A defoaming masterbatch mixture detection device in the extrusion channel of an extruder

Abstract

The invention discloses a device for detecting a defoaming masterbatch mixture in an extrusion channel of an extruder, and relates to the technical field of plastic processing. The device comprises a mounting mechanism, and also comprises: a viscosity detection mechanism, which is mounted in the mounting mechanism and comprises a uniform detection mechanism and a flow resistance reduction mechanism, wherein the uniform detection mechanism obtains the cross-sectional viscosity of the mixture in a barrel, and the flow resistance reduction mechanism enables the mixture to flow; a continuous detection mechanism, which is connected to the viscosity detection mechanism and is used for continuous data acquisition; during detection, the device uses gravity to pull the movement time and speed curve of a built-in resistance structure in the material, thereby acquiring viscosity data of the material on the path, providing data for subsequent addition of materials, and when acquiring data, multiple resistance structures are used to match each other to uniformly and comprehensively acquire viscosity data of each position of the material, and when the application is not needed, the resistance of the built-in resistance structure to the material can be reduced, thereby ensuring uniform speed feeding of the material and avoiding affecting the supply of the material.

Description

Technical Field

[0001] The invention relates to the technical field of plastic processing, in particular to a device for detecting a defoaming masterbatch mixture in an extrusion channel of an extruder. Background Art

[0002] Extruder is a type of plastic machinery, including injection molding extruder and plastic pellet extruder. The extruder head can be divided into right-angle head and bevel head according to the direction of material flow in the head and the angle between the center line of the screw.

[0003] 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. The extruder is fed by gravity to the top of the auger, and then heated and melted after mixing by the auger. When the raw materials are fed, the viscosity of each part of the melted material in a certain section of the extrusion channel will have certain differences due to factors such as uneven material distribution. It is necessary to add material compensation to make the melted material more uniform and make the material uniformly formed, so it is necessary to obtain the material viscosity data and compensate for it. Summary of the invention

[0004] The present invention provides a defoaming masterbatch mixed material detection device in an extrusion channel of an extruder to solve the above-mentioned deficiencies in the prior art.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A defoaming masterbatch mixed material detection device in an extrusion channel of an extruder comprises a mounting mechanism and also comprises:

[0007] A viscosity detection mechanism, which is installed in the installation mechanism, includes a uniform detection mechanism and a flow resistance reduction mechanism, wherein the uniform detection mechanism obtains the cross-sectional viscosity of the mixture in the cylinder, and the flow resistance reduction mechanism allows the mixture to flow;

[0008] A continuous detection mechanism, which is connected to the viscosity detection mechanism and is used for continuous data acquisition;

[0009] A mixing mechanism, which is installed inside the installation mechanism and is used to mix the material around the viscosity detection mechanism;

[0010] The driving mechanism is installed on the viscosity detection mechanism, connected with the continuous detection mechanism and the mixing mechanism, and drives the two to operate.

[0011] Preferably, the mounting mechanism comprises a cylinder, and flanges are fixed to both ends of the cylinder.

[0012] Preferably, the uniformity detection mechanism includes an annular groove formed on the inner wall of the cylinder, a gas channel 1 connected to the outside of the cylinder is formed on one side of the annular groove, a box is sealed and fixed to the outer wall of the bottom of the cylinder, the gas channel 1 is communicated with the box, a piston plate is sleeved inside the box, a gas outlet is formed at the bottom of the box, a laser detector is fixed to the bottom of the box, a gas channel 2 connected to the outside of the cylinder is formed on the other side of the annular groove, an annular piston plate is sleeved inside the annular groove, an inner cylinder is fixed on the inner wall of the annular piston plate, the inner cylinder is tightly attached to the inner wall of the cylinder to seal the annular groove, a resistance ring 1 is fixed on the inner wall of the inner cylinder, a resistance ring 2 is sleeved inside the resistance ring 1, and a resistance plate is sleeved inside the resistance ring 2.

