Single-screw extrusion device

Abstract

The utility model discloses a single-screw extrusion device, which relates to the technical field of single-screw extruders and comprises a base, the upper surface of the base is fixedly connected with an extrusion cylinder, the upper surface of the extrusion cylinder is fixedly connected with a flow limiting cylinder, the inner top surface of the flow limiting cylinder is rotatably connected with a second rotating shaft, and the side surface of the second rotating shaft is fixedly connected with a plurality of partition plates. The left side of the upper wall of the flow limiting cylinder is communicated with a second material pipe, the upper end of the second material pipe is provided with a mixing cylinder, the inner top surface of the mixing cylinder is rotatably connected with a first rotating shaft, and the side surface of the first rotating shaft is fixedly connected with a plurality of stirring rods. According to the invention, the materials can be mixed without using extra mixing equipment before feeding, the flow speed of the materials can be effectively controlled by controlling the revolution speed of the partition plate, and the problems of material blockage caused by non-uniform feeding or non-uniform heating caused by accumulation of the materials when the materials enter the extrusion cylinder due to excessive feeding amount are prevented.

Description

Technical Field

[0001] The utility model relates to the technical field of single-screw extruders, in particular to a single-screw extruder device. Background Art

[0002] As a common extrusion equipment, single screw extruder is used in plastic processing. Single screw extruder is mainly used to extrude soft and hard polyvinyl chloride, polyethylene and other thermoplastic plastics. It can process a variety of plastic products, such as film blowing, tube extrusion, press plate, ribbon drawing, etc. It can also be used for melt granulation.

[0003] For example, in the utility model patent with announcement number CN206406428U, a single-screw extruder is disclosed, which includes a transmission assembly and a barrel, in which a screw connected to the output end of the transmission assembly is arranged in the barrel, a die head is arranged at the head of the screw, and a feed hopper is arranged above the barrel.

[0004] However, when in use, the utility model cannot effectively control the flow rate of the material, resulting in uneven feeding, which can easily cause material blockage, or excessive feed amount causes the material to accumulate when entering the single-screw extruder, resulting in uneven heating, affecting product quality. In addition, the utility model cannot mix the material, and additional mixing equipment is required to mix the material before feeding, which increases the cost and site space occupied, and the use effect is not good. Utility Model Content

[0005] In view of the deficiencies of the prior art, the utility model provides a single-screw extruder to solve the problems raised in the above background technology.

[0006] To achieve the above objectives, the utility model is implemented through the following technical solutions: a single-screw extruder, including a machine base, an extrusion barrel is fixedly connected to the upper surface of the machine base, an extrusion screw is rotatably connected to the inner surface of the right wall of the extrusion barrel, a heating element is arranged in the side wall of the extrusion barrel, a third material pipe is connected to the right side of the upper wall of the extrusion barrel, a flow limiting barrel is fixedly connected to the upper surface of the extrusion barrel, the right side of the bottom surface of the flow limiting barrel is connected to the third material pipe, a second rotating shaft is rotatably connected to the top surface of the flow limiting barrel, a plurality of partitions are fixedly connected to the side surface of the second rotating shaft, a reduction motor is fixedly connected to the upper surface of the flow limiting barrel, and a motor on the upper surface of the second rotating shaft The end passes through the upper wall of the flow-limiting cylinder and is fixedly connected to the driving end of the reduction motor, the left side of the upper wall of the flow-limiting cylinder is connected to a second material pipe, a valve is installed on the second material pipe, a mixing cylinder is provided on the upper end of the second material pipe, the bottom surface of the mixing cylinder is connected to the upper end of the second material pipe, the top surface of the mixing cylinder is rotatably connected to the first rotating shaft, a plurality of stirring rods are fixedly connected to the side surface of the first rotating shaft, the upper surface of the mixing cylinder is fixedly connected to the first motor, the upper end of the first rotating shaft passes through the upper wall of the mixing cylinder and is fixedly connected to the driving end of the first motor, the upper wall of the mixing cylinder is connected to the first material pipe, and a driving assembly is provided on the right surface of the extrusion cylinder.

[0007] Preferably, the driving assembly includes a reducer, which is fixedly connected to the right surface of the extrusion barrel, the right end of the extrusion screw passes through the right wall of the extrusion barrel and is fixedly connected to the output end of the reducer, a second motor is installed on the reducer, and the driving end of the second motor is fixedly connected to the input end of the reducer.

