CN115352189B

CN115352189B - Double-scraper circulating ink supply device for printing machine

Info

Publication number: CN115352189B
Application number: CN202211115631.9A
Authority: CN
Inventors: 熊伟斌; 高雪雯; 赵恒亮; 杨勇; 周玄波; 甘忆
Original assignee: Wuhan Vocational College Of Information Transmission
Current assignee: Wuhan Vocational College Of Information Transmission
Priority date: 2022-09-14
Filing date: 2022-09-14
Publication date: 2023-06-16
Anticipated expiration: 2042-09-14
Also published as: CN115352189A

Abstract

The invention discloses a double-scraper circulating ink supply device for a printer, which comprises a frame, a printing roller, an ink supply roller, an ink coating and scraping mechanism, an ink return mechanism and an ink supply mechanism, wherein: the ink supply cylinder body of the ink supply roller comprises an ink supply shaft and an ink supply sleeve sleeved outside the ink supply shaft; the ink coating and scraping mechanism comprises an ink scraping box and a plurality of spray heads which are arranged at the top of the ink scraping box at intervals; the front end of the ink scraping box is an arc-shaped surface, and the upper end and the lower end of the arc-shaped surface are respectively provided with a scraper; the ink return mechanism comprises an ink return groove with an inverted cone-shaped cross section; the ink supply mechanism comprises an ink storage tank, a first ink return pipeline of a feed back port of the ink storage tank, and a discharge port of the ink storage tank is communicated with a plurality of spray heads through the ink supply pipeline. The ink applying and scraping mechanism with a specific structural design is adopted, and the residual ink on the surface of the ink supply roller is scraped by the upper scraper and the lower scraper, so that the ink is dropped into the ink returning mechanism below, thereby conveniently and timely cleaning the ink supply roller, reducing ink accumulation and ensuring normal printing.

Description

Double-scraper circulating ink supply device for printing machine

Technical Field

The invention relates to the technical field of ink printing, in particular to a double-scraper circulating ink supply device for a printing machine.

Background

A printer is a machine that prints text and images; modern printers typically consist of mechanisms such as plate loading, inking, stamping, paper feeding (including folding). The working principle of the device is as follows: the characters and images to be printed are first made into printing plate, then mounted on a printer, then ink is applied to the places where the characters and images are on the printing plate by means of manual or printer, and then directly or indirectly transferred onto paper or other printing stock (such as textile, metal plate, plastic, leather, wood plate, glass and ceramic), so that the same printed matter as the printing plate can be reproduced. The invention and development of the printing machine play an important role in the spread of human civilization and culture.

But current lithography apparatus is when using, and it is inconvenient to clear up in time the printing ink on the ink supply roller, causes the printing ink to pile up easily, influences subsequent printing effect to at the in-process of ink supply, the inhomogeneous phenomenon of ink supply appears very easily, thereby leads to its practicality relatively poor.

Therefore, how to provide an ink supply mechanism capable of continuously supplying ink to a printing apparatus and timely cleaning ink on an ink supply roller has become a technical problem to be solved by those skilled in the art.

Disclosure of Invention

The invention provides a double-scraper circulating ink supply device for a printing machine, which can continuously supply ink to printing equipment and timely clean the ink on an ink supply roller to prevent the ink from accumulating.

In order to achieve the above purpose, the present invention adopts the following technical scheme:

the invention provides a double-scraper circulating ink supply device for a printer, which comprises a frame, a printing roller, an ink supply roller, an ink coating and scraping mechanism, an ink returning mechanism and an ink supply mechanism, wherein the ink supply roller, the ink coating and scraping mechanism, the ink returning mechanism and the ink supply mechanism are arranged on one side of the printing roller, and the ink supply mechanism comprises the following components:

the ink supply roller is arranged on the left side of the printing roller in parallel, the ink supply roller body comprises an ink supply shaft and an ink supply sleeve sleeved outside the ink supply shaft, the ink supply sleeve and the ink supply roller are tangentially arranged, and two ends of the ink supply shaft can be arranged on the rack in an adjustable mode;

the ink coating and scraping mechanism is arranged on the right lower side of the ink supply roller in parallel and comprises an ink scraping box and a plurality of spray heads arranged at the top of the ink scraping box at intervals; the front end of the ink scraping box is an arc-shaped surface, and the upper end and the lower end of the arc-shaped surface are respectively provided with a first scraper and a second scraper which are matched with the ink supply roller;

the ink return mechanism is arranged below the ink supply roller and comprises an ink return groove with an inverted conical cross section, and the bottom of the ink return groove is connected with the ink supply mechanism through a first ink return pipeline;

the ink supply mechanism comprises an ink storage tank, a feed back opening of the ink storage tank is communicated with the first ink return pipeline through a second ink return pipeline, and a discharge opening of the ink storage tank is communicated with a plurality of spray heads through ink supply pipelines.