[0013] Preferably, the flow resistance reduction mechanism comprises a mounting rod fixed to the inner wall of the cylinder, and a limiting rod is fixed to a side of the mounting rod facing the resistance plate;

[0014] Two mounting plates 1 are fixed to the side of the resistance ring 2 away from the limiting rod, and a large-head connecting rod 1 is fixed to the side of the mounting plate 1 facing the limiting rod, and the large-head connecting rod 1 is movably sleeved inside the resistance ring 1;

[0015] Two mounting plates 2 are fixed to the side of the resistance plate away from the limiting rod, and a large-end connecting rod 2 is fixed to the side of the mounting plate 2 facing the limiting rod. The large-end connecting rod 2 is movably sleeved inside the resistance ring 2.

[0016] Preferably, the continuous detection mechanism includes a U-shaped frame fixed to the bottom of the box body, the bottom inner wall of the U-shaped frame is rotatably connected to a reciprocating screw, a gear 2 is installed on the outside of the bottom end of the reciprocating screw, the external thread sleeve of the reciprocating screw is provided with a threaded barrel, the top of the threaded barrel is fixed with an electromagnetic plate, the electromagnetic plate is attracted to the piston plate when energized, a limiting plate is fixed to the outside of the bottom end of the threaded barrel, the internal sleeve of the limiting plate is provided with a guide rod, and the bottom end of the guide rod is fixedly connected to the U-shaped frame.

[0017] Preferably, the mixing mechanism passes through a rotating shaft which is sealed and rotatably connected to the bottom of the cylinder, a gear three is installed at the bottom end of the rotating shaft, and a plurality of stirring rods are fixed to the outer surface of the rotating shaft located inside the cylinder.

[0018] Preferably, the driving mechanism includes a motor fixed to the bottom of the box, and a gear 1 is fixed to one end of the output shaft of the motor, one side of the gear 1 is meshed with the gear 2, and the other side of the gear 1 is meshed with the gear 3.

[0019] Preferably, an alarm is fixed on the top of the cylinder, and a controller is installed on one side of the box, and the controller is electrically connected to the motor, the laser detector, the electromagnetic plate and the alarm respectively.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] 1. When the viscosity detection mechanism is installed in the present invention, the movement time and speed curve of the built-in resistance structure in the material is pulled by gravity to obtain the viscosity data of the material on the path, and provide data for subsequent material addition. When acquiring data, multiple resistance structures are used to match each other to evenly and comprehensively obtain the viscosity data of each position of the material. Moreover, when the present application is not needed, the resistance of the built-in resistance structure to the material can be reduced, thereby ensuring the uniform feeding of the material and avoiding affecting the supply of the material.

[0022] 2. The present invention installs a mixing mechanism to mix the materials at the detection position, thereby improving the uniformity of material detection and improving the detection accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a three-dimensional first-view structural schematic diagram of a defoaming masterbatch mixture detection device in an extrusion channel of an extruder proposed by the present invention.

[0024] Figure 2 This is a schematic diagram of the three-dimensional second-viewing angle structure of a defoaming masterbatch mixture detection device in an extrusion channel of an extruder proposed by the present invention.

[0025] Figure 3 The present invention is a schematic diagram of the overall cross-sectional structure of a defoaming masterbatch mixture detection device in an extrusion channel of an extruder.

[0026] Figure 4 The present invention is a schematic diagram of the cross-sectional structure of a barrel of a defoaming masterbatch mixture detection device in an extrusion channel of an extruder.

[0027] Figure 5 The present invention is a schematic diagram of the structure of a flow resistance reduction mechanism of a defoaming masterbatch mixture detection device in an extrusion channel of an extruder.

[0028] Figure 6 The present invention is a schematic cross-sectional structure diagram of a continuous detection mechanism of a defoaming masterbatch mixture detection device in an extrusion channel of an extruder.

