Adapter nozzle assembly and stack mold hot runner system

Abstract

The invention provides an adapter nozzle assembly and a stack mold hot runner system, and the adapter nozzle assembly comprises a first adapter nozzle which is provided with a first adapter runner and a first adapter port located at one end of the first adapter runner, and the first adapter nozzle further comprises a first plugging valve needle and a first driving structure, the first plugging valve needle is matched with the first driving structure to close or open the first adapter; a second switching flow channel and a second switching port located at one end of the second switching flow channel are formed in the second switching nozzle, and the second switching port is in butt joint with the first switching port so that the first switching flow channel can be communicated with the second switching flow channel; the second adapter nozzle further comprises a second plugging valve needle and a second driving structure for driving the second plugging valve needle, and the second plugging valve needle closes or opens the second adapter under the action of the second driving structure. And the first adapter nozzle and the second adapter nozzle can be respectively sealed with glue when the adapter nozzle assembly is disconnected.

Description

Technical Field

[0001] The present application relates to the field of hot runner technology, and in particular to a transfer nozzle assembly and a stack mold hot runner system provided with the transfer nozzle assembly. Background Art

[0002] In the hot runner system, in order to increase the output, a stacked hot runner system is designed. The stacked hot runner system has two sets of hot nozzles with opposite glue discharge directions, which respectively inject into the templates on the opposite sides to obtain double injection molded parts. However, due to the necessity of demoulding, when the mold close to the main nozzle is demoulded, the intermediate pipeline connecting the main nozzle and the hot nozzle must be disconnected, and there is a problem of difficulty in sealing glue when the intermediate pipeline is disconnected. Summary of the invention

[0003] The purpose of the present application is to provide a transfer nozzle assembly, which realizes effective sealing of the flow channel of the hot runner system during the demolding process by providing a first transfer nozzle and a second transfer nozzle with a sealing valve needle and a driving structure, thereby preventing leakage of rubber and ensuring the stability and operating efficiency of the system.

[0004] In order to achieve one of the above-mentioned purposes of the invention, an embodiment of the present application provides a stack mold hot runner system, comprising:

[0005] A first adapter nozzle, formed with a first adapter flow channel and a first adapter port located at one end of the first adapter flow channel, the first adapter nozzle also includes a first blocking valve needle and a first drive structure, the first blocking valve needle and the first drive structure cooperate to close or open the first adapter port;

[0006] The second adapter nozzle is formed with a second adapter channel and a second adapter interface located at one end of the second adapter channel, and the second adapter interface is docked with the first adapter interface so that the first adapter channel and the second adapter channel are connected; the second adapter nozzle also includes a second sealing valve needle and a second driving structure for driving the second sealing valve needle, and the second sealing valve needle closes or opens the second adapter interface under the action of the second driving structure.

[0007] In one embodiment of the present application, the first adapter nozzle also includes a first adapter nozzle body and a sealing nozzle, the first adapter interface is opened in the sealing nozzle, the first sealing valve needle is at least partially arranged in the first adapter flow channel, and the first driving structure includes a first elastic member with two ends abutting against the first adapter nozzle body and the sealing nozzle.

[0008] In one embodiment of the present application, the first adapter nozzle further comprises a adapter nozzle tip having two ends connected to the first adapter nozzle body and the sealing nozzle, and the sealing nozzle is sleeved outside the adapter nozzle tip and can move axially relative to the adapter nozzle tip.

[0009] In one embodiment of the present application, the outer diameter of the first adapter nozzle body is larger than the outer diameters of the sealing nozzle and the adapter nozzle tip, and the sealing nozzle is provided with an abutment portion protruding outwardly; the first elastic member is a first spring, and the first spring is sleeved on the outside of the adapter nozzle tip and the sealing nozzle, and its two ends abut against the end of the first adapter nozzle body and the abutment portion of the sealing nozzle.

[0010] In one embodiment of the present application, a fixing groove opening toward the first adapter port is provided at the tip of the adapter nozzle, and the first blocking valve needle is disposed in the fixing groove.

