Screw extruder

Abstract

The utility model discloses a screw extruder, and relates to the field of extruders, the screw extruder comprises an extruder shell and a feeding mechanism mounted on the extruder shell, the feeding mechanism comprises a feeding pipe mounted on a feeding port of the extruder shell, the outer wall of the top of the feeding pipe is fixedly connected with a feeding hopper, and the inner walls of the two sides of the feeding pipe are rotatably connected with the same driving roller; and a driving assembly for driving the driving roller to rotate is mounted on the extruder shell. According to the screw extruder, the feeding mechanism is arranged on the extruder shell, and when the driving roller in the feeding pipe in the feeding mechanism rotates, raw materials are conveyed into the extruder through the arc-shaped groove, so that the feeding rate of the extruder is conveniently controlled, and the problem that an existing screw extruder is easily blocked during feeding is solved.

Description

Technical Field

[0001] This application relates to the field of extruders, and particularly to a screw extruder. Background Art

[0002] Extruders are widely used in the production of products such as plastics and rubbers. Plastic extrusion molding machines have become one of the widely used machine types in the plastic processing industry. Plastic extruders can be matched with various plastic forming auxiliary machines such as pipes, films, rods, monofilaments, flat filaments, packing straps, wire meshes, plates, profiles, granulation, and cable sheathing to form various plastic extrusion molding production lines and produce various plastic products.

[0003] After retrieval, a patent with the Chinese patent publication number CN105235175A discloses an efficient screw extruder, which includes a driving device, a feeding device, a screw, a high-frequency electromagnetic heating device, a metering device, a head, and a barrel. The driving device includes a driving motor and a reducer connected to the driving motor and arranged above the driving motor. The feeding device includes a stirring barrel, a hot air dryer, and a feeding hopper. The discharge port of the stirring barrel is arranged at the feeding port of the feeding hopper. The hot air dryer is installed on the top of the stirring barrel. A stirring device is arranged in the stirring barrel. A cylinder is arranged on one side of the discharge port of the stirring barrel. A sliding distribution valve is arranged at the discharge port of the stirring barrel. One end of the sliding distribution valve is connected to the cylinder. A pressure sensor is arranged under the sliding distribution valve. A weighing hopper is installed in the feeding hopper. The weighing hopper is arranged directly below the discharge port of the stirring barrel. An electric heating coil is sleeved on the outer side surface of the weighing hopper. A temperature sensor is arranged on the weighing hopper. A material level sensor is arranged in the feeding hopper.

[0004] The above-mentioned efficient screw extruder in the above patent has the following deficiencies: The extruder in the above patent is inconvenient to control the feeding rate during feeding, resulting in the problem that the raw material is likely to block the feeding port during actual feeding, thus reducing the working efficiency of the screw extruder. Utility Model Content

[0005] In order to solve the problem that the existing extruder is prone to block the feeding port during feeding, this application provides a screw extruder.

[0006] The screw extruder provided by this application adopts the following technical solution:

[0007] A screw extruder includes an extruder housing and a feeding mechanism installed on the extruder housing. The feeding mechanism includes a feeding pipe installed at the feeding port of the extruder housing. The outer wall of the top of the feeding pipe is fixedly connected with a feeding hopper. The same driving roller is rotatably connected to the inner walls on both sides of the feeding pipe. A driving component for driving the driving roller to rotate is installed on the extruder housing.

[0008] By adopting the above structure, the setting of the feeding machine facilitates the control of the raw materials injected into the extruder, avoiding the blockage of the feeding port of the extruder caused by too fast feeding. The setting of the driving roller in the feeding pipe facilitates the transportation of the raw materials into the extruder, and the setting of the driving assembly facilitates the control of the rotation of the driving roller.

[0009] A plurality of arc grooves are equidistantly distributed on the outer wall of the driving roller, and a first pulley connected to the driving roller is rotatably connected to one outer wall of the feeding pipe.

[0010] By adopting the above structure, the arc grooves on the driving roller facilitate the temporary storage of the raw materials, and the rotation of the driving roller facilitates the transportation of the raw materials.

[0011] The same stirring rod is rotatably connected to the inner walls on both sides of the feeding hopper, and a second pulley is fixedly connected to one end of the stirring rod. The same belt is connected between the second pulley and the first pulley.

[0012] By adopting the above structure, the cooperation between the belt and the pulleys facilitates driving the stirring rod to rotate by the driving roller. When the stirring rod rotates, it facilitates the stirring of the raw materials in the feeding hopper, effectively avoiding the condensation of the raw materials in the feeding hopper.

[0013] The driving assembly includes a driving box fixedly connected to the outer shell of the extruder, and a gear is rotatably connected to one inner wall of the driving box. One end of the transmission shaft of the gear is fixedly connected to the driving roller.

[0014] By adopting the above structure, the gear in the driving box rotates synchronously with the driving roller, and thus it is convenient to limit the rotation of the driving roller by restricting the rotation of the gear.

[0015] Two symmetrically arranged sliding rods are fixedly connected to the inner walls on both sides of the driving box, and springs are sleeved on the outer walls of both sliding rods. The same limiting rack is slidably connected to the outer walls of the two sliding rods, and the limiting rack meshes with the gear.

