Density screening device for polypropylene particle processing
By employing a dual screening device and a composite motion method, the problem of uneven polypropylene particle density was solved, achieving efficient and precise screening results and improving the quality and production efficiency of plastic products.
Patent Information
- Application Number
- CN202423245501.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-27
- Publication Date
- 2026-02-06
- Estimated Expiration
- 2034-12-27
AI Technical Summary
In existing technologies, uneven density of polypropylene particles leads to quality problems in plastic products. Traditional screening methods are inefficient, have limited precision, and are prone to equipment damage, making it difficult to meet the needs of large-scale industrial production.
A dual screening device is designed, which adopts a double-layer screen structure and combines transverse reciprocating and vibrating motion. The screen is moved laterally and vibrated up and down by a drive cylinder to achieve precise grading and screening of polypropylene particles.
It improves screening efficiency and accuracy, reduces material waste, ensures the stability and continuity of the screening process, reduces equipment maintenance costs, and improves the quality and yield of plastic products.
Smart Images
Figure CN223875517U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to the screening device field, concretely is a density screening device for polypropylene particle processing. BACKGROUND
[0002] In the field of plastic product production, polypropylene particles are a kind of raw materials with extremely wide application, and the quality directly affects the performance of plastic products. And the density of polypropylene particles as a key indicator plays a decisive role in subsequent processing and product quality. For example, when manufacturing plastic pipes, polypropylene particles with uniform density can ensure that the pipes have good compressive strength and stability. When producing plastic film, particles with consistent density can make the transparency, tensile strength and other properties of the film more stable.
[0003] However, in the actual production process of polypropylene particles, affected by various factors such as slight fluctuations in polymerization conditions and differences in raw material quality, the density of the particles produced is not completely uniform. If these polypropylene particles with uneven density are directly put into use, it will bring many problems to the production of plastic products. In the injection molding process, particles with different densities may cause uneven shrinkage, uneven surface and other defects of plastic products. In the blowing process, it may cause inconsistent wall thickness of the product, reducing the overall quality and yield of the product.
[0004] To solve the problem of uneven density of polypropylene particles, screening technology is the key link. The traditional screening method mainly relies on manual screening, which not only has low efficiency, but is also greatly affected by human factors, making it difficult to ensure the accuracy and stability of screening and unable to meet the needs of large-scale industrial production. Some enterprises use vibrating screens for screening, which can improve efficiency to some extent, but for polypropylene particles with small density difference, the screening precision is limited, and it is difficult to accurately separate particles in different density intervals. In addition, long-term vibration can easily cause screen wear, increase equipment maintenance cost and downtime, and affect production continuity. Therefore, we propose a density screening device for polypropylene particle processing. SUMMARY
[0005] (I) Technical problems solved
[0006] In view of the deficiencies of the prior art, the utility model provides a density screening device for polypropylene particle processing, which solves the above problems.
[0007] (II) Technical solutions
[0008] To achieve the above-mentioned purposes, the utility model provides technical solutions as follows: A density screening device for polypropylene particle processing, including the shell, the inside of shell is provided with two screen meshes, the side surface of shell is provided with strip opening corresponding to screen mesh position, the outside of shell is provided with drive cylinder, the output shaft of drive cylinder is connected with screen mesh through strip opening, the filter aperture of upper screen mesh is greater than the filter aperture of lower screen mesh.
[0009] Preferably, the concave-shaped mounting frame is fixedly installed on the position of the side surface of the shell corresponding to the drive cylinder, and the drive cylinder and the mounting frame are fixedly connected together.
[0010] Preferably, the upper side of the shell is provided with an inclined plate corresponding to the screen mesh.
[0011] Preferably, the frame position of the screen mesh is provided with a screen mesh groove, the lower end of the inclined plate is integrally formed with a sliding block corresponding to the screen mesh groove position, the sliding block and the screen mesh groove are slidably connected together, and the lower end of the inclined plate is integrally formed with a protruding baffle corresponding to the screening area surface of the screen mesh.
