An inductive hot-pressing precision powder filling machine and its powder filling method

Abstract

The present invention discloses an inductance hot-pressing precision powder filling machine and its powder filling method. Among them, the inductance hot-pressing precision powder filling machine includes a frame, a cold pressing mechanism, a cold pressing die core, and a powder feeding mechanism. The cold pressing mechanism is connected to the frame. The cold pressing mechanism includes an upper stamping structure and a lower stamping structure that are vertically arranged opposite to each other, and there is a pressing space between the upper stamping structure and the lower stamping structure. The cold pressing die core is arranged in the pressing space. The cold pressing die core includes a prefabricated block master mold. The upper stamping structure is located above the prefabricated block master mold, and the lower stamping structure is located below the prefabricated block master mold. A hot pressing template is slidably connected to the prefabricated block master mold. The powder feeding mechanism is connected to one side of the cold pressing die core and is used to fill powder into the prefabricated block master mold. The technical solution of the present invention aims to improve the uniformity of powder filling, reduce powder residue, and effectively control the powder filling amount.

Description

Technical Field

[0001] The present invention relates to the technical field of powder filling machines, and particularly to an inductive hot-pressing precision powder filling machine and a powder filling method thereof. Background Art

[0002] In the process of inductance production, powder filling is an important process in the hot-pressing encapsulation stage. Especially when filling hot-pressing powder, the precise filling of the powder plays a crucial role in the performance and quality of the final product. The powder filling process in inductance production requires the powder to be evenly distributed in multiple cavities of the mold to ensure that the products after hot-pressing encapsulation have consistent physical properties. In particular, the precise control of the powder filling amount directly affects the performance and stability of the inductance.

[0003] Currently, the commonly used powder filling equipment in the inductance production process is a fixed-volume powder filling machine. This equipment generally includes a powder box, a powder filling plate, an upper cover of the powder filling plate, a lower cover of the powder filling plate, and a set of positioning and lifting mechanisms for the hot-pressing middle template. Its basic working principle is that the powder in the powder box enters the cavities of the middle template of the mold through the holes on the powder filling plate under the action of gravity and vibration. The action sequence of the powder filling process is as follows: the holes on the powder filling plate are aligned with the conical holes of the upper cover of the powder filling plate, and the powder passes through these holes into the mold, and the powder is filled by means of vibration, gravity, and the lifting of the mold.

[0004] Although the existing fixed-volume powder filling machines can complete the powder filling task to a certain extent, there are some obvious disadvantages, resulting in their inability to meet the higher requirements for powder filling accuracy and consistency in modern inductance production:

[0005] Uneven powder filling: The existing powder filling equipment relies on the gravity flow and vibration of the powder material. The fluidity of the powder is greatly affected by the characteristics of the powder material (such as particle size, humidity, electrostatic adsorption, etc.), resulting in uneven powder filling amounts between different mold cavities. In a multi-cavity mold, the powder often shows uneven density during flow due to physical property differences, making it difficult to ensure the consistency of the powder in each cavity, thus affecting the accuracy of hot-pressing encapsulation.

[0006] Powder residue problem: The hole walls in the existing equipment are prone to adsorb the powder. It may be due to factors such as static electricity, the hot-melt adhesive component of the powder material, the roughness of the hole walls, and the excitation of the equipment that cause the powder to remain on the hole walls, resulting in incomplete powder filling. The remaining powder not only affects the accuracy of the powder filling amount but also contaminates the product in subsequent processes.

[0007] Difficulty in adjusting the powder filling amount: The powder filling amount of traditional powder filling equipment is determined by the volume of the holes on the powder filling plate. Once the production process requires adjusting the powder filling amount, it is necessary to disassemble and replace the powder filling plate and related accessories. This not only increases the production downtime but also reduces the flexibility and adaptability of the equipment. Summary of the Invention

[0008] The main object of the present invention is to provide an inductive hot-pressing precision powder filling machine and its powder filling method, aiming to improve the uniformity of powder filling, reduce powder residue, and effectively control the powder filling amount.

