A device for collecting residual dust from a powder jet of an offset printing machine

Abstract

The utility model discloses a kind of powder residual dust collection devices for offset press powder spraying, including printing machine paper collection unit machine support cover, negative pressure centrifugal fan, the inlet of the negative pressure centrifugal fan is connected with corn flour collection cover by corn flour negative pressure mixing transmission pipeline communication, the corn flour collection cover is installed on printing machine paper collection unit machine support cover, the inlet of the negative pressure centrifugal fan is connected with printing machine paper collection unit machine support cover by lower corn flour negative pressure mixing transmission pipeline communication.The utility model can effectively collect redundant corn flour, ensure that there is no residual corn flour on printed matter, while reducing the usage amount of corn flour, greatly improve the waste caused by excessive spraying of corn flour in subsequent process screening, improve the quality stability of product, solve the problem that the surrounding environment of equipment paper collection unit is discharged poorly due to ineffective spraying too much.

Description

Technical Field

[0001] This utility model relates to the field of offset printing machine powder spraying technology, and in particular to a device for collecting residual dust from offset printing machine powder spraying. Background Technology

[0002] The printing process for sheet-fed coated paper and cardstock using ordinary inks mainly consists of the following components: paper feeding unit, paper positioning unit, front guide pulling and positioning unit, ink supply unit, water supply unit, ink transfer unit, paper conveying unit, IR drying unit, powder spraying unit, and printed matter collection unit. The powder spraying unit is a particularly crucial system.

[0003] We know that in powder spraying systems, when printed materials are conveyed to the system via the paper conveyor, the control system uses a centrifugal force to atomize cornstarch onto the surface of the printed material. This ensures that when the next sheet arrives, it is separated from the previous one, preventing the ink on the printed side from affecting the back of the previous sheet. The cornstarch, under the blowing action, sprays powder onto both the effective and ineffective sides of the printed material simultaneously. Since the ineffective areas have no place to receive the powder, the paper delivery unit arrives with a large amount of cornstarch, resulting in significant waste. Furthermore, due to the drying characteristics of the ink on the front side of the printed material, only a portion of the sprayed cornstarch can be absorbed, leaving the excess on the printed material. This residue will cause numerous white spots and poor lamination adhesion during the next lamination process, resulting in a large number of defective products. To solve these problems, we propose a residual dust collection device for offset printing presses. Summary of the Invention

[0004] The purpose of this invention is to address the shortcomings of existing technologies by proposing a device for collecting residual dust from offset printing machines.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A device for collecting residual dust from offset printing press powder spraying includes a machine support cover for the paper receiving unit of the printing press and a negative pressure centrifugal fan. The inlet of the negative pressure centrifugal fan is connected to a corn flour collection hood via a corn flour negative pressure mixing and conveying pipeline. The corn flour collection hood is installed on the machine support cover of the paper receiving unit of the printing press. The inlet of the negative pressure centrifugal fan is connected to the machine support cover of the paper receiving unit of the printing press via a lower corn flour negative pressure mixing and conveying pipeline. The outlet of the negative pressure centrifugal fan is connected to a sealed separator via a corn flour positive pressure mixing and conveying pipeline. A filter cover is connected to the top of the sealed separator. An inspection cover is installed on the top of the filter cover. A positive pressure separation outlet is connected to the side of the filter cover. A filter is installed inside the filter cover. The filter is connected to the positive pressure separation outlet via a positive pressure separation filter outlet. The positive pressure separation outlet is connected to a positive pressure output pipeline. A conical corn flour collection port is connected to the bottom of the sealed separator.

[0007] Preferably, a separation control regulator for adjusting the frequency of the negative pressure centrifugal fan is installed on the side of the sealed separator.

[0008] Preferably, a corn flour collection port is installed at the bottom of the conical corn flour collection port.

[0009] Preferably, the corn flour negative pressure mixing and conveying pipeline draws corn flour from the ineffective printing surface through a corn flour collecting cover.

[0010] Preferably, the lower corn flour negative pressure mixing and conveying pipeline collects excess corn flour around the printing press paper receiving unit through the machine support cover of the printing press paper receiving unit.

