JPH06290849A - Device for manufacturing multi-layer brush and manufacture thereof - Google Patents

Abstract

PURPOSE:To obtain a method and a device for manufacturing multilayer brush, in which after-treatment such as cutting is eliminated and which can eliminate the waste of material to manufacture a brush at a low cost without changing a conventional process large. CONSTITUTION:A molding dies 10, horizontal punches 12, 14, a lower punch 16 and an upper slide plate 18 form a molding space 40 (40a, 40b). A raw material powder partitioning plate 20 is arranged in the inclining direction in this molding space 40. Two kinds of raw material powder thrown by feeders 30, 32 is extruded in the horizontal direction by the horizontal punches 12, 14 to fill the molding spaces 40a, 40b with each raw material powder. Thereafter, the raw material powder partitioning plate 20 is drawn, and pushed by at least one of the punches 12, 14, 16 to pressurize two kinds of raw material powder for fitting, and a two-layer brush is thereby manufactured.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus and method for manufacturing a multi-layer brush in which raw material powders of two or more different materials are laminated.

[0002]

2. Description of the Related Art Generally, a DC motor, a DC generator or the like is constructed so that any commutator is short-circuited with a brush to perform rectification. However, due to the inductance of the armature coil or the like, the change in current during rectification is extremely delayed, and the change in current becomes large at the end of rectification, so a large reactance voltage is generated due to the inductance of the short-circuit coil. This causes a spark discharge between the brush and the commutator, roughening the commutator surface and forming an uneven surface. Therefore, the amount of wear of the brush device increases, the life of the brush device decreases significantly, and the vibration noise of the brush itself increases.

In particular, if a high-performance magnet is used and the thickness of the magnet is reduced in order to reduce the size of the motor, the distance between the armature and the stator yoke is reduced. For this reason, the magnetic resistance of the armature is reduced, the inductance of the short-circuit coil is increased, and the above-mentioned problem becomes more prominent.

For this reason, various methods for performing non-spark rectification have been conventionally used. As a typical one of them, the proposal disclosed in Japanese Patent Laid-Open No. 4-46546 is known. In this proposal, the brush front end is made of low resistance material,
The rear end is made of a high resistance material to reduce the generation of sparks.

Further, as a method for manufacturing a two-layer brush of this type, Japanese Patent Laid-Open Nos. 2-86081 and 2-860 are known.
The proposal disclosed in Japanese Patent Publication No. 83 is known. In these proposals, two layers are stacked and filled in a forming die.
A two-layer brush is manufactured by pressing raw material powders or brushes of various types with upper and lower punches.

[0006]

However, in the above-described conventional two-layer brush, the commutation characteristics do not approach the ideal commutation curve depending on the rotor rotation position, and especially the boundary between the low resistance material and the high resistance material is used. However, there is a drawback in that it is difficult to completely suppress the generation of sparks because the current changes rapidly. Therefore, the present applicant has proposed a multi-layer brush that does not have such a defect (Japanese Patent Application No. 4-23).
No. 5231 "Brush device").

FIG. 7 is a perspective view showing the structure of a two-layer brush proposed by the present applicant. This two-layer brush 100
First layer 102 bounded by one diagonal of square cross section
And a second layer 104. First layer 102
Is a low resistance portion formed so that the commutator contact surface is gradually narrowed from the upstream side to the downstream side in the rotor rotation direction. The second layer 104 is a high resistance part formed so that the commutator contact surface gradually widens from the upstream side to the downstream side in the rotor rotation direction. FIG. 8A is a diagram showing an assembled state of the two-layer brush shown in FIG. 7. Armature 11
A state in which the two-layer brush 100 is vertically assembled with respect to the rotation direction of 0 is shown. Further, FIG. 8B is a view showing a cross section taken along the line AA in FIG. 8A, in which the first layer 102 becomes gradually narrower from the upstream side to the downstream side in the rotation direction,
The second layer 104, on the contrary, is shown to be wider.

By using such a two-layer brush 100, the brush resistance changes smoothly with the progress of rectification, and no sudden current change occurs during the entire rectification period, so that no spark is generated. Good rectification can be performed.

