Exhaust type single-screw extruder

Abstract

The invention relates to the technical field of single-screw extruders, in particular to an exhaust type single-screw extruder which comprises a base station, a rack device, an inner sleeve device and an outer sleeve device, the interior of an inner screw, the interior of a conical cylinder, the interior of a sleeve and the interior of a guide cylinder are communicated, and sucked air is subjected to water-proof ventilation treatment through a nanofiber membrane bag; a rubber ring arranged in the sleeve and the guide cylinder are installed in a sliding mode, the interior of the guide cylinder and the interior of the sleeve are assembled through external studs in a threaded mode, the interior of the fourth flange plate and the interior of the second ring plate are assembled through external studs in a threaded mode, and the interior of the fifth flange plate and the interior of the third flange plate are assembled through external studs in a threaded mode. The device body conducts exhaust treatment on bubbles in the plastic solution through the screw assembly inner cavity, an integrated exhaust type assembly of the single-screw extruder is formed, the internal space of the device is saved, the device body is convenient to assemble and combine, and the internal assemblies are easy to replace and maintain regularly.

Description

Technical Field

[0001] The present invention relates to the technical field of single-screw extruders, and specifically to an exhaust single-screw extruder. Background Art

[0002] Single-screw extruders are mainly used for extruding thermoplastic plastics such as polyvinyl chloride and polyethylene, and can process various plastic products, such as pipe extrusion, plate pressing, etc. Taking the exhaust single-screw extruder as an example, by defoaming the molten plastic solution, the quality of the subsequent extruded finished products can be improved.

[0003] For some exhaust single-screw extruders, the main body of the device is not convenient for exhausting the bubbles inside the plastic solution through the screw assembly, resulting in a low integration level of the exhaust components of the single-screw extruder, and insufficient mixing and feeding space inside the device. Therefore, an exhaust single-screw extruder is proposed to solve the above problems. Summary of the Invention

[0004] The purpose of the present invention is to provide an exhaust single-screw extruder to solve the problem that for some exhaust single-screw extruders, the main body of the device is not convenient for exhausting the bubbles inside the plastic solution through the screw assembly, resulting in a low integration level of the exhaust components of the single-screw extruder, and insufficient mixing and feeding space inside the device.

[0005] To achieve the above purpose, the present invention provides the following technical solutions:

[0006] An exhaust single-screw extruder includes a base, a frame device, an inner sleeve device, and an outer sleeve device. The frame device is provided at the top of the base. The inner sleeve device, the outer sleeve device, and a conical cylinder are provided on the left side of the frame device. A sleeve is fixedly provided at the right end of the conical cylinder. An inner screw is fixedly provided at the left end of the conical cylinder. A first breathable plate is fixedly provided between the conical cylinder and the inner screw. An outer screw is fixedly provided at the left end of the inner screw. A second breathable plate is fixedly provided between the inner screw and the outer screw. The frame device includes a disc frame, a stepping motor, a first flange, a second flange, a guide cylinder, a first ring plate, a first buckle plate, a second ring plate, a second buckle plate, a connecting cylinder, a discharge pipe, a vacuum exhaust device, a cavity box, and a nanofiber membrane bag. The bottom end of the disc frame is fixedly provided with the top end of the base. The stepping motor is fixedly provided inside the disc frame. The end of the main shaft of the stepping motor is fixedly provided with a first flange. The first flange and the second flange are threadedly assembled through external studs. A guide cylinder is fixedly provided at the left end of the second flange. A first ring plate is fixedly provided inside the disc frame. A first buckle plate is fixedly provided inside the first ring plate. A second ring plate is provided at the left end of the first ring plate. A second buckle plate is fixedly provided inside the second ring plate. The guide cylinder is rotatably provided with rubber rings provided inside the first buckle plate and rubber rings provided inside the second buckle plate. A connecting cylinder is fixedly provided between the first ring plate and the second ring plate. A discharge pipe is fixedly provided at the top end of the connecting cylinder. A vacuum exhaust device is fixedly provided at the top end of the disc frame. A cavity box is provided between the discharge pipe and the vacuum exhaust device. A nanofiber membrane bag is fixedly provided inside the cavity box. The right hard pipe of the discharge pipe is fixedly provided with the left end of the cavity box. The left hard pipe of the vacuum exhaust device is fixedly provided with the right end of the cavity box and the right end of the nanofiber membrane bag.

