A multi-stage classifier for modifying plastic particles

Abstract

This invention discloses a multi-stage separator for modified plastic particles, comprising a screening seat with openings on both sides. The screening seat is flip-up, and after each screening, it is flipped 180 degrees before the next screening. The openings are fitted with movable, sealing covers. A screening component forming a multi-stage screening system is located in the center of the screening seat. After each screening, the shape of the screening component is changed to uniformly change the sieve aperture. This invention, by incorporating a screening component forming a multi-stage screening system in the center of the screening seat, allows for uniform and rapid changes in sieve aperture after each screening by changing the shape of the screening component. Furthermore, it enables rapid handling of modified plastic particles trapped within the sieve apertures by changing the aperture size or by directly and quickly replacing the sieve plate.

Description

Technical Field

[0001] This invention relates to the field of plastic processing equipment technology, specifically to a multi-stage separator for modified plastic granules. Background Technology

[0002] Modified plastics refer to plastic products that have been modified from general-purpose plastics and engineering plastics through methods such as filling, blending, and reinforcement, thereby improving their properties such as flame retardancy, strength, impact resistance, and toughness.

[0003] In practical applications, several drawbacks remain. For instance, when screening modified plastics requiring different particle sizes, the entire screening unit needs to be replaced, making it impossible to quickly control the screening process. Secondly, during screening, plastic particles clog the screen holes, affecting the normal screening and feeding of the device. Furthermore, after the plastic particles pass through the screen, they may be discharged directly from the next stage discharge port due to delayed fall, affecting screening accuracy. This invention was developed to address these issues. Summary of the Invention

[0004] (a) Technical problems to be solved

[0005] To address the shortcomings of existing technologies, this invention provides a multi-stage separator for modified plastic granules, solving the problems mentioned in the background section.

[0006] (II) Technical Solution

[0007] To achieve the above objectives, the present invention is implemented through the following technical solution: a multi-stage separator for modified plastic granules, comprising a screening seat with openings on both sides, the screening seat being flip-up, and after each screening, the next screening is performed by flipping it 180 degrees, the openings are provided with a cover plate that can be movably closed for sealing, and the screening seat is provided with a screening component in the middle to form a multi-stage screening system, and after each screening, the shape of the screening component is changed to make the sieve holes uniformly changed.

[0008] Preferably, the screening seat has a slot in the middle that extends through one side.

[0009] Preferably, the screening component includes a first screen plate and a second screen plate, which are respectively movably inserted into the slots of the screening seat. The screen holes of the first screen plate and the second screen plate are corresponding one-to-one, and the screen hole diameter of the second screen plate is larger than that of the screen hole on the first screen plate.

[0010] Preferably, the sieve holes are configured as a truncated cone shape with a smaller diameter at the bottom and a larger diameter at the top, and the diameter of the lower end of the sieve holes of the first sieve plate is the same as the diameter of the upper end of the sieve holes of the second sieve plate.

[0011] Preferably, the screening component includes a screening branch plate fixed in the middle of the screening seat, with screening holes arrayed on the screening branch plate. Each screening hole is provided with a hole position control unit. A toothed plate is provided on the outer side of the screening seat. By moving the toothed plate horizontally, the hole diameter at the corresponding screening hole position can be uniformly changed.

[0012] Preferably, the orifice position control unit includes a support connected to the screen branch plate. The support has radially arranged sliding grooves at equal angles around its circumference. A movable block is slidably connected in the sliding groove. An arc-shaped stop block is connected to the upper end of the movable block. The arc-shaped stop blocks cooperate to form a ring shape. The unit also includes a rotating seat that serves as the driving position for the entire arc-shaped stop block and the movable block. The rotating seat has multiple arc-shaped rotating grooves around its circumference. Each movable block is provided with a rotating column. The rotating column and the arc-shaped rotating groove are positioned one-to-one.

[0013] Preferably, the rotating base has teeth on both sides, and two adjacent rotating bases on the top and bottom mesh with each other, while two rotating bases on the sides do not touch, so that the horizontal movement of the toothed plate can drive the entire rotating base to rotate.

[0014] Preferably, the support has a through hole in the middle and the rotating seat has a through hole of the same size. The size of the through hole is larger than the radial dimension of the inner ring of the outermost ring shape when each arc-shaped stop block moves. The two adjacent moving blocks are arranged to have a height difference, and the two adjacent arc-shaped stop blocks have longitudinal dimension overlap on both sides.

[0015] Preferably, the positions of two adjacent engagement hole position control units are reversed.

