Automatic polyolefin mixing and weighing machine

Abstract

The utility model discloses an automatic polyolefin mixing and weighing machine which is characterized in that a movable cavity is arranged on a rack, a weighing and stirring assembly is arranged in the movable cavity, a main material blanking assembly and a secondary material blanking assembly are arranged above the weighing and stirring assembly at an interval, and a discharging assembly is arranged below the weighing and stirring assembly at an interval; an electric control box is fixedly attached to the outer side of the movable cavity, and the electric control box is bidirectionally and electrically connected with the weighing and stirring assembly, the main material discharging assembly, the secondary material discharging assembly and the discharging assembly. According to the utility model, the materials needing to be mixed can be automatically blended according to the formula selected by the upper computer, manual intervention is reduced, the accuracy of raw material supply is ensured, the product quality risk is reduced, the matching consistency of each production raw material is ensured through full-automatic blending and mixing, and the production quality of subsequent products is improved.

Description

Technical Field

[0001] This utility model relates to the field of mixing equipment technology, specifically to an automatic polyolefin mixing and weighing machine. Background Technology

[0002] Currently, the raw materials used in the extrusion of polyolefin pipes are polyolefin resin (PE, PPR) and color masterbatch blended in a certain proportion. The common mixing method in the industry is that employees manually break the bags according to the formula, calculate the weight of resin to be added based on the theoretical weight of each bag and the number of bags, weigh the required weight of color masterbatch, and then mix them in a mixing pot. After the specified time is reached, the mixed material is transferred to the storage hopper. The data is recorded manually by employees, who cannot leave their posts. This results in high labor intensity, significant waste of manpower, and low work efficiency. In extreme cases, data deviation may occur due to negligence.

[0003] Therefore, designing an automatic polyolefin mixing and weighing machine to improve the proportioning accuracy, solve the problem of inconsistent proportioning requiring manual mixing, and reduce the labor intensity of employees has become the direction for further improvement. Utility Model Content

[0004] To solve the above-mentioned technical problems, this utility model provides an automatic polyolefin mixing and weighing machine, including a frame, a movable cavity, a weighing and stirring assembly, a main material feeding assembly, a secondary material feeding assembly, a discharge assembly, and an electrical control box. The movable cavity is provided on the frame, and the weighing and stirring assembly is provided inside the movable cavity. The main material feeding assembly and the secondary material feeding assembly are spaced apart above the weighing and stirring assembly, and the discharge assembly is spaced apart below the weighing and stirring assembly. The electrical control box is fixedly attached to the outside of the movable cavity, and the electrical control box is bidirectionally electrically connected to the weighing and stirring assembly, the main material feeding assembly, the secondary material feeding assembly, and the discharge assembly.

[0005] Preferably, the weighing and mixing assembly includes a weighing frame, a weighing hopper, a weighing discharge gate, a weighing motor, a mixing blade assembly, a mixing motor, a mixing discharge gate, and a gate opening cylinder. The weighing frame is fixedly installed inside the movable cavity. The upper sides of the weighing frame are respectively connected to the main material discharge assembly and the secondary material discharge assembly. A weighing hopper is fixedly installed at the lower end of the weighing frame. A rotatable weighing discharge gate is located at the lower end of the weighing hopper. One side of the weighing discharge gate is connected to the output end of the mixing motor. An inclined mixing blade assembly is located below the weighing discharge gate. One side of the mixing blade assembly is connected to the output end of the mixing motor. The mixing motor is fixedly installed outside the movable cavity. A mixing discharge gate is located below the mixing blade assembly, and a gate opening cylinder is installed on the mixing discharge gate.

[0006] Preferably, the stirring blade assembly includes an integrally formed hollow shaft, blades, and baffles. The output end of the stirring motor is adapted and connected to the hollow shaft for transmission. Four sets of blades are evenly arranged on the outer circumference of the hollow shaft. The vertical angle between the opposing blades is 60°. The ends of adjacent blades are connected by baffles, and the adjacent baffles are staggered.

