Needle valve hot runner structure and injection molding equipment

Abstract

The utility model relates to the field of injection molding equipment, and discloses a needle valve hot runner structure and injection molding equipment. The needle valve hot runner structure comprises a needle valve unit and a splitter plate assembly. The needle valve unit comprises a needle valve and a driving part, the driving part is used for driving the needle valve to do linear motion, a melt flow channel and a needle valve channel which are mutually independent are formed in the splitter plate assembly, the melt flow channel is used for containing melt, the needle valve penetrates through the needle valve channel and is in sliding connection with the needle valve channel, and the needle valve is used for blocking the liquid outlet end of the needle valve channel; the melt flow channel is communicated with the liquid outlet end of the needle valve channel, and the melt flow channel and the needle valve channel are mutually independent, so that the melt in the flow channel is not influenced by a needle valve, and uniform distribution of the melt is realized. And the driving piece can accurately control the outflow of the melt, so that the stability of the injection molding process and the consistency of products are ensured, and the quality and yield of the products are improved.

Description

Needle valve hot runner structure and injection molding equipment Technical Field

[0001] This utility model relates to the field of injection molding equipment, and in particular to a needle valve hot runner structure and injection molding equipment. Background Technology

[0002] In modern manufacturing, injection molding, with its efficient and high-precision molding process, is widely used in numerous fields such as automotive, electronics, and medical, and has become a key force driving industrial development. With increasing industry competition, companies are placing higher demands on the quality, production efficiency, and cost control of injection-molded products. To meet these needs, hot runner systems for injection molding have emerged. Hot runner systems use heating to keep the molten plastic in a molten state within the runner, reducing waste and improving molding efficiency. The single-runner concentric valve needle is a key component in the needle valve hot runner system. While the single-runner concentric valve needle achieves a certain degree of precise control over the gate, its drawbacks have gradually become apparent in practical applications. Although the concentricity between the valve needle and the runner is ideally designed, impurities in the molten plastic tend to accumulate in the gap between the valve needle and the runner during long-term use, causing blockages.

[0003] Currently, some hot runner structures exist where the needle valve channel and melt flow channel are set up independently. The needle valve passes through the needle valve channel, which is connected to the melt flow channel. A sealing block is set on the needle valve to block the melt flow channel. When injection molding is about to begin, a corresponding force is applied to the needle valve to move the sealing element relative to it, thereby allowing the melt to flow out from the outlet and thus achieving injection molding. However, the above setup can only achieve injection molding at the point where the needle valve can be provided with force, and the above setup cannot accurately control the flow of the melt.

[0004] Therefore, there is an urgent need for a needle valve hot runner structure that can solve the problem of not being able to precisely control the flow of melt, improve the stability of the injection molding process and the consistency of the product, and improve the quality and yield of the product. Summary of the Invention

[0005] The purpose of this invention is to provide a needle valve hot runner structure that can solve the problem of not being able to precisely control the flow of melt, improve the stability of the injection molding process and the consistency of the product, and improve the quality and yield of the product.

[0006] Based on the above concept, the technical solution adopted by this utility model is as follows:

[0007] A needle valve hot runner structure, comprising:

[0008] A needle valve unit, comprising a needle valve and a drive unit, the drive unit being used to drive the needle valve to perform linear motion;

[0009] The manifold assembly has a melt flow channel and a needle valve channel with independent input ends. The melt flow channel is used to contain melt, and the needle valve is inserted into the needle valve channel and slidably connected to the manifold assembly. The needle valve is used to block the liquid outlet end of the needle valve channel, and the melt flow channel is connected to the liquid outlet end of the needle valve channel.

[0010] As an optional solution for the hot runner structure of the needle valve, the needle valve channel includes a connected sliding part and a dispensing port. The opening direction of the dispensing port coincides with the axial direction of the sliding part. The needle valve is inserted into both the sliding part and the dispensing port. The needle valve is used to block the dispensing port. The melt flow channel is connected to the end of the sliding part that is connected to the dispensing port.

