Biodegradable modified particle double-screw extruder

Abstract

The utility model relates to the technical field of twin-screw extruders, in particular to a biodegradable modified particle twin-screw extruder which comprises a base, a supporting shell, a cutting column, a rotating mechanism, a cooling mechanism and a discharging mechanism, an extruder body is fixedly arranged on the base, an extrusion head is installed on the extruder body, the supporting shell is arranged on one side of the base, and the cutting column is arranged on the other side of the supporting shell. The extrusion head penetrates through the side wall of the supporting shell and extends into the supporting shell, the cutting column is rotationally arranged on the side wall of the supporting shell, a plurality of cutting teeth are fixedly arranged on the side wall of the cutting column, the rotating mechanism is arranged on the supporting shell and used for controlling the cutting column to rotate, and the cooling mechanism is arranged on the supporting shell and used for cooling plastic strips extruded by the extrusion head. By means of the technical scheme, the problem that in the related technology, after materials are extruded by a double-screw extruder, the cooling cost of the materials is high is solved.

Description

Technical Field

[0001] This utility model relates to the technical field of twin-screw extruders, specifically to a biodegradable modified granule twin-screw extruder. Background Technology

[0002] Biodegradable pellets are plastic products that can be decomposed by microorganisms in the natural environment. Commonly used raw materials include biomass such as starch and polylactic acid.

[0003] In the production process of biodegradable modified granules, a mixture of bio-based materials and plasticizers is added to a twin-screw extruder. The twin-screw extruder can extrude the raw materials and form plastic strips, which are then cut into biodegradable modified granules by a cutting mechanism.

[0004] However, the plastic strips themselves are at a high temperature during the extrusion process, and they are prone to deformation during the cutting process, which affects the molding effect of biodegradable particles.

[0005] In the production process of existing extruder production lines, long cooling conveyor lines are mostly equipped to cool the extruded strands. These lines occupy a large space, are inconvenient to operate, and have high cooling costs. Utility Model Content

[0006] This invention proposes a biodegradable modified granule twin-screw extruder, which solves the problem of high cooling costs after the material is extruded in related technologies.

[0007] The technical solution of this utility model is as follows: a biodegradable modified granular twin-screw extruder, comprising a base, a support shell, a cutting column, a rotating mechanism, a cooling mechanism, and a discharge mechanism;

[0008] An extruder body is fixedly mounted on the base, and an extrusion head is installed on the extruder body. A support housing is located on one side of the base. The extrusion head extends into the support housing through the side wall of the support housing. A cutting column is rotatably mounted on the side wall of the support housing, and multiple cutting teeth are fixedly mounted on the side wall of the cutting column. A rotating mechanism is located on the support housing to control the rotation of the cutting column. A cooling mechanism is located on the support housing to cool the plastic strip extruded by the extrusion head. A discharge mechanism is located inside the support housing to discharge the biodegradable modified particles from the support housing.

[0009] Preferably, the rotating mechanism includes:

[0010] A first toothed ring is fixedly mounted on the cutting column;

[0011] The first gear is rotatably mounted on the side wall of the support housing and meshes with the first gear ring.

[0012] The first motor is fixedly mounted on the support housing, and its output end is fixedly connected to the first gear.

[0013] Furthermore, the cooling mechanism includes:

[0014] A support tube is rotatably mounted on the side wall of the support housing, and a cooling housing is connected to the support tube.

[0015] The cooling pipe has multiple cooling pipes connected to the cooling housing. The end of the cooling pipe away from the cooling housing is sealed, and multiple cooling nozzles are connected to the side wall of the cooling pipe.

[0016] A first driving mechanism is disposed on the support housing and is used to control the rotation of the support tube;

[0017] The second drive mechanism is disposed inside the support housing and is used to control the rotation of the cooling pipe;

[0018] A water supply mechanism is provided on the support housing and is used to supply water to the cooling housing.

[0019] Furthermore, the water supply mechanism includes:

[0020] A water tank is provided on the inner bottom wall of the supporting shell, and the water tank is filled with coolant;

[0021] A water pump is fixedly mounted on the support housing. The water pump input end extends into the water tank, and the water pump output end extends through the support housing into the support pipe.

