CN220409939U - Ink scraping device and flexographic printing machine - Google Patents

Abstract

The utility model relates to the field of label printing, in particular to an ink scraping device and a flexographic printing machine, which comprise two opposite supporting plates, wherein sliding blocks are connected to opposite side surfaces of the two supporting plates in a sliding manner, a supporting seat is fixedly connected between the two sliding blocks, a scraper is arranged on the supporting seat, screw units are arranged on the two supporting plates, each screw unit comprises a screw and a screw seat, the screw seats are rotationally connected with the screw, the screw is in threaded connection with the sliding blocks, chain wheels are fixedly arranged on the two screws, and a chain is connected between the two chain wheels. The thickness adjustment uniformity of the doctor blade to the inking roller is realized.

Description

Ink scraping device and flexographic printing machine

Technical Field

The utility model relates to the field of label printing, in particular to an ink scraping device and a flexographic printing machine.

Background

Flexographic printing machines are machines that print a substrate with liquid ink by transferring ink through an anilox roller using a flexible photosensitive resin plate and a rubber plate as a base material. It can be applied to the printing of labels. The prior flexographic printing machine comprises a discharging unit, a tension control unit, a traction feeding unit, a printing unit, a drying unit, a rolling traction unit, a material receiving unit and other main units. The whole machine is controlled by the PLC system in a centralized way, and has the characteristics of reasonable structure, high printing speed, simplicity in operation and the like.

The printing unit comprises a printing roller, an inking roller and an ink scraping device, wherein after the inking roller dips ink from the ink box, the inking roller is attached to the printing roller, so that the ink is transferred into the printing roller, and the printing roller prints a printing stock.

In order to ensure the printing quality, the quantity of the ink transferred from the inking roller to the printing roller is moderate, so that after the inking roller dips more ink from the ink box, the excessive ink needs to be scraped by a scraper on the ink scraping device, so that the thicker ink on the inking roller is avoided due to the thicker ink on the printing roller, and the printing quality is ensured.

However, when labels of different specifications, types and types are printed, the degree of color shade of the printed labels is different, so that the ink quantity on the printing roller is required to be adjusted, and in the prior art, the adjustment mode is to adjust the scraped quantity of the ink on the inking roller by adjusting the gap between the scraper and the inking roller, so that the adjustment of the ink quantity on the printing roller is indirectly realized.

The current gap adjustment mode between the scraper and the inking roller is as follows: the screws at the two ends of the scraper are respectively screwed to drive the scraper to move, so that the gap between the scraper and the inking roller is adjusted, and the thickness of the inking roller is adjusted. However, since the two ends of the doctor blade are respectively adjusted, when the two ends of the doctor blade are manually adjusted, the distance between each adjustment and movement of the two ends of the doctor blade cannot be guaranteed to be equal, so that the doctor blade is in a certain inclined state, the thickness difference of the inking roller ink is affected (the thickness of the ink at the position where the distance between the doctor blade and the inking roller is relatively close is small, and the thickness of the ink at the position where the distance between the doctor blade and the inking roller is relatively far is large), and the printing quality is uneven. In order to ensure the uniformity of the thickness of the ink at different parts of the inking roller after the scraper moves, the two ends of the scraper need to be adjusted for many times each time when the screw is adjusted until the requirements are met, so that the experience and the capability of an adjuster are tested, and the adjustment is troublesome.

Disclosure of Invention

The utility model aims to provide an ink scraping device and a flexographic printing machine so as to realize uniformity and consistency of thickness adjustment of ink at different positions on an inking roller.

In order to achieve the above purpose, the utility model adopts the following technical scheme: the ink scraping device comprises two opposite supporting plates, sliding blocks are connected to opposite side surfaces of the two supporting plates in a sliding mode, a supporting seat is fixedly connected between the two sliding blocks, a scraper is installed on the supporting seat, screw units are installed on the two supporting plates, each screw unit comprises a screw and a screw seat, the screw seats are rotationally connected with the screw, the screws are in threaded connection with the sliding blocks, chain wheels are fixedly arranged on the two screws, and a chain is connected between the two chain wheels.

The principle and the advantages of the scheme are as follows: the backup pad in this scheme is used for supporting ink scraping device. The supporting seat is used for installing a scraper, and the scraper is opposite to the inking roller and is used for scraping redundant ink on the inking roller. The sliding block in this scheme can slide in the backup pad, and the screw rod seat is used for supporting the screw rod, and the screw rod rotates to be connected on the screw rod seat, and the screw rod can only rotate on the screw rod seat, and the screw rod can not be at axial displacement on the screw rod seat. Through rotating one of the screws, the screw drives the chain wheel to rotate, and the chain wheel drives the other chain wheel to rotate through the chain, so that the other screw is driven to rotate, and synchronous rotation of the two screws is realized.

