Hot runner system and injection molding device
The movement of the valve needle is controlled by the hot runner system, and the one-time molding of the sandwich product is achieved, solving the problem of poor fusion between the sandwich material and the outer layer material, and improving production efficiency and product strength.
Patent Information
- Application Number
- CN202422430372.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-09
- Publication Date
- 2025-07-25
- Estimated Expiration
- 2034-10-09
AI Technical Summary
In the prior art, the production process of interlayer products is complex, the production efficiency is low, and the interlayer material has poor fusion properties with the outer layer material, which affects the product strength.
A hot runner system is adopted, including a driving assembly, a valve needle and a hot nozzle. By controlling the vertical movement of the valve needle, the diversion and merge of the first plastic and the second plastic are realized, ensuring that the second plastic wraps the first plastic surface and forms a sandwich injection molding product.
It realizes the one-time molding of interlayer products, simplifies the process flow, improves production efficiency, and improves the integration and strength of the products.
Smart Images
Figure CN223147644U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of injection molds, in particular to a hot runner system and an injection device. Background Art
[0002] With the wide application of plastic products, waste plastic products have caused serious environmental pollution problems. Therefore, it is necessary to recycle and reuse waste plastic materials.
[0003] Currently, waste plastics are usually melted as sandwich materials, and high-quality plastics are used as outer layer materials to produce sandwich products. The specific production method is as follows: First, the injection molding of the sandwich is completed, and then the formed sandwich is taken out and placed in the outer layer injection mold, and the outer layer material is injected to cover the surface of the sandwich. This production method not only has a complex process and low production efficiency, but also easily leads to poor fusion between the sandwich material and the outer layer material, affecting the product strength.
[0004] Therefore, there is an urgent need to propose a hot runner system and an injection device to solve the above problems. Summary of the Utility Model
[0005] The purpose of the utility model is to provide a hot runner system and an injection device, which can form a sandwich product in one step, and has a simple process, can improve production efficiency and product strength.
[0006] To achieve this purpose, the utility model adopts the following technical solutions:
[0007] A hot runner system includes:
[0008] A driving component;
[0009] A valve pin;
[0010] A hot nozzle, in which a first feed port, a second feed port, a first flow channel and a second flow channel are provided. The valve pin is slidably arranged vertically in the hot nozzle. The output end of the driving component is connected to the valve pin to drive the valve pin to move vertically. The upper part of the valve pin is in sealing cooperation with the hot nozzle. A first flow channel is formed between the lower part of the valve pin and the hot nozzle. The first feed port is communicated with the first flow channel, and a first discharge port is provided at the lower end of the first flow channel. The second feed port is communicated with the second flow channel, and a second discharge port is provided at the lower end of the second flow channel. The first discharge port is communicated with the second discharge port through the second flow channel. The lower end of the valve pin can sequentially pass through the first discharge port and the second discharge port to have a first position for closing the first discharge port and the second discharge port, a second position for closing the first discharge port and opening the second discharge port, and a third position for opening the first discharge port and the second discharge port.
[0011] Further, the first flow channel includes a first internal flow channel and a first end flow channel that are connected and communicate with each other. The second flow channel includes a second internal flow channel and a second end flow channel that are connected and communicate with each other. The hot nozzle includes an inner nozzle, an outer nozzle, and a nozzle tip. The upper parts of the inner nozzle and the outer nozzle are coaxially nested and fitted with each other from inside to outside in sequence. The nozzle tip and the lower part of the outer nozzle are coaxially nested and fitted with each other from inside to outside in sequence, and the lower end of the nozzle tip abuts against the lower end of the inner nozzle. A first internal flow channel is formed between the valve pin and the inner nozzle. A second internal flow channel is formed between the inner nozzle and the outer nozzle. A first end flow channel and a second end flow channel are formed in the nozzle tip. The first discharge port is located at the lower end of the first end flow channel. The second discharge port is located at the lower end of the second end flow channel.
