KR102198636B1 - Sysrem for magnetic compaction method of producingferrite macnet and device - Google Patents

Abstract

The present invention relates to a method of manufacturing a ferrite magnet, capable of providing a ferrite magnet with an excellent magnetic force. According to the present invention, the method of manufacturing the ferrite magnet includes: a mixing step (S110); a drying step (S120); a forming step (S130); a heat treatment step (S140); a processing step (S150); and a packaging/discharging step (S160).

Description

Manufacturing method of ferrite magnet {Sysrem for magnetic compaction method of producingferrite macnet and device}

The present invention relates to a system for manufacturing a ferrite magnet, and in particular, a ferrite magnet having excellent magnetism through sequential heat treatment steps and processing of the formed magnet as well as preventing damage when the mixed raw materials are injected and molded when the formed magnet is discharged. It relates to a method of manufacturing a ferrite magnet for providing.

Ferrite sintered magnets are used in various applications such as various motors, generators, and speakers. As typical ferrite sintered magnets, Sr ferrite (SrFe12O19) and Ba ferrite (BaFe12O19) having a hexagonal M-type magnetoplumbite structure are known.

These ferrite sintered magnets are made of iron oxide and carbonates of strontium (Sr) or barium (Ba) as raw materials, and are manufactured relatively inexpensively by powder metallurgy.

In recent years, in accordance with environmental considerations and the like, high performance of ferrite sintered magnets has been demanded for the purpose of miniaturization, weight reduction, and high efficiency of components in electric parts for automobiles, parts for electric devices, and the like.

In particular, motors used in automotive electronic components have a high residual magnetic flux density Br (hereinafter simply referred to as "Br"), and a high coercive force HcJ (hereinafter, referred to as "Br") that does not deteriorate even when thinned. In order to manufacture ferrite (sintered) magnets which are the mainstream ferrite (sintered) magnets with only "HcJ"), a calcined body obtained by calcining and ferriticizing a mixture of raw materials at a predetermined mixing ratio is submicron sized To obtain a fine pulverized powder consisting of ferrite particles.

Then, the finely pulverized powder is compression-molded by a mold in a magnetic field (hereinafter, referred to as magnetic field molding) to obtain a molded body, and then the molded body is sintered to obtain a ferrite magnet.

The magnetic field molding process is roughly divided into a dry method in which the material is dried and then molded, and a wet method in which the material is formed into a slurry state.

In the case of magnetic field molding in a wet manner, if dehydration to remove moisture contained in the slurry is not performed reliably, cracks and the like occur in the molded body, and as a result, there is a problem that the product yield decreases.

And in the related art, there is a problem that the magnets discharged by the molding frame structure are damaged when the magnet material is injected into a molding machine and molded, and then the molded magnet is discharged.

In addition, when the molded magnet is heat-treated in a kiln, it is difficult to manufacture an excellent magnet due to a non-uniform temperature difference inside the kiln.

Patent Document 1: Japanese Patent Publication No. 1-54167 Patent Document 2: Japanese Patent Laid-Open No. 6-182728

The present invention has the following objects in manufacturing a ferrite magnet.

An object of the present invention is to prevent damage to a ferrite magnet by injecting a powdered magnetic material into a molding machine to smoothly discharge the molded magnet shape after molding.

An object of the present invention is to provide a ferrite magnet having excellent magnetic force by sequentially heat treating a ferrite magnet formed by a molding machine into a heat treatment means maintaining a uniform temperature.

An object of the present invention is to minimize waste of abrasive stone while processing the surface efficiently while processing the surface of a heat-treated magnet.

