Adjusting and locking mechanism of pneumatic type closed scraper

Abstract

The utility model relates to a flexographic printing machine, in particular to an adjusting and locking mechanism of a pneumatic type closed scraper, which comprises a support beam, the closed scraper is mounted on the support beam, the adjusting and locking mechanism further comprises scraper seats on two sides, adjustable cylinders are arranged on the scraper seats on the two sides, an induction check valve is connected between each adjustable cylinder and an air source, and the air source is connected with the air source. The output end of the adjustable air cylinder is connected with sliding blocks, the supporting beam is connected between the sliding blocks on the two sides, the air can only enter the air cylinder from an air source in a one-way mode through the induction check valve, a relatively-closed and small air cavity is formed, and the pressing force between the scraper and the anilox roller is changed by adjusting the size of the air cavity of the adjustable air cylinder. And the floating joint enables the sliding block to move without being blocked.

Description

Technical Field

[0001] This utility model relates to flexographic printing presses, and in particular to an adjustment and locking mechanism for a pneumatic closed doctor blade. Background Technology

[0002] Chinese utility patent CN205395441U discloses a closed-type doctor blade moving and flipping mechanism. The cylinder piston shaft drives the doctor blade moving block to move flexibly and precisely along the linear guide rail, which drives the upper and lower doctor blades of the doctor blade body assembly to form a closed ink cavity with the anilox roller. Since it is a horizontal linear movement, the clamping force between the doctor blade and the anilox roller can be finely adjusted using the adjusting nut, but the clamping force cannot be adjusted during operation. Utility Model Content

[0003] In view of the technical problems existing in the background art, the present invention aims to provide an adjustment and locking mechanism for a pneumatic closed scraper, wherein an induction check valve is connected between an adjustable cylinder and an air source, so that the clamping force between the scraper and the anilox roller is adjustable during operation.

[0004] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: the adjustment and locking mechanism of the pneumatic closed scraper includes a support beam, on which a closed scraper is installed. It also includes two scraper seats on both sides, each of which is provided with an adjustable cylinder. An induction check valve is connected between the adjustable cylinder and the air source. A slider is connected to the output end of the adjustable cylinder, and the support beam is connected between the two sliders.

[0005] In this scheme, the induced check valve allows gas to enter the cylinder from the gas source in only one direction, forming a relatively closed and small air chamber. Adjusting the size of the air chamber of the adjustable cylinder changes the clamping force between the scraper and the anilox roller.

[0006] Preferably, the adjustable cylinder includes a body, an adjusting rod, and a piston rod. The body has an air chamber, the adjusting rod is threaded to the body and extends into the air chamber, and one end of the piston rod is located inside the air chamber.

[0007] In this scheme, rotating the adjusting rod changes the depth of the adjusting rod into the air chamber, finely adjusting the size of the air chamber, and finely adjusting the extension length of the piston rod to adjust the clamping force.

[0008] Preferably, a floating joint is connected between the slider and the output end of the adjustable cylinder.

[0009] In this design, the floating joint ensures that the slider moves smoothly without jamming.

[0010] Preferably, the scraper holder is provided with a groove, and the slider is longitudinally slidably disposed in the groove.

[0011] In this design, the slide guides the sliding of the slider.

[0012] Preferably, the support beam is provided with an adjustment seat for installing a closed scraper. The adjustment seat is L-shaped and includes a horizontal plate with a through hole. A limiting screw passes through the through hole and is threaded to the top surface of the support beam. An adjustment screw is threaded to the horizontal plate, and the end of the adjustment screw abuts against the top surface of the support beam.

[0013] In this scheme, rotating the adjusting screw and the limit screw can adjust the vertical position of the adjusting seat so that the center line of the scraper cavity coincides with the center line of the screen roller.

[0014] Preferably, the adjusting seat further includes a vertical plate, the vertical plate having elongated slots at its four corners, and positioning screws passing through the elongated slots and threadedly connected to the front of the support beam.

[0015] In this design, the elongated slot accommodates the raising and lowering of the adjusting seat, and tightening the positioning screw completes the positioning of the adjusting seat.

[0016] Preferably, the closed scraper is connected to a locking block, both the locking block and the vertical plate are provided with U-shaped openings, the bottom of the vertical plate is provided with a support plate for abutting the locking block, the support beam is threadedly connected to a pull rod, the end of the pull rod is provided with a limiting ring, the U-shaped opening is for the pull rod to pass through, and a groove is formed between the locking block and the closed scraper for the limiting ring to extend into and move.

