Hot runner system

Abstract

The present invention provides a hot runner system, including a template and a hot nozzle assembly, wherein the hot nozzle assembly includes a hot nozzle body at least partially located within the template, a nozzle tip disposed within the template, and a first elastic ring, wherein the hot nozzle body extends along a first direction and has a first flow channel, and the nozzle tip extends along a second direction and has a second flow channel, wherein the first direction and the second direction form a certain angle, and the liquid outlet of the nozzle tip is cooperatively disposed inside the injection gate of the template and is connected to the second flow channel. In the second direction, one end of the first elastic ring abuts the template, and the other end abuts the nozzle tip against the hot nozzle body, so that the first flow channel and the second flow channel are interlinked. The present invention solves the problem in the prior art of difficulty in disassembling the nozzle tip from the diverter nozzle.

Description

Technical Field

[0001] The present invention relates to the field of hot runner molds, and in particular to a hot runner system. Background Art

[0002] At present, the hot runner system of the injection mold mainly consists of molten glue coming out from the nozzle of the injection molding machine, being diverted through the diverter plate, and transported to each hot nozzle, and then injected into the injection gate of the mold through the liquid outlet of the hot nozzle core.

[0003] For some special products, it is necessary to feed glue into the mold cavity from the side of the nozzle body. In the existing technology, one end of the nozzle body is connected to the manifold via a flange, and the other end of the nozzle body is connected to the manifold nozzle. Multiple nozzle tips are installed on the side wall of the manifold nozzle. The multiple nozzle tips are connected to the manifold nozzle via threaded connections and fixed with a pressure cap, thus achieving lateral glue feeding.

[0004] However, some injection molded products cannot have their side glue ports located close to the mold opening. When multiple nozzle tips are pre-threaded onto the sidewall of the diverter nozzle, installation into the mold becomes difficult. Removing the nozzle tips from the diverter nozzle is also a hassle, and the increased frequency of removal can lead to a decrease in the seal between the nozzle tip and the diverter nozzle. Summary of the Invention

[0005] The object of the present invention is to provide a hot runner system to solve the problem in the prior art that multiple nozzle tips are pre-connected to the side wall of the diverter nozzle by means of threaded connection and then installed in the mold, which is very difficult to install, and there is also difficulty in disassembling the nozzle tips from the diverter nozzle.

[0006] In order to achieve the above-mentioned purpose of the present invention, one embodiment of the present invention provides a hot runner system, which includes a template and a hot nozzle assembly, the hot nozzle assembly includes a hot nozzle body at least partially located in the template, a nozzle tip and a first elastic ring arranged in the template, the hot nozzle body extends along a first direction and has a first runner, the nozzle tip extends along a second direction and has a second runner, wherein the first direction and the second direction form a certain angle, the liquid outlet of the nozzle tip is cooperated and arranged on the inner side of the injection gate of the template and is connected to the second runner, in the second direction, one end of the first elastic ring abuts the template, and the other end abuts the nozzle tip on the hot nozzle body, so that the first runner and the second runner are connected.

[0007] As a further improvement of an embodiment of the present invention, the nozzle tip includes a thermal insulation gasket, and in the second direction, the thermal insulation gasket is located between the first elastic ring and the template.

[0008] As a further improvement of one embodiment of the present invention, the nozzle tip includes a nozzle tip body, an annular protrusion is provided on the circumference of the nozzle tip body, the thermal insulation gasket and the first elastic ring are mounted on the nozzle tip body, and in the second direction, the thermal insulation gasket and the first elastic ring are located between the annular protrusion and the template, and the two ends of the first elastic ring are in contact with the annular protrusion and the thermal insulation gasket.

[0009] As a further improvement of one embodiment of the present invention, the nozzle tip also includes a fixing ring mounted on the nozzle tip body, the fixing ring and the thermal insulation gasket are located on both sides of the annular protrusion, and the outer peripheral surface of the fixing ring is coplanar with the outer peripheral surface of the annular protrusion.

