Raw paper pulp coloring equipment for vulcanized fibers and method thereof

Abstract

The invention belongs to the technical field of papermaking, and particularly relates to raw paper pulp coloring equipment for vulcanized fiber and a method thereof.The coloring equipment comprises a rack, a dyeing tank, an extrusion roller and a coloring roller set, and the dyeing tank, the extrusion roller and the coloring roller set are arranged on the rack; the coloring roller set comprises a driving shaft in driving connection with the driving motor and a feeding roller arranged on the driving shaft in a sleeving mode, the feeding roller has the freedom degree of rotation in the feeding direction of raw paper pulp through the driving shaft, and discharging openings are formed in the surface of the feeding roller in an annular array mode with the axis as the center. Raw paper pulp passes through a gap between the feeding roller and the conveying belt, the discharging port is inserted into the raw paper pulp through rotation of the feeding roller and outputs dye, and the raw paper pulp is dyed from inside to outside through the coloring roller set. The discharge port of the coloring roller set is inserted into the middle layer of paper pulp, so that dye is directly fed into the paper pulp, and the paper pulp does not need to be soaked for a long time.

Description

Technical Field

[0001] The invention belongs to the technical field of papermaking, and in particular relates to a base paper pulp coloring device for vulcanized fiber and a method thereof. Background Art

[0002] At present, the base paper pulp is generally colored by soaking the base paper pulp in a dyeing tank, while the vulcanized fiber base paper also needs to go through a vulcanization step. Generally, the vulcanization step is performed by soaking the fiber in a vulcanizing liquid. The vulcanization step is usually performed before coloring to avoid the dye used for color adjustment from affecting the vulcanization effect of the pulp.

[0003] However, the pulp fibers become hard and swollen after vulcanization, which makes it difficult for external dyes to penetrate into the pulp and for the dyes to flow into the pulp. It takes several hours of soaking for the dyes to penetrate into the pulp. Insufficient soaking time will result in poor coloring effect inside the base paper, resulting in low production efficiency of colored base paper. Summary of the invention

[0004] In order to solve the problems existing in the above-mentioned prior art, the present invention provides a base paper pulp coloring device for vulcanized fiber and a method thereof, by adding a coloring roller group, and using the discharge port of the coloring roller group to insert the middle layer of the pulp, so as to directly deliver the dye into the pulp without soaking the pulp for a long time.

[0005] The specific technical solution adopted by the present invention is:

[0006] A base paper pulp coloring device for vulcanized fiber comprises a frame, a dyeing tank and a squeezing roller arranged on the frame, the base paper pulp is discharged along the output end of the dyeing tank and passes through the squeezing roller with the help of a conveyor belt, the coloring device is further provided with a coloring roller group, the coloring roller group is arranged on the discharge side of the squeezing roller, the coloring roller group comprises a driving shaft connected to a driving motor and a feeding roller sleeved on the driving shaft, the feeding roller has the freedom to rotate along the feeding direction of the base paper pulp with the help of the driving shaft, the surface of the feeding roller is provided with a discharge port in a ring array with the axis as the center, the base paper pulp passes along the gap between the feeding roller and the conveyor belt, the discharge port is inserted into the base paper pulp with the help of the rotation of the feeding roller and outputs the dye, and the base paper pulp is dyed from the inside out by the coloring roller group.

[0007] The discharge port of the feeding roller is in a needle-tube structure, and the dye inside the feeding roller penetrates into the base paper pulp along the needle tip of the feeding port.

[0008] The coloring roller group also includes a vibrating screen arranged on the frame, the vibrating screen is located at the discharge end of the coloring roller group, the discharge end of the coloring roller group is connected with the feed end of the dyeing tank by means of the vibrating screen, and the dye inside the base paper pulp is evenly diffused by the vibration formed by the vibrating screen.

[0009] The vibrating screen includes a support frame, a screen, a vibration motor, a swing rod and an eccentric rod. The screen is connected to the support frame by means of the swing rod. The output end of the vibration motor is eccentrically hinged with the swing rod by means of the eccentric rod. The swing rod swings back and forth with the help of the vibration motor and drives the screen to vibrate.

[0010] There are two groups of coloring roller groups, and a plurality of discharge ports are arranged on the surface of the feeding drum along the axial direction. The discharge ports of the two groups of coloring roller groups are arranged front and back in a cross pattern along the feeding direction of the base paper pulp.

