Multifunctional adjustable three-screw variable double-screw extruder unit

Abstract

The application provides a multifunctional adjustable three-screw variable double-screw extruder set, which comprises a machine table, a middle screw mechanism fixed to the middle of the upper end of the machine table, two groups of side screw mechanisms symmetrically and slidably connected to the left and right sides of the upper end of the machine table, a gear box installed at the rear end of the machine table, and the side screw mechanisms and the gear box being detachably connected and the side screw mechanisms and the middle screw mechanism being connected through the gear box. The middle screw extrusion cylinder in the fixed state is provided, and the side screw extrusion cylinders are detachably arranged on the left and right sides of the middle screw extrusion cylinder. The side screw extrusion cylinders and the middle screw extrusion cylinder can be spliced to form a double-screw extruder or a three-screw extruder. Only the installation position of the side screw extrusion cylinder needs to be turned by 180 degrees, so that the side fitting opening is matched with the opening of the middle channel. After the positions of the side screw extrusion cylinders are all turned, the middle screw extrusion cylinder can be used for single-screw extrusion work alone. Therefore, the screw extruder can be multifunctionally used according to the needs of workers.

Description

Technical Field

[0001] This invention relates to the field of extrusion unit technology, specifically to a multifunctional adjustable three-screw to twin-screw extrusion unit. Background Technology

[0002] Screw extruders rely on the pressure and shear force generated by the rotating screw to fully plasticize and uniformly mix materials, which are then formed through a die. Plastic extruders can be broadly classified into twin-screw extruders, single-screw extruders, and less common multi-screw extruders and screwless extruders. Currently, most three-screw extruders cannot change the number of screws. Therefore, when switching to a twin-screw extruder is needed, the entire extruder must be replaced, requiring multiple extrusion units to be installed in the factory, resulting in higher costs. Summary of the Invention

[0003] The purpose of this invention is to overcome the shortcomings of the prior art and provide a multifunctional adjustable three-screw to twin-screw extruder unit to solve the problems existing in the background art.

[0004] A multifunctional adjustable three-screw to twin-screw extruder unit includes a machine base. A central screw mechanism is fixed in the middle of the upper part of the machine base. Two sets of side screw mechanisms are symmetrically slidably connected to the left and right sides of the upper part of the machine base. A gearbox is installed at the rear end of the machine base. The side screw mechanisms are detachably connected to the gearbox. The side screw mechanisms are connected to the central screw mechanism through the gearbox.

[0005] Preferably, the intermediate screw mechanism includes an intermediate screw extrusion cylinder, an intermediate screw, an intermediate shaft, and an intermediate hopper. The intermediate screw extrusion cylinder is fixed to the machine base. An intermediate channel is provided inside the intermediate screw extrusion cylinder. Both ends of the intermediate channel are open. The intermediate screw is installed inside the intermediate channel. The intermediate shaft is fixed at the center of the intermediate screw. The intermediate hopper is installed at the upper end of the intermediate screw extrusion cylinder and communicates with the intermediate channel. The rear part of the intermediate shaft extends into the gearbox.

[0006] Preferably, the side screw mechanism includes a side screw extrusion cylinder, a side screw, a side shaft, and a side hopper. The side screw extrusion cylinder is movably disposed above the machine base. One end of the side screw extrusion cylinder has a side channel. The side hopper is installed on the upper end of the side screw extrusion cylinder and communicates with the side channel. The other end of the side screw extrusion cylinder has a side fitting port. The side screw is installed inside the side channel. The side shaft is fixed at the center of the side screw. The rear end of the side shaft movably passes through the gearbox. The side fitting port fits with the left and right opening ends of the central channel. The side channel matches the central channel.

[0007] Preferably, a slide block is fixed at the upper end of the machine platform and on both sides of the middle screw extrusion cylinder. A slide rail is opened at the upper end of the slide block. A slide table is slidably connected inside the slide rail. An electromagnet is fixedly installed at one end of the inner wall of the slide rail. The slide table is made of iron. The upper end of the slide table is fixed to the lower end of the side screw extrusion cylinder.

[0008] Preferably, guideways are provided on both sides of the front end of the gearbox, and the side shaft passes through the guideways.

