Plugging device and extruder

Abstract

The utility model relates to the technical field of extruders, in particular to a plugging device and an extruder. The plugging device is used for plugging or opening a nozzle of the extruder. The plugging device comprises a plugging mechanism and a driving mechanism. The blocking mechanism is located on the outer side of the nozzle, installation is convenient, the blocking mechanism can be prevented from being heated, and therefore the situations of deformation and material leakage of all the mechanisms are avoided. The blocking mechanism is rotationally connected with the nozzle, the driving mechanism is connected with the blocking mechanism, the blocking device drives the blocking mechanism to rotate relative to the nozzle through the driving mechanism so as to achieve cutting of tailings of the nozzle and opening or blocking of the nozzle, the structure is simple, operation is convenient and fast, the blocking device can be suitable for any extruder with the nozzle needing to prevent material trailing, and universality is high.

Description

Technical Field

[0001] The utility model relates to the technical field of extruders, in particular to a blocking device and an extruder. Background Art

[0002] At present, there is a problem of material tailing in the nozzle after the extruder stops. The existing method to solve the nozzle tailing is to modify the nozzle, that is, to provide a structure similar to a one-way valve inside the nozzle. When the machine starts working, the pressure inside the nozzle compresses the butterfly spring, the valve port opens, and the material flows out; when the machine stops working, the butterfly spring returns to its original state and the valve port closes.

[0003] The above-mentioned anti-tailing method has the defect of complex nozzle structure. The one-way valve structure is difficult to disassemble and assemble in a narrow space. The nozzle is continuously heated during operation, causing deformation of the internal valve structure, resulting in failure of valve port sealing and leakage.

[0004] The above contents are only used to assist in understanding the technical solution of the present utility model and do not constitute an admission that the above contents are prior art. Utility Model Content

[0005] The main purpose of the utility model is to provide a plugging device, aiming to solve the technical problems of the existing anti-tailing nozzle having a complex structure, being difficult to disassemble and assemble, and being easily deformed by heat.

[0006] In order to achieve the above-mentioned purpose, the plugging device proposed in the utility model is applied to an extruder, wherein the extruder is provided with a nozzle, and the plugging device comprises:

[0007] A blocking mechanism rotatably disposed outside the nozzle; and

[0008] A driving mechanism is provided on the extruder, the driving mechanism is connected to the blocking mechanism, and the driving mechanism drives the blocking mechanism to rotate relative to the nozzle to open or block the nozzle.

[0009] Optionally, the blocking mechanism comprises:

[0010] a blocking member rotatably connected to the nozzle; and

[0011] A pushing member, the pushing member is arranged on the blocking member, and the driving mechanism is connected to the pushing member;

[0012] Wherein, the driving mechanism drives the pushing member to drive the blocking member to rotate relative to the nozzle, so that the blocking member opens or blocks the nozzle.

[0013] Optionally, the blocking member comprises a cutting plate and two rotating plates arranged at an angle, and the rotating plates rotate with the nozzle via a rotating portion;

[0014] The cutting plate and the two rotating plates enclose a blocking groove, and the pushing member is connected to the cutting plate and / or the rotating plate;

[0015] Wherein, the driving mechanism drives the pushing member to rotate through the rotating part and the nozzle, so that the cutting plate blocks the nozzle.

[0016] Optionally, two pushing members are provided, and the two pushing members are respectively provided on the outer edges of the same side of the two rotating plates;

[0017] The driving mechanism is provided with two push parts, and the two push parts are respectively connected to the two pushing members.

[0018] Optionally, the driving mechanism comprises:

[0019] Actuators; and

[0020] A driving rod, one end of which is connected to the driving member, and the other end of which is connected to the blocking mechanism. The driving member drives the driving rod to push the blocking mechanism to rotate relative to the nozzle to open or block the nozzle.

