Ink fountain device of web press

Abstract

The invention discloses an ink fountain device of a web printing press. The ink fountain device comprises two ink fountain end plates, an ink fountain seat, an ink knife and a plurality of ink quantity adjusting mechanisms, wherein the two ink fountain end plates are respectively mounted on the inner sides of two main wallboards of the printing press; the ink fountain seat is bridged between the two ink fountain end plates; the ink knife consists of a plurality of sections of regional ink knives; the multiple sets of ink quantity adjusting mechanisms and the multiple sections of regional ink blades are installed on the ink fountain base in a one-to-one correspondence mode. Each set of ink quantity adjusting mechanism comprises a top block hinging shaft which is bridged between the two ink fountain end plates and is positioned at the upper part of the upper notch of the ink fountain seat, an ink knife top block which is rotatably sleeved on the top block hinging shaft, an ink key motor which is arranged in the lower notch of the ink fountain seat, and a top rod which is connected to a rotating shaft of the ink key motor; the ejector rod is installed in a threaded guide hole formed in the ink fountain base, and the front end of the ejector rod abuts against the rear end face of the lower portion of the ink knife ejector block, so that the top front end of the ink knife ejector block abuts against the front portion of the bottom face of the regional ink knife. According to the invention, the ink feeding amount of any area can be accurately adjusted.

Description

Technical Field

[0001] The invention relates to an ink fountain device of a web printing press. Background Art

[0002] During the printing process, the printing press needs to flexibly adjust the ink volume quickly and accurately according to the printing area. The thickness of the ink layer is not only restricted by the properties of the ink and paper, but also affected by the printing speed, printing pressure, environmental factors, etc. (for example, different inks have different performance and coloring power. In order to achieve a certain required density value, the thickness of the ink layer is different). In short, in the actual production process, the control of the ink volume has very large uncertainty and strong nonlinearity due to the influence of various factors such as the printing machine type, paper, ink characteristics, water-ink balance, printing pressure, and measuring instruments. In addition, when there are many printing color groups, the printing format is wide, and the ink key width is small, the ink volume controller must also control the ink volume of multiple partitions at the same time. For the increasingly fast printing speed requirements nowadays, the real-time requirements of the ink volume control are very high, which makes the design of a high-performance ink volume controller quite difficult. Therefore, a set of adjustment devices that can adjust the ink volume of the ink fountain in sections is needed. The ink fountain device in the existing web printing press does not have a fine enough area for adjusting the ink volume. Summary of the invention

[0003] The object of the present invention is to overcome the defects of the prior art and provide an ink fountain device for a web printing press, which can accurately adjust the ink supply amount in any area and better adjust the color depth required for the printed product, which is convenient for operation and can improve the appearance of the printed product.

[0004] The object of the present invention is achieved as follows: an ink fountain device of a web printing press comprises two ink fountain end plates, an ink fountain seat, an ink knife and a plurality of ink volume adjustment mechanisms; the outer side surfaces of the two ink fountain end plates are respectively mounted on the inner sides of two main wall plates of the printing press through ink fountain end shafts in a one-to-one correspondence; the ink fountain seat is straddled between the two ink fountain end plates, the top surface of the ink fountain seat is a downwardly inclined inclined surface, a rectangular upper notch is provided at the front end of the top surface of the ink fountain seat, and a rectangular lower notch is provided at the rear end of the bottom surface of the ink fountain seat; the ink knife is mounted on the top surface of the ink fountain seat, and the ink knife is divided into a plurality of regional ink knives by a plurality of transverse cutting lines from a whole ink knife; the plurality of ink volume adjustment mechanisms and the plurality of regional ink knives are mounted on the ink fountain seat in a one-to-one correspondence;

[0005] Each set of ink volume adjustment mechanism includes a top block hinge shaft, an ink knife top block, an ink key motor and a top rod;

[0006] The top block hinge shaft is connected between the two ink fountain end plates of the ink fountain and is located at the upper part of the upper notch of the ink fountain seat;

[0007] A hinge hole is provided on the upper side of the ink knife top block, so that the ink knife top block can be rotatably sleeved on the top block hinge shaft;

[0008] The ink key motor is installed in the lower notch of the ink fountain seat through a motor mounting bracket;

[0009] The push rod is connected to the rotating shaft of the ink key motor. The push rod is a screw and is installed in a threaded guide hole opened on the ink fountain seat. The front end of the push rod is against the lower rear end surface of the ink knife top block, so that the top front end of the ink knife top block is against the bottom front end of the ink knife in the corresponding area.

