A three-point glue feeding needle valve hot runner practical device based on single cylinder driving

Abstract

The utility model relates to hot runner practical device field, and disclose a kind of three point glue injection needle valve hot runner practical device based on single cylinder drive, including panel, runner plate, A plate and external connection mechanism, glue injection mechanism, through the linkage structure of single cylinder drive combination shunt plate component and valve needle pressure block, realize the opening and closing of three glue injection point valve needles synchronous control of single power source, electromagnetic valve in external connection mechanism receives electric signal and drives piston, valve needle is driven to move up and down by valve needle pressure block, cooperate heat insulating plate with positioning ring to ensure movement accuracy, shunt plate component realizes the even shunt of molten plastic and temperature accurate control by symmetrical heating wire, anti-rotation shaft and center pin, modular hollow structure design is convenient to install maintenance, external connection mechanism and nameplate promote debugging efficiency, compared with traditional multi-cylinder drive system, the utility model simplifies mechanical structure, reduces fault point, high synchronism, can avoid uneven glue injection, temperature control instability and other problems, and improves the quality of injection molding product forming.

Description

Technical Field

[0001] This utility model relates to the field of hot runner practical devices, specifically a hot runner practical device based on a single-cylinder driven three-point glue injection needle valve. Background Technology

[0002] In the field of plastic injection molding, hot runner devices achieve efficient injection by controlling the flow path of molten plastic. The practical device of a three-point injection needle valve hot runner based on a single cylinder is a precision mold component that synchronously controls the opening and closing of three injection point valve needles through a single driving cylinder. Its core lies in the linkage structure of the manifold assembly and the valve needle pressure block, which transforms a single power source into the coordinated action of multiple valve needles, thereby achieving precise control of multi-point injection. As the precision injection molding industry increases its requirements for product quality, production efficiency and mold compactness, traditional multi-cylinder driven hot runner devices are gradually becoming unable to meet the needs due to their complex structure, high cost and cumbersome maintenance.

[0003] Traditional multi-point injection needle valve hot runner systems typically employ multiple independent drive cylinders to control the valve needles, resulting in complex structures, high maintenance costs, and difficulty in ensuring synchronization among the drive cylinders. This can easily lead to problems such as asynchronous valve needle movements and uneven injection, thus affecting product molding quality. Furthermore, the temperature control of traditional hot runner systems is often not precise enough, and overheating or cold material may occur in some areas, resulting in defects such as flow marks and shrinkage marks in injection molded products. In terms of installation and maintenance, traditional systems have low modularity, are cumbersome to disassemble and assemble, and have long debugging cycles, reducing production efficiency. To address these issues, we propose a practical three-point injection needle valve hot runner device based on a single-cylinder drive. Utility Model Content

[0004] (1) Technical problems to be solved

[0005] To address the shortcomings of existing technologies, this invention provides a practical device for a three-point glue injection needle valve hot runner based on single-cylinder drive, which solves the aforementioned problems.

[0006] (II) Technical Solution

[0007] To achieve the above-mentioned objectives, this utility model provides the following technical solution: a practical device for a three-point glue injection needle valve hot runner based on single-cylinder drive, including a panel, a runner plate, and an A plate. The runner plate is installed on the upper surface of the A plate, and the panel is fixedly installed on the upper surface of the runner plate. The panel, the runner plate, and the A plate are all hollow structures.

[0008] An external connection mechanism is provided on one side of the outer wall of the panel, the flow channel plate, and the A plate. The external connection mechanism includes a junction box and a solenoid valve. A junction box is fixedly installed on one side of the outer wall of the panel, the flow channel plate, and the A plate. A solenoid valve is fixedly installed on the outer wall of the panel, the flow channel plate, and the A plate on the same side, next to the junction box.

[0009] A heat insulation plate is fixedly installed on the top of the panel, and four circular holes arranged in a circumferential array are opened on the heat insulation plate.

[0010] A glue inlet mechanism is fixedly installed inside the panel, the flow channel plate, and the A plate. The glue inlet mechanism includes a hot runner assembly and a manifold assembly, and the manifold assembly is installed on the hot runner.

[0011] Preferably, four mold cores are fixedly installed in a rectangular shape inside the A plate;

[0012] The hot runner assembly includes a hot nozzle copper sleeve and valve pins. The valve pins are inserted into the mold core, and the distance between the four valve pins is ≤8.5mm. The hot nozzle copper sleeve is fixedly installed inside the mold core corresponding to the outer periphery of the valve pins.

