Adapter nozzle assembly and stack mold hot runner system

Abstract

The utility model 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] This application relates to the field of hot runner technology, and more particularly to an adapter nozzle assembly and a stacked hot runner system provided with the adapter nozzle assembly. Background Technology

[0002] In hot runner systems, a stacked mold hot runner system is designed to increase production. This system has two sets of hot nozzles with opposite ejection directions, injecting material into molds on opposite sides to produce double-injection parts. However, due to the necessity of demolding, when demolding the mold near the main nozzle, the intermediate pipe connecting the main nozzle and the hot nozzles must be disconnected, which presents a problem of difficult sealing when the intermediate pipe is disconnected. Utility Model Content

[0003] The purpose of this application is to provide an adapter assembly that, by setting a first adapter and a second adapter with a sealing valve needle and a driving structure, effectively seals the runner system during demolding, thereby preventing material leakage and ensuring the stability and operating efficiency of the system.

[0004] To achieve one of the aforementioned objectives of the utility model, one embodiment of this application provides an adapter assembly, comprising:

[0005] The first adapter nozzle has a first adapter flow channel and a first adapter interface located at one end of the first adapter flow channel. The first adapter nozzle also includes a first sealing valve needle and a first driving structure. The first sealing valve needle and the first driving structure cooperate to close or open the first adapter interface.

[0006] The second adapter nozzle has a second adapter flow channel and a second adapter interface located at one end of the second adapter flow channel. The second adapter interface is connected to the first adapter interface to make the first adapter flow channel and the second adapter flow channel connected. The second adapter nozzle also includes a second sealing valve needle and a second driving structure for driving the second sealing valve needle. 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 this application, the first adapter nozzle further includes a first adapter nozzle body and a sealing nozzle, the first adapter interface is opened at the sealing nozzle, the first sealing valve needle is at least partially disposed in the first adapter flow channel, and the first drive structure includes a first elastic member with both ends abutting against the first adapter nozzle body and the sealing nozzle.

[0008] In one embodiment of this application, the first adapter nozzle further includes an adapter nozzle tip connected at both ends to the first adapter nozzle body and the sealing nozzle, wherein 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 greater than the outer diameter of the blocking nozzle and the adapter nozzle tip, and the blocking nozzle is externally convex with an abutting portion; the first elastic member is a first spring, which is sleeved outside the adapter nozzle tip and the blocking nozzle and abuts at both ends on the end of the first adapter nozzle body and the abutting portion of the blocking nozzle.

[0010] In one embodiment of the present application, the end of the adapter nozzle tip is provided with a fixed groove with an opening facing the first adapter port, and the first blocking valve needle is arranged in the fixed groove.

[0011] In one embodiment of the present application, the blocking nozzle is arranged at one end of the second adapter port under the action of the first elastic member.

[0012] In one embodiment of the present application, a guide member is arranged in the second adapter flow channel, the guide member is provided with a guide groove facing the second adapter port, and the second blocking valve needle is arranged 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 adapter flow channel on both sides, and the guide member is provided with an adjusting hole in the axial direction perpendicular to the second adapter flow channel, the adjusting hole penetrates the second adapter nozzle and communicates with the guide groove.

[0014] The driving structure includes an adjusting member and a second elastic member, the adjusting member penetrates and extends out of the adjusting hole, one end of the second elastic member abuts on the part 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 blocking valve needle abuts on the adjusting member, and in the axial direction of the second blocking 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 end of the second adapter nozzle close to the first adapter nozzle is less than the outer diameter of the end of the second adapter nozzle away from the first adapter nozzle, so as to form a step on the outer periphery of the second adapter nozzle; the second elastic member is a second spring, which is sleeved on the end of the second adapter nozzle close to the first adapter nozzle and abuts on the step.

[0016] The present application also provides a stack mold hot runner system, which comprises a first hot runner assembly, a second hot runner assembly, and the aforementioned adapter nozzle assembly in communication with the first hot runner assembly and the second hot runner assembly.

[0017] The one or more technical solutions provided by the present application have at least the following technical effects or advantages:

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

[0019] Figure 1 FIG. 1 is a structural schematic diagram of an adapter nozzle assembly in the application.

