Screening mechanism for plastic pulverizer

Abstract

The utility model discloses a screening mechanism for a plastic pulverizer, which relates to the technical field of material screening and comprises a machine body, a plurality of groups of filter plates are horizontally and movably mounted in the machine body, and a crank connecting rod assembly for driving the filter plates to move is fixedly mounted on the side wall of any one of the left side and the right side of the machine body. A scraping assembly is arranged above each group of filter plates and comprises a plurality of groups of scraping plates, and the front ends and the rear ends of the plurality of groups of scraping plates are connected with one another through transverse plates. According to the design scheme, the crank connecting rod assembly drives the filter plate to move, and the filter plate is always connected with the crank connecting rod assembly in the horizontal reciprocating motion process, so that the impact on the filter plate when materials are screened is reduced, the service life of the filter plate is prolonged, and the filter plate is prevented from being damaged when the filter plate horizontally reciprocates. Materials in the filter plate are scooped up through the scraping plate, so that the materials vibrate up and down, and the screening efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of material screening, in particular to a screening mechanism for a plastic grinding machine. Background Art

[0002] Plastic grinding machines are widely used in the grinding of various plastic materials in the fields of chemical industry, waste recycling, plastic pipe profile manufacturing, plastic modification, etc. According to the grinding principle, grinding machines are mainly divided into two categories: rotor (turbine) grinding machines and disc grinding machines. According to the grinding method, they are divided into normal temperature grinding machines and cryogenic grinding machines. The most common ones are normal temperature grinding machines, also known as mechanical crushing. Plastic grinding machines need to be screened after crushing in order to better control the quality of the products.

[0003] CN 219985409 U discloses a screening mechanism for a plastic grinding machine, comprising a machine body, a feed pipe fixedly mounted on the top of the machine body, the feed pipe inserted into the interior of the machine body, a first filter plate arranged inside the machine body, a second filter plate arranged inside the machine body and below the first filter plate, a mounting plate fixedly mounted on one side of the machine body and between the first filter plate and the second filter plate, a motor fixedly mounted on the top of the mounting plate, a rotating shaft fixedly mounted on the output shaft of the motor, and a cam fixedly mounted on the top of the rotating shaft; the screening mechanism filters materials by arranging two filter plates with different mesh sizes inside the machine body and making them perform horizontal reciprocating motion, the shell of the machine body plays a good blocking effect, thereby preventing the phenomenon that materials fall off the filter plate when a large amount of materials are placed.

[0004] However, when the above-mentioned screening mechanism drives the filter plate to move horizontally back and forth through the cam, the cam will cause impact on the filter plate. After working for a long time, the cam and the filter plate are easily damaged. In addition, the screening is only performed by horizontal movement of the filter plate, and the screening effect is poor, resulting in low screening efficiency. Utility Model Content

[0005] In order to overcome the above-mentioned defects in the prior art, the utility model provides a screening mechanism for a plastic grinding mill.

[0006] The technical solution adopted by the utility model to solve its technical problems is: a screening mechanism for a plastic grinding mill, comprising a machine body, wherein a plurality of groups of filter plates are horizontally and movably installed inside the machine body, a crank connecting rod assembly for driving the filter plates to move is fixedly installed on the side wall on either the left or right side of the machine body, a scraper assembly is arranged above each group of the filter plates, the scraper assembly comprises a plurality of groups of scrapers, the front and rear ends of the plurality of groups of the scrapers are connected to each other by a cross plate, baffle plates are fixedly installed on the left and right ends of the cross plate, and the baffle plates are movably installed on the inner wall of the machine body.

[0007] Furthermore, a plurality of groups of sliding sleeves are fixedly installed on the left and right side walls of the body, the number of the plurality of sliding sleeves corresponds to the number of filter plates, the left and right ends of the filter plates are provided with bosses that cooperate with the sliding sleeves, the bosses are installed in the sliding sleeves, a connecting plate is provided on the side of the body away from the crank-connecting rod assembly, and the connecting plate is fixedly installed on each group of bosses.

[0008] Furthermore, the crank-connecting rod assembly includes a protective cover, a crank rocker is rotatably mounted on the inner wall of the protective cover, a servo motor is fixedly mounted on the outer wall of the protective cover, a power output shaft of the servo motor is cooperatively connected with the rotating shaft of the crank rocker, a connecting rod is hinged on the crank rocker, and the other end of the connecting rod is hinged to any group of bosses.

[0009] Furthermore, there are several groups of slide grooves on the inner walls on the left and right sides of the body, and baffle plates are slidably installed in the slide grooves. Each group of adjacent baffle plates is connected to each other through a transmission plate. A push plate is fixedly installed on the top of the top baffle plate, and a cylinder is fixedly installed on the top of the body, and the push rod of the cylinder is fixedly connected to the push plate.

