CN119626773A - Inductance hot-pressing precise powder filling machine and powder filling method thereof - Google Patents

Abstract

The present invention discloses an inductive hot pressing precision powder filling machine and a powder filling method thereof, wherein the inductive hot pressing precision powder filling machine comprises a frame, a cold pressing mechanism, a cold pressing mold core, and a powder feeding mechanism, wherein the cold pressing mechanism is connected to the frame, and the cold pressing mechanism comprises an upper punching structure and a lower punching structure arranged vertically opposite to each other, and a pressing space is provided between the upper punching structure and the lower punching structure; the cold pressing mold core is arranged in the pressing space, and the cold pressing mold core comprises a prefabricated block mother mold, the upper punching structure is located above the prefabricated block mother mold, and the lower punching structure is located below the prefabricated block mother mold, and the prefabricated block mother mold is slidably connected with a hot pressing template; the 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. The technical solution of the present invention aims to improve the uniformity of powder filling, reduce powder residue, and effectively control the amount of powder filling.

Description

Inductance hot-pressing precise powder filling machine and powder filling method thereof

Technical Field

The invention relates to the technical field of powder filling machines, in particular to an inductance hot-pressing precise powder filling machine and a powder filling method thereof.

Background

In the production process of inductors, powder filling is an important process in the hot-pressing packaging stage, and especially when hot-pressing powder is filled, the accurate filling of the powder plays a critical role in the performance and quality of a final product. The powder filling process in the production of the inductor requires that the powder is uniformly distributed in a plurality of holes of a die so as to ensure that products after hot-pressed packaging have consistent physical characteristics, particularly the accurate control of the powder filling amount, which directly affects the performance and stability of the inductor.

At present, a powder filling device commonly used in the production process of the inductor is a fixed-volume powder filling machine, and the device generally comprises a powder box, a powder filling plate upper cover, a powder filling plate lower cover and a set of hot pressing middle template positioning lifting mechanism. The basic working principle is that powder in the powder box enters holes of a template in a mould through holes on a powder filling plate under the action of gravity and vibration, and the action sequence of the powder filling process is that the holes on the powder filling plate are aligned with conical holes on a powder filling plate upper cover, the powder enters the mould through the holes, and the powder is filled in a vibration, gravity and mould lifting mode.

Although the existing fixed-volume powder filling machine can finish the powder filling task to a certain extent, the existing fixed-volume powder filling machine has obvious defects, so that the existing fixed-volume powder filling machine cannot meet the higher requirements of modern inductance production on powder filling precision and consistency:

The powder filling is uneven, namely the existing powder filling equipment relies on gravity flow and vibration of powder materials, the fluidity of the powder is greatly influenced by the characteristics of the powder materials (such as particle size, humidity, electrostatic adsorption and the like), and the powder filling amount among different die holes is uneven. In the multi-cavity die, the powder tends to be uneven in density due to the difference of physical characteristics when flowing, and consistency of the powder in each cavity is difficult to ensure, so that the accuracy of hot-pressing packaging is affected.

Powder residue problem is that the hole wall in the existing equipment is easy to adsorb with powder, and powder residue on the hole wall can be caused by static electricity, hot melt adhesive components of powder materials, hole wall roughness, equipment excitation and other factors, so that powder filling is incomplete. The residual powder not only affects the accuracy of the powder filling amount, but also causes pollution to the product in the subsequent process.

The powder filling amount is difficult to adjust, the powder filling amount of the traditional powder filling equipment is determined by the volume of a powder filling plate hole, and once the powder filling amount needs to be adjusted in the production process, the powder filling plate and related accessories must be disassembled and replaced. This not only increases the downtime of the production, but also reduces the flexibility and adaptability of the device.

Disclosure of Invention

The invention mainly aims to provide an inductance hot-pressing precise powder filling machine and a powder filling method thereof, which aim to improve the uniformity of powder filling, reduce powder residues and effectively control the powder filling amount.

