Printing ink mixing and filtering equipment for printing ink printing

Abstract

The invention discloses printing ink mixing and filtering equipment for printing ink printing, relates to the technical field of printing ink processing, and solves the problems that impurities in printing ink block filtering holes in a lifting base, so that the printing ink is slowly filtered in the lifting base, and the filtering efficiency of the printing ink is low. A stirring rod for mixing printing ink raw materials is mounted at the center in the mixing barrel, and the upper end of the stirring rod is positioned on the outer side of the mixing barrel and is fixedly mounted on a positive and negative rotation motor; by arranging the anti-blocking structure, the silica gel scraper is movably attached to the filter sieve, impurities blocking the filter sieve can be scraped away, ink is pushed to penetrate through the filter sieve, and therefore the filtering efficiency of the ink can be effectively improved; by installing the scraping assembly, ink attached to the inner wall of the mixing barrel can be scraped off, waste caused by the fact that a large amount of ink is attached to the mixing inner wall is avoided, the surface of a scraping ring is sprayed with a nano coating, and the ink can be prevented from being attached to the scraping ring.

Description

Technical Field

[0001] The present invention relates to the technical field of ink processing, and specifically provides an ink mixing and filtering device for ink printing. Background Art

[0002] Mixed ink is a new type of ink formed by mixing ordinary ink components with UV curing materials. It combines general ink and UV curing technology. One or more UV curing lamps are installed on the printing press, enabling the ink to be printed on a traditional sheet-fed printing press, allowing the UV varnish to be quickly printed on the mixed ink and cured, obtaining a uniform and high-gloss varnishing effect; after the ink is mixed, it also needs to be filtered to remove impurities in the ink and improve the quality of the ink.

[0003] The existing Chinese patent CN217855663U discloses an ink mixing and filtering device for ink printing and processing. During use, the mixing tube needs to be rotated, so that the stirring tube rotates to stir and mix the ink raw materials. After mixing, only need to turn off the mixing motor, take out the threaded tube from the threaded hole, then move the mounting cover upward, so that the lifting base moves upward, and use the filter holes opened on the surface and the inner bottom wall of the lifting base to filter the impurities and foreign matters in the ink raw materials, thus completing the mixing and filtering process. The operation is simple and time-saving, thereby improving the efficiency of producing ink.

[0004] However, during the use of the above device, when the ink is self-filtered inside the lifting base, the impurities in the ink will block the filter holes on the lifting base, resulting in slow filtering of the ink inside the lifting base and low filtering efficiency of the ink. Summary of the Invention

[0005] The purpose of the present invention is to provide an ink mixing and filtering device for ink printing that can prevent impurities in the ink from blocking the filter holes, so as to solve the problems raised in the above background art.

[0006] To achieve the above purpose, the present invention provides the following technical solutions: An ink mixing and filtering device for ink printing, comprising a mixing barrel. At the center inside the mixing barrel, a stirring rod for mixing ink raw materials is installed. The upper end of the stirring rod is fixedly installed outside the mixing barrel on a forward and reverse motor. The lower end of the mixing barrel is installed with a filtering barrel for filtering the ink. The upper end of the mixing barrel is fixedly installed with a controller for controlling the operation of the forward and reverse motor. Outside the controller and at the upper end of the mixing barrel, a feed hopper is installed, and the feed hopper is in communication with the mixing barrel. On the outside of the filtering barrel, two symmetrically distributed handles are fixedly installed. At the lower end of the filtering barrel, a discharge pipe communicating therewith is fixedly installed. An electromagnetic valve is fixedly installed on the outside of the material guiding pipe at the lower end of the mixing barrel. Inside the filtering barrel, a filter screen is fixedly installed; an anti-blocking structure for preventing impurities in the ink from blocking the pores of the filter screen is installed inside the filtering barrel and above the filter screen. A connecting component is installed between the stirring rod and the anti-blocking structure. An installation structure is arranged on the outside at the connection between the filtering barrel and the mixing barrel.

[0007] Preferably, the anti-blocking structure includes a transmission ring installed on the lower side of the mixing barrel. At the lower end of the transmission ring and on the outside of the transmission ring, a first positioning ring is fixedly installed. A first bearing is installed between the transmission ring and the first positioning ring, and the transmission ring is rotationally connected to the first positioning ring through the first bearing. The first bearing can reduce the friction between the transmission ring and the first positioning ring. On the inner wall of the transmission ring at its lower end, several groups of tooth blocks evenly distributed in a circumferential manner are arranged. On the outside of the transmission ring and below the first positioning ring, two symmetrically distributed fixed rods are fixedly installed. On the outside of the two fixed rods, a silica gel scraper is fixedly sleeved, and the silica gel scraper is in active contact with the inner wall of the filtering barrel and the upper end surface of the filter screen respectively. The filter screen is made of wire mesh.