The present invention for achieving the above object is a mixing step of mixing the main raw material of a ferrite magnet to pulverize the mixed main raw material, wherein the pulverization is mixed through coarse pulverization, medium pulverization, and fine pulverization by a pulverizing means;

A drying step of drying the mixed main raw material through a drying furnace;

The raw material of the dried powder is molded by a molding means, the molding means is a supply hopper containing the raw material, and the molding pin is pressed down when the main raw material is put inside the molding die to form magnets of various shapes. And, a raw material supply kit for supplying powdered raw materials into the molding mold while performing a linear motion at the top of the molding mold, and discharging the formed magnet, and a second cylinder for raising and lowering the molding die at the lower end of the molding die. A molding step of forming a fine powder raw material into a predetermined shape;

The magnet shape formed in the forming step is heat-treated at high temperature by a heat treatment means and transferred to low temperature heat to gradually cool it, but the heat treatment means is provided with an input port through which a cart containing ferrite magnets enters, The other side is a heat treatment furnace provided with an outlet through which the heat-treated cart is discharged, and a heating pipe is provided inside the heat treatment furnace, and the heating pipe is made to operate by a heating means, and external air is supplied to one side of the heat treatment. A heat treatment step of performing heat treatment by a heat treatment furnace provided with an air injection nozzle for supplying into the heat treatment furnace at a constant rate, and a circulation fan for circulating temperature inside the heat treatment furnace and injected air;

Processing the outer periphery of the heat-treated ferrite magnet to a processing means, wherein the processing means includes a magnet supply line for sequentially supplying magnets, a magnet winding roll having a plurality of winding holes so that the magnet is wound, and the magnet winding A processing step of processing the surface and the outer periphery of the magnet from a polishing blade for grinding the outer periphery of the magnet, and at one end of the roll is provided with a surface grinding stone for polishing the side of the seat;

It features a package discharging step of packing and discharging the ferrite magnet, which has been processed, by a packing machine.

The raw material supply kit of the present invention is characterized in that it is connected to a supply hopper by a hose to supply the main raw material to a molding mold or to push and pull out a magnet that has been formed.

In the present invention, a third link, a second link, and a first link are connected to the rear of the raw material supply kit, and one side of the second link is provided to be interlocked with the third link, and the other side is fixedly installed by a hinge, One side of the first link is installed interlocking with the second link, and the other side is interlocked with the first cylinder, and is characterized in that it is made to move linearly at the top of the molding frame by the operation of the first cylinder.

The molding frame of the present invention has a molding body and a frame body built into the molding body, and the frame body is divided by a splitting piece to form a mold block receiving part,

In the frame block receiving portion, each frame block having a pull-out guide hole that is downwardly negotiated is built to form a molding hole, and at the lower end of the molding body, a base having a protrusion leading into the molding hole and a pull-out pin inserted into the pull-out guide hole. It characterized in that it is provided.

Further, the frame block constituting the molding mold is characterized in that the mold block is opened by the withdrawal pin as the molding body descends when the molding die is lowered by the operation of the second cylinder.

On the other hand, the cart is characterized in that a vent hole for efficient heat circulation is formed on the bottom surface and on both side walls, and an uneven portion for heat circulation inside the cart is further provided.

The outer circumferential polishing blade of the present invention includes a polishing blade body having a polishing stone assembly groove, an outer circumferential polishing stone assembled with the polishing stone assembly groove, and a key that is assembled on the side of the outer circumferential polishing stone to prevent the polishing stone from rotating in one direction, It is characterized in that it is provided as a stop key for controlling the key.

According to the present invention as described above, a ferrite magnet having excellent anisotropy and molding density can be obtained by putting a ferrite magnet formed by a molding machine into a heat treatment means maintaining a uniform temperature and processing the surface efficiently. It works.

1 to 2 are views for explaining a molding means for molding a ferrite magnet according to an embodiment of the present invention.
Figure 3 is a view for explaining the operating state of the ferrite magnet forming means of the present invention.
Figures 4 to 5 are views for explaining the structure of the mold of the ferrite magnet forming means of the present invention.
6 to 8 are views for explaining the operating relationship of the molding frame.
9 to 11 are views for explaining a heat treatment means for heat treatment of a molded ferrite magnet according to an embodiment of the present invention.
12 to 13 are views for explaining a cart structure in which a ferrite magnet is contained.
14 to 15 are views for explaining a means for processing the surface of a ferrite magnet heat-treated by a heat treatment means.
16 is a diagram for explaining the structure of a work grinding blade for ferrite processing.