[0011] Compared with the prior art, the beneficial effects of this utility model are:

[0012] This invention can effectively collect excess cornstarch, ensuring that there is no cornstarch residue on the printed materials. At the same time, it can reduce the amount of cornstarch used, greatly improve the screening of waste products caused by excessive cornstarch spraying in subsequent processes, improve the quality stability of products, and solve the problem of poor emissions around the equipment caused by excessive ineffective spraying in the paper receiving unit. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of a residual dust collection device for offset printing machine powder spraying proposed in this utility model;

[0014] Figure 2 This is a schematic diagram of the conical corn flour collection port of the offset printing machine powder spraying residual dust collection device proposed in this utility model;

[0015] Figure 3This is a schematic diagram of the internal structure of a filter cover for a powder spraying residual dust collection device for offset printing machines, as proposed in this utility model.

[0016] In the diagram: 1. Printing press paper receiving unit machine support cover; 2. Negative pressure centrifugal fan; 3. Upper corn flour negative pressure mixing and conveying pipeline; 4. Lower corn flour negative pressure mixing and conveying pipeline; 5. Corn flour positive pressure mixing and conveying pipeline; 6. Positive pressure output pipeline; 7. Corn flour collection port; 8. Separation control regulator; 9. Conical corn flour collection port; 10. Inspection cover; 11. Filter cover; 12. Corn flour collection cover; 13. Sealed separator; 22. Positive pressure separation outlet; 33. Positive pressure separation filter outlet; 44. Filter. Detailed Implementation

[0017] 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 present utility model, and not all embodiments.

[0018] Reference Figure 1-3A device for collecting residual dust from offset printing press powder spraying includes a machine support cover 1 for the paper delivery unit of the printing press, and a negative pressure centrifugal fan 2. The inlet of the negative pressure centrifugal fan 2 is connected to a corn flour collection hood 12 via a corn flour negative pressure mixing and conveying pipeline 3. The corn flour collection hood 12 is installed on the machine support cover 1 for the paper delivery unit of the printing press. The inlet of the negative pressure centrifugal fan 2 is connected to the machine support cover 1 for the paper delivery unit of the printing press via a lower corn flour negative pressure mixing and conveying pipeline 4. The outlet of the negative pressure centrifugal fan 2 is connected to a sealed separation system via a corn flour positive pressure mixing and conveying pipeline 5. The top of the sealed separator 13 is connected to a filter cover 11, and a maintenance cover 10 is installed on the top of the filter cover 11. A positive pressure separation outlet 22 is connected to the side of the filter cover 11. A filter 44 is installed inside the filter cover 11, and the filter 44 is connected to the positive pressure separation outlet 22 via a positive pressure separation filter outlet 33. A positive pressure output pipe 6 is connected to the positive pressure separation outlet 22. A conical corn flour collection port 9 is connected to the bottom of the sealed separator 13. A separator for adjusting the frequency of the negative pressure centrifugal fan 2 is installed on the side of the sealed separator 13. Control regulator 8, the separation control regulator 8 is used to adjust the frequency of the negative pressure centrifugal fan 2, thereby controlling the negative pressure. A corn flour collection port 7 is installed at the bottom of the conical corn flour collection port 9. The corn flour collection port 7 is used to connect to an external collection bag to recover corn flour. When the negative pressure centrifugal fan 2 is working, it generates suction force, which is transmitted through the corn flour negative pressure mixing and conveying pipeline 3 and the lower corn flour negative pressure mixing and conveying pipeline 4. Thus, the corn flour negative pressure mixing and conveying pipeline 3 sucks up the corn flour from the printed invalid surface through the corn flour collection hood 12, and the lower corn flour... The negative pressure mixing and conveying pipeline 4 collects excess corn flour around the paper receiving unit of the printing press through the machine support cover 1. The corn flour obtained by suction enters the interior of the sealed separator 13 through the positive pressure mixing and conveying pipeline 5, and then enters the filter cover 11. After passing through the filter 44, the corn flour is filtered down. The excess gas passes through the positive pressure separation filter outlet 33 and the positive pressure separation outlet 22 in sequence, and is finally discharged from the positive pressure output pipeline 6. The obtained corn flour is recovered through the conical corn flour collection port 9 and finally discharged from the corn flour collection port 7.