[0010] As a further improvement of one embodiment of the present invention, a groove is provided in the template, the injection gate is provided on the bottom wall of the groove, the nozzle tip body has an end with a liquid outlet extending into the groove and cooperating with the injection gate, the groove has a stepped side wall, and the stepped side wall includes a small diameter section and a large diameter section arranged in sequence in a direction away from the injection gate, and the circumferential surface of the part of the nozzle tip body extending into the small diameter section cooperates with the inner wall of the small diameter section.

[0011] As a further improvement of an embodiment of the present invention, the outer circumferential surface of the annular protrusion and the fixing ring cooperate with the inner wall of the large-diameter section.

[0012] As a further improvement of one embodiment of the present invention, the hot nozzle body includes a head body and a root body connected to each other in a first direction, the head body has a first branch channel, and the root body is provided with a second branch channel, and the first branch channel and the second branch channel are connected to each other in the first direction to form the first channel.

[0013] As a further improvement of one embodiment of the present invention, the hot nozzle body includes a fixed block, the fixed block includes a limiting portion and a connecting portion which are sleeved on the circumference of the root body, the connecting portion extends laterally from the limiting portion toward the head body to form an annular connecting wall, the inner side of the annular connecting wall is provided with an internal thread, and the outer peripheral surface of the head body is provided with an external thread matching the internal thread.

[0014] As a further improvement of an embodiment of the present invention, a clamping ring is further sleeved on the root body, and in the first direction, the clamping ring is located between the head body and the limiting portion and abuts against the limiting portion.

[0015] As a further improvement of an embodiment of the present invention, in the first direction, an annular mounting groove is provided on the circumference of the root body between the limiting portion and the head body, and the clamping ring is arranged in the annular mounting groove.

[0016] As a further improvement of an embodiment of the present invention, a mounting groove is provided on one end of the head body that is opposite to the root body, and in the first direction, one end of the root body close to the head body is inserted into the mounting groove.

[0017] As a further improvement of an embodiment of the present invention, the hot nozzle body further includes a copper sleeve heater sleeved on the circumference of the root body.

[0018] As a further improvement of one embodiment of the present invention, the hot runner system includes a diverter plate having a diverter plate flow channel, and the hot nozzle assembly includes a second elastic ring, which is sleeved on the outer periphery of the hot nozzle body. In the first direction, one end of the second elastic ring abuts against the template, and the other end abuts the hot nozzle body against the diverter plate, so that the diverter plate flow channel is connected with the first flow channel.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] The nozzle tip extends along the second direction, and the liquid outlet is arranged on the inner side of the gate of the template. The hot nozzle body is arranged along the first direction. In the second direction, one end of the first elastic ring abuts the template, and the other end abuts the nozzle tip against the hot nozzle body. The abutment of the first elastic ring replaces the threaded connection, which can quickly realize the cooperation between the nozzle tip and the hot nozzle body, and is also very convenient when disassembling. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 A schematic diagram of a partial cross-sectional structure of a hot nozzle system in one embodiment of the present invention;

[0022] Figure 2 for Figure 1 Enlarged view of the M in the middle;

[0023] Figure 3 for Figure 2 Schematic diagram of the structure after removing the tip of the mouth;

[0024] Figure 4 A schematic structural diagram of the tip of the mouth in another embodiment of the present invention;

[0025] Figure 5 for Figure 1 Schematic diagram of the structure of the hot nozzle body;

[0026] Figure 6 for Figure 5 Enlarged view of point N in the middle;

[0027] Figure 7 for Figure 5 Schematic diagram of the structure of the middle root body;

[0028] Figure 8 for Figure 5 Schematic diagram of the structure of the middle head body;

[0029] Figure 9 for Figure 5 Cross-section view in the AA direction.

