A sand mill for ink

Abstract

The utility model discloses a sand mill for ink, comprising a machine base, a grinding cylinder fixed on the machine base, a rotating shaft rotatably arranged in the grinding cylinder, a plurality of grinding discs spaced in parallel and fixed on the rotating shaft, a rotating device driving the rotating shaft to rotate relative to the grinding cylinder, a filter cylinder with one end fixed to the inner end wall of the grinding cylinder and surrounding the rotating shaft and the grinding disc, a plurality of filter holes spaced in parallel and evenly arranged on the side wall of the filter cylinder, an annular partition plate fixedly sleeved on the filter cylinder and fixedly connected to the inner wall of the grinding cylinder with an outer ring, a pair of retaining rings spaced in parallel and slidably sleeved on the filter cylinder, a plurality of connecting rods evenly surrounding the filter cylinder and fixedly connected to the two retaining rings at both ends, a sliding device driving the retaining ring to slide relative to the filter cylinder, and a feed pipe and a discharge pipe fixedly arranged on the outer wall of the grinding cylinder and communicating with the inside of the grinding cylinder. The utility model has the following advantages and effects: it can filter and screen ink raw materials of different coarseness and fineness, and the filter holes are not easy to be blocked.

Description

Technical Field

[0001] The utility model relates to the technical field of ink production equipment, in particular to a sand mill used for ink. Background Art

[0002] In the process of ink production, an ink sand mill is required to evenly grind the liquid raw materials to achieve a certain fineness. In the prior art, the ink raw materials are fed into the grinding cylinder of the sand mill through a feed pump. The high-speed rotating main shaft and grinding disc in the grinding cylinder stir the grinding medium, causing the grinding medium to collide with the ink raw materials, thereby grinding the ink. Finally, the finely ground ink raw materials will pass through the cylindrical filter structure and be discharged from the discharge port of the grinding cylinder. However, there are two problems with the above-mentioned ink grinder in actual work. First, the inner diameter of the filter holes in the filter structure is fixed, and it is impossible to screen ink raw materials of different coarsenesses; second, the filter holes of the filter structure are very easy to clog, and it is often necessary to manually disassemble the sand mill regularly to clean the filter structure. Utility Model Content

[0003] The utility model aims to provide a sand mill for ink, which has the effect of being able to filter and screen ink raw materials of different coarseness and fineness, and the filter holes are not easily blocked.

[0004] The above technical objectives of the utility model are achieved through the following technical solutions: a sand mill for ink, comprising a machine base, a grinding cylinder fixed on the machine base, a rotating shaft rotatably arranged in the grinding cylinder, a plurality of grinding discs spaced in parallel and fixed on the rotating shaft, a rotating device for driving the rotating shaft to rotate relative to the grinding cylinder, a filter cylinder with one end fixed to the inner end wall of the grinding cylinder and surrounding the rotating shaft and the grinding disc, a plurality of filter holes spaced in parallel and evenly arranged on the side wall of the filter cylinder, an annular partition fixedly sleeved on the filter cylinder and with the outer ring fixedly connected to the inner wall of the grinding cylinder, A pair of parallel and spaced retaining rings slidably sleeved on the filter cartridge, a plurality of connecting rods uniformly surrounding the filter cartridge and fixedly connected to the two retaining rings at both ends, a sliding device for driving the retaining rings to slide relative to the filter cartridge, a feed pipe and a discharge pipe fixedly arranged on the outer wall of the grinding cartridge and connected to the inside of the grinding cartridge, the two retaining rings jointly cover a plurality of groups of filter holes on the side wall of the filter cartridge, and a group of filter holes is left in the gap between the two retaining rings, the inner diameters of each group of filter holes decrease successively and are located in the middle of the filter cartridge, the feed pipe and the discharge pipe are respectively located on both sides of the annular partition, and the discharge pipe is located below the filter cartridge.

[0005] The utility model is further configured as follows: the grinding cylinder comprises a left cylinder body and a right cylinder body, the left cylinder body and the right cylinder body are fixedly connected by bolts and nuts, the filter cylinder, annular partition, retaining ring and discharge pipe are all arranged in the left cylinder body, the feed pipe is arranged at the end of the right cylinder body, and a pair of support columns that support and connect the bottom of the right cylinder body are vertically fixed on the machine base.

