Exhaust nozzle

Abstract

The utility model relates to an exhaust nozzle which sequentially comprises a sub-nozzle, a middle body and a flange connecting body, the axis of the sub-nozzle, the axis of the middle body and the axis of the flange connecting body are hollow and are provided with colloid flowing channels, an exhaust unit is coaxially arranged at the axis of the middle body, and the exhaust unit comprises a sheath, an exhaust assembly arranged in the sheath and two plugs. The two plugs are fixed to the two ends of the protective sleeve respectively, the exhaust assembly is clamped between the two plugs, at least one exhaust gap is formed in the exhaust assembly, gas can pass through the exhaust gap but isolated from the molten colloid, exhaust channels which are sequentially communicated are arranged between the exhaust assembly and the protective sleeve and between the protective sleeve and the middle body, and the exhaust channels are communicated with the middle body. The exhaust gap is communicated with the exhaust channel, and an exhaust hole is formed in the side wall of the middle body and communicated with the exhaust channel. According to the utility model, the reasonable exhaust channel is arranged in the nozzle middle body, so that gas in the nozzle middle body can be smoothly exhausted, the gas content in plastic is reduced, the product quality is improved, and meanwhile, the investment of drying equipment can be saved.

Description

Technical Field

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

[0002] During the injection molding process of plastic products, there may be some gas in the raw materials. When the plastic products are injected, the gas in the plastic cannot be discharged smoothly, resulting in reduced product quality. Although there is technology showing that a gas-liquid separation device such as a gas-liquid separation valve is set on the casing corresponding to the top position of the screw to achieve the purpose of removing gas, it is found in actual operation that the above-mentioned gas-liquid separation valve can only remove most of the gas, but cannot discharge all of the gas, that is, some gas will still be injected from the nozzle with the melt and mixed in the final product, resulting in reduced product quality.

[0003] Therefore, there is an urgent need for a more effective gas exhaust component in the art. Summary of the invention

[0004] The purpose of the utility model is to overcome the defects of the prior art and provide an exhaust nozzle with exhaust effect.

[0005] In order to achieve the purpose of the utility model, the present application provides the following technical solutions.

[0006] In the first aspect, the present application provides an exhaust nozzle, which comprises a sub-nozzle, a middle body and a flange connecting body in sequence, wherein the sub-nozzle, the middle body and the flange connecting body are hollow at their axes and are provided with a colloid flow channel, an exhaust unit is coaxially arranged at the axis of the middle body, the exhaust unit comprises a sleeve, an exhaust component arranged inside the sleeve and two plugs, the two plugs are respectively fixed to the two ends of the sleeve and the exhaust component is clamped between the two plugs, at least one exhaust gap is provided in the exhaust component, the exhaust gap can allow gas to pass through but isolate the molten colloid, exhaust channels that are connected in sequence are provided between the exhaust component and the sleeve, and between the sleeve and the middle body, the exhaust gap is connected to the exhaust channel, and the side wall of the middle body is provided with an exhaust hole, and the exhaust hole is connected to the exhaust channel.

[0007] In one embodiment of the first aspect, the exhaust assembly includes a plurality of exhaust sheets, all of which are coaxially arranged with the sleeve, and the outer diameter of the exhaust sheet matches the inner diameter of the sleeve, two adjacent exhaust sheets are tightly attached and at least one exhaust gap is provided on the contact surface of the two, and the exhaust sheets at both ends are in contact with the plug.

[0008] In one implementation of the first aspect, the exhaust plate includes a first ring plate and a second ring plate, the first ring plate and the second ring plate are arranged in sequence, exhaust gaps are formed on two sides of the first ring plate, and two sides of the second ring plate are smooth and flat.

[0009] In an implementation manner of the first aspect, an exhaust gap is provided on the front side of the exhaust fin, and a back side of the exhaust fin is smooth and flat, and all the exhaust fins are arranged in sequence in the same manner.

