Hot nozzle assembly and hot runner

Abstract

The utility model belongs to the technical field of hot nozzles and hot runners, and particularly relates to a hot nozzle assembly which comprises a hot nozzle, a nozzle tip and a valve needle assembly, the hot nozzle comprises a hot nozzle body and a hot nozzle head, the nozzle tip is arranged on the hot nozzle head, the valve needle assembly comprises a valve rod, a valve needle and a force storage component matched with the valve rod and the valve needle, and the valve needle is connected with the valve rod in a matched mode. The hot nozzle body is provided with a positioning block, a positioning groove for guiding and positioning the valve rod and the power storage component is formed in the positioning block, and a positioning hole for the valve needle to extend in and out is formed in the middle of the positioning block; the hot nozzle, the nozzle tip and the valve needle assembly are arranged, accurate guidance is provided for movement of the valve needle, the valve needle moves up and down in the axis direction, and stability and accuracy of movement of the valve needle are guaranteed; the force storage part provides auxiliary force for movement of the valve needle, movement of the valve needle is buffered to a certain degree, and impact and abrasion between the valve needle and other parts are reduced; the utility model further discloses a hot runner matched with the high-temperature hot nozzle assembly, and the overall performance of the mold can be effectively improved.

Description

Technical Field

[0001] This utility model relates to the field of injection molding hot nozzle assembly and hot runner technology, specifically a hot nozzle assembly and a hot runner. Background Technology

[0002] Hot nozzle assembly injection molding is a core process in plastic product manufacturing. Its efficiency and quality directly affect production costs and product competitiveness. It requires heating before injection into the mold cavity to control the molten plastic before injection into the cavity, thereby achieving continuous and stable injection molding.

[0003] Existing hot runner structures have shortcomings in valve needle guidance and cushioning performance. During the opening and closing process, the valve needle is prone to deviation due to the lack of precise guidance, leading to molten material injection position errors and affecting the molding accuracy of the product. Simultaneously, the severe impact between the high-speed moving valve needle and the hot runner components not only reduces the valve needle's lifespan but may also cause production accidents such as molten material leakage. Therefore, there is an urgent need to develop a high-temperature hot runner structure that can provide precise guidance, stabilize valve needle movement, and effectively cushion component impacts. Optimizing the design of the hot runner, nozzle tip, and valve needle components to improve the reliability and stability of the hot runner system has become a key technological breakthrough for driving the injection molding industry towards intelligent and green transformation. Utility Model Content

[0004] To solve the above-mentioned technical problems, according to one aspect of the present invention, the present invention provides the following technical solution:

[0005] A hot nozzle assembly includes a hot nozzle, a nozzle tip, and a valve needle assembly. The hot nozzle includes a hot nozzle body and a hot nozzle head, with the nozzle tip disposed on the hot nozzle head. The valve needle assembly includes a valve stem, a valve needle at least partially disposed within the valve stem, and a power storage component that cooperates with the valve stem and the valve needle. The valve needle and the valve stem are connected in a cooperative manner. The hot nozzle body is provided with a positioning block, and the positioning block has a positioning groove for guiding and positioning the valve stem and the power storage component. The positioning block has a positioning hole in the middle for the valve needle to extend into and out.

[0006] The valve stem has a mounting cavity for installing the valve needle, and the mounting cavity has a limiting cavity for restricting the valve needle.

[0007] The valve needle has a protrusion on its upper edge that fits into the limiting cavity, and the protrusion has an upper bevel that is narrower at the top and wider at the bottom.

[0008] The bottom of the limiting cavity is provided with a limiting edge, and the protrusion has a lower inclined edge that is wider at the top and narrower at the bottom. The limiting edge engages with the lower inclined edge.

[0009] The valve needle has a protrusion on its upper edge that fits into the limiting cavity. The protrusion has a first oblique side that is narrower at the top and wider at the bottom, and a second oblique side that is wider at the top and narrower at the bottom.

[0010] An O-ring is provided inside the tip of the nozzle near the positioning hole.

[0011] The valve stem is driven by a cylinder to open and close the glue inlet channel.

[0012] A hot runner is provided, wherein the hot runner portion is located on a hot nozzle assembly as described in the above technical solution, the hot runner including a glue inlet hole and a first channel on the hot nozzle body, and a second channel inside the nozzle tip, wherein the glue inlet hole, the first channel and the second channel are interconnected.

[0013] Compared with existing technologies:

[0014] A hot nozzle assembly mainly comprises a hot nozzle, a nozzle tip, and a valve needle assembly. The hot nozzle includes a hot nozzle body and a hot nozzle head, with the nozzle tip disposed on the hot nozzle head. The valve needle assembly includes a valve stem, a valve needle, and a force-accumulating component that cooperates with the valve stem and valve needle. This force-accumulating component provides precise guidance for the movement of the valve needle, allowing it to move up and down along its axial direction, ensuring the stability and accuracy of the valve needle's movement. Furthermore, the force-accumulating component provides auxiliary force for the movement of the valve needle, buffering the movement of the valve needle to a certain extent and reducing impact and wear between the valve needle and other components.

