JPS6237104A - Molding equipment for removed earth for refractory - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a molding device for refractory clay that compresses and molds refractory clay into a predetermined shape.

[Prior Art] This type of molding apparatus has conventionally generally had the following configuration. That is, the lower mold is provided within the mold so that it can move up and down, and the upper mold is provided so that it can enter the mold from above. In order to supply clay into the formwork, a clay supply device has a clay storage section consisting of a plurality of small chambers that are open at the top and bottom.
It is provided movably between a standby position and an advanced position located on the formwork. A hopper that stores a large amount of clay is provided, and when the clay supply device returns to the standby position, clay flows from the hopper into the clay storage section. When the clay is advanced onto the lowered formwork, the clay in the clay storage section is supplied into the formwork. The clay supplied into the mold is compressed between the lower mold and the upper mold and formed into a predetermined shape, and the lower mold is raised to take out the molded body.
Thereafter, the supply of clay, compression molding, and removal of the molded body are sequentially repeated to continuously produce the molded body.

[Problems to be Solved by the Invention] By the way, since the clay flowing from the hopper into the clay storage section of the clay supply device becomes compacted due to the weight of the clay itself in the hopper, its density naturally varies. Affected by the amount of clay stored in the hopper. However, with the above configuration, the amount of clay stored in the hopper was not necessarily constant;
It was not possible to make uniform the density of the clay flowing from the hopper into the clay storage section of the clay supply device, and hence the density of the clay supplied into the formwork. Moreover, since a large amount of clay is stored in the hopper, when the clay in the hopper flows into the clay supply device, a so-called bridging phenomenon is likely to occur, in which a cavity is created in the hopper. The rapid and uniform flow of clay into the device is obstructed, and the clay supplied into the mold becomes even more uneven.

In addition, conventionally, the clay supply device was moved onto the formwork while the lower mold was lowered, so the clay was sequentially filled from the clay supply device side in the formwork. There was a problem in that it was difficult for the filling state to be uniform throughout the entire area of the mold.

Therefore, the first object of the present invention is to provide a clay for refractories that can always supply uniform clay throughout the entire area of the mold and prevent the formation of non-uniform molded bodies. To provide molding equipment.

[Means for Solving the Problems] In order to solve the above-mentioned problems, the present invention provides (a) a clay storage amount detection device that detects the clay volume in the hopper, and a clay suspension amount in the hopper. A clay charging device is provided that charges clay into the hopper when the clay is below a predetermined value, so that a predetermined meter of clay, which is approximately several times the volume of the clay storage section of the clay supply device or less, is always stored in the hopper. None, and (b) the clay supply device is moved over the formwork when the lower die is in the raised position where it is flush with the formwork and the road surface, and then moves back and forth as the lower die descends to feed the clay into the mold. It is characterized by its structure, which is supplied within a frame.

[Function] With the configuration (a) above, the amount of clay stored in the hopper and the compacted state of the clay in the hopper are made constant, so the density of the clay supplied into the formwork is made uniform. Further, since excess G of clay is not stored in the hopper, the bridging phenomenon is less likely to occur, and the clay can flow more uniformly and quickly from the hopper to the clay supply device.

With the configuration (b) above, the clay in the clay storage section of the clay supply device is supplied all at once into the formwork as the lower die descends, so the clay is not deposited into the formwork. The filling condition becomes uniform throughout the entire area within the formwork.

Furthermore, the reciprocating movement of the clay supply device smoothes out the clay that has fallen into the mold, making the filling state of the clay more even.

Due to these synergistic effects, the density of the clay within the mold becomes uniform, and the filling state becomes even, thereby drastically reducing molding defects.

[Example] An embodiment of the present invention will be described below with reference to the drawings.