[0008] Preferably, the connecting component includes a reciprocating screw rod rotatably connected to the mixing barrel. At the upper end of the reciprocating screw rod and on the outside of the mixing barrel, a mounting seat is fixedly sleeved. On the upper end of the mounting seat, a ratchet wheel is movably sleeved. At the center of the lower end of the ratchet wheel, a second positioning ring is fixedly embedded. The ratchet wheel facilitates the one-way rotation of the reciprocating screw rod. A second bearing is installed between the second positioning ring and the mounting seat, and the second positioning ring is rotationally connected to the mounting seat through the second bearing. A ratchet tooth is rotatably installed on the upper end of the mounting seat.

[0009] Preferably, a torsion spring is fixedly sleeved on the outer side of the ratchet positioning shaft, and one end of the torsion spring located on the outer side is fixedly connected to the mounting base. The torsion spring can drive the rapid rebound and reset. A main gear meshed with the ratchet is installed on the outer side of the ratchet, and the main gear is fixedly sleeved on the outer side of the stirring rod. The lower end of the reciprocating screw is fixedly sleeved with a sub-gear on the lower side of the mixing barrel, and the sub-gear is meshed with the transmission ring through the tooth block. The reciprocating screw is rotationally connected to the bottom wall of the mixing barrel through a sealing bearing.

[0010] Preferably, a scraping assembly is installed inside the mixing barrel. The scraping assembly includes a scraping ring movably embedded inside the mixing barrel and capable of moving up and down. When the scraping ring moves downward, it can scrape off the ink adhering to the inner wall of the mixing barrel, reducing ink waste. The outer wall of the scraping ring is movably attached to the inner wall of the mixing barrel, and a nano-coating is sprayed on the outer part of the scraping ring. The nano-coating can prevent ink from adhering to the scraping ring. Two symmetrically distributed extension seats are fixedly installed on the inner wall of the scraping ring.

[0011] Preferably, one of the extension seats is threadedly connected to the reciprocating screw, and a slide bar penetrates through the inside of the other extension seat. The connection between the other extension seat and the slide bar is a sliding connection. The upper and lower ends of the slide bar are respectively fixedly connected to the top wall and the bottom wall of the mixing barrel. The distance between the two extension seats is greater than the diameter of the stirring blades of the stirring rod. The diameter of the stirring blades is smaller than the distance between the two extension seats, which can prevent the extension seats from colliding with the stirring blades.

[0012] Preferably, the mounting structure includes a support ring fixedly sleeved on the outer side of the filter barrel, and the upper port of the support ring is flush with the upper port of the filter barrel. A number of convex blocks are fixedly installed on the outer side of the support ring and are evenly distributed in a circular pattern at equal intervals. A top bead capable of moving left and right is movably embedded at the end of the convex block. One end of the top bead facing the inside of the convex block is fixedly connected to a V-shaped elastic sheet, and the other end of the V-shaped elastic sheet is fixedly connected to the convex block. The V-shaped elastic sheet can drive the top bead to pop out from the inside of the convex block.

[0013] Preferably, an annular seat is fixedly sleeved on the outer side of the mixing barrel. A limit activity groove for the up and down movement and left and right rotation of the convex block is provided inside the annular seat, and the number of the limit activity grooves is equal to the number of the convex blocks. The convex block stuck in the limit activity groove can prevent the filter barrel from detaching from the mixing barrel. A circular through hole equal to the number of the top beads is provided on the outer side of the annular seat, and the circular through hole communicates with the limit activity groove. The top bead is movably clamped with the annular seat through the circular through hole.

[0014] Compared with the prior art, the beneficial effects of the present invention are: 1. The present invention is provided with an anti-blocking structure. The anti-blocking structure is connected to the forward and reverse motor through a connecting component. After the forward and reverse motor drives the stirring rod to rotate to stir and mix the ink raw materials inside the mixing barrel, the forward and reverse motor drives the stirring rod to rotate in the reverse direction. When the stirring rod rotates in the reverse direction, it can drive the silicone scraper in the anti-blocking structure to rotate through the connecting component. The silicone scraper is movably attached to the filter screen, and can scrape off the impurities blocking the filter screen and push the ink through the filter screen, thereby effectively improving the filtering efficiency of the ink.

