Plastic particle sizing apparatus with easy-to-change screen

Abstract

This utility model relates to the field of plastic particle screening and discloses a plastic particle grading device with easy-to-replace screens. It includes a base, a support frame elastically connected to the base via an elastic element, a vibrating motor fixedly connected to the support frame, and a hopper fixedly connected to the bottom of the support frame. The support frame contains two screen plates for grading and screening particles. A disassembly assembly is provided on the support frame for disassembling and assembling the two screen plates. An adjustment mounting component is provided on the first screen plate for adjusting and installing the two screen plates. An installation groove is provided on the support frame. In this utility model, a plug-in positioning frame and a rotating screw are used to achieve quick disassembly and assembly of the two sets of screens, simplifying maintenance steps. The distance between the two sets of screen plates can be flexibly adjusted via a plug and a through hole, enabling dual-mode screen plate replacement and improving grading efficiency and the flexibility of replacement operations.

Description

Technical Field

[0001] This utility model relates to the field of plastic particle screening, and in particular to a plastic particle grading device that facilitates screen replacement. Background Technology

[0002] The core purpose of plastic granule screening is to control the consistency and purity of product particle size to meet the requirements of downstream processing technology and the quality standards of the final product. Screening can remove impurities mixed in the granules, preventing them from damaging equipment or causing defects in products during injection molding, extrusion and other molding processes. At the same time, it can classify the granules according to different particle size ranges to ensure that the particle size entering the molding machine is uniform. This ensures that the material is conveyed, melted and plasticized at a consistent speed in the screw, reducing problems such as uneven wall thickness and surface shrinkage caused by particle size differences. This is especially important for high-precision products.

[0003] For the most commonly used vibrating screens and rotary vibrating screens, loosen the ring-shaped fastening bolts on the screen cover to remove the screen cover. After removing the pressure ring, take out the old screen from the screen frame slot and clean the slot of impurities. When installing the new screen, lay it flat and embed it into the slot to ensure there are no wrinkles. Cover the screen and tighten all bolts evenly to avoid uneven local stress. For linear screens, loosen the tension bolts on both sides first, and then pull the old screen from the feed end to the discharge end. When installing the new screen, first fix the feed end slot and clips, stretch it towards the discharge end until it is flat and without looseness, and then fix the discharge end clips. Finally, tighten the bolts to check the tension uniformity.

[0004] In existing technologies, the traditional fixing method of bolting the screen cover and the pressure ring or bolt tensioning strip is commonly used. This not only requires loosening or tightening multiple bolts one by one, making the disassembly and assembly process cumbersome and time-consuming, but also easily leads to uneven bolt stress causing the screen to not fit tightly or wrinkles. At the same time, the screen plate spacing of traditional devices is mostly fixed and cannot be flexibly adjusted according to the particle size and characteristics of plastic particles. During the screening process, improper spacing can easily cause particles to bridge and accumulate on the screen surface, affecting material flow and grading efficiency. Therefore, a plastic particle grading device that facilitates screen replacement is proposed to solve the above problems. Utility Model Content

[0005] To overcome the above shortcomings, this utility model provides a plastic particle grading device with easy screen replacement, which aims to improve the problems of cumbersome and time-consuming screen disassembly and assembly steps, inflexible screen plate spacing leading to particle bridging, and low grading efficiency in existing plastic particle grading devices with easy screen replacement.

[0006] To achieve the above objectives, this utility model adopts the following technical solution: a plastic particle grading device that facilitates screen replacement, including...

[0007] The base has a support frame elastically connected to it via an elastic element. A vibration motor is fixedly connected to the support frame. A hopper is fixedly connected to the bottom of the support frame. The support frame is equipped with a sieve plate one and a sieve plate two for grading and screening particles.

[0008] A disassembly and assembly assembly is mounted on a bracket and is used to disassemble and assemble sieve plate one and sieve plate two.

[0009] An adjustment mounting component is provided on screen plate one, and the adjustment mounting component is used for adjusting and installing screen plate one and screen plate two.

[0010] As a further description of the above technical solution:

[0011] The bracket has a slot, and the assembly / disassembly assembly includes a positioning frame, a screw, and an elongated plate. The positioning frame is fixed on the screen plate, the slot is inserted into the positioning frame, the screw is threaded onto the positioning frame, and the elongated plate is fixed onto the screw.

