Exhaust nozzle

Abstract

The utility model relates to an exhaust nozzle, which is characterized in that an exhaust unit is arranged at the axis of a middle body, the exhaust unit comprises a sheath, plugs which are respectively arranged at the tail end and the top end of the sheath, and a plurality of exhaust components which are arranged in the sheath and are clamped between the two plugs, and each exhaust component is provided with a plurality of glue passing channels along the axial direction; the glue passing channels between every two adjacent exhaust assemblies are communicated with each other; a plurality of exhaust gaps are formed between every two adjacent exhaust assemblies, each exhaust gap is located in the side wall of the corresponding exhaust assembly, one end of each exhaust gap is communicated with the glue passing channel, the other end of each exhaust gap is communicated with a first exhaust channel arranged between the corresponding exhaust assembly and the sheath, and the first exhaust channels are indirectly communicated with exhaust holes formed in the middle body. According to the utility model, the exhaust drying effect is good, the glue passing amount is larger, the glue is more dispersedly distributed in the sheath, the gas in the glue is easier to escape from the interior of the glue, and the exhaust effect is better.

Description

Technical Field

[0001] The utility model relates to the technical field of injection molding, in particular to an exhaust nozzle. Background Art

[0002] Injection molding is an essential component of modern industry. It involves extruding and injecting melted plastic into a mold. During the melting process, air is mixed into the plastic colloid. Failure to expel this gas can compromise product quality. Existing technologies typically remove this gas by installing a gas-liquid separation valve on the housing corresponding to the screw's top. However, in actual operation, these valves have been found to be incapable of completely removing the gas, resulting in reduced product quality. Therefore, a component capable of removing this small amount of residual gas is needed in the art. Utility Model Content

[0003] The purpose of this utility model is to provide an exhaust nozzle in order to overcome the defects of the prior art.

[0004] In order to achieve the purpose of the present invention, the present application provides the following technical solutions.

[0005] In the first aspect, the present application provides that the exhaust nozzle includes a flange connector, a middle body and a sub-nozzle connected in sequence, and the axis of the flange connector, the middle body and the sub-nozzle is hollow and provided with a colloid flow channel, and the axis of the middle body is provided with an exhaust unit, and the exhaust unit includes a sleeve, plugs respectively installed at the tail end and the top end of the sleeve, and several exhaust components installed in the sleeve and clamped between the two plugs, each of the exhaust components is provided with a plurality of glue passages along its axial direction, and the glue passages between two adjacent exhaust components are connected to each other; and there are several exhaust gaps between two adjacent exhaust components, each of the exhaust gaps is located on the side wall of the exhaust component, and one end of the exhaust gap is connected to the glue passage, and the other end is connected to the first exhaust channel arranged between the exhaust component and the sleeve, the exhaust gap can allow gas to pass through but isolate the molten colloid; a second exhaust channel is provided between the sleeve and the middle body, the first exhaust channel and the second exhaust channel are connected, and the side wall of the middle body is provided with an exhaust hole, and the exhaust hole is connected to the second exhaust channel. Compared to conventional nozzles, this application utilizes a rational exhaust channel within the nozzle body, allowing internal gas to be discharged through interconnected exhaust slits, exhaust channels, and exhaust holes to the exterior of the nozzle body. This allows for smooth gas discharge, thereby reducing the gas content within the plastic, improving product quality, and saving investment in drying equipment. Furthermore, compared to similar products previously developed by the applicant, the exhaust assembly of this application incorporates multiple glue-passing channels, which, on the one hand, allows for a greater glue-passing capacity; on the other hand, the colloid is more dispersed, allowing gas trapped within the colloid to escape more easily, resulting in a more effective exhaust.

[0006] In one embodiment of the first aspect, the exhaust assembly includes a first ring piece and a second ring piece, the first ring piece and the second ring piece being arranged in sequence, the first ring piece having exhaust slits on both sides, and the second ring piece having smooth and flat sides. The number of the first ring piece and the second ring piece can be 1 to 50.

[0007] In one embodiment of the first aspect, all exhaust assemblies have the same structure, and one side of each exhaust assembly is provided with an exhaust slit, and the other side is smooth and flat, and all the exhaust assemblies are arranged in the same manner.