[0009] To achieve the above object, the inductive hot-pressing precision powder filling machine proposed by the present invention includes:

[0010] A frame;

[0011] A cold pressing mechanism, the cold pressing mechanism is connected to the frame, the cold pressing mechanism includes an upper stamping structure and a lower stamping structure arranged vertically opposite to each other, and there is a pressing space between the upper stamping structure and the lower stamping structure;

[0012] A cold pressing die core, the cold pressing die core is arranged in the pressing space, the cold pressing die core includes a prefabricated block master mold, the upper stamping structure is located above the prefabricated block master mold, the lower stamping structure is located below the prefabricated block master mold, and a hot pressing template is slidably connected to the prefabricated block master mold;

[0013] A powder feeding mechanism, the powder feeding mechanism is connected to one side of the cold pressing die core and is used to fill powder into the prefabricated block master mold.

[0014] In a possible implementation manner, the upper stamping structure includes an upper driving member and an upper punch connected to the upper driving member, the lower stamping structure includes two lower driving members and two lower punches respectively connected to the two driving members, the upper punch is located above the prefabricated block master mold and is used to push or apply pressure to the prefabricated block master mold, and the lower punch is located below the prefabricated block master mold and is used to support or apply pressure to the prefabricated block master mold.

[0015] In a possible implementation manner, the cold pressing die core further includes:

[0016] A mounting plate, a first positioning track is arranged above the mounting plate, the prefabricated block master mold is slidably connected in the first positioning track, a second positioning track is arranged below the mounting plate, and the hot pressing template is slidably connected in the second positioning track;

[0017] A switching cylinder, the switching cylinder is connected to the mounting plate and is drivingly connected to the prefabricated block master mold.

[0018] In a possible implementation manner, a plurality of limiting holes are further opened at the bottom of the mounting plate for the lower punches to pass through.

[0019] In a possible implementation manner, the prefabricated block master mold has a plurality of forming holes, and the upper and lower ends of the forming holes are circular structures with different sizes and are connected by an inclined surface or a curved surface.

[0020] In a possible implementation manner, the powder feeding mechanism includes:

[0021] A powder feeding motor module, the powder feeding motor module being connected to the frame;

[0022] A powder cartridge, the powder cartridge being drivingly connected to the powder feeding motor module, the powder cartridge being used for accommodating powder materials;

[0023] A vibrator, the vibrator abutting against the outer wall of the powder cartridge, being used for causing the powder materials in the powder cartridge to fall onto the preform matrix.

[0024] To achieve the above object, the present invention further provides a powder filling method for an inductive hot pressing precision powder filling machine, which is applied to the inductive hot pressing precision powder filling machine described in any one of the above possible embodiments, and includes the following steps:

[0025] The powder feeding mechanism conveys the powder materials in the powder cartridge to the preform matrix through the cooperation of the vibration of the vibrator and the gravity of the powder materials;

[0026] The lower punch and the preform matrix cooperate, and the powder materials are uniformly filled into the forming holes by using gravity and vibration;

[0027] The upper punch presses down, and cooperates with the lower punch to compact and form the powder materials;

[0028] The upper punch is lifted, the lower punch retracts, and the switching cylinder drives the preform matrix to move backward to seal the preform;

[0029] The hot pressing template enters the second positioning track, the switching cylinder resets, and the upper punch presses down to push the preform into the hot pressing template;

[0030] The hot pressing template is pulled out, and the upper punch and the lower punch are reset.

[0031] The technical solution of the present invention enables the powder materials to be uniformly filled into the cold pressing die cavity holes through the precise cooperation of the upper punch and the lower punch of the cold pressing mechanism, ensuring the consistency of the powder filling amount, avoiding the situation of too much or too little powder materials, improving the consistency of the physical properties of the product, and ensuring the quality of the product after hot pressing; the powder materials are completely pushed by the punch during the entire filling process, without involving adsorption or residue problems, avoiding the adhesion of the powder materials on the equipment, and ensuring the cleanliness of the filling process. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention, and for those of ordinary skill in the art, other drawings can be obtained based on the structures shown in these drawings without creative efforts.

[0033] Figure 1Schematic structural diagram of an embodiment of the inductance hot-pressing precision powder filling machine of the present invention;

[0034] Figure 2 is Figure 1 the cross-sectional view taken along A-A in

[0035] Figure 3 Schematic structural diagram of another perspective of an embodiment of the inductance hot-pressing precision powder filling machine of the present invention;

[0036] Figure 4 Schematic structural diagram of an embodiment of the cold pressing die core of the present invention;

[0037] Figure 5 Schematic structural diagram of an embodiment of the powder feeding mechanism of the present invention.

