Hot nozzle of hot runner
By using dual heating parts and temperature sensors in the hot runner nozzle, the problem of unreliable temperature control is solved, the uniformity and accuracy of temperature in the runner can be achieved, and the production efficiency and equipment stability are improved.
Patent Information
- Application Number
- CN202422754577.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-12
- Publication Date
- 2025-09-05
- Estimated Expiration
- 2034-11-12
AI Technical Summary
The temperature control of existing hot runner hot nozzles is unreliable, resulting in unstable flow of plastic melt and high energy consumption.
The dual heating element design is adopted, with independent heating elements on the outside of the first runner and the second runner respectively, and a temperature sensor is equipped with real-time monitoring and controlling the temperature in the runner, combining a modular design and thermal insulation layer to improve temperature uniformity and control accuracy.
It realizes precise control of temperature in the runner, adapts to the melting needs of different materials, improves the quality and production efficiency of finished products, reduces energy consumption and extends the service life of the equipment.
Smart Images
Figure CN223302134U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of hot runners, in particular to a hot runner nozzle. Background Art
[0002] Hot runner systems are heating components used in injection molds to inject molten plastic particles into the mold cavity. A hot runner mold is a novel construction that heats the sprue and runners of a traditional or three-plate mold, eliminating the need to remove the runners and sprue during each molding process. Hot runners use heat to keep the plastic in the runners and sprue molten. Because heating rods and coils are located near or in the center of the runners, the entire runner from the injection molding machine nozzle outlet to the sprue is kept at a high temperature, keeping the plastic molten. After shutting down the machine, it is generally not necessary to open the runners to remove the solidified material; upon restarting, the runners only need to be heated to the desired temperature. Therefore, the hot runner process is sometimes referred to as a hot manifold system or runnerless molding.
[0003] Most existing hot nozzles use a single heating source, which can easily lead to local overheating or overcooling, resulting in unstable flow of the plastic melt. At the same time, due to heat loss, energy consumption is high, reducing production efficiency.
[0004] Therefore, there is an urgent need for a hot runner nozzle to solve the problem of unreliable temperature control of the fluid by the hot runner nozzle in the prior art. Utility Model Content
[0005] In view of this, the present invention proposes a hot runner nozzle, which aims to solve the problem of unreliable temperature control of the fluid by the hot runner nozzle in the prior art.
[0006] The utility model provides a hot runner nozzle, comprising:
[0007] a housing, wherein a first flow channel is provided at an upper portion of the housing, and a first heating element is provided outside the first flow channel;
[0008] an inner shell, disposed inside the outer shell, with a second flow channel disposed in the middle of the inner shell, the second flow channel connected to the bottom of the first flow channel, and a second heating element disposed on the outer side of the second flow channel;
[0009] The controller is arranged on the housing and is electrically connected to the first heating element and the second heating element respectively.
[0010] Furthermore, two second heating elements are provided, one second heating element is provided at one end of the second flow channel close to the first heating element, and the other second heating element is provided at one end of the second flow channel away from the first heating element.
[0011] Furthermore, the hot runner nozzle further includes a temperature sensor, which is electrically connected to the controller and includes:
[0012] a first sensor, disposed on an outer wall of the first flow channel, and configured to monitor a temperature of the fluid in the first flow channel;
[0013] The second sensor is arranged on the outer wall of the second flow channel, and is used to monitor the temperature of the fluid in the second flow channel.
[0014] Furthermore, two second sensors are provided, wherein one second sensor is provided at an end of the second flow channel close to the first heating element, and the other second sensor is provided at an end of the second flow channel away from the first heating element.
[0015] Furthermore, the housing further comprises:
[0016] A sealing gasket is disposed between the outer shell and the inner shell, and the sealing gasket is also located at the bottom of the first flow channel.
[0017] Furthermore, the housing further comprises:
[0018] The first heat insulating layer is arranged on the outer side of the first heating element.
[0019] Furthermore, the inner shell further comprises:
[0020] The second heat insulating layer is arranged on the outer side of the second heating element.
[0021] Furthermore, the inner shell includes a vertical portion and a necked portion, wherein the outer diameter of the upper portion of the vertical portion is smaller than the outer diameter of the lower portion, so that the inner shell abuts against the outer shell.
[0022] Furthermore, the outer shell is sleeved on the vertical portion.