[0007] Preferably, the inner sleeve device includes an inner cylinder, a third flange, a fourth flange, a silica gel sleeve, a first ring plate, and a first heating plate. A third flange is fixedly provided at the left end of the inner cylinder. A fourth flange is fixedly provided at the right end of the inner cylinder. A silica gel sleeve is fixedly provided inside the inner cylinder. A first ring plate is provided outside the inner cylinder. A first heating plate is fixedly provided inside the first ring plate. The inner cylinder and the first ring plate are threadedly assembled through external studs.

[0008] Preferably, the outer sleeve device is provided on the left side of the inner sleeve device. The outer sleeve device includes an outer cylinder, a fifth flange, a second ring plate, and a second heating plate. A fifth flange is fixedly provided at the right end of the outer cylinder. A second ring plate is provided outside the outer cylinder. A second heating plate is fixedly provided inside the second ring plate. The outer cylinder and the second ring plate are threadedly assembled through external studs.

[0009] Preferably, the rubber ring provided inside the sleeve is slidably installed with the guide cylinder. The guide cylinder and the sleeve are threadedly assembled through external studs.

[0010] Preferably, the rubber pad arranged at the right end of the fourth flange is in close contact with the rubber pad arranged at the left end of the second ring disk, the interior of the silicone sleeve is slidably installed with the cone, and the interior of the fourth flange and the interior of the second ring disk are assembled and arranged by external stud threads.

[0011] Preferably, the rubber pad arranged at the right end of the fifth flange is in close contact with the rubber pad arranged at the left end of the third flange, and the interior of the fifth flange and the interior of the third flange are assembled by external stud threads.

[0012] Preferably, an extrusion injection molding template is installed at the left end of the outer cylinder, and an injection molding blanking device is fixedly installed at the top of the inner cylinder.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] 1. In the present invention, the first air permeable plate and the second air permeable plate both adopt a composite structure of a microporous alloy plate and an air permeable fiber cloth, which greatly improves the penetration resistance of the viscous plastic solution. When the bubbles of the heated and molten viscous plastic solution are extracted and eliminated, the viscous plastic solution can be prevented from passing through the first air permeable plate, the second air permeable plate, the inner screw, the cone, the sleeve and the guide tube, which are connected. The sucked air passes through the nanofiber membrane bag for water-proof and air-permeable treatment, and the isolated water is discharged through the bottom pipe of the cavity box after gathering. Through the above arrangement, the main body of the device exhausts the bubbles in the plastic solution through the inner cavity of the screw assembly, forming an integrated exhaust assembly of the single screw extruder, saving the internal space of the device and increasing the mixing and feeding space inside the device;

[0015] 2. In the present invention, the rubber ring arranged inside the sleeve is slidably installed with the guide tube, the inside of the guide tube and the inside of the sleeve are assembled through external stud threads, the inside of the silicone sleeve and the cone tube are slidably installed, the inside of the fourth flange and the inside of the second ring disk are assembled through external stud threads, and the inside of the fifth flange and the inside of the third flange are assembled through external stud threads. Through the above arrangements, the main body of the device is convenient to assemble and combine, and it is easy to replace and maintain the internal components regularly. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0017] Figure 2 It is a schematic cross-sectional structure diagram of the inner sleeve device and the outer sleeve device of the present invention;

[0018] Figure 3 It is a schematic cross-sectional structure diagram of some components of the rack device of the present invention;

[0019] Figure 4 For the present invention Figure 3 A schematic diagram of the enlarged structure at point A;

[0020] Figure 5 Schematic cross-sectional structure diagram of the conical cylinder, sleeve, inner screw, first air-permeable plate, outer screw and second air-permeable plate of the present invention;

[0021] Figure 6 Schematic cross-sectional structure diagram of some components of the inner sleeve device of the present invention;

[0022] Figure 7 Schematic cross-sectional structure diagram of some components of the outer sleeve device of the present invention;

[0023] Figure 8 Schematic position structure diagram of the guide cylinder and the sleeve of the present invention.

