JPH08309753A - Charging device of raw material mixture of friction member - Google Patents

Abstract

PURPOSE: To provide a charging device capable of charging a raw material mixture of a friction member in uniform thickness from a feeder to a scale and a molding die. CONSTITUTION: A determined quantity feeder belt conveyor 3 is preferably used as a feeder which drops a raw material mixture A into a molding die 1. Further, the tip of the conveyor 3 is made similar to the shape of an opening part of a molding die 1. A mechanism for moving the conveyor 3 and the molding die 1 relatively to each other horizontally may be provided. It is more preferable to make the tip of the conveyor similar to the shape of the opening part and at the same time, add a mechanism for horizontally relative movement. If this charging device is used, the self-compression of the raw material mixture due to a localized excess charge is prevented from occurring, and thus a friction member almost free from irregularities in density distribution is manufactured.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for uniformly charging a raw material mixture into a measuring instrument or a molding die during the production of friction materials used for brakes and clutches of vehicles such as automobiles and railways and industrial machines. In particular, the present invention relates to a charging device that exerts a remarkable effect in the manufacture of large-sized disc brake pads and the like.

[0002]

BACKGROUND OF THE INVENTION Friction materials include, due to their use characteristics, a fibrous structural reinforcing material, a binder that solidifies it to maintain its overall shape, and a filler that adjusts friction and wear performance.
As the filler, powders or particles of metal, inorganic substance, organic substance are used. These raw materials are usually mixed and then heat-molded to have a shape suitable for the intended use.

Therefore, it is best for the raw material mixture to have fibers, granules, and powders uniformly mixed with each other, but if there is movement such as movement or dropping, segregation will occur due to the difference in shape or specific gravity. It is easy and very difficult to handle.

Such a raw material mixture for friction materials is handled with great care during the movement and sorting, unlike the operation for general powders, and it has been considered difficult to handle by mechanical operation. It was

However, at present, handling of the friction material raw material mixture is progressing toward mechanization of mechanization of weighing work using an automatic weigher or preforming by pressurization at room temperature, and is gradually shifting to mechanical operation. is there.

[0006] For example, as an alternative to manual weighing of the mixture, a screw type feeding device used in an extruder, a mixture feeding device in which a spiral ribbon is put in a cylinder and is rotated, or an actual flat plate 2 A fixed amount supply device using a belt conveyor disclosed in No. 61816 is adopted, and a weighing machine is combined with these devices to shift from manual weighing to automatic weighing.

Furthermore, an apparatus having a weighing precision that can sufficiently substitute for manual weighing has appeared, such as a structure in which a cutting device is attached to the tip of a weighing machine (Japanese Patent Laid-Open No. 6-191646).

[0008]

However, the problems that occur not only in the raw material mixture of the friction material but also in the granular material are as follows.
When the supplied powder accumulates like a mountain, the granular material directly below the apex that became a mountain due to accumulation is compressed by its own weight,
There is a phenomenon of higher density than other parts. This tendency is large in the friction material raw material mixture including the fiber entanglement, which affects the subsequent density distribution.

This tendency remains even after preforming or heat and pressure molding. This is remarkable especially in the case of a mixture having a large amount of fibers and having a low fluidity.

Therefore, when the raw material mixture is weighed and put into the molding die, it is an effective means to make the density uniform, and it is necessary to pay sufficient attention to the weighing.

When the final product is a small molded product or a block molded product, the width of the mold of the automatic weighing machine is similar to that of the mold, and the thickness of the mold should be substantially uniform even when charged in the center. However, in the case of an arc-shaped, donut-shaped or large-sized molded product, the mixture is concentrated on one point or one line, and it is difficult to make the density uniform.

Friction materials having a large difference in density have unstable friction performance, and deteriorate the performance of brakes and clutches. Therefore,
In particular, in the production of large friction pads, a means for uniformly charging the raw material mixture into a mold having a large charging area is strongly desired.