[0011] As an alternative to the hot runner structure of the needle valve, the flow plate assembly also includes a guide member, which is circumferentially arranged on the inner wall of the sliding part, and is used to guide the movement direction of the needle valve.

[0012] As an alternative to the hot runner structure of this needle valve, the drive component is a pneumatic valve.

[0013] As an alternative to the needle valve hot runner structure, the melt flow channel includes a first flow channel and a second flow channel, with the first flow channel connected to the second flow channel.

[0014] As an alternative to the needle valve hot runner structure, the needle valve hot runner structure includes:

[0015] The first flow divider plate has the first flow channel inside it;

[0016] The second flow divider plate has the second flow channel and the needle valve channel. The driving component is connected to the second flow divider plate.

[0017] A flow channel connector is provided, through which the first flow divider plate and the second flow divider plate are connected, and the flow channel connector is used to connect the first flow channel and the second flow channel.

[0018] As an alternative to the needle valve hot runner structure, the second flow divider includes a first fastening member and a second fastening member that are fastened together. After the first fastening member and the second fastening member are fastened together, the second flow channel and the needle valve channel are formed.

[0019] As an alternative to the needle valve hot runner structure, the needle valve hot runner structure also includes a seal that is fitted around the outer periphery of the liquid outlet end of the manifold assembly.

[0020] As an alternative to the needle valve hot runner structure, the needle valve hot runner structure also includes a hot nozzle adjustment component, which is disposed on the manifold assembly.

[0021] An injection molding machine includes a main body and a needle valve hot runner structure, the needle valve hot runner structure being disposed on the main body of the machine.

[0022] The beneficial effects of this utility model are as follows:

[0023] This invention proposes a needle valve hot runner structure. The needle valve unit includes a needle valve and a drive component. The drive component drives the needle valve to move linearly. An independent melt flow channel and needle valve channel are formed on the manifold assembly. The melt flow channel accommodates the melt. The needle valve passes through the needle valve channel and is slidably connected to it. The needle valve seals the outlet end of the needle valve channel. The melt flow channel and the outlet end of the needle valve channel are connected. Because the melt flow channel and the needle valve channel are independent, when the needle valve moves linearly within the needle valve channel to seal or open, it will not directly contact the melt and interfere with its flow in the channel, achieving uniform melt distribution and ensuring stable melt flow according to the designed path and state. The drive component can precisely control the melt outflow, ensuring the stability of the injection molding process and product consistency, thereby improving product quality and yield. Attached Figure Description

[0024] Figure 1 is a first structural schematic diagram of the needle valve hot runner structure provided in an embodiment of the present invention;

[0025] Figure 2 is a schematic diagram of the second structure of the needle valve hot runner structure provided in an embodiment of the present invention.

[0026] In the picture:

[0027] 1. Needle valve unit; 11. Needle valve; 12. Drive unit;

[0028] 2. Manifold assembly; 201. Melt channel; 2011. First channel; 2012. Second channel; 21. First manifold; 22. Second manifold; 221. Needle valve channel; 2211. Sliding part; 2212. Dispenser; 222. Guide; 223. First fastening part; 224. Second fastening part; 23. Channel connector;

[0029] 3. Diverter plate positioning component; 4. Diverter plate fixing component; 5. Screw washer; 6. Seal component; 7. Hot nozzle adjustment component. Detailed Implementation

[0030] To make the technical problem solved by this utility model, the technical solution adopted, and the technical effect achieved clearer, the technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are merely for explaining this utility model and not for limiting it. Furthermore, it should be noted that, for ease of description, only the parts related to this utility model are shown in the accompanying drawings, not all of them.

[0031] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0032] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0033] In the description of this embodiment, the terms "upper," "lower," "left," and "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0034] The technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.