[0016] (III) Beneficial Effects

[0017] After adopting the above technical solution, the present invention has the following advantages compared with the prior art: The present invention provides a screening component in the middle of the screening seat to form a multi-stage screening system, so that after each screening, the shape of the screening component can be changed to make the screen holes uniform and quickly changed. At the same time, the problem of modified plastics stuck in the screen holes can be quickly dealt with by changing the hole diameter or by directly and quickly replacing the screen plate. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of Embodiment 1 of the present invention;

[0019] Figure 2 This is a schematic diagram of the disassembled screen plate in Embodiment 1 of the present invention;

[0020] Figure 3 This is a front cross-sectional view of screen plate one and screen plate two in Embodiment 1 of the present invention;

[0021] Figure 4This is a schematic diagram of the screening component structure in Embodiment 2 of the present invention;

[0022] Figure 5 This is a reverse view of the screening component structure in Embodiment 2 of the present invention;

[0023] Figure 6 This is a front view of the hole position control unit in Embodiment 2 of the present invention;

[0024] Figure 7 This is a reverse view of the hole position control unit in Embodiment 2 of the present invention;

[0025] Figure 8 This is a schematic diagram of the hole position control unit after disassembly in Embodiment 2 of the present invention;

[0026] Figure 9 This is a schematic diagram of the hole position control unit after disassembly in Embodiment 2 of the present invention.

[0027] In the diagram: 1. Screening seat; 2. Opening; 3. Groove; 4. Screen plate one; 5. Screen plate two; 6. Screen hole; 7. Screen branch plate; 8. Screening hole position; 9. Hole position control unit; 91. Support; 92. Rotary seat; 93. Moving block; 94. Arc-shaped stop block; 95. Slide groove; 96. Through hole; 10. Toothed plate; 11. Rotating column; 12. Arc-shaped rotating groove. Detailed Implementation

[0028] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0029] like Figure 1-9 As shown: A multi-stage separator for modified plastic granules includes a screening seat 1, which is flip-up and has openings 2 on both sides, with the inlet and outlet openings 2 being shared. A cover plate is provided at each opening 2 for sealing. A screening component forming a multi-stage screening system is located in the middle of the screening seat 1. After each screening, the shape of the screening component is changed to uniformly change the sieve apertures 6.

[0030] This solution achieves this morphological change in two ways. In one embodiment, a slot 3 is provided in the middle of the screening seat 1, extending through one side, to allow for the insertion of a screen plate and thus enabling rapid replacement of the screen holes 6. Two or more screen plates can be used. This rapid replacement method allows for quick resolution even if blockage occurs at the screen holes 6.

[0031] In another embodiment, as in Example 2, only one screen plate is set up. By adjusting the external position, the size of the screen hole 6 can be flexibly adjusted in conjunction with the internal structure, and the aperture of the screen hole 6 can be changed quickly and uniformly. Even if a blockage occurs at the screen hole 6, the problem can be quickly solved by simply increasing the aperture after screening.

[0032] The flip-type design is tailored to specific needs. Larger sizes are suitable for industrial applications, rotating via a motor driven by a pivot sleeve in the center of the screening seat 1, with a rotation angle of 180 degrees. Smaller screening seats 1 are suitable for laboratory use, allowing for the screening of modified plastic granules through manual flipping.

[0033] Example 1

[0034] See appendix Figure 1-3 A slot 3 is provided in the middle of the screening seat 1, which runs through one side of it. A screen plate 4 and a screen plate 5 are provided in the middle of the screening seat 1, which can be movably inserted into the screening seat 1. The screen hole 6 of the screen plate 4 is relatively small, and the screen hole 6 of the screen plate 5 is larger than the screen hole 6 of the screen plate 4. The screen holes 6 on the two screen plates are aligned one-to-one, so as to realize the change of the hole diameter and achieve the effect of rapid variable hole diameter screening.

[0035] Furthermore, considering that the aperture of the sieve hole 6 in the second sieve plate 5 needs to be changed, this embodiment sets the sieve hole 6 into a truncated cone shape with a smaller diameter at the bottom and a larger diameter at the top. The aperture of the lower end of the sieve hole 6 in the first sieve plate 4 is the same as the aperture of the upper end of the sieve hole 6 in the second sieve plate 5, thus enabling seamless sieving. Secondly, it avoids the modified plastic particles getting stuck between the sieve plate holes, preventing them from being difficult to handle; that is, they can enter the sieve hole 6 from the top without causing jamming.

[0036] Example 2

[0037] See appendix Figure 4-9 A screen branch plate 7 is fixed in the middle of the screening seat 1. Screening holes 8 are arrayed on the screen branch plate 7. Each screening hole 8 is equipped with a hole position control unit 9. A toothed plate 10 is provided on the outside of the screening seat 1. By moving the toothed plate 10 horizontally, the diameter of the corresponding circular screening hole 8 can be changed uniformly. Screening of different sizes is simpler and screening is more uniform.