Preferably, the frame includes first support square, second support square, third support square, fourth support square, backup pad and motor mounting panel, wherein:

the first support square tubes are arranged in a plurality of vertical arrays respectively to form a plurality of columns;

the plurality of second support square tubes are respectively and transversely welded with the lower ends of the plurality of first support square tubes of each column;

the plurality of third support square tubes are respectively and transversely welded with the upper ends of the plurality of first support square tubes of each column;

the plurality of the fourth supporting square tubes are respectively and longitudinally connected with two adjacent second supporting square tubes;

the two support plates are respectively and longitudinally arranged at the left end and the right end of the second support square tube, are symmetrically arranged, and are respectively provided with a first limit hole, a second limit hole and a third limit hole;

the motor mounting plate is arranged on two adjacent fourth supporting square tubes, is positioned at one end of the frame, and is provided with a driving motor.

More preferably, the frame further comprises a first connecting piece, a second connecting piece, a transmission belt and a driving motor, wherein:

the two first connecting pieces are respectively arranged at the left upper corner and the right upper corner of the printing roller, and the two ends of the first connecting pieces are respectively welded with the left support plate and the right support plate;

the second connecting piece is arranged above the printing roller, and two ends of the second connecting piece are respectively welded with the left and right supporting plates;

the driving belt is arranged at the outer side of one supporting plate, one end of the driving belt is connected with the printing roller, and the other end of the driving belt is connected with the driving motor;

the driving motor is detachably mounted on the motor mounting plate, and an output shaft of the driving motor is connected with the transmission belt.

Preferably, the printing roller comprises a printing cylinder body, a first rotating shaft, a first bearing, a first adjusting rod, a first lock nut and a first compression nut, wherein:

the two first rotating shafts are respectively arranged at two ends of the printing cylinder body and are movably arranged in the first limiting holes of the supporting plate;

the two first bearings are respectively rotatably sleeved at the end parts of the first rotating shaft and correspondingly arranged in the first limiting holes of the supporting plate;

the two first adjusting rods respectively penetrate through the first through holes at the top ends of the supporting plates, extend downwards into the first limiting holes, and are connected with the outer ring of the first bearing in a welding mode;

the first locking nut is positioned at the top of the supporting plate, and is sleeved at the upper end of the first adjusting rod through threads;

the first compression nut is located at the top of the first locking nut, and the thread bush is arranged at the upper end of the first adjusting rod.

Preferably, the ink supply roller includes an ink supply cylinder, a second rotating shaft, a second bearing, a second adjusting rod, a second lock nut, and a second compression nut, wherein:

the ink supply cylinder consists of an ink supply shaft and an ink supply sleeve, wherein the outer peripheral wall of the ink supply shaft is provided with a plurality of clamping grooves, and the inner peripheral wall of the ink supply sleeve is provided with a plurality of clamping blocks matched with the clamping grooves;

the two second rotating shafts are respectively arranged at two ends of the ink supply cylinder body and are movably arranged in the second limiting holes of the supporting plate;

the two second bearings are respectively rotatably sleeved at the end parts of the second rotating shaft and correspondingly arranged in the second limiting holes of the supporting plate;

the two second adjusting rods respectively penetrate through the second through holes at the top ends of the supporting plates, extend downwards into the second limiting holes and are connected with the outer ring of the second bearing in a welding mode;

the second locking nut is positioned at the top of the supporting plate, and is sleeved at the upper end of the second adjusting rod through threads;

the second compression nut is located at the top of the second locking nut, and the thread bush is arranged at the upper end of the second adjusting rod.

Preferably, the ink scraping box is a shell structure with a hollow cavity, the front end surface of the ink scraping box is an arc surface, the lower end of the ink scraping box is an inverted cone-shaped ink dropping cone, and the ink scraping box comprises:

the upper end of the arc-shaped surface is provided with a first scraper which protrudes upwards, the lower end of the arc-shaped surface is provided with a second scraper which protrudes upwards, and a plurality of first ink collecting holes communicated with the hollow cavity are uniformly distributed on the end surface of the arc-shaped surface;

an ink baffle is longitudinally arranged in the middle of the top end of the ink scraping box, an ink accumulation groove is formed between the inner side of the ink baffle and the second scraper, and an overflow groove communicated with the hollow cavity is formed between the outer side of the ink baffle and the rear end baffle;

the bottom of the ink drop cone is provided with a plurality of second ink collecting holes at intervals along the length direction of the ink drop cone, and the second ink collecting holes are communicated with the bottom of the hollow cavity and are positioned right above the ink return mechanism.

More preferably, the two ends of the ink scraping box are respectively provided with a side baffle, the side baffles are correspondingly positioned at the outer side of the ink supply cylinder, the outer side wall of the ink supply cylinder is provided with a fixed block, and the fixed block is correspondingly embedded in a third limiting hole of the supporting plate.

Preferably, the plurality of spray heads are respectively communicated with an ink supply transverse pipe through an ink supply branch pipe, and the middle part of the ink supply transverse pipe is communicated with an ink supply pipeline on the ink supply mechanism.

Preferably, the ink return mechanism further comprises a filter screen plate, wherein:

the filter screen plate can be detachably arranged at the top of the ink return groove, and a plurality of meshes are formed in the filter screen plate.

Preferably, the ink supply mechanism further includes an ink return circulation pump and an ink supply circulation pump, wherein:

the ink return circulating pump is arranged on the second ink return pipeline, and the ink supply circulating pump is arranged on the ink supply pipeline.

