JPH10315212A - Mold for forming hydraulic inorganic molded products - Google Patents

Abstract

(57) [Summary] [PROBLEMS] To suction excess water in a hydraulic inorganic composition,
Even in the molding method of dehydration, when stacking molded products,
Provided is a mold for molding a hydraulic inorganic molded article, in which a projection does not become a hindrance and a molded article can be manufactured with a small amount of raw materials. SOLUTION: One mold 1 has a mold body having a plurality of suction holes 5 provided on a mold surface, and a small hole 7 communicating with the suction holes 5. , The other mold 2
And a draining plate 6 forming a cavity 4 for supplying the hydraulic inorganic composition in a closed state. The draining plate 6 has a surface on which the cavity 4 is formed and an outer periphery of the small hole 7. A large number of projections 8 and 9 are provided toward it.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mold for molding a hydraulic inorganic molded article.

[0002]

2. Description of the Related Art Conventionally, a hydraulic inorganic molded product mainly composed of water, cement or the like and, if necessary, a reinforcing fiber is added to a molded product such as a roof tile using a pair of molds that can be opened and closed. Molding is known. In such molding,
In a device provided with a plurality of suction holes on one mold surface,
There is known a cement tile manufacturing apparatus in which a drainage iron plate having a large number of small holes is attached in contact with a suction hole, and water is sucked from the small hole through the suction hole to be able to squeeze water (Japanese Utility Model Laid-Open No. 55-5).
8311).

As shown in FIG. 5, the molding die comprises an upper die a, which is one of the molds that can be opened and closed, and a lower die b, which is the other die. Is vertically movable with respect to the lower mold b.

When the upper mold a and the lower mold b are closed, a plurality of vacuum suction holes c are formed on the lower surface of the upper mold a so that the hydraulic inorganic composition can be filled, pressurized, and squeezed under low pressure. And a draining iron plate d having a number of small holes is attached in contact with the vacuum suction holes c on the lower surface of the upper die a. The water squeezed from the small holes through the vacuum suction holes c is discharged through the water squeezing passage holes e, so that excess water in the filled hydraulic inorganic composition can be dewatered.

[0005]

In this molding die, a hydraulic inorganic composition is filled between a draining iron plate d and a lower die b, and water is squeezed from a small hole through a vacuum suction hole c while pressurizing. At this time, since the hydraulic inorganic composition penetrates into the small holes, projections called so-called "water-squeezing ribs" project on the back surface of the obtained molded article. When the protrusions are stacked for storing or transporting the molded products, they hit the surface of another molded product, and there is a problem that the decorative surface is damaged. Furthermore, the presence of the projections increases the amount of forming raw material, leading to an increase in product cost.

The present invention solves the above-mentioned problems, and even in a molding method in which excess water in a hydraulic inorganic composition is sucked and dehydrated, projections do not become an obstacle when stacking molded articles. An object of the present invention is to provide a mold for molding a hydraulic inorganic molded article, which can produce a molded article with a small amount of raw materials.

[0007]

A mold for molding a hydraulic inorganic molded article of the present invention (hereinafter sometimes simply referred to as a "mold") comprises a pair of molds that can be opened and closed. The mold has a mold body provided with a plurality of suction holes on the mold surface, a small hole communicating with the suction holes, and a cavity for supplying the hydraulic inorganic composition in a state of being closed with the other mold. And a plurality of projections facing the cavity on the surface forming the cavity and on the outer periphery of the small hole.

In the present invention, the hydraulic inorganic composition is a hydraulic inorganic substance which is hardened by a hydration reaction of cement, gypsum, calcium silicate, or the like, and a hydraulic inorganic substance which is hardened to impart fluidity. As necessary, mineral fiber, inorganic fiber such as glass fiber, animal and plant fiber, synthetic fiber, semi-synthetic fiber, organic fiber such as regenerated fiber, sand as aggregate, etc. Gravel, quick setting agent,
It contains pigments and the like.

In the present invention, the shape of the projection formed on the draining plate may be cylindrical or prismatic. Further, the projections may be connected to each other.

(Function) The mold for molding a hydraulic inorganic molded article of the present invention comprises a pair of molds which can be opened and closed. One mold has a mold body provided with a plurality of suction holes on the mold surface. A draining plate having a small hole communicating with the suction hole and forming a cavity for supplying the hydraulic inorganic composition in a state of being closed with the other mold, and forming a cavity in the draining plate. Since a large number of projections are provided on the surface toward the cavity, the supply of the hydraulic inorganic composition is reduced by that much, which leads to a reduction in the cost of the molded product.

Further, since a large number of protrusions are provided on the outer periphery of the small hole toward the cavity in the draining plate, a concave portion corresponding to the protrusion is formed in the obtained molded product. For this reason, the projections formed on the molded article when the excess water in the hydraulic inorganic composition is sucked from the suction holes are accommodated in the recesses and do not protrude from the surface of the molded article.

[0012]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a longitudinal sectional view showing one example of a mold for molding a hydraulic inorganic molded article of the present invention. FIG. 2A is a plan view showing a drainer plate of the molding die of FIG. 1, and FIG. 2B is a front view thereof.

In FIGS. 1 and 2, reference numeral 1 denotes an upper mold as one mold, 2 denotes a lower mold as the other mold, 3 denotes a mold for fixing the lower mold 2, and 4 denotes an upper mold 1 and a lower mold. A cavity for supplying a hydraulic inorganic composition between the cavity and the base 2, a suction hole 5 provided in the upper mold 1, a drain plate 6 provided with a filter cloth 6 a, and a small plate 7 provided in the drain plate. The holes 8 are projections provided on the outer periphery of the small holes 7, and 9 are projections provided on the surface of the draining plate forming the cavity.

