JP2000190095A - Dewatering plate and press dewatering device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To facilitate maintenance, and reduce maintenance costs and a production loss by restraining clogging. SOLUTION: This device is equipped with first and second plate members 112, 113 on which plural dewatering holes 111 are formed in a manner to penetrate through from the surface to the back face. To the first plate member, fibers 114 are implanted on the surface except for the dewatering holes, and the first and second plate members are overlaid while each dewatering hole is displaced. One part 144a of the fiber implanted on the first plate material surface is inserted in the dewatering hole of the second plate member, and the other part 114b of the fiber is sandwiched between the first and second plate members.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a dewatering plate and a press dewatering device. For more information,
The invention of this application relates to a dewatering plate capable of suppressing clogging, facilitating maintenance, and reducing maintenance costs and production loss, and a press dewatering device including the same.

[0002]

2. Description of the Related Art Conventionally, cement-based inorganic molded products such as architectural plates and accessories have been formed by performing a dehydration press such as a direct pressure type. The mortar of the material is, for example, a mixture of cement, aggregate, fly ash, and organic fibers in a predetermined ratio, and if necessary, additional ingredients such as a thickener and a water reducing agent, and kneaded with water to obtain water. / Cement ratio is 30 ~
It is adjusted to 50%. Then, a predetermined amount of the mortar is supplied to a press dewatering device.

FIG. 3 shows a press dewatering apparatus, for example. The press dewatering device includes an upper mold (1) and a lower mold (2). These upper mold (1) and lower mold (2)
Can be arranged, for example, in the upper frame (3) and the lower frame (4), respectively. In this case, both the upper mold (1) and the upper frame (3) can be moved up and down, and the upper mold (1) can be slid into contact with the inside of the upper frame (3). As shown in FIG. 3, the lower mold (3) has a plurality of drain holes (5) for discharging the water squeezed out of the mortar during dehydration pressing to the outside. Is provided with a dehydrating plate (6). This dehydrating plate (6)
It has water permeability.

[0004] In the dewatering press, the mortar is supplied between the upper die (1) and the lower die (2), for example, onto a molding surface of a lower die (3) on which a dewatering plate (6) is arranged, and the upper die is formed. (2) is lowered toward the lower mold (3), and a pressure of approximately 50 to 100 kgf / cm ² (actual pressure) is applied to the mortar between the lower mold (3). The water squeezed out of the mortar is dewatered (6)
Flows into the drain hole (5) formed in the lower mold (3) and is discharged to the outside.

[0005]

However, in the conventional press dewatering apparatus, if the dewatering press such as the direct pressure type is continued, the dewatering ability gradually decreases, which is reflected in the shape retention of the dewatered product. was there. The cause is that clogging occurs in the dehydrating plate (6). The dehydrating plate (6) has water permeability as described above. Generally, the dehydrating plate (6) has a dehydrating hole (6) as illustrated in FIG.
1) a dewatering substrate (62) having a plurality of formed thereon, a wire mesh (63) on the surface thereof, and a dewatering cloth (64) laid thereon; and the wire mesh (63) and the dewatering cloth (64) are dewatered. The left and right ends of the substrate (62) are woven and attached to the dewatering substrate (62). The dewatering cloth (64) is generally a cloth having a thickness of 2 mm woven from fibers such as polypropylene. The water squeezed out of the mortar by the dewatering press contains solids, and this is the dewatering cloth (64). And the fibers of the dewatering cloth (64) are crushed by the pressure during the dewatering press. As a result, the dewatering cloth (6)
Clogging occurs in 4).

Therefore, conventionally, when the dewatering ability of the press dewatering device is lowered due to a decrease in the shape retention of the dewatered product, the dewatering cloth (64) is replaced. However, changing the dewatering cloth (64) was never preferred. This is because the dewatering cloth (64) is knitted together with the wire mesh (63) on the dewatering substrate (62) as described above, so that the dewatering cloth (64) is not easily removed and attached. In addition, dewatering cloth (64)
Was also relatively expensive. Furthermore, it is pointed out that the maintenance of replacing the dewatering cloth (64) temporarily stopped the production of the cement-based inorganic molded product, resulting in a production loss.

The invention of this application has been made in view of the circumstances described above, and eliminates clogging that occurs in a dewatering plate, suppresses clogging, facilitates maintenance, and reduces maintenance cost and cost. It is an object of the present invention to provide a dewatering plate capable of reducing production loss and a press dewatering device having the same.

