Plastic raw material mixing device with screening mechanism

Abstract

The utility model belongs to the plastic processing technical field discloses a kind of plastic raw material mixing devices with screening mechanism, including device main body and lower end fixed support leg, the device main body upper end connection feed inlet, device main body lower end connection discharge valve.The plastic raw material mixing device with screening mechanism, device integrates screening frame in the upper end inside mixing device, after raw material is input from feed inlet, first, impurity and unqualified particle size particle are filtered by screening frame, the inner wall of screening frame is designed to cooperate with impurity discharge groove, and the impurities and oversized particles retained can be quickly discharged, to avoid its into subsequent mixing link, simultaneously, when power motor drives transmission shaft to rotate, not only the qualified raw material after screening is annularly stirred by transmission connecting rod and stirring plate, but also the raw material in funnel-shaped area at the bottom of device is specifically stirred by stirring paddle at lower end, to eliminate stirring dead angle, effectively avoid the finished product defect caused by raw material impurity or uneven mixing.

Description

Technical Field

[0001] This utility model relates to the field of plastic processing technology, specifically to a plastic raw material mixing device with a screening mechanism. Background Technology

[0002] In the plastics processing industry, the uniformity and purity of granular plastic raw materials are the core prerequisites affecting the quality of the final plastic products. Different types, colors, or properties of plastic granules need to be mixed in precise proportions. If the mixing is uneven, it will lead to problems such as color difference, strength fluctuation, and molding defects in the finished product. At the same time, impurities or particles that do not meet the particle size requirements are easily mixed into the raw materials during storage and transportation. If such substances are directly introduced into the mixing process, they will not only destroy the stability of the mixing system, but may also damage the subsequent molding equipment, increasing the risk of production failure and equipment maintenance costs.

[0003] An existing Chinese patent application, CN202421336304.0, describes a raw material mixing and feeding device for PET plastic bottles. The device includes a raw material reaction vessel and a mixing assembly. The mixing assembly is located in the middle of the raw material reaction vessel and includes a drive motor, a stirring rod mechanism, a protective cover, and a fixing rod. The bottom of the drive motor is fixedly installed in the middle of the cover plate. There are four sets of stirring rod mechanisms, symmetrically arranged around the protective cover. One set of stirring rod mechanisms is fixedly installed near the top of the drive motor and at the output end of the drive motor. One end of the fixing rod is fixedly installed on the inner surface of the raw material reaction vessel, and the other end is fixedly installed on the outer surface of the protective cover.

[0004] However, while existing plastic raw material mixing devices can achieve uniform and efficient stirring, they do not have a screening structure. Impurities or materials with inconsistent particle sizes in the plastic raw materials need to be pre-treated, resulting in lower overall processing efficiency and more cumbersome operation.

[0005] Therefore, we propose a plastic raw material mixing device with a screening mechanism to solve the problems mentioned above. Utility Model Content

[0006] The purpose of this invention is to provide a plastic raw material mixing device with a screening mechanism, in order to solve the problem that although the existing plastic raw material mixing devices mentioned in the background art can achieve uniform and efficient stirring, they do not have a screening structure, and impurities or materials with inconsistent particle sizes in the plastic raw materials need to be pre-treated, resulting in low overall processing efficiency and more cumbersome operation.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a plastic raw material mixing device with a screening mechanism, comprising a main body and a support leg fixed at the lower end; an inlet is connected to the upper end of the main body, and a discharge valve is connected to the lower end of the main body. A screening frame is provided at the upper part of the main body of the device, and a waste discharge trough is provided on the right side of the screening frame; The main body of the device has a drive shaft running through it. The upper end of the drive shaft is connected to a power motor, the lower end of the drive shaft is connected to a transmission rod, and the end of the transmission rod is connected to a stirring plate. The screening frame has a transmission groove at its lower end, the transmission shaft is connected to a transmission rod at its upper end, and a guide block is fixed at the end of the transmission rod.

[0008] Preferably, the drive shaft is rotatably connected to the main body of the device and the screening frame, the lower end of the power motor is fixed to the upper end of the main body of the device, and the transmission connecting rod and the stirring plate are arranged in a ring array around the drive shaft.