[0010] In one embodiment of the first aspect, an exhaust gap is provided on one side of the exhaust sheet, and the other side of the exhaust sheet is smooth and flat. During installation, the side of one exhaust sheet with the exhaust gap abuts against the side of its adjacent exhaust sheet with the exhaust gap, and the smooth and flat side of the exhaust sheet abuts against the smooth and flat side of another adjacent exhaust sheet.

[0011] In an implementation of the first aspect, a depth of the exhaust gap is 0.001 to 0.3 mm.

[0012] In an implementation of the first aspect, a plurality of first exhaust channels are provided on the outer periphery of the exhaust plate along its axial direction, and each of the first exhaust channels matches an outer end of the exhaust slit.

[0013] In one embodiment of the first aspect, the plug is hollow at the axis center and is T-shaped, including a coaxially arranged outer sealing portion and an inner sealing portion, 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, a second exhaust channel along the axial direction is opened at the engagement point of the first outer thread and the first inner thread, and the first exhaust channel and the second exhaust channel are connected.

[0014] In one embodiment of the first aspect, mounting grooves are provided at the axial 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 third 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 fourth exhaust channel is left between the tail end of the flange connector and the bottom of the mounting groove.

[0015] 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 of the tail end of the sub-nozzle, the bottom of the first groove abuts against the top of the external sealing portion of the front end plug, and the inner diameter of the first groove is larger than the outer diameter of the external sealing portion.

[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 external sealing rubber part of the tail end plug, and the inner diameter of the second groove is larger than the outer diameter of the external sealing rubber part.

[0017] In an implementation of the first aspect, a fifth exhaust channel distributed along the axial direction is provided between the middle body and the sheath, and the fifth exhaust channel is communicated with the exhaust hole.

[0018] In one implementation of the first aspect, a heating ring is disposed outside the middle body.

[0019] Compared with the prior art, the beneficial effects of the utility model 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, so that the gas can be discharged smoothly, thereby reducing the gas content in the plastic, improving the product quality, and saving the investment in drying equipment.

[0021] (2) By setting the plug and the sleeve, the installation stability of the exhaust plate can be ensured, and the gas can only be discharged from the exhaust gap between the exhaust plates, avoiding the existence of other outlets, and the colloid is discharged from other outlets to block the equipment.

[0022] (3) By arranging a heating ring outside the middle body, the temperature of the colloid is ensured to prevent it from solidifying and clogging the exhaust nozzle. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a schematic diagram of the overall structure of the exhaust nozzle of this application;

[0024] Figure 2 It is a schematic diagram of the structure of the body in this application;

[0025] Figure 3 This is a schematic diagram of the structure of the sub-nozzle of this application;

[0026] Figure 4 This is a schematic diagram of the structure of the flange connection body of this application;

[0027] Figure 5 This is a schematic diagram of the structure of the sheath of this application;

[0028] Figure 6 This is a schematic diagram of the structure of the front end plug of this application;

[0029] Figure 7 This is a schematic diagram of the structure of the rear end plug of this application;

[0030] Figure 8 is a schematic diagram of the cross-sectional structure of the first ring piece in Example 1;

[0031] Fig. 9 is a schematic diagram of the front structure of the first ring piece;

[0032] Fig.10 is a schematic structural diagram of the second ring piece in Example 1;

[0033] Fig.11 is a schematic diagram of the front structure of the second ring piece;

[0034] Fig.12 It is a structural schematic diagram of the heating coil;

[0035] Fig.13 is a schematic diagram of the cross-sectional structure of two exhaust sheets placed together in Example 2;

[0036] Fig.14 A schematic diagram of the cross-sectional structure of the two exhaust sheets placed together in Example 3.