Because screw rod and sliding block threaded connection to sliding block and backup pad sliding connection, therefore when the screw rod rotated, two screw rods drove corresponding sliding block and remove, and two sliding blocks together drive the scraper and remove, have realized the regulation in clearance between scraper and the inking roller, can adjust the striking off thickness of ink. Because two screw rods synchronous rotation, the sliding blocks on two sides of the supporting seat also synchronously move, so that the two ends of the scraper synchronously move, the problem of uneven scraping caused by asynchronous movement of the two ends of the scraper can be avoided, the thickness adjustment of the ink on different parts of the inking roller is uniform and consistent, the scraper is not required to be debugged for many times, the operation is simple and convenient, and the printing quality is ensured.

Preferably, as a modification, the end of the screw is fixedly connected with a rotating cap. The arrangement of the rotating cap is convenient for rotating the end part of the screw rod.

Preferably, as an improvement, a fixing block is arranged on the supporting plate, and a first groove is arranged on the fixing block; the screw rod seat is fixedly connected in the first groove.

The fixed block is used for fixing the screw rod seat, and the first groove is used for placing the screw rod seat, so that the screw rod seat cannot be arranged in a protruding mode, and the space occupation of the screw rod seat can be reduced. Meanwhile, the two sides of the screw rod seat can be surrounded by the first groove, the screw rod seat is limited by the first groove, and the screw rod seat is located on the fixed block and is stable.

Preferably, as a modification, the screw seat is fixed in the first recess by a screw or a bolt. Thereby, the screw seat is fixed in the first recess by means of a screw or bolt.

Preferably, as a modification, the fixed block is provided with a second groove, and the sliding block is slidably located in the second groove.

Therefore, the second groove is used for placing the sliding block, so that the sliding block cannot be arranged in a protruding mode, and the space occupation of the sliding block can be reduced.

Preferably, as a modification, the first groove and the second groove communicate. From this, first recess and second recess intercommunication can install slider and screw rod unit simultaneously on the fixed block, can not hinder slider and screw rod unit simultaneously to install on the fixed block because first recess and second recess do not communicate.

Preferably, as an improvement, the supporting seat is fixedly connected with a pressing block, and the scraper is positioned between the pressing block and the supporting seat. The pressing block is used for pressing the scraper on the supporting seat. The setting of briquetting for the scraper is located more stably on the supporting seat.

Preferably, as an improvement, the device further comprises a tensioning wheel, wherein the tensioning wheel is connected with the chain. Thereby, the tensioner is used to tension the chain so that the chain can function normally.

Preferably, as an improvement, the device further comprises a fixed plate, wherein the fixed plate is connected with a tensioning adjusting block in a sliding manner, an adjusting bolt is connected between the tensioning adjusting block and the fixed plate, and the tensioning wheel is rotationally connected to the tensioning adjusting block.

From this, through rotating adjusting bolt to drive tensioning regulating block and remove, tensioning regulating block drives the take-up pulley and removes, thereby adjusts the tensioning degree of take-up pulley. Through making take-up pulley tensioning degree loose to can take off the chain, two screw rods can cancel the linkage this moment, rotate respectively through two screw rods, thereby can adjust the both ends of scraper respectively, with correcting the inclination of scraper. After correction, the chain is mounted on the chain wheel and the tensioning wheel, and the tensioning wheel is used for tensioning the chain by enabling the tensioning adjusting block to move.

In order to achieve the above purpose, the present utility model further adopts the following technical scheme: a flexographic printing machine comprising an ink scraping device as claimed in any one of the preceding claims.

Thereby, the ink scraping device is applied to the flexographic printing machine, so that the flexographic printing machine has the corresponding function and effect of the ink scraping device. This patent not only protects the ink scraping device, but also protects the flexographic printing machine applying the ink scraping device.

Drawings

Fig. 1 is a perspective view of the ink scraping device.

Fig. 2 is an enlarged view of a in fig. 1.

Fig. 3 is a schematic view of a chain connecting two screws.

Fig. 4 is a schematic view of the tensioning degree of the chain adjusted by the tensioning adjustment block in the embodiment 2.

