A screening device for modified plastic production

Abstract

The utility model belongs to modified plastics production technical field especially relates to a screening device for modified plastics production, including frame, connecting hopper, connecting frame, sieve plate and support plate etc., connecting hopper installs at the top of frame, and connecting frame sliding is placed in the upper portion in frame, and sieve plate sliding is set up in the lower portion in connecting frame, and two symmetrical distribution's support plate is slidably arranged in the inside frame through the chute, and two support plates are located below connecting frame and contact connecting frame bottom. Through the stirring and shaking linkage mechanism that servo motor, hopper, stirring paddle, threaded rod, limit stop and ball constitute, drive sieve plate reciprocating motion along the vertical direction while stirring plastic particles, realize the compound screening mode that mechanical stirring and dynamic shaking are combined, this mode effectively improves material fluidity, improves screening efficiency and the rate of sieve, is applicable to the plastic particle of poor fluidity.

Description

Technical Field

[0001] This utility model belongs to the field of modified plastics production technology, and in particular relates to a screening device for modified plastics production. Background Technology

[0002] With the rapid development of the plastics industry, modified plastics, as an important means of improving the performance of traditional plastics, have been widely used in automobiles, electronics, construction, packaging, and new energy fields. Plastic granules, as the main raw material in the production of modified plastics, directly affect the uniformity of the mixing of ingredients, the melt plasticizing effect, and the physical and mechanical properties and appearance quality of the final product due to the uniformity of their particle size distribution. Therefore, plastic granules must undergo strict screening before entering core processes such as mixing and extrusion to ensure that the particle size of the raw materials meets the process requirements.

[0003] Currently, most screening devices on the market rely on a single vibration screening mechanism. A vibrating motor drives the screen to generate up-and-down vibrations at a fixed frequency to classify plastic particles. However, in actual production scenarios, when dealing with plastic particles that have poor flowability, the particles tend to accumulate and segregate on the screen surface, resulting in uneven distribution. This makes it difficult for the plastic particles to fully contact the screen openings, significantly reducing the screening efficiency.

[0004] Therefore, there is a particular need for a screening device for the production of modified plastics to solve the above problems. Utility Model Content

[0005] In order to overcome the shortcomings of traditional screening devices that easily cause material accumulation, uneven distribution and poor contact of screen holes when processing plastic particles with poor flowability, resulting in reduced screening efficiency, this utility model provides a screening device for modified plastic production.

[0006] This utility model is achieved through the following technical approach: A screening device for modified plastic production includes a frame, a connecting hopper, a connecting frame, a sieve plate, a support plate, a support base, a rotating roller, a lead screw, a servo motor, a feeding hopper, a stirring paddle, a threaded rod, a limiting plate, ball bearings, and a controller. The connecting hopper is installed on the top of the frame, the connecting frame is slidably placed in the upper part of the frame, and the sieve plate is slidably arranged in the lower part of the connecting frame. Two symmetrically distributed support plates are slidably arranged inside the frame via grooves. The two support plates are located below the connecting frame and contact the bottom of the connecting frame. Two side-by-side rotating rollers are installed on one side of the lower part of the frame. The support base has a lead screw rotatably mounted on each support base. A rotating roller is fixed between the two lead screws at their closest ends. A servo motor is installed in the upper part of the connecting hopper. The stirring paddle is fixed to the output shaft of the servo motor. The feeding hopper is fixed to the middle shaft of the stirring paddle. The threaded rod is fixed to the end of the stirring paddle and passes through the geometric center of the screen plate. Two symmetrically distributed limiting plates are fixed to the geometric center of the screen plate. Each limiting plate is fixed with a ball bearing. The two balls bearings are respectively embedded in two spiral grooves opened on the surface of the threaded rod. The controller is installed on one side of the upper part of the frame. The servo motor is electrically connected to the controller.

[0007] Optionally, it also includes a transparent panel, with the transparent panel embedded and fixed to all four sides of the connecting frame.

[0008] Optionally, the discharge end of the hopper avoids the blade area of ​​the agitator.