[0012] As a further description of the above technical solution:

[0013] The adjusting mounting component includes four sets of rectangular frames arranged in a rectangular array, which are fixed on the screen plate. Several sets of through holes are opened on the rectangular frames. Insert rods are inserted into the rectangular frames. The insert rods are provided with mounting grooves. A connecting rod is slidably connected through the insert rods. A spring is fixedly connected to the connecting rod.

[0014] As a further description of the above technical solution:

[0015] The connecting rod is adapted to the through hole, and the end of the spring away from the connecting rod is fixed in the mounting groove.

[0016] As a further description of the above technical solution:

[0017] The top end of the insertion rod is hinged to the sieve plate.

[0018] As a further description of the above technical solution:

[0019] A through groove is provided on the second sieve plate. A control rod is fixedly connected to the connecting rod. A connecting buckle is fixedly connected to the second sieve plate. A silicone sleeve with holes is fixedly connected to the control rod.

[0020] As a further description of the above technical solution:

[0021] The through slot is fitted outside the control rod.

[0022] As a further description of the above technical solution:

[0023] The holes on the silicone sleeve are adapted to the connecting buckle.

[0024] This utility model has the following beneficial effects:

[0025] 1. In this utility model, by using a plug-in positioning frame and a rotating screw, the two sets of screens can be quickly disassembled and assembled, simplifying the maintenance steps. The distance between the two sets of screen plates can be flexibly adjusted by the plug rod and through hole to avoid bridging of particles during screening. At the same time, screen plate two can be disassembled separately to realize dual-mode replacement of screen plates, improving grading efficiency and the flexibility of replacement operation.

[0026] 2. In this utility model, the height of the second sieve plate can be conveniently adjusted and locked by the cooperation of the control rod and the through groove. The locking mechanism composed of the silicone sleeve and the connecting buckle can effectively prevent accidental loosening caused by vibration, ensure the stability of the screening process, make the screen spacing adjustment operation simple and intuitive, improve the reliability of equipment operation and screening accuracy, and reduce the difficulty of maintenance. Attached Figure Description

[0027] Figure 1 This is a right-side view of the main structure of the plastic particle grading device for easy screen replacement proposed in this utility model.

[0028] Figure 2 This is a bottom view of the main structure of the plastic particle grading device for easy screen replacement proposed in this utility model.

[0029] Figure 3 This is a top view schematic diagram of the main structure of the plastic particle grading device for easy screen replacement proposed in this utility model.

[0030] Figure 4 This is a top view of a partial structural separation of the plastic particle grading device for easy screen replacement proposed in this utility model.

[0031] Figure 5 The present invention provides a plastic particle grading device with easily replaceable screens. Figure 4 Enlarged view of region A in the middle;

[0032] Figure 6 This is a bottom view of the sieve plate structure of the plastic particle grading device for easy sieve replacement proposed in this utility model.

[0033] Figure 7 The present invention provides a plastic particle grading device with easily replaceable screens. Figure 6 Enlarged schematic diagram of region B in the middle.

[0034] Legend:

[0035] 1. Base; 2. Elastic component; 3. Bracket; 4. Vibration motor; 5. Hopper; 6. Slot; 7. Positioning frame; 8. Screw; 9. Long cylindrical plate; 10. Screen plate one; 11. Rectangular frame; 12. Through hole; 13. Mounting groove; 14. Insert rod; 15. Connecting rod; 16. Spring; 17. Screen plate two; 18. Control rod; 19. Through groove; 20. Connecting buckle; 21. Silicone sleeve. Detailed Implementation

[0036] 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.

[0037] Reference Figures 1-3 The present invention provides an embodiment of a plastic particle grading device that facilitates screen replacement. The device includes a base 1, on which a support 3 is elastically connected via elastic elements 2. The support 3 is a rectangular frame with an open top and bottom. An inwardly protruding support step is integrally formed on its inner wall to support the edge of the first screen plate 10. The support 3 is elastically connected to the base 1 via multiple elastic elements 2, such as spring shafts. A vibration motor 4 is fixedly installed on the outside of the support 3 to drive the entire support 3 and the internal screen plates to vibrate. The vibration motor 4 is fixedly connected to the support 3. A hopper 5 is fixedly connected to the bottom of the support 3, located directly below the first screen plate 10 and the second screen plate 17, to uniformly collect qualified particles that have fallen after grading and screening. The support 3 contains the first screen plate 10 and the second screen plate 17 for grading and screening the particles. The two layers of screens with different apertures achieve coarse and fine grading of the plastic particles, improving the screening accuracy.

