Hot runner system-nozzle tip heating structure

Abstract

The utility model discloses a hot runner system-nozzle tip heating structure which comprises a body, the body comprises an upper runner device, a sprue bush and a nozzle tip, the nozzle tip is sleeved in the sprue bush, the sprue bush is fixed at the bottom of the upper runner device through threads, and the top of the nozzle tip is in butt joint with the inner bottom end of the upper runner device. According to the scheme, the heating rod is arranged in the hot runner nozzle tip or the heater is embedded outside the hot runner nozzle tip to improve the temperature of the pouring gate, the nozzle tip is fixed through the pouring gate, so that the fixing stability is ensured, the temperature of the pouring gate position is controlled by arranging the heater on the nozzle tip or installing the heating rod inside the nozzle tip, and the stable glue discharging of the pouring gate is ensured.

Description

Technical Field

[0001] This utility model relates to the field of hot runner nozzle technology, specifically a hot runner system - nozzle heating structure. Background Technology

[0002] Hot runner systems are heating systems used in injection molds to inject molten plastic particles into the mold cavity. Hot runner molds are a novel structure that heats the runners and sprues of traditional or three-plate molds, eliminating the need to remove them during each molding cycle. Hot runners maintain the plastic in the runners and gates in a molten state through heating. A hot runner system typically consists of hot nozzles, manifolds, a temperature control box, and accessories. Hot nozzles generally come in two types: open hot nozzles and needle valve hot nozzles. Since the type of hot nozzle directly determines the selection of the hot runner system and the mold manufacturing process, hot runner systems are often correspondingly divided into open hot runner systems and needle valve hot runner systems.

[0003] Existing hot runner nozzles have the following defects:

[0004] Existing technologies use beryllium copper or other thermally conductive materials for nozzle tip heating, which relies on the thermal conductivity of the nozzle tip material to control the temperature at the nozzle tip position. This results in unstable temperature at the gate position, which can easily lead to inconsistent glue dispensing at the gate position and instability in product quality due to the inability to achieve precise temperature control.

[0005] Therefore, a solution is needed. Utility Model Content

[0006] (a) Technical problems to be solved

[0007] To address the shortcomings of existing technologies, this invention provides a structure that improves the gate temperature by incorporating a heating rod in the hot runner nozzle tip or embedding a heater on the outside of the nozzle tip, and the nozzle tip can be independently temperature-controlled, thus solving the problems mentioned in the background art.

[0008] (II) Technical Solution

[0009] To achieve the above objectives, this utility model employs the following technical solution: a structure for increasing the gate temperature by incorporating a heating rod within the hot runner nozzle tip or embedding a heater externally, comprising a body, a gate sprue, and a nozzle tip. The nozzle tip is installed within the gate sprue, which is threaded to the bottom of the body, and the nozzle tip is fixed between the gate sprue and the body. The body contains a flow channel with a funnel-shaped structure at the opening, which connects to a manifold plate. The bottom of the body has a threaded structure and a positioning step, and a heater outlet hole. The nozzle tip is installed at the bottom of the positioning step, with its bottom diameter matching the positioning step of the body. A heating rod is either incorporated within the nozzle tip or a heater is embedded externally. The heating rod or embedded heater outlet channel exits through the outlet hole at the bottom of the body. The nozzle tip is made of hard alloy material and its surface is nitrided to improve wear resistance and corrosion resistance. An elliptical flow channel is provided at the nozzle tip step position, connecting with the flow channel of the body. It is locked to the body by the gate sprue, and a copper sleeve heater is provided on the outside of the body.

[0010] The mouthpiece includes a mouthpiece base, a mouthpiece tip, a heating rod, and a connecting wire. The mouthpiece base and the mouthpiece tip are smoothly transitioned and integrally formed. The mouthpiece base is located at the top of the mouthpiece tip. The heating rod is installed inside the mouthpiece base or is embedded externally. The heating rod is located at the center inside the mouthpiece tip or is wrapped and embedded outside the mouthpiece tip. The mouthpiece tip has a cylindrical structure and a conical bottom. The connecting wire is installed at one end of the heating rod.