Reference numeral 1 denotes a formwork in which a main mold 2 is provided so as to be movable up and down by a lower ram 3. When the lower mold 2 descends from the raised position shown by the solid line in FIG. 1 to the lowered position (not shown by the two-dot chain line), a cavity is formed in the mold 1. 4
is an upper mold that can enter into the formwork 1, which is fixed to the lower end of the upper ram 5 and enters into the cavity of the formwork 1 as the upper ram 5 descends. On the other hand, reference numeral 6 denotes a clay supply device in the form of a flat box, which is movable on a base 7 installed flush with the formwork 1, and is driven by a drive device (not shown) as shown in FIG. It is moved in the left-right direction in the figure between the standby position shown in FIG. 2 and the advanced position shown in FIG. Specifically, as shown in FIG. 1, the clay supply device 6 is moved to the advanced position when the lower mold 2 is in the raised position, and then the clay supply device 6 is moved as the lower mold 2 is lowered. Lower mold 2 with a stroke of 1/3 to 1/6 of the long dimension along the direction (indicated by △ in Figure 1)
is reciprocated a predetermined number of times until it is completely lowered, and then returns to the standby position. A clay storage section 8 is provided in the front half of the advancing end of the clay supply device 6.

The clay storage section 8 has a plurality of small chambers that are open at the top and bottom, and this is formed by partitioning the opening 6a formed in the clay supplying device 6 along a direction perpendicular to the moving direction of the clay supplying device 6. Board 9
It is formed by accommodating a partition lattice 10 having. Note that the partition grid 10 is removable from the clay supply device 6, and can be replaced with one according to the dimensions of the molded product.

Now, 11 is a hopper, which is located above the clay supply device 6 in the standby position.
When the clay is returned to the standby position, the clay stored therein is allowed to flow into the clay storage section 8 of the clay supply device 6. A level sensor 12 constituting a clay storage mother detection device is provided on the side wall of the hopper 11, and the level sensor 12 can detect the amount of clay stored in the hopper 11. 13 is a clay storage tank, 14 is a clay storage tank 1
This is a belt conveyor serving as a clay charging device for charging the clay in 3 into the hopper 11. The level sensor 12
When it is detected that the amount of clay stored in the hopper 11 has become several times, for example, three times or less, the volume of the clay storage section 8 of the clay supply device 6, the belt conveyor 14 is driven to remove the clay. The clay in the storage tank 13 is put into the hopper 11.

As a result, the amount of clay stored in the hopper 11 is always maintained at a predetermined amount that is approximately three times the volume of the clay storage section 8. Note that the hopper 11 is removable and can be replaced depending on the dimensions of the molded product. 15 is a moisturizing cover for preventing the clay on the belt conveyor 14 from drying out.

According to the above configuration, since a certain amount of clay is always stored in the hopper 11, the degree of consolidation of the clay itself due to the m matrix is always constant. Therefore, the density of the clay flowing into the clay storage section 8 and the density of the clay supplied to the cavity of the formwork 1 are always constant. In addition, since the amount of clay stored in the hopper 11 is relatively small, approximately several times the volume of the clay storage section 8, the so-called bridging phenomenon that does not occur when a large amount of clay is stored. Therefore, the clay flows quickly and uniformly into the clay storage section 8.

Then, the clay uniformly stored in the clay storage section 8 in this way is supplied into the cavity of the formwork 1 when the clay supply device 6 is moved to the advanced position and the lower mold 2 is lowered. (See Figure 2). In this case, since the lower mold 2 is configured to descend only after the clay supply device 6 reaches the advanced position on the formwork 1, the clay in the clay storage section 8 is almost simultaneously moved into the cavity over the entire area. Flows into the cavity, filling the cavity evenly over the entire area.

In addition, while the lower mold 2 is performing an untimely operation, the clay supplying device 6 reciprocates with a predetermined stroke, so that the clay supplied into the cavity passes through the partition plate 9 of the clay supplying device 6. This makes it possible to more reliably obtain an even filling state within the cavity.

Thereafter, as shown in FIG. 3, when the clay supply device 6 returns to the standby position, the upper mold 4 enters the cavity, and the clay in the cavity is compressed and molded into a predetermined shape. Next, the upper mold 4 is raised, and the lower mold 2 is also raised to a raised position flush with the mold 1 to take out the molded product, and the above-mentioned cycle is repeated to continuously form molded products. be able to.

