A grinder for color masterbatch convenient for filtering and screening

Abstract

A grinder for masterbatch that is convenient for filtering and screening, the invention relates to the technical field of masterbatch production equipment; a feed hopper is provided on the top surface of a box body, and two grinding rollers are symmetrically provided inside the box body for rotation through bearings; a filtering and screening mechanism is provided inside the box body below the grinding rollers, and is matched with a discharge port opened on the right side wall of the box body; a screening drive mechanism is provided at the bottom of the filtering and screening mechanism; a secondary feeding mechanism is provided on one side of the box body, and is connected to a discharge port at the bottom of the box body through a guide pipe; a discharge pipe is fixedly provided at the bottom of the guide pipe, and both the guide pipe and the discharge pipe are equipped with control valves; the fine material screened out is repeatedly transported to the inside of the secondary feeding mechanism through the guide pipe, and then enters the inside of the box body for repeated grinding, without the need for manual re-feeding; the screening drive mechanism drives the screening frame to vibrate reciprocatingly up and down, assisting the screening frame in screening and filtering, thereby improving the screening efficiency.

Description

Technical Field

[0001] The invention relates to the technical field of color masterbatch production equipment, in particular to a grinder for color masterbatch which is convenient for filtering and screening. Background Art

[0002] After extrusion, some masterbatch is made into masterbatches. These masterbatches require grinding equipment to reduce them to the desired particle size. Existing grinders can only grind the masterbatches and then discharge them uniformly. If the particle size of the masterbatches after one grinding operation does not meet the required standard, manual re-grinding is required. This is a cumbersome operation and does not allow for screening of large particles that cannot be ground. Therefore, a masterbatch grinder that facilitates filtering and screening is urgently needed. Summary of the Invention

[0003] The purpose of the present invention is to provide a color masterbatch grinder with a simple structure, reasonable design and convenient filtering and screening to address the defects and shortcomings of the existing technology, which can solve the technical problems in the existing technology.

[0004] To achieve the above-mentioned purpose, the technical solution adopted by the present invention is as follows: it comprises a box, a feed hopper, a grinding roller, a No. 1 motor and a No. 1 gear; the feed hopper is provided on the top surface of the box; two grinding rollers are symmetrically arranged inside the box for rotation via bearings; the rear ends of the central axes of the two grinding rollers rotate through the rear side wall of the box via bearings and are fixedly connected to the No. 1 gear, and the two No. 1 gears are meshed with each other; the front end of the central axis of one of the grinding rollers rotates through the front side wall of the box via bearings and is fixedly connected to the output end of the No. 1 motor; the No. 1 motor is connected to an external power supply;

[0005] It also contains:

[0006] The filtering and screening mechanism is arranged inside the box below the grinding roller and is matched with the discharge port opened on the right side wall of the box. The discharge port is provided with a sealing door which is rotatable by a hinge;

[0007] A screening drive mechanism, wherein the screening drive mechanism is arranged at the bottom of the filtering and screening mechanism;

[0008] The secondary loading mechanism is arranged on one side of the box body and is connected to the discharge port at the bottom of the box body through a guide pipe; the bottom of the guide pipe is fixedly connected with a discharge pipe, and both the guide pipe and the discharge pipe are equipped with control valves.

[0009] As a further improvement of the present invention, a material guide block is fixedly provided inside the box body on the upper side of the two grinding rollers, and the top surface of the material guide block is arranged in an inwardly inclined shape.

[0010] Through the above technical solution design, the masterbatch raw materials can be easily introduced into the middle of the two grinding rollers through the setting of the guide block to avoid splashing everywhere.

[0011] As a further improvement of the present invention, a material guide trough is fixedly and obliquely provided on the right side wall of the box body below the discharge port.

[0012] Through the above technical solution design, the setting of the material guide trough is convenient for the output of the screened large-particle raw materials and is easy to collect.

