A plastic extruder with twin screws rotating in the same direction

Abstract

The utility model discloses an extrusion equipment technical field's a kind of plastic extruder of double-screw same direction rotation, comprising: base, double-screw extruder main body, drive assembly and feed hopper, two rotating shafts and the drive equipment for driving rotating shaft rotation are equipped in the feed hopper, ball is equipped on the rotating shaft, and magnetic piece is equipped on the ball;The ball is connected with moving assembly, the sidewall of the feed hopper is equipped with two storage boxes for respectively accommodating two balls, the ball is moved by moving assembly in the application, so that two balls are alternately entered into the inside of storage box, to remove the iron impurities adsorbed on the magnetic piece, so that the magnetic piece of ball does not accumulate a large amount of iron impurities when working in the inside of feed hopper, avoid the situation that adsorbed iron impurities is taken away or cannot adsorb subsequent iron impurities, simultaneously avoid that the space occupied by ball is too large and affect the effective cross-sectional area through by mixture, guarantee the quality of plastic processing.

Description

Technical Field

[0001] This utility model relates to the field of extrusion equipment, specifically to a plastic extruder with twin screws rotating in the same direction. Background Technology

[0002] Existing plastic extruders are mainly classified into two categories based on the number of screws: single-screw extruders and twin-screw extruders. Twin-screw extruders can be further divided into co-rotating and counter-rotating types based on the rotation direction of the two screws. Currently, co-rotating twin-screw extruders are more widely used in the market. In this type, the thread shape and rotation direction of the two screws are the same. In the meshing zone, the speed direction of the two screws is the same, so the shearing of the material is relatively mild. The mixing effect is mainly distribution mixing, while also having a certain degree of dispersion mixing capability. For example, the public document of the twin-screw modified plastic extruder with announcement number CN211467412U discloses this type of bidirectional extrusion equipment. However, because the device only uses a magnet on a single sphere to adsorb iron impurities in the mixture, and the iron impurities on the magnet are only cleaned after processing is completed, the amount of iron impurities on the magnet will gradually increase, causing the magnet's adsorption capacity for peripheral iron impurities to gradually decrease. Peripheral iron impurities are easily carried away by the impact of the falling mixture, affecting its impurity removal effect and impacting the quality of plastic extrusion. Furthermore, as the adsorbed iron impurities increase, the overall volume of the sphere will increase, reducing the effective cross-sectional area through which the mixture passes, resulting in uneven feeding and affecting the quality of plastic extrusion. Utility Model Content

[0003] The purpose of this invention is to provide a plastic extruder with twin screws rotating in the same direction, which overcomes the limitations of existing devices.

[0004] The present invention achieves the above objectives through the following technical solution: a twin-screw plastic extruder rotating in the same direction, comprising: a base, a twin-screw extruder body, a drive assembly and a feed hopper, wherein the feed hopper is provided with two rotating shafts and a drive device for driving the rotating shafts to rotate, wherein the rotating shafts are provided with spheres, and the spheres are provided with magnetic components; The sphere is connected to a moving component, and the side wall of the feed hopper is provided with two storage boxes for storing the two spheres respectively. The moving component is used to drive the sphere to move so that the two spheres alternately enter the storage boxes to discharge iron impurities.

[0005] Preferably, the driving device includes a drive motor and a transmission assembly, the two rotating shafts are driven by the transmission assembly, and the output shaft of the drive motor is connected to one of the rotating shafts.

[0006] Preferably, there are two moving components, each used to drive the two spheres to move.

[0007] Preferably, the moving component includes a drive motor mounted on the feed hopper and a lead screw mounted on the output shaft of the drive motor. A kit is fitted on the rotating shaft, and a ball is mounted on the kit. The kit has an annular groove, and an annular block is rotatably mounted in the annular groove. An mounting ring is mounted on the annular block, and the lead screw passes through the mounting ring and the annular block. A screw hole is provided at the connection between the mounting ring and the lead screw.

[0008] Preferably, the two rotating shafts are arranged vertically.

[0009] Preferably, the sphere has a storage groove inside, the storage groove has a plurality of slots, and a collision ball is placed in each slot.

[0010] Preferably, a guide plate is hinged to the bottom of the inner cavity of the storage box, and the storage box is provided with a telescopic drive component for driving the guide plate to rotate.

[0011] Preferably, the guide plate has a mounting groove on its side wall, and a compensation plate and an elastic element connected to the compensation plate are slidably disposed in the mounting groove.

[0012] Preferably, the storage box has a discharge port on the side wall away from the feed hopper, and the length of the discharge port is less than the length of the end of the compensation plate away from the guide plate.