[0016] By adopting the above structure, the setting of the driving box facilitates the installation of the two sliding rods. The setting of the springs facilitates directly pushing the limiting rack to mesh with the gear. The setting of the limiting rack facilitates restricting the rotation of the gear, thereby ensuring the stability of the driving roller.

[0017] An armature is fixedly connected to one outer wall of the limiting rack, and an electromagnet matching the armature is fixedly connected to one inner wall of the driving box. A reduction motor is fixedly connected to the outer shell of the extruder, and the output shaft of the reduction motor is fixedly connected to the gear.

[0018] By adopting the above structure, the electromagnet generates magnetism when energized, thereby attracting the armature to move towards the electromagnet, and then driving the limiting rack away from the gear. The setting of the reduction motor facilitates driving the rotation of the driving roller and the stirring rod.

[0019] The outer wall of the top of the feeding hopper is provided with a blanking port, and one end of the outer shell of the extruder is fixedly connected with a gearbox.

[0020] By adopting the above structure, it is convenient to transport the raw materials into the feeding hopper through the blanking port on the feeding hopper, and the setting of the gearbox facilitates driving the rotation of the screw in the extruder.

[0021] In summary, the present application includes at least one of the following beneficial technical effects:

[0022] 1. In the present application, by providing a feeding mechanism on the outer shell of the extruder, when the driving roller in the feeding pipe of the feeding mechanism rotates, the raw materials are transported into the extruder through the arc-shaped groove, thereby facilitating the control of the feeding rate of the extruder and solving the problem that the existing screw extruder is prone to blockage during feeding;

[0023] 2. In the present application, by providing a driving component and a reduction motor on the outer shell of the extruder, it is convenient to directly drive the rotation of the driving roller, and by controlling the rotation rate of the driving roller, it is further convenient to control the feeding rate of the extruder. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the overall structure of a screw extruder according to an embodiment of the present application;

[0025] Figure 2 It is a schematic diagram mainly showing the structure of the feeding mechanism according to an embodiment of the present application;

[0026] Figure 3 It is a schematic diagram mainly showing the structure of the feeding hopper according to an embodiment of the present application;

[0027] Figure 4 It is a schematic diagram mainly showing the structure of the feeding pipe according to an embodiment of the present application;

[0028] Figure 5 It is a schematic diagram of the cross-sectional structure of the driving component mainly shown in an embodiment of the present application;

[0029] Reference numerals: 1, outer shell of the extruder; 2, feeding mechanism; 3, gearbox; 4, feeding pipe; 5, feeding hopper; 6, belt; 7, blanking port; 8, reduction motor; 9, stirring rod; 10, driving component; 11, pulley one; 12, driving roller; 13, arc-shaped groove; 14, driving box; 15, gear; 16, limiting rack; 17, armature; 18, electromagnet; 19, sliding rod; 20, spring. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0030] The following will further describe the present application in detail with reference to the Figures 1 - 5 drawings.

[0031] An embodiment of the present application discloses a screw extruder.

[0032] Reference Figures 1 - 3 , a screw extruder, comprising an extruder housing 1 and a feeding mechanism 2 mounted on the extruder housing 1;

[0033] Reference Figures 2 - 3 , the feeding mechanism 2 for auxiliary raw material transportation includes a feeding pipe 4 mounted on the feeding port of the extruder housing 1. The outer wall of the top of the feeding pipe 4 is fixedly connected with a feeding hopper 5. A driving roller 12 is rotatably installed on the inner wall of the feeding pipe 4. A plurality of arc-shaped grooves 13 are arranged at equal distances on the outer wall of the driving roller 12. A driving assembly 10 for driving the driving roller 12 to rotate is installed on the extruder housing 1.

[0034] During use, the raw materials are injected into the feeding hopper 5, and then the raw materials are transported into the extruder through the feeding pipe 4 by the rotation of the driving roller 12. The rotation of the driving roller 12 facilitates controlling the feeding rate of the raw materials through the arc-shaped grooves 13.

[0035] Reference Figures 4 - 5 , the driving assembly 10 for auxiliary driving of the driving roller 12 includes a driving box 14 fixedly connected to the extruder housing 1. A gear 15 is rotatably connected to one side inner wall of the driving box 14. One end of the transmission shaft of the gear 15 is fixedly connected to the driving roller 12. Two symmetrically arranged sliding rods 19 are fixedly connected to the two side inner walls of the driving box 14. Springs 20 are sleeved on the outer walls of the two sliding rods 19. The same limiting rack 16 is slidably connected to the outer walls of the two sliding rods 19. The limiting rack 16 and the gear 15 are meshed with each other. An armature 17 is fixedly connected to one side outer wall of the limiting rack 16. An electromagnet 18 matched with the armature 17 is fixedly connected to one side inner wall of the driving box 14. A reduction motor 8 is fixedly connected to the extruder housing 1, and the output shaft of the reduction motor 8 is fixedly connected to the gear 15.

