Mounting structure for hot nozzle of hot runner

Abstract

The utility model relates to a hot runner hot nozzle mounting structure which comprises a splitter plate, a hot nozzle and a hot nozzle flange, a hot nozzle mounting hole is arranged below the splitter plate, one end of the hot nozzle is provided with a flange part protruding outwards to form a mounting end, and the inner cylindrical surface of the hot nozzle mounting hole and the outer cylindrical surface of the hot nozzle flange are respectively provided with threads which are matched with each other. When the hot nozzle flange is screwed into the hot nozzle mounting hole, the flange part and the splitter plate are tightly jacked, the flange part and the hot nozzle are detachable, and when the flange part is mounted on the hot nozzle, the flange part cannot move in the axis direction of the hot nozzle; therefore, when the flange part is detached, the hot nozzle flange can be sleeved from the mounting end of the hot nozzle, and when the flange part is mounted, the hot nozzle flange can abut against the flange part to tightly abut against the hot nozzle and the splitter plate. According to the scheme, the interference problem caused when the hot nozzle flange is installed on the hot nozzle flange part and the leading-out wire end is solved, more importantly, it can be ensured that when continuous large injection molding pressure acts on the hot nozzle, the hot nozzle flange can provide enough jacking force, and the material leakage problem is avoided.

Description

Technical Field

[0001] The utility model relates to the field of hot runner injection molds, in particular to a hot runner nozzle installation structure. Background Art

[0002] Hot runner injection mold is an advanced injection molding technology that uses a built-in heating system to maintain the fluidity of plastic in the runner system (i.e., the channel from the injection molding machine nozzle to the mold cavity). Compared with the traditional cold runner system, the biggest advantage of this technology is that the runner system is always heated, which can reduce the cooling and solidification of the plastic during the flow process, thereby reducing defects such as bubbles and warping of the product. Among them, the hot nozzle is one of the key components of the hot runner injection mold. It is responsible for transporting the molten plastic from the main channel to each cavity, and it also needs to be equipped with a heating system.

[0003] Generally, the heating methods of the hot nozzle are divided into copper sleeve heating and embedded heating. Copper sleeve heating is to mill a groove on the copper tube with excellent thermal conductivity and convenient machining, embed the heater into the groove, and then cover and fix the heating copper tube on the hot nozzle. In this scheme, there is a gap between the heater and the groove, and there is also a gap between the inner hole of the copper sleeve and the outer diameter of the hot nozzle. The existence of the gap determines the loss and brings about the problems of local high temperature and local cold spots. Embedded heating is to directly mill a groove on the hot nozzle body, and then embed the heater in shape. Compared with the copper sleeve heater, it reduces the matching gap and reduces the heat loss. It is the preferred solution for heating the hot nozzle.

[0004] However, there are certain difficulties in installing the embedded heating nozzle and the manifold. The patent named "A hot runner system to prevent glass fiber breakage" and the patent number "CN111516217A" discloses a connection structure between the manifold and the nozzle. The two are connected by threads. This threaded connection structure solves the problems of concentricity and leakage to a certain extent. However, there is a heater wrapped around the nozzle, and the wire ends are led out at the head and tail of the wrapping. Due to the uncertainty of the final tightening position of the threaded connection, the direction of the wire ends will be random after the nozzle is fixed, which will cause serious difficulties in the overall wiring.

[0005] In order to solve the problem of wire outlet, the solution that technicians generally think of is to add a rotating fastener to connect the hot nozzle and the manifold to replace the rotating fastening of the hot nozzle, so as to achieve the orientation of the wire head on the hot nozzle. However, a further problem is that since the hot nozzle must be installed in a docking connection with the internal flow channel of the manifold, the hot nozzle must be hoisted under the manifold and cannot be hung through the manifold. Under this limitation, technicians generally think of setting a flange at the end of the hot nozzle, and then using a rotating fastener to tighten the hot nozzle and the manifold. In this case, a new problem arises: since the heater wrapped around the lower end of the hot nozzle has a lead-out wire head, and the upper end of the hot nozzle is provided with a protruding flange, the rotating fastener needs to avoid interference and can be installed between the flange and the lead-out wire head. At the same time, it is necessary to ensure that the rotating fastener has a large tightening force to fully tighten the hot nozzle and the manifold, because a large pressure is often generated during injection molding. If the tightening force is not enough, the hot nozzle and the manifold will become loose, and then leakage will occur, resulting in mold failure. Utility Model Content