In order to achieve the above purpose, the invention provides an inductance hot-pressing precise powder filling machine, comprising:

A frame;

The cold pressing mechanism is connected to the frame and comprises an upper punching structure and a lower punching structure which are vertically and oppositely arranged, and a pressing space is reserved between the upper punching structure and the lower punching structure;

The cold pressing mold core is arranged in the pressing space, the cold pressing mold core comprises a precast block master type, the upper punching structure is positioned above the precast block master type, the lower punching structure is positioned below the precast block master type, and the precast block master type is connected with a hot pressing mold plate in a sliding manner;

And the powder feeding mechanism is connected to one side of the cold pressing mold core and used for filling powder into the prefabricated block matrix.

In one possible embodiment, the upper punching structure includes an upper driving member and an upper punch connected to the upper driving member, the lower punching structure includes two lower driving members and two lower punches connected to the two driving members, respectively, the upper punch is located above the prefabricated block matrix for pushing or pressing the prefabricated block matrix, and the lower punch is located below the prefabricated block matrix for supporting or pressing the prefabricated block matrix.

In one possible embodiment, the cold press mold core further comprises:

The hot-pressing die plate is arranged on the lower side of the mounting plate, and is connected with the first positioning rail in a sliding way;

and the switching cylinder is connected with the mounting plate and is in driving connection with the prefabricated block matrix.

In one possible implementation manner, a plurality of limiting holes are further formed in the bottom of the mounting plate and used for the lower punch to pass through.

In one possible implementation manner, the prefabricated block is provided with a plurality of forming holes in a mother shape, and the upper end and the lower end of each forming hole are of round structures with different sizes and are connected through inclined planes or curved surfaces.

In one possible embodiment, the powder feeding mechanism includes:

The powder feeding motor module is connected to the frame;

The powder box is in driving connection with the powder feeding motor module and is used for accommodating powder;

And the vibrator is abutted to the outer wall of the powder box and used for enabling powder in the powder box to fall to the prefabricated block mother type.

In order to achieve the above object, the present invention further provides a powder filling method of an inductance hot-pressing precise powder filling machine, which is applied to the inductance hot-pressing precise powder filling machine according to any one of the possible embodiments, and includes the following steps:

the powder feeding mechanism is used for conveying powder in the powder box to the prefabricated block matrix through the cooperation of the vibration of the vibrator and the gravity of the powder;

the lower punch is matched with the prefabricated block mother type, and powder is uniformly filled into the forming holes by utilizing gravity and vibration;

The upper punch is pressed down, and the powder is pressed and molded by matching with the lower punch;

The upper punch is lifted, the lower punch is retracted, and the switching cylinder drives the prefabricated block to move backwards to seal the prefabricated block;

The hot-pressing template enters a second positioning track, the switching cylinder is reset, and the upper punch presses down to push the precast block to enter the hot-pressing template;

And (5) pulling out the hot-pressing template, and resetting the upper punch and the lower punch.

According to the technical scheme, by adopting the accurate matching of the upper punch and the lower punch of the cold pressing mechanism, powder can be uniformly filled into the cold pressing die cavity, the consistency of the powder filling amount is ensured, the condition of excessive or insufficient powder is avoided, the consistency of the physical characteristics of products is improved, the quality of the products after hot pressing is ensured, the powder is completely pushed by the punches in the whole filling process, the problems of adsorption or residue are not involved, the adhesion of the powder on equipment is avoided, and the cleanliness of the filling process is ensured.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to the structures shown in these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic diagram of an embodiment of an inductance hot-pressing precision powder filling machine according to the present invention;

FIG. 2 is a cross-sectional view at A-A in FIG. 1;

FIG. 3 is a schematic view of an embodiment of an inductance hot-pressing precision powder filling machine according to the present invention;

FIG. 4 is a schematic view of an embodiment of a cold press mold core of the present invention;

fig. 5 is a schematic structural view of an embodiment of the powder feeding mechanism of the present invention.

Reference numerals illustrate:

10. The device comprises a frame, a cold pressing mechanism, a 21, an upper punching structure, a 211, an upper driving part, a 212, an upper punch, a 22, a lower punching structure, a 221, a lower driving part, a 222, a lower punch, a 23, a pressing space, a 30, a cold pressing mold core, a 31, a prefabricated block matrix, a 311, a forming hole, a 32, a mounting plate, a 321, a first positioning track, a 322, a second positioning track, a 33, a switching cylinder, a 40, a powder feeding mechanism, a 41, a powder feeding motor module, a 42, a powder box, a 43 and a vibrator.

