Ring Sprinkler of Pouring Machine

Abstract

The present invention discloses an annular nozzle for a pouring machine, which includes a connecting member, a discharging member and a nozzle housing. The discharging member and the nozzle housing are both connected to the connecting member. The discharging member is provided with a discharging cavity and a discharging hole. A cavity is provided between the nozzle housing and the discharging member. One end of the discharging hole is communicated with the discharging cavity, and the other end is communicated with the cavity. The discharging member is provided with a first guiding portion, and the nozzle housing is provided with a second guiding portion. The first guiding portion and the second guiding portion enclose an annular opening, and the annular opening is communicated with the cavity. Thus, in the present invention, due to the provision of the annular opening and the cavity which is convenient for carrying gas, the material can be quickly sprayed annularly from the present invention, having the advantages of high spraying efficiency, large spraying range and good spraying uniformity. On the other hand, by providing the first guiding portion and the second guiding portion, it is convenient to set the size, shape, position and sprayable material direction of the annular opening to meet different spraying requirements, with strong flexibility.

Description

Technical Field

[0001] The present invention relates to the field of mechanical design, and in particular to a ring-shaped nozzle for a casting machine. Background Art

[0002] A casting machine is a commonly used production device, and shoe soles are often obtained by injecting materials into a mold using a casting machine for shaping. The nozzle of the casting machine is a key component of the casting machine. Since the materials need to pass through the nozzle for spraying, the design of the nozzle often has a profound impact on the spraying range, spraying uniformity, and spraying efficiency of the materials.

[0003] ZL202022107472.0 discloses a bent nozzle, which includes a bent nozzle, so that it can spray different positions such as the bottom or side wall of a mold structure by making a small-angle swing. However, for this type of nozzle, when spraying the side wall, it can often only spray one side wall of the mold, and the spraying range is always limited, and the spraying efficiency is low. When spraying the bottom, the spraying range it can cover is also relatively concentrated, and the spraying efficiency is still not high.

[0004] Therefore, it is an urgent need for people to design a casting machine nozzle with a larger spraying range, better spraying uniformity, and higher spraying efficiency. Summary of the Invention

[0005] The purpose of the present invention is to provide a ring-shaped nozzle for a casting machine, which can solve one or more of the above problems.

[0006] According to one aspect of the present invention, there is provided a ring-shaped nozzle for a casting machine, including a connecting member, a discharging member, and a nozzle housing. Both the discharging member and the nozzle housing are connected to the connecting member. The discharging member is provided with a discharging cavity and discharging holes. A cavity is provided between the nozzle housing and the discharging member. One end of the discharging hole is communicated with the discharging cavity, and the other end is communicated with the cavity. The discharging member is provided with a first guiding portion, and the nozzle housing is provided with a second guiding portion. The first guiding portion and the second guiding portion enclose a ring-shaped opening, and the ring-shaped opening is communicated with the cavity.

[0007] The beneficial effects of the present invention are as follows: In the present invention, the connecting piece facilitates the installation of the present invention on the pouring machine. When the present invention is in use, the material can be placed into the discharge cavity and enter the cavity through the discharge holes in the discharge cavity. At the same time, gas can be injected into the cavity, so that under the gas pressure, the material located in the cavity is pressed to the annular opening and ejected. Thus, in the present invention, due to the provision of the annular opening and the cavity that is convenient for carrying gas, the material can be quickly ejected in a circular shape from the present invention, having the advantages of high spraying efficiency, large spraying range, and good spraying uniformity. On the other hand, by providing the first guiding portion and the second guiding portion, it is convenient to set the size, shape, position, and the material spraying direction of the annular opening to meet different spraying requirements such as side spraying or bottom spraying of structures such as molds, with strong flexibility.

[0008] In some embodiments, the discharge member is provided with a connecting head and a limiting block. The connecting head is embedded in the connecting piece, and the limiting block abuts against the connecting piece. The setting of the connecting head can facilitate the fixed connection between the discharge member and the connecting piece, while the limiting block can serve as the installation limit of the discharge member on the connecting piece to ensure the proper installation of the discharge member.

[0009] In some embodiments, the present invention further includes a stirring block. The connecting piece is provided with a mixing material cavity, the mixing material cavity is communicated with the discharge cavity, and the stirring block is arranged in the mixing material cavity. The setting of the mixing material cavity can facilitate the entry of the material, while the setting of the stirring block can facilitate the stirring of the material located in the mixing material cavity, thereby improving the uniformity of the final spraying material.