Detailed Description

The following is a further detailed description of the embodiments:

reference numerals in the drawings of the specification include: the ink box comprises a supporting plate 1, an ink box 2, an inking roller 3, a scraper 4, a pressing block 5, a supporting seat 6, a first fixing screw 7, a fixing block 8, a sliding block 9, a rotating cap 10, a screw seat 11, a chain wheel 12, a screw 13, a second fixing screw 14, a fixing plate 15, a tensioning adjusting block 16, an adjusting bolt 17, a tensioning wheel 18 and a sliding chute 19.

Example 1

Substantially as shown in figures 1 to 3 of the accompanying drawings: the ink scraping device comprises two opposite supporting plates 1, an inking roller 3 is rotatably connected between the two supporting plates 1, and the end part of the inking roller 3 is rotatably connected with the supporting plates 1 through bearings. The ink box 2 is arranged below the inking roller 3, an opening is arranged at the top of the ink box 2, ink is arranged inside the ink box 2, and the bottom of the inking roller 3 is positioned in the ink box 2 and can dip the ink in the ink box 2.

The opposite side surfaces of the two support plates 1 are fixed with obliquely placed fixing blocks 8 through bolts, and the two fixing blocks 8 are oppositely arranged. The opposite side surfaces of the two support plates 1 are both connected with sliding blocks 9 in a sliding manner that: the upper side of the fixed block 8 is provided with a second groove, the second grooves on the two fixed blocks 8 are opposite, and the sliding block 9 is positioned in the second groove and can slide in the second groove along the inclined direction of the fixed block 8. The two sliding blocks 9 are fixedly connected (such as welded or fixed by screws) with a supporting seat 6, and the supporting seat 6 is provided with a scraper 4, and the specific installation mode is as follows: be equipped with briquetting 5 on the supporting seat 6, scraper 4 installs between briquetting 5 and supporting seat 6, is connected with first set screw 7 between briquetting 5 and the supporting seat 6, through the fixed of first set screw 7, briquetting 5 and supporting seat 6 carry out the centre gripping to scraper 4 to realized the fixed of scraper 4. There is a gap between the end of the doctor blade 4 and the inking roller 3 of 0.1-0.5mm.

Screw units are mounted on the two support plates 1, each screw unit comprises a screw 13 and a screw seat 11, a smooth section of the screw 13 penetrates through the screw seat 11 and is rotationally connected to the screw seat 11 through a bearing, a threaded hole is formed in the sliding block 9, and a threaded section of the screw 13 enters the threaded hole and is in threaded connection with the sliding block 9. The fixed block 8 is provided with a first groove, the first groove is positioned above the second groove, the first groove is communicated with the second groove, and the screw seat 11 is arranged in the first groove and is fixed with the fixed block 8 through the second fixing screw 14. Because the first groove is communicated with the second groove, the structures such as the sliding block 9, the screw 13 and the screw seat 11 can be assembled firstly and then respectively put into the first groove and the second groove, and then are fixed by the second fixing screw 14.

The two screws 13 are coaxially fixed (the fixing mode can be welding or fixing through a pin) and provided with chain wheels 12, and a chain is connected between the two chain wheels 12 as shown in fig. 3. The screw 13 is fixedly connected (e.g., welded, snapped or glued, etc.) at its end with a rotatable cap 10.

The embodiment also discloses a flexographic printing machine comprising the ink scraping device, namely the flexographic printing machine with the ink scraping device.

The specific implementation process is as follows: in this embodiment, the doctor blade 4 is opposed to the inking roller 3, and the inking roller 3 is driven by an external motor, and the inking roller 3 dips the ink in the ink cartridge 2. During rotation of the inking roller 3, the doctor blade 4 scrapes off excess ink on the inking roller 3.

When the thickness of the ink scraping needs to be adjusted, one of the rotating caps 10 is rotated, the corresponding screw 13 is driven to rotate by the rotating cap 10, the sprocket 12 is driven to rotate by the screw 13, the other sprocket 12 is driven to rotate by the sprocket 12 through a chain, and the other screw 13 is driven to rotate, so that synchronous rotation of the two screws 13 is realized.

Because screw rod 13 and sliding block 9 threaded connection, screw rod 13 and sliding block 9 constitute the screw rod pair, therefore when screw rod 13 rotates, two screw rods 13 drive corresponding sliding block 9 along screw rod 13 axial displacement, and two sliding blocks 9 drive scraper 4 together and remove, have realized the regulation of clearance between scraper 4 and the inking roller 3, can adjust the thickness of striking off of ink. Because the two screws 13 synchronously rotate, the sliding blocks 9 on the two sides of the supporting seat 6 synchronously move, so that the two ends of the scraper 4 synchronously move, the problem of uneven ink scraping caused by asynchronous movement of the two ends of the scraper 4 can be avoided, the thickness adjustment of the ink on different parts of the inking roller 3 is uniform, the two ends of the scraper 4 are not required to be debugged for a plurality of times, the operation is simple and convenient, and the printing quality is ensured.