[0029] In the figure: 1, installation mechanism; 11, cylinder; 12, flange; 2, viscosity detection mechanism; 21, annular groove; 22, gas channel 1; 23, box; 24, gas outlet; 25, piston plate; 26, laser detector; 27, gas channel 2; 28, annular piston plate; 29, inner cylinder; 210, resistance ring 1; 211, big head connecting rod 1; 212, installation plate 1; 213, resistance ring 2; 214, Big head connecting rod two; 215, mounting plate two; 216, resistance plate; 217, mounting rod; 218, limit rod; 3, continuous detection mechanism; 31, U-shaped frame; 32, reciprocating screw; 33, threaded barrel; 34, limit plate; 35, guide rod; 36, gear two; 4, driving mechanism; 41, motor; 42, gear one; 5, mixing mechanism; 51, rotating shaft; 52, gear three; 53, stirring rod; 6, alarm. DETAILED DESCRIPTION

[0030] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0031] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0032] In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined. In addition, the terms "installed", "connected" and "connected" should 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 it can be indirectly connected through an intermediate medium, or it can be a connection between the 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 the specific circumstances.

[0033] Example: Refer to Figure 1-Figure 6: A defoaming masterbatch mixture detection device in an extruder extrusion channel, comprising a mounting mechanism 1, and also comprising:

[0034] The viscosity detection mechanism 2 is installed in the installation mechanism 1, and includes a uniform detection mechanism and a flow resistance reduction mechanism. The uniform detection mechanism obtains the cross-sectional viscosity of the mixture in the cylinder, and the flow resistance reduction mechanism allows the mixture to flow;

[0035] The piston plate 25 of the viscosity detection mechanism 2 moves downward by its own gravity, and the gas in the annular groove 21 is sucked into the interior of the box body 23, and the annular piston plate 28 is pulled to drive the inner cylinder 29 to move, and the movement of the inner cylinder 29 pulls the resistance ring 1 210 to move, and the resistance ring 1 210 contacts the mounting plate 1 212 during the movement and pushes it and the resistance ring 2 213 to move, and the movement of the resistance ring 213 pushes the mounting plate 215 and the resistance plate 216 to move, so that the resistance ring 1 210, the resistance ring 213 and the resistance plate 216 present a plane, and the resistance ring 1 210, the resistance ring 213 and the resistance plate 216 are combined into a plane to The viscosity of the material in the entire cross section is detected. The higher the viscosity, the slower the resistance ring and the resistance plate 216 move, and the corresponding piston plate 25 moves down more slowly. At this time, the laser detector 26 obtains the downward speed of the piston plate 25. The downward speed includes the downward time from the top to the bottom and the speed curve during the downward movement. The speed curve reflects the resistance size at each position during the entire path movement of the resistance ring and the resistance plate 216. For example, if there are several sections in the entire path where the material is too viscous, the piston plate 25 will move down a little slower. If there are several sections where the material is too thin, the movable plate will move down a little faster. Then the laser sensor transmits the data to the controller;

[0036] A continuous detection mechanism 3, which is connected to the viscosity detection mechanism 2 and is used for continuous data acquisition;

[0037] The electromagnetic plate is started to attract the piston plate 25, and then the motor 41 is started to drive the gear 42 to rotate. The rotation of the gear 42 drives the reciprocating screw 32 to rotate, so that the reciprocating screw 32 drives the threaded barrel 33 to move up and down, pulls the piston plate 25 to move up and down, and makes the resistance ring and the resistance plate 216 move back and forth to detect the viscosity of the material.

[0038] A mixing mechanism 5, which is installed inside the installation mechanism 1 and is used to mix the material around the viscosity detection mechanism 2;

[0039] The mixing mechanism 5, gear one 42 rotates and drives gear three 52, shaft 51 and stirring rod 53 to rotate, mixing the flowing materials to improve the detection accuracy;

[0040] The driving mechanism 4 is installed on the viscosity detection mechanism 2, and is connected with the continuous detection mechanism 3 and the mixing mechanism 5, and drives the two to operate.

[0041] The mounting mechanism 1 comprises a cylinder 11 , and flanges 12 are fixed to both ends of the cylinder 11 .