[0010] In some embodiments, the connecting piece is provided with an air inlet hole and a through hole. One end of the through hole is communicated with the air inlet hole, and the other end of the through hole is communicated with the cavity. The stirring block can facilitate the stirring of the material located in the mixing material cavity to improve the uniformity of the material to be sprayed.

[0011] In some embodiments, the discharge member is provided with a positioning block, and the positioning block abuts against the side wall of the cavity. The setting of the positioning block can facilitate the fixation of the discharge member in the cavity and reduce the shaking of the discharge member during the use of the present invention.

[0012] In some embodiments, the first guiding portion is provided with a frustum side surface, and the second guiding portion is provided with a bending portion that bends away from the middle of the nozzle housing. By providing the bending portion and the frustum side surface, the annular opening and the horizontal plane can form a certain angle, and this angle will affect the ejection angle of the material, so as to meet the different material spraying requirements of users.

[0013] In some embodiments, the height where the frustum side surface is located is higher than the height where the bottom of the bending portion is located. Under this structure, the material ejected from the annular opening can be guided by the bending portion of the nozzle housing, so that the material can be ejected in a manner inclined to the horizontal plane.

[0014] In some embodiments, the height of the side surface of the frustum is not higher than the height of the bottom of the bending portion. Under this structure, the material ejected from the annular opening can be guided by the side surface of the frustum and the bending portion of the nozzle housing, so that the material can be ejected 360° to the side in a manner substantially parallel to the horizontal plane.

[0015] In some embodiments, the second guiding portion is provided with a vertical portion perpendicular to the horizontal plane, and the height of the bottom of the vertical portion is not higher than the height of the first limiting portion. Under this structure, the material ejected from the annular opening can be guided by the vertical portion of the nozzle housing, so that the material can be ejected in a manner substantially perpendicular to the horizontal plane.

[0016] In some embodiments, the cavity is provided with a pressure boosting portion, the width of the pressure boosting portion is 1.5 mm to 3 mm, and the outlet width of the annular opening is 0.2 mm to 1.2 mm. By providing a pressure boosting portion with a certain width, the pressure of the air flow can be effectively increased when passing through the pressure boosting portion, thereby improving the sprayable speed and range of the present invention. By restricting the size of the outlet width of the annular opening, the pressure of the material when passing through the outlet of the annular opening can be further increased, thereby further improving the spray speed and range of the material. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 Schematic diagram of the structure of the annular nozzle of the pouring machine according to an embodiment of the present invention.

[0018] Figure 2 Exploded view of the annular nozzle of the pouring machine according to an embodiment of the present invention.

[0019] Figure 3 Cross-sectional view of the annular nozzle of the pouring machine according to an embodiment of the present invention.

[0020] Figure 4 Marking diagram of the annular nozzle of the pouring machine according to an embodiment of the present invention.

[0021] Figure 5 Exploded view of the annular nozzle of the pouring machine according to another embodiment of the present invention.

[0022] Figure 6 Cross-sectional view of the annular nozzle of the pouring machine according to another embodiment of the present invention.

[0023] Figure 7 Marking diagram of the annular nozzle of the pouring machine according to another embodiment of the present invention.

[0024] Figure 8 Cross-sectional view of the annular nozzle of the pouring machine according to another embodiment of the present invention.

[0025] Figure 9 Schematic diagram of the annular nozzle of the pouring machine according to another embodiment of the present invention.

[0026] In the figure: 1. Connecting piece, 2. Discharging piece, 3. Nozzle housing,, 6. Stirring block, 11. Extension part, 12. Mounting hole, 21. Connecting head, 22. Limiting block, 23. Positioning block, 24. First guiding part, 302. Second guiding part, 31. Air inlet hole, 32. Through hole, 33. Bending part, 34. Vertical part, 41. Side surface of frustum, 101. Mixing material cavity, 201. Discharging cavity, 202. Discharging hole, 301. Cavity, 401. Annular opening and 501. Pressurizing part. Specific embodiments

[0027] The present invention will be further described in detail below with reference to the accompanying drawings.

[0028] Embodiment 1

[0029] Reference Figure 1 、 Figure 2 、 Figure 3 and Figure 4 A pouring machine annular nozzle of this embodiment includes a connecting piece 1, a discharging piece 2 and a nozzle housing 3.

