Plastic particle size accurate screening and grading equipment

Abstract

The utility model relates to the technical field of plastic production, and discloses plastic particle size accurate screening and grading equipment which comprises screening equipment, a feeding box is fixedly installed at the right end of the upper surface of the screening equipment, a vibration motor is fixedly installed on the lower surface of the screening equipment, and an installation box is fixedly installed on the front surface of the feeding box. The auxiliary feeding mechanism is arranged in the feeding box, the auxiliary feeding mechanism comprises a moving plate and a plurality of branch plates, a round rod is fixedly installed on the inner wall of the feeding box, the moving plate is slidably installed on the outer surface of the round rod, a round hole is formed in the moving plate, and the round rod is located in the round hole. Plastic particles can be evenly distributed on the multiple separating plates, accumulation and blockage during feeding are avoided, it is guaranteed that the plastic particles are evenly distributed on the screening net, the situation that particles with small particle sizes cannot pass through screening holes due to the fact that local particles are accumulated too thick is avoided, and therefore the screening and grading accuracy and precision are improved.

Description

A precise screening and grading device for plastic particles by size Technical Field

[0001] This utility model relates to the field of plastic production technology, specifically to a device for precise screening and grading of plastic particles by size. Background Technology

[0002] Plastic particles are the basic raw material for plastic processing. They are usually in granular form and are composed of synthetic resins and additives. They have a variety of properties and are generally translucent or opaque in appearance, with a variety of colors. Different materials of plastic particles have different properties. For example, polyethylene particles have good flexibility and corrosion resistance, while polypropylene particles have high hardness and heat resistance. Plastic particles have excellent processing performance and can be made into various plastic products through various molding processes such as injection molding and extrusion. They are widely used in many fields such as packaging, electronics, automobiles, and construction, playing an indispensable role in modern industry and daily life.

[0003] Currently, screening and grading equipment is needed to screen plastic particles during the production and processing of plastic particles. When screening plastic particles, they need to be added into the screening equipment. However, when plastic particles are added, small-diameter particles tend to aggregate in local areas, forming piles. This makes it difficult for small-diameter particles to pass through the sieve holes, resulting in insufficient screening in that area and affecting the screening and grading equipment's ability to screen plastic particles. Summary of the Invention

[0004] (a) Technical problems to be solved

[0005] To address the shortcomings of existing technologies, this invention provides a precise screening and grading device for plastic particles, which solves the problem that when plastic particles are added, small-diameter particles tend to aggregate in local areas, forming piles that make it difficult for them to pass through the sieve holes, resulting in insufficient screening in that area and affecting the screening and grading device's ability to screen plastic particles.

[0006] (II) Technical Solution

[0007] To achieve the above objectives, the present invention provides the following technical solution: a plastic particle size precision screening and grading device, comprising a screening device, a feeding box fixedly installed on the right end of the upper surface of the screening device, a vibration motor fixedly installed on the lower surface of the screening device, and an installation box fixedly installed on the front surface of the feeding box;

[0008] An auxiliary feeding mechanism is located inside the feeding box. The auxiliary feeding mechanism includes a moving plate and multiple sub-plates. A round rod is fixedly installed on the inner wall of the feeding box. The moving plate is slidably installed on the outer surface of the round rod. A round hole is opened inside the moving plate, and the round rod is located inside the round hole. Multiple sub-plates are fixedly installed on the lower surface of the moving plate. A connecting rod is fixedly installed on the front surface of the moving plate, and the front end of the connecting rod extends through the interior of the mounting box.

[0009] Preferably, the auxiliary feeding mechanism further includes an annular plate and a gear. The annular plate is slidably mounted on the inner wall of the mounting box and is fixedly connected to the connecting rod. Teeth are fixedly connected to both the upper and lower inner walls of the annular plate. The gear is rotatably mounted on the inner wall of the mounting box and is connected to the annular plate through tooth meshing.

[0010] Preferably, a motor is fixedly mounted on the front surface of the mounting box, and the output end of the motor rotates through the inner wall of the mounting box, with the motor and gears fixedly connected.

[0011] Preferably, a baffle is slidably inserted into the left end of the feed box, and a fixing screw is threadedly installed on the left end of the feed box, with the right end of the fixing screw threaded to the left surface of the baffle.

