Screening device for plastic particle production

Abstract

The utility model relates to a screening device for plastic particle production, which comprises a frame and a screening cylinder, two supports respectively positioned at two ends of the screening cylinder are arranged on the frame, two ends of the screening cylinder are respectively rotatably connected onto the two supports and are in transmission connection with a first motor, a cross beam positioned above the screening cylinder is connected between the two supports, and the cross beam is connected with a second motor. A plurality of mounting arms are fixedly connected to the cross beam, a plurality of cleaning rollers abutting against the outer circumferential face of the screening barrel are rotationally connected to the mounting arms, the adjacent cleaning rollers are in transmission connection, and the cleaning roller at the most side end is in transmission connection with a second motor arranged on the support. According to the screening device for plastic particle production, plastic particles clamped into the screening holes of the screening barrel are cleaned through the rotating cleaning roller, the trouble of thermotechnical cleaning is omitted, manpower is saved, and the production efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of plastic particle production equipment, in particular to a screening device for plastic particle production. Background Art

[0002] After the production of plastic particles is completed and before they are packaged, the plastic particles need to be screened according to their size. In the prior art, for example, the utility model patent: A screening machine for plastic particle screening (application number: 202121875055.9) discloses a drum-type screening device. However, when the above-mentioned drum-type screening device screens the plastic particles, some plastic particles will be stuck in the sieve holes of the screening drum, affecting the permeability of the screening drum and affecting the screening effect. The screening drum needs to be cleaned manually, which is more troublesome to operate and wastes manpower.

[0003] In view of the above problems, the present invention makes improvements. Utility Model Content

[0004] The utility model provides a screening device for plastic particle production, which solves the above-mentioned problems existing in the prior art during use.

[0005] The technical solution of the utility model is achieved in this way:

[0006] A screening device for producing plastic particles comprises a frame and a screening drum, wherein the frame is provided with two brackets respectively located at two ends of the screening drum, the two ends of the screening drum are respectively rotatably connected to the two brackets and are transmission-connected to a first motor, a crossbeam located above the screening drum is connected between the two brackets, a plurality of mounting arms are fixedly connected to the crossbeam, a plurality of cleaning rollers that abut against the outer circumferential surface of the screening drum are rotatably connected to the mounting arms, the adjacent cleaning rollers are transmission-connected and the cleaning roller at the most side end is transmission-connected to a second motor arranged on the bracket.

[0007] Preferably, the screening drum is composed of a center frame connected to a plurality of screening nets, the two ends of the center frame are rotatably connected to two brackets and are transmission connected to the first motor, the screening net is composed of two symmetrical screening half nets, and the screening half net is fixedly connected to the center frame by a plurality of bolts passed through the ends.

[0008] Preferably, the cleaning roller is a brush roller.

[0009] Preferably, a material removing rod is fixedly connected to the mounting arm and is located at one side of the cleaning roller and contacts the circumferential surface of the cleaning roller.

[0010] Preferably, the mounting arm, the cleaning roller, the material-moving rod and the second motor are symmetrically arranged in two groups along the crossbeam.

[0011] Preferably, a positioning plate located between the ends of the two screening half nets is fixedly connected to the central frame, and the ends of the screening half nets are in contact with the positioning plate.

[0012] Preferably, a support plate is provided on the frame, one end of the support plate is hinged to the frame, and the other end is hinged to the output shaft of a hydraulic cylinder hinged to the frame, the bracket is arranged on the support plate, and a drop port is opened on the support plate below the screening drum.

[0013] Preferably, the width of the material drop opening is smaller than the diameter of the screening net, and the support plate is provided with two recovery boxes respectively located on both sides of the material drop opening.

[0014] To sum up, the beneficial effect of the utility model is that the second motor drives a plurality of cleaning rollers to rotate, and during the rotation of the cleaning rollers, the bristles of the cleaning rollers will continuously extend into the sieve holes of the screening net and sweep across the surface of the screening net, pushing the plastic particles stuck in the sieve holes of the screening net during the screening process back into the screening cylinder for continued screening or sweeping out of the sieve holes of the screening net and falling along the outer circumferential surface of the screening net, thereby cleaning the sieve holes of the screening net, ensuring the passability of the screening net, and ensuring the screening effect, and no manual participation is required in the cleaning process of the screening net, saving manpower and improving production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0016] Figure 1 It is a structural schematic diagram of the utility model;

[0017] Figure 2 It is a structural schematic diagram of another perspective of the utility model;

[0018] Figure 3 It is a structural schematic diagram of the cleaning roller in the utility model;

[0019] Figure 4 It is an exploded schematic diagram of the screening cylinder in the utility model.