[0011] The coloring roller group also includes a dye storage bin fixedly connected to the frame, the connecting side of the feed roller is connected to the driving motor, an opening is provided at the center of the open side of the feed roller, and the side wall between the edge of the feed roller and the opening prevents the dye in the feed roller from flowing out, and the feed pipe of the dye storage bin enters the cavity of the feed roller along the opening on the open side of the feed roller.

[0012] The input end of the discharge port is also provided with a quantitative component located inside the feeding roller, and the quantitative component includes an intercepting rod, a shifting rod and an elastic membrane, the intercepting rod is arranged along the driving shaft direction, the intercepting rod is fixedly connected to the frame and extends into the bottom of the cavity of the feeding roller along the opening of the feeding roller, the shifting rod is L-shaped structure, and the inflection point of the shifting rod is hinged to the inner wall of the feeding roller by means of a coil spring, the elastic membrane is arranged at the input end of the discharge port, and an extrusion chamber is formed between the elastic membrane and the output end of the discharge port, the end of the shifting rod is hooked and connected with the elastic membrane, the intercepting rod intercepts the shifting rod and drives the shifting rod to rotate, the elastic membrane is lifted or collapsed by means of the rotation of the shifting rod, and the extrusion chamber is lifted or collapsed by means of the elastic membrane to form expansion or compression, and the dye in the feeding roller penetrates into the extrusion chamber through the elastic membrane by means of the expansion and compression of the extrusion chamber and is discharged along the output end of the discharge port.

[0013] The output end of the discharge port is also provided with a one-way valve, and the dye has the freedom to flow out from the inside of the feeding roller by means of the one-way valve.

[0014] A method for coloring base paper pulp for vulcanized fiber, the coloring method specifically comprising the following steps:

[0015] S1. The vulcanized base paper pulp enters the dyeing tank and soaks for 15-30 minutes;

[0016] S2, the base paper pulp soaked with dye passes through the gap between the conveyor belt and the squeezing roller with the help of the conveyor belt, and the base paper pulp is squeezed out of water by the squeezing roller to form pre-filtered water;

[0017] S3, the base paper pulp after pre-filtration passes under the feeding roller, the discharge port of the feeding roller rotates with the feeding roller and is inserted into the middle layer of the base paper pulp, and the dye of the feeding roller is fed into the inside of the base paper pulp along the discharge port;

[0018] S4. The base paper pulp containing dyes passes through a vibrating screen. The dyes in the base paper pulp are evenly diffused and colored around by the vibration of the vibrating screen. The base paper pulp moves forward by the vibration of the vibrating screen and is discharged along the discharge end of the vibrating screen.

[0019] The beneficial effects of the present invention are:

[0020] 1. The present invention is additionally provided with a coloring roller group, and the discharge port of the coloring roller group is inserted into the middle layer of the pulp, so that the dye is directly delivered into the pulp, and the pulp does not need to be soaked for a long time. At the same time, when the discharge port is inserted into the middle layer of the pulp, the fibers on the surface of the pulp are pressed and interwoven with the fibers in the middle layer. Since the surface fibers absorb excess pigment during the soaking process, the surface fibers transfer the excess pigment to the middle layer fibers containing less dye, so that the dyes on the surface and the middle layers are evenly distributed, thereby improving the coloring effect.

[0021] 2. The present invention is further provided with a vibrating screen, and the dye inside the base paper pulp is evenly diffused by the vibration formed by the vibrating screen. Through the vibration of the vibrating screen, the dye in the dye-enriched area on the base paper pulp is rapidly diffused to the surroundings, so that the dye is evenly distributed, the dyeing time is shortened, and the coloring effect is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a structural schematic diagram of the present invention;

[0023] Figure 2 It is a schematic diagram of the top view structure of the present invention;

[0024] Figure 3 It is a front structural schematic diagram of the coloring roller group;

[0025] Figure 4 It is a structural schematic diagram of the quantitative component when the discharge port is closed;

[0026] Figure 5 It is a schematic diagram of the structure of the quantitative component when the discharge port is opened;

[0027] Figure 6 for Figure 4 A magnified schematic diagram of part A;

[0028] Figure 7 for Figure 5 A magnified schematic diagram of part B;