[0009] Preferably, guide grooves are provided on both the left and right sides of the rear end of the inner wall of the gearbox, and a bearing is slidably connected inside the guide groove. A side rotating shaft is connected to the front end of the bearing, and a large side gear is fixed outside the side rotating shaft. The front end of the side rotating shaft and the rear end of the side shaft are fixed in a one-to-one correspondence.

[0010] Preferably, a central bearing is connected to the rear end of the inner wall of the gearbox, the front part of the central bearing is fixed to the rear part of the central shaft, a medium and large gear is fixed to the outside of the central bearing, a motor is installed in the middle of the rear end of the gearbox, and the output end of the motor is connected to the rear part of the central bearing.

[0011] Preferably, a shaft is connected to the rear end of the inner wall of the gearbox and located between the medium-sized gear and the side-sized gear via a bearing. A small gear is fixed to the outside of the shaft, and both the medium-sized gear and the side-sized gear are meshed with the small gear.

[0012] Beneficial effects: This multi-functional adjustable three-screw to twin-screw extruder unit features a fixed central screw extrusion cylinder, with detachable side screw extrusion cylinders on either side. The side screw extrusion cylinders and the central screw extrusion cylinder can be combined to form a twin-screw or three-screw extruder. Simply rotate the side screw extrusion cylinders 180 degrees to align their fitting ports with the opening of the central channel. After all the side screw extrusion cylinders are rotated, the central screw extrusion cylinder can be used alone for single-screw extrusion. This allows for multi-functional use of the screw extruder according to worker needs, eliminating the need for multiple extruders with different screw models and saving costs. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the three-screw assembly in use according to the present invention;

[0014] Figure 2 This is a schematic diagram of the twin-screw mechanism in use according to the present invention;

[0015] Figure 3 This is a schematic diagram of the single screw in use according to the present invention;

[0016] Figure 4 This is a schematic diagram of the slide block of the present invention;

[0017] Figure 5This is a partial cross-sectional schematic diagram of the gearbox of the present invention.

[0018] In the diagram: 1-Machine base, 2-Gearbox, 3-Guideway, 4-Slide seat, 5-Slide table, 6-Side screw extrusion barrel, 7-Side channel, 8-Side screw, 9-Side shaft, 10-Side mating port, 11-Middle screw extrusion barrel, 12-Middle channel, 13-Middle screw, 14-Middle shaft, 15-Middle hopper, 16-Side hopper, 17-Electromagnet, 18-Slideway, 19-Guide groove, 20-Shaft seat, 21-Side rotating shaft, 22-Side large gear, 23-Shaft rod, 24-Small gear, 25-Middle rotating shaft, 26-Middle and large gears. Detailed Implementation

[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] Please see Figures 1-5A multifunctional adjustable three-screw to twin-screw extruder unit includes a machine base 1. A central screw mechanism is fixed in the middle of the upper end of the machine base 1. Two sets of side screw mechanisms are symmetrically slidably connected to the left and right sides of the upper end of the machine base 1. A gearbox 2 is installed at the rear end of the machine base 1. The side screw mechanisms are detachably connected to the gearbox 2. The side screw mechanisms are connected to the central screw mechanism through the gearbox 2. The central screw mechanism includes a central screw extrusion cylinder 11, a central screw 13, a central shaft 14, and a central hopper 15. The central screw extrusion cylinder 11 is fixed to the machine base 1. The interior of the central screw extrusion cylinder 11 is equipped with... A central channel 12 has open ends on both sides. A central screw 13 is installed inside the central channel 12. A central shaft 14 is fixed at the center of the central screw 13. A central hopper 15 is installed on the upper end of the central screw extrusion cylinder 11 and communicates with the central channel 12. The rear part of the central shaft 14 extends into the gearbox 2. The side screw mechanism includes a side screw extrusion cylinder 6, a side screw 8, a side shaft 9, and a side hopper 16. The side screw extrusion cylinder 6 is movably disposed above the machine base 1. One end of the side screw extrusion cylinder 6 is provided with a side channel 7. The side hopper 16 is installed on the side screw extrusion cylinder. The upper end of the side screw extrusion cylinder 6 communicates with the side channel 7. The other end of the side screw extrusion cylinder 6 is provided with a side fitting port 10. The side screw 8 is installed inside the side channel 7. The side shaft 9 is fixed at the center of the side screw 8. The rear end of the side shaft 9 movably passes through the gearbox 2. The side fitting port 10 fits with the left and right opening ends of the middle channel 12. The side channel 7 matches the middle channel 12. Because the end of the side channel 7 away from the side fitting port 10 is the opening end, when the side channel 7 faces the middle channel 12, the side screw extrusion cylinder 6 and the middle screw extrusion cylinder 11 are assembled and spliced. Thus, the side channel 7 and... The central channel 12 is open, while the side screw 8 is connected to the central screw 13. Conversely, when the side fitting port 10 faces the central channel 12, the side screw extrusion cylinder 6 is assembled and spliced ​​with the central screw extrusion cylinder 11. In this way, the side fitting port 10 fits with the central channel 12 and seals the opening of the central channel 12. At this time, the side channel 7 faces outward to facilitate cleaning of the side screw 8. Thus, according to production needs, the side fitting ports 10 or the side channels 7 of the two side screw extrusion cylinders 6 can be assembled and used with the central channel 12 to form a twin-screw extruder or a three-screw extruder, and the three-screw extruder can be used as a twin-screw extruder.