[0030] The discharging piece 2 is provided with a connecting head 21 and a limiting block 22. The connecting head 21 is embedded in the connecting piece 1, and the connecting head 21 is fixedly connected to the connecting piece 1 through threaded cooperation, that is, the discharging piece 2 is fixedly connected to the connecting piece 1, and the limiting block 22 will abut against the connecting piece 1 to limit the connection amount of the discharging piece 2 and the connecting piece 1, so as to prevent the discharging piece 2 from being damaged due to excessive penetration into the connecting piece 1.

[0031] The connecting piece 1 is provided with a mixing material cavity 101, the discharging piece 2 is provided with a discharging cavity 201, the mixing material cavity 101 and the discharging cavity 201 are connected, and the side surface of the discharging piece 2 is also provided with discharging holes 202. There are multiple discharging holes 202, and one end of all the discharging holes 202 is connected to the discharging cavity 201. In addition, the connecting piece 1 is also provided with an extension part 11, and the extension part 11 is also provided with a mounting hole 12.

[0032] The nozzle housing 3 is also connected to the connecting member 1. The discharging member 2 is located inside the nozzle housing 3. A cavity 301 is provided between the discharging member 2 and the nozzle housing 3. Moreover, a plurality of positioning blocks 23 are provided on the discharging member 2, and all the positioning blocks 23 abut against the side wall of the cavity 301. The setting of the positioning blocks 23 can fix the position of the discharging member 2 in the cavity 301 and reduce the probability of the discharging member 2 shifting. The other ends of all the discharging holes 202 on the discharging member 2 are all communicated with the cavity 301. In addition, a pressure boosting portion 501 is provided in the cavity 301. The width of the pressure boosting portion 501 can be between 1.5 mm and 3 mm. In this embodiment, the width A1 of the pressure boosting portion 501 is preferably 2 mm.

[0033] An air inlet hole 31 and a through hole 32 are further provided on the connecting member 1. One end of the through hole 32 is communicated with the air inlet hole 31, and the other end of the through hole 32 is communicated with the cavity 301, that is, the air inlet hole 31 is communicated with the cavity 301 through the through hole 32.

[0034] A first guiding portion 24 is further provided on the discharging member 2, and a second guiding portion 302 is provided on the nozzle housing 3. An annular opening 401 is defined between the first guiding portion 24 and the second guiding portion 302, and the annular opening 401 is communicated with the cavity 301. And the width of the annular opening 401 can be set to be variable, and the width gradually decreases from top to bottom. The width of the outlet of the annular opening 401 can be between 0.2 mm and 1.2 mm. In this embodiment, the width B1 of the outlet of the annular opening 401 is preferably 0.3 mm.

[0035] The annular nozzle of the pouring machine in this embodiment further includes a stirring block 6. The stirring block 6 is arranged in the mixing material cavity 101. A threaded hole is provided in the stirring block 6 to facilitate the connection of an external mechanism, and protrusions are provided on the stirring block 6 to improve the stirring effect.

[0036] When the annular nozzle of the pouring machine in this embodiment is installed, the rotating shaft of the external power mechanism can be fixedly connected with the stirring block 6 through threaded cooperation. The extending portion 11 of the connecting member 1 is fixedly connected with the pouring machine through bolts. And the material to be poured by the pouring machine can be transmitted to the mixing material cavity 101 on the connecting member 1 through the pouring machine, and the air inlet hole 31 on the connecting member 1 can be connected with an external air supply mechanism through an air pipe.

[0037] When the annular nozzle of the pouring machine in this embodiment is in use, the material to be poured can be transmitted to the mixing material cavity 101. At this time, the external power mechanism can drive the stirring block 6 to rotate. The stirring block 6 can stir the material in the mixing material cavity 101. Then the material in the mixing material cavity 101 will flow into the discharging cavity 201 again. Then the material in the discharging cavity 201 can flow into the cavity 301 through the discharging holes 202.

[0038] Meanwhile, the external air supply mechanism can supply high-pressure gas to the air inlet hole 31. The high-pressure gas can sequentially pass through the air inlet hole 31 and the through hole 32 and finally flow into the cavity 301. Under the pressure of the high-pressure gas in the cavity 301 and under the guidance of the first guiding portion 24 and the second guiding portion 302, the material located in the cavity 301 can be pressed to the annular opening 401. Finally, the material can be annularly ejected from the annular opening 401 to facilitate spraying it onto the sole mold.

