阅读说明：本技术 一种直接供墨给胶辊的防甩墨装置及其安装方法 (Ink throwing prevention device for directly supplying ink to rubber roller and installation method thereof ) 是由 项建龙 卢伟毅 葛赛均 王庆伟 于 2020-12-11 设计创作，主要内容包括：一种直接供墨给胶辊的防甩墨装置及其安装方法,包括出墨机构和墨辊,出墨机构与墨辊相适配,通过出墨机构直接注墨在墨辊上,出墨机构包括用于注墨至墨辊上的出墨组件和将墨辊上的油墨进行刮拭的墨辊压片组件,墨辊压片组件安装在出墨组件上,墨辊压片组件与墨辊相贴合,通过墨辊压片组件对墨辊上的油墨进行刮拭,从而使得墨辊上的油墨更为均匀的覆盖在墨辊的表面,并且可以有效减少墨辊表面的油墨滴聚集,从而防止印刷过程中发生甩墨现象,提高印刷质量,并且本防甩墨装置的结构更为简单,降低本装置生产成本。(The utility model provides an ink throwing prevention device that directly supplies ink to rubber roll and installation method thereof, including ink mechanism and ink roller, ink mechanism and ink roller looks adaptation go out, directly annotate the black on the ink roller through ink mechanism, ink mechanism includes the ink components that go out that is used for annotating black to on the ink roller and scrapes the ink roller preforming subassembly that wipes off with the ink on the ink roller, ink roller preforming subassembly is installed on ink components, ink roller preforming subassembly and ink roller are laminated mutually, scrape through ink roller preforming subassembly to the ink on the ink roller and wipe off, thereby make the more even surface that covers of ink on the ink roller, and can effectively reduce the ink droplet gathering on ink roller surface, thereby prevent to take place the ink throwing phenomenon among the printing process, improve printing quality, and this ink throwing prevention device's structure is simpler, reduce this device manufacturing cost.)

1. The utility model provides an ink throwing prevention device who directly supplies ink to rubber roll, including ink mechanism (1) and ink roller (2), ink mechanism (1) and ink roller (2) looks adaptation, its characterized in that, ink mechanism (1) is including coating ink to ink roller (2) on go out ink subassembly (3) and to ink roller preforming subassembly (4) that the ink on ink roller (2) scraped, ink roller preforming subassembly (4) are installed on ink subassembly (3), ink roller preforming subassembly (4) and ink roller (2) are laminated mutually.

2. The ink splashing prevention device for the direct ink supply rubber roller according to claim 1, wherein the ink outlet assembly (3) comprises an ink knife (5) and an ink outlet pressing sheet (6), the ink outlet pressing sheet (6) is fixedly arranged on the ink knife (5), and an ink outlet flow channel (7) is formed between the ink outlet pressing sheet (6) and the ink knife (5).

3. The ink throwing prevention device for the direct ink supply rubber roller according to claim 2, wherein the ink knife (5) is internally provided with a main flow channel (8) and an ink outlet chamber (9), the main flow channel (8) is communicated with the ink outlet chamber (9), and the ink outlet pressing sheet (6) is fixedly pressed on the ink outlet chamber (9).

4. The ink throwing prevention device for the direct ink supply rubber roller according to claim 3, wherein a flow guide surface (10) is arranged in the ink outlet cavity (9), and the opening of the main flow channel (8) is opposite to the flow guide surface (10).

5. The ink-throwing prevention device for the direct ink supply rubber roller according to claim 4, wherein a plurality of ink outlet channels (7) are dug in the ink outlet cavity (9), a middle channel plate (11) and a side channel plate (12) are formed between the adjacent ink outlet channels (7), the side channel plates (12) are symmetrically connected in the ink outlet cavity (9) relative to the middle channel plate (11), and the middle channel plate (11) and the main channel (8) are positioned on the same straight line.

