Novel double-screw extruder

Abstract

The invention relates to the technical field of plastic processing equipment, in particular to a novel double-screw extruder which comprises a base, a machine body is fixedly arranged on the base, an extrusion cavity is formed in the machine body, two parallel screws are horizontally and rotatably arranged in the extrusion cavity, a hot melting section is arranged in the middle of the machine body, and the hot melting section is arranged in the machine body. A heating pipe is fixedly installed on the hot melting section, a sampling opening is formed in the top of the hot melting section of the machine body, one end of the sampling opening is communicated with the extrusion cavity, the other end of the sampling opening extends out of the machine body, a sealing plug is arranged in the sampling opening, the sampling opening is sealed by the sealing plug, and the sealing plug is detachably connected with the sampling opening. The device has the advantages that the raw materials before forming in the extruder can be conveniently obtained, the viscosity of the raw materials before forming is detected, and the viscosity detection accuracy is improved.

Description

Technical Field

[0001] This application relates to the technical field of plastic processing equipment, and in particular to a new type of twin-screw extruder. Background Art

[0002] In the industrial production of thermoplastic elastomer (TPE) materials, a twin-screw extruder is the core equipment for realizing the melting and plasticizing of raw materials. The viscosity of the raw materials in the extruder has a great influence on the extrusion molding effect.

[0003] In the prior art, a common twin-screw extruder includes a base, on which a body is fixedly arranged. An extrusion cavity is provided in the body. Two parallel screws are horizontally and rotatably arranged in the extrusion cavity. At the top of one end of the body, there is a feeding port for raw materials to enter the extrusion cavity. The middle part of the body is a hot melting section, on which a heating pipe is fixedly installed. A die is provided at the end of the body. During operation, the raw materials enter the extrusion cavity from the feeding port, are conveyed and extruded by the screws, move in the direction close to the die, and are heated and raised in temperature by the heating pipe when passing through the hot melting section, and finally are extruded into formed materials through the die.

[0004] In the process of realizing this application, it is found that there are at least the following problems in this technology: In order to obtain the viscosity of the raw materials in the extruder, it is usually necessary to select a sample of the extruded and formed materials for detection. However, it is obvious that there will be errors in judging the viscosity of the raw materials in the extruder by using the formed materials. Summary of the Invention

[0005] In order to facilitate obtaining the raw materials in the extruder before forming, so as to detect the viscosity of the raw materials before forming and improve the accuracy of viscosity detection, this application provides a new type of twin-screw extruder.

[0006] The new type of twin-screw extruder provided by this application adopts the following technical solutions: A new type of twin-screw extruder includes a base, on which a body is fixedly arranged. An extrusion cavity is provided in the body. Two parallel screws are horizontally and rotatably arranged in the extrusion cavity. The middle part of the body is set as a hot melting section, on which a heating pipe is fixedly installed. A sampling port is arranged at the top of the hot melting section of the body. One end of the sampling port communicates with the extrusion cavity, and the other end of the sampling port extends to the outside of the body. A sealing plug is arranged in the sampling port. The sealing plug closes the sampling port, and the sealing plug is detachably connected to the sampling port.

[0007] By adopting the above technical solution, when it is necessary to detect the viscosity of the raw materials in the extruder, there is no need to sample the material after it is formed. Only the sealing plug needs to be removed to directly obtain the raw material sample at the hot melt section from the sampling port; this real-time sampling method avoids the viscosity error of the molding material caused by external factors such as cooling and pressure changes, and can more accurately reflect the actual viscosity state of the raw materials in the extruder, providing more reliable data support for process adjustments in the production process, thereby improving product quality.

[0008] Preferably, the sealing plug is threadedly connected to the sampling port.