Hereinafter, a method of manufacturing a ferrite magnet according to an embodiment of the present invention will be described with reference to the accompanying drawings.

In the following description of the present invention, if it is determined that a detailed description of a related known function or configuration may unnecessarily obscure the subject matter of the present invention, a detailed description thereof will be omitted. In addition, terms to be described later are terms set in consideration of functions in the present invention, and these terms may vary according to the intention or custom of a producer producing a product, and the definitions of terms should be made based on the contents throughout the present specification.

(Example)

A method of manufacturing a ferrite magnet according to an embodiment of the present invention includes a mixing step of mixing the main raw materials of the ferrite magnet; A grinding step of sequentially coarse grinding, medium grinding, and fine grinding of the mixed main raw materials by means of grinding means; A drying step of drying the pulverized main raw material through a drying furnace; A molding step of storing the dried raw material in the supply hopper and sequentially inputting it into a molding mold and pressing the inputted raw material to form; A heat treatment step of placing the formed ferrite magnet on a cart and sequentially moving it to a heat treatment means for heat treatment; A processing step of processing the surface of the outer periphery of the ferrite magnet on which the heat treatment has been completed by a processing means; It consists of a package discharging step of discharging the processed ferrite magnet by packing.

The forming step (S130) includes a supply step of supplying the raw material stored in the supply hopper 134 to the forming hole 144 of the forming mold 140 through the raw material supply kit 130,

A pressing step of pressing the powdered raw material injected into the forming hole 144 with a forming pin 120 to pressurize into a predetermined shape,

It consists of a discharge step of automatically discharging the pressurized magnet from the forming hole and discharging it to the outside.

In the mixing step, the main raw material is mixed through several mixing processes by injecting an appropriate amount of raw material into the mixer.

In the pulverization step, the raw material that has been mixed at a certain ratio is coarsely pulverized in step 1, heavy pulverization is performed in step 2, and pulverization is performed through three steps of fine pulverization in step 3.

As described above, the fine powder that has been completed up to the pulverization step is formed by a molding means according to the manufacturing apparatus provided in the present invention, is heat treated by a heat treatment means, and the surface is processed by a processing means and then packaged and shipped. .

First, the accompanying drawings FIGS. 1 to 8 are views for explaining the specific configuration of the forming means 100 in the magnet manufacturing apparatus of the present invention, and FIGS. 9 to 13 are views illustrating the specific configuration of the heat treatment means 200, FIG. 14 to 16 are views for explaining a specific configuration of the processing means 300.

As shown in the accompanying drawings Figures 1 to 8, the molding means 100 according to the manufacturing apparatus of the present invention looks at, the supply hopper containing the raw materials manufactured through the mixing step, the grinding step and the drying step of the main raw material of the ferrite magnet 134 is provided, and when the main raw material is input inside the molding die 110, the molding pin 120 is provided as a molding mold 140 for forming magnets of various shapes by downward pressure.

A raw material supply kit 130 is provided for supplying powdered raw materials into the molding mold 140 while performing a linear motion at the top of the molding mold, and discharging the formed magnet.

The shaping pin 120 is vertically lowered by a power device (not shown) to pressurize the main raw material of the powdered powder injected into the mold, and then lifted back to its original state.

The molding die 110 is installed to be interlocked with the second cylinder 150 provided at the lower end so that the molding pin 120 descends and descends by the operation of the second cylinder 150 when it rises after molding.

At this time, when the molding die 110 is lowered, the press-molded molding magnet is discharged from the molding mold 140, and when the raw material supply kit 130 is moved forward, it is pushed to the front 132 of the raw material supply kit and discharged to the front. .

The raw material supply kit 130 is connected to the supply hopper 134 by a hose 134a to supply the main raw material to the forming mold 140 or push the formed magnet to be pulled out.

