Weighing and feeding device for coating production

Abstract

The utility model provides a weighing feeding device for paint production, which comprises a rack, the rack is provided with a feeding hopper, a feeding cylinder, a weighing bin and a material receiving bin which are communicated in sequence, the feeding cylinder comprises a first cylinder body and a second cylinder body which are connected, the first cylinder body is provided with a feeding port and a conveying assembly, the second cylinder body is provided with a plurality of blanking ports, and the feeding port is communicated with the weighing bin. The second barrel is further provided with a baffle, the rack is provided with a first driving assembly in transmission connection with the baffle, the baffle covers the face, close to the weighing bin, of the second barrel, the baffle is provided with a through hole penetrating through the baffle, and when the baffle is driven by the first driving assembly to rotate, the through hole is communicated with or staggered from the discharging openings. And when the through hole is communicated with the blanking port, the overlapped area of the through hole and the blanking port is increased or decreased along with the rotation of the baffle. According to the utility model, the technical problem that the raw materials still enter the weighing bin to generate errors after the weighing bin finishes weighing is solved, and the technical effects of reducing the weighing errors and improving the feeding precision are achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of coating production and processing, in particular to a weighing and feeding device for coating production. Background Art

[0002] Paint refers to a type of liquid or solid material that can form a thin film on the surface of an object under certain conditions to provide protection, decoration or other special functions (insulation, rust prevention, mildew prevention, heat resistance, etc.). In the production process of paint, the raw materials need to be added in proportion, so the raw materials need to be weighed before adding.

[0003] The Chinese utility model patent with the publication number CN212999605U discloses an automatic weighing and feeding device for powder coating production, including an upper hopper, a mounting frame and a conveying channel. The upper hopper is mounted on the mounting frame, and a group of support columns are vertically fixed at the four corners of the bottom surface of the mounting frame, and the upper parts of the four groups of support columns are connected with upper horizontal pressing, and the lower parts of the four groups of support columns are connected with lower horizontal plates, and the middle part of the upper end surface of the upper horizontal pressing is installed with a conveying channel; the upper parts of the two groups of support columns on the left side below the mounting frame are fixed to the upper fixed plate by fixing bolts between the weighing bin, and a receiving bin is set just below the weighing bin, and a group of lower fixed plates are connected between the front and rear sides of the receiving bin and the lower parts of the two groups of support columns on the left side. The lower end of the upper hopper of the above-mentioned automatic weighing and feeding device is set to the conveying channel, and the right end of the conveying channel is just above the weighing bin, and the lower end of the lower hopper is just above the receiving bin, which is convenient for direct delivery of raw materials and more smooth and convenient.

[0004] When the automatic weighing and feeding device disclosed in the above utility model patent is used, the raw materials are first poured into the upper hopper and then transported along the conveying channel to the weighing bin through the conveying propeller in the conveying channel. Since the left side of the conveying channel is open, when the weight of the raw materials in the weighing bin reaches the preset value and the second motor stops running, part of the raw materials in the conveying channel will continue to enter the weighing bin under the action of inertia, resulting in an error in the weight of the raw materials falling from the weighing bin into the receiving bin. Utility Model Content

[0005] In view of the deficiencies existing in the prior art, the utility model provides a weighing and feeding device for coating production, which solves the problem in the prior art that raw materials still enter the weighing bin after weighing is completed, causing errors.

[0006] According to an embodiment of the utility model, a weighing and feeding device for coating production comprises a frame, on which a feed hopper, a feeding barrel, a weighing bin and a receiving bin which are connected in sequence are arranged, the feeding barrel comprises a first barrel body and a second barrel body which are connected, the axial direction of the first barrel body is horizontal and the axial direction of the second barrel body is vertical, one end of the first barrel body away from the second barrel body is provided with a feed port connected to the feed hopper, a conveying assembly is also provided on the first barrel body and the conveying assembly transports the material in the first barrel body from the feed port to the second barrel body, and the second barrel body A side of the cylinder body close to the weighing bin is provided with a plurality of blanking openings at intervals along the circumference of the second cylinder body, and the blanking openings are aligned with the weighing bins respectively. A rotatable baffle is also provided on the second cylinder body, and a first driving assembly transmission-connected to the baffle is provided on the frame. The baffle covers a side of the second cylinder body close to the weighing bin, and a through hole penetrating the baffle is provided on the baffle. When the baffle rotates under the drive of the first driving assembly, the through hole is connected to or staggered with the blanking opening. When the through hole is connected to the blanking opening, the overlapping area of ​​the through hole and the blanking opening increases or decreases with the rotation of the baffle.