[0006] The utility model is further configured as follows: the rotating device includes a motor, a first pulley, a second pulley, and a belt sleeved on the first pulley and the second pulley, the motor is fixedly mounted on the machine base, the first pulley is fixedly mounted on the output end of the motor, one end of the rotating shaft rotates to pass through the end of the right cylinder body and is fixedly connected to the second pulley.

[0007] The utility model is further configured as follows: the base is located at the end of the right cylinder body and a chassis is fixedly installed thereon; the pulley one, pulley two and belt are all located in the chassis; the motor is fixedly installed on the side wall of the chassis; the output end rotates to pass through the interior of the chassis to connect to the pulley one; one end of the rotating shaft rotates to pass through the interior of the chassis to connect to the pulley two.

[0008] The utility model is further configured as follows: a connecting cylinder is fixedly provided on the side wall of the chassis, and the connecting cylinder is fixedly connected to the right cylinder end by screws, part of the rotating shaft is located in the connecting cylinder, and a circle of positioning protrusions is fixedly provided, and the two ends of the positioning protrusions respectively rotate to contact the right cylinder end and the side wall of the chassis.

[0009] The utility model is further configured as follows: an annular supporting protrusion is fixedly provided on the inner end of the left cylinder body, and one end of the rotating shaft is rotatably inserted into the inner circle of the supporting protrusion.

[0010] The utility model is further configured as follows: the sliding device includes a slide plate 1 sliding on the top of the left cylinder body, a screw rod rotating on the top of the left cylinder body and sliding through the slide plate 1, a nut fixed on the slide plate 1 and threadedly connected to the screw rod, a handle fixed to one end of the screw rod, a slide plate 2 fixed to the top of the retaining ring and parallel to the slide plate 1, a pair of long grooves 1 respectively opened on both sides of the slide plate 1 and having an inclined angle, a pair of long grooves 2 respectively opened on both sides of the slide plate 2 and parallel to the long groove 1, a pair of lifting rods vertically located on both sides of the slide plate 1 and slidably interspersed with the side wall of the left cylinder body, and a pair of rollers rotatably arranged on the lifting rods and rolling in the long grooves 1 and 2 respectively.

[0011] The utility model is further configured as follows: a long slide groove for sliding a slide plate is provided on the top of the left cylinder body, and markings corresponding to each group of filter holes are provided on both sides of the long slide groove of the left cylinder body, and a pointer matching the markings is fixedly provided on the slide plate.

[0012] The utility model is further configured as follows: the diameters of all grinding discs on the rotating shaft increase in sequence from the left cylinder body to the right cylinder body.

[0013] The utility model is further configured as follows: a cooling chamber is opened in the side wall of the right cylinder body, and a water inlet pipe and a water outlet pipe connected to the cooling chamber are fixedly arranged on the outer side wall of the right cylinder body, and the water inlet pipe and the water outlet pipe are respectively located on the upper and lower sides of the rotating shaft, and are respectively close to the two ends of the right cylinder body.

[0014] The beneficial effect of the utility model is that by adopting the above technical scheme, when it is necessary to screen graphite of different coarseness and fineness, the handle is first manually rotated to make the handle drive the screw to rotate, and then the nut threadedly connected to the screw will drive the slide plate 1 to slide relative to the long groove on the top of the left cylinder body under the rotation of the screw. Because the lifting rod slidingly interspersed with the left cylinder side wall rotates, the roller arranged on the long groove 1 on one side of the slide plate 1 is rotated, and the long groove has a certain inclination angle. Therefore, under the sliding of the slide plate 1, the roller on the lifting rod will roll along the long groove 1, and at the same time drive the lifting rod to slide up and down relative to the left cylinder body. Because the part of the lifting rod extending into the left cylinder body is rotatably provided with a roller rolling on the long groove 2 on one side of the slide plate 2, and the long groove 2 and the long groove 1 are parallel to each other, so under the up and down sliding of the lifting rod, the roller will slide along the long groove 2, and at the same time drive the slide plate 2 and the retaining ring to slide relative to the filter cylinder. Then, the gap between the two retaining rings will move and switch between different groups of filter holes during the sliding process of the retaining ring relative to the filter cylinder, and stop until it moves to a group of filter holes with a suitable inner diameter. Then, the ink raw material is added through the feed port at the end of the right cylinder body, and the motor is turned on, so that the motor drives the main shaft and the grinding disc to rotate at high speed to grind the ink raw material for a certain period of time through the belt transmission structure of pulley 1, pulley 2 and belt. Finally, the ink raw material ground to the required coarseness will pass through the filter holes in the gap between the two retaining rings, gather in the temporary transition space composed of the filter cylinder, the annular partition and the left cylinder wall, and flow out from the discharge port at the bottom of the left cylinder body.