Compared with the prior art, the invention has the following technical effects:

(1) The front end face of the ink coating and scraping mechanism adopts an arc face corresponding to the printing roller, and a first scraper and a second scraper matched with the ink supply roller are respectively arranged at the upper end and the lower end of the arc face;

(2) The top of the ink applying and scraping mechanism adopts an ink baffle plate to respectively form an independent ink accumulation groove and an independent overflow groove at the front and rear parts, redundant ink sprayed on the ink roller through a nozzle is accumulated in the ink accumulation groove, the redundant ink is continuously and uniformly coated on the ink supply roller in the rotation process of the ink supply roller, when the ink in the ink accumulation groove is excessive, the ink can overflow to the overflow groove from the top of the ink baffle plate, the excessive ink in the ink accumulation groove is avoided, and the ink collected in the overflow groove is finally recovered into the ink returning mechanism through a hollow cavity for recycling;

(3) The printing roller and the ink supply roller on one side of the printing roller are respectively provided with a height adjusting mechanism, the height adjusting mechanisms adopt rotating shafts, bearings, adjusting rods, locking nuts and compression nuts which are respectively arranged at two ends of the printing roller and the ink supply roller, and the locking nuts and the compression nuts control the adjusting rods to move up and down so as to adjust the heights of the printing roller and the ink supply roller, so that double scrapers on the ink coating and scraping mechanism are tightly attached to the ink supply roller, and the defects of untimely ink cleaning and unclean scraping on the ink supply roller are overcome, thereby improving the printing effect of the printing roller;

(4) The ink return mechanism is arranged below the ink supply roller and the ink coating and scraping mechanism, adopts the inverted cone-shaped ink return groove, the filter screen plate for filtering impurities is arranged at the top of the ink return groove, and the filtered ink flows back into the ink supply mechanism through the pipeline, so that the automatic recovery and recycling of the printing ink are realized, the consumption of the ink is saved, and the production cost is reduced.

Drawings

FIG. 1 is a schematic perspective view of a dual doctor blade circulating ink supply apparatus for a printing press according to the present invention;

FIG. 2 is a schematic diagram showing a second perspective view of a dual doctor blade circulating ink supply apparatus for a printing machine according to the present invention;

FIG. 3 is a schematic view of a portion A of the dual doctor blade circulating ink supply apparatus for a printing press of FIG. 2 in accordance with the present invention in an enlarged partial schematic view;

FIG. 4 is a schematic perspective view of a dual doctor blade circulating ink supply apparatus for a printing press according to the third embodiment of the present invention;

FIG. 5 is a schematic diagram of a front view of a dual doctor blade circulation ink supply apparatus for a printing press according to the present invention;

FIG. 6 is a schematic top view of a dual doctor blade circulating ink supply apparatus for a printing press according to the present invention;

FIG. 7 is a schematic view of a part B of the dual doctor blade circulating ink supply apparatus for a printing machine of FIG. 6 in a partially enlarged configuration in accordance with the present invention;

FIG. 8 is a schematic left-hand view of a dual doctor blade circulation ink supply apparatus for a printing press according to the present invention;

FIG. 9 is a schematic cross-sectional view of a dual doctor blade circulating ink supply apparatus for a printing press of the present invention;

FIG. 10 is a schematic view of a partial enlarged structure of a portion C of the dual doctor blade circulating ink supply apparatus for a printing machine of FIG. 9 according to the present invention;

FIG. 11 is a schematic perspective view of a dual doctor blade circulation ink supply apparatus for a printing press of FIG. 9 according to the present invention;

FIG. 12 is a schematic view of a portion D of the dual doctor blade circulating ink supply apparatus for a printing press of FIG. 11 in accordance with the present invention in a partially enlarged configuration;

FIG. 13 is a schematic view of a hidden inking and wiping mechanism in a dual doctor blade circulating ink supply apparatus for a printing press according to the present invention;

FIG. 14 is a schematic view of a partial enlarged structure of portion E of the dual doctor blade circulating ink supply apparatus for a printing machine shown in FIG. 13, in accordance with the present invention;

FIG. 15 is a schematic view of the structure of an inking and wiping mechanism in a dual doctor blade circulating ink supply for a printing press according to the present invention;

FIG. 16 is a schematic view of an enlarged partial structure of portion F of the inking and wiping mechanism of the dual doctor blade circulating ink supply for the printing machine of FIG. 15 according to the present invention;

FIG. 17 is a schematic cross-sectional view of an inking and wiping mechanism in a dual doctor blade circulating ink supply for a printing press according to the present invention;

fig. 18 is a schematic bottom view of an inking and wiping mechanism in the dual doctor blade circulating ink supply for a printing press of fig. 17, according to the present invention.

Detailed Description

The present invention will be described in detail and in detail by way of the following examples, which are not intended to limit the scope of the invention, for better understanding of the invention.

In some embodiments, as shown in fig. 1 and 2, a dual doctor blade circulating ink supply for a printing press is provided, which basically includes a frame 100, a printing cylinder 200, an ink supply cylinder 300, an inking and wiping mechanism 400, an ink return mechanism 500, and an ink supply mechanism 600. The ink supply roller 300, the ink applying and scraping mechanism 400, the ink returning mechanism 500 and the ink supply mechanism 600 are installed on the frame 100 at a position on one side of the printing roller 200.