[0020] Figure 2 FIG. 2 is a side view of the adapter nozzle assembly in FIG. 1. Figure 1

[0021] Figure 3 FIG. 3 is a sectional view along line A-A in FIG. 2. Figure 2

[0022] Figure 4 FIG. 4 is an enlarged view of B in FIG. 3. Figure 3

[0023] Figure 5 FIG. 5 is a structural schematic diagram of a guide member in the adapter nozzle assembly in FIG. 1. Figure 4

[0024] Figure 6 FIG. 6 is a structural schematic diagram of a stack mold hot runner assembly in the application.

[0025] 10, adapter nozzle assembly; 20, main nozzle; 30, main distributor plate; 40, adapter distributor plate; 50, first hot runner assembly; 501, first distributor plate; 502, first hot nozzle; 503, first driving mechanism; 60, second hot runner assembly; 601, second distributor plate; 602, second hot nozzle; 603, second driving mechanism;

[0026] 1, first adapter nozzle; 11, first adapter runner; 12, first blocking valve needle; 13, first adapter nozzle body; 131, first accommodation cavity; 14, blocking 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 runner; 22, second blocking valve needle; 23, second adapter nozzle body; 231, second accommodation cavity; 232, accommodation hole; 24, guide member; 241, guide piece; 2411, guide groove; 2412, adjusting hole; 242, circular ring body; 25, fixing piece; 251, second adapter port; 261, adjusting piece; 262, second spring. DETAILED DESCRIPTION ​​​​

[0028] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative effort fall within the protection scope of the present application.

[0029] For example, the terms "center", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like used herein to describe spatial relative positions are for the purpose of facilitating the description of the relationship of one unit or feature to another unit or feature as shown in the drawings. The spatial relative position terms can be intended to include different orientations of the device in use or in operation in addition to the orientation shown in the drawings.

[0030] For example, if the device in the drawings is turned over, the unit described as being "below" or "under" the other unit or feature will be "above" the other unit or feature. Therefore, the exemplary term "below" can encompass both upward and downward orientations. The device can be oriented in other ways (rotated 90 degrees or other orientations), and the spatially-related descriptions used herein can be interpreted accordingly.

[0031] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connecting" should be understood broadly, for example, can be fixedly connected, can be detachably connected, or integrally connected; can be mechanically connected, or electrically connected; can be directly connected, or indirectly connected through an intermediate medium, or can be the internal communication of two elements. For a person of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances.

[0032] Also, it should be understood that although the terms first, second, etc. can 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 one described object from another. For example, a first adapter nozzle can be called a second adapter nozzle, and similarly a second adapter nozzle can also be called a first adapter nozzle, without departing from the scope of the present application.

[0033] The present application provides an adapter nozzle assembly 10, as shown in Figures 1-5As shown, the adapter assembly 10 comprises a first adapter nozzle 1 and a second adapter nozzle 2 which are connected to 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 further comprises 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 is connected to the first adapter port 141 so that the first adapter flow channel 11 and the second adapter flow channel 21 are communicated; the second adapter nozzle 2 further comprises a second blocking valve needle 22 and a second driving structure for driving the second blocking valve needle 22, the second blocking valve needle 22 is closed or opened under the action of the second driving structure.

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

[0035] The end of the first adapter nozzle 1 away from the outer periphery of the first adapter port 141 extends towards the second adapter nozzle 2, the end of the second adapter nozzle 2 close to the inner periphery of the second adapter port 251 extends towards the first adapter nozzle 1, and the extension parts of the first adapter nozzle 1 and the second adapter nozzle 2 are matched in shape, so that the first adapter nozzle 1 and the second adapter nozzle 2 can be limited in the radial direction when they are connected.

[0036] Regarding the first adapter nozzle 1, in an embodiment of the present application, the first adapter nozzle 1 further comprises a first adapter nozzle body 13 and a blocking nozzle 14, the first adapter port 141 is formed in the blocking nozzle 14, the first blocking valve needle 12 is at least partially arranged in the first adapter flow channel 11, and the first driving structure comprises a first elastic member abutting against the first adapter nozzle body 13 and the blocking nozzle 14 at both ends. The blocking nozzle 14 moves along the axial direction under the action of the first elastic member, so that the first adapter port 141 can be close to or away from the first blocking valve needle 12, and when the blocking nozzle 14 moves to contact the first blocking valve needle 12, the first blocking valve needle 12 can close the first adapter port 141, that is, the first adapter nozzle 1 can block the glue.

[0037] Further, the first adapter nozzle 1 further comprises an adapter nozzle tip 15 connected to the first adapter nozzle body 13 and the blocking nozzle 14 at both ends, and the blocking nozzle 14 is sleeved on the adapter nozzle tip 15 and can move along the axial direction relative to the adapter nozzle tip 15.