[0006] In view of the defects existing in the prior art, the technical problem to be solved by the utility model is to provide a hot runner hot nozzle installation structure. Such a solution can solve the interference problem between the hot nozzle flange installed on the hot nozzle flange and the lead-out wire head. More importantly, it can ensure that when a continuous large injection pressure acts on the hot nozzle, the hot nozzle flange can provide sufficient tightening force to avoid leakage problems.

[0007] In order to solve the above technical problems, the utility model proposes the following technical solutions:

[0008] A hot runner hot nozzle installation structure includes a diverter plate, a hot nozzle and a hot nozzle flange. A hot nozzle installation hole is provided below the diverter plate, and one end of the hot nozzle is provided with a flange portion protruding outward to form a installation end. The inner cylindrical surface of the hot nozzle installation hole and the outer cylindrical surface of the hot nozzle flange are respectively provided with mutually matching threads. When the hot nozzle flange is screwed into the hot nozzle installation hole, the flange portion is pressed against the diverter plate, and the flange portion and the hot nozzle are detachable. When the flange portion is installed on the hot nozzle, the flange portion cannot move along the axis direction of the hot nozzle, so that when the flange portion is removed, the hot nozzle flange can be inserted from the installation end of the hot nozzle, and when the flange portion is installed, the hot nozzle flange can press the hot nozzle against the diverter plate by pressing against the flange portion.

[0009] The main problem raised by the background technology of the utility model is how to install the rotating fastener (i.e., the hot nozzle flange) between the flange part of the hot nozzle and the lead-out wire head. The way that the general technicians can easily think of is to make corresponding structural adjustments to the hot nozzle flange. For example, the hot nozzle flange is designed to be split into left and right halves, and the hot nozzle flange is buckled on the hot nozzle during installation, and then the hot nozzle flange and the hot nozzle mounting hole on the diverter plate are screwed together; for another example, a through groove extending along the axial direction can be opened on the hot nozzle flange (the cross section of the hot nozzle flange is C-shaped), and the width of the through groove is sufficient to avoid the lead-out wire head, and then the hot nozzle flange is screwed.

[0010] However, the hot nozzle flanges of the above solutions all have the problem of being unable to be tightened: the threads of the split hot nozzle flange are not easy to align and may shift during the tightening process; the open hot nozzle flange itself will deform during the tightening process, resulting in the threads being unable to be actually tightened. Once the hot nozzle flange cannot be tightened, in the case of continuous injection pressure, the gap between the hot nozzle and the manifold will continue to increase, resulting in serious material leakage, which is another major problem to be solved by the utility model.

[0011] On this basis, this solution completely overturns the above ideas. When designing, the hot nozzle flange is first kept in an integrated structure, and the interference problem is solved in the flange part, that is, a flange part that can be detached and fixedly installed is designed. After this design, the hot nozzle flange can be inserted from the upper part of the hot nozzle, and then the flange part is fixedly installed on the hot nozzle, and finally the hot nozzle flange and the manifold are tightened. This solution solves the interference problem between the hot nozzle flange installed on the hot nozzle flange and the lead-out wire head. More importantly, it can ensure that when a large injection pressure is continuously applied to the hot nozzle, the hot nozzle flange can provide sufficient tightening force to avoid leakage problems.

[0012] Preferably, the mounting end of the hot nozzle is provided with an annular groove, and the flange part is detachably mounted in the annular groove. The annular groove can provide a larger contact area for the flange part, and the larger contact area can effectively transmit the tightening pressure and improve the reliability of the mounting structure.