Specifically, as shown in fig. 2, 3, 6, 7, 11 and 13, the ink supply roller 300 is disposed in parallel at a left side position of the printing roller 200. The ink supply roller 300 comprises an ink supply cylinder 301, the ink supply cylinder 301 comprises an ink supply shaft 3011 and an ink supply sleeve 3012, and the ink supply sleeve 3012 is detachably sleeved outside the ink supply shaft 3011, so that the ink supply sleeve 3012 can be replaced conveniently. The ink supply sleeve 3012 is tangentially arranged with the ink supply roller 300, and two ends of the ink supply shaft 3011 are adjustably arranged on the frame 100.

And the surface of the ink supply sleeve 3012 adopts a sponge brush, so that sufficient ink can be uniformly absorbed, and the ink absorbed by the sponge brush is smeared on the surface of the printing roller 200 through the contact between the sponge brush and the surface of the printing roller 200, so that the ink supply process is completed.

As shown in fig. 2, 3, 5, 6, 7, 10, 12, 15, 16, 17 and 18, the ink-applying and scraping mechanism 400 is disposed in parallel at a position on the right lower side of the ink supply roller 300, the ink-applying and scraping mechanism 400 mainly includes an ink scraping box 401 and a plurality of spray heads 402 disposed at the top of the ink scraping box 401 at intervals, the spray heads 402 are disposed at intervals along the axial direction of the printing roller 200, and the spraying direction of the spray heads 402 is not perpendicular to the surface of the printing roller 200, specifically, the spraying direction of the spray heads 402 is toward the right lower surface of the printing roller 200.

The front end of the ink scraping box 401 is an arc-shaped surface 4011, the arc-shaped surface 4011 is correspondingly arranged on the right lower surface of the printing roller 200, a first scraper 40111 and a second scraper 40112 matched with the ink supply roller 300 are respectively arranged at the upper end and the lower end of the arc-shaped surface 4011, and ink on the surface of the printing roller 200 is scraped through the first scraper 40111 and the second scraper 40112 which are arranged up and down in sequence, so that the ink supply roller is cleaned in time effectively, and the ink cleaning efficiency is improved.

As shown in fig. 3, 4, 5, 9, 10, 11, 12 and 13, the ink returning mechanism 500 is provided as an ink recovery and storage mechanism at a position below the ink supply roller 300. The ink return mechanism 500 mainly comprises an ink return tank 501 with an inverted conical cross section, and the bottom of the ink return tank 501 is connected with the ink supply mechanism 600 through a first ink return pipeline 503 so as to circularly introduce the recovered ink in the ink return mechanism 500 into the ink supply mechanism 600 for recycling.

As shown in fig. 4, 5, 6, 11 and 13, the ink supply mechanism 600 is used as an ink supply mechanism of the double-doctor circulating ink supply device, and mainly comprises an ink tank 601, wherein a feed back port of the ink tank 601 is communicated with the first ink return pipeline 503 through a second ink return pipeline 602, and a discharge port is communicated with a plurality of spray heads 402 through an ink supply pipeline 604. Ink stored in the ink tank 601 is sprayed on the surface of the printing cylinder 200 through the spray head 402.

In some embodiments, as shown in fig. 2, 4 and 13, the rack 100 is used as a support platform of the dual doctor circulation ink supply device, and mainly includes a first support square tube 101, a second support square tube 102, a third support square tube 103, a fourth support square tube 104 and a support plate 105, where the first support square tube 101, the second support square tube 102, the third support square tube 103 and the fourth support square tube 104 all adopt galvanized square tubes.

Specifically, the first supporting square tubes 101 are arranged in a plurality of vertical arrays respectively to form a plurality of columns. The number of the second supporting square tubes 102 is several, and the lower ends of the first supporting square tubes 101 of each column are respectively and transversely welded and connected; the number of the third supporting square tubes 103 is several, and the upper ends of the first supporting square tubes 101 of each column are respectively and transversely welded and connected. And a plurality of fourth supporting square tubes 104 are respectively and longitudinally connected with two adjacent second supporting square tubes 102. The first supporting square pipe 101, the second supporting square pipe 102, the third supporting square pipe 103 and the fourth supporting square pipe 104 form a basic supporting frame of the rack 100.

The two support plates 105 are used as mounting brackets at two ends of the printing roller 200, the ink supply roller 300 and the ink applying and scraping mechanism 400, and are respectively and longitudinally arranged at the left end and the right end of the second support square 102, and the two support square are symmetrically arranged. And a first limiting hole 1051, a second limiting hole 1052 and a third limiting hole 1053 are respectively formed on the supporting plate 105 for installing the printing roller 200, the ink supply roller 300 and the inking and wiping mechanism 400.

In addition, the frame 100 further includes a first connection member 106, a second connection member 107, the motor mounting plate 108, a transmission belt 109, and a driving motor 110. The motor mounting plate 108 is disposed on two adjacent fourth support square tubes 104, which are located at one end of the frame 100, and on which a driving motor 110 is mounted. The motor mounting plates 108 are made of stainless steel plates and are welded or bolted to each other.

