CN116512538A - Hot runner system - Google Patents

Abstract

The invention provides a hot runner system, which comprises a template and a hot nozzle assembly, wherein the hot nozzle assembly comprises a hot nozzle main body at least partially positioned in the template, a nozzle tip and a first elastic ring, wherein the nozzle tip is arranged in the template, the hot nozzle main body extends along a first direction and is provided with a first runner, the nozzle tip extends along a second direction and is provided with a second runner, a liquid outlet of the nozzle tip is matched with the inner side of a pouring gate of the template and is communicated with the second runner, one end of the first elastic ring is abutted against the template, and the other end of the first elastic ring is abutted against the hot nozzle main body so as to enable the first runner to be communicated with the second runner. The invention solves the problem that the disassembly is difficult when the tip is disassembled from the shunt nozzle in the prior art.

Description

Hot runner system

Technical Field

The invention relates to the field of hot runner molds, in particular to a hot runner system.

Background

At present, the hot runner system of the injection mold mainly comprises that the molten rubber is discharged from a gun nozzle of the injection molding machine, is split by a splitter plate and is conveyed to each hot nozzle, and then is injected into an injection gate of the mold through a liquid outlet of a nozzle core of the hot nozzle.

For some special products, glue needs to be fed into the die cavity from the side direction of the hot nozzle main body. In the prior art, one end of a hot nozzle main body is connected with a flow distribution plate through a flange, the other end of the hot nozzle main body is connected with a flow distribution nozzle, a plurality of nozzle tips are arranged on the side wall of the flow distribution nozzle and are connected with the flow distribution nozzle in a threaded connection mode and fixed through a pressing cap, and therefore lateral glue feeding is achieved.

However, some injection molded products cannot have side glue ports located near the opening of the mold. When the plurality of nozzle tips are connected to the side wall of the flow dividing nozzle in advance by means of screw connection, the nozzle tips are very difficult to install in a die; meanwhile, when the tip is required to be detached from the flow dividing nozzle, the problem is also very troublesome, and the tightness of the connection part of the tip and the flow dividing nozzle is reduced due to the increase of the detaching frequency.

Disclosure of Invention

The invention aims to provide a hot runner system, which solves the problems that in the prior art, a plurality of nozzle tips are difficult to install when being connected to the side wall of a flow dividing nozzle in advance in a threaded connection mode and then installed in a die, and the nozzle tips are difficult to disassemble when being detached from the flow dividing nozzle.

In order to achieve the above object, an embodiment of the present invention provides a hot runner system, which includes a mold plate and a hot nozzle assembly, where the hot nozzle assembly includes a hot nozzle body at least partially located in the mold plate, a nozzle tip disposed in the mold plate, and a first elastic ring, where the hot nozzle body extends along a first direction and has a first runner, and the nozzle tip extends along a second direction and has a second runner, where the first direction and the second direction form an included angle, a liquid outlet of the nozzle tip is disposed inside a pouring gate of the mold plate and is in communication with the second runner, and in the second direction, one end of the first elastic ring abuts against the mold plate, and the other end abuts against the hot nozzle body, so that the first runner and the second runner are communicated.

As a further improvement of an embodiment of the invention, wherein the mouth tip comprises a heat insulating washer, the heat insulating washer being located between the first elastic ring and the die plate in the second direction.

As a further improvement of an embodiment of the present invention, the tip includes a tip body, an annular protrusion is provided in a circumferential direction of the tip body, the heat insulation gasket and the first elastic ring are sleeved on the tip body, in the second direction, the heat insulation gasket and the first elastic ring are located between the annular protrusion and the template, and two ends of the first elastic ring are abutted against the annular protrusion and the heat insulation gasket.

As a further improvement of an embodiment of the present invention, the tip further includes a fixing ring sleeved on the tip body, the fixing ring and the heat insulation gasket are located at two sides of the annular protrusion, and an outer peripheral surface of the fixing ring is coplanar with an outer peripheral surface of the annular protrusion.