6. The ink throwing prevention device for the direct ink supply rubber roller according to claim 5, wherein the upper end surface of the middle runner plate (11) is provided with a flow guide plane (13), the flow guide plane (13) is perpendicular to the main runner (8), the upper end surface of the side runner plate (12) is provided with a runner plate inclined surface (14), and the edge of the flow guide plane (13) and the runner plate inclined surface (14) are positioned on the same plane.

7. The ink throwing prevention device for the direct ink supply rubber roller is characterized in that the ink roller pressing piece assembly (4) comprises an ink fountain pressing piece (18) and an ink fountain piece (19), the ink fountain pressing piece (18) is fixedly arranged on the outer side of the ink discharging pressing piece (6), the ink fountain piece (19) is fixedly arranged between the ink fountain pressing piece (18) and the ink discharging pressing piece (6), and the ink fountain piece (19) is attached to the ink roller (2).

8. The ink throwing prevention device for the direct ink supply rubber roller as claimed in claim 7, wherein the ink fountain pressing sheet (18) comprises a pressing sheet part (23) and an arch part (24), the arch part (24) is fixedly connected to the end surface of the pressing sheet part (23) to form a spring installation cavity (25), and a pressing sheet spring (26) is installed in the spring installation cavity (25).

9. The ink throwing prevention device for the direct ink supply rubber roller as claimed in claim 2, wherein the lower end surface of the ink knife (5) is wedge-shaped, and the wedge angle of the ink knife (5) is 25-35 °.

10. The method for installing the ink throwing prevention device for the direct ink supply rubber roller according to any one of claims 1 to 9, comprising the following installation steps,

(1) cleaning the mounting surface of the ink knife, mounting the ink outlet pressing sheet close to the groove of the ink knife, and locking the ink outlet pressing sheet from the middle to two sides by using screws;

(2) carrying out surface grinding machine reprocessing on the ink knife wedge-shaped inclined surface;

(3) preparing a first ink fountain sheet and a second ink fountain sheet;

(4) attaching a layer of double-sided adhesive tape to the ink fountain pressing sheet, and attaching the first ink fountain sheet to the ink fountain pressing sheet;

(5) attaching a layer of double-sided adhesive tape to the first ink duct piece, and attaching the second ink duct piece to the first ink duct piece;

(6) mounting the attached ink roller pressing sheet assembly on the outer side of the ink discharging pressing sheet, and slightly locking and fixing the ink roller pressing sheet assembly by using a screw;

(7) forcibly locking the ink fountain pressing sheet from the middle of the ink knife, and locking the ink fountain pressing sheet to two ends regularly to form an ink outlet mechanism;

(8) the wedge-shaped surface of the ink outlet mechanism is attached to the ink roller, so that the ink duct piece is attached to the ink roller.

Technical Field

The invention belongs to the technical field of printing machines, and particularly relates to an ink throwing prevention device for directly supplying ink to a rubber roller and an installation method thereof.

Background

The printing industry has a long history, relates to the industries of publishing, packaging, paper products, plastics and the like, and is an important support for the development of the cultural industry. However, during the printing process, the ink is often thrown off under the action of centrifugal force due to the accumulation of ink on the rubber roller, so that ink mist is formed to scatter and pollute the environment, or the ink mist is thrown off to a paper transfer roller, a gripper bar and paper being printed to cause dirt.

The ink throwing is a common fault problem in the printing process, the formation reason is complex, and ink throwing can be caused by ink balance, temperature and humidity, printing pressure, printing speed and rubber roller aging. At present, the common solution is to regularly check the states of a printer and a rubber roller and clean ink, but the ink can only be relieved in a short period, and the problem cannot be fundamentally solved.