[0007] Furthermore, the conveying assembly includes a first motor and a conveying rod arranged at the output end of the first motor, the conveying rod extends into the first cylinder and is coaxially arranged with the first cylinder, and a spiral blade is provided on the portion of the conveying rod located in the first cylinder.

[0008] Furthermore, a limit sleeve is provided on the frame, which covers one end of the second cylinder close to the weighing bin and is provided with a groove connected to the blanking port. A limit groove is provided on one side of the limit sleeve close to the second cylinder, and the baffle can be rotatably arranged in the limit groove.

[0009] Furthermore, the first driving assembly includes a second motor and a driving rod arranged at the output end of the second motor, the driving rod extends into the second cylinder, a vertical transmission rod is provided on the baffle, and one end of the transmission rod away from the baffle extends into the second cylinder and cooperates with the driving rod.

[0010] Furthermore, the frame is also provided with a liftable movable plate and a second driving assembly transmission-connected to the movable plate, the second motor is arranged on the movable plate and the driving rod is provided with a sleeve portion for accommodating part of the driving rod, a plurality of first stirring paddles are arranged at intervals on the outer peripheral wall of the sleeve portion, a positioning pin is provided at one end of the driving rod away from the baffle and a positioning groove matching the positioning pin is provided in the sleeve portion.

[0011] Furthermore, the second driving assembly includes a cylinder and a telescopic rod arranged at the output end of the cylinder, the moving direction of the telescopic rod is consistent with the vertical direction, and one end of the telescopic rod away from the cylinder is fixedly connected to the movable plate.

[0012] Furthermore, a plurality of guide rods are arranged at intervals on the frame and the guide rods are respectively arranged vertically on the frame, and a guide hole corresponding to the plurality of guide rods is arranged in the middle of the movable plate.

[0013] Furthermore, a mounting plate is provided on the feed hopper and a stirring assembly is provided on the mounting plate, the stirring assembly includes a third motor and a stirring rod arranged at the output end of the third motor, the stirring rod extends into the feed hopper and a plurality of second stirring paddles are spaced apart on the outer peripheral wall of the stirring rod.

[0014] Furthermore, the weighing bin is located directly below the second cylinder and mounting brackets are respectively provided on opposite sides of the weighing bin, two weighing sensors are spaced apart on the frame, the two weighing sensors are respectively located on opposite sides of the weighing bin and the two mounting brackets are respectively abutted against the two weighing sensors in a one-to-one correspondence.

[0015] Furthermore, the material receiving bin is located directly below the weighing bin and a discharge port is provided at one end of the weighing bin close to the material receiving bin, and a solenoid valve is provided at the opening of the discharge port.

[0016] Compared with the prior art, the utility model has the following beneficial effects: by adopting a feed hopper, a feeding barrel, a weighing bin and a receiving bin which are connected in sequence and arranged on the frame, the coating raw material is poured from the feed hopper into the feeding port of the feeding barrel, and the raw material in the first barrel is transported to the second barrel by the conveying component, and after the raw material enters the second barrel, it passes through the drop-out port and enters the weighing bin for weighing, and when the weight of the raw material falling into the weighing bin is close to the preset value, the first driving component drives the baffle to rotate so that the overlapping area of ​​the through hole and the drop-out port is gradually reduced, thereby gradually The speed at which the raw materials fall into the weighing bin is gradually slowed down. When the weight of the raw materials weighed by the weighing bin reaches a preset value, the baffle is driven by the first driving component to rotate to a position where the through hole and the drop port are staggered. At this time, the baffle blocks the raw materials in the second cylinder from continuing to fall. After weighing is completed, the weighing bin is opened to allow the raw materials in the weighing bin to fall into the receiving bin, and a certain amount of raw materials can be input into the receiving bin. This solves the technical problem of errors caused by raw materials still entering the weighing bin after the weighing is completed, and produces the technical effect of reducing weighing errors and improving feeding accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic structural diagram of a weighing and feeding device for coating production according to an embodiment of the utility model;

