Double-screw extruder

Abstract

The utility model relates to the technical field of extruders, and discloses a double-screw extruder, which comprises an extrusion pipeline, two screw mechanisms and a screw rod mechanism, the feeding hole is formed in the top of the extrusion pipeline; the material pipe is arranged in the feeding hole, and the diameter of the material pipe is gradually reduced from the top to the bottom; when the rotating part rotates the rotating shaft to enable the material stirring plate to rotate, the material stirring plate can move up and down in the material pipe, the disturbance effect on raw materials can be further improved, and the raw materials can be effectively prevented from being accumulated in the material pipe. The problem that residual materials are left in the hopper due to the fact that the materials are prone to blocking at the feeding port is solved.

Description

Technical Field

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

[0002] Most plastic polymers have the advantages of light weight, stable chemical properties, no rust, good impact resistance, good transparency and wear resistance, etc. Therefore, the polymer processing industry has developed rapidly, and the twin-screw extruder, as one of the main polymer processing equipment, has been rapidly developed and widely used for its excellent processing performance; the screw extruder relies on the pressure and shear force generated by the rotation of the screw to fully plasticize and evenly mix the material and form it through the die; plastic extruders can be basically classified into twin-screw extruders, single-screw extruders, and the rare multi-screw extruders and screwless extruders.

[0003] When using the extruder in the prior art, the material is added into the hopper, and then the material enters the barrel from the hopper. However, in actual use, when adding materials, multiple materials are usually added at the same time. When the material enters the barrel from the feed port, the material is easily blocked at the feed port, resulting in residual material in the hopper, wasting material, which needs to be improved. Utility Model Content

[0004] In view of the deficiencies in the prior art, the utility model provides a twin-screw extruder, aiming to alleviate the above problems at least to a certain extent.

[0005] The above technical objectives of the utility model are achieved through the following technical solutions:

[0006] A twin-screw extruder, comprising:

[0007] An extrusion pipeline, wherein two screw mechanisms are arranged in the extrusion pipeline;

[0008] A feed inlet is provided at the top of the extrusion pipe;

[0009] A material pipe is arranged in the feed port, and the diameter of the material pipe gradually decreases from the top to the bottom;

[0010] A rotating shaft is arranged in the material tube, and an inner side wall of the material tube is provided with a material shifting plate corresponding to the rotating shaft;

[0011] A driving component is provided between the extrusion pipe and the screw mechanism, and is used to synchronously rotate the two screw mechanisms so that the two screw mechanisms rotate in opposite directions;

[0012] A rotating component is provided between the extrusion pipe and the rotating shaft, and is used for cyclically rotating the rotating shaft so that the material-diverting plate rotates with the follower;

[0013] Wherein, the material shifting plate can reciprocate up and down when rotating along the inner wall of the material tube.

[0014] Preferably, a plurality of material-moving rods are connected between the rotating shaft and the material-moving plate.

[0015] Preferably, the rotating component includes a tube body arranged in the material pipe, the bottom of the rotating shaft extends into the tube body and is connected to a first bevel gear, and a transmission shaft is provided at the top of the extrusion pipe, one end of the transmission shaft extends into the tube body and is connected to a second bevel gear connected to the first bevel gear.

[0016] Preferably, a corrugated ring is provided at the top of the material tube, the top of the material stripper plate extends to the top of the corrugated ring, a connecting shaft is rotatably connected in the tube body, the rotating shaft is slidably connected to the rotating shaft, and a spring is connected between the connecting shaft and the rotating shaft.

[0017] Preferably, the rotating component further comprises a first motor connected to the extrusion pipe, and a driving shaft of the first motor is connected to the transmission shaft.

[0018] Preferably, the driving component includes a second motor connected to one side of the extrusion pipe, a chain transmission mechanism is provided between the driving shaft of the second motor and the shaft of one of the screw mechanisms, and the shafts of the two screw mechanisms are respectively connected to first gears that mesh with each other.

