JP2866713B2 - Kneaded clay manufacturing equipment by dry mixing - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to an apparatus for producing clay for ceramics, and more particularly to an apparatus for producing clay by dry-mixing various powders.

(Prior Art) In the case of a ceramic product, for example, a ceramic tile, generally, a raw material clay is dry-press-molded to form a formed body having a predetermined shape, and this is manufactured by drying and firing.

Conventionally, this raw material clay has been manufactured by wet-pulverizing and mixing various raw materials, pigments, and the like, which have been crushed in advance, together with water in a ball mill, and dry-granulating the mixture using a spray dryer.

(Problems to be Solved by the Invention) However, in the case of such a method, since a device such as a ball mill and a spray dryer is large and has a large capacity, it is inevitable to produce a large amount of kneaded material at a time, and therefore, There is a problem that it is difficult to cope with a case where it is necessary to produce various kinds of kneaded clay of different colors little by little.

Further, when the kneaded clay is manufactured in this manner, a large tank for accommodating the kneaded clay is required for each color, and there is a problem that a large space is occupied thereby.

In general, in the case of wet granulation by a ball mill or the like and dry granulation by a spray drier, the obtained kneaded material is obtained by uniformly granulating fine pigment particles and kneaded clay particles constituting a base material. Therefore, the pigment particles are in a state of being dispersed to the inside of each granule, and therefore, when a tile or the like is manufactured using the same, the color of the product is shallow with no change as if painted on one side. There was a problem with color.

(Means for Solving the Problems) The device of the present invention has been devised to solve such problems.

According to the first aspect of the present invention, there is provided a mixer for dry-mixing a plurality of types of powders, a tank for accommodating a reference blended powder in which various raw materials are blended at a predetermined ratio, and a load cell. The reference blended powder supported by the support in the load cell and dropped from the tank was measured by measuring the load applied to the load cell, and was weighed by the weighing conveyor that conveys the weighed amount, and weighed by the weighing conveyor. A certain amount of the reference blended powder, the first transporting and feeding means for transporting and feeding the mixer, and the pigment powder separately prepared from the reference blended powder by an amount corresponding to the measured constant amount. And a second transfer charging means for transferring and charging the mixture into the mixer.

3. The powder according to claim 2, further comprising a second tank containing a powder different from the reference blended powder, and a load cell, the powder being supported by a support in the load cell, and being dropped from the second tank. And a second weighing conveyor for weighing by measuring the load applied to the load cell and conveying the weighed amount.

A third aspect of the present invention is characterized in that the second tank and the second weighing conveyor are for accommodating and weighing any of a plurality of types of pigments when they are used.

(Operation and Effect of the Invention) In the apparatus of the present invention, a reference blended powder in which various raw materials are mixed at a predetermined ratio is stored in a tank,
The reference compound powder is dropped from this tank onto a weighing conveyor. The dropped reference blended powder is weighed by a weighing conveyor, and when the amount reaches a certain amount, the powder is fed into the upper mixer conveyed by the first conveying / inputting means including the weighing conveyor.

The measurement of the reference blended powder by the weighing conveyor can be performed by equipping the weighing conveyor with a load cell, supporting the weighing conveyor with a support in the load cell, and measuring the load applied to the load cell.

On the other hand, a certain amount of pigment powder separately prepared is conveyed to the above mixer by the second conveying and inputting means and charged therein, and the reference prepared powder and the pigment powder are dry-mixed inside the mixer. Thus, the final clay for ceramics is formed.

Incidentally, the second transport charging means may be used for part or all of the first transport charging.

As described above, the apparatus of the present invention manufactures a reference compound powder in advance, stores it in a tank, cuts out a predetermined amount from the tank, adds pigment powder thereto, and mixes it with a dry mixer. To produce kneaded clay.

According to the apparatus of the present invention, it is possible to easily obtain clay of various colors simply by adding and mixing various pigment powders to the reference blended powder. It can be easily handled.