[0009] Using the above technical solution, the transmission shaft, transmission rod and stirring plate can be driven to rotate synchronously by a power motor. During the rotation of the transmission rod and stirring plate, the screened plastic particles inside the main body of the device can be stirred and mixed.

[0010] Preferably, the bottom of the main body of the device is designed in the shape of a funnel, the lower end of the drive shaft is fixed with a stirring plate, the lower end of the stirring plate is in contact with the inner wall of the main body of the device, and the shape of the stirring plate matches the bottom of the main body of the device.

[0011] Using the above technical solution, the stirring plate can be driven to rotate synchronously through the transmission shaft. When the stirring plate rotates, it can stir the raw materials at the bottom of the device body, reduce dead corners generated during stirring, and reduce residues during feeding, preventing raw materials from adhering to the bottom of the device body.

[0012] Preferably, the inner wall of the screening frame is inclined, and a hole is opened on the right side of the screening frame, and the hole is connected to the impurity discharge trough.

[0013] Using the above technical solution, the screening frame can be used to screen plastic granules during feeding. The inclined design of the screening frame, combined with the impurity discharge trough, allows the impurities and granules that do not meet the particle size requirements after screening to be discharged into the impurity discharge trough.

[0014] Preferably, the transmission rod and guide block are arranged in a circular array around the transmission shaft, the transmission grooves are arranged in a circular array around the center of the screening frame, and the transmission grooves are arranged in a wave-like pattern, with the upper end of the guide block adapted to the transmission groove.

[0015] By adopting the above technical solution, the guide block can be rotated with the transmission shaft through the transmission rod. When the guide block rotates, it cooperates with the transmission groove to drive the screening frame to move up and down, thereby causing the screening frame to shake up and down, improving the screening efficiency of the screening frame for plastic particles.

[0016] Preferably, a guide slider is fixed to the outer wall of the screening frame, and a guide groove is provided on the inner wall of the main body of the device. The guide groove is slidably connected to the guide slider. A guide shaft passes through the middle of the guide slider. Both ends of the guide shaft are fixed to the inner wall of the guide groove. A reset spring is sleeved on the upper end of the guide shaft, and the upper and lower ends of the reset spring are in contact with the guide groove and the guide slider, respectively.

[0017] By adopting the above technical solution, the stability of the screening frame during its up-and-down movement is maintained through the cooperation of the guide groove and the guide slider. At the same time, the speed of the screening frame when it is reset downwards can be increased by the cooperation of the guide shaft and the reset spring, thus avoiding jamming during the downward reset.

[0018] Compared with the prior art, the beneficial effects of this utility model are: the plastic raw material mixing device with screening mechanism; 1. The device integrates the screening frame into the upper part of the mixing device. After the raw material is fed into the inlet, it first passes through the screening frame to filter impurities and unqualified particles. The inclined design of the inner wall of the screening frame, combined with the impurity discharge trough, can quickly discharge the trapped impurities and oversized particles, preventing them from entering the subsequent mixing stage. At the same time, when the power motor drives the transmission shaft to rotate, it not only performs ring stirring of the qualified raw material after screening through the transmission linkage and stirring plate, but also performs targeted stirring of the raw material in the funnel-shaped area at the bottom of the device through the stirring baffle at the lower end, eliminating the stirring dead corners and effectively avoiding finished product defects caused by raw material impurities or uneven mixing. This device eliminates the raw material transfer link, reduces the risk of secondary pollution and particle stratification during the transfer process, and allows the qualified raw material after screening to directly enter the mixing process, greatly improving the continuity of raw material processing and the stability of final quality. 2. The device can synchronously drive the mixing and sieving vibration structures with only one power motor. When the drive shaft rotates, the lower end directly drives the transmission connecting rod, stirring plate, and stirring baffle to complete the mixing. The upper end, through the transmission rod, guide block, and wave-shaped transmission groove at the lower end of the sieve frame, converts the rotational motion into the up-and-down vibration of the sieve frame. At the same time, the combination of guide slider, guide shaft, and return spring ensures the stability of the sieve frame during vibration, accelerates its return speed, and avoids jamming. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic cross-sectional view of the main body of the device of this utility model; Figure 3This is a schematic diagram of the screening frame and transmission groove structure of this utility model; Figure 4 This is a schematic diagram of the transmission connecting rod and stirring plate structure of this utility model; Figure 5 This is a schematic diagram of the guide shaft and reset spring structure of this utility model.