Therefore, according to the present invention, in order to make the density of the friction material uniform, the raw material mixture for the friction material, which has low fluidity and contains fibers, is uniformly charged into the measuring device or the molding die by machine operation. The challenge is to be able to do so.

[0014]

In order to solve the above problems, the present invention relates to a device for dropping a raw material mixture of a friction material from a tip of a feeder into a weighing machine or a molding die as follows: Add any element of c.

A. The shape of the tip of the feeder is similar to the shape of the opening of the weighing machine or the mold. b. A mechanism is provided for horizontally moving the feeder and the scale or the mold to displace the tip of the feeder on the opening of the scale or the mold. c. It has both the elements a and b.

The feeder used here is preferable because the constant amount supply belt conveyor has a width at the supply front end and the supply amount in the width direction is stable.

In the case of a belt conveyor, the belt is made of a stretchable material, and the turn roll at the tip is made bendable so that the tip has a shape close to the shape of the opening, that is, an arc shape. can do.

Even when a plurality of quantitative supply conveyors are used in combination as a feeder, the tip shape of the feeder is approximated to the peripheral shape of the opening of the weighing machine or the molding die by shifting the tip position and direction of each conveyor. It is possible to

The relative movement of the feeder and the measuring instrument or the molding die in the horizontal direction may be carried out by supporting the measuring instrument or the molding die on an XY table and moving in two horizontal axes. If the shape of the tip of the feeder is approximately the same as the shape of the opening and the shape of the tip of the feeder is similar to that of the opening, the feeder may be moved back and forth. Instead of moving the feeder back and forth,
Of course, the structure may be such that the measuring instrument or the molding die is moved in the depth direction of the opening.

Further, when the frontage dimension of the opening is large and the depth dimension is not so large, a metering device or a molding die is provided by arranging a constant quantity supply conveyor having a supply width substantially equal to the depth dimension on the side of the opening. A structure that moves the container along the arc of the center of the opening in the depth direction, or a structure in which a fixed-quantity supply conveyor whose supply width is narrower than the opening dimension of the opening is placed at the center of the opening in the opening direction and the tip of the conveyor swings left and right Will also be valid.

Further, when the depth of the opening is large, it can be dealt with by relative movement in the front-back direction, but as another method, a flap-shaped shooter having an inclination angle adjusting mechanism is added to the tip of the feeder, It is also possible to distribute the raw material mixture back and forth by changing the inclination angle of the shooter. When this shooter is combined with the feeder that swings left and right as described above, the relative movement mechanism in the front-rear direction becomes unnecessary unless the depth of the opening is too large for the shooter.

Further, when the friction material raw material mixture is in the form of granules, it is preferable to use a vibrating feeder, and a plurality of such vibrating feeders are also used, and a sub vibrating feeder is provided below the tip of the main vibrating feeder. By mounting at a certain angle and vibrating both the main and sub feeders, the degree of uniform thickness of the raw material at the time of charging can be made more accurate.

Further, in this structure, if the sub-feeder is provided with a mechanism for adjusting the crossing angle with the main feeder and the crossing angle with the main feeder can be arbitrarily changed, the raw material can be more accurately and uniformly thickened according to the shape of the friction material. Can be input.

[0024]

The function of the friction material is, as described above,
Since a mixture of raw materials such as fibers, powders, and granules having various shapes and different specific gravities is used, it is necessary to pay sufficient attention to the handling of the mixture. Since the raw material mixture itself has compressibility, it is important to have a uniform thickness when the mold is charged.By this uniform thickness, the friction interface is stabilized without a difference in specific gravity, and even when used in a brake, it is uniform. Therefore, it shows stable friction performance. On the contrary, when the specific gravity varies, the function of each part of the friction surface becomes different, and the friction performance tends to be unstable.