[0019] In summary, the utility model mainly has the following beneficial effects:

[0020] By setting a material pipe, when using it, the operator can put the plastic raw material into the material pipe. The top diameter of the material pipe is large, which can facilitate the operator to put the raw material into the material pipe and reduce the probability of raw material spilling. When the granular raw material is put into the material pipe, the rotating part can be used to rotate the rotating shaft. The rotation of the rotating shaft can make the material stripping plate rotate along the inner wall of the material pipe, so that the raw material adhering to the inner wall of the material pipe can be scraped off. At the same time, the material stripping plate can also disturb the raw material in the material pipe when it rotates, avoiding the problem that the raw material cannot fall into the extrusion pipe due to the support effect formed by the interaction between particles. When the rotating part rotates the rotating shaft to rotate the material stripping plate, the material stripping plate can move up and down in the material pipe, which can further improve the disturbance effect on the raw material and effectively avoid the accumulation of raw materials in the material pipe. Compared with the screw extruder in the prior art, the present application solves the problem that when the material enters the barrel from the feed inlet, the material is easily blocked at the feed inlet, resulting in residual material in the hopper. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0022] Figure 2It is a schematic diagram of the feed port structure of the utility model;

[0023] Figure 3 This is a schematic diagram of the corrugated ring structure of the utility model;

[0024] Figure 4 It is a schematic diagram of the pipe body structure of the utility model.

[0025] Reference numerals:

[0026] 100, extrusion pipe; 101, screw mechanism; 102, feed port; 103, feed pipe; 104, rotating shaft; 105, feed plate; 106, feed rod;

[0027] 200, tube body; 201, first bevel gear; 202, transmission shaft; 203, second bevel gear;

[0028] 300, corrugated ring; 301, connecting shaft; 302, spring; 303, first motor; 304, second motor; 305, chain transmission mechanism; 306, first gear. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0030] refer to Figure 1-Figure 4 , a twin-screw extruder, comprising:

[0031] An extrusion pipe 100, wherein two screw mechanisms 101 are arranged in the extrusion pipe 100;

[0032] A feed port 102 is provided at the top of the extrusion pipe 100;

[0033] The material pipe 103 is disposed in the feed port 102, and the diameter of the material pipe 103 gradually decreases from the top to the bottom;

[0034] A rotating shaft 104 is disposed in the material tube 103, and an inner wall of the material tube 103 is provided with a material shifting plate 105 corresponding to the rotating shaft 104;

[0035] A driving component is disposed between the extrusion pipe 100 and the screw mechanism 101, and is used to synchronously rotate the two screw mechanisms 101, so that the two screw mechanisms 101 rotate in opposite directions;

[0036] The rotating component is disposed between the extrusion pipe 100 and the rotating shaft 104, and is used to cyclically rotate the rotating shaft 104, and the material-diverting plate 105 rotates with the device;

[0037] The material-diverting plate 105 can reciprocate up and down when rotating along the inner wall of the material tube 103;

[0038] By setting the material tube 103, when in use, the operator can put the plastic raw material into the material tube 103. The top diameter of the material tube 103 is relatively large, which can facilitate the operator to put the raw material into the material tube 103 and reduce the probability of the raw material spilling. When the granular raw material is put into the material tube 103, the rotating shaft 104 can be rotated by the rotating component. The rotation of the rotating shaft 104 can make the material stripping plate 105 rotate along the inner wall of the material tube 103, so that the raw material adhered to the inner wall of the material tube 103 can be scraped off. At the same time, the material stripping plate 105 can also disturb the raw material in the material tube 103 when rotating. The problem that the raw material cannot fall into the extrusion pipe 100 due to the support effect formed by the interaction between particles is avoided. When the rotating component rotates the rotating shaft 104 to allow the material stripper plate 105 to rotate, the material stripper plate 105 can move up and down in the material pipe 103, which can further improve the disturbance effect on the raw material and effectively avoid the raw material from accumulating in the material pipe 103. Compared with the screw extruder in the prior art, the present application solves the problem that when the material enters the barrel from the feed port 102, the material is easily blocked at the feed port 102, resulting in residual material in the hopper.

[0039] As a further feature of the present invention, a plurality of material-moving rods 106 are connected between the rotating shaft 104 and the material-moving plate 105;

[0040] By setting up the material tapping rod 106, the material tapping plate 105 can be rotated by the material tapping rod 106 when the rotating shaft 104 rotates, so as to achieve the purpose of rotating the material tapping plate 105 when the rotating shaft 104 rotates. At the same time, the setting of the material tapping rod 106 can also move the raw materials in the material tube 103 when it rotates, thereby improving the effect of dispersing and tapping materials to prevent accumulation.