[0036] During use, the limiting rack 16 and the gear 15 are driven to be meshed by the spring 20 on the sliding rod 19, thereby ensuring the stability of the driving roller 12 and effectively avoiding the raw materials from leaking into the extruder due to the shaking of the driving roller 12. When the driving roller 12 rotates to transport the raw materials, the electromagnet 18 is energized to generate magnetism, so that the armature 17 drives the limiting rack 16 to move away from the gear 15, and at the same time, the spring 20 on the sliding rod 19 is compressed, which is convenient for the spring 20 to drive the limiting rack 16 and the gear 15 to be meshed when the electromagnet 18 is de-energized.

[0037] Reference Figure 2 , a pulley one 11 connected to the driving roller 12 is rotatably connected to the outer wall of the feeding pipe 4. The same stirring rod 9 is rotatably connected to the two side inner walls of the feeding hopper 5. A pulley two is fixedly connected to one end of the stirring rod 9. The same belt 6 is connected between the pulley two and the pulley one 11. A feeding port 7 is arranged on the outer wall of the top of the feeding hopper 5. A gear box 3 is fixedly connected to one end of the extruder housing 1.

[0038] During use, when the reduction motor 8 drives the driving roller 12 to rotate, it directly drives the stirring rod 9 to rotate through the belt 6. When the stirring rod 9 rotates, it is convenient to stir the raw materials in the feed hopper 5.

[0039] The implementation principle of a screw extruder according to an embodiment of the present application is as follows: During use, when the raw materials enter the feed hopper 5 through the feeding port 7, the reduction motor 8 starts. When the reduction motor 8 starts, the electromagnet 18 is simultaneously energized. When the electromagnet 18 is energized, it generates magnetism and directly attracts the armature 17 to move towards the electromagnet 18, thereby directly driving the limit rack 16 away from the gear 15. At this time, the reduction motor 8 directly drives the driving roller 12 to rotate, and the raw materials are conveyed to the extruder through the arc-shaped groove 13 on the driving roller 12. When the driving roller 12 rotates, it drives the stirring rod 9 to rotate through the belt 6. When the stirring rod 9 rotates, it directly stirs the raw materials in the feed hopper 5, thus avoiding the condensation of raw materials in the feed hopper 5. When the extruder stops, the electromagnet 18 in the drive box 14 is de-energized. When the electromagnet 18 is de-energized, the limit rack 16 meshes with the gear 15 under the push of the spring 20, thereby facilitating the restriction of the rotation of the gear 15, and further ensuring the stability of the driving roller 12, effectively preventing the raw materials in the feed hopper 5 from leaking into the extruder.

[0040] The above are all the preferred embodiments of the present application, and the protection scope of the present application is not limited thereby. Therefore, all equivalent changes made according to the structure, shape, and principle of the present application should be covered within the protection scope of the present application.

Claims

1. A screw extruder, comprising an extruder housing (1) and a feeding mechanism (2) mounted on the extruder housing (1), characterized in that: The feeding mechanism (2) comprises a feeding pipe (4) mounted on the feeding port of the extruder housing (1); a feeding hopper (5) is fixedly connected to the top outer wall of the feeding pipe (4); inner walls on both sides of the feeding pipe (4) are rotatably connected to the same driving roller (12); and a driving assembly (10) for driving the driving roller (12) to rotate is mounted on the extruder housing (1).

2. A screw extruder according to claim 1, characterized in that: The outer wall of the driving roller (12) is provided with a plurality of arc grooves (13) distributed at equal distances, and the outer wall of one side of the feeding pipe (4) is rotatably connected to a pulley (11) connected to the driving roller (12).

3. A screw extruder according to claim 2, characterized in that: The inner walls on both sides of the feed hopper (5) are rotatably connected to a same stirring rod (9), and one end of the stirring rod (9) is fixedly connected to a second pulley, and a same belt (6) is connected between the second pulley and the first pulley (11).

4. A screw extruder according to claim 3, characterized in that: The driving assembly (10) comprises a driving box (14) fixedly connected to the extruder housing (1), and a gear (15) is rotatably connected to an inner wall of one side of the driving box (14), and one end of the transmission shaft of the gear (15) is fixedly connected to the driving roller (12).

5. A screw extruder according to claim 4, characterized in that: Two symmetrically arranged sliding rods (19) are fixedly connected to the inner walls of both sides of the driving box (14), and the outer walls of the two sliding rods (19) are sleeved with springs (20). The outer walls of the two sliding rods (19) are slidably connected to the same limiting rack (16), and the limiting rack (16) and the gear (15) are meshed with each other.

6. A screw extruder according to claim 5, characterized in that: An armature (17) is fixedly connected to an outer wall of one side of the limit rack (16), an electromagnet (18) matching the armature (17) is fixedly connected to an inner wall of one side of the drive box (14), a reduction motor (8) is fixedly connected to the extruder housing (1), and an output shaft of the reduction motor (8) is fixedly connected to the gear (15).

7. A screw extruder according to claim 6, characterized in that: The top outer wall of the feed hopper (5) is provided with a feed outlet (7), and one end of the extruder housing (1) is fixedly connected to a gear box (3).

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