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

[0039] Further, the outer diameter of the first adapter nozzle body 13 is greater than the outer diameter of the sealing nozzle 14 and the adapter nozzle tip 15, and the sealing nozzle 14 is provided with an abutting portion 142. The first elastic member is a first spring 16, the first spring 16 is sleeved on the outside of the adapter nozzle tip 15 and the sealing nozzle 14, and the two ends are abutted on the end of the first adapter nozzle body 13 and the abutting portion 142 of the sealing nozzle 14. The abutting portion 142 is arranged on the outside of the sealing nozzle 14, the first spring 16 is sleeved on the outside of the adapter nozzle tip 15 and the sealing nozzle 14, and the control of the first spring 16 on the sealing nozzle 14 is realized by abutting the end of the first adapter nozzle body 13 and the abutting portion 142.

[0040] In an embodiment of the present application, the end of the adapter nozzle tip 15 is provided with a fixed groove 151 with an opening facing the first adapter port 141, and the first sealing valve needle 12 is arranged in the fixed groove 151. Figure 3 In the embodiment, the outlet end of the adapter nozzle tip 15 is arranged in four through holes arranged in sequence to discharge (including Figure 4 two through holes cut in half, Figure 4 one complete through hole and one complete through hole not shown, ) to form a solid structure between the four through holes, and a fixed groove 151 is arranged on the solid structure for fixing the first sealing valve needle 12. The first sealing valve needle 12 is provided with an external thread, and the fixed groove 151 is provided with an internal thread, so that the first sealing valve needle 12 can be fixed to the adapter nozzle tip 15 by screwing.

[0041] Further, the end of the first sealing valve needle 12 extending out of the fixed groove 151 has a large cross section, which matches the shape of the first adapter port 141, so that the first sealing valve needle 12 can close the first adapter port 141 to seal the glue.

[0042] In an embodiment of the present application, the sealing nozzle 14 is in abutment with one end of the second adapter port 251 of the second adapter nozzle 2 under the action of the first elastic member. When the first adapter nozzle 1 is in abutment with the second adapter nozzle 2, the first spring 16 is compressed and has a tendency to return to its original shape, with a restoring force, and the first sealing valve needle 12 protrudes out of the first adapter port 141 at this time. When the first adapter nozzle 1 is separated from the second adapter nozzle 2, the sealing nozzle 14 loses the support force of the second adapter nozzle 2, and under the action of the restoring force of the first spring 16, the sealing 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 sealing valve needle 12, until the end of the first sealing valve needle 12 closes the first adapter port 141, and the glue is sealed.

[0043] Regarding the second adapter nozzle 2, in an embodiment of the present application, a guide member 241 is arranged in the second adapter flow channel 21, the guide member 241 is provided with a guide groove 2411 facing the second adapter port 251, and the second sealing valve needle 22 is arranged in the guide groove 2411.

[0044] The end of the second sealing valve needle 22 protruding out of the guide groove 2411 has a larger cross section, which cooperates with the shape of the second adapter port 251, so that the second sealing valve needle 22 can close the second adapter port 251 for sealing the glue. The inner peripheral shape of the guide groove 2411 cooperates with the outer peripheral shape of the end of the second sealing valve needle 22 away from the larger cross section, so that the second sealing 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 flow channel 21 on both sides, and the guide member 241 is provided with an adjusting hole 2412 perpendicular to the axial direction of the second adapter flow channel 21, the adjusting hole 2412 penetrates through the second adapter nozzle 2 and communicates with the guide groove 2411; the driving structure includes an adjusting member 261 and a second elastic member, the adjusting member 261 penetrates through and protrudes out of the adjusting hole 2412, one end of the second elastic member is in abutment with the part of the adjusting member 261 protruding out of the adjusting hole 2412, and the other end is fixed relative to the second adapter nozzle 2; one end of the second sealing valve needle 22 is in abutment with the adjusting member 261, and in the axial direction of the second sealing valve needle 22, the length of the adjusting hole 2412 is greater than the width of the adjusting member 261.