[0023] Furthermore, the first heating element and the second heating element include:
[0024] Heating plate and heating wire.
[0025] Compared to existing technologies, the present invention offers the advantage of independent first and second heating elements outside the first and second channels of the hot runner nozzle, enabling more precise temperature control to accommodate the melting requirements of different materials. Electrically connected to a controller, the temperature of the heating elements can be adjusted in real time to ensure uniform temperature within the channels, adapting to the melting requirements of different materials and further improving the quality of the finished product. Furthermore, the modular design facilitates maintenance and cleaning, effectively extending the equipment's service life and production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS
[0026] Various other advantages and benefits will become apparent to those skilled in the art upon reading the detailed description of the preferred embodiment below. The accompanying drawings are for illustration purposes only and are not to be considered as limiting the present invention. The same reference symbols are used throughout the accompanying drawings to represent the same components. In the accompanying drawings:
[0027] Figure 1 A cross-sectional view of a hot runner nozzle provided in an embodiment of the present utility model;
[0028] Figure 2 A cross-sectional view of a housing provided in an embodiment of the present utility model;
[0029] Figure 3 A cross-sectional view of the inner shell provided in an embodiment of the present utility model.
[0030] In the figure: 100, outer shell; 110, first flow channel; 120, first heating element; 130, sealing gasket; 140, first thermal insulation layer; 200, inner shell; 210, second flow channel; 220, second heating element; 230, second thermal insulation layer; 240, vertical portion; 250, necking portion; 300, controller; 400, temperature sensor; 410, first sensor; 420, second sensor. DETAILED DESCRIPTION
[0031] The following embodiments are used to illustrate the present invention, but are not intended to limit the scope of the present invention.
[0032] In the description of this application, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application.
[0033] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature specified as "first" or "second" may explicitly or implicitly include one or more of such features. Throughout this application, unless otherwise specified, "plurality" means two or more.
[0034] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.
[0035] See Figure 1-3 As shown, this embodiment provides a hot runner nozzle, including an outer shell 100, a first flow channel 110 is provided on the upper part of the outer shell 100, and a first heating element 120 is provided on the outer side of the first flow channel 110; an inner shell 200 is provided inside the outer shell 100, a second flow channel 210 is provided in the middle part of the inner shell 200, the second flow channel 210 is connected to the bottom of the first flow channel 110, and a second heating element 220 is provided on the outer side of the second flow channel 210; a controller 300 is provided on the outer shell 100, and the controller 300 is electrically connected to the first heating element 120 and the second heating element 220 respectively.
[0036] It is understood that the first heating element 120 outside the first flow channel 110 and the second heating element 220 outside the second flow channel 210 of the hot runner nozzle of the present invention are independent of each other, enabling more precise temperature control to meet the melting requirements of different materials. Through the electrical connection of the controller 300, the temperature of the heating element can be adjusted in real time to ensure uniform temperature within the flow channel and adapt to the melting requirements of different materials, further improving the quality of the finished product. In addition, the modular design makes maintenance and cleaning more convenient, effectively extending the service life of the equipment and production efficiency.
[0037] In some embodiments of the present application, two second heating elements 220 are provided, one second heating element 220 is provided at one end of the second flow channel 210 close to the first heating element 120 , and the other second heating element 220 is provided at one end of the second flow channel 210 away from the first heating element 120 .
[0038] It is understandable that by providing two heating elements in the second flow channel 210, the hot runner nozzle achieves more flexible and uniform temperature control. The two heating elements are located at both ends of the second flow channel 210, so that the molten plastic can be heated more evenly during the flow process, avoiding local overheating or overcooling. This design not only improves the efficiency of plastic melting, but also can adapt to the temperature requirements of different plastic materials, ensuring that it achieves the optimal flow state during the production process. In addition, the additional heating elements enhance the overall heating capacity, reduce the decline in production efficiency due to insufficient heating, and provide greater protection for actual production.
[0039] In some embodiments of the present application, the hot runner nozzle also includes a temperature sensor 400, which is electrically connected to the controller 300. The temperature sensor 400 includes a first sensor 410, which is arranged on the outer wall of the first flow channel 110. The first sensor 410 is used to monitor the temperature of the fluid in the first flow channel 110; the second sensor 420 is arranged on the outer wall of the second flow channel 210. The sensor is used to monitor the temperature of the fluid in the second flow channel 210.