[0021] Optionally, the blocking mechanism is provided with a strip-shaped hole;

[0022] An end of the driving rod away from the driving member is provided with a push portion, the push portion is penetrated in the strip hole, and the push portion reciprocates in the strip hole under the driving force of the driving member.

[0023] Optionally, the driving mechanism further comprises a mounting member, one end of which is connected to the driving member, and the other end of which is used to connect to an external member.

[0024] Optionally, the driving mechanism further comprises a guide member, the guide member is provided on the extruder and is located between the nozzle and the driving member, and the guide member is provided with a guide hole;

[0025] The driving rod is movably arranged in the guide hole.

[0026] Optionally, the driving member is configured as a linear cylinder;

[0027] And / or, the moving direction of the driving rod is arranged perpendicular to the rotation axis of the blocking mechanism around the nozzle.

[0028] The utility model also proposes an extruder, comprising:

[0029] a body provided with a nozzle; and

[0030] As described above, the driving mechanism of the blocking device is detachably connected to the body, and the blocking mechanism of the blocking device is detachably rotatably connected to the nozzle.

[0031] The plugging device of the technical solution of the utility model is used to plug or open the nozzle of the extruder. The plugging device includes a plugging mechanism and a driving mechanism. The plugging mechanism is located on the outside of the nozzle, which is easy to install and can prevent the plugging mechanism from being heated, thereby preventing deformation of each mechanism and the occurrence of material leakage. The plugging mechanism is rotatably connected to the nozzle, and the driving mechanism is connected to the plugging mechanism. The plugging device drives the plugging mechanism to rotate relative to the nozzle through the driving mechanism to achieve cutting of the tail material of the nozzle, opening or plugging of the nozzle. It has a simple structure and is easy to operate. It can be applied to any extruder whose nozzle needs to prevent material tailing, and has strong versatility. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0033] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the plugging device of the utility model;

[0034] Figure 2 It is a partial structural schematic diagram of an opening open state of an embodiment of the plugging device of the utility model;

[0035] Figure 3 It is a partial structural schematic diagram of the opening blocking state of one embodiment of the blocking device of the utility model.

[0036] Description of Figure Numbers:

[0037] Label name Label name Label name 100 Blocking device 30 Blocking mechanism 50 Driving mechanism 10 nozzle 31 Blocking parts 51 Drive parts 10A Opening 31A Blocking slot 53 Drive rod 33 Pusher 311 Cutting Board 55 Pushing part 33A Strip hole 313 Rotating plate 57 Mounting parts 59 Guide

[0038] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0039] 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 of 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.

[0040] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back...) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0041] In the present invention, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" 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 an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0042] In addition, in the present utility model, descriptions such as "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the meaning of "and / or" appearing in the full text is to include three parallel solutions. Taking "A and / or B as an example", it includes solution A, or solution B, or solutions that satisfy both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

[0043] At present, there is a problem of material tailing in the nozzle after the extruder stops. The existing method to solve the nozzle tailing is to modify the nozzle, that is, to provide a structure similar to a one-way valve inside the nozzle. When the machine starts working, the pressure inside the nozzle compresses the butterfly spring, the valve port opens, and the material flows out; when the machine stops working, the butterfly spring returns to its original state and the valve port closes.

[0044] The above-mentioned anti-tailing method has the defect of complex nozzle structure. The one-way valve structure is difficult to disassemble and assemble in a narrow space. The nozzle is continuously heated during operation, causing deformation of the internal valve structure, resulting in failure of valve port sealing and leakage.

[0045] The utility model provides a blocking device 100 which is applied to an extruder. The extruder is provided with a nozzle 10 .

[0046] Reference Figures 1 to 3 , Figure 1 This is a schematic diagram of the overall structure of an embodiment of a plugging device 100 of the utility model;

[0047] Figure 2 This is a partial structural diagram of an opening 10A of an embodiment of a plugging device 100 of the utility model in an open state;

[0048] Figure 3 It is a partial structural schematic diagram of the blocking state of the opening 10A of an embodiment of the blocking device 100 of the utility model.