[0046] Since the guide member 241 is connected to the second adapter flow channel 21 at both ends, the adjusting hole 2412 can penetrate through the guide member 241 and the second adapter nozzle 2, so that both ends of the adjusting member 261 can protrude out of the adjusting hole 2412, and both ends of the adjusting member 261 are in abutment with the second elastic member, which can ensure the stability of the adjustment of the adjusting member 261 to the second sealing valve needle 22. Of course, the adjusting hole 2412 can also be opened as a groove structure towards one side, that is, the adjusting hole 2412 is arranged as an adjusting groove, one end of the adjusting member 261 protrudes out of the adjusting groove and is in abutment with the second elastic member, but the adjusting stability of this structure is poor.

[0047] To realize the production of the second adapter 2, the second adapter 2 comprises a second adapter body 23, a guide member 24 and a fixing member 25, wherein the second adapter body 23 is provided with a second accommodating cavity 231 at one end close to the first adapter 13, the guide member 24 is arranged in the second accommodating cavity 231, and the fixing member 25 is partially arranged in the second accommodating cavity 231. The guide member 24 comprises a circular ring body 242 and the aforementioned guide member 241, the guide member 241 is connected with 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 adapter flow channel 21; the fixing member 25 is in a hollow structure and is also a part of the second adapter flow channel 21, and the second adapter port 251 is arranged on the fixing member 25. The second adapter body 23 is provided with two accommodating holes 232 at the position of the second accommodating cavity 231, which are symmetrically arranged corresponding to the adjusting holes 2412 and are used for the adjusting member 261 to pass through.

[0048] When the second adapter 2 is installed, the guide member 24 is arranged in the second accommodating cavity 231 first, then the adjusting member 261 passes through the accommodating hole 232 and the adjusting hole 2412, or the second blocking valve needle 22 is inserted into the guide groove 2411, and the two steps are not in sequence, and then the fixing member 25 is also inserted into the second accommodating cavity 231. The inner wall of the second accommodating cavity 231 is provided with internal threads, the outer part of the fixing member 25 is provided with external threads, the fixing member 25 is installed on the second adapter body 23 through the threads, and the second adapter body 23 and the guide member 24 are tightly clamped, and the guide member 24 and the fixing member 25 are tightly clamped.

[0049] Further, the outer diameter of the second adapter 2 close to one end of the first adapter 1 is less than the outer diameter of the second adapter 2 away from one end of the first adapter 1, so that a step is formed on the outer periphery of the second adapter 2; the second elastic member is a second spring 262, and the second spring 262 is sleeved on the end of the second adapter 2 close to the first adapter 1 and abuts against the step. Specifically, the step is located on the outside of the second adapter body 23, the second spring 262 as the second elastic member is sleeved on the outside of the second adapter body 23, which can limit in the radial direction and ensure the stability of the elastic member, and one spring can abut against both ends of the adjusting member 261.

[0050] When the first adapter nozzle 1 and the second adapter nozzle 2 abut, the first blocking valve needle 12 and the second blocking valve needle 22 also abut, and the second spring 262 is compressed. Since the position of the first blocking valve needle 12 does not change, the second spring 262 cannot push the adjusting piece 261 to move the second blocking valve needle 22 to close the second adapter port 251, and the gel flow between the first adapter flow channel 11 and the second adapter flow channel 21 is realized. When the first adapter nozzle 1 and the second adapter nozzle 2 are separated, the second blocking valve needle 22 loses the support of the first blocking valve needle 12 and pushes the adjusting piece 261 under the action of the restoring force of the second spring 262, thereby pushing the second blocking valve needle 22 close to the second adapter port 251 until the second adapter port 251 is closed, and the gel is sealed.

[0051] When the adapter nozzle assembly 10 of the present application can be applied to a stack mold hot runner system, the present application also provides a stack mold hot runner system, which comprises a first hot runner assembly 50, a second hot runner assembly 60 and the aforementioned adapter nozzle assembly 10 in communication with the first hot runner assembly 50 and the second hot runner assembly 60.

[0052] Specifically, as shown in FIG. 1, the stack mold hot runner system comprises a main nozzle 20, a main distribution plate 30, the aforementioned adapter nozzle assembly 10, a distribution plate 40 and the first hot runner assembly 50 and the second hot runner assembly 60 in communication with the distribution plate 40. Figure 6 The adapter nozzle assembly 10 is installed in the stack mold hot runner system, the first adapter nozzle 1 is fixed to the main distribution plate 30, the second adapter nozzle 2 is fixed to the distribution plate 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 butted and tightly pressed through the main distribution plate 30 and the distribution plate 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 comprises a first distribution plate 501, a first hot nozzle 502 and a first driving mechanism 503, and the second hot runner assembly 60 comprises a second distribution 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. The first hot nozzle 502 and the first valve needle therein are provided in multiple, and the first driving mechanism 503 also corresponds to the first hot nozzle 502 and is provided in multiple. 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. The second hot nozzle 602 and the second valve needle therein are provided in multiple, and the second driving mechanism 603 also corresponds to the second hot nozzle 602 and is provided in multiple.