[0035] This embodiment provides an injection molding device applicable to numerous fields such as automotive, electronics, and medical, to drip thermoplastic or thermosetting plastics into a molding die to create plastic products of various shapes. In this embodiment, the injection molding device includes a main body and a needle valve hot runner structure. The needle valve hot runner structure is mounted on the main body and can precisely control the melt flow at each gate by opening and closing the needle valve 11. During the injection molding process, the time, speed, and flow rate of the molten plastic entering the mold cavity can be accurately controlled according to the product's shape, thickness, and process requirements, thereby improving the molding quality and consistency of the product.

[0036] To precisely control the flow of the melt, as shown in Figure 1, in this embodiment, the needle valve hot runner structure includes a needle valve unit 1 and a flow divider assembly 2. The needle valve unit 1 includes a needle valve 11 and a drive component 12. The drive component 12 drives the needle valve 11 to move linearly. The flow divider assembly 2 has a melt flow channel 201 and a needle valve channel 221 with independent input ends. The melt flow channel 201 is used to contain the melt. The needle valve 11 passes through the needle valve channel 221 and is slidably connected to the flow divider assembly 2. The needle valve 11 is used to block the liquid outlet end of the needle valve channel 221. The melt flow channel 201 is connected to the liquid outlet end of the needle valve channel 221. Since the melt flow channel and the needle valve channel 221 are independent of each other, when the needle valve 11 moves linearly in the needle valve channel 221 to block or open, it will not directly contact the melt and interfere with the melt flow in the channel, thus achieving uniform distribution of the melt and ensuring that the melt can flow stably in the channel according to the designed path and state. The drive unit 12 can precisely control the flow of melt, ensuring the stability of the injection molding process and the consistency of the product, thereby improving the product quality and yield.

[0037] Specifically, as shown in Figures 1-2, in this embodiment, the needle valve channel 221 includes a connected sliding part 2211 and a glue outlet 2212. The opening direction of the glue outlet 2212 coincides with the axial direction of the sliding part 2211. The needle valve 11 is simultaneously inserted into the sliding part 2211 and the glue outlet 2212. The needle valve 11 is used to block the glue outlet 2212. The melt flow channel 201 is connected to the end of the sliding part 2211 that is connected to the glue outlet 2212. The opening direction of the glue outlet 2212 coincides with the axial direction of the sliding part 2211, so that the melt can flow out stably in a specific direction when it flows out, avoiding product defects caused by unstable glue outlet direction. The melt flow channel 201 is connected to the end of the sliding part 2211 that is connected to the glue outlet 2212. This connection method allows the melt to smoothly enter the sliding part 2211 from the melt flow channel 201 and finally flow out from the glue outlet 2212. Reducing the resistance and turbulence of the melt during the flow process is beneficial to improving injection molding efficiency and reducing energy consumption. It also helps to avoid local overheating or undercooling caused by poor melt flow, thus improving product quality. The needle valve 11 is inserted into the sliding part 2211 and the outlet 2212 and can block the outlet 2212. By sliding the needle valve 11 in the sliding part 2211, the opening and closing degree of the outlet 2212 can be precisely controlled, thereby accurately controlling the amount of melt flowing out of the outlet 2212. This is conducive to achieving high-precision injection molding and ensuring the stability and consistency of product quality.

[0038] Preferably, as shown in Figures 1-2, in this embodiment, a guide member 222 is circumferentially provided on the inner wall of the sliding part 2211. The guide member 222 is used to guide the movement direction of the needle valve 11. The guide member 222 can restrict the needle valve 11 to move only in a specific direction, ensuring the accuracy of its movement trajectory, achieving stable and precise dispensing control, and improving the consistency of product quality. By guiding the movement of the needle valve 11, the guide member 222 can make the force on the needle valve 11 more even during movement, avoiding unnecessary friction and collision between the needle valve 11 and the inner wall of the sliding part 2211, thereby reducing the wear of the needle valve 11, extending its service life, and reducing maintenance costs.