[0012] Further, the second end flow channel includes an upper end flow channel and a lower end flow channel that are connected and communicate with each other. The nozzle tip includes a nozzle tip body and a first outer ring. The nozzle tip body includes an inner ring, a second outer ring, and a connecting portion. The first end flow channel is formed in the inner ring. The second outer ring and the upper part of the inner ring are connected through the connecting portion, and an upper end flow channel is formed between the inner ring and the second outer ring. The first outer ring and the lower part of the inner ring are coaxially nested and fitted with each other from outside to inside in sequence, and the top of the first outer ring abuts against the bottom of the second outer ring. A lower end flow channel is formed between the lower part of the inner ring and the first outer ring. The second discharge port is provided at the lower end of the lower end flow channel.
[0013] Further, the nozzle tip body includes at least two connecting portions that are evenly spaced along the circumferential direction of the inner ring.
[0014] Optionally, each connecting portion extends vertically from top to bottom.
[0015] Optionally, each connecting portion extends from top to bottom in a counterclockwise direction, or each connecting portion extends from top to bottom in a clockwise direction.
[0016] Further, the upper end of the connecting portion gradually slopes downward from the middle to both sides; and / or,
[0017] The lower end of the connecting portion gradually slopes upward from the middle to both sides.
[0018] Further, an arc transition that is recessed into the connecting portion is provided at the connection between the middle of the connecting portion and the inner ring, and an arc transition that is recessed into the connecting portion is provided at the connection between the middle of the connecting portion and the second outer ring.
[0019] Further, the first flow channel further includes an upper flow channel communicating with the first internal flow channel, the hot nozzle further includes a flow channel plate, the first feed port, the second feed port, and the upper flow channel are all arranged in the flow channel plate, and the first feed port communicates with the upper flow channel.
[0020] An injection molding device includes a mold and a hot runner system as described in any one of the above, a cavity is formed in the mold, and both the first discharge port and the second discharge port can communicate with the cavity.
[0021] Advantages of the present utility model:
[0022] The present utility model provides a hot runner system and an injection molding device, including a driving assembly, a valve pin, and a hot nozzle. The hot nozzle is provided with a first feed port, a second feed port, a first flow channel, and a second flow channel. The valve pin is slidably arranged in the hot nozzle in the vertical direction. The output end of the driving assembly is connected to the valve pin to drive the valve pin to move in the vertical direction. The upper part of the valve pin is in sealing cooperation with the hot nozzle. A first flow channel is formed between the lower part of the valve pin and the hot nozzle. The first feed port communicates with the first flow channel, and a first discharge port is provided at the lower end of the first flow channel; the second feed port communicates with the second flow channel, and a second discharge port is provided at the lower end of the second flow channel. The first discharge port communicates with the second discharge port through the second flow channel. The lower end of the valve pin can sequentially pass through the first discharge port and the second discharge port to have a first position for closing the first discharge port and the second discharge port, a second position for closing the first discharge port and opening the second discharge port, and a third position for opening the first discharge port and the second discharge port. When the valve pin is in the first position, the lower end of the valve pin closes the first discharge port and the second discharge port to close the outlets of the first flow channel and the second flow channel; when the valve pin is in the second position, the lower end of the valve pin closes the first discharge port to close the outlet of the first flow channel, the second flow channel communicates with the second discharge port, and the second plastic in the second flow channel can flow out through the second feed hole; when the valve pin is in the third position, the first flow channel communicates with the first discharge port, the second flow channel communicates with the second discharge port, the first plastic in the first flow channel enters the end of the second flow channel through the first discharge port and flows out through the second discharge port. By controlling the injection pressures of the first plastic and the second plastic, making the injection pressure of the first plastic greater than the injection pressure of the second plastic, the first plastic can enter the interior of the second plastic, and the second plastic wraps around the surface of the first plastic, thereby forming a sandwich injection molded product. The above settings enable the sandwich product to be formed in one step, with a simple process, which can improve production efficiency; and the molten second plastic directly wraps the molten first plastic, and the first plastic and the second plastic have good fusion and adhesion, which is beneficial to improving the product strength. Description of the drawings
[0023] Figure 1 is a schematic structural diagram of the injection device provided by the present utility model;
[0024] Figure 2 is a cross-sectional view of the hot runner system provided by the present utility model;
[0025] Figure 3 is a schematic internal structure diagram of the nozzle of the present utility model;
[0026] Figure 4 is a schematic structural diagram of the valve pin of the present utility model in the second position;
[0027] Figure 5 is a schematic structural diagram of the valve pin of the present utility model in the third position;
[0028] Figure 6 is a schematic structural diagram of the valve pin of the present utility model in the first position.