[0029] In the attached drawings, 1, frame, 2, dyeing tank, 3, extrusion roller, 4, conveyor belt, 5, drive motor, 6, drive shaft, 7, feed roller, 8, discharge port, 9, support frame, 10, screen, 11, vibration motor, 12, swing rod, 13, eccentric rod, 14, dye storage bin, 15, feed pipe, 16, intercepting rod, 17, lever, 18, elastic membrane, 19, coil spring, 20, one-way valve, 21, water collecting trough, 22, water diversion trough. DETAILED DESCRIPTION

[0030] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments:

[0031] Specific embodiments, such as Figure 1-7 As shown, the present invention provides a base paper pulp coloring device for vulcanized fiber, comprising a frame 1, a dyeing tank 2 and a squeeze roller 3 arranged on the frame 1, the base paper pulp is discharged along the output end of the dyeing tank 2 and passes through the squeeze roller 3 by means of a conveyor belt 4, the coloring device is further provided with a coloring roller group, the coloring roller group is arranged at the discharge side of the squeeze roller 3, the coloring roller group comprises a driving shaft 6 connected to a driving motor 5 and a feeding roller 7 sleeved on the driving shaft 6, the feeding roller 7 has the freedom to rotate along the feeding direction of the base paper pulp by means of the driving shaft 6, the surface of the feeding roller 7 is provided with a discharge port 8 in a ring array with the axis as the center, the base paper pulp passes along the gap between the feeding roller 7 and the conveyor belt 4, the discharge port 8 is inserted into the base paper pulp by means of the rotation of the feeding roller 7 and outputs the dye, and the base paper pulp is dyed from the inside out by the coloring roller group.

[0032] Because the pulp fibers become hard and swell after vulcanization, it is difficult for external dyes to penetrate into the pulp, and the dyes are difficult to flow in the pulp. It takes several hours of soaking for the dyes to penetrate into the pulp. Insufficient soaking time will make the coloring effect inside the base paper poor, resulting in low production efficiency of colored base paper.

[0033] Therefore, a coloring roller group is additionally provided in the present invention, such as Figure 4 As shown, the dotted part is the original paper pulp. The discharge port 8 of the coloring roller group is inserted into the middle layer of the pulp, so that the dye is directly sent into the pulp without soaking the pulp for a long time. At the same time, when the discharge port 8 is inserted into the middle layer of the pulp, the fibers on the surface of the pulp are pressed and interwoven with the fibers in the middle layer. Since the surface fibers absorb excess pigment during the soaking process, the surface fibers transfer the excess pigment to the middle layer fibers containing less dye, so that the dyes on the surface and middle layers are evenly distributed, thereby improving the coloring effect.

[0034] like Figure 1-7As shown, the discharge port 8 of the feed roller 7 is in a needle-tube structure, and the dye inside the feed roller 7 penetrates into the base paper pulp along the needle tip of the feed port. The needle-tube structure can penetrate into the middle layer of the pulp more easily, while reducing the damage to the morphology of the pulp surface.

[0035] like Figure 1-2 As shown, the coloring roller group also includes a vibrating screen arranged on the frame 1, and the vibrating screen is located at the discharge end of the coloring roller group. The discharge end of the coloring roller group is connected with the feed end of the dyeing tank 2 by means of the vibrating screen. The dye inside the base paper pulp is evenly diffused by the vibration formed by the vibrating screen. Through the vibration of the vibrating screen, the dye in the dye-enriched area on the base paper pulp is quickly diffused to the surroundings, so that the dye is evenly distributed, the dyeing time is shortened, and the coloring effect is improved.

[0036] like Figure 1-2 As shown, the vibrating screen includes a support frame 9, a screen 10, a vibration motor 11, a swing rod 12 and an eccentric rod 13. The screen 10 is connected to the support frame 9 by means of the swing rod 12. The output end of the vibration motor 11 is eccentrically hinged with the swing rod 12 by means of the eccentric rod 13. The swing rod 12 swings back and forth with the help of the vibration motor 11 and drives the screen 10 to vibrate.