[0030] The above description of the drawings includes the following reference numerals:

[0031] 1. Template; 11. Groove; 111. Small diameter section; 112. Large diameter section; 12. Injection gate; 13. Receiving groove;

[0032] 21. Hot nozzle body; 211. First flow channel; 212. Head body; 2121. First branch flow channel; 2122. Abutment surface; 2123. Guide slope; 2124. Mounting groove; 213. Root body; 2131. Second branch flow channel; 2132. Annular mounting groove; 214. Fixing block; 2141. Limiting portion; 2142. Connecting portion; 2143. Handle; 215. Clamping ring; 216. Copper sleeve heater; 22. Tip; 221, second flow channel; 222, thermal insulation gasket; 223, 423, nozzle body; 2231, 4231, liquid outlet; 2232, 4232, annular protrusion; 225, 425, fixing ring; 23, first elastic ring; 24, second elastic ring; 25, nozzle positioning ring; 251, abutment portion; 252, support portion; 26, elastic ring positioning bushing; 261, outer peripheral portion; 262, outer extension portion; 27, anti-rotation plate; 28, stop pin;

[0033] 3. Diverter plate; 31. Diverter channel; A1, first direction; A2, second direction. DETAILED DESCRIPTION

[0034] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments in this application can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0035] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meaning as commonly understood by ordinary technicians in the technical field to which this application belongs.

[0036] In the present invention, unless otherwise specified, the directional words used, such as "up, down, top, bottom", usually refer to the directions shown in the drawings, or to the components themselves in the vertical, perpendicular or gravity direction; similarly, for ease of understanding and description, "inside and outside" refer to the inside and outside relative to the outline of each component itself, but the above directional words are not used to limit the present invention.

[0037] The present invention provides a hot runner system to address the difficulties encountered in prior art where multiple nozzle tips are pre-threaded onto the sidewall of a manifold nozzle and then installed into a mold. Furthermore, the nozzle tips are difficult to remove from the manifold nozzle.

[0038] like Figure 1-9 As shown, a hot runner system provided by one embodiment of the present invention includes a template 1 and a hot nozzle assembly, the hot nozzle assembly includes a hot nozzle body 21 at least partially located in the template 1, a nozzle tip 22 and a first elastic ring 23 arranged in the template, the hot nozzle body 21 extends along a first direction and has a first flow channel 211, the nozzle tip 22 extends along a second direction and has a second flow channel 221, wherein the first direction and the second direction form a certain angle, the liquid outlet 2231 of the nozzle tip 22 is cooperated and arranged on the inner side of the injection gate 12 of the template 1 and is connected to the second flow channel 221, in the second direction, one end of the first elastic ring 23 abuts the template 1, and the other end abuts the nozzle tip 22 against the hot nozzle body 21, so that the first flow channel 211 and the second flow channel 221 are connected.

[0039] According to the above-mentioned setting method, the nozzle tip 22 is extended along the second direction, the liquid outlet 2231 is arranged on the inner side of the gate 12 of the template 1 and is connected to the second runner 221, and the hot nozzle body 21 is arranged along the first direction. One end of the first elastic ring 23 abuts the template 1, and the other end abuts the nozzle tip 22 against the hot nozzle body 21. The first elastic ring abuts instead of the threaded connection, which can quickly realize the matching of the nozzle tip 22 and the hot nozzle body 21, and is also very convenient when disassembling.

[0040] In this embodiment, direction A1 is the first direction and direction A2 is the second direction. During the specific installation, the user can first extend the nozzle tip 22 along direction A2 to the inner side of the gate 12 of the template 1, and then extend the hot nozzle body 21 along direction A1 so that the hot nozzle body 21 can abut against each other with the nozzle tip 22.

[0041] It is understood that when the direction A2 is set at a certain angle to the direction A1, the nozzle tip 22 can output the injection liquid in the lateral direction of the hot nozzle body 21 to meet the needs of different injection molded products. As a preferred embodiment, in this embodiment, the direction A1 is perpendicular to the direction A2.