[0029] In the figure:
[0030] 100, the first plastic; 200, the second plastic;
[0031] 1, drive assembly; 11, cylinder; 12, solenoid valve; 2, valve pin; 3, hot nozzle; 31, inner injection nozzle; 32, outer injection nozzle; 33, nozzle; 331, nozzle body; 3311, inner ring; 3312, second outer ring; 3313, connecting portion; 332, first outer ring; 34, runner plate; 4, first feed port; 5, second feed port; 6, first runner; 61, first internal runner; 62, first end runner; 63, upper runner; 7, second runner; 71, second internal runner; 72, second end runner; 721, upper end runner; 722, lower end runner; 8, first discharge port; 9, second discharge port;
[0032] 10, mold; 101, cavity; 102, upper template; 103, lower template
[0033] 20, cylinder plate; 30, hot runner mounting plate. Detailed implementation manners
[0034] The present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the present utility model, rather than limiting the present utility model. Additionally, it should be noted that for the sake of description, only parts related to the present utility model rather than all structures are shown in the drawings.
[0035] In the description of the present utility model, unless otherwise clearly defined and limited, the terms "connected", "connected to", and "fixed" shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.
[0036] In the present utility model, unless otherwise clearly defined and limited, the first feature being "above" or "below" the second feature may include the direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through other features therebetween. Moreover, the first feature being "above", "over", and "on" the second feature includes that the first feature is directly above and obliquely above the second feature, or merely indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature being "under", "beneath", and "underneath" the second feature includes that the first feature is directly below and obliquely below the second feature, or merely indicates that the horizontal height of the first feature is less than that of the second feature.
[0037] In the description of this embodiment, the orientation or positional relationships such as "upper", "lower", "right", etc. are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of description and simplifying the operation, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.
[0038] As Figures 1 to 2 shown, this embodiment provides a hot runner system, which includes a driving assembly 1, a valve pin 2, and a nozzle 3. The nozzle 3 is provided with a first feed port 4, a second feed port 5, a first flow channel 6, and a second flow channel 7. The valve pin 2 is slidably arranged in the nozzle 3 in the vertical direction. The output end of the driving assembly 1 is connected to the valve pin 2 to drive the valve pin 2 to move in the vertical direction. The upper part of the valve pin 2 is in sealing cooperation with the nozzle 3. A first flow channel 6 is formed between the lower part of the valve pin 2 and the nozzle 3. The first feed port 4 is communicated with the first flow channel 6, and a first discharge port 8 is provided at the lower end of the first flow channel 6; the second feed port 5 is communicated with the second flow channel 7, and a second discharge port 9 is provided at the lower end of the second flow channel 7. The first discharge port 8 is communicated with the second discharge port 9 through the second flow channel 7. The lower end of the valve pin 2 can sequentially pass through the first discharge port 8 and the second discharge port 9 to have a first position for closing the first discharge port 8 and the second discharge port 9, a second position for closing the first discharge port 8 and opening the second discharge port 9, and a third position for opening the first discharge port 8 and the second discharge port 9.