[0008] In one embodiment of the first aspect, all of the exhaust assemblies have the same structure, and exhaust slits are provided on both sides of the exhaust assemblies. All of the exhaust assemblies are arranged in the same order. Preferably, the exhaust slits are arranged from the outer diameter to the inner diameter (toward the axis) of the exhaust plate (or the first annular plate), and the number of exhaust slits is 1 to 20, more preferably 4 to 10.

[0009] Of course, in addition to the three above-mentioned exhaust gap setting methods, other similar setting methods are also possible, such as evenly opening exhaust gaps on both sides of all exhaust plates, as long as there are corresponding exhaust channels corresponding to the exhaust gaps, and the depth of the exhaust gaps can isolate the colloid from passing through.

[0010] In one embodiment of the first aspect, the exhaust assembly abutting the plug has a protrusion on its side facing the plug, and the protrusion is located between two adjacent glue passages. The purpose of providing the protrusion is to break the colloid and quickly divert the colloid into each glue passage.

[0011] In one embodiment of the first aspect, the venting gap has a depth of 0.001 to 0.3 mm. This depth can be determined based on factors such as the viscosity of the colloid and the colloid flow rate of the nozzle. For higher colloid viscosity, the venting gap depth can be larger. For higher flow rates in the injection molding machine and higher pressures within the nozzle, the venting gap depth should be smaller. In short, the venting gap depth should ensure that gas can pass through but that the colloid cannot enter.

[0012] In one embodiment of the first aspect, the plug includes an outer sealing portion and an inner sealing portion arranged coaxially, the diameter of the outer sealing portion is larger than the diameter of the inner sealing portion, the outside of the inner sealing portion is provided with a first external thread, the inner walls at both ends of the sleeve are provided with a first internal thread matching the first external thread, and a third exhaust channel along the axial direction is opened at the engagement of the first external thread and the first internal thread, the first exhaust channel is connected to the third exhaust channel, and the third exhaust channel is connected to the second exhaust channel.

[0013] In one embodiment of the first aspect, mounting grooves are provided at the axis centers of the front and rear ends of the middle body, the tail end of the sub-nozzle is installed in the mounting groove at the front end of the middle body, and a fourth exhaust channel is left between the tail end of the sub-nozzle and the bottom of the mounting groove; the top end of the flange connector is installed in the mounting groove at the tail end of the middle body, and a fifth exhaust channel is left between the tail end of the flange connector and the bottom of the mounting groove.

[0014] In one embodiment of the first aspect, a second external thread is provided on the outside of the tail end of the sub-nozzle, a second internal thread matching the second external thread is provided on the inner wall of the front end mounting groove of the middle body, and a first groove is provided at the axis center of the tail end of the sub-nozzle, the bottom of the first groove abuts against the top of the outer sealing portion of the front end plug, and the inner diameter of the first groove is larger than the outer diameter of the outer sealing portion.

[0015] In one embodiment of the first aspect, a first colloid channel is provided at the axis center of the front end plug, the front end of the first colloid channel is connected to the colloid flow channel in the sub-nozzle, the rear end of the first colloid channel is in contact with the front end exhaust component, and is connected to all the glue passages of the front end exhaust component.

[0016] In one embodiment of the first aspect, a third external thread is provided on the outside of the front end of the flange connection body, a third internal thread matching the third external thread is provided on the inner wall of the mounting groove at the tail end of the middle body, and a second groove is provided at the axis center of the top end of the flange connection body, the bottom of the second groove abuts against the top of the outer sealing portion of the rear end plug, and the inner diameter of the second groove is larger than the outer diameter of the outer sealing portion.

[0017] In one embodiment of the first aspect, a second colloid channel is provided at the axis center of the rear end plug, the tail end of the second colloid channel is connected to the colloid flow channel in the flange connector, the top end of the second colloid channel is in contact with the exhaust component at the rear end, and is connected to all the glue passages of the exhaust component at the rear end.

[0018] In one embodiment of the first aspect, all the exhaust components are provided with N evenly distributed fine-reamed holes. During installation, N locating pins pass through the fine-reamed holes on each exhaust component, where N is ≥ 2. The fine-reamed holes and locating pins are provided to ensure that all the glue passages are interconnected.