Further, in the apparatus of the present invention, at least one tank for accommodating the reference blended powder may be used as the large-capacity tank, and a large number of tanks are not required for accommodating the clay for each color as in the related art. . Therefore, the space occupied by the tank is reduced, and the narrow space can be effectively used.

The apparatus of the present invention dry-mixes the reference blended powder and the pigment powder. Therefore, by appropriately selecting a mixer, a powder having a form in which the granulated material surface of the base constituent particles is coated with the pigment particles is used. You can get the soil. And, for example, when a tile is press-formed using such kneaded clay, the inner color appears on the surface when the granulated body is crushed at the time of pressing, so that a tile having a deep and soft surface color is used. Obtainable.

In the apparatus of the present invention, the reference blended powder stored in the tank is automatically weighed by the weighing conveyor, and then is automatically carried into the mixer by the first carrying / charging means.
Thus, the weighing conveyor has a load cell, is supported by a support in the load cell, weighs the reference compound powder input from the tank by measuring the load applied to the load cell, and conveys the weighed amount. Have been.

Therefore, it is possible to simultaneously measure the reference blended powder while cutting it out by the measuring conveyor, and it is possible to automatically and continuously manufacture the clay.

In the present invention, a second tank containing a powder different from the reference blended powder, and a second weighing conveyor for weighing the powder dropped from the second tank are provided, and a comparison is made in the second tank. The pigment powder used in a very large amount can be stored and measured by the second metering conveyor (claim 2).

In this way, the simultaneous weighing of the reference prepared powder and the simultaneous weighing and the weighing and the simultaneous weighing of the pigment powder used in a relatively large amount can be carried out into the mixer. Therefore, when using two or more kinds of pigments,
The clay of a desired color can be obtained simply by separately adding only another kind of pigment used in a very small amount, which is convenient. Also, for pigments to be added only in a very small amount, they are weighed in advance and packed in the upper bag, and when necessary, the bag is broken and the entire contents are thrown in. It is convenient.

(Example) Next, an example in which the present invention is applied to a ceramic tile kneaded material manufacturing apparatus will be described in detail with reference to the drawings.

1 to 4, reference numeral 10 denotes a frame on which a plurality (here, nine) of storage tanks are supported. 6 out of 9 storage tanks
This is a storage tank 14 for the reference compound powder, and the remaining 3
These are a storage tank 16 for black pigment, a storage tank 18 for white pigment, and a storage tank 20 for feldspar. Among these tanks, the storage tanks 16 and 18 for black and white pigments are set to have half the width of the other storage tanks, and in this example, these nine tanks are arranged in a rectangular space. Arranged in columns.

The reference blended powder stored in the storage tank 14 is prepared by mixing various raw materials such as feldspar and clay at a predetermined ratio and granulating the raw material in advance to a predetermined particle size. The first to sixth belt conveyors 21, 22, 24, 26, 28, 30 are used and stored.

That is, the reference blended powder that has been blended and granulated in advance outside the apparatus is first mounted on the first belt conveyor 21 at a height near the floor. The first belt conveyor 21 is provided in an inclined state, and its starting end portion is accommodated in a recess 32 formed on the floor surface. A shooter 34 having the same opening height as the floor surface is provided above the start end side portion of the first belt conveyor 21, and the reference blended powder is mounted on the first belt conveyor 21 through the shooter 34.

The reference blended powder mounted on the first belt conveyor 21 through the shooter 34 is conveyed obliquely upward by the first belt conveyor 21 and, from the end thereof, a second horizontally disposed at an intermediate height position of the frame 10. It is transferred to the belt conveyor 22. Then, the reference blended powder transferred to the second belt conveyor 22 is transported by the conveyor 22 in the horizontal direction for a predetermined distance, and transferred to the third belt conveyor 24.