[0015] 2. The present invention is provided with a scraping component. When the anti-blocking structure inside the filter barrel rotates and operates, the reciprocating screw rotates and drives the scraping ring to move up and down through the extension seat. During the process of the scraping ring moving downward, it can scrape off the ink attached to the inner wall of the mixing barrel, avoiding waste caused by a large amount of ink adhering to the inner wall of the mixer. Moreover, the surface of the scraping ring is sprayed with a nano-coating, which can prevent the ink from adhering to the scraping ring. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a schematic diagram of the overall structure of the present invention; Figure 2 is a schematic side-sectional view of the mixing barrel and the filter barrel of the present invention; Figure 3 is a schematic diagram of the connection state of the internal structures of the mixing barrel and the filter barrel of the present invention; Figure 4 is of the present invention Figure 3 an enlarged and split schematic diagram of part A in; Figure 5 is a schematic diagram of the overall anti-blocking structure of the present invention; Figure 6 is a schematic cross-sectional view of the installation structure of the present invention; Figure 7 is of the present invention Figure 6 a split schematic diagram of the installation structure in.

[0017] In the figure: 1, mixing barrel; 2, stirring rod; 3, forward and reverse motor; 4, filter barrel; 5, anti-blocking structure; 501, transmission ring; 502, first positioning ring; 503, first bearing; 504, tooth block; 505, fixed rod; 506, silicone scraper; 6, connecting component; 601, reciprocating screw; 602, mounting seat; 603, ratchet; 604, second positioning ring; 605, second bearing; 606, ratchet tooth; 607, coil spring; 608, main gear; 609, sub-gear; 7, scraping component; 701, scraping ring; 702, extension seat; 703, sliding rod; 8, installation structure; 801, support ring; 802, protruding block; 803, top bead; 804, V-shaped elastic piece; 805, annular seat; 806, limiting activity groove; 9, controller; 10, feed hopper; 11, handle; 12, discharge pipe; 13, solenoid valve; 14, filter screen. Detailed Implementation Modes

[0018] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention. Embodiment 1

[0019] Please refer to Figure 1 、 Figure 2 and Figure 3 . A kind of ink mixing and filtering equipment for ink printing shown in the figure includes a mixing barrel 1. A stirring rod 2 for mixing ink raw materials is installed at the center inside the mixing barrel 1. The upper end of the stirring rod 2 is fixed outside the mixing barrel 1 to a forward and reverse motor 3. A filtering barrel 4 for filtering ink is installed at the lower end of the mixing barrel 1. A controller 9 for controlling the operation of the forward and reverse motor 3 is fixedly installed at the upper end of the mixing barrel 1. A feed hopper 10 is installed outside the controller 9 at the upper end of the mixing barrel 1, and the feed hopper 10 is communicated with the mixing barrel 1. Two symmetrically distributed handles 11 are fixedly installed outside the filtering barrel 4. A discharge pipe 12 communicated with it is fixedly installed at the lower end of the filtering barrel 4. A solenoid valve 13 is fixedly installed outside the guide pipe at the lower end of the mixing barrel 1. A filter screen 14 is fixedly installed inside the filtering barrel 4; An anti-blocking structure 5 for preventing impurities in the ink from blocking the pores of the filter screen 14 is installed inside the filtering barrel 4 and is located above the filter screen 14. A connecting component 6 is installed between the stirring rod 2 and the anti-blocking structure 5. An installation structure 8 is arranged outside the connection part of the filtering barrel 4 and the mixing barrel 1.

[0020] Please refer to Figure 3 and Figure 5 . The anti-blocking structure 5 includes a transmission ring 501 installed on the lower side of the mixing barrel 1. The lower end of the transmission ring 501 is fixedly installed outside the transmission ring 501 to a first positioning ring 502. A first bearing 503 is installed between the transmission ring 501 and the first positioning ring 502, and the transmission ring 501 is rotationally connected to the first positioning ring 502 through the first bearing 503. A number of groups of tooth blocks 504 evenly distributed in a circumferential manner are arranged on the inner wall of the transmission ring 501 at its lower end. Two symmetrically distributed fixing rods 505 are fixedly installed outside the transmission ring 501 at the lower side of the first positioning ring 502. A silica gel scraping plate 506 is fixedly sleeved outside the two fixing rods 505, and the silica gel scraping plate 506 is respectively in movable contact with the inner wall of the filtering barrel 4 and the upper end surface of the filter screen 14.