[0019] Compared with the prior art, the beneficial effects of the present invention are:

[0020] (1) By setting a reasonable exhaust channel in the nozzle body, the gas inside it can be discharged to the outside of the nozzle body through the connected exhaust gap, the first exhaust channel, the second exhaust channel, the third or fourth exhaust channel, the fifth exhaust channel, and the exhaust hole in sequence, thereby smoothly exhausting the gas, thereby reducing the gas content in the plastic, improving product quality, and saving investment in drying equipment;

[0021] (2) It has a larger amount of glue, and the distribution of the colloid in the sheath is more dispersed, the gas inside the colloid is easier to escape from the inside of the colloid, and the exhaust effect is better. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic diagram of the overall assembly of the exhaust nozzle in Example 1;

[0023] Figure 2 Schematic diagram of the three-dimensional structure of the stopper in Example 1;

[0024] Figure 3 for Figure 2 Side view of;

[0025] Figure 4 This is a schematic diagram of the main structure of the partition piece in Example 1;

[0026] Figure 5 for Figure 4 A side structural diagram of

[0027] Figure 6 This is a schematic diagram of the main structure of the exhaust plate in Example 1;

[0028] Figure 7 for Figure 6 A side structural diagram of

[0029] Figure 8 is a schematic diagram of the structure of the sheath;

[0030] Figure 9 This is a schematic diagram of the main structure of the plug;

[0031] Figure 10 Schematic diagram of the side structure of the plug;

[0032] Figure 11 Schematic diagram of the structure of the midbody;

[0033] Figure 12 It is a structural diagram of the flange connection body;

[0034] Figure 13 Schematic diagram of the structure of the sub-nozzle.

[0035] In the accompanying drawings, 1 is a flange connector, 2 is a middle body, 3 is a sub-nozzle, 4 is a heating ring, 5 is a plug, 6 is a fourth exhaust channel, 7 is a sheath, 8 is an exhaust assembly, 9 is a glue channel, 10 is a fine reaming hole, 11 is a first exhaust channel, 12 is a protrusion, 13 is a stopper, 14 is a partition plate, 15 is an exhaust plate, 16 is an exhaust gap, 17 is a first mounting groove, 18 is a third exhaust channel, 19 is a first external thread, 20 is a first glue cavity, 21 is a second glue cavity, 22 is a third glue cavity, 23 is an exhaust hole, 24 is a second mounting groove, 25 is a third internal thread, 26 is a third external thread, 27 is a second groove, 28 is a second external thread, 29 is a first groove, 30 is a fifth exhaust channel, 31 is an inner sealing portion, 32 is an outer sealing portion, 33 is a first internal thread, 34 is a second internal thread, and 35 is a second exhaust channel. DETAILED DESCRIPTION

[0036] Unless otherwise defined, technical or scientific terms used in this specification and claims shall have the ordinary meanings understood by persons having ordinary skill in the art to which this invention belongs. All numerical values ​​listed herein, from the lowest value to the highest value, refer to all numerical values ​​obtained by incrementing the lowest value to the highest value by one unit when the difference between the lowest value and the highest value is two units or more.

[0037] The following describes specific embodiments of the present invention. It should be noted that, in the context of describing these embodiments, for the sake of brevity and clarity, this specification does not exhaustively describe all features of the actual embodiments. Those skilled in the art may modify and replace the embodiments of the present invention without departing from the spirit and scope of the present invention, and the resulting embodiments are also within the scope of protection of the present invention.

[0038] Example

[0039] The following is a detailed description of an embodiment of the present invention. This embodiment is implemented based on the technical solution of the present invention, and provides a detailed implementation method and specific operation process. However, the protection scope of the present invention is not limited to the following embodiment.

[0040] Example 1

[0041] An exhaust nozzle, the overall structure of which is as follows Figure 1 As shown, it includes a flange connector 1, a middle body 2, a nozzle 3, a heating coil 4 located outside the middle body 2, and an exhaust unit located at the axis of the middle body 2. The exhaust unit is composed of a sheath 7, a plug 5, and an exhaust assembly 8. In this embodiment, the exhaust assembly 8 is composed of three types: a stopper 13, a partition plate 14, and an exhaust plate 15. The specific structure of each component is as follows:

[0042] The structure of stopper 13 is as follows Figure 2 、 Figure 3 As shown, the stopper 13 is a two-piece exhaust assembly 8 located at the front and rear ends of the entire exhaust unit. Seven glue passages 9 (including one in the center and six on the periphery) are provided inside the stopper 13. One side of the stopper 13 is smooth (the side pointing to the inside of the sheath 7), and the other side is provided with multiple protrusions 12. These protrusions 12 are located between two adjacent glue passages 9. The function of the protrusions 12 is to break the colloid so that the colloid can flow smoothly into each glue passage 9. Two symmetrical fine-reamed holes 10 are provided on the stopper 13, and a symmetrical first exhaust passage 11 is also provided on its outer side.

