Injection molding mold based on high-frequency electric field assisted functional filler directional arrangement, injection molding equipment

Abstract

The utility model discloses a kind of function filler directional arrangement's injection molding mould based on high-frequency electric field auxiliary, injection molding equipment, injection molding mould includes movable die assembly;Fixed die assembly, movable die assembly is oppositely arranged, movable die assembly and fixed die assembly between with mould cavity, fixed die assembly is provided with main runner and shunt, main runner and shunt are all communicated with mould cavity;Electricity connection component, including first electrode piece and second electrode piece, first electrode piece is connected with one of movable die and fixed die, second electrode piece is connected with another of movable die assembly and fixed die assembly, first electrode piece, second electrode piece and mould cavity are same side setting;High-frequency generator is set to the outside of mould cavity, and high-frequency generator is electrically connected with electricity connection component.Injection molding equipment has applied the injection molding mould above.

Description

Technical Field

[0001] This utility model relates to the field of injection molding production technology, and in particular to an injection molding mold and injection molding equipment based on the directional arrangement of functional fillers assisted by a high-frequency electric field. Background Technology

[0002] The key technologies for anisotropic properties of materials can not only significantly improve performance in specific directions, but also effectively reduce the amount of expensive fillers used, which has important economic value and technical significance.

[0003] Currently, the main technical means to achieve directional alignment of fillers include stress field induction, magnetic field induction, and electric field induction. While stress field induction is simple to operate, it requires a large tensile force and is generally only suitable for the production of thin-walled products such as films and sheets, and the filler alignment direction is limited by the tensile direction. Although magnetic field induction can achieve good alignment results, it requires a high-intensity magnetic field generator, resulting in large equipment investment and high energy consumption, limiting its application in actual production. Electric field induction, as an emerging alignment technology, has advantages such as low energy consumption and high control precision, but its application in injection molding still faces many technical challenges.

[0004] In existing technologies, electric field-assisted orientation technology is mostly applied to thin film extrusion or solution casting processes. However, for complex processing environments like injection molding, which involve high pressure and high temperature, achieving stable electric field application and precise filler orientation control remains a technological challenge. Particularly in mold structure design, ensuring both mold sealing and structural strength during high-pressure injection, as well as ensuring the uniform distribution and effective operation of the high-frequency electric field, presents new technical requirements for electrode arrangement, insulation protection, and electrical connections. Furthermore, existing injection molding equipment lacks a coordinated control mechanism with the high-frequency electric field system, making it difficult to achieve precise matching between filler orientation and injection process parameters. Utility Model Content

[0005] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes an injection molding die and injection molding equipment based on the directional arrangement of functional fillers assisted by a high-frequency electric field. This has the advantages of achieving stable electric field application under high pressure and high temperature injection molding conditions, ensuring the structural strength and sealing of the mold, and improving the directional arrangement accuracy of the functional fillers.

[0006] In a first aspect, according to an embodiment of the present invention, an injection molding die for directional arrangement of functional fillers based on high-frequency electric field-assisted arrangement includes: Dynamic model components; A fixed mold assembly is disposed opposite to the moving mold assembly, and a cavity is provided between the moving mold assembly and the fixed mold assembly. The fixed mold assembly is provided with a main runner and a branch runner, and the main runner and the branch runner are connected to the cavity. The electrical connection assembly includes a first electrode and a second electrode. The first electrode is connected to one of the moving mold and the fixed mold, and the second electrode is connected to the other of the moving mold assembly and the fixed mold assembly. The first electrode and the second electrode are disposed on the same side as the cavity. A high-frequency generator is disposed outside the cavity, and the high-frequency generator is electrically connected to the power connection component.

[0007] According to an embodiment of this utility model, an injection molding die for directional arrangement of functional fillers based on high-frequency electric field assistance has at least the following beneficial effects: This application constructs a molding cavity using a moving mold assembly and a fixed mold assembly, and arranges electrical connection components on the same side of the cavity. A high-frequency electric field generated by a high-frequency generator acts on the molten material within the cavity, causing the functional fillers to directionally align under the influence of the electric field. The relative arrangement of the moving and fixed molds forms a closed molding space, with the main runner and branch runner serving as melt injection channels to ensure material flow. The first and second electrode components are respectively connected to the moving and fixed molds, forming a same-side layout of the two electric field poles, so that the electric field direction forms a specific angle with the material flow direction, enhancing the orientation effect of the fillers during flow. The high-frequency generator is externally placed within the cavity to avoid interfering with the mold structure, and the electric field strength can be controlled and adjusted through electrical connection. This design eliminates the dependence on mechanical stretching or strong magnetic fields, achieving directional arrangement of fillers through a high-frequency electric field, reducing equipment complexity and production costs.

