle 3 is fixedly connected to the end plates of the extrusion nozzle on both sides, such as Figure 9 It can be connected by screws; a sealing gasket is provided between the end plate of the extrusion nozzle and the side of the extrusion nozzle 3 to seal the side of the extrusion nozzle 3.

[0043] An adjusting shim 4 is provided between the linear guide rail I and the extrusion nozzle platform 6, thereby allowing the height of the extrusion nozzle platform 6 to be adjusted. The linear guide rail I and the extrusion nozzle platform 6 can be fixed together with screws.

[0044] The extrusion nozzle platform 6 is fixedly connected to the moving element 100 of the linear guide rail I10 by bolt I. A positioning block 8 is provided on the side of the extrusion nozzle platform 6. The positioning block 8 and the moving element 100 have threaded holes. Bolt II passes through the corresponding threaded holes on the positioning block and the moving element. Tightening bolt II fixes the side of the extrusion nozzle platform 6. Because the distance between the substrate and the lip 31 of the extrusion nozzle is small, gaps between bolt I and the threaded holes through which bolt I passes are prevented from affecting the coating of the substrate.

[0045] The negative pressure chamber 14 comprises a front plate, a rear plate, a bottom plate, and side plates, which are fixed together with screws, and all seams on the inner surfaces are sealed by welding. The rear plate is located away from the extrusion nozzle platform, while the front plate 140 is located closer to the extrusion nozzle platform. For ease of support, the negative pressure chamber can be made of stainless steel.

[0046] To prevent the upper end of the negative pressure chamber 14 from accidentally touching the base plate 1 on the coating roller and damaging the base plate 1, the upper end of the side plate of the negative pressure chamber 14 is provided with a sealed arc-shaped side baffle 21. The upper end arc of the arc-shaped side baffle is adapted to the coating roller. The upper end of the rear plate of the negative pressure chamber 14 is provided with a sealed rear baffle 20. The upper end of the front plate 140 of the negative pressure chamber 14 is sealed to the lower end face of the extrusion nozzle platform. At the same time, the arc-shaped side baffle 21 is also sealed to the extrusion nozzle platform and the extrusion nozzle end plate 5.

[0047] The curved side baffle 21 and rear baffle 20 can be made of polypropylene. For example... Figure 3 As shown, the distance between the arc-shaped side baffle 21 and the coating roller 2 is 0.15-0.4mm, and the distance between the rear baffle 20 and the coating roller 2 is 0.5-0.6mm. The uniformity is 0.05, and the base thickness is 0.10-0.35mm. The distances are very small, and the base width corresponds to the extrusion nozzle. Therefore, the arc-shaped side baffle 21 and the coating roller 2 do not pass through the base. Due to the small distances between the arc-shaped side baffle 21, the rear baffle 20, and the coating roller 2, using a stainless steel negative pressure chamber directly close to the coating roller can easily damage the coating roller or the base.

[0048] The upper end of the front plate 140 of the negative pressure chamber 14 is sealed to the lower end face of the extrusion nozzle platform: the lower end face of the extrusion nozzle platform is provided with a groove I that is adapted to the upper end of the front plate 140 of the negative pressure chamber 14, and a groove II is provided on the side of the upper end of the front plate 140 of the negative pressure chamber 14 near the coating roller. A hollow rubber tube I24 is provided in the groove II. The number of hollow rubber tubes I24 is preferably greater than or equal to 2. The diameter of the hollow rubber tube I is greater than the depth of the groove II, and the greater depth is 1.3-1.7mm.

[0049] The length of the hollow rubber tube I24 is parallel to the length of the front plate of the negative pressure chamber.