[0054] Further, the glue discharging directions of the first hot nozzle 502 and the second hot nozzle 602 are opposite, the first hot nozzle 502 is provided with a first mold on the glue discharging side in the first distribution plate 501, and the second hot nozzle 602 is provided with a second mold on the glue discharging side in the second distribution plate 601, as shown in FIG. 4. Figure 6 Taking the first hot runner assembly 50 as an example, the first hot runner assembly 50 is closer to the main nozzle 20, the first mold plate is arranged between the first distribution plate 501 and the main distribution plate 30.

[0055] It should be understood that, although the present specification is described in terms of embodiments, not every embodiment contains only one independent technical solution, and the description of the specification is only for the sake of clarity, and those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can be combined appropriately to form other embodiments that those skilled in the art can understand.

[0056] The series of detailed descriptions listed above are only specific descriptions of the feasible embodiments of the present application, and are not used to limit the protection scope of the present application, and equivalent embodiments or changes made without departing from the spirit of the present application should be included in the protection scope of the present application.

Claims

1. An adaptor tip assembly comprising: The application relates to a switching nozzle assembly. The switching nozzle assembly comprises a first switching nozzle and a second switching nozzle. The first switching nozzle is provided with a first switching flow channel and a first switching port at one end of the first switching flow channel. The first switching nozzle further comprises a first blocking valve needle and a first driving structure.

2. The adaptor assembly of claim 1, wherein, The second switching nozzle is provided with a second switching flow channel and a second switching port at one end of the second switching flow channel.

3. The adaptor assembly of claim 2, wherein, The second switching port is connected with the first switching port, so that the first switching flow channel and the second switching flow channel are communicated.

4. The adaptor assembly of claim 3, wherein, The second switching nozzle further comprises a second blocking valve needle and a second driving structure for driving the second blocking valve needle.

5. The adaptor assembly of claim 3, wherein, The first switching nozzle further comprises a first switching nozzle body and a blocking nozzle.

6. The adaptor assembly of claim 2, wherein, The first switching port is arranged in the blocking nozzle.

7. The adaptor assembly of claim 1, wherein, The first blocking valve needle is arranged in the first switching flow channel.

8. The adaptor assembly of claim 7, wherein, The first driving structure comprises a first elastic member arranged at two ends of the first switching nozzle body and the blocking nozzle. The first switching nozzle further comprises a switching nozzle tip connected with the first switching nozzle body and the blocking nozzle.

9. The adaptor assembly of claim 8, wherein, The blocking nozzle is arranged outside the switching nozzle tip and can move along the axial direction of the switching nozzle tip. The outer diameter of the first switching nozzle body is larger than the outer diameter of the blocking nozzle and the switching nozzle tip.

10. A stack mold hot runner system characterized by, The blocking nozzle is provided with an abutting portion. The first elastic member is a first spring. The first spring is arranged outside the switching nozzle tip and the blocking nozzle. The first blocking valve needle is arranged in the fixing groove. The blocking nozzle is arranged at one end of the second switching port of the second switching nozzle under the action of the first elastic member. The second switching flow channel is provided with a guide member. The guide member is provided with a guide groove facing the second switching port. The second blocking valve needle is arranged in the guide groove. The guide member is symmetrically connected with the inner wall of the second switching flow channel. The guide member is provided with an adjusting hole perpendicular to the axial direction of the second switching flow channel. The adjusting hole penetrates the second switching nozzle and is communicated with the guide groove. The driving structure comprises an adjusting member and a second elastic member. The adjusting member penetrates and extends out of the adjusting hole. One end of the second elastic member is abutted with the part of the adjusting member extending out of the adjusting hole. The other end of the second elastic member is fixed relative to the second switching nozzle. One end of the second blocking valve needle is abutted with the adjusting member. The length of the adjusting hole is larger than the width of the adjusting member in the axial direction of the second blocking valve needle. The outer diameter of one end of the second switching nozzle close to the first switching nozzle is smaller than the outer diameter of the other end of the second switching nozzle. The second elastic member is a second spring. The second spring is arranged outside one end of the second switching nozzle close to the first switching nozzle and is abutted with the step.

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