As a further improvement of an embodiment of the invention, a groove is arranged in the template, the pouring gate is arranged on the bottom wall of the groove, one end of the nozzle tip body with a liquid outlet stretches into the groove and is matched with the pouring gate, the groove is provided with a stepped side wall, the stepped side wall comprises a small-diameter section and a large-diameter section which are sequentially arranged along the direction far away from the pouring gate, and the peripheral surface of the part of the nozzle tip body stretching into the small-diameter section is matched with the inner wall of the small-diameter section.

As a further improvement of an embodiment of the present invention, the outer circumferential surface of the annular protrusion and the fixing ring are matched with the inner wall of the large-diameter section.

As a further improvement of an embodiment of the present invention, the hot nozzle main body includes a head body and a root body that are butted in a first direction, the head body has a first branch flow channel, the root body is provided with a second branch flow channel, and the first branch flow channel and the second branch flow channel are butted in the first direction to form the first flow channel.

As a further improvement of an embodiment of the present invention, the thermal nozzle main body includes a fixing block, the fixing block includes a limiting portion and a connecting portion that are sleeved on the root portion main body, the connecting portion extends from the limiting portion to the head portion main body laterally to form an annular connecting wall, an inner thread is disposed on the inner side of the annular connecting wall, and an outer thread matched with the inner thread is disposed on the outer circumferential surface of the head portion main body.

As a further improvement of an embodiment of the present invention, the root body is further sleeved with a compression ring, and in the first direction, the compression ring is located between the head body and the limiting portion and abuts against the limiting portion.

As a further improvement of an embodiment of the present invention, in the first direction, an annular mounting groove is provided at a position between the limit portion and the head portion body in the circumferential direction of the root portion body, and the compression ring is provided in the annular mounting groove.

As a further improvement of an embodiment of the present invention, a mounting groove is provided at an end of the head body abutting against the root body, and in the first direction, an end of the root body near the head body is inserted into the mounting groove.

As a further improvement of an embodiment of the present invention, the hot nozzle body further includes a copper bush heater that is sleeved on the root body in the circumferential direction.

As a further improvement of an embodiment of the present invention, the hot runner system includes a flow dividing plate having a flow dividing plate flow channel, the hot nozzle assembly includes a second elastic ring sleeved on the outer periphery of the hot nozzle main body, one end of the second elastic ring abuts against the die plate in the first direction, and the other end abuts against the flow dividing plate, so that the flow dividing plate flow channel is communicated with the first flow channel.

Compared with the prior art, the invention has the beneficial effects that:

the mouth point extends along the second direction, and the liquid outlet cooperation sets up in the runner inboard of template, and hot mouth main part sets up along first direction, in the second direction, the one end butt of first elastic ring in the template, the other end will the mouth point butt is in hot mouth main part, replaces threaded connection through first elastic ring butt, can realize mouth point and hot mouth main part mutually supporting fast, also very convenient when disassembling.

Drawings

FIG. 1 is a schematic view of a partial cross-sectional structure of a thermal nozzle system according to an embodiment of the present invention;

FIG. 2 is an enlarged view of M in FIG. 1;

FIG. 3 is a schematic view of the structure of FIG. 2 with the tip removed;

FIG. 4 is a schematic view of a tip structure according to another embodiment of the present invention;

FIG. 5 is a schematic view of the structure of the nozzle body of FIG. 1;

FIG. 6 is an enlarged view of N in FIG. 5;

FIG. 7 is a schematic view of the root body of FIG. 5;

FIG. 8 is a schematic view of the head body of FIG. 5;

fig. 9 is a cross-sectional view taken along the direction A-A in fig. 5.