[0013] As a further improvement of the present invention, the filtering and screening mechanism comprises:

[0014] A fixed frame, wherein the fixed frame is movably arranged in the middle of the inner side of the box body, and the surrounding walls of the fixed frame are arranged in contact with the inner side wall of the box body;

[0015] The screening frame is arranged on the upper side of the fixed frame, and one side of the screening frame is rotatably connected to the top surface of the fixed frame through the shaft seat and the rotating shaft; the right side and the upper side of the screening frame are both opened, and the surrounding walls of the screening frame are in contact with the inner wall of the box body;

[0016] Motor No. 2, the motor No. 2 is fixedly arranged on the top surface of the fixed frame through a motor bracket, and the output end of the motor No. 2 is fixedly connected to the rotating shaft in the shaft seat on one side of the screening frame; the motor No. 2 is connected to an external power supply.

[0017] Through the above technical solution design, the screening frame filters and screens the particles of the masterbatch that falls from the middle of the grinding roller. After screening for a period of time, the sealed door and the No. 2 motor are opened, and the output shaft of the No. 2 motor drives the screening frame to rotate around the right rotating shaft. The large particles of masterbatch retained in the screening frame are discharged through the discharge port. After the user collects them, they are transported from the feed hopper to the box for cyclic grinding.

[0018] As a further improvement of the present invention, the screening drive mechanism comprises:

[0019] A fixing bar, wherein the fixing bar is fixedly arranged on the inner side of the box body at the lower side of the fixing frame, a movable rod is movably provided in the middle of the fixing bar, the upper end of the movable rod is fixedly arranged on the bottom surface of the fixing frame; the lower end of the movable rod is fixedly connected to the gear box;

[0020] A compression spring, wherein the compression spring is sleeved on the movable rod between the fixing bar and the fixing frame, and the upper and lower ends of the compression spring are fixedly connected to the bottom of the fixing frame and the top surface of the fixing bar respectively;

[0021] A dual-axis motor, wherein the dual-axis motor is fixedly mounted inside the gear box via a motor bracket; the dual-axis motor is connected to an external power supply;

[0022] Eccentric counterweights, one side of each of which is rotatably mounted on the outer wall of the gearbox via a rotating shaft and a bearing, wherein the rotating shafts in the middle of two of the eccentric counterweights are fixedly connected to the output shaft of the dual-shaft motor, and the rotating shafts in the middle of the other two eccentric counterweights are fixedly connected;

[0023] There are two number two gears, which are respectively engaged with the rotating shafts in the middle of the two eccentric counterweights on the same side.

[0024] Through the above technical solution design, the dual-axis motor is turned on, and the output end of the dual-axis motor rotates. Through the meshing transmission of the No. 2 gear, the eccentric counterweight blocks all start to rotate. Due to the elastic force of the compression spring and the eccentric counterweight blocks according to their eccentric weight and eccentric moment, centrifugal force is generated during high-speed rotation, driving the movable rod to swing back and forth up and down in the middle of the fixed bar, thereby helping to filter and screen the masterbatch in the screening frame.

[0025] As a further improvement of the present invention, a guide groove is provided in the middle of the fixing bar, and a guide strip is integrally formed on the outer side wall of the movable rod at an equal rounded corner, and the guide strip slides in the guide groove.

[0026] Through the above technical solution design, the setting of the guide strip and the guide groove facilitates the guidance and limitation of the up and down movement of the movable rod.

[0027] As a further improvement of the present invention, the secondary feeding mechanism comprises:

[0028] An installation box is fixedly arranged on the left side wall of the box body, and the lower end of the guide pipe is fixedly connected to the bottom of the installation box. A feeding pipe is fixedly arranged on the side wall of the upper side of the installation box, and the feeding pipe is extended above the feed hopper;

[0029] A spiral conveying roller, wherein the spiral conveying roller is rotatably arranged inside the installation box through a bearing, and the outer side of the spiral conveying roller is arranged to conflict with the inner side wall of the installation box;

[0030] Motor No. 3, the motor No. 3 is fixedly arranged on the top surface of the installation box through a motor bracket, and the output shaft of the motor No. 3 is fixedly connected to the upper end of the spiral conveying roller; the motor No. 3 is connected to an external power supply.