[0015] If the above-mentioned filter holes are blocked and the sand mill is not working, the above-mentioned steps can be used to adjust the gap between the two retaining rings to a group of filter hole positions with the largest inner diameter, and then clean water or cleaning liquid can be continuously injected into the sand mill to quickly flush out the ink raw materials blocked in the filter holes; if the above-mentioned filter holes are seriously blocked and the sand mill is still working, the above-mentioned steps can be used to temporarily adjust the gap between the two retaining rings to a group of filter hole positions with similar inner diameters to ensure smooth discharge of the ink raw materials. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0017] Figure 1 Schematic diagram of the three-dimensional structure of this embodiment;

[0018] Figure 2 is a structural cross-sectional view of this embodiment;

[0019] Figure 3 Schematic diagram of the connection relationship between the slide plate 1, the slide plate 2, the lifting rod and the retaining ring of the present embodiment;

[0020] Figure 4 yes Figure 1 A magnified image of point A;

[0021] In the figure, 1, machine base; 11, support column; 2, grinding cylinder; 21, left cylinder; 211, discharge pipe; 212, support protrusion; 213, long slide; 214, mark; 22, right cylinder; 221, feed pipe; 222, cooling chamber; 223, water inlet pipe; 224, water outlet pipe; 3, rotating shaft; 31, positioning protrusion; 4, grinding disc; 5, rotating device; 51, motor; 52, belt Wheel one; 53, pulley two; 54, belt; 6, filter cartridge; 61, filter hole; 62, annular partition; 7, retaining ring; 71, connecting rod; 8, sliding device; 81, slide plate one; 811, pointer; 82, screw; 83, nut; 84, handle; 85, slide plate two; 86, long groove one; 87, long groove two; 88, lifting rod; 89, roller; 9, chassis; 91, connecting cylinder. DETAILED DESCRIPTION

[0022] The technical solution of the utility model will be described clearly and completely below in conjunction with specific embodiments. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of them. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] Embodiment: A sand mill for ink, such as Figure 1-4As shown, it includes a machine base 1, a grinding cylinder 2 fixed on the machine base 1, a rotating shaft 3 rotatably arranged in the grinding cylinder 2, a plurality of grinding discs 4 spaced in parallel and fixed on the rotating shaft 3, a rotating device 5 for driving the rotating shaft 3 to rotate relative to the grinding cylinder 2, a filter cylinder 6 having one end fixed to the inner end wall of the grinding cylinder 2 and surrounding the rotating shaft 3 and the grinding disc 4, a plurality of groups of filter holes 61 spaced in parallel and evenly arranged on the side wall of the filter cylinder 6, an annular partition plate 62 fixedly sleeved on the filter cylinder 6 and having an outer ring fixedly connected to the inner wall of the grinding cylinder 2, a pair of retaining rings 7 spaced in parallel and slidably sleeved on the filter cylinder 6, and a plurality of uniform filter holes 61. A connecting rod 71 evenly surrounds the filter barrel 6 and is fixedly connected to two retaining rings 7 at both ends, a sliding device 8 drives the retaining ring 7 to slide relative to the filter barrel 6, a feed pipe 221 and a discharge pipe 211 are fixedly arranged on the outer wall of the grinding barrel 2 and connected to the inside of the grinding barrel 2, the two retaining rings 7 together cover the multiple groups of filter holes 61 on the side wall of the filter barrel 6, and a group of filter holes 61 is left in the gap between the two retaining rings 7, the inner diameter of each group of filter holes 61 decreases successively and is located in the middle of the filter barrel 6, the feed pipe 221 and the discharge pipe 211 are respectively located on both sides of the annular partition 62, and the discharge pipe 211 is located below the filter barrel 6.

[0024] Furthermore, the grinding cylinder 2 includes a left cylinder body 21 and a right cylinder body 22, which are fixedly connected by bolts, the filter cylinder 6, the annular partition plate 62, the retaining ring 7 and the discharge pipe 211 are all arranged in the left cylinder body 21, the feed pipe 221 is arranged at the end of the right cylinder body 22, and a pair of support columns 11 supporting and connecting the bottom of the right cylinder body 22 are vertically fixedly arranged on the machine base 1. By adopting the above-mentioned grinding cylinder 2 structure, it is convenient for the staff to quickly disassemble and repair the sand mill.