[0008]

Means for Solving the Problems According to the invention of the present application, there is provided a first and a second plate having a plurality of dehydration holes formed penetrating through the front and back surfaces. Fibers were implanted on the surface of the plate except for the dewatering holes, and the first and second plates were superposed with the positions of the dewatering holes shifted from each other, and were implanted on the surface of the first plate. A part of the fiber is inserted into the dewatering hole of the second plate, and the other fiber is sandwiched between the first and second plate. I do.

The invention of this application is also a press dewatering apparatus that includes an upper die and a lower die, and pressurizes and dehydrates mortar supplied between the upper die and the lower die to form the mortar. Is disposed on the molding surface of the lower mold, and a press dewatering apparatus (claim 2) is also provided. Hereinafter, the dewatering plate and the press dewatering device of the present invention will be described in more detail with reference to the drawings.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a cross-sectional view of an essential part showing an embodiment of a dewatering plate of the present invention. As shown in FIG. 1, the dewatering plate (11) of the invention of the present application has first and second plate bodies (112) and (113) in which a plurality of dewatering holes (111) are formed penetrating the front and back. It has. Of these two plates (112) and (113), the first plate (1)
12) has fibers (1) on the surface excluding the dehydration holes (111).
14) is planted. Then, the first and second plate bodies (112) and (113) are superimposed on each other while displacing the positions of the dewatering holes (111), so that the dewatering plate (1) is formed.
1) is formed. In a state where the two plate members (112) and (113) are overlapped, a part of the fiber (114) implanted on the surface of the first plate member (112) is replaced with the second plate member (1).
13) is inserted into the dehydration hole (111). The fibers (114) inserted into the dehydration holes (111) of the second plate (113) as described above are, specifically, the second plate (11).
The fiber (114a) is located at or near the dehydration hole (111) of 3). On the other hand, the fibers (114b) located in other areas are the first and second plates (11b).
2) sandwiched between (113); Such insertion and insertion of the fiber (114) can reduce the apparent density of the fiber (114) in the dewatering plate (11) by the first plate (1).
12) Increase the actual density compared to the actual density of the hair implanted on the surface.

The first and second plates (112) (1)
In the state where 13) overlaps, the second plate (113) is disposed slightly above the first plate (112) due to the self-supporting property of the fiber (114). As a result, the dewatering plate (11) is moved from the dehydration hole (111) formed in the second plate (113) to the dehydration hole (11) in the first plate (112).
A water channel leading to 1) is formed. The water squeezed out of the mortar during the dewatering press can flow into the drain hole (5) of the lower mold (2) shown in FIG. 3 through this water passage.

As described above, the first and second plates (11)
2) (113) may be simply arranged in an overlapping manner, but if it is necessary to keep them mutually at a specific interval, a spacer is appropriately provided between these two plates (112) and (113). Can be provided. Also, a plate (112)
When it is desired to stably fix (113),
In particular, it can be fixed by simple fixing means such as a clip without using a large-scale fixing means. Unlike the conventional dehydrating plate (6) shown in FIG. 4, there is no need for a troublesome operation of knitting and attaching the wire mesh (63) and the dewatering cloth (64) to the left and right ends of the dewatering substrate (62).

In the dewatering plate (11) of the present invention, since the first and second plates (112) and (113) are subjected to pressure during the dewatering press, they have rigidity without deformation. Are preferable, and a metal plate is exemplified, for example. More preferably, a metal plate having corrosion resistance can be used. This is realized by selecting an appropriate metal type, or by performing corrosion-resistant processing on the surface. Also,
These two plates (112) and (113) are provided with a dehydrating plate (1).
In order to facilitate the production of 1) and to reduce the cost,
It is preferable that both are made of the same material and have the same size, shape, and plate thickness. The plate thickness can be appropriately determined, for example, from the relationship with strength, weight, and the like. In the case of a metal plate,
For example, 1 to 4 mm, more preferably 1 to 2 mm is exemplified.

There is no particular limitation on the diameter of the dewatering hole (111). Considering drainage, plate strength, etc.
When the pressure is reduced through the dewatering hole (5) of the lower mold (2) in the dewatering press in the press dewatering apparatus shown in (1), an appropriate hole diameter can be obtained in consideration of the pressure loss. Generally, 2 to 5φ, preferably 3φ is exemplified. The same applies to the pitch of the dewatering holes (111). However, if the first and second plate members (112) and (113) have the same pitch, it is easy to manufacture these two plate members (112) and (113), and dehydration is caused when they are overlapped. The position of the hole (111) can be easily shifted. The pitch of the dewatering holes (111) is set to two plates (112) and (113).
If the distance is set to be equal, the first plate body (112) on which the fibers (114) are planted, for example, as shown in FIG.
When the dewatering hole (111) is positioned with respect to the position, the position of the dewatering hole (111) of the second plate (113) to be superimposed on the hole is easily determined. In addition, the two plates (112) (1
13) are equal in size, the respective dehydration holes (11
1) naturally shifts its position. Preparation of the dehydrating plate (11) is further facilitated. The specific value of the pitch can be appropriately determined by considering the drainage property, the plate strength, the size of the plate, pressure loss, and the like, similarly to the hole diameter. Generally, about 20 to 40 mm is exemplified, and preferably 30 mm.