[0040] It is understandable that the introduction of the temperature sensor 400 design enables the hot runner nozzle to have real-time feedback capabilities in temperature monitoring. The first sensor 410 and the second sensor 420 are respectively arranged on the outer walls of the first flow channel 110 and the second flow channel 210, which can accurately monitor the temperature changes of the fluid to ensure that the heating state can be adjusted in time. This real-time monitoring can not only improve the yield of the product, but also reduce the material waste caused by improper temperature control during the production process. In addition, the addition of the temperature sensor 400 can also provide a basis for subsequent data analysis and optimization, so that the hot runner nozzle maintains good stability and reliability during long-term use.
[0041] In some embodiments of the present application, two second sensors 420 are provided, wherein one second sensor 420 is provided at one end of the second flow channel 210 close to the first heating element 120 , and the other second sensor 420 is provided at one end of the second flow channel 210 away from the first heating element 120 .
[0042] It is understood that the provision of two temperature sensors 400 in the second flow channel 210 further enhances the accuracy and effectiveness of temperature monitoring. Each sensor is located near and far from the first heating element 120, respectively, allowing for more comprehensive monitoring of temperature changes during the fluid flow process. This distributed monitoring approach enables the system to gain a deeper understanding of the heat distribution within the flow channel, thereby achieving more precise temperature regulation. This not only helps optimize the production process, but also improves the consistency of product quality during use, ensuring that each batch of finished products meets the expected standards and requirements.
[0043] In some embodiments of the present application, the outer shell 100 further includes a sealing gasket 130 disposed between the outer shell 100 and the inner shell 200 . The sealing gasket 130 is also located at the bottom of the first flow channel 110 .
[0044] It is understood that the placement of sealing gasket 130 between outer shell 100 and inner shell 200 enhances the sealing performance of the hot runner nozzle, preventing leakage of molten plastic during flow. The introduction of this sealing structure effectively avoids material waste and pollution during the production process, ensuring a clean and safe production environment. In addition, sealing gasket 130 can also provide a certain degree of thermal insulation, further improving the energy efficiency of the hot runner and reducing the impact of the external environment on temperature control. This design not only improves the stability of the equipment, but also provides a guarantee for long-term efficient operation and reduces the failure rate.
[0045] In some embodiments of the present application, the housing 100 further includes a first heat insulating layer 140 disposed on the outside of the first heating element 120 .
[0046] It is understood that the provision of the first thermal insulation layer 140 on the outside of the first heating element 120 can effectively reduce heat loss and improve heating efficiency. The addition of the thermal insulation layer allows the heat of the heating element to be better concentrated within the flow channel, reducing the impact of the external environment on the temperature. This not only reduces energy consumption but also improves production stability and ensures temperature consistency during each melting process. In addition, the thermal insulation layer can extend the service life of the heating element, reduce the risk of failure due to overheating, provide reliable protection for long-term operation, and thus improve overall production efficiency.
[0047] In some embodiments of the present application, the inner shell 200 further includes a second heat insulation layer 230 disposed on the outside of the second heating element 220 .
[0048] As can be understood, the second thermal insulation layer 230 effectively prevents heat loss during the flow process, ensuring that the molten plastic receives sufficient heat as it passes through the second runner 210. This significantly improves the energy efficiency of the entire hot runner, reduces energy consumption, and ensures the melt quality of the plastic. In high-temperature operating environments, the thermal insulation layer also protects the heating element and its surrounding components, reducing the impact of temperature fluctuations on the system, improving equipment reliability and stability, and providing a safer operating environment for production.
[0049] In some embodiments of the present application, the inner shell 200 includes a vertical portion 240 and a necked portion 250 , wherein the upper outer diameter of the vertical portion 240 is smaller than the lower outer diameter, so that the inner shell 200 abuts against the outer shell 100 .
[0050] It's understandable that the design of the vertical portion 240 and the necked portion 250 of the inner shell 200 makes the hot runner nozzle more compact and stable. The design of the upper outer diameter of the vertical portion 240 being smaller than the lower outer diameter not only improves the fit between the inner shell 200 and the outer shell 100, but also effectively prevents leakage of molten plastic, ensuring a safe production process. Furthermore, the design of the necked portion 250 helps guide the smooth flow of molten plastic, improving production efficiency and laying a solid foundation for the reliability and ease of operation of the hot runner nozzle in practical applications.