[0043] The structure of the exhaust plate 15 is as follows Figure 6 、 Figure 7 As shown, the exhaust plate 15 is also internally provided with seven gluing channels 9, two symmetrical fine-reaming holes 10, and a symmetrical first exhaust channel 11 on its outer side. The gluing channels 9, fine-reaming holes 10, and first exhaust channels 11 on the exhaust plate 15 are all connected to the corresponding structures on the stopper 13. Six exhaust slits 16 are ground into the sides of the exhaust plate 15 using a grinding wheel. The depth of the exhaust slits 16 ranges from 0.001 to 0.3 mm.

[0044] The structure of the partition sheet 14 is as follows Figure 4 、 Figure 5 As shown, the partition piece 14 is also provided with the same gluing channel 9, fine reaming hole 10, and first exhaust channel 11. The surfaces on both sides of the partition piece 14 are smooth. During installation, the exhaust components 8 are arranged in the following order: stopper 13, exhaust piece 15, partition piece 14, exhaust piece 15, partition piece 14...partition piece 14, exhaust piece 15, partition piece 14, exhaust piece 15, stopper 13. All exhaust components 8 are positioned and assembled using locating pins. The locating pins match the fine reaming holes 10 and are arranged closely in sequence. All gluing channels 9 are connected, and all first exhaust channels 11 are also connected.

[0045] In addition to the exhaust plate and partition plate structures in this embodiment, other forms of structures can also be used. For example, all exhaust components have the same structure, with an exhaust gap opened on one side and a smooth and flat side. They are then stacked in sequence, that is, in two adjacent exhaust components 8, the side with the exhaust gap is in contact with the smooth and flat side.

[0046] For example, all exhaust assemblies have the same structure, with one side having an exhaust slit and the other side being smooth and flat, and then stacked one on top of the other. However, the exhaust slits of two adjacent exhaust assemblies abut each other, and the smooth and flat sides of two adjacent exhaust assemblies also abut each other. Similar combinations are possible and will not be detailed here.

[0047] The structure of the sheath 7 is as follows Figure 8 As shown, the sleeve 7 has first mounting grooves 17 at both ends, and the inner wall of the first mounting grooves 17 is provided with first internal threads 33. The outer wall of the sleeve 7 defines a second exhaust passage 35, which ultimately connects to the exhaust hole 23 in the middle body 2. The inner diameter of the middle portion of the sleeve 7 is the same as the outer diameter of all exhaust components 8.

[0048] The structure of the plug 5 is as follows Figure 9 、 Figure 10 As shown, the plug 5 includes an outer sealing portion 32 and an inner sealing portion 31 arranged coaxially. The diameter of the outer sealing portion 32 is larger than the diameter of the inner sealing portion 31. The outer portion of the inner sealing portion 31 is provided with a first external thread 19. The first external thread 19 matches the first internal thread 33 in the sleeve 7. The first internal thread 33 and the first external thread 19 fix the plug 5 in the first mounting groove 17 of the sleeve 7. The first external thread 19 of the plug 5 defines a third exhaust channel 18 along the axial direction, and the first exhaust channel 11 and the third exhaust channel 18 are connected. The plug 5 is provided with a first glue passage cavity 20, a second glue passage cavity 21, and a third glue passage cavity 22 at its axis. For the plug 5 located at the rear end of the sheath 7, the first glue passage cavity 20, the second glue passage cavity 21, and the third glue passage cavity 22 are arranged sequentially from the rear end to the front end, while for the plug 5 located at the front end of the sheath 7, the first glue passage cavity 20, the second glue passage cavity 21, and the third glue passage cavity 22 are arranged sequentially from the front end to the rear end. The front ends of the two plugs 5 are respectively in contact with the stopper 13, and the protrusion 12 in the stopper 13 extends into the third cavity, that is, the front and rear plugs 5 clamp and fix all the exhaust components 8 in the sheath 7. The third cavity of the plug 5 located at the rear end of the sheath 7 is connected to the colloid flow channel of the flange connector 1, and the third cavity of the plug 5 located at the front end of the sheath 7 is connected to the colloid flow channel of the sub-nozzle 3.