[0024] In the figure: 1. Base; 2. Frame device; 201. Disc frame; 202. Stepper motor; 203. First flange; 204. Second flange; 205. Guide cylinder; 206. First ring plate; 207. First snap plate; 208. Second ring plate; 209. Second snap plate; 210. Connecting cylinder; 211. Drain pipe; 212. Vacuum exhaust device; 213. Chamber box; 214. Nanofiber membrane bag; 3. Inner sleeve device; 31. Inner cylinder; 32. Third flange; 33. Fourth flange; 34. Silicone sleeve; 35. First ring plate; 36. First heating plate; 4. Outer sleeve device; 41. Outer cylinder; 42. Fifth flange; 43. Second ring plate; 44. Second heating plate; 5. Conical cylinder; 6. Sleeve; 7. Inner screw; 8. First air-permeable plate; 9. Outer screw; 10. Second air-permeable plate. Detailed implementation manners

[0025] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0026] In the embodiments of the present invention, it should be noted that the orientation or positional relationship indicated by terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the position or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation of the present invention. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. Similarly, words such as "a", "an" or "the" do not indicate a quantity limitation but mean that there is at least one. Words such as "comprising" or "including" mean that the element or object appearing before the word covers the element or object listed after the word and its equivalents, without excluding other elements or objects.

[0027] In addition, in the embodiments of the present invention, unless otherwise clearly specified and limited, the terms "mounted", "connected" and "connected" shall be understood in a broad sense. For example, it can be a fixed connection, a detachable connection or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0028] Please refer to Figures 1-8 , the present invention provides a technical solution:

[0029] An exhaust single-screw extruder includes a base 1, a frame device 2, an inner sleeve device 3, and an outer sleeve device 4. A frame device 2 is provided at the top of the base 1. An inner sleeve device 3, an outer sleeve device 4, and a conical cylinder 5 are provided on the left side of the frame device 2. A sleeve 6 is fixedly provided at the right end of the conical cylinder 5. An inner screw 7 is fixedly provided at the left end of the conical cylinder 5. A first breathable plate 8 is fixedly provided between the conical cylinder 5 and the inner screw 7. An outer screw 9 is fixedly provided at the left end of the inner screw 7. A second breathable plate 10 is fixedly provided between the inner screw 7 and the outer screw 9. The frame device 2 includes a disc frame 201, a stepping motor 202, a first flange 203, a second flange 204, a guide cylinder 205, a first ring plate 206, a first buckle plate 207, a second ring plate 208, a second buckle plate 209, a connecting cylinder 210, a discharge pipe 211, a vacuum exhaust device 212, a chamber box 213, and a nanofiber membrane bag 214. The bottom end of the disc frame 201 is fixedly provided with the top end of the base 1. A stepping motor 202 is fixedly provided inside the disc frame 201. The end of the main shaft of the stepping motor 202 is fixedly provided with a first flange 203. The inside of the first flange 203 and the inside of the second flange 204 are threadedly assembled through external studs. The left end of the second flange 204 is fixedly provided with a guide cylinder 205. A first ring plate 206 is fixedly provided inside the disc frame 201. A first buckle plate 207 is fixedly provided inside the first ring plate 206. A second ring plate 208 is provided at the left end of the first ring plate 206. A second buckle plate 209 is fixedly provided inside the second ring plate 208. The guide cylinder 205 is rotatably provided with rubber rings provided inside the first buckle plate 207 and rubber rings provided inside the second buckle plate 209. A connecting cylinder 210 is fixedly provided between the first ring plate 206 and the second ring plate 208. The top end of the connecting cylinder 210 is fixedly provided with a discharge pipe 211. A vacuum exhaust device 212 is fixedly provided at the top end of the disc frame 201. A chamber box 213 is provided between the discharge pipe 211 and the vacuum exhaust device 212. A nanofiber membrane bag 214 is fixedly provided inside the chamber box 213. The right hard pipe of the discharge pipe 211 is fixedly provided with the left end of the chamber box 213. The left hard pipe of the vacuum exhaust device 212 is fixedly provided with the right end of the chamber box 213 and the right end of the nanofiber membrane bag 214.

