Extrusion die capable of quickly adjusting die lip gap and method for manufacturing hollow plate

Abstract

The application discloses an extrusion die capable of quickly adjusting the gap between die lips and a hollow plate manufacturing method. The extrusion die comprises a die body, two die lips and a die lip adjusting mechanism. The die lip adjusting mechanism comprises two die port adjusting blocks mounted on the die body, two groups of fine adjustment mechanisms respectively mounted on the two die port adjusting blocks, and two fast adjustment mechanisms for adjusting the positions of the die port adjusting blocks relative to the die body. The fine adjustment mechanisms are respectively connected to different positions of the corresponding die lips. The overall adjustment of the distance between the two die lips can be realized by operating the fast adjustment mechanisms, and the local adjustment of the distance between the die lips can be realized by operating the fine adjustment mechanisms. The application adopts the "fast adjustment + fine adjustment" mode, separates the overall adjustment from the local correction, solves the problems of long time consumption and high skill requirement for the operator in the traditional die adjustment, can quickly realize the overall adjustment of the distance between the die lips, simultaneously accurately corrects the local wall thickness, and significantly improves the adjustment efficiency and product precision.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of material extrusion molding and manufacturing, in particular to an extrusion die capable of quickly adjusting the gap between die lips and a hollow plate manufacturing method. BACKGROUND

[0002] Hollow plates are widely used in packaging, construction, advertising and other industries due to their light weight, sound insulation, heat insulation and other advantages. As the core equipment on the hollow plate production line, the performance of the extrusion die directly affects the product quality and production efficiency. With the continuous development of related industries, higher requirements are put forward for the quality and production efficiency of hollow plates, which also prompts the need for continuous innovation and improvement of extrusion die technology. In the field of high polymer material processing technology, the performance improvement of the extrusion die is of great significance to the development of the entire industry, as it relates to whether the product can better meet market demand and whether the enterprise can occupy an advantage in the fierce competition.

[0003] In traditional hollow plate production, in order to ensure the uniformity of the wall thickness of the hollow plate, the gap of the die lip (i.e. the die lip) needs to be accurately adjusted. Traditional dies usually have multiple independent adjustment screws in the width direction. When the product thickness needs to be adjusted, the operator must adjust these screws one by one and repeatedly. In addition, traditional hollow plates are usually extruded from a single homogeneous material, and if the performance is to be improved, methods such as increasing the thickness of the rib plate or replacing more expensive overall raw materials are usually used.

[0004] The traditional die has low adjustment efficiency. When adjusting the product thickness, the operator needs to adjust numerous independent screws one by one and repeatedly, which takes a long time and seriously affects production efficiency. In addition, it requires a high level of experience and skill from the operator, increasing labor costs and management difficulty. At the same time, traditional hollow plates are extruded from a single homogeneous material, and the mechanical properties of the rib plate are limited, making it difficult to meet the performance requirements of higher performance applications. Increasing the thickness of the rib plate or replacing more expensive overall raw materials will significantly increase the weight and cost of the product, weakening the original lightweight and economic advantages of the hollow plate. SUMMARY

[0005] In order to solve the technical problems in the prior art, the present application provides an extrusion die capable of quickly adjusting the gap between die lips and a hollow plate manufacturing method.

[0006] The extrusion die capable of quickly adjusting the gap between die lips and the hollow plate manufacturing method provided by the present application adopt the following technical solutions:

[0007] An extrusion die capable of quickly adjusting the gap between die lips and a hollow plate manufacturing method, comprising:

[0008] a die body, the die body being provided with a flow channel inside for the flow of a first molten material;

[0009] Two die lips, which are disposed opposite to each other at the end of the flow channel;

[0010] A die lip adjustment mechanism, comprising two die opening adjustment blocks, the two die opening adjustment blocks being respectively mounted on the die body;

[0011] Two sets of fine-tuning mechanisms, each set of which includes several fine-tuning components installed on the corresponding die opening adjustment block, and the fine-tuning components are respectively connected to different positions of the corresponding die lip;

[0012] Two quick-adjustment mechanisms are provided, each used to adjust the position of the corresponding mold opening adjustment block relative to the mold body.