[0013] Preferably, the hot runner assembly further includes a piston and a valve needle pressure block, wherein the valve needle pressure block is fixedly installed on the top surface of the valve needle, and a piston is sleeved below the valve needle pressure block corresponding to the periphery of the valve needle.

[0014] Preferably, a cylinder cover is fixedly installed on the top surface of the valve needle pressure block, and the cylinder cover corresponds to the four round holes opened on the heat insulation plate.

[0015] Preferably, the manifold assembly includes a manifold, manifold screws, and a manifold anti-rotation shaft. The manifold is fixedly installed inside the flow channel plate corresponding to the periphery of the four hot runner assemblies. The manifold has a connection hole, and the manifold screw passes through the connection hole on the manifold to fix the manifold and the flow channel plate. In order to prevent the manifold from rotating, a manifold anti-rotation shaft is also fixedly installed on it.

[0016] Preferably, the manifold assembly further includes a manifold heating wire, a manifold center pin, and a manifold center pin pad. The manifold heating wire is symmetrically fixedly installed on the upper and lower surfaces of the manifold. The manifold center pin pad is fixedly installed in the middle of the four hot runner assemblies on the bottom surface of the manifold. The manifold center pin is fixedly installed on the bottom surface of the manifold center pin pad, and the manifold center pin fixes the manifold assembly and the panel.

[0017] Preferably, a valve sleeve is also fixedly installed on the valve needle, and a valve sleeve pressure block is fixedly installed on the upper surface of the flow divider plate corresponding to the periphery of the valve needle.

[0018] Preferably, a fixed shaft is fixedly installed on the upper surface of the manifold corresponding to the middle of the four hot runner components, a positioning ring is fixedly installed on the top surface of the fixed shaft, and the bottom surface of the positioning ring is engaged with the outer arc of the four circular holes opened on the heat insulation plate.

[0019] Preferably, a nameplate is fixedly installed inside the flow channel plate next to the glue injection mechanism.

[0020] (III) Beneficial Effects

[0021] Compared with the prior art, this utility model provides a practical device for a three-point glue injection needle valve hot runner based on single-cylinder drive, which has the following beneficial effects:

[0022] 1. This practical device for a three-point glue injection needle valve hot runner based on single-cylinder drive adopts a single-cylinder drive three-point glue injection design. Through the linkage structure of the flow divider assembly and the valve needle pressure block, a single drive source can synchronously control multiple valve needles, which greatly simplifies the mechanical structure, reduces failure points, and improves the reliability and maintenance convenience of the system.

[0023] 2. This practical hot runner device based on a single-cylinder driven three-point injection needle valve features symmetrically mounted manifold heating wires on the upper and lower surfaces of the manifold assembly, along with a hot nozzle copper sleeve and valve sleeve pressure block. This ensures uniform heating of the molten plastic within the runner, preventing cold material or overheating. Furthermore, the manifold center pin and anti-rotation shaft further enhance the stability of the hot runner and the accuracy of temperature control, thereby optimizing the molding quality of the injection molded products.

[0024] 3. This practical device for a three-point glue injection needle valve hot runner based on a single-cylinder drive adopts a modular hollow structure design of panel, flow channel plate and A plate, and is fixed by the snap-fit ​​of positioning ring and heat insulation plate, which makes installation and disassembly more convenient. At the same time, the integrated design of external mechanism and nameplate facilitates on-site debugging and maintenance, and significantly improves production efficiency and equipment applicability. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the structure of this utility model;

[0026] Figure 2 This is a schematic diagram of the internal structure of this utility model;

[0027] Figure 3 This is an inverted schematic diagram of the internal structure of this utility model.

[0028] In the diagram: 1. Positioning ring; 2. Panel; 3. Flow channel plate; 4. A plate; 5. Heat insulation plate; 6. Junction box; 7. Solenoid valve; 8. Nameplate; 9. Mold core; 10. Hot nozzle copper sleeve; 11. Valve sleeve pressure block; 12. Manifold heating wire; 13. Piston; 14. Valve needle pressure block; 15. Cylinder head; 16. Manifold; 17. Manifold screw; 18. Manifold center pin; 19. Manifold center pin pad; 20. Valve needle; 21. Manifold anti-rotation shaft; 22. Valve sleeve. Detailed Implementation

[0029] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0030] Please see Figure 1-3 A practical device for a three-point glue injection needle valve hot runner based on single-cylinder drive includes a panel 2, a runner plate 3, and an A plate 4. The runner plate 3 is installed on the upper surface of the A plate 4, and the panel 2 is fixedly installed on the upper surface of the runner plate 3. The panel 2, the runner plate 3, and the A plate 4 are all hollow structures.