[0049] In the embodiment of the utility model, the blocking device 100 includes a blocking mechanism 30 and a driving mechanism 50. Figures 1 to 3 As shown, the blocking mechanism 30 is rotatably arranged outside the nozzle 10. The driving mechanism 50 is arranged in the extruder, the driving mechanism 50 is connected to the blocking mechanism 30, and the driving mechanism 50 drives the blocking mechanism 30 to rotate relative to the nozzle 10 to open or block the nozzle 10.

[0050] The plugging device 100 of the technical solution of the utility model is used to plug or open the nozzle 10 of the extruder. The plugging device 100 includes a plugging mechanism 30 and a driving mechanism 50. The plugging mechanism 30 is located on the outside of the nozzle 10, which is easy to install and can prevent the plugging mechanism 30 from being heated, thereby preventing deformation of each mechanism and the occurrence of material leakage. The plugging mechanism 30 is rotatably connected to the nozzle 10, and the driving mechanism 50 is connected to the plugging mechanism 30. The plugging device 100 drives the plugging mechanism 30 to rotate relative to the nozzle 10 through the driving mechanism 50 to achieve the cutting of the tail material of the nozzle 10, the opening or plugging of the nozzle 10. It has a simple structure and is easy to operate. It can be applied to any extruder where the nozzle 10 needs to prevent material tailing, and has strong versatility.

[0051] It can be understood that the plugging device 100 of the present invention can be mainly used in the field of plastic extruders or concrete extruders, and its structural dimensions are matched with the dimensions of the plugging device 100 to be installed. Figure 1 The opening direction in the figure is the movement direction in which the driving mechanism 50 drives the blocking mechanism 30 to rotate to open the opening 10A of the nozzle 10. Figure 1 The closing direction is the movement direction in which the driving mechanism 50 drives the blocking mechanism 30 to rotate to block the opening 10A of the nozzle 10 .

[0052] Furthermore, the nozzle 10 has an opening 10A, and the blocking mechanism 30 is rotatably connected to the nozzle 10, so that the driving mechanism 50 drives the blocking mechanism 30 to scrape away the tailing material at the opening 10A of the nozzle 10 while rotating, thereby preventing the material from tailing at the opening 10A of the nozzle 10. After the driving operation is completed, the opening 10A of the nozzle 10 can be blocked, which has a simpler structure than setting a butterfly valve or other valve inside the opening 10A. It can not only scrape the material to prevent the tailing material, but also block the nozzle 10 to stop the discharge of the material. When the nozzle 10 is applied to an extruder, the blocking mechanism 30 and the driving mechanism 50 are both arranged outside the nozzle 10 and the extruder, which is easy to install, easy to operate, and not easily deformed by heat, thereby improving the stability of blocking and scraping.

[0053] Optionally, the blocking mechanism 30 includes a blocking member 31 and a pushing member 33, and the blocking member 31 is rotatably connected to the nozzle 10. The pushing member 33 is disposed on the blocking member 31, and the driving mechanism 50 is connected to the pushing member 33. The driving mechanism 50 drives the pushing member 33 to drive the blocking member 31 to rotate relative to the nozzle 10, so that the blocking member 31 opens or blocks the nozzle 10.

[0054] In this embodiment, the blocking member 31 of the blocking mechanism 30 is used to rotate and connect the nozzle 10, and the pushing member 33 of the blocking mechanism 30 is used to connect the driving mechanism 50. The blocking device 100 has a blocking state and an open state. In the blocking state, the driving mechanism 50 drives the pushing member 33 to move to drive the blocking member 31 to move, so that the blocking member 31 completes the operation of scraping the material and blocking the opening 10A of the nozzle 10 during the rotation process. When extrusion is required, the driving mechanism 50 drives the pushing member 33 in reverse to drive the blocking member 31 to rotate in the reverse direction, so that the opening 10A of the nozzle 10 is exposed, so that the blocking device 100 is in the open state.

