Novel hot runner needle valve sprue structure
By designing a new hot runner needle valve gate structure, including gate body, sealing sleeve and heating ring, the problems of high costs and uneven heating in the prior art are solved, and the heat balance and discharge stability during injection molding are achieved.
Patent Information
- Application Number
- CN202422011879.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-19
- Publication Date
- 2025-06-24
- Estimated Expiration
- 2034-08-19
AI Technical Summary
The existing hot runner needle valve gate structure is expensive due to the use of precious metals, and has complex structures and high processing and installation accuracy requirements, which can easily lead to heating and thermal conductivity imbalance, resulting in rapid local heat loss.
A new hot runner needle valve gate structure is designed, including a gate body and a removable sealing sleeve, the runner hole penetrates the gate body and the sealing sleeve, and a valve needle is installed internally to control the opening and closing of the runner hole. A heating ring is provided on the gate body and the outer periphery of the sealing sleeve, and a heat insulation sleeve is provided on the outer periphery of the sealing sleeve to improve heating efficiency.
Through this new structure, the heat balance between the gate body and the sealing sleeve is achieved, which avoids the problem of early condensation when the medium flows in the runner hole, and the accurate control of the valve needle is used to improve the discharge stability during the injection molding process.
Smart Images
Figure CN223013786U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of hot runner systems, in particular to a novel hot runner needle valve gate structure. Background Art
[0002] In the technical application of hot runners, the needle valve gate hot runner system is one of the commonly used hot runner systems. For the existing needle valve gate structure, in order to achieve an ideal use effect, high-performance precious metals are widely used, resulting in high costs. And due to the complex structure of the needle valve gate, high requirements for processing and installation accuracy, it is easy to cause unbalanced heating and heat conduction, and then local heat loss is fast. Summary of the Utility Model
[0003] The purpose of the utility model is to provide a novel hot runner needle valve gate structure that improves the heat balance between the gate body and the seal sleeve.
[0004] To solve the above technical problems, the utility model provides a novel hot runner needle valve gate structure, which includes a gate body, a seal sleeve detachably connected to one side of the gate body, a runner hole sequentially penetrating through the gate body and the seal sleeve, and a valve needle is movably installed inside the runner hole to control the opening and closing of the runner hole; heating coils are arranged on the outer peripheries of the gate body and the seal sleeve.
[0005] Further, a heat insulation sleeve is detachably sleeved on the outer periphery of the seal sleeve, so that the heat insulation sleeve wraps outside the heating coil.
[0006] Further, a limiting groove is circumferentially formed on the outer side of the seal sleeve, and a retaining ring is clamped in the limiting groove to limit the heat insulation sleeve.
[0007] Further, one end of the seal sleeve away from the gate body has a seal ring, the seal ring is matched with the mold sealing hole, and the mold sealing hole has a reduced opening structure.
[0008] Further, the seal ring and the mold sealing hole are in interference fit.
[0009] Further, one end of the runner hole close to the seal sleeve has a guiding inclined surface to guide the valve needle.
[0010] Further, the gate body and the seal sleeve are in threaded fit, and the connecting end surfaces of the gate body and the seal sleeve are in tight fit.
[0011] Further, the middle position of the outer periphery of the seal sleeve has a polygonal structure.
[0012] The beneficial effects of the present utility model are as follows: When using the gate structure of this solution, the sealant sleeve is connected to the gate body, so that the runner hole is formed between the gate body and the sealant sleeve to ensure that the medium can flow stably along the runner hole. At the same time, the outer peripheries of the gate body and the sealant sleeve are heated synchronously by the heating coil, so that the heating received by the gate body and the sealant sleeve is more uniform, ensuring that the heat at the runner hole is relatively unified, avoiding problems such as premature condensation when the medium flows in the runner hole, and accurately controlling the output of the medium through the valve needle, thereby improving the stability of the discharge during the injection molding process. BRIEF DESCRIPTION OF THE DRAWINGS
[0013] Figure 1 is a schematic structural diagram of the present utility model.