[0012] Preferably, the two sides of the screen mesh are integrally formed with screen mesh connecting strips, the inner wall of the shell is provided with an inner wall sliding groove, and the screen mesh connecting strips and the inner wall sliding groove are slidably connected together.
[0013] Preferably, the lower end of the screen mesh connecting strip on the two sides is integrally formed with a rectangular protrusion, a strip-shaped groove is formed between the rectangular protrusions on the two sides, a connecting horizontal plate that can move up and down is movably installed between the strip-shaped grooves of the two rectangular protrusions, and the connecting horizontal plate and the output shaft of the drive cylinder are fixedly connected together.
[0014] Preferably, a plurality of sliding groove protrusions are equidistantly installed on the bottom inner wall of the inner wall sliding groove, a plurality of screen mesh protrusions are equidistantly installed on the lower wall surface of the screen mesh connecting strip, the position of each screen mesh protrusion corresponds to the gap between the adjacent two sliding groove protrusions, and the sliding groove protrusions and the screen mesh protrusions are semicircular.
[0015] (Three) beneficial effects
[0016] Compared with the prior art, the utility model provides a density screening device for polypropylene particle processing, which has the following beneficial effects:
[0017] 1、The density screening device for polypropylene particle processing has double screening design: two screen meshes are arranged in the device, and the filter aperture of the upper screen mesh is greater than that of the lower screen mesh. The polypropylene particles are first screened by the upper screen mesh for the first time and then screened by the lower screen mesh for the second time. This double screening structure can more accurately classify the polypropylene particles according to density, effectively improving the screening efficiency and quality.
[0018] Transverse reciprocation combined with vibration: the driving cylinder drives the screen to move transversely, and the screen protrusion cooperates with the sliding groove protrusion to make the screen vibrate up and down when moving transversely. This compound movement makes the movement of polypropylene particles on the screen more complex and sufficient, effectively avoids particle accumulation, and makes particles of different densities more easily pass through the corresponding screen, thereby improving the screening efficiency.
[0019] 2、The density screening device for polypropylene particle processing, the inner walls of the two sides of the shell are provided with downward inclined inclined plates above the screen. When pouring polypropylene particles, the particles can slide down the inclined plate to the surface of the screen, which is simple to operate and does not require complex feeding auxiliary equipment, effectively improving the convenience and smoothness of feeding.
[0020] 3、The density screening device for polypropylene particle processing, the sliding block at the lower end of the inclined plate is slidingly connected with the screen groove of the screen frame, and the surface of the screen screening area is integrally formed with a protruding baffle corresponding to the lower end of the inclined plate. This structure design effectively prevents the particles from entering the inside of the shell through the gap between the lower end of the inclined plate and the screen when adding polypropylene particles, avoids material waste, ensures the cleanliness of the screening work area, and also helps to maintain the normal operation of the screening device.
[0021] 4、The density screening device for polypropylene particle processing, the installation frame fixedly fixes the driving cylinder: the concave-shaped installation frame installed on the side of the shell can stably fix the driving cylinder. This not only ensures the stability of the driving cylinder during operation and prolongs its service life, but also ensures the stable and reliable driving effect of the driving cylinder on the screen, so that the transverse reciprocating movement of the screen is more stable, which is conducive to improving the accuracy and consistency of screening.
[0022] Screen connection and guide structure: the screen connection strips on both sides of the screen are slidingly connected with the inner wall sliding grooves of the inner wall of the shell, providing reliable guidance and stable support for the transverse movement of the screen. This structure ensures that the screen does not deviate or shake during movement, ensuring the stability and continuity of the screening work.