[0025] Furthermore, the rotating device 5 includes a motor 51, a pulley 1 52, a pulley 2 53, and a belt 54 mounted on the pulley 1 52 and the pulley 2 53. The motor 51 is fixedly mounted on the machine base 1, the pulley 1 52 is fixedly mounted on the output end of the motor 51, and one end of the rotating shaft 3 rotates to pass through the end of the right cylinder body 22 and is fixedly connected to the pulley 2 53.

[0026] Furthermore, the machine base 1 is fixedly provided with a case 9 at the end of the right cylinder 22, and the pulley 1 52, the pulley 2 53 and the belt 54 are all located in the case 9, and the motor 51 is fixedly installed on the side wall of the case 9, and the output end rotates through the inside of the case 9 to connect with the pulley 1 52, and one end of the rotating shaft 3 rotates through the inside of the case 9 to connect with the pulley 2 53. By adopting the above structure, the transmission safety and stability of the pulley 1 52, the pulley 2 53 and the belt 54 can be guaranteed, and the staff can be prevented from accidentally touching the high-speed rotating pulley 1 52 and other parts and getting injured, thereby improving the safety of the sand mill.

[0027] Furthermore, a connecting cylinder 91 is fixedly provided on the side wall of the chassis 9, and the connecting cylinder 91 is fixedly connected to the end of the right cylinder 22 by screws, a part of the rotating shaft 3 is located in the connecting cylinder 91, and a circle of positioning protrusions 31 is fixedly provided, and the two ends of the positioning protrusions 31 are respectively rotated to contact the end of the right cylinder 22 and the side wall of the chassis 9, and an annular supporting protrusion 212 is fixedly provided on the inner end of the left cylinder 21, and one end of the rotating shaft 3 is rotated and inserted into the inner circle of the supporting protrusion 212. By adopting the positioning and positioning of the connecting cylinder 91, the positioning protrusion 31 and the supporting protrusion 212, the rotating position of the rotating shaft 3 can be stably positioned to ensure the stable and safe grinding of the rotating shaft 3 and the grinding disc 4.

[0028] Furthermore, the sliding device 8 includes a slide plate 81 sliding on the top of the left cylinder body 21, a screw rod 82 rotating on the top of the left cylinder body 21 and sliding through the slide plate 81, a nut 83 fixed on the slide plate 81 and threadedly connected to the screw rod 82, a handle 84 fixed to one end of the screw rod 82, a slide plate 85 fixed on the top of the retaining ring 7 and parallel to the slide plate 81, a pair of long grooves 86 respectively opened on both sides of the slide plate 81 and having an inclined angle, a pair of long grooves 87 respectively opened on both sides of the slide plate 85 and parallel to the long groove 86, a pair of lifting rods 88 vertically located on both sides of the slide plate 81 and slidably interlaced with the side wall of the left cylinder body 21, and a pair of rollers 89 rotatably arranged on the lifting rods 88 and rolling in the long grooves 86 and 87 respectively.

[0029] Furthermore, a long slide groove 213 is provided at the top of the left cylinder 21 for the slide plate 81 to slide, and marks 214 corresponding to each group of filter holes 61 are provided on both sides of the long slide groove 213 of the left cylinder 21, and a pointer 811 matching the mark 214 is fixedly provided on the slide plate 81. By using the above marks 214 and pointer 811, it can help the staff to determine which group of filter holes 61 the gap between the two retaining rings 7 is located, so as to more accurately control the rotation of the handle 84.

[0030] Furthermore, the diameters of all grinding discs 4 on the rotating shaft 3 increase from the left cylinder 21 to the right cylinder 22. By adopting the above-mentioned grinding disc 4 structure, the grinding space of the right cylinder 22 and the filter cartridge 6 can be fully utilized, and the grinding effect of the grinding disc 4 can be further improved.

[0031] Furthermore, a cooling chamber 222 is provided in the side wall of the right cylinder 22, and a water inlet pipe 223 and a water outlet pipe 224 connected to the cooling chamber 222 are fixedly provided on the outer side wall of the right cylinder 22, and the water inlet pipe 223 and the water outlet pipe 224 are respectively located on the upper and lower sides of the rotating shaft 3, and are respectively close to the two ends of the right cylinder 22. By adopting the cooling chamber 222 in the side wall of the right cylinder 22, and the water inlet pipe 223 and the water outlet pipe 224, the ink raw material inside the right cylinder 22 can be cooled to ensure the quality of the ink.

