Plastic particle recovery device for blow molding
Through the combined device of cyclone, roller and electrostatic separation components, the separation problem of large particles, small particles, powder and dust in plastic crushed particles is solved, the product quality and recycling efficiency are improved, and the efficient reuse of plastic particles is achieved.
Patent Information
- Application Number
- CN202421149654.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-24
- Publication Date
- 2024-12-31
- Estimated Expiration
- 2034-05-24
AI Technical Summary
The prior art is difficult to effectively separate and reuse large particles, small particles, powders and dust in plastic crushed particles, resulting in a decrease in product quality and low recycling efficiency.
Using a device that combines a cyclone separation assembly, a drum screen separation assembly and an electrostatic separation assembly, large particles from powder and dust are separated by a cyclone separation assembly, and large particles from small particles are separated by a drum screen separation assembly, and the electrostatic separation assembly removes dust and adheres to the particles. electrostatic dust realizes efficient classification and separation of particles.
The quality and recycling efficiency of large and small particles are improved, the product quality is ensured, and the reuse rate of plastic crushed particles is improved.
Smart Images
Figure CN222270906U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of plastic processing, in particular to a plastic particle recovery device for blow molding. Background Art
[0002] The automotive parts field includes many products made by blow molding, such as automotive ventilation pipes, etc. Some blow molding products have relatively low requirements on the quality of raw materials during the production process. The processed waste can be mixed into the raw materials at a ratio of 40%-80% for production, which is both environmentally friendly and cost-saving. The waste in plastic production is called plastic crushed particles. Plastic crushed particles include large particles (diameter greater than 2.5mm), small particles (diameter between 0.01mm and 2.5mm), powder (diameter between 0.001mm and 0.01mm) and dust (diameter less than 0.001mm) according to their size. Both large particles and small particles are plastic particles that can be blow molded again, while dust and powder are difficult to process and utilize. At the same time, some dust will adhere to large particles or small particles due to the electrostatic effect, causing the quality of large particles and small particles to decline, which is not conducive to the reuse of large particles and small particles. Utility Model Content
[0003] The technical problem to be solved by the utility model is to separate large particles, small particles, powder and dust and reasonably reuse them to form a plastic particle recovery device for blow molding with high recovery efficiency.
[0004] The technical solution adopted by the utility model to solve the above problems is: a plastic particle recovery device for blow molding, comprising a cyclone separation component for separating powder and part of dust from large particles and small particles, a drum screen separation component for separating large particles from small particles, and an electrostatic separation component for separating dust from large particles and small particles; the cyclone separation component comprises a separation cylinder, the separation cylinder comprises a cylinder body and a cone, the cylinder body is arranged above the cone, a feed pipe and an exhaust pipe are arranged at the upper end of the cylinder body, the feed pipe is arranged along the tangent of the inner wall of the cylinder body, the exhaust pipe is arranged on the axis of the cylinder body, and a discharge pipe is arranged below the cone, the discharge pipe and the pipe are used to discharge large particles and small particles; a conveying device is arranged between the cyclone separation component and the drum screen separation component, the conveying device comprises a conveying pipe and a spiral feeding rod, the spiral feeding rod is arranged along the axis of the conveying pipe, one end of the conveying pipe is connected to the cyclone separation component for receiving plastic crushed particles, and the other end of the conveying pipe extends into the drum screen separation component for discharging plastic crushed particles; the electrostatic separation component is arranged inside the drum screen separation component.
[0005] Compared with the prior art, the advantages of the utility model are: according to the different diameters of particles, different separators are used to separate and collect large particles, small particles, powder and dust. First, a cyclone separation component is used to separate useful large particles and small particles from useless powder and dust, and then a drum screen separation component is used to separate large particles from small particles, so that large particles and small particles can be classified and used according to the properties of the product. The dust attached to large particles and small particles is separated by an electrostatic separation component, thereby improving the quality of large particles and small particles, thereby ensuring the quality and recovery efficiency of products produced by large particles and small particles. When the plastic crushed particles enter the cylinder along the feed pipe, they rotate and move downward along the inner wall of the cylinder. Because the material is transmitted by wind, when the wind is input into the cylinder and moves along the inner wall of the cylinder, a low-pressure air zone will be formed on the axis of the cylinder. When the material reaches the cone, the material and the wind will move along the inner wall of the cone. During the concentrated extrusion process, the wind will form an upward vortex airflow along the low-pressure air zone due to the low-pressure air zone on the axis of the cylinder. Large and small particles are unable to move toward the exhaust pipe with the vortex airflow due to their heavy weight, and are eventually discharged from the discharge pipe. Powder and dust are lighter in weight, and will move toward the exhaust pipe with the vortex airflow, thereby realizing the separation of large and small particles from powder and dust.
