A plastic masterbatch raw material weighing device

CN224286083UActive Publication Date: 2026-05-26ZAOYANG SHUANGXINGWEIYE PLASTIFY CO
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
ZAOYANG SHUANGXINGWEIYE PLASTIFY CO
Filing Date
2025-08-04
Publication Date
2026-05-26

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Abstract

This utility model relates to the technical field of weighing devices and discloses a weighing device for plastic masterbatch raw materials. The device includes a frame, a hopper fixedly connected to the outside of the crossbeam, a weighing box fixedly connected to the upper surface of the base plate, a straight rod fixedly connected inside the weighing box, a pointer fixedly connected to the outside of the pointer rod, and a dial fixedly connected to the outside of the weighing box. This utility model has the following advantages and effects: when the weighing pan is subjected to force, it presses down on the vertical rod, thereby causing the first and second levers to be stressed. Through the combined action of the first, second, third, and fourth rotating rods, a fulcrum is formed, causing the pointer to rotate when the pointer rod rotates. The value is obtained from the scale on the dial corresponding to the pointer. Subtracting this value from the scale value corresponding to the empty weighing yields the weight of the plastic masterbatch raw material inside the weighing pan. This operation achieves excellent weighing results for plastic masterbatch.
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Description

Technical Field

[0001] This utility model relates to the technical field of white pad processing equipment, and in particular to a weighing device for plastic masterbatch raw materials. Background Technology

[0002] Masterbatch, also known as plastic masterbatch or masterbatch material, is a plastic processing aid that emerged in the 1980s. It is composed of excessive amounts of chemical additives, carrier resin, and dispersants. Masterbatch is an aggregate obtained by uniformly loading an excessive amount of pigment (dye) into the resin.

[0003] In the prior art, such as the plastic masterbatch weighing machine disclosed in Chinese Patent Publication No. CN221764629U, which belongs to the field of plastic masterbatch weighing machines, in order to solve the problem that metal particles are easily contained inside plastic masterbatch during production, and that during the screening and weighing process of plastic masterbatch, only the size of the plastic masterbatch is screened, and the metal particles are difficult to remove, affecting the subsequent use of plastic masterbatch; this application uses a motor to drive an electromagnetic block and a rotating rod to rotate. At this time, the plastic masterbatch can rotate in the storage tank, and the electromagnetic block can be energized to attract the metal particles in the plastic masterbatch, completing the magnetic attraction of the metal particles. The top cover of the storage tank can be removed to remove the metal particles. Then, the electric push rod can drive the baffle plate to reciprocate, so that the baffle plate moves away from the bottom opening of the discharge pipe. At this time, the plastic masterbatch can fall downward under the action of gravity and enter the bottom frame. The weighing scale can complete the weighing of the plastic masterbatch.

[0004] In actual production, although this type of plastic masterbatch weighing machine can also weigh plastic masterbatch, the weight of the plastic masterbatch is not fixed. The weighing scale needs to be equipped with different weights to weigh different quantities of plastic masterbatch. This type of plastic masterbatch weighing machine does not have extra weights, which limits its ability to weigh plastic masterbatch and results in poor performance of the device. Therefore, it needs to be improved. Utility Model Content

[0005] The purpose of this invention is to provide a weighing device for plastic masterbatch raw materials, which has a good effect on weighing plastic masterbatch.

[0006] The above-mentioned technical objective of this utility model is achieved through the following technical solution: A plastic masterbatch raw material weighing device includes a frame, a base plate fixedly connected to the outside of the frame, a crossbeam fixedly connected to the outside of the frame, a hopper fixedly connected to the outside of the crossbeam, a material pipe fixedly connected to the outside of the hopper, a weighing box fixedly connected to the upper surface of the base plate, a moving square hole opened inside the weighing box, a supporting plate provided outside the weighing box, a weighing pan provided on the upper surface of the supporting plate, a straight rod fixedly connected inside the weighing box, a vertical rod fixedly connected to the bottom of the supporting plate, a first rotating rod provided outside the straight rod, a second rotating rod provided outside the straight rod, and a second rotating rod provided outside the vertical rod. A third rotating rod is provided, and a fourth rotating rod is provided outside the vertical rod. A first lever is provided inside the weighing box, and a second lever is provided inside the weighing box. One end of the first lever is rotatably connected to the fourth rotating rod, and the other end of the first lever is rotatably connected to the second rotating rod. One end of the second lever is rotatably connected to the third rotating rod, and the other end of the second lever is rotatably connected to the first rotating rod. A pointer rod is provided inside the weighing box, and one end of the pointer rod is rotatably connected to the second rotating rod. A pointer is fixedly connected to the outside of the pointer rod. An arc-shaped groove is opened inside the weighing box, and the pointer passes through the inside of the arc-shaped groove. A dial is fixedly connected to the outside of the weighing box, and a weight is provided outside the pointer rod.