The material and length of the fiber 114 are not particularly limited. Various fibers can be applied. From the viewpoint of strength, price, and the like, synthetic fibers such as polypropylene, polyethylene, and nylon are preferably exemplified. The length is equal to the first and second plate bodies (112) (1).
It can be appropriately determined from the relationship with the plate thickness of 13). When the plate body (112) (113) has a plate thickness of 1 to 2 mm, the length of the fiber (114) can be about 3 to 5 mm. In this case, the first and second plate bodies (112) (11)
The spacing between 3) can be 1-2 mm and the fibers (1
14), a part thereof is inserted into the dewatering hole (111) of the second plate (113), and the others are the first and second dehydration holes.
Between the plate members (112) and (113), thereby increasing the apparent density.

For example, the dewatering plate (11) of the invention of the present application having the above-mentioned configuration includes an upper mold (1) and a lower mold (2), which are also illustrated in FIG. The mortar supplied between the lower molds (2) is depressurized and dewatered by pressurization, and can be arranged on the molding surface of the lower mold (2) of the press dewatering apparatus for molding. In the press dewatering apparatus shown in FIG. 3 which has been conventionally used, the dewatering plate (11) can be used instead of the dewatering plate (6). The invention of this application also includes a press dewatering apparatus having these configurations.

When the press dewatering apparatus of the invention of the present application was actually used for the production of a cement-based inorganic molded article such as a building plate or an accessory, the mortar having a water / cement ratio of 30 to 50% was added to a mortar of 50 to 100 kgf /. The dewatering press (11) was clogged with dewatering press and molded under a pressure of ² cm (actual pressure), and clogging did not occur on the dewatering plate (11) even at 800 shots when clogging of the dewatering cloth occurred with a conventional press dewatering device. Was.

Even if clogging may occur in the dewatering plate (11), such clogging does not occur as frequently as in the prior art. Therefore, production loss is reduced. Also, in case of unavoidable maintenance, the work is extremely easy as compared with the conventional dehydrating plate (6) shown in FIG. That is, in the dewatering plate (11) of the invention of this application, the second plate (113) is removed from the first plate (112), and the fibers (1) implanted in the first plate (112) are removed.
If 14) is washed, it can be used again. Maintenance costs can be kept low.

Of course, the invention of this application is not limited by the above embodiments. It goes without saying that various configurations are possible for the details of the configuration of the press dewatering device, including the first and second plates and fibers.

[0020]

As described in detail above, according to the invention of this application, clogging that occurs in the dewatering plate due to the dewatering press can be suppressed, and maintenance when clogging occurs becomes easy, and maintenance is facilitated. Production losses are reduced as well as costs.

[Brief description of the drawings]

FIG. 1 is a sectional view of a main part showing an embodiment of a dewatering plate of the present invention.

FIG. 2 shows first and second dehydrating plates of the invention of the present application.
FIG. 5 is a plan view of a main part showing the positional relationship between the plate body and the dewatering holes.

FIG. 3 is a sectional view schematically showing a press dewatering apparatus.

FIG. 4 is a cross-sectional view showing a conventional dewatering plate.

[Explanation of symbols]

 Reference Signs List 1 upper mold 2 lower mold 11 dehydrating plate 111 dehydrating hole 112 first plate 113 second plate 114, 114a, 114b fiber

Claims (2)

[Claims] 1. A first and a second plate body having a plurality of dehydration holes formed penetrating the front and back surfaces, wherein fibers are planted on the surface excluding the dehydration holes in the first plate body. The first and second plates are superimposed on each other with the positions of the dehydrating holes shifted from each other, and a part of the fibers planted on the surface of the first plate is inserted into the dehydrating holes of the second plate, and A dewatering plate, wherein the fibers are sandwiched between the first and second plate members. 2. A press dewatering apparatus comprising an upper die and a lower die, and pressurizing and dewatering and molding mortar supplied between the upper die and the lower die. A press dewatering device, which is disposed on a molding surface of a lower die.