In addition, a third link 136c, a second link 136b, and a first link 136a are connected to the rear of the raw material supply kit 130, and one side of the second link is a third link 136c. It is provided to be interlocked with, the other side is fixedly installed by a hinge (137).

And one side of the first link (136a) is installed interlocking with the second link (136b), and the other side is installed interlocking with the first cylinder (135), and linear motion from the top of the forming frame 140 by the operation of the first cylinder. Is made to do.

That is, when the cylinder rod moves forward by the operation of the first cylinder 135, the first link 136a moves forward, and at this time, the second link 136b rotates with the hinge 137 as a starting point.

In addition, the third link 136c connected to the second link 136b is pushed forward to move the raw material supply kit 130 forward.

In the raw material supply kit 130 moved forward as described above, after injecting the main raw material contained in the inner 131 into the forming hole 144, the supply kit 130 is returned to the original position by a cylinder operating in the reverse direction.

In this way, when the raw material is injected into the shaping hole 144, the shaping pin 140 is lowered to press-form the raw material of the powder contained in the shaping hole 144 and rise, and at this time, the shaping pin 140 rises. At this time, the second cylinder 150 lowers the molding die 110, and at this time, the molding mold 140 also descends.

When the mold 140 is lowered, the mold block 143 is simultaneously lowered while the withdrawal guide hole 143a is intercepted by the withdrawal pin 142b so that the mold block 143 is opened to both sides, and the formed magnet is protruded. It is lifted by 142a) and removed from the forming hole 144, at this time, while the raw material ball kit is operated in one direction, the front side of the supply kit 132 pushes the raised magnet forward, and repetitive molding is performed in a stock method.

On the other hand, the molding frame 140 has a molding body 141 and a frame body 145 that is built into the molding body, and the frame body 145 is divided by a splitting piece 145a to form a frame block. A receiving portion 145b is formed.

In addition, in the frame block receiving portion 145b, a frame block 143 having a pull-out guide hole 143a that is vertically narrowed is each built-in to form a forming hole 144, and a forming hole 144 is formed at the lower end of the forming body 141. It is provided with a base 142 having a protrusion 142a leading into the hole 144 and a lead pin 142b inserted into the withdrawal guide hole 143a.

At this time, the frame block 143 constituting the molding frame 140 is pulled out by the molding body 141 descending when the molding die 110 is lowered by the operation of the second cylinder 150 It is made to be opened by the pin (142b).

As shown in the accompanying drawings 9 to 13, the heat treatment means 200 of the present invention is

One side is provided with an inlet 218 into which a cart containing ferrite magnets enters, and the other side has a heat treatment furnace 210 provided with an outlet 219 through which the heat-treated cart is discharged, and a heating pipe inside the heat treatment furnace ( 211) is provided.

In addition, the heating pipe is made to operate by a heating means 212, and an air injection nozzle 215 is provided on one side of the heat treatment to constantly supply external air into the heat treatment furnace.

In addition, a circulation fan 214 for circulating the injected air and temperature inside the heat treatment furnace is provided inside the heat treatment furnace.

On the other hand, the heat treatment furnace 210 is heat-treated with high-temperature heat, but it is preferable that the input port 218 is initially made of low-temperature, medium-temperature, high-temperature, medium-temperature, and low-temperature heat.

It is preferable to avoid rapid high-temperature heat treatment and rapid cooling as the molded magnet is cracked and cracked if the ferrite magnet is heat treated from room temperature rapidly.

In order to solve the above-described problem, the temperature of the heat treatment furnace 210 is provided on the heating means 212 and the air supplied to the heat treatment furnace, the circulation fan 213 for circulating the air, and the upper portion of each heat treatment furnace. It is achieved by adjusting the first and second discharge paths 216 and 217 to be discharged.

For example, an embodiment of the present invention will be described a heat treatment furnace consisting of three steps.