[0038] Reference Figures 3-5 The bracket 3 has a slot 6 and a disassembly assembly. The disassembly assembly is used to disassemble and assemble the first screen plate 10 and the second screen plate 17. The disassembly assembly includes a positioning frame 7, a screw 8 and an elongated plate 9. The positioning frame 7 is fixed on the first screen plate 10. The slot 6 is inserted into the positioning frame 7, using a plug-in type fit, so that the positioning frame 7 can be quickly inserted into or removed from the slot 6, simplifying the installation steps. The screw 8 is threaded onto the positioning frame 7. By rotating the screw 8, the elongated plate 9 can be moved axially to adjust the relative position of the elongated plate 9 and the positioning frame 7. The elongated plate 9 is fixed on the screw 8. When the elongated plate 9 and the positioning frame 7 are in a cross shape, the length of the elongated plate 9 is greater than the width of the slot 6. The elongated plate 9 is laterally locked on the outside of the bracket 3, forming an axial limit on the positioning frame 7 to prevent the positioning frame 7 from coming out of the slot 6. The length direction of the elongated plate 9 is consistent with the width direction of the slot 6. Releasing the limit on the positioning frame 7 makes it easy to remove the entire screen plate.

[0039] Reference Figures 5-7 The sieve plate 10 is equipped with an adjustable mounting component, which can flexibly change the vertical distance between the sieve plate 2 (17) and the sieve plate 10 according to actual screening needs, adapting to the stratified screening requirements of different particles. The adjustable mounting component is used to adjust the installation of the sieve plate 10 and the sieve plate 2 (17). The adjustable mounting component includes four sets of rectangular frames 11 arranged in a rectangular array fixed on the sieve plate 10. The four sets of rectangular frames 11 are located at the four corners of the sieve plate 10, providing balanced support for the sieve plate 2 (17) and preventing deformation due to uneven force. Several sets of through holes 12 are opened on the rectangular frames 11, which are evenly distributed along the height direction of the rectangular frames 11, providing multiple height fixing points for the insertion rod 14. The insertion rod 14 is inserted into the rectangular frame 11 and can slide up and down within the rectangular frame 11, thereby driving the sieve plate 2 (17) to adjust its height. The top of the insert rod is hinged to the second screen plate 17. The hinge structure allows the second screen plate 17 to swing slightly during vibration, increasing the frequency of particle tumbling on the screen surface and reducing screen hole clogging. The insert rod 14 has an installation groove 13. A connecting rod 15 is slidably connected through the insert rod 14. The connecting rod 15 can slide horizontally in the installation groove 13. The height of the insert rod 14 is fixed by inserting it into the through holes 12 at different heights. The connecting rod 15 is adapted to the through holes 12. The two are precisely matched in size to ensure that the connecting rod 15 will not loosen after being inserted into the through holes 12, thus ensuring the height of the second screen plate 17 is stable. A spring 16 is fixedly connected to the connecting rod 15. The end of the spring 16 away from the connecting rod 15 is fixed in the installation groove 13. Fixing both ends of the spring 16 ensures that the spring 16 will not shift during the extension and contraction process, and continuously provides stable elastic force to the connecting rod 15.

[0040] Reference Figures 5-7 A through groove 19 is provided on the second sieve plate 17. The length of the through groove 19 is greater than the adjustment stroke of the control rod 18, providing sufficient space for the movement of the control rod 18. The control rod 18 is fixedly connected to the connecting rod 15. The operator can slide the connecting rod 15 by moving the control rod 18, thereby separating the connecting rod 15 from the through hole 12, which facilitates the adjustment of the height of the insertion rod 14. The through groove 19 is sleeved on the outside of the control rod 18. A connecting buckle 20 is fixedly connected to the second sieve plate 17. A silicone sleeve 21 with holes is fixedly connected to the control rod 18. The silicone sleeve 21 has good elasticity and wear resistance. Its holes can be tightly fastened with the connecting buckle 20. The holes on the silicone sleeve 21 are adapted to the connecting buckle 20. After the height of the second sieve plate 17 is adjusted, the holes of the silicone sleeve 21 are fastened to the connecting buckle 20 to fix the position of the control rod 18 and prevent the connecting rod 15 from dislodging from the through hole 12 due to vibration.