The third belt conveyor 24 is provided obliquely in the same manner as the first belt conveyor 21. The third belt conveyor 24 conveys the reference blended powder transferred from the second belt conveyor 22 obliquely upward again, and sends the reference blended powder to a fourth belt conveyor 26 horizontally arranged on the frame 10. Transfer.

The fourth belt conveyor 26 is disposed in a direction perpendicular to the arrangement direction of the storage tanks, as is apparent from FIG. On the other hand, below the fourth belt conveyor 26, fifth and sixth belt conveyors 28 and 30 are horizontally disposed so as to extend above the storage tanks in each row. Then, the reference blended powder transferred to the fourth belt conveyor 26 is conveyed by the conveyor 26 in a direction perpendicular to the direction in which the storage tanks are arranged, and by the breakers 36 provided correspondingly to the fifth and fifth conveyors. It is distributed to the sixth belt conveyors 28 and 30 as appropriate. Fifth and sixth belt conveyors 28,3
The reference blended powder distributed to the storage tanks 14 is conveyed by the conveyors 28 and 30 in the arrangement direction of the storage tanks, and is appropriately dropped and thrown into the respective storage tanks 14 by the corresponding breakers 38 so that the respective storage tanks 14 are stored. To be housed.

On the other hand, the black and white pigments stored in the storage tanks 16 and 18 are powdery forms that serve as base pigments when coloring the reference preparation powder, and are selectively and relatively mixed into the reference preparation powder in a relatively large amount. The bucket elevator
Using the storage tanks 40 and 42, the storage tanks 16 and 18 are charged and stored. The feldspar stored in the storage tank 20 is for fake stone spots that illuminate the product surface, and has a larger particle size than the feldspar mixed into the reference blended powder. Entered and housed in 20.

That is, bucket elevators 40, 42, 44 are arranged on the back side of the storage tanks 16, 18, 20 so as to extend from near the floor to above the frame 10 (see FIG. 3). Further, hoppers 46, 48 and a shooter 50 are provided at the lower ends of the bucket elevators 40, 42, 44, respectively. And those hoppers 46,48 and shooter 5
When black pigment, white pigment, and feldspar for pseudo-stone spots are put into 0, they are conveyed to above the frame 10 by the corresponding bucket elevators 40, 42, and 44, respectively, and shooter
The liquid is supplied to the storage tanks 16, 18, and 20 through 52. Reference numeral 54 in FIG. 3 denotes a hoist for transporting feldspar.

As shown in FIG. 2, belt feeders 56 are arranged at the lower end discharge ports of the storage tanks 14 for the reference compound powder and the storage tank 20 for the feldspar. These belt feeders 56 are used to carry out the contents stored in the corresponding storage tanks 14 and 20 by rotating the belt feeders 56, and the ends of the belt feeders 56 in the respective conveying directions are placed on the weighing conveyor 58 as shown in FIG. It has been extended. Then, these belt feeders 56 feed the contents carried out from the corresponding storage tanks 14 and 20, ie, the reference blended powder and the feldspar for fake stone spots, into the weighing conveyor 58 according to the rotating operation thereof.

As shown in detail in FIG. 5, the weighing conveyor 58 has a structure in which a conveyor frame 59 holding a belt conveyor is supported by a support (support) 61 via a load cell 60, The load mounted on the belt conveyor can be measured by the load cell 60.
When the weight of the load of the weighing conveyor 58 reaches a predetermined weight, the belt feeder 56 is stopped and the weighing conveyor 58 is operated, and the load, that is, the reference blended powder and the feldspar for the fake stone spot are removed. As shown in FIG. 3, the sheet is transferred to the seventh belt conveyor 62 from the end in the transport direction.