[0017] In this design, the pallet supports the enclosed scraper during operation, and rotating the pull rod causes the limit ring to press the locking block and the adjusting seat together.

[0018] Preferably, the locking block is located between the positioning screws, and a gap is formed between the adjusting seat and the enclosed scraper for fingers to insert and move.

[0019] In this method, the operator places their hand between the mounting beam and the enclosed scraper, and inserts their fingers into the gap to rotate the positioning screw.

[0020] The beneficial effects of this invention are as follows: the induced check valve ensures that gas can only enter the cylinder from the gas source in one direction, forming a relatively closed and small air chamber; adjusting the size of the air chamber in the adjustable cylinder changes the clamping force between the scraper and the anilox roller; and the floating joint prevents the slider from moving without jamming. Therefore, this invention has substantial features and progress compared with the prior art. Attached Figure Description

[0021] The following description, in conjunction with the accompanying drawings, details the embodiments and working principles of this utility model.

[0022] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0023] Figure 2 for Figure 1 A magnified view of A in the middle.

[0024] Figure 3 This is a cross-sectional view of the present invention.

[0025] In the diagram: 1. Support beam; 2. Enclosed scraper; 3. Scraper seat; 4. Adjustable cylinder; 5. Induction check valve; 6. Slider; 7. Floating joint; 8. Adjusting seat; 9. Horizontal plate; 10. Limit screw; 11. Adjusting screw; 12. Vertical plate; 13. Positioning screw; 14. Locking block; 15. Support plate; 16. Pull rod; 17. Limit ring; 18. Adjusting rod; 19. Main body. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the implementation of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0027] In the description of this application, it should be understood that the terms "upper" and "lower" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0028] In the description of this application, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated.

[0029] See appendix Figure 1-2This embodiment of the invention provides an adjustment and locking mechanism for a pneumatic closed scraper, comprising a support beam 1 on which a closed scraper 2 is mounted. It also includes two scraper seats 3 on either side, each equipped with an adjustable cylinder 4. Each adjustable cylinder 4 includes a body 19, an adjusting rod 18, and a piston rod. The body 19 contains an air chamber. The adjusting rod 18 is threaded to the body 19 and extends into the air chamber. One end of the piston rod is located within the air chamber. An induction check valve 5 connects the adjustable cylinder 4 to an air source. A slider 6 is connected to the output end of the adjustable cylinder 4. A floating connector 7 connects the slider 6 to the output end of the adjustable cylinder 4. A groove is provided within the scraper seat 3, and the slider 6 slides longitudinally within the groove. The support beam 1 connects the two sliders 6 on either side.

[0030] In this embodiment, after the closed-type scraper 2 is installed in place, the adjustable cylinder 4 is vented, and the piston rod moves to make the slider 6 connected to the output end of the adjustable cylinder 4 slide into place along the slide groove. During operation, the adjusting rod 18 is rotated to extend into the air chamber and drive the piston rod to move further, so as to finely adjust the clamping force between the scraper and the anilox roller. When the air pressure in the air chamber is greater than the air pressure of the air source, the induced check valve isolates the air source from the air chamber. When disassembling the closed-type scraper 2, a pilot pressure is applied to the induced check valve, and the air chamber is connected to the air source to release air. Alternatively, the closed-type scraper 2 can be disassembled by releasing air, and the principle is the same. Among them, an adjusting sleeve can be fitted on the adjusting rod 18 to increase the adjustment range, which is a mature technology. The floating joint 7 is a mechanical connection component that allows slight axial, radial or angular displacement. It is used to compensate for deviations caused by assembly errors, thermal expansion or vibration, and at the same time transmit torque or force, which is a mature technology.

[0031] See appendix Figure 1-3 The support beam 1 is provided with an adjusting seat 8 for installing a closed scraper 2. The adjusting seat 8 is L-shaped and includes a horizontal plate 9 with a through hole. A limiting screw 10 passes through the through hole and is threadedly connected to the top surface of the support beam 1. An adjusting screw 11 is threadedly connected to the horizontal plate 9, and the end of the adjusting screw 11 abuts against the top surface of the support beam 1. The adjusting seat 8 also includes a vertical plate 12 with elongated slots at its four corners. A positioning screw 13 passes through the elongated slots and is threadedly connected to the front surface of the support beam 1. The closed scraper 2 is connected... There is a locking block 14. Both the locking block 14 and the vertical plate 12 are provided with U-shaped openings. The bottom of the vertical plate 12 is provided with a support plate 15 for abutting the locking block 14. The support beam 1 is threadedly connected to a pull rod 16. The end of the pull rod 16 is provided with a limiting ring 17. The U-shaped opening allows the pull rod 16 to pass through. A groove is formed between the locking block 14 and the closed scraper 2 for the limiting ring 17 to extend and move. The locking block 14 is located between the positioning screws 13. A gap is formed between the adjusting seat 8 and the closed scraper 2 for a finger to extend and move.