[0050] like Figure 4 In Figure B, to ensure a secure connection between the front plate 140 of the negative pressure chamber 14 and the extrusion nozzle platform 6, a positioning strip 12 is provided at the lower end of the extrusion nozzle platform 6. A protrusion 141 adapted to the positioning strip 12 is provided on the upper side of the front plate 140. The positioning strip 12 and the lower end of the extrusion nozzle platform 6 are provided with threaded holes. The positioning strip 12 and the extrusion nozzle platform 6 are connected by screw I 25. The positioning strip 12 is pressed on the lower end of the protrusion 141. Then, the screw I 25 is tightened, thereby making the extrusion nozzle platform 6 and the front plate 140 of the negative pressure chamber 14 sealed together.

[0051] The upper end of the side plate of the negative pressure chamber 14 is sealed to the arc-shaped side baffle 21: as follows Figure 4 As shown in Figure E, the upper end of the negative pressure chamber side plate is provided with a trapezoidal protrusion 30, and the arc-shaped side baffle 21 is provided with a receiving cavity adapted to the trapezoidal protrusion 30. The arc-shaped side baffle 21 and the trapezoidal protrusion are also provided with screw holes, and the negative pressure chamber side plate and the side baffle 21 are fixed together by screw III29.

[0052] The arc-shaped side baffle 21 is sealed to the extrusion nozzle base 6. Figure 4 As shown in Figure D, the arc-shaped side baffle 21 and the extrusion nozzle platform are respectively provided with screw holes. The extrusion nozzle platform and the arc-shaped side baffle 21 are fixed together by screw II28. In order to seal the connection, the arc-shaped side baffle 21 is also provided with a trapezoidal groove, and a trapezoidal sealing strip is provided in the trapezoidal groove. In order to better seal, two trapezoidal grooves are provided, and trapezoidal sealing strip I26 and trapezoidal sealing strip II27 are respectively provided in the trapezoidal grooves. When the extrusion nozzle platform and the arc-shaped side baffle 21 are fixed together by screw II28, the trapezoidal sealing strip I26 and trapezoidal sealing strip II27 seal the connection between the arc-shaped side baffle 21 and the extrusion nozzle platform.

[0053] For better sealing, the large and small ends of trapezoidal sealing strip I26 are opposite to those of trapezoidal sealing strip II27.

[0054] The extrusion nozzle end plate 5 is sealed to the arc-shaped side baffle 21: (e.g.) Figure 9 The extrusion nozzle end plate 5 is adapted to the shape of the extrusion nozzle 3, and has a protrusion 51 adapted to the lip 31 of the extrusion nozzle 3. Therefore, for a good seal, such as Figure 9 and Figure 4 In Figure C, the upper end of the arc-shaped side baffle is adapted to the lower surface of the protrusion of the extrusion nozzle end plate 5 near the extrusion nozzle end plate 5. When the screw II28 fixes the extrusion nozzle platform and the arc-shaped side baffle 21 together, the trapezoidal sealing strips such as trapezoidal sealing strip I26 and trapezoidal sealing strip II27 also seal the connection between the arc-shaped side baffle 21 and the extrusion nozzle end plate 5.

[0055] To achieve a better seal, an extension 50 is provided on the outer side of the extrusion nozzle end plate. The extension 50 is in close contact with the side baffle, completely eliminating air leakage from the front side. This ensures a good seal with the extrusion nozzle end plate.

[0056] During the maintenance of the extrusion nozzle, the arc-shaped side baffle usually needs to be disassembled. Improper assembly or incomplete assembly can easily cause leakage of coating liquid and air leakage in the negative pressure chamber. In addition to adding seals to the side and bottom of the arc-shaped side baffle, this application also adds a second seal on the outside, namely a horizontal side baffle 142. The horizontal side baffle is connected to the side plate by screws, and a groove for installing a sealing strip is opened in the horizontal side baffle. A figure-9 shaped sealing strip 146 is provided, thereby making the sealing between the horizontal side baffle and the side plate reliable.

[0057] In addition, if the front panel is taller than the side panel, a vertical side baffle 143 is added to the outside of the connection between the arc-shaped side baffle and the front panel. A groove for installing a sealing strip is opened in the vertical side baffle, and a figure-9 shaped sealing strip is provided, thereby ensuring the sealing reliability of the connection between the vertical side baffle and the front panel.