[0013] The quick-adjustment mechanism allows for overall adjustment of the distance between the two die lips, while the fine-adjustment mechanism allows for local adjustment of the distance between the two die lips.

[0014] In some embodiments, the mold body includes a main mold body, two front mold bodies, and a mold core disposed between the two front mold bodies. The flow channel is formed by the gap between the front mold bodies and the mold core. Both the front mold bodies and the mold core are fixed to the main mold body. The main mold body has a first feed hole communicating with the flow channel. The extrusion die further includes a flow rate adjustment mechanism, which includes:

[0015] At least one flow-blocking block is installed in a notch opened in the flow channel of the front mold body;

[0016] At least one flow-blocking screw is provided, which is used to adjust the depth of the flow-blocking block in the flow channel to regulate the flow rate of the material.

[0017] In some embodiments, the die lip is provided with a first screw hole; the die opening adjusting block is provided with a first rotating hole;

[0018] The fine-tuning component includes a fine-tuning screw, which is rotatably disposed in the first rotating hole. The fine-tuning screw has first limiting protrusions that abut against both sides of the die opening adjusting block. The fine-tuning screw is threadedly rotatably connected to the first screw hole.

[0019] In some embodiments, the die opening adjustment block is further provided with several sets of through holes and fixing screw holes. The quick-adjustment mechanism includes several sets of quick-adjustment components. Each set of quick-adjustment components includes a guide screw, a locking nut, and a clamping screw. One end of the guide screw is fixed to the front mold body. The guide screw is inserted into the through hole. The locking nut is threaded onto the guide screw and abuts against the outer side of the die opening adjustment block. The clamping screw is threaded and rotatably connected to the fixing screw hole. One end of the clamping screw abuts against the front mold body, so that the push-pull adjustment of the die opening adjustment block can be achieved by coordinating the adjustment of the locking nut and the clamping screw.

[0020] In some embodiments, the flow-blocking block is provided with a second screw hole; the front mold body is provided with a second rotating hole;

[0021] The flow-blocking screw is rotatably disposed in the second rotating hole, and the flow-blocking screw has second limiting protrusions that abut against both sides of the front mold body. The flow-blocking screw is threadedly rotatably connected to the second screw hole.

[0022] In some embodiments, the end of the mold core is provided with a plurality of equally spaced partition blocks, and the gaps between the partition blocks are used for forming the hollow plate.

[0023] In some embodiments, an additive channel is formed inside the mold core, and a second feed hole communicating with the additive channel is provided on the main mold body for injecting a second molten material containing conductive fibers into it during the forming of the rib plate, so that the second molten material containing conductive fibers is mixed with the first molten material in the gap between the partition blocks, and an injection hole communicating with the additive channel is provided on the side wall of the partition block.

[0024] The extrusion die also includes a magnetic field generator integrated within the die lip, which is configured to generate an alternating magnetic field in the region of the gap between the separator blocks for induction heating of the conductive fibers in the second molten material.

[0025] In some embodiments, the magnetic field generator is configured to generate a high-frequency alternating magnetic field to heat the conductive fiber by induction heating, thereby promoting the mixing of the first molten material and the second molten material.

[0026] In some embodiments, the magnetic field generator includes a high-frequency induction coil disposed within the mold lip.

[0027] The present invention also provides a method for manufacturing a hollow board, comprising:

[0028] Provides an extrusion die with a rapidly adjustable die lip gap as described in any one of the claims;

[0029] The first molten material is fed into the flow channel through the first feed hole to form the upper and lower skins and stiffeners of the hollow plate;

[0030] While the first molten material flows through the gap between the partition blocks to form the rib plate, a second molten material containing conductive fibers is fed into the additive channel through the second feed hole and injected into the rib plate being formed through the injection hole, and mixed with the first molten material therein to form a composite rib plate;

[0031] Furthermore, while the second molten material is being injected, the magnetic field generator is activated to generate a high-frequency alternating magnetic field, which heats the conductive fiber through induction heating to promote the mixing of the first molten material and the second molten material.