[0031] Through the above technical design, the guide tube transports the masterbatch to the inside of the installation box, and the No. 3 motor drives the spiral conveyor roller to rotate, and then drives the raw material to rise through the spiral conveyor roller, and finally transports it to the inside of the feed hopper through the feeding pipe for secondary grinding.

[0032] As a further improvement of the present invention, the feeding pipe and the guide pipe are both arranged in an inclined shape to facilitate the discharge of the masterbatch.

[0033] Compared with the prior art, the present invention has the following beneficial effects:

[0034] 1. When multiple grinding is required, the sieved fine material is repeatedly transported through the guide pipe to the inside of the secondary feeding mechanism, and then enters the box for repeated grinding, without the need for manual re-feeding;

[0035] 2. The ground masterbatch is screened and filtered by the filtering and screening mechanism and the screening drive mechanism, so that a small amount of incompletely ground masterbatch can be screened out. After collection, it can be transported to the feed hopper for re-grinding;

[0036] 3. The screening drive mechanism drives the screening frame to vibrate up and down, assisting the screening frame in screening and filtering, thereby improving the screening efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. 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 paying any creative work.

[0038] Figure 1 It is a structural schematic diagram of the present invention.

[0039] Figure 2 It is a rear view of the present invention.

[0040] Figure 3 It is a schematic diagram of the internal structure of the present invention.

[0041] Figure 4 yes Figure 3 Enlarged view of part A in .

[0042] Figure 5 It is a structural schematic diagram of the filtering and screening mechanism and the screening drive mechanism of the present invention.

[0043] Figure 6 It is a structural schematic diagram of the movable rod and the fixed bar of the present invention.

[0044] Description of reference numerals:

[0045] Box body 1, feed hopper 2, grinding roller 3, No. 1 motor 4, No. 1 gear 5, sealing door 6, guide pipe 7, discharge pipe 8, guide block 9, guide trough 10, filtering and screening mechanism 11, fixed frame 11-1, screening frame 11-2, No. 2 motor 11-3, screening drive mechanism 12, fixed bar 12-1, movable rod 12-2, gear box 12-3, compression spring 12-4, dual-axis motor 12-5, eccentric counterweight 12-6, No. 2 gear 12-7, guide bar 13, guide trough 14, secondary feeding mechanism 15, installation box 15-1, feeding pipe 15-2, spiral conveying roller 15-3, No. 3 motor 15-4. DETAILED DESCRIPTION

[0046] The present invention will be further described below with reference to the accompanying drawings.

[0047] Example 1:

[0048] See Figure 1-6 As shown, this embodiment comprises a box body 1, a feed hopper 2, a grinding roller 3, a No. 1 motor 4 and a No. 1 gear 5. A feed hopper 2 is welded on the top surface of the box body 1. Two grinding rollers 3 are symmetrically arranged inside the box body 1 for rotation through bearings. The rear ends of the central axes of the two grinding rollers 3 rotate through the rear side wall of the box body 1 through the bearings and are fixedly connected to the No. 1 gear 5, and the two No. 1 gears 5 are meshed with each other, so that the two grinding rollers 3 rotate in opposite directions for grinding; the front end of the central axis of one of the grinding rollers 3 rotates through the front side wall of the box body 1 through the bearings and is fixedly connected to the output end of the No. 1 motor 4; the No. 1 motor 4 is connected to an external power supply; a material guide block 9 is fixedly arranged inside the box body 1 on the upper side of the two grinding rollers 3 by bolts, and the top surface of the material guide block 9 is arranged to be inclined inwardly; the arrangement of the material guide block 9 facilitates the introduction of the masterbatch raw material into the middle of the two grinding rollers 3 to avoid splashing everywhere;

[0049] It also contains:

[0050] A filtering and screening mechanism 11 is provided inside the box body 1 below the grinding roller 3 and is provided in conjunction with a discharge port provided on the right side wall of the box body 1. A sealing door 6 is provided on the discharge port through a hinge. A guide trough 10 is provided on the right side wall of the box body 1 below the discharge port and is fixed and tilted by bolts. The provision of the guide trough 10 facilitates the output of the large particles of raw materials screened out and facilitates their collection.