If the two-layer brush 100 is to be manufactured by the manufacturing method disclosed in Japanese Patent Laid-Open No. 2-86083, the two-layer brush is pressed by the upper and lower punches and has a boundary surface parallel to the upper and lower surfaces. Since the post-processing such as cutting is required after manufacturing once, there is a problem that it takes time and labor, the manufacturing time becomes long, and the material is wasted, resulting in high cost.

FIG. 9 shows a boundary surface 2 parallel to the upper and lower surfaces.
2 having a boundary surface inclined from the layer brush to the upper and lower surfaces
It is a figure which shows the state which cuts out the layer brush 100. By removing the corners of the brush, the two-layer brush 100 is cut out, and the removed corners are completely wasted, and this amount directly increases the cost. In addition, the labor and time required for this deletion will be added.

Further, by expanding the above-mentioned two-layer brush 100 for one-way rotation, it is possible to make a three-layer brush for two-way rotation.

FIG. 10 is a perspective view showing the structure of a three-layer brush proposed by the present applicant. This three-layer brush 120
Is a triangular prism-shaped first layer 122 provided on the upstream side of the commutator so that the commutator contact surface becomes gradually narrower from the upstream side to the downstream side of the commutator normal rotation direction, and the commutator contact surface is Commutator second triangular prism shape provided on the downstream side in the forward direction so as to gradually narrow from the downstream side to the upstream side in the forward direction.
Layer 124 and these first and second layers 122, 124
Triangular prism-shaped third layer 1 formed so as to be located between
And 26. First and second layers 122, 12
4 is a low resistance part, and the 3rd layer 126 is a high resistance part.

By using such a three-layer brush 120, when the rotor rotates in the normal direction, the first layer 122 is mainly used.
A current flows through the commutator so as to cancel the short-circuit current of the armature coil through, and when the rotor reverses, a current flows through the commutator mainly through the second layer 124 so as to cancel the short-circuit current of the armature coil. Because of the flow, rectification ends at a relatively early stage in either forward or reverse rotation.
In addition, since the brush resistance changes smoothly with the progress of rectification, a sudden change in current does not occur during the entire rectification period, and good rectification without sparks can be performed.

By the way, the above-mentioned three-layer brush 120 is
The boundary surface between the first layer 122 and the third layer 126 and the second layer 1
Since the boundary surface between the second layer 126 and the third layer 126 is not parallel, there is a problem that it cannot be manufactured by the manufacturing method disclosed in the above-mentioned JP-A-2-86083.

Therefore, an object of the present invention is that a post-processing such as cutting is not necessary, the conventional process is not largely changed, the waste of the material is eliminated, and the inexpensive brush can be manufactured. A brush manufacturing apparatus and a manufacturing method are provided.

[0016]

In order to solve the above-mentioned problems, a manufacturing apparatus for a multilayer brush according to the present invention has a plurality of punches for pressing raw material powder and a molding space, and together with the plurality of punches. A molding die that constitutes a molding die, and one or a plurality of raw material powder partition plates that are provided so as to be inclined with respect to one surface of the molding space when the raw material powder is charged and that are extracted when the raw material powder is pressed by the punch. And a feeder for sequentially charging two or more kinds of raw material powder into each space partitioned by the raw material powder partition plate, and filling the two or more kinds of raw material powder in the molding space partitioned by the partition plate. It is characterized in that a multi-layer brush is molded by pressing after that.

Further, the method for producing a multilayer brush of the present invention is
In a method for manufacturing a multilayer brush having an inclined interlayer boundary surface, a molding space formed in a molding die is partitioned by one or a plurality of raw material powder partition plates inclined with respect to one surface of the molding space. After that, different raw material powders are put into each space partitioned by the raw material powder partition plate, and the raw material powder partition plate is extracted, and then pressed by the punch or a punch different from the punch, and two or more kinds of the It is characterized in that the raw material powder is pressure-molded and integrated.

[0018]

The multi-layer brush manufacturing apparatus of the present invention has a raw material powder partition plate for partitioning the molding space when introducing two or more types of raw material powder, and is partitioned by the raw material powder partition plate. Two or more kinds of raw material powders can be individually charged and filled in each space. After filling two or more kinds of raw material powder, pull out this raw material powder partition plate,
Then by one of the multiple punches,
By pressing and engaging the stacked raw material powders with each other, a multilayer brush having an inclined layer boundary surface is integrally molded.

