ABS modified plastic particle screening device

Abstract

The utility model discloses an ABS modified plastic particle screening device belongs to the plastic particle screening device field. The utility model discloses a screen frame, install the screen in screen frame, the top end surface of screen frame installs the apron, and the apron is provided with opening no.

Description

Technical Field

[0001] This utility model relates to the field of ABS modified plastic particle screening device. Background Technology

[0002] After production, ABS modified plastic particles are not completely uniform in size, often containing agglomerates of excessively large particles or powdered particles resulting from improper pelletizing. If these substandard particles are used directly in injection molding, they can lead to quality problems such as flow marks, silver streaks, and uneven strength in the product. Therefore, screening and grading ABS modified plastic particles before packaging or use is a necessary step.

[0003] Currently, vibrating screens are commonly used in the industry for screening. Existing vibrating screens generally include a screen frame and a screen mesh. When in use, the material is placed on the screen mesh, and the movement of the screen mesh is controlled to perform screening.

[0004] However, ABS material itself has good insulation properties, and it is very easy to generate static electricity due to friction during the screening process. This causes fine particles and powder to be adsorbed on the surface of the screen and the inner wall of the screen frame, resulting in screen blockage and seriously reducing screening efficiency and production continuity. Utility Model Content

[0005] This invention provides an ABS modified plastic particle screening device, which can solve the problem in the prior art where fine particles and powders of ABS are adsorbed on the surface of the screen and the inner wall of the screen frame due to static electricity.

[0006] An ABS modified plastic particle screening device includes a screen frame with a screen mesh installed inside the screen frame; a cover plate is installed on the top surface of the screen frame, and the cover plate has an opening one and an opening two. A material discharge port is installed on the opening one, and a dust extraction hood is installed on the opening two; an air supply pipe is installed inside the screen frame below the screen mesh, and an exhaust hole is provided on the peripheral side wall of the air supply pipe.

[0007] Furthermore, the discharge end of the screen is connected to a first discharge chute; the bottom discharge end of the screen frame is connected to a second discharge chute.

[0008] Furthermore, the end of the dust extraction hood is connected to a dust extraction pipe; the dust extraction pipe is connected to a dust extraction fan through a pipe; one end of the air supply pipe passes through the screen frame and is connected to the main air supply pipe, and the main air supply pipe is connected to an air supply pump through a pipe.

[0009] Furthermore, flow valve one and flow valve two are respectively installed on pipe one and pipe two.

[0010] Furthermore, the second pipe is equipped with a refrigeration mechanism and / or a drying mechanism.

[0011] Furthermore, both the refrigeration mechanism and the drying mechanism include a housing, with an air inlet and an exhaust outlet respectively connected to the opposite side walls of the housing; the housing of the drying mechanism is filled with drying particles, and the housing of the refrigeration mechanism is equipped with a refrigeration module.

[0012] Furthermore, the top surface of the screen frame is provided with an installation flange, and a sealing gasket layer is adhered to the upper surface of the installation flange, and the sealing gasket layer and the cover plate are sealed together.

[0013] Furthermore, wind deflectors are provided on opposite side walls of the screen frame located above any of the air supply pipes, and the wind deflectors have an inverted V-shaped structure.

[0014] This invention introduces air into the screen frame through an air supply pipe and extracts the gas from the screen frame through a dust extraction hood. Thus, the gas moves from bottom to top inside the entire screen frame, and the upward airflow carries dust particles, which are then extracted through the dust extraction hood. At the same time, cold or dry air is delivered to the screen through the air supply pipe to form an airflow. The airflow penetrates the screen mesh, which can not only disperse particles attracted by electrostatics and prevent clogging, but also help loosen the material and improve screening efficiency. Attached Figure Description

[0015] Figure 1 A schematic diagram of the structure of an ABS modified plastic particle screening device provided by this utility model; Figure 2 for Figure 1 Side view; Figure 3 for Figure 1 The main view; Figure 4 for Figure 3 Sectional view at point AA.