[0041] As a further feature of the present invention, the rotating component includes a tube body 200 disposed in the material tube 103, the bottom of the rotating shaft 104 extends into the tube body 200 and is connected to a first bevel gear 201, and a transmission shaft 202 is provided at the top of the extrusion pipe 100, one end of the transmission shaft 202 extends into the tube body 200 and is connected to a second bevel gear 203 connected to the first bevel gear 201;

[0042] By providing the transmission shaft 202 , an operator can rotate the transmission shaft 202 during application. The rotation of the transmission shaft 202 can rotate the rotating shaft 104 through the second bevel gear 203 and the first bevel gear 201 , thereby achieving the purpose of rotating the rotating shaft 104 .

[0043] As a further feature of the present invention, a corrugated ring 300 is provided at the top of the material tube 103, the top of the material stripper plate 105 extends to the top of the corrugated ring 300, a connecting shaft 301 is rotatably connected in the tube body 200, the rotating shaft 104 is slidably connected to the rotating shaft 104, and a spring 302 is connected between the connecting shaft 301 and the rotating shaft 104;

[0044] By setting up a bellows, when it is used, due to the shape of the top of the bellows, when the material shifting plate 105 rotates, it is restricted by it and the force of the spring 302, so that the material shifting plate 105, the material shifting rod 106 and the rotating shaft 104 can move up and down, which can achieve the purpose of improving the dispersion of raw materials and shifting the raw materials to prevent accumulation.

[0045] As a further feature of the present invention, the rotating component further includes a first motor 303 connected to the extrusion pipe 100 , and a driving shaft of the first motor 303 is connected to the transmission shaft 202 ;

[0046] By providing the first motor 303 , the driving shaft of the first motor 303 rotates to achieve the purpose of rotating the transmission shaft 202 .

[0047] As a further feature of the present invention, the driving component includes a second motor 304 connected to one side of the extrusion pipe 100, a chain transmission mechanism 305 is provided between the driving shaft of the second motor 304 and the shaft of one of the screw mechanisms 101, and the shafts of the two screw mechanisms 101 are respectively connected to first gears 306 that mesh with each other;

[0048] By providing the second motor 304 , the rotation of the drive shaft of the second motor 304 can rotate one of the screw mechanisms 101 through the chain transmission mechanism 305 , and the two first gears 306 meshing with each other can achieve the purpose of making the two screw mechanisms 101 rotate synchronously and in opposite directions.

[0049] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A twin-screw extruder, characterized in that: include: An extrusion pipeline, wherein two screw mechanisms are arranged in the extrusion pipeline; A feed inlet is provided at the top of the extrusion pipe; A material pipe is arranged in the feed port, and the diameter of the material pipe gradually decreases from the top to the bottom; A rotating shaft is arranged in the material tube, and an inner side wall of the material tube is provided with a material shifting plate corresponding to the rotating shaft; A driving component is provided between the extrusion pipe and the screw mechanism, and is used to synchronously rotate the two screw mechanisms so that the two screw mechanisms rotate in opposite directions; A rotating component is provided between the extrusion pipe and the rotating shaft, and is used for cyclically rotating the rotating shaft so that the material-diverting plate rotates with the follower; Wherein, the material shifting plate can reciprocate up and down when rotating along the inner wall of the material tube.

2. A twin-screw extruder according to claim 1, characterized in that: A plurality of material-moving rods are connected between the rotating shaft and the material-moving plate.

3. A twin-screw extruder according to claim 1, characterized in that: The rotating component includes a tube body arranged in the material tube, the bottom of the rotating shaft extends into the tube body and is connected to a first bevel gear, the top of the extrusion pipe is provided with a transmission shaft, one end of the transmission shaft extends into the tube body and is connected to a second bevel gear connected to the first bevel gear.

4. A twin-screw extruder according to claim 3, characterized in that: A corrugated ring is provided on the top of the material tube, the top of the material stripper plate extends to the top of the corrugated ring, a connecting shaft is rotatably connected in the tube body, the rotating shaft is slidably connected to the rotating shaft, and a spring is connected between the connecting shaft and the rotating shaft.

5. A twin-screw extruder according to claim 4, characterized in that: The rotating component further comprises a first motor connected to the extrusion pipe, and a driving shaft of the first motor is connected to the transmission shaft.

6. A twin-screw extruder according to claim 1, characterized in that: The driving component comprises a second motor connected to one side of the extrusion pipe, a chain transmission mechanism is arranged between the driving shaft of the second motor and the shaft of one of the screw mechanisms, and mutually meshing first gears are respectively connected to the shafts of the two screw mechanisms.

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