[0011] (III) Beneficial Effects

[0012] This invention provides a hot runner system - nozzle tip heating structure. It has the following beneficial effects:

[0013] In this design, the hot runner nozzle tip has a built-in heating rod or an externally embedded heater to increase the gate temperature. The nozzle tip is fixed by a gate screw to ensure stability. The temperature at the gate location is controlled by a heater on the nozzle tip or an internal heating rod, ensuring stable glue dispensing and balanced temperature control. The nozzle tip is installed between the body and the gate screw via a threaded fixing method, which is convenient for installation and disassembly, thereby reducing the maintenance burden on workers and improving their work efficiency.

[0014] This solution features a hot runner nozzle tip with a built-in heating rod or an externally embedded heater to increase the gate temperature. This improves temperature uniformity in the gate area by integrating the heating rod inside the nozzle tip or embedding a heater externally. This structure is suitable for precision injection molding and can effectively improve product quality and production efficiency. The heating rod is arranged along the axis inside the nozzle tip and connected to a temperature control system. Precise control of the gate temperature is achieved by adjusting the heating power. This hot runner system with a nozzle tip heating structure is simple, has low maintenance costs, and is very convenient to use. Attached Figure Description

[0015] Fig. 1 This is a schematic diagram of the overall structure of this utility model;

[0016] Fig. 2 This is a schematic diagram of the tip of the nozzle and its internal structure.

[0017] Fig. 3 This is a schematic diagram of the structure of the tip of the present invention.

[0018] In the diagram, 1. Main body; 2. Upper runner device; 3. Sprue; 4. Nozzle tip; 5. Nozzle tip seat; 6. Nozzle tip; 8. Heating rod; 9. Connecting wire; 10. Runner head; 11. Runner tube; 12. Runner hopper; 13. Conveying runner; 14. Copper jacket heater. Detailed Implementation

[0019] 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.

[0020] Please see Figs. 1-3 This utility model provides a technical solution:

[0021] Example

[0022] Regarding the aforementioned problems: existing technologies use beryllium copper or other thermally conductive materials for nozzle tip heating, relying on the thermal conductivity of the nozzle tip material to control the temperature at the nozzle tip position. This results in unstable temperature at the gate position, easily causing unstable glue dispensing at the gate position; and the inability to achieve precise temperature control leads to unstable product quality and other problems.

[0023] The solution is as follows: A hot runner system - nozzle tip heating structure, which improves the gate temperature by means of a built-in heating rod or an externally embedded heater at the nozzle tip. It includes a body 1, a gate sprue 3, and a nozzle tip 4. The nozzle tip 4 is installed inside the gate sprue 3, which is threaded to the bottom of the body 1, and the nozzle tip 4 is fixed between the gate sprue 3 and the body 1. The body 1 has a flow channel inside, and a funnel-shaped structure at the opening that connects to the manifold. The bottom of the body 1 is designed with a threaded structure and a positioning step, and is equipped with... It has a heater outlet hole; a nozzle 4 is installed at the bottom of the positioning step, the bottom diameter of the nozzle 4 matches the positioning step of the body, and a heating rod is set inside the nozzle 4 or a heater is embedded outside the nozzle; the heating rod or embedded heater outlet groove exits through the outlet hole at the bottom of the body; the nozzle 4 is made of hard alloy material and the surface is nitrided to improve wear resistance and corrosion resistance; an elliptical flow channel is set at the step position of the nozzle 4 to connect with the flow channel of the body; and it is locked to the body 1 by the gate screw 3; a copper sleeve heater is set on the outside of the body;

