A mounting structure, mounting apparatus and mounting method for a hot runner nozzle core

Abstract

The application discloses a hot runner nozzle core mounting structure, mounting equipment and mounting method, which comprises a nozzle core and a nozzle body, the nozzle body is provided with a mounting hole, the nozzle core is inserted into the mounting hole and fixed, the nozzle core comprises an inner nozzle core, the inner nozzle core is axially penetrated, an outer wall of the inner nozzle core is fixedly connected with a wall sleeve, the inner nozzle core is inserted into the wall sleeve, the inner nozzle core comprises an end part one, the outer peripheral wall of the end part one is attached to the partial inner peripheral wall of the wall sleeve, the end part one is provided with an end face one, the end face one is located at one end of the inner nozzle core in the axial direction, an end face two is arranged at one end of the wall sleeve in the axial direction, the end face two is flush with the end face one, and the end face two and the end face one are both in abutment with the bottom surface of the mounting hole. The application provides a hot runner nozzle core mounting structure, mounting equipment and mounting method, and effectively solves the leakage problem caused by the collapse of the nozzle core.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of hot runner, in particular to a hot runner nozzle core mounting structure, mounting device and mounting method. BACKGROUND

[0002] The nozzle core plays a role of conducting heat for the glue outlet position in the whole hot runner system, and the thermal conductivity of the nozzle core material has a great influence on the appearance of the injection product gate position. If the gate position is too hot, it will cause product wire drawing, and if the gate position is too cold, it will cause the valve needle to not seal to the bottom and the gate to be raised.

[0003] At present, the nozzle core made of high thermal conductivity high-conductivity material has a hardness of only 20-25HRC, and will be extruded and deformed during the tightening process, and even collapsed, resulting in poor fit of the nozzle core and the nozzle body, and easy leakage. SUMMARY

[0004] The present application aims to overcome the shortcomings of the prior art, and provides a hot runner nozzle core mounting structure, mounting device and mounting method, which effectively solves the leakage problem caused by nozzle core collapse.

[0005] The present application discloses a hot runner nozzle core mounting structure, comprising a nozzle core and a nozzle body, the nozzle body is provided with a mounting hole, the nozzle core is inserted into the mounting hole and fixed, the nozzle core comprises an inner nozzle core, the inner nozzle core is axially through, the outer wall of the inner nozzle core is fixedly connected with a wall sleeve, the inner nozzle core is inserted into the wall sleeve, the inner nozzle core comprises an end part one, the outer peripheral wall of the end part one is fitted with part of the inner peripheral wall of the wall sleeve, the end part one is provided with an end face one, the end face one is located at one end of the inner nozzle core in the axial direction, the wall sleeve is provided with an end face two at one end in the axial direction, the end face two is flush with the end face one, and the end face two and the end face one are both in abutment with the bottom surface of the mounting hole.

[0006] Further, the wall sleeve is threadedly connected with the mounting hole.

[0007] Further, the bottom of the inner nozzle core extends out of the nozzle body.

[0008] The present application also discloses a hot runner nozzle core mounting device for mounting the nozzle core in the hot runner nozzle core mounting structure, comprising a plug rod and a spreading component, the plug rod can be inserted into the inner nozzle core, the plug rod comprises a convex ring at the top, the spreading component is hingedly connected with the convex ring, and the hinge point is located close to the outer periphery of the convex ring, the spreading component is uniformly distributed with a plurality of spreading components along the outer periphery of the convex ring, when the plug rod is inserted upward into the inner nozzle core, the length direction of the spreading component is parallel to the axial direction of the plug rod; the outer wall of the plug rod is slidingly connected with a top rod, the top rod can move up and down along the outer wall of the plug rod, and the top rod is one-to-one corresponding to the spreading component, when the top rod moves upward, the top of the top rod abuts against the bottom of the spreading component and spreads the spreading component outward, so that the length direction of the spreading component is along the radial direction of the end part one, and one end of the length direction of the spreading component abuts against the inner wall of the end part one.

[0009] Furthermore, the push rod includes a centerline P in the length direction, the top of the push rod is arc-shaped and symmetrically distributed along the centerline P, and the opening component corresponding to the push rod includes a centerline Q in the length direction, the bottom of the opening component is arc-shaped and symmetrically distributed along the centerline Q, and the centerline Q is located on the radially outward side of the centerline P along the insertion rod.