[0058] The upper end of the rear plate of the negative pressure chamber 14 is sealed to the rear baffle 20: the rear baffle 20 is located on the outside of the rear plate, both are flat plates, and they are in contact through a precision-machined surface and fixed and sealed by screws. Alternatively, a sealing connection can be made similar to that between the side plate and the arc-shaped side baffle 21.

[0059] like Figure 4 In Figure A, the extrusion nozzle 3 and the extrusion nozzle base 6 are in sealed contact along the length of the front plate of the negative pressure chamber: at one end near the coating roller, the extrusion nozzle base 6 is provided with a right-angled trapezoidal boss 60. The side of the trapezoidal boss 60 with the inclined surface is close to the coating roller. The extrusion nozzle 3 is provided with a trapezoidal groove that is compatible with the right-angled trapezoidal boss 60. The upper end of the right-angled trapezoidal boss 60 is provided with a groove Ⅲ. Hollow rubber tubes II23 are provided in the groove Ⅲ. The number of hollow rubber tubes II23 is preferably greater than or equal to 2. The diameter of the hollow rubber tubes II is greater than the depth of the groove Ⅲ, and the greater depth is 1.3-1.7mm.

[0060] The length direction of the hollow rubber tube II is parallel to the length direction of the front plate of the negative pressure chamber.

[0061] Due to machining accuracy issues, there is a certain gap between the right-angled trapezoidal boss 60 and the extrusion nozzle 3 on the side with the inclined surface. Therefore, a clamping device is provided at the end of the extrusion nozzle 3 away from the coating roller to press the inclined surface of the right-angled trapezoidal boss 60 of the extrusion nozzle 3 against the extrusion nozzle 3.

[0062] The clamping device includes a protrusion I on the upper end of the extrusion nozzle base 6, a threaded hole I on the protrusion I, an adjusting bolt I inside the threaded hole I, and a handwheel I7 on the adjusting bolt I. By pressing the adjusting bolt I against the end face of the extrusion nozzle 3 away from the coating roller, and rotating the handwheel I7, the inclined side of the right-angled trapezoidal protrusion 60 of the extrusion nozzle 3 is clamped to the extrusion nozzle 3. Alternatively, the handwheel screw 7 passes through the threaded hole I and presses against the end face of the extrusion nozzle 3 away from the coating roller; by rotating the handwheel screw 7, the inclined side of the right-angled trapezoidal protrusion 60 of the extrusion nozzle 3 is clamped to the extrusion nozzle 3.

[0063] The upper ends of the arc-shaped side baffle 21 and the rear baffle 20 are respectively provided with at least two grooves 33, which serve as a buffer to reduce the intake air velocity.

[0064] A discharge port 144 is provided on the bottom surface of the negative pressure chamber, located at one end near the side plate. The bottom surface of the negative pressure chamber 14 has an arc-shaped slope, with the height gradually decreasing from near the front plate and rear plate to the center of the bottom surface, and gradually increasing from near the discharge port 144 to away from the discharge port 144. This design facilitates automatic discharge, avoids the impact of material accumulation on the stability of the negative pressure, and also eliminates sanitary dead corners, preventing the impact of coating liquid deposition or drying on the quality of the recovered coating liquid. The discharge port 144 is sealed to the negative pressure chamber by an O-ring 145.