[0037] In the accompanying drawings, 1 is a sub-nozzle, 2 is a middle body, 3 is a flange connector, 4 is a plug, 5 is a sleeve, 6 is a first ring sheet, 7 is a second ring sheet, 8 is a heating ring, 9 is an exhaust gap, 10 is a first exhaust channel, 11 is a second exhaust channel, 12 is a third exhaust channel, 13 is a fourth exhaust channel, 14 is a fifth exhaust channel, 15 is an exhaust hole, 17 is a mounting groove, 18 is a first external thread, 19 is a second external thread, 20 is a third external thread, 21 is a first internal thread, 22 is a second internal thread, 23 is a third internal thread, 24 is a first groove, 25 is a second groove, 26 is an inner sealing portion, and 27 is an outer sealing portion. DETAILED DESCRIPTION

[0038] Unless otherwise defined, the technical or scientific terms used in this specification and claims shall have the ordinary meanings understood by persons having ordinary skills in the technical field to which the present invention belongs. All the values ​​from the lowest value to the highest value listed herein refer to all the values ​​obtained by incrementing one unit between the lowest value and the highest value when the difference between the lowest value and the highest value is more than two units.

[0039] The specific embodiments of the present invention will be described below in conjunction with the accompanying drawings. It should be noted that in the specific description of these embodiments, for the sake of concise description, this specification cannot provide a detailed description of all the features of the actual embodiments. Without departing from the spirit and scope of the present invention, those skilled in the art may modify and replace the embodiments of the present invention, and the resulting embodiments are also within the scope of protection of the present invention.

[0040] In a specific embodiment, the present application provides an exhaust nozzle, the nozzle includes a sub-nozzle, a middle body and a flange connection body in sequence, the axis of the sub-nozzle, the middle body and the flange connection body are hollow and provided with a colloid flow channel, the axis of the middle body is coaxially provided with an exhaust unit, the exhaust unit includes a sheath, an exhaust component arranged inside the sheath and two plugs, the two plugs are respectively fixed to the two ends of the sheath and the exhaust component is clamped between the two plugs, at least one exhaust gap is provided in the exhaust component, the exhaust gap allows gas to pass but isolates molten colloid, exhaust channels are provided between the exhaust component and the sheath, and between the sheath and the middle body, the exhaust gap is connected to the exhaust channel, and the side wall of the middle body is provided with an exhaust hole, which is connected to the exhaust channel. By setting a reasonable exhaust channel in the nozzle middle body, the gas inside it can be discharged to the outside of the nozzle middle body through the connected exhaust gap, exhaust channel and exhaust hole in sequence, and the gas is discharged smoothly, thereby reducing the gas content in the plastic, improving the product quality, and saving the investment in drying equipment. In addition, the present application can ensure the installation stability of the exhaust plate by setting the plug and the sleeve, and the gas can only be discharged from the exhaust gap between the exhaust plates, avoiding the existence of other air outlets, and the colloid is discharged from other air outlets to block the equipment.

[0041] In a specific embodiment, the exhaust assembly includes a plurality of exhaust sheets, all of which are coaxially arranged with the sheath, and the outer diameter of the exhaust sheet matches the inner diameter of the sheath, two adjacent exhaust sheets are tightly attached, and at least one exhaust gap is provided on the contact surface of the two, and the exhaust sheets at both ends are in contact with the plug. The axis of the exhaust sheet is hollow for the circulation of colloid. After the colloid mixed with gas enters, due to the existence of the exhaust gap, the gas can be discharged from the exhaust gap, and the colloid cannot enter the exhaust gap and can only continue to flow forward, thereby achieving gas-liquid separation.

[0042] A preferred exhaust gap setting method is as follows: the exhaust plate includes a first ring plate and a second ring plate, the first ring plate and the second ring plate are arranged in sequence, the exhaust gaps are provided on two sides of the first ring plate, and the two sides of the second ring plate are smooth and flat. The number of the first ring plate and the second ring plate can be set to 1 to 50.

[0043] The second preferred exhaust gap arrangement is as follows: the front of the exhaust sheet is provided with an exhaust gap, the back of the exhaust sheet is smooth and flat, and all the exhaust sheets are arranged in sequence in the same manner. 1 to 50 exhaust sheets can be arranged.

