Hot runner system
By designing the manifold of the hot runner system as two sub-manifolds and introducing a transition piece to form a unidirectional transition flow channel, the problems of sealing ring aging and complex processing are solved, achieving low-cost, high-efficiency flow channel processing and smooth fluid transmission.
Patent Information
- Application Number
- CN202423023603.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-09
- Publication Date
- 2025-11-04
- Estimated Expiration
- 2034-12-09
AI Technical Summary
In existing valve needle hot runner systems, the sealing rings inside the oil cylinder or air cylinder are prone to aging and failure under heat, leading to system malfunctions. At the same time, the manifold structure is complex and requires high machining precision, resulting in high machining and time costs, which affects production efficiency.
The flow divider is divided into two sub-flow dividers, and a single-direction flow channel is formed by an adapter. The flow channel design makes way for the valve needle drive mechanism. The adapter has a simple structure and is easy to process. It uses an anti-overflow ring and a sealing ring for sealing and positioning. The fixed structure design simplifies the processing.
This achieves smooth valve needle drive mechanism clearance, reduces processing and time costs, improves production efficiency, ensures smooth and uniform fluid flow in the flow channel, and reduces steps and overflow phenomena in the flow channel.
Smart Images
Figure CN223507595U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of hot runner technology, and more particularly to a hot runner system. Background Technology
[0002] Valve needle-type hot runner systems typically use a hydraulic or pneumatic cylinder to drive a piston, which in turn moves a valve needle inside the hot nozzle, thus controlling the flow path. In existing technologies, the hydraulic or pneumatic cylinder is located close to the hot nozzle, and the seals within it are prone to aging and failure under heat, leading to hot runner system malfunctions.
[0003] To improve this structure, such as Figure 1 In this design, the flow divider is divided into two sub-flow dividers (1' and 3'), which makes the flow channel inside the flow divider turn at right angles twice to make way for the lever above the valve needle. However, this structure requires high machining tolerances and has a high scrap rate, resulting in high machining and time costs, which affects production efficiency. Summary of the Invention
[0004] The purpose of this application is to provide a hot runner system that connects the internal flow channels of the first manifold, the adapter, and the second manifold to ultimately form the flow channel of the manifold. The adapter has a simple structure and is easy to process, which solves the problem of complex manifold structure and high scrap rate in the prior art due to the need to make way for lever components.
[0005] To achieve one of the above-mentioned objectives, one embodiment of this application provides a hot runner system, comprising:
[0006] The first flow divider plate forms the first flow channel;
[0007] The adapter has an adapter channel extending in a single direction, one end of which is connected to a first channel.
[0008] The second flow divider has a second flow channel, which is connected to the other end of the transfer flow channel. The opening of the second flow channel and the other end of the transfer flow channel are on the same side as the opening of the first flow channel and the other end of the transfer flow channel.
[0009] In one embodiment of this application, a first clearance cavity is provided at one end of the first flow channel and the connecting flow channel, a second clearance cavity and a third clearance cavity are respectively provided at both ends of the connecting flow channel, and a fourth clearance cavity is provided at one end of the second flow channel and the connecting flow channel. The hot runner system further includes a first anti-overflow ring and a second anti-overflow ring, with both ends of the first anti-overflow ring respectively disposed in the first clearance cavity and the second clearance cavity, and both ends of the second anti-overflow ring respectively disposed in the third clearance cavity and the fourth clearance cavity.
[0010] In one embodiment of this application, the inner diameter of the first flow channel = the inner diameter of the first anti-overflow ring = the inner diameter of the transition flow channel = the inner diameter of the second anti-overflow ring = the inner diameter of the second flow channel.
[0011] In one embodiment of this application, the adapter is provided with a first sealing groove and a second sealing groove surrounding the second relief cavity and the third relief cavity, respectively. The first sealing groove opens toward the first flow divider plate, and the second sealing groove opens toward the second flow divider plate. The hot runner system also includes a first sealing ring and a second sealing ring respectively disposed in the first sealing groove and the second sealing groove.
[0012] In one embodiment of this application, the thickness of the first sealing ring in its axial direction is greater than the depth of the first sealing groove, the thickness of the second sealing ring in its axial direction is greater than the depth of the second sealing groove, and the hardness of the materials of the first sealing ring and the second sealing ring is less than any one of the first diverter plate, the second diverter plate and the adapter.