In the charging device of the present invention, the shape of the tip of the feeder is approximated to the shape of the opening of the weighing machine or the molding die, or the tip of the feeder and the opening are relatively moved horizontally to move the charging point. By doing so, the charging to the area to be charged is accurate, and at a specific place that occurs when the feeding point is fixed or the raw material mixture fed to the unnecessary area gathers in one place. It also reduces the excessive input of. Therefore, at the time of weighing before and after the molding process, the raw material mixture can be widely dispersed and uniformly charged into the measuring device or the molding die, and this uniform charging eliminates local self-compression and makes the charging thickness uniform. Can be converted.

As a result, the variation in specific gravity due to the production of the friction material, particularly the friction material used for a large disc brake, is reduced, and the friction performance is stabilized.

The feeder for feeding the raw material mixture can stably cut out the raw material mixture by feeding a small amount even with a cylindrical feeding device, but the constant amount feeding conveyor can perform an average feeding in a short time. Therefore, it is advantageous.

In particular, the disc brake pads are rarely rectangular in shape due to their uses, and most of them are arcuate in shape, and a means capable of supplying them along this shape on average and in a short time is the most effective.

Considering this, as a feeder, a constant quantity feeding conveyor, in particular, a conveyor whose tip shape substantially matches the shape of the opening of a molding die or the like is used, and the feeding point is moved by relatively moving the conveyor and the opening. The device is preferable because it can achieve both mass productivity improvement and averaging of the input amount.

The friction material is generally made of metal fibers, organic fibers made of aromatic polyamide, reinforcing fibers such as inorganic fibers such as glass fibers, ceramic fibers and carbon fibers, and metal powder, inorganic powder and organic powder. There is a powder group such as the above, and granular materials represented by rubber powder, tire powder, cashew dust, and the like, and in simple mixing, when they are vibrated, they are separated and segregated immediately.

In the case of such a mixture which easily separates and segregates,
Although the use of a vibrating feeder is not preferred, the vibrating feeder is effective for a mixture in which a granular material is adhered to a fiber with a viscous liquid to prevent separation and segregation, particularly a granulated mixture. The difference in the density of the granulated product due to the self-compression of the mixture itself as described above does not easily occur, but averaging the mixture and introducing the mixture stabilizes the height of the granulated product in the mold, and heat-molds this. In that case, a density difference is less likely to occur.

A vibrating feeder is preferable for charging the granulated material, and the tip (exit) of the vibrating feeder may be changed according to the shape of the friction material. Among the friction materials, the disk pad, in particular, has a shape in which a part of the arc is cut off because the opponent of the friction is the disk of the disk, and therefore, the tip of the vibrating feeder is also preferably arcuate.

Furthermore, if the sub-feeder is attached to the end of the main feeder, the width of the pad to be manufactured can be dealt with by changing the outlet width of the feeder with the sub-feeder. The one that allows the angle of the sub-feeder to be changed arbitrarily by the cross-angle adjustment mechanism with the main feeder is especially for those where the width of the pad changes within each pad (in many cases in practice). , It is possible to change the feeder outlet width during weighing to match the width of the mold opening (this changes depending on the relative movement of the feeder and the mold), so that a more stable charging can be performed and a charging mixture (granulated material)
It is possible to avoid the spillage of the outside of the mold.

In such a charging device, the effect is more remarkable as the opening of the charging space has a particularly arcuate shape and the ratio of the maximum dimension in the longitudinal direction / the maximum dimension in the short direction is larger. Clearly, it is effective when used for manufacturing a pad having a shape of 2.0 or more.

The relative movement of the feeder and the opening may be performed by the method described with reference to FIGS. 6 and 8, and such an object can achieve the object of the invention.

The average value of the specific gravity of the finished disc brake pad varies depending on the composition of the raw material contained in the raw material mixture and the rate of pores essential to the friction material. preferable. The specific gravity of commonly used friction materials is on average 2.0 to
It is 3.0, and it is desirable that the variation in specific gravity is within ± 10%, preferably within ± 5%.

By using the charging device of the present invention, it is possible to control the variation within this preferable range, as will be understood from the examples described later.

[0038]

2 to 8 show an embodiment of a charging device of the present invention.