[0014] Reference numerals: 1, gate body; 2, heat insulation sleeve; 3, heating coil; 4, retaining ring; 5, sealant sleeve; 6, valve needle; 7, mold sealing hole; 8, runner hole; 9, limiting groove; 10, sealant ring; 11, guiding inclined surface. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0015] The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model belong to the scope of protection of the present utility model.
[0016] Those skilled in the art should understand that in the disclosure of the present utility model, the orientation or positional relationships indicated by the terms "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. are based on the orientation or positional relationships shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, 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. Therefore, the above terms should not be construed as limitations on the present utility model.
[0017] It can be understood that the term "one" should be understood as "at least one" or "one or more". That is, in one embodiment, the number of an element can be one, and in other embodiments, the number of the element can be multiple. The term "one" should not be construed as a limitation on the number.
[0018] Such as Figure 1As described above, the present utility model provides a novel hot runner needle valve gate structure, which includes a gate body 1 and a seal sleeve 5 detachably connected to one side of the gate body 1. A runner hole 8 sequentially penetrates through the gate body 1 and the seal sleeve 5, and a valve pin 6 is movably installed inside the runner hole 8 to control the opening and closing of the runner hole 8; heating coils 3 are arranged on the outer peripheries of both the gate body 1 and the seal sleeve 5.
[0019] When using the gate structure of this solution, the seal sleeve is connected to the gate body, so that a runner hole is formed between the gate body and the seal sleeve to ensure that the medium can flow stably along the runner hole. At the same time, the outer peripheries of the gate body and the seal sleeve are heated synchronously by the heating coils, so that the heating received by the gate body and the seal sleeve is more uniform, ensuring that the heat at the runner hole is relatively unified, avoiding problems such as premature condensation when the medium flows in the runner hole, and accurately controlling the output of the medium through the valve pin, thereby improving the stability of the discharge during the injection molding process.
[0020] Among them, the valve pin can be controlled to open and close through a timing controller or other means, thereby controlling the opening and closing state at the runner hole.
[0021] In an embodiment of this solution, the heating coil adopts a heating method such as an electric heating wire or induction heating.
[0022] Preferably, a heat insulation sleeve 2 is detachably sleeved on the outer periphery of the seal sleeve 5, so that the heat insulation sleeve 2 wraps the outside of the heating coil 3.
[0023] Specifically, the heat insulation sleeve insulates and keeps warm the position of the heating coil, so that the heat generated by the heating coil is not easily dissipated outward, thereby improving the heating effect of the heating coil on the gate body and the seal sleeve.
[0024] Preferably, a limiting groove 9 is circumferentially formed on the outer side of the seal sleeve 5, and a retaining ring 4 is clamped in the limiting groove 9 to limit the heat insulation sleeve 2 by the retaining ring 4.
[0025] Specifically, the retaining ring is clamped and limited by the limiting groove, and then the heat insulation sleeve is limited by the retaining ring to ensure the stable setting of the heat insulation sleeve, thereby ensuring the heat preservation effect of the heat insulation sleeve on the heating coil. At the same time, after the retaining ring is disassembled and separated from the limiting groove, the heating coil can be conveniently replaced to ensure the long-term stable use of the gate structure.
[0026] Among them, the retaining ring can be made of an elastic material, such as rubber, etc., to ensure that the retaining ring can be stretched and installed at the limiting groove.
[0027] Preferably, one end of the seal sleeve 5 away from the gate body 1 has a seal ring 10, and the seal ring 10 is matched with the mold sealing hole 7, and the mold sealing hole 7 has a reduced opening structure.
[0028] Specifically, by matching and installing the sealing rubber ring with the mold sealing hole, the connection between the sealing rubber sleeve and the mold sealing hole becomes tighter, ensuring that the medium flows stably through the mold sealing hole from the runner hole.
[0029] At the same time, due to the constriction structure of the mold sealing hole, the matching position of the mold sealing hole and the sealing rubber ring uses a relatively small diameter size, thereby reducing the contact area and heat conduction heat dissipation, so that the gate body and the sealing rubber sleeve can maintain stability more stably.
