CN111653418A - Powder press molding device and preparation system of magnetic element - Google Patents

Abstract

The application provides a powder pressing device and a preparation system of a magnetic element, and relates to the technical field of powder molding. The powder pressing device includes a feeding mechanism, a feeding mechanism and a molding die; the feeding mechanism is used for supplying powder materials; the feeding mechanism is communicated with the feeding mechanism through a connecting pipe, and the feeding mechanism is used for The powder material is injected into the forming mold, and the forming mold is used for pressing the powder material into components; wherein, at least one of the feeding mechanism, the connecting pipe, the feeding mechanism and the forming mold is Both are provided with a heating mechanism and/or a heat preservation mechanism. The present application has the characteristics of low molding pressure, high efficiency, and high saturation magnetic flux density Bs of the magnetic element obtained by molding, which can alleviate the problems of low molding efficiency and easy damage to the mold of the existing powder pressing device.

Description

Powder press molding device and preparation system of magnetic element

technical field

The present application relates to the technical field of powder molding, and in particular, to a powder pressing device and a preparation system of a magnetic element.

Background technique

As an important component material, soft magnetic materials can be made into magnetic cores for the manufacture of various inductors, transformers, filters, choke coils, etc., and are widely used in modern electric power, electronic information and other fields, such as industrial automation And automobile, office automation equipment, computer and peripheral equipment, digital communication and analog communication equipment, Internet, household appliances, aerospace and military fields.

For example, many magnetic components are used in automobiles. As key components in automotive electronic technology, magnetic components have a wide range of applications in automobiles, such as automotive safety and information systems, electronic control units, in-vehicle multimedia systems, energy Magnetic components may be included in transmission systems, etc. At present, the magnetic components used in automotive electronic technology are mainly made of soft ferrite materials, iron-based soft magnetic composite materials, and NdFeB rare earth permanent magnet materials. In recent years, with the continuous development of industry, science and electronics industry, automobiles are constantly developing in the direction of light weight, intelligence and electrification, and the requirements for magnetic materials are getting higher and higher. The existing common iron-based metal magnetic core materials have high power consumption, especially in various applications where the DC superposition is large and the voltage is low, the disadvantages are more obvious. Therefore, in order to make it work under harsh temperature conditions such as changes in outside air temperature and heat in the engine room, in addition to requiring low power consumption at high temperatures, it is also required to maintain a high saturation magnetic flux density or saturation under high temperature conditions. Magnetic induction (Bs). Generally, for the same material, the main way to improve Bs of Fe-based soft magnetic composites is to increase its forming density.

At present, in order to improve the saturation magnetic flux density Bs of the soft magnetic composite material, the commonly adopted measure is to increase the tonnage of the press and directly increase the molding pressure. However, the direct consequence of this method is serious mold loss, increased cost, or even incapable of mass production. In addition, it also includes the high cost of increasing the tonnage of the press.

SUMMARY OF THE INVENTION

The purpose of the present application is to provide a powder pressing device and a preparation system for magnetic components, which have the characteristics of low molding pressure, high efficiency, and high saturation magnetic flux density Bs of the magnetic components obtained by molding, which can overcome the above problems or at least The above-mentioned technical problems are partially solved.

To achieve the above purpose, the technical scheme adopted in this application is:

According to one aspect of the present application, the present application provides a powder pressing device, including a feeding mechanism, a feeding mechanism and a forming die;

The feeding mechanism is used for supplying powder materials; the feeding mechanism is communicated with the feeding mechanism through a connecting pipe, and the feeding mechanism is used for injecting powder materials into the forming mold, and the forming mold is used for Press powder material into components;

Wherein, at least two of the feeding mechanism, the connecting pipe, the feeding mechanism and the forming mold are provided with a heating mechanism and/or a heat preservation mechanism.

In a possible implementation manner, the heating mechanism includes a first heating mechanism and a second heating mechanism, the first heating mechanism is provided on the feeding mechanism, and the second heating mechanism is provided on the forming mold .