[0039] Optionally, as shown in Figures 1-2, in this embodiment, the guide member 222 is a ring-shaped structure. The outer wall of the ring is circumferentially fitted to the inner wall of the sliding part 2211. The inner diameter of the ring is larger than the maximum outer diameter of the needle valve 11. The ring-shaped structure can form a uniform guiding space around the needle valve 11. No matter how the needle valve 11 moves within the sliding part 2211, it can be ensured to move along the central axis of the ring, achieving precise linear guidance and ensuring that the needle valve 11 is always aligned with the dispensing port 2212, maintaining good sealing and opening / closing control. The inner diameter of the ring is larger than the maximum outer diameter of the needle valve 11, providing sufficient room for the needle valve 11 to move freely back and forth within the ring without being obstructed due to insufficient space, ensuring the smooth movement of the needle valve 11. In other embodiments, the guide member 222 can also be a fan-shaped guide plate or a linear guide rail, as long as it can guide the sliding direction of the needle valve 11.

[0040] Optionally, in this embodiment, the driving component 12 is a pneumatic valve. By adjusting the pressure and flow rate of compressed air, the movement of the pneumatic valve can be precisely controlled, thereby accurately controlling the moving speed and position of the needle valve 11. It can also precisely control the opening and closing degree between the needle valve 11 and the dispensing port 2212, meeting the precise requirements of different injection molding processes for dispensing volume and dispensing time. The pneumatic valve can quickly respond to control signals, enabling the needle valve 11 to open and close rapidly, which helps improve the efficiency of injection molding production and product quality. In other embodiments, the driving component 12 can also be a motor or cylinder, as long as it can drive the needle valve 11 to reciprocate relative to the flow divider assembly 2 within the needle valve channel 221.

[0041] Optionally, as shown in Figures 1-2, in this embodiment, the melt flow channel 201 includes a first flow channel 2011 and a second flow channel 2012. The first flow channel 2011 and the second flow channel 2012 are connected. The shape, size, and layout of the two flow channels can be designed more flexibly according to the actual mold structure and molding requirements. Dividing the melt flow channel 201 into two segments reduces the processing difficulty compared to an integral flow channel. Each flow channel segment can adopt different processing methods and processes, which can improve processing efficiency and processing accuracy. When the flow channel is blocked, worn, or has other faults, the segmented flow channel facilitates inspection and maintenance. The two flow channels can be equipped with heating devices and temperature control systems respectively, so that the temperature of each flow channel segment can be precisely controlled according to the flow characteristics of the melt in different flow channel segments and molding requirements. In other embodiments, the melt flow channel 201 can also be an integral flow channel, as long as the melt can flow smoothly within the melt flow channel.

[0042] Specifically, as shown in Figures 1-2, in this embodiment, the needle valve hot runner structure includes a first flow divider 21, a second flow divider 22, and a flow channel connector 23. The first flow divider 21 has a first flow channel 2011, the second flow divider 22 has a second flow channel 2012, and the second flow divider 22 also has a needle valve channel 221. The drive unit 12 is connected to the second flow divider 22. The first flow divider 21 and the second flow divider 22 are connected by the flow channel connector 23. The flow channel connector 23 is used to connect the first flow channel 2011 and the second flow channel 2012. The first flow divider 21 initially divides the melt from the main flow channel of the injection molding machine according to the layout of the mold cavity, so that the melt can be initially and evenly distributed to each branch flow channel, preparing for further precise distribution to the hot nozzle. The first flow divider 21 enables the melt to be better distributed and temperature regulated before entering the hot nozzle, providing a stable melt supply for the subsequent injection molding process. The second manifold 22 is responsible for smoothly transitioning and guiding the upstream melt to subsequent components, ensuring that the melt flows along a predetermined path and avoiding turbulence, backflow, and other phenomena, thus guaranteeing the stability and accuracy of melt flow. Connecting the first flow channel 2011 of the first manifold 21 and the second flow channel 2012 of the second manifold 22 creates a continuous channel network for the entire needle valve hot runner structure, allowing the melt to flow smoothly from the main flow channel of the injection molding machine through each manifold and finally to the hot nozzle. Because the flow channel connector 23 ensures smooth and stable melt flow, the ideal process state can be reached more quickly during the pre-production debugging phase, reducing the number of debugging sessions and time, and accelerating the production schedule.