[0009] Optionally, a U-shaped limiting structure is provided in the lower part of the connecting frame, and the limiting structure is arranged around the bottom edge of the screen plate.

[0010] Optionally, an annular limiting plate is provided on the upper part of the hopper, and the outer wall of the annular limiting plate forms a rotational contact with the upper part of the frame.

[0011] Optionally, the ends of the two helical grooves on the threaded rod extend into straight guide grooves, and the balls are initially located at the connection point of the corresponding helical groove and the straight guide groove.

[0012] Optionally, the highest point of the spiral groove of the threaded rod is kept at the same horizontal level as the bottom surface of the transparent plate.

[0013] Beneficial effects: 1. The stirring and shaking linkage mechanism, consisting of a servo motor, hopper, stirring paddle, threaded rod, limit plate and ball bearings, drives the screen plate to reciprocate in the vertical direction while stirring the plastic granules, realizing a composite screening mode that combines mechanical stirring and dynamic shaking. This mode effectively improves material flowability, increases screening efficiency and screening rate, and is suitable for plastic granules with poor flowability.

[0014] 2. The adjustable support limiting mechanism, consisting of a support plate, rotating roller, and lead screw, enables the rapid release and reset of the connecting frame. Operators can rotate the rotating roller to synchronously drive the two lead screws, control the horizontal movement of the support plate, thereby releasing or restoring the support limiting of the connecting frame. This facilitates the overall sliding of the connecting frame for material removal, enabling rapid disassembly and installation, convenient maintenance, and significantly reducing downtime for cleaning. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0016] Figure 2 This is a three-dimensional structural diagram of the frame, connecting bucket, and connecting frame of this utility model.

[0017] Figure 3 This is a partial cross-sectional view of the frame and connecting bucket components of this utility model.

[0018] Figure 4 This is a three-dimensional structural diagram of the support base, rotating roller, and lead screw components of this utility model.

[0019] Figure 5 This is a three-dimensional structural diagram of the servo motor, hopper, and stirring paddle components of this utility model.

[0020] Figure 6 This is a three-dimensional structural diagram of the stirring paddle, threaded rod, and limiting plate of this utility model.

[0021] Figure 7 This is a three-dimensional structural diagram of the threaded rod, limiting plate, and ball bearings of this utility model.

[0022] The components in the attached diagram are labeled as follows: 1. Frame, 2. Connecting hopper, 3. Connecting frame, 4. Transparent plate, 5. Screen plate, 6. Support plate, 7. Support base, 8. Rotating roller, 9. Lead screw, 10. Servo motor, 11. Feed hopper, 12. Agitator, 13. Threaded rod, 14. Limiting plate, 15. Ball bearing, 16. Controller. Detailed Implementation