[0011] In one embodiment of the present application, the blocking nozzle is abutted against one end of the second adapter nozzle provided with a second adapter interface under the action of the first elastic member.

[0012] In one embodiment of the present application, a guide member is disposed in the second adapter flow channel, the guide member has a guide groove formed toward the second adapter port, and the second blocking valve needle is disposed in the guide groove.

[0013] In one embodiment of the present application, the guide member is symmetrically connected to the inner wall of the second transfer flow channel on both sides, and the guide member is provided with an adjustment hole along the axial direction perpendicular to the second transfer flow channel, and the adjustment hole passes through the second transfer nozzle and is connected to the guide groove;

[0014] The driving structure includes an adjusting member and a second elastic member, wherein the adjusting member passes through and extends out of the adjusting hole, one end of the second elastic member abuts against the portion of the adjusting member extending out of the adjusting hole, and the other end is fixed relative to the second adapter nozzle; one end of the second sealing valve needle abuts against the adjusting member, and in the axial direction of the second sealing valve needle, the length of the adjusting hole is greater than the width of the adjusting member.

[0015] In one embodiment of the present application, the outer diameter of the second adapter nozzle at one end close to the first adapter nozzle is smaller than the outer diameter of the second adapter nozzle at one end away from the first adapter nozzle, thereby forming a step on the outer periphery of the second adapter nozzle; the second elastic member is a second spring, which is sleeved on one end of the second adapter nozzle close to the first adapter nozzle and abuts against the step.

[0016] The present application also provides a stack mold hot runner system, comprising a first hot runner assembly, a second hot runner assembly, and the aforementioned adapter nozzle assembly connected to the first hot runner assembly and the second hot runner assembly.

[0017] One or more technical solutions provided by this application have at least the following technical effects or advantages:

[0018] The adapter nozzle assembly provided in the present application can automatically block the intermediate pipeline during the demoulding process by adopting the design of the blocking valve needle and the driving structure, solving the technical problem of the traditional stack mold hot runner system that is difficult to block due to pipeline disconnection. This design not only improves the reliability and accuracy of the blockage, but also ensures the stable flow of the rubber material throughout the production process, thereby improving the production efficiency and finished product quality of the injection molded parts and reducing the possibility of material waste and production failures. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the structure of the adapter nozzle assembly in the embodiment of the present application.

[0020] Figure 2 yes Figure 1 Side view of the transfer nozzle assembly.

[0021] Figure 3 yes Figure 2 Schematic cross-sectional view along line AA.

[0022] Figure 4 yes Figure 3 Enlarged view of point B in the middle.

[0023] Figure 5 yes Figure 4 Schematic diagram of the structure of the middle guide component.

[0024] Figure 6 It is a schematic diagram of the structure of the stack mold hot runner assembly in an embodiment of the present application.

[0025] 10. Transfer nozzle assembly; 20. Main nozzle; 30. Main manifold; 40. Transfer manifold; 50. First hot runner assembly; 501. First manifold; 502. First hot nozzle; 503. First drive mechanism; 60. Second hot runner assembly; 601. Second manifold; 602. Second hot nozzle; 603. Second drive mechanism;

[0026] 1. first adapter nozzle; 11. first adapter flow channel; 12. first plugging valve needle; 13. first adapter nozzle body; 131. first give-way cavity; 14. plugging nozzle; 141. first adapter port; 142. abutment portion; 15. adapter nozzle tip; 151. fixing groove; 16. first spring;

[0027] 2. Second adapter nozzle; 21. Second adapter flow channel; 22. Second blocking valve needle; 23. Second adapter nozzle body; 231. Second make way cavity; 232. Make way hole; 24. Guide member; 241. Guide member; 2411. Guide groove; 2412. Adjustment hole; 242. Ring body; 25. Fixing member; 251. Second adapter interface; 261. Adjustment member; 262. Second spring. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0029] Terms such as "center", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like used herein to indicate spatial relative positions are used for the purpose of convenience to describe the relationship of one unit or feature relative to another unit or feature as shown in the accompanying drawings. Terms of spatial relative positions may be intended to include different orientations of the device in use or operation other than the orientation shown in the drawings.