[0055] Optionally, the blocking member 31 includes a cutting plate 311 and two rotating plates 313 arranged at an angle, and the rotating plate 313 rotates with the nozzle 10 through a rotating portion. The cutting plate 311 and the two rotating plates 313 enclose a blocking groove 31A, and the pusher 33 is connected to the cutting plate 311 and / or the rotating plate 313; wherein the driving mechanism 50 drives the pusher 33 to rotate with the nozzle 10 through the rotating portion, so that the cutting plate 311 blocks the nozzle 10.

[0056] In this embodiment, the cutting plate 311 and the two rotating plates 313 of the blocking member 31 form a U-shaped plate structure, which can be integrally formed or welded. The U-shaped plate forms a U-shaped blocking groove 31A, the rotating plate 313 forms the bottom wall of the blocking groove 31A, and the two rotating plates 313 form the two side walls of the blocking groove 31A.

[0057] The pushing member 33 can be directly connected to the cutting plate 311 or the rotating plate 313. The output action of the driving mechanism 50 finally acts on the pushing member 33. The positions of the pushing member 33 and the blocking member 31 are relatively fixed. Therefore, under the output of the driving mechanism 50, the cutting plate 311 and the two rotating plates 313 of the blocking member 31 can be driven to rotate synchronously through the pushing member 33, so that the cutting plate 311 can be used to scrape and block the opening 10A during the rotation process, thereby improving the convenience of operation.

[0058] It can be understood that the sealing mechanism 30 is rotatably connected to the nozzle 10 through the two mounting plates of the sealing member 31, specifically, the two rotating plates 313 are rotatably connected to the nozzle 10 at one end away from the cutting plate 311, and the rotation method can be rotation through a rotating shaft, rotation through a pin shaft, or hinged rotation through a hinge shaft.

[0059] Optionally, two pushing members 33 are provided, and the two pushing members 33 are respectively provided on the outer edges of the same side of the two rotating plates 313 ; the driving mechanism 50 is provided with two resisting portions 55 , and the two resisting portions 55 are respectively connected to the two pushing members 33 .

[0060] In this embodiment, a pushing member 33 is provided on one side of the two rotating plates 313 of the sealing member 31, that is, the sealing mechanism 30 is provided with two pushing members 33, and the driving output end of the driving mechanism 50 is provided with two pushing parts 55 to respectively connect the two pushing members 33. When connecting the two rotating plates 313, a double-point connection can be performed to synchronously push the rotating plates 313 to rotate, so as to improve the rotation synchronization of the two rotating plates 313 of the sealing member 31, avoid rotation tilt, and ensure the cleanliness of the scraping and the completeness of the sealing.

[0061] Optionally, the driving mechanism 50 includes a driving member 51 and a driving rod 53, one end of the driving rod 53 is connected to the driving member 51, and the other end is connected to the blocking mechanism 30, and the driving member 51 drives the driving rod 53 to push the blocking mechanism 30 to rotate relative to the nozzle 10 to open or block the nozzle 10.

[0062] In this embodiment, the driving member 51 is arranged on the outer wall of the extruder, and the output end of the driving member 51 is connected to the driving rod 53. The end of the driving rod 53 away from the driving member 51 is provided with one or two push parts 55. The number of the push parts 55 corresponds to the number of the pushing members 33. Preferably, two push parts 55 can be provided to connect the two pushing members 33. When pushing the output, the driving operation of the two pushing members 33 can be performed synchronously, thereby improving the smoothness, synchronization and reliability of the rotation of the blocking member 31. The pushing member 33 is pushed by the push part 55 to drive the mounting plate and the cutting plate 311 to rotate around the rotation center, so as to block the nozzle 10 through the cutting plate 311 of the blocking member 31. The opening process of the nozzle 10 is opposite to the blocking process, and the driving member 51 provides the power for opening or blocking.