[0012] Preferably, a first discharge plate is fixedly installed on the left surface of the screening device.

[0013] Preferably, a second discharge plate is fixedly installed at both the front and rear ends of the screening device.

[0014] (III) Beneficial Effects

[0015] Compared with the prior art, this utility model provides a plastic particle size precise screening and grading device, which has the following beneficial effects:

[0016] 1. This plastic particle size precision screening and grading equipment, through the setting of the auxiliary feeding mechanism, enables multiple dividing plates to evenly distribute plastic particles, avoiding accumulation and blockage during feeding, ensuring uniform distribution of plastic particles on the screening screen, and preventing small-diameter particles from being unable to pass through the screen holes due to excessive local particle accumulation, thereby improving the accuracy and precision of screening and grading. Attached Figure Description

[0017] Figure 1 is a top view of the overall structure of the plastic particle size precision screening and grading equipment of this utility model.

[0018] Figure 2 is a schematic diagram of the internal cross-sectional side view of the plastic particle size precision screening and grading equipment of this utility model.

[0019] Figure 3 is a schematic diagram of the internal cross-section of the plastic particle size precision screening and grading equipment of this utility model.

[0020] Figure 4 is a cross-sectional view of the auxiliary mechanism of this utility model.

[0021] In the diagram: 1. Screening equipment; 2. Feed box; 3. Vibrating motor; 4. Mounting box; 5. Moving plate; 6. Dividing plate; 7. Round rod; 8. Circular hole; 9. Connecting rod; 10. Ring plate; 11. Gear; 12. Tooth; 13. Motor; 14. Baffle; 15. Fixing screw; 16. First discharge plate; 17. Second discharge plate. Detailed Implementation

[0022] 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.

[0023] Please refer to Figures 1-4. This utility model provides a new technical solution: a plastic particle size precision screening and grading device, including a screening device 1, a feeding box 2 fixedly installed on the right end of the upper surface of the screening device 1, a vibration motor 3 fixedly installed on the lower surface of the screening device 1, and an installation box 4 fixedly installed on the front surface of the feeding box 2.

[0024] An auxiliary feeding mechanism is located inside the feeding box 2. The auxiliary feeding mechanism includes a moving plate 5 and multiple sub-plates 6. A round rod 7 is fixedly installed on the inner wall of the feeding box 2. The moving plate 5 is slidably installed on the outer surface of the round rod 7. A circular hole 8 is opened inside the moving plate 5. The round rod 7 is located inside the circular hole 8. Multiple sub-plates 6 are fixedly installed on the lower surface of the moving plate 5. A connecting rod 9 is fixedly installed on the front surface of the moving plate 5. The front end of the connecting rod 9 extends through the interior of the mounting box 4.

[0025] Furthermore, the auxiliary feeding mechanism also includes an annular plate 10 and a gear 11. The annular plate 10 is slidably installed on the inner wall of the mounting box 4. The annular plate 10 is fixedly connected to the connecting rod 9. Teeth 12 are fixedly connected on both the upper and lower inner walls of the annular plate 10. The gear 11 is rotatably installed on the inner wall of the mounting box 4. The gear 11 and the annular plate 10 are connected by meshing teeth 12.

[0026] Furthermore, by setting up an auxiliary feeding mechanism, multiple dividing plates 6 can evenly distribute plastic particles, avoiding accumulation and blockage during feeding, ensuring uniform distribution of plastic particles on the screening screen, and preventing small-diameter particles from being unable to pass through the screen holes due to excessive local particle accumulation, thereby improving the accuracy and precision of screening and grading.

[0027] Furthermore, a motor 13 is fixedly mounted on the front surface of the mounting box 4. The output end of the motor 13 rotates through the inner wall of the mounting box 4, and the motor 13 is fixedly connected to the gear 11.

[0028] Furthermore, a baffle 14 is slidably inserted into the left end of the feed box 2, and a fixing screw 15 is threadedly installed on the left end of the feed box 2. The right end of the fixing screw 15 extends to the left surface of the baffle 14.

[0029] Furthermore, a first discharge plate 16 is fixedly installed on the left surface of the screening device 1.

[0030] Furthermore, a second discharge plate 17 is fixedly installed at both the front and rear ends of the screening device 1.