According to the manufacturing apparatus and the manufacturing method of the multilayer brush of the present invention, two or more kinds of the raw material powders are put into the molding space having the raw material powder partition plate and filled, and then the laminated raw material powders are obtained. Since it is possible to manufacture a multi-layer brush by pressing with a punch, post processing such as cutting is not required, and it is possible to manufacture an inexpensive multi-layer brush without waste of materials without significantly changing the conventional process. Becomes

[0020]

Embodiments of the present invention will now be described in detail with reference to the drawings.

First Embodiment FIG. 1 is a perspective view showing a partial structure of a manufacturing apparatus of a first embodiment for manufacturing the two-layer brush 100 shown in FIG.

This manufacturing apparatus includes a molding die 10, a horizontal punches 12 and 14, and a lower punch 16 which constitute a compression molding die.
And an upper slide plate 18, a raw material powder partition plate 20 provided in a compression mold for separating and filling two types of raw material powders, and a feeder for feeding two types of raw material powders for brush molding. 30 and 32 are included.

The molding die 10 includes a molding space 40 for pressurizing the raw material powder of the brush, and the molding space 40.
And two raw material powder charging spaces 42 and 44 which are adjacent to the above and which function as a measuring container for the raw material powder while charging two types of raw material powder.

The raw material powder partition plate 20 is for separating and filling the two types of raw material powders when the two types of raw material powders are charged into the molding space 40. It is arranged to be inclined. The inclination direction of the raw material powder partition plate 20 is a direction inclined with respect to each pressing surface of the horizontal punches 12 and 14, and is a direction along one diagonal line of the bottom surface (square shape) of the molding space 40. . More specifically, the inclination angle of the raw material powder partition plate 20 (horizontal punch 1
The angle between the pressing surfaces 2 and 14) is equal to the angle between the interlayer boundary surface and the lower surface of the two-layer brush 100 shown in FIG. 7. The raw material powder partition plate 20 is used only when two types of raw material powders are charged, and is taken out during pressure molding of the brush.

The horizontal punch 12 is arranged so as to be horizontally movable adjacent to one raw material powder charging space 42, and the raw material powder charged in this raw material powder charging space 42 is partitioned by a raw material powder partition plate 20. It is for pushing out in the formed molding space 40 (the horizontal punch 12 side as viewed from the raw material powder partition plate 20 is the molding space 40a) and pressing it in the horizontal direction. Similarly, the horizontal punch 14 is arranged so as to be horizontally movable adjacent to the other raw material powder insertion space 44, and the raw material powder put into the raw material powder insertion space 44 is partitioned by the raw material powder partition plate 20. Formed space 40 (horizontal punch 14 as viewed from raw material powder partition plate 20)
The side is referred to as a molding space 40b) and is pressed horizontally.

Further, the lower punch 16 is arranged below the molding space 40 so as to be movable in the vertical direction, and is designed to be raised when the brush after pressure molding is taken out.
The raw material powder in the molding space 40 can be pressure-molded by the lower punch 16.

One feeder 30 is a two-layer brush 100.
One of the raw material powders is charged into the raw material powder charging space 42, and when the raw material powder is charged, the raw material powder charging space 4
Move to the top of 2. The feeder 30 includes a raw material powder reservoir and a raw material powder discharging device (both not shown) for feeding the raw material powder into the filling space in the feeder 30. This raw material powder discharging device is a mechanism for feeding the raw material powder from the raw material powder reservoir to the filling space by using, for example, compressed air, and further, from the filling space to the raw material powder feeding space 42 through the raw material powder discharging port. It is designed to feed powder.

The other feeder 32 has the same structure as that of the feeder 30, and is for charging the other raw material powder of the two-layer brush into the raw material powder feeding space 44, and at the time of feeding the raw material powder. It moves to the upper part of the charging space 44.

The upper slide plate 18 is a molding space 4
0 is for sealing with the horizontal punches 12 and 14 and the lower punch 16, and can be moved to the upper part of the molding space 40 during pressure molding of the brush.

The upper slide plate 18 is provided integrally with the above-mentioned feeders 30 and 32.