[0022] Furthermore, the first drive mechanism includes:

[0023] The second toothed ring is fixedly mounted on the support tube, and the first toothed ring is fixedly mounted on the support tube.

[0024] The second gear is rotatably mounted on the inner wall of the support housing and meshes with the second gear ring.

[0025] The second motor is fixedly mounted on the support housing, and its output end is fixedly connected to the second gear.

[0026] Based on the above scheme, the second drive mechanism includes:

[0027] An annular groove is formed on the cooling housing, and the cooling pipe passes through the annular groove;

[0028] The third gear, a plurality of the third gears are rotatably arranged in the annular groove, wherein the cooling pipe passes through the third gear and is fixedly connected to the third gear;

[0029] A drive ring is fixedly mounted on the support housing, and a third toothed ring is fixedly mounted on the inner wall of the drive ring, which meshes with the third gear.

[0030] Based on the above solution, the discharge mechanism includes:

[0031] The discharge pipe is fixed and extends through the side wall of the support housing. The end of the discharge pipe near the base is sealed, and the inner top wall of the discharge pipe has a discharge port.

[0032] A sieve plate, which is fixedly disposed between the side wall of the discharge port and the side wall of the support housing;

[0033] A screw rod, which is rotatably disposed inside the discharge pipe;

[0034] The third motor is fixedly installed inside the discharge pipe, and its output end is fixedly connected to the screw rod.

[0035] Based on the above scheme, the side wall of the discharge pipe is provided with multiple screen holes.

[0036] Based on the above scheme, a filter screen is installed at the water pump input end.

[0037] Based on the above scheme, the side wall of the water tank is provided with a water inlet and a drain outlet, and the drain outlet has a built-in drain control valve.

[0038] The working principle and beneficial effects of this utility model are as follows:

[0039] 1. In this utility model, by setting up a rotating mechanism, during the process of extruding plastic strips from the extruder head, the first gear can be rotated by the operation of the first motor, and then the cutting column can be rotated by the meshing of the first gear and the first toothed ring, thereby driving the cutting teeth to cut the plastic strip into pellets;

[0040] 2. In this utility model, the cooling mechanism facilitates the pumping of coolant from the water tank into the support pipe via a water pump. Then, coolant can be sprayed onto the plastic strip through the cooling nozzles on the cooling pipe. Simultaneously, the operation of the second motor controls the movement of the cooling pipe around the support pipe, causing the cooling pipe to rotate, thereby facilitating the spraying of coolant onto the surface of the plastic strip. This facilitates the cooling of the plastic strip and prevents deformation of the plastic strip during the cutting process.

[0041] 3. In this utility model, through the setting of the discharge mechanism, the cut biodegradable modified particles can fall onto the screen plate, and then enter the discharge pipe through the discharge port under the action of gravity. Then, the operation of the third motor drives the screw rod to rotate, so that the biodegradable modified particles can be discharged through the discharge pipe by the rotation of the screw rod. During the discharge process of biodegradable modified particles, the biodegradable modified particles and the coolant can be separated by the screen plate and screen holes, which facilitates the discharge of biodegradable modified particles.

[0042] 4. In the prior art, the plastic strip is completely hardened after cooling, which places high demands on the pelletizer and the cutter. In this application, the plastic strip is forcibly cooled by the liquid sprayed from the cooling pipe as soon as it is extruded from the die head, and is cut by the cutter at the same time. At this time, the plastic strip is not completely cooled, which makes it easier for the cutter to cut it. This further reduces the pelletizing cost. If it is not cooled, the cutter is not easy to cut directly during the pelletizing process because the plastic strip is still in a semi-molten state and is not easy to cut.