In a possible implementation manner, the feeding mechanism includes a hopper, and the first heating mechanism includes a first heating element and a first temperature control component;

The first temperature control component is used for monitoring the temperature of the powder material in the hopper, and the first heating element is arranged on the side wall of the hopper.

In a possible implementation manner, the powder pressing device further includes a stirring mechanism, and at least part of the stirring mechanism is disposed inside the hopper.

In a possible implementation manner, the forming mold includes an upper mold, a female mold and a lower mold, the female mold is disposed below the upper mold, and the lower mold is disposed under the female mold, so The second heating mechanism includes a second heating element and a second temperature control component;

The second temperature control component is used for monitoring the temperature of the powder material in the molding die, and the second heating element is arranged on the side wall of the mother mold.

In a possible implementation manner, the heat preservation mechanism includes a first heat preservation mechanism and a second heat preservation mechanism, the first heat preservation mechanism is disposed on the connecting pipe, and the second heat preservation mechanism is disposed in the feeding mechanism.

In a possible implementation manner, the first thermal insulation mechanism includes a first thermal insulation layer, and the first thermal insulation layer covers the outer periphery of the connecting pipe.

In a possible implementation manner, the second heat preservation mechanism includes a second heat preservation layer, and the second heat preservation layer covers the outer side wall of the feeding mechanism.

In a possible implementation manner, both the feeding mechanism and the forming die are provided with the heating mechanism;

Both the connecting pipe and the feeding mechanism are provided with the heat preservation mechanism.

According to another aspect of the present application, the present application provides a preparation system of a magnetic element, comprising the above-mentioned powder pressing device.

Compared with the prior art, the technical solution provided by the application can achieve the following beneficial effects:

The powder pressing device provided by the present application includes a feeding mechanism, a feeding mechanism and a forming mold, wherein the feeding mechanism and the feeding mechanism are communicated through a connecting pipe, wherein at least two of the feeding mechanism, the connecting pipe, the feeding mechanism and the forming mold are It is equipped with a heating mechanism and/or a heat preservation mechanism, which is more conducive to the heating and heat preservation of the powder material, softening the powder with a relatively high hardness, and can achieve the same effect as the cold press molding batch, and the molding pressure can be reduced by 30% And it will not affect the molding efficiency, and the molding efficiency is high; and, compared with the prior art, the use of the mold can be greatly improved while achieving the same or higher saturation magnetic flux density Bs of the components Life and efficiency, reduce costs, and achieve mass production of components.

Therefore, the powder pressing device has a simple and compact structure, is easy to operate, and has the advantages of low molding pressure, high efficiency, high saturation magnetic induction intensity Bs of the magnetic components obtained by molding, good strength, less damage to the mold, and low production cost. , can be widely used in the manufacture of various magnetic components.

The magnetic element preparation system of the present application, including the powder pressing device, has all the features and advantages of the powder pressing device described above, and will not be repeated here.

It is to be understood that the foregoing general description and the following detailed description are exemplary only and do not limit the application.

Description of drawings

In order to more clearly illustrate the specific embodiments of the present application or the technical solutions in the prior art, the accompanying drawings that need to be used in the description of the specific embodiments or the prior art will be briefly introduced below. The drawings are some embodiments of the present application. For those of ordinary skill in the art, other drawings can also be obtained from these drawings without any creative effort.

1 is a schematic structural diagram of a powder pressing device provided by an embodiment of the application;

FIG. 2 is a schematic structural diagram of another powder pressing device provided in an embodiment of the present application.

icon:

1- Feeding mechanism;

2-connecting pipe;

3-Feeding mechanism;

4-forming mold; 41-upper; 42-mother; 43-lower; 401-cavity;

5- Stirring mechanism;

6 - Platform;

7- Heating mechanism;

71-first heating mechanism; 711-first heating element; 712-first temperature control component;

72-second heating mechanism; 721-second heating element; 722-second temperature control component;

8-Insulation mechanism;

81 - the first thermal insulation mechanism;

82 - the second heat preservation mechanism;

9-Powder material.

