Double-screw plastic extruder

Abstract

The utility model discloses a double-screw plastic extruder, which relates to the technical field of plastic extruders and comprises a pedestal, a damping block arranged at the bottom of the pedestal and a plastic extruder main body arranged on the upper surface of the pedestal, and a stirring device is arranged on the upper surface of the plastic extruder main body. And a cooling device is arranged below one end of the plastic extruder main body. The servo motor is started to drive the first belt pulley on the surface of the output shaft of the servo motor to rotate, the second belt pulley is driven to rotate through transmission matching of the transmission belt, then the transmission rod is driven to rotate, the transmission rod drives the first bevel gear to rotate, and then the second bevel gear is matched to drive the second bevel gear to rotate. The stirring shaft drives the first gear disc to rotate, the first gear disc is matched with the second gear disc to drive the stirring rod and the stirring blades to stir raw materials poured into the stirring barrel through the feeding pipe, and therefore the utilization efficiency of the plastic extruder is improved.

Description

Technical Field

[0001] This utility model relates to the field of plastic extruder technology, specifically to a twin-screw plastic extruder. Background Technology

[0002] An extruder is a machine that uses the pressure of a rotating screw to extrude hot molten plastic to one side and shape it through a shaped extrusion orifice. Extruders can produce the desired shape of plastic products and are often used in the processing of plastic raw materials. Some extruders have two screws, which provide better extrusion speed and pressure. In injection molding machines, during extrusion, the rapidly rotating screw generates forward thrust.

[0003] In the existing technology, a twin-screw plastic extruder with publication number CN216443021U is proposed, which includes an extrusion box and a motor box. The motor box is equipped with a motor, and the extrusion box is symmetrically equipped with an extrusion mechanism. The motor box is equipped with a snap-fit ​​assembly on all four sides. The snap-fit ​​assembly includes a spring, a snap-fit ​​bar, a pressure plate, and snap-fit ​​teeth. The pressure plate is slidably installed inside the snap-fit ​​bar.

[0004] To address the issue that existing twin-screw plastic extruders cannot effectively mix multiple raw materials during actual use, current technology employs mixing as a processing method. However, this method is limited and the mixing effect is not ideal, leading to reduced efficiency of the plastic extruder. Utility Model Content

[0005] The purpose of this invention is to provide a twin-screw plastic extruder to solve the problems mentioned in the background art.

[0006] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows:

[0007] A twin-screw plastic extruder includes a platform.

[0008] Shock-absorbing blocks are installed at the bottom of the pedestal.

[0009] The plastic extruder body is mounted on the upper surface of the platform. A stirring device is mounted on the upper surface of the plastic extruder body. A cooling device is mounted below one end of the plastic extruder body. The stirring device includes a linkage mechanism mounted on the upper surface of the plastic extruder body. A stirring mechanism is mounted at one end of the linkage mechanism. The cooling device includes a pre-cooling mechanism mounted on one side of the platform. A gas conveying mechanism is mounted on the upper surface of the pre-cooling mechanism.

[0010] A further improvement of the present invention is that: a servo motor is provided at one end of the main body of the plastic extruder, the servo motor is fixedly installed on the upper surface of the platform, a pulley is fixedly installed on the output shaft surface of the servo motor, and a first gear is fixedly installed at one end of the output shaft of the servo motor, and a second gear and a third gear are meshed on the outer surface of the first gear.

[0011] By adopting the above technical solution, the screw is driven to perform extrusion work by setting up the cooperation between the servo motor, pulley one, first gear, second gear and third gear.

[0012] A further improvement of this utility model is that: a transmission belt is movably mounted on the surface of the first pulley, a second pulley is movably mounted on the inner surface of the transmission belt, a transmission rod is fixedly connected to the inner wall of the second pulley, a first bevel gear is fixedly mounted on one end of the transmission rod, a limit block is fixedly mounted on the top surface of the stirring device, and the inner wall of the limit block is movably connected to the outer surface of the transmission rod.

[0013] By adopting the above technical solution, the mixing device is driven to work through the cooperation between the transmission belt, pulley 2, transmission rod and first bevel gear.

[0014] A further improvement of the present invention is that the linkage mechanism includes a stirring cylinder fixedly installed on the upper surface of the plastic extruder body, a feed pipe fixedly connected to the top of the stirring cylinder, a second bevel gear meshing with the outer surface of the first bevel gear, a stirring shaft fixedly connected to the inner wall of the second bevel gear, and the surface of the stirring shaft being movably connected to the interior of the stirring cylinder.

[0015] By adopting the above technical solution, the feeding is facilitated by setting the fit between the mixing cylinder, the feed pipe, the second bevel gear and the mixing shaft.