[0051] A screening drive mechanism 12, which is arranged at the bottom of the filtering and screening mechanism 11;

[0052] The secondary loading mechanism 15 is arranged on one side of the box body 1 and is connected to the discharge port at the bottom of the box body 1 through the guide pipe 7; the bottom of the guide pipe 7 is fixedly connected with a discharge pipe 8, and the guide pipe 7 and the discharge pipe 8 are both equipped with control valves to facilitate the control of the on and off of the guide pipe 7 and the discharge pipe 8.

[0053] Example 2:

[0054] See Figure 1-6 As shown, based on Example 1, the filtering and screening mechanism 11 includes:

[0055] The fixing frame 11-1 is movably arranged in the middle of the inner side of the box body 1, and the surrounding walls of the fixing frame 11-1 are in contact with the inner side wall of the box body 1;

[0056] The screening frame 11-2 is arranged on the upper side of the fixed frame 11-1, and one side of the screening frame 11-2 is rotatably connected to the top surface of the fixed frame 11-1 through an axle seat and a rotating shaft; the right side and the upper side of the screening frame 11-2 are both opened, and the surrounding walls of the screening frame 11-2 are in contact with the inner wall of the box body 1;

[0057] Motor No. 2 11-3, the motor No. 2 11-3 is fixedly arranged on the top surface of the fixed frame 11-1 through a motor bracket, and the output end of the motor No. 2 11-3 is fixedly connected to the rotating shaft in the shaft seat on one side of the screening frame 11-2. The motor No. 2 11-3 drives the screening frame 11-2 to rotate, which facilitates unloading; the motor No. 2 11-3 is connected to an external power supply.

[0058] Through the above technical solution design, the screening frame 11-2 filters and screens the particles of the masterbatch that falls from the middle of the grinding roller 3. After screening for a period of time, the sealing door 6 and the No. 2 motor 11-3 are opened, and the output shaft of the No. 2 motor 11-3 drives the screening frame 11-2 to rotate around the right rotating shaft. The large particles of masterbatch retained in the screening frame 11-2 are discharged through the discharge port. After the user collects them, they are transported from the feed hopper 2 to the box body 1 for cyclic grinding.

[0059] Example 3:

[0060] See Figure 1-6 As shown, based on Example 2, the screening drive mechanism 12 includes:

[0061] The fixing bar 12-1 is fixedly arranged on the inner side of the box body 1 at the lower side of the fixing frame 11-1. A movable rod 12-2 is movably penetrated in the middle of the fixing bar 12-1. The upper end of the movable rod 12-2 is fixed to the bottom surface of the fixing frame 11-1 by bolts. A guide groove 14 is opened in the middle of the fixing bar 12-1. A guide bar 13 is integrally formed with the outer wall of the movable rod 12-2 at an equal rounded corner. The guide bar 13 slides in the guide groove 14. The setting of the guide bar 13 and the guide groove 14 facilitates the guidance and limitation of the up and down movement of the movable rod 12-2. The lower end of the movable rod 12-2 is fixedly connected to the gear box 12-3.