[0013] Furthermore, the flange is provided with a mounting hole, and the diameter of the mounting hole is larger than the bottom diameter of the annular groove to form a gap. Because of processing errors, for example, the verticality of the top surface of the hot nozzle and the side surface cannot be guaranteed. If the flange and the hot nozzle are relatively fixed, there will be a problem that the top surface of the hot nozzle and the top surface of the hot nozzle mounting hole cannot be fully contacted during installation, thereby causing leakage. Using the two-stage support solution of the hot nozzle flange and the flange, the flange can move relatively in the annular groove, which is equivalent to the hot nozzle having a certain movable space. During installation, it can ensure that the top surfaces are fully in contact, reducing the occurrence of leakage problems.

[0014] As a preferred embodiment, the flange portion is designed as an insert sleeve, which is composed of two semicircular rings, and the two semicircular rings are combined and embedded in the ring groove. The left-right split design facilitates the installation of the insert sleeve and reduces the difficulty of installation.

[0015] As a preference, the flange portion is designed as an open elastic ring, which is embedded in the ring groove. The elastic ring with an opening can be directly embedded in the ring groove, which can also reduce the difficulty of installation.

[0016] Preferably, the flange is a butt nut, the inner cylindrical surface of the butt nut is provided with an internal thread, the outer cylindrical surface of the hot nozzle installation end is provided with an external thread, and the butt nut is screwed to the hot nozzle. The threaded connection between the flange and the hot nozzle can enhance the connection strength and improve the reliability of the installation structure.

[0017] Preferably, a receiving hole is provided at one end of the hot nozzle flange facing the flange portion, the bottom surface of the receiving hole abuts against the end surface of the flange portion, and the inner cylindrical surface of the receiving hole abuts against the outer cylindrical surface of the flange portion. Since the flange portion adopts a detachable structure (such as the above-mentioned sleeve), if only a flat hot nozzle flange is used to press against the flange portion, the flange portion will be separated from the hot nozzle, resulting in failure of the installation structure. Providing a receiving hole on the hot nozzle flange can limit the movement of the flange portion, thereby preventing the flange portion from being separated from the hot nozzle and causing failure of the installation structure. On the other hand, when the hot nozzle flange presses the flange portion and the hot nozzle upward, the flange portion will cause a certain bending deformation due to the upward movement of the hot nozzle flange. This deformation will cause the top of the hot nozzle to be unable to fully contact the top of the hot nozzle mounting hole, thereby causing leakage problems. The bottom surface and the inner cylindrical surface of the accommodating hole simultaneously press against the bottom surface and the outer cylindrical surface of the flange portion. The flange portion will transmit the deformation force generated through the outer cylindrical surface to the inner cylindrical surface of the accommodating hole and the diverter plate threadedly connected to the hot nozzle flange, thereby suppressing the deformation of the flange portion. Such a structure enables the top of the hot nozzle to fully contact the top of the hot nozzle mounting hole, and further strengthens the connection between the hot nozzle flange and the diverter plate, thereby greatly solving the problem of leakage between the hot nozzle and the diverter plate.

[0018] Furthermore, the hot nozzle flange is provided with an avoidance notch at the bottom. In order to properly lead out the lead-out wire head, the lead-out wire head can only be located between the manifold plate and the cavity plate. Also, because the hot nozzle flange requires a longer thread to have a stronger bite force, when the hot nozzle flange is mounted on the hot nozzle from top to bottom, it will not be able to move downward further due to interference from the lead-out wire head, resulting in the problem that the flange part cannot be installed. When the hot nozzle flange moves downward, the avoidance notch is aligned with the lead-out wire head, so that it moves downward a little further, solving the problem that the flange part cannot be installed.