The above description of the drawings includes the following reference numerals:

1. a template; 11. a groove; 111. a small diameter section; 112. a large diameter section; 12. pouring gate; 13. a receiving groove;

21. a hot nozzle body; 211. a first flow passage; 212. a head body; 2121. a first branch flow passage; 2122. an abutment surface; 2123. a guide slope; 2124. a mounting groove; 213. a root body; 2131. a second branch flow passage; 2132. an annular mounting groove; 214. a fixed block; 2141. a limit part; 2142. a connection part; 2143. a handle portion; 215. a clamp ring; 216. copper sleeve heater; 22. a mouth tip; 221. a second flow passage; 222. a heat insulating gasket; 223. 423, a tip body; 2231. 4231, a liquid outlet; 2232. 4232, annular protuberance; 225. 425, a fixing ring; 23. a first elastic ring; 24. a second elastic ring; 25. a hot nozzle positioning ring; 251. an abutting portion; 252. a support part; 26; an elastic ring positioning bushing; 261. an outer peripheral portion; 262. an outer extension; 27. an anti-rotation sheet; 28. a stop pin;

3. a diverter plate; 31. a flow dividing channel; a1, a first direction; a2, a second direction.

Detailed Description

It should be noted that, in the case of no conflict, the embodiments and features in the embodiments may be combined with each other. The invention will be described in detail below with reference to the drawings in connection with embodiments.

It is noted that all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs unless otherwise indicated.

In the present invention, unless otherwise indicated, terms of orientation such as "upper, lower, top, bottom" are used generally with respect to the orientation shown in the drawings or with respect to the component itself in the vertical, upright or gravitational direction; also, for ease of understanding and description, "inner and outer" refers to inner and outer relative to the profile of each component itself, but the above-mentioned orientation terms are not intended to limit the present invention.

In order to solve the problem that in the prior art, when a plurality of nozzle tips are connected to the side wall of a flow dividing nozzle in advance in a threaded connection mode, the nozzle tips are difficult to install when being installed in a die; in addition, when the tip is detached from the nozzle, there is a problem that the detachment is difficult. In order to solve the foregoing problems, the present invention provides a hot runner system.

As shown in fig. 1-9, an embodiment of the present invention provides a hot runner system, including a mold plate 1 and a hot nozzle assembly, where the hot nozzle assembly includes a hot nozzle body 21 at least partially located in the mold plate 1, a nozzle tip 22 disposed in the mold plate, and a first elastic ring 23, where the hot nozzle body 21 extends along a first direction and has a first flow channel 211, and the nozzle tip 22 extends along a second direction and has a second flow channel 221, where the first direction and the second direction form an included angle, a liquid outlet 2231 of the nozzle tip 22 is disposed inside a pouring gate 12 of the mold plate 1 and is in communication with the second flow channel 221, and in the second direction, one end of the first elastic ring 23 abuts against the mold plate 1, and the other end abuts the nozzle tip 22 against the hot nozzle body 21, so that the first flow channel 211 is in communication with the second flow channel 221.

According to the above arrangement, the tip 22 extends along the second direction, the liquid outlet 2231 is cooperatively disposed inside the gate 12 of the mold plate 1 and is communicated with the second flow channel 221, the hot nozzle body 21 is disposed along the first direction, one end of the first elastic ring 23 abuts against the mold plate 1, the other end of the first elastic ring abuts against the tip 22 against the hot nozzle body 21, and the tip 22 can be quickly matched with the hot nozzle body 21 by replacing threaded connection with the first elastic ring, which is very convenient in disassembly.

In this embodiment, the direction A1 is the first direction, the direction A2 is the second direction, and when in specific installation, the user may first extend the nozzle tip 22 along the direction A2 to be disposed inside the gate 12 of the mold plate 1, and then extend the hot nozzle body 21 along the direction A1, so that the hot nozzle body 21 and the nozzle tip 22 can be abutted against each other.

It can be appreciated that when the A2 direction and the A1 direction form a certain angle, the nozzle tip 22 can output injection molding liquid upwards from the side of the hot nozzle body 21, so as to meet the requirements of different injection molding products. As a preferred embodiment, in this embodiment, the direction of A1 is perpendicular to the direction of A2.

Further, as shown in fig. 1 and 2, the hot nozzle body 21 has an abutment surface 2122 abutting against the hot nozzle 22, and preferably, a guide inclined surface 2123 connected to the abutment surface 2122 may be provided on the hot nozzle body 21, and the guide inclined surface 2123 extends along the abutment surface on a side away from the flow dividing plate 3 in the A1 direction, away from the flow dividing plate 3 and toward the inside of the hot nozzle body 21, and when the user presses the hot nozzle body 21 toward the nozzle tip 22, the nozzle tip 22 can be abutted against the abutment surface 2122 through the guide inclined surface 2123.