[0063] Optionally, the driving member 51 can be set as a rotating motor, or a rotating cylinder, or it can be set as a linear cylinder. The output of the linear cylinder is linear motion. Therefore, it is necessary to set a motion margin at the connection position between the driving rod 53 and the pushing member 33 to convert the linear output motion into the rotational motion of the mounting plate.

[0064] Optionally, the blocking mechanism 30 is provided with a strip hole 33A, and the end of the driving rod 53 away from the driving member 51 is provided with a push portion 55, which is penetrated into the strip hole 33A and reciprocates in the strip hole 33A under the driving force of the driving member 51.

[0065] In this embodiment, the driving member 51 is configured as a linear motor, which is stable to install and occupies a small installation space. The driving member 51 is installed on the extruder, and its linear output direction is parallel to the discharge direction. Two push parts 55 are provided at the end of the driving rod 53, and the two push parts 55 are connected to the two pushing members 33 of the sealing mechanism 30.

[0066] A strip hole 33A is provided on each pushing member 33, and the setting direction of the strip hole 33A is set at a certain angle to the linear driving direction, so that the pushing member 33 and the pushing portion 55 have a movement margin. Therefore, when the driving member 51 outputs the drive, the pushing portion 55 moves in the strip hole 33A along the length extension direction of the strip hole 33A, thereby driving the mounting plate to rotate forward or reverse relative to the nozzle 10 through the pushing member 33, thereby opening or blocking the nozzle 10.

[0067] Optionally, the moving direction of the driving rod 53 is arranged perpendicular to the rotation axis of the blocking mechanism 30 around the nozzle 10 .

[0068] In this embodiment, the moving direction of the driving rod 53 is parallel to its length extension direction, and the line connecting the rotation connection points of the two mounting plates is the rotation axis of the sealing mechanism 30 around the nozzle 10. The moving direction of the driving rod 53 is arranged perpendicular to the rotation axis of the sealing mechanism 30 around the nozzle 10, so that the rotation connection positions of the two mounting plates and the nozzle 10 are respectively located on both sides of the driving rod 53, thereby improving the synchronization of the drive.

[0069] In one embodiment, since the diameter of the nozzle 10 is gradually reduced compared to the diameter of the extruder body, a conversion portion is correspondingly provided at the middle of the driving rod 53. The conversion portion is provided so that the two ends of the driving rod 53 can respectively adapt to the setting positions of the driving member 51 and the blocking member 31, and can offset the diameter difference caused by the reduction in the diameter of the nozzle 10, thereby improving the compactness of the structure in which the driving rod 53 is connected to the driving member 33, thereby improving the driving reliability.

[0070] Optionally, the driving mechanism 50 also includes a mounting member 57, one end of which is connected to the driving member 51, and the other end is used to connect to an external member, so that the driving member 51 is detachably connected to the extruder through the mounting member 57, and the mounting member 57 and the driving member 51 are also detachably connected, so that the mounting member 57 is replaceable to select an appropriate mounting member 57 for an extruder.

[0071] Optionally, the driving mechanism 50 further includes a guide member 59 , which is disposed in the extruder and located between the nozzle 10 and the driving member 51 , and the guide member 59 is provided with a guide hole; the driving rod 53 is movably inserted into the guide hole.

[0072] In this embodiment, the guide member 59 is arranged outside the extruder and on the extension path of the driving rod 53. The guide member 59 is provided with a guide hole; the driving rod 53 is movably inserted into the guide hole. The setting of the guide member 59 can not only guide and restrict the output direction of the driving rod 53, but also support the driving rod 53, improve the pushing strength of the end of the driving rod 53 away from the driving member 51, and improve the stability of the blocking member 31 blocking the opening 10A of the nozzle 10 or opening the opening 10A of the nozzle 10.

[0073] The utility model also proposes an extruder (not shown), which includes a body (not shown) and a plugging device 100. The specific structure of the plugging device 100 refers to the above embodiment. Since the extruder adopts all the technical solutions of all the above embodiments, it at least has all the beneficial effects brought by the technical solutions of the above embodiments, which will not be described one by one here. Among them, a nozzle 10 is provided on one side of the body, a driving mechanism 50 of the plugging device 100 is detachably connected to the body, and a plugging mechanism 30 of the plugging device 100 is detachably rotatably connected to the nozzle 10.