[0032] In summary, this application includes at least one of the following beneficial technical effects:

[0033] 1. This extrusion die utilizes a unique die lip adjustment mechanism, employing a "quick adjustment + fine adjustment" approach, significantly improving the efficiency and precision of die lip spacing adjustment. The quick adjustment mechanism enables rapid overall adjustment of the die lip spacing, reducing overall adjustment time, while the fine adjustment mechanism allows for precise correction of local wall thickness, ensuring product quality. Simultaneously, the inclusion of flow-blocking blocks and flow-blocking screws further optimizes the uniformity of material flow within the runner, enhancing product quality stability. Compared to traditional dies, this design significantly improves production efficiency and reduces the requirements for operator experience and skill.

[0034] 2. Based on the existing mold, the function of manufacturing high-performance hollow boards has been added. By setting additive channels and injection holes within the mold core, the performance of the ribs can be enhanced in situ during extrusion, avoiding the problems of increased product weight and cost associated with traditional methods. Simultaneously, high-frequency induction heating technology integrated into the mold lip provides precise and instantaneous heating of the conductive fibers inside the ribs, effectively promoting the fusion between different materials, ensuring the structural integrity and mechanical properties of the composite ribs, and improving the overall performance of the hollow board to meet higher performance requirements in application scenarios. Compared with traditional performance enhancement methods that increase product weight and cost, this solution is more advantageous. Attached Figure Description

[0035] Figure 1 This is a schematic diagram of the structure of the extrusion die provided in Embodiment 1 of this application;

[0036] Figure 2 yes Figure 1 A magnified structural diagram of part A in the middle;

[0037] Figure 3 yes Figure 1 Top view of the extrusion die shown;

[0038] Figure 4 It is along Figure 3 Schematic diagram of the cross-sectional structure of the middle BB line;

[0039] Figure 5 It is along Figure 3 Schematic diagram of the cross-sectional structure of the middle CC line;

[0040] Figure 6 yes Figure 5 A magnified structural diagram of section D;

[0041] Figure 7 This is a top view of an extrusion die provided in another embodiment of this application;

[0042] Figure 8 It is along Figure 7 Schematic diagram of the cross-sectional structure of the EE line;

[0043] Figure 9 yes Figure 8 A magnified structural diagram of section G in the middle;

[0044] Figure 10 It is along Figure 7 Schematic diagram of the cross-sectional structure of the middle FF line;

[0045] Figure 11 yes Figure 10 A magnified structural diagram of section H in the middle.

[0046] Explanation of reference numerals in the attached drawings: 1. Mold body; 11. Main mold body; 111. First feed hole; 112. Second feed hole; 12. Front mold body; 13. Mold core; 131. Separator block; 132. Additive channel; 133. Injection hole; 14. Flow channel; 2. Mold lip; 21. First screw hole; 3. Mold lip adjustment mechanism; 31. Mold opening adjustment block; 32. Fine adjustment mechanism; 321. Fine adjustment screw; 322. First limit protrusion; 33. Quick adjustment mechanism; 331. Guide screw; 332. Locking nut; 333. Clamping screw; 4. Flow rate adjustment mechanism; 41. Flow blocking block; 42. Flow blocking screw; 421. Second limit protrusion; 5. Magnetic field generator; 51. High-frequency induction coil. Detailed Implementation

[0047] The technical solutions in the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings. The described embodiments are only possible technical implementations of the present invention, but are not limited thereto. Other embodiments obtained by those skilled in the art in conjunction with the embodiments of the present invention without creative effort are also within the protection scope of the present invention.