[0038] Explanation of the reference numerals in the attached drawings:

[0039] 10. Frame; 20. Cold pressing mechanism; 21. Upper stamping structure; 211. Upper driving part; 212. Upper punch; 22. Lower stamping structure; 221. Lower driving part; 222. Lower punch; 23. Pressing space; 30. Cold pressing die core; 31. Prefabricated block master mold; 311. Forming hole; 32. Mounting plate; 321. First positioning track; 322. Second positioning track; 33. Switching cylinder; 40. Powder feeding mechanism; 41. Powder feeding motor module; 42. Powder box; 43. Vibrator.

[0040] The realization, functional features and advantages of the present invention will be further described with reference to the embodiments and the attached drawings. Detailed implementation manners

[0041] In order to make the purpose, technical solutions and advantages of the present application clearer, the present application will be further described in detail below with reference to the attached drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0042] In response to the problems in the background technology, the inductance hot-pressing precision powder filling machine proposed by the present invention includes:

[0043] Frame 10;

[0044] Cold pressing mechanism 20, the cold pressing mechanism 20 is connected to the frame 10, the cold pressing mechanism 20 includes an upper stamping structure 21 and a lower stamping structure 22 which are arranged vertically opposite to each other, and there is a pressing space 23 between the upper stamping structure 21 and the lower stamping structure 22;

[0045] Cold pressing die core 30, the cold pressing die core 30 is arranged in the pressing space 23, the cold pressing die core 30 includes a preform block master mold 31, the upper stamping structure 21 is located above the preform block master mold 31, the lower stamping structure 22 is located below the preform block master mold 31, and a hot pressing template is slidably connected to the preform block master mold 31;

[0046] Powder feeding mechanism 40, the powder feeding mechanism 40 is connected to one side of the cold pressing die core 30 and is used for filling powder into the preform block master mold 31.

[0047] With reference to Figures 1 to 5As shown, in this embodiment, the frame 10 is the support framework of the entire powder filling machine, usually made of metal materials (such as steel or aluminum alloy), with sufficient rigidity and stability to carry other components and transmit mechanical effects. The upper stamping structure 21 and the lower stamping structure 22 are respectively located on the upper and lower sides of the cold pressing die core 30, and they are the core working components of the cold press. The upper stamping structure 21 usually includes a punch that can move vertically, and its function is to apply pressure to press the powder into shape. The lower stamping structure 22 is similar, usually also a vertically movable punch, used for the reaction force or assisting in forming. The upper punch 212 and the lower punch 222 can be precisely controlled through a servo drive system to ensure that the pressure applied each time is uniform and adjustable. The pressing space 23 between the upper stamping structure 21 and the lower stamping structure 22 is used to place the preform master mold 31, and the powder material is compacted into shape by the pressure of these punches. During the cold pressing forming process, the powder material is compressed and filled into the master mold, and the formed powder block is the preform. The preform master mold 31 is the core component in the cold pressing die core 30, and its design directly determines the shape and size of the preform. Usually, the master mold is a mold with a cavity, and after the powder material is filled, it will be cold pressed into the shape of the preform. The sliding connection between the hot pressing template and the preform master mold 31 allows the hot pressing template to smoothly enter the die core after cold pressing forming. The hot pressing template is a key component in the subsequent hot pressing process to ensure that the shape of the preform does not change during the hot pressing process. The sliding connection can be achieved through a guide rail or slider design to ensure the docking accuracy between the hot pressing template and the master mold. The powder feeding mechanism 40 is used to accurately fill the powder material into the preform master mold 31. Usually, the powder feeding mechanism 40 will include a vibration system, a conveying device (such as a screw conveyor, pneumatic conveying, etc.) and a powder storage device. The vibration system can help the powder material to be evenly distributed into the cavity of the master mold to avoid problems such as powder accumulation or vacancy. The powder feeding mechanism 40 is connected to one side of the cold pressing die core 30 so as to directly feed the powder material into the preform master mold 31. After the filling is completed, the cold pressing process starts, the punch presses down and compacts the powder material, and the formed preform is sent to the next step. The powder feeding mechanism 40 needs to be adjusted according to the characteristics of the powder material (such as particle size, fluidity, etc.). For example, if the powder material has poor fluidity, a vibrating table or an air conveying system can be used to assist in powder feeding. If the powder material has larger particles, a screw conveyor or other mechanical transmission systems may be needed.