[0065] like Figure 6 and Figure 8 As shown, a flexible exhaust hose 19 is connected to the exhaust port of the negative pressure chamber. A flow equalization hood 18 is provided in front of the exhaust port of the negative pressure chamber. The flow equalization hood 18 includes a baffle I180 and a baffle II181 fixedly connected to the negative pressure chamber. The baffle I180 includes a downwardly inclined plate I182, a vertical plate I183, a downwardly inclined plate II184, and a vertical plate II185. One end of the inclined plate I is fixedly connected to the negative pressure chamber, and the other end is fixedly connected to the end of the vertical plate I. One end of the inclined plate II is fixedly connected to the other end of the vertical plate I. The first baffle is fixedly connected to the second baffle, with the other end fixedly connected to the end of the vertical plate II. The second baffle II 181 includes an upwardly inclined plate III 186 and a vertical plate III 187. One end of the inclined plate III is fixedly connected to the negative pressure chamber, and the other end is fixedly connected to the end of the vertical plate III. This creates a narrow slit 188 between the vertical plate II and the vertical plate III, forming a trapezoidal buffer chamber I 189 between the inclined plate II, inclined plate I, vertical plate I, and vertical plate III, and a trapezoidal buffer chamber II 190 between the inclined plate I, inclined plate III, vertical plate III, and the negative pressure chamber. The vertical plate III has a connecting port 191 connecting the trapezoidal buffer chamber I 189 and the trapezoidal buffer chamber II 190. The baffles I 180 and II 181 are sealed at their ends along their length. Therefore, airflow enters the trapezoidal buffer chamber I 189 from the negative pressure chamber through the narrow slit 188, and then enters the trapezoidal buffer chamber II 190. There are at least two connecting ports 191.

[0066] The total transverse length of the flow equalization hood is generally 1500-1700mm depending on the width of the production plate. The width of the narrow strip is set to 3.5-4mm, and the depth is 12-15mm. The cross-sectional area of ​​the trapezoidal buffer cavity I189 on top is 8-10 times that of the cross-section of the narrow strip, which is equivalent to a buffer cavity. This avoids the problem that the air intake is large at the strip corresponding to the connection port 191 and small at a distance from the connection port 191 when the exhaust fan is drawing air. This allows the baffle to have more uniform air intake along the entire length direction, thereby producing a uniform and stable negative pressure effect over the entire coating width area of ​​the extrusion nozzle.

[0067] Are there comparison images of the II185 with and without the vertical panel? Figure 8 As shown.

[0068] The number of exhaust hoses in the negative pressure chamber has been reduced from 8-10 to 2, which solves the problems of too many hoses causing air leakage and poor equipment hygiene leading to surface defects such as dirt spots and blue spots on the coating.

[0069] like Figure 2 As shown, a moving adjustment mechanism 22 is provided on one side of the extrusion nozzle platform 6 to push the extrusion nozzle platform 6 to move horizontally on the linear guide rail I10. The moving adjustment mechanism includes a protrusion II provided on the upper end of the bracket 11, a threaded hole II provided on the protrusion II, an adjusting bolt II provided in the threaded hole II, and a handwheel II provided on the adjusting bolt II. By rotating the handwheel II, the extrusion nozzle platform 6 is driven to move horizontally on the linear guide rail I10.

[0070] To accommodate defects at the edge of the substrate, this invention incorporates a movable adjustment mechanism 22. A linear guide rail II16 is positioned at the bottom of the negative pressure chamber, with the linear guide rails I10 and II16 jointly supporting the extrusion nozzle 3, the extrusion nozzle platform 6, and the negative pressure chamber 14. When the extrusion nozzle is adjusted or moved, the negative pressure chamber moves synchronously, ensuring the seal between the components remains intact and maintaining a constant gap between the arc-shaped side baffle 21 and the rear baffle 20 and the coating roller 2.

[0071] The structure provided by this utility model greatly improves the stability of the coating gap and the uniformity and stability of the negative pressure in the negative pressure chamber, thereby avoiding quality defects such as coating streaks, horizontal lines, white edges, and splashes caused by poor negative pressure stability and uneven negative pressure distribution in existing coating devices.

[0072] The working process of this utility model is as follows: The exhaust fan is turned on, drawing air from the surface of the substrate 1 and the negative pressure chamber 14 through the narrow slit 188 of the flow equalization hood 18 into the inner cavity of the flow equalization hood 18, and then through the exhaust hose 19 into the exhaust fan for discharge. A uniform and stable negative pressure is generated in the area below the extrusion nozzle outlet within the negative pressure chamber, allowing the photosensitive emulsion flowing from the lip 31 of the extrusion nozzle 3 to adhere evenly to the surface of the substrate 1, which is moving at high speed on the coating roller 2. When one edge of the substrate is defective and does not require coating, or one end of the extrusion nozzle is damaged and unusable, or when the center line of the coating path is offset, the moving adjustment mechanism 22 can be used to laterally move the extrusion nozzle to meet the coating requirements, thereby improving coating stability.