Example 2

This embodiment is modified from embodiment 1, as shown in connection with fig. 4. The ink scraping device further comprises a tensioning wheel 18, a fixing plate 15 is welded between the two fixing blocks 8 or fixed through bolts, a sliding groove 19 is formed in the fixing plate 15, a tensioning adjusting block 16 is arranged in the sliding groove 19 in a sliding mode, an adjusting bolt 17 is connected to the fixing plate 15 through bearings in a rotating mode, and a smooth section of the adjusting bolt 17 is fixedly connected with the inner wall of the bearings (such as clamping or welding). The threaded section of the adjusting screw 17 is screwed with the tensioning adjusting block 16. Thus, by rotating the adjusting bolt 17, the tensioning adjusting block 16 is moved in the slide groove 19. The tensioning wheel 18 is rotatably connected to the tensioning adjustment block 16 in the following specific rotation manner: a vertical shaft is welded to the tensioning adjustment block 16, and the tensioning wheel 18 is rotated on the shaft by a bearing. The tensioner 18 is connected to the chain.

The tensioning wheel 18 thus tensions the chain so that it can be conveyed normally.

By rotating the adjusting bolt 17, the tensioning adjusting block 16 is driven to move, and the tensioning adjusting block 16 drives the tensioning wheel 18 to move, so that the tensioning degree of the tensioning wheel 18 is adjusted. By moving the tensioning adjustment block 16 in fig. 4 upwards, the tensioning degree of the tensioning wheel 18 becomes loose, so that the chain can be taken down, at this time, the two screws 13 can be in linkage cancellation, and the two ends of the scraper 4 can be respectively moved and adjusted by rotating the two screws 13 respectively, so that the inclination degree of the scraper 4 is corrected, and the scraper 4 is leveled. After the correction, the chain is mounted on the sprocket 12 and the tensioner 18, and the tensioner 18 continues to tension the chain by moving the tension adjusting block 16 downward, so that the two screws 13 can be synchronized.

The foregoing is merely exemplary of the present utility model, and specific technical solutions and/or features that are well known in the art have not been described in detail herein. It should be noted that, for those skilled in the art, several variations and modifications can be made without departing from the technical solution of the present utility model, and these should also be regarded as the protection scope of the present utility model, which does not affect the effect of the implementation of the present utility model and the practical applicability of the patent. The protection scope of the present application shall be subject to the content of the claims, and the description of the specific embodiments and the like in the specification can be used for explaining the content of the claims.

Claims (10)

1. The ink scraping device comprises two opposite supporting plates, sliding blocks are connected to opposite side surfaces of the two supporting plates in a sliding mode, a supporting seat is fixedly connected between the two sliding blocks, and a scraper is installed on the supporting seat and is characterized in that: screw units are all installed in two backup pads, screw units all include screw rod and screw rod seat, and screw rod seat and screw rod rotate to be connected, screw rod and sliding block threaded connection all are fixed on two screws and are equipped with the sprocket, are connected with the chain between two sprockets.

2. The ink scraping apparatus as claimed in claim 1, wherein: the end part of the screw rod is fixedly connected with a rotating cap.

3. The ink scraping apparatus as claimed in claim 1, wherein: the support plate is provided with a fixed block, and the fixed block is provided with a first groove; the screw rod seat is fixedly connected in the first groove.

4. A wiping device as defined in claim 3, wherein: the screw rod seat is fixedly arranged in the first groove through a screw or a bolt.

5. A wiping device as defined in claim 3, wherein: the fixed block is provided with a second groove, and the sliding block is slidably positioned in the second groove.

6. The ink scraping apparatus as claimed in claim 5, wherein: the first groove is communicated with the second groove.

7. The ink scraping apparatus as claimed in claim 1, wherein: the supporting seat is fixedly connected with a pressing block, and the scraper is positioned between the pressing block and the supporting seat.

8. The ink scraping apparatus as claimed in claim 1, wherein: the chain tensioner further comprises a tensioning wheel, and the tensioning wheel is connected with the chain.

9. The ink scraping apparatus as claimed in claim 8, wherein: still include the fixed plate, sliding connection has the tensioning regulating block on the fixed plate, be connected with adjusting bolt between tensioning regulating block and the fixed plate, the take-up pulley rotates to be connected on the tensioning regulating block.

10. Flexographic printing machine, its characterized in that: a wiping device comprising any one of claims 1 to 9.