[0030] The inner sleeve device 3 includes an inner cylinder 31, a third flange 32, a fourth flange 33, a silica gel sleeve 34, a first ring plate 35, and a first heating plate 36. A third flange 32 is fixedly provided at the left end of the inner cylinder 31. A fourth flange 33 is fixedly provided at the right end of the inner cylinder 31. A silica gel sleeve 34 is fixedly provided inside the inner cylinder 31. A first ring plate 35 is provided outside the inner cylinder 31. A first heating plate 36 is fixedly provided inside the first ring plate 35. The inner cylinder 31 and the first ring plate 35 are threadedly assembled through external studs. Through the above settings, a joint pipe type inner sleeve device 3 is formed.

[0031] On the left side of the inner sleeve device 3, there is an outer sleeve device 4. The outer sleeve device 4 includes an outer cylinder 41, a fifth flange 42, a second ring plate 43, and a second heating plate 44. At the right end of the outer cylinder 41, the fifth flange 42 is fixedly arranged. On the outside of the outer cylinder 41, the second ring plate 43 is arranged. Inside the second ring plate 43, the second heating plate 44 is fixedly arranged. The outer cylinder 41 and the inside of the second ring plate 43 are assembled by external studs in a threaded manner. Through the above settings, a joint tube type outer sleeve device 4 is formed.

[0032] The rubber ring arranged inside the sleeve 6 is slidably installed with the guide cylinder 205. The inside of the guide cylinder 205 and the inside of the sleeve 6 are assembled by external studs in a threaded manner. Through the above settings, it is convenient to assemble and combine the screw rod assembly.

[0033] The rubber pad arranged at the right end of the fourth flange 33 is in close contact with the rubber pad arranged at the left end of the second ring plate 208. The inside of the silica gel sleeve 34 is slidably installed with the conical cylinder 5. The inside of the fourth flange 33 and the inside of the second ring plate 208 are assembled by external studs in a threaded manner. Through the above settings, it is convenient to assemble and combine the inner sleeve device 3 and the frame device 2.

[0034] The rubber pad arranged at the right end of the fifth flange 42 is in close contact with the rubber pad arranged at the left end of the third flange 32. The inside of the fifth flange 42 and the inside of the third flange 32 are assembled by external studs in a threaded manner. Through the above settings, it is convenient to assemble and combine the inner sleeve device 3 and the outer sleeve device 4.

[0035] An extrusion injection mold is installed at the left end of the outer cylinder 41, and an injection feeding device is fixedly arranged at the top of the inner cylinder 31. Through the above settings, the injection feeding device inputs plastic pellets into the inner cylinder 31, and the heated and melted viscous plastic solution is extruded and discharged through the extrusion injection mold installed at the left end of the outer cylinder 41.

[0036] Working process: The present invention provides an exhaust type single screw extruder. The device main body exhausts the air bubbles inside the plastic solution through the inner cavity of the screw rod assembly, forming an integrated exhaust type assembly of the single screw extruder, saving the internal space of the device, increasing the internal mixing and feeding space of the device, and the device main body is convenient for assembly and combination, and is easy to regularly replace and maintain the internal components.