[0073] This invention solves the problems of material leakage caused by poor sealing of the negative pressure chamber, as well as the problems of unstable and uneven negative pressure caused by air leakage and unstable air volume. It can also address the problem of offset of the plate center line, greatly improving the stability of high-speed CTP plate extrusion coating. It can avoid defects such as coating peeling, streaks, white edges, and drip marks caused by air leakage and material leakage in the original technology. It can meet the needs of high-speed CTP plate production of 45 meters / minute and above, thereby improving product quality and production efficiency.

[0074] The above descriptions are merely preferred embodiments of this utility model, not all embodiments. The scope of protection of this utility model is not limited thereto. The technical features of the above embodiments can be combined arbitrarily. For the sake of brevity, not all possible combinations of the technical features in the above embodiments have been described. However, as long as the combination of these technical features does not contradict each other, it should be considered within the scope of this specification. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model. It should be noted that for those skilled in the art and any person skilled in the art, any equivalent substitutions or changes made to the technical solutions and utility model concept of this utility model without departing from the overall concept and spirit of this utility model should also be considered within the scope of protection of this utility model.

Claims

1. A portable high-vehicle-speed high-stability CTP plate coating device, comprising a negative pressure cavity (14), an extrusion nozzle (3) and a support (11), characterized in that: The bracket (11) is provided with a linear guide rail I (10), and a pressing nozzle platform (6) is provided on the linear guide rail I. The pressing nozzle (3) is set on the pressing nozzle platform (6). The bracket (11) is fixedly connected to a support frame (15) on the side. The support frame (15) is provided with a linear guide rail II (16). A connecting plate (17) is provided on the linear guide rail II (16). The negative pressure chamber (14) is fixed on the connecting plate (17).

2. The portable high-vehicle-speed high-steady-pressure CTP plate coating device according to claim 1, characterized in that: The negative pressure chamber (14) includes a front plate, a rear plate, a bottom plate, and a side plate that are sealed together. The part of the negative pressure chamber (14) away from the extrusion nozzle platform is the rear plate, and the part closer to the extrusion nozzle platform is the front plate (140). The extrusion nozzle (3) is fixedly connected to the extrusion nozzle end plate on both sides. A sealing gasket (4) is provided between the extrusion nozzle end plate (5) and the side of the extrusion nozzle (3). The upper end of the side plate of the negative pressure chamber (14) is provided with a sealed arc-shaped side baffle (21). The upper end arc of the arc-shaped side baffle is adapted to the coating roller. The upper end of the rear plate of the negative pressure chamber (14) is provided with a sealed rear baffle (20). The upper end of the front plate (140) of the negative pressure chamber (14) is sealed to the lower end face of the extrusion nozzle platform. At the same time, the arc-shaped side baffle (21) is sealed to the extrusion nozzle platform and the extrusion nozzle end plate (5).

