Screening device for modified plastic production

Abstract

The utility model relates to the technical field of modified plastic screening, and discloses a screening device for modified plastic production, which comprises a fixing rod, a vibrating mechanism fixedly mounted on the side surface of the fixing rod, and a multi-stage screening mechanism fixedly mounted on the side surface of the fixing rod. Firstly, modified plastic needing to be screened is added into a feeding hopper, a driving motor is started to drive an eccentric wheel to rotate, vibration is generated, at the moment, the modified plastic firstly falls into a third screen plate, and large modified plastic is reserved through vibration and discharged through a discharging plate on the end face of the third screen plate; the smaller modified plastic passes through the grid plate and is added into the second sieve plate for secondary screening, at the moment, the smallest modified plastic passes through the second sieve plate, the larger modified plastic is reserved on the second sieve plate and is discharged through the discharging plate, and the smallest modified plastic is discharged through the discharging groove formed in the side face of the first sieve plate and the discharging plate, so that the three-stage screening operation of the modified plastic is completed. The automation degree of modified plastic screening can be improved, and the screening efficiency and the screening quality are improved.

Description

Technical Field

[0001] This utility model relates to the field of modified plastic screening technology, specifically a screening device for modified plastic production. Background Technology

[0002] Modified plastics refer to resin plastics obtained by adding suitable modifiers and modifying general-purpose plastics and engineering plastics through physical and chemical methods such as blending, filling, reinforcement, copolymerization, and crosslinking to improve their toughness, strength, tensile properties, impact resistance, flame retardancy, and other properties. During the production of modified plastics, impurities often get mixed into the plastic granules, affecting product quality and production efficiency. Therefore, screening is an indispensable part of the plastic granule production process. Commonly used screening equipment in the plastic granule production process includes vibrating screens, rotary screens, and linear screens.

[0003] Traditional screening devices are mostly used manually with screens. Workers pour modified plastics onto the screen and shake it to screen them. This screening method is not only inefficient and has poor screening effect, but the screening is also relatively coarse, which is not conducive to the subsequent production and processing of modified materials. In addition, manually shaking the screen is time-consuming and labor-intensive, resulting in very high labor costs.

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

[0005] The purpose of this invention is to provide a screening device for the production of modified plastics to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a screening device for modified plastic production, comprising a fixed rod, a vibration mechanism fixedly installed on the side of the fixed rod, and a multi-stage screening mechanism fixedly installed on the side of the fixed rod; the multi-stage screening mechanism includes a first screen plate, a second screen plate fixedly installed on the top surface of the first screen plate, a third screen plate fixedly installed on the top surface of the second screen plate, a top plate fixedly installed on the top surface of the third screen plate, a through groove extending vertically through the top plate, a feed hopper fixedly installed on the inner wall of the through groove, a sliding groove fixedly installed on the side of the feed hopper, a cover plate slidably installed on the inner wall of the sliding groove, a handle fixedly installed on the side of the cover plate, and a discharge trough fixedly installed on the bottom surface of the first screen plate.

[0007] Preferably, the vibration mechanism includes a protective shell, an mounting plate is fixedly installed on the inner wall of the protective shell, a servo motor is fixedly installed on the top surface of the mounting plate through a fixing plate, and a first gear is fixedly installed on the side of the servo motor transmission rod.

[0008] Preferably, the mounting plate has a through hole fixedly opened on its side, and a connecting rod is rotatably installed on the inner wall of the through hole through a bearing sleeve. A second gear is fixedly installed on the side of the connecting rod, and a first eccentric wheel is fixedly installed on the side of the connecting rod.

[0009] Preferably, a third gear is fixedly mounted on the side of the connecting rod, and a second eccentric wheel is fixedly mounted on the side of the connecting rod.

[0010] Preferably, the tooth surface of the first gear meshes with the tooth surfaces of the second and third gears, the protective shell has heat dissipation holes fixedly opened on its side, and the top surface of the protective shell is fixedly connected to the bottom surface of the first sieve plate.

[0011] Preferably, a mounting block is fixedly installed on the bottom end face of the fixed rod, a damping rod is fixedly installed on the bottom end face of the mounting block, a support base is fixedly installed on the bottom end face of the damping rod, and a return spring is fixedly installed between the top end face of the support base and the bottom end face of the mounting block, with the return spring sleeved on the outside of the damping rod.

