Screening device for plastic particles

Abstract

The utility model relates to the technical field of screening devices, in particular to a screening device for plastic particles. The utility model provides a plastic particle screening device which comprises a rack for playing a foundation supporting role, a screening assembly for conducting three-level particle size classification operation on particles in a vibration mode is arranged at the top of the rack, and a material box for collecting raw materials with medium particle sizes and small particle sizes is arranged in the rack. A material channel used for discharging large-particle-size raw materials is further arranged between the material boxes. Due to the fact that the screening device is provided with the screening assembly, three-stage screening operation of the granular materials can be achieved through the screening assembly, then the percent of pass of products is improved, and the problems that in the prior art, simple two-stage screening operation is mainly conducted on the granular materials through a linear screen, screening of the granular materials is not fine enough, and the screening efficiency is poor are solved. And the defect rate of a final product is reduced in a limited way.

Description

Technical Field

[0001] The present application relates to the technical field of screening devices, and in particular to a screening device for plastic particles. Background Art

[0002] In the plastic extrusion production process, the particle size consistency of raw material particles is critical to product quality. When the particle size of raw material particles varies greatly, it will lead to inconsistent melting time in the extruder, which in turn affects the quality and consistency of the product. Larger particles take longer to melt completely, while smaller particles may melt too quickly. This uneven melting process will produce defects in the final product, such as bubbles, weak weld lines and uneven physical properties.

[0003] In the prior art, a linear screen is usually used to perform a simple linear two-stage screening operation on plastic granules, resulting in insufficient screening of the granules and limited reduction in the defect rate of the final product. Utility Model Content

[0004] The problem to be solved by the present application is that the existing granular materials are mainly subjected to a simple two-stage screening operation through a linear screen, resulting in insufficient screening of the granular materials and a limited reduction in the defect rate of the final product.

[0005] In order to solve the above technical problems, the present application provides a screening device for plastic particles, including a frame for serving as a basic support, a screening component for performing three-level particle size classification operations on the granular material by vibration, and a material box for collecting medium-sized and small-sized raw materials inside the frame. A material channel for discharging large-sized raw materials is also arranged between the material boxes.

[0006] Since the screening device of the present application is designed with a screening component, it is possible to implement a three-stage screening operation of the granular material through the screening component, thereby improving the qualified rate of the product, and solving the problem that the granular material in the prior art is mainly subjected to a simple two-stage screening operation through a linear screen, resulting in insufficient screening of the granular material and a limited reduction in the defect rate of the final product. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] Figure 1 Schematic diagram of the three-dimensional structure of the embodiment.

[0008] Figure 2 It is a front view structural schematic diagram of an embodiment.

[0009] Figure 3 Schematic diagram of the top structure of the embodiment.

[0010] Figure 4 It is a side structural schematic diagram of an embodiment.

[0011] Figure 5 Schematic diagram of the structure of the screening component.

[0012] Figure 6 Schematic diagram of the structure of the driving component.

[0013] Figure 7 Schematic diagram of the structure of the screen plate.

[0014] In the figure: 1. Screening assembly; 2. Frame; 3. Casters; 4. Material channel; 5. Material box; 6. Driving parts; 7. Screen plate parts; 8. Motor; 9. Cam; 10. Tension spring; 11. Roller; 12. Connecting plate; 13. Plate frame; 14. Upper screen plate; 15. Discharge port; 16. Lower screen plate. DETAILED DESCRIPTION

[0015] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application. Example

[0016] The present application relates to a screening device for plastic particles, such as Figure 1-7 As shown, the screening device includes a frame 2 for serving as a basic support, casters 3 capable of walking are arranged at the bottom of the frame 2, and a screening component 1 for performing three-level particle size classification operations on granular materials by vibration is arranged on the top of the frame 2. Inside the frame 2, a material box 5 for collecting medium-sized and small-sized raw materials is arranged, and a material channel 4 for discharging large-sized raw materials is also arranged between the material boxes 5. The large, medium and small particle sizes are distinguished by the aperture size of the sieve plate.

[0017] The screening assembly 1 includes a driving member 6 and a screen plate member 7. The screen plate member 7 is arranged at an angle on the top of the frame 2. The driving member 6 is arranged on the top of the frame 2 to drive the screen plate member 7 to vibrate back and forth, so that the plastic particles on its surface are screened by particle size. Raw materials of different particle sizes pass through the screen plate member 7 and are sent to their respective material boxes 5 or material channels 4 according to their grades.

[0018] The sieve plate member 7 includes a sieve plate and a plate frame 13. The plate frame 13 is arranged in an inclined overlap shape inside the frame 2. A sieve plate for screening the granular material is arranged on the upper part of the plate frame 13. In order to achieve the three-level classification operation of the granular material, there are two sieve plates, which are arranged up and down and spaced apart on the upper part of the plate frame 13. The sieve plate at the lower part is the lower sieve plate 16, and the sieve plate at the upper part is the upper sieve plate 14. The aperture of the lower sieve plate 16 is smaller than that of the upper sieve plate 14, and a discharge port 15 is formed at one end of the lower sieve plate 16 to discharge medium-sized granular materials with moderate particle size. The granular materials that pass through the lower sieve plate 16 are small granular materials, and the granular materials that fail to pass through the upper sieve plate 14 are large granular materials, that is, unqualified materials.