[0031] An external connection mechanism is set on one side of the outer wall of panel 2, flow channel plate 3, and A plate 4. The external connection mechanism includes a junction box 6 and a solenoid valve 7. The junction box 6 is fixedly installed on one side of the outer wall of panel 2, flow channel plate 3, and A plate 4. The solenoid valve 7 is fixedly installed next to the junction box 6 on the same side of the outer wall of panel 2, flow channel plate 3, and A plate 4.

[0032] A heat insulation plate 5 is fixedly installed on the top of panel 2, and the heat insulation plate 5 has four circular holes arranged in a circumferential array.

[0033] A glue inlet mechanism is fixedly installed inside panel 2, flow channel plate 3 and A plate 4. The glue inlet mechanism includes a hot runner assembly and a manifold assembly. The manifold assembly is installed on the hot runner.

[0034] Furthermore, four mold cores 9 are fixedly installed in a rectangular shape inside plate A4;

[0035] The hot runner assembly includes a hot nozzle copper sleeve 10 and a valve pin 20. The valve pin 20 is inserted into the mold core 9, and the distance between the four valve pins 20 is ≤8.5mm. The hot nozzle copper sleeve 10 is fixedly installed inside the mold core 9 corresponding to the outer periphery of the valve pin 20.

[0036] Furthermore, the hot runner assembly also includes a piston 13 and a valve needle block 14. The valve needle block 14 is fixedly installed on the top surface of the valve needle 20, and the piston 13 is sleeved below the valve needle block 14 corresponding to the periphery of the valve needle 20.

[0037] Furthermore, a cylinder head 15 is fixedly installed on the top surface of the valve needle pressure block 14, and the four round holes on the cylinder head 15 correspond to those on the heat insulation plate 5.

[0038] Furthermore, the manifold assembly includes a manifold 16, a manifold screw 17, and a manifold anti-rotation shaft 21. The manifold 16 is fixedly installed inside the flow channel plate 3 corresponding to the periphery of the four hot runner assemblies. The manifold 16 has a connection hole. The manifold screw 17 passes through the connection hole on the manifold 16 to fix the manifold 16 and the flow channel plate 3. In order to prevent the manifold 16 from rotating, the manifold anti-rotation shaft 21 is also fixedly installed on it.

[0039] Furthermore, the manifold assembly also includes a manifold heating wire 12, a manifold center pin 18, and a manifold center pin pad 19. The manifold heating wire 12 is symmetrically fixedly installed on the upper and lower surfaces of the manifold 16. The manifold center pin pad 19 is fixedly installed in the middle of the four hot runner assemblies on the bottom surface of the manifold 16. The manifold center pin 18 is fixedly installed on the bottom surface of the manifold center pin pad 19, and the manifold center pin 18 fixes the manifold assembly and the panel 2.

[0040] Furthermore, a valve sleeve 22 is fixedly installed on the valve needle 20, and a valve sleeve pressure block 11 is fixedly installed on the upper surface of the flow divider plate 16 corresponding to the periphery of the valve needle 20.

[0041] Furthermore, a fixed shaft is fixedly installed on the upper surface of the manifold 16 corresponding to the middle of the four hot runner components. A positioning ring 1 is fixedly installed on the top surface of the fixed shaft. The bottom surface of the positioning ring 1 is engaged with the outer arc of the four round holes opened on the heat insulation plate 5.

[0042] Furthermore, a nameplate 8 is fixedly installed inside the flow channel plate 3 next to the glue injection mechanism.

[0043] Structural Description:

[0044] Positioning ring 1: Positioning ring 1 is an annular positioning structure installed on the top of the fixed shaft on the upper surface of the flow divider plate 16. Its bottom surface is engaged with the outer arc of the circular hole of the heat insulation plate 5. It is used to accurately calibrate the relative position of the hot runner assembly and the heat insulation plate, ensure the coaxiality of the movement trajectory of the valve needle 20, and improve the assembly accuracy of the device.

[0045] Panel 2: Panel 2 is the top structural component of the device. It is a hollow plate and is fixed above the flow channel plate 3. It provides an installation reference surface for the internal glue injection mechanism. At the same time, it cooperates with the external mechanism (junction box 6, solenoid valve 7) to realize the integrated installation of electrical control components and ensure the overall sealing of the device.