[0019] As a preferred embodiment, it also includes a gasket and a cavity plate, the gasket is provided with a through groove, the diverter plate is fixedly mounted on the cavity plate, and the gasket is arranged between the hot nozzle flange and the cavity plate. The gasket is installed at the position of the lead-out wire head. For the convenience of installation, a through groove is opened on the gasket to avoid the lead-out wire head and completely press against the hot nozzle flange; the gasket is designed between the hot nozzle flange and the cavity plate. Such a design enables the gasket to fully press against the hot nozzle flange, solving the problem of material leakage caused by the loosening of the hot nozzle flange due to excessive injection pressure.

[0020] Preferably, a snap-fit ​​groove is provided at the bottom of the hot nozzle flange, and a snap-fit ​​protrusion is provided at the gasket, and the gasket is snap-fitted in the snap-fit ​​groove through the snap-fit ​​protrusion. If the gasket is directly placed on the cavity plate and then the manifold is installed, there will be a problem that the through groove and the lead-out wire head cannot be aligned, causing damage to the lead-out wire head. In this way, the gasket is snap-fitted to the bottom of the hot nozzle flange and then the manifold and the cavity plate are installed, which optimizes the installation steps and solves the installation problem caused by interference.

[0021] In summary, this solution solves the interference problem between the hot nozzle flange installed on the hot nozzle flange and the lead-out wire head. More importantly, it can ensure that when a continuous large injection pressure acts on the hot nozzle, the hot nozzle flange can provide sufficient tightening force to avoid leakage problems. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The utility model is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0023] Figure 1 is a schematic diagram of the assembly structure of the embodiment;

[0024] Figure 2 is a cross-sectional view of the hot nozzle installation structure of the embodiment;

[0025] Figure 3 is a structural schematic diagram of the first embodiment of the flange portion;

[0026] Figure 4 is a schematic structural diagram of a second embodiment of the flange portion;

[0027] Figure 5 is a cross-sectional view of a third embodiment of the flange portion;

[0028] Figure 6 It is a schematic diagram of the installation relationship between the manifold, the hot nozzle, the hot nozzle flange, the gasket and the cavity plate of the embodiment;

[0029] Among them: diverter plate-1, hot nozzle mounting hole-11, positioning countersunk hole-12, hot nozzle-2, flange part-21, sleeve-211, elastic ring-212, abutting nut-213, mounting hole-214, ring groove-22, hot nozzle flange-3, accommodating hole-31, avoidance notch-32, engaging groove-33, gasket-4, through groove-41, engaging protrusion-42, cavity plate-5, heater-6, lead-out wire head-61. DETAILED DESCRIPTION

[0030] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments.

[0031] A hot runner nozzle 2 mounting structure comprises a manifold plate 1, a nozzle 2 and a nozzle flange 3, wherein a nozzle mounting hole 11 is provided below the manifold plate 1, and a flange portion 21 protruding outward is provided at one end of the nozzle 2 to form a mounting end, and the inner cylindrical surface of the nozzle mounting hole 11 and the outer cylindrical surface of the nozzle flange 3 are respectively provided with mutually matching threads, and the nozzle flange 3 is screwed into the nozzle mounting hole 11 to tighten the flange portion 21 against the manifold plate 1, and the flange portion 21 and the nozzle 2 are detachable, and when the flange portion 21 is installed on the nozzle 2, the flange portion 21 cannot move along the axial direction of the nozzle 2, so that when the flange portion 21 is removed, the nozzle flange 3 can be inserted from the mounting end of the nozzle 2, and when the flange portion 21 is installed, the nozzle flange 3 can tighten the nozzle 2 against the manifold plate 1 by pressing against the flange portion 21.