[0019] The driving member 6 includes a motor 8, a cam 9, a tension spring 10, a connecting plate 12, and a roller 11. The connecting plate 12 is arranged on one side of the plate frame 13 and is connected to it by bolts. On the upper part of the frame 2, a motor 8 for providing a vibration driving force is arranged. The output end of the motor 8 is provided with a cam 9 that abuts against the connecting plate 12. In order to achieve the up and down reciprocating vibration of the connecting plate 12 with the help of the cam 9, a tension spring 10 connected to the connecting plate 12 to play an elastic traction role is also arranged on the upper part of the motor 8. In order to avoid the connection between the connecting plate 12 and the frame 2, Therefore, rollers 11 with flexible supporting functions are symmetrically arranged at both ends of the connecting plate 12, so that the cam 9 is driven to rotate by the motor 8, and the cam 9 drives the connecting plate 12 abutting against it to make up and down reciprocating motion through its non-circular surface, and applies elastic traction to the connecting plate 12 through the tension spring 10, so that the connecting plate 12 can vibrate back and forth on the upper part of the frame 2, and with the help of the rollers 11 made of flexible material arranged at both ends, it plays a buffering abutment role with the frame 2, avoiding deformation of the connecting plate 12 due to rigid impact.

[0020] When in use, the granular material of the particle size to be screened is poured into the screen plate 7, and then the motor 8 is started to drive the cam 9 to rotate. Then the cam 9 drives the connecting plate 12 abutting against it and drives the screen plate to vibrate up and down under the traction of the tension spring 10, so that the granular material can fall along the inclined screen plate, and the granular material with large particle size cannot pass through the upper screen plate 14 and is discharged along the material channel 4. The granular material with medium and small particle size passes through the upper screen plate 14 and falls to the upper part of the lower screen plate 16. Then the granular material with small particle size passes through the lower screen plate 16 to the inside of the material box 5, and the granular material with medium particle size cannot pass through the lower screen plate 16 and rolls along its surface to the inside of another material box 5, thereby quickly completing the three-level classification operation of the granular material.

[0021] Generally speaking, terms should be understood, at least in part, based on the context in which they are used. For example, as used herein, the term "one or more" can be used to describe any feature, structure, or characteristic in the singular sense, or can be used to describe a combination of features, structures, or characteristics in the plural sense, depending at least in part on the context. Similarly, terms such as "a," "an," or "the" can also be understood to convey either singular or plural usage, depending at least in part on the context.

[0022] It should be readily understood that “on,” “above,” and “over” in this disclosure should be interpreted in the broadest manner, such that “on” means not only “directly on something,” but also includes “on something” with intervening features or layers therebetween, and “above” or “over” includes not only the meaning of “above” or “over,” but also includes “above” or “over” with no intervening features or layers therebetween (i.e., directly on something).

[0023] Additionally, spatially relative terms, such as "below," "beneath," "beneath," "above," and the like, may be used herein for ease of description to describe the relationship of one element or feature relative to other elements or features as shown in the figures. Spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. The device may be in other orientations (rotated 90 degrees or at other orientations), and the spatially relative descriptors used herein should be interpreted accordingly.

[0024] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some or all of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A screening device for plastic particles, comprising a frame for supporting a base, characterized in that: A screening assembly is arranged on the top of the frame, which uses vibration to classify the granular material into three levels of particle size. Inside the frame are arranged material boxes for collecting medium-sized and small-sized raw materials. There are also material channels between the material boxes for discharging large-sized raw materials.

2. The plastic granule screening device according to claim 1, characterized in that: The screening assembly includes a driving member and a sieve plate member. The sieve plate member is arranged on the top of the frame in an inclined shape. The driving member is arranged on the top of the frame to drive the sieve plate member to vibrate reciprocatingly.

3. The plastic granule screening device according to claim 2, characterized in that: The sieve plate component includes a sieve plate and a plate frame. The plate frame is arranged inside the frame in an inclined overlapping manner. The sieve plate for screening the granular material is arranged on the upper part of the plate frame.

4. The plastic granule screening device according to claim 3, characterized in that: There are two sieve plates, which are an upper sieve plate and a lower sieve plate arranged up and down and spaced apart on the upper part of the plate frame.

5. The plastic granule screening device according to claim 4, characterized in that: The aperture of the lower sieve plate is smaller than that of the upper sieve plate, and a discharge port is formed at one end of the lower sieve plate.

6. The plastic granule screening device according to claim 3, characterized in that: The driving part includes a motor, a cam, and a connecting plate. The connecting plate is arranged on one side of the plate frame and connected to it by bolts. A motor for providing vibration driving force is arranged on the upper part of the frame, and a cam abutting the connecting plate is arranged at the output end of the motor.

7. The plastic granule screening device according to claim 6, characterized in that: The driving member also includes a tension spring, and the upper part of the motor is also provided with a tension spring connected with the connecting plate to play an elastic traction role.

8. The plastic granule screening device according to claim 6, characterized in that: The driving member also includes rollers, and rollers with flexible supporting functions are symmetrically arranged at both ends of the connecting plate.

9. The plastic granule screening device according to claim 1, characterized in that: Casters capable of walking operations are arranged at the bottom of the frame.

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