[0039] AsFigures 4 to 6 Combined Figure 2 As shown, the first plastic 100 is injected into the first feed port 4. The first plastic 100 can enter the first flow channel 6 communicated with the first feed port 4. The second plastic 200 is injected into the second feed port 5. The second plastic 200 can enter the second flow channel 7 communicated with the second feed port 5. When the valve needle 2 is in the first position, the lower end of the valve needle 2 closes the first discharge port 8 and the second discharge port 9 to close the outlets of the first flow channel 6 and the second flow channel 7. When the valve needle 2 is in the second position, the lower end of the valve needle 2 closes the first discharge port 8 to close the outlet of the first flow channel 6. The second flow channel 7 is communicated with the second discharge port 9, and the second plastic 200 in the second flow channel 7 can flow out through the second discharge port 9. When the valve needle 2 is in the third position, the first flow channel 6 is communicated with the first discharge port 8, and the second flow channel 7 is communicated with the second discharge port 9. The first plastic 100 in the first flow channel 6 enters the end of the second flow channel 7 through the first discharge port 8. By controlling the injection pressures of the first plastic 100 and the second plastic 200, making the injection pressure of the first plastic 100 greater than that of the second plastic 200, the first plastic 100 can enter the interior of the second plastic 200, and the second plastic 200 wraps around the surface of the first plastic 100 and simultaneously flows out through the second discharge port 9 to form a sandwich product. The above settings enable the sandwich product to be formed in one step, with a simple process and improved production efficiency. Moreover, the molten second plastic 200 directly wraps the molten first plastic 100, and the first plastic 100 and the second plastic 200 have good fusion and adhesion, which is beneficial to improving the product strength.
[0040] In addition, the hot runner system of this embodiment can also achieve color mixing injection molding. By controlling the injection pressures of the first plastic 100 and the second plastic 200, making the injection pressure of the first plastic 100 equal to that of the second plastic 200, the first plastic 100 can be mixed with the second plastic 200 at the end of the second flow channel 7 and in the second discharge port 9 to form color mixing injection molding.
[0041] As Figure 2As shown, the first runner 6 includes a first internal runner 61 and a first end runner 62 that are in communication with each other. The second runner 7 includes a second internal runner 71 and a second end runner 72 that are in communication with each other. The hot nozzle 3 includes an inner nozzle 31, an outer nozzle 32, and a nozzle tip 33. The upper parts of the inner nozzle 31 and the outer nozzle 32 are coaxially nested and fitted with each other from inside to outside in sequence. The lower part of the nozzle tip 33 and the outer nozzle 32 are coaxially nested and fitted with each other from inside to outside in sequence, and the lower end of the nozzle tip 33 abuts against the lower end of the inner nozzle 31. A first internal runner 61 is formed between the valve pin 2 and the inner nozzle 31. A second internal runner 71 is formed between the inner nozzle 31 and the outer nozzle 32. A first end runner 62 and a second end runner 72 are formed in the nozzle tip 33. The first discharge port 8 is located at the lower end of the first end runner 62. The second discharge port 9 is located at the lower end of the second end runner 72. By assembling the inner nozzle 31, the outer nozzle 32, and the nozzle tip 33 to form the first runner 6 and the second runner 7, the processing difficulty can be reduced, and disassembly and assembly are facilitated, so that it is convenient to clean the first runner 6 and the second runner 7, and it is convenient to perform separate maintenance or replacement on the inner nozzle 31, the outer nozzle 32, or the nozzle tip 33.
[0042] Further, as Figure 2 shown in combination with Figure 3 As shown, the second end runner 72 includes an upper end runner 721 and a lower end runner 722 that are in communication with each other. The nozzle tip 33 includes a nozzle tip body 331 and a first outer ring 332. The nozzle tip body 331 includes an inner ring 3311, a second outer ring 3312, and a connecting portion 3313. The first end runner 62 is formed in the inner ring 3311. The upper part of the second outer ring 3312 and the inner ring 3311 are connected by the connecting portion 3313, and an upper end runner 721 is formed between the inner ring 3311 and the second outer ring 3312. The lower part of the first outer ring 332 and the inner ring 3311 are coaxially nested and fitted with each other from outside to inside in sequence, and the top of the first outer ring 332 abuts against the bottom of the second outer ring 3312. A lower end runner 722 is formed between the lower part of the inner ring 3311 and the first outer ring 332. The second discharge port 9 is provided at the lower end of the lower end runner 722. By setting the nozzle tip 33 to include a separable nozzle tip body 331 and a first outer ring 332, the processing difficulty can be further reduced, and disassembly and assembly of the nozzle tip 33 are facilitated, so that it is convenient to clean the first runner 6 and the second runner 7, and it is convenient to perform maintenance or replacement on the nozzle tip 33; by setting the top of the first outer ring 332 to abut against the bottom of the second outer ring 3312, positioning of the first outer ring 332 and the second outer ring 3312 in the vertical direction can be achieved, which is convenient for assembly.
