Hot runner sheath

Abstract

The embodiment of the utility model provides a hot runner sheath, which comprises a hot runner nozzle, a heating pipe sleeve and a heat exchanger, the heating pipe sleeve is sleeved with a protective sleeve. The protective sleeve is filled with a heat insulation material layer. A positioning groove is formed in the upper end of the hot runner nozzle; the protective sleeve is provided with a positioning assembly matched with the positioning groove. Through heating of the heating pipe sleeve and heat insulation of the heat insulation material layer, the temperature of injection molding fluid is stabilized, fluidity is guaranteed, and rapid injection molding is facilitated; meanwhile, the quality problems, such as rough surface, large internal stress, non-uniform shrinkage and thermal degradation, caused by excessive heating are avoided, the product quality is improved, the production efficiency is improved, and the cost is controlled.

Description

Technical Field

[0001] The utility model relates to the technical field of mold devices, in particular to a hot runner sheath. Background Art

[0002] A hot runner is a heating component system used in injection molds to inject molten plastic particles into the mold cavity. A hot runner mold is a new structure that heats the runners and sprues of a traditional mold or a three-plate mold, eliminating the need to remove the runners and sprues during each molding process.

[0003] Current hot runner injection ports lack heating and insulation functions. When the injection fluid reaches the injection port, its temperature drops to a certain extent, potentially affecting fluid flow and hindering rapid injection. Furthermore, to successfully complete the injection process, the injection molding process must be heated to a temperature higher than the melting point of the injection material to maintain the plastic in a molten state. However, excessively high temperatures can lead to surface roughness, increased internal stress, uneven shrinkage, and even thermal degradation of the molded part, impacting the mechanical properties and appearance of the plastic. Therefore, the present invention proposes a hot runner cover to at least partially address the problems that may exist in the prior art. Utility Model Content

[0004] In view of the above problems, the present invention is proposed to provide a hot runner cover that overcomes the above problems or at least partially solves the above problems.

[0005] In one embodiment of the present application, a hot runner sheath is disclosed, comprising: a hot runner nozzle,

[0006] A hot runner nozzle, the outer sleeve of which is provided with a heating tube sleeve;

[0007] The outer sleeve of the heating tube sleeve is provided with a protective sleeve;

[0008] The interior of the protective cover is filled with a heat insulation material layer;

[0009] A positioning groove is provided on the upper end of the hot runner nozzle; and a positioning component adapted to the positioning groove is provided on the protective sleeve.

[0010] Preferably, the positioning assembly comprises: a positioning frame located at the upper end of the protective cover;

[0011] A screw rod is provided in the positioning frame, one end of the screw rod passes through the positioning frame and extends to the outside; and a driving end is provided at the end of the screw rod;

[0012] A wire block is provided on the positioning frame; and a positioning rod facing the positioning groove is connected to the wire block.

[0013] Preferably, the thermal insulation material layer includes a ceramic fiber material layer, an aluminum silicate material layer and an aerogel material layer.

[0014] Preferably, the heating tube is sheathed with a heating coil, and the heating coil is electrically connected to a pulse drive circuit.

[0015] Preferably, the aerogel material layer is made of graphene aerogel, carbon nanotube-graphene aerogel, or polymer-based carbon aerogel.

[0016] Preferably, the ceramic fiber material layer is ceramic fiber felt.

[0017] The utility model has the following advantages:

[0018] In an embodiment of the present invention, a hot runner nozzle is externally sheathed with a heating sleeve; the heating sleeve is externally sheathed with a protective sleeve; the protective sleeve is filled with a layer of thermal insulation material; a positioning groove is provided at the upper end of the hot runner nozzle; and a positioning assembly is provided on the protective sleeve that matches the positioning groove. Heating from the heating sleeve and insulation from the thermal insulation material stabilize the injection fluid temperature, ensuring fluidity and facilitating rapid injection. This also avoids quality issues caused by overheating, such as surface roughness, high internal stress, uneven shrinkage, and thermal degradation, thereby improving product quality, increasing production efficiency, and controlling costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solution of the present invention, the following is a brief introduction to the drawings required for the description of the present invention. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0020] Figure 1 This is a schematic diagram of the cross-sectional structure of a hot runner jacket provided by one embodiment of the present utility model;

[0021] Figure 2 It is a structural schematic diagram of a heat-insulating material layer provided in one embodiment of the present utility model.