FIG. 2 shows that when two types of raw material powders are filled in the molding spaces 40a, 40b partitioned by the raw material powder partition plate 20, the raw material powders filled in the molding spaces 40a, 40b are It is a figure which shows the structure for preventing it from overflowing.

In FIG. 1A, there is a case where a lid 22 which is integrated with the raw material powder partition plate 20 and which is integrated with the raw material powder partition plate 20 and covers the upper surface of the molding space 40 is provided. It is shown. Material powder partition plate 2 during pressure molding of brush
When removing 0, the raw material powder partition plate 20 is removed together with the lid 22.

The upper slide plate 10 is shown in FIG.
A partition plate through hole 24 is provided in a part of the
The case where the raw material powder partition plate 20 is inserted through 4 is shown.

3 and 4 are explanatory views of the manufacturing process in this embodiment, and show in detail each process of molding the two-layer brush 100. 3A1 and 3B1 and FIGS. 4C1 and 4D1 are plan views of the manufacturing apparatus of FIG. 1 seen from above in each step. 3 (a2), (b2) and FIGS. 4 (c2), (d2) are vertical sectional views of the manufacturing apparatus shown in FIG. 1 in each step. Corresponding.

Hereinafter, the two-layer brush 100 (having the structure shown in FIG. 7 and using the manufacturing apparatus of this embodiment described above, the first layer 102 having a low resistance portion on the upstream side in the rotor rotation direction) is used.
In which the second layer 104 composed of the high resistance portion is provided on the downstream side) will be described with reference to FIGS. 3 and 4. In the manufacturing apparatus described below, the lid 22 shown in FIG. 2A is integrally provided on the upper part of the raw material powder partition plate 20. First layer 10
Reference numeral 2 is a low resistance portion formed so that the commutator contact surface is gradually narrowed from the upstream side to the downstream side in the rotor rotation direction. The second layer 104 is a high resistance part formed so that the commutator contact surface gradually widens from the upstream side to the downstream side in the rotor rotation direction. 8A shows the assembled state of the two-layer brush shown in FIG. 7. Step 1: First, two kinds of raw material powders are charged into the raw material powder charging spaces 42, 44. When charging the raw material powder,
The lower punch 16 is raised to a position where the upper surface thereof coincides with the upper surface of the molding space 40, and the side surfaces of the lower punch 16 and the pressing surfaces of the horizontal punches 12 and 14 form the raw powder feeding spaces 42 and 44. Has been formed. Further, a raw material powder partition plate 20 inclined in a predetermined direction is arranged on the upper surface of the lower punch 16 with its lower end in contact.

In this state, the upper slide plate 1
8 and the feeders 30 and 32 having an integrated structure are moved until their raw material powder discharge ports are aligned with the upper surfaces of the raw material powder feeding spaces 42 and 44, and 2 are fed from the feeders 30 and 32 to the raw material powder feeding spaces 42 and 44, respectively. Raw material powders of different types are charged (see FIGS. 3A1 and 3A2).

Each of the raw material powder charging spaces 42 and 44 has a predetermined capacity, and each of the charging spaces 4 is
By charging two kinds of raw material powders so that 2,44 are filled with the respective raw material powders, the measuring operation of the raw material powders is also performed. Further, by vibrating the feeders 30 and 32, the raw material powder can be charged more smoothly.

Step 2: Next, 2 for the molding space 40
Filling of raw material powder of various types. By lowering the lower punch 16 while keeping the contact state with the raw material powder partition plate 20, and moving the horizontal punches 12 and 14 to the respective raw material powder charging spaces 42 and 44, the molding spaces 40a and 40b are formed. Two kinds of raw material powders are filled in each (see FIGS. 3 (b1) and 3 (b2)). Horizontal punch 12,
Finally, 14 moves until it almost coincides with the side surfaces of the molding spaces 40a and 40b, so that each molding space 4 is moved.
The filling of two kinds of raw material powders into 0a and 40b is completed.

At this time, the lead wire 26 serving as the pigtail of the brush is inserted into the raw material powder in the molding space 40a through the through hole of the one horizontal punch 12.

