Heat insulation structure of hot runner

Abstract

The utility model provides a heat insulation structure of a hot runner. The heat insulation structure comprises a pipeline, a nozzle head, a heating structure and a heat conduction structure, the heating structure is arranged on the surface of the outer wall of the upper middle position of the pipeline through a connecting piece. The pipeline is arranged in the connecting piece; the open end of the pipeline is embedded into the head end of the nozzle head through the connecting piece, and the tail end of the pipeline extends out of the tail end of the nozzle head to be connected with a fixing piece. The open end of the pipeline is connected with the head end of the nozzle head, and the heat conduction structure is located on the nozzle head and arranged at the joint of the pipeline and the nozzle head. The thermal efficiency and the stability of the hot runner system are improved, and through ingenious combination of a thermal insulation structure and a heat conduction structure, the energy loss is reduced, and key components of the system are protected, so that the service life of a mold is prolonged, and the product quality and the production efficiency are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of plastic processing, in particular to a hot runner heat insulation structure. Background Technique

[0002] The hot runner ensures that the plastic in the runner and the gate remains in a molten state by heating.

[0003] Since heating rods and heating coils are provided near or at the center of the runner, the entire runner from the outlet of the injection nozzle to the gate is in a high-temperature state, keeping the plastic in the runner in a molten state.

[0004] Combined with the above, due to precise injection molding, the hot runner of the prior art is usually close to the mold core, resulting in the high temperature of the hot runner being transferred to the mold core, making the temperature of the mold core relatively high, and ultimately leading to a large deformation degree of the injection molded product, so the rejection rate is relatively high. Content of the Utility Model

[0005] In view of the above problems, the present utility model is proposed to provide a hot runner heat insulation structure that overcomes or at least partially solves the above problems.

[0006] To solve the above problems, the present utility model discloses a hot runner heat insulation structure, including a pipeline, a nozzle head, a heating structure and a heat conduction structure; the heating structure is arranged on the outer wall surface at the upper position of the pipeline through a connecting piece; the pipeline is arranged inside the connecting piece; the open end of the pipeline is embedded into the inside of the head end of the nozzle head through the connecting piece, and the tail end extends out of the tail end of the nozzle head and is connected to a fixing piece; the open end of the pipeline is connected to the head end of the nozzle head, and the heat conduction structure is arranged at the connection between the two on the nozzle head.

[0007] Preferably, the heating structure is arranged as a spiral heating coil.

[0008] Preferably, the nozzle head includes a nozzle and a heat insulation cap; the heat conduction structure is arranged between the nozzle and the heat insulation cap; the nozzle is connected to the open end of the pipeline; the heat insulation cap wraps the connecting piece.

[0009] Preferably, the heat conduction structure includes a heat dissipation plate, a heat conduction plate and heat conduction wires arranged on the heat conduction plate according to a preset position; the heat conduction plate is connected to the heat dissipation plate through the heat conduction wires; the heat conduction plate is respectively connected to the nozzle and the heat insulation cap.

[0010] Preferably, the heat conduction plate and the heat conduction wires are made of graphene material.

[0011] Preferably, it further includes a fixing plate and a mold; the fixing plate is connected to the nozzle head; the mold is movably arranged at a position close to the head end of the nozzle head at a preset distance.

[0012] The present utility model has the following advantages:

[0013] Efficient heat conduction and heat insulation: The combination of the heat conduction structure and the heating structure enables rapid heat conduction through materials with high thermal conductivity (such as graphene), while using the heat insulation cap to reduce heat dissipation, ensuring the accuracy of thermal efficiency and temperature control.

[0014] Structural stability and flexibility: The setting of the fixing parts and the fixing plate ensures the stability and reliability of the structure, while the movable setting of the mold and the nozzle head provides operation flexibility, facilitating adjustment and maintenance.

[0015] Temperature uniformity: The use of the spiral heating coil ensures uniform temperature in the upper position of the pipeline, avoiding the influence of local overheating or uneven temperature on the injection molding quality.

[0016] Maintenance and cost control: The setting of the heat insulation cap and the heat conduction structure not only reduces energy consumption but also extends the service life of the hot runner system, reducing maintenance costs and energy consumption.

[0017] Precise temperature control and production efficiency: The use of graphene material, combined with the layout of the heat conduction plate and the heat conduction wire, can precisely control the temperature, improving production efficiency and product quality. Description of the Drawings

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the following will briefly introduce the drawings required to be used in the embodiments. It should be understood that the following drawings only show some embodiments of the present utility model, and therefore should not be regarded as limiting the scope. For those of ordinary skill in the art, without creative efforts, other relevant drawings can also be obtained based on these drawings.

[0019] Figure 1 is the main structural schematic diagram of a hot runner heat insulation structure provided in an embodiment of the present utility model;

[0020] Figure 2 is the overall structural schematic diagram of a hot runner heat insulation structure provided in an embodiment of the present utility model.