[0010] Furthermore, the convex ring is provided with a groove, one end of the supporting component is inserted into the groove and hinged, the upper end of the supporting component abuts against the upper wall of the groove, the supporting component is provided with a groove, the groove is located near the convex ring, when the push rod is in the upper limit position, the top of the push rod abuts against the inner wall of the groove.

[0011] Furthermore, the convex ring is fitted with a pin, which is inserted into the opening component and passes through the groove.

[0012] Furthermore, a cover plate is fixedly connected to the bottom of the insertion rod, and a base platform is fixedly connected to the cover plate. The base platform is located below the nozzle core, and a countersunk hole is provided inside the base platform. A sliding sleeve is slidably connected to the inner wall of the countersunk hole. The sliding sleeve includes a push rod located at the top, and a cylinder is connected to the bottom of the sliding sleeve. The sliding sleeve can move up and down to move the push rod up and down.

[0013] Furthermore, the nozzle body is inserted and installed on the lifting seat. A cylinder is connected to the upper end of the lifting seat, which can move up and down. A support ring is provided at the bottom of the lifting seat. The upper end of the support ring abuts against the bottom surface of the nozzle body. The bottom of the inner nozzle core extends out of the support ring. The lifting seat is equipped with locking screws located on both sides of the nozzle body. The locking screws press against the outer circumferential wall of the nozzle body.

[0014] This invention also discloses a method for installing a hot runner nozzle core, which uses a hot runner nozzle core installation device to install the nozzle core, including the following steps:

[0015] S1: Install nozzle

[0016] Screw the nozzle into the mounting hole, but do not tighten it completely; the wall sleeve is threaded into the inner wall of the mounting hole.

[0017] S2: Tighten the nozzle core

[0018] ① The insert rod drives the opening component to insert into the inner nozzle core, and the convex ring moves the opening component to the inner side of the end;

[0019] ② The push rod moves upward, and the push rod pushes the opening component outward to a horizontal state, so that the opening component abuts against the inner wall at the end;

[0020] ③ By screwing the inner nozzle core, press the end face tightly against the upper wall of the mounting hole;

[0021] ④ The push rod retracts downwards, the open parts are closed, and the nozzle body with the nozzle core installed is removed.

[0022] The beneficial effects of this invention are:

[0023] 1. By setting the wall sleeve, the strength of the inner nozzle core and the nozzle body connection is increased, which can ensure that the inner nozzle core is not crushed when tightening under increased torque, at the same time, in order to ensure that the flow channel has enough temperature, the inner nozzle core still uses high thermal conductivity beryllium copper, so that the inner nozzle core has a higher temperature inside the nozzle, ensuring that the plastic in the flow channel always maintains a molten state, without affecting the product quality.

[0024] 2. By setting the opening component, when the inner nozzle core and the nozzle body are tightened under increased torque, the opening component forms a support at the inner wall of the inner nozzle core, effectively preventing the inner wall of the inner nozzle core from being crushed, and improving the selection range of the inner nozzle core material, so that the inner nozzle core material with lower strength and better thermal conductivity can also be suitable for the current process, while improving the flowability of the plastic, which helps to improve the quality of the product. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 is a sectional view of the nozzle core in the embodiment;

[0026] Figure 2 is a sectional view of the installation equipment of the hot runner nozzle core in the embodiment Figure 1 ;

[0027] Figure 3 is a partial view of Figure 2 ;

[0028] Figure 4 is an enlarged view of Figure 3 place A in the embodiment;

[0029] Figure 5 is a sectional view of Figure 4 M-M direction in the embodiment;

[0030] Figure 6 is an enlarged view of Figure 5 place C in the embodiment;

[0031] Figure 7 is an enlarged view of Figure 3 place B in the embodiment;

[0032] Figure 8 is a sectional view of the installation equipment of the hot runner nozzle core in the embodiment Figure 2 ;

[0033] Figure 9 is an enlarged view of Figure 8 place D in the embodiment;

[0034] Figure 10 is a sectional view of the installation equipment of the hot runner nozzle core in the embodiment Figure 3 ;

[0035] Figure 11 isFigure 10 Enlarged view of point E in the middle.