Detailed ways

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

In the description of this application, unless otherwise expressly specified and limited, the term "plurality" refers to two or more; the terms "connected", "fixed" and the like should be understood in a broad sense, for example, "connected" It may be a fixed connection, a detachable connection, an integral connection, or an electrical connection; it may be a direct connection or an indirect connection through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific situations.

In the description of this specification, it should be understood that the directional terms such as "upper", "lower", "inner", and "outer" described in the embodiments of the present application are described from the angles shown in the drawings, not It should be understood as a limitation on the embodiments of the present application. Also, in this context, it should also be understood that when an element is referred to as being "on" or "under" another element, it can not only be directly connected "on" or "under" the other element, but also Indirectly connected "on" or "under" another element through intervening elements. As used in the embodiments of this application and the appended claims, the singular forms "a," "the," and "the" are intended to include the plural forms as well, unless the context clearly dictates otherwise.

It should be understood that the term "and/or" used in this document is only an association relationship to describe the associated objects, indicating that there may be three kinds of relationships, for example, A and/or B, which may indicate that A exists alone, and A and B exist at the same time. B, there are three cases of B alone.

Unless otherwise defined or indicated, professional and scientific terms used herein have the same meanings as those familiar to those skilled in the art.

Those skilled in the art understand that, as mentioned in the background art, in order to improve the saturation magnetic flux density Bs of the soft magnetic composite material, the commonly adopted measures are to increase the tonnage of the press, directly increase the molding pressure, and there are serious mold losses and high costs. It is difficult to achieve mass production and other disadvantages.

In addition, in order to improve the saturation magnetic flux density Bs of the magnetic material, there is currently a method of heating the mold. For example, a mold heating molding process disclosed in the patent publication number CN 109878112A Transfer heat to the workpiece (component) in the cavity. However, the disadvantage of the existing heating method is that the heating of the workpiece is uneven, which will affect the hot pressing effect; in addition, the method of heating the mold needs to transfer the heat from the mold to the workpiece, which requires a long time, time-consuming, and molding. less efficient. For example, if the cold pressing efficiency is 20 pieces per minute, that is, one piece per 3 seconds, that is to say, the method of heating the mold, if you want to achieve the efficiency of cold pressing, it needs to be done in a short time of 3 seconds. It is currently difficult to heat the workpiece added into the mold cavity to the required temperature and the temperature is uniform. Therefore, based on the existing device structure or operation mode, in order to achieve the hot pressing effect, the efficiency of heating the mold cavity is greatly reduced. In general, if the size of the pressing element is considered, the molding efficiency of the heating mode to the mold is at least 20 times lower than that of the cold pressing method. It can be seen that, in the existing hot press forming method, to achieve the same effect as cold pressing, the forming efficiency is much lower than that of cold pressing.

Therefore, in order to overcome the imperfection of the existing technology, meet the increasingly high requirements of the market for magnetic materials, improve the saturation magnetic flux density Bs after the magnetic powder material is pressed and molded, and optimize the magnetic properties of the magnetic element, the embodiment of the present application The technical solution of the present invention provides a powder pressing device and a preparation system for a magnetic element. The device can improve the molding efficiency, reduce the molding pressure, and reach the mass production level, and the device has a simple structure and a very convenient operation mode.

In a specific embodiment, the present application will be further described in detail below with reference to the accompanying drawings.

Please refer to FIG. 1 and FIG. 2 , an embodiment of the present application provides a powder pressing device, including a feeding mechanism 1 , a feeding mechanism 3 and a molding die 4 ;

The feeding mechanism 1 is used to supply the powder material 9; the feeding mechanism 3 is communicated with the feeding mechanism 1 through the connecting pipe 2, and the feeding mechanism 3 is used to inject the powder material 9 into the molding die 4, and the molding die 4 is used to inject the powder material 9 pressed into elements;

Wherein, at least two of the feeding mechanism 1 , the connecting pipe 2 , the feeding mechanism 3 and the forming die 4 are provided with a heating mechanism 7 and/or a heat preservation mechanism 8 .