[0043] To improve the connection strength between the inner ring 3311 and the second outer ring 3312, the nozzle body 331 includes at least two connecting portions 3313 that are evenly spaced circumferentially along the inner ring 3311 to connect the second outer ring 3312 and the inner ring 3311. The connecting portions 3313 are evenly spaced circumferentially along the inner ring 3311, so that the upper end portion flow channel 721 is evenly divided, enabling the second plastic 200 to flow evenly in each part of the second end portion flow channel 72, avoiding uneven flow velocity and flow rate of the second plastic 200, preventing the effect of the second plastic 200 on wrapping the first plastic 100, and thus ensuring the quality of the sandwich product. In this embodiment, the nozzle body 331 includes three connecting portions 3313 that are evenly spaced circumferentially along the inner ring 3311, which can ensure the connection strength between the inner ring 3311 and the second outer ring 3312 and avoid hindering the flow of the second plastic 200. Optionally, according to the requirements of the connection strength and the size of the inner ring 3311, the number of the connecting portions 3313 can also be two, four, five, etc., which is not limited here.
[0044] In this embodiment, each connecting portion 3313 extends vertically from top to bottom, so that the second plastic 200 can maintain a vertical flow direction after passing through the upper end portion flow channel 721 without generating eddy currents, avoiding agitation and mixing of the second plastic 200 and the first plastic 100, and thus ensuring the wrapping effect of the second plastic 200 on the first plastic 100.
[0045] In another embodiment, when the hot runner system is used to produce color-mixed products, each connecting portion 3313 extends from top to bottom along the counterclockwise direction, or each connecting portion 3313 extends from top to bottom along the clockwise direction, so that the second plastic 200 can flow downward rotationally after passing through the upper end portion flow channel 721, making the second plastic 200 produce an agitation and mixing effect on the first plastic 100, improving the mixing efficiency of the second plastic 200 and the first plastic 100, and thus improving the production efficiency of the color-mixed products. Similarly, due to the separable design of the nozzle body 331 and the first outer ring 332, different nozzle bodies 331 or nozzles 33 can be replaced to switch the production mode to produce color-mixed products or sandwich products.
[0046] Furthermore, the upper end of the connecting portion 3313 gradually slopes downward from the middle to both sides to avoid hindering the flow of the second plastic 200, thereby increasing the flow velocity of the second plastic 200 and making the flow rate of the second plastic 200 on both sides of each connecting portion 3313 the same. In addition, it can also prevent the second plastic 200 from adhering to the upper end surface of the connecting portion 3313 and prevent material accumulation.
[0047] Similarly, the lower end of the connecting portion 3313 gradually slopes upward from the middle to both sides, which is beneficial to improving the flow rate of the second plastic 200 from the upper end flow channel 721 into the lower end flow channel 722, and avoiding the adhesion of the second plastic 200 to the lower end surface of the connecting portion 3313 to prevent material accumulation.
[0048] Furthermore, an arc transition recessed into the connecting portion 3313 is provided at the connection between the middle portion of the connecting portion 3313 and the inner ring 3311, and an arc transition recessed into the connecting portion 3313 is also provided at the connection between the middle portion of the connecting portion 3313 and the second outer ring 3312. This can make the connections between the middle portion of the connecting portion 3313 and the inner ring 3311 and the second outer ring 3312 smooth, avoid forming dead corners where material is likely to accumulate, and is beneficial to further improving the flow rate of the second plastic 200.