[0023] 5、The density screening device for polypropylene particle processing, the sliding groove protrusion at the bottom of the inner wall sliding groove cooperates with the screen protrusion on the lower wall surface of the screen connection strip, and the screen vibrates up and down when moving transversely. This vibration can make the polypropylene particles on the screen change position constantly, increase the opportunity of particle contact and passing through the screen, and more effectively separate particles with similar densities, significantly enhancing the screening effect. BRIEF DESCRIPTION OF DRAWINGS
[0024] Figure 1 It is a schematic view of the bottom structure of the utility model;
[0025] Figure 2 It is a schematic view of the side of the utility model;
[0026] Figure 3 A-A sectional view in Figure 2 ;
[0027] Figure 4 A-A sectional view in Figure 3 ;
[0028] Figure 5 A-A sectional view in Figure 2 ;
[0029] Figure 6 A-A sectional view in Figure 5 .
[0030] In the figure: 1, the shell; 2, strip-shaped opening; 3, mounting frame; 4, drive cylinder; 5, inner wall sliding groove; 6, screen; 7, inclined plate; 8, screen slot; 9, sliding block; 10, protruding baffle; 11, sliding groove protrusion; 12, screen connecting strip; 13, screen protrusion; 14, connecting cross plate. DETAILED DESCRIPTION
[0031] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the present application.
[0032] Please refer to Figures 1-6 , a density screening device for polypropylene particle processing, comprising a shell 1, two screens 6 are arranged in the shell 1, strip-shaped openings 2 are formed on the side surface of the shell 1 corresponding to the positions of the screens 6, a drive cylinder 4 is arranged on the outside of the shell 1, the output shaft of the drive cylinder 4 is connected with the screens 6 through the strip-shaped openings 2, the filter aperture of the upper screen 6 is larger than that of the lower screen 6, when the polypropylene particles need to be screened, the polypropylene particles are poured on the uppermost screen 6, then the drive cylinder 4 is started, the output shaft of the drive cylinder 4 is reciprocatingly extended and retracted to pull and drive the screens 6 to move reciprocatingly horizontally, then the upper screen 6 performs the first screening on the polypropylene particles, and the lower screen 6 performs the second screening on the polypropylene particles.
[0033] Further, a concave-shaped mounting frame 3 is fixedly arranged on the side surface of the shell 1 corresponding to the position of the drive cylinder 4, and the drive cylinder 4 is fixedly connected with the mounting frame 3.
[0034] Further, the two side inner walls of the shell 1 are provided with downwardly inclined inclined plates 7 corresponding to the upper part of the screen 6. By increasing the inclined plates 7, the polypropylene particles can flow along the inclined plates 7 onto the surface of the screen 6 when pouring the polypropylene particles, facilitating the addition of polypropylene particles.
[0035] Further, the frame position of the screen 6 is provided with a screen slot 8, and the lower end of the inclined plate 7 is integrally formed with a sliding block 9 corresponding to the position of the screen slot 8. The sliding block 9 and the screen slot 8 are slidably connected together, and the lower end of the inclined plate 7 is integrally formed with a raised baffle 10 corresponding to the surface of the screening area of the screen 6. By increasing the sliding block 9 and the raised baffle 10, it can prevent the polypropylene particles from moving into the inside of the shell 1 between the lower end of the inclined plate 7 and the screen 6 when adding the polypropylene particles, achieving the effect of preventing leakage.
[0036] Further, the two sides of the screen 6 are integrally formed with screen connecting strips 12, and the inner wall of the shell 1 is provided with an inner wall sliding groove 5. The screen connecting strips 12 and the inner wall sliding groove 5 are slidably connected together.
[0037] Further, the lower end of the screen connecting strip 12 on both sides is integrally formed with a rectangular protrusion, and a strip-shaped slot is provided between the rectangular protrusions on both sides. A movable connecting plate 14 is movably installed between the strip-shaped slots of the two rectangular protrusions, and the connecting plate 14 is fixedly connected with the output shaft of the driving cylinder 4.