The achievement of the objects, functional features and advantages of the present invention will be further described with reference to the accompanying drawings, in conjunction with the embodiments.

Detailed Description

The present application will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present application more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the application.

Aiming at the problems of the background technology, the invention provides an inductance hot-pressing precise powder filling machine, which comprises:

A frame 10;

The cold pressing mechanism 20 is connected to the frame 10, the cold pressing mechanism 20 comprises an upper punching structure 21 and a lower punching structure 22 which are vertically and oppositely arranged, and a pressing space 23 is formed between the upper punching structure 21 and the lower punching structure 22;

The cold pressing mold core 30 is arranged in the pressing space 23, the cold pressing mold core 30 comprises a precast block master type 31, the upper punching structure 21 is positioned above the precast block master type 31, the lower punching structure 22 is positioned below the precast block master type 31, and the precast block master type 31 is connected with a hot pressing mold plate in a sliding manner;

And the powder feeding mechanism 40 is connected to one side of the cold pressing mold core 30, and is used for filling powder into the prefabricated block master type 31.

Referring to fig. 1 to 5 in combination, in this embodiment, the frame 10 is a supporting framework of the whole powder filling machine, and is usually made of a metal material (such as steel or aluminum alloy) with sufficient rigidity and stability for carrying other components and transmitting mechanical effects. The upper punch structure 21 and the lower punch structure 22 are respectively located at the upper and lower sides of the cold press core 30, which are core working parts of the cold press. The upper punch structure 21 typically includes a vertically movable punch that is operative to apply pressure to press the powder into shape. The lower punch structure 22 is similar and is also typically a vertically movable punch for reaction or auxiliary forming. The upper ram 212 and the lower ram 222 can be precisely controlled by a servo drive system to ensure that the pressure applied each time is uniform and adjustable. The pressing space 23 between the upper and lower punch structures 21 and 22 is used to place the prefabricated block matrix 31 and compact the powder by the pressure of these punches. In the cold press molding process, the powder is compressed and filled into a mother shape, and the molded powder block is a precast block. The block matrix 31 is a core component in the cold press mold core 30, and its design directly determines the shape and size of the block. Typically, the master is a mold with cavities that are filled with powder and cold-pressed to form the shape of the preform. The sliding connection between the hot-press mold plate and the prefabricated block master 31 allows the hot-press mold plate to enter the mold core smoothly after cold press molding. The hot-pressing template is a key component in the subsequent hot-pressing process, and ensures that the shape of the precast block is not changed in the hot-pressing process. The sliding connection may be achieved by a rail or slider design, ensuring the butt joint precision of the hot-pressing template and the mother type. The powder feeding mechanism 40 is used to precisely fill the powder into the prefabricated block matrix 31. Typically, the powder feeding mechanism 40 will include a vibrating system, a conveyor (e.g., screw conveyor, air flow conveyor, etc.), and a powder storage device. The vibration system can help the powder to be uniformly distributed in the female cavity, so that the problem of powder accumulation or vacancy is avoided. The powder feeding mechanism 40 is connected to one side of the cold press mold core 30 so as to feed powder directly into the prefabricated block master 31. After filling is completed, the cold pressing process is started, the punch presses down and compacts the powder, and the formed precast block is sent to the next link. The powder feeding mechanism 40 is required to be adjusted according to the characteristics of the powder (such as particle size, fluidity, etc.). For example, if the powder is less fluid, a vibrating table or air delivery system may be used to assist in powder delivery. In the case of larger particle powders, it may be desirable to use an auger or other mechanical conveying system.

The application adopts the accurate matching of the upper punch 212 and the lower punch 222 of the cold pressing mechanism 20 to ensure that powder can be uniformly filled into the cold pressing die cavity holes, ensures the consistency of the powder filling quantity, avoids the condition of excessive or insufficient powder, improves the physical property consistency of products, ensures the quality of the products after hot pressing, ensures that the powder is completely pushed by the punches in the whole filling process, does not involve the problem of adsorption or residue, avoids the adhesion of the powder on equipment and ensures the cleanliness of the filling process.