[0049] In addition, the first flow channel 6 further includes an upper flow channel 63 communicating with the first internal flow channel 61. The hot nozzle 3 further includes a flow channel plate 34. The first feed port 4, the second feed port 5, and the upper flow channel 63 are all provided in the flow channel plate 34. The first feed port 4 communicates with the upper flow channel 63. By arranging the first feed port 4 and the second feed port 5 in the flow channel plate 34, it is convenient to assemble the hot runner system and to clean and repair the flow channel plate 34.
[0050] Furthermore, as Figure 1 shown, the hot runner system further includes a cylinder plate 20 and a hot runner mounting plate 30. The cylinder plate 20 is arranged on the hot runner mounting plate 30 for mounting the driving assembly 1, and the hot runner mounting plate 30 is used for mounting the hot nozzle 3 to facilitate the installation and fixation of the driving assembly 1 and the hot nozzle 3.
[0051] Among them, the driving assembly 1 includes a cylinder 11 and a solenoid valve 12. The output end of the solenoid valve 12 is connected to the input end of the cylinder 11 for controlling the gas flow rate and gas pressure entering the cylinder 11, thereby controlling the cylinder 11 to drive the valve needle 2 to move. In other embodiments, the driving assembly 1 includes, but is not limited to, a motor, a hydraulic cylinder, or an electric cylinder, etc., which are not limited herein.
[0052] This embodiment also provides an injection molding device, including a mold 10. A cavity 101 is formed in the mold 10, and both the first discharge port 8 and the second discharge port 9 can communicate with the cavity 101.
[0053] Specifically, the mold 10 includes an upper template 102 and a lower template 103. After the mold is closed, a cavity 101 is formed between the upper template 102 and the lower template 103.
[0054] The following is the operation process of the injection molding device for producing sandwich products:
[0055] First, in the initial state, the valve needle 2 is in the first position, and the valve needle 2 is driven by the driving assembly to reach the second position (asFigure 4 As shown in the figure, start injecting the second plastic 200;
[0056] Secondly, when the injection volume of the second plastic 200 reaches 1 / 4 to 2 / 5 of the total weight of the product, the driving component 1 drives the valve needle 2 to the third position, and the first plastic 100 and the second plastic 200 are injected simultaneously. By controlling the injection pressures of the first plastic 100 and the second plastic 200, the injection pressure of the first plastic 100 is made greater than that of the second plastic 200, so that the first plastic 100 enters the interior of the second plastic 200, and the second plastic 200 wraps around the surface of the first plastic 100 (as Figure 5 shown);
[0057] Then, when the injection volume of the first plastic 100 reaches 1 / 4 to 2 / 5 of the total weight of the product, the driving component 1 drives the valve needle 2 to the second position, and continue to inject the second plastic 200;
[0058] Finally, until the second plastic 200 fills the cavity 101, the driving component 1 drives the valve needle 2 to the first position, and the injection molding is completed (as Figure 6 shown).
[0059] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, rather than limitations on the implementation manners of the present invention. For those of ordinary skill in the art, various obvious changes, re-adjustments and substitutions can be made without departing from the protection scope of the present invention. It is not necessary and impossible to enumerate all the implementation manners here. Any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the claims of the present invention.
Claims
1. A hot runner system, characterized in that, Comprising: A driving component (1); A valve pin (2); A hot nozzle (3), in which a first feed port (4), a second feed port (5), a first flow channel (6) and a second flow channel (7) are provided. The valve pin (2) is slidably arranged vertically in the hot nozzle (3). The output end of the driving component (1) is connected to the valve pin (2) to drive the valve pin (2) to move vertically. The upper part of the valve pin (2) is in sealing cooperation with the hot nozzle (3). A first flow channel (6) is formed between the lower part of the valve pin (2) and the hot nozzle (3). The first feed port (4) is communicated with the first flow channel (6), and a first discharge port (8) is provided at the lower end of the first flow channel (6). The second feed port (5) is communicated with the second flow channel (7), and a second discharge port (9) is provided at the lower end of the second flow channel (7). The first discharge port (8) is communicated with the second discharge port (9) through the second flow channel (7). The lower end of the valve pin (2) can sequentially pass through the first discharge port (8) and the second discharge port (9) to have a first position for closing the first discharge port (8) and the second discharge port (9), a second position for closing the first discharge port (8) and opening the second discharge port (9), and a third position for opening the first discharge port (8) and the second discharge port (9).