[0016] Explanation of reference numerals in the attached figures: 1-Screen frame, 2-Cover plate, 3-Main air supply pipe, 10-Screen mesh, 11-Discharge chute one, 12-Discharge chute two, 21-Discharge port, 22-Dust extraction hood, 23-Dust extraction pipe, 31-Air supply pipe, 32-Wind baffle, 101-Installation flange. Detailed Implementation

[0017] The specific embodiments of this utility model are described in detail below, but it should be understood that the scope of protection of this utility model is not limited to the specific embodiments.

[0018] Example 1: As Figures 1 to 4As shown in the figure, the ABS modified plastic particle screening device provided by this utility model includes a screen frame 1, a screen mesh 10 installed inside the screen frame 1, an air supply pipe 31 installed inside the screen frame 1 below the screen mesh 10, an exhaust hole provided on the peripheral side wall of the air supply pipe 31, and a cover plate 2 installed on the top surface of the screen frame 1. The cover plate 2 has an opening one and an opening two. A discharge port 21 is installed on the opening one, and a dust extraction hood 22 is installed on the opening two. In use, air is introduced into the screen frame 1 through the air supply pipe 31, and the gas located in the screen frame 1 is extracted outward through the dust extraction hood 22. Thus, the gas moves from bottom to top inside the entire screen frame 1. The upward airflow will carry dust particles and extract them outward through the dust extraction hood 22. At the same time, cold air or dry air is delivered to the screen mesh 1 through the air supply pipe 31 to form an airflow. The airflow penetrates the mesh of the screen mesh 10, which can not only blow away the particles adsorbed by electrostatics to prevent the screen from clogging, but also help the material to loosen and improve screening efficiency.

[0019] The top surface of the screen frame 1 is provided with an installation flange 101. A sealing gasket is bonded to the upper surface of the installation flange 101. The sealing gasket and the cover plate 2 are sealed together. The cover plate 2 and the screen frame 1 form a relatively closed screening space, which is conducive to dust collection and prevents material from splashing out, and avoids dust from escaping into the environment from the gap between the sealing gasket and the cover plate 2.

[0020] In order to facilitate the delivery of cold or dry air to the screen 1 through the air supply pipe 31, one end of the air supply pipe 31 passes through the screen frame 1 and is connected to the main air supply pipe 3. The main air supply pipe 3 is connected to the air supply pump through the second pipe, and the second pipe is equipped with a refrigeration mechanism and / or a drying mechanism.

[0021] When it is necessary to supply cold air to screen 1 through air supply pipe 31, a refrigeration mechanism is installed on pipe 2; when it is necessary to supply dry air to screen 1 through air supply pipe 31, a drying mechanism is installed on pipe 2; when it is necessary to supply dry cold air to screen 1 through air supply pipe 31, both a refrigeration mechanism and a drying mechanism are installed on pipe 2.

[0022] Specifically, the end of the dust extraction hood 22 is connected to the dust extraction pipe 23; the dust extraction pipe 23 is connected to the dust extraction fan through a pipe; when the dust extraction fan is started, a negative pressure is formed in the dust extraction pipe 23, which draws the dust in the screening area through the dust extraction hood 22 and finally sends it to the dust removal equipment.

[0023] The discharge end of the screen 10 is connected to the first discharge chute 11, which is used to guide and collect large particles or clumps that fail to pass through the screen 10, so that they are discharged from the device in an orderly manner for centralized recycling and processing; the bottom discharge end of the screen frame 1 is connected to the second discharge chute 12, which is used to guide and collect qualified particles that pass through the screen 10.

[0024] Specifically, flow valve one and flow valve two are respectively installed on pipe one and pipe two, allowing operators to precisely adjust the dust extraction air volume and the air supply air volume respectively. These can be flexibly adjusted according to the powder content, static electricity, and other properties of the ABS particles to achieve optimal dust removal and anti-clogging effects while saving energy.

[0025] In order to prevent qualified material passing through the screen from impacting the exhaust hole on the air supply pipe 31, wind shields 32 are provided on the opposite side walls of the screen frame 1 located above any air supply pipe 31. The wind shields 32 have an inverted V-shaped structure and are used to shield and protect the air supply pipe 31.