[0038] Further, a plurality of sliding groove protrusions 11 are installed equidistantly on the bottom inner wall of the inner wall sliding groove 5, and a plurality of screen protrusions 13 are installed equidistantly on the lower wall surface of the screen connecting strip 12. The position of each screen protrusion 13 corresponds to the gap between the adjacent two sliding groove protrusions 11. The sliding groove protrusions 11 and the screen protrusions 13 are semicircular. When the driving cylinder 4 pulls the screen 6 to move horizontally, when the screen protrusion 13 moves to the peak valley of one of the sliding groove protrusions 11, because the connecting plate 14 and the screen connecting strip 12 are movably connected, the screen connecting strip 12 will move downward, driving the screen 6 to move upward. When the screen protrusion 13 moves to the gap between the two sliding groove protrusions 11, due to the neutral reason, at this time the screen connecting strip 12 moves downward, and the screen 6 moves downward. In this way, the screen 6 can move horizontally and reciprocally, and at the same time, the screen 6 can vibrate up and down, achieving effective screening of the polypropylene particles.
[0039] Structure description:
[0040] Shell 1:
[0041] Position and function: as the external frame of the whole device, providing installation space and support for internal components, protecting the internal structure and defining the screening work area.
[0042] Related structure: Its side is provided with a strip-shaped opening 2, which is used for the output shaft of the driving cylinder 4 to pass through and connect the screen 6, so as to drive the screen 6; the inner wall of the two sides is provided with a downward inclined inclined plate 7, which is convenient for polypropylene particles to pour into the screen 6; the inner wall is also provided with an inner wall sliding groove 5, which is slidingly connected with the screen connecting strip 12 on the two sides of the screen 6, and provides guidance for the transverse movement of the screen 6.
[0043] Strip-shaped opening 2:
[0044] Position and function: It is provided on the side of the shell 1 and corresponds to the position of the screen 6. It provides a channel for the output shaft of the driving cylinder 4, so that the driving cylinder 4 can be connected with the screen 6, thereby driving the screen 6 to move transversely and reciprocally.
[0045] Mounting frame 3:
[0046] Position and function: It is fixedly installed on the side of the shell 1 and corresponds to the position of the driving cylinder 4. It is in the shape of a concave letter, which is used to stably install the driving cylinder 4, so as to ensure the stability of the driving cylinder 4 during the working process, and to reliably provide power for the screen 6.
[0047] Driving cylinder 4:
[0048] Position and function: It is installed on the mounting frame 3, and its output shaft passes through the strip-shaped opening 2 and is connected with the screen 6. By the reciprocating extension and contraction of the output shaft, the screen 6 is pulled and dragged, and the screen 6 is driven to move transversely and reciprocally, which is the power source for realizing the movement of the screen 6 and thereby performing the screening work.
[0049] Inner wall sliding groove 5:
[0050] Position and function: It is provided on the inner wall of the shell 1 and is slidingly connected with the screen connecting strip 12 on the two sides of the screen 6. It provides guidance and support for the transverse movement of the screen 6, and ensures that the screen 6 can stably move transversely and reciprocally under the driving of the driving cylinder 4.
[0051] Related structure: A plurality of groups of sliding groove protrusions 11 are installed on the bottom inner wall of the inner wall sliding groove 5 at equal intervals, which cooperate with the screen protrusions 13 on the lower wall surface of the screen connecting strip 12, so that the screen 6 vibrates up and down when the screen 6 moves transversely, thereby enhancing the screening effect.
[0052] Screen 6:
[0053] Position and function: It is arranged in the inside of the shell 1 and has two upper and lower screens, and the filter aperture of the upper screen 6 is larger than that of the lower screen 6. They are the direct working components for screening polypropylene particles, and realize the grading and screening of polypropylene particles with different densities through transverse and reciprocal movement and up and down vibration.
[0054] Related structure: The screen slot 8 is opened on the frame position of the screen 6, and is slidably connected with the sliding block 9 at the lower end of the inclined plate 7, so as to fix the inclined plate 7 and prevent the polypropylene particles from leaking; the screen connecting strips 12 are integrally formed on the two sides of the screen 6, and are slidably connected with the inner wall sliding grooves 5, so as to realize the horizontal movement of the screen 6; the rectangular protrusions are integrally formed at the lower end of the screen connecting strips 12, the connecting horizontal plate 14 is movably installed in the strip-shaped slot between the two rectangular protrusions, and the connecting horizontal plate 14 is fixedly connected with the output shaft of the driving cylinder 4, so that the driving cylinder 4 can drive the screen 6 to move; the lower wall surface of the screen connecting strip 12 is equidistantly provided with a plurality of screen protrusions 13, and the screen protrusions 13 are matched with the sliding groove protrusions 11 at the bottom of the inner wall sliding grooves 5, so that the screen 6 can vibrate up and down when moving horizontally.