[0018] Figure 2 A cross-sectional view of a weighing and feeding device for coating production according to an embodiment of the utility model;

[0019] Figure 3 for Figure 2 The enlarged view of point A in the middle;

[0020] Figure 4 This is an exploded view of part of the structure of a weighing and feeding device for coating production according to an embodiment of the utility model.

[0021] In the above drawings: 1, frame; 11, limit sleeve; 12, slot; 13, limit slot; 14, movable plate; 15, guide rod; 16, weighing sensor; 2, feed hopper; 21, mounting plate; 22, stirring assembly; 23, third motor; 24, stirring rod; 25, second stirring paddle; 3, feeding barrel; 31, first barrel; 32, second barrel; 33, feed port; 34, drop port; 4, weighing bin; 41, installation Bracket; 42, discharge port; 43, solenoid valve; 5, receiving bin; 6, conveying assembly; 61, first motor; 62, conveying rod; 63, spiral blade; 7, baffle; 71, through hole; 72, transmission rod; 73, positioning pin; 8, first driving assembly; 81, second motor; 82, driving rod; 83, sleeve portion; 84, first stirring paddle; 85, positioning groove; 9, second driving assembly; 91, cylinder; 92, telescopic rod. DETAILED DESCRIPTION

[0022] The technical solution of the present utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0023] like Figures 1 to 4 As shown, an embodiment of the utility model provides a weighing and feeding device for paint production, which is used to weigh raw materials during the paint production process so as to input a quantitative amount of raw materials into the production equipment in proportion.

[0024] Please refer to Figure 1 and Figure 2The weighing and feeding device for coating production comprises a frame 1, on which a feed hopper 2, a feeding barrel 3, a weighing bin 4 and a receiving bin 5 are connected in sequence. The feeding barrel 3 comprises a first barrel body 31 and a second barrel body 32 connected to each other. The axial direction of the first barrel body 31 is horizontal and the axial direction of the second barrel body 32 is vertical. The end of the first barrel body 31 away from the second barrel body 32 is provided with a feed port 33 connected to the feed hopper 2. After the raw material is poured into the feed hopper 2, it passes through the feed port 33 and enters the first barrel body 31. The first barrel 31 is also provided with a conveying component 6 The conveying assembly 6 is used to transport the material in the first cylinder 31 from the feed port 33 to the second cylinder 32, so as to feed the raw material dropped from the feed hopper 2 into the first cylinder 31 into the second cylinder 32. A plurality of drop ports 34 are provided at intervals along the circumference of the second cylinder 32 on one side of the second cylinder 32 close to the weighing bin 4. The drop ports 34 are respectively aligned with the weighing bin 4 so that the raw material dropped from the drop ports 34 enters the weighing bin 4. A rotatable baffle 7 is also provided on the cylinder, and a first drive mechanism drivingly connected to the baffle 7 is provided on the frame 1. The baffle plate 7 covers a side of the second cylinder 32 close to the weighing bin 4, and a through hole 71 penetrating the baffle plate 7 is provided on the baffle plate 7. When the baffle plate 7 is driven by the first driving assembly 8 to rotate, the through hole 71 is connected with or staggered from the drop opening 34. When the through hole 71 is connected with the drop opening 34, the material in the second cylinder 32 can pass through the drop opening 34 and fall into the weighing bin 4. When the through hole 71 is staggered from the drop opening 34, the baffle plate 7 closes the opening of the drop opening 34 and blocks the material in the second cylinder 32 from falling. When the through hole 71 is connected to the drop opening 34, the overlapping area of ​​the through hole 71 and the drop opening 34 increases or decreases with the rotation of the baffle 7. When the overlapping area of ​​the through hole 71 and the drop opening 34 gradually decreases, the drop opening 34 is gradually closed and the speed at which the raw material falls into the weighing bin 4 slows down. When the overlapping area of ​​the through hole 71 and the drop opening 34 gradually increases, the drop opening 34 gradually opens, which speeds up the speed at which the raw material falls into the weighing bin 4. The speed at which the raw material falls into the weighing bin 4 is adjusted to accurately control the weight of the raw material falling into the weighing bin 4.