[0036] Reference numerals: 1. Support body; 11. Cylinder 1; 12. Lifting seat; 121. Support ring; 13. Locking screw; 2. Nozzle body; 21. Mounting hole; 22. Flow channel hole; 3. Nozzle core; 31. Inner nozzle core; 31. End 1; 311. End face 1; 3111. End 2; 312. Wall sleeve; 32. End face 2; 321. Base assembly; 4. Base platform; 41. Countersunk hole; 411. Cover plate; 42. Connecting block; 43. Connecting column; 431. Cylinder 2; 44. Insert rod; 45. Convex ring; 451. Groove 1; 4511. Sliding sleeve; 46. Extension sleeve; 461. Top rod; 4611. Spring; 47. Spreading component; 48. Groove 2; 481. Pin; 49. Torsion spring; 491. Detailed Implementation

[0037] The technical solutions in this embodiment will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0038] like Figures 1-3 As shown, a hot runner nozzle core mounting structure includes a nozzle core 3 and a nozzle body 2, combined with... Figure 4 The nozzle body 2 has a mounting hole 21 at the bottom, and the nozzle core 3 is inserted into the mounting hole 21 and fixed.

[0039] like Figure 1 As shown, the nozzle core 3 includes an inner nozzle core 31, which forms a flow channel through the axial direction. A wall sleeve 32 is fixedly connected to the outer wall of the inner nozzle core 31, and the inner nozzle core 31 is inserted into the wall sleeve 32 with an interference fit. The inner nozzle core 31 includes an end 1 311 and an end 2 312 located at the upper and lower ends in the axial direction. The diameter of the end 2 312 is smaller than the diameter of the end 1 311. The outer peripheral wall of the end 1 311 fits against the upper inner peripheral wall of the wall sleeve 32. The end 1 311 has an end face 3111 located at the top. The wall sleeve 32 has an end face 321 at the upper end in the axial direction. The end face 321 is flush with the end face 3111. Figure 4 The wall sleeve 32 is threaded and inserted into the mounting hole 21. End face 321 and end face 3111 are both flush with the bottom surface of the mounting hole 21 (i.e., Figure 4 The nozzle body 2 is also provided with a flow channel hole 22, which is connected to the upper end of the flow channel in the inner nozzle core 31.

[0040] like Figure 3 As shown, the bottom of the inner nozzle core 31 extends out of the nozzle body 2 to facilitate clamping the inner nozzle core 31 during installation.

[0041] like Figures 2-11As shown in the figure, a hot runner nozzle core mounting device is used for mounting the nozzle core 3 in the mounting structure of the hot runner nozzle core.

[0042] As shown in the figure, Figure 2 The hot runner nozzle core mounting device includes a bracket body 1, an air cylinder one 11 is mounted on the upper end of the bracket body 1, the output end of the air cylinder one 11 penetrates downward through the bracket body 1 and is fixedly connected with a lifting seat 12, and the lifting seat 12 can move up and down. A through hole is arranged on the inner side of the lifting seat 12, the nozzle body 2 is inserted into the through hole of the lifting seat 12, a supporting ring 121 is arranged on the bottom of the lifting seat 12, the supporting ring 121 extends radially inward along the inner wall of the through hole of the lifting seat 12 to form an annular structure, the upper end surface of the supporting ring 121 abuts against the bottom surface of the nozzle body 2, and the bottom of the inner nozzle core 31 extends out of the supporting ring 121.

[0043] As shown in the figure, Figure 2 The lifting seat 12 is threadedly connected with locking screws 13, the locking screws 13 are located on both sides of the nozzle body 2 in the axial direction, the locking screws 13 can be screwed in and out along the radial direction of the nozzle body 2, and when the locking screws 13 are screwed in, the circumferential outer wall of the nozzle body 2 can be compressed to fix the nozzle body 2.

[0044] As shown in the figure, Figure 2 The hot runner nozzle core mounting device further includes a base assembly 4, the base assembly 4 is located below the lifting seat 12, and the base assembly 4 includes a base table 41 and an air cylinder two 44. Figure 7 The bottom of the base table 41 is provided with a counterbore 411, the counterbore 411 is fixedly provided with a cover plate 42 at the bottom, a sliding sleeve 46 is slidably connected in the counterbore 411, the bottom of the sliding sleeve 46 is connected with a connecting column 431, the connecting column 431 penetrates through the cover plate 42 and the bottom of the connecting column 431 is connected with a connecting block 43, the connecting block 43 is fixedly connected with the output end of the air cylinder two 44, and the sliding sleeve 46 can move up and down.