2. The hot runner system according to claim 1, wherein The first flow channel (6) includes a connected first internal flow channel (61) and a first end flow channel (62). The second flow channel (7) includes a connected second internal flow channel (71) and a second end flow channel (72). The hot nozzle (3) includes an inner nozzle (31), an outer nozzle (32) and a nozzle tip (33). The upper parts of the inner nozzle (31) and the outer nozzle (32) are coaxially nested and matched with each other from inside to outside in sequence. The nozzle tip (33) and the lower part of the outer nozzle (32) are coaxially nested and matched with each other from inside to outside in sequence, and the nozzle tip (33) abuts against the lower end of the inner nozzle (31). A first internal flow channel (61) is formed between the valve pin (2) and the inner nozzle (31). A second internal flow channel (71) is formed between the inner nozzle (31) and the outer nozzle (32). A first end flow channel (62) and a second end flow channel (72) are formed in the nozzle tip (33). The first discharge port (8) is located at the lower end of the first end flow channel (62). The second discharge port (9) is located at the lower end of the second end flow channel (72).
3. The hot runner system according to claim 2, characterized in that, The second end portion runner (72) includes an upper end portion runner (721) and a lower end portion runner (722) that are communicated with each other. The nozzle (33) includes a nozzle body (331) and a first outer ring (332). The nozzle body (331) includes an inner ring (3311), a second outer ring (3312), and a connecting portion (3313). The first end portion runner (62) is formed in the inner ring (3311). The second outer ring (3312) is connected to the upper portion of the inner ring (3311) through the connecting portion (3313). An upper end portion runner (721) is formed between the inner ring (3311) and the second outer ring (3312). The first outer ring (332) and the lower portion of the inner ring (3311) are coaxially nested and fitted with each other from outside to inside in sequence. The top of the first outer ring (332) abuts against the bottom of the second outer ring (3312). A lower end portion runner (722) is formed between the lower portion of the inner ring (3311) and the first outer ring (332). The second discharge port (9) is provided at the lower end of the lower end portion runner (722).
4. The hot runner system according to claim 3, characterized in that, The nozzle body (331) includes at least two connecting portions (3313) that are evenly spaced along the circumference of the inner ring (3311).
5. The hot runner system according to claim 3, characterized in that, Each connecting portion (3313) extends vertically from top to bottom.
6. The hot runner system according to claim 3, wherein Each connecting portion (3313) extends from top to bottom in a counterclockwise direction, or each connecting portion (3313) extends from top to bottom in a clockwise direction.
7. The hot runner system according to claim 3, characterized in that, The upper end of the connecting portion (3313) gradually inclines downward from the middle to both sides; and / or The lower end of the connecting portion (3313) gradually inclines upward from the middle to both sides.
8. The hot runner system according to claim 3, characterized in that, An arc transition that is recessed into the connecting portion (3313) is provided at the connection between the middle of the connecting portion (3313) and the inner ring (3311), and an arc transition that is recessed into the connecting portion (3313) is provided at the connection between the middle of the connecting portion (3313) and the second outer ring (3312).
9. The hot runner system according to any one of claims 2 to 8, characterized in that, The first runner (6) further includes an upper runner (63) that is communicated with the first internal runner (61). The hot nozzle (3) further includes a runner plate (34). The first feed port (4), the second feed port (5), and the upper runner (63) are all provided in the runner plate (34). The first feed port (4) is communicated with the upper runner (63).
10. An injection molding device, characterized in that, It includes a mold (10) and a hot runner system as described in any one of claims 1 to 9. A cavity (101) is formed in the mold (10). Both the first discharge port (8) and the second discharge port (9) can be communicated with the cavity (101).