JP2002086438A - Equipment for supplying raw material to brick molding machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide equipment for supplying raw materials which can supply uniform raw materials (1) and enables molding of bricks of high precision (2) and which can reduce the dust produced at the supply of the raw materials and is easy to maintain (3). SOLUTION: The equipment for supplying the raw materials to a brick molding machine having a plunger (4), a mold holder (6) and a charger table (12) is constituted of a pelletizer which forms pellets out of the raw materials, a weighing machine (8) which weighs the amount of the pellets required for formed pieces per one stroke and a pellet feeder (9) which charges a mold with the pellets being the weighed raw materials. A charging port (9a) of the pellet feeder (9) and a discharging port (9c) thereof are connected by a flexible tube (9b) and the discharging port (9c) can be moved freely in vertical and horizontal directions within prescribed distances.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a brick forming machine having a plunger, a die holder for holding a die for molding a raw material by the plunger, and a charger table provided on the same surface as the die holder. And a device for supplying raw materials to

[0002]

2. Description of the Related Art As is well known, hydraulic presses and friction presses are known as molding machines for molding refractory bricks. Whichever press is used, the kneaded clay, that is, the compounding raw material must be charged into the mold in a predetermined amount, and at that time, a method called a weighing method is known in a method for determining the predetermined amount. .

An example thereof is shown in FIG. 4. In the figure, a hydraulic press generally indicated by reference numeral A is provided with a hydraulic plunger 4 which moves up and down in an upper frame Fu, and reciprocates on a table 12 in the direction of arrow X. The mixing raw material M in the mold 5 supported by the movable mold holder 6 is pressed. In the figure, Fd is a lower frame. The mold 5 reciprocates between a molding position immediately below the plunger 4 (left side in the drawing) and a material supply position (right side in the drawing).

[0004] The compounded raw material M stored in the hopper 36 at the raw material supply position is introduced into the weighing machine 8 via the conveyor 37, where the weighed material is weighed and a predetermined amount is opened by opening the gate 39 of the hopper 38. It is to be put into the mold 5.

In the weighing method, the raw material can be accurately measured, and the thickness of the compact, that is, the brick, in each cycle can be made substantially uniform. However, in the press described above, since the raw material is dropped many times during the supply of the raw material, separation occurs due to a difference in particle size, so-called segregation, and uniformity is lost unless the raw material in the mold is stirred. . Therefore, in the case of a relatively large brick, for example, a length of 700 mm or more, a stirring operation is always required.

[0006] In addition, since the supply device has a part with a head drop when conveying the raw material, dust is generated at the time of operation, which causes environmental problems. Further, in a portion exposed to the air in which the raw material, that is, the clay, is spilled, when the binder is dried or stuck to a transport device, and the type of the raw material is changed, it takes time to clean. In addition, the cycle time for moving the mold is long, and the productivity is poor.

On the other hand, the capacitive type is shown in FIGS. FIG. 5 shows a so-called mold floating type, in which the mold holder 6 can move up and down in the direction of the arrow Y, and a charger 19 which reciprocates on a table 12 provided integrally with the mold 5 by a cylinder C is provided. The raw material M from the hopper 36 is supplied to the charger 19 via the conveyor 37, and the charger 19 slides on the die 6 by the operation of the cylinder C, so that the raw material M is charged into the die.

In the example shown in FIG. 6, the mold holder 6 is fixed, and the lower plunger 1a moves up and down in the lower frame Fd.
And the upper plunger 4 to press-mold the raw material M. This example cannot be applied to a friction press. Also in this example, the point that the raw material M is supplied to the mold holder 6 by the charger 19 that moves on the table 12 by the cylinder C is similar to the example of FIG.

In this manner, in the case shown in FIG. 4, it is possible to perform an overlapping operation in which the respective steps are simultaneously performed, and in such a positive displacement type, it is possible to reduce the head when the raw material is moved. The input mass tends to vary depending on the state.

[0010]

2. Description of the Related Art It is known that when powder is supplied, a phenomenon called segregation in which coarse particles and fine particles are separated occurs. This problem is caused, for example, by using a rotary stirrer with a charger 19. To a considerable extent.