[0013] In one embodiment of this application, the first diverter plate, the adapter, and the second diverter plate are respectively provided with at least one first fixing hole, a second fixing hole, and a third fixing hole, and the first diverter plate, the adapter, and the second diverter plate are fixed through the first fixing hole, the second fixing hole, and the third fixing hole.
[0014] In one embodiment of this application, at least one first fixing hole is provided with a first positioning cavity near one end of the second fixing hole, and a second positioning cavity and a third positioning cavity are respectively provided at both ends of the second fixing hole corresponding to the first fixing hole with the first positioning cavity, and a fourth positioning cavity is provided at one end of the third fixing hole corresponding to the second fixing hole with the third positioning cavity. The hot runner system also includes at least one first positioning ring and at least one second positioning ring, with both ends of the first positioning ring disposed in the first positioning cavity and the second positioning cavity, and both ends of the second positioning ring disposed in the third positioning cavity and the fourth positioning cavity.
[0015] In one embodiment of this application, four of each of the first, second, and third fixing holes are provided. On the cross-section of the transfer channel, the four first, second, and third fixing holes are evenly spaced on the outer periphery of the transfer channel, and at least two sets of the four first, second, and third fixing holes are provided with the aforementioned first positioning ring and second positioning ring.
[0016] In one embodiment of this application, the first flow divider is further provided with a first clearance hole communicating with the first flow channel, and the hot runner system further includes a main nozzle passing through the first clearance hole, the main nozzle communicating with the first flow channel.
[0017] In one embodiment of this application, the main nozzle includes a nozzle portion and a support portion. The nozzle portion is connected to a first flow channel, and the support portion extends from one end of the nozzle portion to a second flow divider plate until it abuts against the second flow divider plate.
[0018] One or more technical solutions provided in this application have at least the following technical effects or advantages:
[0019] In the hot runner system provided in this application, the first manifold, the adapter, and the second manifold constitute the manifold in the prior art. The internal flow channels of the three are connected to form the internal flow channel of the manifold. The openings of the first and second flow channels in the first and second manifolds, away from the adapter, are on the same side of the adapter. This satisfies the problem of making way for the valve needle drive mechanism when the axes of the main nozzle and the hot nozzle, which are respectively connected to the first and second flow channels, are close to each other. At the same time, since the direction of the adapter flow channel within the adapter is unidirectional, the adapter structure is simple, the processing is simple, it is not easy to produce scrap, and the processing cost is low. Attached Figure Description
[0020] Figure 1 This is a schematic diagram of the structure of a hot runner system in the prior art.
[0021] Figure 2 This is a schematic diagram of the hot runner system in an embodiment of this application.
[0022] Figure 3 yes Figure 2 Top view of the intermediate heat flow channel system.
[0023] Figure 4 yes Figure 3 Schematic diagram of cross section along line AA.
[0024] Figure 5 yes Figure 4 Enlarged view of section B in the middle.
[0025] Figure 6 yes Figure 4 Enlarged view of point C in the middle.
[0026] Figure 7 yes Figure 3 Schematic diagram of cross section along line DD.
[0027] Figure 8 yes Figure 7 Enlarged view of point E in the middle.
[0028] Figure 9 yes Figure 7 Enlarged view of point F in the middle.
[0029] 1. First flow divider plate; 11. First flow channel; 12. First clearance cavity; 13. First fixing hole; 14. First positioning cavity; 15. First clearance hole;
[0030] 2. Adapter; 21. Adapter flow channel; 22. Second clearance cavity; 23. Third clearance cavity; 24. First sealing groove; 25. Second sealing groove; 26. Second fixing hole; 27. Second positioning cavity; 28. Third positioning cavity;
[0031] 3. Second flow divider; 31. Second flow channel; 32. Fourth clearance cavity; 33. Third fixing hole; 34. Fourth positioning cavity; 35. Second clearance hole;
[0032] 41. First anti-overflow ring; 42. Second anti-overflow ring;
[0033] 51. First sealing ring; 52. Second sealing ring;
[0034] 61. First positioning circle; 62. Second positioning circle;
[0035] 71. First positioning component; 72. Second positioning component;
[0036] 8. Main nozzle; 81. Nozzle section; 82. Support section;
[0037] 9. Hot nozzle; 91. Valve needle. Detailed Implementation
[0038] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.