[0048] This application mainly adopts "quick adjustment + fine adjustment" to adjust the die lip spacing and in-situ reinforce the stiffener, which achieves the effect of improving the die adjustment efficiency and improving the performance of the hollow plate stiffener. The following is a further detailed description of this application.

[0049] Example 1

[0050] Please refer to Figures 1-6 The extrusion die with rapidly adjustable die lip gap provided in this application includes a die body 1, two die lips 2, and a die lip adjustment mechanism 3. The die lip adjustment mechanism 3 includes two sets of fine-tuning mechanisms 32 and two quick-adjustment mechanisms 33. The two die lips 2 are positioned opposite each other at the ends of the flow channels 14 inside the die body 1. Two die opening adjustment blocks 31 are respectively mounted on the die body 1. The fine-tuning components of the two sets of fine-tuning mechanisms 32 are respectively mounted on the corresponding die opening adjustment blocks 31 and connected to different positions of the corresponding die lips 2. The two quick-adjustment mechanisms 33 are used to adjust the position of the corresponding die opening adjustment blocks 31 relative to the die body 1. By operating the quick-adjustment mechanism 33, the overall distance between the two die lips 2 can be adjusted; by operating the fine-tuning mechanism 32, the local distance between the two die lips 2 can be adjusted, achieving a balance between the efficiency and accuracy of die lip 2 distance adjustment. This is because the quick-adjustment mechanism 33 can quickly change the overall distance of the die lips 2, while the fine-tuning mechanism 32 can make precise corrections for local areas.

[0051] For details, please refer to Figure 4 The mold body 1 includes a main mold body 11, two front mold bodies 12, and a mold core 13 disposed between the two front mold bodies 12. The main mold body 11 serves as the support base for the entire mold, supporting and fixing other components. The front mold bodies 12 and the mold core 13 are both fixed to the main mold body 11, and the gap between them forms a flow channel 14 for the first molten material to flow through. The main mold body 11 has a first feed hole 111 communicating with the flow channel 14, through which the first molten material enters the flow channel 14.

[0052] Please refer to Figure 4 The die lip 2 has a first screw hole 21, and the die opening adjustment block 31 has a first rotating hole. The fine-tuning component includes a fine-tuning screw 321, which is rotatably positioned in the first rotating hole. The fine-tuning screw 321 has first limiting protrusions 322 that abut against both sides of the die opening adjustment block 31. These first limiting protrusions 322 can be a retaining ring or a shoulder, and their function is to prevent the fine-tuning screw 321 from moving axially. The fine-tuning screw 321 engages with the first screw hole 21 through its thread, and its rotational motion is converted into axial translational motion relative to the die lip 2, thereby achieving push-pull adjustment of the local position of the die lip 2.

[0053] When making fine adjustments to the mold, the operator can selectively rotate one or more fine-tuning screws 321. Since the axial position of the fine-tuning screw 321 is limited by the first limiting protrusion 322, its rotational motion is converted into relative axial motion with the mold lip 2, thereby precisely pushing or pulling the local position of the mold lip 2. This design can accurately correct local wall thickness deviations caused by factors such as material flow differences, thus ensuring a high degree of thickness uniformity in the entire width direction of the final product and guaranteeing product quality.

[0054] Please refer to Figure 2 and Figure 4 To achieve rapid overall adjustment, the die opening adjustment block 31 is also provided with several sets of through holes and fixing screw holes. The quick-adjustment mechanism 33 includes several sets of quick-adjustment components. Each set of quick-adjustment components includes a guide screw 331, a locking nut 332, and a clamping screw 333. First, let's introduce their structural relationship: one end of the guide screw 331 is fixed to the front mold body 12 and passes through the through hole on the die opening adjustment block 31, serving as a guide; the clamping screw 333 is threaded into the fixing screw hole of the die opening adjustment block 31, and its end abuts against the front mold body 12, used to push the die opening adjustment block 31 outward; the locking nut 332 is threaded onto the guide screw 331 and abuts against the outer side of the die opening adjustment block 31, used to pull the die opening adjustment block 31 inward.