[0009] By adopting the above technical solution, when the sealing plug needs to be disassembled or installed, the sealing plug is screwed in or loosened through the thread to seal or open the sampling port; on the one hand, the threaded connection has good sealing performance, which can prevent the raw materials in the extrusion chamber from leaking from the sampling port during normal production, thereby ensuring the normal operation of the extruder; on the other hand, when the sealing plug enters the sampling port, the raw materials adhered to the inner wall of the sampling port can be cleaned to a certain extent, thereby preventing the raw materials from accumulating or condensing on the inner wall of the sampling port, thereby causing unreliable sealing of the sampling port.

[0010] Preferably, a first mounting bracket and a second mounting bracket are provided on the base, a threaded shaft is vertically and threadedly engaged on the first mounting bracket, the bottom end of the threaded shaft is fixedly connected to the sealing plug, a movable gear is fixedly provided on the threaded shaft, a thick gear is rotatably provided on the first mounting bracket, the thick gear and the movable gear are meshed with each other, the thick gear is coaxial and fixedly connected to a driven pulley, a driving pulley is rotatably provided on the second mounting bracket, a transmission belt is provided between the driving pulley and the driven pulley, one end of the transmission belt is sleeved on the driven pulley, and the other end of the transmission belt is sleeved on the driving pulley.

[0011] By adopting the above technical solution, when the sealing plug needs to be disassembled or installed, the operator can stand at the second mounting frame and rotate the active pulley. The active pulley pulls the driven pulley to rotate through the transmission belt, and the thick gear rotates accordingly. The thick gear meshes with the movable gear, and the movable gear drives the threaded shaft to rotate. The threaded shaft moves up and down while rotating, thereby driving the sealing plug to move up and down, thereby opening and closing the sampling port with the sealing plug. In this way, there is no need to manually open the sealing plug at close range, preventing the extrusion chamber from suddenly bursting out due to excessive pressure of the raw material, which may cause burns to the operator. This minimizes the dangers of high temperature burns caused by manual direct operation of the sealing plug, thereby improving the safety of operation.

[0012] Preferably, the first mounting frame includes a supporting side plate and a limiting cross plate, the supporting side plate is arranged on the base, and two limiting cross plates are fixed on the supporting side plates, the two limiting cross plates are spaced apart in the vertical direction, the thick gear rotates between the two limiting cross plates, the threaded shaft is threadedly connected to the two limiting cross plates, the movable gear is located between the two limiting cross plates, the movable gear can be against the limiting cross plates, and the limiting cross plates prevent the movable gear from disengaging from the thick gear.

[0013] By adopting the above technical solution, the movable gear is located between the two limiting horizontal plates and can be offset against the limiting horizontal plates. The limiting horizontal plates play a limiting role, preventing the movable gear from disengaging from the thick gear. During the up and down movement of the threaded shaft, it can ensure that the movable gear always remains in meshing state with the thick gear, thereby ensuring the stability and reliability of the transmission.

[0014] Preferably, the second mounting bracket is located outside the hot melt section, and a control motor is fixedly mounted on the second mounting bracket. The drive shaft of the control motor is coaxially fixed to the driving pulley.

[0015] By adopting the above technical solution, the second mounting bracket is located outside the hot melt section, and the control motor is installed on the second mounting bracket, so that the control motor is away from the high temperature environment of the hot melt section, minimizing the impact of high temperature on motor performance and extending the service life of the control motor. When the sealing plug needs to be disassembled or installed, it is only necessary to start the control motor, and the drive shaft of the control motor drives the active pulley to rotate. The active pulley then drives the driven pulley to rotate through the transmission belt, and then drives the thick gear, movable gear, and threaded shaft to rotate in sequence, ultimately realizing the up and down movement of the sealing plug to open or close the sampling port. The opening and closing operations of the sealing plug are automated, and there is no need for manual rotation of the active pulley.

[0016] Preferably, the first mounting bracket is slidably connected to the base, and the second mounting bracket is provided with a clearance component, which is used to drive the first mounting bracket away from the sampling port.