[0044] The third preferred exhaust gap setting method is as follows: an exhaust gap is provided on one side of the exhaust sheet, and the other side of the exhaust sheet is smooth and flat. During installation, the side of one exhaust sheet with the exhaust gap abuts against the side of its adjacent exhaust sheet with the exhaust gap, and the smooth and flat side of the exhaust sheet abuts against the smooth and flat side of another adjacent exhaust sheet.

[0045] Preferably, the exhaust gaps are arranged from the outer diameter to the inner diameter (towards the axis center) of the exhaust plate (or the first annular plate), and the number of the exhaust gaps is 1 to 20, and more preferably 4 to 10.

[0046] Of course, in addition to the above two exhaust gap setting methods, other similar settings 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.

[0047] In a specific embodiment, the depth of the exhaust gap is 0.001-0.3 mm. The depth can be comprehensively considered according to factors such as the viscosity of the colloid and the colloid flow rate of the nozzle. The greater the viscosity of the colloid, the greater the depth of the exhaust gap can be set. The greater the flow rate of the injection molding machine, the greater the pressure inside the nozzle, and the smaller the depth of the exhaust gap is required. In short, the depth of the exhaust gap must ensure that the gas can pass through, but the colloid cannot enter the exhaust gap.

[0048] In a specific embodiment, a plurality of first exhaust channels are provided on the outer periphery of the exhaust plate along its axial direction, and each of the first exhaust channels matches the outer end of the exhaust gap.

[0049] In a specific embodiment, the plug is hollow at the axis center and is T-shaped, including a coaxially arranged outer sealing portion and an inner sealing portion, 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, a second exhaust channel along the axial direction is opened at the engagement point of the first outer thread and the first inner thread, and the first exhaust channel and the second exhaust channel are connected.

[0050] In a specific embodiment, mounting grooves are provided at the axial 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 third 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 fourth exhaust channel is left between the tail end of the flange connector and the bottom of the mounting groove.

[0051] In a specific embodiment, 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 of the tail end of the sub-nozzle, the bottom of the first groove abuts against the top of the external sealing portion of the front end plug, and the inner diameter of the first groove is larger than the outer diameter of the external sealing portion.

[0052] In a specific embodiment, 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 external sealing rubber part of the tail end plug, and the inner diameter of the second groove is larger than the outer diameter of the external sealing rubber part.

[0053] In a specific embodiment, a fifth exhaust channel is provided between the middle body and the sheath and is distributed along the axial direction, and the fifth exhaust channel is connected to the exhaust hole. The fifth exhaust channel can be provided on the outer wall of the sheath, or on the inner wall of the middle body, or both the outer wall of the sheath and the inner wall of the middle body are provided with the fifth exhaust channel, and the function of the fifth exhaust channel is to connect the exhaust hole and the third or fourth exhaust channel.

[0054] In a specific embodiment, a heating ring is arranged outside the middle body to ensure the temperature of the colloid and prevent it from solidifying and blocking the exhaust nozzle.

[0055] In a specific embodiment, the exhaust nozzle is installed as follows:

[0056] (1) Install a plug at one end of the sheath to ensure that the second exhaust channel is unobstructed.

[0057] (2) Install the exhaust plates into the sheath one by one, ensuring that the first exhaust channels on all the exhaust plates are connected and are also connected with the second exhaust channels.

[0058] (3) Install another plug at the other end of the sheath and tighten it with a wrench to form an exhaust unit. Make sure that the two plugs tightly clamp all the exhaust plates in the middle and ensure that the second exhaust channel of the plug is unobstructed and connected to the first exhaust channel.

[0059] (4) Tighten the middle body and flange connection with a tap wrench.

[0060] (5) Install the assembled exhaust unit into the middle body, and then install the sub-nozzle at the front end of the middle body.

[0061] (6) Assemble the entire exhaust nozzle and connect it to the flange, and finally install the heating ring.