[0007] Preferably, the main material feeding assembly includes a main suction machine, a main discharge hopper, and a material blocking assembly. The main discharge hopper is fixedly provided on one side of the upper end of the movable cavity. The main suction machine is provided at the upper end of the main discharge hopper. The material blocking assembly is provided laterally at the lower end of the main discharge hopper. The material blocking assembly is used to clear blockages in the material feeding of the main discharge hopper. The lower end of the main discharge hopper is connected to the interior of the weighing hopper.

[0008] Preferably, the secondary material feeding assembly includes a secondary suction machine and a screw discharge hopper. Two secondary suction machines are arranged side by side on one side of the main suction machine. The lower end of the secondary suction machine is provided with a screw discharge hopper at an angle. The bottom of the screw discharge hopper is connected to the inside of the weighing hopper.

[0009] Preferably, the material blocking assembly includes a mounting plate, a main motor, a glass pusher plate, a clamping block, and a pressing block. The mounting plate is fixedly mounted on one side of the upper end of the movable cavity, and the main motor is fixedly mounted on the outside of the mounting plate. The output end of the main motor is fixedly connected to the glass pusher plate through a Y-type connector. The glass pusher plate is movably inserted into the clamping block. The upper end of the clamping block is sealed to the bottom of the main discharge hopper, and the lower end of the clamping block is threadedly fixed to the pressing block. The pressing block is coaxially arranged with and can communicate with the bottom of the main discharge hopper.

[0010] Preferably, the glass pusher plate is provided with a material discharge hole, which is larger than or equal to the bottom of the main discharge hopper; the glass pusher plate is provided with downwardly bent limiting blocks on both sides.

[0011] Preferably, the blades are bent.

[0012] Preferably, the discharge assembly includes a discharge drawer and a main discharge hopper, the discharge drawer is slidably connected to the inner side of the frame, and the main discharge hopper is detachably installed at the lower end of the discharge drawer.

[0013] Preferably, the main discharge hopper, the secondary discharge hopper, and the total discharge hopper are all provided with observation windows.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] (1) This utility model features a movable cavity on a frame, within which a weighing and stirring assembly is installed. Above the weighing and stirring assembly are a main material feeding assembly and a secondary material feeding assembly, and below the weighing and stirring assembly are a discharge assembly. An electrical control box is fixedly attached to the outside of the movable cavity, and the electrical control box is bidirectionally electrically connected to the weighing and stirring assembly, the main material feeding assembly, the secondary material feeding assembly, and the discharge assembly. This utility model can automatically mix the materials to be mixed according to the formula selected by the host computer, reducing manual intervention, ensuring the accuracy of raw material supply, reducing product quality risks, and ensuring the consistency of the proportions of each production raw material through fully automatic batching and mixing, thereby improving the production quality of subsequent products, reducing the labor intensity of employees, and increasing the efficiency of mixing.

[0016] (2) This utility model uses an integrally molded stirring blade assembly. The output end of the stirring motor is adapted to the hollow shaft for transmission. Four sets of blades are evenly arranged on the outer circumference of the hollow shaft. The vertical angle between the opposite blades is 60°. The ends of adjacent blades are connected by baffles, and the adjacent baffles are staggered. This reduces the overall assembly time. The hollow shaft design reduces the weight of rotating parts while ensuring torque transmission, reduces the energy consumption of the stirring motor, reduces the moment of inertia by about 15%, and improves heat dissipation efficiency. The four sets of blades are arranged in a cross pattern to form a multi-dimensional spiral flow field. Combined with the staggered baffle design, it reduces material entanglement and can effectively increase the mixing rate of materials. The asymmetric flow channel formed by the staggered baffles can effectively break the symmetrical vortex, generating 15-20% more complete turbulent diffusion during the mixing process and shortening the mixing time by about 25%. The guide ridges formed by the baffles can improve the axial conveying efficiency of materials by 40%, effectively solving the material deposition problem of traditional impellers.