The seventh belt conveyor 62 conveys the reference blended powder (including feldspar for fake stone spots) transferred from the weighing conveyor 58 in a horizontal direction for a predetermined distance, and transfers the reference blended powder from the end thereof to the eighth belt conveyor. Transfer to 64. The eighth belt conveyor 64 conveys the reference blended powder obliquely upward to a height position substantially equal to the opening height position of the mixer 65 as shown in FIG. 1, as shown in FIG. The reference blended powder is transferred from the end to the ninth belt conveyor 66 as described above. The ninth belt conveyor 66 conveys the reference blended powder transferred from the eighth belt conveyor 64 to its end, and throws the reference blended powder into the mixer supply shooter 68, that is, the mixer 65, from the end.

As shown in FIG. 4, the ninth belt conveyor 66 is disposed at a gentle inclination such that the end side is slightly higher than the start end side. In this example, the weighing conveyor 5 is used.
The eighth, seventh, eighth, and ninth belt conveyors 62, 64, 66, and the like constitute a first transfer / injection unit.

Meanwhile, the storage tanks 16, 1 for the black and white pigments
As shown in FIG. 2, a belt feeder 70 that is longer than the belt feeder 56 is provided at the lower end discharge port 8. The end portions of the belt feeders 70 in the conveying direction are extended above the double hoppers 72 and 74, respectively.
The black and white pigments carried out from 16, 18 are supplied to the hoppers 72, 74, respectively.

As shown in FIG. 1, these hoppers 72 and 74 are integrally provided with small belt feeders 76 at their lower ends, and are supported by a frame (support) 80 via a load cell 78. Thus, the weights of the black and white pigments charged into the respective hoppers 72 and 74 can be measured by the load cell 78, and the measured pigments are fed from the hoppers 72 and 74 to the belt feeder 76. To be carried out. As is apparent from this, in this example, each hopper 72, 74, the corresponding belt feeder 76, and the load cell 78 constitute a second weighing conveyor.

Below the end of each belt feeder 76, a cup conveyor 82 is arranged. This cup conveyor 82
The pigment dropped and stored in the cup 84 from the belt feeder 76 is transferred to the ninth belt conveyor 66, and a lower horizontal portion disposed along the floor surface, and vertically from one end of the lower horizontal portion. It comprises a rising portion and an upper horizontal portion which extends horizontally from the rising portion onto the ninth belt conveyor 66. As is clear from FIGS. 1 and 2, this cup conveyor 82
In the lower horizontal portion, the black or white pigment charged into the cup 84 is transported along the rising portion and the upper horizontal portion onto the ninth belt conveyor 66, where the cup 84 is inverted and the pigment contained therein is removed. Transfer to 9 belt conveyor 66.

The black and white pigments transferred to the belt conveyor 66 in FIG. 9 are supplied from the mixer supply shooter 68 to the mixer 65 in accordance with the rotation operation of the ninth conveyor 66 in the same manner as the above-mentioned reference compound powder.
It is thrown in. In addition, the pigment powder for coloring for coloring the reference blended powder is manually poured into the cup 84 of the cup conveyor 82 in the lower horizontal portion as described later. It is fed into the mixer 65 via the conveyor 66. In the present embodiment, the second conveyor feeding means is constituted by the cup conveyor 82, the ninth belt conveyor 66, and the like.

The mixer 65 into which the base pigment, the coloring pigment, the reference blended powder, and the feldspar for false stone spots are introduced is supported by a support disposed on a frame 86 as shown in FIGS. It is rotatably supported on a wall 88 via a shaft 90. Then, the mixer 65 dry-mixes the input standard blended powder and the like by the rotation around the axis 90 and the material stirring action inside the drum around the axis orthogonal to the axis.

Here, a hopper 92 is provided below the mixer 65, and the granulated material that has been dry-mixed in the mixer 65, that is, the clay for the tile, is dropped and thrown into the hopper 92. . The kneaded material put into the hopper 92 is conveyed to a sub-hopper 96 on the press forming machine side by a discharge conveyor 94 as shown in FIG.

 Next, the operation of the apparatus of this embodiment will be described.