Further, the tip 22 includes a heat insulating gasket 222, and in the A2 direction, the heat insulating gasket 222 is located between the first elastic ring 23 and the die plate 1, so that heat dissipation to the die plate 1 can be blocked.

It will be appreciated that one end of the first elastic ring 23 abuts against the die plate 1 via a heat insulating washer 222, and the other end abuts against the tip 22. The first elastic ring 23 may be a compression spring ring or an elastic washer, which is not limited in the present invention.

Further, the tip 22 includes a tip body 223, where the tip body has the liquid outlet 2241 and the second flow channel 221, and the liquid outlet 2241 is in communication with the second flow channel 221. The tip body 223 is circumferentially provided with an annular protrusion 2232, the heat insulation gasket 222 and the first elastic ring 23 are sleeved on the tip body 223, the heat insulation gasket 222 and the first elastic ring 23 are located between the annular protrusion 2232 and the template 1 in the second direction A2, and two ends of the first elastic ring 23 are respectively abutted against the annular protrusion 2232 and the heat insulation gasket 222 in the direction A2. The annular protrusion 2232 plays a certain role in stabilizing the first elastic ring 23, and the first elastic ring 23 is not easy to deviate when being abutted against the annular protrusion 2232.

Further, the tip 22 further includes a fixing ring 225 sleeved on the tip body 223, the fixing ring 225 and the heat insulation gasket 222 are located at two sides of the annular protrusion 2232, and an outer circumferential surface of the fixing ring 225 is coplanar with an outer circumferential surface of the annular protrusion 2232. The purpose of the retainer 225 is to perform a positioning function when the tip 22 is placed inside the gate 12 of the mold plate 1.

Further, the mold plate 1 has a groove 11 for injecting liquid, the injection gate 12 is disposed on a bottom wall of the groove, and the end of the nozzle core body 223 having the liquid outlet 2231 extends into the groove 11 and cooperates with the injection gate 12, so that the liquid outlet 2231 is located at an inner side of the injection gate 12.

The groove 11 is provided with a stepped side wall, the stepped side wall comprises a small-diameter section 111 and a large-diameter section 112 which are sequentially arranged along the direction away from the pouring gate, and the peripheral surface of the part of the nozzle tip body 223, which is provided with a liquid outlet, of one end of the nozzle tip body stretches into the small-diameter section 111 is matched with the inner wall of the small-diameter section, so that leakage of injection molding liquid can be avoided.

Further, the outer circumferential surfaces of the annular protrusion 2232 and the retainer ring 225 are matched with the inner wall of the large-diameter section 112, so that the large-diameter section 112 can perform a limiting function to limit the nozzle tip 22 at the position when the nozzle tip 22 is pre-arranged inside the gate 12 of the mold plate 1, thereby completing the pre-installation of the nozzle tip 22.

In some embodiments, the arrangement of the tip 22 is slightly different from the arrangement described above, as shown in fig. 4, an annular protrusion 4232 is disposed on the outer peripheral surface of the tip body 423 near the middle, and the liquid outlet 4231 and the second flow channel 221 are both extended along the A2 direction, and one end of the tip body 423 is a liquid outlet inclined plane forming an included angle with the A2 direction, where the included angle between the liquid outlet inclined plane and the A2 direction is an acute angle. One end of the liquid outlet 4231 is located on the liquid outlet slope, and the other end is in butt joint with the second flow channel 221 in the A2 direction, so that the injection molding liquid flowing out speed in the second flow channel 221 can be improved.

In this embodiment, the fixing ring 425 is located at one side of the annular protrusion 4232, and it should be noted that the first elastic ring 23 and the heat insulation gasket 222 are sleeved on the circumference of the tip body 42 and located at two sides of the annular protrusion 4232 with the fixing ring 425. The outer peripheral surface of the tip body 423 is provided with an annular groove at the side, a fixing ring 425 is sleeved in the annular groove, and the outer peripheral surface of the fixing ring 425 and the outer peripheral surface of the annular protrusion are arranged in a coplanar manner. When so arranged, the retainer ring 425 is snapped into the annular groove, and can maintain a degree of stability.