[0015] This utility model also discloses a hot runner system that works in conjunction with a high-temperature hot nozzle, which can effectively improve the overall performance of the mold. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0017] Figure 2 for Figure 1 A schematic diagram of the internal structure of one specific implementation method;

[0018] Figure 3 for Figure 1 A schematic diagram of the internal structure of one specific implementation method;

[0019] Figure 4 for Figure 2 A magnified structural diagram of A in the middle;

[0020] Figure 5 for Figure 2 A magnified structural diagram of B in the diagram. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of this utility model clearer, the embodiments of this utility model will be described in further detail below with reference to the accompanying drawings.

[0022] This utility model provides a hot nozzle assembly; please refer to [link / reference]. Figures 1-5The device includes a hot nozzle 1, a nozzle tip 2, and a valve needle assembly 3. Its overall structure resembles a syringe. The hot nozzle 1 includes a hot nozzle body 11 and a hot nozzle head 12. The nozzle tip 2 is located on the hot nozzle head 12. Hot melt adhesive needs to be introduced through the nozzle tip 2 and poured into the mold cavity. The hot melt adhesive does not need to be stopped during injection, so the connection between the hot nozzle 1 and the nozzle tip 2 needs to be stable and reliable. The valve needle assembly 3 includes a valve stem 31, a valve needle 32 at least partially disposed within the valve stem 31, and a power storage component 33 that cooperates with the valve stem 31 and the valve needle 32. The hot nozzle body 11 provides precise guidance for the movement of the valve stem 31, ensuring that the valve needle 32 within the valve stem 31 can move up and down along a predetermined axial direction, ensuring the stability and accuracy of the movement of the valve needle 32, and preventing the valve needle 32 from deviating, shaking, or tilting during movement, always keeping it concentric with the nozzle tip 2.

[0023] According to a specific embodiment of a hot nozzle assembly, a positioning block 111 is provided in the hot nozzle body 11. The positioning block 111 is provided with a positioning groove 1111 for guiding and positioning the valve stem 31 and the power storage component 33. The positioning block 111 is provided with a positioning hole 1112 in the middle for the valve needle 32 to extend into.

[0024] In a further specific embodiment, the positioning groove 1111 is a cylindrical cavity to guide the columnar valve stem 31 and the power storage component 33, and the valve needle 32 and the valve stem 31 are on the same axis.

[0025] The power storage component 33 provides auxiliary force for the movement of the valve needle 32, mainly through the power source of the valve stem 31. In this embodiment, the cylinder 4 drives the opening and closing of the glue inlet channel, and the cylinder 4 controls the opening and closing time through the control system.

[0026] When the valve needle 32 moves downward to close, the energy storage component 33 is compressed and stores energy. When it is necessary to open the gate, the energy storage component 33 releases energy, pushing the valve needle 32 upward to help it open the gate quickly and improve its response speed. At the same time, the energy storage component 33 can also buffer the movement of the valve needle 32 to a certain extent, reducing the impact and wear between the valve needle 32 and other components.

[0027] The energy storage component 33 is usually an elastic element such as a spring. The energy storage component is one or more of a spring, a disc spring, and an elastic body. In this case, the energy storage component 33 is a spring.

[0028] The power storage component 33 is limited and engaged by at least one or more of its shoulder, stop boss, barb, slot, and inner hole. In this embodiment, the slot is 34. The spring 33 is inserted into the slot 34, and the upper end of the spring can be fixed by the same structure or by a pin, etc., which are not shown in the figure here.

[0029] The connection method between the valve stem 31 and the valve needle 32, in some specific embodiments, refers to... Figure 2 , 4 The valve stem 31 is provided with a mounting cavity 311 for mounting the valve needle 32, and the mounting cavity 311 is provided with a limiting cavity 3111 for limiting the valve needle 32.

[0030] In a further embodiment, the upper edge of the valve needle 32 is provided with a protrusion 321 that fits the limiting cavity 3111. The protrusion 321 has an upper inclined side 3211 that is narrower at the top and wider at the bottom. The main idea is a concave-convex fit. For ease of installation, the cross-sectional edge of the protrusion 321 is an upper inclined side 3211 that is narrower at the top and wider at the bottom.

[0031] In a further embodiment, the bottom of the limiting cavity 3111 is provided with a limiting edge 3112, so that the limiting edge 3112 is engaged with the limiting cavity 3111. The protrusion 321 has a lower inclined edge 3212 that is wider at the top and narrower at the bottom. The limiting edge 3112 engages with the lower inclined edge 3212, thereby providing reliable connection stability between the valve stem 31 and the valve needle 32.