[0024] The nozzle tip 4 includes a nozzle tip seat 5, a nozzle tip 6, a heating rod 8, and a connecting wire 9. The nozzle tip seat 5 and the nozzle tip 6 are smoothly transitioned and integrally formed. The nozzle tip seat 5 is located at the top of the nozzle tip 6. The heating rod 8 is installed inside the nozzle tip seat 5 or is embedded externally. The heating rod 8 is located at the center inside the nozzle tip 6 or is wrapped and embedded outside the nozzle tip. The nozzle tip 6 has a cylindrical structure and a conical bottom. The connecting wire 9 is installed at one end of the heating rod 8 to provide power to the heating rod 8, so that the heating rod 8 can heat the material. The upper flow channel device 2 includes a flow channel head 10 and a flow channel tube 11. The flow channel head 10 has a cylindrical structure and a concave bottom structure. The flow channel tube 11 and the flow channel head 10 are smoothly transitioned and integrally formed. The flow channel head 10 is located at the top of the flow channel tube 11. A flow channel hopper 12 is opened at the top of the flow channel head 10. The flow channel hopper 12 has a funnel-shaped structure. A conveying flow channel 13 is opened inside the flow channel tube 11. The flow channel hopper 12 and the conveying flow channel 13 are connected.

[0025] Working principle: During operation, when fixing the nozzle tip 4, the nozzle tip 4 is sleeved inside the gate sprue 3, so that the insertion channel 19 of the locking threaded post 15 is embedded in the gate sprue 3 to limit the nozzle tip 4. Then, the locking threaded post 15 is threaded to the bottom of the flow channel device 2 to achieve the purpose of fixing. In use, the material can flow from the funnel-shaped flow channel 12 into the conveying flow channel 13, and then the material can flow into the nozzle tip 4 through the conveying flow channel 13. When the material flows into the nozzle tip seat 5 of the nozzle tip 4, the material in the nozzle tip seat 5 flows into the nozzle tip 6. Then, the connecting wire 9 powers the heating rod 8, and the heating rod 9 heats up, so the material in the nozzle tip 6 can be heated. The material flows over the outside of the heating rod 9, which can also achieve the purpose of heating. Finally, the heated material flows out through the bottom of the nozzle tip 6. In use, the copper sleeve heater 14 can effectively achieve the purpose of heating.

[0026] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. It will be apparent to those skilled in the art that this utility model is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or basic characteristics of this utility model. Therefore, the embodiments should be considered exemplary and non-limiting in all respects. The scope of this utility model is defined by the appended claims rather than the foregoing description, and thus all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this utility model. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0027] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A hot runner system - nozzle tip heating structure, characterized in that: Includes a body (1), which includes an upper runner device (2), a gate (3), and a nozzle (4). The nozzle (4) is fitted inside the gate (3). The gate (3) is fixed to the bottom of the upper runner device (2) by threads, and the top of the nozzle (4) is connected to the bottom of the upper runner device (2).

2. The hot runner system-nozzle heating structure according to claim 1, characterized in that: The nozzle (4) includes a nozzle seat (5), a nozzle tip (6), a heating rod (8), and a connecting wire (9). The nozzle seat (5) and the nozzle tip (6) are smoothly transitioned and integrally formed. The nozzle seat (5) is located at the top of the nozzle tip (6). The nozzle tip (4) is provided with a heating rod (8) inside or a heater is embedded outside the nozzle tip (4). The heating rod (8) is located at the center inside the nozzle tip (6) or is wrapped and embedded outside the nozzle tip (4). The nozzle tip (6) has a cylindrical structure and a conical structure at the bottom. The connecting wire (9) is installed at one end of the heating rod (8).

3. The hot runner system-nozzle heating structure according to claim 1, characterized in that: The upper flow channel device (2) includes a flow channel head (10) and a flow channel tube (11). The flow channel head (10) has a cylindrical structure and a concave bottom structure. The flow channel tube (11) and the flow channel head (10) are smoothly transitioned and integrally formed. The flow channel head (10) is located at the top of the flow channel tube (11). A flow channel hopper (12) is provided at the top of the flow channel head (10). The flow channel hopper (12) has a funnel-shaped structure. A conveying flow channel (13) is provided inside the flow channel tube (11). The flow channel hopper (12) and the conveying flow channel (13) are connected.

4. The hot runner system-nozzle heating structure according to claim 3, characterized in that: A copper sleeve heater (14) is provided on the outside of the flow channel pipe (11), and the copper sleeve heater (14) has a cylindrical structure.

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