[0025] Specifically, the steps for weighing the paint raw materials in the coating production weighing and feeding device provided in this embodiment are as follows: pouring the paint raw materials into the feed hopper 2, the raw materials in the feed hopper 2 pass through the feed port 33 into the first cylinder 31, starting the conveying component 6 to convey the raw materials in the first cylinder 31 to the second cylinder 32, and after the raw materials enter the second cylinder 32, they pass through the drop port 34 into the weighing bin 4 for weighing, and when the weight of the raw materials falling into the weighing bin 4 is close to a preset value, the first driving component 8 drives the baffle 7 to rotate so that the overlapping area of ​​the through hole 71 and the drop port 34 gradually decreases, so as to gradually slow down the speed at which the raw materials fall into the weighing bin 4, and when the weight of the raw materials weighed by the weighing bin 4 reaches a preset value When setting the value, the baffle 7 is driven by the first driving component 8 to rotate to the position where the through hole 71 and the blanking port 34 are staggered. At this time, the baffle 7 blocks the raw materials in the second cylinder 32 from continuing to fall. After weighing is completed, the weighing bin 4 is opened to allow the raw materials in the weighing bin 4 to fall into the receiving bin 5, so that a certain amount of raw materials can be input into the receiving bin 5 and the raw materials in the receiving bin 5 can be added to the processing equipment to complete the quantitative feeding operation; after the raw materials in the weighing bin are emptied, the first driving component 8 drives the baffle 7 to rotate so that the through hole 71 is connected to the blanking port 34 and the overlapping area of ​​the through hole 71 and the blanking port 34 gradually increases, so that the raw materials can continue to be added to the weighing bin 4, thereby continuously weighing the raw materials. The coating production weighing and feeding device provided in this embodiment controls the speed at which the raw materials enter the weighing bin 4 or blocks the raw materials from entering the weighing bin 4 through the rotation of the baffle 7, effectively reducing the weighing error and facilitating the improvement of feeding accuracy.

[0026] like Figure 2 As shown, the conveying assembly 6 includes a first motor 61 and a conveying rod 62 arranged at the output end of the first motor 61, the conveying rod 62 extends into the first barrel 31 and is coaxially arranged with the first barrel 31, and a spiral blade 63 is arranged on the portion of the conveying rod 62 located in the first barrel 31. The first motor 61 drives the conveying rod 62 to rotate and drives the spiral blade 63 to move, so that the raw materials in the first barrel 31 that are in contact with the spiral blade 63 can be conveyed in a direction close to the second barrel 32 under the action of the spiral blade 63, so that the raw materials added from the feed hopper 2 to the first barrel 31 are continuously and stably input into the second barrel 32, and the raw materials are prevented from accumulating in the first barrel 31 and causing the first barrel 31 to be blocked.

[0027] Please combine Figure 2 and Figure 4The frame 1 is also provided with a limiting sleeve 11, which covers one end of the second cylinder 32 close to the weighing bin 4 and is provided with a slot 12 connected to the drop opening 34. The limiting sleeve 11 is provided with a limiting groove 13 on one side close to the second cylinder 32, and the baffle 7 is rotatably arranged in the limiting groove 13. The limiting sleeve 11 is provided on the frame 1 for the baffle 7 to be installed, and the baffle 7 is rotatably arranged in the limiting groove 13, so that the baffle 7 can be smoothly rotated while covering the side of the second cylinder 32 close to the weighing bin 4, preventing the baffle 7 from being separated from the second cylinder 32, which is conducive to improving the structural stability of the weighing and feeding device for coating production.