FIG. 2 shows a case where one fixed quantity supply belt conveyor 3 having a supply width about the same as the front dimension of the opening of the molding die 1 is used as a feeder. The constant quantity supply conveyor is provided with the raw material mixture A on the conveying surface from a hopper (not shown) or the like.
Is supplied in a predetermined width and thickness, and is sequentially dropped from the tip. For example, those disclosed in Japanese Utility Model Laid-Open No. 2-40732 and Japanese Patent Laid-Open No. 6-191646 can be used. The belt 4 of the conveyor 3 is made of rubber or the like and has elasticity. Further, the turn roll 5 at the tip is divided into a plurality of pieces in the longitudinal direction (the figure is divided into three parts), these are connected by a universal joint 6, and then an angle is formed along the arc-shaped edge of the opening of the mold 1.
Shafts attached to both ends of the roll via universal joints are supported by bearings 7 to maintain the bent state. If a space adjusting mechanism (not shown) is provided between the bearings 7, 7 on both sides of the turn roll 5, the bending angle can be freely set by adjusting the space between the bearings.

The turn roll 5 is covered with a stretchable belt 4 to approximate the shape of the tip of the conveyor 3 to the shape of the arc edge of the opening of the mold 1. A slide table 8 that supports the mold 1 and moves the mold in the longitudinal direction of the conveyor 3 (the depth direction of the mold opening) is also provided. Reference numeral 9 is a drive means of the slide table 8, and an air cylinder is adopted here.

Reference numeral 2 is a hood for collecting the raw material mixture A that has left the charging area and dropping it into the mold 1.
It is removably fitted into the opening of the.

FIG. 3 is a view in which the tip shape of the feeder is approximated to the edge shape of the opening of the die 1 by combining three narrow quantity supply belt conveyors 23, 13, 23 in parallel with each other. The belt conveyors 23 on both sides have a structure in which the turn roll 15 at the tip is tilted in opposite directions in a horizontal plane, and a tension roller (not shown) absorbs a circumferential length difference between both ends of the belt 4 caused thereby. In this case, the belt 4 may have no elasticity.

FIG. 4 is a view in which the tip shape of the feeder is approximated to the shape of the opening of the mold 1 by combining the constant quantity supply belt conveyors 13 _-1 , 13 _-2 , 13 _-3 having different widths in multiple stages. This device, the upper conveyor 13 _-1 maximum width, the middle conveyor 13 _-2 next width, minimum width of the conveyor 13 _-3
Is arranged in the lower stage, and the narrower the width of the conveyor, the more the front end is projected forward. Further, the widthwise centers of the respective conveyors are aligned with each other, and a part of the raw material mixture A dropped from the conveyor 13 _-1 is received by the conveyor 13 _-2 and sent a little forward, and further from the conveyor 13 _-2. A part of the raw material mixture that has fallen is received by the conveyor 13 _-3 , is sent a little further forward, and is put into the mold 1.

As shown in FIG. 5, the tip shape of the feeder can be approximated to the shape of the opening of the mold 1 by a method of arranging a plurality of fixed quantity supply belt conveyors 13 in different directions.

In the above embodiment, if the depth of the opening is large, the conveyor and the die are combined with each other in the direction of the arrow in the drawing, and the introduction points are sequentially shifted to perform the introduction. As a result, it is possible to perform the filling with an average thickness over almost the entire area of the mold 1.

The relative movement may be performed by a method of moving the conveyor by providing a moving mechanism on the conveyor side.

In FIG. 6, a constant quantity supply belt conveyor 13 having a width matching the depth dimension of the mold 1 is arranged on the side of the mold,
The mold 1 is moved in an arc shape along the center line in the depth direction with respect to the conveyer to insert the mold, and the mold 1 can be easily moved using a rotary table or the like.

FIG. 7 shows the constant quantity supply belt conveyor 13
A swinging mechanism (not shown) using a cam or the like swings the mold 1 toward the frontage of the mold 1 for loading. It goes without saying that the same result can be obtained by moving the mold 1 in the same manner as in FIG. 6 instead of swinging the conveyor.