[0048] In this application, through the precise cooperation of the upper punch 212 and the lower punch 222 of the cold pressing mechanism 20, the powder material can be evenly filled into the cold pressing die cavity holes, ensuring the consistency of the powder filling amount, avoiding the situation of too much or too little powder material, improving the consistency of the physical properties of the product, and ensuring the quality of the product after hot pressing; the powder material is completely pushed by the punch during the entire filling process, without involving adsorption or residue problems, avoiding the adhesion of the powder material on the equipment, and ensuring the cleanliness of the filling process.

[0049] In a possible implementation, the upper stamping structure 21 includes an upper driving member 211 and an upper punch 212 connected to the upper driving member 211. The lower stamping structure 22 includes two lower driving members 221 and two lower punches 222 respectively connected to the two driving members. The upper punch 212 is located above the precast block matrix 31 and is used to push or apply pressure to the precast block matrix 31. The lower punch 222 is located below the precast block matrix 31 and is used to support or apply pressure to the precast block matrix 31.

[0050] With reference to Figure 1 and Figure 2As shown, in this embodiment, the upper driving member 211 is a component for driving the upper punch 212 to perform longitudinal movement. It can be motor-driven, a hydraulic cylinder, a pneumatic cylinder, etc., and can provide sufficient force to enable the upper punch 212 to perform precise up and down movement. The function of the upper driving member 211 is to apply pressure or push the preform matrix 31 during the cold pressing process by controlling the movement of the upper punch 212. The upper punch 212 is located above the preform matrix 31 and is usually a fixed or adjustable component, which moves up and down under the control of the upper driving member 211. The function of the upper punch 212 is to push or apply pressure to the preform matrix 31 during the downward pressing stage of the cold pressing process, so that the powder can be compacted after filling and plays a key role in the process of forming the preform. The upper punch 212 can have different shapes and sizes to adapt to the forming requirements of different types of preforms. The two lower driving members 221 are respectively located on both sides of the cold pressing mechanism 20 and are used to drive the lower punches 222 to perform corresponding movements. They may be hydraulic cylinders, pneumatic cylinders or servo motors, and ensure the symmetrical or simultaneous operation of the two lower punches 222 through coordinated movement. The design of the two lower driving members 221 can increase the stability of the system and the uniform pressure application to the preform matrix 31. The lower punches 222 are located below the preform matrix 31 and function to support the matrix and apply pressure to the preform matrix 31. The lower punches 222 are usually connected to the lower driving members 221 and provide downward pressure support for the cold pressing process through their up and down movement. During the cold pressing process, the lower punches 222 can also play a role in fixing or adjusting the position of the matrix. By using the two lower punches 222, a uniform pressure distribution can be ensured during cold pressing, avoiding deformation of the preform matrix 31 and thus ensuring the shape accuracy of the preform. The preform matrix 31 is the core part of cold pressing forming, and the powder is compacted and formed into the shape of the preform within the preform matrix 31. The upper punch 212 and the lower punches 222 apply pressure from above and below respectively to ensure that the powder is fully filled and compacted. The function of the upper punch 212 is to press the powder into the preform matrix 31 by applying vertical pressure and push the preform to form. At this time, the movement of the upper punch 212 will ensure the uniform distribution and effective compaction of the powder, making the form of the preform more stable. The function of the lower punches 222 is mainly to support the preform matrix 31 and provide reverse pressure to ensure that the pressure applied by the upper punch 212 will not cause deformation or damage to the matrix. At the same time, the lower punches 222 can also assist in positioning the matrix to ensure that its position does not shift during the forming process. Using the two lower punches 222 can achieve more uniform pressure application and avoid deformation of the matrix or instability of the preform caused by uneven pressure application of a single punch. The double lower punches 222 provide more flexibility and stability in terms of support and pressure application.

[0051] Specifically, the punch and the lower punch 222 require an accurate control system for synchronous operation. A servo motor control system can be adopted, and sensors are used to monitor the pressure and displacement in real time to achieve precise forming control. Hydraulic or pneumatic systems can also achieve similar precise control, especially in scenarios where a large pressure is required. The upper driving member 211 can select a hydraulic, pneumatic or electric drive system according to actual needs. If high control precision is required, the servo motor system is more suitable; if large-scale production is considered, the hydraulic system usually has higher load capacity and working stability. The design of the lower driving member 221 should also match that of the upper driving member 211 to ensure that the two punches can move synchronously during operation and there is no pressure imbalance. The shapes and sizes of the upper punch 212 and the lower punch 222 need to be consistent with the design of the preform master mold 31 to ensure that the applied pressure can be evenly distributed and does not cause damage or deformation of the mold. The preform master mold 31 has high precision requirements, so the surface quality and dimensional control of the punches are also crucial.

