JP2000117742A - Molder of molding material - Google Patents

Abstract

PROBLEM TO BE SOLVED: To keep the favorable mixed state of molding material stocks by a method wherein an agitating means for agitating molding materials fed in a vessel and a shifting means for changing the relative position between the agitating means and the vessel are provided. SOLUTION: This molder of molding materials is equipped with a plurality of stock feeding devices 1a-1e, which feed respective metered stocks to a vessel 3 having a vessel opening part 3a, an agitating device 2, which advances through the vessel opening part 3a into the vessel 3 so as to agitate the molding materials fed to the vessel 3, a first conveyor belt 4a, which is a shifting means for changing the relative positions among the stock feeding device 1, the agitating device 2 and the vessel 3, and a second conveyor belt 4b for conveying the stock mixture of the molding materials agitated and mixed together with the agitating device 2 to the following process together with the vessel 3. Just below the agitating device 2, an elevating device 5, in which a vertically shiftable push rod 5a is provided slidably in a cylinder 5b, is provided as a means for freely separating and joining the agitating device 2 and the vessel 3 from and to each other.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a molding material molding apparatus for molding a molding material.

[0002]

2. Description of the Related Art Friction materials (brake pads, brake linings, clutch facings, etc.) used for brakes and clutches are generally formed through the steps shown in FIG.

[0003] In other words, for the friction material, a raw material blending design step for selecting the friction material raw material and setting the blending amount in accordance with the required performance, a measuring step for measuring the raw material according to the blending design, and a measuring step. A mixing step of uniformly stirring and mixing the obtained raw materials, a pre-forming step of pre-forming the obtained raw material mixture in a mold, and transferring the pre-formed product to a die in which a back plate is set, and The molding is performed by a thermoforming step of integrally molding the molded product and the back plate by heating and pressing, a heating step of performing a heat treatment for stabilizing quality, and a subsequent polishing and painting step.

As a raw material of the friction material, a friction modifier such as a metal powder, a binder which is a thermosetting resin such as a phenol resin, a filler such as cashew dust, and a reinforcing fiber such as an aramid fiber are generally used. About 10-20 kinds of friction material
It is composed of different kinds of raw materials. Particle size of these raw materials
Shapes, specific gravities, etc., vary, and it is important to uniformly mix the raw materials of these friction materials having different properties in determining the quality of the friction materials.

[0005] The mixer for mixing the raw materials of the friction material generally has a capacity capable of mixing 100 to 500 liters of the raw materials so as not to lower the productivity. This corresponds to about 100 to 500 pieces of friction material in average size. The raw material mixture is taken out of the mixer, transported to the next step, a preforming step, where it is weighed and then put into a mold.

[0006]

However, a raw material mixture in which a plurality of types of raw materials having different properties are mixed is taken out of the mixer because the individual raw materials forming the raw material mixture have extremely weak adhesion to each other. The raw materials in the mixture are separated or segregated due to the shock at the time, the vibration at the time of being transferred to the preforming process, the cutting at the time of measurement, etc.
The composition of the mixture may differ from the blend design value, and as a result, the quality and properties of the formed friction material may not be constant.

[0007] The present invention has been made in view of the above matters,
It is an object of the present invention to provide a molding material molding apparatus in which a favorable mixing state of molding material raw materials in a mixing step is maintained.

[0008]

According to the present invention, an apparatus for molding a molding material is provided as follows to solve the above-mentioned problems.

That is, a raw material supply means for weighing a plurality of types of molding material raw materials and supplying the weighed raw materials to a container having an opening, and entering the container through the opening of the container, And a moving means for changing a relative position between each of the means and the container.

According to another aspect of the present invention, there is provided a rotary drive unit for generating a rotary motion, a rotary shaft having one end connected to the rotary drive unit for transmitting the rotary motion, and a rotary shaft for transmitting the rotary motion. Provided on the other end side, a rotating blade for stirring the mold material supplied into the container, penetrated by the rotating shaft, located between the rotating blade and the rotation driving unit,
The stirring device has a sealing portion for sealing the container, and is provided so as to be relatively detachable from the container.