[0017] By adopting the above technical solution, after the sealing plug is separated from the sampling port, the first mounting frame and the threaded shaft, sealing plug, driven pulley, thick gear, and movable gear on the first mounting frame are driven away from the sampling port through the giving way component, thereby providing a more spacious operating space for the sampling work and facilitating the acquisition of raw materials in the extruder from the sampling port.

[0018] Preferably, the first mounting bracket and the second mounting bracket are both slidably connected to the base along the axial direction of the screw rod, and the yielding assembly includes a cam, a stopper, and a common connecting rod, one end of the common connecting rod is fixedly connected to the first mounting bracket, and the other end of the common connecting rod is fixedly connected to the second mounting bracket, and the stopper is fixedly connected to the base, and the stopper is located between the second mounting bracket and the first mounting bracket, and the cam rotates on the side wall of the second mounting bracket, and the cam and the stopper are against each other.

[0019] By adopting the above technical solution, when a larger operating space is needed for sampling, the cam is rotated. As the cam rotates, the protrusion of the cam profile exerts a force on the block, which in turn exerts a reaction force on the cam. This reaction force pushes the second mounting bracket to slide on the base along the axis of the screw. The second mounting bracket is connected to the first mounting bracket by a common connecting rod, so the first mounting bracket moves synchronously with the second mounting bracket. This facilitates driving the first mounting bracket, along with its threaded shaft, sealing plug, driven pulley, thick gear, and movable gear, away from the sampling port, thereby providing a wider operating space for obtaining raw materials from the extruder through the sampling port and facilitating the operator's sampling operation.

[0020] Preferably, a roller is rotatably provided on the stopper, and the cam abuts against the roller.

[0021] By adopting the above technical solution, when the cam rotates, there is rolling friction between the cam and the roller; compared with the sliding friction generated by the direct contact between the cam and the block surface, the friction force of the rolling friction is smaller, and the driving force required for the cam to rotate is smaller, thereby reducing the driving force when driving the cam to rotate.

[0022] Preferably, a tension spring is provided between the stopper and the second mounting bracket, one end of the tension spring is fixedly connected to the stopper, and the other end of the tension spring is fixedly connected to the second mounting bracket, and the tension spring drives the second mounting bracket close to the stopper.

[0023] With this technical solution, when space is needed for sampling, the rotating cam pushes the second mounting bracket to slide. This causes the tension spring to stretch and store elastic energy. After sampling is complete, the cam rotates in the opposite direction. When the cam's raised portion clears the roller, the tension spring releases its elastic energy. The resulting tension forces the second mounting bracket toward the stop, achieving automatic reset.

[0024] Preferably, the yield assembly further includes a first bevel gear and a second bevel gear, the first bevel gear is coaxially fixed to the driving pulley, the second bevel gear is coaxially fixed to the cam, and the first bevel gear and the second bevel gear are meshed with each other.

[0025] By adopting the above technical solution, when the sealing plug needs to be opened, the motor is controlled to drive the active pulley to rotate, and at the same time the first bevel gear drives the second bevel gear to rotate, and then drives the cam to rotate. When the sealing plug is separated from the sampling port with the axial movement of the threaded shaft, the protrusion of the cam abuts against the roller, driving the first mounting bracket and the second mounting bracket to slide together, thereby providing a more spacious operating space for obtaining the raw materials in the extruder from the sampling port, and facilitating the sampling operation of the operator; in this way, the sealing plug is separated from the sampling port and the first mounting bracket moves away from the sampling port in sequence, thereby improving the degree of automation of the equipment.