The mold for molding the hydraulic inorganic molded article comprises an upper mold 1 and a lower mold 2 which can be opened and closed. The upper mold 1 is moved to the lower mold 2 by a molding device (pressing device) not shown. It can be moved up and down. The lower mold 2 is fixed to a molding device (pressing device) (not shown) by a mold frame 3. The upper mold 1 and the lower mold 2 are closed to form a cavity 4 for supplying the hydraulic inorganic composition.

The upper mold 1 has a mold body having a plurality of suction holes 5 provided on the mold surface, and a small hole 7 communicating with the suction holes 5.
A draining plate 6 forming a part of a cavity 4 for supplying the hydraulic inorganic composition in a state of being closed with the lower mold 2, wherein the draining plate 6 has a surface on which the cavity 4 is formed and the small holes 7. A large number of protrusions 8, 9
Is provided.

The suction hole 5 is formed by a suction machine (not shown).
Excess water of the hydraulic inorganic composition supplied into the cavity 4 is drained.

In order to obtain a molded product using the mold for molding a hydraulic inorganic molded product of the present invention, as shown in FIG. After the draining plate 6 is attached, the cavity 4 is lowered by a pressing mechanism (not shown) and closed with the lower mold 2 to form the cavity 4, and sufficient for filling the inside of the cavity 4 using a supply pump from a tank (not shown). Press in the quantity of hydraulic mineral composition.

After the hydraulic inorganic composition is pressed into the cavity 4, the air in a number of drain holes 5 formed in the upper mold 1 is discharged by a suction machine (not shown), and the inside of the drain hole 5 is depressurized. To Then, surplus water of the hydraulic inorganic composition supplied into the cavity 4 is discharged from the small holes 7 through the drain holes 5 and from drain holes (not shown) provided at appropriate places.

At this time, since the hydraulic inorganic composition bites into the small holes 7 together with the filter 6a, projections are formed on the back surface of the obtained molded product. The height of the projection 8 provided on the outer periphery of the small hole 7 is also higher than the height of the projection formed on the molded product.

FIG. 3 is a sectional view showing an example of a hydraulic inorganic molded product obtained by using the molding die of the present invention.
FIG. The recesses 1 corresponding to the projections 8 and 9 of the draining plate 6 of the molding die are provided in the hydraulic inorganic molded product 12.
0 and 11 are formed. Since the height of the projection 10a of the molded product that has penetrated the small hole 7 of the draining plate 6 is made lower than the height of the concave portion 10 corresponding to the projection 8 of the draining plate 6, the projection 10a of the molded product is And the molded article 12
Does not protrude from the surface.

[0021]

【Example】

Using a mold for forming a hydraulic inorganic molded article shown in FIG. 1, 600 protrusions 9 having small holes 7 shown in FIG. 2 (interval of 30 mm in length direction, interval of 10 mm in width direction, height of 1 mm) , 5 mm in diameter, 3 mm in diameter of the small hole 7, 1200 projections 8 on the surface forming the cavity 4 (15 mm interval in the length direction, 10 mm interval in the width direction, 1 mm in height, 5 mm in major axis, 3 mm in minor ellipse) Draining plate (60)
0 × 400 mm) is attached to the upper mold 1, and a hydraulic inorganic composition having a specific gravity of 1.8 is filled in the cavity 4 and press-fitted, and then the air in a number of drain holes 5 formed in the upper mold 1 is removed. The water is discharged by a suction device (not shown), the inside of the drain hole 5 is depressurized, and excess water of the hydraulic inorganic composition supplied into the cavity 4 is provided at an appropriate position from the small hole 7 through the drain hole 5. From the drain hole (not shown). The weight of the obtained hydraulic inorganic molded article was 3.95 kg,
The weight was reduced by 50 g as compared with that formed using a draining plate having no. Further, the protrusions 10a of the obtained hydraulic inorganic molded product were accommodated in the concave portions 10 and did not protrude from the surface of the molded product 12.

[0023]

According to the present invention, since the mold for forming a hydraulic inorganic molded article according to the present invention is constructed as described above, when the molded articles are stacked, the projection does not become a hindrance and the molded article is formed with a small amount of raw material. Can be manufactured.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view showing one example of a mold for molding a hydraulic inorganic molded article of the present invention.

FIG. 2 (a) is a plan view showing an example of a drain plate used for a molding die of the hydraulic inorganic molded article of FIG. 1,
(B) is a front view thereof.

FIG. 3 is a cross-sectional view showing one example of a hydraulic inorganic molded product obtained by using the molding die of the present invention.

FIG. 4 is an enlarged view of a main part of the hydraulic inorganic molded article shown in FIG.

FIG. 5 is a longitudinal sectional view showing an example of a conventional mold for molding a hydraulic inorganic molded article.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 One mold (upper mold) 2 The other mold (lower mold) 4 Cavity 5 Suction hole 6 Drain plate 7 Small hole 8, 9 Projection

Claims (1)

[Claims] 1. A mold comprising a pair of molds capable of being opened and closed, one of which has a mold body provided with a plurality of suction holes on a mold surface, and a small hole communicating with the suction holes, and And a draining plate forming a cavity for supplying the hydraulic inorganic composition in a state in which the mold is closed. A mold for forming a hydraulic inorganic molded article, characterized by having projections.