[0037] like Figure 1-2 As shown, there are two groups of coloring roller groups, and a plurality of discharge ports 8 are arranged on the surface of the feeding roller 7 along the axial direction. The discharge ports 8 of the two groups of coloring roller groups are arranged front and back in a cross manner along the feeding direction of the base paper pulp. The two groups of interlaced coloring roller groups can inject dye into the base paper pulp more densely, and use a vibrating screen to even the color, thereby improving the coloring efficiency and quality. In addition, the rotation direction of the feeding roller 7 is the same as the feeding direction of the base paper pulp, so as to avoid the discharge port 8 from reversely shifting the base paper pulp and affecting the structure of the base paper pulp.

[0038] like Figure 1 and Figure 3 As shown, the coloring roller group also includes a dye storage bin 14 fixedly connected to the frame 1, the connecting side of the feed roller 7 is drive-connected to the drive motor 5, an opening is arranged at the center of the open side of the feed roller 7, and the side wall between the edge of the feed roller 7 and the opening hinders the dye in the feed roller 7 from flowing out, and the delivery pipe 15 of the dye storage bin 14 enters the cavity of the feed roller 7 along the opening of the open side of the feed roller 7. Since the transmission speed of the conveyor belt 4 is slow, the rotation speed of the feed roller 7 is also slow, and the feed roller 7 always rotates at a uniform speed, and the dye in the feed roller 7 will not produce large fluctuations, so that the dye inside the feed roller 7 will not spill out along the opening, the dye storage bin 14 always replenishes the feed roller 7, and the dye delivery rate is the same as the sum of the output rates of the dye at each discharge port 8 of the feed roller 7, thereby ensuring that there is always dye in the feed roller 7 for the discharge port 8 to discharge.

[0039] like Figure 1 and 3 -7, the input end of the discharge port 8 is also provided with a quantitative component located inside the feed roller 7, and the quantitative component includes an intercepting rod 16, a lever 17 and an elastic membrane 18. The intercepting rod 16 is arranged along the direction of the driving shaft 6, and the intercepting rod 16 is fixedly connected to the frame 1 and extends into the bottom of the cavity of the feed roller 7 along the opening of the feed roller 7. The lever 17 is L-shaped, and the inflection point of the lever 17 is hinged to the inner wall of the feed roller 7 by means of a coil spring 19. The elastic membrane 18 is arranged at the discharge port 8. At the input end, an extrusion chamber is formed between the elastic membrane 18 and the output end of the discharge port 8, the end of the lever 17 is hooked and connected to the elastic membrane 18, the intercepting rod 16 intercepts the lever 17 and drives the lever 17 to rotate, the elastic membrane 18 is lifted or collapsed with the help of the rotation of the lever 17, the extrusion chamber is lifted or collapsed with the help of the elastic membrane 18 to form expansion or compression, the dye in the feeding roller 7 penetrates into the extrusion chamber through the elastic membrane 18 with the help of the expansion and compression of the extrusion chamber and is discharged along the output end of the discharge port 8.

[0040] In order to prevent the discharge port 8 from splashing dye during the rolling of the feeding roller 7 and to ensure that only the discharge port 8 inserted into the pulp can discharge the material, a quantitative component is also provided in the present invention;

[0041] When the discharge port 8 is at a higher position, such as Figure 4 and Figure 6 As shown, when the discharge port 8 has not yet been inserted into the pulp, the lever 17 corresponding to the discharge port 8 has not yet passed the interception rod 16, so under the action of the coil spring 19, the hook end of the lever 17 presses the elastic film 18 and puts the extrusion chamber in a compressed state, and the pressure in the extrusion chamber is higher than the pressure in the feeding roller 7, preventing the dye from entering the extrusion chamber;

[0042] When the discharge port 8 is at a lower position, such as Figure 5 and Figure 7 As shown, when the discharge port 8 is inserted into the pulp, the lever 17 corresponding to the discharge port 8 is passing through the interception rod 16, and the lever 17 is intercepted by the interception rod 16. Since the lever 17 is hinged to the inner wall of the feeding roller 7, the lever 17 rotates and drives the hook end of the lever 17 to lift the elastic film 18. At this time, the volume of the extrusion chamber gradually expands, and the pressure in the extrusion chamber becomes lower, so that the pressure in the extrusion chamber is lower than the pressure in the feeding roller 7, and the dye enters the extrusion chamber;

[0043] When the discharge port 8 is at the lowest point and rises again, as the swing angle of the lever 17 increases, the lever 17 will gradually pass under the intercepting rod 16 and disengage, and the hook end of the lever 17 will press the elastic membrane 18 again and compress the extrusion chamber. The pressure in the extrusion chamber gradually increases, and since the elastic membrane 18 is a unidirectional membrane, the dye can only be discharged outward along the discharge port 8, and at the same time, the dye in the feeding roller 7 stops entering the extrusion chamber.