[0043] Preferably, as shown in Figure 2, in this embodiment, the second flow divider 22 includes a first fastening member 223 and a second fastening member 224 that are fastened together. After the first fastening member 223 and the second fastening member 224 are fastened together, a second flow channel 2012 and a needle valve channel 221 are formed. Both the first fastening member 223 and the second fastening member 224 are connected to the drive member 12. After the first fastening member 223 and the second fastening member 224 are fastened together, the second flow channel 2012 and the needle valve channel 221 can be precisely formed. The second flow channel 2012 can further divide the melt and guide it to the hot nozzle, while the needle valve channel 221 provides space for the movement of the needle valve 11, realizing precise control of the melt injection cavity. By splitting the second flow divider 22 into the first fastening member 223 and the second fastening member 224, compared with the integrally formed structure, the shape and structure of each fastening member are simpler, reducing the processing difficulty. Separate processing allows for easier adoption of suitable processing techniques and equipment, thereby improving the processing accuracy of the second flow channel 2012 and the needle valve channel 221, ensuring the stability of melt flow and the smooth movement of the needle valve 11. When maintenance, cleaning, or component replacement is required inside the second manifold 22, the first and second fastening parts 223 and 224 can be easily separated, making the operation convenient and quick, reducing maintenance time and costs. The separated fastening parts can more thoroughly clean the second flow channel 2012 and the needle valve channel 221, effectively removing residual plastic, impurities, etc., from the flow channels, preventing residues from affecting melt flow and injection molding quality. In other embodiments, the second manifold 22 can be integrally molded, as long as it can achieve the injection molding function.

[0044] Preferably, as shown in Figure 1, in this embodiment, the needle valve hot runner structure further includes a manifold positioning component 3. The manifold positioning component 3 is connected to the second manifold 22 and engages with a positioning hole on the main body of the equipment. By connecting to the second manifold 22 and engaging with the positioning hole on the main body of the equipment, the displacement of the second manifold 22 in various directions, including axial, radial, and angular displacement, can be effectively restricted, ensuring that it maintains a fixed position and posture during injection molding and guaranteeing the precise connection between the manifold and other components. In this embodiment, the manifold positioning component 3 is a pin structure. In other embodiments, the manifold positioning component 3 can also be a bolt or key structure, as long as it can achieve the desired result.

[0045] Specifically, as shown in Figure 1, in this embodiment, the needle valve hot runner structure also includes a manifold fixing member 4, which firmly fixes the manifold to the equipment body, ensuring its stable position during injection molding. This prevents displacement, loosening, or shaking due to injection pressure, mechanical vibration, or other factors, ensuring a tight and reliable connection between the manifold and the equipment body, as well as other components in the needle valve hot runner structure. This guarantees smooth melt flow within the runner system and avoids gaps or misalignments at runner connections caused by manifold instability, thus maintaining the normal operation of the entire needle valve hot runner structure. In this embodiment, two manifold fixing members 4 are provided, each corresponding to one manifold, and the corresponding manifold is fixed to the equipment body. In other embodiments, three, four, or five manifold fixing members 4 can be provided, as long as they can stably fix the manifold assembly 2 to the equipment body.