[0017] (3) This utility model achieves a batching accuracy of ±0.5% through dynamic flow adjustment of the baffle assembly in conjunction with the weighing hopper, making it suitable for high-precision batching scenarios. The quick-release connection between the main discharge hopper and the movable cavity facilitates rapid maintenance by engineers, shortens the replacement time of individual components, and reduces downtime losses. The glass pusher is driven by the main motor, and the Y-type connector eliminates transmission gaps. Combined with the guide block mechanism, it can achieve 0-100% linear opening adjustment, improving the resolution of flow control. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0019] Figure 2 This is a schematic diagram of the internal structure of this utility model.

[0020] Figure 3 This is a cross-sectional view of the present invention.

[0021] Figure 4 This is one of the schematic diagrams of the material blocking component of this utility model.

[0022] Figure 5 This is the second schematic diagram of the material blocking component of this utility model.

[0023] Figure 6 This is a schematic diagram of the stirring blade assembly of this utility model.

[0024] Figure 7 For the present utility model Figure 6 Side view. Detailed Implementation

[0025] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0026] like Figures 1 to 7 As shown, an automatic polyolefin mixing and weighing machine includes a frame 1, a movable cavity 2, an electrical control box 3, a weighing frame 4, a weighing hopper 5, a weighing and discharging gate 6, a weighing motor 7, a mixing blade assembly 8, a mixing motor 9, a mixing and discharging gate 10, a gate opening cylinder 11, a hollow shaft 12, blades 13, a stop block 14, a main suction machine 15, a main discharge hopper 16, a material blocking assembly 17, a secondary suction machine 18, a screw discharge hopper 19, a mounting plate 20, a main motor 21, a glass push plate 22, a clamping block 23, a pressing block 24, a Y-type connector 25, a discharge hole 26, a limit block 27, a discharge drawer 28, a main discharge hopper 29, and an observation window 30.

[0027] In the description of this utility model, unless otherwise stated, "a plurality of" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," "front end," "rear end," "head," "tail," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. In addition, the terms "first," "second," "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0028] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0029] like Figures 1 to 7As shown, a movable cavity 2 is provided on the frame 1, and a weighing and stirring assembly is provided inside the movable cavity 2. A main material feeding assembly and a secondary material feeding assembly are provided at intervals above the weighing and stirring assembly, and a discharge assembly is provided at intervals below the weighing and stirring assembly. An electrical control box 3 is fixedly attached to the outside of the movable cavity 2, and the electrical control box 3 is bidirectionally electrically connected to the weighing and stirring assembly, the main material feeding assembly, the secondary material feeding assembly, and the discharge assembly.

[0030] The weighing and mixing assembly includes a weighing frame 4, a weighing hopper 5, a weighing discharge gate 6, a weighing motor 7, a mixing blade assembly 8, a mixing motor 9, a mixing discharge gate 10, and an opening cylinder 11. The weighing frame 4 is fixedly installed inside the movable cavity 2. The upper two sides of the weighing frame 4 are respectively connected to the main material discharge assembly and the secondary material discharge assembly. The weighing hopper 5 is fixedly installed at the lower end of the weighing frame 4. The lower end of the weighing hopper 5 is equipped with a rotatable weighing discharge gate 6. One side of the weighing discharge gate 6 is connected to the output end of the mixing motor 9. Below the weighing discharge gate 6 is an inclined mixing blade assembly 8. One side of the mixing blade assembly 8 is connected to the output end of the mixing motor 9. The mixing motor 9 is fixed on the outside of the movable cavity 2. Below the mixing blade assembly 8 is the mixing discharge gate 10. The opening cylinder 11 is installed on the mixing discharge gate 10. Compared to the vertical discharge components installed inside the discharge hopper in the prior art, the horizontally arranged baffle assembly 17 in this embodiment provides more accurate material discharge, is less prone to clogging the discharge port, and is conveniently located on the outside of the movable cavity 2 for maintenance.