[0042] Further, if Figure 1,2, the hot nozzle body 21 has an abutting surface 2122 abutting against the hot nozzle 22. Preferably, a guide slope 2123 connected to the abutting surface 2122 can be provided on the hot nozzle body 21. The guide slope 2123 extends along the side of the aforementioned abutting surface away from the diverter plate 3 in the A1 direction, away from the diverter plate 3 and toward the inside of the hot nozzle body 21. When the user presses the hot nozzle body 21 toward the nozzle tip 22, the nozzle tip 22 can be abutted against the abutting surface 2122 through the guide slope 2123.

[0043] Furthermore, the nozzle tip 22 includes a heat-insulating gasket 222 . In the A2 direction, the heat-insulating gasket 222 is located between the first elastic ring 23 and the template 1 , and can prevent heat from being dissipated to the template 1 .

[0044] It is understandable that one end of the first elastic ring 23 abuts against the template 1 through the heat insulating washer 222, and the other end abuts against the nozzle tip 22. The first elastic ring 23 can be a compression spring ring or an elastic washer, which is not limited in the present invention.

[0045] Furthermore, the nozzle tip 22 includes a nozzle tip body 223, which has the liquid outlet 2241 and the second flow channel 221. The liquid outlet 2241 is connected to the second flow channel 221. An annular protrusion 2232 is provided around the nozzle tip body 223. The thermal insulation gasket 222 and the first elastic ring 23 are sleeved on the nozzle tip body 223. In the second direction A2, the thermal insulation gasket 222 and the first elastic ring 23 are located between the annular protrusion 2232 and the template 1. In this A2 direction, the two ends of the first elastic ring 23 respectively abut the annular protrusion 2232 and the thermal insulation gasket 222. The provision of the annular protrusion 2232 stabilizes the first elastic ring 23 to a certain extent, making it less likely for the first elastic ring 23 to deviate when abutting against the annular protrusion 2232.

[0046] Furthermore, the nozzle tip 22 also includes a fixing ring 225 that is sleeved on the nozzle tip body 223. The fixing ring 225 and the thermal insulation gasket 222 are located on both sides of the annular protrusion 2232, and the outer circumference of the fixing ring 225 is coplanar with the outer circumference of the annular protrusion 2232. The purpose of the fixing ring 225 is to play a positioning role when the nozzle tip 22 is pre-installed inside the gate 12 of the template 1.

[0047] Furthermore, the template 1 has a groove 11 for injecting liquid, and the injection gate 12 is arranged on the bottom wall of the groove. One end of the liquid outlet 2231 on the nozzle core body 223 extends into the groove 11 and cooperates with the injection gate 12 so that the liquid outlet 2231 is located on the inner side of the injection gate 12.

[0048] The groove 11 has a stepped side wall, which includes a small diameter section 111 and a large diameter section 112 arranged in sequence along the direction away from the injection gate. The nozzle tip body 223 has a peripheral surface of the portion of the liquid outlet extending into the small diameter section 111 and cooperating with the inner wall of the small diameter section, thereby avoiding leakage of the injection liquid.

[0049] Furthermore, the outer peripheral surface of the annular protrusion 2232 and the fixing ring 225 cooperate with the inner wall of the large diameter section 112. When the nozzle tip 22 is pre-set on the inner side of the gate 12 of the template 1, the large diameter section 112 can play a limiting role, limiting the nozzle tip 22 to this position, thereby completing the pre-installation of the nozzle tip 22.

[0050] In some embodiments, the configuration of the tip 22 is slightly different from the above configuration, such as Figure 4 As shown, an annular protrusion 4232 is provided near the center of the outer circumference of the nozzle body 423. The liquid outlet 4231 and the second flow channel 221 both extend along the A2 direction. One end of the nozzle body 423 forms a liquid outlet slope that forms an acute angle with the A2 direction. One end of the liquid outlet 4231 is located on the liquid outlet slope, while the other end interfaces with the second flow channel 221 along the A2 direction. This arrangement increases the velocity at which the injection liquid in the second flow channel 221 flows out.