[0013] The beneficial effects of this utility model are as follows: by driving the spheres to move through the moving component, the two spheres alternately enter the interior of the storage box to remove the iron impurities adsorbed on the magnetic components. This prevents the magnetic components of the spheres from accumulating a large amount of iron impurities when working inside the feeding hopper, avoiding the situation where the adsorbed iron impurities are carried away or cannot adsorb subsequent iron impurities. At the same time, it avoids the space occupied by the spheres being too large, which would affect the effective cross-sectional area through which the mixture passes, thus ensuring the quality of plastic processing. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of the plastic extruder with twin screws rotating in the same direction according to this utility model. Figure 2 This is a schematic diagram of the feed hopper structure of this utility model; Figure 3 This is a cross-sectional view of the feed hopper of this utility model; Figure 4 This utility model Figure 3 Enlarged schematic diagram of the structure at point A in the middle; Figure 5 This utility model Figure 3 Enlarged schematic diagram of the structure at point B; Figure 6 This is a cross-sectional view of the connection between the kit and the mounting ring of this utility model; Figure 7 This is a schematic diagram of the cross-sectional structure of the sphere of this utility model.

[0015] In the diagram: 1. Base; 2. Twin-screw extruder body; 3. Drive assembly; 4. Feed hopper; 5. Storage box; 6. Drive motor; 7. Shaft; 8. Ball; 9. Transmission assembly; 10. Mixing mechanism; 11. Guide plate; 12. Telescopic drive component; 13. Elastic component; 14. Compensation plate; 15. Discharge port; 16. Mounting ring; 17. Kit; 18. Lead screw; 19. Drive motor; 20. Annular block; 21. Annular groove; 22. Storage groove; 23. Slot; 24. Collision ball. Detailed Implementation

[0016] The present application will now be described in further detail with reference to the accompanying drawings. It should be noted that the following specific embodiments are only used to further illustrate the present application and should not be construed as limiting the scope of protection of the present application. Those skilled in the art can make some non-essential improvements and adjustments to the present application based on the above application content.

[0017] Example 1 Please see Figure 1 A twin-screw plastic extruder rotating in the same direction includes: a base 1, a twin-screw extruder body 2 and a drive assembly 3 mounted on the top of the base 1, the drive end of the drive assembly 3 being connected to the screw in the twin-screw extruder body 2, and a feed hopper 4 mounted on the top of the twin-screw extruder body 2, with a feed inlet on the top of the feed hopper 4.

[0018] Please see Figure 2 and Figure 3 Two rotating shafts 7 are rotatably arranged in the inner cavity of the feed hopper 4. The feed hopper 4 is equipped with a driving device to drive the rotating shafts 7 to rotate. Each of the two rotating shafts 7 is equipped with a ball 8, and the outer wall of the ball 8 is equipped with a magnetic component. The ball 8 is connected to a moving component. Two storage boxes 5 are connected to the side wall of the feed hopper 4. The two storage boxes 5 are aligned with the two balls 8 respectively. One ball 8 is located in the storage box 5, and the other ball 8 is located in the feed hopper 4.

[0019] It should be noted that the magnetic component refers to an electromagnet.

[0020] Working principle: The mixed raw materials are added into the feed hopper 4 through the feed inlet. The drive device drives the rotating shaft 7 to rotate the ball 8, adsorbing iron impurities in the mixed raw materials onto the magnetic component. When the preset time is reached, the moving component works, driving the ball 8 located in the collection box 5 into the feed hopper 4. At the same time, the moving component also drives the ball 8 into the collection box 5 (the magnetic component on the ball 8 has already adsorbed a large amount of iron impurities in the feed hopper 4). The magnetic component is de-energized, causing the adsorbed iron impurities to fall into the collection box 5. The two balls 8 work alternately (with a set interval) to remove iron impurities from the mixed raw materials. The impurity-removed mixed raw materials enter the twin-screw extruder body 2, are extruded and molded, and then cooled and solidified to obtain the molded plastic parts.

[0021] In this embodiment, as a further optimization, please refer to... Figure 3 The driving device includes a drive motor 6 and a transmission assembly 9. The two rotating shafts 7 are connected by the transmission assembly 9 (the transmission assembly 9 includes two pulleys and a transmission belt, the two pulleys are respectively sleeved on the two rotating shafts 7, and the transmission belt is sleeved on the two pulleys). The drive motor 6 is fixed on the outside of the storage box 5. The output shaft of the drive motor 6 is connected to one of the rotating shafts 7. When the drive motor 6 works, it drives one rotating shaft 7 to rotate, and through the transmission assembly 9, it drives the other rotating shaft 7 to rotate synchronously.