[0008] According to an embodiment of the present invention, an injection molding die based on the directional arrangement of functional fillers assisted by a high-frequency electric field further includes an insulating component, wherein the insulating component is disposed on the same side as the fixed mold assembly and / or the moving mold assembly, and the insulating component partially surrounds the first electrode component and / or the second electrode component.

[0009] According to an embodiment of the present invention, an injection molding die based on the directional arrangement of functional fillers assisted by a high-frequency electric field further includes a wiring channel, which passes through the insulating component, the moving mold and / or the fixed mold in sequence, and the connecting wire of the high-frequency generator can be connected to the first electrode component and / or the second electrode component through the wiring channel.

[0010] According to an embodiment of the present invention, an injection molding die for a functional filler oriented arrangement based on a high-frequency electric field assisted by the present invention is provided with a terminal post for the first electrode and / or the second electrode, the free end of the terminal post extending into the wiring channel, and the connecting wire of the high-frequency generator being connected to the terminal post.

[0011] According to an embodiment of the present invention, an injection molding die based on the directional arrangement of functional fillers assisted by a high-frequency electric field further includes a gating sleeve, wherein the gating sleeve has a hollow structure to form the main runner, and the gating sleeve is detachably connected to the fixed mold.

[0012] An injection molding die based on the directional arrangement of functional fillers assisted by a high-frequency electric field, according to an embodiment of the present invention. Secondly, the injection molding equipment according to the embodiments of the present utility model includes: Injection molding dies; An injection device includes a feeding assembly and a heating assembly. The feeding assembly includes a barrel, a screw propeller, and an injection drive. The barrel has an inlet for feeding raw materials. The screw propeller is disposed inside the barrel, and one end of the barrel is connected to the main channel. The injection drive is driven by the screw propeller and can drive the screw propeller to rotate. The heating assembly is connected to the barrel and is used to heat the raw materials inside the barrel, causing the raw materials inside the barrel to melt. The control device is electrically connected to the high-frequency generator and the injection device. The injection molding equipment according to the embodiments of this utility model has at least the following beneficial effects: This application integrates a high-frequency electric field-assisted mold and an injection device to form a collaborative system, achieving integrated control of filler orientation and injection molding. The injection mold generates an electric field through a high-frequency generator to induce filler orientation. The injection device injects molten raw material into the mold cavity through a screw propulsion component. The heating component ensures that the raw material is fully melted to maintain filler fluidity. The control device synchronously regulates the application of the high-frequency electric field and the injection process through electrical connection, so that the electric field effect and the melt flow state are precisely matched. Among them, the structural design of the barrel and the main channel connecting ensures that the molten raw material is directly injected into the electric field effect area, avoiding secondary flow that damages the filler orientation; the injection drive component drives the screw propulsion component to rotate to achieve continuous material supply and maintain stable injection pressure; the layout of the heating component covering the outside of the barrel can uniformly heat the raw material and prevent local overheating that leads to uneven filler distribution. The entire set of equipment achieves dynamic coordination between high-frequency electric field parameters and injection process parameters through the control device, improving injection efficiency while ensuring the filler orientation effect.

[0013] An injection molding apparatus according to an embodiment of the present invention further includes a nozzle, one end of which is connected to the barrel and the other end of which is connected to the main runner.

[0014] According to an embodiment of the present invention, an injection molding apparatus includes a heating component that covers the exterior of the barrel, and a plurality of the heaters are arranged at intervals along the radial direction of the barrel.

[0015] An injection molding equipment according to an embodiment of the present invention further includes a feeding assembly, the feeding assembly including a feeding hopper, the feeding hopper being connected to the inlet.

[0016] According to an embodiment of the present invention, an injection molding device further includes a gear transmission mechanism, wherein the output end of the injection drive is connected to the input end of the gear transmission mechanism, and one end of the screw pusher is connected to the output end of the gear transmission mechanism.

[0017] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0018] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which: Figure 1 This is a schematic diagram of the structure of the injection molding die according to an embodiment of the present utility model; Figure 2 This is a schematic diagram of the injection molding equipment according to an embodiment of the present utility model; Explanation of reference numerals in the attached figures: Moving model component 1; Fixed mold component 2; First electrode 3; Second electrode 4; High frequency generator 5; Insulating component 6; Wiring channel 7; Terminal post 8; Sprue 9; Main channel 9-1; Barrel 10; Screw propulsion component 11; Injection drive component 12; Nozzle 13; Heater 14; Feed hopper 15; Gear transmission mechanism 16; Cavity 17. Detailed Implementation

[0019] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0020] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0021] In the description of a utility model, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. If the terms "first" and "second" are used, they are merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly specifying the number of indicated technical features or the order of the indicated technical features.