[0010] The ink fountain device of the web printing press is as follows: the ink knife is fixed on the top surface of an ink knife base plate, and two rear-threaded blind holes are provided on the rear end surface of the ink knife base plate; an ink knife mounting groove is provided in the middle part of the top surface of the ink fountain seat, the ink knife base plate is installed in the ink knife mounting groove, and two screw through holes are provided on the rear end surface of the ink fountain seat, which correspond to the two rear-threaded blind holes on the ink knife base plate one by one, and an ink knife adjusting screw is respectively installed in the two screw through holes, and the two ink knife adjusting screws are respectively screwed into the two rear-threaded blind holes on the ink knife base plate; at least two bottom-threaded blind holes are provided on the bottom front of the ink knife base plate; two waist-shaped mounting holes corresponding to the two bottom-threaded blind holes on the ink knife base plate are provided on the ink fountain seat, and a fixing screw is respectively installed in the two waist-shaped mounting holes, and the two fixing screws are respectively screwed into the two bottom-threaded blind holes on the ink knife base plate.

[0011] In the above-mentioned ink fountain device of the web printing press, the ink key motor is installed on the motor bracket through a connecting block.

[0012] In the above-mentioned ink fountain device of the web printing press, the push rod is connected to the rotating shaft of the ink key motor through a coupling.

[0013] The ink fountain device of the web printing press of the present invention has the following characteristics: multiple sets of ink volume adjustment mechanisms are used to finely adjust the gap between the piano-key type ink knife and the ink fountain roller in sections to achieve ink volume adjustment in multiple areas; the needs of commercial ink fountain ink color adjustment are met to better adjust the color depth required for the printed product; the adjustment mechanism has a simple structure and is easy to operate. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 is a top view of an ink fountain device of a web printing press of the present invention;

[0015] Figure 2 yes Figure 1 AA view in . DETAILED DESCRIPTION

[0016] The present invention will be further described below in conjunction with the accompanying drawings.

[0017] See also Figure 1 and Figure 2 The ink fountain device of the web offset printing machine of the present invention comprises two ink fountain end plates 1, an ink fountain seat 2, an ink knife 3 and twenty-two sets of ink amount regulating mechanisms.

[0018] The two ink fountain end plates 1 are installed one by one on the inner side of two main wall panels (not shown in the figure) of the printing press. The outer side surfaces of the two ink fountain end plates 1 are each connected to an ink fountain end shaft 12 through a locking device 11. The two ink fountain end shafts 12 are installed one by one on the two main wall panels of the printing press.

[0019] The ink fountain holder 2 is connected between the two ink fountain end plates 1. The top surface of the ink fountain holder 2 is a downwardly inclined inclined surface. A rectangular upper notch is provided at the front end of the top surface of the ink fountain holder 2, and a rectangular lower notch is provided at the rear end of the bottom surface of the ink fountain holder 2. An ink knife mounting groove is provided in the middle of the top surface of the ink fountain holder 2, and two screw through holes penetrating the rear end wall of the ink knife mounting groove are provided on the rear end surface of the ink fountain holder 2.

[0020] The ink knife 3 is fixed on the top surface of an ink knife bottom plate 30. The ink knife bottom plate 31 is installed in the ink knife installation groove of the ink fountain seat 2. A bottom threaded blind hole is provided on the bottom front of the ink knife bottom plate 31. Two rear threaded blind holes corresponding to the two screw holes on the ink fountain seat 2 are provided on the rear end surface of the ink knife bottom plate 31. Two ink knife adjustment screws 32 are installed in the two screw holes on the ink fountain seat 2 and then screwed into the two rear threaded blind holes on the ink knife bottom plate 31 one by one. The ink fountain seat 2 has two rear threaded blind holes corresponding to the two screw holes on the ink knife bottom plate 31. The two bottom threaded blind holes on the ink cutter 3 correspond to the waist-shaped mounting holes one by one, and a fixing screw 33 is installed in each of the two waist-shaped mounting holes. The two fixing screws 33 are screwed into the two bottom threaded blind holes on the ink cutter bottom plate 31 one by one; by rotating the two ink cutter adjustment screws 32, the distance between the front end of the ink cutter 3 and the ink fountain roller 10 can be preliminarily adjusted. After the adjustment is completed, the ink cutter bottom plate 31 is fixed to the ink fountain seat 2 by the fixing screws 33; the ink cutter 3 is divided into twenty-two regional ink cutters 30 by a plurality of transverse cutting lines from a whole ink cutter.

[0021] Twenty-two sets of ink volume adjustment mechanisms are installed on the ink fountain seat 2 in a one-to-one correspondence with the twenty-two regional ink knives 30; each set of ink volume adjustment mechanisms includes a top block hinge shaft 4, an ink knife top block 5, an ink key motor 6 and a push rod 7; wherein, the top block hinge shaft 4 is connected between the two ink fountain end plates 1 of the ink fountain and is located at the upper part of the upper notch of the ink fountain seat 2; a hinge hole is provided on the upper part of the side surface of the ink knife top block 5, so that the ink knife top block 5 can be rotatably sleeved on the top block hinge shaft 4; the ink key motor 6 is installed in the lower notch of the ink fountain seat 2 through a motor mounting bracket 61 and a connecting block 62; the push rod 7 is connected to the rotating shaft of the ink key motor 6 through a coupling 70, and the push rod 7 is a screw and is installed in a threaded guide hole provided on the ink fountain seat 2, and the front end of the push rod 7 is against the lower rear end surface of the ink knife top block 5, so that the top front end of the ink knife top block 5 is against the bottom front end of the corresponding regional ink knife 30.