[0039] The terms used in this document, such as “center,” “upper,” “lower,” “front,” “rear,” “left,” “right,” “vertical,” “horizontal,” “top,” “bottom,” “inner,” and “outer,” indicating spatial relative positions, are used for illustrative purposes to describe the relationship of one unit or feature relative to another unit or feature as shown in the accompanying drawings. The terms “spatial relative positions” may be intended to include different orientations of the equipment in use or operation other than those shown in the figures.
[0040] For example, if the device in the figure is flipped, a unit described as being "below" or "under" other units or features will be "above" other units or features. Therefore, the exemplary term "below" can encompass both above and below orientations. The device may be oriented in other ways (rotated 90 degrees or otherwise) and the spatially related descriptive terms used herein will be interpreted accordingly.
[0041] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.
[0042] Furthermore, it should be understood that although the terms "first," "second," etc., may be used herein to describe various elements or structures, the objects being described should not be limited by these terms. These terms are only used to distinguish these objects from one another. For example, a first flow channel may be referred to as a second flow channel, and similarly, a second flow channel may be referred to as a first flow channel, without departing from the scope of protection of this application.
[0043] This application provides a hot runner system, such as Figures 2-4 As shown, the device includes a first flow divider 1, a transition piece 2, and a second flow divider 3 connected in sequence. The first flow divider 1 forms a first flow channel 11. The transition piece 2 forms a transition flow channel 21 extending in a single direction, with one end of the transition flow channel 21 connected to the first flow channel 11. The second flow divider 3 forms a second flow channel 31, which is connected to the other end of the transition flow channel 21. The opening at the other end of the second flow channel 31 connected to the transition flow channel 21 and the opening at the other end of the first flow channel 11 connected to the transition flow channel 21 face the same side as the transition flow channel 21.
[0044] The hot runner system provided in this application connects the first flow channel 11, the transition flow channel 21, and the second flow channel 31 to form a flow channel. The ends of the first flow channel 11 and the second flow channel 31 away from the transition flow channel 21 are located on the same side of the transition flow channel 21. This makes the axes of the main nozzle 8, which communicates with the first flow channel 11, and the hot nozzle 9, which communicates with the second flow channel 31, close to each other, thus meeting the production requirements. At the same time, the design of the flow channel allows for the space to accommodate the drive mechanism of the valve needle 91 inside the hot nozzle 9. More importantly, since the extension direction of the transition flow channel 21 is singular, the structure of the transition piece 2 is simple. Only the transition flow channel 21, the connection structure (fixing hole hereinafter) connecting the first flow divider plate 1 and the second flow divider plate 3, and the positioning structure (positioning cavity hereinafter) need to be machined. These structures are all conventional structures, simple to machine, and have controllable tolerances.
[0045] In one embodiment of this application, a first clearance cavity 12 is provided at one end of the first flow channel 11 and the transition flow channel 21, a second clearance cavity 22 and a third clearance cavity 23 are respectively provided at both ends of the transition flow channel 21, and a fourth clearance cavity 32 is provided at one end of the second flow channel 31 and the transition flow channel 21. The hot runner system also includes a first anti-overflow ring 41 and a second anti-overflow ring 42. The two ends of the first anti-overflow ring 41 are respectively provided in the first clearance cavity 12 and the second clearance cavity 22, and the two ends of the second anti-overflow ring 42 are respectively provided in the third clearance cavity 23 and the fourth clearance cavity.
[0046] When the adapter 2 is connected to the first flow divider 1 and the second flow divider 3, both ends of the adapter 2 abut against the ends of the first flow divider 1 and the second flow divider 3, respectively. That is, both ends of the adapter 2 are in surface contact with the first flow divider 1 and the second flow divider 3. During connection, the adapter channel 21 and the first flow channel 11 and the second flow channel 31 are prone to misalignment, resulting in steps in the flow channels and causing glue residue. A first anti-overflow ring 41 and a second anti-overflow ring 42 are provided at the connection between the adapter channel 21 and the first flow channel 11 and the second flow channel 31. On the one hand, this can prevent fluid from overflowing from the contact surface. On the other hand, it can also play a positioning role during installation. For example, the first anti-overflow ring 41 is first inserted into the first clearance cavity 12 of the first flow divider 1, and then the second clearance cavity 22 of the adapter 2 is aligned with the first anti-overflow ring 41.