[0023] Example: A screening device for modified plastics production, such as... Figures 1-7As shown, the system includes a frame 1, a connecting hopper 2, a connecting frame 3, a transparent plate 4, a sieve plate 5, a support plate 6, a support base 7, a rotating roller 8, a lead screw 9, a servo motor 10, a feeding hopper 11, a stirring paddle 12, a threaded rod 13, a limiting plate 14, ball bearings 15, and a controller 16. The connecting hopper 2 is fixed to the geometric center of the top of the frame 1 via a flange. The connecting frame 3 is slidably placed inside the upper part of the frame 1. Transparent plates 4 are embedded and fixedly connected to the four sides of the connecting frame 3, allowing operators to observe the screening of plastic particles inside the connecting frame 3 in real time from multiple directions. The sieve plate 5 is slidably placed inside the lower part of the connecting frame 3. A U-shaped limiting structure is provided inside the lower part of the connecting frame 3, which surrounds the bottom edge of the sieve plate 5 to restrict the sieve plate 5 in the vertical direction. The maximum downward stroke of the upper part prevents the screen plate 5 from slipping out of the connecting frame 3. Two symmetrically distributed support plates 6 are slidably arranged inside the frame 1 through a sliding groove. The two support plates 6 are located below the connecting frame 3 and contact the bottom of the connecting frame 3, thereby limiting the connecting frame 3 to the upper part inside the frame 1. Two side-by-side support seats 7 are fixed to the lower front side of the frame 1 by bolts. Each support seat 7 is rotatably equipped with a lead screw 9. A rotating roller 8 is fixedly connected between the two lead screws 9 at their close ends. The servo motor 10 is fixed to the upper part inside the connecting hopper 2 by an X-shaped bracket. The output shaft of the servo motor 10 extends vertically downward. The stirring paddle 12 is fixedly connected to the output shaft of the servo motor 10 by a coupling. The discharge hopper 11 is fixedly connected to the middle shaft of the stirring paddle 12. Furthermore, the discharge end of the hopper 11 avoids the blade area of ​​the agitator 12, ensuring that the plastic particles falling from the connecting hopper 2 do not directly impact the blades of the agitator 12, thus preventing plastic particle splashing. An annular limiting plate is provided on the upper part of the hopper 11. The outer wall of the annular limiting plate forms a rotational contact with the upper part of the frame 1, which not only guides the plastic particles falling from the connecting hopper 2 but also supports the shaft of the agitator 12, enhancing the stability of the agitator 12 during rotation. The threaded rod 13 is fixedly connected to the end of the agitator 12 and passes through the geometric center of the sieve plate 5. Two symmetrically distributed limiting plates 14 are fixedly connected to the geometric center of the sieve plate 5. Each limiting plate 14 is fixedly connected with a ball bearing 15, and the two balls bearing 15 are respectively embedded in the grooves opened on the surface of the threaded rod 13. In the two spiral grooves, the ends of the two spiral grooves on the threaded rod 13 extend into straight guide grooves. The ball 15 is initially located at the connection point of the corresponding spiral groove and the straight guide groove. When the threaded rod 13 rotates, the ball 15 rises or falls along the spiral groove, realizing the reciprocating vibration of the screen plate 5. When the connecting frame 3 needs to be removed, the ball 15 can disengage from the threaded rod 13 along the straight guide groove, realizing quick decoupling and facilitating disassembly. The highest point of the spiral groove of the threaded rod 13 is kept at the same horizontal height as the bottom surface of the transparent plate 4, thereby limiting the maximum stroke of the screen plate 5 sliding upward, ensuring that the screen plate 5 always stays in contact with the inner wall of the connecting frame 3 during the movement. The controller 16 is fixed to the center position of the upper front side of the frame 1 by bolts, and the servo motor 10 is electrically connected to the controller 16.

[0024] In the initial state, the ball 15 is located at the lowest point of the spiral groove of the threaded rod 13, and the screen plate 5 is at the lowest position of its sliding stroke; When in use, the operator connects the discharge port of the upstream feeding equipment to the connecting hopper 2, places the prepared collection frame in the lower part of the frame 1, so that the collection frame is located below the connecting frame 3 and the screen plate 5, and then starts the servo motor 10 through the controller 16, so that its output shaft drives the stirring paddle 12 to rotate clockwise. When the plastic particles to be screened enter the feeding hopper 11 from the connecting hopper 2, they are evenly dispersed and sprinkled onto the surface of the screen plate 5 as the stirring paddle 12 rotates. During the stirring process, small-diameter particles pass through the mesh of sieve plate 5 and fall into the collection box below under the action of stirring disturbance and gravity, while large-diameter particles are trapped above sieve plate 5. Meanwhile, the stirring paddle 12 drives the threaded rod 13 to rotate synchronously. The spiral groove on the threaded rod 13 drives the ball bearing 15 to roll upward along the groove, thereby driving the screen plate 5 to move upward within the connecting frame 3. When the ball bearing 15 reaches the highest point of the spiral groove, the controller 16 controls the output shaft of the servo motor 10 to switch to counterclockwise rotation, driving the stirring paddle 12 and the threaded rod 13 to rotate counterclockwise. The ball bearing 15 rolls downward along the spiral groove, and the screen plate 5 descends accordingly. When the ball bearing 15 returns to the initial position and the screen plate 5 resets, the servo motor 10 switches to clockwise rotation again, repeating the above process. Through the periodic switching of the servo motor 10, the forward and reverse rotation of the stirring paddle 12 and the up and down reciprocating shaking of the screen plate 5 are realized, forming a combined stirring and shaking screening mode, which effectively prevents the screen plate 5 from clogging, promotes rapid material classification, and improves screening efficiency. After screening, turn off the servo motor 10, hold the rotating roller 8 and rotate it counterclockwise, which will drive the two lead screws 9 to rotate counterclockwise in sync, driving the two support plates 6 to move outward, detach from the bottom of the connecting frame 3, and release the support limit on the connecting frame 3. At this time, the connecting frame 3 slides down along the inner wall of the frame 1 under the action of gravity. The operator holds the connecting frame 3 with his hand and slowly moves it to the lower part of the frame 1, takes out the connecting frame 3 and pours out the large-diameter particles remaining in it. After cleaning, push the connecting frame 3 back into the upper part of the frame 1, hold the rotating roller 8 and rotate it clockwise to drive the two support plates 6 to move inward and support the bottom of the connecting frame 3 again, thus completing the reset and preparing for the next screening operation.