[0046] Flow channel plate 3: Flow channel plate 3 is a hollow plate structure located between panel 2 and plate A 4. It houses the flow distribution plate assembly and hot runner assembly. It is fixedly connected to flow distribution plate 16 by flow distribution plate screw 17. It integrates external mechanisms on the side and is the core carrier for molten plastic flow distribution and hot runner temperature control.

[0047] A plate 4: A plate 4 is the bottom structural component, which is hollow plate. The upper surface is equipped with the runner plate 3. The four mold cores 9 are fixed in a rectangular array inside, providing motion guide holes for the valve needle 20. At the same time, it serves as the supporting foundation of the mold cavity and bears the pressure load during the injection process.

[0048] Heat insulation plate 5: The heat insulation plate 5 is fixed to the top of the panel 2. It is plate-shaped and has four circular array holes, which correspond to the position of the cylinder head 15. It has both heat insulation function and movement guidance function of valve needle drive mechanism, reducing heat transfer to the outside and ensuring the stability of drive system.

[0049] Junction Box 6: Junction Box 6 is an electrical connection assembly installed on the outer wall of one side of Panel 2, Flow Channel Plate 3, and A Plate 4. It is used to integrate the circuit harness of the device, provide safety protection and standardized interfaces, and facilitate the electrical connection between the external control system and the internal components such as heating wires and solenoid valves.

[0050] Solenoid valve 7: Solenoid valve 7 is installed close to junction box 6. As the actuator of pneumatic control system, it controls the flow of compressed air by receiving electrical signals, drives piston 13 to move, and thus synchronously controls the opening and closing of multiple valve needles 20 to achieve precise on / off control of glue injection point.

[0051] Nameplate 8: Nameplate 8 is fixed inside the flow channel plate 3 next to the glue injection mechanism. It is an identification component that records parameter information such as device model, specifications, and production date, so that equipment management and maintenance personnel can quickly identify device attributes and improve on-site commissioning and maintenance efficiency.

[0052] Mold core 9: The mold core 9 is rectangular and fixed inside the A plate 4. There are four of them. It is the cavity carrier for injection molding. The valve pin mounting hole is opened inside. The hot nozzle copper sleeve 10 is nested on the outside. Its precision directly affects the molding quality of the product and provides the final molding space for molten plastic.

[0053] Hot nozzle copper sleeve 10: The hot nozzle copper sleeve 10 is nested around the valve needle 20 inside the mold core 9. It is a metal sleeve structure with high thermal conductivity. It is used to conduct heat from the heating wire 12 of the manifold, maintain the temperature stability of the molten plastic in the valve needle area, and prevent cold material from clogging the inlet.

[0054] Valve sleeve clamping block 11: Valve sleeve clamping block 11 is fixed on the upper surface of the flow divider plate 16, corresponding to the periphery of the valve needle 20, and is used to clamp the valve sleeve 22 to ensure the radial positioning accuracy when the valve needle moves, prevent deviation in the amount of glue injected due to shaking, and improve the stability of the valve needle opening and closing.

[0055] Diverter plate heating wire 12: The diverter plate heating wire 12 is symmetrically installed on the upper and lower surfaces of the diverter plate 16. It is a resistance heating element that heats up through an external power supply, uniformly heats the diverter plate channel, and precisely controls the temperature of the molten plastic to avoid overheating, degradation or condensation.

[0056] Piston 13: Piston 13 is sleeved around the valve needle 20 and below the valve needle pressure block 14. It is the core component of pneumatic drive. It is driven by the air pressure controlled by the solenoid valve 7, which drives the valve needle pressure block 14 and the valve needle 20 to move up and down synchronously, so as to realize the linkage opening and closing of multiple glue inlet points.

[0057] Valve needle pressure block 14: Valve needle pressure block 14 is fixed to the top surface of valve needle 20. It has a block structure, connects piston 13 and cylinder head 15, transmits the driving force of piston to valve needle, and serves as a mechanical connection hub for the linkage of multiple valve needles to ensure synchronous movement accuracy.

[0058] Cylinder head 15: The cylinder head 15 is fixed to the top surface of the valve needle pressure block 14 and corresponds to the round hole of the heat insulation plate 5. It is the end cover structure for driving the cylinder, sealing the cylinder cavity and guiding the movement direction of the valve needle. At the same time, it provides an installation and positioning interface to ensure the stability of the drive mechanism.