[0016] A further improvement of the present invention is that the stirring mechanism includes a gear disk one fixedly installed on the surface of the stirring shaft, a gear disk two meshing with the outer surface of the gear disk one, a stirring rod fixedly connected to the inner wall of the gear disk two, a stirring blade fixedly connected to the surface of the stirring rod, and one end of the stirring rod rotatably connected to the top of the inner cavity of the stirring cylinder.

[0017] By adopting the above technical solution, the gear disk one, gear disk two and stirring blade are configured to cooperate in order to stir the raw materials.

[0018] A further improvement of the present invention is that the precooling mechanism includes a cooling box fixedly installed on one side of the base, a cooling chamber is provided inside the cooling box, a semiconductor condenser tube is provided below the cooling chamber, a semiconductor cooling chip is provided below the bottom of the semiconductor condenser tube, and both the semiconductor condenser tube and the semiconductor cooling chip are fixedly installed inside the cooling box.

[0019] By adopting the above technical solution, the cooling box, cooling chamber, semiconductor condenser tube and semiconductor refrigeration chip are coordinated to achieve real-time cooling.

[0020] A further improvement of the present invention is that the gas conveying mechanism includes a gas pump fixedly installed inside the cooling chamber, an air extraction pipe fixedly connected to the input end of the gas pump, and a gas conveying pipe fixedly connected to the output end of the gas pump. A discharge mold is fixedly installed at one end of the gas conveying pipe, and one end of the discharge mold extends into the interior of the plastic extruder body.

[0021] By adopting the above technical solution, the pre-cooling effect is achieved through the coordination between the air pump, the air extraction pipe and the discharge mold.

[0022] Due to the adoption of the above technical solution, the technological progress achieved by this utility model compared to the prior art is as follows:

[0023] 1. This utility model provides a twin-screw plastic extruder. By starting a servo motor, the first pulley on the surface of its output shaft rotates. Through the transmission belt, the second pulley rotates, which in turn rotates the transmission rod. The transmission rod then drives the first bevel gear to rotate. Then, through the engagement of the second bevel gear, the stirring shaft drives the first gear disk to rotate. The first gear disk engages with the second gear disk to drive the stirring rod and stirring blades to stir the raw material poured into the stirring cylinder through the feed pipe, thereby improving the utilization efficiency of the plastic extruder.

[0024] 2. This utility model provides a twin-screw plastic extruder that achieves cooling by using a combination of semiconductor condenser tubes and semiconductor cooling chips, and emits cold air from the surface. Then, through an air pump installed inside the cooling chamber and connected to an air extraction pipe, the cold air is drawn into the interior of the discharge die to achieve a pre-cooling effect, thereby improving the cooling effect of the cooled molded product and thus improving the efficiency of the plastic extruder.

[0025] 3. This utility model provides a twin-screw plastic extruder, which uses a mixing cylinder, feed pipe, second bevel gear, mixing shaft, gear disc one, gear disc two, and mixing blades to mix the raw material. Then, by using a cooling box, cooling chamber, semiconductor condenser, semiconductor cooling chip, air pump, exhaust pipe, and discharge die, a pre-cooling effect is achieved, which improves the cooling effect of the cooled molded product and thus improves the practicality of the plastic extruder. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the structure of this utility model;

[0027] Figure 2 This is a three-dimensional schematic diagram of the extrusion mechanism of this utility model;

[0028] Figure 3 This is an enlarged schematic diagram of section A of the structure of this utility model;

[0029] Figure 4 This is a three-dimensional cross-sectional view of the structural stirring device of this utility model;

[0030] Figure 5 This is a three-dimensional cross-sectional view of the structural cooling device of this utility model.

[0031] In the diagram: 1. Base; 2. Shock absorber; 3. Main body of plastic extruder; 31. Servo motor; 32. Belt pulley one; 33. First gear; 34. Second gear; 35. Third gear; 36. Transmission belt; 37. Belt pulley two; 38. Transmission rod; 39. First bevel gear; 4. Stirring device; 41. Stirring cylinder; 42. Feed pipe; 43. Second bevel gear; 44. Stirring shaft; 45. Gear disc one; 46. Gear disc two; 47. Stirring blade; 5. Cooling device; 51. Cooling box; 52. Cooling chamber; 53. Semiconductor condenser tube; 54. Semiconductor cooling chip; 55. Air pump; 56. Suction pipe; 57. Discharge mold. Detailed Implementation

[0032] The present invention will be further described in detail below with reference to embodiments: Example 1