[0006] As another improvement of the present invention, the cross-section of the feed pipe is rectangular, and the cross-section of the feed pipe includes a height side arranged along the inner wall of the cylinder and a width side perpendicular to the height side, and the length of the height side is greater than the length of the width side. Through the improvement, compared with the circular structure of the cross-section of the feed pipe, the rectangular cross-section allows the plastic crushed particles to better contact with the inner wall of the cylinder when they enter the cylinder, thereby improving the separation efficiency of large particles, small particles, powder and dust.
[0007] As another improvement of the utility model, the air inlet of the exhaust pipe is inserted into the cylinder body, and the insertion depth of the exhaust pipe is greater than the side length of the height side of the feed pipe. Through the improvement, if the insertion depth of the exhaust pipe is less than the side length of the height side of the feed pipe, when the plastic crushed particles enter the cylinder body, a small amount of plastic crushed particles will be directly discharged from the exhaust pipe without cyclone separation, which may easily cause large particles or small particles to enter the exhaust pipe.
[0008] As another improvement of the present invention, the other end of the exhaust pipe is connected to a powder collecting barrel, the bottom end of the powder collecting barrel is connected to the exhaust pipe, the top end of the powder collecting barrel is connected to a powder induced draft fan, and a filter is provided inside the powder collecting barrel. Through the improvement, when powder and dust enter the exhaust pipe, it is necessary to collect the powder and dust for subsequent treatment. If they are directly discharged into the atmosphere, it will cause air pollution. During the collection process, the wind force provided by the cyclone separation component will quickly weaken after leaving the cyclone separation component, making it difficult to collect powder and dust. At the same time, during the collection process, the design of the collection pipe will also increase the difficulty of collecting powder and dust, thereby requiring the increase of powder induced draft fans. The design of the machine is to provide the effect of collecting powder and dust. The design of the powder induced draft fan makes it more likely that the plastic crushed particles will move directly toward the exhaust pipe without swirling when entering the cylinder, so that the insertion depth of the exhaust pipe is required to be greater than the side length of the height side of the feed pipe. In the process of collecting powder and dust, in order to prevent the powder and dust from entering the powder collection barrel and then moving toward the powder induced draft fan, a filter is added, which not only achieves the purpose of powder and dust collection, but also does not affect the subsequent use of the powder induced draft fan. The airflow adopts a low-end inlet and high-end outlet design during the collection process of powder and dust, which can also increase the difficulty of powder or dust passing through the filter and entering the powder induced draft fan, further ensuring the service life of the powder induced draft fan.
[0009] As another improvement of the present invention, the drum screen separation assembly includes a screen net, a sheet metal chute and a small particle collection drawer, the screen net is arranged in a frustum, the diameter of the screen net increases in the direction away from the conveying device, the screen net is arranged to rotate, the sheet metal chute is inclined below the screen net for receiving small particles, the small particle collection drawer is arranged at the end of the sheet metal chute for collecting small particles, and the end of the screen net away from the conveying device is provided with a discharge port for discharging large particles. Through the improvement, during the rotation of the screen net, the plastic crushed particles will follow the screen net to flip and move to the end of the screen net with a larger diameter. During the flipping and moving process of the plastic crushed particles, large particles and small particles can be fully broken up, and small particles are more likely to fall from the mesh of the screen net to the sheet metal chute, thereby realizing the separation of large particles and small particles, and then the small particles and large particles are collected separately.