In one possible embodiment, the upper punching structure 21 includes an upper driving part 211 and an upper punch 212 connected to the upper driving part 211, the lower punching structure 22 includes two lower driving parts 221 and two lower punches 222 connected to the two driving parts, respectively, the upper punch 212 is located above the prefabricated block matrix 31 for pushing or pressing the prefabricated block matrix 31, and the lower punch 222 is located below the prefabricated block matrix 31 for supporting or pressing the prefabricated block matrix 31.

As shown in combination with reference to fig. 1 and 2, in the present embodiment, the upper driver 211 is a member for driving the upper punch 212 to perform a longitudinal movement. Which may be motor driven, hydraulic or pneumatic, etc., provides sufficient force to move the upper punch 212 precisely up and down. The upper driving member 211 functions to apply pressure or push the prefabricated block master 31 during the cold pressing process by controlling the movement of the upper punch 212. The upper punch 212 is located above the prefabricated block matrix 31, and is usually a fixed or adjustable member, which is moved up and down by the control of the upper driving member 211. The upper punch 212 functions to push or press the preform matrix 31 during the pressing down stage of the cold pressing process so that the powder can be compacted after filling and plays a key role in forming the preform. The upper punch 212 may be provided with different shapes and sizes to accommodate different types of block forming requirements. Two lower driving members 221 are respectively located at two sides of the cold pressing mechanism 20, and are used for driving the lower punch 222 to move correspondingly. They may be hydraulic cylinders, pneumatic cylinders or servomotors that move in unison to ensure that the two lower punches 222 are working symmetrically or simultaneously. The design of the two lower driving members 221 can increase the stability of the system and uniformly press the prefabricated block matrix 31. The lower punch 222 is positioned below the prefabricated block master 31, and functions to support the master and to press the prefabricated block master 31. The lower punch 222 is typically connected to a lower drive member 221, which provides pressure support to the underside of the cold pressing process by its up and down movement. The lower punch 222 may also function to fix or adjust the position of the matrix during cold pressing. By using two lower punches 222, it is possible to ensure uniform pressure distribution at the time of cold pressing, avoid deformation of the prefabricated block matrix 31, and further ensure shape accuracy of the prefabricated block. The prefabricated block master 31 is a core portion of cold press molding, and powder is compacted and molded into the shape of the prefabricated block within the prefabricated block master 31. The upper punch 212 and the lower punch 222 apply pressure from above and below, respectively, ensuring that the powder is sufficiently filled and compacted. The upper punch 212 functions to press the powder into the preform block matrix 31 by applying vertical pressure and to push the preform block into shape. At this time, the movement of the upper punch 212 ensures uniform distribution and effective compaction of the powder, so that the form of the prefabricated block is more stable. The lower punch 222 mainly serves to support the prefabricated block matrix 31 and provide a reverse pressure, ensuring that the pressure applied by the upper punch 212 does not cause deformation or breakage of the matrix. Meanwhile, the lower punch 222 can assist in positioning the master model, so that the position of the lower punch in the forming process is ensured not to deviate. The use of two lower punches 222 allows for more uniform pressing, avoiding deformation of the matrix or instability of the prefabricated block due to uneven pressing by a single punch. The double lower punch 222 provides more flexibility and stability in support and compression.

Specifically, the ram and the lower ram 222 require precise control systems to operate synchronously, and a servo motor control system can be employed to monitor pressure and displacement in real time by sensors to achieve precise molding control. Hydraulic or pneumatic systems can also achieve similar precise control, especially in situations where greater pressures are required. The upper driving member 211 may be a hydraulic, pneumatic or electric driving system according to actual requirements. The servo motor system is more suitable if higher control accuracy is required, and the hydraulic system generally has higher load capacity and working stability if mass production is considered. The design of the lower drive 221 should also match the upper drive 211 to ensure that the two punches move synchronously during operation and that no pressure imbalance occurs. The shape and size of the upper punch 212 and the lower punch 222 need to be consistent with the design of the prefabricated block matrix 31 to ensure that the applied pressure can be evenly distributed without causing damage or deformation of the die. The accuracy of the prefabricated block matrix 31 is required to be high, so that the surface quality and size control of the punch are also important.

The application ensures more accurate pressing in the powder filling process through the design of the upper punch 212 and the lower punch 222, wherein the upper punch 212 is used for applying upper pressure, the lower punch 222 is used for supporting and applying lower pressure, so that uniform pressing of powder is ensured, and the physical characteristics and consistency of the formed precast block are facilitated.