[0032] The working principle of this embodiment:

[0033] When it is necessary to screen graphite of different coarseness and fineness, first manually rotate the handle 84 to make the handle 84 drive the screw 82 to rotate, and then the nut 83 threadedly connected to the screw 82 will drive the slide plate 81 to slide relative to the long groove 213 on the top of the left cylinder 21 under the rotation of the screw 82. Since the lifting rod 88 slidingly interspersed with the side wall of the left cylinder 21 rotates the roller 89 set on the long groove 86 on one side of the slide plate 81, and the long groove has a certain inclination angle, under the sliding of the slide plate 81, The roller 89 on the lifting rod 88 will roll along the long groove 1 86, and at the same time drive the lifting rod 88 to slide up and down relative to the left cylinder 21. Because the lifting rod 88 extends into the left cylinder 21, the roller 89 that is provided with the long groove 2 87 that rolls on one side of the slide plate 2 85 is rotated, and the long groove 2 87 and the long groove 1 86 are parallel to each other. Therefore, when the lifting rod 88 slides up and down, the roller 89 will slide along the long groove 2 87, and at the same time drive the slide plate 2 85 and the retaining ring 7 to slide relative to the filter cartridge 6. Then, the gap between the two retaining rings 7 will be moved and switched between different groups of filter holes 61 during the sliding process of the retaining ring 7 relative to the filter cartridge 6, and will stop until it moves to a group of filter holes 61 with a suitable inner diameter. Then, ink raw materials are added through the feed port at the end of the right cylinder 22, and the motor 51 is turned on, so that the motor 51 drives the main shaft and the grinding disc 4 to rotate at high speed to grind the ink raw materials for a certain period of time through the belt 54 transmission structure of the pulley 1 52, the pulley 2 53 and the belt 54. Finally, the ink raw materials ground to the required coarseness will pass through the filter holes 61 in the gap between the two retaining rings 7, and will be collected in the temporary transition space composed of the filter cylinder 6, the annular partition 62 and the wall of the left cylinder 21, and will flow out from the discharge port at the bottom of the left cylinder 21.

[0034] If the filter holes 61 are clogged and the sand mill is not working, the gap between the two retaining rings 7 can be adjusted to a group of filter holes 61 with the largest inner diameter through the above steps, and then clean water or cleaning liquid can be continuously injected into the sand mill to quickly flush out the ink raw materials clogged in the filter holes 61; if the filter holes 61 are seriously clogged and the sand mill is working, the gap between the two retaining rings 7 can be temporarily adjusted to a group of filter holes 61 with similar inner diameters through the above steps to ensure smooth discharge of the ink raw materials.

Claims

1. A sand mill for ink, characterized in that: The invention comprises a machine base (1), a grinding cylinder (2) fixed on the machine base (1), a rotating shaft (3) rotatably arranged in the grinding cylinder (2), a plurality of grinding discs (4) spaced in parallel and fixed on the rotating shaft (3), a rotating device (5) for driving the rotating shaft (3) to rotate relative to the grinding cylinder (2), a filter cylinder (6) having one end fixed to the inner end wall of the grinding cylinder (2) and surrounding the rotating shaft (3) and the grinding discs (4), a plurality of groups of filter holes (61) spaced in parallel and evenly arranged on the side wall of the filter cylinder (6), an annular partition plate (62) fixedly sleeved on the filter cylinder (6) and having an outer ring fixedly connected to the inner wall of the grinding cylinder (2), a pair of retaining rings (7) spaced in parallel and slidably sleeved on the filter cylinder (6), and a plurality of filter holes (61) evenly arranged around the filter cylinder (6). The filter cartridge (6) comprises a connecting rod (71) with two retaining rings (7) fixedly connected at both ends thereof, a sliding device (8) for driving the retaining ring (7) to slide relative to the filter cartridge (6), a feed pipe (221) and a discharge pipe (211) fixedly arranged on the outer wall of the grinding cartridge (2) and connected to the inside of the grinding cartridge (2), the two retaining rings (7) jointly covering a plurality of groups of filter holes (61) on the side wall of the filter cartridge (6), and a group of filter holes (61) being left in the gap between the two retaining rings (7), the inner diameters of the groups of filter holes (61) decreasing successively and being located in the middle of the filter cartridge (6), the feed pipe (221) and the discharge pipe (211) being respectively located on both sides of the annular partition (62), and the discharge pipe (211) being located below the filter cartridge (6).