[0007] By adopting the above technical solution, when the weighing pan is not filled with plastic masterbatch, the dial corresponding to the pointer is observed and recorded. Then, according to the amount of material, the corresponding weight is hung on the upper surface of the pointer rod. The plastic masterbatch raw material is poured into the hopper, and flows from the hopper into the weighing pan through the feed pipe. After the weighing pan is subjected to force, it presses the vertical rod downward, thereby causing the first and second levers to be subjected to force. Through the combined action of the first, second, third, and fourth rotating rods, a fulcrum is formed. At the same time, the pointer rod rotates together with the weight and then stops, making... The needle bar, carrying the weight, maintains balance with the downward force of the vertical bar, causing the needle bar to rotate and also rotating the pointer. The value is obtained by observing the scale on the dial corresponding to the pointer. Subtracting this value from the scale value observed when there are no plastic masterbatches inside the weighing pan gives the weight of the plastic masterbatch material inside. In this way, by selectively installing weights on the needle bar according to the amount of plastic masterbatch material inside the weighing pan, the weight of different plastic masterbatch materials can be measured. Through the above operation, a good weighing effect for plastic masterbatch is achieved.

[0008] A further feature of this invention is that a hook is fixedly connected to the outside of the pointer rod, and the weight is inserted into the hook.

[0009] By adopting the above technical solution, the hook facilitates the quick installation and removal of the weights on the scale.

[0010] A further feature of this invention is that the hopper is externally fixedly connected with a hanging ear, and the hanging ear is bolted to the frame.

[0011] By adopting the above technical solution, the bolted connection between the lugs and the frame reduces the pressure of the outer wall of the hopper on the crossbeam.

[0012] A further feature of this invention is that a stabilizing bracket is provided on the outside of the material tube, one end of the stabilizing bracket is fixedly connected to the hopper, and the other end of the stabilizing bracket is fixedly connected to the frame.

[0013] By adopting the above technical solution, the two stable supports provide stable support for the hopper.

[0014] A further feature of this invention is that a small ball support is fixedly connected to the outside of the pointer rod, and a small metal ball is fixedly connected to the outside of the small ball support.

[0015] By adopting the above technical solution, when the plastic masterbatch material in the weighing pan is poured out, the pointer needs to be returned to zero. The weighing pan is no longer under pressure. At this time, the metal ball drives the pointer rod to fall back, so that the pointer quickly returns to zero.

[0016] A further feature of this invention is that a motor bracket is fixedly connected inside the hopper, a motor is fixedly connected outside the motor bracket, a stirring blade is provided inside the hopper, and the output end of the motor is fixedly connected to the stirring blade.

[0017] By adopting the above technical solution, the motor is started, and the output end of the motor drives the stirring blade to rotate. The rotating stirring blade comes into contact with the plastic masterbatch raw material poured into the hopper, preventing the plastic masterbatch raw material from accumulating inside the hopper and being unable to flow down.

[0018] A further feature of this invention is that a dustproof box is fixedly connected to the outside of the motor bracket, and the dustproof box is made of fiberglass.

[0019] By adopting the above technical solution, the fiberglass dust box is sturdy and durable, preventing plastic masterbatch raw materials from entering the motor and damaging it.

[0020] A further feature of this invention is that a rubber layer is provided on the upper surface of the stirring blade, and the thickness of the rubber layer is five centimeters.

[0021] By adopting the above technical solution, the five-centimeter rubber layer prevents damage to the surface of the plastic masterbatch raw material when the stirring blade is subjected to force.

[0022] A further feature of this invention is that the weighing box is provided with a door on its exterior, and the weighing plate is provided with a hinge on its exterior, with one end of the hinge being hinged to the door and the other end of the hinge being hinged to the weighing box.