[0028] like Figure 2 and Figure 3 As shown, the first driving assembly 8 includes a second motor 81 and a driving rod 82 arranged at the output end of the second motor 81, the driving rod 82 extends into the second cylinder 32, and the baffle 7 is provided with a vertical transmission rod 72, and the end of the transmission rod 72 away from the baffle 7 extends into the second cylinder 32 and cooperates with the driving rod 82. The driving rod 82 is driven to rotate by the second motor 81, and the driving rod 82 drives the transmission rod 72 to rotate, so as to drive the baffle 7 to rotate, and the second motor 81 controls the rotation angle of the driving rod 82 to adjust the rotation angle of the baffle 7, thereby changing the overlap area of ​​the through hole 71 and the drop port 34, so as to accurately control the speed of the raw materials falling into the weighing bin 4.

[0029] In detail, the frame 1 is also provided with a liftable movable plate 14 and a second driving assembly 9 transmission-connected to the movable plate 14, the second motor 81 is arranged on the movable plate 14 and the driving rod 82 is provided with a sleeve portion 83 for accommodating part of the driving rod 72, a plurality of first stirring paddles 84 are spaced apart on the outer peripheral wall of the sleeve portion 83, a locating pin 73 is provided at one end of the driving rod 82 away from the baffle 7 and a locating groove 85 matching the locating pin 73 is provided in the sleeve portion 83. When the second driving assembly 9 drives the movable plate 14 to rise so that the positioning pin 73 is disengaged from the positioning groove 85, the driving rod 82 is separated from the transmission rod 72 and the driving rod 82 rotates under the drive of the second motor 81, and the transmission rod 72 remains stationary. At this time, the blanking port 34 remains open, and the first stirring paddle 84 is driven by the driving rod 82 to rotate in the second cylinder 32 and stir the raw materials in the second cylinder 32 to prevent the raw materials from accumulating in the second cylinder 32 and causing the blanking port 34 to be blocked; when the second driving assembly 9 drives the movable plate 14 to descend, the positioning pin 73 is disengaged from the positioning groove 85, and the driving rod 82 is driven by the second motor 81 to rotate, and the transmission rod 72 remains stationary. At this time, the blanking port 34 remains open, and the first stirring paddle 84 is driven by the driving rod 82 to rotate in the second cylinder 32 and stir the raw materials in the second cylinder 32 to prevent the raw materials from accumulating in the second cylinder 32 and causing the blanking port 34 to be blocked. The positioning pin 73 extends into the positioning groove 85 to connect the driving rod 82 with the transmission rod 72, so that the transmission rod 72 can rotate under the drive of the driving rod 82, thereby driving the baffle 7 to rotate. At this time, the opening area of ​​the blanking port 34 can be adjusted or the blanking port 34 can be closed, and when the transmission rod 72 is disengaged from the driving rod 82, the rotation speed of the second motor 81 is greater than the rotation speed of the second motor 81 when the transmission rod 72 is matched with the driving rod 82, ensuring that the first stirring paddle 84 fully stirs the raw materials in the second cylinder 32, so that the raw materials in the second cylinder 32 can be stably input into the weighing bin 4.

[0030] like Figure 2 As shown, the second driving assembly 9 includes a cylinder 91 and a telescopic rod 92 arranged at the output end of the cylinder 91, the moving direction of the telescopic rod 92 is consistent with the vertical direction, and the end of the telescopic rod 92 away from the cylinder 91 is fixedly connected to the movable plate 14. The cylinder 91 drives the telescopic rod 92 to extend or retract the cylinder 91, which can drive the movable plate 14 to move in the vertical direction, and when the telescopic rod 92 extends from the cylinder 91, it pushes the movable plate 14 to descend in the vertical direction, at which time the driving rod 82 moves in the direction close to the transmission rod 72 and makes the positioning pin 73 extend into the positioning groove 85, and when the telescopic rod 92 retracts from the cylinder 91, it pulls the movable plate 14 to rise in the vertical direction, at which time the driving rod 82 moves in the direction away from the transmission rod 72 and makes the positioning pin 73 push out of the positioning groove 85, so that the weighing and feeding device for coating production is easy to operate.