[0021] Slide seats 4 are fixed at the upper end of the machine base 1 and on both sides of the middle screw extrusion cylinder 11. A slide rail 18 is opened at the upper end of the slide seat 4. A slide table 5 is slidably connected inside the slide rail 18. An electromagnet 17 is fixedly installed at one end of the inner wall of the slide rail 18. The slide table 5 is made of iron. The upper end of the slide table 5 is fixed to the lower end of the side screw extrusion cylinder 6. When splicing the side screw extrusion cylinder 6 and the middle screw extrusion cylinder 11, the slide table 5 needs to be slid into the slide rail 18 of the slide seat 4 and the electromagnet 17 needs to be energized. In this way, the slide table 5 will be attracted by the electromagnet 17, thereby achieving the effect of tightly fitting the side screw extrusion cylinder 6 and the middle screw extrusion cylinder 11 and preventing the side screw extrusion cylinder 6 from shifting.

[0022] The gearbox 2 has guide channels 3 on both sides of the front end. The side shaft 9 passes through the guide channel 3. When splicing the side screw extrusion cylinder 6 and the middle screw extrusion cylinder 11, it is only necessary to move the side shaft 9 into the guide channel 3 so that the side shaft 9 can enter the gearbox 2.

[0023] The gearbox 2 has guide grooves 19 on both the left and right sides of its inner rear end. A bearing 20 is slidably connected inside the guide groove 19. A side rotating shaft 21 is connected to the front bearing of the bearing 20. A large side gear 22 is fixed to the outside of the side rotating shaft 21. The front end of the side rotating shaft 21 is fixed to the rear of the side shaft 9. A central rotating shaft 25 is connected to the middle bearing at the rear end of the gearbox 2. The front of the central rotating shaft 25 is fixed to the rear of the central shaft 14. A large medium gear 26 is fixed to the outside of the central rotating shaft 25. A motor is installed in the middle of the rear end of the gearbox 2. The output end of the motor is connected to the rear of the central rotating shaft 25. A shaft 23 is connected to the rear end of the gearbox 2, located between the large medium gear 26 and the large side gear 22, and a small gear 24 is fixed to the outside of the shaft 23. The large medium gear 26 and... Both the large side gears 22 and the small gears 24 are meshed. When the side shaft 9 enters the gearbox 2, the large side gears 22 will enter the gearbox 2, and at the same time, the shaft seat 20 will slide into the guide groove 19. In this way, by sliding the shaft seat 20 until the large side gears 22 and the small gears 24 mesh, the extruder can be used normally. The motor drives the central rotating shaft 25 to rotate, and the central rotating shaft 25 will drive the medium-large gear 26 to rotate. As the medium-large gear 26 meshes with the small gear 24, the small gear 24 meshes with the large side gears 22. This allows the large side gears 22 and the medium-large gears 26 to rotate synchronously, thereby making the side rotating shaft 21 and the central rotating shaft 25 rotate synchronously. At this time, the side shaft 9 will rotate synchronously with the central shaft 14, achieving the effect of synchronous rotation of the side screw 8 and the central screw 13, so that the screws can rotate normally in single, double, and triple screw states.