[0049] The structure of midbody 2 is as follows Figure 11 As shown, a second mounting groove 24 is provided at the front axis of the middle body 2, and a second internal thread 34 is provided on the inner wall of the second mounting groove 24. The tail end of the sub-nozzle 3 is installed in the second mounting groove 24 at the front end of the middle body 2, and a fourth exhaust channel 6 is left between the tail end of the sub-nozzle 3 and the bottom of the second mounting groove 24. The fourth exhaust channel 6 is connected to the second exhaust channel 35. A second mounting groove 24 is also provided at the rear axis of the middle body 2, and a third internal thread 25 is provided on the inner wall of the second mounting groove 24. The top end of the flange connector 1 is installed in the second mounting groove 24 at the rear end of the middle body 2, and a fifth exhaust channel 30 is left between the tail end of the flange connector 1 and the bottom of the second mounting groove 24. The fifth exhaust channel 30 is connected to the second exhaust channel 35.

[0050] The structure of flange connector 1 is as follows Figure 12As shown, a third external thread 26 is provided on the outside of the front end of the flange connector 1, and the third external thread 26 matches the third internal thread 25. A second groove 27 is provided at the axis center of the top end of the flange connector 1, and the bottom of the second groove 27 abuts against the top of the outer sealing portion 32 of the rear end plug 5.

[0051] The structure of the sub-nozzle 3 is as follows Figure 13 As shown, the tail end of the sub-nozzle 3 is provided with a second external thread 28, which mates with a second internal thread 34. A first groove 29 is provided at the axis of the tail end of the sub-nozzle 3. The bottom of the first groove 29 abuts the top of the outer sealant portion 32 of the front end plug 5. The inner diameter of the first groove 29 is larger than the outer diameter of the outer sealant portion 32. Thus, the entire exhaust unit is clamped and fixed within the middle body 2 through the sub-nozzle 3 and the flange connector 1.

[0052] The working principle of the above exhaust nozzle is as follows:

[0053] The molten colloid (in this case, a gas-liquid mixture) flows from the colloid flow channel of the flange connector 1 and sequentially enters the first colloid passage cavity 20, the second colloid passage cavity 21, and the third colloid passage cavity 22 of the plug 5 at the tail end. Then, under the action of the protrusion 12 of the stopper 13, it is divided into seven parts and respectively enters the colloid passage 9 of the exhaust assembly 8. Due to the presence of the exhaust gap 16, the gas in the gas-liquid mixture enters the first exhaust channel 11 through the exhaust gap 16, and then enters the third exhaust channel 18. Since the front and rear ends of the third exhaust channel 18 are respectively connected to the fourth exhaust channel 6 and the fifth exhaust channel 30, and the fourth exhaust channel 6 and the fifth exhaust channel 30 are both connected to the second exhaust channel 35, and the second exhaust channel 35 is connected to the exhaust hole 23, the gas can eventually be discharged from the exhaust hole 23. The liquid is isolated by the exhaust gap 16 and can only continue to flow forward. After passing through the front end stopper 13, it enters the third glue cavity 22, the second glue cavity 21 and the first glue cavity 20 of the front end plug 5 in sequence, enters the glue flow channel of the sub-nozzle 3, and is finally ejected from the injection port of the sub-nozzle 3 for injection molding.

[0054] The above description of the embodiments is intended to facilitate understanding and application of the present application by those skilled in the art. It will be apparent that those skilled in the art can readily make various modifications to these embodiments and apply the general principles described herein to other embodiments without expending any creative effort. Therefore, the present application is not limited to the embodiments described herein, and improvements and modifications made by those skilled in the art based on the disclosure of this application without departing from the scope and spirit of this application are within the scope of this application.

Claims

1. An exhaust nozzle, comprising a flange connector, a middle body, and a sub-nozzle connected in sequence, wherein the flange connector, the middle body, and the sub-nozzle are hollow at their axes and provided with a colloid flow channel, characterized in that: An exhaust unit is provided at the axis of the middle body, and the exhaust unit includes a sleeve, plugs respectively installed at the tail end and the top end of the sleeve, and a plurality of exhaust components installed in the sleeve and clamped between the two plugs. Each of the exhaust components is provided with a plurality of glue-passing channels along its axial direction, and the glue-passing channels between two adjacent exhaust components are connected to each other; and a plurality of exhaust gaps are provided between two adjacent exhaust components, each of the exhaust gaps is located on the side wall of the exhaust component, and one end of the exhaust gap is connected to the glue-passing channel, and the other end is connected to the first exhaust channel provided between the exhaust component and the sleeve, and the exhaust gap can allow gas to pass through but isolate the molten colloid; a second exhaust channel is provided between the sleeve and the middle body, and the first exhaust channel and the second exhaust channel are connected, and an exhaust hole is provided on the side wall of the middle body, and the exhaust hole is connected to the second exhaust channel.