The charging device of FIGS. 6 and 7 is a little disadvantageous in terms of the charging time, but it is sufficient that one conveyor having a narrow width is used, and the equipment cost is low.

By combining the apparatus shown in FIG. 7 with the slide table 8 shown in FIG. 2 and the like, uniform loading can be performed even if the depth of the mold 1 is large.

Further, as shown in FIG. 8, a flap-shaped shooter 10 having a tilt angle adjusting mechanism (not shown) for swinging up and down is provided at the tip of the constant quantity supply conveyor 13, and the tilt angle of this shooter is changed. Even with the configuration, the raw material mixture dropped from the conveyor 13 onto the shooter 10 can be distributed to the front and back (in the depth direction of the opening). If this shooter 10 is added to the apparatus shown in FIG. 7, it is possible to uniformly load a die having a large frontage and a large depth with a single conveyor having a narrow width.

10 and 11 show an embodiment of a charging device using a vibration feeder. In these devices, a granulated raw material mixture (hereinafter referred to as a granulated product) A ′ is put into a mold 1.

The dosing device shown in FIG. 10 is used for manufacturing a disc brake pad having a constant width, and the granulated product A'is used.
Is sent from a fixed quantity supply device (not shown) to the vibrating feeder 31, and is advanced by the vibration of the feeder to fall from the tip outlet having an R shape that matches the arc edge of the die opening and be housed in the die 1. When the mold 1 and the vibrating feeder 31 are charged while being relatively moved in the direction of the arrow by an appropriate driving mechanism, the granules A ′ are charged uniformly in the whole area of the mold 1, and after that, heating is performed. The pad obtained by pressure molding has a small difference in density.

The loading device of FIG. 11 is suitable for manufacturing a disc brake pad whose width gradually increases from the disc inner diameter side to the outer diameter side. The device, its sub-feeder 32 _-1 to front lower portion of the feeder, the mounting 32 _-2 granules A 'sub-feeder 32 _-1 during introduction of 32 _-2 main feeder vibration feeder 31 as the main feeder Alternatively, the pivot point to a member whose relative position with respect to the main feeder is fixed is used as a fulcrum to turn in the opposite direction, and the exit width of the feeder is gradually changed by the relative movement of the feeder and the die. It is almost the same as the mold opening width. Therefore, the granulated product A ′ can be thrown into the mold 1 with almost no spilling to the outside.

It should be noted that the sub-feeder is swung in accordance with a change in the die opening width by providing a swivel mechanism having a drive source. The drive source in this case may of course be a motor or the like, but a drive source that changes the relative displacement between the feeder and the die into a rotary motion by a known motion conversion mechanism (for example, a cam groove and a pin) and transmits it to the sub feeder. When used, a dedicated motor is not required, and the width can be adjusted in synchronization with the relative displacement with a simple mechanism.

The experimental results for confirming the effect of the present invention will be described below.

In the experiment, a disc brake pad for a large truck having the shape shown in FIG. 1 was manufactured by the following procedure, and how much the pad density varied due to the difference of the charging device used when charging the raw material mixture. Examined. 21 of the figure
Is a friction material, and 22 is a back plate.

The raw material mixture used has the composition shown in Table 1.

[0059]

[Table 1]

This raw material mixture was charged into a hopper having comb blades, fed from the hopper to a conveyor with a constant thickness and a constant width, and charged into the mold from the tip of the conveyor.

The brake pad to be manufactured has an arc shape with a length (frontage dimension) of 300 mm, an outer diameter of 396 mm, an inner diameter of 246 mm, and a friction material width of 75 mm. FIG. 9 shows the opening shape of the mold into which the friction material is put. L in the figure is the length,
W represents the width. The size of this opening, that is, the maximum dimension in the longitudinal direction of the friction material / the maximum dimension in the short direction is 300/75 =
It is 4.0.