[0024] In summary, by setting a fixed central screw extruder 11, and then detachably installing side screw extruders 6 on both sides of the central screw extruder 11, the side screw extruders 6 and the central screw extruder 11 can be spliced ​​together to form a twin-screw extruder or a three-screw extruder. It is only necessary to rotate the installation position of the side screw extruders 6 by 180 degrees so that the side fitting port 10 matches the opening of the central channel 12. After all the side screw extruders 6 have been rotated, the central screw extruder 11 can be used alone for single-screw extrusion. Thus, the screw extruder can be used in multiple ways according to the needs of the workers, without the need to prepare multiple extruders with different screw models, saving costs.

Claims

1. A multi-functional adjustable three-screw to twin-screw extruder unit, comprising a machine base (1), characterized in that: The upper middle of the machine base (1) is fixed with a central screw mechanism, and two sets of side screw mechanisms are symmetrically slidably connected on the left and right sides of the upper end of the machine base (1). A gearbox (2) is installed at the rear end of the machine base (1). The side screw mechanism and the gearbox (2) are detachably connected. The side screw mechanism and the central screw mechanism are connected through the gearbox (2). The central screw mechanism includes a central screw extrusion cylinder (11), a central screw (13), a central shaft (14), and a central hopper (15). The central screw extrusion cylinder (11) is fixed to the machine base (1). A central channel (12) is provided inside the central screw extrusion cylinder (11). Both ends of the central channel (12) are open. The central screw (13) is installed inside the central channel (12). The central shaft (14) is fixed at the center of the central screw (13). The central hopper (15) is installed at the upper end of the central screw extrusion cylinder (11) and communicates with the central channel (12). The rear part of the central shaft (14) extends into the gearbox (2). The side screw mechanism includes a side screw extrusion cylinder (6), a side screw (8), a side shaft (9), and a side hopper (16). The side screw extrusion cylinder (6) is movably arranged above the machine base (1). One end of the side screw extrusion cylinder (6) is provided with a side channel (7). The side hopper (16) is installed on the upper end of the side screw extrusion cylinder (6) and communicates with the side channel (7). The other end of the side screw extrusion cylinder (6) is provided with a side fitting port (10). The side screw (8) is installed inside the side channel (7). The side shaft (9) is fixed at the center of the side screw (8). The rear end of the side shaft (9) is movably connected to the gearbox (2). The side fitting port (10) fits into the left and right opening ends of the middle channel (12). The side channel (7) matches the middle channel (12).

2. The multifunctional adjustable three-screw to twin-screw extruder unit according to claim 1, characterized in that: The upper end of the machine base (1) and the left and right sides of the middle screw extrusion cylinder (11) are both fixed with slide blocks (4). The upper end of the slide block (4) has a slide rail (18). The slide rail (18) is slidably connected to the slide table (5). An electromagnet (17) is fixedly installed on one end of the inner wall of the slide rail (18). The slide table (5) is made of iron. The upper end of the slide table (5) is fixed to the lower end of the side screw extrusion cylinder (6).

3. The multifunctional adjustable three-screw to twin-screw extruder unit according to claim 2, characterized in that: The gearbox (2) has guide channels (3) on both sides of its front end, and the side shaft (9) passes through the guide channels (3).

4. The multifunctional adjustable three-screw to twin-screw extruder unit according to claim 3, characterized in that: The gearbox (2) has guide grooves (19) on both the left and right sides of the rear end of the inner wall. A shaft seat (20) is slidably connected inside the guide groove (19). A side rotating shaft (21) is connected to the front bearing of the shaft seat (20). A side large gear (22) is fixed outside the side rotating shaft (21). The front end of the side rotating shaft (21) is fixed to the rear of the side shaft (9).

5. A multifunctional adjustable three-screw to twin-screw extruder unit according to claim 4, characterized in that: The gearbox (2) has a central bearing at the rear end of its inner wall connected to a rotating shaft (25). The front of the rotating shaft (25) is fixed to the rear of the central shaft (14). A medium-sized gear (26) is fixed to the outside of the rotating shaft (25). A motor is installed in the middle of the rear end of the gearbox (2). The output end of the motor is connected to the rear of the rotating shaft (25).

6. A multifunctional adjustable three-screw to twin-screw extruder unit according to claim 5, characterized in that: The gearbox (2) has a shaft (23) at the rear end of the inner wall and between the medium-sized gear (26) and the side-sized gear (22). A small gear (24) is fixed to the outside of the shaft (23). The medium-sized gear (26) and the side-sized gear (22) are both meshed with the small gear (24).

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