The powder pressing device can be used for pressing and forming of soft magnetic materials in powder state, and further can be used for pressing and forming of iron-based soft magnetic composite materials; of course, it can also be used for pressing and forming of other types of soft magnetic materials. The embodiment does not limit the specific type and source of the powder material.

In the powder pressing device, the feeding mechanism 1 can be used to supply or provide or store the powder material 9, and the discharge port of the feeding mechanism 1 can be connected with the inlet of the feeding mechanism 3 through the connecting pipe 2; the feeding mechanism 3 can use In injecting or adding the powder material 9 into the cavity 401 of the molding die 4, the outlet of the feeding mechanism 3 can be communicated with the cavity 401 of the molding die 4; the molding die 4 includes a cavity 401, also called a cavity, which is The space in the mold for forming components (components), the powder material 9 is placed in the mold cavity 401 and can be pressed into components.

It should be noted that the fact that at least two of the above-mentioned feeding mechanism 1, connecting pipe 2, feeding mechanism 3 and forming die 4 are provided with heating mechanism 7 and/or heat preservation mechanism 8 means that feeding mechanism 1, connecting pipe 2, Any two or more of the feeding mechanism 3 and the forming die 4 may be provided with a heating mechanism 7 and/or a heat preservation mechanism 8 . The heat preservation mechanism 7 and the heating mechanism 8 are arranged in various forms in the feeding mechanism 1 , the connecting pipe 2 , the feeding mechanism 3 and the forming die 4 . Exemplarily, a heating mechanism may be provided only in the feeding mechanism and the forming mold; alternatively, a heating mechanism may be provided in the feeding mechanism and the forming mold, and a heat preservation mechanism may be provided in the connecting pipe and the feeding mechanism; A heating mechanism is provided in the mechanism, the feeding mechanism and the forming mold; alternatively, a heating mechanism may be provided in the feeding mechanism, and a heat preservation mechanism may be provided in the connecting pipe, the feeding device and the forming mold. Certainly, the setting manners of the heat preservation mechanism and the heating mechanism may also be in various other forms, which will not be described in detail here.

Therefore, the powder pressing device adopts the method of hot pressing, and by providing a heating mechanism and/or a heat preservation mechanism in at least two of the feeding mechanism, the connecting pipe, the feeding mechanism and the molding die, it is more helpful to The heating and heat preservation of the powder material softens the powder with relatively high hardness, which can achieve the same effect as the cold-pressed batch, and the molding pressure can be reduced by about 30%; it will not affect the molding efficiency, and the molding efficiency is high; , compared with the prior art, while achieving the same or higher saturation magnetic flux density Bs of the components, the service life and efficiency of the mold can be greatly improved, the cost can be reduced, and the mass production of the components can be realized.

In order to further improve the molding efficiency and reach the mass production level, so that the Bs of the obtained molding element is higher, as shown in FIG. 1 or FIG. 2 , in some embodiments, both the feeding mechanism 1 and the molding die 4 are provided with a heating mechanism 7 . ;

Both the connecting pipe 2 and the feeding mechanism 3 are provided with a heat preservation mechanism 8 . In this way, the powder material 9 is first heated by the heating mechanism 7 provided in the feeding mechanism 1, and then enters the molding with the heating mechanism 7 through the connecting pipe 2 provided with the heat preservation mechanism 8 and the feeder 3 provided with the heat preservation mechanism 8. The cavity 401 of the mold 4 is helpful for heating and softening the powder material, and applying pressure to it in a heat preservation or preset state can form a high-density magnetic element such as a high-density magnetic core after compression molding. Further, the high-density magnetic core has high magnetic permeability, which helps to improve the magnetic performance of magnetic components.