The two first connectors 106 are respectively disposed at the upper left corner and the upper right corner of the printing roller 200, and two ends of the first connectors are respectively welded to the left and right support plates 105. Preferably, the first connecting piece 106 is a stainless steel round tube, and two ends of the first connecting piece are welded to the supporting plates 105, so as to ensure stability of the left supporting plate 105 and the right supporting plate 105.

The second connecting member 107 is disposed above the printing roller 200, and two ends of the second connecting member are respectively welded to the left and right support plates 105. Preferably, the second connecting member 107 is made of stainless steel plate or i-steel, and both ends are welded to the top of the support plate 105.

The driving belt 109 is disposed at an outer side of the supporting plate 105, and has one end connected to the printing roller 200 and the other end connected to the driving motor 110. The driving motor 110 is detachably mounted on the motor mounting plate 108, and an output shaft thereof is connected with the driving belt 109. The driving motor 110 is started, and the driving belt 109 drives the ink supply roller 300 to rotate relative to the inking and scraping mechanism 400.

In some embodiments, as shown in fig. 2, 3, 4, 5, 8, 9, 13 and 14, the printing cylinder 200 includes a printing cylinder 201 and a first height adjusting mechanism disposed at both ends of the printing cylinder 201, and the first height adjusting mechanism is mainly composed of a first rotation shaft 202, a first bearing 203, a first adjusting lever 204, a first lock nut 205 and a first compression nut 206.

The two first rotating shafts 202 are respectively disposed at two ends of the printing cylinder 201, and movably disposed in the first limiting holes 1051 of the supporting plate 105, and the first limiting holes 1051 are square holes. The two first bearings 203 are rotatably sleeved at the end parts of the first rotating shaft 202, and are correspondingly arranged in the first limiting holes 1051 of the supporting plate 105, the printing cylinder 201 can move up and down in the first limiting holes 1051, and the rotation of the printing cylinder 201 is not affected by the arrangement of the first bearings 203.

The two first adjusting rods 204 respectively penetrate through the first through holes at the top ends of the supporting plates 105, and extend downwards into the first limiting holes 1051, the first adjusting rods 204 are bolts, the diameters of the bolts are smaller than the diameters of the first through holes, the first adjusting rods 204 can slide up and down in the first through holes, and the lower ends of the bolts are welded with the outer ring of the first bearing 203.

In order to realize the adjustment and control of the height of the first adjusting rod 204, a first locking nut 205 and a first compression nut 206 are arranged at the top end of the first adjusting rod 204, the first locking nut 205 is positioned at the top of the supporting plate 105, and the first locking nut 205 is sleeved at the upper end of the first adjusting rod 204 through threads; the first compression nut 206 is located at the top of the first lock nut 205, and is screwed on the upper end of the first adjusting rod 204.

When in use, the first adjusting rod 204 is controlled to move up and down through the first locking nut 205 and the first compression nut 206, so that the height of the printing roller 200 is synchronously adjusted by matching with the ink supply roller 300, and the printing requirement of the printing roller is met.

In some embodiments, as shown in fig. 2, 3, 4, 5, 7, 8, 9, 13 and 14, the ink supply roller 300 includes an ink supply roller body 301 and a second height adjustment mechanism disposed at both ends of the ink supply roller body 301, the second height adjustment mechanism mainly consisting of a second rotation shaft 302, a second bearing 303, a second adjustment lever 304, a second lock nut 305 and a second compression nut 306.

The ink supply cylinder 301 is composed of an ink supply shaft 3011 and an ink supply sleeve 3012, a plurality of clamping grooves are formed in the outer peripheral wall of the ink supply shaft 3011, and a plurality of clamping blocks matched with the clamping grooves are arranged on the inner peripheral wall of the ink supply sleeve 3012. The sponge brush is arranged on the surface of the ink supply sleeve 3012, so that sufficient ink can be uniformly absorbed, and the ink absorbed by the sponge brush is smeared on the surface of the printing roller 200 through the contact between the sponge brush and the surface of the printing roller 200, so that the ink supply process is completed.

Through the setting of draw-in groove and fixture block, can make ink supply cover 3012 rotate along with ink supply axle 3011, and when changing ink supply cover 3012, only need follow ink supply axle 3011 on axial take out ink supply cover 3012, and change new ink supply cover 3012 can, the maintenance of the ink supply barrel 301 of being convenient for.

The two second rotating shafts 302 are respectively disposed at two ends of the ink supply cylinder 301, and movably disposed in the second limiting holes 1052 of the support plate 105, and the second limiting holes 1052 are square holes. The two second bearings 303 are respectively rotatably sleeved at the end parts of the second rotating shaft 302, and correspondingly arranged in the second limiting holes 1052 of the supporting plate 105. The ink supply cylinder 301 can move up and down in the second limiting hole 1052, and the arrangement of the second bearing 303 does not affect the rotation of the ink supply cylinder 301.