[0039] In addition, in the annular nozzle of the casting machine of this embodiment, a conical side surface 41 is provided on the first guiding portion 24, and a bending portion 33 is provided on the second guiding portion 302. The bending portion 33 bends in a direction away from the middle of the nozzle housing 3, and the height where the conical side surface 41 is located is higher than the height where the bottom of the bending portion 33 is located. Then, the material ejected from the annular opening 401 can also be guided by the bending portion 33. Thus, finally, the annular nozzle of the casting machine of this embodiment can annularly spray the material in a manner inclined to the horizontal plane.

[0040] Embodiment 2

[0041] Reference Figure 5 、 Figure 6 and Figure 7 A kind of annular nozzle of a casting machine in this embodiment includes a connecting member 1, a discharging member 2, and a nozzle housing 3.

[0042] The discharging member 2 is provided with a connecting head 21 and a limiting block 22. The connecting head 21 is embedded in the connecting member 1, and the connecting head 21 is fixedly connected to the connecting member 1 through threaded cooperation, that is, the discharging member 2 is fixedly connected to the connecting member 1, and the limiting block 22 will abut against the connecting member 1 to limit the connection amount of the discharging member 2 and the connecting member 1, thereby avoiding damage to the discharging member 2 caused by the excessive penetration of the discharging member 2 into the connecting member 1.

[0043] The connecting member 1 is provided with a mixing material cavity 101, the discharging member 2 is provided with a discharging cavity 201, the mixing material cavity 101 and the discharging cavity 201 are communicated, and the side surface of the discharging member 2 is further provided with discharging holes 202. There are multiple discharging holes 202, and one ends of all the discharging holes 202 are communicated with the discharging cavity 201. In addition, the connecting member 1 is further provided with an extending portion 11, and the extending portion 11 is further provided with a mounting hole 12.

[0044] The nozzle housing 3 is also connected to the connecting member 1. The discharging member 2 is located inside the nozzle housing 3. A cavity 301 is provided between the discharging member 2 and the nozzle housing 3. A plurality of positioning blocks 23 are provided on the discharging member 2. All the positioning blocks 23 abut against the side wall of the cavity 301. The arrangement of the positioning blocks 23 can fix the position of the discharging member 2 in the cavity 301 and reduce the probability of the discharging member 2 shifting. The other ends of all the discharging holes 202 on the discharging member 2 are all communicated with the cavity 301. In addition, the cavity 301 is also provided with a pressure boosting portion 501. The width of the pressure boosting portion 501 can be between 1.5 mm and 3 mm. In this embodiment, the width A2 of the pressure boosting portion 501 is preferably 2 mm.

[0045] The connecting member 1 is also provided with an air inlet hole 31 and a through hole 32. One end of the through hole 32 is communicated with the air inlet hole 31, and the other end of the through hole 32 is communicated with the cavity 301, that is, the air inlet hole 31 is communicated with the cavity 301 through the through hole 32.

[0046] The discharging member 2 is also provided with a first guiding portion 24, and the nozzle housing 3 is provided with a second guiding portion 302. An annular opening 401 is defined between the first guiding portion 24 and the second guiding portion 302. The annular opening 401 is communicated with the cavity 301. The width of the outlet of the annular opening 401 can be between 0.2 mm and 1.2 mm. In this embodiment, the width B2 of the outlet of the annular opening 401 is preferably 0.4 mm.

[0047] The annular nozzle of the pouring machine in this embodiment further includes a stirring block 6. The stirring block 6 is arranged in the mixing material cavity 101. A threaded hole is provided in the stirring block 6 to facilitate the connection of an external mechanism, and a protrusion is provided on the stirring block 6 to improve the stirring effect.

[0048] When the annular nozzle of the pouring machine in this embodiment is installed, the rotating shaft of the external power mechanism can be fixedly connected with the stirring block 6 through threaded cooperation. The extending portion 11 of the connecting member 1 is fixedly connected with the pouring machine through bolts. And the material to be poured by the pouring machine can be transmitted to the mixing material cavity 101 on the connecting member 1 through the pouring machine, and the air inlet hole 31 on the connecting member 1 can be connected with an external air supply mechanism through an air pipe.

[0049] When the annular nozzle of the pouring machine in this embodiment is in use, the material to be poured can be transmitted to the mixing material cavity 101. At this time, the external power mechanism can drive the stirring block 6 to rotate. The stirring block 6 can stir the material in the mixing material cavity 101. Then the material in the mixing material cavity 101 will flow into the discharging cavity 201 again. Then the material in the discharging cavity 201 can flow into the cavity 301 through the discharging holes 202.