[0008] Preferably, a propeller is fixedly connected to the lower end of the first rotating shaft.

[0009] Preferably, the left end of the extrusion barrel is fixedly connected with an extrusion head.

[0010] Beneficial Effects

[0011] The utility model provides a single screw extruder, which has the following beneficial effects:

[0012] 1. The materials can be stirred and mixed by the revolution of multiple stirring rods, and there is no need to use additional mixing equipment to mix the materials before loading, which reduces the cost and the occupied space of the site;

[0013] 2. The rotation of the propeller can move the materials at the bottom upwards, preventing the high-density materials from accumulating at the bottom, improving the stirring effect and making the stirring more uniform;

[0014] 3. By controlling the speed of the partition's revolution, the flow rate of the material can be effectively controlled to prevent uneven feeding from causing material blockage, or excessive feed causing accumulation of materials when entering the extruder, resulting in uneven heating and affecting product quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is the front view of the utility model;

[0016] Figure 2 It is a top view of the partition in the utility model.

[0017] In the figure: 1. machine base; 2. extrusion screw; 3. extrusion head; 4. heating element; 5. extrusion barrel; 6. mixing barrel; 7. first rotating shaft; 8. first motor; 9. first material pipe; 10. stirring rod; 11. propeller; 12. valve; 13. second material pipe; 14. reduction motor; 15. second rotating shaft; 16. flow limiting barrel; 17. partition; 18. third material pipe; 19. reduction gear; 20. second motor. DETAILED DESCRIPTION

[0018] The technical solution of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0019] Directional terms mentioned in the present invention, such as "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., are only with reference to the directions shown in the drawings. The directional terms used are used to illustrate and understand the present invention, rather than to indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0020] See also Figure 1-2The utility model provides a technical solution: a single-screw extruder comprises a machine base 1, an extrusion barrel 5 is fixedly connected to the upper surface of the machine base 1, an extrusion screw 2 is rotatably connected to the inner surface of the right wall of the extrusion barrel 5, a heating element 4 is arranged in the side wall of the extrusion barrel 5, a third material pipe 18 is connected to the right side of the upper wall of the extrusion barrel 5, a flow limiting barrel 16 is fixedly connected to the upper surface of the extrusion barrel 5, the right side of the bottom surface of the flow limiting barrel 16 is connected to the third material pipe 18, a second rotating shaft 15 is rotatably connected to the top surface of the flow limiting barrel 16, a plurality of partitions 17 are fixedly connected to the side surface of the second rotating shaft 15, a reduction motor 14 is fixedly connected to the upper surface of the flow limiting barrel 16, the upper end of the second rotating shaft 15 passes through the upper wall of the flow limiting barrel 16 and is fixedly connected to the driving end of the reduction motor 14, a second material pipe 13 is connected to the left side of the upper wall of the flow limiting barrel 16, a valve 12 is installed on the second material pipe 13, and the upper end of the second material pipe 13 A mixing barrel 6 is provided, the bottom surface of the mixing barrel 6 is connected to the upper end of the second material pipe 13, the inner top surface of the mixing barrel 6 is rotatably connected to the first rotating shaft 7, the side surface of the first rotating shaft 7 is fixedly connected to a plurality of stirring rods 10, the upper surface of the mixing barrel 6 is fixedly connected to the first motor 8, the upper end of the first rotating shaft 7 penetrates the upper wall of the mixing barrel 6 and is fixedly connected to the driving end of the first motor 8, the upper wall of the mixing barrel 6 is connected to the first material pipe 9, and a driving assembly is provided on the right surface of the extrusion barrel 5; the driving assembly includes a reducer 19, the reducer 19 is fixedly connected to the right surface of the extrusion barrel 5, the right end of the extrusion screw 2 penetrates the right wall of the extrusion barrel 5 and is fixedly connected to the output end of the reducer 19, the reducer 19 is installed with a second motor 20, and the driving end of the second motor 20 is fixedly connected to the input end of the reducer 19; the lower end of the first rotating shaft 7 is fixedly connected to a propeller 11; the left end of the extrusion barrel 5 is fixedly connected to an extrusion head 3.

[0021] Through the personnel in this field, all the electrical components in this case are electrically connected to their corresponding power supplies, and a suitable controller should be selected according to the actual situation to meet the control requirements. The specific connection and control sequence should refer to the working sequence between the electrical components in the following working principle to complete the electrical connection. The detailed connection means are well-known technologies in this field. The following mainly introduces the working principle and process, and no longer explains the electrical control.