The two second adjusting rods 304 respectively extend into the second limiting holes 1052 through the second through holes at the top ends of the supporting plates 105 at the lower ends, and are connected with the outer ring of the second bearing 303 in a welding manner; the first adjusting rod 204 adopts a bolt, the diameter of the bolt is smaller than the aperture of the first through hole, so that the first adjusting rod 204 can slide up and down in the first through hole, and the lower end of the bolt is welded with the outer ring of the first bearing 203.

In order to realize the adjustment and control of the height of the second adjusting rod 304, the second locking nut 305 is located at the top of the supporting plate 105, and is screwed on the upper end of the second adjusting rod 304; the second compression nut 306 is located at the top of the second lock nut 305, and is screwed on the upper end of the second adjusting rod 304.

When the ink supply roller is used, the second adjusting rod 304 is controlled to move up and down through the second locking nut 305 and the second compression nut 306, so that the height of the ink supply roller 300 is adjusted, the double scrapers on the ink applying and scraping mechanism 400 are tightly attached to the ink supply roller 300, the defects of untimely ink cleaning and uncleanness scraping on the ink supply roller 300 are overcome, and the printing effect of the printing roller is improved.

In some embodiments, as shown in fig. 9, 10, 11, 12, 15, 16, 17 and 18, the ink scraping box 401 is a shell structure with a hollow cavity 4019, the front end surface of the shell structure is an arc-shaped surface 4011, and the lower end of the shell structure is an inverted cone-shaped ink dropping cone 4012.

Specifically, a first scraper 40111 protruding upwards is disposed at the upper end of the arc surface 4011, a second scraper 40112 protruding upwards is disposed at the lower end of the arc surface 4011, a plurality of first ink collecting holes 4018 communicating with the hollow cavity 4019 are uniformly distributed on the end surface of the arc surface, and the first scraper 40111 and the second scraper 40112 are closely attached to the surface of the ink supply roller 300. The ink scraped off by the first scraper 40111 drops down the front end face of the ink drop cone 4012 at the lower end thereof into the ink return mechanism 500.

In use, ink scraped by the second scraper 40112 drops from the second ink collecting hole 4020 at the bottom of the ink drop cone 4012 into the ink return mechanism 500 through the first ink collecting hole 4018 and the hollow cavity 4019.

The ink scraping box 401 is of an integrated structure, and is made of stainless steel or aluminum alloy, an ink baffle 4013 is longitudinally arranged in the middle of the top end of the ink scraping box, an ink accumulation groove 4014 is formed between the inner side of the ink baffle 4013 and the second scraper 40112, and an overflow groove 4015 communicated with the hollow cavity 4019 is formed between the outer side of the ink baffle 4013 and the rear end of the ink scraping box, namely, the top of the ink scraping mechanism 400 is provided with the ink baffle 4013, and the front part and the rear part of the ink scraping box respectively form the independent ink accumulation groove 4014 and the overflow groove 4015.

In use, excess ink sprayed by the nozzle 402 onto the ink feed roller 300 accumulates in the ink reservoir 4014, and during rotation of the ink feed roller 300, ink in the ink reservoir 4014 is continuously and uniformly applied to the ink feed roller 300. And when the ink in the ink accumulation groove 4014 is excessive, the ink can overflow into the overflow groove 4015 from the top of the ink baffle 4013, so that the excessive ink in the ink accumulation groove 4014 is avoided, and the ink collected in the overflow groove 4015 is finally recovered into the ink return mechanism 500 from the bottom of the ink drop cone 4012 through the hollow cavity 4019.

Specifically, the bottom of the ink drop cone 4012 is provided with a plurality of second ink collecting holes 4020 at intervals along the length direction thereof, the second ink collecting holes 4020 are communicated with the bottom of the hollow cavity 4019 and are located right above the ink return mechanism 500, and ink scraped by the second scraper 40112 and ink in the overflow groove 4015 are conveniently recovered through the arrangement of the hollow cavity 4019 and the second ink collecting holes 4020.

In addition, side baffles 4016 are respectively arranged at two ends of the ink scraping box 401, the side baffles 4016 are correspondingly positioned at the outer side of the ink supply cylinder 301, a fixing block 4017 is arranged on the outer side wall of the ink supply cylinder, and the fixing block 4017 is correspondingly embedded in the third limiting hole 1053 of the supporting plate 105.

In some embodiments, as shown in fig. 1, 2, 3, 6, 7, 15, 17 and 18, a plurality of the nozzles 402 are respectively communicated with an ink supply horizontal tube 404 through an ink supply branch tube 403, and the middle part of the ink supply horizontal tube 404 is communicated with an ink supply pipeline 604 on the ink supply mechanism 600, so that the ink in the ink supply mechanism 600 can be respectively delivered to each nozzle 402 through the ink supply horizontal tube 404 and the ink supply branch tube 403, and the ink supply to each nozzle 402 is realized.

In some of these embodiments, as shown in fig. 9, 10, 11, 12, and 13, the ink return mechanism 500 further includes a filter screen plate 502. The filter screen plate 502 can be dismantled and set up in the top of returning the china ink groove 501, just a plurality of meshes have been seted up on the filter screen plate 502 for filtering impurity, the printing ink after the filter screen plate 502 filters flows back to in the ink feed mechanism 600 through the pipeline, realizes the automatic recovery and the recycle of printing ink, has practiced thrift the quantity of printing ink, has reduced manufacturing cost.