[0044] A one-way valve 20 is also provided at the output end of the discharge port 8, and the dye has the freedom to flow out from the inside of the feed roller 7 with the help of the one-way valve 20. A one-way valve is also provided on the elastic membrane 18. The one-way valve on the elastic membrane 18 and the one-way valve 20 can prevent the dye from flowing back, and at the same time ensure that during the expansion and contraction of the extrusion chamber, the dye can always be discharged in the direction of the feed roller 7 → extrusion chamber → the output end of the discharge port 8, and will not flow in the opposite direction.

[0045] In addition, Figure 1 As shown, a water collecting trough 21 is also provided under the frame 1 for collecting filtered water and dye, wherein a water inlet trough 22 is provided under the screen 10 of the vibrating screen, and the surface of the water inlet trough 22 is inclined along the discharging direction. Water is introduced into the water collecting trough 21 through the water inlet trough 22 to prevent water from dripping into the vibration motor 11 and causing a short circuit. The motor of the conveyor belt 4 is located on the side and this problem will not occur.

[0046] The present invention also provides a method for coloring vulcanized fiber base paper pulp, which specifically comprises the following steps:

[0047] S1, the base paper pulp after vulcanization enters the dyeing tank 2 and soaks for 15-30 minutes;

[0048] S2, the base paper pulp soaked with dye passes through the gap between the conveyor belt 4 and the squeezing roller 3 with the help of the conveyor belt 4, and the base paper pulp is squeezed out of water by the squeezing roller 3 to form pre-filtered water;

[0049] S3, the base paper pulp after pre-filtering passes under the feeding roller 7, the discharge port 8 of the feeding roller 7 rotates with the feeding roller 7 and is inserted into the middle layer of the base paper pulp, and the dye of the feeding roller 7 is fed into the inside of the base paper pulp along the discharge port 8;

[0050] S4. The base paper pulp containing dyes passes through a vibrating screen. The dyes in the base paper pulp are evenly diffused and colored around by the vibration of the vibrating screen. The base paper pulp moves forward by the vibration of the vibrating screen and is discharged along the discharge end of the vibrating screen.

[0051] In the present invention, after the base paper pulp is soaked, the squeezing roller 3 is often used for pre-squeezing. Since the dye contains a large amount of water, and the adhesion ability of the colored substance in the dye to the fiber is better than the adhesion ability of the water, the squeezing process mainly squeezes out the water. After the base paper pulp is drained, during the coloring process of the coloring roller group, it can better combine with the dye that penetrates into the middle layer of the coloring roller group, thereby improving the coloring effect and playing a role of pre-forming.

Claims

1. A device for coloring base paper pulp for vulcanized fiber, comprising a frame (1) and a dyeing tank (2) and a squeezing roller (3) arranged on the frame (1), wherein the base paper pulp is discharged from the output end of the dyeing tank (2) and passes through the squeezing roller (3) by means of a conveyor belt (4), characterized in that: The coloring device is further provided with a coloring roller group, which is arranged at the discharge side of the squeezing roller (3), and comprises a driving shaft (6) connected to a driving motor (5) and a feeding roller (7) sleeved on the driving shaft (6). The feeding roller (7) has the freedom to rotate along the feeding direction of the base paper pulp by means of the driving shaft (6). The surface of the feeding roller (7) is provided with a discharge port (8) in a ring array with the axis as the center. The base paper pulp passes along the gap between the feeding roller (7) and the conveyor belt (4). The discharge port (8) is inserted into the base paper pulp by means of the rotation of the feeding roller (7) and outputs the dye, and the base paper pulp is dyed from the inside out by means of the coloring roller group.

2. The apparatus for coloring base paper pulp for vulcanized fiber according to claim 1, characterized in that: The discharge port (8) of the feeding roller (7) is in the form of a needle tube, and the dye inside the feeding roller (7) penetrates into the base paper pulp along the needle tip of the feed port.