[0045] A spring 47 is arranged in the counterbore 411, the lower end of the spring 47 abuts against the sliding sleeve 46, the upper end of the spring 47 abuts against the wall surface of the counterbore 411, and the spring 47 functions to slow down the upward movement speed of the sliding sleeve 46 and improve safety.

[0046] As shown in the figure, Figure 3 The upper end of the sliding sleeve 46 is provided with an extension sleeve 461, the extension sleeve 461 is a cylindrical structure, the extension sleeve 461 penetrates upward through the base table 41, the upper end of the extension sleeve 461 is provided with a top rod 4611, the top rod 4611 is a long rod structure, the top rod 4611 extends upward, and six top rods 4611 are arranged along the circumferential direction of the extension sleeve 461.

[0047] As shown in the figure, Figure 3 The cover plate 42 is fixedly connected with an insertion rod 45, the insertion rod 45 penetrates upward through the sliding sleeve 46 and the extension sleeve 461 and penetrates through the six top rods 4611.

[0048] Combination Figure 3 , Figure 4 , the insertion rod 45 includes a convex ring 451 at the top, the convex ring 451 is a disc structure, the outer diameter of the convex ring 451 is larger than the insertion rod 45, and the convex ring 451 is combined with Figure 5 , Figure 6 , the convex ring 451 is provided with six groove bodies 4511, which are uniformly distributed along the circumference of the convex ring 451, as shown in Figure 4 , the groove bodies 4511 are recessed and extend upwards along the lower end of the convex ring 451 and do not penetrate through the top of the convex ring 451.

[0049] As shown in Figure 6 , the convex ring 451 is hingedly connected with the strutting component 48, and the hinge point is located close to the outer periphery of the convex ring 451. Specifically, the convex ring 451 is provided with a bolt 49, the bolt 49 penetrates through the groove body 4511, the bolt 49 is hingedly connected with the strutting component 48, and the strutting component 48 is in a strip shape and has one end in the length direction located in the groove body 4511. The strutting component 48 is provided with a torsion spring 491, the torsion spring 491 is located in the groove body 4511, the bolt 49 penetrates through the torsion spring 491, one end of the torsion spring 491 is fixed to the inner wall of the groove body 4511, and the other end is fixed to the strutting component 48. In combination Figure 9 , the strutting component 48 can be folded under the action of the torsion spring 491 and form a drooping state.

[0050] As shown in Figure 5 , the strutting component 48 is arranged in one-to-one correspondence with the groove body 4511 and the top rod 4611, and in the strutting state, the length direction of the strutting component 48 is along the radial direction of the convex ring 451.

[0051] As shown in Figure 8 , 9 , Figure 9 , the strutting component 48 is in a folded state, at this time, the top rod 4611 is located at the lower limit position, the strutting component 48 is in a drooping state under the action of the torsion spring 491, and the top rod 4611 and the strutting component 48 are spaced apart in an up-down direction.

[0052] As shown in Figure 9 , the top rod 4611 includes a center line P in the length direction, the top of the top rod 4611 is in a circular arc shape and is symmetrically distributed along the center line P, the strutting component 48 corresponding to the top rod 4611 includes a center line Q in the length direction, the bottom of the strutting component 48 is in a circular arc shape and is symmetrically distributed along the center line Q, and the center line Q is located on the side outward of the center line P in the radial direction of the insertion rod 45. This makes the top of the top rod 4611 abut against the bottom of the strutting component 48 and outwardly expand the strutting component 48 when the top rod 4611 moves upwards, in combination Figure 4The length direction of the expansion component 48 is arranged radially along the end portion one 311, and one end of the length direction of the expansion component 48 is in abutment with the inner wall of the end portion one 311, so that the expansion component 48 supports the inner wall of the end portion one 311.

[0053] As shown in Figure 4 , the expansion component 48 is provided with a groove two 481 located on the side close to the convex ring 451. When the top rod 4611 is located at the upper limit position, the groove two 481 opens downward, and the top of the top rod 4611 abuts against the upper wall of the groove two 481, so that the top rod 4611 and the upper wall of the groove two 481 limit the expansion component 48 upward and downward, so that the expansion component 48 forms a horizontal expansion state.