[0031] Specifically, the frame 1 is provided with a plurality of guide rods 15 at intervals and the guide rods 15 are respectively vertically arranged on the frame 1, and the movable plate 14 is provided with guide holes corresponding to the plurality of guide rods 15. The moving direction of the movable plate 14 on the frame 1 is limited by the cooperation between the guide rods 15 and the guide holes, so that the movable plate 14 is prevented from deviating from the preset direction when moving and the movable plate 14 is prevented from tilting, and the positioning groove 85 is ensured to be aligned with the positioning pin 73 during the movement of the driving rod 82, which is conducive to improving the reliability of the weighing and feeding device for coating production.

[0032] Please combine Figure 1 and Figure 2 The feed hopper 2 is provided with a mounting plate 21 and a stirring assembly 22 is provided on the mounting plate 21. The stirring assembly 22 includes a third motor 23 and a stirring rod 24 provided at the output end of the third motor 23. The stirring rod 24 extends into the feed hopper 2 and a plurality of second stirring paddles 25 are provided at intervals on the outer peripheral wall of the stirring rod 24. The stirring assembly 22 is provided on the feed hopper 2 to stir the raw materials poured into the feed hopper 2. When the stirring rod 24 rotates under the drive of the third motor 23, the second stirring paddles 25 act on the raw materials in the feed hopper 2 to break up the agglomerated raw materials to prevent the agglomerated raw materials from blocking the feed port 33 of the conveying cylinder, and at the same time improve the uniformity of the raw materials, which is convenient for use in subsequent processing.

[0033] like Figure 1 and Figure 2 As shown, the weighing bin 4 is located directly below the second cylinder 32 and mounting brackets 41 are respectively provided on opposite sides of the weighing bin 4. Two weighing sensors 16 are arranged at intervals on the frame 1. The two weighing sensors 16 are respectively located on opposite sides of the weighing bin 4 and the two mounting brackets 41 are respectively in one-to-one contact with the two weighing sensors 16. The weight change of the weighing bin 4 is monitored by the weighing sensor 16, so as to calculate the weight of the raw materials falling into the weighing bin 4. The mounting brackets 41 corresponding to the two weighing sensors 16 are respectively provided on both sides of the weighing bin 4, so that the weighing bin 4 and the weighing sensor 16 are stably matched, and the data measured by the weighing sensor 16 is ensured to be reliable.

[0034] In detail, the receiving bin 5 is located directly below the weighing bin 4 and a discharge port 42 is provided at one end of the weighing bin 4 close to the receiving bin 5, and a solenoid valve 43 is provided at the opening of the discharge port 42. When the weighing sensor 16 detects that the raw materials falling into the weighing bin 4 reach a preset value, the solenoid valve 43 opens the discharge port 42, so that the raw materials in the weighing bin 4 can pass through the discharge port 42 and enter the receiving bin 5, and a conveying device such as an auger can be used to convey the raw materials in the receiving bin 5 to the processing equipment. When the weighing sensor 16 detects that the reduced amount in the weighing bin 4 is consistent with the preset value, the solenoid valve 43 closes and seals the discharge port 42. At this time, raw materials can continue to be added to the weighing bin 4 for weighing, so that the weighing and feeding device for coating production can operate continuously and stably.

[0035] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.