It is preferable that the rotation drive unit has an adjusting means for adjusting the rotation. Further, the adjusting means may be configured to be connected to a rotation drive unit by the rotation shaft.

The sealing portion may be provided so as to be slidable with the rotating shaft, or may be fixed between the rotating blade and the rotation driving portion. For example, a structure in which the sealing portion has a seal portion that is slidable in the rotation direction of the rotating shaft and that can be fixed in the axial direction of the rotating shaft, and a structure that is fixed to a rotation driving portion and the like are exemplified.

[0013] The sealing portion may be provided with a contact portion for improving the sealing property of the container at a position in contact with the upper end of the container. The abutting portion may be provided at the upper end of the container, or may be provided at both the closed portion and the upper end of the container.

The means for relatively separating the container and the stirring means may be means for moving the container so as to be separated from the closed portion. For example, the container may be placed on the top. An example of a cylinder device which can be moved up and down so that the container is hermetically sealed by the hermetically sealed portion in this state is exemplified. Also,
In a state where the container is fixed, the stirring means may be moved so as to separate from the container. Alternatively, means for moving the container to separate from each other and means for moving the stirring means to separate from each other may be combined.

[0015] The raw material supply means may be means which can be constituted by existing techniques. The raw material supply means is described in, for example,
As described in JP-A-216153, a raw material delivery section for delivering a predetermined molding material, a measuring section for measuring a predetermined amount of the molding material delivered from the raw material delivery section, and a container for storing the measured molding material. And a cutout section for cutting the inside.

The moving means may be means for moving the container to the working position of each of the means, for example, a conveyor belt on which the container is fixedly mounted, or a moving belt in the XY axis direction with the container fixedly mounted. Examples include a movable table that can be moved, a robot hand that grips a container and moves in a two-dimensional direction, and the like.

The moving means may be a means for moving the raw material supply means and the stirring means in a two-dimensional direction, or a moving means for moving a container and a moving means for moving the raw material supply means and the stirring means. You may combine with a moving means. Note that the moving means may be a moving means that enables a three-dimensional movement including a vertical movement in addition to a two-dimensional movement.

When the container has a capacity suitable for stirring and mixing the raw material for one molding material to be molded,
It is preferable since the shock applied to the raw material mixture can be reduced from the end of mixing to the next step, and the mixed state of the raw material mixture can be maintained. That is, when the raw material corresponding to one piece is supplied to the container when molded as a mold material, and the supplied raw materials are mixed, the obtained raw material mixture does not need to be measured and divided in the next step, so that In addition, the mixing state of the raw material mixture can be maintained without applying a shock or the like accompanying the measurement and division.

As described in the prior art, a plurality of types of raw materials for the molding material are selected from raw materials having properties such as a friction modifier, a binder, a filler, and reinforcing fibers. Examples of the friction modifier include zirconium silicate, aluminum oxide, graphite, mica, molybdenum sulfide, and metal powders such as copper, brass, and iron. Examples of the binder include phenolic resin and the like. Examples of the filler include barium sulfate, calcium carbonate, cashew dust, and rubber dust. Aramid fibers, ceramic fibers, carbon fibers and the like are exemplified as the reinforcing fibers.

The plurality of types of molding materials may be such that the raw materials of the respective molding materials are supplied to the container by separate raw material supply means, or composite particles obtained by converting several raw materials into single particles are used. Several kinds of particles may be formed and supplied to the container by different raw material supply means for each different composite particle. Here, the composite particles, while dry-mixing several kinds of raw materials, add and mix a caking coagulant composed of a water-alcohol mixed solvent to wet the raw material mixture and impart viscosity, and then, It can be formed by granulating the wet raw material mixture into granules.