As shown in fig. 5 and 6, the nozzle body 21 includes a head body 212 and a root body 213 that are abutted in the A1 direction, the head body has a first branch flow passage 2121, the root body is provided with a second branch flow passage 2131, and the first branch flow passage 2121 and the second branch flow passage 2131 are abutted in the A1 direction to form the first flow passage 211.

Further, the hot nozzle main body 21 further includes a fixing block 214, the fixing block 214 includes a limiting portion 2141 and a connecting portion 2142 sleeved on the root portion main body, the connecting portion 2142 extends laterally from the limiting portion toward one side of the head portion main body to form an annular connecting wall, an inner thread is disposed on the inner side of the annular connecting wall, and an outer thread matched with the inner thread is disposed on the outer circumferential surface of the head portion main body 212.

At the time of specific installation, the annular connecting wall is screwed to the external screw thread of the head body 212 by the internal screw thread, and the annular connecting wall and the head body are connected. It will be appreciated that the external thread on the head body 212 is located on the side of its outer peripheral surface adjacent the root body 213.

Optionally, the fixing block 214 may further include a handle portion 2143 disposed on an outer peripheral surface of the annular connecting wall, so that the fixing block 214 can be held on the handle portion 2143 with less effort when the fixing block 214 is screwed on the head body 212.

Preferably, the root body 213 is further sleeved with a compression ring 215, and in the first direction, the compression ring 215 is located between the head body 212 and the limiting portion 2141 and abuts against the limiting portion 2141. The connecting portion 2142 of the fixing block 214 is sleeved on the head body 212, and the limiting portion 2141 abuts against the compression ring 215 sleeved on the root body 213, so that the head body 212 abuts against the root body 213, and abutting in the first direction is achieved.

Further, in the first direction, an annular mounting groove 2132 is provided at a position between the stopper 2141 and the head body 212 in the circumferential direction of the root body 213, and the clamp ring 215 is provided in the annular mounting groove 2132. This arrangement prevents movement of clamp ring 215 relative to root body 213. The root body 213 can be pressed against the head body 212 better by the pressing ring 215.

Further, a mounting groove 2124 is provided at an end of the head body 212 abutting against the root body 213, and in the first direction, an end of the root body 213 close to the head body 212 is inserted into the mounting groove 2124. The mounting groove 2124 plays a certain limiting role, so that the butt joint between the root body 213 and the head body 212 can be more accurate.

Further, the nozzle body 21 further includes a copper bush heater 216 which is sleeved on the root body 213 in the circumferential direction. The injection liquid in the first flow passage 211 inside the nozzle body 21 can be heated by the copper bush heater.

As shown in fig. 1, the hot runner system further includes a splitter plate 3 having a splitter plate runner 31, the hot nozzle assembly includes a second elastic ring 24, the second elastic ring 24 is sleeved on the outer periphery of the hot nozzle body 21, in the A1 direction, one end of the second elastic ring 24 abuts against the die plate 1, and the other end abuts against the hot nozzle body 21 against the splitter plate 3, so that the splitter plate runner 31 is communicated with the first runner 211.

Specifically, as shown in fig. 1, the hot nozzle assembly further includes a hot nozzle positioning ring 25, and in the A1 direction, the hot nozzle positioning ring 25 is located between the die plate 1 and the second elastic ring 24. The template 1 is provided with a containing groove 13, and the hot nozzle positioning ring 25 is positioned in the containing groove 13.

Specifically, in the present embodiment, the hot nozzle retainer 25 includes the support portion 252 and the abutting portion 251 extending from the support portion 252 to the inner ring of the support portion 252, the support portion 252 abuts against the die plate 1 in the A1 direction, and the abutting portion 251 abuts against the outer periphery of the hot nozzle main body 21 in the direction perpendicular to the A1 direction. The abutment 251 extends inwardly from the end of the support 252 adjacent the splitter plate 3. The hot nozzle positioning ring 25 positions the hot nozzle main body 21 and the die plate 1.