In one possible embodiment, the cold press core 30 further comprises:

The prefabricated block comprises a mounting plate 32, wherein a first positioning track 321 is arranged above the mounting plate 32, the prefabricated block main type 31 is slidably connected in the first positioning track 321, a second positioning track 322 is arranged below the mounting plate 32, and the hot-pressing template is slidably connected in the second positioning track 322;

A switching cylinder 33, wherein the switching cylinder 33 is connected to the mounting plate 32 and is in driving connection with the prefabricated block master 31.

Referring to fig. 1 and 4 in combination, in this embodiment, a mounting plate 32 serves as a support structure for securing the various components of the cold press die core 30. It provides a stable platform to enable other parts (such as the positioning rail, the prefabricated block matrix 31 and the hot-pressing mold plate) to be smoothly and precisely installed and moved. The mounting plate 32 is positioned at the bottom of the cold press mold core 30, and plays a role in supporting and fixing the prefabricated block matrix 31 and the hot press mold plate, so as to ensure accurate butt joint of the prefabricated block matrix 31 and the hot press mold plate in the cold press molding and hot press processes. The first positioning rail 321 is located above the mounting plate 32 and is used for slidably connecting the prefabricated block female mold 31. The first positioning rail 321 ensures that the prefabricated block master 31 can be precisely moved along a predetermined path during cold and hot pressing. The first positioning rail 321 enables the prefabricated block master 31 to slide freely under the condition of being not hindered, and meanwhile, the accuracy and stability of the position of the prefabricated block master are guaranteed, and displacement or offset in the cold pressing process is avoided. The second positioning rail 322 is disposed below the mounting plate 32 and is used for slidably connecting the hot pressing mold plate, and the hot pressing mold plate can be precisely moved to the hot pressing working position after cold pressing is completed through the guidance of the second positioning rail 322. The design and the mounting mode of the rail are similar to those of the first positioning rail 321, so that the hot-pressing template can be accurately abutted with the prefabricated block master type 31, and uneven hot pressing caused by inaccurate positioning is avoided. The function of the hot-pressing template at this position is to further process the formed prefabricated block master 31 (prefabricated block subjected to cold-pressing molding) in the hot-pressing process, and after the cold-pressing molding, the hot-pressing template guides the prefabricated block master 31 to the working area of the hot-pressing middle template, so that the subsequent hot-pressing molding process is realized. The switching cylinder 33 is used to drive and switch the position of the prefabricated block master 31 so that it can be smoothly switched between cold and hot pressing. The switching cylinder 33 ensures that the master mold can be positioned to a corresponding position of the hot press mold plate after cold press molding by driving the front and rear movement of the master mold 31 of the precast block so as to start hot press molding. The switching cylinder 33 is typically pneumatically controlled and has fast and accurate operating characteristics. The function of the hot pressing machine is to accurately move the prefabricated block master model 31 to the hot pressing template position after cold pressing molding is finished so as to ensure the smooth proceeding of the hot pressing process.

According to the application, the first positioning track 321 and the second positioning track 322 are arranged, so that the prefabricated block master type 31 and the hot pressing template are positioned more accurately in the cold pressing process, the prefabricated block master type 31 and the hot pressing template can be effectively matched, errors caused by instability of a mold core structure are avoided, the prefabricated block master type 31 can be driven to move by the switching cylinder 33, the operation at different working stages is convenient, smooth conversion in the powder filling process is ensured, and the flexibility of the operation and the automation level of equipment are improved.

In one possible embodiment, a plurality of limiting holes (not shown) are also formed in the bottom of the mounting plate 32 for the lower punch 222 to pass through.