[0026] In summary, the present application includes at least one of the following beneficial technical effects: 1. By setting up a sampling port and sealing plug, it is convenient to obtain raw material samples before molding directly from the hot melt section of the machine body, thus avoiding the viscosity detection error caused by cooling and pressure changes in traditional post-molding sampling, improving detection accuracy, providing reliable data support for process adjustment, and thus improving product quality; 2. By setting up the first mounting frame, the second mounting frame, the threaded shaft, the movable gear, the thick gear, the driven pulley, the active pulley, the transmission belt, the supporting side plate, the limit horizontal plate, and the control motor, it is convenient to control the motor to remotely drive the sealing plug to rise and fall, and try to prevent the raw material from suddenly bursting out of the extrusion cavity at the moment the sampling port is opened, causing burns to the operator. The control motor is kept away from the high temperature environment of the hot melt section to prevent it from being in a high temperature environment for a long time, thereby extending the service life of the equipment; 3. By setting the cam, block, common rod, roller, tension spring, first bevel gear and second bevel gear, the first mounting bracket can automatically give way after the sealing plug is opened, thereby expanding the sampling operation space. When resetting, the tension spring can automatically return to its original position, thereby simplifying the operation process. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a structural schematic diagram of a novel twin-screw extruder provided in the embodiments of the present application.

[0028] Figure 2 yes Figure 1 Enlarged view of part A.

[0029] Figure 3 It is a schematic diagram of the cross-sectional structure of a novel twin-screw extruder provided in the examples of the present application.

[0030] Figure 4 yes Figure 3 Magnified view of part B.

[0031] Description of reference numerals: 1. Base; 2. Machine body; 21. Extrusion cavity; 22. Screw; 23. Melting section; 231. Heating pipe; 232. Sampling port; 3. First mounting bracket; 31. Threaded shaft; 311. Plug; 32. Movable gear; 33. Thick gear; 34. Driven pulley; 35. Support side plate; 36. Limit cross plate; 4. Second mounting bracket; 41. Driving pulley; 42. Transmission belt; 43. Control motor; 5. Yielding component; 51. Cam; 52. Stop block; 53. Common connecting rod; 54. Roller; 55. Tension spring; 56. First bevel gear; 57. Second bevel gear. Detailed implementation manners

[0032] The following further describes the present application in detail with reference to the Figures 1-4 accompanying drawings.

[0033] An embodiment of the present application discloses a new type of twin-screw extruder. Referring to Figures 1 to 3 , it includes a base 1, and a machine body 2 is fixedly arranged on the base 1. An extrusion cavity 21 is formed in the machine body 2, and two parallel screws 22 are horizontally and rotatably arranged in the extrusion cavity 21. At the top of one end of the machine body 2, there is a feeding port for raw materials to enter the extrusion cavity 21. The middle part of the machine body 2 is set as a melting section 23, and a heating pipe 231 is fixedly installed on the melting section 23 for heating the raw materials in the extrusion cavity 21. At the other end of the machine body 2, there is a mold, so that the raw materials are extruded through the mold and initially formed.

[0034] Referring to Figure 3 and Figure 4 , a sampling port 232 is arranged at the top of the melting section 23 of the machine body 2. One end of the sampling port 232 communicates with the extrusion cavity 21, and the other end of the sampling port 232 extends to the outside of the machine body 2. A plug 311 is arranged in the sampling port 232. The plug 311 closes the sampling port 232, and the plug 311 is detachably connected to the sampling port 232. Specifically, the plug 311 is threadedly connected to the sampling port 232.

[0035] Referring to Figure 3 and Figure 4 , when it is necessary to detect the viscosity of the raw materials in the extruder, only need to unscrew the plug 311, and the raw material sample at the melting section 23 can be directly obtained from the sampling port 232. The viscosity error caused by external factors such as cooling and pressure change of the formed materials is avoided as much as possible, and the actual viscosity state of the raw materials in the extrusion machine body 2 can be reflected more accurately, providing more reliable data support for the process adjustment in the production process, thereby improving the product quality.