[0052] In the present application, through the design of the upper punch 212 and the lower punch 222, the pressing during the powder filling process is made more precise. The upper punch 212 is used to apply the upper pressure, while the lower punch 222 is used to support and apply the lower pressure, ensuring the uniform pressing of the powder, which helps to improve the physical properties and consistency of the formed preform.

[0053] In a possible implementation manner, the cold pressing die core 30 further includes:

[0054] A mounting plate 32, with a first positioning track 321 arranged above the mounting plate 32, the preform master mold 31 is slidably connected within the first positioning track 321, and a second positioning track 322 is arranged below the mounting plate 32, the hot pressing template is slidably connected within the second positioning track 322;

[0055] A switching cylinder 33, the switching cylinder 33 is connected to the mounting plate 32 and is drivingly connected to the preform master mold 31.

[0056] With reference to Figure 1 and Figure 4As shown, in this embodiment, the mounting plate 32 serves as a support structure for fixing the various components of the cold pressing die core 30. It provides a stable platform, enabling other components (such as the positioning track, the preform master mold 31, and the hot pressing template) to be installed and move smoothly and precisely. The mounting plate 32 is located at the bottom of the cold pressing die core 30, playing a role in supporting and fixing the preform master mold 31 and the hot pressing template, ensuring their precise docking during the cold pressing forming and hot pressing processes. The first positioning track 321 is located above the mounting plate 32 and is used for slidably connecting the preform master mold 31. The first positioning track 321 ensures that the preform master mold 31 can move precisely along a predetermined path during the cold pressing and hot pressing processes. The first positioning track 321 enables the preform master mold 31 to slide freely without obstruction, while also ensuring the accuracy and stability of its position, avoiding displacement or deviation during the cold pressing process. The second positioning track 322 is arranged below the mounting plate 32 and is used for slidably connecting the hot pressing template. Under the guidance of the second positioning track 322, the hot pressing template can move precisely to the working position for hot pressing after the cold pressing is completed. The design and installation method of this track are similar to those of the first positioning track 321, ensuring that the hot pressing template can be precisely docked with the preform master mold 31, avoiding uneven hot pressing caused by inaccurate positioning. The role of the hot pressing template in this position is to further process the formed preform master mold 31 (the preform after cold pressing forming) during the hot pressing process. After the cold pressing forming, the hot pressing template guides the preform master mold 31 to the working area of the hot pressing middle template to achieve the subsequent hot pressing forming process. The switching cylinder 33 is used to drive and switch the position of the preform master mold 31, enabling it to be smoothly switched during the cold pressing and hot pressing processes. The switching cylinder 33 ensures that the master mold can be positioned at the corresponding position of the hot pressing template after the cold pressing forming by driving the forward and backward movement of the preform master mold 31, so as to start the hot pressing forming. The switching cylinder 33 is usually controlled by air pressure and has the characteristics of fast and precise operation. Its function is to accurately move the preform master mold 31 to the position of the hot pressing template after the cold pressing forming is completed to ensure the smooth progress of the hot pressing process.

[0057] In this application, by setting the first positioning track 321 and the second positioning track 322, the positioning of the preform master mold 31 and the hot pressing template during the cold pressing process is more accurate. The preform master mold 31 and the hot pressing template can cooperate effectively, avoiding errors caused by the instability of the die core structure. The switching cylinder 33 can drive the movement of the preform master mold 31, facilitating the operation in different working stages, ensuring the smooth conversion during the powder filling process, and improving the flexibility of the operation and the automation level of the equipment.

[0058] In a possible implementation manner, a plurality of limiting holes (not shown) are further opened at the bottom of the mounting plate 32 for the lower punch 222 to pass through.