[0043] 5. In this utility model, the base, supporting shell, cutting column, rotating mechanism, cooling mechanism and discharge mechanism are set up to facilitate the cooling of the plastic strip extruded by the extruder head through the cooling mechanism, thereby improving the cutting effect of the cutting teeth on the plastic strip. During the cooling process, only the operation of the first motor, water pump, second motor and third motor is needed to achieve the cooling, pelletizing and pelletizing effect of the plastic strip. The working cost is low, which solves the problem of high cooling cost of the extruded material in the twin-screw extruder in related technologies. Attached Figure Description

[0044] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0045] Figure 1 This is a schematic diagram of the structure of this utility model;

[0046] Figure 2 This is a cross-sectional structural diagram of the present invention;

[0047] Figure 3 This is a cross-sectional view of the supporting shell of this utility model;

[0048] Figure 4 This is a schematic diagram of the material discharge mechanism of this utility model.

[0049] In the diagram: 1. Base; 2. Extruder body; 3. Extrusion head; 4. Support housing; 5. Cutting column; 6. Cutting teeth; 7. First gear ring; 8. First gear; 9. First motor; 10. Support tube; 11. Cooling housing; 12. Cooling tube; 13. Water pump; 14. Second gear ring; 15. Second gear; 16. Second motor; 17. Third gear; 18. Drive ring; 19. Discharge pipe; 20. Screen plate; 21. Screw rod; 22. Screen holes. Detailed Implementation

[0050] The technical solutions of this utility model will be clearly and completely described below with reference to the embodiments of this utility model. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this utility model.

[0051] like Figures 1-4 As shown in the figure, this embodiment proposes a biodegradable modified granule twin-screw extruder, including a base 1, a support housing 4, a cutting column 5, a rotating mechanism, a cooling mechanism, and a discharge mechanism. The extruder body 2 is fixedly mounted on the base 1, and an extrusion head 3 is installed on the extruder body 2. The support housing 4 is located on one side of the base 1, and the extrusion head 3 extends into the support housing 4 through the side wall of the support housing 4. The cutting column 5 is rotatably mounted on the side wall of the support housing 4, and multiple cutting teeth 6 are fixedly mounted on the side wall of the cutting column 5. The rotating mechanism is located on the support housing 4 to control the rotation of the cutting column 5. The cooling mechanism is located on the support housing 4 to cool the plastic strip extruded by the extrusion head 3. The discharge mechanism is located inside the support housing 4 to discharge the biodegradable modified granules from the support housing 4.

[0052] Reference Figure 2 and Figure 3 The rotating mechanism includes a first gear ring 7, a first gear 8, and a first motor 9. The first gear ring 7 is fixedly mounted on the cutting column 5. The first gear 8 is rotatably mounted on the side wall of the support housing 4 and meshes with the first gear ring 7. The first motor 9 is fixedly mounted on the support housing 4 and its output end is fixedly connected to the first gear 8. The operation of the first motor 9 can drive the support column to rotate, thereby cutting biodegradable modified particles through the cutting teeth 6.

[0053] Reference Figures 1-3The cooling mechanism includes a support pipe 10, cooling pipes 12, a first drive mechanism, a second drive mechanism, and a water supply mechanism. The support pipe 10 is rotatably mounted on the side wall of the support housing 4. A cooling housing 11 is connected to the support pipe 10, and multiple cooling pipes 12 are connected to the cooling housing 11. The end of each cooling pipe 12 away from the cooling housing 11 is sealed, and multiple cooling nozzles are connected to the side wall of the cooling pipe 12. The first drive mechanism is mounted on the support housing 4 and is used to control the rotation of the support pipe 10. The second drive mechanism is located inside the support housing 4 and is used to control the rotation of the cooling pipes 12. A water supply mechanism is installed on the support housing 4 and is used to supply water to the cooling housing 11. The water supply mechanism includes a water tank and a water pump 13. A water tank is opened on the inner bottom wall of the support housing 4 and filled with coolant. The water pump 13 is fixedly installed on the support housing 4. The input end of the water pump 13 extends into the water tank, and the output end of the water pump 13 passes through the support housing 4 and extends into the support pipe 10. The first drive mechanism includes a second gear ring 7, a second gear 15, and a second motor 16. The first gear ring 7 is fixedly installed on the support pipe 10, and the second gear 15 is rotatably installed on the inner wall of the support housing 4. The second gear 15 meshes with the second gear ring 14. The second motor 16 is fixedly mounted on the support housing 4. The output end of the second motor 16 is fixedly connected to the second gear 15. The second drive mechanism includes an annular groove, a third gear 17, and a drive ring 18. The annular groove is formed on the cooling housing 11. The cooling pipe 12 passes through the annular groove. Multiple third gears 17 are rotatably arranged in the annular groove. The cooling pipe 12 passes through the third gear 17 and is fixedly connected to the third gear 17. The drive ring 18 is fixedly mounted on the support housing 4. A third gear ring is fixedly mounted on the inner wall of the drive ring 18. The third gear ring meshes with the third gear 15. The system features 7-phase meshing. A filter screen is installed at the input end of the water pump 13. The side wall of the water tank has an inlet and a outlet. The outlet has a built-in drain control valve. The water pump 13 pumps the coolant in the water tank into the support pipe 10. Then, the coolant can be sprayed onto the plastic strip through the cooling nozzle on the cooling pipe 12. At the same time, the operation of the second motor 16 can control the movement of the cooling pipe 12 around the support pipe 10, thereby making the cooling pipe 12 rotate. This facilitates the spraying of coolant onto the surface of the plastic strip, thus cooling the plastic strip and preventing deformation during the cutting process.