[0062] Compression spring 12-4, said compression spring 12-4 is mounted on the movable rod 12-2 between the fixing bar 12-1 and the fixing frame 11-1, and the upper and lower ends of the compression spring 12-4 are fixedly connected to the bottom of the fixing frame 11-1 and the top surface of the fixing bar 12-1 respectively by bolts;

[0063] A dual-axis motor 12-5, wherein the dual-axis motor 12-5 is fixedly mounted inside the gear box 12-3 via a motor bracket; the dual-axis motor 12-5 is connected to an external power supply;

[0064] Eccentric counterweights 12-6, one side of each of the eccentric counterweights 12-6 is rotatably mounted on the outer wall of the gearbox 12-3 via a rotating shaft and a bearing, and the rotating shafts in the middle of two of the eccentric counterweights 12-6 are fixedly connected to the output shaft of the dual-axis motor 12-5, and the rotating shafts in the middle of the other two eccentric counterweights 12-6 are fixedly connected;

[0065] The second gear 12-7 is two in number and is respectively engaged with the rotating shafts in the middle of the two eccentric counterweights 12-6 on the same side.

[0066] Through the above technical solution design, the dual-axis motor 12-5 is turned on, and the output end of the dual-axis motor 12-5 rotates. Through the meshing transmission action of the second gear 12-7, the eccentric counterweight blocks 12-6 all start to rotate. Due to the elastic force of the compression spring 12-4 and the eccentric counterweight blocks 12-6 according to their eccentric weight and eccentric moment, centrifugal force is generated during high-speed rotation, driving the movable rod 12-2 to swing back and forth up and down in the middle of the fixed bar 12-1, thereby helping to filter and screen the masterbatch in the screening frame 11-2.

[0067] Example 4:

[0068] See Figure 1-6 As shown, based on Example 3, the secondary feeding mechanism 15 includes:

[0069] The installation box 15-1 is fixedly arranged on the left side wall of the box body 1, and the lower end of the guide pipe 7 is fixedly connected to the bottom of the installation box 15-1. A feeding pipe 15-2 is fixedly arranged on the side wall of the upper side of the installation box 15-1, and the feeding pipe 15-2 is extended above the feed hopper 2; the feeding pipe 15-2 and the guide pipe 7 are both inclined to facilitate the discharge of masterbatch;

[0070] A spiral conveying roller 15-3, wherein the spiral conveying roller 15-3 is rotatably arranged inside the installation box 15-1 through a bearing, and the outer side of the spiral conveying roller 15-3 is arranged to conflict with the inner side wall of the installation box 15-1;

[0071] Motor No. 3 15-4, the motor No. 3 15-4 is fixedly arranged on the top surface of the installation box 15-1 through a motor bracket, and the output shaft of the motor No. 3 15-4 is fixedly connected to the upper end of the spiral conveying roller 15-3; the motor No. 3 15-4 is connected to an external power supply.

[0072] Through the above technical solution design, the material guide tube 7 transports the masterbatch to the inside of the installation box 15-1, the No. 3 motor 15-4 drives the spiral conveying roller 15-3 to rotate, and then drives the raw material to rise through the spiral conveying roller 15-3, and finally transports it to the inside of the feed hopper 2 through the feeding tube 15-2 for secondary grinding.

[0073] The specific models of the No. 1 motor 4, the No. 2 motor 11-3, the dual-axis motor 12-5 and the No. 3 motor 15-4 are purchased, installed and used directly from the market according to the use requirements.

[0074] When using the present invention, the masterbatch raw materials are transported to the interior of the box body 1 through the feed hopper 2, and the No. 1 motor 4 is turned on, and the No. 1 motor 4 drives the grinding roller 3 to rotate through the meshing No. 1 gear 5, and the grinding roller 3 grinds the masterbatch. The masterbatch after grinding falls onto the screening frame 11-2, and the dual-axis motor 12-5 is turned on, and the output end of the dual-axis motor 12-5 rotates, and the eccentric counterweight block 12-6 starts to rotate through the meshing transmission action of the No. 2 gear 12-7. Due to the elastic force of the compression spring 12-4 and the eccentric counterweight block 12-6, centrifugal force is generated during high-speed rotation according to its eccentric weight and eccentric moment, which drives the movable rod 12-2 to swing back and forth up and down in the middle of the fixed bar 12-1, thereby helping to screen the masterbatch in the screening frame 11-2. Perform filtering and screening; after screening for a period of time, open the sealed door 6 and the No. 2 motor 11-3, and the output shaft of the No. 2 motor 11-3 drives the screening frame 11-2 to rotate around the rotating shaft on the right, and the large-particle masterbatch retained in the screening frame 11-2 is discharged through the discharge port. After the user collects it, it is transported from the feed hopper 2 to the box body 1 for cyclic grinding; the guide pipe 7 transports the masterbatch that has fallen after screening to the inside of the installation box 15-1, and the No. 3 motor 15-4 drives the spiral conveying roller 15-3 to rotate, and then drives the raw material to rise through the spiral conveying roller 15-3, and finally transports it to the inside of the feed hopper 2 through the loading pipe 15-2 for secondary grinding; after grinding is completed, the control valve on the guide pipe 7 is closed, the control valve of the discharge pipe 8 is opened, and the final discharge is carried out from the discharge pipe 8.