[0047] In one embodiment of this application, the inner diameter of the first flow channel 11 is equal to the inner diameter of the first anti-overflow ring 41, the inner diameter of the transition flow channel 21, the inner diameter of the second anti-overflow ring 42, and the inner diameter of the second flow channel 31. Since the inner diameters of the first flow channel 11, the first anti-overflow ring 41, the transition flow channel 21, the second anti-overflow ring 42, and the second flow channel 31 are all equal, there is no change in the cross-sectional area of the flow channel during fluid flow, resulting in smoother and more uniform flow.
[0048] In one embodiment of this application, the adapter 2 is provided with a first sealing groove 24 and a second sealing groove 25 surrounding the second relief cavity 22 and the third relief cavity 23, respectively. The first sealing groove 24 opens toward the first flow divider 1, and the second sealing groove 25 opens toward the second flow divider 3. The hot runner system also includes a first sealing ring 51 and a second sealing ring 52 respectively disposed in the first sealing groove 24 and the second sealing groove 25.
[0049] A first sealing groove 24 and a second sealing groove 25 are arranged around the second and third clearance cavities 22 and 23, respectively. Double protection is achieved through the first sealing ring 51 and the second sealing ring 52. Even if the first anti-overflow ring 41 or the second anti-overflow ring 42 is damaged, the first sealing ring 51 and the second sealing ring 52 can still prevent overflow. The first sealing groove 24 and the second sealing groove 25 can be circular, square, or other shapes; simply surrounding the second and third clearance cavities 22 and 23 is sufficient to achieve the anti-overflow effect.
[0050] In one embodiment of this application, the thickness of the first sealing ring 51 in its axial direction is greater than the depth of the first sealing groove 24, the thickness of the second sealing ring 52 in its axial direction is greater than the depth of the second sealing groove 25, and the hardness of the materials of the first sealing ring 51 and the second sealing ring 52 is less than any one of the first diverter plate 1, the second diverter plate 3 and the adapter 2.
[0051] The thickness of the first sealing ring 51 and the second sealing ring 52 is greater than the depth of the first sealing groove 24 and the second sealing groove 25, respectively. When the first diverter plate 1 and the second diverter plate 3 are not installed, the first sealing ring 51 and the second sealing ring 52 protrude from the first sealing groove 24 and the second sealing groove 25, respectively. Furthermore, the hardness of the first sealing ring 51 and the second sealing ring 52 is relatively small, both less than that of the first diverter plate 1, the second diverter plate 3, and the adapter 2. After the first diverter plate 1 and the second diverter plate 3 are installed, the first diverter plate 1 and the adapter 2 cooperate to compress the first sealing ring 51, and the second diverter plate 3 and the adapter 2 cooperate to compress the second sealing ring 52, causing the first sealing ring 51 and the second sealing ring 52 to be compressed and deformed. This allows the two ends of the first sealing ring 51 to be in close contact with the first diverter plate 1 and the adapter 2, respectively, and the two ends of the second sealing ring 52 to be in close contact with the second diverter plate 3 and the adapter 2, respectively, thus achieving a sealing effect. Figure 5 , 6 The first sealing ring 51 and the second sealing ring 52 are both of the thickness before compression and fit with the first sealing groove 24 and the second sealing groove 25.
[0052] In one embodiment of this application, the first diverter plate 1, the adapter 2, and the second diverter plate 3 are respectively provided with at least one first fixing hole 13, a second fixing hole 26, and a third fixing hole 33. The first diverter plate 1, the adapter 2, and the second diverter plate 3 are fixed together through the first fixing hole 13, the second fixing hole 26, and the third fixing hole 33. Figure 7 In this configuration, the first distributor plate 1, the adapter 2, and the second distributor plate 3 are secured by slender bolts that pass sequentially through the first fixing hole 13, the second fixing hole 26, and the third fixing hole 33. Alternatively, other fasteners can be used to connect the first fixing hole 13, the second fixing hole 26, and the third fixing hole 33. Furthermore, one of the first fixing hole 13 and the third fixing hole 33 can be a fixing groove structure; that is, one of the first fixing hole 13 and the third fixing hole 33 does not necessarily have to form a through-hole structure.