[0021] Please refer to Figure 3 and Figure 4, the connecting component 6 includes a reciprocating screw 601 rotatably connected to the mixing barrel 1. At the upper end of the reciprocating screw 601 located outside the mixing barrel 1, a mounting seat 602 is fixedly sleeved. At the upper end of the mounting seat 602, a ratchet wheel 603 is movably sleeved. At the center of the lower end of the ratchet wheel 603, a second positioning ring 604 is fixedly embedded. Between the second positioning ring 604 and the mounting seat 602, a second bearing 605 is installed, and the second positioning ring 604 is rotatably connected to the mounting seat 602 through the second bearing 605. At the upper end of the mounting seat 602, a ratchet tooth 606 is rotatably installed.

[0022] Please refer to Figure 4 and Figure 5 , a coil spring 607 is fixedly sleeved on the outer side of the positioning shaft of the ratchet tooth 606, and one end of the coil spring 607 located on the outer side is fixedly connected to the mounting seat 602. A main gear 608 meshed with the ratchet wheel 603 is installed on the outer side of the ratchet wheel 603, and the main gear 608 is fixedly sleeved on the outer side of the stirring rod 2. At the lower side of the mixing barrel 1 at the lower end of the reciprocating screw 601, a sub-gear 609 is fixedly sleeved, and the sub-gear 609 is meshed with the transmission ring 501 through a tooth block 504. The reciprocating screw 601 is rotatably connected to the bottom wall of the mixing barrel 1 through a sealing bearing.

[0023] The working principle of preventing impurities in the ink from clogging the filter holes: During use, the user first pours the raw materials for ink processing into the mixing barrel 1 through the feed hopper 10 in proportion, and then controls the forward and reverse motor 3 to operate through the controller 9. The forward and reverse motor 3 drives the stirring rod 2 to rotate to stir and mix the raw materials inside the mixing barrel 1. At this time, under the action of the ratchet wheel 603 and the ratchet tooth 606 of the connecting component 6, the reciprocating screw 601 does not rotate with the stirring rod 2. After the ink raw materials are mixed, the solenoid valve 13 is controlled to open through the controller 9, and the ink enters the filter barrel 4 from the mixing barrel 1. Then, the controller 9 is used to control the forward and reverse motor 3 to drive the stirring rod 2 to rotate in the reverse direction. At this time, under the action of the main gear 608, the ratchet wheel 603 and the ratchet tooth 606, the reciprocating screw 601 can rotate with the stirring rod 2. The rotation of the reciprocating screw 601 drives the sub-gear 609 to rotate. Under the condition that the sub-gear 609 is meshed with the transmission ring 501 through the tooth block 504, the rotation of the sub-gear 609 drives the transmission ring 501 to rotate through the tooth block 504. The rotation of the transmission ring 501 drives the silica gel scraper 506 to rotate through the fixed rod 505. Since the silica gel scraper 506 is in active contact with the filter barrel 4 and the filter screen 14 respectively, the silica gel scraper 506 can scrape off the impurities clogging the mesh holes of the filter screen 14 during the rotation process. The impurities accumulate on both sides of the silica gel scraper 506, preventing the impurities in the ink from clogging the filter mesh holes of the filter screen 14. And during the rotation process of the silica gel scraper 506, it can also accelerate the ink passing through the filter screen 14, thereby effectively improving the filtering efficiency of the ink. Embodiment 2

[0024] Please refer toFigure 2 and Figure 3 In this embodiment, a scraping component 7 is installed inside the mixing barrel 1 for further illustration of Embodiment 1. The scraping component 7 includes a scraping ring 701 that is movably embedded inside the mixing barrel 1 and can move up and down. The outer wall of the scraping ring 701 is in movable contact with the inner wall of the mixing barrel 1, and a nano-coating is sprayed on the outer surface of the scraping ring 701. Two symmetrically distributed extension seats 702 are fixedly installed on the inner wall of the scraping ring 701.

[0025] Please refer to Figure 3 . One of the extension seats 702 is threadedly connected to the reciprocating screw 601. A slide bar 703 passes through the other extension seat 702, and the connection between the other extension seat 702 and the slide bar 703 is a sliding connection. The upper and lower ends of the slide bar 703 are fixedly connected to the top wall and the bottom wall of the mixing barrel 1 respectively. The distance between the two extension seats 702 is greater than the diameter of the stirring blades of the stirring rod 2.