In the direction perpendicular to A1, a part of the support portion 252 abuts against the die plate 1, and a certain gap is provided between the other part of the support portion 252 and the die plate 1. Specifically, in the direction perpendicular to A1, the outer periphery of the end of the support portion 252 away from the flow dividing plate 3 abuts against the side edge of the accommodating groove 13, and a certain gap is provided between the other portion of the support portion 252 and the side edge of the accommodating groove 13, so that heat on the hot nozzle main body 21 is reduced from being transferred to the die plate 1 through the hot nozzle positioning ring 25.

The nozzle assembly further comprises an elastic ring positioning bushing 26, wherein the elastic ring positioning bushing 26 comprises a peripheral portion 261 surrounding the periphery of the nozzle body 21, and the peripheral portion 261 is located between the nozzle body 21 and the second elastic ring 24 in the direction perpendicular to the direction A1 so as to press the nozzle body 21 against the flow dividing plate 3.

Further, in the direction perpendicular to the A1 direction, the outer peripheral portion 261 is also located between the abutting portion 251 and the nozzle body 21, and the abutting portion 251 abuts against the outer peripheral portion 261.

The elastic ring positioning bushing 26 further includes an outer extension 262 extending outwardly from the outer peripheral portion 261, the outer extension 262 being located between the second elastic ring 24 and the nozzle body 21 in the upward direction A1. Further, the outer extension 262 extends outwardly from an end of the peripheral portion 261 near the flow dividing plate 3.

The elastic ring positioning bushing 26 provided in this embodiment greatly reduces heat loss at the upper end of the hot nozzle main body 21, and ensures temperature balance in the hot nozzle main body 21.

The thermal nozzle assembly further comprises an anti-rotation structure 27 arranged between the die plate 1 and the thermal nozzle body 21, which anti-rotation structure is capable of preventing the thermal nozzle body 21 from rotating around its axial direction. Specifically, in this embodiment, the anti-rotation structure is sleeved on the hot nozzle main body 21 and is fixedly arranged relative to the hot nozzle main body 21. The anti-rotation structure 27 is provided with a rotation stop pin 28 in a penetrating way, and the template 1 is provided with a positioning groove matched with the rotation stop pin. The detent pin 28, in cooperation with the detent slot, can define the position of the hot nozzle body 21.

In summary, the following technical effects are achieved by the embodiments of the present invention:

the tip 22 extends along the second direction and sets up in the runner 12 inboard of template 1, and hot mouth main part 21 sets up along the first direction, the one end butt of first elastic ring 23 in template 1, the other end will tip 22 butt is in hot mouth main part 21, replaces threaded connection through the butt of first elastic ring, can realize tip 22 and hot mouth main part 21 to cooperate fast, also very convenient when disassembling.

It will be apparent that the embodiments described above are merely some, but not all, embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present invention without making any inventive effort, shall fall within the scope of the present invention.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments in accordance with the present application. As used herein, the singular is also intended to include the plural unless the context clearly indicates otherwise, and furthermore, it is to be understood that the terms "comprises" and/or "comprising" when used in this specification are taken to specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof.

It should be noted that the terms "first," "second," and the like in the description and claims of the present application and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that embodiments of the present application described herein may be implemented in sequences other than those illustrated or described herein.

The above description is only of the preferred embodiments of the present invention and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (13)

1. The utility model provides a hot runner system, its characterized in that includes template (1) and hot mouth subassembly, hot mouth subassembly includes hot mouth main part (21) that are located at least partially in template (1), sets up in the template tip (22) and first elastic ring (23), hot mouth main part (21) are along first direction extension and have first runner (211), tip (22) are along second direction extension and have second runner (221), wherein, first direction and second direction become certain contained angle, liquid outlet (2231, 4231) cooperation setting in template (1) annotate runner (12) inboard and with second runner (221) are linked together, in the second direction, one end butt of first elastic ring (23) in template (1), the other end will tip (22) butt on hot mouth main part (21) so that first runner (211) link up with second runner (221).