[0059] In this embodiment, a plurality of limiting holes are provided at the bottom of the mounting plate 32. The main purpose is to provide a path for the lower punch 222 to pass through. These limiting holes ensure that the lower punch 222 can be accurately positioned during movement and limit its excessive movement to avoid interference with other components. The number and position of the limiting holes can be designed according to actual needs, usually set according to the size and stroke of the lower punch 222. Parameters such as the diameter and depth of the holes need to be accurately calculated to ensure that the lower punch 222 can pass through smoothly without jamming or other interferences. The lower punch 222 is located below the cold pressing die core 30 and plays a role in supporting or pressing the preform master mold 31. The lower punch 222 is usually controlled to move up and down by a driving member, applying pressure upward or downward during the cold pressing process. The limiting holes provide an accurate guiding path for the lower punch 222 to ensure its stability during the pressing process. Through these limiting holes, the lower punch 222 can be prevented from deviating from the predetermined movement trajectory, ensuring the precise fit between the lower punch 222 and the preform master mold 31. The setting of the limiting holes is not only to allow the lower punch 222 to pass through, but more importantly, it can play a positioning role during the movement of the lower punch 222. Through the cooperation of the limiting holes, it is ensured that the lower punch 222 can move and be positioned along the predetermined path in different process steps, thereby ensuring the uniformity and stability of the pressing force during the cold pressing process.

[0060] In this application, a plurality of limiting holes provided at the bottom of the mounting plate 32 provide stable support for the lower punch 222, preventing displacement or deformation of the lower punch 222 during the pressing process and improving the accuracy and stability of the equipment.

[0061] In a possible implementation manner, the preform master mold 31 has a plurality of forming holes 311. The upper and lower ends of the forming holes 311 are circular structures with different sizes and are connected by an inclined surface or a curved surface.

[0062] In this embodiment, the forming holes 311 refer to the channels opened in the preform matrix 31. The shape, size, and structure of these holes determine the geometric shape and size of the final formed block. The preform matrix 31 is usually used in the cold pressing process to fill the powder material and form a preliminary preform, and the forming holes 311 are the key to controlling and shaping the shape of the preform. These forming holes 311 control the final shape of the powder by guiding the powder material into and curing it. The design of the holes has an important impact on the filling of the powder material, the accuracy of forming, and the mechanical properties of the preform. The upper and lower ends of the forming holes 311 are circular and of different sizes, indicating that the shape of the holes is not uniform but has different diameters at the upper and lower ends. The circular structures at the upper and lower ends enable the forming holes 311 to guide the powder material to flow under different pressures and finally form a shape that meets the requirements. The larger upper end may facilitate the filling of the powder material, while the smaller lower end helps to compress and form the powder material and maintain the structural stability. When the upper and lower circular ports are connected by an inclined plane, an inclined angle will be formed on the hole wall to help the powder material flow better, reduce the blockage of the powder material, and avoid uneven pressure during the forming process. If a curved surface connection is adopted, the curve of the hole wall will enable the powder material to obtain a more uniform pressure distribution during filling, which helps to avoid the situation of insufficient or excessive powder material at the corners or edges. The design of the curved surface connection can better guide the powder flow and ensure the uniform distribution of the material during the forming process.

[0063] Through the design of multiple forming holes 311 in the preform matrix 31 of the present application, with different-sized circular structures at its upper and lower ends, the distribution ratio of the powder material can be adjusted according to actual needs, especially the powder quantity ratio between the middle and the periphery of the hat-shaped preform, so as to meet the special requirements of the hot pressing process for the powder material distribution.

[0064] In a possible implementation manner, the powder feeding mechanism 40 includes:

[0065] A powder feeding motor module 41, and the powder feeding motor module 41 is connected to the frame 10;

[0066] A powder box 42, the powder box 42 is drivingly connected to the powder feeding motor module 41, and the powder box 42 is used for accommodating the powder material;

[0067] A vibrator 43, the vibrator 43 abuts against the outer wall of the powder box 42 and is used to make the powder material in the powder box 42 fall onto the preform matrix 31.