[0033] like Figure 1-5As shown, this utility model provides a twin-screw plastic extruder, including a base 1, a shock-absorbing block 2 disposed at the bottom of the base 1, and a plastic extruder body 3 disposed on the upper surface of the base 1. A stirring device 4 is disposed on the upper surface of the plastic extruder body 3, and a cooling device 5 is disposed below one end of the plastic extruder body 3. The stirring device 4 includes a linkage mechanism disposed on the upper surface of the plastic extruder body 3, with a stirring mechanism disposed at one end of the linkage mechanism. The cooling device 5 includes a pre-cooling mechanism disposed on one side of the base 1, with a gas supply mechanism disposed on the upper surface of the pre-cooling mechanism. A servo motor 31 is disposed at one end of the plastic extruder body 3, and the servo motor 31 is fixedly mounted on the upper surface of the base 1. A pulley 32 is fixedly mounted on the output shaft surface of the servo motor 31, and a first gear 33 is fixedly mounted on one end of the output shaft of the servo motor 31. The outer surfaces of the first gear 33 mesh with... A transmission belt 36 is movably mounted on the surface of pulley 32, which is connected to a second gear 34 and a third gear 35. A second pulley 37 is movably mounted on the inner surface of the transmission belt 36. A transmission rod 38 is fixedly connected to the inner wall of the second pulley 37. A first bevel gear 39 is fixedly mounted on one end of the transmission rod 38. A limit block is fixedly mounted on the top surface of the mixing device 4. The inner wall of the limit block is movably connected to the outer surface of the transmission rod 38. By starting the servo motor 31, the pulley 32 on its output shaft surface is driven to rotate, which in turn drives the first gear 33 at one end to rotate. The second gear 34 and the third gear 35, which are connected to its outer surface, drive the screw to perform extrusion work. Then, through the transmission belt 36, the second pulley 37 is driven to rotate, which in turn drives the transmission rod 38 to rotate. The transmission rod 38 then drives the first bevel gear 39 to rotate. Example 2

[0034] like Figure 1-5As shown, based on Embodiment 1, this utility model provides a technical solution: Preferably, the linkage mechanism includes a stirring cylinder 41 fixedly installed on the upper surface of the plastic extruder body 3, a feed pipe 42 fixedly connected to the top of the stirring cylinder 41, a second bevel gear 43 meshing with the outer surface of the first bevel gear 39, a stirring shaft 44 fixedly connected to the inner wall of the second bevel gear 43, and the surface of the stirring shaft 44 movably connected to the interior of the stirring cylinder 41. The stirring mechanism includes a gear disk 45 fixedly installed on the surface of the stirring shaft 44, a gear disk 46 meshing with the outer surface of the gear disk 45, a stirring rod fixedly connected to the inner wall of the gear disk 46, and the surface of the stirring rod... A stirring blade 47 is fixedly connected to the surface, and one end of the stirring rod is rotatably connected to the top of the inner cavity of the stirring cylinder 41. By starting the servo motor 31, the pulley 32 on the surface of its output shaft is driven to rotate, and through the transmission belt 36, the pulley 37 is driven to rotate, which in turn drives the transmission rod 38 to rotate. The transmission rod 38 then drives the first bevel gear 39 to rotate, and then through the cooperation of the second bevel gear 43, the stirring shaft 44 drives the gear disk 45 to rotate. The gear disk 45 cooperates with the gear disk 46 to drive the stirring rod and the stirring blade 47 to stir the raw materials poured into the stirring cylinder 41 through the feed pipe 42. Example 3

[0035] like Figure 1-5 As shown, based on Embodiment 1, this utility model provides a technical solution: Preferably, the precooling mechanism includes a cooling box 51 fixedly installed on one side of the base 1. A cooling chamber 52 is provided inside the cooling box 51. A semiconductor condenser tube 53 is provided below the cooling chamber 52. A semiconductor cooling chip 54 is provided below the bottom of the semiconductor condenser tube 53. Both the semiconductor condenser tube 53 and the semiconductor cooling chip 54 are fixedly installed inside the cooling box 51. The gas supply mechanism includes an air pump 55 fixedly installed inside the cooling chamber 52. An air extraction pipe 56 is fixedly connected to the input end of the air pump 55, and an air supply pipe is fixedly connected to the output end of the air pump 55. A discharge mold 57 is fixedly installed at one end of the air supply pipe. One end of the discharge mold 57 extends into the interior of the plastic extruder body 3. By utilizing the cooperation of the semiconductor condenser tube 53 and the semiconductor cooling chip 54, the purpose of cooling can be achieved, and cold air is emitted from the surface. Then, the air pump 55, which is located inside the cooling chamber 52, cooperates with the air extraction pipe 56 to draw the cold air into the interior of the discharge mold 57 to achieve the precooling effect.

[0036] The working principle of this twin-screw plastic extruder will be explained in detail below.