[0012] Preferably, an anti-slip pad is fixedly installed on the bottom surface of the support base, and reinforcing ribs are fixedly installed on the side of the support base.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] 1) This screening device for modified plastic production first requires gripping the handle and pulling it outward to open the cover plate. The modified plastic to be screened is then added to the feeding hopper. At this point, the drive motor rotates the first and second eccentric wheels, generating vibration. This vibration is further transmitted to the inside of the first screen plate, causing the second and third screen plates to vibrate. The modified plastic first falls into the third screen plate, and the vibration retains the larger pieces, which are then discharged through the discharge plate on the end face of the third screen plate. The smaller pieces pass through the grid plate and enter the second screen plate for secondary screening. The smallest pieces pass through the second screen plate, while the relatively larger pieces remain on the second screen plate and are discharged through the discharge plate. The smallest pieces are discharged through the discharge chute and discharge plate on the side of the first screen plate, completing the three-stage screening of the modified plastic. This improves the automation level, efficiency, and quality of the screening process.

[0015] 2) The screening device for modified plastic production starts with a servo motor that drives the first gear to rotate. The first gear then drives the second and third gears that mesh with it to rotate, which in turn drives the first eccentric wheel, which is coaxially mounted with the second gear, to rotate. This, in turn, drives the second eccentric wheel, which is coaxially mounted with the third gear, to rotate, causing regular vibrations. These vibrations are transmitted to the screening mechanism for screening. During the vibration, a return spring and a damping rod are used to adapt to the small displacement caused by the vibration, reducing damage to the equipment and noise generated during vibration, thereby extending the service life of the device. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of a screening device for modified plastic production according to an embodiment of the present utility model;

[0017] Figure 2 This is a bottom view of the structure in an embodiment of this utility model;

[0018] Figure 3 This is a schematic diagram of the multi-stage screening mechanism in an embodiment of the present invention;

[0019] Figure 4 This is a schematic diagram of the protective shell structure in an embodiment of the present utility model;

[0020] Figure 5 This is a schematic diagram of the vibration mechanism in an embodiment of the present invention.

[0021] In the diagram: 1. Fixed rod; 2. Vibration mechanism; 201. Mounting block; 202. Return spring; 203. Damping rod; 204. Support base; 205. Protective shell; 206. Heat dissipation hole; 207. Mounting plate; 208. Servo motor; 209. First gear; 210. Second gear; 211. First eccentric wheel; 212. Third gear; 213. Second eccentric wheel; 3. Multi-stage screening mechanism; 301. First screen plate; 302. Discharge chute; 303. Second screen plate; 304. Third screen plate; 305. Top plate; 306. Feed hopper; 307. Slide chute; 308. Cover plate; 309. Handle; 4. Reinforcing rib. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model. Example

[0023] Combination Figures 1-5A screening device for modified plastic production includes a fixed rod 1, a vibration mechanism 2 fixedly installed on the side of the fixed rod 1, and a multi-stage screening mechanism 3 fixedly installed on the side of the fixed rod 1. The multi-stage screening mechanism 3 includes a first screen plate 301, a second screen plate 303 fixedly installed on the top surface of the first screen plate 301, a third screen plate 304 fixedly installed on the top surface of the second screen plate 303, a top plate 305 fixedly installed on the top surface of the third screen plate 304, a through groove extending vertically through the top plate 305, a feed hopper 306 fixedly installed on the inner wall of the through groove, a sliding groove 307 fixedly installed on the side of the feed hopper 306, a cover plate 308 slidably installed on the inner wall of the sliding groove 307, a handle 309 fixedly installed on the side of the cover plate 308, and a discharge chute 302 fixedly installed on the bottom surface of the first screen plate 301.

[0024] Specifically, in use, first grip the handle 309 and pull it outwards. This causes the cover plate 308 to slide along the groove 307, opening the cover plate 308. Then, add the modified plastic to be screened and classified into the feed hopper 306. At this point, the servo motor 208 is activated, driving the first eccentric wheel 211 and the second eccentric wheel 213 to rotate, generating vibration. This vibration is further transmitted through the protective shell 205 to the inside of the first screen plate 301, causing the first screen plate 301 to vibrate the second screen plate 303 and the third screen plate 304. At this point, the modified plastic first falls into the third screen plate 304, and the larger modified plastic is retained by vibration and discharged through the discharge plate on the end face of the third screen plate 304. The smaller ones pass through the grid plate and enter the second screen plate 303 for secondary screening. At this point, the smallest modified plastic passes through the second screen plate 303, the relatively larger ones are retained on the second screen plate 303 and discharged through the discharge plate, and the smallest ones are discharged through the discharge chute 302 and discharge plate opened on the side of the first screen plate 301, thus completing the three-stage screening operation of the modified plastic. Example