[0054] The installation method of the installation equipment of the hot runner nozzle core is:

[0055] S1: install the nozzle core

[0056] ①As shown in Figure 8 , the nozzle body 2 passes through the support body 1, the bottom of the nozzle body 2 is inserted into the lifting seat 12, and the nozzle body 2 is tightly fixed by the locking screw 13.

[0057] ②Combined with Figure 4 , Figure 8 , the nozzle core 3 is screwed into the installation hole 21 upward, but not tightly, and the wall sleeve 32 is threadedly connected with the inner wall of the installation hole 21. At this time, the convex ring 451 is located below the nozzle core 3, and the height position of the convex ring 451 is the reserved space of the nozzle core 3 screwed into the installation hole 21. After the nozzle core 3 is screwed in, the end portion two 312 is arranged downward.

[0058] As shown in Figure 9 , at this time, the expansion component 48 is in a folded state, the length direction of the expansion component 48 is parallel to the axis of the insertion rod 45, and the insertion rod 45 can drive the expansion component 48 to be inserted into the end portion two 312 of the inner nozzle core 31.

[0059] S2: tighten the nozzle core

[0060] ①As shown in Figure 10 , 11 , under the driving of the cylinder one 11, the lifting seat 12 moves downward, so that the insertion rod 45 drives the expansion component 48 to be inserted into the end portion two 312 of the inner nozzle core 31, and the convex ring 451 moves the expansion component 48 to the inside of the end portion one 311;

[0061] ②Combined with Figure 4 , Figure 9When the cylinder two 44 drives, the ejector rod 4611 moves upward, and in the moving process, the ejector rod 4611 spreads the support part 48 outward to the horizontal state, and when the ejector rod 4611 moves to the upper end limit position, the ejector rod 4611 is inserted into the groove two 481 and abuts to limit the support part 48, and at the same time, the upper wall of the groove two 481 limits the upper end of the support part 48, so that the support part 48 is in contact with the inner wall of the end one 311 in the horizontal state;

[0062] ③As shown in Figure 3 、 Figure 4 , by screwing the inner nozzle core 31, the end face one 3111 is tightly installed on the upper wall of the installation hole 21;

[0063] ④Under the drive of the cylinder two 44, the ejector rod 4611 is retracted downward, the support part 48 is folded and droops under the action of the torsion spring 491, the lifting seat 12 is retracted upward, the locking screw 13 is loosened and the nozzle body 2 with the installed nozzle core 3 is taken out.

[0064] The above is only the preferred embodiment of the present application, and the protection scope of the present application is not limited to the above-mentioned embodiment, and any technical scheme belonging to the idea of the present application is within the protection scope of the present application. It should be pointed out that, for ordinary skilled in the art, some improvements and decorations without departing from the principle of the present application are also considered as the protection scope of the present application.