The powder pressing device adopts the method of simultaneously heating the feeding mechanism 1 and the forming die 4 , and simultaneously maintaining the heat preservation of the connecting pipe 2 and the feeding mechanism 3 . Specifically, the powder material, such as the iron-based soft magnetic composite powder material, is heated to soften the powder by the setting of the heating mechanism. At the same time, a heat preservation mechanism is set on the connecting pipe and the feeding mechanism through which the heated powder flows, and the forming mold is heated. Heating can keep the mold cavity and the powder material at the same temperature, which can ensure that the temperature of the powder material remains unchanged when the powder material is added to the mold cavity, and ultimately does not affect the molding efficiency.

Therefore, the powder pressing device can heat the formed iron-based soft magnetic composite powder to soften the powder with relatively high hardness, and can achieve the same effect of cold pressing batches, and the molding pressure can be reduced by about 30%. While achieving the same or higher Bs of the components obtained by molding, the service life and efficiency of the mold are greatly improved, and the mass production of devices is realized.

Optionally, the above-mentioned connecting pipe 2 may be a hose, that is, the connecting pipe may be made of a soft material. This facilitates the connection between the feeding mechanism and the feeding mechanism and reduces costs.

Optionally, the material of the above-mentioned feeding mechanism 1 can be metal, and further can be stainless steel or a material with good thermal conductivity, which is helpful for heating the powder material, and can achieve the effect of continuously heating the powder material.

Optionally, the above-mentioned feeding mechanism 1 can be a conical or funnel-shaped structure, and its cross-sectional shape can be an inverted trapezoid, which facilitates feeding, feeding and circulation of powder materials.

Optionally, the above-mentioned feeding mechanism 3 may be a feeder, and the feeder may also include a conical or funnel-shaped structure, and its cross-sectional shape may be a regular trapezoid, which facilitates feeding and circulation of powder materials.

It should be understood that, in the embodiments of the present application, the specific shapes, structures or materials of the above-mentioned connecting pipe 2, feeding mechanism 1, and feeding mechanism 3 are not limited, which can be designed by those skilled in the art according to the actual situation, as long as the purpose of the present application is not met. Just create restrictions.

As shown in FIG. 1 or FIG. 2 , in some embodiments, the heating mechanism 7 includes a first heating mechanism 71 and a second heating mechanism 72 . The first heating mechanism 71 is provided in the feeding mechanism 1 , and the second heating mechanism 72 is provided in the feeding mechanism 1 . Forming Die 4.

By heating the feeding mechanism and the forming mold at the same time, the powder material is softened, the forming efficiency can be improved, and the forming pressure is small, the obtained components have high saturation magnetic flux density Bs, good strength, and the mold is not easily damaged, which can reduce the Cost of production.

Specifically, in some embodiments, the feeding mechanism 1 includes a hopper (feeding hopper), and the first heating mechanism 71 includes a first heating element 711 and a first temperature control component 712;

The first temperature control component 712 is used to monitor the temperature of the powder material 9 in the hopper, and the first heating element 711 is arranged on the side wall of the hopper. In this way, it is helpful to heat the powder material in the hopper, and through the setting of the temperature control component, the heating of the powder material in the hopper can be observed or regulated in real time.

Optionally, the first temperature control component can be electrically connected to the first heating element, or, a number of temperature detection points can be set in the hopper or on the side wall of the hopper, and probes for detecting temperature can be set at the temperature detection points. The control part can be electrically connected with the probe.

It should be noted that the embodiments of the present application do not limit the specific structures or types of the first temperature control component and the first heating element, which can adopt existing temperature monitoring or regulation devices and existing heating devices, and can be specifically selected from the field of the art. Technicians choose settings according to actual needs. For example, the first heating element may be a heating rod, but is not limited thereto, and may also be a heating belt, a heating plate, a heating tube, or the like.

Optionally, the first heating element 711 may include a plurality of heating rods, and the plurality of heating rods are evenly arranged on the side wall of the hopper at intervals, for example, at least one circle of heating rods may be provided on the outer side wall of the hopper. In this way, it is more helpful for the heating of the powder, which can improve the heating effect of the powder material in the hopper, and the heating is uniform.