[0025] See Figures 1-5Furthermore, the vibration mechanism 2 includes a protective shell 205. A mounting plate 207 is fixedly installed on the inner wall of the protective shell 205. A servo motor 208 is fixedly installed on the top surface of the mounting plate 207 via a fixing plate. A first gear 209 is fixedly installed on the side of the transmission rod of the servo motor 208. A through hole is fixedly opened on the side of the mounting plate 207. A connecting rod is rotatably installed on the inner wall of the through hole via a bearing sleeve. A second gear 210 is fixedly installed on the side of the connecting rod. A first eccentric wheel 211 is fixedly installed on the side of the connecting rod. A third gear 212 is fixedly installed on the side of the connecting rod. A second eccentric wheel 213 is fixedly installed on the side of the connecting rod. The tooth surface of the first gear 209 meshes with the tooth surfaces of the second gear 210 and the third gear 212. A heat dissipation hole 206 is fixedly opened on the side of the protective shell 205. The top surface of the protective shell 205 is fixedly connected to the bottom surface of the first sieve plate 301. An installation block 201 is fixedly installed on the bottom surface of the fixing rod 1. A damping rod 203 is fixedly installed on the bottom surface of the installation block 201. A support base 204 is fixedly installed on the bottom surface of the damping rod 203. A return spring 202 is fixedly installed between the top surface of the support base 204 and the bottom surface of the installation block 201. The return spring 202 is sleeved on the outside of the damping rod 203. An anti-slip pad is fixedly installed on the bottom surface of the support base 204. A reinforcing rib 4 is fixedly installed on the side of the support base 204.

[0026] Specifically, after the modified plastic to be screened is poured into the feed hopper 306, the servo motor 208 is turned on. The servo motor 208 drives the first gear 209 mounted on the end face of the transmission rod to rotate. Then, the first gear 209 drives the second gear 210 and the third gear 212 meshing with it to rotate. Simultaneously, the first eccentric wheel 211, which is coaxially mounted with the second gear 210, rotates, and the second eccentric wheel 213, which is coaxially mounted with the third gear 212, rotates, causing them to generate regular vibrations. The vibrations are transmitted to the screening mechanism for screening. At the same time, the small displacement caused by the vibration is adapted by the return spring 202 and the damping rod 203 to reduce damage to the equipment and extend the service life of the device.

[0027] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A screening device for modified plastic production, comprising a fixed rod (1), characterized in that: A vibration mechanism (2) is fixedly installed on the side of the fixed rod (1), and a multi-stage screening mechanism (3) is fixedly installed on the side of the fixed rod (1). The multi-stage screening mechanism (3) includes a first screen plate (301), a second screen plate (303) fixedly installed on the top surface of the first screen plate (301), a third screen plate (304) fixedly installed on the top surface of the second screen plate (303), a top plate (305) fixedly installed on the top surface of the third screen plate (304), a through groove opened vertically through the top plate (305), a feed hopper (306) fixedly installed on the inner wall of the through groove, a sliding groove (307) fixedly opened on the side of the feed hopper (306), a cover plate (308) slidably installed on the inner wall of the sliding groove (307), a handle (309) fixedly installed on the side of the cover plate (308), and a discharge groove (302) fixedly opened on the bottom surface of the first screen plate (301).

2. The screening device for modified plastics production according to claim 1, characterized in that: The vibration mechanism (2) includes a protective shell (205), an installation plate (207) is fixedly installed on the inner wall of the protective shell (205), a servo motor (208) is fixedly installed on the top surface of the installation plate (207) through a fixing plate, and a first gear (209) is fixedly installed on the side of the transmission rod of the servo motor (208).

3. A screening device for modified plastics production according to claim 2, characterized in that: The mounting plate (207) has a through hole fixedly opened on its side. A connecting rod is rotatably installed on the inner wall of the through hole through a bearing sleeve. A second gear (210) is fixedly installed on the side of the connecting rod, and a first eccentric wheel (211) is fixedly installed on the side of the connecting rod.

4. A screening device for modified plastics production according to claim 3, characterized in that: A third gear (212) is fixedly installed on the side of the connecting rod, and a second eccentric wheel (213) is fixedly installed on the side of the connecting rod.

5. A screening device for modified plastics production according to claim 2, characterized in that: The tooth surface of the first gear (209) meshes with the tooth surfaces of the second gear (210) and the third gear (212). The protective shell (205) has a heat dissipation hole (206) fixedly opened on its side. The top surface of the protective shell (205) is fixedly connected to the bottom surface of the first sieve plate (301).

6. A screening device for modified plastics production according to claim 1, characterized in that: A mounting block (201) is fixedly installed on the bottom end face of the fixed rod (1). A damping rod (203) is fixedly installed on the bottom end face of the mounting block (201). A support base (204) is fixedly installed on the bottom end face of the damping rod (203). A return spring (202) is fixedly installed between the top end face of the support base (204) and the bottom end face of the mounting block (201). The return spring (202) is sleeved on the outside of the damping rod (203).

7. A screening device for modified plastics production according to claim 6, characterized in that: The bottom surface of the support base (204) is fixedly equipped with an anti-slip pad, and the side surface of the support base (204) is fixedly equipped with a reinforcing rib (4).

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