2. The exhaust nozzle according to claim 1, characterized in that The exhaust assembly includes a first ring piece and a second ring piece, which are arranged in sequence. Exhaust gaps are provided on two sides of the first ring piece, and two sides of the second ring piece are smooth and flat.

3. The exhaust nozzle according to claim 1, characterized in that All exhaust components have the same structure, and one side of each exhaust component is provided with an exhaust gap, and the other side is smooth and flat, and all the exhaust components are arranged in sequence in the same manner.

4. The exhaust nozzle according to claim 1, wherein: All of the exhaust components have the same structure, and exhaust gaps are provided on both sides of the exhaust components. All of the exhaust components are arranged in sequence in the same manner.

5. The exhaust nozzle according to any one of claims 2 to 4, characterized in that: The exhaust component abutting against the plug is provided with a protrusion on the side facing the plug, and the protrusion is located between two adjacent glue-passing channels.

6. The exhaust nozzle according to any one of claims 1 to 4, characterized in that: The depth of the exhaust gap is 0.001-0.3 mm.

7. The exhaust nozzle according to claim 1, wherein: The plug includes an outer sealing portion and an inner sealing portion arranged coaxially, the diameter of the outer sealing portion is larger than the diameter of the inner sealing portion, the outer side of the inner sealing portion is provided with a first outer thread, the inner walls at both ends of the sheath are provided with a first inner thread matching the first outer thread, and a third exhaust channel is opened along the axial direction on the outer side of the plug, and the first exhaust channel and the third exhaust channel are connected.

8. The exhaust nozzle according to claim 7, characterized in that Mounting grooves are provided at the axis centers of the front and rear ends of the middle body, the tail end of the sub-nozzle is installed in the mounting groove at the front end of the middle body, and a fourth exhaust channel is left between the tail end of the sub-nozzle and the bottom of the mounting groove; the top end of the flange connector is installed in the mounting groove at the tail end of the middle body, and a fifth exhaust channel is left between the tail end of the flange connector and the bottom of the mounting groove, the fourth exhaust channel and the fifth exhaust channel are respectively connected to the third exhaust channel on the two plugs, and the fourth exhaust channel and the fifth exhaust channel are both connected to the second exhaust channel between the sleeve and the middle body.

9. The exhaust nozzle according to claim 8, characterized in that A second external thread is provided on the outside of the tail end of the sub-nozzle, a second internal thread matching the second external thread is provided on the inner wall of the front end mounting groove of the middle body, and a first groove is provided at the axis center of the tail end of the sub-nozzle, the bottom of the first groove abuts against the top of the outer sealing portion of the front end plug, and the inner diameter of the first groove is larger than the outer diameter of the outer sealing portion; A first colloid channel is provided at the axis center of the plug at the front end, the front end of the first colloid channel is connected to the colloid flow channel in the sub-nozzle, and the rear end of the first colloid channel is in contact with the front end exhaust component and connected to all the glue passing channels of the front end exhaust component.

10. The exhaust nozzle according to claim 8, characterized in that The front end of the flange connection body is provided with a third external thread, the inner wall of the mounting groove at the rear end of the middle body is provided with a third internal thread matching the third external thread, and a second groove is provided at the axis center of the top end of the flange connection body, the bottom of the second groove abuts against the top of the outer sealing portion of the rear end plug, and the inner diameter of the second groove is larger than the outer diameter of the outer sealing portion; A second colloid channel is provided at the axis center of the plug located at the rear end, the tail end of the second colloid channel is connected to the colloid flow channel in the flange connector, the top end of the second colloid channel abuts against the exhaust component at the rear end, and is connected to all the glue passages of the exhaust component at the rear end.

11. The exhaust nozzle according to claim 1, wherein: All the exhaust components are provided with N evenly distributed fine-reamed holes. During installation, N positioning pins pass through the fine-reamed holes on each exhaust component, where N is greater than or equal to 2.

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