[0023] By adopting the above technical solution, workers can quickly open the box door using the hinges, making it easy to add or remove weights as needed for the device.

[0024] A further feature of this invention is that a spring is provided on the outside of the hinge, one end of the spring is fixedly connected to the door of the weighing box, the other end of the spring is fixedly connected to the inside of the weighing box, and a bolt head is fixedly connected to the outside of the door of the weighing box.

[0025] By adopting the above technical solution, after the worker pulls the bolt to open the box door, the box door and the weighing box will automatically close due to the action of the spring.

[0026] The beneficial effects of this utility model are:

[0027] 1. This utility model, through the arrangement of a frame, base plate, crossbeam, hopper, material pipe, weighing box, moving square hole, bearing plate, weighing pan, straight rod, vertical rod, first rotating rod, second rotating rod, third rotating rod, fourth rotating rod, first lever, second lever, pointer rod, pointer, arc groove, dial, and weights, allows observation and recording of the dial corresponding to the pointer when the weighing pan is empty. Then, according to the amount of material, the corresponding weights are hung on the upper surface of the pointer rod. Plastic masterbatch raw material is poured into the hopper, and flows from the hopper into the weighing pan through the material pipe. The weighing pan, under pressure, presses the vertical rod downwards, thereby causing the first and second levers to be stressed. Through the first rotating rod, The combined action of the second, third, and fourth rotating rods forms a fulcrum. Simultaneously, the pointer rod, carrying the weight, rotates and stops, balancing the force exerted by the pointer rod and the downward pressure of the vertical rod. This rotation of the pointer also drives the pointer to rotate, and the value is obtained from the scale reading on the dial corresponding to the pointer. Subtracting this value from the scale reading when no plastic masterbatch is loaded gives the weight of the plastic masterbatch material inside the weighing pan. By selectively installing weights on the pointer rod based on the amount of plastic masterbatch material inside the weighing pan, the weight of different plastic masterbatch materials can be measured. This operation achieves excellent weighing results for plastic masterbatch.

[0028] 2. This utility model, through the arrangement of hooks, hanging ears, stabilizing brackets, small ball brackets, metal balls, motor brackets, motors, stirring blades, dustproof boxes, rubber layers, boxes, hinges, springs, and door bolts, allows for the quick installation and removal of weights. The hanging ears, connected to the frame, reduce the pressure of the hopper's outer wall on the crossbeam. Two stabilizing brackets provide stable support for the hopper. When the plastic masterbatch material in the weighing pan is poured out, the pointer needs to return to zero, and the weighing pan is no longer under pressure. At this time, the metal ball drives the pointer rod to fall back, causing the pointer to quickly return to zero, starting the motor. The output end drives the stirring blades to rotate. The rotating stirring blades contact the plastic masterbatch material poured into the hopper, preventing the plastic masterbatch material from accumulating inside the hopper and being unable to flow down. The fiberglass dustproof box is sturdy and durable, preventing the plastic masterbatch material from entering the motor and damaging it. A five-centimeter rubber layer prevents the stirring blades from damaging the surface of the plastic masterbatch material when it is being stirred. Workers can quickly open the box door using the hinges to easily add or remove weights as needed. After the worker pulls the door bolt to open the box door, the spring action will automatically close the box door and the weighing box. Attached Figure Description

[0029] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0030] Figure 1 This is a schematic diagram of the structure of this utility model;

[0031] Figure 2 This is a schematic diagram of the load-bearing plate and vertical rod structure of this utility model;

[0032] Figure 3 This is a schematic diagram of the motor and stirring blade structure of this utility model;

[0033] Figure 4 This utility model Figure 1 A magnified structural diagram of point A in the middle.