2. The hot runner system according to claim 1, characterized in that the tip (22) comprises a heat insulating gasket (222), the heat insulating gasket (222) being located between the first elastic ring (23) and the die plate (1) in the second direction.

3. The hot runner system according to claim 2, characterized in that the tip (22) comprises a tip body (223, 423) provided with annular protrusions (2232, 4232) in the circumferential direction, the heat insulating gasket (222) and the first elastic ring (23) are sleeved on the tip body (223, 423), the heat insulating gasket (222) and the first elastic ring (23) are located between the annular protrusions (2232, 4232) and the template (1) in the second direction, and two ends of the first elastic ring (23) are abutted against the annular protrusions (2232, 4232) and the heat insulating gasket (222).

4. A hot runner system according to claim 3, characterized in that the tip (22) further comprises a fixing ring (225, 425) fitted over the tip body (223, 423), the fixing ring (225, 425) and the heat insulating gasket (222) being located on both sides of the annular protrusion (2232, 4232), the outer circumferential surface of the fixing ring (225, 425) being coplanar with the outer circumferential surface of the annular protrusion (2232, 4232).

5. The hot runner system according to claim 4, wherein a groove (11) is provided in the mold plate (1), the pouring gate (12) is provided on a bottom wall of the groove, one end of the nozzle tip body (223, 423) having a liquid outlet extends into the groove (11) and cooperates with the pouring gate (12), the groove (11) has a stepped side wall including a small diameter section (111) and a large diameter section (112) which are sequentially provided in a direction away from the pouring gate, and a peripheral surface of a portion of the nozzle tip body (223, 423) extending into the small diameter section (111) cooperates with an inner wall of the small diameter section.

6. The hot runner system according to claim 5, wherein the outer circumferential surfaces of the annular protrusions (2232, 4232) and the retainer rings (225, 425) mate with the inner wall of the large diameter section (112).

7. The hot runner system according to claim 1, wherein the hot nozzle body (21) comprises a head body (212) and a root body (213) that are butted in a first direction, the head body having a first branch runner (2121), the root body having a second branch runner (2131) provided thereon, the first branch runner (2121) being butted with the second branch runner (2131) in the first direction to form the first runner (211).

8. The hot runner system according to claim 7, wherein the hot nozzle main body (21) comprises a fixing block (214), the fixing block (214) comprises a limiting portion (2141) sleeved on the circumference of the root body and a connecting portion (2142), the connecting portion (2142) extends laterally from the limiting portion towards the head body to form an annular connecting wall, an inner thread is arranged on the inner side of the annular connecting wall, and an outer circumferential surface of the head body (212) is provided with an outer thread matched with the inner thread.

9. The hot runner system according to claim 8, wherein the root body (213) is further sleeved with a clamp ring (215), and in the first direction, the clamp ring (215) is located between the head body (212) and the stopper portion (2141) and abuts against the stopper portion (2141).

10. The hot runner system according to claim 9, characterized in that in the first direction, an annular mounting groove (2132) is provided in a position between the limit portion (2141) and the head body (212) in the circumferential direction of the root body (213), the compression ring (215) being provided in the annular mounting groove (2132).

11. The hot runner system according to claim 10, characterized in that a mounting groove (2124) is provided on an end of the head body (212) abutting against the root body (213), in the first direction an end of the root body (213) adjacent to the head body (212) being plugged into the mounting groove (2124).

12. The hot runner system according to claim 7, wherein the hot nozzle body (21) further comprises a copper sleeve heater (216) sleeved in the circumferential direction of the root body (213).

13. The hot runner system according to claim 1, characterized in that the hot runner system comprises a splitter plate (3) with a splitter plate flow channel (31), the hot nozzle assembly comprises a second elastic ring (24), the second elastic ring (24) is sleeved on the periphery of the hot nozzle main body (21), one end of the second elastic ring (24) is abutted against the template (1) in the first direction, and the other end is abutted against the splitter plate (3) so that the splitter plate flow channel (31) is communicated with the first flow channel (211).