[0031] Specifically, in this embodiment, the stirring blade assembly 8 includes an integrally formed hollow shaft 12, blades 13, and baffles 14. The output end of the stirring motor 9 is adapted and connected to the hollow shaft 12 for transmission. Four sets of blades 13 are evenly arranged on the outer circumference of the hollow shaft 12, and the blades 13 are bent. The vertical angle between opposing blades 13 is 60°, and the ends of adjacent blades 13 are connected by baffles 14, which are staggered. The stirring blade assembly 8 is an integrally formed design, reducing the overall assembly time. The hollow shaft 12 design reduces the weight of rotating parts while ensuring torque transmission, reducing the energy consumption of the stirring motor 9, reducing the moment of inertia by about 15%, and improving heat dissipation efficiency. The four sets of blades 13 are arranged in a cross pattern, forming a multi-dimensional spiral flow field. Combined with the staggered baffle design, this reduces material entanglement and effectively increases the mixing rate of materials. The asymmetric flow channel formed by the staggered baffle 14 can effectively break the symmetric vortex, generating 15-20% more complete turbulent diffusion during the mixing process and shortening the mixing time by about 25%. The guide ridge formed by the baffle 14 can improve the axial conveying efficiency of materials by 40%, effectively solving the material deposition problem of traditional impellers.

[0032] The main material feeding assembly includes a main suction machine 15, a main discharge hopper 16, and a baffle assembly 17. The main discharge hopper 16 is fixedly installed on one side of the upper end of the movable cavity 2. The main suction machine 15 is installed on the upper end of the main discharge hopper 16. The baffle assembly 17 is installed horizontally at the lower end of the main discharge hopper 16. The baffle assembly 17 is used to clear blockages in the discharge of the main discharge hopper 16. The lower end of the main discharge hopper 16 is connected to the interior of the weighing hopper 5. The secondary material feeding assembly includes a secondary suction machine 18 and a screw discharge hopper 19. Two secondary suction machines 18 are arranged side by side on one side of the main suction machine 15. The screw discharge hopper 19 is installed obliquely at the lower end of the secondary suction machine 18. The bottom of the screw discharge hopper 19 is connected to the interior of the weighing hopper 5.

[0033] like Figures 4 to 5 As shown, the baffle assembly 17 includes a mounting plate 20, a main motor 21, a glass pusher plate 22, a locking block 23, and a pressure block 24. The mounting plate 20 is fixedly mounted on one side of the upper end of the movable cavity 2, and the main motor 21 is fixedly mounted on the outer side of the mounting plate 20. The output end of the main motor 21 is fixedly connected to the glass pusher plate 22 via a Y-type connector 25. The glass pusher plate 22 is movably inserted into the locking block 23. The upper end of the locking block 23 is sealed to the bottom of the main discharge hopper 16, and the lower end of the locking block 23 is threadedly fixed to the pressure block 24. The pressure block 24 is coaxially arranged with and can communicate with the bottom of the main discharge hopper 16. Through the dynamic flow adjustment of the baffle assembly 17, in conjunction with the weighing hopper 5, a batching accuracy of ±0.5% can be achieved, suitable for high-precision batching scenarios. The quick-release connection between the main discharge hopper 16 and the movable cavity 2 facilitates rapid maintenance by engineers, shortens the replacement time of individual components, and reduces downtime losses. The glass pusher plate 22 is driven by the main motor 21. The Y-type connector 25 eliminates transmission gaps. With the guide mechanism of the locking block 23, it can achieve 0-100% linear opening adjustment and improve the flow control resolution.

[0034] The glass pusher plate 22 is provided with a material discharge hole 26, which is larger than or equal to the bottom of the main discharge hopper 16; the glass pusher plate 22 is provided with downwardly bent limiting blocks 27 on both sides. The downwardly bent limiting blocks 27 on both sides of the glass pusher plate 22 effectively limit the working stroke of the glass pusher plate 22 and can adapt to different materials.