[0010] Furthermore, the bottom ends of the scrapers of the plurality of groups are arranged to be inclined toward the middle of the machine body, and a filter screen is fixedly mounted on the lower end of the filter plate, and the filter screen abuts against the bottom ends of the scrapers.

[0011] Furthermore, a feed hopper is fixedly mounted on the top of the machine body, and a plurality of groups of hatches are movably mounted on the front side wall of the machine body, and the positions of the plurality of groups of hatches correspond to the filter plates.

[0012] The beneficial effect of the utility model is that the design of the utility model drives the movement of the filter plate through the crank connecting rod assembly, and the filter plate is always connected to the crank connecting assembly during the horizontal reciprocating movement, thereby reducing the impact on the filter plate when screening the material, and improving the service life of the filter plate; and when the filter plate moves horizontally reciprocatingly, the scraper scoops the material from the filter plate, so that the material vibrates up and down, thereby improving the screening efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0014] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;

[0015] Figure 2 It is the front view of the utility model;

[0016] Figure 3 It is a right side view of the utility model;

[0017] Figure 4 for Figure 3 Schematic diagram of the cross-sectional structure in the AA direction;

[0018] Figure 5 for Figure 4 Schematic diagram of the cross-sectional structure in the middle BB direction;

[0019] Figure 6 for Figure 5 A partial enlarged view of the middle C area.

[0020] In the figure: 1. body, 2. filter plate, 3. filter screen, 4. sleeve, 5. boss, 6. connecting plate, 7. protective cover, 8. crank rocker, 9. servo motor, 10. connecting rod, 11. slide, 12. material baffle plate, 13. transmission plate, 14. push plate, 15. cylinder, 16. cross plate, 17. scraper, 18. feed hopper, 19. hatch. DETAILED DESCRIPTION

[0021] In order to more clearly illustrate the technical solution of the utility model, the utility model is further described below in conjunction with the accompanying drawings. Obviously, the accompanying drawings described below are only one embodiment of the utility model. For ordinary technicians in this field, without paying any creative work, other embodiments can be obtained based on this drawing and embodiment, which all belong to the protection scope of the utility model.

[0022] according to Figure 1-6 As shown, a screening mechanism for a plastic grinding mill comprises a machine body 1, wherein a plurality of groups of filter plates 2 are horizontally and movably mounted inside the machine body 1, wherein the number of the filter plates 2 is preferably three groups, and a crank connecting rod assembly for driving the filter plates 2 to move is fixedly mounted on the left side wall of the machine body 1, and a scraper assembly is arranged above each group of filter plates 2, wherein the scraper assembly comprises a plurality of groups of scrapers 17, and the front and rear ends of the plurality of groups of scrapers 17 are connected to each other through a transverse plate 16, and baffle plates 12 are fixedly mounted on the left and right ends of the transverse plate 16, and the baffle plates 12 are movably mounted on the inner wall of the machine body 1.

[0023] In this embodiment, a plurality of sets of sleeves 4 are fixedly mounted on the left and right side walls of the machine body 1, and the number of the plurality of sleeves 4 corresponds to the number of the filter plates 2. The left and right ends of the filter plates 2 are provided with bosses 5 that cooperate with the sleeves 4, and the bosses 5 are slidably mounted in the sleeves 4. A connecting plate 6 is provided on the side of the machine body 1 away from the crank-connecting rod assembly, and the connecting plate 6 is fixedly mounted on each set of bosses 5 by bolts. When one set of filter plates 2 moves, the other filter plates 2 are driven to move synchronously through the connecting plate 6.

[0024] In this embodiment, the crank-connecting rod assembly includes a protective cover 7, a crank rocker 8 is rotatably mounted on the inner wall of the protective cover 7, a servo motor 9 is fixedly mounted on the outer wall of the protective cover 7, a power output shaft of the servo motor 9 is connected to the rotating shaft of the crank rocker 8 through a coupling, a connecting rod 10 is hinged on the crank rocker 8, and the other end of the connecting rod 10 is hinged to the topmost boss 5. The crank rocker 8 is driven to rotate by the servo motor 9, and the filter plate 2 is driven to reciprocate laterally through the connecting rod 10 under the action of the crank rocker 8.

[0025] In this embodiment, there are several groups of slide grooves 11 on the inner walls on the left and right sides of the body 1, and baffle plates 12 are slidably installed in the slide grooves 11. Each group of adjacent baffle plates 12 are connected to each other by a transmission plate 13. A push plate 14 is fixedly installed on the top of the top baffle plate 12, and a cylinder 15 is fixedly installed on the top of the body 1. The push rod of the cylinder 15 is fixedly connected to the push plate 14. The push plate 14 is driven to rise and fall inside the body 1 by the cylinder 15. Under the action of the push plate 14, the top baffle plate 12 moves up and down along the slide groove 11, and the power is transmitted to the baffle plate 12 below through the transmission plate 13.