Besides, through consulting the literature, it is found that setting a baffle in the ink duct of the printing machine, or changing the structure of the ink roller can reduce the ink throwing or the influence caused by ink throwing. For example, the invention patent with the application number of 201420359817.3 discloses a non-ink-throwing printing roller, wherein the side surface of the printing roller comprises an ink filling hole which is communicated with a cavity in the roller, a sponge is placed in the cavity, and ink in the sponge seeps out along printing lines during printing. The invention patent with application number 201621361907.1 discloses a rubber roller for preventing ink throwing, wherein an irregular trapezoidal structure groove is processed on the surface of the rubber roller by laser, so that the ink absorption amount is increased, and the ink throwing is reduced. The invention patent application No. 201921066848.9 discloses an ink-throwing-proof ink fountain device of a printing press, wherein an ink transfer roller is arranged in an ink fountain box, and a rotatable ink transfer baffle plate is used for covering the ink transfer roller to block splashed ink. The two methods reduce printing ink throwing by changing partial structures, and have high cost and complex implementation.

Disclosure of Invention

In view of the above disadvantages, the technical problem to be solved by the present invention is to provide an ink-throwing prevention device for directly supplying ink to a rubber roller and an installation method thereof, which are used for preventing the ink-throwing phenomenon from occurring in the printing process and making the ink supplied by the ink supply device more stable and uniform.

In order to solve the technical problems, the invention adopts the technical scheme that,

the utility model provides a direct supplies black anti-swing black device of rubber roll that supplies, includes ink mechanism and ink roller, ink mechanism and ink roller looks adaptation, and ink mechanism is including going out black subassembly and ink roller preforming subassembly, and ink roller preforming subassembly is installed on going out black subassembly, and ink roller preforming subassembly laminates with the ink roller mutually.

Furthermore, the ink outlet assembly comprises an ink knife and an ink outlet pressing sheet, the ink outlet pressing sheet is fixedly arranged on the ink knife, and an ink outlet flow channel is formed between the ink outlet pressing sheet and the ink knife.

Furthermore, a main flow channel and an ink outlet cavity are dug in the ink knife, the main flow channel is communicated with the ink outlet cavity, an ink outlet pressing sheet is fixedly pressed on the ink outlet cavity, and an ink outlet flow channel is formed between the ink outlet pressing sheet and the ink outlet cavity.

Furthermore, a flow guide surface is arranged in the ink outlet cavity, and the opening of the main flow channel is opposite to the flow guide surface.

Furthermore, go out black intracavity fixedly connected with middle part runner plate and lateral part runner plate, lateral part runner plate is connected at a black intracavity relatively middle part runner plate symmetry, and middle part runner plate and sprue are in on the same straight line.

Furthermore, a flow guide plane is arranged on the upper end face of the middle flow channel plate and is perpendicular to the main flow channel, a flow channel plate inclined plane is arranged on the upper end face of the side flow channel plate, and the edge of the flow guide plane and the flow channel plate inclined plane are located on the same plane.

Further, ink roller preforming subassembly includes ink marker preforming and ink marker piece, and ink marker preforming fixed mounting is in the outside of going out the ink preforming, and ink marker piece fixed mounting is between ink marker preforming and the play ink preforming, and ink marker piece and ink roller laminating.

Furthermore, the ink fountain sheet comprises a first ink fountain sheet and a second ink fountain sheet, the first ink fountain sheet and the second ink fountain sheet are mutually attached, the extending ends of the first ink fountain sheet and the second ink fountain sheet are not attached, and the lower end of the first ink fountain sheet is lower than the lower end of the second ink fountain sheet.

Further, the ink fountain pressing sheet comprises a pressing sheet part and an arched part, the arched part is fixedly connected to the end face of the pressing sheet part to form a spring installation cavity, and a pressing sheet spring is installed in the spring installation cavity.

Furthermore, the ink fountain pressing piece is dug to be equipped with the through hole, and the through hole runs through pressing piece portion and arch portion, is installed elastic screw assembly in the through hole, and elastic screw assembly includes housing screw and gland nut, and the veneer is behind gland nut, the threaded connection of gland screw, the both ends of preforming spring support respectively to be established between gland nut and the play black preforming.