[0022] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0023] In existing technologies, polymer-based composite materials achieve anisotropic conductivity through the directional arrangement of functional fillers. However, existing methods rely on high tensile forces or strong magnetic fields, resulting in complex equipment and limited applications. For example, the tensile method requires a large draw ratio and is only suitable for thin film products, while the magnetic field method requires expensive electromagnets and is difficult to promote. Injection molding, as an efficient processing method, faces the technical challenge of achieving directional arrangement of fillers during melt flow.

[0024] To address the aforementioned issues, an external field-assisted approach was considered, revealing that high-frequency electric fields have a significant orientation effect on polar fillers, and their intensity can be flexibly adjusted. Traditional electric field application methods suffer from problems such as electrode arrangement interfering with the mold structure and mismatch between the electric field direction and the flow direction. By integrating the electrodes on the same side of the mold parting surface, the electric field direction forms an angle with the melt flow, avoiding structural interference and enhancing the orientation effect. A high-frequency generator can produce an alternating electric field to promote dynamic orientation of the filler, while the external design ensures mold sealing and safety.

[0025] Reference Figure 1 This utility model provides an injection molding die for directional arrangement of functional fillers based on high-frequency electric field-assisted filling, including a moving mold assembly 1, a fixed mold assembly 2, an electrical connection assembly, and a high-frequency generator 5. The moving mold assembly 1 and the fixed mold assembly 2 are arranged opposite each other to form a cavity 17. The fixed mold assembly 2 has a main runner 9-1 and a branch runner (not shown) communicating with the cavity 17. The electrical connection assembly includes a first electrode 3 and a second electrode 4 respectively connecting the moving mold and the fixed mold, both arranged on the same side as the cavity 17. The high-frequency generator 5 is externally located in the cavity 17 and electrically connected to the electrical connection assembly.

[0026] The moving mold assembly 1 refers to the movable mold part, which can be implemented using a template structure with an ejector mechanism. It is used to mold one side of the product contour and achieve demolding. The fixed mold assembly 2 refers to the fixed mold part, which can be implemented using a template structure with a gating system. Its main runner 9-1 is the channel for the melt to be injected into the cavity 17. The electrical connection assembly refers to the combination of conductive elements, which can be implemented using a composite structure of copper alloy electrodes and an insulating substrate. The same-side layout makes the electric field direction form an angle of 30° to 90° with the melt flow direction. The high-frequency generator 5 refers to the electromagnetic signal generating device, which can be implemented using a radio frequency power supply with a frequency range of 1kHz to 100MHz. It is connected to the electrodes through a coaxial cable to generate an alternating electric field.

[0027] Specifically, after the molten material is injected into the cavity 17 through the main channel 9-1 and the branch channel (not shown in the figure), the high-frequency generator 5 outputs an alternating voltage to the electrodes on the same side, forming a non-uniform electric field within the cavity 17. The functional filler is polarized under the influence of the electric field and aligns in the direction of the electric field. Due to the angle between the electric field direction and the melt flow direction, the filler exhibits a three-dimensional ordered arrangement under the coupling effect of shear flow and electric field force. The integrated design of the electrode components and the mold avoids interference with the structure of the cavity 17, and the external high-frequency generator 5 is connected via shielded wires to ensure the stability of the electric field.

[0028] Beneficially, this solution combines mold-integrated electrodes with a high-frequency electric field to directly orient filler during injection molding, eliminating the need for post-processing. Filler orientation is completed simultaneously during the injection molding stage, eliminating reliance on mechanical stretching or strong magnetic fields and reducing equipment complexity and production costs. The high-frequency electric field can precisely control the filler orientation angle, making it suitable for large-scale production of complex structures. Furthermore, the same-side electrode layout optimizes the electric field distribution efficiency and improves the orderly arrangement of the filler, providing an efficient solution for the preparation of functionalized composite materials.

[0029] According to some embodiments of this application, as shown in the figures, both the fixed mold assembly 2 and the moving mold assembly 1 are connected to an insulating member 6. Furthermore, the insulating member 6 on the fixed mold assembly 2 partially surrounds the first electrode member, and conversely, the insulating member 6 on the moving mold assembly 1 partially surrounds the second electrode member.

[0030] It should be noted that the insulating component 6 refers to an isolation component made of non-conductive material, specifically polytetrafluoroethylene or ceramic material, used to block direct contact between the electrode and the metal parts of the mold, preventing current leakage or short circuit.

[0031] Partial enclosure refers to the insulating component 6 covering only a local area of ​​the electrode component. Specifically, it can be achieved by using a ring-shaped covering or a side covering, leaving the side of the electrode component facing the cavity 17 exposed, so as to ensure that the high-frequency electric field can penetrate into the cavity 17.

[0032] Specifically, the insulating component 6 is positioned on the same side as the mold assembly, creating a spatial match with the mold structure. The insulating component 6 covers the contact surface between the electrode and the mold, preventing the formation of a conductive path between the electrode and the mold metal. The area of ​​the electrode not covered by insulation directly faces the cavity 17. The high-frequency electric field acts on the functional filler in the molten material through this area, inducing its directional alignment. The physical isolation provided by the insulating component 6 is balanced with the effective conduction of the electric field, preventing the risk of short circuits between electrodes while maintaining the electric field's ability to directionally control the functional filler.