[0075] After adopting the above structure, the beneficial effects of this specific embodiment are:

[0076] 1. When multiple grinding is required, the sieved fine material is repeatedly transported through the guide pipe 7 to the inside of the secondary feeding mechanism 15, and then enters the inside of the box 1 for repeated grinding, without the need for manual re-feeding;

[0077] 2. The ground masterbatch is screened and filtered by the filtering and screening mechanism 11 and the screening drive mechanism 12, so that a small amount of incompletely ground masterbatch can be screened out. After collection, it can be transported to the feed hopper 2 for re-grinding;

[0078] 3. The screening drive mechanism 12 drives the screening frame 11-2 to vibrate up and down, assisting the screening frame 11-2 in screening and filtering, thereby improving the screening efficiency.

[0079] The above description is only used to illustrate the technical solution of the present invention and is not intended to limit it. Other modifications or equivalent substitutions made to the technical solution of the present invention by ordinary technicians in this field should be included in the scope of the claims of the present invention as long as they do not depart from the spirit and scope of the technical solution of the present invention.

Claims

1. A color masterbatch grinding machine that is convenient for filtering and screening, comprising a housing (1), a feed hopper (2), a grinding roller (3), a No. 1 motor (4) and a No. 1 gear (5), wherein the feed hopper (2) is provided on the top surface of the housing (1), and two grinding rollers (3) are symmetrically provided inside the housing (1) for rotation via bearings, wherein the rear ends of the central axes of the two grinding rollers (3) rotate through the rear side wall of the housing (1) via bearings and are fixedly connected to the No. 1 gear (5), and the two No. 1 gears (5) are meshed with each other; wherein the front end of the central axis of one of the grinding rollers (3) rotates through the front side wall of the housing (1) via bearings and is fixedly connected to the output end of the No. 1 motor (4); and the No. 1 motor (4) is connected to an external power supply; It is characterized by: It also contains: A filtering and screening mechanism (11), the filtering and screening mechanism (11) is arranged inside the box (1) below the grinding roller (3), and is arranged in conjunction with a discharge port opened on the right side wall of the box (1), and a sealing door (6) is provided on the discharge port through a hinge rotation; A screening drive mechanism (12), wherein the screening drive mechanism (12) is arranged at the bottom of the filtering and screening mechanism (11); A secondary feeding mechanism (15) is provided on one side of the box body (1) and is connected to a discharge port at the bottom of the box body (1) via a guide pipe (7); a discharge pipe (8) is fixedly provided at the bottom of the guide pipe (7), and both the guide pipe (7) and the discharge pipe (8) are provided with control valves; The filtering and screening mechanism (11) comprises: A fixed frame (11-1), wherein the fixed frame (11-1) is movably arranged in the middle of the inner side of the box body (1), and the surrounding walls of the fixed frame (11-1) are arranged in contact with the inner side wall of the box body (1); A screening frame (11-2), wherein the screening frame (11-2) is arranged on the upper side of the fixed frame (11-1), and one side of the screening frame (11-2) is rotatably connected to the top surface of the fixed frame (11-1) via an axle seat and a rotating shaft; the right side and the upper side of the screening frame (11-2) are both arranged in an open shape, and the surrounding ring wall of the screening frame (11-2) is arranged in contact with the inner side wall of the box body (1); A second motor (11-3), the second motor (11-3) being fixedly arranged on the top surface of the fixed frame (11-1) via a motor bracket, and an output end of the second motor (11-3) being fixedly connected to