[0036] In order to prevent the raw materials in the machine body 2 from gushing out and scalding the operators when the plug 311 is unscrewed, referring to Figure 1 and Figure 4, a first mounting bracket 3 and a second mounting bracket 4 are slidably arranged on the base 1 along the axial direction of the screw rod 22. Among them, the first mounting bracket 3 is located at the hot melting section 23, and the second mounting bracket 4 is located outside the hot melting section 23. The first mounting bracket 3 includes a supporting side plate 35 and a limiting cross plate 36. The supporting side plate 35 is slidably arranged on the base 1, and two limiting cross plates 36 are horizontally and fixedly arranged on the supporting side plate 35, and the two limiting cross plates 36 are arranged at intervals in the vertical direction. A threaded shaft 31 is vertically and threadedly engaged on the limiting cross plate 36 of the first mounting bracket 3. The bottom end of the threaded shaft 31 is fixedly connected with a plug 311. The pitches of the threads on the threaded shaft 31 and the plug 311 are equal and the rotation directions are the same. A movable gear 32 is fixedly arranged on the threaded shaft 31. The movable gear 32 is located between the two limiting cross plates 36 and can abut against the limiting cross plate 36.

[0037] Refer to Figure 1 and Figure 4 , a thick gear 33 is rotatably arranged on the limiting cross plate 36 of the first mounting bracket 3. The thick gear 33 rotates between the two limiting cross plates 36. The thick gear 33 is meshed with the movable gear 32. The thickness of the thick gear 33 in the axial direction is greater than the thickness of the movable gear 32 in the axial direction. The distance between the thick gear 33 and any one of the limiting cross plates 36 is less than the thickness of the movable gear 32 in the axial direction. The limiting cross plate 36 prevents the movable gear 32 from disengaging from the thick gear 33.

[0038] Refer to Figure 2 and Figure 4 , the thick gear 33 is coaxially and fixedly connected with a driven pulley 34. A driving pulley 41 is rotatably arranged on the second mounting bracket 4. A transmission belt 42 is arranged between the driving pulley 41 and the driven pulley 34. One end of the transmission belt 42 is sleeved on the driven pulley 34, and the other end of the transmission belt 42 is sleeved on the driving pulley 41. A control motor 43 is fixedly arranged on the second mounting bracket 4. The driving shaft of the control motor 43 is coaxially fixed with the driving pulley 41.

[0039] Refer to Figures 1 to 4 , when it is necessary to unscrew the plug 311, start the control motor 43. The control motor 43 drives the driving pulley 41 to rotate. The driving pulley 41 drives the driven pulley 34 to rotate through the transmission belt 42, and the thick gear 33 rotates accordingly. The thick gear 33 is meshed with the movable gear 32, and the movable gear 32 drives the threaded shaft 31 to rotate. The threaded shaft 31 will move upward while rotating, thereby driving the plug 311 to move upward, realizing the automatic unscrewing of the plug 311. In this way, there is no need for manual operation to open the plug 311 at a close distance, preventing the raw materials in the extrusion cavity 21 from suddenly surging out due to too high pressure of the raw materials or the agitation of the screw rod 22, causing burns to the operators.

[0040] In order to provide a larger operating space for the operation of sampling from the sampling port 232, refer to Figure 1and Figure 2 The yield assembly 5 includes a cam 51, a stopper 52, a common connecting rod 53, a first bevel gear 56, and a second bevel gear 57. The first bevel gear 56 is coaxially fixed to the driving pulley 41. One end of the common connecting rod 53 is fixedly connected to the first mounting frame 3, and the other end of the common connecting rod 53 is fixedly connected to the second mounting frame 4. The stopper 52 is fixedly connected to the base 1, and the stopper 52 is located between the second mounting frame 4 and the first mounting frame 3. The cam 51 rotates on the side wall of the second mounting frame 4, and the cam 51 abuts against the stopper 52. Specifically, a roller 54 is rotatably provided on the stopper 52, and the cam 51 abuts against the roller 54. The second bevel gear 57 is coaxially fixed to the cam 51, and the first bevel gear 56 and the second bevel gear 57 are meshed with each other. A tension spring 55 is provided between the stop block 52 and the second mounting frame 4 , one end of the tension spring 55 is fixedly connected to the stop block 52 , and the other end of the tension spring 55 is fixedly connected to the second mounting frame 4 , and the tension spring 55 drives the second mounting frame 4 close to the stop block 52 .