[0010] As another improvement of the present invention, the electrostatic separation component comprises an anode plate, a corona electrode and a dust blower, the anode plate and the corona electrode are arranged along the axis of the drum screen separation component, the anode plate is arranged at the feed end of the drum screen separation component, the corona electrode is arranged at the discharge end of the drum screen separation component, and the dust blower is arranged on the side close to the feed end of the drum screen separation component. Through the improvement, the electrostatic separation component is arranged inside the drum screen separation component, and when the plastic crushed particles follow the drum screen separation component to flip, the large particles and the small particles are fully broken up. At this time, the static electricity between the dust and the large particles and the small particles can be fully eliminated by using the corona electrode discharge, so that the dust is separated from the large particles and the small particles, and then the anode plate attracts the charged dust and moves the dust toward the anode plate. During the dust movement process, the dust blower absorbs the dust again, thereby avoiding the accumulation of dust inside the drum screen separation component, thereby realizing the separation of dust from the large particles and the small particles, and ensuring the quality of the large particles and the small particles. BRIEF DESCRIPTION OF THE DRAWINGS
[0011] Figure 1 It is a schematic diagram of the overall structure of the utility model.
[0012] Figure 2 It is a schematic diagram of the internal structure and wind flow direction of the cyclone separation component of the utility model.
[0013] Figure 3 It is a schematic diagram of the cross-sectional structure of the drum screen separation component of the utility model.
[0014] Figure 4 It is a schematic diagram of the dust collection channel structure and dust movement path of the utility model.
[0015] As shown in the figure: 1. Cyclone separation component, 1.1. Cylinder, 1.2. Cone, 1.3. Feed pipe, 1.4. Exhaust pipe, 1.5. Discharge pipe, 2. Drum screen separation component, 2.1. Screen net, 2.2. Sheet metal slide, 2.3. Small particle collection drawer, 2.4. Discharge port, 2.5. Support frame, 3. Electrostatic separation component, 3.1. Anode plate, 3.2. Corona electrode, 3.3. Dust induced draft fan, 4. Powder collection barrel, 5. Powder induced draft fan, 6. Filter net, 7. Conveying device, 7.1. Conveying pipe, 7.2. Screw feed rod, 7.3. Driving gear, 7.4. First transmission gear, 7.5. Second transmission gear, 8. Speed reducer, 9. Collection plate, 10. Dust collection drawer. DETAILED DESCRIPTION
[0016] The embodiments of the present utility model are further described below in conjunction with the accompanying drawings.
[0017] like Figure 1-4As shown, a plastic particle recovery device for blow molding includes a cyclone separation component 1, a drum screen separation component 2 and an electrostatic separation component 3. The plastic crushed particles include large particles, small particles, powder and dust, wherein some dust adheres to large particles or small particles due to electrostatic induction. The plastic crushed particles pass through the cyclone separation component 1, the drum separator and the electrostatic separation component 3 in sequence. The cyclone separation component 1 is used to separate the powder and some dust from large particles and small particles, the drum screen separation component 2 is used to separate large particles from small particles, and the electrostatic separation component 3 is used to separate dust from large particles and small particles. The cyclone separation assembly 1 includes a separation cylinder, which includes a cylinder body 1.1 and a cone body 1.2. The cylinder body 1.1 is arranged above the cone body 1.2. A feed pipe 1.3 and an exhaust pipe 1.4 are arranged at the upper end of the cylinder body 1.1. The feed pipe 1.3 is arranged along the tangent of the inner wall of the cylinder body 1.1. The exhaust pipe 1.4 is arranged on the axis of the cylinder body 1.1. A discharge pipe 1.5 is arranged below the cone body 1.2. The discharge pipe is used to discharge large particles and small particles. The cross-section of the feed pipe 1.3 is rectangular. The cross-section of the feed pipe 1.3 includes a height side arranged along the inner wall of the cylinder body 1.1 and a width side perpendicular to the height side. The side length of the height side is greater than the side length of the width side. The air inlet of the exhaust pipe 1.4 is inserted into the cylinder body 1.1, and the insertion depth of the exhaust pipe 1.4 is greater than the side length of the height side of the feed pipe 1.3.
[0018] A conveying device 7 is provided between the cyclone separation component 1 and the drum screen separation component 2. The conveying device 7 comprises a conveying pipe 7.1 and a screw feeding rod 7.2. The screw feeding rod 7.2 is arranged along the axis of the conveying pipe 7.1. One end of the conveying pipe 7.1 is connected to the cyclone separation component 1 for receiving the plastic crushed particles, and the other end of the conveying pipe 7.1 extends into the drum screen separation component 2 for discharging the plastic crushed particles.