[0026] In this embodiment, the bottom ends of several groups of scrapers 17 are inclined toward the middle of the machine body 1, and the filter screen 3 is fixedly installed at the lower end of the filter plate 2. The filter screen 3 abuts against the bottom end of the scraper 17. When the filter plate 2 moves horizontally back and forth, the scraper 17 scoops the material from the filter screen 3, thereby causing the material to vibrate up and down.

[0027] In this embodiment, a feed hopper 18 is fixedly installed on the top of the body 1, and several groups of hatches 19 are movably installed on the front side wall of the body 1. The positions of the several groups of hatches 19 correspond to the filter plates 2. After the filtration is completed, the operator opens the hatches 19 to take the materials out of the body 1.

[0028] When the utility model is in use, materials are put into the machine body 1 through the feed hopper 18, and the materials fall on the filter screen 3 of the uppermost filter plate 2. Then, the servo motor 9 is started, and the servo motor 9 drives the crank rocker 8 to rotate. The crank rocker 8 makes all the filter plates 2 move back and forth laterally through the connecting rod 10, thereby reducing the impact on the filter plates 2 when screening the materials and improving the service life of the filter plates 2. At the same time, the push rod of the cylinder 15 is pushed out to make the scraper 17 abut against the filter screen 4, and the materials are shoveled from the filter screen 3 by the scraper 17, so that the materials vibrate up and down, which effectively improves the screening efficiency. After the material screening is completed, the operator opens the hatch 19 to take the materials out of the machine body 1.

[0029] The above embodiments are only exemplary embodiments of the present invention and are not intended to limit the present invention. The protection scope of the present invention is defined by the claims. Those skilled in the art may make various modifications or equivalent substitutions to the present invention within the essence and protection scope of the present invention, and such modifications or equivalent substitutions shall also be deemed to fall within the protection scope of the present invention.

Claims

1. A screening mechanism for a plastic grinding machine, comprising a body (1), characterized in that: A plurality of groups of filter plates (2) are movably mounted horizontally inside the machine body (1); a crank connecting rod assembly for driving the filter plates (2) to move is fixedly mounted on the side wall on either the left or right side of the machine body (1); a scraper assembly is arranged above each group of filter plates (2); the scraper assembly comprises a plurality of groups of scrapers (17); the front and rear ends of the plurality of groups of scrapers (17) are connected to each other via a transverse plate (16); baffle plates (12) are fixedly mounted on the left and right ends of the transverse plate (16); the baffle plates (12) are movably mounted on the inner wall of the machine body (1).

2. A screening mechanism for a plastic grinding mill according to claim 1, characterized in that: A plurality of groups of sliding sleeves (4) are fixedly mounted on the left and right side walls of the machine body (1), the number of the plurality of groups of sliding sleeves (4) corresponding to the number of filter plates (2), the left and right ends of the filter plates (2) are provided with bosses (5) matching with the sliding sleeves (4), the bosses (5) are matched and mounted in the sliding sleeves (4), and a connecting plate (6) is provided on the side of the machine body (1) away from the crank connecting rod assembly, the connecting plate (6) is fixedly mounted on each group of bosses (5).

3. A screening mechanism for a plastic grinding mill according to claim 2, characterized in that: The crank-connecting rod assembly comprises a protective cover (7), a crank rocker (8) is rotatably mounted on the inner wall of the protective cover (7), a servo motor (9) is fixedly mounted on the outer wall of the protective cover (7), a power output shaft of the servo motor (9) is cooperatively connected to the rotating shaft of the crank rocker (8), a connecting rod (10) is hinged on the crank rocker (8), and the other end of the connecting rod (10) is hinged to any group of bosses (5).

4. A screening mechanism for a plastic grinding mill according to claim 1, characterized in that: A plurality of groups of slide grooves (11) are provided on the inner walls on the left and right sides of the machine body (1), and baffle plates (12) are slidably installed in the slide grooves (11). Each group of adjacent baffle plates (12) are connected to each other via a transmission plate (13), and a push plate (14) is fixedly installed on the top of the top baffle plate (12). A cylinder (15) is fixedly installed on the top of the machine body (1), and a push rod of the cylinder (15) is fixedly connected to the push plate (14).

5. A screening mechanism for a plastic grinding mill according to claim 4, characterized in that: The bottom ends of the plurality of groups of scrapers (17) are arranged obliquely toward the middle of the machine body (1); a filter screen (3) is fixedly mounted on the lower end of the filter plate (2); and the filter screen (3) abuts against the bottom ends of the scrapers (17).

6. A screening mechanism for a plastic grinding mill according to any one of claims 1 to 5, characterized in that: A feed hopper (18) is fixedly mounted on the top of the machine body (1), and a plurality of groups of hatches (19) are movably mounted on the front side wall of the machine body (1), wherein the positions of the plurality of groups of hatches (19) correspond to the filter plates (2).

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