Step 3: Next, the raw material powder partition plate 20 having an integral structure with the lid 22 is removed, and the upper slide plate 18 is moved to the upper portion of the molding space 40 to seal the molding space 40. (Fig. 3 (c1), (c
See 2)). At this time, in the two types of raw material powders in the molding space 40 from which the raw material powder partition plate 20 is extracted, the position where the raw material powder partition plate 20 is located is substantially the position of the interlayer boundary surface.

Step 4: Next, either one of the horizontal punches 12 and 14 is moved in the horizontal direction, or the horizontal punch 1 is moved.
By moving both 2 and 14 in the horizontal direction, the two types of raw material powders in the molding space 40 are pressure-engaged by the horizontal punches 12 and 14. Or horizontal punch 1
With both positions 2 and 14 fixed, the lower punch 16
Alternatively, the lower punch 16 and the upper slide plate 18 may press and engage the two kinds of raw material powders in the molding space 40.

Step 5: Thereafter, the lower punch 16 is further raised to take out the pressure-engaged brush (see FIGS. 3 (d1) and 3 (d2)), and the taken-out brush is fired in a predetermined firing step. By doing so, the two-layer brush 100 is completed.

Incidentally, by devising the cross-sectional shape of the two-layer brush 100, the pressing force can be evenly extended to the brush end portion. If the vertical dimension of the cross section of the two-layer brush 100 is a and the horizontal dimension is b, then a / b <1 or a
By making / b substantially equal to 1 and making the dimension in the pressing direction relatively short, the pressing force can be evenly applied to the brush end portion.

As described above, in this embodiment, the raw material powder partition plate 20 is provided in an inclined manner in the molding space 40, and the molding space 40 is filled with two kinds of raw material powders. After the raw material powder partition plate 20 is pulled out, these two types of raw material powders are pressure-engaged.

Therefore, the two-layer brush 100 can be molded by only one pressing step, and it is not necessary to significantly change the conventional steps. In addition, since the two-layer brush 100 molded in this manner has the inclined boundary surface in the molding process, post-processing such as cutting is unnecessary, and waste of material can be eliminated. Furthermore, since there is no need for post-processing such as cutting and pressure-molding the first layer 102 and the second layer 104 separately, it is possible to manufacture an inexpensive brush with reduced cost.

Second Embodiment FIG. 5 is a perspective view showing a partial structure of a manufacturing apparatus of a second embodiment for manufacturing the two-layer brush 100.

The manufacturing apparatus of this embodiment comprises a molding die 50, horizontal punches 52, 54, an upper punch 56, a lower punch 58, which constitute a compression molding die, and a molding die 2 which is provided in the compression molding die.
A raw material powder partition plate 60 for separating and filling different types of raw material powders, and a partition plate vertical slide device 62 for inserting the raw material powder partition plate 60 at the time of inserting the raw material powder and removing the raw material powder during pressure molding. , And feeders 70 and 72 for feeding two kinds of raw material powders for brush forming.

The molding die 50 has a molding space 80 for pressurizing the raw material powder of the brush, and horizontal punching is performed so that the pressing surfaces are on both sides in the horizontal direction with respect to the molding space 80. 52 and 54 are arranged. In addition, the lower punch 58 is adjusted so that the lower surface of the molding space 80 serves as a pressing surface.
Are arranged.

The raw material powder partition plate 60 is provided to separate and fill the two types of raw material powders when the two types of raw material powders are charged into the molding space 80.
It corresponds to the raw material powder partition plate 20 of the embodiment. However, this raw material powder partition plate 60 has a sufficient length in the vertical direction so that it can be inserted and removed through the groove formed between the feeders 70 and 72, and the vicinity of its upper end is partially bent. There is.

The partition plate vertical slide device 62 is for inserting / removing the raw material powder partition plate 60. The raw material powder partition plate 60 is inserted / removed by sandwiching a partially bent portion near the upper end of the raw material powder partition plate 60. can do.

The feeders 70 and 72 are the two-layer brush 100.
The above two kinds of raw material powders are to be charged into the molding space 80 partitioned by the raw material powder partition plate 60 to be filled, and moved to the upper part of the molding space 80 when the raw material powder is charged. Further, the feeders 70 and 72 are integrally moved and moved simultaneously, and the groove portions for inserting and removing the raw material powder partition plate 60 in the vertical direction are formed between the feeders 70 and 72 as described above.