[0050] Meanwhile, the external gas supply mechanism can supply high-pressure gas to the air inlet hole 31. The high-pressure gas can sequentially pass through the air inlet hole 31 and the through hole 32 and finally flow into the cavity 301. Under the pressure of the high-pressure gas in the cavity 301 and under the guidance of the first guiding portion 24 and the second guiding portion 302, the material located in the cavity 301 can be pressed to the annular opening 401, and finally the material can be annularly ejected from the annular opening 401 to facilitate spraying it onto the sole mold.

[0051] In addition, in the annular nozzle of the pouring machine of this embodiment, a frustum side surface 41 is provided on the first guiding portion 24, and a bending portion 33 is provided on the second guiding portion 302. The bending portion 33 bends in a direction away from the middle of the nozzle housing 3, and the height where the frustum side surface 41 is located is not lower than the height where the bottom of the bending portion 33 is located. Then, the material ejected from the annular opening 401 can also be jointly guided by the frustum side surface and the bending portion, so that finally the annular nozzle of the pouring machine of this embodiment can annularly spray the material in a manner substantially parallel to the horizontal plane.

[0052] Embodiment 3

[0053] Reference Figure 8 and Figure 9 A kind of annular nozzle of a pouring machine of this embodiment includes a connecting member 1, a discharging member 2 and a nozzle housing 3.

[0054] The discharging member 2 is provided with a connecting head 21 and a limiting block 22. The connecting head 21 is embedded in the connecting member 1, and the connecting head 21 is fixedly connected with the connecting member 1 through threaded cooperation, that is, the discharging member 2 is fixedly connected with the connecting member 1, and the limiting block 22 will abut against the connecting member 1 to limit the connection amount of the discharging member 2 and the connecting member 1, so as to avoid damage to the discharging member 2 caused by the excessive penetration of the discharging member 2 into the connecting member 1.

[0055] The connecting member 1 is provided with a mixing material cavity 101, the discharging member 2 is provided with a discharging cavity 201, the mixing material cavity 101 and the discharging cavity 201 are communicated with each other, and the side surface of the discharging member 2 is further provided with discharging holes 202. There are multiple discharging holes 202, and one end of all the discharging holes 202 is communicated with the discharging cavity 201. In addition, the connecting member 1 is further provided with an extending portion 11, and the extending portion 11 is further provided with a mounting hole 12.

[0056] The nozzle housing 3 is also connected to the connecting member 1. A cavity 301 is provided inside the nozzle housing 3. The discharging member 2 is located inside the cavity 301, and a plurality of positioning blocks 23 are provided on the discharging member 2. All the positioning blocks 23 abut against the side wall of the cavity 301. The setting of the positioning blocks 23 can fix the position of the discharging member 2 inside the cavity 301 and reduce the probability of the discharging member 2 shifting. The other ends of all the discharging holes 202 on the discharging member 2 are all communicated with the cavity 301. Additionally, a pressure boosting portion 501 is provided in the cavity 301. The width of the pressure boosting portion 501 can be between 1.5 mm and 3 mm. In this embodiment, the width A3 of the pressure boosting portion 501 is preferably 2 mm.

[0057] An air inlet hole 31 and a through hole 32 are further provided on the connecting member 1. One end of the through hole 32 is communicated with the air inlet hole 31, and the other end of the through hole 32 is communicated with the cavity 301, that is, the air inlet hole 31 is communicated with the cavity 301 through the through hole 32.

[0058] A first guiding portion 24 is further provided on the discharging member 2, and a second guiding portion 302 is provided on the nozzle housing 3. An annular opening 401 is defined between the first guiding portion 24 and the second guiding portion 302. The annular opening 401 is communicated with the cavity 301. The width of the annular opening 401 can be set to be variable and gradually decreases from top to bottom. The width of the outlet of the annular opening 401 can be between 0.2 mm and 1.2 mm. In this embodiment, the width B3 of the outlet of the annular opening 401 is preferably 0.5 mm.

[0059] The annular nozzle of the pouring machine in this embodiment further includes a stirring block 6. The stirring block 6 is provided in the mixing material cavity 101, and a threaded hole is provided inside the stirring block 6 to facilitate the connection of an external mechanism, and protrusions are provided on the stirring block 6 to improve the stirring effect.