[0053] Furthermore, at least one first fixing hole 13 is provided with a first positioning cavity 14 near one end of the second fixing hole 26, and the two ends of the second fixing hole 26 corresponding to the first fixing hole 13 with the first positioning cavity 14 are respectively provided with a second positioning cavity 27 and a third positioning cavity 28, and one end of the third fixing hole 33 corresponding to the second fixing hole 26 with the third positioning cavity 28 is provided with a fourth positioning cavity 34. The hot runner system also includes at least one first positioning ring 61 and at least one second positioning ring 62, with both ends of the first positioning ring 61 disposed in the first positioning cavity 14 and the second positioning cavity 27, and both ends of the second positioning ring 62 disposed in the third positioning cavity 28 and the fourth positioning cavity 34.
[0054] The first fixing hole 13, the second fixing hole 26, and the third fixing hole 33 are respectively set as a set of fixing holes. The first diverter plate 1, the adapter 2, and the second diverter plate 3 are provided with at least one set of fixing holes. Among them, the first fixing hole 13 and the second fixing hole 26 are provided with a first positioning ring 61, and the second fixing hole 26 and the third fixing hole 33 are provided with a second positioning ring 62, so that the first diverter plate 1, the adapter 2, and the second diverter plate 3 can be positioned by the first positioning ring 61 and the second positioning ring 62 during installation. The positioning method during installation is the same as the positioning of the first flow channel 11 and the adapter flow channel 21 in the example above. That is, the first positioning ring 61 is first set in the first positioning cavity 14 of the first diverter plate 1, and then the second positioning cavity 27 of the adapter 2 is aligned with the first positioning ring 61.
[0055] Going further, such as Figure 3 In the middle, four of each of the first fixing hole 13, the second fixing hole 26, and the third fixing hole 33 are provided. Figure 3 The top view shows the third fixing hole 33 of the second flow divider 3; on the cross-section of the transition channel 21, four first fixing holes 13, second fixing holes 26, and third fixing holes 33 are evenly spaced around the outer periphery of the transition channel 21, and at least two sets of the four first fixing holes 13, second fixing holes 26, and third fixing holes 33 are provided with the aforementioned first positioning ring 61 and second positioning ring 62. Using at least two sets of fixing holes for positioning prevents deflection between the first flow divider 1, the transition component 2, and the second flow divider 3. Figure 3 Among the four sets of fixing holes, the first positioning ring 61 and the second positioning ring 62 are provided at the positions of the two sets of fixing holes at the lower left and upper right. By setting the first positioning ring 61 and the second positioning ring 62 at diagonal positions, the deviation caused by tolerance can be minimized.
[0056] In one embodiment of this application, the first flow divider 1 is further provided with a first clearance hole 15 communicating with the first flow channel 11. The hot runner system also includes a main nozzle 8 passing through the first clearance hole 15. The main nozzle 8 is communicating with the first flow channel 11 and is connected to the injection molding machine to receive fluid from the injection molding machine and introduce it into the flow channel.
[0057] The main nozzle 8 includes a nozzle section 81 and a support section 82. The nozzle section 81 is connected to the first flow channel 11, and the support section 82 extends from one end of the nozzle section 81 toward the second flow divider 3 until it abuts against the second flow divider 3. The nozzle section 81 has the same structure and effect as a conventional main nozzle 8. Since the main nozzle 8 is connected to the injection molding machine, the connection pressure is very high in order to ensure sealing. Therefore, the support section 82 that abuts against the second flow divider 3 is provided at the end of the nozzle section 81 near the second flow divider 3 to prevent the first flow divider and the second flow divider 3 from being deflected relative to the adapter 2 due to the force between them.
[0058] In one embodiment of this application, as Figure 4 In the process, a first positioning element 71 and a second positioning element 72 are respectively provided on opposite sides of the first flow divider 1 and the second flow divider 3. Since the first flow divider 1 and the second flow divider 3 are designed as separate units, positioning is required between each unit and the structure to which they are connected to, in order to increase the overall accuracy of the hot runner system. The first positioning element 71 and the second positioning element 72 are both on the axis of the transition channel 21.