[0020] In the diagram: 1. Main body of the device; 2. Support leg; 3. Feed inlet; 4. Discharge valve; 5. Screening frame; 6. Impurity discharge trough; 7. Drive shaft; 8. Power motor; 9. Transmission connecting rod; 10. Stirring plate; 11. Stirring baffle; 12. Transmission groove; 13. Transmission rod; 14. Guide block; 15. Guide groove; 16. Guide shaft; 17. Return spring; 18. Guide slider. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] Please see Figure 1-5 This utility model provides a technical solution: a plastic raw material mixing device with a screening mechanism, including a main body 1 and support legs 2 fixed at the lower end; a feed inlet 3 connected to the upper end of the main body 1; a discharge valve 4 connected to the lower end of the main body 1; a screening frame 5 installed at the upper end inside the main body 1; and a waste discharge trough 6 installed on the right side of the screening frame 5; the inner wall of the screening frame 5 is inclined; a hole is opened on the right side of the screening frame 5, and the hole communicates with the waste discharge trough 6; the main body 1 is supported and installed using multiple sets of support legs 2, so that the main body 1 is suspended in the air. The device body 1 is equipped with a feed inlet 3 at the upper end, through which plastic granules are fed. After entering the device body 1 through the feed inlet 3, the plastic granules fall into the screening frame 5. The screening frame 5 screens the plastic granules to remove impurities and larger particles. The screened plastic granules fall below the device body 1 for subsequent stirring and mixing. Due to the inclined design of the screening frame 5, the impurities and larger plastic particles that are screened and intercepted roll to the right side of the screening frame 5 and are discharged to the outside through the opening on the right side of the screening frame 5 and the impurity discharge trough 6.

[0023] A drive shaft 7 runs through the middle of the main body 1 of the device. The upper end of the drive shaft 7 is connected to a power motor 8, and the lower end is connected to a transmission connecting rod 9. A stirring plate 10 is connected to the end of the transmission connecting rod 9. The drive shaft 7 is rotatably connected to the main body 1 and the screening frame 5. The lower end of the power motor 8 is fixed to the upper end of the main body 1. The transmission connecting rod 9 and the stirring plate 10 are arranged in a circular array around the drive shaft 7. The bottom of the main body 1 has a funnel-shaped design. A stirring plate 11 is fixed to the lower end of the drive shaft 7. The lower end of the stirring plate 11 contacts the inner wall of the main body 1, and the shape of the stirring plate 11 matches the bottom shape of the main body 1. The power motor 8 drives the drive shaft 7 to rotate. When the drive shaft 7 rotates, it drives the transmission connecting rod 9 and the stirring plate 10 to rotate synchronously. The rotation of the transmission connecting rod 9 and the stirring plate 10 mixes the plastic granules inside the main body 1, achieving uniform mixing of various granular raw materials. Simultaneously, the drive shaft 7 drives the stirring plate 11 to rotate, mixing the granular raw materials at the bottom of the main body 1 and reducing dead zones in the mixing process. Meanwhile, during material feeding, the stirring plate 11 contacts the inner wall of the main body 1, which can prevent material residue from remaining on the inner wall of the main body 1 during material feeding.