[0060] When the annular nozzle of the pouring machine in this embodiment is installed, the rotating shaft of the external power mechanism can be fixedly connected to the stirring block 6 through threaded cooperation. The extending portion 11 of the connecting member 1 is fixedly connected to the pouring machine through bolts. And the material to be poured by the pouring machine can be transmitted to the mixing material cavity 101 on the connecting member 1 through the pouring machine, and the air inlet hole 31 on the connecting member 1 can be connected to an external air supply mechanism through an air pipe.

[0061] When the annular nozzle of the pouring machine in this embodiment is in use, the material to be poured can be transmitted to the mixing material cavity 101. At this time, the external power mechanism can drive the stirring block 6 to rotate. The stirring block 6 can stir the material located in the mixing material cavity 101. Then the material in the mixing material cavity 101 will flow into the discharging cavity 201 again. Then the material located in the discharging cavity 201 can flow into the cavity 301 through the discharging holes 202.

[0062] Meanwhile, the external gas supply mechanism can supply high-pressure gas to the air inlet hole 31. The high-pressure gas can sequentially pass through the air inlet hole 31 and the through hole 32 and finally flow into the cavity 301. Under the pressure of the high-pressure gas in the cavity 301 and under the guidance of the first guiding portion 24 and the second guiding portion 302, the material located in the cavity 301 can be pressed to the annular opening 401, and finally the material can be annularly ejected from the annular opening 401 to facilitate spraying it onto the sole mold.

[0063] In addition, in the annular nozzle of the pouring machine of this embodiment, the second guiding portion 302 is provided with a vertical portion 34. The vertical portion 34 is perpendicular to the horizontal plane, and the height of the bottom of the vertical portion 34 is not higher than the height where the first guiding portion 24 is located. The first guiding portion 24 is provided with a conical side surface 41, and for the conical side surface 41, the height of the bottom of the vertical portion 34 is not higher than the height where the conical side surface 41 is located. Then the material ejected from the annular opening 401 can also be guided by the vertical portion 34, so that finally the annular nozzle of the pouring machine of this embodiment can annularly spray the material in a manner close to perpendicular to the horizontal plane.

[0064] The above are only some embodiments of the present invention. For those of ordinary skill in the art, without departing from the inventive concept of the present invention, several modifications and improvements can still be made, and these all belong to the protection scope of the present invention.

Claims

1. Ring-shaped nozzle of a casting machine, characterized in that, It includes a connecting piece, a discharging piece and a nozzle housing. Both the discharging piece and the nozzle housing are connected to the connecting piece. The discharging piece is provided with a discharging cavity and a discharging hole. A cavity is provided between the nozzle housing and the discharging piece. One end of the discharging hole communicates with the discharging cavity, and the other end communicates with the cavity. The discharging piece is provided with a first guiding part, and the nozzle housing is provided with a second guiding part. The first guiding part and the second guiding part enclose an annular opening, and the annular opening communicates with the cavity. It includes a stirring block. The connecting piece is provided with a mixing material cavity, and the mixing material cavity communicates with the discharging cavity. The stirring block is arranged in the mixing material cavity. The connecting piece is provided with an air inlet hole and a through hole. One end of the through hole communicates with the air inlet hole, and the other end of the through hole communicates with the cavity.

2. The annular nozzle of the pouring machine according to claim 1, characterized in that, The discharging piece is provided with a connecting head and a limiting block. The connecting head is embedded in the connecting piece, and the limiting block abuts against the connecting piece.

3. The annular nozzle of the pouring machine according to claim 1, characterized in that, The discharging piece is provided with a positioning block, and the positioning block abuts against the side wall of the cavity.

4. The annular nozzle of the pouring machine according to claim 1, wherein The first guiding part is provided with a frustum side surface, and the second guiding part is provided with a bending part. The bending part bends away from the middle of the nozzle housing.

5. The annular nozzle of the pouring machine according to claim 4, wherein The height where the frustum side surface is located is higher than the height where the bottom of the bending part is located.

6. The annular nozzle of the pouring machine according to claim 4, characterized in that, The height where the frustum side surface is located is not higher than the height where the bottom of the bending part is located.

7. The annular nozzle of the pouring machine according to claim 1, characterized in that, The second guiding part is provided with a vertical part perpendicular to the horizontal plane, and the height where the bottom of the vertical part is located is not higher than the height where the first guiding part is located.

8. The annular nozzle of the pouring machine according to claim 1, characterized in that, The cavity is provided with a pressure boosting part. The width of the pressure boosting part is 1.5 mm to 3 mm, and the outlet width of the annular opening is 0.2 mm to 1.2 mm.

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