[0051] In this embodiment, the retaining ring 425 is located on one side of the annular protrusion 4232. It should be noted that the first elastic ring 23 and the thermal insulation gasket 222 are arranged around the circumference of the nozzle tip body 42, and are located on both sides of the annular protrusion 4232 along with the retaining ring 425. The nozzle tip body 423 has an annular groove on its outer circumference, and the retaining ring 425 is positioned within the groove. The outer circumference of the retaining ring 425 is coplanar with the outer circumference of the annular protrusion. This arrangement allows the retaining ring 425 to be locked into the groove, maintaining a certain degree of stability.

[0052] It should be noted that if Figure 5 As shown in Figure 6, the hot nozzle body 21 includes a head body 212 and a root body 213 connected to each other in the A1 direction, the head body has a first branch channel 2121, and the root body is provided with a second branch channel 2131. The first branch channel 2121 and the second branch channel 2131 are connected to each other in the A1 direction to form the first channel 211.

[0053] Furthermore, the hot nozzle body 21 also includes a fixed block 214, and the fixed block 214 includes a limiting portion 2141 and a connecting portion 2142 which are arranged on the circumference of the root body. The connecting portion 2142 extends laterally from the limiting portion toward one side of the head body to form an annular connecting wall, and an internal thread is provided on the inner side of the annular connecting wall. The outer peripheral surface of the head body 212 is provided with an external thread that matches the internal thread.

[0054] During the specific installation, the annular connecting wall is screwed to the external thread of the head body 212 through the internal thread to connect the two. It can be understood that the external thread on the head body 212 is located on one side of its outer circumference close to the root body 213.

[0055] Optionally, the fixing block 214 may further include a handle portion 2143 provided on the outer peripheral surface of the annular connecting wall. When the fixing portion 214 is tightened onto the head body 212 , it is more labor-saving to hold the handle portion 2143 .

[0056] Preferably, a clamping ring 215 is further sleeved on the root body 213. In the first direction, the clamping 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 clamping ring 215 sleeved on the root body 213, thereby making the head body 212 and the root body 213 abut against each other, thereby achieving relative connection in the first direction.

[0057] Furthermore, in the first direction, an annular mounting groove 2132 is provided on the circumference of the root body 213 between the limiting portion 2141 and the head body 212, and the clamping ring 215 is disposed within the annular mounting groove 2132. This arrangement prevents the clamping ring 215 from moving relative to the root body 213, thereby enabling the clamping ring 215 to better clamp the root body 213 against the head body 212.

[0058] Furthermore, a mounting groove 2124 is provided on one end of the head body 212 that interfaces with the root body 213. In the first direction, the end of the root body 213 that is closer to the head body 212 is inserted into the mounting groove 2124. The mounting groove 2124 serves to limit the position of the root body 213 and ensures a more accurate interface between the head body 212 and the root body 213.

[0059] Furthermore, the hot nozzle body 21 further includes a copper sleeve heater 216 sleeved on the circumference of the root body 213. The copper sleeve heater can heat the injection liquid in the first flow channel 211 inside the hot nozzle body 21.

[0060] like Figure 1 As shown, the hot runner system also includes a diverter plate 3 having a diverter plate flow channel 31, and the hot nozzle assembly includes a second elastic ring 24, which 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 template 1, and the other end abuts the hot nozzle body 21 against the diverter plate 3, so that the diverter plate flow channel 31 is connected with the first flow channel 211.

[0061] Specifically, if Figure 1 As shown, the nozzle assembly further includes a nozzle positioning ring 25. In the A1 direction, the nozzle positioning ring 25 is located between the template 1 and the second elastic ring 24. The template 1 is provided with a receiving groove 13, and the nozzle positioning ring 25 is located in the receiving groove 13.