[0062] During the above installation process, pay attention to the following points: 1) The threads of each internal sealing part need to be coated with high-temperature anti-seizure oil; 2) The order of the exhaust plates cannot be wrong, and marks can be set on the exhaust plates to ensure the accurate placement of the exhaust plates, mainly to ensure that there are no other gaps for exhaust except the exhaust gaps set in the exhaust unit; 3) The middle body and the flange connector must be locked first and then the nozzle; 4) The exhaust holes on the middle body cannot be blocked.

[0063] Example

[0064] The following will describe in detail an embodiment of the present invention in conjunction with the accompanying drawings. This embodiment is implemented on the premise of the technical solution of the present invention, and provides a detailed implementation method and a specific operation process, but the protection scope of the present invention is not limited to the following embodiment.

[0065] Example 1

[0066] An exhaust nozzle, the structure of which is as follows Figure 1 As shown, it includes a sub-nozzle 1, a middle body 2, a flange connecting body 3, an exhaust unit and a heating ring 8. The exhaust unit includes a sheath 5, two plugs 4 and a plurality of exhaust plates. The exhaust plates are divided into a first ring plate 6 and a second ring plate 7. The specific structures of the above components are as follows.

[0067] The structure of midbody 2 is as follows Figure 2 As shown, the middle body 2 is hollow at its axis, and mounting grooves 17 are provided at the axis of both the front and rear ends of the middle body 2. A second internal thread 22 is provided on the inner wall of the mounting groove 17 at the front end, and a third internal thread 23 is provided on the inner wall of the mounting groove 17 at the rear end. Four exhaust holes 15 (only one is used as an example in the figure) are also provided on the side wall of the middle body 2, and the exhaust holes 15 connect the axis of the middle body 2 with the atmosphere.

[0068] The structure of the sub-nozzle 1 is as follows Figure 3 As shown, a second external thread 19 is provided on the outside of the tail end of the sub-nozzle 1, and the second external thread 19 matches the second internal thread 22. The tail end of the sub-nozzle 1 is installed in the mounting groove 17 at the front end of the middle body 2, and a third exhaust channel 12 is left between the tail end of the sub-nozzle 1 and the bottom of the mounting groove 17; a first groove 24 is provided at the axis of the tail end of the sub-nozzle 1.

[0069] The structure of the flange connection body 3 is as follows Figure 4As shown, a third external thread 20 is provided on the outside of the front end of the flange connector 3, the third external thread 20 matches the third internal thread 23, and a fourth exhaust channel 13 is left between the tail end of the flange connector 3 and the bottom of the mounting groove 17; a second groove 25 is provided at the axis of the top end of the flange connector 3.

[0070] The structure of the sheath 5 is as follows Figure 5 As shown, the axis of the sheath 5 is hollow, the inner walls at both ends of the sheath 5 are provided with first external threads 18, and the outer wall of the sheath 5 is provided with four fifth exhaust channels 14 along its axial direction. The outer wall of the rear end of the sheath 5 is 0.1 mm thinner than the outer wall of other parts of the sheath 5, that is, a gap 16 is left between the rear end of the sheath 5 and the inner wall of the middle body 2, and the four exhaust holes 15 are arranged at the positions corresponding to the gap 16. Therefore, the fourth exhaust channel 13 is directly connected to the gap 16 and then to the exhaust hole 15; and the third exhaust channel 12 is connected to the gap 16 through the fifth exhaust channel 14, and then to the exhaust hole 15.

[0071] The structure of the plug 4 is as follows Figure 6 , Figure 7 As shown, they are respectively installed at both ends of the sheath 5, and the structure is basically the same. The plug 4 is hollow at the axis and is T-shaped, including a coaxially arranged outer sealant portion 27 and an inner sealant portion 26. The diameter of the outer sealant portion 27 is larger than the diameter of the inner sealant portion 26. The outer portion of the inner sealant portion 26 is provided with a first outer thread 18, and the first outer thread 18 matches the first inner thread 21 in the sheath 5, and the first outer thread 18 and the first inner thread 21 are engaged at the second exhaust channel 11 along the axial direction. The bottom of the first groove 24 abuts against the top of the outer sealant portion 27 of the top end plug 4, and the inner diameter of the first groove 24 is greater than or equal to the outer diameter of the outer sealant portion 27. Similarly, the bottom of the second groove 25 abuts against the top of the outer sealant portion 27 of the tail end plug 4, and the inner diameter of the second groove 25 is greater than or equal to the outer diameter of the outer sealant portion 27.