Furthermore, the lower end surface of the ink knife is in a wedge shape, and the wedge angle of the ink knife is 25-35 degrees.

The installation method of the ink throwing preventing device for the direct ink supply rubber roller comprises the following installation steps,

(1) preparing a first ink fountain sheet and a second ink fountain sheet;

(2) attaching a layer of double-sided adhesive tape to the ink fountain pressing sheet, and attaching the first ink fountain sheet to the ink fountain pressing sheet;

(3) attaching a layer of double-sided adhesive tape to the second ink duct sheet, and attaching the second ink duct sheet to the first ink duct sheet;

(4) slightly moving the ink fountain pressing sheet to ensure that the distance between the bottommost edge of the first ink fountain sheet and the knife point of the ink knife is 6 +/-0.5 mm, and slightly fastening screws to ensure that the relative distance between the pressing plate and the ink knife is unchanged;

(5) forcibly locking the ink fountain pressing piece, starting locking from the middle of the ink knife, locking the ink fountain pressing piece towards two ends according to a left rule and a right rule, and checking during the period: whether the distance between the bottom edge of the ink duct piece and the knife tip of the ink knife is 6 +/-0.5 MM or not is judged, and finally an ink roller pressing piece assembly is formed;

(6) fixedly mounting an ink roller tabletting assembly on an ink discharging assembly to form an ink discharging mechanism;

(7) the wedge-shaped surface of the ink outlet mechanism is attached to the ink roller, so that the ink duct piece is attached to the ink roller.

The ink throwing device has the advantages that the ink on the ink roller is scraped through the ink roller pressing piece assembly, so that the ink on the ink roller is more uniformly coated on the surface of the ink roller, the ink amount on the ink roller can be effectively reduced, the ink throwing phenomenon in the printing process is prevented, the printing quality is improved, the structure of the ink throwing device is simpler, and the production cost of the ink throwing device is reduced.

Drawings

Fig. 1 is a cross-sectional view of the present device.

Fig. 2 is a schematic structural view of the ink blade.

Fig. 3 is a sectional view of an ink discharge portion of the ink discharge device.

FIG. 4 is a schematic structural diagram of an ink outlet chamber according to an embodiment.

FIG. 5 is a sectional view of an ink discharge chamber according to the second embodiment.

FIG. 6 is a sectional view of an ink chamber according to a third embodiment.

FIG. 7 is a sectional view of an ink slinger using the four duct chip of the embodiment.

FIG. 8 is a front view of a four ink fountain press of an embodiment.

FIG. 9 is a rear view of a four ink fountain press of an embodiment.

Reference numerals: the ink discharging mechanism comprises an ink discharging mechanism 1, an ink roller 2, an ink discharging assembly 3, an ink roller pressing sheet assembly 4, an ink knife 5, an ink discharging pressing sheet 6, an ink discharging flow channel 7, a main flow channel 8, an ink discharging cavity 9, a flow guide surface 10, a middle flow channel plate 11, a side flow channel plate 12, a flow guide plane 13, a flow channel plate inclined plane 14, a first side flow channel plate 15, a second side flow channel plate 16, a bent part 17, an ink fountain pressing sheet 18, an ink fountain sheet 19, a first ink fountain sheet 20, a second ink fountain sheet 21, a mounting groove 22, a pressing sheet part 23, an arch part 24, a spring mounting cavity 25, a pressing sheet spring 26, a through hole 27, a pressing screw 28, a pressing nut 29 and a counter bore groove 30.

Detailed Description

The invention is further described below with reference to the accompanying drawings.