[0059] Diverter plate 16: Diverter plate 16 is the core diverter element inside flow channel plate 3. It is plate-shaped and has flow channel holes and connection holes. It is fixed to the flow channel plate by diverter plate screws 17 and works with diverter plate anti-rotation shaft 21 to prevent rotation, so as to achieve uniform distribution of molten plastic from the main flow channel to multiple hot flow channels.

[0060] Diverter screw 17: Diverter screw 17 passes through the connecting hole of diverter 16 to fix diverter to flow channel plate 3. It is a high-strength fastener to ensure the installation reliability of diverter under high temperature and high pressure environment and maintain the structural stability of flow channel system.

[0061] Center pin 18 of the manifold: The center pin 18 of the manifold is fixed to the bottom surface of the center pin pad 19 of the manifold and inserted into the corresponding hole of the panel 2. It serves as the center positioning element of the manifold assembly, ensuring the coaxiality of the manifold and the panel and improving the assembly accuracy of the hot runner system.

[0062] Diverter plate center pin pad 19: The diverter plate center pin pad 19 is fixed to the center of the bottom surface of the diverter plate 16, supports the diverter plate center pin 18, adjusts the pin height, ensures that the pin and the positioning hole of the panel 2 are accurately matched, and disperses the installation stress of the diverter plate.

[0063] Valve pin 20: The valve pin 20 is inserted into the mold core 9. The top end is connected to the drive mechanism through the valve pin pressure block 14, and the bottom end is the opening and closing component of the glue inlet. It is driven to move up and down by the piston 13 to control the flow of molten plastic. Its movement accuracy directly affects the amount of glue injected and the quality of the product.

[0064] The manifold anti-rotation shaft 21 is fixed to the edge of the manifold 16 and inserted into the corresponding slot of the flow channel plate 3 to prevent the manifold from rotating due to the pressure of the melt during injection molding. This ensures that the relative position of the flow channel hole and the hot runner assembly is fixed and avoids uneven glue injection caused by flow channel deviation.

[0065] Valve sleeve 22: Valve sleeve 22 is fitted into the middle of valve needle 20 and is fixed to the upper surface of flow divider plate 16 by valve sleeve pressure block 11. It provides guidance and support for valve needle, reduces frictional loss during valve needle movement, and seals the gap between flow divider plate and valve needle to prevent molten material leakage.

[0066] Working principle: After receiving an external control signal, the solenoid valve 7 connects to the air circuit through the junction box 6, driving the piston 13 to move vertically under air pressure. The piston 13 pushes the valve needle pressure block 14, causing the three valve needles 20 to move up and down synchronously. The cylinder head 15 and the round hole of the heat insulation plate 5 cooperate to ensure the coaxiality of the valve needle movement trajectory. The single-cylinder drive design makes the actions of multiple valve needles 20 completely synchronized, avoiding the problem of uneven glue injection caused by response differences in traditional multi-cylinder systems.

[0067] After the manifold heating wire 12 is energized, it symmetrically heats the manifold 16. The heat is conducted to the mold core 9 area through the hot nozzle copper sleeve 10. The cooperation between the valve sleeve 22 and the valve sleeve pressure block 11 maintains the temperature around the valve needle 20 and prevents the molten material from condensing. The manifold center pin 18 and the anti-rotation shaft 21 ensure that the position of the manifold 16 is fixed, avoiding the flow channel displacement caused by thermal expansion, and realizing uniform heating and flow of molten plastic in the flow channel.

[0068] When the valve needle 20 is driven down by the piston 13, the inlet of the mold core 9 opens, and the molten plastic is injected into the cavity from the flow channel of the manifold 16 through the hot nozzle copper sleeve 10. When the valve needle 20 rises, the injection is cut off. The three-point synchronous injection is achieved by precisely controlling the opening and closing time. The snap-fit ​​structure between the positioning ring 1 and the heat insulation plate 5 ensures the consistency of the stroke of each valve needle, ensuring that the injection molded product is free of flow marks or shrinkage defects.

[0069] The hollow modular design of panel 2, flow channel plate 3 and A plate 4, together with the fixing of the flow divider screw 17 and center pin 18, forms a stable hot runner frame. The system parameters marked on the nameplate 8 facilitate quick debugging. The integrated layout of the external mechanism simplifies the maintenance process. The whole set of equipment achieves efficient and stable injection molding through the coordination of mechanical positioning and electrical control.