Claims

1. A weighing and feeding device for coating production, comprising a frame, on which a feed hopper, a feeding cylinder, a weighing bin and a receiving bin are sequentially connected, characterized in that: The feeding cylinder includes a first cylinder body and a second cylinder body that are connected to each other, the axial direction of the first cylinder body is horizontal and the axial direction of the second cylinder body is vertical, a feed port connected to a feed hopper is provided at one end of the first cylinder body away from the second cylinder body, a conveying assembly is also provided on the first cylinder body, and the conveying assembly transports the material in the first cylinder body from the feed port to the second cylinder body, a side of the second cylinder body close to the weighing bin is provided with a plurality of drop openings at intervals along the circumference of the second cylinder body, and the drop openings are respectively aligned with the weighing bin, a rotatable baffle is also provided on the second cylinder body, and a first driving assembly connected to the baffle for transmission is provided on the frame, the baffle covers a side of the second cylinder body close to the weighing bin, a through hole penetrating the baffle is provided on the baffle, and when the baffle rotates driven by the first driving assembly, the through hole is connected to or staggered with the drop opening, and when the through hole is connected to the drop opening, an overlapping area of ​​the through hole and the drop opening increases or decreases with the rotation of the baffle.

2. A weighing and feeding device for coating production as claimed in claim 1, characterized in that: The conveying assembly includes a first motor and a conveying rod arranged at the output end of the first motor, the conveying rod extends into the first cylinder and is coaxially arranged with the first cylinder, and a spiral blade is provided on the portion of the conveying rod located in the first cylinder.

3. A weighing and feeding device for coating production as claimed in claim 1, characterized in that: The frame is also provided with a limit sleeve, which covers one end of the second cylinder close to the weighing bin and is provided with a slot connected to the blanking port. A side of the limit sleeve close to the second cylinder is provided with a limit groove, and the baffle can be rotatably arranged in the limit groove.

4. A weighing and feeding device for coating production as claimed in claim 1, characterized in that: The first driving assembly includes a second motor and a driving rod arranged at the output end of the second motor, the driving rod extends into the second cylinder, a vertical transmission rod is provided on the baffle, and one end of the transmission rod away from the baffle extends into the second cylinder and cooperates with the driving rod.

5. A weighing and feeding device for coating production as claimed in claim 4, characterized in that: The frame is also provided with a liftable movable plate and a second driving assembly connected to the movable plate in transmission, the second motor is arranged on the movable plate and the driving rod is provided with a sleeve portion for accommodating part of the driving rod, a plurality of first stirring paddles are arranged at intervals on the outer peripheral wall of the sleeve portion, a locating pin is provided at one end of the driving rod away from the baffle and a locating groove matching the locating pin is provided in the sleeve portion.

6. A weighing and feeding device for coating production as claimed in claim 5, characterized in that: The second driving assembly includes a cylinder and a telescopic rod arranged at the output end of the cylinder, the moving direction of the telescopic rod is consistent with the vertical direction, and one end of the telescopic rod away from the cylinder is fixedly connected to the movable plate.

7. A weighing and feeding device for coating production as claimed in claim 5, characterized in that: A plurality of guide rods are arranged at intervals on the frame and the guide rods are respectively arranged vertically on the frame, and a guide hole corresponding to and cooperating with the plurality of guide rods is arranged in the middle of the movable plate.

8. A weighing and feeding device for coating production as claimed in claim 1, characterized in that: The feed hopper is provided with a mounting plate and the mounting plate is provided with a stirring assembly, the stirring assembly includes a third motor and a stirring rod arranged at the output end of the third motor, the stirring rod extends into the feed hopper and a plurality of second stirring paddles are spaced apart on the outer peripheral wall of the stirring rod.

9. A weighing and feeding device for coating production as claimed in claim 1, characterized in that: The weighing bin is located directly below the second cylinder and mounting brackets are respectively provided on opposite sides of the weighing bin. Two weighing sensors are spaced apart on the frame. The two weighing sensors are respectively located on opposite sides of the weighing bin and the two mounting brackets are respectively abutted against the two weighing sensors in a one-to-one correspondence.

10. A weighing and feeding device for coating production as claimed in claim 1, characterized in that: The material receiving bin is located directly below the weighing bin and a material discharge port is provided at one end of the weighing bin close to the material receiving bin, and a solenoid valve is provided at the opening of the material discharge port.

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