[0032] In this embodiment, the limiting screw 10 pulls the adjusting seat 8 through the nut, and the adjusting screw 11 lifts the adjusting seat 8. The two work together to vertically position the adjusting seat 8. Rotating the limiting screw 10 and the adjusting screw 11 can adjust the vertical position of the adjusting seat 8 so that the center line of the scraper cavity coincides with the center line of the screen roller, reducing scraper wear and ink leakage. Tightening the positioning screw 13 completes the fixing of the adjusting seat 8. The locking block 14 abuts against the support plate 15 so that the adjusting seat 8 supports the closed scraper 2 during operation. The limiting ring 17 applies force to the locking block 14 through the groove wall, pressing the locking block 14 and the adjusting seat 8 together.

[0033] The above description represents the preferred embodiment of this utility model. It should be noted that the protection scope of this utility model is not limited thereto. For those skilled in the art, various improvements, modifications, or equivalent substitutions can be made without departing from the equivalent inventive concept disclosed in this utility model, and these modifications and substitutions are also considered to be within the protection scope of this utility model.

Claims

1. An adjustment and locking mechanism for a pneumatic closed scraper, comprising a support beam (1), wherein a closed scraper (2) is mounted on the support beam (1), characterized in that: It also includes two scraper seats (3), each of which is equipped with an adjustable cylinder (4). An induction check valve (5) is connected between the adjustable cylinder (4) and the air source. A slider (6) is connected to the output end of the adjustable cylinder (4), and the support beam (1) is connected between the sliders (6) on both sides.

2. The pneumatic closed scraper adjustment and locking mechanism as described in claim 1, characterized in that: The adjustable cylinder (4) includes a main body (19), an adjusting rod (18) and a piston rod. The main body (19) has an air chamber. The adjusting rod (18) is threadedly connected to the main body (19) and extends into the air chamber. One end of the piston rod is located in the air chamber.

3. The adjusting and locking mechanism of the pneumatic closed scraper as described in claim 1, characterized in that: A floating connector (7) is connected between the slider (6) and the output end of the adjustable cylinder (4).

4. The adjusting and locking mechanism of a pneumatic closed scraper as described in claim 1, characterized in that: The scraper seat (3) is provided with a groove, and the slider (6) is longitudinally slidably disposed in the groove.

5. The adjustment and locking mechanism of a pneumatic closed scraper as described in claim 1, characterized in that: The support beam (1) is provided with an adjustment seat (8) for installing a closed scraper (2). The adjustment seat (8) is L-shaped and includes a horizontal plate (9). The horizontal plate (9) has a through hole. A limiting screw (10) passes through the through hole and is threaded to the top surface of the support beam (1). The horizontal plate (9) is threaded with an adjustment screw (11). The end of the adjustment screw (11) abuts against the top surface of the support beam (1).

6. The adjusting and locking mechanism of a pneumatic closed scraper as described in claim 5, characterized in that: The adjusting seat (8) also includes a vertical plate (12), which has long slots at its four corners. The positioning screws (13) pass through the long slots and are threaded to the front of the support beam (1).

7. The adjustment and locking mechanism of a pneumatic closed scraper as described in claim 6, characterized in that: The closed scraper (2) is connected to a locking block (14). Both the locking block (14) and the vertical plate (12) are provided with U-shaped openings. The bottom of the vertical plate (12) is provided with a support plate (15) for abutting the locking block (14). The support beam (1) is threadedly connected to a pull rod (16). The end of the pull rod (16) is provided with a limiting ring (17). The U-shaped opening allows the pull rod (16) to pass through. A groove is formed between the locking block (14) and the closed scraper (2) for the limiting ring (17) to extend into and move.

8. The adjusting and locking mechanism of a pneumatic closed scraper as described in claim 7, characterized in that: The locking block (14) is located between the positioning screws (13), and a gap is formed between the adjusting seat (8) and the closed scraper (2) for the fingers to insert and move.

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