[0037] like Figure 1-5As shown, firstly, by starting the servo motor 31, the pulley 32 on its output shaft surface is driven to rotate. Through the transmission belt 36, the pulley 37 is driven to rotate, which in turn drives the transmission rod 38 to rotate. The transmission rod 38 then drives the first bevel gear 39 to rotate. Then, through the cooperation of the second bevel gear 43, the stirring shaft 44 drives the gear disk 45 to rotate. The gear disk 45, in turn, drives the stirring rod and stirring blade 47 to stir the raw materials poured into the stirring cylinder 41 through the feed pipe 42. At the same time, through the cooperation of the semiconductor condenser tube 53 and the semiconductor cooling chip 54, when the direct current passes through the thermocouple formed by the two different semiconductor materials connected in series, the purpose of cooling can be achieved at both ends of the thermocouple, and cold air is emitted from the surface. Then, through the air pump 55 set in the cooling chamber 52, in conjunction with the air extraction pipe 56, the cold air is drawn into the interior of the discharge mold 57 to achieve a pre-cooling effect.

[0038] The present invention has been described in detail above. However, modifications or improvements can be made to it, which will be obvious to those skilled in the art. Therefore, any modifications or improvements that do not depart from the spirit of the present invention are within the protection scope of the present invention.

Claims

1. A double screw plastic extruder comprising a pedestal (1); a shock absorbing block (2) arranged at the bottom of the pedestal (1); and a plastic extruder body (3) arranged on the upper surface of the pedestal (1), characterized in that: The upper surface of the plastic extruder body (3) is provided with a stirring device (4), and the lower end of the plastic extruder body (3) is provided with a cooling device (5). The stirring device (4) comprises a linkage mechanism arranged on the upper surface of the plastic extruder body (3), one end of the linkage mechanism is provided with a stirring mechanism, and the cooling device (5) comprises a pre-cooling mechanism arranged on one side of the pedestal (1). The upper surface of the pre-cooling mechanism is provided with a gas conveying mechanism.

2. A twin screw plastic extruder according to claim 1, characterized in that: One end of the plastic extruder body (3) is provided with a servo motor (31), the servo motor (31) is fixedly installed on the upper surface of the pedestal (1), the output shaft surface of the servo motor (31) is fixedly installed with a belt pulley one (32), and one end of the output shaft of the servo motor (31) is fixedly installed with a first gear (33), the outer surface of the first gear (33) is engaged with a second gear (34) and a third gear (35).

3. A twin screw plastic extruder according to claim 2, characterised in that: The surface of the belt pulley one (32) is movably installed with a transmission belt (36), the inner surface of the transmission belt (36) is movably installed with a belt pulley two (37), the inner wall of the belt pulley two (37) is fixedly connected with a transmission rod (38), one end of the transmission rod (38) is fixedly installed with a first bevel gear (39), and the top surface of the stirring device (4) is fixedly installed with a limiting block, and the inner wall of the limiting block is movably connected with the outer surface of the transmission rod (38).

4. A twin screw plastic extruder as claimed in claim 3, characterized in that: The linkage mechanism comprises a stirring cylinder (41) fixedly installed on the upper surface of the plastic extruder body (3), the top of the stirring cylinder (41) is fixedly connected with a feeding pipe (42), the outer surface of the first bevel gear (39) is engaged with a second bevel gear (43), the inner wall of the second bevel gear (43) is fixedly connected with a stirring shaft (44), and the surface of the stirring shaft (44) is movably connected with the inside of the stirring cylinder (41).

5. A twin screw plastic extruder as claimed in claim 4, characterized in that: The stirring mechanism comprises a gear disc one (45) fixedly installed on the surface of the stirring shaft (44), the outer surface of the gear disc one (45) is engaged with a gear disc two (46), the inner wall of the gear disc two (46) is fixedly connected with a stirring rod, the surface of the stirring rod is fixedly connected with a stirring blade (47), and one end of the stirring rod is rotatably connected with the top of the inner cavity of the stirring cylinder (41).

6. A twin screw plastic extruder as claimed in claim 1, wherein: The pre-cooling mechanism comprises a cooling box (51) fixedly installed on one side of the pedestal (1), the inside of the cooling box (51) is provided with a cooling chamber (52), the lower end of the cooling chamber (52) is provided with a semiconductor condenser pipe (53), the bottom of the semiconductor condenser pipe (53) is provided with a semiconductor refrigeration piece (54), and the semiconductor condenser pipe (53) and the semiconductor refrigeration piece (54) are fixedly installed in the inside of the cooling box (51).

7. A twin screw plastic extruder as claimed in claim 6, characterized in that: The gas conveying mechanism comprises a gas pump (55) fixedly installed inside the cooling chamber (52), an air suction pipe (56) fixedly connected to an input end of the gas pump (55), and a gas conveying pipe fixedly connected to an output end of the gas pump (55), one end of the gas conveying pipe being fixedly installed with a discharging die (57) extending to the inside of the plastic extruder main body (3).

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