[0024] A transmission groove 12 is provided at the lower end of the screening frame 5, and a transmission rod 13 is connected to the upper end of the transmission shaft 7. A guide block 14 is fixed at the end of the transmission rod 13. The transmission rod 13 and the guide block 14 are arranged in a circular array around the transmission shaft 7. The transmission groove 12 is arranged in a circular array around the center of the screening frame 5, and the transmission groove 12 is wavy. The upper end of the guide block 14 is adapted to the transmission groove 12. A guide slider 18 is fixed to the outer wall of the screening frame 5, and a guide groove 15 is provided on the inner wall of the main body 1. The guide groove 15 is slidably connected to the guide slider 18. A guide shaft 16 passes through the middle of the guide slider 18. The two ends of the guide shaft 16 are fixed to the inner wall of the guide groove 15. A return spring 17 is sleeved on the upper end of the guide shaft 16, and the upper and lower ends of the return spring 17 are in contact with the guide groove 15 and the guide slider 18, respectively. When plastic granules are fed, the screening frame 5 can screen impurities. To improve the efficiency of granule screening, a shaking structure is set. The transmission shaft 7 drives the transmission rod 13 and the guide block 14 to rotate synchronously. When the guide block 14 rotates, it moves inside the transmission groove 12. According to the wave-like shape of the transmission groove 12, the rotation of the guide block 14 can drive the screening frame 5 to move upward, and cooperate with the reset spring 17 to push the screening frame 5 to reset downward, so as to realize the up and down reciprocating motion of the screening frame 5, thereby improving the screening efficiency. When the screening frame 5 moves up and down, it cooperates with the guide groove 15 and the guide slider 18 to keep the movement of the screening frame 5 stable.

[0025] This completes a series of tasks. The contents not described in detail in this specification are existing technologies known to those skilled in the art.

[0026] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A plastic raw material mixing device with a screening mechanism, comprising a main body (1) and a support leg (2) fixed at the lower end, wherein the upper end of the main body (1) is connected to a feed inlet (3) and the lower end of the main body (1) is connected to a discharge valve (4), characterized in that: A screening frame (5) is provided at the upper part of the main body (1) of the device, and a waste discharge trough (6) is provided on the right side of the screening frame (5). The main body (1) of the device has a drive shaft (7) running through the middle. The upper end of the drive shaft (7) is connected to a power motor (8), and the lower end of the drive shaft (7) is connected to a transmission link (9). The end of the transmission link (9) is connected to a stirring plate (10). The screening frame (5) has a transmission groove (12) at its lower end, the transmission shaft (7) is connected to a transmission rod (13) at its upper end, and a guide block (14) is fixed at the end of the transmission rod (13).

2. A plastic raw material mixing device with a screening mechanism according to claim 1, characterized in that: The drive shaft (7) is rotatably connected to the main body (1) and the screening frame (5). The lower end of the power motor (8) is fixed to the upper end of the main body (1). The transmission connecting rod (9) and the stirring plate (10) are arranged in a ring array with the drive shaft (7) as the center.

3. A plastic raw material mixing device with a screening mechanism according to claim 1, characterized in that: The bottom of the main body (1) of the device is designed in the shape of a funnel. The lower end of the transmission shaft (7) is fixed with a stirring plate (11). The lower end of the stirring plate (11) is in contact with the inner wall of the main body (1) of the device, and the stirring plate (11) matches the shape of the bottom of the main body (1).

4. A plastic raw material mixing device with a screening mechanism according to claim 1, characterized in that: The inner wall of the screening frame (5) is inclined, and a hole is opened on the right side of the screening frame (5), and the hole is connected to the waste discharge trough (6).

5. A plastic raw material mixing device with a screening mechanism according to claim 1, characterized in that: The transmission rod (13) and guide block (14) are arranged in a ring array around the transmission shaft (7), the transmission groove (12) is arranged in a ring array around the center of the screening frame (5), and the transmission groove (12) is arranged in a wave shape. The upper end of the guide block (14) is adapted to the transmission groove (12).

6. A plastic raw material mixing device with a screening mechanism according to claim 1, characterized in that: The outer wall of the screening frame (5) is fixed with a guide slider (18), and the inner wall of the main body (1) of the device is provided with a guide groove (15). The guide groove (15) is slidably connected with the guide slider (18). The guide slider (18) has a guide shaft (16) passing through its middle part. The two ends of the guide shaft (16) are fixed to the inner wall of the guide groove (15). The upper end of the guide shaft (16) is fitted with a reset spring (17), and the upper and lower ends of the reset spring (17) are in contact with the guide groove (15) and the guide slider (18) respectively.

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