[0055] Inclined plate 7:
[0056] Position and function: The inclined plate 7 is arranged on the inner wall of the two sides of the shell 1, corresponds to the upper side of the screen 6, and is downwardly inclined. The function is to guide the polypropylene particles poured to slide along the inclined surface to the surface of the screen 6, so as to facilitate the addition of the polypropylene particles.
[0057] Related structure: The sliding block 9 is integrally formed at the lower end of the inclined plate 7 and corresponds to the position of the screen slot 8, and is slidably connected with the screen slot 8 on the frame of the screen 6; the protruding baffle 10 is also integrally formed at the lower end of the inclined plate 7 and corresponds to the surface of the screening area of the screen 6, which together prevent the particles from moving to the inside of the shell 1 along the gap between the lower end of the inclined plate 7 and the screen 6 when the polypropylene particles are added, and achieve the function of preventing leakage.
[0058] Screen slot 8:
[0059] Position and function: The screen slot 8 is opened on the frame position of the screen 6. It is slidably connected with the sliding block 9 at the lower end of the inclined plate 7, which not only realizes the connection between the inclined plate 7 and the screen 6, but also effectively prevents the polypropylene particles from leaking from the connection between the inclined plate 7 and the screen 6.
[0060] Sliding block 9:
[0061] Position and function: The sliding block 9 is integrally formed at the lower end of the inclined plate 7 and corresponds to the position of the screen slot 8. It is slidably connected with the screen slot 8, which stably connects the inclined plate 7 to the screen 6, and cooperates with the protruding baffle 10 to prevent the polypropylene particles from leaking.
[0062] Protruding baffle 10:
[0063] Position and function: The protruding baffle 10 is integrally formed at the lower end of the inclined plate 7 and corresponds to the surface of the screening area of the screen 6. It cooperates with the sliding block 9 to prevent the particles from moving to the inside of the shell 1 along the gap between the lower end of the inclined plate 7 and the screen 6 when the polypropylene particles are added, and achieves the function of preventing leakage.
[0064] Sliding groove protrusion 11:
[0065] Position and function: Equidistantly installed on the bottom inner wall of the inner wall sliding groove 5. It cooperates with the screen protrusion 13 on the lower wall surface of the screen connecting strip 12. When the screen 6 moves horizontally under the drive of the cylinder 4, the screen protrusion 13 moves on the sliding groove protrusion 11. Due to the shape of the screen protrusion 13 and the sliding groove protrusion 11 and the movable connection of the connecting plate 14 and the screen connecting strip 12, the screen 6 vibrates up and down while moving horizontally, enhancing the screening effect of the polypropylene particles.
[0066] Screen connecting strip 12:
[0067] Position and function: Integrally formed on both sides of the screen 6, slidingly connected with the inner wall sliding groove 5, providing guidance and support for the horizontal movement of the screen 6 in the shell 1. At the same time, the rectangular protrusion and the strip-shaped slot at the lower end are used to install the connecting plate 14, realizing the connection with the output shaft of the drive cylinder 4, so that the drive cylinder 4 can drive the screen 6 to move.
[0068] Related structure: The lower wall surface is equidistantly installed with multiple sets of screen protrusions 13, which cooperate with the sliding groove protrusions 11 at the bottom of the inner wall sliding groove 5, realizing the up and down vibration of the screen 6 when moving horizontally.