In this embodiment, the bottom of the mounting plate 32 is provided with a plurality of limiting holes, the main purpose of which is to provide a path for the lower punch 222 to pass through, and these limiting holes ensure that the lower punch 222 can be accurately positioned during movement and limit excessive movement thereof, so as to avoid interference with other components. The number and location of the limiting holes may be designed according to actual needs, and are generally set according to the size and travel of the lower punch 222. The diameter, depth, etc. parameters of the hole need to be precisely calculated to ensure that the lower punch 222 can pass smoothly without jamming or other interference. The lower punch 222 is positioned below the cold press mold core 30 to support or press the prefabricated block matrix 31, and the lower punch 222 is controlled to move up and down by a driving member, so that pressure is applied upward or downward during the cold press molding. The limiting aperture provides an accurate guide path for the lower punch 222, ensuring its stability during the pressing process. By these limit holes, the lower punch 222 can be prevented from deviating from a predetermined movement locus, ensuring accurate fitting of the lower punch 222 with the prefabricated block master 31. The setting of spacing hole not only is in order to let the lower punch 222 pass through, and more importantly, it can play the positioning action at the in-process that lower punch 222 removed, through the cooperation of spacing hole, ensures that lower punch 222 can remove and fix a position according to predetermined route in different process steps to guarantee the homogeneity and the stability of the pressing force in the cold pressing process.

The application provides stable support for the lower punch 222 through the plurality of limiting holes arranged at the bottom of the mounting plate 32, prevents the lower punch 222 from displacement or deformation in the pressing process, and improves the precision and stability of the equipment.

In one possible implementation manner, the prefabricated block master mold 31 is provided with a plurality of forming holes 311, and the upper end and the lower end of each forming hole 311 are of circular structures with different sizes and are connected through inclined planes or curved surfaces.

In this embodiment, the forming holes 311 are holes formed in the prefabricated block matrix 31, the shape, size and structure of the holes determine the geometry and size of the final formed block, the prefabricated block matrix 31 is usually used in the cold pressing process to fill powder and form the preliminary prefabricated block, and the forming holes 311 are key to control and shape the prefabricated block. These shaped holes 311 control the final shape of the powder by guiding the powder into and curing the powder, the design of the holes having an important influence on the filling of the powder, the accuracy of the shaping and the mechanical properties of the prefabricated block. The upper and lower ends of the shaped aperture 311 are rounded and of different sizes, indicating that the aperture is not uniform in shape but has different diameters up and down. The rounded configuration of the upper and lower ends allows the shaping orifice 311 to direct the powder flow at different pressures and ultimately to form a desired shape, with the larger upper end potentially facilitating filling of the powder and the smaller lower end helping to compress the powder and maintain structural stability. When the upper circular port and the lower circular port are connected through the inclined plane, the hole wall can form an inclined angle, so that powder is helped to flow better, the blocking of the powder is reduced, and uneven pressure is avoided in the forming process. If the curved surface connection is adopted, the curve of the hole wall can lead the powder to obtain more uniform pressure distribution during filling, which is helpful for avoiding the condition of insufficient or excessive powder at corners or edges, and the curved surface connection design can better guide the powder to flow and ensure uniform distribution of the materials in the forming process.

The application designs the plurality of forming holes 311 of the prefabricated block matrix 31, and the upper end and the lower end of the forming holes are of round structures with different sizes, so that the distribution proportion of powder can be adjusted according to actual needs, in particular to the powder quantity proportion in the middle and around the hat-shaped prefabricated block, thereby meeting the special requirement of the hot pressing technology on the powder distribution.

In one possible embodiment, the powder feeding mechanism 40 includes:

a powder feeding motor module 41, wherein the powder feeding motor module 41 is connected to the frame 10;

a powder box 42, wherein the powder box 42 is in driving connection with the powder feeding motor module 41, and the powder box 42 is used for accommodating powder;

And a vibrator 43, wherein the vibrator 43 is abutted against the outer wall of the powder box 42, and is used for making the powder in the powder box 42 fall to the prefabricated block female type 31.