[0034] In the diagram: 1. Frame; 2. Base plate; 3. Crossbeam; 4. Hopper; 5. Material pipe; 6. Weighing box; 7. Square hole; 8. Loading plate; 9. Weighing pan; 10. Straight rod; 11. Vertical rod; 12. First rotating rod; 13. Second rotating rod; 14. Third rotating rod; 15. Fourth rotating rod; 16. First lever; 17. Second lever; 18. Pointer rod; 19. Pointer; 20. Arc groove; 21. Dial; 22. Weight; 23. Hook; 24. Hanging lug; 25. Stabilizing bracket; 26. Small ball bracket; 27. Motor bracket; 28. Motor; 29. ​​Stirring blade; 30. Dustproof box; 31. Rubber layer; 32. Box door; 33. Hinge; 34. Spring; 35. Door bolt head; 36. Metal ball. Detailed Implementation

[0035] The technical solution of this utility model will now be clearly and completely described with reference to specific embodiments. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0036] Reference Figure 1-4A plastic masterbatch raw material weighing device includes a frame 1, a base plate 2 fixedly connected to the outside of the frame 1, a crossbeam 3 fixedly connected to the outside of the frame 1, a hopper 4 fixedly connected to the outside of the crossbeam 3, a material pipe 5 fixedly connected to the outside of the hopper 4, a weighing box 6 fixedly connected to the upper surface of the base plate 2, a moving square hole 7 opened inside the weighing box 6, a supporting plate 8 set outside the weighing box 6, a weighing pan 9 set on the upper surface of the supporting plate 8, a straight rod 10 fixedly connected inside the weighing box 6, a vertical rod 11 fixedly connected to the bottom of the supporting plate 8, a first rotating rod 12 set outside the straight rod 10, a second rotating rod 13 set outside the straight rod 10, a third rotating rod 14 set outside the vertical rod 11, and a fourth rotating rod 15 set outside the vertical rod 11. The weighing box 6 has a first lever 16 and a second lever 17. One end of the first lever 16 is rotatably connected to the fourth rotating rod 15, and the other end is rotatably connected to the second rotating rod 13. One end of the second lever 17 is rotatably connected to the third rotating rod 14, and the other end is rotatably connected to the first rotating rod 12. The weighing box 6 has a pointer rod 18, one end of which is rotatably connected to the second rotating rod 13. A pointer 19 is fixedly connected to the outside of the pointer rod 18. The weighing box 6 has an arc-shaped groove 20, through which the pointer 19 passes. A dial 21 is fixedly connected to the outside of the weighing box 6, and a weight 22 is mounted on the outside of the pointer rod 18. The weighing box 9 is used for observation when no plastic masterbatch is installed. The dial 21 corresponding to pointer 19 is recorded. Then, according to the amount of material, the corresponding weight 22 is hung on the upper surface of pointer rod 18. The plastic masterbatch raw material is poured into the hopper 4. The plastic masterbatch raw material flows from the hopper 4 to the weighing pan 9 through the feed pipe 5. After the weighing pan 9 is subjected to force, it presses the vertical rod 11 downward, thereby causing the first lever 16 and the second lever 17 to be subjected to force. The fulcrum is formed by the combined action of the first rotating rod 12, the second rotating rod 13, the third rotating rod 14, and the fourth rotating rod 15. At the same time, pointer rod 18 rotates together with the weight 22 and then stops, so that the force of pointer rod 18 with the weight 22 and the downward pressure of vertical rod 11 are balanced. When pointer rod 18 rotates, it also drives pointer 19 to rotate. The dial corresponding to pointer 19 is recorded. The value is obtained from the scale on pointer 21. Subtracting this value from the scale value corresponding to pointer 19 when no plastic masterbatch is loaded gives the weight of the plastic masterbatch material inside weighing pan 9. In this way, based on the amount of plastic masterbatch material inside weighing pan 9, weights 22 can be installed on pointer 18 to measure the weight of different plastic masterbatch materials. This operation achieves excellent weighing results for plastic masterbatch. A hook 23 is fixedly connected to the outside of pointer 18, and the weights 22 are inserted into the hook 23. The hook 23 facilitates the quick installation and removal of the weights 22. A hanging ear 24 is fixedly connected to the outside of hopper 4, and the hanging ear 24 is bolted to frame 1.To reduce the pressure of the outer wall of the hopper 4 on the crossbeam 3, a stabilizing bracket 25 is installed on the outside of the material pipe 5. One end of the stabilizing bracket 25 is fixedly connected to the hopper 4, and the other end is fixedly connected to the frame 1. The two stabilizing brackets 25 provide stable support for the hopper 4. A small ball bracket 26 is fixedly connected to the outside of the pointer rod 18, and a metal ball 36 is fixedly connected to the outside of the small ball bracket 26. When the plastic masterbatch material in the weighing pan 9 is poured out, the pointer 19 needs to be zeroed, and the weighing pan 9 is no longer under pressure. At this time, the metal ball 36... The pointer lever 18 is driven to fall back, causing the pointer 19 to quickly return to zero. A motor bracket 27 is fixedly connected inside the hopper 4, and a motor 28 is fixedly connected to the outside of the motor bracket 27. An agitator 29 is installed inside the hopper 4. The output end of the motor 28 is fixedly connected to the agitator 29. When the motor 28 is started, its output end drives the agitator 29 to rotate. The rotating agitator 29 contacts the plastic masterbatch material poured into the hopper 4, preventing the plastic masterbatch material from accumulating inside the hopper 4 and hindering its flow. The motor bracket 27 is fixedly connected to the outside of the motor bracket 27. A dustproof box 30 is fixedly connected to the motor 28. The dustproof box 30 is made of fiberglass, which is sturdy and durable, preventing plastic masterbatch material from entering the motor 28 and damaging it. A rubber layer 31 with a thickness of five centimeters is provided on the upper surface of the stirring blade 29. The five-centimeter-thick rubber layer 31 prevents damage to the surface of the plastic masterbatch material when the stirring blade 29 is subjected to force. The weighing box 6 is equipped with a door 32, and the weighing plate 8 is equipped with a hinge 33. One end of the hinge 33 is hinged to the door 32, and the other end is hinged to the weighing box 6. The worker can quickly open the door 32 using the hinge 33 to easily add or remove weights 22 as needed. A spring 34 is installed on the outside of the hinge 33. One end of the spring 34 is fixedly connected to the door 32, and the other end is fixedly connected to the inside of the weighing box 6. A latch head 35 is fixedly connected to the outside of the door 32. After the worker pulls the latch head 35 to open the door 32, the spring 34 automatically closes the door 32 and the weighing box 6.