[0037] The stepping motor 202, vacuum exhaust device 212, first heating plate 36, and second heating plate 44 arranged inside the device are controlled by an external PLC controller, and the above-mentioned stepping motor 202, vacuum exhaust device 212, first heating plate 36, and second heating plate 44 are electrically connected to an external power supply. Among them, the first heating plate 36 and the second heating plate 44 are both common plate heaters, and the vacuum exhaust device 212 is a common Roots vacuum pump device.

[0038] First, the frame device 2 is assembled and combined with the cone cylinder 5, the sleeve 6, the inner screw 7, the first air permeable plate 8, the outer screw 9, and the second air permeable plate 10. The rubber ring arranged inside the sleeve 6 is slidably installed with the guide cylinder 205, and the inside of the guide cylinder 205 and the inside of the sleeve 6 are assembled through external stud threads. Then, the inner sleeve device 3 is assembled and combined, the rubber pad arranged at the right end of the fourth flange 33 is in contact with the rubber pad arranged at the left end of the second ring disk 208, the inside of the silicone sleeve 34 is slidably installed with the cone cylinder 5, the inside of the fourth flange 33 and the inside of the second ring disk 208 are assembled through external stud threads, and finally, the outer sleeve device 4 is assembled and combined, the rubber pad arranged at the right end of the fifth flange 42 is in contact with the rubber pad arranged at the left end of the third flange 32, and the inside of the fifth flange 42 and the inside of the third flange 32 are assembled through external stud threads.

[0039] The plastic pellets are fed into the inner cylinder 31 through the injection molding feeding device, and the stepping motor 202, the vacuum exhaust device 212, the first heating plate 36, and the second heating plate 44 are started. The first air permeable plate 8 and the second air permeable plate 10 are both made of a composite structure of a microporous alloy plate and an air permeable fiber cloth, which greatly improves the penetration resistance of the viscous plastic solution. When the bubbles of the heated and molten viscous plastic solution are extracted and eliminated, the viscous plastic solution can be prevented from penetrating the first air permeable plate 8 and the second air permeable plate 10 as much as possible. The inner part, the inside of the cone 5, the inside of the sleeve 6 and the inside of the guide tube 205 are connected. The internal slot of the guide tube 205 is connected with the inside of the connecting tube 210, the inside of the discharge pipe 211 and the inside of the cavity box 213. The sucked air passes through the nanofiber membrane bag 214 for water-proof and breathable treatment. The isolated water is gathered and discharged through the bottom pipe of the cavity box 213. The hard pipe at the left end of the vacuum exhaust device 212 is fixedly connected with the right end of the cavity box 213 and the right end of the nanofiber membrane bag 214, and the air is discharged through the hard pipe at the right end of the vacuum exhaust device 212.