Example one

The utility model provides an ink throwing prevention device who directly supplies ink to rubber roll, including ink mechanism 1 and ink roller 2, ink mechanism 1 and ink roller 2 looks adaptation go out, directly annotate the black on ink roller 2 through ink mechanism 1, ink mechanism 1 includes the ink subassembly 3 that is used for annotating black to on ink roller 2 and scrapes the ink on the ink roller 4 that ink is scraped, ink roller pressure piece subassembly 4 is installed on ink subassembly 3, ink roller pressure piece subassembly 4 and ink roller 2 are laminated mutually, scrape through ink roller pressure piece subassembly 4 the ink on ink roller 2 and wipe off, thereby make the more even surface that covers at ink roller 2 of ink on ink roller 2, and can effectively reduce the ink droplet gathering on ink roller 2 surface, thereby prevent to take place the phenomenon of getting rid of the black in the printing process, improve the printing quality, and this ink throwing device's structure is simpler, reduce this device manufacturing cost.

Go out black subassembly 3 including ink sword 5 and play black preforming 6, go out black preforming 6 fixed mounting on ink sword 5, go out and form out black runner 7 between black preforming 6 and the ink sword 5, through the setting of going out black preforming 6, be convenient for process the chamber 9 that goes out black in the ink sword 5, improve the production efficiency of ink sword 5.

Dig in the ink sword 5 and be equipped with sprue 8 and play black chamber 9, sprue 8 and play black chamber 9 intercommunication, go out the fixed pressfitting of black preforming 6 on a black chamber 9, go out black preforming 6 and go out and form black runner 7 between the black chamber 9, setting through a black chamber 9, be convenient for carry out the water conservancy diversion to the printing ink in the sprue 8, the black runner 7 that goes out of being convenient for printing ink accessible evenly distributed flows, thereby make the more even filling of printing ink through this ink sword 5 play black on ink roller 2, further prevent that ink from piling up on the ink roller, thereby reduce the printing in-process and take place to get rid of black phenomenon, improve printing quality.

A flow guide surface 10 is arranged in the ink outlet cavity 9, and an opening of the main flow channel 8 is opposite to the flow guide surface 10, so that ink flowing into the ink outlet cavity 9 from the main flow channel 8 drops on the flow guide surface 10, and is guided by the flow guide surface 10, and the ink in the ink outlet cavity 9 uniformly flows out through the ink outlet channel 7.

In some preferred modes, the diversion surface 10 is an inclined surface, and the arrangement of the inclined diversion surface 10 facilitates diversion of dropped ink, so that the dropping speed of the ink can be reduced, the ink discharging width of the ink can be enlarged, and the ink knife 5 can more uniformly inject the ink to the ink roller 2.

Dig in going out the black chamber 9 and be equipped with a plurality of play black runners 7, be formed with middle part flow board 11 and lateral part flow board 12 between the adjacent play black runner 7, lateral part flow board 12 is in going out black chamber 9 relative middle part flow board 11 symmetric distribution, form out black runner 7 between the adjacent flow board, middle part flow board 11 is in same straight line with mainstream way 8, through the setting of middle part flow board 11, make the printing ink that the mainstream way flows to the both sides of middle part flow board 11 under the effect of water conservancy diversion face 10 flow.

The upper end face of the middle runner plate 11 is provided with a flow guide plane 13, the flow guide plane 13 is perpendicular to the main runner 8, the upper end face of the side runner plate 12 is provided with a runner plate inclined plane 14, and the edge of the flow guide plane 13 and the runner plate inclined plane 14 are positioned on the same plane.

In this embodiment, the first side flow channel plate 15 and the second side flow channel plate 16 are provided to form 6 uniformly distributed ink outlet channels 7 in the ink outlet chamber 9, preferably, the first side flow channel plate 15 is located between the second side flow channel plate 16 and the middle flow channel plate 11, and the first side flow channel plate 15 is provided with a bending portion 17 to make the path lengths of the ink outlet channels substantially equal, that is, the ink outlet channels 7 of the same main flow channel simultaneously discharge ink.