[0037] In this invention, when the weighing pan 9 is not filled with plastic masterbatch, the dial 21 corresponding to the pointer 19 is observed and recorded. Then, according to the amount of material, the corresponding weight 22 is hung on the upper surface of the pointer rod 18. The plastic masterbatch material is poured into the hopper 4 and flows from the hopper 4 to the weighing pan 9 through the feed pipe 5. After the weighing pan 9 is subjected to force, it presses the vertical rod 11 downward, thereby causing the first lever 16 and the second lever 17 to be subjected to force. The fulcrum is formed by the combined action of the first rotating rod 12, the second rotating rod 13, the third rotating rod 14, and the fourth rotating rod 15. At the same time, the pointer rod 18 carries the weight 22. 2. After rotating together, stop, so that the pointer rod 18, carrying the weight 22, is balanced with the downward force of the vertical rod 11. When the pointer rod 18 rotates, it also drives the pointer 19 to rotate. The value is obtained from the scale on the dial 21 corresponding to the pointer 19. Subtracting this value from the scale value observed when the plastic masterbatch is not loaded gives the weight of the plastic masterbatch material inside the weighing pan 9. In this way, based on the amount of plastic masterbatch material inside the weighing pan 9, weights 22 can be selectively installed on the pointer rod 18 to measure the weight of different plastic masterbatch materials. Through the above operation... This design achieves excellent weighing results for plastic masterbatch. Hook 23 facilitates the quick installation and removal of the weights 22. The hanging ears 24 are connected to the frame 1, reducing the pressure of the outer wall of the hopper 4 on the crossbeam 3. Two stable supports 25 provide stable support for the hopper 4. When the plastic masterbatch material in the weighing pan 9 is poured out, the pointer 19 needs to be zeroed. The weighing pan 9 is no longer under pressure. At this time, the metal ball 36 drives the pointer rod 18 to fall back, causing the pointer 19 to quickly return to zero. The motor 28 is then started, and its output drives the stirring blade 29 to rotate. The rotating stirring blade 29 interacts with the material poured into the hopper 4. The plastic masterbatch material is in contact with the hopper 4 to prevent it from accumulating inside and not flowing down. The fiberglass dust box 30 is sturdy and durable, preventing the plastic masterbatch material from entering the motor 28 and damaging it. The five-centimeter rubber layer 31 prevents the stirring blade 29 from damaging the surface of the plastic masterbatch material when it is being stirred. The worker can quickly open the box door 32 by using the hinge 33 to add or remove the weights 22 as needed. After the worker pulls the door bolt 35 to open the box door 32, the box door 32 and the weighing box 6 will automatically close due to the action of the spring 34.