In one embodiment, as shown in fig. 2, 4, 5, 6 and 13, the ink supply mechanism 600 further includes an ink return circulation pump 603 and an ink supply circulation pump 605. Wherein the ink return circulation pump 603 is mounted on the second ink return pipe 602, and the ink recovered in the ink return tank 501 and filtered by the ink return circulation pump 603 is delivered to the ink tank 601. And the ink supply circulation pump 605 is mounted on the ink supply pipe 604, and ink in the ink tank 601 is supplied to each head 402 by the ink supply circulation pump 605.

The invention adopts the ink-coating and scraping mechanism 400 with a specific structural design, the front end surface of the ink-coating and scraping mechanism 400 adopts an arc surface corresponding to a printing roller, and a first scraper and a second scraper which are matched with the ink-supplying roller 300 are respectively arranged at the upper end and the lower end of the arc surface, and the ink-supplying roller can be contacted with the first scraper and the second scraper by adjusting the ink-supplying roller up and down, so that the residual ink on the surface of the ink-supplying roller is scraped by the upper scraper and the lower scraper and falls into an ink-returning mechanism below, thereby conveniently cleaning the ink-supplying roller in time, reducing the ink accumulation and ensuring the normal printing.

The above description of the specific embodiments of the present invention has been given by way of example only, and the present invention is not limited to the above described specific embodiments. Any equivalent modifications and substitutions for the present invention will occur to those skilled in the art, and are also within the scope of the present invention. Accordingly, equivalent changes and modifications are intended to be included within the scope of the present invention without departing from the spirit and scope thereof.

Claims

1. The utility model provides a two scraper circulation ink supply device for printing machine, includes frame (100) and printing roller (200), its characterized in that still including set up in ink supply roller (300), inking scraping mechanism (400), ink return mechanism (500) and ink supply mechanism (600) of printing roller (200) one side, wherein:

the ink supply roller (300) is arranged on the left side of the printing roller (200) in parallel, the ink supply roller (301) comprises an ink supply shaft (3011) and an ink supply sleeve (3012) sleeved outside the ink supply shaft (3011), the ink supply sleeve (3012) is tangentially arranged with the ink supply roller (300), and two ends of the ink supply shaft (3011) are adjustable and arranged on the frame (100);

the ink applying and scraping mechanism (400) is arranged on the right lower side of the ink supply roller (300) in parallel and comprises an ink scraping box (401) and a plurality of spray heads (402) arranged at the top of the ink scraping box (401) at intervals; the front end of the ink scraping box (401) is an arc-shaped surface (4011), and a first scraper (40111) and a second scraper (40112) which are matched with the ink supply roller (300) are respectively arranged at the upper end and the lower end of the arc-shaped surface (4011);

the ink return mechanism (500) is arranged below the ink supply roller (300) and comprises an ink return groove (501) with an inverted conical cross section, and the bottom of the ink return groove (501) is connected with the ink supply mechanism (600) through a first ink return pipeline (503);

the ink supply mechanism (600) comprises an ink storage tank (601), a feed back opening of the ink storage tank (601) is communicated with the first ink return pipeline (503) through a second ink return pipeline (602), and a discharge opening is communicated with a plurality of spray heads (402) through ink supply pipelines (604);

the ink supply roller (300) comprises an ink supply cylinder (301), a second rotating shaft (302), a second bearing (303), a second adjusting rod (304), a second locking nut (305) and a second compression nut (306), wherein:

the ink supply cylinder (301) consists of an ink supply shaft (3011) and an ink supply sleeve (3012), wherein a plurality of clamping grooves are formed in the peripheral wall of the ink supply shaft (3011), and a plurality of clamping blocks matched with the clamping grooves are arranged on the inner peripheral wall of the ink supply sleeve (3012);

the two second rotating shafts (302) are respectively arranged at two ends of the ink supply cylinder body (301) and are movably arranged in the second limiting holes (1052) of the supporting plate (105);

the two second bearings (303) are respectively rotatably sleeved at the end parts of the second rotating shaft (302) and correspondingly arranged in second limiting holes (1052) of the supporting plate (105);

the two second adjusting rods (304) respectively penetrate through second through holes at the top end of the supporting plate (105) to extend downwards into the second limiting holes (1052) and are connected with an outer ring of the second bearing (303) in a welding mode;

the second locking nut (305) is positioned at the top of the supporting plate (105), and is sleeved at the upper end of the second adjusting rod (304) through threads;

the second compression nut (306) is positioned at the top of the second locking nut (305), and is sleeved at the upper end of the second adjusting rod (304) through threads;

the ink scraping box (401) is of a shell structure with a hollow cavity (4019), the front end face of the ink scraping box is an arc-shaped face (4011), the lower end of the ink scraping box is an inverted cone-shaped ink dropping cone (4012), and the ink scraping box comprises:

the upper end of the arc-shaped surface (4011) is provided with a first scraper (40111) protruding upwards, the lower end of the arc-shaped surface is provided with a second scraper (40112) protruding upwards, and a plurality of first ink collecting holes (4018) communicated with the hollow cavity (4019) are uniformly distributed on the end surface of the arc-shaped surface;

an ink baffle (4013) is longitudinally arranged in the middle of the top end of the ink scraping box (401), an ink accumulation groove (4014) is formed between the inner side of the ink baffle (4013) and the second scraper (40112), and an overflow groove (4015) communicated with the hollow cavity (4019) is formed between the outer side of the ink baffle and the rear end baffle;

the bottom of the ink drop cone (4012) is provided with a plurality of second ink collecting holes (4020) at intervals along the length direction, and the second ink collecting holes (4020) are communicated with the bottom of the hollow cavity (4019) and are located at positions right above the ink return mechanism (500).