[0030] For example, if the device in the figures is turned over, elements described as "below" or "beneath" other elements or features would then be oriented "above" the other elements or features. Thus, the exemplary term "below" can encompass both an orientation of above and below. The device may be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

[0031] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0032] Furthermore, it should be understood that although the terms first, second, etc. may be used herein to describe various elements or structures, these described objects should not be limited by these terms. These terms are only used to distinguish these described objects from each other. For example, a first adapter nozzle may be referred to as a second adapter nozzle, and similarly, a second adapter nozzle may also be referred to as a first adapter nozzle, which does not deviate from the scope of protection of the present application.

[0033] The present application embodiment provides a transfer nozzle assembly 10, such as Figures 1 to 5As shown, it includes a first adapter nozzle 1 and a second adapter nozzle 2 that are docked with each other. The first adapter nozzle 1 is formed with a first adapter flow channel 11 and a first adapter port 141 located at one end of the first adapter flow channel 11. The first adapter nozzle 1 also includes a first blocking valve needle 12 and a first driving structure. The first blocking valve needle 12 and the first driving structure cooperate to close or open the first adapter port 141. The second adapter nozzle 2 is formed with a second adapter flow channel 21 and a second adapter port 251 located at one end of the second adapter flow channel 21. The second adapter port 251 docks with the first adapter port 141 so that the first adapter flow channel 11 and the second adapter flow channel 21 are connected; the second adapter nozzle 2 also includes a second blocking valve needle 22 and a second driving structure that drives the second blocking valve needle 22. The second blocking valve needle 22 closes or opens the second adapter port 251 under the action of the second driving structure.

[0034] The first sealing valve needle 12 and the second sealing valve needle 22 in the adapter nozzle assembly 10 provided in the present application can realize automatic sealing or opening functions through their respective driving structures, and can effectively control the flow of colloid in the flow channel. The adapter nozzle assembly 10 in the present application is used as a connecting pipe when applied to a stack mold hot runner system. When the first adapter nozzle 1 and the second adapter nozzle 2 are separated during demolding, they can each achieve glue sealing, thereby preventing the glue leakage caused by the disconnection of the connecting pipe when the stack mold hot runner system is demolded, thereby improving the sealing performance and reliability of the system.

[0035] An end of the first adapter nozzle 1 extends toward the second adapter nozzle 2 away from the outer circumference of the first adapter port 141, and an end of the second adapter nozzle 2 extends toward the first adapter nozzle 1 close to the inner circumference of the second adapter port 251, and the shapes of the extended parts of the first adapter nozzle 1 and the second adapter nozzle 2 match, so that the first adapter nozzle 1 and the second adapter nozzle 2 can be limited in the radial direction when docking.

[0036] Regarding the first adapter nozzle 1, in one embodiment of the present application, the first adapter nozzle 1 further includes a first adapter nozzle body 13 and a plugging nozzle 14, a first adapter port 141 is provided in the plugging nozzle 14, a first plugging valve needle 12 is at least partially disposed in the first adapter flow channel 11, and a first driving structure includes a first elastic member with two ends abutting against the first adapter nozzle body 13 and the plugging nozzle 14. The plugging nozzle 14 moves axially under the action of the first elastic member, so that the first adapter port 141 can approach or move away from the first plugging valve needle 12, and when the plugging nozzle 14 moves to the first adapter port 141 and contacts the first plugging valve needle 12, the first plugging valve needle 12 can close the first adapter port 141, and the first adapter nozzle 1 can be sealed with glue.

[0037] Furthermore, the first adapter nozzle 1 also includes an adapter nozzle tip 15 connected to the first adapter nozzle body 13 and the sealing nozzle 14 at both ends. The sealing nozzle 14 is sleeved outside the adapter nozzle tip 15 and can move axially relative to the adapter nozzle tip 15.