a rotating shaft in a shaft seat on one side of the screening frame (11-2); the second motor (11-3) being connected to an external power supply; The screening drive mechanism (12) comprises: A fixing bar (12-1), wherein the fixing bar (12-1) is fixedly arranged on the inner side of the box body (1) below the fixing frame (11-1); a movable rod (12-2) is movably provided through the middle of the fixing bar (12-1); the upper end of the movable rod (12-2) is fixedly arranged on the bottom surface of the fixing frame (11-1); and the lower end of the movable rod (12-2) is fixedly connected to a gear box (12-3); A compression spring (12-4), wherein the compression spring (12-4) is sleeved on the movable rod (12-2) between the fixing bar (12-1) and the fixing frame (11-1), and the upper and lower ends of the compression spring (12-4) are fixedly connected to the bottom of the fixing frame (11-1) and the top surface of the fixing bar (12-1), respectively; A dual-axis motor (12-5), wherein the dual-axis motor (12-5) is fixedly arranged inside the gear box (12-3) via a motor bracket; the dual-axis motor (12-5) is connected to an external power supply; Eccentric counterweights (12-6), one side of each of the eccentric counterweights (12-6) being rotatably disposed on the outer wall of the gearbox (12-3) via a rotating shaft and a bearing, wherein the rotating shafts in the middle of two of the eccentric counterweights (12-6) are fixedly connected to the output shaft of the dual-shaft motor (12-5), and the rotating shafts in the middle of the other two eccentric counterweights (12-6) are fixedly connected; The second gear (12-7) is two in number and is respectively engaged with the rotating shafts in the middle of two eccentric counterweights (12-6) on the same side; The secondary feeding mechanism (15) comprises: An installation box (15-1), wherein the installation box (15-1) is fixedly arranged on the left side wall of the box body (1), and the lower end of the material guide pipe (7) is fixedly connected and arranged at the bottom of the installation box (15-1), and a feeding pipe (15-2) is fixedly arranged on the side wall of the upper side of the installation box (15-1), and the feeding pipe (15-2) is extended above the feed hopper (2); A spiral conveying roller (15-3), wherein the spiral conveying roller (15-3) is rotatably arranged inside the installation box (15-1) via a bearing, and the outer side of the spiral conveying roller (15-3) is arranged to abut against the inner side wall of the installation box (15-1); A No. 3 motor (15-4) is fixedly arranged on the top surface of the installation box (15-1) through a motor bracket, and an output shaft of the No. 3 motor (15-4) is fixedly connected to the upper end of the spiral conveying roller (15-3); the No. 3 motor (15-4) is connected to an external power supply.

2. A grinder for color masterbatch that is convenient for filtering and screening according to claim 1, characterized in that: A material guide block (9) is fixedly arranged inside the box body (1) on the upper side of the two grinding rollers (3), and the top surface of the material guide block (9) is arranged in an inwardly inclined shape.

3. The grinder for color masterbatch that is convenient for filtering and screening according to claim 1, characterized in that: A material guide trough (10) is fixedly and obliquely provided on the right side wall of the box body (1) below the discharge port.

4. The grinder for color masterbatch that is convenient for filtering and screening according to claim 1, characterized in that: A guide groove (14) is provided in the middle of the fixed bar (12-1), and a guide bar (13) is integrally formed on the outer wall of the movable rod (12-2) with an equal rounded corner, and the guide bar (13) slides in the guide groove (14).

5. The grinder for color masterbatch that is convenient for filtering and screening according to claim 1, characterized in that: The feeding pipe (15-2) and the material guiding pipe (7) are both arranged in an inclined shape.

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