[0022] In the accompanying drawings: 101, hot runner nozzle; 102, heating tube sleeve; 103, protective sleeve; 104, thermal insulation material layer; 105, positioning frame; 106, positioning groove; 107, positioning rod; 108, wire block; 109, screw rod; 110, driving end; 141, ceramic fiber material layer; 142, aluminum silicate material layer; 143, aerogel material layer. DETAILED DESCRIPTION

[0023] To make the objectives, features, and advantages of the present invention more readily apparent, the present invention is further described below in detail with reference to the accompanying drawings and specific embodiments. It should be understood that the embodiments described are only a portion of the embodiments of the present invention, not all of them. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without inventive effort are also within the scope of protection of the present invention.

[0024] Reference Figure 1 and Figure 2 , shows a hot runner cover provided by an embodiment of the present invention, comprising: a hot runner nozzle 101, the outer portion of which is provided with a heating tube cover 102; the outer portion of the heating tube cover 102 is provided with a protective cover 103; the interior of the protective cover 103 is filled with a heat insulation material layer 104; a positioning groove 106 is provided at the upper end of the hot runner nozzle 101; and a positioning component adapted to the positioning groove 106 is provided on the protective cover 103.

[0025] In this application, a heating sleeve 102 is provided on the outside of the hot runner nozzle 101. The heating sleeve 102 heats the hot runner nozzle 101, maintaining the appropriate temperature of the injected fluid as it flows through the nozzle. This effectively compensates for the lack of a heating function in the original injection port, thereby ensuring fluid mobility and facilitating rapid injection molding. This increases the speed of injection molding production, allowing more molded parts to be produced per unit time, thereby improving production efficiency.

[0026] The heat insulating material layer 104 filled in the protective cover 103 can reduce heat loss to the external environment, further ensuring the temperature stability of the injection fluid at the injection port, avoiding temperature drop due to heat loss, and thus maintaining good fluidity.

[0027] The hot runner nozzle 101 can be accurately heated by the heating sleeve 102, so that the injection molding material does not need to be heated to an excessively high temperature. Compared with the prior art which needs to raise the temperature to a temperature much higher than the melting point, the present application can maintain a molten state. Through heating and heat insulation measures, the temperature environment required for injection molding can be maintained more stably, avoiding the phenomena such as rough plastic surface, increased internal stress, uneven shrinkage and thermal degradation caused by excessive heating, ensuring the mechanical properties and appearance quality of the plastic, improving the dimensional accuracy and stability of the injection molded parts, enhancing the mechanical properties of the product, and reducing the risk of product failure due to internal quality problems. At the same time, stable temperature control can make more rational use of energy and avoid energy waste caused by excessive heating.

[0028] In one embodiment of the present application, Figure 1As shown, the positioning assembly includes: a positioning frame 105 located at the upper end of the protective cover 103; a screw rod 109 is provided in the positioning frame 105, one end of the screw rod 109 passes through the positioning frame 105 and extends to the outside; and a driving end 110 is provided at the end of the screw rod 109; a wire block 108 is provided on the positioning frame 105; and a positioning rod 107 is connected to the wire block 108 facing the positioning groove 106.

[0029] Through the structure of the screw rod 109, the screw block 108, and the positioning rod 107 in the positioning assembly, the position of the positioning rod 107 can be precisely controlled by rotating the driving end 110, thereby achieving precise positioning of the protective cover 103 and the hot runner nozzle 101. This helps to improve the accuracy and stability of the entire hot runner cover installation and ensure the effective heating and thermal insulation functions.

[0030] The position of the positioning rod 107 can also be adjusted according to actual needs to adapt to hot runner nozzles of different specifications or usage scenarios, thereby improving the versatility and flexibility of the hot runner cover. The driving end 110 can be set to an internal hexagonal style and adjusted by corresponding tools.

[0031] In one embodiment of the present application, Figure 2 As shown, the thermal insulation material layer 104 includes a ceramic fiber material layer 141 , an aluminum silicate material layer 142 and an aerogel material layer 143 .