[0041] Figure 1 and Figure 2 , while the control motor 43 drives the driving pulley 41 to rotate, the first bevel gear 56 drives the second bevel gear 57 to rotate, which in turn drives the cam 51 to rotate. When the sealing plug 311 moves axially with the threaded shaft 31 and disengages from the sampling port 232, the protrusion of the cam 51 abuts against the roller 54, driving the first mounting bracket 3 and the second mounting bracket 4 to slide together. This provides more room for obtaining raw materials from the extruder through the sampling port 232, facilitating the operator's sampling operation. This achieves the sequential movement of the sealing plug 311 disengaging from the sampling port 232 and the first mounting bracket 3 moving away from the sampling port 232.

[0042] The implementation principle of a new type of twin-screw extruder in an embodiment of this application is as follows: During normal production, the sealing plug 311 closes the sampling port 232 to prevent the leakage of raw materials in the extrusion chamber 21. When it is necessary to detect the viscosity of the raw materials, the control motor 43 is started, and the control motor 43 drives the driving pulley 41 to rotate. The driving pulley 41 makes the driven pulley 34 and the thick gear 33 rotate synchronously through the transmission belt 42. The thick gear 33 meshes with the movable gear 32, drives the threaded shaft 31 to rotate, and the sealing plug 311 moves upward along with the threaded shaft 31 and gradually disengages from the sampling port 232. During this process, the first bevel gear 56 coaxial with the driving pulley 41 synchronously drives the second bevel gear 57 and the cam 51 to rotate clockwise. However, since the non-protruding part of the initial position of the cam 51 contacts the roller 54, the second mounting bracket 4 is not pushed temporarily. When the sealing plug 311 completely disengages from the sampling port 232, the cam 51 rotates to the protruding part and abuts against the roller 54. The protrusion of the cam 51 pushes the roller 54 to make the second mounting bracket 4 slide. The first mounting bracket 3 moves synchronously with the second mounting bracket 4 through the coaxial rod 53 and moves away from the sampling port 232. Thus, sufficient space is created for the sampling operation. After the sampling is completed, the control motor 43 rotates in the reverse direction. The first bevel gear 56 drives the cam 51 to rotate in the reverse direction through the second bevel gear 57. The protruding part disengages from the roller 54, and the tension spring 55 releases elastic potential energy, pulling the second mounting bracket 4 back to the initial position. The first mounting bracket 3 is reset synchronously, so that the sealing plug 311 aligns with the sampling port 232. The control motor 43 continues to operate, and the driving pulley 41 drives the threaded shaft 31 to rotate in the reverse direction. The sealing plug 311 moves downward to approach the sampling port 232 until the sealing plug 311 is completely screwed into the sampling port 232 to restore the closed state. In this way, it is convenient to obtain the raw materials in the extruder before molding to detect the viscosity of the raw materials before molding and improve the accuracy of viscosity detection.

[0043] The above are all the preferred embodiments of this application, and the protection scope of this application is not limited thereby. Therefore, all equivalent changes made according to the structure, shape, and principle of this application should be covered within the protection scope of this application.

Claims

1. A novel twin-screw extruder, comprising a base (1), a body (2) is fixedly arranged on the base (1), an extrusion cavity (21) is formed in the body (2), two parallel screws (22) are horizontally and rotatably arranged in the extrusion cavity (21), the middle part of the body (2) is set as a hot-melt section (23), and a heating pipe (231) is fixedly installed on the hot-melt section (23), characterized in that: A sampling port (232) is provided at the top of the hot melt section (23) of the body (2), one end of the sampling port (232) is connected to the extrusion cavity (21), and the other end of the sampling port (232) extends to the outside of the body (2), and a sealing plug (311) is provided in the sampling port (232), and the sealing plug (311) closes the sampling port (232), and the sealing plug (311) and the sampling port (232) are detachably connected.