The material of the above-mentioned hopper can be stainless steel or a material with good thermal conductivity. At least one circle of heating rods is arranged on the outer side wall of the hopper, which can continuously heat powder materials such as iron-based soft magnetic metal powder materials. The temperature is controlled above the softening temperature of the iron-based soft magnetic metal powder material.

Further, in order to better ensure the temperature uniformity of the powder material, as shown in FIG. 1 or FIG. 2 , in some embodiments, the powder pressing device further includes a stirring mechanism 5 , and at least part of the stirring mechanism 5 is arranged at the bottom of the hopper. internal.

Optionally, the stirring mechanism 5 includes a stirring rod, and may also include a driving structure for driving the stirring rod to rotate. Wherein, at least part of the stirring rod can be arranged inside the hopper for stirring the powder material, which can enhance heat transfer and mass transfer, so that the powder material is heated more uniformly, thereby helping to improve the magnetic element obtained by pressing and molding. Magnetic properties.

In some embodiments, as shown in FIG. 1 or FIG. 2 , the forming mold 4 includes an upper mold 41 , a female mold 42 and a lower mold 43 , a female mold 42 is provided below the upper mold 41 , and a lower mold 42 is provided below the female mold 42 . Type 43, the second heating mechanism 72 includes a second heating element 721 and a second temperature control component 722;

The second temperature control component 722 is used to monitor the temperature of the powder material 9 in the molding die 4 , and the second heating element 721 is disposed on the side wall of the mother mold 42 . In this way, it is helpful to heat the powder material in the molding die, and through the setting of the temperature control component, the heating of the powder material in the molding die can be observed or regulated in real time.

Optionally, the second temperature control component can be electrically connected to the second heating element, or, a number of temperature detection points can be set on the side wall of the mother type, and probes for detecting temperature can be set at the temperature detection points, and the second temperature control component Can be electrically connected to the probe.

It should be noted that the embodiments of the present application do not limit the specific structures or types of the second temperature control component and the second heating element, which can adopt existing temperature monitoring or regulation devices and existing heating devices, and can be specifically selected from the field of the art. Technicians choose settings according to actual needs. For example, the second heating element may be a heating rod, but is not limited thereto, and may also be a heating belt, a heating plate, a heating tube, or the like.

Optionally, the second heating element 722 may include a plurality of heating rods, and the plurality of heating rods are evenly arranged on the side wall of the mother mold 42 at intervals. Heating can keep the temperature in the mold cavity consistent with the temperature of the powder after heating.

Therefore, based on the first temperature control component, the first heating element, the stirring mechanism, the first temperature control component and the first heating element provided in the feeding mechanism and the molding mechanism, and the heat preservation mechanism provided in the connecting pipe and the feeding mechanism The setting can ensure that the hot pressing efficiency of the powder pressing device provided in the embodiment of the present application is the same as that of the traditional cold pressing, and on the basis, the saturation magnetic flux density Bs of the pressed magnetic element can be improved, the strength can be increased, and the molding pressure.

It should be noted that the above-mentioned molding die 4 includes an upper mold 41, a female mold 42 and a lower mold 43, a female mold 42 may be provided vertically below the upper mold 41, and a lower mold 43 may be provided vertically below the female mold 42; wherein, The upper mold 41 may include an upper punch, the female mold 42 is provided with a mold cavity 401 inside, and the lower mold 43 may include a lower punch. In addition, the powder pressing device may also include a platform 6 or an operating table, wherein the upper mold 41 is located above the platform 6 , and the mother mold 42 and the lower mold 43 are located below the platform 6 . During the working process, the powder material is placed in the die cavity of the mother mold, the upper punch presses down the powder material in the die cavity, and the lower end face of the powder material is squeezed by the lower punch to make it fully absorbed. Press down. In the embodiments of the present application, the illustrated composition or structure of the upper mold, the female mold, and the lower mold does not constitute a specific limitation on the molding die. For example, in other embodiments of the present application, the forming mold may include more or less devices, or combine some parts, or separate some parts, or arrange different parts, or the forming mold may form multiple parts at one time Small magnetic elements, or the forming mold can form magnetic elements of different shapes and structures.