[0030] Preferably, the sealing rubber ring 10 and the mold sealing hole 7 are in interference fit, so that the connection between the sealing rubber ring and the mold sealing hole is tighter, avoiding the situation of external leakage when the medium in the runner hole is transmitted to the mold sealing hole.
[0031] Preferably, one end of the runner hole 8 close to the sealing rubber sleeve 5 has a guiding inclined surface 11 to guide the valve needle 6 with the guiding inclined surface 11.
[0032] Specifically, when the valve needle moves relative to the runner hole, the end of the valve needle is guided by the guiding inclined surface, so that the valve needle can accurately move to the outlet end of the runner hole, and then the runner hole is blocked by the valve needle, improving the conveying control effect of the runner hole on the medium.
[0033] Preferably, the gate body 1 and the sealing rubber sleeve 5 are in threaded fit, and the connecting end surfaces of the gate body 1 and the sealing rubber sleeve 5 are in tight fit.
[0034] Specifically, through the threaded fit, the sealing rubber sleeve is stably connected to one side of the gate body, and the connecting end surfaces between the gate body and the sealing rubber sleeve are made tight enough by thread pressing, ensuring that while the sealing rubber sleeve can be conveniently replaced, the problem of material leakage at the connection between the gate body and the sealing rubber sleeve is avoided.
[0035] Preferably, the middle position of the outer periphery of the sealing rubber sleeve 5 has a polygonal structure.
[0036] Specifically, due to the polygonal structure of the outer periphery of the sealing rubber sleeve, when the sealing rubber sleeve and the gate body are thread-pressed, tools such as a wrench can be used to assist in the installation and disassembly of the sealing rubber sleeve.
[0037] The present utility model is not limited to the above best implementation mode. Anyone can obtain other various forms of products under the inspiration of the present utility model. However, no matter what changes are made in its shape or structure, as long as it has the same or similar technical solutions as the present application, it falls within the protection scope of the present utility model.
Claims
1. A new type of hot runner needle valve gate structure, characterized by: The invention comprises a gate body (1), a sealing sleeve (5) detachably connected to one side of the gate body (1), a flow channel hole (8) passing through the gate body (1) and the sealing sleeve (5) in sequence, and a valve needle (6) is movably installed inside the flow channel hole (8) so that the valve needle (6) controls the opening and closing of the flow channel hole (8); a heating ring (3) is arranged on the periphery of the gate body (1) and the sealing sleeve (5).
2. The novel hot runner needle valve gate structure according to claim 1 is characterized in that: A detachable sleeve on the outer periphery of the sealing rubber sleeve (5) is provided with a heat insulating sleeve (2), so that the heat insulating sleeve (2) is wrapped around the outer side of the heating coil (3).
3. The novel hot runner needle valve gate structure according to claim 2 is characterized in that: A limiting groove (9) is provided on the outer side of the sealing rubber sleeve (5) along the circumferential direction, and the retaining ring (4) is clamped in the limiting groove (9) so that the retaining ring (4) limits the heat insulation sleeve (2).
4. The novel hot runner needle valve gate structure according to claim 1 is characterized in that: The end of the sealing sleeve (5) away from the gate body (1) is provided with a sealing ring (10), the sealing ring (10) matches the mold sealing hole (7), and the mold sealing hole (7) has a shrinking structure.
5. The novel hot runner needle valve gate structure according to claim 4 is characterized in that: The sealing ring (10) is in interference fit with the sealing hole (7) of the mold.
6. The novel hot runner needle valve gate structure according to claim 1 is characterized in that: One end of the flow channel hole (8) close to the sealing rubber sleeve (5) is provided with a guide inclined surface (11), so that the guide inclined surface (11) can guide the valve needle (6).
7. The novel hot runner needle valve gate structure according to claim 1 is characterized in that: The gate body (1) and the sealing sleeve (5) are threadedly matched, and the connecting end surfaces of the gate body (1) and the sealing sleeve (5) are tightly matched.
8. The novel hot runner needle valve gate structure according to claim 1 is characterized in that: The middle part of the outer circumference of the sealing rubber sleeve (5) has a polygonal structure.