First, a case where the internal temperature of the first furnace 210a is "high", the internal temperature of the second furnace 210b is "medium" and the temperature of the third furnace is "low" will be described.

When the temperature of the first furnace 210a is maintained at 1000°C, the heating means heats the heating pipe while the temperature is set to about 800°C.

In addition, external air is supplied from the air injection nozzle 215 to a minimum, and the circulation fan 214 provided inside the first furnace 210a is operated to circulate the incoming air and the temperature of the first furnace. The temperature of the furnace is maintained at 1000°C, and heat treatment of the magnet is performed.

And the second furnace (210b) is maintained at a lower temperature than the internal temperature of the first furnace (210a), which is, when the temperature of the heating means is set to approximately 800 ℃, heat is generated from the heating pipe and the second furnace (210b) The temperature of is maintained.

In addition, in order to prevent the temperature of the second furnace 210b from rising rapidly, a first discharge passage 216 for discharging the heat of the second furnace is provided above the second furnace 210b.

At this time, it is preferable that the flue of the first discharge path 216 is provided long to the outside in order to prevent rapid heat emission. By providing the flue to be discharged to the outside for a long time as described above, the heat of the second furnace 210b is prevented from lowering the rapid low temperature.

In addition, there is no separate heating means on the upper portion of the third furnace 210c, and it is possible to maintain a low-temperature heat. That is, the first furnace, the second furnace, and the third furnace are formed to communicate with each other, so that the heat of the first furnace and the second furnace moves to the third furnace, thereby generating low-temperature heat.

In addition, the heat of the third furnace 210c is discharged to the outside through the second discharge passage 217 provided thereon.

As described above, the heat treatment furnace 210 of the present invention is configured to heat-treat a ferrite magnet by maintaining high temperature heat at 1000° C. or higher, and to perform heat treatment while gradually moving to a low temperature, thereby manufacturing a ferrite magnet having an excellent magnet.

On the other hand, the cart 240 in which the ferrite magnet is contained has ventilation holes 242 and 243 for efficient heat circulation on the bottom surface and both side walls, and an uneven portion 241 for heat circulation inside the cart It is equipped.

As described above, by forming the vent holes 242 and 243 on the bottom and both sides of the cart 240 and forming the uneven portions 241 therein, the surface of the magnet contained therein is evenly heat treated and gradually cooled. By being made, a magnet having an excellent magnetic material is manufactured.

Since the conventional cart 240 has a flat bottom surface and does not properly circulate heat, heat treatment of the magnet placed at the bottom is not properly performed, resulting in a high defect rate.

However, in the cart 240 of the present invention, the bottom surface is formed of the uneven portion 241, and the high-temperature heat is uniformly heat treated through the uneven portion to the magnet contained in the bottom surface, so that the defect rate can be minimized.

In addition, the top of the cart 240 is raised in double or triple to be transferred to the heat treatment furnace 210. At this time, ventilation holes 242 are formed on both sides and bottom surfaces of the cart 240 to heat through the ventilation holes. Since this is purified, heat treatment of a large amount of magnets is performed.

On the other hand, the transport of the cart 240 is made by a moving means (230).

The moving means 230 is preferably applied to the whole of the heat treatment means 200.

That is, the inlet port 218 into which the cart 240 is inserted, the discharge unit 219 through which the cart is discharged, and the transfer means 230 are provided throughout the rail R through which the cart is transferred.

The transfer means 230 is provided with a screw 233 in the longitudinal direction, the screw 233 is made to be interlocked with the motor 231, which is a power means provided on one side, and a push rod that is transferred along the screw 233 (232) is provided.

It is preferable that the upper end of the push rod 232 protrudes to the upper portion of the rail R.

In addition, the transfer means 230 is configured to transfer the cart 240 while gradually operating in a continuous driving state rather than a stopped state.

That is, this is to prevent the cart 240 and the rail from being pressed against each other by the discharged impurities due to the generation of impurities during the heat treatment of the magnet.