3. The apparatus for coloring base paper pulp for vulcanized fiber according to claim 1, characterized in that: The coloring roller group also includes a vibrating screen arranged on the frame (1), the vibrating screen being located at the discharge end of the coloring roller group, the discharge end of the coloring roller group being connected to the feed end of the dyeing tank (2) by means of the vibrating screen, and the dye inside the base paper pulp being evenly diffused by means of the vibration generated by the vibrating screen.

4. The apparatus for coloring base paper pulp for vulcanized fiber according to claim 3, characterized in that: The vibrating screen comprises a support frame (9), a screen (10), a vibration motor (11), a swing rod (12) and an eccentric rod (13); the screen (10) is connected to the support frame (9) by means of the swing rod (12); the output end of the vibration motor (11) is eccentrically hinged with the swing rod (12) by means of the eccentric rod (13); the swing rod (12) swings back and forth by means of the vibration motor (11) and drives the screen (10) to vibrate.

5. The apparatus for coloring base paper pulp for vulcanized fiber according to claim 1, characterized in that: Two groups of coloring roller groups are provided, and a plurality of groups of discharge ports (8) are provided on the surface of the feeding roller (7) along the axial direction. The discharge ports (8) of the two groups of coloring roller groups are arranged in a front-to-back cross pattern along the feeding direction of the base paper pulp.

6. The apparatus for coloring base paper pulp for vulcanized fiber according to claim 1, characterized in that: The coloring roller group also includes a dye storage bin (14) fixedly connected to the frame (1); the connection side of the feed roller (7) is connected to the drive motor (5); an opening is provided at the center of the open side of the feed roller (7); the side wall between the edge of the feed roller (7) and the opening prevents the dye in the feed roller (7) from flowing out; and the feed pipe of the dye storage bin (14) enters the cavity of the feed roller (7) along the opening on the open side of the feed roller (7).

7. The apparatus for coloring base paper pulp for vulcanized fiber according to claim 6, characterized in that: The input end of the discharge port (8) is also provided with a quantitative component located inside the feeding roller (7), the quantitative component comprising an intercepting rod (16), a lever (17) and an elastic membrane (18), the intercepting rod (16) being arranged along the direction of the driving shaft (6), the intercepting rod (16) being fixedly connected to the frame and extending into the bottom of the cavity of the feeding roller (7) along the opening of the feeding roller (7), the lever (17) being in an L-shaped structure, the inflection point of the lever (17) being hinged to the inner wall of the feeding roller (7) by means of a coil spring (19), and the elastic membrane (18) being arranged at the discharge port (8) At the input end, an extrusion chamber is formed between the elastic membrane (18) and the output end of the discharge port (8), the end of the lever (17) is hooked and connected to the elastic membrane (18), the intercepting rod (16) intercepts the lever (17) and drives the lever (17) to rotate, the elastic membrane (18) is lifted or collapsed by the rotation of the lever (17), the extrusion chamber is lifted or collapsed by the elastic membrane (18) to swell or compress, the dye in the feeding roller (7) penetrates through the elastic membrane (18) into the extrusion chamber by the swell and compression of the extrusion chamber and is discharged along the output end of the discharge port (8).

8. The apparatus for coloring base paper pulp for vulcanized fiber according to claim 1, characterized in that: The output end of the discharge port (8) is also provided with a one-way valve (20), and the dye has the freedom to flow out from the inside of the feeding roller (7) by means of the one-way valve (20).

9. A coloring method based on the base paper pulp coloring equipment for vulcanized fiber according to claim 1, characterized in that: The coloring method specifically comprises the following steps: S1, the vulcanized base paper pulp enters the dyeing tank (2) and soaks for 15-30 minutes; S2, the base paper pulp soaked in dye passes through the gap between the conveyor belt (4) and the squeezing roller (3) with the help of the conveyor belt (4), and the base paper pulp is squeezed out of water by the squeezing roller (3) to form pre-filtered water; S3, the base paper pulp that has been pre-filtered passes under the feeding roller (7), the discharge port (8) of the feeding roller (7) rotates with the feeding roller (7) and is inserted into the middle layer of the base paper pulp, and the dye of the feeding roller (7) is fed into the interior of the base paper pulp along the discharge port (8); S4. The base paper pulp containing dyes passes through a vibrating screen. The dyes in the base paper pulp are evenly diffused and colored around by the vibration of the vibrating screen. The base paper pulp moves forward by the vibration of the vibrating screen and is discharged along the discharge end of the vibrating screen.

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