However, since there is a dropping point at the time of supply of the powdery raw material, when the raw material F is supplied to the hopper H as shown in FIG. 6, for example, as shown in FIG. It falls first, producing a so-called rat hole R, which results in non-uniformity.

That is, even if the raw material is kneaded with a mixer before being charged into the hopper, a continuous and uniform compounded raw material is not always charged depending on the composition of the particle size of the raw material. The binder amount and the like change. Therefore, conventionally, the bulk density has been measured in a hopper, and the variation has been prevented by using a sensor of the binder content degree.

However, even in such a case, there is no effect when there is a variation depending on the position in the hopper.

In addition, since the raw material is powder, when the raw material moves between processes, dust is scattered in the air, which raises a problem that the cost for maintenance of the apparatus and environmental conservation increases. Had occurred.

[0015]

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a raw material supply apparatus capable of supplying a uniform raw material without causing segregation when supplying the raw material. Another object of the present invention is to provide a raw material supply apparatus which can suppress dust generated at the time of raw material supply and which can be managed by numerical values by measuring the supply amount and which is easy to maintain. Still another object of the present invention is to provide a raw material supply device capable of forming bricks with high precision.

[0016]

According to the present invention, there is provided a plunger, a mold holder for holding a mold for molding a raw material by the plunger, and a mold holder for supplying the raw material to the mold. In a raw material supply apparatus for a brick forming machine having a charger table provided on a surface, a pelletizer for forming pellets from raw materials, and measuring an amount of pellets required for a molded product per stroke by supplying the pellets from the pelletizer. Weighing machine, and a pellet feeder for feeding the weighed raw material pellets to a mold, wherein the pellet feeder is connected between a charging port and a discharging port by a flexible tube, and a discharging port is fixed. It can freely move up and down and horizontally within the distance.

A motor-driven screw feeder is inserted in the flexible tube of the pellet feeder, and the pellets in the flexible tube are smoothly and quickly charged into the mold by the rotation of the screw feeder.

It is preferable to interpose a hopper equipped with a motor driven screw feeder or a motor driven belt conveyor between the above-mentioned pelletizer and the weighing machine.

According to the present invention, there is provided a brick molding machine having a plunger, a mold holder for holding a mold for molding a raw material by the plunger, and a charger table for supplying the raw material to the mold. In the raw material supply device, a pelletizer that forms pellets from raw materials, and a weighing machine that measures the amount of pellets required for a molded product per stroke, in which pellets are supplied from the pelletizer,
It comprises a pellet feeder for feeding the weighed pellets into the charger, and a charger that moves on a charger table by a cylinder drive to feed the pellets fed from the pellet feeder into a mold.

A hopper equipped with a motor-driven screw feeder or a motor-driven belt conveyor is preferably interposed between the pelletizer and the weighing machine.

As the pelletizer, for example, the one described in Japanese Patent Application No. 2000-113680 filed by the present applicant can be used.

[0022]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS.

FIG. 1 shows a case in which the present invention is applied to a mold floating type hydraulic press. The raw material used in the present invention is preliminarily formed by a preforming machine, not shown, that is, a pelletizer, for example, having a diameter of 5 to 20 mm and a thickness of 10 to 30 m.
It is formed into particles of about m, that is, pellets. Although the shape of the particles is arbitrary, a cylindrical shape is usually used for ease of manufacture. This pellet is 100-300kg
/ Cm ² , so that there is no deformation of the shape during the transportation of the pellet and no dust is generated.

In the example shown, this pelletizer is not shown separately. A binder or water is added to the compounded raw materials by a mixer installed in a pelletizer, mixed uniformly in advance to a predetermined specific weight and a predetermined particle size distribution, and pressed to form a spherical molded product or a pellet that is a cylindrical molded product. Anything should do. Therefore, press pelletizer type,
Any type such as an auger type and a die hole rotary table type can be implemented.

The hopper 36 has an inlet 36a for pellets,
A feeder 36c driven by a motor to discharge the pellets to the weighing machine 8; It should be noted that a motor driven belt conveyor can be used instead of the feeder 36c.

The weighing machine 8 includes a weighing container 8a into which the pellets P are charged from the hopper 36, a measuring unit 8b for measuring the charged pellets, and a bottom automatically set when a predetermined amount of the pellets is charged into the weighing container 8a. The container bottom 8c is opened and closed automatically. Further, by providing a plurality of weighing machines, it is possible to simultaneously mold a large number of weighing machines.