Example 1 The raw material mixture was charged into the mold having the opening shown in FIG. 9 using the multi-stage quantitative feed belt conveyor shown in FIG.

The conveyor has a supply width L ₁ of 13 _{-1 in} the upper stage of 3
300 mm, the feed width L ₂ of the middle 13 _-2 160 mm, and 80mm feed width L ₃ of the lower 13 _-3, the combined center of three parties the middle of the conveyor 13 _-2 to the tip of the 13 _-1 30
The lower conveyor 13 _-3 was projected 12 mm forward from the tip of 13 _-2 . Further, the hood 2 having an inclination angle of 45 ° and a height of 50 mm was placed on the mold to prevent the raw material mixture from escaping out of the mold.

Then, the raw material mixture was charged at 1/3 of the predetermined amount at a position where the upper conveyor 13 _-1 was on the inner circumference of the mold, and then each conveyor was moved forward by 27 mm for the second time.
/ 3 is thrown in and the remaining 1 at the position advanced 27 mm.
/ 3 was thrown in. The raw material mixture that has dropped to the charging area outside the opening edge is collected by the hood and flows to the nearby charging shortage area.

Thereafter, the mold with the hood 2 removed was placed at 170 ° C.
The heated pressing mold was set to, and molding was carried out for 20 minutes at a surface pressure of 250 kg / cm ² using a pressure molding machine having a heating plate kept at 170 ° C.

The friction material obtained in this manner was cut into a longitudinal center portion and an end portion having a width of 20 mm, and further, each cut material was cut to have an outer peripheral side of 20 mm, an inner peripheral side of 20 mm and a central portion of 20 mm. When 6 samples were taken and the specific gravity was measured by water replacement, all samples were within 6 points average ± 0.04.

-Comparative Example 1- The raw material mixture used in Example 1 was weighed using only the conveyor having a supply width of 300 mm among the conveyors used in Example 1. Here too, Example 1 was used to prevent the raw material mixture from escaping.
The hood used in 1. was used.

After the raw material mixture in the mold after the measurement was heated and pressed under the same conditions as in Example 1, 6 points at the same position of the friction material were sampled and the specific gravity was measured. As a result, there was a large variation in the specific gravity. The average of 6 points was ± 0.12.

-Example 2-The conveyor was fixed in the same manner as in Example 1, and the molds were shifted three times in total in the direction of the conveyor, and the results were the same as in Example 1 in this case as well. It was

Example 3 The multi-stage conveyor of Example 1 was fixed, an inclined shooter as shown in FIG. 8 was attached to the tip of the conveyor, and the shooter was swung back and forth to weigh. As a result, there were 6 variations in specific gravity. The average was within ± 0.05.

Example 4-A fixed amount feeding belt conveyor having a feeding width of 75 mm is arranged on the side of a mold (same as in Example 1) 1 as shown in FIG. Was charged into the mold until a predetermined measured value was reached. The conveyor was fixed, and the molds were sequentially shifted so as to draw an arc. The moving speed of the mold and the feeding speed from the conveyer were adjusted so that the measurement was completed during one reciprocation, and then charging was performed, and thereafter, molding was performed in the same manner as in Example 1 and a sample at the same position was sampled. When the specific gravity was examined for this, the average of the three points at the end was 0.01 larger than the average of the three points at the center, and the variation in the average of the six points was within ± 0.03.

Example 5-Using the charging device shown in FIG. 2, the raw material mixtures shown in Table 1 were charged and weighed. The mold is the same as that described above, and the hood is placed in the opening. Quantitative supply belt conveyor 3
Is obtained by dividing a turn roll having a length of 30 cm into three parts, connecting them with a universal joint 6, making an angle close to the arc of the opening of the mold, and applying a stretchable belt. As a result of measuring the specific gravity at the same 6 points of the friction material after molding by fixing the conveyor 3 and inserting the mold 1 in the longitudinal direction of the conveyor to measure, the average of 6 points is ± 0.05.
Met.