[0046] Optionally, as shown in Figure 1, in this embodiment, the manifold fixing member 4 is a first screw. The screw can provide reliable fastening force, tightly connecting the manifold assembly 2 to the equipment body, effectively preventing the manifold assembly 2 from loosening or displacing due to external forces such as pressure and vibration during injection molding, and ensuring the stability of the needle valve hot runner structure. In other embodiments, the manifold fixing member 4 can also be a rivet or directly welded to the equipment body, as long as it can fix the manifold assembly 2.

[0047] Preferably, as shown in Figure 1, in this embodiment, the needle valve hot runner structure further includes a screw pad 5. The screw pad 5 is sleeved on the circumferential outside of the first screw, which can precisely adjust the distance between the manifold assembly 2 and the main body of the equipment or other related components, making the fit between the components tighter and more accurate. When tightening the first screw, the screw pad 5 can evenly distribute the pressure generated by the screw to the surface of the manifold assembly 2 and the components in contact with it, avoiding excessive local pressure. At the same time, it buffers the impact force during the screw tightening process, protecting the surface of the components from damage. By adjusting the distance and buffering the pressure, the manifold assembly 2 and other components are installed more firmly, reducing the loosening and shaking caused by uneven gaps or uneven forces between components, thereby ensuring the stability of the entire splicing structure and ensuring the normal operation of the needle valve hot runner structure.

[0048] Specifically, as shown in Figure 1, in this embodiment, the needle valve hot runner structure also includes a sealing element 6. The sealing element 6 is sleeved on the outer periphery of the liquid outlet end of the manifold assembly 2. The sealing element 6 on the outer periphery of the liquid outlet end of the manifold assembly 2 can form a tight sealing environment, which confines the melt in the needle valve hot runner structure within a specific flow channel and prevents it from leaking into the surrounding environment. Good sealing helps to maintain the pressure stability within the needle valve hot runner structure, ensuring that the melt can flow smoothly into the mold cavity under the set pressure, and ensuring the normal operation of the injection molding process.

[0049] Optionally, in this embodiment, the sealing element 6 is a sealing ring. The sealing ring is typically made of a material with high elasticity and corrosion resistance. It can fit tightly against the outer periphery of the manifold assembly 2, effectively preventing melt leakage even under high temperature and high pressure injection molding environments, and ensuring the sealing performance of the needle valve hot runner structure. The sealing ring is generally annular in structure. During installation, it only needs to be fitted onto the designated position of the manifold assembly 2. No complicated installation tools or processes are required, making the operation simple and quick, which helps to improve the assembly efficiency of the needle valve hot runner structure.

[0050] Specifically, as shown in Figure 1, in this embodiment, the needle valve hot runner structure also includes a hot nozzle adjusting component 7. The hot nozzle adjusting component 7 is mounted on the manifold assembly 2. It precisely adjusts the position of the hot nozzle to achieve the optimal relative position between the hot nozzle, the manifold assembly 2, and the mold cavity. This ensures that the melt flowing from the manifold assembly 2 accurately aligns with the mold cavity entrance, achieving precise injection molding. The hot nozzle adjusting component 7 provides stable support for the hot nozzle, preventing displacement or shaking during injection molding due to external forces such as melt pressure and mechanical vibration, thus ensuring the stability of the hot nozzle during operation. By fine-tuning the position and angle of the hot nozzle, the flow direction and velocity of the melt can be optimized, allowing the melt to enter the cavity evenly and avoiding problems such as excessively fast or slow local filling and uneven melt flow, thereby improving the quality of injection molding.