[0033] Beneficially, this solution, through a partially enclosed insulation design, blocks current leakage while retaining the window for electric field action, thus solving the negative impact of traditional insulation methods on electric field distribution. It achieves effective isolation between the electrode and the metal parts of the mold, avoiding short circuits or electric field leakage caused by electrode contact during high-frequency electric field assisted injection molding. This ensures that the electric field energy is concentrated on the functional filler in the cavity 17, improving the accuracy of the filler's directional arrangement and the stability of the mold operation.

[0034] According to some embodiments of this application, as shown in the figures, both the fixed mold assembly 2 and the moving mold assembly 1 are provided with wiring channels 7. The wiring channel 7 on the moving mold assembly 1 passes through the insulating member 6 and the moving mold assembly 1 sequentially, allowing the connecting wire of the high-frequency generator 5 to be connected to the second electrode through the wiring channel 7. Correspondingly, the wiring channel 7 on the fixed mold assembly 2 passes through the insulating member 6 and the fixed mold assembly 2 sequentially, allowing the connecting wire of the high-frequency generator 5 to be connected to the first electrode through the wiring channel 7.

[0035] It is understandable that wiring channel 7 refers to a dedicated wiring path that runs through the insulating component 6 and the mold structure. Specifically, it can be achieved by using a pre-reserved hole structure inside the mold. For example, through holes can be machined on the assembly surface of the insulating component 6 and the moving mold assembly 1 or the fixed mold assembly 2, so that the wires can extend along the inside of the mold to the electrode component.

[0036] Specifically, during mold assembly, the wiring channel 7 is pre-processed as a continuous channel penetrating the insulating component 6 and the mold body. The connecting wire, after being led out from the high-frequency generator 5, passes sequentially through the insulating component 6 and the channels of the moving or fixed mold, ultimately connecting to the terminals of the electrode component. Because the wire is confined within the channel, it will not contact moving parts during mold opening and closing, avoiding damage to the insulation layer caused by mechanical compression. Simultaneously, the metal wall of the channel forms an electromagnetic shielding layer, reducing interference from external electromagnetic signals to the high-frequency electric field. The assembly surface between the insulating component 6 and the mold is sealed using a sealing ring, further preventing molten material from seeping into the channel and causing a short circuit.

[0037] Beneficially, in traditional molds, the wires of the high-frequency generator 5 are usually directly exposed outside the mold or fixed by temporary clips, making them prone to bending and breakage due to mold movement. Furthermore, the lack of electromagnetic shielding leads to unstable signal transmission. This solution, however, uses a pre-designed wiring channel 7 inside the mold to completely embed the wires within the mold structure. This avoids direct contact between the wires and moving parts and utilizes the mold's metal material to form a natural shielding layer, ensuring stable transmission of the high-frequency electric field signal. It solves the problem of difficult wiring between the high-frequency generator 5 and the electrodes inside the mold. The dedicated channel allows for directional wire arrangement, preventing physical damage to the wires from mold movement; it also reduces the impact of external electromagnetic interference on the high-frequency electric field, ensuring the stability of the filler's directional arrangement; and the physical isolation between the insulating component 6 and the mold reduces the risk of leakage, improving equipment operational safety and maintenance convenience.

[0038] According to some embodiments of this application, as shown in the figure, both the first electrode and the second electrode are provided with terminals 8, the free end of the terminals 8 extends into the wiring channel 7, and the connecting wire of the high-frequency generator 5 is connected to the terminals 8.

[0039] It should be noted that terminal 8 refers to a conductive connection component fixed to the surface of the electrode. It can be integrated with the electrode using a threaded connection or welding method, and its free end extends in a direction aligned with the axis of the wiring channel 7. This structure confines the wire connection position within the channel, preventing interference from the external environment. The wiring channel 7 provides a closed path for the connection between the wire and terminal 8, preventing molten material from seeping in and causing a short circuit.

[0040] Specifically, after the free end of the terminal 8 extends into the wiring channel 7, the connecting wire of the high-frequency generator 5 is inserted through the channel and forms a plug-in or threaded connection with the end of the terminal 8. During the injection molding process, the inner wall of the channel forms a radial constraint on the wire, and the connection between the terminal 8 and the wire is mechanically limited by the side wall of the channel, preventing the connection from loosening due to material flow pressure or equipment vibration. At the same time, the terminal 8, as an extension structure of the electrode, transfers the conductive contact area from the surface of the electrode to the interior of the channel, preventing the electrode surface from developing an oxide layer due to repeated welding, which would affect the conductivity.