[0021]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An apparatus for molding a molding material according to an embodiment of the present invention will be described with reference to the drawings.

As shown in FIG. 1, a molding material molding apparatus according to an embodiment of the present invention weighs a plurality of types of molding material raw materials, and weighs each weighed raw material into a container opening 3.
a plurality of raw material supply devices 1a to 1a to supply the container 3 having a
1e, enters the container 3 through the container opening 3a, and
A stirrer 2 that stirs the mold material supplied to the container 1, a first conveyor belt 4a that is a moving unit that changes a relative position between the raw material supply device 1 and the stirrer 2 and the container 3,
A second conveyor belt 4b is provided for conveying the raw material mixture of the mold material stirred and mixed by the stirrer 2 together with the container 3 to the next step. Immediately below the stirrer 2, as a means for separating the stirrer 2 and the container 3, there is provided an elevating device 5 in which a vertically movable push rod 5 a is slidably installed in a cylinder 5 b. ing.

In the raw material supply devices 1a to 1e, a screw-shaped raw material cutting feeder 7 is provided in a hopper 6,
The cut-out raw material has a structure in which a predetermined amount of the raw material is supplied to the container 3 via an automatic weighing scale 8. The feeder driving motor for rotating the feeder feeder 7 in the axial direction is connected to the feeder feeder 7.

The stirrer 2 has a motor 9 as a rotary drive for generating a rotary motion, and a rotary shaft 1 having one end connected to the motor 9 and transmitting the rotary motion via a speed reducer 11.
0a, 10b, a rotating blade 12 provided on the other end side of the rotating shaft 10b, and agitating the mold material supplied to the container 3.
Penetrated by the rotating shaft 10b and fixed to the speed reducer 11,
And a sealing portion 13 for sealing the container 3. Sealing part 1
3, to increase the degree of sealing when the container 3 is sealed,
A contact portion 14 is provided at a position where the sealing portion 13 and the container upper end portion 3b come into contact with each other.

The container 3 has a U-shaped cup shape in cross section. Although the capacity of the container 3 is set according to the size of the product, it is generally 1 to 5 liters, and the amount of the raw material supplied to the container 3 corresponds to one raw material when molded as a molding material. Is a volume suitable for stirring. Container 3
Is fixedly mounted on the first transport belt 4a and transported to the raw material supply position of the raw material supply device 1a.

In the hopper 6 of each of the raw material supply devices 1a to 1e, different types of raw materials for the molding material are contained. The raw material of the molding material stored in the hopper 6 may be a single type of raw material, or may be composite particles in which a plurality of types of molding material raw materials are formed as a single particle.
The raw material in the hopper 6 is cut out from the hopper 6 by rotating the raw material cutout feeder 7. The raw material cutting feeder 7 cuts the raw material of the molding material at a constant speed by appropriately selecting the rotation speed of the feeder driving motor and the pitch of the feeder according to the characteristics of each raw material.

The cut mold material is placed in a container 3
Before being supplied into the container 3, a predetermined amount is measured by the scale 8 for automatic weighing.
Metered to be supplied to The container 3 supplied with the raw material from the raw material supply device 1a is conveyed to the next supply position of the raw material supply device 1b by the first conveying belt 4a. In this way, the containers 3 are successively transported to the raw material supply position of the raw material supply device, and a plurality of types of raw materials are supplied by a predetermined amount.

The container 3 to which all the raw materials have been supplied is conveyed by the first conveying belt 4a to the elevating device 5 installed immediately below the stirring device 2. Here, how the raw material of the molding material in the container 3 is stirred by the stirring device 2 will be described with reference to FIGS.

The container 3 transported by the first transport belt 4a is, as shown in FIG.
Placed on top. The push rod 5a slides upward in the cylinder 5b while the container 3 is placed on the upper part. The three teeth of the container moved upward by the push rod 5a, as shown in FIG. 3, enclose the rotating blades 12 inside, and the upper end portion 3b of the container abuts against and abuts against the abutting portion 14 provided in the sealing portion 13. The container 3 is sealed and integrated with the stirring device 2.