[0054] Reference Figure 3 and Figure 4The discharge mechanism includes a discharge pipe 19, a sieve plate 20, a screw rod 21, and a third motor. The discharge pipe 19 is fixedly and penetrates the side wall of the support housing 4. The end of the discharge pipe 19 near the base 1 is sealed. The inner top wall of the discharge pipe 19 has a discharge port. The sieve plate 20 is fixedly installed between the side wall of the discharge port and the side wall of the support housing 4. The screw rod 21 is rotatably installed inside the discharge pipe 19. The third motor is fixedly installed inside the discharge pipe 19. The output end of the third motor is fixedly connected to the screw rod 21. The side wall of the discharge pipe 19 has multiple sieve holes 22. During the discharge of biodegradable modified particles through the discharge pipe 19, the biodegradable modified particles and the coolant can be separated through the sieve plate 20 and the sieve holes 22, thereby facilitating the discharge of the biodegradable modified particles.

[0055] In this embodiment, during use, the operator adds a mixture of bio-based materials and plasticizers to the extruder body 2, allowing plastic strips to be extruded through the extruder head 3. During this process, the operator controls the water pump 13 and the second motor 16. The water pump 13 pumps coolant from the water tank into the support tube 10. Coolant is then sprayed onto the plastic strip through the cooling nozzles on the cooling tube 12. Simultaneously, the second motor 16 rotates the second gear 15, which in turn rotates the support tube 10 through meshing with the second gear ring 14. This causes the cooling tube 12 to move around the support tube 10. During this movement, the third gear ring meshes with the third gear 17, further rotating the cooling tube 12 and spraying coolant onto the surface of the plastic strip. The cooling liquid is used to cool the plastic strip. Simultaneously, the operator controls the first motor 9 to operate, which in turn controls the rotation of the first gear 8. The meshing of the first gear 8 with the first gear ring 7 drives the cutting column 5 to rotate, thereby driving the cutting teeth 6 to granulate the plastic strip. The granules are then dropped onto the sieve plate 20 and, under gravity, enter the discharge pipe 19 through the discharge port. The third motor then drives the screw rod 21 to rotate, which in turn drives the biodegradable granules to be discharged through the discharge pipe 19. During the discharge process, the biodegradable granules are separated from the cooling liquid by the sieve plate 20 and the sieve holes 22, thus achieving the discharge of the biodegradable granules.

[0056] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A biodegradable modified granular twin-screw extruder, characterized in that, include: A base (1) is fixedly provided on the base (1), and an extruder body (2) is installed on the extruder body (2). A support housing (4) is disposed on one side of the base (1), and the extrusion head (3) extends through the side wall of the support housing (4) and into the support housing (4); Cutting column (5), the cutting column (5) is rotatably mounted on the side wall of the support housing (4), and the side wall of the cutting column (5) is fixedly provided with multiple cutting teeth (6). A rotating mechanism is provided on the support housing (4) and is used to control the cutting column (5) to rotate; A cooling mechanism is provided on the support housing (4) for cooling the plastic strip extruded by the extrusion head (3); The discharge mechanism is disposed inside the support shell (4) and is used to discharge the biodegradable modified particles from the support shell (4).