In a state where the reference blended powder, the black pigment, the white pigment, and the feldspar for pseudo-stone spots are stored in the storage tanks 14, 16, 18, and 20, respectively, first, the belt feeder 56 of the storage tank 14 is operated, and the storage tank is operated. The reference compound powder stored in 14 is carried out and mounted on the weighing conveyor 58. When it is confirmed by the load cell 60 of the weighing conveyor 58 that the installed amount has reached the predetermined amount, the belt feeders 56 of the storage tanks 14 are stopped, and the belt conveyor of the weighing conveyor 58 is operated. By the operation of this belt conveyor, the load (standard blended powder) of the weighing conveyor 58 is transferred to the seventh belt conveyor 62, and from the seventh belt conveyor 62 to the mixer 65 via the eighth and ninth belt conveyors 64 and 66. It is conveyed and put into.

When the operation of feeding and feeding the reference blended powder is completed, the belt feeder 56 of the storage tank 20 is operated, and a predetermined amount of feldspar is weighed by the weighing conveyor 58 as in the case of the reference blended powder. . Then, as in the case of the reference compound powder, the feldspars weighed by the weighing conveyor 58 are sequentially passed through the belt conveyors 62, 64 and 66 to the mixer 65.
It is conveyed and put into. After performing the weighing operation of the reference blended powder, the weighing operation of the feldspar is successively performed, and after the completion of both of the weighing operations, the reference blended powder and the feldspar are simultaneously transported and supplied to the mixer 65. You can also.

On the other hand, a black pigment or a white pigment and a pigment for coloring are transported and supplied to the mixer 65 in parallel with or before or after the measurement and transport operations of the reference prepared powder and the feldspar. That is, the belt feeder of the storage tank 16 or 18
One of the base pigments 70 is activated, and the hopper 72 or 74 receives and stores one of the black or white base pigments. When the load cell 78 detects that the weight of the base pigment put into the hoppers 72, 74 has reached the predetermined amount, the operation of the belt feeder 70 is stopped, the belt feeder 76 is operated, and the hoppers 72, 74 are operated. The base pigment therein falls and is stored in the cup 84 of the cup conveyor 82. Around this time, a predetermined amount of coloring pigment is stored in the cup 84 in accordance with the weight of the reference blended powder. It is convenient to pack the coloring pigment in advance by the amount used, and to break the bag when necessary to put the entire contents into the cup 84 when necessary.

When the base pigment and the coloring pigment are accommodated in the cup 84, they are transferred to the ninth belt conveyor 66 according to the operation of the cup conveyor 82, and are moved from the mixer supply shooter 68 to the mixer 65 according to the operation of the ninth belt conveyor 66. It is thrown into.

When the reference blended powder, the feldspar, the black or white base pigment, and the coloring pigment are all put into the mixer 65, the mixer 65 is operated, and the mixing action disperses and mixes them. Thus, a clay for a ceramic tile including feldspar, a base pigment, and a coloring pigment is obtained.

By the way, feldspar and clay are blended and granulated at a ratio of 60:40, and the standard blended powder is stored in the storage tank 14, and 500 kg of the standard blended powder is cut out from the storage tank 14,
65 kg of feldspar for fake stone spots is cut out from storage tank 20, 30 kg of black base pigment or 10 kg of white base pigment is cut out from storage tank 16 or 18, and 2 kg of beige coloring pigment is added to them. Is dry-mixed with a mixer 65, about 600 kg of kneaded clay having a beige surface can be produced.

The kneaded material obtained by the mixing action of the mixer 65 is dropped and stored in a hopper 92, and then is input into a sub-hopper 96 on the press forming machine side by a discharge conveyor 94.
From 96, it is conveyed to a press forming machine and press-formed into a predetermined tile shape. The pressed product is fired to produce a ceramic tile having a color corresponding to the coloring pigment.