[0020] In the figure: 1. frame; 2. screening cylinder; 21. center frame; 211. positioning plate; 22. screening net; 221. screening half net; 3. bracket; 4. first motor; 5. crossbeam; 6. mounting arm; 7. cleaning roller; 8. second motor; 9. material pusher rod; 10. support plate; 101. drop port; 11. hydraulic cylinder; 12. recovery box. DETAILED DESCRIPTION

[0021] The following will be combined with the attached embodiment of the present utility model Figure 1-4 , clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of them. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] As shown in the figure, a screening device for producing plastic particles includes a frame 1 and an inclined screening drum 2, wherein the frame 1 is provided with two brackets 3 respectively located at the two ends of the screening drum 2, the two ends of the screening drum 2 are respectively rotatably connected to the two brackets 3 and are transmission-connected to the first motor 4, a crossbeam 5 located above the screening drum 2 is connected between the two brackets 3, a plurality of mounting arms 6 are fixedly connected to the crossbeam 5, a plurality of cleaning rollers 7 that abut against the outer circumferential surface of the screening drum 2 are rotatably connected to the mounting arms 6, the adjacent cleaning rollers 7 are transmission-connected and the cleaning roller 7 at the most side end is transmission-connected to the second motor 8 arranged on the bracket 3.

[0023] Specifically, the screening drum 2 is composed of a center frame 21 connected to a plurality of screening nets 22. The two ends of the center frame 21 are respectively rotatably connected to the two brackets 3 and are transmission-connected to the first motor 4. The transmission connection between the center frame 21 and the first motor 4 is realized by the cooperation of a sprocket and a chain. The screening net 22 is composed of two symmetrical screening half nets 221. The screening half net 221 is fixedly connected to the center frame 21 by a plurality of bolts passed through the ends.

[0024] Specifically, the cleaning roller 7 is a brush roller.

[0025] In the above embodiment, the plastic particles to be screened are fed into the screening drum 2 from the port of the screening drum 2, and the first motor 4 drives the screening drum 2 to rotate on the bracket 3. As the screening drum 2 rotates, the plastic particles in the screening drum 2 slide along the inclined direction of the screening drum 2 and are flipped by the stirring of the screening drum 2. Plastic particles of different sizes fall from the screening drum 2 through the sieve holes of different sizes of the screening nets 22 at different positions, thereby realizing the screening of the plastic particles. While the screening drum 2 rotates, the second motor 8 drives a plurality of cleaning rollers 7 to rotate. During the rotation of the cleaning rollers 7, the bristles of the cleaning rollers 7 continuously extend into the sieve holes of the screening net 22 and sweep across the surface of the screening net 22, thereby screening the plastic particles. During the screening process, the plastic particles stuck in the sieve holes of the screening net 22 are pushed back into the screening cylinder 2 for further screening or swept out of the sieve holes of the screening net 22 and fall along the outer circumferential surface of the screening net 22, thereby cleaning the sieve holes of the screening net 22, ensuring the passability of the screening net 22 and the screening effect, and no manual participation is required in the cleaning process of the screening net 22, saving manpower and improving production efficiency. The screening net 22 is divided into two screening half nets 221, which is convenient for disassembly and assembly of the screening net 22 and replacement of the screening net 22 with sieve holes of different sizes, and convenient for adjusting the screening net 22 according to the size of the plastic particles to be screened, so that the screening device has better applicability.

[0026] Preferably, the mounting arm 6 is fixedly connected with a material shifting rod 9 located on one side of the cleaning roller 7 and in contact with the circumferential surface of the cleaning roller 7. When the cleaning roller 7 is driven by the second motor 8 to rotate, the material shifting rod 9 shifts and drops the plastic particles stuck between the bristles of the cleaning roller 7 during the cleaning process, thereby ensuring the cleaning effect of the cleaning roller 7 on the sieve holes of the screening net 22.

[0027] Preferably, the mounting arm 6, cleaning roller 7, material removing rod 9 and second motor 8 are symmetrically arranged in two groups along the cross beam 5, and the two groups of cleaning rollers 7 are respectively driven to rotate by two second motors 8, so that the two groups of cleaning rollers 7 clean the screening drum 2 twice respectively, thereby improving the cleaning effect of the cleaning rollers 7 on the screening drum 2.