[0038] like Figure 3 In the embodiment, the first adapter nozzle body 13 is provided with a first clearance cavity 131, one end of the adapter nozzle tip 15 is provided in the first clearance cavity 131, and the inner wall of the first clearance cavity 131 is provided with an internal thread, and the adapter nozzle tip 15 is provided with an external thread, and the adapter nozzle tip 15 is screwed to the first adapter nozzle body 13 through the thread. The outer diameter of the adapter nozzle tip 15 away from the end of the first adapter nozzle body 13 matches the inner diameter of the plugging nozzle 14 close to the end of the first adapter nozzle body 13, and the cross section can be circular or polygonal, so that the plugging nozzle 14 can move relative to the adapter nozzle tip 15.

[0039] Furthermore, the outer diameter of the first adapter nozzle body 13 is larger than the outer diameters of the plugging nozzle 14 and the adapter nozzle tip 15, and the plugging nozzle 14 is provided with an abutment portion 142 protruding outwardly; the first elastic member is a first spring 16, and the first spring 16 is sleeved outside the adapter nozzle tip 15 and the plugging nozzle 14, and both ends abut against the abutment portion 142 of the end of the first adapter nozzle body 13 and the plugging nozzle 14. The abutment portion 142 is provided outside the plugging nozzle 14, and the first spring 16 is sleeved outside the adapter nozzle tip 15 and the plugging nozzle 14, and the first spring 16 can control the plugging nozzle 14 by abutting against the end of the first adapter nozzle body 13 and the abutment portion 142.

[0040] In one embodiment of the present application, a fixing groove 151 with an opening toward the first adapter port 141 is provided at the end of the adapter nozzle tip 15, and the first blocking valve needle 12 is disposed in the fixing groove 151. Figure 3 In the embodiment, the outlet end of the transfer nozzle tip 15 is configured to discharge materials through four through holes arranged in sequence (including Figure 4 The two through holes cut in half, Figure 4 A complete through hole in the middle and a complete through hole cut away and not shown in the figure) are formed between the four through holes to form a solid structure, and a fixing groove 151 is provided on the solid structure to fix the first blocking valve needle 12. The first blocking valve needle 12 is provided with an external thread, and the fixing groove 151 is provided with an internal thread, so that the first blocking valve needle 12 can be fixed to the adapter nozzle tip 15 by thread.

[0041] Furthermore, the cross-section of one end of the first blocking valve needle 12 extending out of the fixing groove 151 is larger, which matches the shape of the first adapter 141 , so that the first blocking valve needle 12 can close the first adapter 141 for sealing.

[0042] In one embodiment of the present application, the plugging nozzle 14 abuts against one end of the second adapter nozzle 2 provided with the second adapter port 251 under the action of the first elastic member. When the first adapter nozzle 1 abuts against the second adapter nozzle 2, the first spring 16 is compressed and has a tendency to recover its original shape with a restoring force. At this time, one end of the first plugging valve needle 12 protrudes out of the first adapter port 141; when the first adapter nozzle 1 is separated from the second adapter nozzle 2, the plugging nozzle 14 loses the supporting force of the second adapter nozzle 2, and under the action of the restoring force of the first spring 16, the plugging nozzle 14 is pushed away from the first adapter nozzle body 13, so that the first adapter port 141 gradually approaches the end of the first plugging valve needle 12, until the end of the first plugging valve needle 12 closes the first adapter port 141, thereby achieving sealing.

[0043] Regarding the second adapter nozzle 2 , in one embodiment of the present application, a guide member 241 is disposed in the second adapter flow channel 21 , the guide member 241 has a guide groove 2411 formed toward the second adapter port 251 , and the second blocking valve needle 22 is disposed in the guide groove 2411 .