2. The dual doctor circulation ink supply device for a printing press according to claim 1, wherein the frame (100) comprises a first support square (101), a second support square (102), a third support square (103), a fourth support square (104), a support plate (105) and a motor mounting plate (108), wherein:

the first support square tubes (101) are arranged in a plurality of vertical arrays respectively to form a plurality of columns;

the number of the second supporting square tubes (102) is several, and the lower ends of the first supporting square tubes (101) of each row are respectively and transversely welded and connected;

the number of the third supporting square tubes (103) is several, and the upper ends of the first supporting square tubes (101) of each row are respectively and transversely welded and connected;

the number of the fourth supporting square tubes (104) is several, and two adjacent second supporting square tubes (102) are respectively and longitudinally connected;

the two support plates (105) are respectively and longitudinally arranged at the left end and the right end of the second support square tubes (102), are symmetrically arranged, and are respectively provided with a first limiting hole (1051), a second limiting hole (1052) and a third limiting hole (1053);

the motor mounting plates (108) are arranged on two adjacent fourth supporting square tubes (104), are positioned at one end of the frame (100), and are provided with driving motors (110).

3. The dual doctor blade circulation ink supply for a printing machine according to claim 2, wherein the frame (100) further comprises a first connection (106), a second connection (107), a drive belt (109) and a drive motor (110), wherein:

the two first connecting pieces (106) are respectively arranged at the left upper corner and the right upper corner of the printing roller (200), and the two ends of the two first connecting pieces are respectively welded with the left support plate (105) and the right support plate;

the second connecting piece (107) is arranged above the printing roller (200), and two ends of the second connecting piece are respectively welded with the left supporting plate (105) and the right supporting plate (105);

the transmission belt (109) is arranged at the outer side of one supporting plate (105), one end of the transmission belt is connected with the printing roller (200), and the other end of the transmission belt is connected with the driving motor (110);

the driving motor (110) is detachably mounted on the motor mounting plate (108), and an output shaft of the driving motor is connected with the transmission belt (109).

4. The dual doctor blade circulation ink supply for a printing press as claimed in claim 1, wherein the printing cylinder (200) comprises a printing cylinder (201), a first rotary shaft (202), a first bearing (203), a first adjustment lever (204), a first lock nut (205) and a first compression nut (206), wherein:

the two first rotating shafts (202) are respectively arranged at two ends of the printing cylinder body (201) and are movably arranged in first limiting holes (1051) of the supporting plate (105);

the two first bearings (203) are respectively rotatably sleeved at the end parts of the first rotating shaft (202) and correspondingly arranged in first limiting holes (1051) of the supporting plate (105);

the two first adjusting rods (204) respectively penetrate through the first through holes at the top ends of the supporting plates (105) and extend downwards into the first limiting holes (1051), and are connected with the outer ring of the first bearing (203) in a welding mode;

the first locking nut (205) is positioned at the top of the supporting plate (105), and is sleeved at the upper end of the first adjusting rod (204) through threads;

the first compression nut (206) is located at the top of the first locking nut (205), and is sleeved at the upper end of the first adjusting rod (204) through threads.

5. The double-scraper circulating ink supply device for the printer according to claim 1, wherein side baffles (4016) are respectively arranged at two ends of the ink scraping box (401), the side baffles (4016) are correspondingly positioned at the outer side of the ink supply cylinder (301), fixing blocks (4017) are arranged on the outer side walls of the side baffles, and the fixing blocks (4017) are correspondingly embedded in third limiting holes (1053) of the supporting plate (105).

6. The double doctor circulating ink supply apparatus for a printing machine according to claim 1, wherein the plurality of nozzles (402) are respectively communicated with an ink supply horizontal tube (404) through ink supply branch tubes (403), and a middle part of the ink supply horizontal tube (404) is communicated with an ink supply pipeline (604) on the ink supply mechanism (600).

7. The dual doctor blade circulation ink supply for a printing press as claimed in claim 1, wherein the ink return mechanism (500) further comprises a filter screen (502), wherein:

the filter screen plate (502) is detachably arranged at the top of the ink return groove (501), and a plurality of meshes are formed in the filter screen plate (502).

8. The dual doctor blade circulating ink supply for a printing machine according to claim 1, wherein the ink supply mechanism (600) further comprises an ink return circulation pump (603) and an ink supply circulation pump (605), wherein:

the ink return circulation pump (603) is mounted on the second ink return pipe (602), and the ink supply circulation pump (605) is mounted on the ink supply pipe (604).