[0035] The discharge assembly includes a discharge drawer 28 and a main discharge hopper 29. The discharge drawer 28 is slidably connected to the inner side of the frame 1, and the main discharge hopper 29 is detachably installed at the lower end of the discharge drawer 28.

[0036] The main discharge hopper 16, the secondary discharge hopper and the total discharge hopper 29 are all equipped with observation windows 30 to support real-time observation of the material blockage status.

[0037] The working principle of this utility model is as follows:

[0038] The host computer obtains the formula number for this production and transmits the relevant material data to the electrical control box 3. The main suction machine 15 and the secondary suction machine 18 respectively suck up materials from the external storage tank. Based on the formula number for this production and the preset total weight, the weight required for different materials is calculated, and the main materials stored in the main suction machine 15 and the secondary suction machine 18 are weighed in real time.

[0039] When the material sucked up in the main discharge hopper 16 and the screw discharge hopper 19 reaches the weight within the preset error, the feeding will stop.

[0040] The electrical control box 3 saves the material weight and total weight data in the main discharge hopper 16 and the screw discharge hopper 19 and sends them back to the host computer. The host computer stores the data in the database for data comparison and traceability.

[0041] The main motor 21 retracts, causing the material discharge hole 26 on the glass push plate 22 to align with the lower end of the main discharge hopper 16. The material in the main suction machine 15 falls smoothly into the weighing hopper 5, and the weight of the remaining material in the main discharge hopper 16 is weighed in real time. At the same time, the screw discharge hopper 19 also starts to work, and the material in the screw discharge hopper 19 also falls into the weighing hopper 5 synchronously. The weight of the remaining material in the screw discharge hopper 19 is weighed in real time, and the weight data is transmitted to the electrical control box 3.

[0042] The material in the symmetrical weighing hopper 5 is weighed, the weighing motor 7 is turned on, and the weighing discharge gate 6 drives the material to fall into the mixing blade assembly 8 for mixing.

[0043] The mixed material falls through the mixing and feeding gate 10 into the discharge drawer 28 and then into the main discharge hopper 29 for the next process.

[0044] This invention can automatically mix the materials that need to be mixed according to the formula selected by the host computer, reduce manual intervention, ensure the accuracy of raw material supply, reduce product quality risks, ensure the consistency of the proportion of each raw material through fully automatic batching and mixing, improve the production quality of subsequent products, reduce the labor intensity of employees, and improve the efficiency of mixing.

[0045] In this embodiment, weighing sensors and material level sensors are respectively installed at the relative positions of the weighing and stirring assembly, the main material feeding assembly, the secondary material feeding assembly, and the discharge assembly. These sensors are commonly available on the market and have not been modified in this embodiment, so they are not described in detail.

[0046] The above embodiments are merely preferred embodiments of this utility model and should not be construed as limiting the scope of this utility model. Therefore, any modifications, equivalent changes, or improvements made in accordance with the claims of this utility model shall still fall within the scope of this utility model.

Claims

1. A polyolefin automatic compounding and weighing machine, characterized by: The assembly includes a frame (1), a movable cavity (2), a weighing and mixing component, a main material feeding component, a secondary material feeding component, a discharge component, and an electrical control box (3). The frame (1) is provided with a movable cavity (2), and the movable cavity (2) is provided with a weighing and mixing component. The main material feeding component and the secondary material feeding component are spaced apart above the weighing and mixing component, and the discharge component is spaced apart below the weighing and mixing component. The electrical control box (3) is fixedly attached to the outside of the movable cavity (2), and the electrical control box (3) is bidirectionally electrically connected to the weighing and mixing component, the main material feeding component, the secondary material feeding component, and the discharge component. The weighing and mixing component includes a weighing frame (4), a weighing hopper (5), a weighing and discharging gate (6), a weighing motor (7), a mixing blade assembly (8), a mixing motor (9), and a mixing and discharging gate. (10) and door opening cylinder (11), a weighing frame (4) is fixedly provided in the movable cavity (2), the upper sides of the weighing frame (4) are respectively connected to the main material feeding component and the secondary material feeding component, a weighing hopper (5) is fixedly provided at the lower end of the weighing frame (4), a rotatable weighing and feeding door (6) is provided at the lower end of the weighing hopper (5), one side of the weighing and feeding door (6) is connected to the output end of the stirring motor (9); an inclined stirring blade group (8) is provided below the weighing and feeding door (6), one side of the stirring blade group (8) is connected to the output end of the stirring motor (9), the stirring motor (9) is fixed on the outside of the movable cavity (2); a stirring feeding door (10) is provided below the stirring blade group (8), and a door opening cylinder (11) is provided on the stirring feeding door (10).