[0019] The other end of the exhaust pipe 1.4 is connected to a powder collecting barrel 4, the bottom end of the powder collecting barrel 4 is connected to the exhaust pipe 1.4, the top of the powder collecting barrel 4 is connected to a powder induced draft fan 5, a filter screen 6 is provided inside the powder collecting barrel 4, and the powder collecting barrel 4 is formed by connecting two half barrels, and the filter screen 6 is provided at the joint of the two half barrels, so that the filter screen 6 can be easily replaced and maintained.
[0020] The drum screen separation assembly 2 includes a screen net 2.1, a sheet metal chute 2.2 and a small particle collection drawer 2.3. The screen net 2.1 is arranged in a cone shape, and the diameter of the screen net 2.1 increases in the direction away from the conveying device 7. The screen net 2.1 is arranged to rotate, and the sheet metal chute 2.2 is inclined below the screen net 2.1 for receiving small particles. The small particle collection drawer 2.3 is arranged at the end of the sheet metal chute 2.2 for collecting small particles. The end of the screen net 2.1 away from the conveying device 7 is provided with a discharge port 2.4 for discharging large particles.
[0021] The electrostatic separation component 3 includes an anode plate 3.1, a corona electrode 3.2 and a dust blower 3.3. The electrostatic separation component 3 is arranged inside the drum screen separation component 2. The anode plate 3.1 and the corona electrode 3.2 are arranged along the axis of the drum screen separation component 2. The anode plate 3.1 is arranged at the feed end of the drum screen separation component 2, the corona electrode 3.2 is arranged at the discharge end of the drum screen separation component 2, and the dust blower 3.3 is arranged on the side close to the feed end of the drum screen separation component 2.
[0022] A motor and a transmission shaft are provided below the conveying device 7. The motor is used to drive the transmission shaft to rotate. Two driving gears 7.3 are provided on the transmission shaft. A first transmission gear 7.4 is provided at one end of the spiral feeding rod 7.2, which is chain-drivenly connected to one of the driving gears 7.3. A second transmission gear 7.5 which is chain-drivenly connected to the outer wall of the conveying pipe 7.1 is rotatably connected to the other driving gear 7.3. The second transmission gear 7.5 is used to drive the screen mesh 2.1 to rotate. Support frames 2.5 are provided at the narrow mouth end and the wide mouth end of the screen mesh 2.1. The second transmission gear 7.5 rotates synchronously with the support frame 2.5 at the narrow mouth end. The gear transmission ratio of the first transmission gear 7.4 and the gear transmission ratio of the second transmission gear 7.5 are designed accordingly according to the rotation speed of the spiral feeding rod 7.2 and the rotation speed of the screen mesh 2.1.
[0023] When the plastic crushed particles move in the screen mesh 2.1, the screen mesh 2.1 rotates, causing the plastic crushed particles to rotate with it. When the plastic crushed particles move to the upper half of the screen mesh 2.1, the plastic crushed particles will leave the screen mesh 2.1 due to rotational inertia and move from the narrow end to the wide end. When the plastic crushed particles move to the discharge area of the corona electrode 3.2, large particles, small particles and dust will be charged at the same time and repel each other. Then, the dust is attracted by the anode plate 3.1 and floats in the direction of the anode plate 3.1. During the floating process, it is affected by the dust induced draft fan 3.3 and is sucked away by the dust induced draft fan 3.3, while small particles and large particles continue to fall onto the screen mesh 2.1. Small particles fall onto the sheet metal chute 2.2 through the holes on the screen mesh 2.1, and large particles are discharged from the discharge port 2.4 of the screen mesh 2.1.
[0024] A dust collection channel and a dust collection drawer 10 are provided at the air outlet of the dust induced draft fan 3.3. The dust collection drawer 10 is provided at the end of the dust collection channel. A deceleration plate 8 and a collection plate 9 are provided on the dust collection channel. The deceleration plate 8 is arranged obliquely upward along the flow direction of the airflow, and the collection plate 9 is arranged obliquely downward along the flow direction of the airflow. When the dust is just discharged from the dust induced draft fan 3.3, the dust flow rate is fast and floats in the dust collection channel, which is not conducive to the collection of dust. The dust is first made to flow to the wall and then reflux to form air reflux. The flow mode of reflux against the wall will reduce the flow rate of the dust airflow for the first time. The dust particles are blown away by the air and then passed through the deceleration plate 8 to be blown away by the airflow. The deceleration plate 8 and the collecting plate 9 are respectively fixed on both sides of the dust collecting channel to form a zigzag shape. Finally, the decelerated dust airflow moves along the dust collecting channel on the collecting plate 9 and falls into the dust collecting drawer 10, thereby achieving the purpose of quickly reducing the dust flow rate and facilitating collection in a smaller space.