[0026] Example 2: Based on Example 1 above, in order to generate cold air and dry air, both the refrigeration mechanism and the drying mechanism include a housing, with an air inlet and an exhaust outlet respectively connected to the opposite side walls of the housing; the housing of the drying mechanism is filled with drying particles, and the housing of the refrigeration mechanism is equipped with a refrigeration module; when it is necessary to deliver dry cold air to the screen 1 through the air supply pipe 31, the air is controlled to enter the housing of the drying mechanism from the air inlet, and is dried after passing through the silica gel desiccant; then it enters the housing of the refrigeration mechanism, is cooled by the refrigeration module, and finally the dry cold air enters the second pipe from the exhaust outlet.

[0027] In this application, when cold air is supplied to the screen 1 through the air supply pipe 31, the cold air is used to cool down the ABS particles and the screen, avoiding the screen and ABS particles from heating up due to long-term vibration. This also avoids the problem of the ABS particles being relatively softer than some engineering plastics (such as PC and PA). Under the long-term high-intensity vibration and friction of the screening machine, the surface of the particles may slightly soften and become sticky due to frictional heat, which would aggravate the problem of screen blockage and material adhesion.

[0028] In this application, when dry air is supplied to the screen 1 through the air supply pipe 31, the dry air is used to dry the ABS particles, so as to avoid the fact that the ABS particles have a certain degree of hygroscopicity. If the ambient humidity is high or the moisture content of the particles is high, the surface of the particles will become sticky, and they will also easily stick to the screen during screening, causing screen blockage and low screening efficiency.

[0029] In this application, when dry cold air is delivered to the screen 1 through the air supply pipe 31, the dry cold air is used to cool down the ABS particles and the screen, and at the same time, the ABS particles are dried.

[0030] The above-disclosed embodiments are only a few specific examples of the present utility model. However, the embodiments of the present utility model are not limited thereto. Any changes that can be conceived by those skilled in the art should fall within the protection scope of the present utility model.

Claims

1. A screening device for ABS modified plastic particles, characterized in that, Includes a sieve frame (1), and a sieve mesh (10) is installed inside the sieve frame (1); The top surface of the screen frame (1) is fitted with a cover plate (2). The cover plate (2) is provided with an opening one and an opening two. The opening one is fitted with a discharge port (21), and the opening two is fitted with a dust extraction hood (22). An air supply pipe (31) is installed in the sieve frame (1) located below the sieve (10), and an exhaust hole is provided on the peripheral side wall of the air supply pipe (31).

2. The ABS modified plastic particle screening device as described in claim 1, characterized in that, The discharge end of the screen (10) is connected to the discharge chute (11).

3. The ABS modified plastic particle screening device as described in claim 1, characterized in that, The bottom discharge end of the screen frame (1) is connected to the discharge chute (12).

4. The ABS modified plastic particle screening device as described in claim 1, characterized in that, The end of the dust extraction hood (22) is connected to the dust extraction pipe (23). The dust extraction pipe (23) is connected to the dust extraction fan through a pipeline.

5. The ABS modified plastic particle screening device as described in claim 4, characterized in that, One end of the gas supply pipe (31) passes through the screen frame (1) and is connected to the gas supply main pipe (3), which is connected to the gas supply pump through the second pipe.

6. The ABS modified plastic particle screening device as described in claim 5, characterized in that, Flow valve one and flow valve two are respectively installed on pipe one and pipe two.

7. An ABS modified plastic particle screening device as described in claim 5 or 6, characterized in that, The second pipe is equipped with a refrigeration mechanism and / or a drying mechanism.

8. The ABS modified plastic particle screening device as described in claim 7, characterized in that, Both the refrigeration mechanism and the drying mechanism include a housing, with an air inlet and an exhaust outlet respectively connected to opposite side walls of the housing; the drying mechanism is filled with drying particles, and the refrigeration mechanism is equipped with a refrigeration module inside its housing.

9. The ABS modified plastic particle screening device as described in claim 1, characterized in that, The top surface of the screen frame (1) is provided with an installation flange (101), and a sealing gasket is bonded to the upper surface of the installation flange (101). The sealing gasket and the cover plate (2) are sealed together.

10. The ABS modified plastic particle screening device as described in claim 1, characterized in that, A wind deflector (32) is provided on the opposite side walls of the screen frame (1) located above any of the air supply pipes (31), and the wind deflector (32) has an inverted V-shaped structure.

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