The pellet feeder 9 connects the charging port 9a for charging the pellets, the discharging port 9c for discharging and charging the pellets to the mold holder 6, the charging port 9a and the discharging port 9c, and temporarily transfers the pellets. And a flexible tube 9b whose height and horizontal distance can be freely changed within a certain range. The discharge port 9c is located on the upper edge of the mold holder 6 or on the same plane as when the pellets are not charged into the mold 5, and when the pellets are charged into the mold 5, the center of the mold 5 is moved by the cylinder C. It is configured to be pushed out. The configuration of the main body of the brick forming machine shown in FIG. 1 is the same as that of the floating mold type hydraulic press of the prior art, and the description is omitted.

FIG. 2 shows an apparatus for supplying a raw material to a brick forming machine according to a second embodiment of the present invention. The only difference between the first embodiment and the pellet feeder 9 is the partial structure and function thereof. Therefore, only differences from the first embodiment will be described. In FIG. 2, a motor M whose axis is directed obliquely downward is provided on the outer periphery of the input port 9a of the pellet feeder 9, and a spiral screw feeder 9d is rotatably connected to the tip of this motor shaft. And is inserted into the flexible tube 9b. The function of the screw feeder 9d is to drop the pellets in the flexible tube 9b smoothly and quickly by rotating a spiral screw.

FIG. 3 shows an apparatus for supplying raw materials to a brick forming machine according to a third embodiment of the present invention. The difference between the first embodiment and the second embodiment is that the mold of the first embodiment and the second embodiment can be moved up and down by a floating cylinder, whereas the mold of the third embodiment is a molding machine. That is, it is fixed to the main body. Correspondingly, the discharge port 9c of the pellet feeder 9 is also of a fixed type, and the pellets P are once introduced into the mold 5 from the discharge port 9c via the charger 19 as in the prior art. Charger 1
The horizontal movement 9 is performed by a cylinder C supported by a charger table 12 fixed to the mold holder 6.

Hereinafter, the operation will be described according to the second embodiment. (In the first embodiment, the screw feeder 9d is eliminated from the second embodiment, and the description is omitted.) The powder raw material and the binder, which are the raw materials, are previously set to a specific weight and a predetermined weight by a pelletizer. It is mixed homogeneously into a particle size distribution and formed into pressed pellets P.

The pellets P after molding are put into a charging step 36a of a hopper 36, and are put into a weighing container 8c of a weighing machine 8 by a screw feeder 36c driven by a motor. When the pellets put into the weighing container 8a reach a predetermined mass, the container bottom 8c is automatically opened and discharged and put into the input port 9a of the pellet feeder 9.

After the entire amount of the pellets has been charged into the charging port 9a of the pellet feeder 9, the discharging port 9c is
The pellets are extruded to the center of the mold 5 and the pellets are quickly and smoothly charged into the mold 5 by rotation of the screw feeder 9 d in the pellet feeder 9.

After the pellets are charged into the mold 5, the discharge port 9c of the pellet feeder 9 is retracted by the cylinder C, and the upper plunger 4 is lowered to add the pellets in the mold 5 to a predetermined thickness. Pressed bricks are formed.

After being formed into a molded product, the plunger 4 is raised to its original position, and the mold holder 6 is lowered by contracting the floating cylinder, and the molded product is pushed upward from the upper edge of the mold 5, By extracting this, all steps of brick forming are completed.

[0035]

The present invention is configured as described above,
The following excellent effects can be obtained. (1) Since the raw material charged into the brick forming machine is a uniform pellet, segregation does not occur at the time of raw material supply. Therefore, only by weighing with a weighing machine, stirring or the like becomes unnecessary, and individual products become homogeneous. (2) The product is stable with no qualitative variation between products. (3) Numerical control is possible by the accurate supply amount of the raw material by the weighing device, and by controlling the brick thickness accurately, true volume control is possible and the molding yield is improved. (4) Since the raw material to be charged into the brick forming machine is not a powder but a granular pellet, the leakage of the raw material between the steps is reduced, and the maintenance of the apparatus is facilitated. (5) Since the raw material input to the brick forming machine is not a powder but a granular pellet, the generation of dust is suppressed, and the working environment is improved. (6) Since the pelletizer is placed separately from the brick forming machine, that is, pellets are produced in another place and segregation does not occur on the way even when the pellets are transferred, there is no problem and the supply of raw materials can be rationalized.

