Open-type flexographic printing machine with ejector pin structure

Abstract

The utility model relates to the technical field of printing devices, in particular to an open-type ejector pin structure flexographic printing machine which comprises a printing roller, a printing plate roller and an anilox roller, and the axes of the printing roller, the printing plate roller and the anilox roller are located on the same horizontal line. The printing plate roller and the anilox roller are in sliding connection with the racks on the two sides and are far away from or close to the printing roller; the two ends of the printing plate roller are in sliding connection with the machine frames on the two sides in the axis direction of the printing plate roller. The printing roller, the printing plate roller and the anilox roller of the open-type ejector pin structure flexographic printing machine are located on the same horizontal line, the overprinting process can be simplified, position errors possibly caused by triangular arrangement are reduced, and the precision and accuracy of overprinting can be improved.

Description

Technical Field

[0001] The present application relates to the technical field of printing devices, and in particular to a flexographic printing machine with an open ejector pin structure. Background Art

[0002] At present, the three rollers of the flexographic printing machine, the printing plate roller, and the anilox roller, which are widely used in the market, are arranged in a triangle, and the structure of the printing plate roller is an integrated shaft. This method has the following disadvantages: (1) The positional relationship between the printing plate roller, the printing plate roller, and the anilox roller in the triangular arrangement has an important influence on the overprint accuracy. Inaccurate position or angle setting of the rollers will lead to overprint errors and affect the printing quality; (2) Since the positions of the three rollers are interrelated, adjusting the position or parameters of one of the rollers will affect the working state of the other rollers, so the adjustment may be more complicated; (3) The integrated shaft structure will limit the adjustment of the pressure and balance between the printing plate roller, the printing plate roller, and the anilox roller, resulting in instability of printing quality, affecting the printing quality, including printing accuracy, overprint accuracy, and printing speed; (4) The printing plate may deform to a certain extent due to factors such as heat and force during a long printing process. The integrated shaft structure is difficult to effectively control this deformation, resulting in lateral color deviation. Utility Model Content

[0003] In view of the above-mentioned shortcomings of the prior art, the present application provides a flexographic printing machine with an open ejector structure, which can adjust the lateral position of the printing plate roller to achieve precise lateral color registration of printing.

[0004] To achieve the above objectives, the present application is implemented through the following technical solutions: an open-type ejector structure flexographic printing machine, comprising: a printing roller, a printing plate roller and an anilox roller, characterized in that the axes of the printing roller, the printing plate roller and the anilox roller are on the same horizontal line;

[0005] The printing plate roller and the anilox roller are slidably connected to the frames on both sides, away from or close to the printing roller;

[0006] The two ends of the printing plate roller are slidably connected with the frames on both sides along the direction of the axis of the printing plate roller.

[0007] Preferably, the two ends of the printing plate roller are slidably connected to the two side frames in a direction away from or close to the printing roller through a printing plate roller sliding plate;

[0008] The printing plate roller sliding plate is driven to move by the printing plate roller advance and retreat motor.

[0009] Preferably, the anilox roller is slidably connected with the plate roller sliding plate via the anilox roller sliding plate in a direction away from or close to the printing roller;

[0010] The anilox roller is driven to move by an anilox roller advance and retreat motor.

[0011] Preferably, the two ends of the printing plate roller are connected to the printing plate roller sliding plates on both sides by sliding along the direction of the printing plate roller axis through the first ejector pin and the second ejector pin respectively;

[0012] One end of the first ejector pin is drivingly connected to the driving end of the first motor, and the first motor is slidingly connected to the plate roller sliding plate along the axis of the plate roller through the first motor support seat;

[0013] The first motor support seat is driven to move by a cylinder.

[0014] Preferably, one end of the second ejector pin is threadedly connected to a screw rod through a nut, and the screw rod is driven by a second motor to drive the second ejector pin to slide along the direction of the axis of the printing plate roller.

[0015] Preferably, a sliding sleeve is provided on the outer cover of the connecting end of the second ejector pin and the screw rod;

[0016] The sliding sleeve is slidably connected with the guide sleeve through a key and a groove, the sliding sleeve is connected with the second ejector pin through a bearing, and the nut is connected with the sliding sleeve.

[0017] Preferably, a positioning key is provided at the connecting end of the first ejector pin and the printing plate roller, and the positioning key matches with a positioning groove in the connecting hole of the printing plate roller.