Ink roller preforming subassembly 4 includes ink duct preforming 18 and ink duct piece 19, ink duct preforming 18 fixed mounting is in the outside of going out ink preforming 6, ink duct piece 19 fixed mounting is between ink duct preforming 18 and play ink preforming 6, ink duct piece 19 and the laminating of ink roller 2, scrape through ink duct piece 19 the printing ink on to ink roller 2, make printing ink on the ink roller 2 more even, prevent that printing ink from piling up, be equipped with mounting groove 22 on the terminal surface of ink duct preforming 18, mounting groove 22 is used for carrying out fixed mounting to ink duct piece 19, in this embodiment, what ink duct preforming 18 adopted is the flat plate structure.

The ink fountain piece 19 comprises a first ink fountain piece 20 and a second ink fountain piece 21, the first ink fountain piece 20 and the second ink fountain piece 21 are mutually attached, the extending ends of the first ink fountain piece 20 and the second ink fountain piece 21 are not attached, the first ink fountain piece 20 and the second ink fountain piece 21 are elastically deformed under the action of the ink roller 2 and can be better attached to the ink roller 2, the lower end of the first ink fountain piece 20 is lower than the lower end of the second ink fountain piece 21, namely, the width of the first ink fountain piece 20 is larger than that of the second ink fountain piece 21, the attaching surface of the ink fountain piece 19 and the ink roller 2 is enlarged, ink can be better scraped, the optimization is realized, the width difference between the lower end of the first ink fountain piece 20 and the lower end of the second ink fountain piece 21 is 0.5-2.5 mm, along with the increase of the service life of the ink fountain pieces, the ink fountain pieces can be subjected to swinging abrasion or deformation, the double-sided ink prevention effect is influenced, the ink fountain pieces are fixedly installed through quick detachment and can be conveniently detached, and can be conveniently detached, And replacing the ink fountain sheet.

The lower end surface of the ink knife 5 is in a wedge shape, the wedge angle of the ink knife 5 is 25-35 degrees, preferably, the wedge angle of the ink knife 5 is 30 degrees, and the distance between the ink roller 2 and the ink outlet of the ink outlet channel 7 after installation is 0.03-0.5 mm.

In some preferred modes, the thickness of the tail end of each ink outlet channel 7 is 0.25-0.35 mm, the total width occupied by the ink outlet channel 7 corresponding to each main channel 8 is 15-28 mm, the width difference of each ink outlet channel 7 is not more than 1mm, the main channels are used as centers and are symmetrically distributed, and the channels are in various forms such as comb shapes, wing shapes and the like, so that the ink outlet amount of each ink outlet channel in unit time is ensured to be the same.

The installation method of the ink throwing preventing device for the direct ink supply rubber roller comprises the following installation steps,

(1) cleaning the mounting surface of the ink knife, wherein the surface of the mounting surface is free of ink and burrs, placing and filling the sealing strip in a natural state into the groove of the ink knife, placing the ink outlet pressing sheet on the ink knife, tightly attaching the top end of the ink outlet pressing sheet to the groove of the ink knife, mounting the ink outlet pressing sheet by using screws, and sequentially locking the ink outlet pressing sheet from the middle to one of the two sides from left to right for multiple times.

(2) And (4) carrying out surface grinding machine reprocessing on the ink knife wedge-shaped inclined surface to ensure the flatness and the roughness of the wedge-shaped inclined surface.