Referring to fig. 5 in combination, in this embodiment, the powder feeding motor module 41 is a key component for driving the whole powder feeding process, and generally includes a motor, a transmission device (such as a gear, a belt, etc.), and an electric control system. The main function of the powder feeding device is to drive the powder box 42 to carry out material conveying, ensure that powder can be orderly fed into the prefabricated block matrix 31 under control, and accurately control the filling quantity and speed of the powder by adjusting the rotating speed and the working time of the powder feeding motor. The powder feeding motor module 41 is usually connected with a gear or a transmission belt through a motor, and precisely drives the powder box 42 to move, so that powder is fed accurately. The powder box 42 is a container or storage bin for storing and transporting powder, and the design of the interior of the powder box 42 is generally required to prevent the powder from agglomerating and ensure uniform and stable release of the powder. The main function of the powder box 42 is to store the fed powder and feed the powder to the prefabricated block master 31 by the driving of the powder feed motor module 41, and the design of the powder box 42 is required to ensure that the powder does not agglomerate during storage and can be discharged conveniently by vibration or other mechanisms. The powder box 42 is connected with the powder feeding motor module 41 through a driving device, and a discharge hole is usually designed at the bottom of the powder box 42, so that powder can fall into a mother shape smoothly. The vibrator 43 is an external device, typically composed of a motor and a vibration system, and the vibrator 43 causes powder to flow and fall within the powder box 42 by generating high-frequency vibrations. The vibrator 43 is used for loosening and smoothly flowing out the powder in the powder box 42 through vibration, so that the powder can be ensured to be uniformly filled into the prefabricated block matrix 31, and the vibration can effectively prevent the powder from caking or blocking, so that the uniformity and the fluidity of the powder are ensured. The vibrator 43 vibrates by contacting with the outer wall of the powder container 42, and various modes such as an electric vibrator 43, a pneumatic vibrator 43, etc. are adopted, and the electric vibrator 43 is commonly used in this type of apparatus, which vibrates by driving an eccentric shaft or a vibrating plate by a motor.

According to the application, the powder is conveyed more accurately through the driving connection of the powder conveying motor module 41 and the powder box 42, the addition of the vibrator 43 effectively ensures that the powder uniformly falls into the prefabricated block matrix 31, and the quality problem caused by uneven powder is avoided.

The invention also provides a powder filling method of the inductance hot-pressing precise powder filling machine, which is applied to the inductance hot-pressing precise powder filling machine according to any embodiment, and comprises the following steps:

the powder feeding mechanism is used for conveying powder in the powder box to the prefabricated block matrix through the cooperation of the vibration of the vibrator and the gravity of the powder;

the lower punch is matched with the prefabricated block mother type, and powder is uniformly filled into the forming holes by utilizing gravity and vibration;

The upper punch is pressed down, and the powder is pressed and molded by matching with the lower punch;

The upper punch is lifted, the lower punch is retracted, and the switching cylinder drives the prefabricated block to move backwards to seal the prefabricated block;

The hot-pressing template enters a second positioning track, the switching cylinder is reset, and the upper punch presses down to push the precast block to enter the hot-pressing template;

And (5) pulling out the hot-pressing template, and resetting the upper punch and the lower punch.

In the present embodiment, first, the powder feeding mechanism (including the powder cartridge and the vibrator) starts to operate. The vibrator helps powder to flow in the powder box by generating vibration, and meanwhile, the powder is gradually conveyed into the prefabricated block matrix by utilizing the gravity effect. The vibration of the vibrator ensures smooth falling of the powder and uniform entering of the mother type. Then, the lower punch is matched with the forming hole of the prefabricated block mother shape, and the powder is uniformly filled into the forming hole of the mother shape by utilizing the gravity and vibration. The process ensures uniform distribution of the powder and avoids concentrated or uneven filling of the powder. Then, the upper punch begins to press down, and is matched with the lower punch to apply pressure to the filled powder to compress and shape the powder. This process helps to form a compact preform block to ensure that the powder does not spread during subsequent hot pressing. Then, the upper punch is lifted, the lower punch is retracted, and the prefabricated block matrix is driven by the switching cylinder to move backwards, so that the formed prefabricated block is sealed, the stability of the prefabricated block after cold pressing is ensured, and the prefabricated block is ready for the subsequent hot pressing process. And then, the hot pressing template enters a second positioning track, and the switching cylinder is reset. At this time, the upper punch presses down again, the sealed precast block is pushed into the hot-pressing template, and hot-pressing molding is prepared, so that the precast block can smoothly enter the hot-pressing template, and proper pressure and temperature effects are obtained in the hot-pressing process. Finally, after the hot pressing process is finished, the hot pressing template is pulled out, the upper punch and the lower punch are reset and ready to enter the next operation period, and the whole process of filling powder, pressing and hot pressing is finished.