[0073]

As described above, by using the charging device of the present invention, the raw material mixture can be widely dispersed in the charging region and charged to an average thickness, which is a problem in mechanical charging work. Further, it becomes possible to stabilize the friction performance by reducing the variation in the density distribution of the friction material.

[Brief description of drawings]

FIG. 1 is a perspective view showing an example of a disc brake pad for a large truck.

FIG. 2A is a perspective view of a tip portion showing an embodiment of a charging device of the present invention. FIG. 2B is a plan view of the tip portion of the same device.

FIG. 3 is a perspective view of a tip portion of another embodiment.

FIG. 4A is a perspective view of a tip end portion of another embodiment. FIG. 4B is a side view sectional view of the same device.

FIG. 5 is a perspective view of a tip end portion according to still another embodiment.

FIG. 6 is a perspective view of a tip portion of another embodiment.

FIG. 7 is a perspective view of a tip portion of another embodiment.

FIG. 8 is a perspective view showing an example of a state of insertion into a mold.

FIG. 9 is an explanatory diagram of a charging example by the device of FIG.

FIG. 10 is a perspective view of a tip portion of an embodiment using a vibrating feeder.

FIG. 11 is a perspective view of a tip portion of an embodiment that also uses a vibration feeder.

[Explanation of symbols]

1 mold 2 Food 3,13,23 dispensing belt conveyor 4 belt 5,15-turn roll 6 universal joint 7 bearing 8 slide table 9 table drive means 10 chute 21 friction material 22 backing plate 31 vibrating feeder 32 _-1, 32 _{- 2} Sub-feeder A Raw material mixture A'Granulated product (granulated raw material mixture)

Claims (10)

[Claims] 1. A charging device for dropping a raw material mixture of a friction material from a tip of a feeder into a measuring device or a molding die, wherein any one of the following elements a, b and c is added. Feeder for raw material mixture. a. The shape of the tip of the feeder is similar to the shape of the opening of the weighing machine or the mold. b. A mechanism is provided for horizontally moving the feeder and the scale or the mold to displace the tip of the feeder on the opening of the scale or the mold. c. It has both the elements a and b. 2. The charging device for the friction material mixture as claimed in claim 1, wherein the feeder is a constant quantity supply conveyor. 3. The feeder is a constant quantity supply belt conveyor, the belt of the conveyor is made of a stretchable cloth, and further, a bendable belt turn roll and a bending state holding mechanism for the roll are provided at the conveyor tip end. 2. The feeding device for the friction material mixture as claimed in claim 1, wherein the shape of the tip of the feeder is approximated to the shape of the opening. 4. The feeder according to claim 1, wherein the feeder comprises a plurality of constant quantity supply conveyors, and the positions or directions of the tips of the plurality of conveyors are shifted so that the shape of the tip of the feeder approximates the shape of the opening. Feeding device for friction material mixture. 5. The feeder is a constant quantity supply conveyor, and includes a mechanism for relatively moving the conveyor and a weighing machine or a molding die in the depth direction of the opening.
The charging device for the friction material mixture as described in 2, 3 or 4. 6. The constant quantity supply conveyor in which the feeder has a supply width narrower than the opening size of the opening, and includes a mechanism for swinging the conveyor to the left and right. 5. The charging device for the friction material mixture as described in 5. 7. The flap-shaped shooter for sorting the raw material mixture dropped from the feeder back and forth by changing the tilt angle by a tilt angle adjusting mechanism at the tip portion of the feeder. Feeding device for the friction material mixture. 8. The charging device for the friction material mixture as claimed in claim 1, wherein the feeder is a vibrating feeder. 9. The feeder comprises a plurality of vibrating feeders, and the plurality of vibrating feeders include a sub-feeder that vibrates with the vibration of the main feeder at a part of the tip of the main feeder from below at a certain crossing angle. The friction material raw material mixture charging device according to claim 1, which has a stacked structure. 10. The charging device for the friction material mixture as claimed in claim 9, further comprising a mechanism for adjusting an intersection angle of the sub feeder with respect to the main feeder.