[0044] The cross section of the end of the second plugging valve needle 22 extending out of the guide groove 2411 is larger, which matches the shape of the second adapter 251, so that the second plugging valve needle 22 can close the second adapter 251 for sealing. The inner peripheral shape of the guide groove 2411 matches the outer peripheral shape of the end of the second plugging valve needle 22 away from the larger cross section, so that the second plugging valve needle 22 can move axially in the guide groove 2411.

[0045] Specifically, the guide member 241 is symmetrically connected to the inner wall of the second adapter channel 21 on both sides, and the guide member 241 is provided with an adjustment hole 2412 along the axial direction perpendicular to the second adapter channel 21, the adjustment hole 2412 passes through the second adapter nozzle 2 and is connected with the guide groove 2411; the driving structure includes an adjustment member 261 and a second elastic member, the adjustment member 261 passes through and extends out of the adjustment hole 2412, one end of the second elastic member abuts against the part of the adjustment member 261 extending out of the adjustment hole 2412, and the other end is fixed relative to the second adapter nozzle 2; one end of the second blocking valve needle 22 abuts against the adjustment member 261, and in the axial direction of the second blocking valve needle 22, the length of the adjustment hole 2412 is greater than the width of the adjustment member 261.

[0046] The two ends of the guide member 241 are connected to the second adapter flow channel 21, and the adjustment hole 2412 can penetrate the guide member 241 and the second adapter nozzle 2, so that both ends of the adjustment member 261 can extend out of the adjustment hole 2412, and both ends of the adjustment member 261 abut against the second elastic member, which can ensure the adjustment stability of the adjustment member 261 on the second blocking valve needle 22. Of course, the adjustment hole 2412 can also be formed into a groove-shaped structure with an opening toward one side, that is, the adjustment hole 2412 is set as an adjustment groove, and one end of the adjustment member 261 extends out of the adjustment groove and abuts against the second elastic member, but the adjustment stability of this structure is poor.

[0047] In order to realize the production of the second transfer nozzle 2, the second transfer nozzle 2 includes a second transfer nozzle body 23, a guide member 24 and a fixing member 25, wherein the second transfer nozzle body 23 is provided with a second clearance cavity 231 at one end close to the first transfer nozzle body 13, the guide member 24 is provided in the second clearance cavity 231, and the fixing member 25 is partially provided in the second clearance cavity 231. The guide member 24 includes a circular ring body 242 and the aforementioned guide member 241, the guide member 241 is connected to the inner wall of the circular ring body 242, and the inner wall of the circular ring body 242 and the guide member 241 form a part of the second transfer flow channel 21; the fixing member 25 is a hollow structure, which is also a part of the second transfer flow channel 21, and the second transfer port 251 is provided on the fixing member 25. The second transfer nozzle body 23 is provided with a second clearance cavity 231, and two clearance holes 232 are symmetrically provided corresponding to the adjustment hole 2412 for the adjustment member 261 to pass through.

[0048] When installing the second adapter nozzle 2, firstly set the guide member 24 in the second clearance cavity 231, then pass the adjustment member 261 through the clearance hole 232 and the adjustment hole 2412, or insert the second blocking valve needle 22 into the guide groove 2411, these two steps are not in order, and then insert the fixing member 25 into the second clearance cavity 231. Among them, the inner wall of the second clearance cavity 231 is provided with an internal thread, and the outer surface of the fixing member 25 is provided with an external thread. The fixing member 25 is installed on the second adapter nozzle body 23 through threads, and the second adapter nozzle body 23 and the guide member 24 are pressed tightly, and the guide member 24 and the fixing member 25 are pressed tightly.

[0049] Furthermore, the outer diameter of the second adapter nozzle 2 near the first adapter nozzle 1 is less than the outer diameter of the second adapter nozzle 2 far from the first adapter nozzle 1, thereby forming a step on the outer periphery of the second adapter nozzle 2; the second elastic member is a second spring 262, which is sleeved on the end of the second adapter nozzle 2 near the first adapter nozzle 1 and abuts against the step. Specifically, the step is located outside the second adapter nozzle body 23, and the second spring 262 as the second elastic member is sleeved outside the second adapter nozzle body 23, which can be limited in radial direction to ensure the stability of the elastic member, and at the same time, one spring can abut against both ends of the adjustment member 261.