As described above, the apparatus according to the present embodiment is configured such that the reference blended powder in which various raw materials are blended and granulated at a predetermined ratio and the feldspar for pseudo-stone spots are stored in the storage tank 1 by the corresponding measuring conveyor 58.
While the required amount is cut out from 4,20, the black or white base pigment used in a relatively large amount is cut out from the storage tanks 16, 18 by the required amount by the second weighing conveyor, and the coloring pigment is added thereto at a predetermined ratio. Put in the mixer 65
The dry mixing is performed to produce a clay body for a ceramic tile having a color corresponding to the coloring pigment. Therefore, tiles having different colors can be easily manufactured only by changing coloring pigments that use only a very small amount, so that it is possible to easily cope with small-lot production of many kinds. Still mixer
The mixing of the raw materials in step 65 is dry mixing, and the kneaded clay can be replaced in a short time.

Further, in the apparatus of this example, since only the storage tank 14 for the reference preparation powder needs to have a large capacity as a whole, the area occupied by the entire storage tank can be relatively small, and effective use of space can be achieved. it can.

Further, the kneaded clay finally obtained by the apparatus of the present example is obtained by coating the surface of the granulated body (reference preparation powder) with the pigment. The color of the substrate inside the granules appears on the surface, and the surface color of the finally obtained ceramic tile becomes a deep, soft surface color.

Although the embodiments of the present invention have been described in detail, the present invention can be configured in other forms.

For example, the tank for containing the reference blended powder can be composed of only one large-capacity tank.
Also, in the previous example, the white and black pigments, which are used in a relatively large amount, are automatically weighed by the weighing conveyor. You may make it add. These white and black pigments can be used as color pigments as they are.

Furthermore, in the previous example, the case where the present invention was applied to a kneaded clay manufacturing device for a ceramic tile was described, but the present invention can be applied to other kneaded clay manufacturing devices, as long as the present invention does not depart from the gist thereof, It is needless to say that the present invention can be implemented in various modified forms based on the knowledge of those skilled in the art.

[Brief description of the drawings]

FIG. 1 is a partially cutaway front view of a kneaded material manufacturing apparatus according to one embodiment of the present invention, FIG. 2 is also a partially cutout plan view, and FIG. FIG. 4 is a partially cutaway right side explanatory view of the same, and FIG. 5 is an enlarged perspective view showing a main part of a measuring conveyor for a reference compound powder of the same apparatus. 14: Storage tank for reference compound powder 16: Storage tank for black pigment 18: Storage tank for white pigment 20: Storage tank for feldspar 56,70,76: Belt feeder 58: Weighing conveyor 60,78: Load cell 61: Post ( 62, 64, 66: Belt conveyor 65: Mixer 68: Mixer feeding shooter 72, 74: Hopper 80: Frame (support) 82: Cup conveyor

Continuation of the front page (58) Field surveyed (Int. Cl. ⁶ , DB name) B28C 1/00-3/00 B28C 9/02

Claims (3)

(57) [Claims] 1. A mixer for dry-mixing a plurality of kinds of powders, a tank for accommodating a reference blended powder in which various raw materials are blended at a predetermined ratio, and a load cell, wherein the load cell includes a support. Supported, weighing the reference compound powder dropped from the tank by measuring the load applied to the load cell,
And a weighing conveyor that conveys a weighed amount, a first conveying / injecting unit that conveys and supplies a fixed amount of the reference blended powder measured by the weighing conveyor to the mixer, and separately from the reference blended powder. A second conveying and feeding means for conveying the prepared pigment powder by an amount corresponding to the measured fixed amount and feeding the pigment powder into the mixer; 2. A second tank containing a powder different from the reference compound powder, and a load cell. The load cell is supported by a support, and the powder dropped from the second tank is discharged from the second tank. The apparatus for producing kneaded clay by dry mixing according to claim (1), further comprising: a second weighing conveyor that measures the load applied to the load cell by measuring the load and conveys the measured amount. 3. The second tank and the second weighing conveyor,
3. A method according to claim 2, wherein when using a plurality of kinds of pigments, any one of them is accommodated and weighed.
A device for producing kneaded clay by dry mixing according to item 1.