[0038] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A plastic masterbatch raw material weighing device, comprising a frame (1), characterized in that: The frame (1) is fixedly connected to a base plate (2), and a crossbeam (3) is fixedly connected to the outside of the frame (1). A hopper (4) is fixedly connected to the outside of the crossbeam (3), and a material pipe (5) is fixedly connected to the outside of the hopper (4). A weighing box (6) is fixedly connected to the upper surface of the base plate (2). A moving square hole (7) is opened inside the weighing box (6). A load-bearing plate (8) is provided on the outside of the weighing box (6). The upper surface of (8) is provided with a weighing pan (9), a straight rod (10) is fixedly connected inside the weighing box (6), a vertical rod (11) is fixedly connected to the bottom of the weighing pan (8), a first rotating rod (12) is provided outside the straight rod (10), a second rotating rod (13) is provided outside the straight rod (10), a third rotating rod (14) is provided outside the vertical rod (11), and a fourth rotating rod (15) is provided outside the vertical rod (11). The weighing box (6) is provided with a first lever (16) and a second lever (17). One end of the first lever (16) is rotatably connected to a fourth rotating rod (15), and the other end of the first lever (16) is rotatably connected to a second rotating rod (13). One end of the second lever (17) is rotatably connected to a third rotating rod (14), and the other end of the second lever (17) is rotatably connected to a first rotating rod (12). The weighing box (6) is provided with a pointer rod (18), one end of the pointer rod (18) is rotatably connected to a second rotating rod (13), and a pointer (19) is fixedly connected to the outside of the pointer rod (18). The weighing box (6) is provided with an arc-shaped groove (20), and the pointer (19) passes through the inside of the arc-shaped groove (20). The weighing box (6) is fixedly connected with a dial (21), and a weight (22) is provided on the outside of the pointer rod (18).

2. The plastic masterbatch raw material weighing device according to claim 1, characterized in that: The pointer rod (18) is externally fixedly connected to a hook (23), and the weight (22) is inserted into the hook (23).

3. The plastic masterbatch raw material weighing device according to claim 1, characterized in that: The hopper (4) is fixedly connected to the outside with a hanging ear (24), which is bolted to the frame (1).

4. The plastic masterbatch raw material weighing device according to claim 1, characterized in that: The material pipe (5) is provided with a stabilizing bracket (25) on its outside. One end of the stabilizing bracket (25) is fixedly connected to the hopper (4), and the other end of the stabilizing bracket (25) is fixedly connected to the frame (1).

5. The plastic masterbatch raw material weighing device according to claim 1, characterized in that: The pointer rod (18) is fixedly connected to a ball support (26), and a metal ball (36) is fixedly connected to the outside of the ball support (26).

6. The plastic masterbatch raw material weighing device according to claim 1, characterized in that: The hopper (4) is fixedly connected to a motor bracket (27), and a motor (28) is fixedly connected to the outside of the motor bracket (27). The hopper (4) is provided with a stirring blade (29), and the output end of the motor (28) is fixedly connected to the stirring blade (29).

7. A plastic masterbatch raw material weighing device according to claim 6, characterized in that: The motor bracket (27) is externally fixedly connected to a dustproof box (30), which is made of fiberglass.

8. A plastic masterbatch raw material weighing device according to claim 6, characterized in that: The upper surface of the stirring blade (29) is provided with a rubber layer (31) with a thickness of five centimeters.

9. A plastic masterbatch raw material weighing device according to claim 1, characterized in that: The weighing box (6) is provided with a box door (32) on the outside, and the weighing plate (8) is provided with a hinge (33) on the outside. One end of the hinge (33) is hinged to the box door (32), and the other end of the hinge (33) is hinged to the weighing box (6).

10. A plastic masterbatch raw material weighing device according to claim 9, characterized in that: The hinge (33) is provided with a spring (34) on the outside. One end of the spring (34) is fixedly connected to the box door (32), and the other end of the spring (34) is fixedly connected to the inside of the weighing box (6). A bolt head (35) is fixedly connected to the outside of the box door (32).