The application evenly conveys the powder into the prefabricated block matrix through the vibration of the vibrator and the gravity action of the powder, compresses the powder through the pressing of the punch, ensures the filling uniformity and compactness, meets the requirement of a hot pressing process, can flexibly move back to seal the prefabricated block under the action of the switching cylinder, ensures that the powder is not overflowed after filling, can accurately transfer the prefabricated block into the hot pressing middle template when the hot pressing template enters, avoids the problems of powder leakage and powder retention, improves the overall precision of production, directly inputs the whole prefabricated block into the holes of the middle template, avoids the scattering or retention of the powder among working procedures, and ensures the integrity of the filling process and the consistency of each forming.

In the description of the present application, it should be understood that, if there is an orientation or positional relationship indicated by terms such as "upper", "lower", "left", "right", etc. based on the orientation or positional relationship shown in the drawings, it is merely for convenience of describing the present application and simplifying the description, and it is not intended to indicate or imply that the apparatus or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus the terms describing the positional relationship in the drawings are merely for exemplary illustration and are not to be construed as limitations of the present patent, and that the specific meaning of the terms described above may be understood by those skilled in the art according to specific circumstances.

The foregoing description of the preferred embodiments of the application is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the application.

Claims (7)

1. An inductance hot-pressing precision powder filling machine is characterized by comprising:

A frame;

The cold pressing mechanism is connected to the frame and comprises an upper punching structure and a lower punching structure which are vertically and oppositely arranged, and a pressing space is reserved between the upper punching structure and the lower punching structure;

The cold pressing mold core is arranged in the pressing space, the cold pressing mold core comprises a precast block master type, the upper punching structure is positioned above the precast block master type, the lower punching structure is positioned below the precast block master type, and the precast block master type is connected with a hot pressing mold plate in a sliding manner;

And the powder feeding mechanism is connected to one side of the cold pressing mold core and used for filling powder into the prefabricated block matrix.

2. The inductive hot-pressing precise powder filling machine according to claim 1, wherein the upper punching structure comprises an upper driving piece and an upper punch connected with the upper driving piece, the lower punching structure comprises two lower driving pieces and two lower punches respectively connected with the two driving pieces, the upper punch is positioned above the prefabricated block matrix and used for pushing or pressing the prefabricated block matrix, and the lower punch is positioned below the prefabricated block matrix and used for supporting or pressing the prefabricated block matrix.

3. The induction hot-pressing precision powder filling machine according to claim 2, wherein the cold-pressing mold core further comprises:

The hot-pressing die plate is arranged on the lower side of the mounting plate, and is connected with the first positioning rail in a sliding way;

and the switching cylinder is connected with the mounting plate and is in driving connection with the prefabricated block matrix.

4. The inductance hot-pressing precise powder filling machine according to claim 3, wherein a plurality of limiting holes are further formed in the bottom of the mounting plate and used for the lower punch to pass through.

5. The induction hot-pressing precise powder filling machine according to claim 3, wherein the prefabricated block is provided with a plurality of forming holes, and the upper end and the lower end of each forming hole are of round structures with different sizes and are connected through inclined planes or curved surfaces.

6. The inductance hot pressing precision powder filling machine according to any one of claims 1 to 5, wherein the powder feeding mechanism comprises:

The powder feeding motor module is connected to the frame;

The powder box is in driving connection with the powder feeding motor module and is used for accommodating powder;

And the vibrator is abutted to the outer wall of the powder box and used for enabling powder in the powder box to fall to the prefabricated block mother type.

7. A powder filling method of an inductance hot-pressing precise powder filling machine, which is applied to the inductance hot-pressing precise powder filling machine according to any one of claims 1 to 6, and is characterized by comprising the following steps:

the powder feeding mechanism is used for conveying powder in the powder box to the prefabricated block matrix through the cooperation of the vibration of the vibrator and the gravity of the powder;

the lower punch is matched with the prefabricated block mother type, and powder is uniformly filled into the forming holes by utilizing gravity and vibration;

The upper punch is pressed down, and the powder is pressed and molded by matching with the lower punch;

The upper punch is lifted, the lower punch is retracted, and the switching cylinder drives the prefabricated block to move backwards to seal the prefabricated block;

The hot-pressing template enters a second positioning track, the switching cylinder is reset, and the upper punch presses down to push the precast block to enter the hot-pressing template;

And (5) pulling out the hot-pressing template, and resetting the upper punch and the lower punch.