[0022] The adjustment method of each set of ink amount adjustment mechanism in the ink fountain device of the web offset printing press of the present invention is: when the ink key motor 6 rotates forward, it drives the push rod 7 to rotate, so that the push rod 7 pushes the ink knife top block 5 to rotate around the top block hinge shaft 4, so that the ink knife top block 5 will push the front end of the ink knife 30 of the corresponding section area upward, so that the gap δ between the front end of the ink knife 3A of the corresponding section area and the ink fountain roller 10 is minimized, that is, the ink output of the ink fountain is minimized. On the contrary, when the ink key motor 6 rotates reversely, the ink knife top block 5 rotates around the top block hinge shaft 4 by its own weight, so that the gap δ between the front end of the ink knife 3A of the corresponding section area and the ink fountain roller 10 becomes larger, that is, the ink output of the ink fountain becomes larger.

[0023] Since the ink fountain knife 3 of the web offset printing press is composed of twenty-two sections of regional ink knives 30, each section of regional ink knife 30 is provided with an independent ink volume adjustment mechanism, and then the ink output of each section of the regional ink fountain is finely adjusted by the above-mentioned adjustment method.

[0024] The ink fountain device of the web offset printing press of the present invention can be opened and away from the ink fountain roller 10, or closed and close to the ink fountain roller 10 through two locking devices 12, so that the gap between the arc surface at the front end of the ink knife end plate 1 and the outer surface of the ink fountain roller 10 is ≤0.02mm; the entire ink fountain device can also be removed from the two main wall panels of the printing press, which is convenient for replacement and maintenance of the entire ink fountain device.

[0025] The above embodiments are only used to illustrate the present invention, rather than to limit the present invention. Those skilled in the relevant technical field may make various changes or modifications without departing from the spirit and scope of the present invention. Therefore, all equivalent technical solutions should also belong to the scope of the present invention and should be defined by the claims.

Claims

1. An ink fountain device of a web printing press, comprising two ink fountain end plates, an ink fountain seat, an ink knife and multiple sets of ink volume adjustment mechanisms; the outer side surfaces of the two ink fountain end plates are respectively mounted on the inner sides of two main wall panels of the printing press through ink fountain end shafts in a one-to-one correspondence; the ink fountain seat is connected across the two ink fountain end plates, the top surface of the ink fountain seat is a downwardly inclined inclined surface, a rectangular upper notch is provided at the front end of the top surface of the ink fountain seat, and a rectangular lower notch is provided at the rear end of the bottom surface of the ink fountain seat; the ink knife is mounted on the top surface of the ink fountain seat, and the ink knife is divided into multiple sections of regional ink knives by multiple transverse cutting lines from a whole ink knife; multiple sets of ink volume adjustment mechanisms are mounted on the ink fountain seat in a one-to-one correspondence with the multiple sections of regional ink knives; it is characterized in that Each set of ink volume adjustment mechanism includes a top block hinge shaft, an ink knife top block, an ink key motor and a top rod; The top block hinge shaft is connected between the two ink fountain end plates of the ink fountain and is located at the upper part of the upper notch of the ink fountain seat; A hinge hole is provided on the upper side of the ink knife top block, so that the ink knife top block can be rotatably sleeved on the top block hinge shaft; The ink key motor is installed in the lower notch of the ink fountain seat through a motor mounting bracket; The push rod is connected to the rotating shaft of the ink key motor. The push rod is a screw and is installed in a threaded guide hole opened on the ink fountain seat. The front end of the push rod is against the lower rear end surface of the ink knife top block, so that the top front end of the ink knife top block is against the bottom front end of the ink knife in the corresponding area.

2. The ink fountain device of a web printing press according to claim 1, characterized in that: The ink knife is fixed on the top surface of an ink knife base plate, and two rear-threaded blind holes are provided on the rear end surface of the ink knife base plate; an ink knife mounting groove is provided in the middle part of the top surface of the ink fountain seat, and the ink knife base plate is installed in the ink knife mounting groove; two screw through holes are provided on the rear end surface of the ink fountain seat, which correspond to the two rear-threaded blind holes on the ink knife base plate one by one, and an ink knife adjusting screw is installed in each of the two screw through holes, and the two ink knife adjusting screws are screwed into the two rear-threaded blind holes on the ink knife base plate one by one; at least two bottom-threaded blind holes are provided on the bottom front of the ink knife base plate; two waist-shaped mounting holes corresponding to the two bottom-threaded blind holes on the ink knife base plate are provided on the ink fountain seat, and a fixing screw is installed in each of the two waist-shaped mounting holes, and the two fixing screws are screwed into the two bottom-threaded blind holes on the ink knife base plate one by one.

3. The ink fountain device of a web printing press according to claim 1, characterized in that: The ink key motor is mounted on the motor bracket through a connecting block.

4. The ink fountain device of a web printing press according to claim 1, characterized in that: The push rod is connected to the rotating shaft of the ink key motor through a coupling.

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