[0055] When the overall thickness of the hollow plate needs to be changed (i.e., the overall spacing of the mold lip 2 needs to be adjusted), the operator only needs to operate a small number of quick-adjustment components simultaneously. For example, to increase the spacing, the locking nut 332 can be slightly loosened first, and then the clamping screw 333 can be tightened to push the mold opening adjustment block 31 outward; conversely, to decrease the spacing, the clamping screw 333 can be loosened first, and then the locking nut 332 can be tightened to pull the mold opening adjustment block 31 inward. The technical advantage of this design is that it shortens the traditional time-consuming process of adjusting the overall thickness of the mold to within a few minutes, greatly improving the efficiency of production changeover and start-up debugging, significantly increasing production efficiency, and reducing the requirements for operator experience and proficiency. The guide screw 331 and clamping screw 333 can be made of high-quality carbon steel, which has good strength and toughness after heat treatment.

[0056] When the overall thickness of the hollow plate needs to be changed, the operator only needs to operate a small number of quick-adjustment components simultaneously. By tightening the locking nut 332 or the clamping screw 333, the two mold opening adjustment blocks 31 can be moved horizontally as a whole, thereby driving the entire mold lip 2 to move quickly and synchronously to the target position. The technical advantage of this design is that it shortens the traditional time-consuming process of adjusting the overall thickness of the mold to within a few minutes, greatly improving the efficiency of production changeover and start-up debugging, significantly increasing production efficiency, and reducing the requirements for operator experience and proficiency.

[0057] Please refer to Figure 4 The extrusion die also includes a flow rate adjustment mechanism 4, which includes at least one flow-blocking block 41 and at least one flow-blocking screw 42. The flow-blocking block 41 is installed in a notch opened in the flow channel 14 of the front die body 12. The flow-blocking screw 42 is used to adjust the depth of the flow-blocking block 41 in the flow channel 14 to adjust the flow rate of the material. A second screw hole is opened on the flow-blocking block 41, and a second rotating hole is opened on the front die body 12. The flow-blocking screw 42 is rotatably disposed in the second rotating hole, and has second limiting protrusions 421 formed thereon that abut against both sides of the front die body 12 to prevent its axial movement. The flow-blocking screw 42 is threadedly rotatably connected in the second screw hole, and its rotational motion can be converted into the translational motion of the flow-blocking block 41 to adjust its depth into the flow channel.

[0058] During production, if uneven flow of extruded material is observed in the width direction, the operator can rotate the corresponding flow-blocking screw 42 to adjust the depth of the flow-blocking block 41 extending into the flow channel 14. The technical advantage of this design is that by changing the cross-sectional area of ​​the local flow channel 14, it can actively intervene and balance the material flow velocity across the entire width direction, ensuring that the material reaches the die lip 2 outlet uniformly. This optimizes the uniformity of material flow within the flow channel 14 from the source, improving the stability of product quality.

[0059] In addition, please refer to Figure 5 and Figure 6 The mold core 13 has several equally spaced partition blocks 131 at its end, and the gaps between the partition blocks 131 are used for forming the hollow plate.

[0060] The implementation principle of this embodiment is as follows: This extrusion die, through a unique die lip adjustment mechanism 3, employs a "fast adjustment + fine adjustment" method, which greatly improves the efficiency and accuracy of die lip 2 spacing adjustment. The fast adjustment mechanism 33 can quickly achieve overall adjustment of the die lip 2 spacing, reducing the overall adjustment time, while the fine adjustment mechanism 32 can precisely correct local wall thickness, ensuring product quality. Simultaneously, the inclusion of the flow-blocking block 41 and the flow-blocking screw 42 further optimizes the uniformity of material flow within the flow channel 14, improving product quality stability. Compared to traditional dies, this design significantly improves production efficiency and reduces the requirements for operator experience and skill.