The embodiments of the present application do not limit the specific shape and structure of the molding die, and accordingly, do not limit the specific shape and structure of the magnetic element obtained by pressing. First-class specific settings and adjust accordingly. Exemplarily, the prepared magnetic element may be a magnetic core, and the magnetic core may be a ring structure, and of course, a square structure with an inner hole or other similar structures.

In some embodiments, as shown in FIG. 1 or FIG. 2 , the heat preservation mechanism 8 includes a first heat preservation mechanism 81 and a second heat preservation mechanism 82 , the first heat preservation mechanism 81 is provided on the connecting pipe 2 , and the second heat preservation mechanism 82 is provided in the feeding Institution 3. In this way, the temperature of the powder material can be kept well at all times.

Specifically, in some embodiments, the first thermal insulation mechanism 81 includes a first thermal insulation layer, and the first thermal insulation layer covers the outer periphery of the connecting pipe 2 .

At least one layer of thermal insulation layer is coated on the outside of the connecting pipe, which can keep the powder material warm, prevent heat loss, and keep the temperature of the powder material well at all times, which helps to improve the molding efficiency and reduce the molding pressure. , and further increase the Bs of the magnetic element obtained by molding. The thermal insulation material of the first thermal insulation layer may be a lightweight thermal insulation material with a small thermal conductivity, for example, the thermal insulation material may be thermal insulation cotton or the like, and the specific type of the thermal insulation material is not limited in this embodiment of the present application.

Specifically, in some embodiments, the second heat preservation mechanism 82 includes a second heat preservation layer, and the second heat preservation layer covers the outer side wall of the feeding mechanism 3 .

At least one layer of insulation layer is coated on the outside of the feeding mechanism such as the feeder, which can keep the powder material warm, prevent heat loss, keep the temperature of the powder material at all times and well, and help improve the molding efficiency. The molding pressure is reduced, and the Bs of the magnetic element obtained by molding is increased. The thermal insulation material of the second thermal insulation layer may be a lightweight thermal insulation material with a small thermal conductivity, for example, the thermal insulation material may be thermal insulation cotton or the like, and the specific type of the thermal insulation material is not limited in this embodiment of the present application.

Specifically, the workflow of the above-mentioned powder pressing device may be:

Turn on the press motor switch;

Add powder material 9 such as iron-based soft magnetic composite powder into the feeding mechanism 1;

Turn on the first heating mechanism 71 provided in the feeding mechanism 1 and the second heating mechanism 72 provided in the molding die 4, and set the heating temperature through the first temperature control part 712 and the second temperature control part 722 respectively, and open the The stirring mechanism 5 of the feeding mechanism 1;

When the heating temperature rises to the set value, the heating mechanism automatically stops heating;

Incubate for about 10 minutes, and then activate the start pressing button to start pressing.

Among them, the first heating element 711 and the second heating element 721 can play the role of heating the powder material 9; the stirring mechanism 5 can play the role of making the temperature of the powder in the feeding mechanism 1 uniform; The thermal insulation layer of the feeding mechanism 3 can maintain the temperature of the powder flowing during the molding process; in addition, the second heating element 721 can keep the mother mold 42 at the same temperature as the powder in the hopper. In this way, it can be ensured that the powder in the mold cavity is kept at the same temperature at all times, and the practical effect of the present application is guaranteed to a large extent.

Based on the above description, it can be seen that the powder pressing device provided in the embodiment of the present application has the following main features: (1) Small molding pressure: Compared with cold pressing, the device can reduce the molding pressure under the condition that the density of the blank is equal to that of the blank. about 30%. (2) High forming efficiency: The device can achieve at least the same efficiency as traditional cold pressing. (3) The magnetic element obtained by molding has high saturation magnetic flux density Bs and good strength; in addition, the mold is not easily damaged, the production cost is low, etc., and the mass production level can be achieved.