[0019] Working principle: During use, the separation control regulator 8 is used to adjust the frequency of the negative pressure centrifugal fan 2, thereby controlling the negative pressure. The corn flour collection port 7 is used to connect to the external collection bag to recover corn flour. When the negative pressure centrifugal fan 2 is working, it generates suction force, which is transmitted through the corn flour negative pressure mixing and conveying pipeline 3 and the lower corn flour negative pressure mixing and conveying pipeline 4. Thus, the corn flour negative pressure mixing and conveying pipeline 3 sucks up the corn flour on the printing invalid surface through the corn flour collection cover 12, and the lower corn flour negative pressure mixing and conveying pipeline 4 collects the excess corn flour around the printing press paper receiving unit through the machine support cover 1. The corn flour sucked up enters the interior of the sealed separator 13 through the corn flour positive pressure mixing and conveying pipeline 5, and then enters the filter cover 11. After passing through the filter 44, the corn flour is filtered down. The excess gas passes through the positive pressure separation filter outlet 33 and the positive pressure separation outlet 22 in sequence and is finally discharged from the positive pressure output pipeline 6. The obtained corn flour is recovered through the conical corn flour collection port 9 and finally discharged from the corn flour collection port 7.

[0020] This invention can effectively collect excess cornstarch, ensuring that there is no cornstarch residue on the printed materials. At the same time, it can reduce the amount of cornstarch used, greatly improve the screening of waste products caused by excessive cornstarch spraying in subsequent processes, improve the quality stability of products, and solve the problem of poor emissions around the equipment caused by excessive ineffective spraying in the paper receiving unit.

[0021] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A device for collecting residual dust from offset printing press powder spraying, comprising a machine support cover (1) for the paper receiving unit of the printing press and a negative pressure centrifugal fan (2), characterized in that, The inlet of the negative pressure centrifugal fan (2) is connected to a corn flour collection hood (12) via a corn flour negative pressure mixing and conveying pipeline (3). The corn flour collection hood (12) is installed on the outer cover of the printing press paper receiving unit machine support (1). The inlet of the negative pressure centrifugal fan (2) is connected to the outer cover of the printing press paper receiving unit machine support (1) via a lower corn flour negative pressure mixing and conveying pipeline (4). The outlet of the negative pressure centrifugal fan (2) is connected to a sealed separator (13) via a corn flour positive pressure mixing and conveying pipeline (5). The sealed separator (13) The top of the filter housing (11) is connected to a filter cover (11), the top of the filter cover (11) is equipped with a maintenance cover (10), the side of the filter cover (11) is connected to a positive pressure separation outlet (22), the inside of the filter cover (11) is equipped with a filter (44), the filter (44) is connected to the positive pressure separation outlet (22) through the positive pressure separation filter outlet (33), the positive pressure separation outlet (22) is connected to a positive pressure output pipeline (6), and the bottom of the sealed separator (13) is connected to a conical corn flour collection port (9).

2. The device for collecting residual dust from offset printing machine powder spraying according to claim 1, characterized in that, The sealed separator (13) is equipped with a separation control regulator (8) for adjusting the frequency of the negative pressure centrifugal fan (2).

3. The device for collecting residual dust from offset printing machine powder spraying according to claim 1, characterized in that, The bottom of the conical corn flour collection port (9) is equipped with a corn flour collection port (7).

4. The device for collecting residual dust from offset printing machine powder spraying according to claim 1, characterized in that, The corn flour negative pressure mixing and conveying pipeline (3) draws corn flour from the printing invalid surface through the corn flour collection hood (12).

5. A device for collecting residual dust from offset printing machine powder spraying according to claim 1, characterized in that, The lower corn flour negative pressure mixing and conveying pipeline (4) collects excess corn flour around the printing press paper receiving unit through the machine support cover (1).

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