[0031] Furthermore, when using this equipment, by rotating the fixing screw 15, the position of the baffle 14 in the feed box 2 is adjusted, controlling the size of the feed opening of the feed box 2. The motor 13 is then started, and its output drives the gear 11 to rotate. Since the teeth at the lower end of the gear 11 mesh sequentially with the teeth 12 on the upper and lower inner walls of the annular plate 10, the rotation of the gear 11 causes the annular plate 10 to slide back and forth on the inner wall of the mounting box 4. The annular plate 10 is connected to the moving plate 5 via the connecting rod 9, and the left and right sliding of the annular plate 10 will drive... The connecting rod 9 causes the moving plate 5 to reciprocate left and right on the round rod 7. Multiple dividing plates 6 fixed to the lower surface of the moving plate 5 also move synchronously. During the left-right movement of the moving plate 5 and the dividing plates 6, the dividing plates 6 continuously agitate the plastic particles in the feed box 2, ensuring that the plastic particles entering the feed box 2 are evenly dispersed within it. This prevents localized accumulation or blockage when the plastic particles are added to the screening equipment 1, ultimately achieving uniform entry of plastic particles into the screening equipment 1. The plastic particles first fall to the rear end... The screening screen corresponding to the second discharge plate 17 has the largest screen aperture size, allowing for larger particle sizes. Plastic particles that cannot pass through the screen aperture remain directly on the second discharge plate 17 at the rear end, completing the first-stage screening. Plastic particles that can pass through the first-stage screening screen continue to fall and reach the screening screen corresponding to the first discharge plate 16 for the second-stage screening. This screening screen has a moderately sized screen aperture, allowing plastic particles that fit within this size range to pass through and fall onto the first discharge plate 16. Those that do not fit continue to fall. After the second-stage screening, the plastic particles that continue to fall reach the screening screen corresponding to the second discharge plate 17 at the front end. This screening screen has the smallest screen aperture size, allowing plastic particles that fit within this aperture size to pass through and fall onto the second discharge plate 17 at the front end, completing the third-stage screening. This achieves precise grading of the plastic particles. The dust collection connection pipe on the right surface of the screening device 1 can be connected to a dust collection device to remove dust and fine debris from the surface of the plastic particles during the screening process. The vibration motor 3 on the lower surface continuously vibrates, causing the plastic particles to move quickly on the screening screen, improving screening efficiency and preventing particles from clogging the screen apertures.

[0032] Structural Description: Screening Equipment 1: As the core equipment, it is used for particle size screening and grading of plastic particles. It achieves accurate classification through three-stage screening. The dust suction connection pipe on the right surface can remove impurities, and the vibration motor on the lower surface assists in screening.

[0033] Feed box 2: Fixed on the right end of the upper surface of the screening device 1, used to store plastic particles to be screened, and cooperates with the auxiliary feeding mechanism to control the particles to enter the screening device 1 evenly;

[0034] Vibration motor 3: Installed on the lower surface of screening equipment 1, it generates vibration during operation, which causes plastic particles to move quickly inside screening equipment 1, improves screening efficiency, and prevents screen holes from clogging.

[0035] Mounting box 4: Fixed to the front surface of the feed box 2, and internally installed with components such as ring plate 10 and gear 11, providing power transmission and movement space for the auxiliary feeding mechanism;

[0036] Moving plate 5: It is slidably installed on the round rod 7 inside the feed box 2, and connected to the annular plate 10 through the connecting rod 9, which drives the dividing plate 6 to move left and right to achieve uniform distribution of plastic particles;

[0037] Separating plate 6: Fixed to the lower surface of the moving plate 5, it moves with the moving plate 5 to agitate the plastic particles, so that the particles are evenly dispersed in the feed box 2 and avoid accumulation.

[0038] Round rod 7: Fixed to the inner wall of the feed box 2, providing a sliding track for the moving plate 5, ensuring the stability and accuracy of the left and right movement of the moving plate 5;

[0039] Circular hole 8: It is opened inside the movable plate 5 and fitted on the outside of the circular rod 7, so that the movable plate 5 can slide smoothly along the circular rod 7 and cooperate with the movable plate to realize its function;

[0040] Connecting rod 9: One end is fixed to the front surface of the moving plate 5, and the other end passes through the mounting box 4, connecting the moving plate 5 and the ring plate 10, and transmitting the motion power of the ring plate 10;

[0041] Annular plate 10: It is slidably installed on the inner wall of the mounting box 4. The upper and lower inner walls have teeth that mesh with gear 11. It slides left and right under the drive of gear 11 and drives the moving plate 5 to move through the connecting rod 9.