[0062] Specifically, in this embodiment, the nozzle positioning ring 25 includes a support portion 252 and an abutment portion 251 extending from the support portion 252 toward the inner circle of the support portion 252. In the direction A1, the support portion 252 abuts against the template 1. In a direction perpendicular to A1, the abutment portion 251 abuts against the outer periphery of the nozzle body 21. The abutment portion 251 extends inward from the end of the support portion 252 near the manifold 3. The nozzle positioning ring 25 positions the nozzle body 21 and the template 1.

[0063] In a direction perpendicular to A1, part of the support portion 252 abuts against the template 1, while another part of the support portion 252 has a certain gap with the template 1. Specifically, in a direction perpendicular to A1, the outer periphery of the end of the support portion 252 away from the manifold 3 abuts against the side of the receiving groove 13, while the other part of the support portion 252 has a certain gap with the side of the receiving groove 13. This arrangement reduces the heat from the hot nozzle body 21 being transferred to the template 1 through the hot nozzle positioning ring 25.

[0064] The hot nozzle assembly also includes an elastic ring positioning bushing 26, which includes an outer portion 261 surrounding the outer periphery of the hot nozzle body 21. In a direction perpendicular to the A1 direction, the outer portion 261 is located between the hot nozzle body 21 and the second elastic ring 24 to press the hot nozzle body 21 against the diverter plate 3.

[0065] Furthermore, in a direction perpendicular to the A1 direction, the peripheral portion 261 is also located between the abutting portion 251 and the hot nozzle body 21 , and the abutting portion 251 abuts against the peripheral portion 261 .

[0066] The elastic ring positioning bushing 26 further includes an outer extension portion 262 extending outward from the outer portion 261. In the direction A1 upward, the outer extension portion 262 is located between the second elastic ring 24 and the hot nozzle body 21. Furthermore, the outer extension portion 262 extends outward from one end of the outer portion 261 close to the diverter plate 3.

[0067] The elastic ring positioning bushing 26 provided in this embodiment greatly reduces the heat loss at the upper end of the hot nozzle body 21 , thereby ensuring a balanced temperature inside the hot nozzle body 21 .

[0068] The nozzle assembly also includes an anti-rotation structure 27 disposed between the template 1 and the nozzle body 21. This structure prevents the nozzle body 21 from rotating about its axis. Specifically, in this embodiment, the anti-rotation structure is sleeved onto the nozzle body 21 and fixed relative to the nozzle body 21. A stop pin 28 is provided on the anti-rotation structure 27, and a positioning groove is provided on the template 1 to mate with the stop pin. The stop pin 28 and the positioning groove together define the position of the nozzle body 21.

[0069] In summary, the embodiments of the present invention achieve the following technical effects:

[0070] The nozzle tip 22 extends along the second direction and is arranged on the inner side of the gate 12 of the template 1. The hot nozzle body 21 is arranged along the first direction. One end of the first elastic ring 23 abuts the template 1, and the other end abuts the nozzle tip 22 against the hot nozzle body 21. The abutment of the first elastic ring replaces the threaded connection, which can quickly realize the matching of the nozzle tip 22 and the hot nozzle body 21, and is also very convenient when disassembling.

[0071] Obviously, the embodiments described above are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts should fall within the scope of protection of the present invention.

[0072] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, tasks, devices, components and / or combinations thereof.

[0073] It should be noted that the terms "first," "second," and the like in the specification and claims of this application and the accompanying drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or precedence. It should be understood that the terms used in this manner are interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than that illustrated or described herein.

[0074] The foregoing description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention are intended to be within the scope of protection of the present invention.