(3) Cutting a first ink fountain sheet with the width specification of 17MM +/-0.5 MM and a second ink fountain sheet with the width specification of 16MM +/-0.5 MM, deburring and polishing the edges of the first ink fountain sheet and the second ink fountain sheet, and cleaning the ink fountain sheets to ensure that the surfaces are free of contamination;

(4) attaching a layer of double-sided adhesive tape to the ink fountain pressing sheet, aligning the double-sided adhesive tape with the step edge of the mounting groove, flattening the whole ink fountain pressing sheet before tearing off the double-sided adhesive tape, ensuring that no bubble exists at the adhesive surface of the adhesive tape and the ink fountain pressing sheet, ensuring the adhesive strength, and attaching the first ink fountain sheet to the ink fountain pressing sheet;

(5) attaching a layer of double-sided adhesive tape to the first ink marker piece, aligning with the step edge of the mounting groove and the left side, flattening the whole ink marker piece, and attaching the second ink marker piece to the first ink marker piece;

(6) mounting the attached ink roller pressing piece assembly on the outer side of the ink outlet pressing piece, slightly locking and fixing the screw, slightly moving the ink fountain pressing piece to ensure that the distance between the bottommost edge of the first ink fountain piece and the knife point of the ink knife is 6 +/-0.5 mm, and slightly tightening the screw to ensure that the relative distance between the pressing plate and the ink knife is unchanged;

(7) forcibly locking the ink fountain pressing piece, starting locking from the middle of the ink knife, locking the ink fountain pressing piece towards two ends according to a left rule and a right rule, and checking during the period: whether the distance between the bottom edge of the ink duct piece and the knife tip of the ink knife is 6 +/-0.5 MM or not is judged, and finally the ink outlet mechanism is formed;

(8) the wedge-shaped surface of the ink outlet mechanism is attached to the ink roller, so that the ink duct piece is attached to the ink roller.

Example two

The flow guide surface 10 is of a multilayer stepped type, and ink in the main flow channel 8 enters the ink outlet flow channel 7 after being decelerated by the multilayer flow guide surface 10.

The rest of the structure is the same as that of the first embodiment.

EXAMPLE III

Only the middle runner plate 11 is fixedly connected in the ink outlet cavity 9, two symmetrical ink outlet runners 7 are formed in the ink outlet cavity 9, ink in the ink outlet cavity 9 can flow out through the two ink outlet runners 7 conveniently, and the ink outlet amount of each ink outlet runner 7 is more uniform.

The rest of the structure is the same as that of the first embodiment.

Example four

The ink fountain pressing sheet 18 comprises a pressing sheet part 23 and an arched part 24, the arched part 24 is fixedly connected to the end face of the pressing sheet part 23 to form a spring installation cavity 25, a pressing spring 26 is installed in the spring installation cavity 25, the pressing sheet part 23 is pressed on the ink knife 5 through the arrangement of the pressing spring 26, the installation strength of the ink fountain sheet 19 is improved, the ink fountain sheet 18 is prevented from falling off, and ink is prevented from seeping out of a threaded hole.

The ink fountain pressing sheet 18 is dug with a through hole 27, the through hole 27 penetrates through the pressing sheet part 23 and the arch part 24, an elastic screw component is installed in the through hole 26, the elastic screw component comprises a compression screw 28 and a compression nut 29, the compression nut 29 and the compression screw 28 are connected in a threaded mode and then glued, two ends of a pressing sheet spring 26 are respectively abutted between the compression nut 29 and the ink discharging pressing sheet 6, therefore, the ink discharging pressing sheet 6 is pressed on the ink knife 5, the installation strength of the ink discharging pressing sheet 6 is improved, and ink is prevented from leaking from the installation surfaces of the ink knife 5 and the ink discharging pressing sheet 6.

The end face of the ink fountain pressing sheet 18 is provided with a mounting groove 22 and a counter bore groove 30, the counter bore groove 30 is used for preventing the pressing sheet part 23 from interfering with a screw used for mounting the ink discharging pressing sheet 6, and the mounting groove 22 is used for fixedly mounting the ink fountain sheet 19.

The rest of the structure is the same as that of the first embodiment.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention; thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Although the terms corresponding to the reference numerals in the figures are used more herein, the possibility of using other terms is not excluded; these terms are used merely to more conveniently describe and explain the nature of the present invention; they are to be construed as being without limitation to any additional limitations that may be imposed by the spirit of the present invention.