[0032] The thermal insulation layer 104 is composed of a ceramic fiber layer 141, an aluminum silicate layer 142, and an aerogel layer 143. The ceramic fiber material offers excellent high-temperature resistance and thermal stability; the aluminum silicate material has low thermal conductivity and excellent thermal insulation; and the aerogel material is a superior thermal insulation material. The combination of these three materials leverages their respective strengths, significantly improving thermal insulation and better maintaining the temperature of the fluid injected into the hot runner nozzle.

[0033] In one embodiment of the present application, the heating tube sleeve 102 is provided with a heating coil, and the heating coil is electrically connected to a pulse driving circuit.

[0034] A heating coil is provided in the heating tube sleeve 102 and connected to a pulse drive circuit. The pulse drive circuit can achieve precise control of the heating coil and adjust the heating power through the pulse signal, thereby heating the hot runner nozzle quickly and efficiently. At the same time, the temperature can be more accurately controlled according to the injection molding requirements to avoid excessive temperature.

[0035] It should be noted that the heating drive of the heating coil by the pulse drive circuit is a conventional technical means in electrothermal conversion and will not be elaborated here.

[0036] In one embodiment of the present application, the aerogel material layer 143 is made of graphene aerogel, carbon nanotube-graphene aerogel, or polymer-based carbon aerogel.

[0037] The aerogel material layer 143 is made of graphene aerogel, carbon nanotube-graphene aerogel, or polymer-based carbon aerogel. Aerogel materials offer superior thermal insulation, lower density, and higher strength compared to traditional materials. This can further enhance the thermal insulation performance of the insulation layer, reduce the weight of the hot runner jacket, and provide greater stability in high-temperature environments.

[0038] In one embodiment of the present application, the ceramic fiber material layer 141 is a ceramic fiber felt. The ceramic fiber felt has the characteristics of interwoven fibers, uniform texture, and good flexibility. It can better fill the space within the protective cover 103, improve the integrity and stability of the thermal insulation material layer, and thus further enhance the thermal insulation effect.

[0039] As an example, in the production of plastic injection molded parts in industrial automation equipment, such as the plastic joint housings of automated robotic arms, stable performance is required during long-term use. Ceramic fiber felt, as part of the thermal insulation layer, can effectively ensure the thermal insulation effect of the hot runner, stabilize the injection molding process, and improve the quality and service life of the injection molded parts.

[0040] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0041] Although the preferred embodiments of the present invention have been described, those skilled in the art may make additional changes and modifications to these embodiments once they are aware of the basic creative concepts. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the present invention.

[0042] Finally, it should be noted that, in this document, relational terms such as first and second, etc., are used only 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 "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or terminal device that includes a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or terminal device. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of additional identical elements in the process, method, article, or terminal device that includes the element.

[0043] The hot runner sleeve provided by the present invention is introduced in detail above. Specific examples are used herein to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method and core idea of ​​the present invention. At the same time, for those skilled in the art, according to the idea of ​​the present invention, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. A hot runner jacket, characterized in that: include: A hot runner nozzle (101) having an outer sleeve provided with a heating tube sleeve (102); The outer cover of the heating tube cover (102) is provided with a protective cover (103); The interior of the protective cover (103) is filled with a heat insulation material layer (104); A positioning groove (106) is provided at the upper end of the hot runner nozzle (101); and a positioning component adapted to the positioning groove (106) is provided on the protective sleeve (103).

2. The hot runner jacket according to claim 1, characterized in that: The positioning assembly comprises: a positioning frame (105) located at the upper end of the protective cover (103); A screw rod (109) is provided in the positioning frame (105), one end of the screw rod (109) passes through the positioning frame (105) and extends to the outside; and a driving end (110) is provided at the end of the screw rod (109); A wire block (108) is provided on the positioning frame (105); a positioning rod (107) facing the positioning groove (106) is connected to the wire block (108).

3. The hot runner jacket according to claim 1, characterized in that: The thermal insulation material layer (104) comprises a ceramic fiber material layer (141), an aluminum silicate material layer (142), and an aerogel material layer (143).

4. The hot runner jacket according to claim 1, characterized in that: The heating tube sleeve (102) is provided with a heating coil, and the heating coil is electrically connected to a pulse drive circuit.

5. The hot runner jacket according to claim 3, characterized in that: The aerogel material layer (143) is made of graphene aerogel, carbon nanotube-graphene aerogel, or polymer-based carbon aerogel.

6. The hot runner jacket according to claim 3, characterized in that: The ceramic fiber material layer (141) is ceramic fiber felt.

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