14 to 16, the surface of the magnet and the outer periphery of the magnet are polished by the processing means 300.

The means for processing the surface of the magnet include a magnet supply line 311 for sequentially supplying the magnet, a magnetic winding roll 322 having a plurality of winding holes 321 so that the magnet is wound, and a surface polishing stone for processing the surface of the magnet. 323 is provided to polish the surface of the magnet.

At this time, the magnet supply line 311 is provided on the side of the magnet winding roll 322, and a push rod (not shown) for inserting the supplied magnet into the winding hole 321 is provided on the lower side of the magnet supply line 311 do.

In addition, a sensor 322 is provided at the side of the winding hole 321 of the magnetic winding roll 322 to identify whether the magnet is wound.

That is, in the state where the magnet is supplied to the magnet winding roll 322, a push rod (not shown) provided on the lower side pushes the magnet and transfers it to the winding hole 321, and then the magnetic winding roll 320 rotates to take the next winding. The hole 321 is located.

As described above, when winding of the magnet into each of the winding holes 321 is completed, the magnetic winding roll 320 is rotated, and the surface polishing stone 323 is in close contact with each other to polish the magnet.

And the outer periphery of the magnet is processed by the outer periphery polishing blade 330.

The outer circumferential polishing blade 330 is assembled with a polishing blade body 330a having a polishing stone assembly groove 330b so that the polishing stone is assembled, and the polishing stone assembly groove 330b to polish the outer circumference of the magnet ( 334, a key 332 assembled on the side of the outer circumferential grinding stone 334 to prevent the grinding stone from rotating in one direction, and a stop key 333 for controlling the key 332.

And the side of the key 332 is further provided with a handle 331 that can be manually rotated by the operator.

That is, when the magnet is input to polish the outer periphery, the outer periphery grinding stone 334 is limited in rotation in the opposite direction to the rotational direction by the interception of the key 332.

And when a part of the outer circumferential grinding stone 334 is worn, the stopping key 333 that regulates the key 332 is removed, or when the handle 331 is rotated in the forward direction, the stopping key 333 is removed from the key 332 While being able to rotate the outer peripheral grinding stone 334.

For example, when the magnet is seated on the outer circumferential polishing stone 334 and rotated to the right, the key 332 integrally formed with the outer circumferential polishing stone 334 is intercepted by the intermittent key 333. This rotation to the right is regulated.

When the outer circumferential polishing is continuously performed as described above, when the outer circumferential polishing stone 334 is worn out and the polishing is not properly performed, the control key 333 to control the key 332 by rotating the handle 331 to the left. ) Is rotated to the left around the hinge, and the key 332 is rotated.

As described above, the key 332 is released from the cracking key 333 and rotates while the worn portion is rotated in the same direction, and a new polishing portion can be positioned.

As described above, the outer periphery of the magnet can be continuously polished by positioning a new part.

Conventionally, if a new polishing stone is needed after polishing, the entire outer circumferential polishing blade 330 is replaced or the outer circumferential polishing blade 330 is disassembled, and then the block supporting the polishing stone is removed, and the polishing stone is replaced, and the polishing blade is installed again. Although cumbersome to use occurred, in the present invention, by rotating the handle 331 to position and reuse the unworn abrasive stone, consumption of the abrasive stone can be minimized.

Hereinafter, the operation of the apparatus for manufacturing a ferrite magnet according to the present invention will be described.

First, the raw material of the ferrite magnet mixed and pulverized is supplied to the molding mold 140 in the following order while immersed in the supply hopper 134.

The first to third links 136a, 136b, and 136c are operated by the front and rear reciprocation of the first cylinder 135, and at this time, the raw material supply kit 130 is front and rear at the top of the forming die 110. The linear reciprocating movement is repeatedly performed.

In addition, the forming pin 120 is also raised and lowered to press-form the raw material injected into the forming mold 140 to form a circular or rectangular shape of the raw material of the powder.