[0032] The main problem raised by the background technology of the utility model is how to install the rotating fastener (i.e., the hot nozzle flange 3) between the flange portion 21 of the hot nozzle 2 and the lead-out wire head 61. The method that a general technician can easily think of is to make corresponding structural adjustments to the hot nozzle flange 3. For example, the hot nozzle flange 3 is designed to be split into left and right halves, and the hot nozzle flange 3 is buckled on the hot nozzle 2 during installation, and then the hot nozzle flange 3 and the hot nozzle 2 mounting hole 11 on the diverter plate 1 that are integrated as one are screwed together; for another example, a through groove extending along the axial direction can be opened on the hot nozzle flange 3 (the cross section of the hot nozzle flange 3 is C-shaped), and the width of the through groove is sufficient to avoid the lead-out wire head 61, and then the hot nozzle flange 3 is screwed tightly.

[0033] However, the hot nozzle flange 3 of the above schemes all have the problem of being unable to be tightened: the threads of the split hot nozzle flange 3 are not easy to align and may shift during the tightening process; the open hot nozzle flange 3 itself will deform during the tightening process, resulting in the threads being unable to be actually tightened. Once the hot nozzle flange 3 cannot be tightened, in the case of continuous injection pressure, the gap between the hot nozzle 2 and the manifold 1 will continue to increase, resulting in serious material leakage, which is another major problem to be solved by the utility model.

[0034] On this basis, this solution completely overturns the above ideas. When designing, the hot nozzle flange 3 is first kept in an integrated structure, and the interference problem is solved by the flange part 21, that is, the flange part 21 is designed to be detachable and fixed. After such a design, the hot nozzle flange 3 can be inserted from the upper part of the hot nozzle 2, and then the flange part 21 is fixedly installed on the hot nozzle 2, and finally the hot nozzle flange 3 and the manifold 1 are tightened. Such a solution solves the interference problem between the hot nozzle flange 3 installed on the flange part 21 of the hot nozzle 2 and the lead-out wire head 61. More importantly, it can ensure that when a large injection pressure is continuously applied to the hot nozzle 2, the hot nozzle flange 3 can provide sufficient tightening force to avoid leakage problems.

[0035] The following is a specific embodiment of how to set the flange portion 21 on the hot nozzle 2:

[0036] First embodiment

[0037] like Figure 3 As shown, in the first embodiment, the mounting end of the hot nozzle 2 is provided with an annular groove 22, and the flange portion 21 is designed as an insert sleeve 211, which is composed of two semicircular rings, and the two semicircular rings are combined and embedded in the annular groove 22. The left-right split design facilitates the installation of the insert sleeve 211 and reduces the difficulty of installation.

[0038] Second embodiment

[0039] like Figure 4 As shown, in the second embodiment, the mounting end of the hot nozzle 2 is also an annular groove 22, and the flange portion 21 is designed as an open elastic ring 212, and the elastic ring 212 is embedded in the annular groove 22. The elastic ring 212 with an opening can be directly embedded in the annular groove 22, which reduces the difficulty of installation.

[0040] In both embodiments, an annular groove 22 is designed at the mounting end of the hot nozzle 2, and the flange portion 21 is detachably mounted in the annular groove 22. The annular groove 22 can provide a larger contact area for the flange portion 21, and a larger contact area can effectively transmit the tightening pressure and improve the reliability of the mounting mechanism.

[0041] Furthermore, the flange 21 is provided with a mounting hole 214, and the diameter of the mounting hole 214 is larger than the bottom diameter of the annular groove 22 to form a gap. Because there will be errors in processing, for example, the verticality of the top surface and the side surface of the hot nozzle 2 cannot be guaranteed. If the flange 21 and the hot nozzle 2 are relatively fixed, there will be a problem that the top surface of the hot nozzle 2 and the top surface of the hot nozzle 2 mounting hole 11 cannot be fully contacted during installation, thereby causing material leakage. The flange 21 can be relatively movable in the annular groove 22, which is equivalent to the hot nozzle 2 having a certain movable space. During installation, the top surfaces can be guaranteed to be fully in contact, reducing the occurrence of material leakage.