[0069] Screen protrusion 13:
[0070] Position and function: Equidistantly installed on the lower wall surface of the screen connecting strip 12. It cooperates with the sliding groove protrusion 11 at the bottom of the inner wall sliding groove 5. During the horizontal movement of the screen 6, due to the shape characteristics of the screen protrusion 13 and the sliding groove protrusion 11 and the movable connection relationship between the connecting plate 14 and the screen connecting strip 12, the screen 6 vibrates up and down, thereby improving the screening efficiency and quality of the polypropylene particles.
[0071] Connecting plate 14:
[0072] Position and function: Movable installed between the strip-shaped slots of the rectangular protrusions at the lower end of the two screen connecting strips 12, and fixedly connected with the output shaft of the drive cylinder 4. It plays the role of connecting the drive cylinder 4 and the screen 6, transmitting the power of the drive cylinder 4 to the screen 6, driving the screen 6 to move horizontally and reciprocally, and allowing the screen connecting strip 12 to move up and down in the cooperation process of the screen protrusion 13 and the sliding groove protrusion 11, thereby making the screen 6 vibrate up and down.
[0073] Working principle: When the polypropylene particles need to be screened, pour the polypropylene particles onto the uppermost screen 6, then start the drive cylinder 4, the output shaft of the drive cylinder 4 reciprocates and pulls, driving the screen 6 to move horizontally and reciprocally, then the upper screen 6 performs the first screening on the polypropylene particles, and the lower screen 6 performs the second screening on the polypropylene particles.
[0074] Although the embodiments of the present application have been shown and described, it is to be understood that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present application, the scope of which is defined by the appended claims and their equivalents.
Claims
1. A polypropylene granule processing density screening device comprising a housing (1), characterized in that, The inside of the shell (1) is provided with two screens (6), the side of the shell (1) is provided with a strip-shaped opening (2) corresponding to the position of the screen (6), the outside of the shell (1) is provided with a driving cylinder (4), the output shaft of the driving cylinder (4) is connected with the screen (6) through the strip-shaped opening (2), and the filter aperture of the upper screen (6) is greater than that of the lower screen (6).
2. A density screening device for polypropylene granules processing according to claim 1, characterized in that: The side of the shell (1) is provided with a concave-shaped mounting frame (3) corresponding to the position of the driving cylinder (4), and the driving cylinder (4) and the mounting frame (3) are fixedly connected together.
3. A density screening device for polypropylene granules processing according to claim 1, characterized in that: The inside wall of the shell (1) is provided with a downwardly inclined inclined plate (7) corresponding to the upper side of the screen (6).
4. A density screening device for polypropylene granules processing according to claim 3, characterized in that: The frame position of the screen (6) is provided with a screen groove (8), the lower end of the inclined plate (7) is integrally formed with a sliding block (9) corresponding to the position of the screen groove (8), the sliding block (9) and the screen groove (8) are slidably connected together, and the lower end of the inclined plate (7) is integrally formed with a convex baffle (10) corresponding to the screening area surface of the screen (6).
5. A density screening device for polypropylene granules processing as claimed in claim 1, wherein: Both sides of the screen (6) are integrally formed with a screen connecting strip (12), the inner wall of the shell (1) is provided with an inner wall sliding groove (5), and the screen connecting strip (12) and the inner wall sliding groove (5) are slidably connected together.
6. A density screening device for polypropylene granules processing according to claim 5, characterized in that: The lower end of the screen connecting strip (12) on both sides is integrally formed with a rectangular protrusion, a strip-shaped groove is formed between the rectangular protrusions on both sides, a movable connecting horizontal plate (14) is movably arranged between the strip-shaped grooves of the two rectangular protrusions, and the connecting horizontal plate (14) is fixedly connected with the output shaft of the driving cylinder (4).
7. A density screening device for polypropylene granules processing according to claim 5, characterized in that: A plurality of sliding groove protrusions (11) are equidistantly arranged on the bottom inner wall of the inner wall sliding groove (5), a plurality of screen protrusions (13) are equidistantly arranged on the lower wall surface of the screen connecting strip (12), the position of each screen protrusion (13) corresponds to the gap between the adjacent two sliding groove protrusions (11), and the sliding groove protrusions (11) and the screen protrusions (13) are semicircular.