At this time, it is preferable that the raw material supply kit 130 moves forward and inputs the raw material, and then returns to the original state to the rear and the molding pin 120 descends to perform pressure molding.

And the molding die 110 is lowered and raised by the operation of the second cylinder 150, but after the molding pin 120 is press-molded, the second cylinder 150 is operated when the molding die 110 is raised. It is desirable to lower it.

In addition, it is preferable that the molded magnet is discharged after the molding die 110 is lowered and the raw material supply kit 130 moves forward to push the molded magnet and simultaneously supply the raw material into the mold 140.

After the raw material is input and molded by the repetitive operation as described above, the magnets having various shapes are first molded by discharging the molded magnet.

It is preferable that the magnet formed in this way is heat treated by the heat treatment means 200. That is, the molded magnet is put in the cart 240 and put into the inlet 218 of the heat treatment means 200 for heat treatment, but the cart 240 may be put into a single input or loaded in one to three stages.

And it is preferable that the cart 240 is sequentially inputted by the transfer means 230. It is heat-treated by passing through the cart heat treatment furnace 210 to be input as described above, and it is preferable that heat treatment is performed in the heat treatment furnace 210 for at least 12 hours to 24 hours.

In addition, the heat treatment furnace 210 is preferably maintained at low temperature in the input portion and the discharge portion, and the first furnace 210a is maintained at a high temperature (approximately 1000°C or higher), and the lower temperature is maintained from the second furnace to the third furnace. It is preferable to cool the magnets that have been heat-treated at high temperatures by gradually moving them to low temperatures.

The first furnace 210a maintains high temperature heat by the heating pipe 211, and maintains the high temperature by circulating the heated heat inside the air introduced through the air injection nozzle 215, and provided at the top It is preferable to maintain the high temperature heat through the circulation fan 213.

The magnet passing through the first furnace 210a passes through the second furnace 210b and the third furnace, and is gradually cooled as it is discharged to the discharge unit 219.

At this time, since the cart is continuously transferred while maintaining a constant speed per minute without being stopped by the transfer means 230, a phenomenon in which the cart and the rail are adhered by impurities generated in the heat treatment occurs.

In this way, the heat-treated magnet is polished to the surface and the outer periphery by the processing means 300.

That is, the magnet supplied through the magnet supply line 311 is sequentially supplied to the winding hole 321 of the magnetic winding roll 320, which is sensed by the sensor 322. When the winding of the magnet in the winding hole is completed in this way, the magnet winding roll 320 is rotated, and the surface of the magnet is polished by the surface polishing stone 323 provided on the side.

The outer periphery of the magnet on which the surface of the magnet has been polished is polished by the outer periphery polishing blade 330.

That is, the magnet is supplied to the outer circumferential polishing blade 330 to rotate the outer circumference of the magnet while rotating in one direction, and the polishing stone 334 is prevented from being rotated by the interception of the key 332 and the stopping key 333 Efficient polishing is achieved.

And when the outer circumferential polishing stone 334 is worn by repeated polishing, the handle 331 is held and rotated to the left to position the non-worn polishing stone portion to perform polishing.

As described above, the magnet formed by the molding means 100 is heat-treated by the heat treatment means 200, and the ferrite magnet processed by the processing means 300 is packaged and shipped through the packaging step.

As described above, specific embodiments of the present invention have been described.

However, the spirit and scope of the present invention is not particularly limited to these specific embodiments, and various modifications and variations are possible within the scope of not changing the subject matter of the present invention. Anyone who has a must understand.

Therefore, the above-described embodiments are provided to completely inform the scope of the invention to those of ordinary skill in the technical field to which the present invention pertains, and should be understood as illustrative and non-limiting in all respects. Is only defined by the scope of the claims.