[0028] Preferably, a positioning plate 211 located between the ends of the two screening half nets 221 is fixedly connected to the center frame 21, and the ends of the screening half nets 221 are in conflict with the positioning plate 211. The positioning plates 211 are symmetrically provided with two corresponding to the two ends of the screening half nets 221. When the screening half nets 221 are replaced and installed and placed on the center frame 21, the ends of the screening half nets 221 are placed on the positioning plate 211 and in conflict with the positioning plate 211. The positioning plate 211 provides positioning for the screening half net 221, which facilitates the installation operation of the screening half net 221.

[0029] Furthermore, a support plate 10 is provided on the frame 1, one end of the support plate 10 is hinged to the frame 1, and the other end is hinged to the output shaft of the hydraulic cylinder 11 hinged to the frame 1, the bracket 3 is arranged on the support plate 10, and a drop port 101 located below the screening drum 2 is opened on the support plate 10.

[0030] In the above preferred embodiment, the inclination angle of the screening drum 2 can be adjusted by swinging the support plate 10 through the hydraulic cylinder 11, so that the screening drum 2 can select a suitable inclination angle according to the amount of plastic particles in the screening drum 2. That is, when the amount of plastic particles is large, the inclination angle of the screening drum 2 is reduced to slow down the sliding speed of the plastic particles in the screening drum 2 so that the plastic particles can be fully screened. When the amount of plastic particles is small, the inclination angle of the screening drum 2 is increased to ensure that the plastic particles can slide smoothly in the screening drum 2 for screening, so as to obtain the best screening effect.

[0031] Preferably, the width of the drop port 101 is smaller than the diameter of the screening mesh 22, and two recovery boxes 12 are provided on the support plate 10, which are respectively located on both sides of the drop port 101. When the cleaning roller 7 cleans the screening drum 2, the plastic particles falling along the outer circumferential surface of the screening drum 2 fall into the recovery box 12 instead of being mixed into the screened plastic particles through the drop port 101. This ensures the screening effect and facilitates the recovery of the plastic particles falling along the outer circumferential surface of the screening drum 2 for re-screening.

[0032] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A screening device for producing plastic particles, comprising a frame (1) and a screening drum (2), Features: The frame (1) is provided with two brackets (3) respectively located at the two ends of the screening drum (2); the two ends of the screening drum (2) are respectively rotatably connected to the two brackets (3) and are transmission-connected to the first motor (4); a crossbeam (5) located above the screening drum (2) is connected between the two brackets (3); a plurality of mounting arms (6) are fixedly connected to the crossbeam (5); a plurality of cleaning rollers (7) that abut against the outer circumferential surface of the screening drum (2) are rotatably connected to the mounting arms (6); adjacent cleaning rollers (7) are transmission-connected and the cleaning roller (7) at the most side end is transmission-connected to a second motor (8) arranged on the bracket (3).

2. A screening device for producing plastic particles according to claim 1, Features: The screening drum (2) is composed of a central frame (21) connected to a plurality of screening nets (22); the two ends of the central frame (21) are respectively rotatably connected to two brackets (3) and are transmission-connected to a first motor (4); the screening net (22) is composed of two symmetrical screening half nets (221) spliced ​​together; the screening half nets (221) are fixedly connected to the central frame (21) by a plurality of bolts passing through the ends.

3. A screening device for producing plastic particles according to claim 2, Features: The cleaning roller (7) is a brush roller.

4. A screening device for producing plastic particles according to claim 3, Features: The mounting arm (6) is fixedly connected to a material moving rod (9) which is located on one side of the cleaning roller (7) and contacts the circumferential surface of the cleaning roller (7).

5. A screening device for producing plastic particles according to claim 4, Features: The mounting arm (6), the cleaning roller (7), the material moving rod (9) and the second motor (8) are respectively arranged in two groups symmetrically along the crossbeam (5).

6. A screening device for producing plastic particles according to claim 5, Features: A positioning plate (211) located between the ends of the two screening half nets (221) is fixedly connected to the central frame (21), and the ends of the screening half nets (221) are in contact with the positioning plate (211).

7. A screening device for producing plastic particles according to claim 6, Features: A support plate (10) is provided on the frame (1), one end of the support plate (10) is hinged to the frame (1), and the other end is hinged to the output shaft of a hydraulic cylinder (11) hinged to the frame (1), the bracket (3) is provided on the support plate (10), and a material drop opening (101) is provided on the support plate (10) and is located below the screening drum (2).

8. A screening device for producing plastic particles according to claim 7, Features: The width of the material drop opening (101) is smaller than the diameter of the screening net (22), and the support plate (10) is provided with two recovery boxes (12) respectively located on two sides of the material drop opening (101).

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