With the container 3 and the stirring device 2 integrated, the stirring of the raw material supplied to the container 3 is started. Since the raw materials supplied to the container 3 have different particle diameters, shapes, specific gravities, and the like, it is necessary to perform appropriate agitation according to the type of the raw materials supplied to the container 3 to uniformly stir the raw materials. When stirring the raw materials, the speed reducer 11 adjusts the stirring speed so that appropriate stirring is performed according to the type of the raw materials supplied to the container 3. Therefore, the raw material supplied to the container 3 is uniformly stirred, and the characteristics of the raw material are not impaired by the stirring. Further, since the container upper end portion 3b and the abutment portion 14 are in close contact with each other, even if, for example, a fibrous raw material having a low specific gravity flies up by stirring, it does not jump out of the container 3 and is supplied to the container 3. The composition of the raw material does not change by stirring.

When the stirring is completed, the push rod 5a descends as shown in FIG. 4, and the stirring device 2 and the container 3 are separated. The container 3 returns to the position before stirring, and is transported by the second transport belt 4b to the next step, the preforming step.

The raw material corresponding to one when molded into a molding material is supplied to the container 3 and the supplied raw material is stirred and mixed, so that it is not necessary to measure and cut out the obtained raw material mixture. There is no opportunity for the raw material mixture to separate or segregate after stirring. Therefore, this molding apparatus can uniformly mix the raw materials of the molding material and send it to the next step while maintaining a uniform mixing state.

[0033]

According to the molding material molding apparatus of the present invention, a raw material corresponding to one molded material is supplied to a container, and the container moves between a raw material supply step and a stirring step. It is free and can be separated from the stirring means in the stirring step, and furthermore, the container is movable from the stirring step to the next step so that the mixing state of the raw material mixture of the molding material in the stirring step is maintained. To send to the next process,
A molding material having no variation in quality and properties can be formed.

[Brief description of the drawings]

FIG. 1 is a schematic view showing an apparatus for molding a molding material according to an embodiment of the present invention.

FIG. 2 is a diagram showing an arrangement of a container and a stirring device before stirring in one embodiment of the present invention.

FIG. 3 is a diagram showing stirring by a stirring device according to an embodiment of the present invention.

FIG. 4 is a diagram showing an arrangement of a container and a stirring device after stirring in one embodiment of the present invention.

FIG. 5 is a view showing a general forming process of a friction material.

[Explanation of symbols]

 1a to 1e: Raw material supply device 2: Stirring device 3: Container 3a: Container opening 3b: Container upper end 4a: First transport belt 4b: Second Conveying belt 5 ・ ・ ・ Elevating device 5a ・ ・ ・ Push rod 5b ・ ・ ・ Cylinder 6 ・ ・ ・ Hopper 7 ・ ・ ・ Feeder for material extraction 8 ・ ・ ・ Automatic weighing scale 9 ・ ・ ・ Motor 10a 10b ··· Rotating shaft 11 ··· Reduction gear 12 ··· Rotating blade 13 ··· Sealed part 14 ··· Butt

Claims (2)

[Claims] 1. A method for measuring a plurality of types of mold material raw materials,
Raw material supply means for supplying each of the measured raw materials to a container having an opening; stirring means for entering the container from the opening of the container and stirring the mold material supplied into the container; And a moving means for changing a relative position between the mold and the container. 2. The rotating device according to claim 1, wherein said stirring means is provided at a second end of said rotary shaft, said rotary drive section having one end connected to said rotary drive section for transmitting rotary motion. A rotor for stirring the mold material supplied into the container,
It has a sealing part that penetrates through the rotating shaft, is located between the rotary blade and the rotation driving part, and seals the container, and is provided so as to be relatively detachable from the container. The molding device for a molding material according to claim 1.