100: molding means 110: molding die
120: forming pin 140: forming frame
141: molding body 142a: protrusion
142b: draw pin 143: frame block
143a: withdrawal guide hole 144: forming hole
200: heat treatment means 210: heat treatment furnace
240: cart 241: uneven portion
300: processing means 311: magnet supply line
320: magnetic winding roll 321: magnetic winding hole
323: surface polishing stone 330: outer peripheral edge polishing blade
331: handle 332: key
333: stop key 334: outer peripheral grinding stone

Claims (4)

A mixing step (S110) in which the main raw materials of the ferrite magnet are mixed and the mixed main raw materials are pulverized, and the pulverization is mixed through coarse pulverization, medium pulverization and fine pulverization by a pulverizing means;
Drying step (S120) of drying the main raw material pulverized into finely divided and mixed through a drying furnace;
The raw material of the powder that has been dried is molded by the molding means 100, and the molding means 100 includes a supply hopper 134 containing the raw material, and a frame body 145 that is built into the molding body 141 Doedoe, the frame body 145 is divided by the splitting piece (145a) to form a frame block receiving portion (145b), the frame block receiving portion (145b) has a draw-out guide hole (143a) that is downwardly negotiated. Each of the mold blocks 143 are embedded to form a forming hole 144, and at the lower end of the forming body 141, a protrusion 142a leading to the forming hole 144 and the drawing guide hole 143a are inserted A mold 140 provided with a base 142 having a pull-out pin 142b,
The powder raw material is supplied into the molding mold 140 while performing a linear motion at the top of the molding mold. The raw material supply kit 130 is connected to the supply hopper 134 by a hose 134a to form the main raw material. The supplied or molded magnet is pushed out to 140, but connected to the rear of the raw material supply kit 130 by a third link (136c), a second link (136b), and a first link (136a) However, one side of the second link is provided to be interlocked with the third link 136c, the other side is fixedly installed by a hinge 137, and one side of the first link 136a is interlocked with the second link 136b It is installed and the other side is interlocked with the first cylinder 135 to make a linear motion at the top of the mold 140 by the operation of the first cylinder, and the raw material supply kit 130 to discharge the formed magnet, and the molding A molding step (S130) of forming a fine powder raw material into a predetermined shape by providing a second cylinder 150 for raising and lowering the molding die 110 at the lower end of the die 110;
The magnet shape formed in the forming step (S130) is heat-treated at a high temperature by a heat treatment unit 200 and is transferred to low temperature heat to gradually cool it, but the heat treatment unit 200 includes a ferrite magnet on one side. An inlet port 218 into which the cart enters is provided, and the other side has a heat treatment furnace 210 having an outlet 219 through which the heat-treated cart is discharged, and a heating pipe 211 inside the heat treatment furnace, The heating pipe is made to be operated by the heating means 212, and an air injection nozzle 215 for supplying external air into the heat treatment furnace is provided on one side of the heat treatment, and the injected air and A heat treatment step (S140) of performing heat treatment by a heat treatment furnace 210 equipped with a circulation fan 214 for circulating the temperature inside the heat treatment furnace;
Processing the outer periphery of the heat-treated ferrite magnet to the processing means 300, the processing means 300 is a magnet supply line 311 for sequentially supplying the magnet, and a plurality of winding holes ( A magnetic winding roll 322 having a 321), and a surface grinding stone 323 for polishing the side of the seat is provided on the side of the magnetic winding roll 322, and a polishing blade for polishing the outer periphery of the magnet ( Processing step (S150) of processing the surface and the outer periphery of the magnet from (330);
A method of manufacturing a ferrite magnet, comprising: a packing discharging step (S160) of packing and discharging the processed ferrite magnet by a packing machine. delete delete The method of claim 1,
The outer peripheral grinding blade 330 of the processing means 300,
An abrasive blade body 330a having an abrasive stone assembly groove 330b, an outer peripheral abrasive stone 334 assembled with the abrasive stone assembly groove 330b, and a side of the outer peripheral abrasive stone 334 are assembled so that the abrasive stone rotates in one direction A method of manufacturing a ferrite magnet, characterized in that it is provided with a key (332) to prevent the key (332) and a stop key (333) to regulate the key (332).

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