[0042] The uniform detection mechanism includes an annular groove 21 formed on the inner wall of the cylinder 11, a gas channel 22 communicating with the outside of the cylinder 11 is formed on one side of the annular groove 21, a box 23 is sealed and fixed to the bottom outer wall of the cylinder 11, the gas channel 22 is communicated with the box 23, a piston plate 25 is sleeved inside the box 23, a gas outlet 24 is formed at the bottom of the box 23, a laser detector 26 is fixed to the bottom of the box 23, a gas channel 27 communicating with the outside of the cylinder 11 is formed on the other side of the annular groove 21, an annular piston plate 28 is sleeved inside the annular groove 21, an inner cylinder 29 is fixed to the inner wall of the annular piston plate 28, the inner cylinder 29 is tightly against the inner wall of the cylinder 11 to seal the annular groove 21, a resistance ring 210 is fixed to the inner wall of the inner cylinder 29, a resistance ring 213 is sleeved inside the resistance ring 210, and a resistance plate 216 is sleeved inside the resistance ring 213.

[0043] The flow resistance reduction mechanism includes a mounting rod 217 fixed to the inner wall of the cylinder 11, and a limiting rod 218 is fixed to one side of the mounting rod 217 facing the resistance plate 216;

[0044] Two mounting plates 1 212 are fixed to one side of the resistance ring 213 away from the limiting rod 218, and a large-head connecting rod 1 211 is fixed to one side of the mounting plate 1 212 facing the limiting rod 218. The large-head connecting rod 1 211 is movably sleeved inside the resistance ring 1 210;

[0045] Two second mounting plates 215 are fixed to one side of the resistance plate 216 away from the limiting rod 218 , and a second large-end connecting rod 214 is fixed to one side of the second mounting plate 215 facing the limiting rod 218 . The second large-end connecting rod 214 is movably sleeved inside the second resistance ring 213 .

[0046] The continuous detection mechanism 3 includes a U-shaped frame 31 fixed to the bottom of the box body 23, and the bottom inner wall of the U-shaped frame 31 is rotatably connected to a reciprocating screw 32, and a gear 2 36 is installed on the outside of the bottom end of the reciprocating screw 32. The external thread sleeve of the reciprocating screw 32 is provided with a threaded barrel 33, and the top of the threaded barrel 33 is fixed with an electromagnetic plate, which is attracted to the piston plate 25 after being energized. A limit plate 34 is fixed to the outside of the bottom end of the threaded barrel 33, and a guide rod 35 is sleeved inside the limit plate 34. The bottom end of the guide rod 35 is fixedly connected to the U-shaped frame 31.

[0047] The mixing mechanism 5 penetrates a rotating shaft 51 which is sealed and rotatably connected to the bottom of the cylinder 11 , a gear 3 52 is installed at the bottom of the rotating shaft 51 , and a plurality of stirring rods 53 are fixed to the outer surface of the rotating shaft 51 located inside the cylinder 11 .

[0048] The driving mechanism 4 includes a motor 41 fixed to the bottom of the box body 23 , and a gear 1 42 is fixed to one end of the output shaft of the motor 41 , one side of the gear 1 42 is meshed with the gear 2 36 , and the other side of the gear 1 42 is meshed with the gear 3 52 .

[0049] An alarm 6 is fixed on the top of the cylinder 11 , and a controller is installed on one side of the box 23 . The controller is electrically connected to the motor 41 , the laser detector 26 , the electromagnetic plate and the alarm 6 , respectively.

[0050] Working principle:

[0051] First, the device is connected to the extrusion channel through the flange 12. When the screw of the extrusion channel feeds the material, the material will be mixed. The mixed material will pass through the inside of the cylinder 11. The thrust of the material will push the resistance ring 1 210, the resistance ring 213 and the resistance plate 216 to move. During the movement, the resistance ring 1 210 pulls the inner cylinder 29 and the annular piston plate 28 to move. The annular piston plate 28 moves in the annular groove 21. The movement of the annular piston plate 28 discharges the gas in the annular groove 21 from the gas channel 27, and the other side of the annular piston plate 28 generates negative pressure, and the gas in the box body 23 is drawn into the inside of the annular groove 21 through the gas channel 1 22. The negative pressure causes the piston plate 25 to move up in the box body 23. When the piston plate 25 moves up, the gas enters the bottom of the piston plate 25 through the air outlet 24. After the annular piston plate 28 moves to the other side of the annular groove 21, it cannot continue to move forward. The plug plate 25 also moves to the top position of the box body 23, and the resistance plate 216 contacts the limit rod 218 when the annular piston plate 28 moves halfway, and is limited by the limit rod 218 and cannot move further, while the resistance ring 213 continues to move along the big head connecting rod 214. After moving to the end of the big head connecting rod 214, the end of the big head connecting rod 214 limits the resistance ring 213, so that it cannot move further, and the resistance ring 1 210 continues to move along the big head connecting rod 1 211. After moving to the end of the big head connecting rod 1 211, the resistance ring 1 210 cannot move further. At this time, the annular piston plate 28 has also moved to the other side of the annular groove 21. At this time, the resistance plate 216, the resistance ring 213 and the resistance ring 1 210 are conical structures. The three are not on the same plane, which can greatly reduce the resistance to material flow and ensure the smoothness of material flow.

[0052] When the extruder stops feeding, the material inside the cylinder 11 stops flowing. Without the thrust of the flowing material, the piston plate 25 moves downward by its own gravity, and the gas in the annular groove 21 is sucked into the interior of the box 23, and the annular piston plate 28 is pulled to drive the inner cylinder 29 to move. The movement of the inner cylinder 29 pulls the resistance ring 1 210 to move. During the movement of the resistance ring 1 210, it contacts the mounting plate 1 212 and pushes it and the resistance ring 2 213 to move. The movement of the resistance ring 213 pushes the mounting plate 215 and the resistance plate 216 to move, so that the resistance ring 1 210, the resistance ring 213 and the resistance plate 216 are flat. After the resistance ring 1 210, the resistance ring 213 and the resistance plate 216 are combined into a plane, the viscosity of the entire cross-section of the material is tested. The higher the resistance ring and the resistance plate 216 are, the slower they move, and the corresponding piston plate 25 moves down more slowly. At this time, the laser detector 26 obtains the downward speed of the piston plate 25. The downward speed includes the downward time from the top to the bottom and the speed curve during the downward movement. The speed curve reflects the resistance size at each position during the entire path movement of the resistance ring and the resistance plate 216. For example, if there are several sections of material that are too viscous in the entire path, the speed of the piston plate 25 moving down will be slightly slower. If there are several sections of material that are too thin, the speed of the movable plate moving down will be slightly faster. Then the laser sensor transmits the data to the controller, and the controller remotely transmits the judgment data to the main controller. The main controller improves the data when the section of material moves later, such as adjusting the temperature or adding materials that reduce viscosity.

[0053] When the extruder continues to feed at a uniform speed, the electromagnetic plate is started and attracted to the piston plate 25, and then the motor 41 is started to drive the gear 1 42 to rotate. The rotation of the gear 1 42 drives the reciprocating screw 32 to rotate, so that the reciprocating screw 32 drives the threaded barrel 33 to move back and forth up and down, pulling the piston plate 25 to move back and forth up and down, and making the resistance ring and the resistance plate 216 move back and forth to detect the viscosity of the material. The gear 1 42 rotates and drives the gear 3 52, the rotating shaft 51 and the stirring rod 53 to rotate, so as to mix the flowing material and improve the detection accuracy.