[0042] Third embodiment

[0043] like Figure 5 As shown, in the third embodiment, the flange portion 21 is abutting nut 213, the inner cylindrical surface of the abutting nut 213 is provided with an internal thread, the outer cylindrical surface of the installation end of the hot nozzle 2 is provided with an external thread, and the abutting nut 213 is screwed to the hot nozzle 2. The threaded connection between the flange portion 21 and the hot nozzle 2 can enhance the connection strength and improve the reliability of the installation structure.

[0044] In the above three embodiments, a receiving hole 31 is provided at one end of the hot nozzle flange 3 facing the flange portion 21, the bottom surface of the receiving hole 31 abuts against the end surface of the flange portion 21, and the inner cylindrical surface of the receiving hole 31 abuts against the outer cylindrical surface of the flange portion 21. Since the flange portion 21 adopts a detachable structure (such as the above-mentioned sleeve 211), if only a flat hot nozzle flange 3 is used to abut against the flange portion 21, the flange portion 21 will be separated from the hot nozzle 2, resulting in failure of the installation structure. The provision of the receiving hole 31 on the hot nozzle flange 3 can limit the movement of the flange portion 21, preventing the flange portion 21 from being separated from the hot nozzle 2 and causing failure of the installation structure; on the other hand, when the hot nozzle flange 3 presses the flange portion 21 and the hot nozzle 2 upward, the flange portion 21 will bend and deform to a certain extent due to the upward movement of the hot nozzle flange 3, and this deformation will cause the top of the hot nozzle 2 to bend with the hot nozzle 2. The top of the hot nozzle mounting hole 11 cannot be fully contacted, resulting in leakage problems, while the bottom surface and the inner cylindrical surface of the accommodating hole 31 simultaneously press against the bottom surface and the outer cylindrical surface of the flange portion 21, and the flange portion 21 transmits the deformation force to the inner cylindrical surface of the accommodating hole 31 and the diverter plate 1 threadedly connected to the hot nozzle flange 3 through the outer cylindrical surface, thereby suppressing the deformation of the flange portion 21. Such a structure enables the top of the hot nozzle 2 to fully contact the top of the hot nozzle mounting hole 11, and further strengthens the connection between the hot nozzle flange 3 and the diverter plate 1, thereby solving the problem of leakage between the hot nozzle 2 and the diverter plate 1 to a great extent.

[0045] like Figure 2 as well as Figure 3 As shown, further, this solution also specifically designs the structure of how the hot nozzle flange 3 avoids the lead-out wire head 61, and the hot nozzle flange 3 is provided with an avoidance notch 32 at the bottom. In order to reasonably lead out the lead-out wire head 61, the position of the lead-out wire head 61 can only be between the manifold plate 1 and the cavity plate 5. Because the thread of the hot nozzle flange 3 is longer, it can have a stronger bite force. When the hot nozzle flange 3 is mounted on the hot nozzle 2 from top to bottom, it will not be able to move downward further due to the interference of the lead-out wire head 61, resulting in the problem that the flange part 21 cannot be installed. When the hot nozzle flange 3 moves downward, the avoidance notch 32 is aligned with the lead-out wire head 61, so that it moves downward for a while, solving the problem that the flange part 21 cannot be installed.

[0046] like Figure 6As shown, this solution also specifically designs how the gasket 4 avoids the structure of the lead-out wire head 61 and further presses the structure of the hot nozzle flange 3, and also includes a gasket and a cavity plate 5. The gasket 4 is provided with a through groove 41, the diverter plate 1 is fixedly mounted on the cavity plate 5, and the gasket 4 is fixedly mounted between the hot nozzle flange 3 and the cavity plate 5. The installation position of the gasket 4 is just at the position of the lead-out wire head 61. For the convenience of installation, a through groove 41 is opened on the gasket 4 to avoid the lead-out wire head 61, and then completely press against the hot nozzle flange 3; the gasket 4 is designed between the hot nozzle flange 4 and the cavity plate 5. Such a design enables the gasket 3 to fully press against the hot nozzle flange 3, solving the problem of material leakage caused by the loosening of the hot nozzle flange 3 due to excessive injection pressure.