2. The novel twin-screw extruder according to claim 1, wherein: The sealing plug (311) is threadedly connected to the sampling port (232).

3. A novel twin-screw extruder according to claim 1, characterized in that: The base (1) is provided with a first mounting frame (3) and a second mounting frame (4); a threaded shaft (31) is vertically and threadedly engaged on the first mounting frame (3); the bottom end of the threaded shaft (31) is fixedly connected to the sealing plug (311); a movable gear (32) is fixedly provided on the threaded shaft (31); a thick gear (33) is rotatably provided on the first mounting frame (3); the thick gear (33) and the movable gear (32) are meshed with each other; the thick gear (33) is coaxially and fixedly connected to a driven pulley (34); a driving pulley (41) is rotatably provided on the second mounting frame (4); a transmission belt (42) is provided between the driving pulley (41) and the driven pulley (34); one end of the transmission belt (42) is sleeved on the driven pulley (34), and the other end of the transmission belt (42) is sleeved on the driving pulley (41).

4. A novel twin-screw extruder according to claim 3, characterized in that: The first mounting frame (3) includes a supporting side plate (35) and a limiting transverse plate (36). The supporting side plate (35) is arranged on the base (1). Two limiting transverse plates (36) are fixed on the supporting side plate (35). The two limiting transverse plates (36) are spaced apart in the vertical direction. The thick gear (33) rotates between the two limiting transverse plates (36). The threaded shaft (31) is threadedly connected to the two limiting transverse plates (36). The movable gear (32) is located between the two limiting transverse plates (36). The movable gear (32) can be against the limiting transverse plate (36). The limiting transverse plate (36) prevents the movable gear (32) from disengaging from the thick gear (33).

5. A novel twin-screw extruder according to claim 3, characterized in that: The second mounting frame (4) is located outside the hot melt section (23), and a control motor (43) is fixedly arranged on the second mounting frame (4). The driving shaft of the control motor (43) is coaxially fixed with the driving pulley (41).

6. A novel twin-screw extruder according to claim 3, wherein: The first mounting frame (3) is slidably connected to the base (1), and a clearance component (5) is provided on the second mounting frame (4), and the clearance component (5) is used to drive the first mounting frame (3) away from the sampling port (232).

7. A novel twin-screw extruder according to claim 6, characterized in that: The first mounting frame (3) and the second mounting frame (4) are both slidably connected to the base (1) along the axial direction of the screw rod (22); the yielding assembly (5) comprises a cam (51), a stopper (52), and a common connecting rod (53); one end of the common connecting rod (53) is fixedly connected to the first mounting frame (3); the other end of the common connecting rod (53) is fixedly connected to the second mounting frame (4); the stopper (52) is fixedly connected to the base (1); the stopper (52) is located between the second mounting frame (4) and the first mounting frame (3); the cam (51) rotates on the side wall of the second mounting frame (4); the cam (51) and the stopper (52) abut against each other.

8. A novel twin-screw extruder according to claim 7, characterized in that: A roller (54) is rotatably provided on the stopper (52), and the cam (51) abuts against the roller (54).

9. A novel twin-screw extruder according to claim 7, characterized in that: A tension spring (55) is provided between the stopper (52) and the second mounting frame (4); one end of the tension spring (55) is fixedly connected to the stopper (52), and the other end of the tension spring (55) is fixedly connected to the second mounting frame (4); the tension spring (55) drives the second mounting frame (4) to approach the stopper (52).

10. A novel twin-screw extruder according to claim 7, characterized in that: The yield assembly (5) further comprises a first bevel gear (56) and a second bevel gear (57); the first bevel gear (56) is coaxially fixed to the driving pulley (41); the second bevel gear (57) is coaxially fixed to the cam (51); and the first bevel gear (56) and the second bevel gear (57) are meshed with each other.

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