[0061] Example 2

[0062] Please refer to Figures 7-11The difference between this embodiment and the previous embodiment is that, in order to manufacture a high-performance hollow board, an additive channel 132 is formed inside the mold core 13, and a second feed hole 112 communicating with the additive channel 132 is provided on the main mold body 11. This channel is used to inject a second molten material containing conductive fibers (such as carbon fiber) into it during the forming of the rib plate, so that the second molten material is mixed with the first molten material in the gap between the separator blocks 131. An injection hole 133 communicating with the additive channel 132 is provided on the side wall of the separator blocks 131. The extrusion mold also includes a magnetic field generator 5 integrated in the die lip 2, which is configured to generate a high-frequency alternating magnetic field in the gap region of the separator blocks 131 for induction heating of the aforementioned conductive fibers.

[0063] For details, please refer to Figure 10 and Figure 11 The separator 131 acts as a partition, dividing the flow channel 14 into multiple regions, allowing the ribs to be formed within these gaps. The additive channel 132 is an independent channel designed inside the mold core 13, forming an internal channel for conveying the second molten material, transporting the material from the second feed hole 112 to the injection hole 133 on the side wall of the separator 131. By selectively enhancing the strength of the ribs, the compressive strength of the hollow plate can be increased. Furthermore, compared to increasing the overall thickness of the ribs or replacing them with more expensive raw materials, this solution is expected to improve performance while better controlling product weight and production costs.

[0064] Please refer to Figure 8 and Figure 9 The magnetic field generator 5 is configured to generate a high-frequency alternating magnetic field to heat the conductive fibers through induction heating, thereby promoting the mixing of the first molten material and the second molten material. The magnetic field generator 5 includes a high-frequency induction coil 51 disposed within the mold lip 2. When the second molten material containing conductive fibers is injected into the forming rib, the high-frequency induction coil 51 is activated. The generated high-frequency alternating magnetic field causes the conductive fibers inside the rib to heat up instantaneously, thereby promoting the mixing and fusion of the first and second molten materials at the interface, forming a dense and firmly bonded high-performance composite rib. For example, the high-frequency induction coil 51 can be made of high-purity copper wire to ensure good conductivity and electromagnetic properties.

[0065] During the extrusion process, as the first molten material flows through the separator block 131 to form the rib shell, a second molten material containing carbon fibers is simultaneously injected into the center of the rib. Immediately afterwards, the high-frequency induction coil 51 inside the die lip 2 is energized, and the resulting alternating magnetic field causes the carbon fibers inside the rib to heat up inductively.

[0066] The implementation principle of this embodiment is as follows: This design adds the function of manufacturing high-performance hollow boards to the original mold. By setting additive channels 132 and injection holes 133 in the mold core 13, the performance of the ribs can be enhanced in situ during extrusion, avoiding the problems of increased product weight and cost caused by traditional methods. At the same time, by using high-frequency induction heating technology integrated in the mold lip 2, the conductive fibers inside the ribs are precisely and instantaneously heated, effectively promoting the fusion between different materials, ensuring the structural integrity and mechanical properties of the composite ribs, improving the overall performance of the hollow board, and meeting the application scenarios with higher performance requirements.

[0067] Example 3

[0068] Please refer to Figures 7-11 The method for manufacturing a hollow board provided in this application includes the following steps:

[0069] S1, providing the extrusion die with adjustable die lip gap as described in Example 2. First, ensure that all components of the die are installed correctly and operating normally, and check whether the die body 1, die lip 2, die lip adjustment mechanism 3, additive channel 132, magnetic field generator 5, etc. are intact, whether the connections are tight, and whether the electrical system is normal.

[0070] S2, the first molten material is fed into the flow channel 14 through the first feed hole 111 to form the upper and lower skins and ribs of the hollow plate. The main extruder is started, allowing the first molten material to enter the flow channel 14 through the first feed hole 111 on the main die body 11. The first molten material flows within the flow channel 14, passing through the gap between the front die body 12 and the die core 13, gradually forming the basic shape of the hollow plate, including the initial shape of the upper and lower skins and ribs. During this process, parameters such as the temperature, flow rate, and pressure of the first molten material must be carefully controlled to ensure the quality of the molding. For example, the material flow rate is controlled by adjusting the screw speed of the extruder, and a heating device is used to maintain a suitable material temperature.