[0074] In this embodiment, the body is provided with a material cavity, the opening 10A of the nozzle 10 is provided at one end of the nozzle 10 away from the body, and the nozzle 10 is further provided with an extrusion channel connecting the material cavity and the opening 10A. The driving member 51 of the sealing device 100 drives the driving rod 53 to be movably connected with the pushing member 33 through the pushing portion 55 to push the sealing member 31 to rotate relative to the nozzle 10, and rotate to open or block the opening 10A of the nozzle 10, thereby blocking the discharge of the extrusion channel. The sealing device 100 has a simple structure, is easy to install, has a good sealing effect, can scrape the material to prevent tailing, has wide versatility, is easy to disassemble and assemble, and is suitable for universal promotion and use.

[0075] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the inventive concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A plugging device, applied to an extruder, wherein the extruder is provided with a nozzle, characterized in that: The blocking device comprises: A blocking mechanism rotatably disposed outside the nozzle; and A driving mechanism is provided on the extruder, the driving mechanism is connected to the blocking mechanism, and the driving mechanism drives the blocking mechanism to rotate relative to the nozzle to open or block the nozzle.

2. The blocking device according to claim 1, characterized in that: The blocking mechanism comprises: a blocking member rotatably connected to the nozzle; and A pushing member, the pushing member is arranged on the blocking member, and the driving mechanism is connected to the pushing member; Wherein, the driving mechanism drives the pushing member to drive the blocking member to rotate relative to the nozzle, so that the blocking member opens or blocks the nozzle.

3. The blocking device according to claim 2, characterized in that: The blocking member comprises a cutting plate and two rotating plates arranged at an angle, and the rotating plates rotate with the nozzle via a rotating part; The cutting plate and the two rotating plates enclose a blocking groove, and the pushing member is connected to the cutting plate and / or the rotating plate; Wherein, the driving mechanism drives the pushing member to rotate through the rotating part and the nozzle, so that the cutting plate blocks the nozzle.

4. The blocking device according to claim 3, characterized in that: There are two pushing members, and the two pushing members are respectively arranged on the outer edges of the same side of the two rotating plates; The driving mechanism is provided with two push parts, and the two push parts are respectively connected to the two pushing members.

5. The blocking device according to claim 1, characterized in that: The driving mechanism comprises: Actuators; and A driving rod, one end of which is connected to the driving member, and the other end of which is connected to the blocking mechanism. The driving member drives the driving rod to push the blocking mechanism to rotate relative to the nozzle to open or block the nozzle.

6. The blocking device according to claim 5, characterized in that: The blocking mechanism is provided with a strip-shaped hole; An end of the driving rod away from the driving member is provided with a push portion, the push portion is penetrated in the strip hole, and the push portion reciprocates in the strip hole under the driving force of the driving member.

7. The blocking device according to claim 5, characterized in that: The driving mechanism further comprises a mounting member, one end of which is connected to the driving member, and the other end of which is used to connect to an external member.

8. The blocking device according to claim 7, characterized in that: The driving mechanism further comprises a guide member, which is arranged on the extruder and located between the nozzle and the driving member, and the guide member is provided with a guide hole; The driving rod is movably arranged in the guide hole.

9. The blocking device according to claim 5, characterized in that: The driving member is configured as a linear cylinder; And / or, the moving direction of the driving rod is arranged perpendicularly to the rotation axis of the blocking mechanism around the nozzle.

10. An extruder, characterized in that: The extruder comprises: a body provided with a nozzle; and According to any one of claims 1 to 9, the driving mechanism of the blocking device is detachably connected to the body, and the blocking mechanism of the blocking device is detachably rotatably connected to the nozzle.

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