[0022] It should be noted that the top of the inner cavity of the feed hopper 4 is rotatably equipped with a stirring mechanism 10 (including a stirring shaft and blades on the stirring shaft). The end of the stirring shaft is equipped with a driven gear, and the side wall of the feed hopper 4 is equipped with a rotating shaft. The rotating shaft is equipped with a driving gear, and the driving gear meshes with the driven gear. The rotating shaft and the rotating shaft 7 are driven by a transmission assembly 9. The rotating shaft 7 rotates, causing the stirring mechanism 10 to rotate, so as to fully mix the raw materials.

[0023] In this embodiment, as a further optimization, please refer to... Figure 3 There are two moving components, which are used to drive the two balls 8 to move. The two balls 8 are driven by independent moving components. When it is necessary to replace the balls 8, one moving component first moves the balls 8 inside the storage box 5 into the feeding hopper 4, and then the other moving component pushes the balls 8 that have absorbed a large amount of iron impurities into the storage box 5 for impurity removal. This ensures that no iron impurities are left inside the feeding hopper 4 during the replacement of the balls 8.

[0024] It should be noted that the moving components are uniformly controlled by an external controller (PLC controller), enabling the two moving components to work intelligently according to the settings. This control method is existing technology and will not be described in detail here.

[0025] In this embodiment, as a further optimization, please refer to... Figure 3 , Figure 4 , Figure 5 and Figure 6 The moving assembly includes a drive motor 19 mounted on the outer wall of the feed hopper 4 and a lead screw 18 mounted on the output shaft of the drive motor 19. A fitting 17 is sleeved on the outer wall of the rotating shaft 7 (the fitting 17 can only slide on the rotating shaft 7 and cannot rotate relative to the rotating shaft 7). A ball 8 is mounted on the fitting 17. An annular groove 21 is formed through the end of the fitting 17. The annular groove 21 extends along the length of the rotating shaft 7. An annular block 20 is rotatably mounted inside the annular groove 21. One end of the annular block 20 is provided with a mounting ring 16. Ring 16 is located outside the annular groove 21. Lead screw 18 passes through the mounting ring 16 and the annular block 20. The connection between the mounting ring 16 and the lead screw 18 is provided with a screw hole. The lead screw 18 is parallel to the rotating shaft 7. The drive motor 19 drives the lead screw 18 to rotate, so that the mounting ring 16 moves along the length of the lead screw 18, which is used to move the kit 17 and the ball 8 along the length of the rotating shaft 7. The annular block 20 rotates in the inner cavity of the annular groove 21, so that the rotating shaft 7, carrying the kit 17 and the ball 8, rotates without being affected by the lead screw 18.

[0026] In this embodiment, as a further optimization, please refer to... Figure 3 The two rotating shafts 7 are arranged vertically. Since the storage box 5 is used to store the ball 8 on the rotating shaft 7, the two storage boxes 5 are also arranged vertically to avoid the two storage boxes 5 being aligned, which would cause the ball 8 to enter the interior of the storage box 5 and bring the mixed raw materials in as well.

[0027] In this embodiment, as a further optimization, please refer to... Figure 7 The sphere 8 has a storage groove 22 inside, and several slots 23 are formed on the inner wall of the storage groove 22. The slots 23 contain collision balls 24, which are made of a metal material that can be magnetically attracted, such as iron. When the magnetic component is energized to attract iron impurities, it will also attract the collision balls 24 inside, preventing them from moving inside the storage groove 22. When the sphere 8 enters the storage box 5 and the magnetic component is de-energized, the rotating shaft 7 continues to rotate the sphere 8, causing the position of the collision balls 24 inside the storage groove 22 to change continuously, which will cause a certain amount of vibration to the sphere 8. This is used to clean the iron impurities from the surface of the sphere 8 and the magnetic component, ensuring that they are clean.

[0028] Example 2 As a further optimization of Example 1, please refer to Figure 3 and Figure 4The bottom of the inner cavity of the storage box 5 is hinged to a guide plate 11 via a pivot. A telescopic drive component 12 (such as an electric cylinder) is located at the bottom of the storage box 5. A slide block is hinged to the moving end of the telescopic drive component 12, and the slide block is slidably mounted on the bottom wall of the guide plate 11. A discharge port 15 is opened on the bottom wall of the storage box 5 on the side away from the feed hopper 4. When the guide plate 11 inside the empty storage box 5 tilts downwards towards the feed hopper 4, when the ball 8 and the magnetic component carry the adsorbed iron impurities into the empty storage box 5, some of the mixed raw materials inside the feed hopper 4 are inevitably pushed into the storage box 5. The mixed raw materials are then guided back into the storage box 5 by the tilted guide plate 11. The material enters the hopper 4 to avoid mixing with iron impurities and wasting resources. After a period of time (ensuring that the mixed material brought into the storage box 5 by the ball 8 can be discharged, the time is set according to specific needs), the telescopic drive 12 works to drive the guide plate 11 to rotate, so that the end of the guide plate 11 away from the hopper 4 tilts downward. At this time, the magnetic component is de-energized, causing the iron impurities to fall. The guide plate 11 guides them to be discharged from the discharge port 15. After the set time, the telescopic drive 12 moves in the opposite direction, driving the guide plate 11 to rotate in the opposite direction and reset (the end of the guide plate 11 facing the hopper 4 tilts downward).