[0047] Preferably, a snap-fit ​​groove 33 is provided at the bottom of the hot nozzle flange 3, and a snap-fit ​​protrusion 34 is provided at the gasket, and the gasket is snap-fitted in the snap-fit ​​groove 33 through the snap-fit ​​protrusion 34. If the gasket 4 is directly placed on the cavity plate 5 and then the manifold 1 is installed, there will be a problem that the through groove 41 and the lead-out wire head 61 cannot be aligned, causing damage to the lead-out wire head 61. In this way, the gasket 4 is snap-fitted to the bottom of the hot nozzle flange 3, and then the manifold 1 and the cavity plate 5 are installed, which optimizes the installation steps and solves the installation problem caused by interference.

[0048] In summary, this solution solves the interference problem between the hot nozzle flange installed on the hot nozzle flange and the lead-out wire head. More importantly, it can ensure that when a continuous large injection pressure acts on the hot nozzle, the hot nozzle flange can provide sufficient tightening force to avoid leakage problems.

[0049] In short, the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A hot runner nozzle installation structure, comprising a manifold, a nozzle and a nozzle flange, wherein a nozzle installation hole is provided below the manifold, and one end of the nozzle is provided with a flange protruding outward to form a mounting end, and the inner cylindrical surface of the nozzle installation hole and the outer cylindrical surface of the nozzle flange are respectively provided with mutually matching threads, and when the nozzle flange is screwed into the nozzle installation hole, the flange is pressed against the manifold, and the characteristics are as follows: The flange part and the hot nozzle are detachable, and when the flange part is installed on the hot nozzle, the flange part cannot move along the axial direction of the hot nozzle, so that when the flange part is removed, the hot nozzle flange can be inserted from the installation end of the hot nozzle, and when the flange part is installed, the hot nozzle flange can tighten the hot nozzle and the diverter plate by pressing against the flange part.

2. The hot runner nozzle installation structure according to claim 1, characterized in that: The mounting end of the hot nozzle is provided with an annular groove, and the flange portion is detachably mounted in the annular groove.

3. The hot runner nozzle installation structure according to claim 2, characterized in that: The flange portion is provided with a mounting hole, and the diameter of the mounting hole is larger than the bottom diameter of the annular groove to form a gap.

4. The hot runner nozzle installation structure according to claim 3, characterized in that: The flange part is an insert sleeve, which is composed of two semicircular rings, and the two semicircular rings are combined and embedded in the ring groove.

5. The hot runner nozzle installation structure according to claim 3, characterized in that: The flange portion is an open elastic ring, and the elastic ring is embedded in the ring groove.

6. The hot runner nozzle installation structure according to claim 1, characterized in that: The flange portion is a butt nut, the inner cylindrical surface of the butt nut is provided with an internal thread, the outer cylindrical surface of the hot nozzle mounting end is provided with an external thread, and the butt nut is screwed to the hot nozzle.

7. The hot runner nozzle installation structure according to any one of claims 1 to 6, characterized in that: An accommodating hole is provided at one end of the hot nozzle flange facing the flange part, the bottom surface of the accommodating hole abuts against the end surface of the flange part, and the inner cylindrical surface of the accommodating hole abuts against the outer cylindrical surface of the flange part.

8. The hot runner nozzle installation structure according to claim 7, characterized in that: An avoidance notch is arranged at the bottom of the hot nozzle flange.

9. The hot runner nozzle installation structure according to claim 8, characterized in that: It also includes a cushion block and a cavity plate. The cushion block is provided with a through groove. The diverter plate is fixedly mounted on the cavity plate. The cushion block is arranged between the hot nozzle flange and the cavity plate.

10. The hot runner nozzle installation structure according to claim 9, characterized in that: The bottom of the hot nozzle flange is provided with a clamping groove, and the cushion block is provided with a clamping protrusion, and the cushion block is clamped in the clamping groove through the clamping protrusion.

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