[0018] Compared with the known public technologies, the technical solution provided by this application has the following beneficial effects:

[0019] (1) The printing roller, plate roller and anilox roller of the open ejector structure flexographic printing machine of the present application are on the same horizontal line, which can simplify the overprinting process, reduce the position error that may be caused by the triangular arrangement, and help improve the precision and accuracy of overprinting. The arrangement on the same horizontal line helps to improve the stability of the system and reduce unnecessary interference between rollers, thereby providing a more stable printing environment; in addition, the plate roller and the anilox roller are slidably connected to the frames on both sides, and can be away from or close to the printing roller, which is convenient for the replacement of the rollers;

[0020] (2) The first ejector pin of the flexographic printing machine with an open ejector pin structure of the present application is driven to move by an air cylinder. After the air cylinder retracts, the first ejector pin retracts and the printing plate roller can be removed and replaced. The air cylinder extends to control the first ejector pin to extend and clamp the printing plate roller. The second motor can adjust the position of the second ejector pin and the lateral position of the printing plate roller to achieve lateral color registration of the printing. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the prior art descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application, and for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0022] Figure 1 This is a schematic diagram of the structure of the open ejector structure flexographic printing machine in this application;

[0023] Figure 2 A side view of the flexographic printing machine with an open ejector structure in this application;

[0024] Figure 3 is a cross-sectional view of the printing plate roller in this application;

[0025] Figure 4 A schematic diagram of the structure of the first ejector pin added in this application;

[0026] Figure 5 This is a schematic diagram of the structure of the second ejector pin in this application;

[0027] Figure 6 It is a cross-sectional view of the second ejector pin in this application.

[0028] In the above picture:

[0029] 100-rack;

[0030] 110-printing roller;

[0031] 120-plate roller; 121-plate roller sliding plate; 122-plate roller forward and backward motor; 123-first ejector pin; 1231-positioning key; 124-second ejector pin; 125-first motor; 126-first motor support seat; 127-cylinder; 128-screw rod; 129-second motor;

[0032] 130-anilox roller; 131-anilox roller sliding plate; 132-anilox roller advance and retreat motor;

[0033] 141-nut; 142-sliding sleeve; 143-guide sleeve; 144-first sleeve; 145-second sleeve;

[0034] 151-first support seat; 152-plate roller advance and retreat screw; 153-anilox roller advance and retreat screw. DETAILED DESCRIPTION

[0035] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0036] like Figure 1-2 As shown, the open ejector structure flexographic printing machine includes: a printing roller 110, a plate roller 120 and an anilox roller 130 whose axes are on the same horizontal line. The plate roller 120 and the anilox roller 130 are slidably connected with the frames 100 on both sides, and can be away from or close to the printing roller 110, and the two ends of the plate roller 120 are slidably connected with the frames 100 on both sides along the direction of the axis of the plate roller 120.

[0037] Specifically, both ends of the plate roller 120 are connected to the plate roller sliding plate 121 through the support seat, and the plate roller sliding plate 121 is connected to the two side frames 100 through the connection mode of the slider and the slide groove, and the plate roller forward and backward motor 122 drives the plate roller sliding plate 121 to move the plate roller 120 away from or close to the printing roller 110.

[0038] Both ends of the anilox roller 130 are connected to the anilox roller sliding plate 131 through a support seat, and the anilox roller sliding plate 131 is connected to the plate roller sliding plate 121 through a slider and a slide groove. The anilox roller forward and backward motor 132 drives the anilox roller sliding plate 131 to slide on the plate roller sliding plate 121.

[0039] In this embodiment, the plate roller advance and retreat motor 122 and the anilox roller advance and retreat motor 132 are fixed on the first support seat 151, and the first support seat 151 is connected to one end of the plate roller sliding plate 121. The plate roller advance and retreat motor 122 is threadedly connected to the frame 100 through the plate roller advance and retreat screw 152. When the plate roller advance and retreat motor 122 is working, since the frame 100 is fixed, under the action of the plate roller advance and retreat screw 152, the plate roller advance and retreat motor 122 drives the plate roller sliding plate 121 to slide on the frame 100 through the first support seat 151, thereby driving the plate roller 120 and the anilox roller 130 to move, so that the plate roller 120 and the anilox roller 130 are away from or close to the printing roller 110.

[0040] The anilox roller advance and retreat motor 132 is threadedly connected to the anilox roller sliding plate 131 through the anilox roller advance and retreat screw 153. When the distance between the printing plate roller 120 and the anilox roller 130 needs to be adjusted, the anilox roller advance and retreat motor 132 works. At this time, since the printing plate roller sliding plate 121 is in a fixed state, the anilox roller advance and retreat screw 153 drives the anilox roller sliding plate 131 to move on the printing plate roller sliding plate 121, thereby moving away from or close to the printing plate roller 120.

[0041] The printing roller 110, the plate roller 120 and the anilox roller 130 of the open ejector structure flexographic printing machine in the present application are on the same horizontal line, which can simplify the overprinting process, reduce the position error that may be caused by the triangular arrangement, and help improve the precision and accuracy of overprinting. The arrangement on the same horizontal line helps to improve the stability of the system and reduce unnecessary interference between rollers, thereby providing a more stable printing environment. In addition, the plate roller 120 and the anilox roller 130 are slidably connected to the two side frames 100, and can be away from or close to the printing roller 110, which is convenient for the replacement of the rollers.

[0042] As a further solution of this embodiment, Figure 3-6 As shown, the two ends of the plate roller 120 are slidably connected with the plate roller sliding plates 121 on both sides along the direction of the axis of the plate roller 120 through the first ejector pin 123 and the second ejector pin 124 respectively; one end of the first ejector pin 123 is transmission-connected with the driving end of the first motor 125, and the first motor 125 is slidably connected with the plate roller sliding plate 121 through a linear slide rail through the first motor support seat 126, and the first motor support seat 126 is driven to move by the cylinder 127.