3. The portable high-vehicle-speed high-steady-pressure CTP plate coating device according to claim 2, characterized in that: The upper end of the front plate (140) of the negative pressure chamber (14) is sealed to the lower end face of the extrusion nozzle platform: the lower end face of the extrusion nozzle platform is provided with a groove I that is adapted to the upper end of the front plate (140) of the negative pressure chamber (14), and a groove II is provided on the side of the upper end of the front plate (140) of the negative pressure chamber (14) near the coating roller. A hollow rubber tube I (24) is provided in the groove II. The number of hollow rubber tubes I (24) is preferably greater than or equal to (2). The diameter of the hollow rubber tube I is greater than the depth of the groove II. The lower end of the extrusion nozzle platform (6) is provided with a positioning strip (12), and the upper side of the front plate (140) is provided with a protrusion (141) that is adapted to the positioning strip (12). The positioning strip (12) and the lower end of the extrusion nozzle platform (6) are provided with threaded holes. The positioning strip (12) and the extrusion nozzle platform (6) are connected by screw I (25). The positioning strip (12) is pressed on the lower end of the protrusion (141), and then the screw I (25) is tightened so that the extrusion nozzle platform (6) and the front plate (140) of the negative pressure chamber (14) are sealed together. The upper end of the side plate of the negative pressure chamber (14) is sealed to the arc-shaped side baffle (21): the upper end of the side plate of the negative pressure chamber is provided with a trapezoidal protrusion (30), the arc-shaped side baffle (21) is provided with a receiving cavity that is adapted to the trapezoidal protrusion (30), and the arc-shaped side baffle (21) and the trapezoidal protrusion (30) are also provided with screw holes. The side plate of the negative pressure chamber and the side baffle (21) are fixed together by screw III (29); The arc-shaped side baffle (21) is sealed to the extrusion nozzle platform: the arc-shaped side baffle (21) and the extrusion nozzle platform are provided with screw holes respectively. The extrusion nozzle platform and the arc-shaped side baffle (21) are fixed together by screw II (28); the arc-shaped side baffle (21) is provided with a trapezoidal groove, and a trapezoidal sealing strip is provided in the trapezoidal groove. When the extrusion nozzle platform and the arc-shaped side baffle (21) are fixed together by screw II (28), the trapezoidal sealing strip seals the connection between the arc-shaped side baffle (21) and the extrusion nozzle platform; The extrusion nozzle end plate and the arc-shaped side baffle (21) are sealed together: the shape of the extrusion nozzle end plate (5) is adapted to the shape of the extrusion nozzle (3), and there is a protrusion (51) adapted to the lip (31) of the extrusion nozzle (3). The upper end of the arc-shaped side baffle is adapted to the lower surface of the protrusion of the extrusion nozzle end plate (5) near the extrusion nozzle end plate (5). When the screw II (28) fixes the extrusion nozzle base and the arc-shaped side baffle (21) together, the trapezoidal sealing strip seals the connection between the arc-shaped side baffle (21) and the extrusion nozzle end plate (5). An extension (50) is provided on the outer side of the extrusion nozzle end plate, and the extension (50) is in close contact with the side baffle. The upper end of the negative pressure chamber (14) is sealed to the rear baffle (20): the rear baffle (20) is located on the outside of the rear plate. Both are flat plates. They are in contact through a precision-machined plane and are fixed and sealed by screws. The extrusion nozzle (3) and the extrusion nozzle base (6) are in sealed contact along the length of the front plate of the negative pressure chamber: At the end near the coating roller, the extrusion nozzle base (6) is provided with a right-angled trapezoidal boss (60), the side of the trapezoidal boss (60) with the inclined surface is close to the coating roller, the extrusion nozzle (3) is provided with a trapezoidal groove that is compatible with the right-angled trapezoidal boss (60), the upper end of the right-angled trapezoidal boss (60) is provided with a groove Ⅲ, and a hollow rubber tube II (23) is provided in the groove Ⅲ. The number of hollow rubber tubes II (23) is preferably greater than or equal to (2), and the diameter of the hollow rubber tube II is greater than the depth of the groove Ⅲ.

4. The portable high-vehicle-speed high-steady-pressure CTP plate coating device according to claim 3, characterized in that: The arc-shaped side baffle (21) is provided with two trapezoidal grooves, and trapezoidal sealing strip I (26) and trapezoidal sealing strip II (27) are respectively provided in the trapezoidal grooves. The large end and small end of trapezoidal sealing strip I (26) and trapezoidal sealing strip II (27) are opposite. The diameter of hollow rubber tube I is greater than the depth of groove II by 1.3-1.7 mm; the diameter of hollow rubber tube II is greater than the depth of groove III by 1.3-1.7 mm.