[0041] Beneficially, this solution uses the combination of terminal block 8 and channel to transfer the electrical connection point to the protected area inside the mold. At the same time, the channel structure physically fixes the connection part, which significantly improves the connection reliability. It solves the problem of easy loosening of the connection between the high frequency generator 5 wire and the electrode, realizes the rapid installation and stable contact between the wire and the electrode, avoids the uneven electric field distribution caused by connection failure, and ensures that the functional filler obtains a continuous and stable high frequency electric field during the injection molding process.

[0042] According to some embodiments of this application, as shown in the figure, the fixed mold assembly 2 is connected to a gating sleeve 9, wherein the sleeve structure is hollow to form a main channel 9-1.

[0043] It should be noted that the sprue 9 refers to an independent component with a through channel, which can be made of metal or ceramic materials. Its inner wall surface can be polished to reduce melt flow resistance. This structure replaces the fixed runner directly opened in the traditional mold body with a modular design, realizing the physical separation of the main runner 9-1 from the mold body.

[0044] Furthermore, the sprue bushing 9 is detachably connected to the fixed mold. This detachable connection means that the sprue bushing 9 and the fixed mold are assembled in a non-fixed manner, which can be achieved using threaded engagement or a snap-locking mechanism. This connection method allows the sprue bushing 9 to maintain a stable position during mold operation, while also enabling quick separation during maintenance without damaging the mold body structure.

[0045] Specifically, the sprue 9 is assembled as an independent component into a pre-set mounting position on the fixed mold, and its internal through-channel forms the transmission path for the melt to flow from the injection device to the cavity 17. When it is necessary to replace the sprue 9 with a different specification, the original sprue 9 can be removed from the fixed mold by releasing the threaded or snap-fit ​​constraints, and then a new sprue 9 with different inner diameter or length parameters can be installed. When cleaning residual melt, the sprue 9 can be disassembled separately for ultrasonic cleaning or mechanical scraping, avoiding the problem of traditional integral molds being difficult to clean thoroughly due to the fixed runner.

[0046] The advantage is that in traditional injection molding molds, the main runner 9-1 is directly machined onto the fixed mold body, with fixed and non-replaceable runner dimensions. This necessitates complete mold disassembly and complex machining for cleaning residues during mold maintenance. In contrast, this solution utilizes an independent sprue sleeve 9 structure, allowing maintenance of the main runner 9-1 to focus solely on detachable components, significantly reducing maintenance costs and downtime. Furthermore, the replaceable nature of the sprue sleeve 9 enables the same mold to adapt to different melt flow requirements without the need for remanufacturing the entire mold. This allows for rapid replacement and cleaning maintenance of the main runner 9-1 structure, resolving the technical problems of low maintenance efficiency and poor adaptability inherent in traditional fixed runners. The modular design of the sprue sleeve 9 allows for more flexible runner parameter adjustments, matching different flow characteristics to product requirements while avoiding damage to the mold body structure caused by repeated cleaning of fixed runners.

[0047] like Figure 2As shown, this application further proposes injection molding equipment, including an injection mold with directional arrangement of functional fillers assisted by a high-frequency electric field, an injection unit, and a control unit. The injection unit includes a feeding assembly and a heating assembly. The feeding assembly includes a barrel 10, a screw propeller 11, and an injection drive 12. The barrel 10 has a feed inlet, and the screw propeller 11 is placed inside the barrel 10. One end of the barrel 10 is connected to the main flow channel 9-1. The injection drive 12 is drively connected to the screw propeller 11 to drive its rotation. The heating assembly is connected to the barrel 10 to heat the raw material and melt it. The control unit is electrically connected to the high-frequency generator 5 and the injection unit.

[0048] The injection unit includes a barrel 10, a cylindrical structure that contains and transports molten raw materials. It can be made of metal and is connected to the main channel 9-1 for direct injection into the electric field region, avoiding secondary flow interference with filler orientation. The screw propeller 11 is a helical component that propels the raw materials forward through rotation. It can be driven by a servo motor to achieve continuous feeding and maintain stable injection pressure. The heating assembly is a device for heating the barrel 10. It can be a resistance wire or electromagnetic induction heater 14 covering the outer wall of the barrel 10 to ensure uniform melting of the raw materials and maintain filler flowability. The control device is an electronic system that coordinates the high-frequency electric field and injection process parameters. It can be a PLC controller that synchronously adjusts the electric field strength, frequency, injection speed, and pressure through a preset program.

[0049] Understandably, after the molten raw material is heated to a predetermined temperature within the barrel 10, it is propelled into the main runner 9-1 of the mold by the rotating screw feeder 11, and then injected into the cavity 17. The high-frequency generator 5 generates a high-frequency electric field within the cavity 17 via an electrical connection component, causing the functional filler to align oriented along the direction of the electric field. The control device monitors and adjusts the high-frequency electric field parameters and injection parameters in real time, ensuring that the filler is continuously subjected to the electric field during the melt flow process, thus ensuring that the orientation structure is maintained before cooling and solidification. The direct connection design between the barrel 10 and the main runner 9-1 reduces the melt flow path and prevents filler orientation disorder caused by excessively long paths.