[0068] With reference to Figure 5As shown, in this embodiment, the powder feeding motor module 41 is a key component that drives the entire powder feeding process, usually including a motor, a transmission device (such as gears, belts, etc.), and an electronic control system. Its main function is to drive the powder cartridge 42 for material transportation, ensuring that the powder can be orderly fed into the precast block matrix 31 under control. By adjusting the rotation speed and working time of the powder feeding motor, the filling amount and speed of the powder can be accurately controlled. The powder feeding motor module 41 is usually connected to the powder cartridge 42 through a motor and gears or a transmission belt to accurately drive the movement of the powder cartridge 42, thereby realizing the precise feeding of the powder. The powder cartridge 42 is a container or storage bin for storing and transporting the powder. The internal design of the powder cartridge 42 usually needs to prevent the powder from caking and ensure that the powder can be released evenly and stably. The main role of the powder cartridge 42 is to store the fed powder and send the powder to the precast block matrix 31 through the drive of the powder feeding motor module 41. The design of the powder cartridge 42 needs to ensure that the powder does not cake during storage and can be conveniently discharged through vibration or other mechanisms. The powder cartridge 42 is connected to the powder feeding motor module 41 through a drive device, and usually an outlet is designed at the bottom of the powder cartridge 42 to ensure that the powder can smoothly fall into the matrix. The vibrator 43 is an external device, usually composed of a motor and a vibration system. The vibrator 43 generates high-frequency vibration to make the powder flow and fall in the powder cartridge 42. The role of the vibrator 43 is to loosen the powder in the powder cartridge 42 and make it flow out smoothly through vibration, ensuring that the powder can be evenly filled into the precast block matrix 31. Vibration can effectively prevent the powder from caking or blocking, thereby ensuring the uniformity and fluidity of the powder. The vibrator 43 generates vibration by contacting the outer wall of the powder cartridge 42, and different methods such as an electric vibrator 43 and a pneumatic vibrator 43 can be used. The electric vibrator 43 is common in this type of equipment, and it generates vibration by driving an eccentric shaft or a vibration plate through a motor.

[0069] In this application, the driving connection between the powder feeding motor module 41 and the powder cartridge 42 makes the powder transportation more accurate. The addition of the vibrator 43 effectively ensures that the powder evenly falls into the precast block matrix 31, avoiding quality problems caused by uneven powder.

[0070] The present invention also proposes a powder filling method for an inductive hot pressing precision powder filling machine, which is applied to the inductive hot pressing precision powder filling machine described in any of the above embodiments, and includes the following steps:

[0071] The powder feeding mechanism transports the powder in the powder cartridge to the precast block matrix through the cooperation of the vibration of the vibrator and the gravity of the powder;

[0072] The lower punch and the precast block matrix cooperate to evenly fill the powder into the forming hole by using gravity and vibration;

[0073] The upper punch presses down to cooperate with the lower punch to compact and form the powder;

[0074] The upper punch rises, the lower punch retracts, and the switching cylinder drives the preform matrix to move backward to seal the preform.

[0075] The hot pressing template enters the second positioning track, the switching cylinder resets, and the upper punch presses down to push the preform into the hot pressing template.

[0076] The hot pressing template is pulled out, and the upper punch and the lower punch reset.

[0077] In this embodiment, first, the powder feeding mechanism (including the powder box and the vibrator) starts to work. The vibrator generates vibrations to help the powder flow in the powder box and gradually transports the powder into the preform matrix under the action of gravity. The vibrations of the vibrator ensure the smooth falling of the powder and its uniform entry into the matrix. Then, the lower punch cooperates with the forming holes of the preform matrix and uses gravity and vibration to evenly fill the forming holes of the matrix with the powder. This process ensures the uniform distribution of the powder and avoids the concentration or uneven filling of the powder. Next, the upper punch starts to press down and cooperates with the lower punch to apply pressure to the filled powder and compact it into shape. This process helps to form a compact preform to ensure that the powder does not disperse during the subsequent hot pressing process. Then, the upper punch rises, the lower punch retracts, and the preform matrix moves backward under the drive of the switching cylinder to seal the formed preform. This step ensures the stability of the preform after cold pressing and prepares for the subsequent hot pressing process. Next, the hot pressing template enters the second positioning track, and the switching cylinder resets. At this time, the upper punch presses down again to push the sealed preform into the hot pressing template for hot pressing forming. This step ensures that the preform can smoothly enter the hot pressing template and be subjected to appropriate pressure and temperature during the hot pressing process. Finally, after the hot pressing template completes the hot pressing process, it is pulled out, and the upper punch and the lower punch reset to prepare for the next operation cycle. This step completes a complete process of powder filling, pressing, and hot pressing.