[0040] 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. An exhaust single-screw extruder, comprising a base (1), a frame device (2), an inner sleeve device (3) and an outer sleeve device (4), characterized in that: At the top of the base (1), a frame device (2) is provided. On the left side of the frame device (2), an inner sleeve device (3), an outer sleeve device (4), and a conical cylinder (5) are provided. At the right end of the conical cylinder (5), a sleeve (6) is fixedly provided. At the left end of the conical cylinder (5), an inner screw rod (7) is fixedly provided. Between the conical cylinder (5) and the inner screw rod (7), a first air-permeable plate (8) is fixedly provided. At the left end of the inner screw rod (7), an outer screw rod (9) is fixedly provided. Between the inner screw rod (7) and the outer screw rod (9), a second air-permeable plate (10) is fixedly provided. The frame device (2) includes a disc frame (201), a stepping motor (202), a first flange (203), a second flange (204), a guide cylinder (205), a first ring plate (206), a first buckle plate (207), a second ring plate (208), a second buckle plate (209), a connecting cylinder (210), a drain pipe (211), a vacuum exhaust device (212), a chamber box (213), and a nanofiber membrane bag (214). The bottom end of the disc frame (201) is fixedly provided with the top end of the base (1). Inside the disc frame (201), a stepping motor (202) is fixedly provided. At the end of the main shaft of the stepping motor (202), a first flange (203) is fixedly provided. Inside the first flange (203) and inside the second flange (204), they are assembled by external studs in a threaded manner. At the left end of the second flange (204), a guide cylinder (205) is fixedly provided. Inside the disc frame (201), a first ring plate (206) is fixedly provided. Inside the first ring plate (206), a first buckle plate (207) is fixedly provided. At the left end of the first ring plate (206), a second ring plate (208) is provided. Inside the second ring plate (208), a second buckle plate (209) is fixedly provided. The guide cylinder (205) is rotatably provided with rubber rings provided inside the first buckle plate (207) and rubber rings provided inside the second buckle plate (209). Between the first ring plate (206) and the second ring plate (208), a connecting cylinder (210) is fixedly provided. At the top end of the connecting cylinder (210), a drain pipe (211) is fixedly provided. At the top end of the disc frame (201), a vacuum exhaust device (212) is fixedly provided. Between the drain pipe (211) and the vacuum exhaust device (212), a chamber box (213) is provided. Inside the chamber box (213), a nanofiber membrane bag (214) is fixedly provided. The right hard pipe of the drain pipe (211) is fixedly provided with the left end of the chamber box (213). The left hard pipe of the vacuum exhaust device (212) is fixedly provided with the right end of the chamber box (213) and the right end of the nanofiber membrane bag (214).

2. The exhaust single-screw extruder according to claim 1, wherein: The inner sleeve device (3) includes an inner cylinder (31), a third flange (32), a fourth flange (33), a silica gel sleeve (34), a first ring plate (35), and a first heating plate (36). The third flange (32) is fixedly arranged at the left end of the inner cylinder (31), the fourth flange (33) is fixedly arranged at the right end of the inner cylinder (31), the silica gel sleeve (34) is fixedly arranged inside the inner cylinder (31), the first ring plate (35) is arranged outside the inner cylinder (31), the first heating plate (36) is fixedly arranged inside the first ring plate (35), and the inner cylinder (31) and the inside of the first ring plate (35) are assembled by external studs in a threaded manner.

3. The exhaust single-screw extruder according to claim 2, wherein: The outer sleeve device (4) is arranged on the left side of the inner sleeve device (3). The outer sleeve device (4) includes an outer cylinder (41), a fifth flange (42), a second ring plate (43), and a second heating plate (44). The fifth flange (42) is fixedly arranged at the right end of the outer cylinder (41), the second ring plate (43) is arranged outside the outer cylinder (41), the second heating plate (44) is fixedly arranged inside the second ring plate (43), and the outer cylinder (41) and the inside of the second ring plate (43) are assembled by external studs in a threaded manner.

4. The exhaust single-screw extruder according to claim 1, wherein: The rubber ring arranged inside the sleeve (6) is slidably installed with the guide cylinder (205), and the inside of the guide cylinder (205) and the inside of the sleeve (6) are assembled by external studs in a threaded manner.

5. The exhaust single-screw extruder according to claim 2, characterized in that: The rubber pad arranged at the right end of the fourth flange (33) is in close contact with the rubber pad arranged at the left end of the second ring plate (208). The inside of the silica gel sleeve (34) is slidably installed with the conical cylinder (5), and the inside of the fourth flange (33) and the inside of the second ring plate (208) are assembled by external studs in a threaded manner.

6. The exhaust single-screw extruder according to claim 3, characterized in that: The rubber pad arranged at the right end of the fifth flange (42) is in close contact with the rubber pad arranged at the left end of the third flange (32). The inside of the fifth flange (42) and the inside of the third flange (32) are assembled by external studs in a threaded manner.

7. The exhaust single-screw extruder according to claim 3, characterized in that: An extrusion injection molding template is installed at the left end of the outer cylinder (41), and an injection molding feeding device is fixedly arranged at the top of the inner cylinder (31).

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