[0071] S3, while the first molten material flows through the gaps between the separator blocks 131 to form the rib, a second molten material containing conductive fibers is fed into the additive channel 132 through the second feed hole 112, and injected into the rib position through the injection hole 133 to mix with the first molten material at the rib position to form a composite rib. The auxiliary extruder is started, and the second molten material containing conductive fibers is conveyed from the second feed hole 112 to the additive channel 132. The second molten material flows along the additive channel 132 and is finally precisely injected into the rib being formed through the injection hole 133 on the side wall of the separator block 131. During this process, the injection volume and injection speed of the second molten material must be precisely controlled to ensure thorough mixing with the first molten material. For example, the injection volume can be controlled by adjusting the flow regulating valve of the feeding device.

[0072] S4. Simultaneously with the injection of the second molten material, the magnetic field generator 5 is activated to generate a high-frequency alternating magnetic field. This field heats the conductive fibers through induction heating, promoting the mixing of the first and second molten materials. Once the second molten material is injected into the rib plate, the high-frequency induction coil 51 within the die lip 2 is immediately activated to generate the high-frequency alternating magnetic field. This magnetic field causes the conductive fibers inside the rib plate to heat up instantaneously, thereby promoting the mixing and fusion of the first and second molten materials at the interface, forming a high-performance composite rib plate. During this process, the parameters of the high-frequency induction coil 51, such as frequency and power, must be adjusted according to the actual situation to achieve the optimal heating and mixing effect.

[0073] The implementation principle of this embodiment is as follows: The complex composite material preparation process and extrusion molding process are highly integrated into one unit. By coordinating the extrusion of the first molten material, the injection of the second molten material, and the application of a high-frequency alternating magnetic field, integrated and online manufacturing of high-performance hollow boards is achieved. This method simplifies the production process, is expected to improve production efficiency and reduce costs, while simultaneously enhancing the performance of the hollow boards.

[0074] The specific embodiments described above do not constitute a limitation on the scope of protection of this application. Any other corresponding changes and modifications made based on the technical concept of this application should be included within the scope of protection of this application.

Claims

1. An extrusion die with adjustable die lip clearance, characterized in that, include: The mold body (1) has a flow channel (14) inside for the flow of the first molten material. The mold body (1) includes a main mold body (11), two front mold bodies (12), and a mold core (13) disposed between the two front mold bodies (12). The end of the mold core (13) is provided with a plurality of equally spaced partition blocks (131). The gaps between the partition blocks (131) are used to form the ribs of the hollow plate. An additive channel (132) is formed inside the mold core (13). The main mold body (11) is provided with a second feed hole (112) communicating with the additive channel (132) for injecting a second molten material containing conductive fibers into it when the ribs are formed, so that the second molten material containing conductive fibers is mixed with the first molten material in the gaps between the partition blocks (131). The side wall of the partition block (131) is provided with an injection hole (133) communicating with the additive channel (132). Two mold lips (2) are disposed opposite each other at the end of the flow channel (14); The mold lip adjustment mechanism (3) includes two mold opening adjustment blocks (31), which are respectively installed on the mold body (1); Two sets of fine-tuning mechanisms (32), each set of fine-tuning mechanisms (32) includes a plurality of fine-tuning components installed on the corresponding mold opening adjustment block (31), and the fine-tuning components are respectively connected to different positions of the corresponding mold lip (2); Two quick-adjustment mechanisms (33) are provided, each used to adjust the position of the corresponding mold opening adjustment block (31) relative to the mold body (1); The distance between the two mold lips (2) can be adjusted as a whole by operating the quick-adjustment mechanism (33), and the distance between the two mold lips (2) can be adjusted locally by operating the fine-adjustment mechanism (32). The extrusion die also includes a magnetic field generator (5) integrated within the die lip (2), which is configured to generate an alternating magnetic field in the region of the gap in the separator (131) for induction heating of the conductive fibers in the second molten material.