[Brief description of the drawings]

FIG. 1 is an overall configuration diagram of a brick forming machine and a raw material supply device according to a first embodiment of the present invention.

FIG. 2 is an overall configuration diagram of a brick forming machine and a raw material supply device according to a second embodiment of the present invention.

FIG. 3 is an overall configuration diagram of a brick forming machine and a raw material supply device according to a third embodiment of the present invention.

FIG. 4 is an overall configuration diagram of a conventional brick forming machine and a raw material supply device.

FIG. 5 is an overall configuration diagram of another conventional brick forming machine and a raw material supply device.

FIG. 6 is a configuration diagram of another conventional brick forming machine main body.

FIG. 7 is an explanatory view showing a place where powder is put into a hopper.

FIG. 8 is an explanatory diagram when powder is discharged from the hopper of FIG. 7;

[Explanation of symbols]

A: Press machine Fu: Upper frame Fd: Lower frame C: Cylinder 4: Plunger 5: Die 6: Die holder 8: Weighing machine 9.・ Pellet feeder 12 ・ ・ ・ Charger table which doubles as cylinder bracket 36 ・ ・ ・ Hopper

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[Procedure amendment]

[Submission date] September 22, 2000 (2009.2)
2)

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] 0035

[Correction method] Change

[Correction contents]

[0035]

The present invention is configured as described above,
The following excellent effects can be obtained. (1) Since the raw material charged into the brick forming machine is a uniform pellet, segregation does not occur at the time of supplying the raw material. Therefore, only by weighing with a weighing machine, stirring or the like becomes unnecessary, and individual products become homogeneous. (2) The product is stable with no qualitative variation between products. (3) Numerical control is possible by the accurate supply amount of raw materials by the weighing device, and by controlling the thickness of the brick accurately, true specific gravity control is possible, and the molding yield is improved. (4) Since the raw material to be charged into the brick forming machine is not a powder but a granular pellet, the leakage of the raw material between each process is reduced, and the maintenance of the apparatus is facilitated. (5) Since the raw material input to the brick forming machine is not a powder but a granular pellet, generation of dust is suppressed, and a working environment is improved. (6) Since the pelletizer is placed separately from the brick forming machine, that is, pellets are produced in another place and segregation does not occur on the way even when the pellets are transferred, there is no problem and the supply of raw materials can be rationalized.

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 4G054 AA05 AC10 BA02 BA32 BA35 4G055 AA07 AB01 AC03 CA08 CA19 CA24 4G068 AA02 AB22 AC03 AC20 AD01 AD33 AE03 AF21

Claims (3)

[Claims] 1. A plunger, a mold holder for holding a mold for molding a raw material by the plunger, and a charger table provided on the same surface as the mold holder for supplying the raw material to the mold. In a raw material supply device for a brick forming machine, a pelletizer that forms pellets from raw materials, a weighing machine that supplies pellets from the pelletizer and measures the amount of pellets required for a molded product per stroke, and a weighed raw material And a pellet feeder for feeding the pellets into a mold.The pellet feeder is configured such that a flexible tube connects between the input port and the discharge port, and the discharge port is free to move vertically and horizontally within a certain distance. A raw material supply device to a brick forming machine, which can be moved. 2. A plunger and the plunger,
A pelletizer for molding pellets from a raw material in a raw material supply device for a brick forming machine having a die holder for holding a die for molding a raw material and a charger table for supplying the raw material to the die, and the pelletizer thereof. A weighing machine that measures the amount of pellets required for a molded product per stroke when a pellet is supplied, a pellet feeder that feeds the pellets that are the weighed raw materials into a charger, and a pellet that is fed from the pellet feeder. An apparatus for supplying a raw material to a brick forming machine, comprising: a charger that moves on a charger table by driving a cylinder so as to be charged into a mold. 3. A motor-driven screw feeder is inserted into the flexible tube of the pellet feeder, and the pellets in the flexible tube are quickly and smoothly injected into a mold by rotation of the screw feeder. Claim 1
A raw material supply device to the brick forming machine described in the above.