In particular, in this embodiment, since the belt conveyor 14 is provided with the moisturizing cover 15, excessive drying of the clay introduced from the clay storage tank 13 into the hopper 11 by the belt conveyor 14 can be prevented. can be prevented. This makes it possible to maintain the moisture content of the clay within the optimum range of, for example, 1 to 6% by weight, to reliably prevent the generation of secondary particles and the bridging phenomenon, thereby achieving a more uniform filling state of the clay. I can do it. Further, in the above embodiment, since the partition grid 10 is detachably attached to the clay supply device 6, it can be replaced depending on the dimensions of the molded product.

For this reason, for example, when using a partition grid that is larger than the dimensions of the molded product, clay may remain on the outer periphery of the partition grid and solidify, or may be scattered on the base 7, and may also solidify. The clay tends to fall into the cavity by mistake, resulting in molding defects, and extra clay is required, resulting in waste.In contrast, in this embodiment, a partition grid with the same dimensions as the groove is used. This makes it possible to reliably prevent molding defects and waste caused by residual clay.

[Effects of the Invention] As described above, the present invention can stabilize the amount of clay stored in the hopper, suppress changes in the compaction state of the clay, and prevent the bridging phenomenon in the hopper. This makes it possible to equalize the density of the clay flowing into the clay supply device.
Moreover, since the lower mold is lowered and the clay supply device is reciprocated while the lower mold is being lowered, the clay can be uniformly filled into the mold over the entire area. As a result, the occurrence of molding defects can be significantly suppressed, and the quality of the product can be greatly improved.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, in which Fig. 1 is a schematic longitudinal cross-sectional view of the whole, Fig. 2 is a partial longitudinal cross-sectional view showing the state of supply of clay into the formwork, and Fig. 3 is a compression molding. It is a partial longitudinal cross-sectional view which does not show a state. In the drawing, 1 formwork, 2 lower mold, 4 upper mold, 6 clay supply device, 8 clay storage section, 9 partition plate, 11 hopper, 1
2 is a level sensor (a clay storage amount detection device), 13 is a clay storage tank, and 14 is a belt conveyor (a clay feeding device).
, 15 is a moisturizing cover.

Claims (1)

[Scope of Claims] 1. A clay supplying device having a mold having a vertically movable lower mold therein and a clay storage section consisting of a plurality of small chambers opened at the top and bottom, and the clay supplying device. and a hopper for storing clay to be stored in the clay storage section, and after moving the clay supplying device onto the mold and supplying the clay into the mold, the lower mold and the inside of the mold are provided. In the device for compressing and molding the clay between the upper mold entering the hopper, there is a clay storage amount detection device for detecting the amount of clay in the hopper, and a device for detecting the amount of clay stored in the hopper when the amount of clay is below a predetermined value. A clay feeding device for feeding clay into the hopper is provided so that a predetermined amount of clay, which is approximately several times the volume of the clay storage section or less, is always stored in the hopper, and the clay feeding device is provided. , when the lower mold is in a raised position where the upper surface of the mold is flush with the road surface, the mold is moved onto the lower mold, and then the clay is moved into the mold while reciprocating as the lower mold lowers. 1. A molding device for clay for refractories, characterized in that it is configured to supply clay for refractories. 2. The apparatus for molding clay for refractories according to claim 1, wherein the clay feeding device is constituted by a belt conveyor, and this is provided with a moisturizing cover for preventing drying of the clay. 3. The fireproofing device according to claim 1 or 2, wherein the reciprocating stroke of the clay supply device is 1/3 to 1/6 of the long dimension of the molded product along the moving direction of the clay supply device. A molding device for clay for materials. 4. The clay molding device for refractories according to any one of claims 1 to 3, wherein the clay storage section is configured to be detachable from the clay supply device.