2. The extrusion die with rapidly adjustable die lip clearance according to claim 1, characterized in that, The flow channel (14) is formed by the gap between the front mold body (12) and the mold core (13). The front mold body (12) and the mold core (13) are both fixed to the main mold body (11). The main mold body (11) has a first feed hole (111) communicating with the flow channel (14). The extrusion die also includes a flow rate adjustment mechanism (4), which includes: At least one flow-blocking block (41) is installed in a notch opened in the flow channel (14) of the front mold body (12); At least one flow-blocking screw (42) is provided for adjusting the depth of the flow-blocking block (41) within the flow channel (14) to regulate the flow rate of the material.

3. The extrusion die with rapidly adjustable die lip clearance according to claim 2, characterized in that, The die lip (2) is provided with a first screw hole (21); the die opening adjusting block (31) is provided with a first rotating hole; The fine-tuning component includes a fine-tuning screw (321), which is rotatably disposed in the first rotating hole. The fine-tuning screw (321) has first limiting protrusions (322) that abut against both sides of the die adjustment block (31). The fine-tuning screw (321) is threadedly rotatably connected to the first screw hole (21).

4. The extrusion die with rapidly adjustable die lip clearance according to claim 2, characterized in that, The die opening adjustment block (31) is also provided with several sets of through holes and fixing screw holes. The quick adjustment mechanism (33) includes several sets of quick adjustment components. Each set of quick adjustment components includes a guide screw (331), a locking nut (332) and a clamping screw (333). One end of the guide screw (331) is fixed to the front die body (12). The guide screw (331) is inserted into the through hole. The locking nut (332) is threaded onto the guide screw (331) and abuts against the outer side of the die opening adjustment block (31). The clamping screw (333) is threaded and rotatably connected to the fixing screw hole. One end of the screw abuts against the front die body (12). The die opening adjustment block (31) can be pushed and pulled by coordinating the adjustment of the locking nut (332) and the clamping screw (333).

5. The extrusion die with rapidly adjustable die lip clearance according to claim 2, characterized in that, The flow-blocking block (41) has a second screw hole; the front mold body (12) has a second rotating hole; The flow-blocking screw (42) is rotatably disposed in the second rotating hole. The flow-blocking screw (42) has second limiting protrusions (421) that abut against both sides of the front mold body (12). The flow-blocking screw (42) is threadedly rotatably connected to the second screw hole.

6. The extrusion die with rapidly adjustable die lip clearance according to claim 1, characterized in that, The magnetic field generator (5) is configured to generate a high-frequency alternating magnetic field to heat the conductive fiber by induction heating, thereby promoting the mixing of the first molten material and the second molten material.

7. The extrusion die with rapidly adjustable die lip clearance according to claim 6, characterized in that, The magnetic field generator (5) includes a high-frequency induction coil (51) disposed within the mold lip (2).

8. A method for manufacturing a hollow board, characterized in that, include: An extrusion die with a rapidly adjustable die lip gap as described in any one of claims 2 to 5 is provided; The first molten material is fed into the flow channel (14) through the first feed hole (111) to form the upper and lower skins and stiffeners of the hollow plate; While the first molten material flows through the gap between the partition blocks (131) to form the rib plate, a second molten material containing conductive fibers is fed into the additive channel (132) through the second feed hole (112) and injected into the rib plate being formed through the injection hole (133), and mixed with the first molten material therein to form a composite rib plate; Furthermore, while the second molten material is being injected, the magnetic field generator (5) is activated to generate a high-frequency alternating magnetic field, which heats the conductive fiber by induction heating to promote the mixing of the first molten material and the second molten material.

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