[0050] Furthermore, the heating components adopt a segmented layout, for example, multiple independent temperature zones are arranged at intervals along the axial direction of the barrel 10 to achieve gradient heating of the raw materials and avoid local overheating. The injection drive 12 transmits the rotational motion to the screw propeller 11 through the gear transmission mechanism 16 to ensure uniform and stable propulsion force, thereby maintaining the dynamic balance between the melt flow rate and the electric field.

[0051] Beneficially, this solution integrates a high-frequency electric field with the injection molding process, adding an electric field generation module to conventional injection molding equipment. This allows for the directional arrangement of fillers without the need for additional complex devices, and is suitable for molding products of varying thicknesses. The high-frequency electric field is concentrated within the cavity 17, resulting in high energy utilization. Furthermore, the electric field parameters can be flexibly adjusted via a control device to adapt to different filler types and content requirements, achieving efficient directional arrangement of functional fillers during injection molding. This solves the problems of complex equipment, high costs, and limited product thickness associated with traditional methods. The flow and solidification of the molten material under the electric field are precisely controlled, allowing the filler orientation structure to form stably within the product. The synergistic effect of the injection unit and the high-frequency electric field reduces process complexity, improves production efficiency, and avoids damage to the orientation structure caused by secondary processing. The integrated design of the control device allows for dynamic adjustment of process parameters, enhancing the equipment's adaptability to different material systems.

[0052] According to some embodiments of this application, such as Figure 2 As shown, a nozzle 13 is provided between the material cylinder 10 and the main channel 9-1. Specifically, one end of the nozzle 13 is connected to the material cylinder 10, and the other end is connected to the main channel 9-1.

[0053] It should be noted that nozzle 13 refers to the tubular structure that connects the injection device barrel 10 and the main runner 9-1 of the mold. Specifically, it can be made of high-temperature resistant metal material, such as stainless steel or alloy steel. Its inner wall can be polished to reduce flow resistance. This structure ensures the sealing of the melt transmission path through a rigid connection to avoid heat loss.

[0054] The inlet end of nozzle 13 can be fixedly connected to the outlet end of barrel 10 via threads or flanges, and a high-temperature sealing gasket can be used to ensure airtightness at the connection. This design ensures leak-free transfer of melt from barrel 10 to nozzle 13. The outlet end of nozzle 13 can form a pressure seal with the inlet of the main runner 9-1 of the mold through a conical fit structure, specifically a self-locking conical fit. This structure ensures a smooth transition of melt to mold cavity 17, avoiding flow disturbance.

[0055] Specifically, nozzle 13 serves as a transition channel between barrel 10 and mold, and its internal flow channel cross-sectional dimensions can be optimized according to the melt viscosity. When injection drive 12 pushes screw propeller 11, the molten material forms a continuous flow within barrel 10, and the smooth surface of the inner wall of nozzle 13 reduces flow resistance. The rigid connection between nozzle 13 and barrel 10 maintains melt temperature stability and avoids heat dissipation problems caused by connection gaps. At the same time, the precise docking of nozzle 13 outlet and main channel 9-1 forms a continuous flow channel, allowing the melt to enter cavity 17 at a uniform flow rate. Under the action of a high-frequency electric field, the functional filler inside the melt achieves directional alignment while maintaining fluidity, and the stable transmission conditions provided by the nozzle 13 structure create a time window for electric field-assisted alignment.

[0056] Beneficially, this solution achieves closed-loop transport through the integrated nozzle 13 structure, effectively blocking the influence of the external environment on the melt temperature, while optimizing the flow channel geometry to eliminate local flow dead zones. Compared to direct injection without the nozzle 13 structure, this design extends the residence time of the melt in the controlled environment, providing sufficient conditions for the orientation process of the filler under the action of a high-frequency electric field. It achieves full temperature control of the molten material from the injection device to the mold cavity 17, eliminating the material cooling problem caused by traditional open transport. The reduction in flow resistance ensures the uniform advancement of the melt during the filling stage of the cavity 17, avoiding uneven filler distribution caused by pressure fluctuations. The precise docking of the nozzle 13 and the main channel 9-1 ensures that the melt smoothly enters the electric field region, providing a stable process foundation for the orderly arrangement of functional fillers.

[0057] According to some embodiments of this application, the heating assembly includes a heater 14 that covers the exterior of the material cylinder 10. Wherein, as Figure 2 As shown, multiple heaters 14 are arranged at intervals along the radial direction of the barrel 10.