[0021] In the figure: 100, pipeline; 101, fixing part; 200, nozzle head; 201, nozzle; 202, heat insulation cap; 300, heating structure; 400, heat conduction structure; 401, heat conduction plate; 402, heat conduction wire; 403, heat dissipation plate; 500, connecting part; 600, fixing plate; 700, mold. Detailed Embodiments

[0022] To make the objectives, technical solutions, and advantages of the embodiments of the present utility model clearer, the following will clearly and completely describe the technical solutions in the embodiments of the present utility model with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are some, but not all, of the embodiments of the present utility model. Generally, the components of the embodiments of the present utility model described and illustrated in the accompanying drawings here can be arranged and designed in various different configurations.

[0023] The following will describe in detail some embodiments of the present application with reference to the accompanying drawings. Without conflict, the various embodiments and the various features in the embodiments below can be combined with each other.

[0024] Please refer to Figure 1 and Figure 2 As shown, the embodiments of the present utility model provide a hot runner heat insulation structure, including a pipe 100, a nozzle head 200, a heating structure 300, and a heat conduction structure 400. The heating structure 300 is disposed on the outer wall surface at the upper position of the pipe 100 through a connecting member 500. The pipe 100 is disposed inside the connecting member 500. The open end of the pipe 100 is embedded into the inside of the head end of the nozzle head 200 through the connecting member 500, and the tail end extends out of the tail end of the nozzle head 200 and is connected to a fixing member 101. The open end of the pipe 100 is connected to the head end of the nozzle head 200, and the heat conduction structure 400 is disposed at the connection between the two on the nozzle head 200.

[0025] As a preferred embodiment, the heating structure 300 is arranged as a spiral heating coil. Specifically, the spiral heating coil arrangement is an efficient heating method. The heating element is wound around the outer wall of the pipe through the connecting member 500 in a spiral shape, ensuring uniform distribution and transfer of heat. It can keep the molten plastic in the hot runner at a stable temperature, avoiding local overheating or temperature fluctuations, thereby improving the quality and production efficiency of injection molded parts. At the same time, the use of the spiral heating coil can also reduce energy loss and improve thermal efficiency.

[0026] As a preferred embodiment, the nozzle head 200 includes a nozzle 201 and a heat insulation cap 202. The heat conduction structure 400 is disposed between the nozzle 201 and the heat insulation cap 202. The nozzle 201 is connected to the open end of the pipe 100. The heat insulation cap 202 wraps the connecting member 500. Specifically, the nozzle 201 is directly connected to the open end of the pipe 100, ensuring smooth flow of the melt from the hot runner to the mold cavity. The heat conduction structure 400 is disposed between the nozzle 201 and the heat insulation cap 202, which can effectively conduct the heat of the heating structure 300 and ensure uniform temperature at the nozzle head 200.

[0027] Furthermore, the above-mentioned heat insulation cap 202 wraps the connecting piece 500, aiming to reduce the influence of the external environment on the hot runner system, prevent the rapid dissipation of heat, and at the same time protect the connecting piece 500 from external mechanical damage or temperature fluctuations, thereby extending the service life of the system.

[0028] As a preferred implementation manner, the heat conduction structure 400 includes a heat dissipation plate 403, a heat conduction plate 401, and heat conduction lines 402 arranged and distributed on the heat conduction plate 401 according to a preset position; the heat conduction plate 401 is connected to the heat dissipation plate 403 through the heat conduction lines 402; the heat conduction plate 401 is respectively connected to the nozzle head 201 and the heat insulation cap 202; specifically, the heat conduction lines 402 are laid on the heat conduction plate 401 according to a preset position, which can ensure that heat is evenly conducted from the heating structure 300 to the entire heat conduction plate 401, and then to the nozzle head 201, avoiding local overheating or uneven temperature, and ensuring the fluidity of the molten plastic; the heat conduction plate 401 is in direct contact with the nozzle head 201 and the heat insulation cap 202, and can quickly transfer the heat to the heat dissipation plate 403 through the heat conduction lines 402; the use of the heat conduction lines 402 further improves the efficiency and uniformity of heat conduction; the setting of the heat dissipation plate 403 can quickly dissipate the heat conducted from the heat conduction plate 401, avoiding overheating and protecting the stability and safety of the hot runner system.

[0029] Furthermore, the heat conduction plate 401 is connected to the nozzle head 201 and the heat insulation cap 202, forming a compact structure, increasing the structural stability of the entire nozzle head 200, and at the same time facilitating installation and maintenance.

[0030] As a preferred implementation manner, the heat conduction plate 401 and the heat conduction lines 402 are made of graphene material; specifically, graphene can quickly conduct and dissipate heat, effectively improving the heat management efficiency; graphene has excellent stability at high temperatures and can withstand temperatures up to about 3000°C in an oxygen-free environment; the thermal expansion coefficient of graphene is small, which helps to maintain the dimensional stability of the hot runner structure during temperature changes; graphene has good chemical stability and is not easy to react with other materials, which helps to maintain the long-term performance of the heat conduction structure; the heat conduction plate 401 and the heat conduction lines 402 made of graphene material can provide excellent heat conduction performance and stable heat management, and are suitable for the setting and application of high-performance hot runner systems.