[0051] Optionally, in this embodiment, the hot nozzle adjusting component 7 is a hot nozzle pad. The hot nozzle adjusting component 7 is disposed on the circumferential side of the liquid outlet end of the manifold assembly 2. By selecting hot nozzle pads of different thicknesses, the position of the hot nozzle in the height direction can be precisely adjusted to achieve the optimal relative position with the mold cavity, ensuring that the melt can be accurately injected into the cavity and improving the precision of injection molding. The hot nozzle pad has high strength and rigidity, providing stable support for the hot nozzle and preventing displacement, shaking, or deformation of the hot nozzle during injection molding due to external forces such as melt pressure and mechanical vibration, ensuring the stability and reliability of the hot nozzle operation. Reasonably selecting the thickness and installation position of the hot nozzle pad allows for fine-tuning of the distance and angle between the hot nozzle and the cavity, thereby optimizing the melt flow path and speed, enabling the melt to fill the cavity evenly, reducing the possibility of defects such as bubbles, weld lines, and deformation in the product, and improving product quality. In other embodiments, the hot nozzle adjusting component 7 can also be a hot nozzle adjusting screw or an eccentric shaft adjusting mechanism, as long as it allows the hot nozzle to be adjusted to the appropriate position.

[0052] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A needle valve hot runner structure, characterized in that, include: A needle valve unit (1) includes a needle valve (11) and a drive member (12). The drive member (12) is used to drive the needle valve (11) to make linear motion. A flow divider assembly (2) has a melt flow channel (201) and a needle valve channel (221) with independent input ends. The melt flow channel (201) is used to contain melt. The needle valve (11) passes through the needle valve channel (221) and is slidably connected to the flow divider assembly (2). The needle valve (11) is used to block the liquid outlet end of the needle valve channel (221). The melt flow channel (201) is connected to the liquid outlet end of the needle valve channel (221).

2. The needle valve hot runner structure according to claim 1, characterized in that, The needle valve channel (221) includes a connected sliding part (2211) and a glue outlet (2212). The opening direction of the glue outlet (2212) coincides with the axial direction of the sliding part (2211). The needle valve (11) is inserted into both the sliding part (2211) and the glue outlet (2212). The needle valve (11) is used to block the glue outlet (2212). The melt flow channel (201) is connected to the end of the sliding part (2211) that is connected to the glue outlet (2212).

3. The needle valve hot runner structure according to claim 2, characterized in that, The diverter assembly (2) further includes a guide (222), which is circumferentially arranged on the inner wall of the sliding part (2211). The guide (222) is used to guide the movement direction of the needle valve (11).

4. The needle valve hot runner structure according to any one of claims 1-3, characterized in that, The driving component (12) is a pneumatic valve.

5. The needle valve hot runner structure according to any one of claims 1-3, characterized in that, The melt flow channel (201) includes a first flow channel (2011) and a second flow channel (2012), and the first flow channel (2011) and the second flow channel (2012) are connected.

6. The needle valve hot runner structure according to claim 5, characterized in that, The needle valve hot runner structure includes: a first flow divider plate (21), in which the first flow divider plate (21) has a first flow channel (2011); a second flow divider plate (22), in which the second flow divider plate (22) has a second flow channel (2012), and in which the needle valve channel (221) is also formed, and the driving member (12) is connected to the second flow divider plate (22); and a flow channel connector (23), in which the first flow divider plate (21) and the second flow divider plate (22) are connected, and the flow channel connector (23) is used to connect the first flow channel (2011) and the second flow channel (2012).

7. The needle valve hot runner structure according to claim 6, characterized in that, The second diverter plate (22) includes a first fastening member (223) and a second fastening member (224) that are fastened together. After the first fastening member (223) and the second fastening member (224) are fastened together, the second flow channel (2012) and the needle valve channel (221) are formed.

8. The needle valve hot runner structure according to any one of claims 1-3, characterized in that, The needle valve hot runner structure also includes a seal (6), which is sleeved on the outer periphery of the liquid outlet end of the flow divider assembly (2).

9. The needle valve hot runner structure according to any one of claims 1-3, characterized in that, The needle valve hot runner structure also includes a hot nozzle adjustment component (7), which is disposed on the manifold assembly (2).

10. An injection molding machine, characterized in that, It includes a device body and a needle valve hot runner structure as described in any one of claims 1-9, wherein the needle valve hot runner structure is disposed on the device body.

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