[0038] The horizontal movement of the toothed plate 10 can be controlled by a motor, lead screw, or miniature cylinder, etc., which will not be described in detail in this solution.

[0039] Specifically, the orifice position control unit 9 includes a support 91, a rotating base 92, a movable block 93, and an arc-shaped stop block 94. The support 91 is connected to and fixed to the screen branch plate 7. The support 91 has radially arranged sliding grooves 95 at equal angles around its circumference. The movable block 93 is slidably connected within the sliding grooves 95, and the upper end of the movable block 93 is connected to the arc-shaped stop block 94. The arc-shaped stop blocks 94 cooperate to form a ring shape.

[0040] The support 91 has a through hole 96 in its middle (the rotary seat 92 also has a through hole 96 of the same size). The size of the through hole 96 is larger than the radial dimension of the inner ring of the largest ring shape formed by the mating of the arc-shaped stops 94, so that the hole diameter is completely controlled by the hole position formed by the mating of the inner ends of the arc-shaped stops 94. Secondly, since the hole position needs to be changed, while the size of the arc-shaped stops 94 remains unchanged, this solution sets a height difference between two adjacent moving blocks 93 (as shown in the attached diagram). Figure 7 As shown, taking four arc-shaped blocks 94 as an example, they form a high-low pattern (with the two high points having the same height and the two low points having the same height). At the same time, the two adjacent arc-shaped blocks 94 have longitudinal overlap on both sides, so that a certain degree of regularity is still formed during the outward movement.

[0041] Furthermore, the rotary seat 92 serves as the driving position for the entire arc-shaped stop 94 and the moving block 93. Multiple arc-shaped rotating grooves 12 are circumferentially opened inside the rotary seat 92. Each moving block 93 is provided with a rotating column 11. The rotating column 11 corresponds to the position of the arc-shaped rotating groove 12. During the rotation of the rotary seat 92, the rotating column 11 moves along the opening direction of the sliding groove 95.

[0042] The rotating base 92 has teeth on both sides, and the two adjacent rotating bases 92 mesh with each other, while the two lateral rotating bases 92 do not touch each other, so that the horizontal movement of the tooth plate 10 can drive the entire rotating base 92 to rotate (rotate row by row).

[0043] It should be noted that since the rotation directions of two adjacent rotary seats 92 are opposite, the positions of the two adjacent hole position control units 9 need to be reversed to achieve a high degree of uniformity in hole diameter change control.

[0044] The above-described embodiments are provided for illustrative purposes. Based on the above description, those skilled in the art can make various changes and modifications without departing from the inventive concept. The technical scope of this utility model is not limited to the contents of the specification; its protection scope must be determined according to the claims.

Claims

1. A multi-stage separator for modified plastic granules, characterized in that: The screen includes a screening seat with openings on both sides. The screening seat is flip-up and flips 180° after each screening for the next screening. The openings are equipped with a cover plate that can be closed to seal. The middle of the screening seat is equipped with a screening component that forms a multi-stage screening system. After each screening, the shape of the screening component is changed to make the screen holes change uniformly. The screening assembly includes a screening branch plate fixed in the middle of the screening seat, with screening holes arrayed on the screening branch plate. Each screening hole is equipped with a hole position control unit. A toothed plate is provided on the outer side of the screening seat. The horizontal movement of the toothed plate can achieve a uniform change in the hole diameter at the corresponding screening hole position. The hole position control unit includes a support connected to the screening branch plate. The support has radially arranged sliding grooves at equal angles around the circumference. A moving block is slidably connected in the sliding groove. An arc-shaped stop block is connected to the upper end of the moving block. The arc-shaped stop blocks cooperate to form a ring shape. It also includes a rotating seat that serves as the driving position for the entire arc-shaped stop block and the moving block. The rotating seat has multiple arc-shaped rotating grooves around its circumference. Each moving block is equipped with a rotating column. The rotating column and the arc-shaped rotating groove are positioned one-to-one. Teeth are provided on both sides of the rotating seat. Two adjacent rotating seats mesh with each other, while two lateral rotating seats do not touch each other, so that the horizontal movement of the toothed plate can drive the entire rotating seat to rotate.

2. The multi-stage separator for modified plastic granules according to claim 1, characterized in that: The screening seat has a slot in the middle that runs through one side.

3. A multi-stage separator for modified plastic granules according to claim 1, characterized in that: The support has a through hole in the middle and a through hole of the same size on the rotating seat. The size of the through hole is larger than the radial dimension of the inner ring of the outermost ring shape when each arc-shaped stop block moves. There is a height difference between two adjacent moving blocks, and the two adjacent arc-shaped stop blocks have longitudinal dimensions overlapping on both sides.

4. A multi-stage separator for modified plastic granules according to any one of claims 1-3, characterized in that: The positions of the two adjacent hole position control units are reversed.

Images