[0041] Working principle: First, adjust the distance between screen plate 17 and screen plate 10 by adjusting the mounting parts. The operator moves the control lever 18 outward, causing the connecting rod 15 to compress the spring 16 and exit from the through hole 12 of the rectangular frame 11. This allows the insertion rod 14 to move up and down to change the height of screen plate 17. After adjusting to the desired position, release the control lever 18. The restoring force of the spring 16 pushes the connecting rod 15 into the corresponding height through hole 12 for fixing. Then, fasten the silicone sleeve 21 onto the connecting buckle 20 to prevent accidental loosening due to vibration. This adjustment mechanism can effectively avoid bridging of plastic particles of different sizes during screening and adapt to different grading requirements. After adjustment, install screen plate 10 into the bracket 3. Align the positioning frame 7 and insert it into the slot 6 on the bracket 3. Then rotate the screw 8 to rotate the elongated plate 9 until it forms a cross shape with the positioning frame 7. At this time, the elongated plate 9 is laterally clamped on the outside of the bracket 3, realizing the quick installation and locking of screen plate 10 and screen plate 17, which facilitates subsequent... For continued maintenance and replacement, start the vibration motor 4. The excitation force generated by it is transmitted to screen plate 10 and screen plate 2 17 through the bracket 3. The plastic granules to be classified are put into the bracket 3 and first fall onto screen plate 2 17. Under the action of vibration, granules smaller than the aperture of screen plate 2 17 pass through the screen and fall onto screen plate 10, while coarse granules larger than the aperture are discharged from the coarse material outlet along the inclined surface of screen plate 2 17. The granules falling onto screen plate 10 continue to be sorted, and qualified fine granules smaller than the aperture finally pass through the screen and fall to the bottom. The material is collected uniformly in the hopper 5. Medium particles between the apertures of the two screens are discharged from the medium material outlet along the inclined surface of the first screen plate 10. The second screen plate 17 is supported by the hinged insert rod 14, which can generate adaptive swing during vibration, enhance the turning and dispersion of materials, effectively reduce screen hole clogging, and thus improve grading efficiency and screening accuracy. Through quick disassembly and convenient height adjustment structure, the replacement of the two sets of screens is simple and the screening spacing is flexible, improving the efficiency and adaptability of plastic particle grading operations.

[0042] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A plastic granule grading device with easy-to-replace screen, characterized in that: include A base (1) is elastically connected to a support (3) via an elastic element (2). A vibration motor (4) is fixedly connected to the support (3). A hopper (5) is fixedly connected to the bottom of the support (3). A sieve plate one (10) and a sieve plate two (17) for grading and screening particles are provided inside the support (3). The disassembly and assembly assembly is mounted on the bracket (3) and is used to disassemble and assemble the first sieve plate (10) and the second sieve plate (17). An adjustment mounting component is provided on sieve plate one (10) and is used to adjust and install sieve plate one (10) and sieve plate two (17).

2. The plastic granule grading device with easy screen replacement according to claim 1, characterized in that: The bracket (3) has a slot (6). The assembly and disassembly assembly includes a positioning frame (7), a screw (8) and an elongated plate (9). The positioning frame (7) is fixed on the sieve plate (10). The slot (6) is inserted into the positioning frame (7). The screw (8) is threaded onto the positioning frame (7). The elongated plate (9) is fixed onto the screw (8).

3. The plastic granule grading device with easy screen replacement according to claim 1, characterized in that: The adjusting mounting component includes four sets of rectangular frames (11) arranged in a rectangular array fixed on the screen plate (10). Several sets of through holes (12) are opened on the rectangular frames (11). Insert rods (14) are inserted into the rectangular frames (11). Mounting grooves (13) are opened on the insert rods (14). Connecting rods (15) are slidably connected through the insert rods (14). Springs (16) are fixedly connected to the connecting rods (15).

4. The plastic granule grading device with easy screen replacement according to claim 3, characterized in that: The connecting rod (15) is adapted to the through hole (12), and the end of the spring (16) away from the connecting rod (15) is fixed in the mounting groove (13).

5. The plastic granule grading device with easy screen replacement according to claim 3, characterized in that: The top end of the insert rod (14) is hinged to the second sieve plate (17).

6. The plastic granule grading device with easy screen replacement according to claim 3, characterized in that: A through groove (19) is provided on the second sieve plate (17), a control rod (18) is fixedly connected to the connecting rod (15), a connecting buckle (20) is fixedly connected to the second sieve plate (17), and a silicone sleeve (21) with holes is fixedly connected to the control rod (18).

7. The plastic granule grading device with easy screen replacement according to claim 6, characterized in that: The through groove (19) is fitted over the control rod (18).

8. The plastic granule grading device with easily replaceable screen according to claim 6, characterized in that: The holes on the silicone sleeve (21) are adapted to the connecting buckle (20).

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