[0031] As a preferred embodiment, it further includes a fixing plate 600 and a mold 700; the fixing plate 600 is connected to the nozzle head 200; the mold 700 is movably arranged at a position close to the head end of the nozzle head 200 according to a preset distance; specifically, the connection between the fixing plate 600 and the nozzle head 200 ensures the stable position of the nozzle head 200, which is beneficial to accurately control the point where the melt is injected into the mold 700, improving the product quality and the finished product rate; the mold 700 is movably arranged at a position close to the head end of the nozzle head 200 according to a preset distance. Such a setting allows fine-tuning the distance between the mold 700 and the nozzle head 200 according to product requirements or changes in the mold 700, ensuring that the melt accurately enters the mold 700 and adapting to the production of products with different thicknesses or shapes; the movable mold 700 can be easily disassembled and replaced, facilitating the maintenance and cleaning of the mold 700; improving the use efficiency of the equipment and reducing the production cost.

[0032] Working principle: The spiral heating coil of the heating structure 300 is arranged on the outer wall surface of the middle upper position of the pipeline 100 through the connecting piece 500, directly acting on the pipeline 100 to provide heat energy; the heat energy generated by heating is efficiently conducted to between the nozzle 201 and the heat insulation cap 202 through the heat conduction structure 400, which includes a heat conduction plate 401 made of graphene material and heat conduction wires 402. The high heat conductivity of the graphene material ensures the rapid and uniform distribution of heat; the heat conduction wires 402 on the heat conduction plate 401 are laid according to the preset positions, ensuring the uniform distribution of the heat transferred from the heating structure 300 for heat conduction and dissipation, and then transferred to the nozzle 201; the heat dissipation plate 403 helps to dissipate the excess heat, avoiding the excessive accumulation of heat energy and maintaining the temperature stability of the system; the nozzle 201 is connected to the open end of the pipeline 100. When the molten plastic passes through the pipeline 100, it reaches the set temperature after heating. By adjusting the heating structure 300 and the heat conduction structure 400, the temperatures of the pipeline 100 and the nozzle 201 can be accurately controlled, ensuring that the molten plastic is injected into the mold in the best state, improving the molding quality and production efficiency of the product.

[0033] Finally, it should also be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "including", "comprising" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or terminal device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or terminal device. Without further limitation, an element defined by the statement "including a..." does not exclude the existence of additional identical elements in the process, method, article or terminal device including the said element.

[0034] The above has introduced in detail a hot runner heat insulation structure provided by the present utility model. Specific examples are used in this article to elaborate on the principle and implementation manner of the present utility model. The description of the above embodiments is only used to help understand the method and its core idea of the present utility model; at the same time, for those of ordinary skill in the art, according to the idea of the present utility model, there will be changes in the specific implementation manner and application scope. In summary, the content of this specification should not be construed as a limitation to the present utility model.

Claims

1. A hot runner insulation structure, characterized in that: It includes a nozzle head, a pipeline, a heating structure and a heat-conducting structure; The heating structure is arranged on the outer wall surface at the upper position of the pipeline through a connecting piece; The pipeline is arranged inside the connecting piece; The open end of the pipeline is embedded in the head end of the nozzle head through the connecting piece, and the tail end extends out of the tail end of the nozzle head and is connected to the fixing piece; The open end of the pipeline is connected to the head end of the nozzle head, and the heat conduction structure is located on the nozzle head and arranged at the connection between the two.

2. The hot runner insulation structure according to claim 1, characterized in that: The heating structure is a spiral heating coil arrangement.

3. The hot runner insulation structure according to claim 1, characterized in that: The nozzle head comprises a nozzle and a heat-insulating cap; the heat-conducting structure is arranged between the nozzle and the heat-insulating cap; the nozzle is connected to the open end of the pipeline; and the heat-insulating cap wraps the connecting piece.

4. The hot runner insulation structure according to claim 3, characterized in that: The heat-conducting structure includes a heat dissipation plate, a heat-conducting plate, and heat-conducting wires arranged and distributed on the heat-conducting plate according to preset positions; The heat conducting plate is connected to the heat dissipating plate via the heat conducting wire; The heat conducting plate is connected to the nozzle and the heat insulating cap respectively.

5. The hot runner insulation structure according to claim 4, characterized in that: The heat conducting plate and the heat conducting wire are made of graphene material.

6. The hot runner insulation structure according to claim 1, characterized in that: It also includes a fixing plate and a mold; the fixing plate is connected to the nozzle head; the mold can be movably arranged at a position close to the head end of the nozzle head according to a preset distance.

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