[0051] In some embodiments of the present application, the housing 100 is sleeved on the vertical portion 240 .
[0052] It is understood that the outer shell 100 is mounted on the vertical portion 240, enhancing the overall stability and structural strength of the hot runner nozzle, creating a good fit between the outer shell 100 and the inner shell 200, avoiding structural loosening caused by external impact or thermal expansion and contraction, and ensuring the stability of the equipment during long-term operation. In addition, good structural coordination can also reduce heat loss and improve energy efficiency. By optimizing the connection between the outer shell 100 and the inner shell 200, the sealing of the equipment is further enhanced, providing more reliable protection for the safety and effectiveness of the production process.
[0053] In some embodiments of the present application, the first heating element 120 and the second heating element 220 include heating plates and heating wires.
[0054] It is understood that the first heating element 120 and the second heating element 220 can be formed of either a heating plate or a heating wire, providing greater flexibility and adaptability in the heating performance of the hot runner nozzle. The heating plate provides uniform heating, while the heating wire responds more quickly to temperature changes, enabling precise temperature control. This not only improves overall heating efficiency but also meets the temperature requirements of different plastic materials during the melting process.
[0055] Working principle of the present invention: The fluid enters the second flow channel 210 in the inner shell 200 through the first flow channel 110 at the top of the outer shell 100. During this process, the first heating element 120 on the outside of the first flow channel 110 and the second heating element 220 on the outside of the second flow channel 210 heat the molten plastic respectively to ensure that the temperature is uniform and meets the melting requirements of the material. The temperature sensor 400 monitors the temperature changes in the flow channel in real time and feeds back the data to the controller 300. The controller 300 adjusts the power of the heating element according to the feedback to maintain the optimal melting state. The design of the sealing gasket 130 and the thermal insulation layer effectively prevents the leakage of molten material and heat loss, thereby improving the overall energy efficiency and safety. Finally, the molten plastic flows out of the hot nozzle smoothly, completing the injection molding or molding process, and providing high-quality finished products for production.
[0056] Those skilled in the art will understand that the above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art will be able to modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein with equivalents. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.
Claims
1. A hot runner nozzle, characterized in that: include: a housing, wherein a first flow channel is provided at an upper portion of the housing, and a first heating element is provided outside the first flow channel; an inner shell, disposed inside the outer shell, with a second flow channel disposed in the middle of the inner shell, the second flow channel connected to the bottom of the first flow channel, and a second heating element disposed on the outer side of the second flow channel; The controller is arranged on the housing and is electrically connected to the first heating element and the second heating element respectively.
2. The hot runner nozzle according to claim 1, characterized in that: There are two second heating elements, one of which is arranged at one end of the second flow channel close to the first heating element, and the other of which is arranged at one end of the second flow channel away from the first heating element.
3. The hot runner nozzle according to claim 1, characterized in that: The hot runner nozzle further includes a temperature sensor, which is electrically connected to the controller and includes: a first sensor, disposed on an outer wall of the first flow channel, and configured to monitor a temperature of the fluid in the first flow channel; The second sensor is arranged on the outer wall of the second flow channel, and is used to monitor the temperature of the fluid in the second flow channel.
4. The hot runner nozzle according to claim 3, characterized in that: Two second sensors are provided, wherein one second sensor is provided at an end of the second flow channel close to the first heating element, and the other second sensor is provided at an end of the second flow channel away from the first heating element.
5. The hot runner nozzle according to claim 1, characterized in that: The housing further comprises: A sealing gasket is disposed between the outer shell and the inner shell, and the sealing gasket is also located at the bottom of the first flow channel.
6. The hot runner nozzle according to claim 1, characterized in that: The housing further comprises: The first heat insulating layer is arranged on the outer side of the first heating element.
7. The hot runner nozzle according to claim 1, characterized in that: The inner shell also includes: The second heat insulating layer is arranged on the outer side of the second heating element.
8. The hot runner nozzle according to claim 1, characterized in that: The inner shell includes a vertical portion and a necked portion, wherein the outer diameter of the upper portion of the vertical portion is smaller than the outer diameter of the lower portion, so that the inner shell abuts against the outer shell.
9. The hot runner nozzle according to claim 8, characterized in that: The shell is sleeved on the vertical portion.
10. The hot runner nozzle according to claim 1, characterized in that: The first heating element and the second heating element include: Heating plate and heating wire.