[0029] It should be noted that the above-mentioned electrical components are controlled by a controller to achieve automated operation of the components. This control method is existing technology and will not be described in detail here.

[0030] In this embodiment, as a further optimization, please refer to... Figure 4 An installation groove is provided on the side wall of the guide plate 11 away from the feed hopper 4. A compensation plate 14 is slidably provided in the inner cavity of the installation groove. An elastic element 13 (spring) is provided between the installation groove and the compensation plate 14. By moving the compensation plate 14 inward or outward, it is ensured that no gap is generated between the side wall of the guide plate 11 away from the feed hopper 4 and the storage box 5 when the guide plate 11 rotates, thereby reducing the probability of the mixed raw materials being discharged from the discharge port 15.

[0031] In this embodiment, as a further optimization, please refer to... Figure 4 The length of the discharge port 15 is less than the length of the end of the compensation plate 14 away from the guide plate 11, to ensure that the compensation plate 14 does not pass through the discharge port 15.

[0032] The embodiments described above are merely examples of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these modifications and improvements all fall within the protection scope of this utility model.

Claims

1. A plastic extruder with twin screws rotating in the same direction, comprising: The base (1), the twin-screw extruder body (2), the drive assembly (3) and the feed hopper (4) are characterized in that the feed hopper (4) is provided with two rotating shafts (7) and a drive device for driving the rotating shafts (7) to rotate, the rotating shafts (7) are provided with spheres (8), and the spheres (8) are provided with magnetic components; The sphere (8) is connected to a moving component. The side wall of the feed hopper (4) is provided with two storage boxes (5) for storing the two spheres (8) respectively. The moving component is used to drive the spheres (8) to move so that the two spheres (8) alternately enter the storage box (5) to discharge iron impurities.

2. The plastic extruder with twin screws rotating in the same direction according to claim 1, characterized in that, The driving device includes a drive motor (6) and a transmission assembly (9). The two rotating shafts (7) are driven by the transmission assembly (9). The output shaft of the drive motor (6) is connected to one of the rotating shafts (7).

3. A plastic extruder with twin screws rotating in the same direction according to claim 1, characterized in that, There are two moving components, each used to drive the two spheres (8) to move.

4. A plastic extruder with twin screws rotating in the same direction according to claim 3, characterized in that, The moving component includes a drive motor (19) mounted on the feed hopper (4) and a lead screw (18) mounted on the output shaft of the drive motor (19). A kit (17) is fitted on the rotating shaft (7). A ball (8) is mounted on the kit (17). An annular groove (21) is provided on the kit (17). An annular block (20) is rotatably mounted in the annular groove (21). An mounting ring (16) is provided on the annular block (20). The lead screw (18) passes through the mounting ring (16) and the annular block (20). A screw hole is provided at the connection between the mounting ring (16) and the lead screw (18).

5. A plastic extruder with twin screws rotating in the same direction according to claim 1, characterized in that, The two rotating shafts (7) are arranged vertically.

6. A plastic extruder with twin screws rotating in the same direction according to claim 1, characterized in that, The sphere (8) is provided with a storage groove (22), and the storage groove (22) is provided with a number of slots (23), and a collision ball (24) is provided in the slots (23).

7. A plastic extruder with twin screws rotating in the same direction according to claim 1, characterized in that, The storage box (5) has a guide plate (11) hinged to the bottom of its inner cavity, and the storage box (5) is provided with a telescopic drive (12) for driving the guide plate (11) to rotate.

8. A plastic extruder with twin screws rotating in the same direction according to claim 7, characterized in that, The guide plate (11) has a mounting groove on its side wall, and a compensation plate (14) and an elastic element (13) connected to the compensation plate (14) are slidably disposed in the mounting groove.

9. A plastic extruder with twin screws rotating in the same direction according to claim 8, characterized in that, The storage box (5) has a discharge port (15) on the side wall away from the feed hopper (4), and the length of the discharge port (15) is less than the length of the end of the compensation plate (14) away from the guide plate (11).

Images