[0050] When the first adapter nozzle 1 and the second adapter nozzle 2 are in contact, the first plugging valve needle 12 and the second plugging valve needle 22 are also in contact, and the second spring 262 is compressed. Since the position of the first plugging valve needle 12 remains unchanged, the second spring 262 cannot push the adjusting member 261 to move the second plugging valve needle 22 to close the second adapter port 251, thereby achieving the colloid flow between the first adapter flow channel 11 and the second adapter flow channel 21. When the first adapter nozzle 1 and the second adapter nozzle 2 are separated, the second plugging valve needle 22 loses the support of the first plugging valve needle 12, and pushes the adjusting member 261 under the action of the restoring force of the second spring 262, thereby pushing the second plugging valve needle 22 close to the second adapter port 251 until the second adapter port 251 is closed to achieve the glue sealing.

[0051] When the adapter nozzle assembly 10 of the present application can be applied to a stack mold hot runner system, therefore, an embodiment of the present application also provides a stack mold hot runner system, including a first hot runner assembly 50, a second hot runner assembly 60 and the aforementioned adapter nozzle assembly 10 connected to the first hot runner assembly 50 and the second hot runner assembly 60.

[0052] Specifically, Figure 6 The middle stack mold hot runner system includes a main nozzle 20, a main manifold 30, the aforementioned adapter nozzle assembly 10, an adapter manifold 40, and a first hot runner assembly 50 and a second hot runner assembly 60 that are connected in sequence. When the adapter nozzle assembly 10 is installed in the stack mold hot runner system, the first adapter nozzle 1 is fixed to the main manifold 30, the second adapter nozzle 2 is fixed to the adapter manifold 40, and the first adapter port 141 of the first adapter nozzle 1 and the second adapter port 251 of the second adapter nozzle 2 are docked and pressed together through the main manifold 30 and the adapter manifold 40, that is, there is no fixed connection relationship between the first adapter nozzle 1 and the second adapter nozzle 2.

[0053] The first hot runner assembly 50 includes a first manifold plate 501, a first hot nozzle 502 and a first driving mechanism 503, and the second hot runner assembly 60 includes a second manifold plate 601, a second hot nozzle 602 and a second driving mechanism 603. A first valve needle is arranged in the first hot nozzle 502, and the first driving mechanism 503 drives the first valve needle to reciprocate to control whether the first hot nozzle 502 discharges glue. There are multiple first hot nozzles 502 and the first valve needles therein, and there are multiple first driving mechanisms 503 corresponding to the first hot nozzles 502; a second valve needle is arranged in the second hot nozzle 602, and the second driving mechanism 603 drives the second valve needle to reciprocate to control whether the second hot nozzle 602 discharges glue. There are multiple second hot nozzles 602 and the second valve needles therein, and there are multiple second driving mechanisms 603 corresponding to the second hot nozzles 602.

[0054] Furthermore, the glue discharge directions of the first hot nozzle 502 and the second hot nozzle 602 are opposite, and a first mold is provided on the glue discharge side of the first hot nozzle 502 in the first diverter plate 501, and a second mold is provided on the glue discharge side of the second hot nozzle 602 in the second diverter plate 601. Figure 6 Taking the example that the first hot runner assembly 50 is closer to the main nozzle 20 , the first template is arranged between the first manifold plate 501 and the main manifold plate 30 .

[0055] It should be understood that although this specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each implementation mode may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

[0056] The series of detailed descriptions listed above are only specific descriptions of feasible implementation methods of the present application. They are not intended to limit the scope of protection of the present application. Any equivalent implementation methods or changes that do not deviate from the technical spirit of the present application should be included in the scope of protection of the present application.