[0078] In this application, through the vibrations of the vibrator and the action of the gravity of the powder, the powder is evenly transported into the preform matrix, and the powder is compacted by the pressure of the punch, ensuring the uniformity and density of the filling, meeting the requirements of the hot pressing process; the preform matrix can flexibly move backward under the action of the switching cylinder to seal the preform, ensuring that there is no overflow after filling the powder, and when the hot pressing template enters, the preform can be accurately transferred into the hot pressing middle template, avoiding the problems of powder leakage and powder retention, and improving the overall accuracy of production; the entire preform is directly put into the holes of the middle template, avoiding the scattering or retention of the powder during the process, ensuring the integrity of the filling process and the consistency of each forming.

[0079] In the accompanying drawings of this embodiment, the same or similar reference numerals correspond to the same or similar components; in the description of this application, it should be understood that if there are terms such as "upper", "lower", "left", "right", etc. indicating the orientation or positional relationship, it is based on the orientation or positional relationship shown in the accompanying drawings. This is only for the convenience of describing this application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the terms describing the positional relationship in the accompanying drawings are only for illustrative purposes and cannot be construed as a limitation of this patent. For those of ordinary skill in the art, the specific meanings of the above terms can be understood according to specific circumstances.

[0080] The above are only the preferred embodiments of this application and are not intended to limit this application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of this application shall be included within the protection scope of this application.

Claims

1. An inductive hot pressing precision powder filling machine, characterized in that: include: frame; A cold pressing mechanism, the cold pressing mechanism is connected to the frame, the cold pressing mechanism comprises an upper punching structure and a lower punching structure which are arranged vertically opposite to each other, and a pressing space is provided between the upper punching structure and the lower punching structure; A cold pressing mold core, wherein the cold pressing mold core is arranged in the pressing space, the cold pressing mold core comprises a prefabricated block mother mold, the upper punching structure is located above the prefabricated block mother mold, the lower punching structure is located below the prefabricated block mother mold, the prefabricated block mother mold is slidably connected with a hot pressing template, the cold pressing mold core also comprises a mounting plate and a switching cylinder, a first positioning track is arranged above the mounting plate, the prefabricated block mother mold is slidably connected in the first positioning track, a second positioning track is arranged below the mounting plate, and the hot pressing template is slidably connected in the second positioning track; the switching cylinder is connected to the mounting plate and driven to connect the prefabricated block mother mold; a plurality of limiting holes are also provided at the bottom of the mounting plate for the lower punch to pass through, the prefabricated block mother mold has a plurality of forming holes, and the upper and lower ends of the forming holes are circular structures of different sizes and are connected by an inclined surface or a curved surface; A powder feeding mechanism is connected to one side of the cold pressing mold core and is used to fill powder into the prefabricated block mother mold.

2. The induction hot pressing precision powder filling machine according to claim 1, characterized in that: The upper punching structure includes an upper driving member and an upper punch connected to the upper driving member, and the lower punching structure includes two lower driving members and two lower punches respectively connected to the two driving members. The upper punch is located above the prefabricated block mold and is used to push or press the prefabricated block mold. The lower punch is located below the prefabricated block mold and is used to support or press the prefabricated block mold.

3. The induction hot pressing precision powder filling machine according to claim 2, characterized in that: The powder feeding mechanism comprises: A powder feeding motor module, the powder feeding motor module is connected to the frame; A powder box, the powder box is drivingly connected to the powder feeding motor module, and the powder box is used to contain powder; A vibrator is abutted against the outer wall of the powder box and is used to make the powder in the powder box fall into the prefabricated block mold.

4. A powder filling method for an inductive hot pressing precision powder filling machine, applied to the inductive hot pressing precision powder filling machine as claimed in claim 3, characterized in that: The following steps are involved: The powder feeding mechanism conveys the powder in the powder box to the prefabricated block mold through the cooperation of the vibration of the vibrator and the gravity of the powder; The lower punch cooperates with the prefabricated block mother mold to evenly fill the powder into the forming hole by gravity and vibration; The upper punch presses down, cooperating with the lower punch to compact the powder into shape; The upper punch is lifted, the lower punch is retracted, and the switching cylinder drives the prefabricated block mother mold to move backward to seal the prefabricated block; The hot pressing template enters the second positioning track, the switching cylinder is reset, and the upper punch presses down to push the prefabricated block into the hot pressing template; The hot pressing template is pulled out, and the upper punch and the lower punch are reset.

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