Next, the steps for manufacturing the two-layer brush 100 using the manufacturing apparatus of this embodiment will be described.

Step 1: First, two kinds of raw material powders are charged and filled in the forming space 80. Specifically, the feeder 7
While moving 0, 72 to the upper part of the molding space 80,
The raw material powder partition plate 60 is lowered from above the feeders 70 and 72 by the partition plate vertical slide device 62.
After that, each of the two types of raw material powders is charged and filled into the molding space 80 partitioned by the raw material powder partition plate 60 from the feeders 70 and 72. At this time, the feeder 7
By vibrating 0, 72, the raw material powder can be charged more smoothly.

Step 2: Next, the partition plate vertical slide device 6
After pulling out the raw material powder partition plate 60 by raising 2, the feeders 70 and 72 are retracted to remove excess raw material powder in the upper part of the molding space 80. Then, the molding space 80 is closed by lowering the upper punch 56 to the upper surface of the molding space 80.

At this time, the lead wire 74 which becomes the pigtail of the brush is inserted into the raw material powder in the molding space 80 through the through hole of the upper punch 56.

Step 3: Next, by moving either one of the horizontal punches 52 and 54 in the horizontal direction, or by moving both the horizontal punches 52 and 54 in the horizontal direction,
The two types of raw material powders in the molding space 80 are pressed and engaged by the horizontal punches 52 and 54. Alternatively, the positions of both the horizontal punches 52 and 54 are fixed, and the upper punch 5
6, either one of the lower punch 58 and the lower punch 58 is moved in the vertical direction, or both of the upper punch 56 and the lower punch 54 are moved in the vertical direction. The raw material powders of various types may be pressure-engaged.

Step 4: After that, by lowering the lower punch 58 while retracting the horizontal punches 52 and 54,
The two-layer brush 100 is completed by taking out the brush that has been pressure-engaged and firing the taken-out brush in a predetermined firing process.

As described above, also in this embodiment, as in the first embodiment, the two-layer brush 100 can be formed by only one pressurizing step, and the conventional steps need not be changed significantly. . Further, since post-processing such as cutting is not necessary, waste of materials can be eliminated, and post-processing such as cutting and the first
Since it is not necessary to separately pressure-mold the layer 102 and the second layer 104, it is possible to manufacture an inexpensive brush with reduced cost.

The present invention is not limited to the above embodiment, and various modifications can be made within the scope of the gist of the present invention.

For example, a protrusion is provided in the vicinity of the lower ends of the raw material powder partition plates 20 and 60, and when the raw material powder partition plates 20 and 60 are extracted, the interlayer boundary surface between the two types of raw material powder is partially removed. By mechanically stirring, the boundary surface between the two kinds of raw material powders becomes a region in which the boundary surfaces are interdigitated with each other. This allows
The effect is that the binding strength of each raw material powder after the pressure engagement is increased, and the original rectifying characteristic of the two-layer brush 100 is slightly smoothed.

FIG. 6 is a diagram showing an example of the case where the above-mentioned protrusion is provided on the raw material powder partition plate. The same figure (a) is the case where a plurality of cylindrical small protrusions are formed, and the same figure (b)
FIG. 3 is a view of the raw material powder partition plate shown in FIG. Similarly, FIG. 7C shows a case where the saw-shaped tip portions are alternately bent backward and oppositely to form protrusions, and FIG. 7D shows the raw material powder partition plate shown in FIG. It is the figure seen from the A direction. By using such a raw material powder partition plate, it is possible to mold the two-layer brush 100 having a partially agitated and disturbed interlayer boundary surface as shown in FIG. It should be noted that FIG. 6 (f) is a view showing a cross section of the two-layer brush when a raw material powder partition plate having no protrusions is used. Since the two-layer brush is not partially stirred, a substantially linear interlayer boundary surface is formed.

In the above-mentioned first and second embodiments, the case of manufacturing the two-layer brush 100 has been described as an example. However, by providing a plurality of raw material powder partition plates 20 and 60, a multi-layer brush having three or more layers is provided. (For example, the three-layer brush 120 of FIG. 10) can also be manufactured. In this case, a raw material powder partition plate having the same inclination angle as that of each of the three or more layer boundary surfaces is prepared, and a feeder for feeding the raw material powder is prepared in each space partitioned by these raw material powder partition plates. do it.