Claims

1. A transfer nozzle assembly, characterized in that: include: A first adapter nozzle, formed with a first adapter flow channel and a first adapter port located at one end of the first adapter flow channel, the first adapter nozzle also includes a first blocking valve needle and a first drive structure, the first blocking valve needle and the first drive structure cooperate to close or open the first adapter port; A second adapter nozzle is formed with a second adapter flow channel and a second adapter port located at one end of the second adapter flow channel, wherein the second adapter port is docked with the first adapter port so that the first adapter flow channel is connected to the second adapter flow channel; The second adapter nozzle also includes a second blocking valve needle and a second driving structure for driving the second blocking valve needle. The second blocking valve needle closes or opens the second adapter port under the action of the second driving structure.

2. The adapter nozzle assembly according to claim 1, characterized in that: The first adapter nozzle also includes a first adapter nozzle body and a sealing nozzle, the first adapter interface is opened in the sealing nozzle, the first sealing valve needle is at least partially arranged in the first adapter flow channel, and the first driving structure includes a first elastic member with two ends abutting against the first adapter nozzle body and the sealing nozzle.

3. The adapter nozzle assembly according to claim 2, characterized in that: The first adapter nozzle also includes an adapter nozzle tip with two ends connected to the first adapter nozzle body and the sealing nozzle. The sealing nozzle is sleeved outside the adapter nozzle tip and can move axially relative to the adapter nozzle tip.

4. The adapter nozzle assembly according to claim 3, characterized in that: The outer diameter of the first adapter nozzle body is larger than the outer diameters of the sealing nozzle and the adapter nozzle tip, and the sealing nozzle is provided with an abutment portion protruding outwardly; the first elastic member is a first spring, and the first spring is sleeved on the outside of the adapter nozzle tip and the sealing nozzle, and its two ends abut against the end of the first adapter nozzle body and the abutment portion of the sealing nozzle.

5. The adapter nozzle assembly according to claim 3, characterized in that: The tip of the adapter nozzle is provided with a fixing groove opening toward the first adapter port, and the first blocking valve needle is arranged in the fixing groove.

6. The adapter nozzle assembly according to claim 2, characterized in that: The blocking nozzle is abutted against one end of the second adapter nozzle provided with a second adapter interface under the action of the first elastic member.

7. The adapter nozzle assembly according to claim 1, characterized in that: A guide member is arranged in the second transfer flow channel, the guide member has a guide groove formed toward the second transfer interface, and the second blocking valve needle is arranged in the guide groove.

8. The adapter nozzle assembly according to claim 7, characterized in that: The guide member is symmetrically connected to the inner wall of the second transfer flow channel at both sides, and the guide member is provided with an adjustment hole along the axial direction perpendicular to the second transfer flow channel, and the adjustment hole passes through the second transfer nozzle and is connected to the guide groove; The driving structure includes an adjusting member and a second elastic member, wherein the adjusting member passes through and extends out of the adjusting hole, one end of the second elastic member abuts against the portion of the adjusting member extending out of the adjusting hole, and the other end is fixed relative to the second adapter nozzle; one end of the second sealing valve needle abuts against the adjusting member, and in the axial direction of the second sealing valve needle, the length of the adjusting hole is greater than the width of the adjusting member.

9. The adapter nozzle assembly according to claim 8, characterized in that: The outer diameter of the second adapter nozzle at one end close to the first adapter nozzle is smaller than the outer diameter of the second adapter nozzle at one end away from the first adapter nozzle, thereby forming a step at the outer periphery of the second adapter nozzle; The second elastic member is a second spring, which is sleeved on one end of the second adapter nozzle close to the first adapter nozzle and abuts against the step.

10. A stack mold hot runner system, characterized in that: The invention comprises a first hot runner assembly, a second hot runner assembly and a transfer nozzle assembly connected to the first hot runner assembly and the second hot runner assembly, wherein the transfer nozzle assembly is the transfer nozzle assembly according to any one of claims 1 to 9.

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