[0032] In some embodiments, the upper edge of the valve needle 32 has the protrusion 321 of the previous embodiment, while the outer edge line changes, see reference. Figure 3 and 5 Specifically, the protrusion 321 has a first oblique side 3213 that is narrower at the top and wider at the bottom and a second oblique side 3214 that is wider at the top and narrower at the bottom. The second oblique side 3214 that is wider at the top and narrower at the bottom in this specific embodiment makes it more convenient for the valve stem 31 and the valve needle 32 to be inspected and replaced.

[0033] Of course, there are other ways to connect the valve stem 31 and the valve needle 32, such as threaded connection, pin / rivet connection, and ferrule / clip connection. The above methods can provide better connection reliability and stability.

[0034] To address the issue of sealing, an O-ring 21 is provided inside the tip 2 near the positioning hole 1112.

[0035] In the above-described embodiment, the hot nozzle assembly, the hot nozzle 1, the nozzle tip 2, and the valve needle assembly 3 cooperate with each other to provide precise guidance for the movement of the valve needle 32, ensuring that the valve needle 32 can move up and down along a predetermined axial direction, guaranteeing the stability and accuracy of the movement of the valve needle 32, preventing the valve needle 32 from deviating, shaking, or tilting during the movement, and always keeping it concentric with the dispensing nozzle, thereby preventing the valve needle 32 from colliding with the nozzle tip 2 when inserted into the dispensing port.

[0036] Furthermore, the energy storage component 33 provides auxiliary force for the movement of the valve needle 32. When the valve needle 32 moves downward to close, the energy storage component 33 is compressed and stores energy; when it is necessary to open the gate, the energy storage component releases energy, pushing the valve needle 32 upward, helping the valve needle 32 to quickly open the gate and improving the response speed of the valve needle 32. At the same time, the energy storage component 33 can also buffer the movement of the valve needle 32 to a certain extent, reducing the impact and wear between the valve needle 32 and other components.

[0037] This utility model also discloses a hot runner, referenced Figure 2 , 3 The hot runner portion is located on the hot nozzle assembly described in any of the above embodiments. The hot runner includes a glue inlet hole 111 and a first channel 112 on the hot nozzle body 11, and a second channel 22 inside the nozzle tip 2. The glue inlet hole 111, the first channel 112 and the second channel 22 are interconnected, providing a side-feeding embodiment. It is equipped with a power source such as a cylinder 4 to provide energy to drive the opening and closing of the glue inlet channel. The cylinder 4 controls the opening and closing time through a control system. This method has a fast response speed, high precision and easy control, and can effectively improve the overall performance of the mold and the hot runner.

[0038] Although the present invention has been described above with reference to embodiments, various modifications can be made and components can be replaced with equivalents without departing from the scope of the present invention. In particular, as long as there is no structural conflict, the features in the embodiments disclosed in this invention can be combined with each other in any way. The lack of an exhaustive description of these combinations in this specification is merely for the sake of brevity and resource conservation. Therefore, the present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A hot nozzle assembly, characterized in that, The device includes a hot nozzle, a nozzle tip, and a valve needle assembly. The hot nozzle includes a hot nozzle body and a hot nozzle head, with the nozzle tip disposed on the hot nozzle head. The valve needle assembly includes a valve stem, a valve needle at least partially disposed within the valve stem, and a power storage component that cooperates with the valve stem and the valve needle. The valve needle and the valve stem are connected in cooperation. The hot nozzle body is provided with a positioning block, and the positioning block has a positioning groove for guiding and positioning the valve stem and the power storage component. The positioning block has a positioning hole in the middle for the valve needle to extend into and out.

2. A hot nozzle assembly according to claim 1, characterized in that, The valve stem has a mounting cavity for installing the valve needle, and the mounting cavity has a limiting cavity for restricting the valve needle.

3. A hot nozzle assembly according to claim 2, characterized in that, The valve needle has a protrusion on its upper edge that fits into the limiting cavity, and the protrusion has an upper bevel that is narrower at the top and wider at the bottom.

4. A hot nozzle assembly according to claim 3, characterized in that, The bottom of the limiting cavity is provided with a limiting edge, and the protrusion has a lower inclined edge that is wider at the top and narrower at the bottom. The limiting edge engages with the lower inclined edge.

5. A hot nozzle assembly according to claim 4, characterized in that, The valve needle has a protrusion on its upper edge that fits into the limiting cavity. The protrusion has a first oblique side that is narrower at the top and wider at the bottom, and a second oblique side that is wider at the top and narrower at the bottom.

6. A hot nozzle assembly according to claim 1, characterized in that, An O-ring is provided inside the tip of the nozzle near the positioning hole.

7. A hot nozzle assembly according to claim 1, characterized in that, The valve stem is driven by a cylinder to open and close the glue inlet channel.

8. A hot runner, characterized in that, The hot runner portion is located on the hot nozzle assembly according to any one of claims 1-7. The hot runner includes a glue inlet hole and a first channel on the hot nozzle body, and a second channel inside the nozzle tip. The glue inlet hole, the first channel and the second channel are interconnected.

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