[0070] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A practical device for a three-point glue injection needle valve hot runner based on single-cylinder drive, characterized in that: include: Panel (2), flow channel plate (3), A plate (4), the flow channel plate (3) is installed on the upper surface of the A plate (4), the panel (2) is fixedly installed on the upper surface of the flow channel plate (3), and the panel (2), the flow channel plate (3), and the A plate (4) are all hollow structures. An external connection mechanism is provided on one side outer wall of the panel (2), the flow channel plate (3), and the A plate (4). The external connection mechanism includes a junction box (6) and a solenoid valve (7). A junction box (6) is fixedly installed on one side outer wall of the panel (2), the flow channel plate (3), and the A plate (4). A solenoid valve (7) is fixedly installed on the same side outer wall of the panel (2), the flow channel plate (3), and the A plate (4) next to the junction box (6). A heat insulation plate (5) is fixedly installed on the top of the panel (2), and four circular holes arranged in a circumferential array are provided on the heat insulation plate (5); A glue inlet mechanism is fixedly provided inside the panel (2), the flow channel plate (3) and the A plate (4). The glue inlet mechanism includes a hot runner assembly and a manifold assembly. The manifold assembly is provided on the hot runner.

2. A practical device for a three-point glue injection needle valve hot runner based on single-cylinder drive according to claim 1, characterized in that: The interior of plate A (4) is fixedly fitted with four mold cores (9) in a rectangular shape; The hot runner assembly includes a hot nozzle copper sleeve (10) and a valve pin (20). The valve pin (20) is inserted into the mold core (9), and the distance between the four valve pins (20) is ≤8.5mm. The hot nozzle copper sleeve (10) is fixedly installed inside the mold core (9) corresponding to the outer periphery of the valve pin (20).

3. A practical device for a three-point glue injection needle valve hot runner based on a single-cylinder drive according to claim 2, characterized in that: The hot runner assembly also includes a piston (13) and a valve needle block (14). The valve needle block (14) is fixedly installed on the top surface of the valve needle (20), and the piston (13) is sleeved on the lower part of the valve needle block (14) corresponding to the periphery of the valve needle (20).

4. A practical device for a three-point glue injection needle valve hot runner based on single-cylinder drive according to claim 3, characterized in that: The top surface of the valve needle pressure block (14) is fixedly fitted with a cylinder head (15), and the cylinder head (15) corresponds to the four round holes opened on the heat insulation plate (5).

5. A practical device for a three-point glue injection needle valve hot runner based on single-cylinder drive according to claim 1, characterized in that: The manifold assembly includes a manifold (16), a manifold screw (17), and a manifold anti-rotation shaft (21). The manifold (16) is fixedly installed inside the flow channel plate (3) corresponding to the periphery of the four hot flow channel assemblies. The manifold (16) has a connection hole. The manifold screw (17) passes through the connection hole on the manifold (16) to fix the manifold (16) and the flow channel plate (3). In order to prevent the manifold (16) from rotating, a manifold anti-rotation shaft (21) is also fixedly installed on it.

6. A practical device for a three-point glue injection needle valve hot runner based on single-cylinder drive according to claim 5, characterized in that: The manifold assembly further includes a manifold heating wire (12), a manifold center pin (18), and a manifold center pin pad (19). The manifold heating wire (12) is symmetrically fixedly installed on the upper and lower surfaces of the manifold (16). The manifold center pin pad (19) is fixedly installed in the middle of the four hot runner assemblies on the bottom surface of the manifold (16). The manifold center pin (18) is fixedly installed on the bottom surface of the manifold center pin pad (19), and the manifold center pin (18) fixes the manifold assembly and the panel (2) together.

7. A practical device for a three-point glue injection needle valve hot runner based on single-cylinder drive according to claim 3, characterized in that: A valve sleeve (22) is also fixedly installed on the valve needle (20), and a valve sleeve pressure block (11) is fixedly installed on the upper surface of the diverter plate (16) corresponding to the periphery of the valve needle (20).

8. A practical device for a three-point glue injection needle valve hot runner based on single-cylinder drive according to claim 5, characterized in that: The upper surface of the diversion plate (16) is fixedly installed with a fixed shaft in the middle of the four hot runner components. The top surface of the fixed shaft is fixedly installed with a positioning ring (1). The bottom surface of the positioning ring (1) is engaged with the outer arc of the four round holes opened on the heat insulation plate (5).

9. A practical device for a three-point glue injection needle valve hot runner based on single-cylinder drive according to claim 1, characterized in that: A nameplate (8) is fixedly installed inside the flow channel plate (3) next to the glue injection mechanism.

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