Claims

1. A method of installing a hot runner nozzle core, comprising a hot runner nozzle core installation apparatus and a hot runner nozzle core installation structure, the hot runner nozzle core installation structure comprising a nozzle core (3) and a nozzle body (2) provided with a mounting hole (21) into which the nozzle core (3) is inserted and fixed, characterized in that, The mouth core (3) includes an inner mouth core (31) which is axially through, an outer wall of the inner mouth core (31) is fixedly connected with a wall sleeve (32), the inner mouth core (31) is inserted into the wall sleeve (32), the inner mouth core (31) includes an end one (311), the outer peripheral wall of the end one (311) is fitted with the partial inner peripheral wall of the wall sleeve (32), the end one (311) is provided with an end face one (3111), the end face one (3111) is located at one end of the inner mouth core (31) in the axial direction, an end face two (321) is arranged at one end of the wall sleeve (32) in the axial direction, the end face two (321) is flush with the end face one (3111), and the end face two (321) and the end face one (3111) are both in abutment with the bottom surface of the mounting hole (21); The mounting equipment of the hot runner nozzle core includes a plug rod (45) and a strutting component (48), the plug rod (45) can be inserted into the inner mouth core (31), the plug rod (45) includes a convex ring (451) located at the top, the strutting component (48) is hingedly connected with the convex ring (451), and the hinging point is located close to the outer periphery of the convex ring (451), and the strutting component (48) is uniformly distributed with a plurality of strutting components (48) along the outer periphery of the convex ring (451), when the plug rod (45) is inserted upward into the inner mouth core (31), the length direction of the strutting component (48) is parallel to the axial direction of the plug rod (45); The outer wall of the plug rod (45) is slidably connected with a jack (4611), the jack (4611) can move up and down along the outer wall of the plug rod (45), the jack (4611) is one-to-one corresponding with the strutting component (48), when the jack (4611) moves upward, the top of the jack (4611) abuts against the bottom of the strutting component (48) and outwardly struts the strutting component (48), so that the length direction of the strutting component (48) is along the radial direction of the end one (311), and one end of the length direction of the strutting component (48) is in abutment with the inner wall of the end one (311); Further comprising the following steps: S1: install the mouth core; The mouth core (3) is screwed into the mounting hole (21), and is not tightened, and the wall sleeve (32) is threadedly connected with the inner wall of the mounting hole (21); S2: tighten the mouth core; ①The plug rod (45) drives the strutting component (48) to be inserted into the inner mouth core (31), and the convex ring (451) moves the strutting component (48) to the inside of the end one (311); ②The jack (4611) moves upward, and the jack (4611) outwardly struts the strutting component (48) to a horizontal state, so that the strutting component (48) is in abutment with the inner wall of the end one (311); ③The inner mouth core (31) is screwed to abut the end face one (3111) against the upper wall surface of the mounting hole (21); ④The jack (4611) is retracted downward, the strutting component (48) is folded, and the nozzle body (2) with the installed mouth core (3) is taken out.

2. A method of installing a hot-foil nozzle core according to claim 1, wherein The wall sleeve (32) is threadedly connected and inserted into the mounting hole (21).

3. The method of installing a hot-foil nozzle core of claim 1 wherein, The inner nozzle core (31) extends out of the nozzle body (2) at the bottom.

4. The method of installing a hot-foil nozzle core of claim 1 wherein, The top rod (4611) includes a lengthwise center line P, and the top rod (4611) is circular at the top and symmetrically distributed along the center line P. The corresponding support component (48) includes a lengthwise center line Q, and the support component (48) is circular at the bottom and symmetrically distributed along the center line Q. The center line Q is located on the side of the center line P radially outward of the insertion rod (45).

5. The method of installing a hot-foil nozzle core of claim 1 wherein, The convex ring (451) is provided with a groove one (4511), and one end of the support component (48) is inserted into the groove one (4511) and hinged. The upper end of the support component (48) abuts against the upper wall of the groove one (4511). The support component (48) is provided with a groove two (481), which is located close to the convex ring (451). When the top rod (4611) is located at the upper limit position, the top of the top rod (4611) abuts against the inner wall of the groove two (481).

6. A method of installing a hot-foil nozzle core according to claim 5, wherein The convex ring (451) is provided with a latch (49), which is inserted into the support component (48) and passes through the groove one (4511).

7. The method of installing a hot-foil nozzle core of claim 1 wherein, The insertion rod (45) is fixedly connected with a cover plate (42) at the bottom. The cover plate (42) is fixedly connected with a base table (41), which is located below the nozzle core (3). The base table (41) is provided with a counterbore (411) inside. The counterbore (411) is slidably connected with a sliding sleeve (46) on the inner wall. The sliding sleeve (46) includes the top rod (4611) at the top. The sliding sleeve (46) is connected with a cylinder two (44) at the bottom. The sliding sleeve (46) can move up and down to move the top rod (4611) up and down.

8. The method of installing a hot-foil nozzle core of claim 1 wherein, The nozzle body (2) is inserted and installed in a lifting seat (12). The lifting seat (12) is connected with a cylinder one (11) at the upper end. The lifting seat (12) can move up and down. The lifting seat (12) is provided with a support ring (121) at the bottom. The upper end surface of the support ring (121) abuts against the bottom surface of the nozzle body (2). The inner nozzle core (31) extends out of the support ring (121) at the bottom. The lifting seat (12) is provided with locking screws (13), which are located on both sides of the nozzle body (2). The locking screws (13) press the circumferential outer wall of the nozzle body (2).

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