[0058] The heater 14 is a device that generates heat and transfers it to the barrel 10. Specifically, it can be a resistance heater 14 or an electromagnetic induction heater 14. The heat is evenly conducted from the outer wall of the barrel 10 inwards through an external covering. The radially spaced arrangement means that multiple heaters 14 are distributed circumferentially around the barrel 10 while maintaining spacing between them. This can be achieved using a ring array or a segmented layout. The temperature regulation capability of different areas is formed by independently controlling the power of each heater 14.

[0059] Specifically, after the outer wall of the barrel 10 is covered by multiple heaters 14, heat can be evenly transferred to the internal raw material, avoiding local overheating that could lead to material decomposition or insufficient heating that could lead to incomplete melting. When the multiple heaters 14 are arranged radially at intervals, independent temperature control zones can be formed at different axial positions of the barrel 10 by adjusting the power of each heater 14. For example, the heating power can be reduced in the area near the feed inlet to prevent the raw material from melting prematurely, while the power can be increased in the area near the nozzle 13 to compensate for heat loss. This distribution method can adapt to the structure of the barrel 10 with a large length-to-diameter ratio, ensuring that the raw material maintains consistent fluidity during the melting process, thereby providing a stable melt state for the subsequent directional arrangement of high-frequency electric field-induced functional fillers.

[0060] Advantageously, compared with existing technologies, traditional injection molding equipment typically uses a single heating source or continuous heating belt, making it difficult to control the axial temperature gradient of the barrel 10 and prone to heat attenuation in the end area. This solution, however, uses multiple heaters 14 spaced apart to achieve zoned temperature control in both the radial and axial directions. For example, segmented heating compensates for heat loss at the end, while avoiding material degradation caused by localized overheating. This solves the problem of insufficient melting caused by uneven heating of the raw material within the barrel 10 during injection molding. Independent temperature control in multiple zones ensures melt uniformity, thus providing stable processing conditions for the directional arrangement of functional fillers under the action of a high-frequency electric field.

[0061] According to some embodiments of this application, a feeding assembly is also included, wherein the feeding assembly includes a feeding hopper 15, which is connected to the feed inlet.

[0062] In this application, the feeding assembly refers to a material supply system used to convey raw materials to the injection molding equipment. Specifically, it can be implemented using a combination structure of a container with storage function and a conveying pipeline, achieving continuous feeding by controlling the material flow path. The feeding hopper 15 refers to a storage device with a funnel-shaped structure, specifically implemented using a structure of a conical metal shell and a bottom discharge port, achieving directional conveying of raw materials from the storage bin to the material cylinder 10 through the principle of gravity flow.

[0063] Specifically, the outlet end of the hopper 15 forms a sealed connection with the inlet of the barrel 10, allowing the raw material to continuously enter the barrel 10 under gravity during the injection molding process. The airtightness of the material conveying channel prevents the intrusion of external dust and moisture, avoiding the raw material from becoming damp, clumping, or being mixed with impurities. The negative pressure generated by the rotation of the screw propeller 11 inside the barrel 10 assists the flow of the raw material, maintaining the uniformity of the premixed state of the polymer matrix and functional fillers before melting. This feeding method eliminates the squeezing and shearing effects on the raw material caused by traditional mechanical feeding devices, preventing the fillers from agglomerating or unevenly distributing during the conveying stage, and providing a stable initial dispersion material basis for the directional arrangement of the fillers under the subsequent high-frequency electric field.

[0064] Beneficially, this solution, through a closed gravity self-flowing feeding system, achieves physical isolation during the raw material transportation process while avoiding mechanical damage, effectively maintaining the original dispersion state of the filler in the matrix. This ensures a continuous and stable supply of raw materials during injection molding, prevents secondary agglomeration or uneven distribution of the filler during the transportation stage, and provides uniform initial material conditions for the directional arrangement of the filler under the action of a high-frequency electric field, thereby improving the anisotropic conductivity of the final product.

[0065] According to some embodiments of this application, such as Figure 2 As shown, the injection device also includes a gear transmission mechanism 16, the output end of the injection drive 12 is connected to the input end of the gear transmission mechanism 16, and one end of the screw pusher 11 is connected to the output end of the gear transmission mechanism 16.

[0066] It should be noted that the gear transmission mechanism 16 refers to a mechanical transmission device composed of two or more meshing gears, specifically a helical gear set or a planetary gear set, which transmits rotational motion and adjusts speed and torque through the meshing of the gears. The injection drive 12 refers to the drive component that generates rotational power, specifically a servo motor or a stepper motor, which adjusts power output by controlling the motor's speed and direction. Furthermore, the screw propulsion component 11 refers to the spiral conveying component located inside the barrel 10, specifically a single-threaded or double-threaded structure, which propels the molten raw material towards the main channel 9-1 through rotational motion.