[0026] In this embodiment, during the rotation of the reciprocating screw 601 to drive the anti-blocking structure 5 to rotate, since the connection between one of the extension seats 702 on the scraping ring 701 and the reciprocating screw 601 is a threaded connection, the scraping ring 701 can be driven to move up and down inside the mixing barrel 1 during the rotation of the reciprocating screw 601. During the downward movement of the scraping ring 701, the scraping ring 701 can scrape off the ink adhering to the inner wall of the mixing barrel 1, thus effectively reducing the waste of ink. In addition, a nano-coating is sprayed on the surface of the scraping ring 701, which can effectively prevent the ink from adhering to the scraping ring 701. Embodiment Three

[0027] Please refer to Figure 6 and Figure 7 . In this embodiment, for further illustration of other embodiments, the installation structure 8 includes a support ring 801 fixedly sleeved on the outside of the filter barrel 4, and the upper port of the support ring 801 is flush with the upper port of the filter barrel 4. A number of convex blocks 802 are fixedly installed on the outside of the support ring 801 at equal circumferential intervals. A top bead 803 that can move left and right is movably embedded at the end of the convex block 802. A V-shaped elastic piece 804 is fixedly connected to one end of the top bead 803 facing the inside of the convex block 802, and the other end of the V-shaped elastic piece 804 is fixedly connected to the convex block 802.

[0028] Please refer to Figure 7 . An annular seat 805 is fixedly sleeved on the outside of the mixing barrel 1. A limit activity groove 806 for the up and down movement and left and right rotation of the convex block 802 is provided inside the annular seat 805, and the number of the limit activity grooves 806 is equal to the number of the convex blocks 802. Circular through holes equal to the number of the top beads 803 are provided on the outside of the annular seat 805, and the circular through holes are communicated with the limit activity grooves 806. The top beads 803 are movably clamped with the annular seat 805 through the circular through holes.

[0029] In this embodiment: After the ink is filtered by the filtering barrel 4, the filtering barrel 4 is rotated through two handles 11 so that the top bead 803 disengages from the circular through-hole on the annular seat 805. Then, the protruding block 802 on the support ring 801 is rotated to the other end of the limit movable groove 806 through the handle 11. At this time, the protruding block 802 can be moved out of the annular seat 805, so that the filtering barrel 4 is separated from the mixing barrel 1, facilitating the flushing of the filter screen 14 and the anti-blocking structure 5 to remove the impurities filtered out inside the filtering barrel 4. When installing the filtering barrel 4, just operate in reverse according to the above steps.

[0030] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or device.

[0031] Although the embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An ink mixing and filtering device for ink printing, comprising a mixing barrel (1), wherein a stirring rod (2) for mixing ink raw materials is installed at the center inside the mixing barrel (1), and the upper end of the stirring rod (2) is fixedly installed on a forward and reverse motor (3) outside the mixing barrel (1), characterized in that: A filter barrel (4) for filtering the ink is installed at the lower end of the mixing barrel (1). A controller (9) for controlling the operation of the forward and reverse motor (3) is fixedly installed at the upper end of the mixing barrel (1). A feed hopper (10) is installed outside the controller (9) at the upper end of the mixing barrel (1), and the feed hopper (10) is communicated with the mixing barrel (1). Two symmetrically distributed handles (11) are fixedly installed on the outside of the filter barrel (4). A discharge pipe (12) communicated with it is fixedly installed at the lower end of the filter barrel (4). A solenoid valve (13) is fixedly installed on the outside of the guide pipe at the lower end of the mixing barrel (1). A filter screen (14) is fixedly installed inside the filter barrel (4). An anti-blocking structure (5) for preventing impurities in the ink from blocking the pores of the filter screen (14) is installed inside the filter barrel (4) and is located above the filter screen (14). A connection component (6) is installed between the stirring rod (2) and the anti-blocking structure (5). An installation structure (8) is arranged outside the connection between the filter barrel (4) and the mixing barrel (1).