[0022] Embodiment: According to the specification attached Figure 1-2It can be seen that when in use, the material is put into the mixing drum 6 through the first material pipe 9, and the first motor 8 can be started to drive the first shaft 7 to rotate. The rotation of the first shaft 7 can drive the multiple stirring rods 10 to revolve and the propeller 11 to rotate. The materials can be stirred and mixed through the revolution of the multiple stirring rods 10, and there is no need to use additional mixing equipment to mix the materials before feeding, which reduces the cost and the occupied space of the site. The rotation of the propeller 11 can make the materials at the bottom move upward to prevent the accumulation of high-density materials at the bottom, improve the stirring effect, and make the stirring more uniform. Opening the valve 12 can allow the evenly stirred materials to enter the flow limiting drum 16 through the second material pipe 13, and starting the reduction motor 14 can drive the second shaft 15 to rotate. The second rotating shaft 15 can drive the multiple partitions 17 to revolve, and the multiple partitions 17 can revolve to transfer the left material to the right and enter the extrusion barrel 5 through the third material pipe 18 by rotating the reduction motor 14. The speed of the partition 17 revolution can be controlled by controlling the rotation speed of the reduction motor 14. The flow rate of the material can be effectively controlled by controlling the speed of the partition 17 revolution to prevent uneven feeding from causing material blockage, or excessive feeding amount from causing accumulation of materials when entering the extrusion barrel 5, resulting in uneven heating, affecting product quality and other problems. The material can be melted by the heating element 4, and the second motor 20 can be started to drive the extrusion screw 2 to rotate. The melted material can be transported to the extrusion head 3 and extruded from the extrusion head 3 by rotating the extrusion screw 2.

[0023] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A single screw extruder, characterized in that: The invention comprises a machine base (1), wherein an extrusion barrel (5) is fixedly connected to the upper surface of the machine base (1), an extrusion screw (2) is rotatably connected to the inner surface of the right wall of the extrusion barrel (5), a heating element (4) is arranged inside the side wall of the extrusion barrel (5), a third material pipe (18) is connected to the right side of the upper wall of the extrusion barrel (5), a flow limiting barrel (16) is fixedly connected to the upper surface of the extrusion barrel (5), the right side of the bottom surface of the flow limiting barrel (16) is connected to the third material pipe (18), a second rotating shaft (15) is rotatably connected to the top surface of the flow limiting barrel (16), a plurality of partitions (17) are fixedly connected to the side surface of the second rotating shaft (15), a reduction motor (14) is fixedly connected to the upper surface of the flow limiting barrel (16), and the upper end of the second rotating shaft (15) passes through the upper wall of the flow limiting barrel (16) and is connected to the reduction motor The limiting cylinder (16) is fixedly connected to the driving end thereof; the left side of the upper wall of the limiting cylinder (16) is connected to a second material pipe (13); a valve (12) is installed on the second material pipe (13); a mixing cylinder (6) is provided at the upper end of the second material pipe (13); the bottom surface of the mixing cylinder (6) is connected to the upper end of the second material pipe (13); a first rotating shaft (7) is rotatably connected to the inner top surface of the mixing cylinder (6); a plurality of stirring rods (10) are fixedly connected to the side surface of the first rotating shaft (7); a first motor (8) is fixedly connected to the upper surface of the mixing cylinder (6); the upper end of the first rotating shaft (7) penetrates the upper wall of the mixing cylinder (6) and is fixedly connected to the driving end of the first motor (8); the upper wall of the mixing cylinder (6) is connected to the first material pipe (9); and a driving assembly is provided on the right surface of the extrusion cylinder (5).

2. A single screw extruder according to claim 1, characterized in that: The driving assembly comprises a reducer (19), wherein the reducer (19) is fixedly connected to the right surface of the extrusion barrel (5), the right end of the extrusion screw (2) passes through the right wall of the extrusion barrel (5) and is fixedly connected to the output end of the reducer (19), and a second motor (20) is installed on the reducer (19), and the driving end of the second motor (20) is fixedly connected to the input end of the reducer (19).

3. A single screw extruder according to claim 1, characterized in that: The lower end of the first rotating shaft (7) is fixedly connected to a propeller (11).

4. A single screw extruder according to claim 1, characterized in that: The left end of the extrusion cylinder (5) is fixedly connected to an extrusion head (3).

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