[0072] The structure of the first ring piece 6 is as follows Figure 8 , Fig. 9 As shown, the structure of the second ring piece 7 is as follows Fig.10 , Fig.11As shown, in this embodiment, the first ring piece 6 and the second ring piece 7 are arranged in sequence, and exhaust gaps 9 are provided on the two sides of the first ring piece 6, and the two sides of the second ring piece 7 are smooth and flat, and the depth of the exhaust gap 9 is 0.01mm. Four first exhaust channels 10 are provided on the outer periphery of the first ring piece 6 and the second ring piece 7, and when installed, the first exhaust channel 10 of the first ring piece 6 and the first exhaust channel 10 of the second ring piece 7 are on the same straight line to form a complete first exhaust channel 10, and the first exhaust channel 10 is connected to the second exhaust channel 11. In this embodiment, there are 5 first ring pieces 6 and 4 second ring pieces 7, that is, the two ends are both first ring pieces 6, that is, the contact surfaces of the two first ring pieces 6 and the plug 4 are also provided with exhaust gaps 9.

[0073] The structure of the heating coil 8 is as follows Fig.12 As shown, the heating coil 8 is wound around the outside of the middle body 2 .

[0074] The working principle of the above exhaust nozzle is as follows:

[0075] The colloid with gas enters the exhaust nozzle from the screw, first enters the axis of the flange connector 3, and flows forward. When the gas-liquid mixture reaches the axis of the exhaust unit, due to the existence of the exhaust gap 9, the gas in the gas-liquid mixture enters the first exhaust channel 10 through the exhaust gap 9, and then passes through the connected second exhaust channel 11, the third exhaust channel 12 or the fourth exhaust channel 13, the fifth exhaust channel 14, and finally is discharged from the exhaust hole 15. The liquid is isolated by the exhaust gap 9 and cannot enter the exhaust channel. It can only continue to flow forward and is finally injected from the injection port of the sub-nozzle 1.

[0076] Example 2

[0077] The structure is similar to that of the first embodiment, except that in the present embodiment, all the exhaust plates 28 have the same structure. Fig.13 As shown, one side has an exhaust slit 9, the other side is smooth and flat, a first exhaust channel 10 is opened outside the exhaust sheet, and then they are stacked in sequence, that is, in two adjacent exhaust sheets 28, the side with the exhaust slit 9 abuts against the smooth and flat side. The principle of the exhaust nozzle is basically the same as that of embodiment 1.

[0078] Example 3

[0079] The structure is similar to that of embodiment 1, except that in this embodiment, all exhaust fin structures are consistent. Fig.14 As shown, one side has an exhaust slit 9, the other side is smooth and flat, a first exhaust channel 10 is opened outside the exhaust sheet, and then they are stacked in sequence. However, different from Example 2, the exhaust slits 9 of two adjacent exhaust sheets 28 abut against each other, and the smooth and flat sides of two adjacent exhaust sheets 28 also abut against each other.

[0080] The above description of the embodiments is to facilitate those of ordinary skill in the art to understand and apply the present application. It is obvious that those familiar with the art can easily make various modifications to these embodiments and apply the general principles described herein to other embodiments without having to pay creative labor. Therefore, the present application is not limited to the embodiments herein, and improvements and modifications made by those skilled in the art based on the contents disclosed in the present application without departing from the scope and spirit of the present application are within the scope of the present application.