Claims

1. A hot runner system, characterized in that: The invention comprises a template (1) and a hot nozzle assembly, wherein the hot nozzle assembly comprises a hot nozzle body (21) at least partially located in the template (1), a nozzle tip (22) arranged in the template, and a first elastic ring (23), wherein 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), wherein the first direction and the second direction form a certain angle, and the liquid outlet (2231, 4231) of the nozzle tip (22) is cooperatively arranged on the inner side of the injection gate (12) of the template (1) and is connected to the second flow channel (221), and in the second direction, one end of the first elastic ring (23) abuts against the template (1), and the other end abuts the nozzle tip (22) against the hot nozzle body (21), so that the first flow channel (211) and the second flow channel (221) are connected; The nozzle tip (22) includes a heat-insulating gasket (222), and in the second direction, the heat-insulating gasket (222) is located between the first elastic ring (23) and the template (1); The nozzle tip (22) includes a nozzle tip body (223, 423), an annular protrusion (2232, 4232) is provided on the circumference of the nozzle tip body, the thermal insulation gasket (222) and the first elastic ring (23) are sleeved on the nozzle tip body (223, 423), and in the second direction, the thermal insulation gasket (222) and the first elastic ring (23) are located between the annular protrusion (2232, 4232) and the template (1), and both ends of the first elastic ring (23) are in contact with the annular protrusion (2232, 4232) and the thermal insulation gasket (222); The hot nozzle body (21) comprises a head body (212) and a root body (213) connected to each other in a first direction, the head body having a first branch flow channel (2121), the root body (213) being provided with a second branch flow channel (2131), and the first branch flow channel (2121) and the second branch flow channel (2131) being connected to each other in the first direction to form the first flow channel (211).

2. The hot runner system according to claim 1, characterized in that: The nozzle tip (22) further comprises a fixing ring (225, 425) sleeved on the nozzle 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), and the outer peripheral surface of the fixing ring (225, 425) is coplanar with the outer peripheral surface of the annular protrusion (2232, 4232).

3. The hot runner system according to claim 2, characterized in that: A groove (11) is provided in the template (1), and the injection gate (12) is provided on the bottom wall of the groove. The nozzle tip body (223, 423) has an end with a liquid outlet extending into the groove (11) and cooperating with the injection gate (12). The groove (11) has a stepped side wall, and the stepped side wall includes a small diameter section (111) and a large diameter section (112) arranged in sequence in a direction away from the injection gate. The peripheral surface of the portion of the nozzle tip body (223, 423) extending into the small diameter section (111) cooperates with the inner wall of the small diameter section.

4. The hot runner system according to claim 3, characterized in that: The outer circumferential surfaces of the annular protrusion (2232, 4232) and the fixing ring (225, 425) match the inner wall of the large-diameter section (112).

5. The hot runner system according to claim 1, characterized in that: The hot nozzle body (21) includes a fixed block (214), and the fixed block (214) includes a limiting portion (2141) and a connecting portion (2142) which are sleeved on the circumference of the root body. The connecting portion (2142) extends laterally from the limiting portion toward the head body to form an annular connecting wall. An internal thread is provided on the inner side of the annular connecting wall, and an external thread matching the internal thread is provided on the outer peripheral surface of the head body (212).

6. The hot runner system according to claim 5, characterized in that: A clamping ring (215) is also sleeved on the root body (213). In the first direction, the clamping ring (215) is located between the head body (212) and the limiting portion (2141) and abuts against the limiting portion (2141).

7. The hot runner system according to claim 6, characterized in that: In the first direction, an annular mounting groove (2132) is provided at a position between the limiting portion (2141) and the head body (212) on the circumference of the root body (213), and the clamping ring (215) is arranged in the annular mounting groove (2132).

8. The hot runner system according to claim 7, characterized in that: An installation groove (2124) is provided on one end of the head body (212) that is connected to the root body (213). In the first direction, the end of the root body (213) close to the head body (212) is inserted into the installation groove (2124).

9. The hot runner system according to claim 1, characterized in that: The hot nozzle body (21) further comprises a copper sleeve heater (216) sleeved on the circumference of the root body (213).

10. The hot runner system according to claim 1, wherein: The hot runner system includes a manifold plate (3) having a manifold channel (31), and 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 a first direction, one end of the second elastic ring (24) abuts against the template (1), and the other end abuts the hot nozzle body (21) against the manifold plate (3), so that the manifold channel (31) and the first channel (211) are connected.

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