2. The polyolefin automatic mixing and weighing machine according to claim 1, characterized in that: The stirring blade assembly (8) includes an integrally formed hollow shaft (12), blades (13) and a stop (14). The output end of the stirring motor (9) is adapted to be connected to the hollow shaft (12) for transmission. Four sets of blades (13) are evenly arranged on the outer circumference of the hollow shaft (12). The vertical angle between the opposite blades (13) is 60°. The ends of adjacent blades (13) are connected by a stop (14). The adjacent stops (14) are staggered.

3. The polyolefin automatic batching scale of claim 2, wherein: The main material feeding assembly includes a main suction machine (15), a main discharge hopper (16), and a baffle assembly (17). The main discharge hopper (16) is fixedly provided on one side of the upper end of the movable cavity (2). The main suction machine (15) is provided at the upper end of the main discharge hopper (16). The baffle assembly (17) is provided laterally at the lower end of the main discharge hopper (16). The baffle assembly (17) is used to clear the blockage of the main discharge hopper (16) during material feeding. The lower end of the main discharge hopper (16) is connected to the inside of the weighing hopper (5).

4. The polyolefin automatic batching scale of claim 3, wherein: The secondary material feeding assembly includes a secondary suction machine (18) and a screw discharge hopper (19). Two secondary suction machines (18) are arranged side by side on one side of the main suction machine (15). The lower end of the secondary suction machine (18) is provided with a screw discharge hopper (19). The bottom of the screw discharge hopper (19) is connected to the inside of the weighing hopper (5).

5. The polyolefin automatic batching scale of claim 4, wherein: The baffle assembly (17) includes a mounting plate (20), a main motor (21), a glass pusher plate (22), a locking block (23), and a pressure block (24). The mounting plate (20) is fixedly installed on one side of the upper end of the movable cavity (2). The main motor (21) is fixedly installed on the outside of the mounting plate (20). The output end of the main motor (21) is fixedly connected to the glass pusher plate (22) through a Y-type connector (25). The glass pusher plate (22) is movably inserted into the locking block (23). The upper end of the locking block (23) is sealed to the bottom of the main discharge hopper (16). The lower end of the locking block (23) is threadedly fixed to the pressure block (24). The pressure block (24) is coaxially arranged with the bottom of the main discharge hopper (16) and can communicate with it.

6. The polyolefin automatic batching scale of claim 5, wherein: The glass pusher plate (22) is provided with a material discharge hole (26), which is greater than or equal to the bottom of the main discharge hopper (16); the glass pusher plate (22) is provided with downward bending limiting blocks (27) on both sides.

7. The polyolefin automatic batching scale of claim 3, wherein: The blade (13) is bent.

8. The polyolefin automatic batching scale of claim 7, wherein: The discharge assembly includes a discharge drawer (28) and a main discharge hopper (29). The discharge drawer (28) is slidably connected to the inner side of the frame (1), and the main discharge hopper (29) is detachably installed at the lower end of the discharge drawer (28).

9. The polyolefin automatic batching scale of claim 8, wherein: The main discharge hopper (16), the secondary discharge hopper and the total discharge hopper (29) are all provided with observation windows (30).

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