2. The biodegradable modified granular twin-screw extruder according to claim 1, characterized in that, The rotating mechanism includes: The first toothed ring (7) is fixedly mounted on the cutting column (5); The first gear (8) is rotatably mounted on the side wall of the support housing (4), and the first gear (8) meshes with the first gear ring (7); The first motor (9) is fixedly mounted on the support housing (4), and the output end of the first motor (9) is fixedly connected to the first gear (8).

3. The biodegradable modified granular twin-screw extruder according to claim 2, characterized in that, The cooling mechanism includes: A support tube (10) is rotatably mounted on the side wall of the support housing (4), and a cooling housing (11) is connected to the support tube (10). A cooling pipe (12) is provided on the cooling housing (11), and a plurality of cooling pipes (12) are connected to it. The end of the cooling pipe (12) away from the cooling housing (11) is sealed, and a plurality of cooling nozzles are connected to the side wall of the cooling pipe (12). A first driving mechanism is disposed on the support housing (4) and is used to control the rotation of the support tube (10); The second drive mechanism is disposed inside the support housing (4) and is used to control the cooling pipe (12) to rotate; A water supply mechanism is provided on the support housing (4) for supplying water to the cooling housing (11).

4. The biodegradable modified granular twin-screw extruder according to claim 3, characterized in that, The water supply system includes: The water tank is provided on the inner bottom wall of the supporting shell (4), and the water tank is filled with coolant. A water pump (13) is fixedly mounted on the support housing (4). The input end of the water pump (13) extends into the water tank, and the output end of the water pump (13) extends through the support housing (4) into the support pipe (10).

5. A biodegradable modified granular twin-screw extruder according to claim 4, characterized in that, The first driving mechanism includes: The second toothed ring (14) is fixedly mounted on the support tube (10); The second gear (15) is rotatably mounted on the inner wall of the support housing (4), and the second gear (15) meshes with the second gear ring (14); The second motor (16) is fixedly mounted on the support housing (4), and the output end of the second motor (16) is fixedly connected to the second gear (15).

6. A biodegradable modified granular twin-screw extruder according to claim 5, characterized in that, The second drive mechanism includes: An annular groove is formed on the cooling housing (11), and the cooling pipe (12) passes through the annular groove; The third gear (17) is rotatably arranged in the annular groove, wherein the cooling pipe (12) passes through the third gear (17) and is fixedly connected to the third gear (17); A drive ring (18) is fixedly mounted on the support housing (4). A third toothed ring is fixedly mounted on the inner wall of the drive ring (18), and the third toothed ring meshes with the third gear (17).

7. A biodegradable modified granular twin-screw extruder according to claim 6, characterized in that, The discharge mechanism includes: The discharge pipe (19) is fixed and passes through the side wall of the support housing (4). The end of the discharge pipe (19) near the base (1) is sealed. The inner top wall of the discharge pipe (19) is provided with a discharge port. The sieve plate (20) is fixedly disposed between the side wall of the discharge port and the side wall of the support housing (4); A screw rod (21) is rotatably disposed inside the discharge pipe (19); The third motor is fixedly installed inside the discharge pipe (19), and the output end of the third motor is fixedly connected to the screw rod (21).

8. A biodegradable modified granular twin-screw extruder according to claim 7, characterized in that, The discharge pipe (19) has multiple sieve holes (22) on its side wall.

9. A biodegradable modified granular twin-screw extruder according to claim 8, characterized in that, A filter screen is provided at the input end of the water pump (13).

10. A biodegradable modified granular twin-screw extruder according to claim 9, characterized in that, The side wall of the water tank is provided with a water inlet and a drain outlet, and the drain outlet has a built-in drain control valve.

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