[0043] In order to improve the safety of the open ejector structure flexographic printing machine and reduce the exposed rotating parts of the equipment, a first sleeve 144 is provided outside the first ejector 123 through a needle bearing sleeve. The first sleeve 143 is fixedly mounted on the plate roller sliding plate 121. The first ejector 123 can slide along the axial direction while rotating.

[0044] One end of the first ejector pin 123 is connected to the keyway of the printing plate roller 120 through a positioning key, and the other end is connected to the first motor 125 through a coupling.

[0045] One end of the second ejector pin 124 is threadedly connected to a screw rod 128 via a nut 141 . The screw rod 128 is driven by a second motor 129 to drive the second ejector pin 124 to slide along the axis of the printing plate roller 120 .

[0046] Specifically, Figure 5-6As shown, a second sleeve 145 is provided outside the second ejector pin 124 through a needle bearing sleeve, a guide sleeve 143 is installed at one end of the second sleeve, the guide sleeve 143 and the second sleeve 145 are in a concentric state, a sliding sleeve 142 is connected to the inside of the guide sleeve 143 through a key and a groove, so that the sliding sleeve 142 can only move along the axial direction but cannot rotate, the sliding sleeve 142 is connected to the second ejector pin 124 through a bearing, so that the second ejector pin 124 can rotate, and the nut 141 is connected to the sliding sleeve 142, when the screw rotates, the sliding sleeve 142 is driven to move by the nut 141, and the second ejector pin 124 is driven to move.

[0047] The first ejector pin 123 of the flexographic printing machine with an open ejector pin structure of the present application is driven to move by the cylinder 127. After the cylinder 127 retracts, the first ejector pin 123 retracts and the printing plate roller 120 can be removed and the roller can be replaced. The cylinder 127 extends to control the first ejector pin 123 to extend and clamp the printing plate roller 120. The second motor 129 can adjust the position of the second ejector pin 124 and the lateral position of the printing plate roller to achieve lateral color registration of printing.

[0048] The above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, a person skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. However, these modifications or replacements will not cause the essence of the corresponding technical solutions to deviate from the protection scope of the technical solutions of the embodiments of the present application.

Claims

1. Open ejector structure flexographic printing machine, including: A printing roller (110), a printing plate roller (120) and an anilox roller (130), characterized in that the axes of the printing roller (110), the printing plate roller (120) and the anilox roller (130) are on a common horizontal line; The printing plate roller (120) and the anilox roller (130) are slidably connected to the frames (100) on both sides, and are away from or close to the printing roller (110); Both ends of the printing plate roller (120) are slidably connected to the two side frames (100) along the direction of the axis of the printing plate roller (120).

2. The open ejector structure flexographic printing machine according to claim 1, characterized in that: The two ends of the printing plate roller (120) are slidably connected to the two side frames (100) via printing plate roller sliding plates (121) in a direction away from or approaching the printing roller (110); The printing plate roller sliding plate (121) is driven to move by a printing plate roller advance and retreat motor (122).

3. The open ejector structure flexographic printing machine according to claim 2, characterized in that: The anilox roller (130) is slidably connected to the plate roller sliding plate (121) via the anilox roller sliding plate (131) in a direction away from or approaching the printing roller (110); The anilox roller (130) is driven to move by an anilox roller advance and retreat motor (132).

4. The open ejector structure flexographic printing machine according to claim 1, characterized in that: The two ends of the printing plate roller (120) are slidably connected to the printing plate roller sliding plates (121) on both sides along the axis direction of the printing plate roller (120) through a first ejector pin (123) and a second ejector pin (124) respectively; One end of the first ejector pin (123) is drivingly connected to the driving end of the first motor (125); the first motor (125) is slidably connected to the printing plate roller sliding plate (121) along the axis of the printing plate roller (120) via the first motor support seat (126); The first motor support seat (126) is driven to move by a cylinder (127).

5. The open ejector structure flexographic printing machine according to claim 4, characterized in that: One end of the second ejector pin (124) is threadedly connected to a screw rod (128) via a nut (141); the screw rod (128) is driven by a second motor (129) to drive the second ejector pin (124) to slide along the axis of the printing plate roller (120).

6. The open ejector structure flexographic printing machine according to claim 5, characterized in that: The connecting end of the second ejector pin (124) and the screw rod (128) is provided with a sliding sleeve (142); The sliding sleeve (142) is slidably connected to the guide sleeve (143) via a key and a groove, the sliding sleeve (142) is connected to the second ejector pin (124) via a bearing, and the nut (141) is connected to the sliding sleeve (142).

7. The open ejector structure flexographic printing machine according to claim 4, characterized in that: A positioning key (1231) is provided at the connection end of the first ejector pin (123) with the printing plate roller (120), and the positioning key (1231) matches with a positioning groove in the connection hole of the printing plate roller (120).

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