Claims

1. An exhaust nozzle, the nozzle comprising a sub-nozzle, a middle body and a flange connection body in sequence, wherein the axis of the sub-nozzle, the middle body and the flange connection body is hollow and provided with a colloid flow channel, characterized in that: An exhaust unit is coaxially arranged at the axis of the middle body, and the exhaust unit includes a sheath, an exhaust component arranged inside the sheath, and two plugs. The two plugs are respectively fixed to the two ends of the sheath and clamp the exhaust component between the two plugs. At least one exhaust gap is arranged in the exhaust component, and the exhaust gap allows gas to pass through but isolates molten colloid. Exhaust channels that are connected in sequence are arranged between the exhaust component and the sheath, and between the sheath and the middle body. The exhaust gap is connected to the exhaust channel. The side wall of the middle body is provided with an exhaust hole, and the exhaust hole is connected to the exhaust channel.

2. The exhaust nozzle according to claim 1, characterized in that: The exhaust assembly includes multiple exhaust sheets, all of which are coaxially arranged with the sleeve, and the outer diameter of the exhaust sheet matches the inner diameter of the sleeve, two adjacent exhaust sheets are tightly attached and at least one exhaust gap is provided on the contact surface of the two, and the exhaust sheets at both ends are in contact with the plug.

3. The exhaust nozzle according to claim 2, characterized in that: The exhaust plate comprises a first ring plate and a second ring plate, the first ring plate and the second ring plate are arranged in sequence, exhaust gaps are formed on two sides of the first ring plate, and two sides of the second ring plate are smooth and flat.

4. The exhaust nozzle according to claim 2, characterized in that: The front side of the exhaust fin is provided with an exhaust gap, the back side of the exhaust fin is smooth and flat, and all the exhaust fins are arranged in sequence in the same manner.

5. The exhaust nozzle according to claim 2, characterized in that: An exhaust gap is provided on one side of the exhaust sheet, and the other side of the exhaust sheet is smooth and flat. During installation, the side of one exhaust sheet with the exhaust gap abuts against the side of its adjacent exhaust sheet with the exhaust gap, and the smooth and flat side of the exhaust sheet abuts against the smooth and flat side of another adjacent exhaust sheet.

6. The exhaust nozzle according to any one of claims 2 to 5, characterized in that: The depth of the exhaust gap is 0.001-0.3 mm.

7. The exhaust nozzle according to claim 6, characterized in that: A plurality of first exhaust channels are arranged on the outer periphery of the exhaust plate along its axial direction, and each of the first exhaust channels matches the outer end of the exhaust gap.

8. The exhaust nozzle according to claim 7, characterized in that: The plug is hollow at the axis center and is T-shaped, including 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, a first outer thread is provided on the outside of the inner sealing portion, and a first inner thread matching the first outer thread is provided on the inner walls at both ends of the sheath, a second exhaust channel along the axial direction is provided at the engagement point of the first outer thread and the first inner thread, and the first exhaust channel and the second exhaust channel are connected.

9. The exhaust nozzle according to claim 8, 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 third 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 connection body is installed in the mounting groove at the tail end of the middle body, and a fourth exhaust channel is left between the tail end of the flange connection body and the bottom of the mounting groove.

10. The exhaust nozzle according to claim 9, 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 external sealing portion of the front end plug, and the inner diameter of the first groove is larger than the outer diameter of the external sealing portion.

11. The exhaust nozzle according to claim 9, characterized in that: A third external thread is provided on the outside of the front end of the flange connection body, and 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. A second groove is provided at the axis center of the top end of the flange connection body, and the bottom of the second groove abuts against the top of the external sealing rubber part of the tail end plug, and the inner diameter of the second groove is larger than the outer diameter of the external sealing rubber part.

12. The exhaust nozzle according to claim 8, characterized in that: A fifth exhaust passage distributed along the axial direction is provided between the middle body and the sheath, and the fifth exhaust passage is communicated with the exhaust hole.

13. The exhaust nozzle according to claim 1, characterized in that: A heating ring is arranged outside the middle body.

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