[0054] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A defoaming masterbatch mixture detection device in an extrusion channel of an extruder, comprising a mounting mechanism (1), characterized in that: Also includes: The viscosity detection mechanism (2) is installed in the installation mechanism (1), and comprises a uniformity detection mechanism and a flow resistance reduction mechanism, wherein the uniformity detection mechanism obtains the cross-sectional viscosity of the mixed material in the cylinder, and the flow resistance reduction mechanism allows the mixed material to flow; A continuous detection mechanism (3), which is connected to the viscosity detection mechanism (2) and is used for continuously acquiring data; A mixing mechanism (5) installed inside the installation mechanism (1) and used to mix the material around the viscosity detection mechanism (2); A driving mechanism (4) is mounted on the viscosity detection mechanism (2), connected to the continuous detection mechanism (3) and the mixing mechanism (5), and drives the two to operate; The mounting mechanism (1) comprises a cylinder (11), and flanges (12) are fixed to both ends of the cylinder (11); The uniformity detection mechanism comprises an annular groove (21) formed on the inner wall of the cylinder (11); a gas passage (22) communicating with the outside of the cylinder (11) is formed on one side of the annular groove (21); a box (23) is sealed and fixed to the outer wall of the bottom of the cylinder (11); the gas passage (22) communicates with the box (23); a piston plate (25) is sleeved inside the box (23); a gas outlet (24) is formed at the bottom of the box (23); a laser detector (26) is fixed to the bottom of the box (23); and the annular groove is provided with a gas outlet (24). The other side of the annular groove (21) is provided with a second gas channel (27) which is in communication with the outside of the cylinder (11); an annular piston plate (28) is sleeved inside the annular groove (21); an inner cylinder (29) is fixed to the inner wall of the annular piston plate (28); the inner cylinder (29) is tightly attached to the inner wall of the cylinder (11) to seal the annular groove (21); a resistance ring (210) is fixed to the inner wall of the inner cylinder (29); a resistance ring (213) is sleeved inside the resistance ring (210); a resistance plate (216) is sleeved inside the resistance ring (213); The flow resistance reduction mechanism comprises a mounting rod (217) fixed to the inner wall of the cylinder (11), and a limiting rod (218) is fixed on a side of the mounting rod (217) facing the resistance plate (216); Two mounting plates (212) are fixed to the side of the resistance ring (213) away from the limiting rod (218), and a large-head connecting rod (211) is fixed to the side of the mounting plate (212) facing the limiting rod (218), and the large-head connecting rod (211) is movably sleeved inside the resistance ring (210); Two second mounting plates (215) are fixed to the side of the resistance plate (216) away from the limiting rod (218), and a second large-end connecting rod (214) is fixed to the side of the second mounting plate (215) facing the limiting rod (218), and the second large-end connecting rod (214) is movably sleeved inside the second resistance ring (213).

2. The defoaming masterbatch mixture detection device in the extrusion channel of an extruder according to claim 1, characterized in that: The continuous detection mechanism (3) comprises a U-shaped frame (31) fixed to the bottom of the box body (23); a reciprocating screw (32) is rotatably connected to the inner wall of the bottom of the U-shaped frame (31); a second gear (36) is externally mounted on the bottom end of the reciprocating screw (32); a threaded barrel (33) is sleeved on the external thread of the reciprocating screw (32); an electromagnetic plate is fixed to the top of the threaded barrel (33); the electromagnetic plate attracts the piston plate (25) when energized; a limiting plate (34) is fixed to the outside of the bottom end of the threaded barrel (33); a guide rod (35) is sleeved inside the limiting plate (34); and the bottom end of the guide rod (35) is fixedly connected to the U-shaped frame (31).

3. The defoaming masterbatch mixture detection device in the extrusion channel of an extruder according to claim 2, characterized in that: The mixing mechanism (5) penetrates a rotating shaft (51) which is sealed and rotatably connected to the bottom of the cylinder (11); a gear three (52) is mounted on the bottom end of the rotating shaft (51); and a plurality of stirring rods (53) are fixed to the outer surface of the rotating shaft (51) located inside the cylinder (11).

4. The defoaming masterbatch mixture detection device in the extrusion channel of the extruder according to claim 3 is characterized in that: The driving mechanism (4) comprises a motor (41) fixed to the bottom of the box (23); a gear 1 (42) is fixed to one end of the output shaft of the motor (41); one side of the gear 1 (42) is meshed with a gear 2 (36); and the other side of the gear 1 (42) is meshed with a gear 3 (52).

5. The defoaming masterbatch mixture detection device in the extrusion channel of the extruder according to claim 4, characterized in that: An alarm (6) is fixed on the top of the cylinder (11), and a controller is installed on one side of the box (23), wherein the controller is electrically connected to the motor (41), the laser detector (26), the electromagnetic plate and the alarm (6), respectively.

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