In the above-mentioned first and second embodiments, the case where the raw material powder partition plates 20 and 60 are flat plates has been described, but these partition plates 20 and 60 may be curved surfaces or the like. It may have any shape as required.

Further, when the two kinds of raw material powders filled in the first embodiment are pressed by the horizontal punches 12 and 14, the lower punch 16 is not always necessary, and the molding die 10 is used to simplify the apparatus. Can be achieved. Similarly, when the lower punch 58 presses the two kinds of raw material powders filled in the second embodiment, the horizontal punches 52, 5 are used.
4 is not always necessary and can be replaced with a molding die 50 to simplify the apparatus.

[0065]

As described above, according to the manufacturing apparatus and the manufacturing method of the multilayer brush of the present invention, after the two or more kinds of raw material powders are put into the molding space having the raw material powder partition plate and filled, Since the laminated raw material powder can be pressed with a punch to manufacture a multi-layer brush, post-processing such as cutting is unnecessary, and waste of materials is eliminated without significantly changing the conventional process. It is possible to manufacture an inexpensive multilayer brush.

[Brief description of drawings]

FIG. 1 is a perspective view showing a partial structure of a manufacturing apparatus of a first embodiment for manufacturing a two-layer brush.

FIG. 2 is a diagram showing a structure for preventing raw material powder from overflowing in a molding space.

FIG. 3 is an explanatory diagram of a manufacturing process according to the first embodiment.

FIG. 4 is an explanatory diagram of a manufacturing process in the first embodiment.

FIG. 5 is a perspective view showing a partial structure of a manufacturing apparatus of a second embodiment for manufacturing a two-layer brush.

FIG. 6 is a view showing a structure of a raw material powder partition plate partially provided with protrusions.

FIG. 7 is a diagram showing the structure of a two-layer brush proposed by the applicant.

8 is a diagram showing an assembled state of the two-layer brush shown in FIG.

FIG. 9 is an explanatory diagram for cutting out a two-layer brush having a boundary surface inclined with respect to the upper and lower surfaces from a two-layer brush having a boundary surface parallel to the upper and lower surfaces.

FIG. 10 is a diagram showing the structure of a three-layer brush proposed by the applicant.

[Explanation of symbols]

 10,50 Molding die 12,14,52,54 Horizontal punch 16,58 Lower punch 18 Upper slide plate 20,60 Raw material powder partition plate 30,32,70,72 Feeder 40,80 Molding space 56 Upper punch 62 Partition Plate vertical slide device

Claims (4)

[Claims] 1. A molding die having a plurality of punches for pressing a raw material powder and a molding space, the molding die forming a molding die together with the plurality of punches, and one of the molding spaces when the raw material powder is charged. Two or more kinds of raw material powders are sequentially charged into the space partitioned by the raw material powder partition plate and one or a plurality of raw material powder partition plates that are provided while being inclined with respect to the surface and are pressed out by the punch. A multi-layer brush manufacturing apparatus comprising: a feeder; and a multi-layer brush that is molded by filling the space for molding partitioned by the partition plate with the two or more kinds of raw material powders and then applying pressure. 2. The raw material powder partition plate according to claim 1, wherein a part of the raw material powder partition plate has a plurality of protrusions, and the raw material powder partition plate is filled with the two or more kinds of raw material powders. An apparatus for manufacturing a multi-layer brush, wherein the interface between the two or more raw material powders is partially agitated by pulling out. 3. A method of manufacturing a multilayer brush having an inclined interlayer boundary surface, wherein one or a plurality of raw material powders in which a molding space formed in a molding die is inclined with respect to one surface of the molding space. After partitioning with a partition plate, different raw material powders are put into each space partitioned by the raw material powder partition plate, and after extracting the raw material powder partition plate, the punch or a punch different from the punch is pressed. A method for producing a multi-layer brush, comprising press-molding two or more kinds of the raw material powders to integrate them. 4. The raw material powder partition plate according to claim 3, wherein a part of the partition plate has a plurality of protrusions, and
After filling the molding space with one or more raw material powders, by pulling out the raw material powder partition plate, the boundary surface between the two or more raw material powders is partially agitated. Method.