[0067] Specifically, the rotational power output by the injection drive 12 is transmitted to the gear set through the input end of the gear transmission mechanism 16. After the speed and torque are adjusted by gear meshing, the output end drives the screw propeller 11 to rotate. During gear meshing transmission, the tooth surface contact area is large and the transmission ratio is constant, effectively avoiding the slippage phenomenon that exists in belt transmission and ensuring the stability of power transmission. By selecting gear combinations with different modules and numbers of teeth, the speed of the screw propeller 11 can be precisely controlled, thereby adjusting the injection pressure and propulsion speed of the molten material.

[0068] Beneficially, this solution replaces the traditional transmission method with a gear transmission mechanism 16. Utilizing the inherent characteristics of gear meshing transmission, higher torque output efficiency can be obtained under the same input power. At the same time, the adjustability of the gear transmission ratio improves the screw speed control precision, thereby enhancing the power transmission efficiency between the injection drive component 12 and the screw propulsion component 11 and reducing energy loss during power transmission. Through precise adjustment of the gear transmission ratio, the control precision of the screw propulsion speed is optimized, providing stable injection pressure conditions for the directional arrangement of functional fillers in the molten raw material.

[0069] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0070] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. An injection molding die based on the directional arrangement of functional fillers assisted by a high-frequency electric field, characterized in that, include: Dynamic model assembly (1); A fixed mold assembly (2) is disposed opposite to the moving mold assembly (1). A cavity (17) is provided between the moving mold assembly (1) and the fixed mold assembly (2). The fixed mold assembly (2) is provided with a main flow channel (9-1) and a branch flow channel. The main flow channel (9-1) and the branch flow channel are both connected to the cavity (17). The electrical connection assembly includes a first electrode (3) and a second electrode (4). The first electrode (3) is connected to one of the moving mold and the fixed mold, and the second electrode (4) is connected to the other of the moving mold assembly (1) and the fixed mold assembly (2). The first electrode (3) and the second electrode (4) are disposed on the same side of the cavity (17). A high-frequency generator (5) is disposed outside the cavity (17) and is electrically connected to the power connection assembly.

2. The injection molding die for the directional arrangement of functional fillers based on high-frequency electric field assistance according to claim 1, characterized in that, It also includes an insulating member (6), which is disposed on the same side as the fixed mold assembly (2) and / or the moving mold assembly (1), and the insulating member (6) partially surrounds the first electrode member (3) and / or the second electrode member (4).

3. The injection molding die based on high-frequency electric field-assisted directional arrangement of functional fillers according to claim 2, characterized in that, It also includes a wiring channel (7) that passes through the insulating member (6), the moving mold assembly (1) and / or the fixed mold assembly (2) in sequence, and the connecting wire of the high frequency generator (5) can be connected to the first electrode (3) and / or the second electrode (4) through the wiring channel (7).

4. The injection molding die based on high-frequency electric field-assisted directional arrangement of functional fillers according to claim 3, characterized in that, The first electrode (3) and / or the second electrode (4) are provided with terminals (8), the free end of the terminals (8) extends into the wiring channel (7), and the connecting wire of the high frequency generator (5) is connected to the terminals (8).

5. The injection molding die for the directional arrangement of functional fillers based on high-frequency electric field assistance according to claim 1, characterized in that, It also includes a sprue (9), which has a hollow structure to form the main runner (9-1), and the sprue (9) is detachably connected to the fixed mold.

6. Injection molding equipment, characterized in that, include: The injection molding die based on the directional arrangement of functional fillers assisted by a high-frequency electric field as described in any one of claims 1 to 5; The injection device includes a feeding assembly and a heating assembly. The feeding assembly includes a barrel (10), a screw propeller (11), and an injection drive (12). The barrel (10) is provided with a feed port for inputting raw materials. The screw propeller (11) is disposed inside the barrel (10). One end of the barrel (10) is connected to the main channel (9-1). The injection drive (12) is connected to the screw propeller (11) and can drive the screw propeller (11) to rotate. The heating assembly is connected to the barrel (10) and is used to heat the raw materials in the barrel (10) to melt the raw materials in the barrel (10). The control device is electrically connected to the high-frequency generator (5) and the injection device.

7. The injection molding equipment according to claim 6, characterized in that, It also includes a nozzle (13), one end of which is connected to the barrel (10) and the other end is connected to the main channel (9-1).

8. The injection molding equipment according to claim 6, characterized in that, The heating assembly includes a heater (14) that covers the outside of the barrel (10), and a plurality of heaters (14) are arranged at intervals along the radial direction of the barrel (10).

9. The injection molding equipment according to claim 6, characterized in that, It also includes a feeding assembly, which includes a feeding hopper (15) connected to the feed inlet.

10. The injection molding equipment according to claim 6, characterized in that, The injection device further includes a gear transmission mechanism (16), the output end of the injection drive (12) is connected to the input end of the gear transmission mechanism (16), and one end of the screw pusher (11) is connected to the output end of the gear transmission mechanism (16).

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