5. The portable high-speed, high-voltage stable CTP plate coating device according to claim 3, characterized in that: A second seal is added to the outside of the arc-shaped side baffle, namely a horizontal side baffle (143). The horizontal side baffle is connected to the side plate by screws, and a groove for installing a sealing strip is opened in the horizontal side baffle. A (9) shaped sealing strip (146) is provided. The front plate is higher than the side plate. A vertical side baffle (142) is added to the outside of the arc-shaped side baffle connected to the front plate. A groove for installing a sealing strip is opened in the vertical side baffle. A (9) shaped sealing strip is provided.

6. The portable high-vehicle-speed high-steady-pressure CTP plate coating device according to claim 1, characterized in that: The upper ends of the arc-shaped side baffle (21) and the rear baffle (20) are respectively provided with at least two grooves (25).

7. The portable high-vehicle-speed high-steady-pressure CTP plate coating device according to claim 1, characterized in that: The bottom surface of the negative pressure chamber is provided with a discharge port (144), which is located at one end near the side plate. The bottom surface of the negative pressure chamber (14) adopts an arc-shaped slope. The height of the arc gradually decreases from near the front plate and the rear plate to the center of the bottom surface, and the height of the slope gradually increases from near the discharge port (144) to away from the discharge port (144).

8. The portable high-vehicle-speed high-steady-CTP-plate coating device according to claim 1, wherein: A suction hose (19) is connected to the exhaust port of the negative pressure chamber. A flow equalization hood (18) is provided in front of the exhaust port of the negative pressure chamber. The flow equalization hood (18) includes a baffle I (180) and a baffle II (181) fixedly connected to the negative pressure chamber. The baffle I (180) includes a downwardly inclined plate I (182), a vertical plate I (183), a downwardly inclined plate II (184), and a vertical plate II (185). One end of the inclined plate I is fixedly connected to the negative pressure chamber, and the other end is fixedly connected to the end of the vertical plate I. One end of the inclined plate II is fixedly connected to the other end of the vertical plate I, and the other end is fixedly connected to the end of the vertical plate II. ; baffle II (181) includes an upwardly inclined plate III (186) and a vertical plate III (187). One end of the inclined plate III is fixedly connected to the negative pressure cavity, and the other end is fixedly connected to the end of the vertical plate III; thus, a narrow strip (188) is formed between the vertical plate II and the vertical plate III, and a trapezoidal buffer cavity I (189) is formed between the inclined plate II, the inclined plate I, the vertical plate I, and the vertical plate III, and a trapezoidal buffer cavity II (190) is formed between the inclined plate I, the inclined plate III, the vertical plate III, and the negative pressure cavity; the vertical plate III is provided with a connection port (191) connecting the trapezoidal buffer cavity I (189) and the trapezoidal buffer cavity II (190).

9. The portable high-speed, high-voltage stable CTP plate coating device according to claim 3, characterized in that: On the side of the right-angled trapezoidal boss (60) with an inclined surface, there is a certain gap between the right-angled trapezoidal boss (60) and the extrusion nozzle (3). A pressing device is provided at the end of the extrusion nozzle (3) away from the coating roller to press the inclined side of the right-angled trapezoidal boss (60) of the extrusion nozzle (3) against the extrusion nozzle (3).

10. The portable high-vehicle-speed high-steady-pressure CTP plate coating device according to claim 1, characterized in that: A moving adjustment mechanism (22) is provided on one side of the extrusion nozzle platform (6) to push the extrusion nozzle platform (6) to move horizontally on the linear guide rail I (10). An adjusting shim (4) is provided between the linear guide rail I and the extrusion nozzle platform (6); The extrusion nozzle platform (6) is fixedly connected to the moving element (100) of the linear guide I (10) by bolt I, and a positioning block (8) is provided on the side of the extrusion nozzle platform (6). The positioning block (8) and the moving element (100) are provided with screw holes. Bolt II passes through the corresponding screw holes on the positioning block and the moving element. Tightening bolt II will fix the side of the extrusion nozzle platform (6).

Images