Claims

1. A screening device for modified plastic production, characterized by, The system includes a frame (1), a connecting hopper (2), a connecting frame (3), a sieve plate (5), a support plate (6), a support seat (7), a rotating roller (8), a lead screw (9), a servo motor (10), a feeding hopper (11), a stirring paddle (12), a threaded rod (13), a limiting plate (14), a ball bearing (15), and a controller (16). The connecting hopper (2) is installed on top of the frame (1), the connecting frame (3) is slidably placed in the upper part of the frame (1), and the sieve plate (5) is slidably placed in the lower part of the connecting frame (3). Two symmetrically distributed support plates (6) are slidably arranged inside the frame (1) through a sliding groove. The two support plates (6) are located below the connecting frame (3) and contact the bottom of the connecting frame (3). Two side-by-side support seats (7) are installed on one side of the lower part of the frame (1). Each support seat (7) The upper rotating part is provided with a lead screw (9), and a rotating roller (8) is fixed between the two ends of the lead screw (9) that are close to each other. The servo motor (10) is installed in the upper part of the connecting bucket (2). The stirring paddle (12) is fixed on the output shaft of the servo motor (10). The feeding hopper (11) is fixed on the middle shaft of the stirring paddle (12). The threaded rod (13) is fixed at the end of the stirring paddle (12) and passes through the geometric center of the screen plate (5). Two symmetrically distributed limiting plates (14) are fixed at the geometric center of the screen plate (5). Each limiting plate (14) is fixed with a ball (15). The two balls (15) are respectively embedded in the two spiral grooves opened on the surface of the threaded rod (13). The controller (16) is installed on the upper side of the frame (1). The servo motor (10) is electrically connected to the controller (16).

2. A screening device for modified plastics production according to claim 1, characterized in that, It also includes a transparent plate (4), and the four sides of the connecting frame (3) are all embedded with transparent plates (4).

3. A screening device for modified plastics production according to claim 2, characterized in that, The discharge end of the hopper (11) avoids the blade area of ​​the agitator (12).

4. A screening device for modified plastics production according to claim 3, characterized in that, The lower part of the connecting frame (3) is provided with a square-shaped limiting structure, which surrounds the bottom edge of the sieve plate (5).

5. A screening device for modified plastics production according to claim 4, characterized in that, The upper part of the hopper (11) is provided with an annular limiting plate, and the outer wall of the annular limiting plate forms a rotational contact with the upper part of the frame (1).

6. A screening device for modified plastics production according to claim 5, characterized in that, The ends of the two spiral grooves on the threaded rod (13) extend into straight guide grooves, and the ball (15) is initially located at the connection point of the corresponding spiral groove and the straight guide groove.

7. A screening device for modified plastics production according to claim 6, characterized in that, The highest point of the spiral groove of the threaded rod (13) is at the same horizontal level as the bottom surface of the transparent plate (4).

Images