Embodiments of the present application further provide a system for preparing a magnetic element, including the aforementioned powder pressing device.

Optionally, the magnetic element preparation system may further include a powder material preparation device for preparing the powder material.

Optionally, the magnetic element preparation system may further include a removal device or a post-processing device, the removal device is used to remove the molded magnetic element from the pressing device, and the post-processing device is used to perform post-processing on the magnetic element obtained by pressing. deal with.

It should be noted that, in the embodiments of the present application, the illustrated composition or structure of the magnetic element preparation system does not constitute a specific limitation on the magnetic element preparation system. For example, the preparation system of the magnetic element includes a powder pressing device, and may also include other devices or equipment known in the prior art, such as a preparation device for powder materials. The core of the preparation system includes the powder pressing device of the present application.

The preparation system of the magnetic element of the present invention has all the features and advantages of the above-mentioned koji powder pressing device, and will not be repeated here.

The above descriptions are only preferred embodiments of the present application, and are not intended to limit the present application. For those skilled in the art, the present application may have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of this application shall be included within the protection scope of this application.

It should be noted that a part of this patent application file contains content protected by copyright. Except for making copies of the patent files of the Patent Office or the contents of the recorded patent files, the copyright owner reserves the right to copyright.

Claims (10)

1. a powder pressing device, is characterized in that, comprises feeding mechanism, feeding mechanism and molding die; The feeding mechanism is used for supplying powder materials; the feeding mechanism is communicated with the feeding mechanism through a connecting pipe, and the feeding mechanism is used for injecting powder materials into the forming mold, and the forming mold is used for Press powder material into components; Wherein, at least two of the feeding mechanism, the connecting pipe, the feeding mechanism and the forming mold are provided with a heating mechanism and/or a heat preservation mechanism. 2 . The powder pressing device according to claim 1 , wherein the heating mechanism comprises a first heating mechanism and a second heating mechanism, the first heating mechanism is provided in the feeding mechanism, and the first heating mechanism is provided in the feeding mechanism. 3 . Two heating mechanisms are arranged on the forming mold. 3. The powder pressing device according to claim 2, wherein the feeding mechanism comprises a hopper, and the first heating mechanism comprises a first heating element and a first temperature control component; The first temperature control component is used for monitoring the temperature of the powder material in the hopper, and the first heating element is arranged on the side wall of the hopper. 4 . The powder pressing device according to claim 3 , wherein the powder pressing device further comprises a stirring mechanism, and at least part of the stirring mechanism is disposed inside the hopper. 5 . 5 . The powder pressing device according to claim 2 , wherein the forming die comprises an upper mold, a female mold and a lower mold, and the female mold is provided below the upper mold, and the female mold is arranged below the upper mold. The lower part is provided with the lower part, and the second heating mechanism includes a second heating element and a second temperature control part; The second temperature control component is used for monitoring the temperature of the powder material in the molding die, and the second heating element is arranged on the side wall of the mother mold. 6 . The powder pressing device according to claim 1 , wherein the thermal insulation mechanism comprises a first thermal insulation mechanism and a second thermal insulation mechanism, the first thermal insulation mechanism is arranged on the connecting pipe, and the second thermal insulation mechanism is arranged on the connecting pipe. 7 . The heat preservation mechanism is arranged on the feeding mechanism. 7 . The powder pressing device according to claim 6 , wherein the first thermal insulation mechanism comprises a first thermal insulation layer, and the first thermal insulation layer covers the outer periphery of the connecting pipe. 8 . 8 . The powder pressing device according to claim 6 , wherein the second heat preservation mechanism comprises a second heat preservation layer, and the second heat preservation layer covers the outer side wall of the feeding mechanism. 9 . 9. The powder pressing device according to any one of claims 1-8, wherein the feeding mechanism and the forming die are both provided with the heating mechanism; Both the connecting pipe and the feeding mechanism are provided with the heat preservation mechanism. 10 . A preparation system for a magnetic element, characterized by comprising the powder pressing device according to any one of claims 1 to 9 .

Images