2. A sand mill for ink according to claim 1, characterized in that: The grinding cylinder (2) comprises a left cylinder body (21) and a right cylinder body (22), wherein the left cylinder body (21) and the right cylinder body (22) are fixedly connected by bolts, the filter cylinder (6), the annular partition plate (62), the retaining ring (7) and the discharge pipe (211) are all arranged in the left cylinder body (21), the feed pipe (221) is arranged at the end of the right cylinder body (22), and a pair of support columns (11) are vertically fixedly arranged on the machine base (1) to support and connect the bottom of the right cylinder body (22).

3. A sand mill for ink according to claim 2, characterized in that: The rotating device (5) comprises a motor (51), a first pulley (52), a second pulley (53), and a belt (54) sleeved on the first pulley (52) and the second pulley (53); the motor (51) is fixedly mounted on the machine base (1); the first pulley (52) is fixedly mounted on the output end of the motor (51); one end of the rotating shaft (3) rotates to pass through the end of the right cylinder body (22) and is fixedly connected to the second pulley (53).

4. A sand mill for ink according to claim 3, characterized in that: The base (1) is located at the end of the right cylinder body (22) and is fixedly provided with a case (9); the pulley 1 (52), the pulley 2 (53) and the belt (54) are all located in the case (9); the motor (51) is fixedly installed on the side wall of the case (9), and the output end rotates through the inside of the case (9) to connect with the pulley 1 (52); one end of the rotating shaft (3) rotates through the inside of the case (9) to connect with the pulley 2 (53).

5. A sand mill for ink according to claim 4, characterized in that: A connecting cylinder (91) is fixedly provided on the side wall of the chassis (9), and the connecting cylinder (91) is fixedly connected to the end of the right cylinder (22) by means of screws. Part of the rotating shaft (3) is located in the connecting cylinder (91), and a circle of positioning protrusions (31) is fixedly provided. The two ends of the positioning protrusions (31) are respectively rotatably contacted with the end of the right cylinder (22) and the side wall of the chassis (9).

6. A sand mill for ink according to claim 2, characterized in that: An annular supporting protrusion (212) is fixedly provided at the inner end of the left cylinder body (21), and one end of the rotating shaft (3) is rotatably inserted into the inner ring of the supporting protrusion (212).

7. A sand mill for ink according to claim 2, characterized in that: The sliding device (8) comprises a slide plate (81) sliding on the top of the left cylinder (21), a screw (82) rotating on the top of the left cylinder (21) and sliding through the slide plate (81), a nut (83) fixed on the slide plate (81) and threadedly connected to the screw (82), a handle (84) fixed on one end of the screw (82), a slide plate (85) fixed on the top of the retaining ring (7) and parallel to the slide plate (81), a pair of long grooves (86) respectively arranged on both sides of the slide plate (81) and having an inclined angle, a pair of long grooves (87) respectively arranged on both sides of the slide plate (85) and parallel to the long grooves (86), a pair of lifting rods (88) vertically located on both sides of the slide plate (81) and slidingly interlaced with the side wall of the left cylinder (21), and a pair of rollers (89) rotatably arranged on the lifting rods (88) and rolling in the long grooves (86) and the long grooves (87) respectively.

8. A sand mill for ink according to claim 7, characterized in that: The top of the left cylinder body (21) is provided with a long slide groove (213) for sliding the slide plate (81), and the left cylinder body (21) is provided with marks (214) corresponding to each group of filter holes (61) on both sides of the long slide groove (213), and the slide plate (81) is fixedly provided with a pointer (811) matching the mark (214).

9. A sand mill for ink according to claim 2, characterized in that: The diameters of all grinding discs (4) on the rotating shaft (3) increase sequentially from the left cylinder body (21) to the right cylinder body (22).

10. A sand mill for ink according to claim 2, characterized in that: A cooling chamber (222) is provided in the side wall of the right cylinder body (22), and a water inlet pipe (223) and a water outlet pipe (224) connected to the cooling chamber (222) are fixedly provided on the outer side wall of the right cylinder body (22), and the water inlet pipe (223) and the water outlet pipe (224) are respectively located on the upper and lower sides of the rotating shaft (3) and are respectively close to the two ends of the right cylinder body (22).

Images