2. The ink mixing and filtering device for ink printing according to claim 1, characterized in that: The anti-blocking structure (5) includes a transmission ring (501) installed on the lower side of the mixing barrel (1). A first positioning ring (502) is fixedly installed on the outside of the lower end of the transmission ring (501). A first bearing (503) is installed between the transmission ring (501) and the first positioning ring (502), and the transmission ring (501) is rotatably connected to the first positioning ring (502) through the first bearing (503). A number of groups of circumferentially equidistributed tooth blocks (504) are arranged on the inner wall of the transmission ring (501) at its lower end. Two symmetrically distributed fixing rods (505) are fixedly installed on the outside of the transmission ring (501) below the first positioning ring (502). A silica gel scraper (506) is fixedly sleeved on the outside of the two fixing rods (505), and the silica gel scraper (506) is movably attached to the inner wall of the filter barrel (4) and the upper end face of the filter screen (14) respectively.

3. An ink mixing and filtering device for ink printing according to claim 2, wherein: The connection component (6) includes a reciprocating screw rod (601) rotatably connected to the mixing barrel (1). An installation seat (602) is fixedly sleeved on the upper end of the reciprocating screw rod (601) outside the mixing barrel (1). A ratchet wheel (603) is movably sleeved on the upper end of the installation seat (602). A second positioning ring (604) is fixedly embedded at the center of the lower end of the ratchet wheel (603). A second bearing (605) is installed between the second positioning ring (604) and the installation seat (602), and the second positioning ring (604) is rotatably connected to the installation seat (602) through the second bearing (605). A ratchet tooth (606) is rotatably installed on the upper end of the installation seat (602).

4. An ink mixing and filtering device for ink printing according to claim 3, characterized in that: A torsion spring (607) is fixedly sleeved on the outer side of the ratchet positioning shaft (606), and one end of the torsion spring (607) located on the outer side is fixedly connected to the mounting base (602). A main gear (608) engaged with the ratchet wheel (603) is installed on the outer side of the ratchet wheel (603), and the main gear (608) is fixedly sleeved on the outer side of the stirring rod (2). A secondary gear (609) is fixedly sleeved on the lower end of the reciprocating screw (601) below the mixing barrel (1), and the secondary gear (609) is engaged with the transmission ring (501) through the tooth block (504). The reciprocating screw (601) is rotationally connected to the bottom wall of the mixing barrel (1) through a sealing bearing.

5. An ink mixing and filtering device for ink printing according to claim 4, characterized in that: A scraping assembly (7) is installed inside the mixing barrel (1). The scraping assembly (7) includes a scraping ring (701) movably embedded inside the mixing barrel (1) and capable of moving up and down. The outer wall of the scraping ring (701) is in movable contact with the inner wall of the mixing barrel (1), and a nano - coating is sprayed on the outer side of the scraping ring (701). Two symmetrically distributed extension seats (702) are fixedly installed on the inner wall of the scraping ring (701).

6. An ink mixing and filtering device for ink printing according to claim 5, characterized in that: One of the extension seats (702) is threadedly connected to the reciprocating screw (601). A slide bar (703) penetrates through the other extension seat (702), and the connection between the other extension seat (702) and the slide bar (703) is a sliding connection. The upper and lower ends of the slide bar (703) are respectively fixedly connected to the top wall and the bottom wall of the mixing barrel (1). The distance between the two extension seats (702) is greater than the diameter of the stirring blades of the stirring rod (2).

7. An ink mixing and filtering device for ink printing according to claim 1, characterized in that: The installation structure (8) includes a support ring (801) fixedly sleeved on the outer side of the filter barrel (4), and the upper port of the support ring (801) is flush with the upper port of the filter barrel (4). A number of convex blocks (802) evenly distributed in a circumferential manner are fixedly installed on the outer side of the support ring (801). A top bead (803) capable of moving left and right is movably embedded at the end of the convex block (802). A V - shaped elastic sheet (804) is fixedly connected to one end of the top bead (803) facing the inside of the convex block (802), and the other end of the V - shaped elastic sheet (804) is fixedly connected to the convex block (802).

8. An ink mixing and filtering device for ink printing according to claim 7, characterized in that: An annular seat (805) is fixedly sleeved on the outer side of the mixing barrel (1). A limit activity groove (806) for the up - and - down movement and left - and - right rotation of the convex block (802) is formed inside the annular seat (805), and the number of the limit activity grooves (806) is equal to the number of the convex blocks (802). A number of circular through - holes equal to the number of the top beads (803) are formed on the outer side of the annular seat (805), and the circular through - holes communicate with the limit activity grooves (806). The top bead (803) is movably clamped with the annular seat (805) through the circular through - hole.

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