[0025] The above description is only for the best embodiment of the utility model, but it cannot be understood as a limitation of the claims. The utility model is not limited to the above embodiments, and its specific structure is allowed to be changed. All changes made within the protection scope of the independent claims of the utility model are within the protection scope of the utility model.
Claims
1. A plastic particle recovery device for blow molding, characterized in that: The invention comprises a cyclone separation component (1) for separating powder and part of dust from large particles and small particles, a drum screen separation component (2) for separating large particles from small particles, and an electrostatic separation component (3) for separating dust from large particles and small particles; the cyclone separation component (1) comprises a separation cylinder, the separation cylinder comprises a cylinder body (1.1) and a cone body (1.2), the cylinder body (1.1) is arranged above the cone body (1.2), a feed pipe (1.3) and an exhaust pipe (1.4) are arranged at the upper end of the cylinder body (1.1), the feed pipe (1.3) is arranged along the tangent line of the inner wall of the cylinder body (1.1), the exhaust pipe (1.4) is arranged on the axis of the cylinder body (1.1), and the separation cylinder comprises a cylinder body (1.1) and a cone body (1.2). A discharge pipe (1.5) is provided below the cone (1.2), and the discharge pipe is used to discharge large particles and small particles; a conveying device (7) is provided between the cyclone separation component (1) and the drum screen separation component (2), and the conveying device (7) comprises a conveying pipe (7.1) and a screw feed rod (7.2), and the screw feed rod (7.2) is arranged along the axis of the conveying pipe (7.1), one end of the conveying pipe (7.1) is connected to the cyclone separation component (1) for receiving plastic crushed particles, and the other end of the conveying pipe (7.1) extends into the drum screen separation component (2) for discharging plastic crushed particles; the electrostatic separation component (3) is arranged inside the drum screen separation component (2).
2. A blow molding plastic particle recovery device according to claim 1, characterized in that: The cross section of the feed pipe (1.3) is rectangular, and comprises a height side arranged along the inner wall of the cylinder (1.1) and a width side perpendicular to the height side, wherein the length of the height side is greater than the length of the width side.
3. A blow molding plastic particle recovery device according to claim 2, characterized in that: The air inlet of the exhaust pipe (1.4) is inserted into the cylinder (1.1), and the insertion depth of the exhaust pipe (1.4) is greater than the side length of the height side of the feed pipe (1.3).
4. A blow molding plastic particle recovery device according to claim 3, characterized in that: The other end of the exhaust pipe (1.4) is connected to a powder collection barrel (4), the bottom end of the powder collection barrel (4) is connected to the exhaust pipe (1.4), the top end of the powder collection barrel (4) is connected to a powder exhaust fan (5), and a filter screen (6) is provided inside the powder collection barrel (4).
5. The device for recovering plastic particles for blow molding according to claim 1, characterized in that: The drum screen separation assembly (2) comprises a screen mesh (2.1), a sheet metal chute (2.2) and a small particle collection drawer (2.3); the screen mesh (2.1) is arranged in a frustum; the diameter of the screen mesh (2.1) increases in a direction away from the conveying device (7); the screen mesh (2.1) is arranged in a rotating manner; the sheet metal chute (2.2) is arranged obliquely below the screen mesh (2.1) for receiving small particles; the small particle collection drawer (2.3) is arranged at the end of the sheet metal chute (2.2) for collecting small particles; and a discharge port (2.4) for discharging large particles is provided at one end of the screen mesh (2.1) away from the conveying device (7).
6. A blow molding plastic particle recovery device according to claim 1, characterized in that: The electrostatic separation component (3) comprises an anode plate (3.1), a corona electrode (3.2) and a dust induced draft fan (3.3); the anode plate (3.1) and the corona electrode (3.2) are arranged along the axis of the drum screen separation component (2); the anode plate (3.1) is arranged at the feed end of the drum screen separation component (2); the corona electrode (3.2) is arranged at the discharge end of the drum screen separation component (2); and the dust induced draft fan (3.3) is arranged on the side close to the feed end of the drum screen separation component (2).