[0059] It should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This way of describing the specification is only for clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.
[0060] The detailed descriptions listed above are merely specific descriptions of feasible implementation methods of this application and are not intended to limit the scope of protection of this application. All equivalent implementation methods or modifications made without departing from the spirit of the art of this application should be included within the scope of protection of this application.
Claims
1. A hot runner system, characterized in that, include: The first flow divider plate forms the first flow channel; The adapter has an adapter channel extending in a single direction, one end of which is connected to a first channel. The second flow divider has a second flow channel, which is connected to the other end of the transfer flow channel. The opening of the second flow channel and the other end of the transfer flow channel are on the same side as the opening of the first flow channel and the other end of the transfer flow channel.
2. The hot runner system according to claim 1, characterized in that, The first flow channel is provided with a first clearance cavity at one end connected to the transition flow channel, the two ends of the transition flow channel are respectively provided with a second clearance cavity and a third clearance cavity, and the two ends of the second flow channel are provided with a fourth clearance cavity. The hot runner system also includes a first anti-overflow ring and a second anti-overflow ring. The two ends of the first anti-overflow ring are respectively provided in the first clearance cavity and the second clearance cavity, and the two ends of the second anti-overflow ring are respectively provided in the third clearance cavity and the fourth clearance cavity.
3. The hot runner system according to claim 2, characterized in that, The inner diameter of the first flow channel = the inner diameter of the first anti-overflow ring = the inner diameter of the transition flow channel = the inner diameter of the second anti-overflow ring = the inner diameter of the second flow channel.
4. The hot runner system according to claim 2, characterized in that, The adapter has a first sealing groove and a second sealing groove at both ends, which surround the second and third relief cavities, respectively. The first sealing groove opens toward the first flow divider plate, and the second sealing groove opens toward the second flow divider plate. The hot runner system also includes a first sealing ring and a second sealing ring respectively disposed in the first and second sealing grooves.
5. The hot runner system according to claim 4, characterized in that, The thickness of the first sealing ring in its axial direction is greater than the depth of the first sealing groove, the thickness of the second sealing ring in its axial direction is greater than the depth of the second sealing groove, and the hardness of the materials of the first sealing ring and the second sealing ring is less than that of any one of the first diverter plate, the second diverter plate and the adapter.
6. The hot runner system according to claim 1, characterized in that, The first diverter plate, the adapter, and the second diverter plate are respectively provided with at least one first fixing hole, a second fixing hole, and a third fixing hole, and the first diverter plate, the adapter, and the second diverter plate are fixed through the first fixing hole, the second fixing hole, and the third fixing hole.
7. The hot runner system according to claim 5, characterized in that, At least one first fixing hole is provided with a first positioning cavity at one end near the second fixing hole. The second fixing hole corresponding to the first fixing hole with the first positioning cavity is provided with a second positioning cavity and a third positioning cavity at both ends respectively. The third fixing hole corresponding to the second fixing hole with the third positioning cavity is provided with a fourth positioning cavity at one end. The hot runner system also includes at least one first positioning ring and at least one second positioning ring. The two ends of the first positioning ring are provided in the first positioning cavity and the second positioning cavity, and the two ends of the second positioning ring are provided in the third positioning cavity and the fourth positioning cavity.
8. The hot runner system according to claim 7, characterized in that, There are four of each of the first, second, and third fixing holes. On the cross-section of the transfer channel, the four first, second, and third fixing holes are evenly spaced on the outer periphery of the transfer channel, and at least two sets of the four first, second, and third fixing holes are provided with the aforementioned first and second positioning rings.
9. The hot runner system according to claim 1, characterized in that, The first manifold is also provided with a first clearance hole communicating with the first flow channel. The hot runner system also includes a main nozzle passing through the first clearance hole, and the main nozzle is communicating with the first flow channel.
10. The hot runner system according to claim 9, characterized in that, The main nozzle includes a nozzle section and a support section. The nozzle section is connected to the first flow channel, and the support section extends from one end of the nozzle section to the second flow divider until it abuts against the second flow divider.