[0042] Gear 11: Rotatably mounted on the inner wall of the mounting box 4 and driven by the motor 13. The lower half of the gear 11 is equipped with teeth, and its lower teeth mesh with the teeth of the ring plate 10, converting the rotational motion into the linear motion of the ring plate 10.

[0043] Tooth 12: Fixed on the upper and lower inner walls of the annular plate 10, meshing with the lower teeth of the gear 11, realizing the reciprocating motion of the annular plate 10, and is a key structure for power transmission;

[0044] Motor 13: Installed on the front surface of the mounting box 4, it provides rotational power to gear 11, serves as the power source for the auxiliary feeding mechanism, and controls the movement frequency of the moving plate 5;

[0045] Baffle 14: It is slidably inserted into the left end of the feed box 2. Its position is adjusted by fixing screw 15 to control the size of the feed opening of the feed box 2 and adjust the feed speed.

[0046] Fixed screw 15: It is threadedly installed on the left end of the feed box 2 and threadedly connected to the baffle 14. Rotating the screw can adjust the position of the baffle 14 and flexibly control the feed amount.

[0047] First discharge plate 16: Fixed on the left surface of screening equipment 1, used to receive plastic particles after secondary screening and output particles that meet the secondary particle size requirements;

[0048] Second discharge plate 17: There are two in total, which are fixed at the front and rear ends of the screening equipment 1 respectively. The rear end is used for primary screening discharge, and the front end is used for tertiary screening discharge, outputting plastic particles of the corresponding particle size.

[0049] 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 precision screening and grading device for plastic particles, comprising a screening device (1), a feed box (2) fixedly installed on the right end of the upper surface of the screening device (1), and a vibration motor (3) fixedly installed on the lower surface of the screening device (1), characterized in that: The front surface of the feed box (2) is fixedly mounted with an installation box (4); an auxiliary feeding mechanism is set inside the feed box (2), the auxiliary feeding mechanism includes a moving plate (5) and multiple sub-plates (6), a round rod (7) is fixedly mounted on the inner wall of the feed box (2), the moving plate (5) is slidably mounted on the outer surface of the round rod (7), a round hole (8) is opened inside the moving plate (5), the round rod (7) is located inside the round hole (8), multiple sub-plates (6) are fixedly mounted on the lower surface of the moving plate (5), a connecting rod (9) is fixedly mounted on the front surface of the moving plate (5), and the front end of the connecting rod (9) penetrates into the interior of the installation box (4).

2. The plastic particle size precision screening and grading equipment according to claim 1, characterized in that: The auxiliary feeding mechanism also includes an annular plate (10) and a gear (11). The annular plate (10) is slidably installed on the inner wall of the mounting box (4). The annular plate (10) is fixedly connected to the connecting rod (9). Teeth (12) are fixedly connected on the upper and lower inner walls of the annular plate (10). The gear (11) is rotatably installed on the inner wall of the mounting box (4). The gear (11) and the annular plate (10) are connected by meshing teeth (12).

3. The plastic particle size precision screening and grading equipment according to claim 2, characterized in that: A motor (13) is fixedly installed on the front surface of the mounting box (4). The output end of the motor (13) rotates through the inner wall of the mounting box (4). The motor (13) is fixedly connected to the gear (11).

4. The plastic particle size precision screening and grading equipment according to claim 1, characterized in that: A baffle (14) is slidably inserted into the left end of the feed box (2), and a fixing screw (15) is threadedly installed on the left end of the feed box (2). The right end of the fixing screw (15) extends to the left surface of the baffle (14).

5. The plastic particle size precision screening and grading equipment according to claim 1, characterized in that: The first discharge plate (16) is fixedly installed on the left surface of the screening device (1).

6. The plastic particle size precision screening and grading equipment according to claim 1, characterized in that: The screening device (1) is fixedly equipped with a second discharge plate (17) at both the front and rear ends.

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