JP2000061914A - Method for molding concrete container and concrete container - Google Patents

Abstract

PROBLEM TO BE SOLVED: To dispense with a frame whose manufacturing cost is higher and ensure the easy availability of a container of an optional shape by forming the inner mold of a desired shape of the frame and applying a mortarlike material to the surface of the formed inner part to form a panellike body with a water drain hole opened in its part and further curing the mortarlike material to release the inner mold. SOLUTION: The inner mold 1 of a frame is formed on a platen 2 of a metal, wood or plastic or an interlayer 3 such as a plywood placed on the platen 2. The inner mold 1 of the frame is formed by using an already made product or a frame for manufacturing the inner mold 1. Further the inner mold 1 can be formed of rubber, plastic, wood or the like. The inner mold 1 is formed by filling the frame, the already made product or the like with sand and pressing it. A mortarlike material is applied to the surface of the inner mold 1 in an appropriate thickness and the inner mold 1 is coated to obtain the panellike body. Thus a wood plug is driven or a through hole is drilled after molding the panellike body so that a water drain hole 6 is formed at a desired spot. Finally the moldings are released from the frame.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for molding a plate-like body such as a concrete container and a planter, and a container.

[0002]

2. Description of the Related Art Conventional concrete products are manufactured by forming a frame such as a mold or a wooden mold as an inner frame and an outer frame, injecting concrete into both frames, and hardening it over time. It was formed by the process of removing the frame.

[0003]

Therefore, the formation of a mold is an essential condition, and this mold requires a great deal of cost. For this reason, it is suitable for use in a large-scale molded product with a fixed shape, but it could not be used for small-quantity production. Further, although the molded product is suitable for forming a uniform product, it is difficult to apply it to a product requiring individuality such as a tasteful planter.

[0004]

Therefore, in the present invention, a molded product having a free shape based on a free idea is easily provided without requiring a mold such as a metal mold or a wooden frame which is expensive to manufacture. It is intended to propose a concrete container molding method and container in which the forming material for the inner mold, which can replace the formwork, has a good effect on the product and helps the creative formation of the surface. First, the inner mold To form a desired shape, a mortar-like material is applied on the formed inner mold to form a plate-like body having an appropriate thickness, and a drainage hole is partially formed, and a mortar-like material. It is characterized in that it comprises a step of curing the inner mold and a step of removing the inner mold. Secondly, the inner side is formed into a desired inner surface shape corresponding to the inner mold, and a mortar-like material is applied, and an appropriate thickness is applied. Formed into a disc-shaped body and cured, and a drainage hole was formed in a part of it And wherein the door.

[0005]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention will be described in detail below with reference to the embodiments shown in the drawings. First, as the inner mold 1, natural sand, artificial sand, crushed stone, or a mixture thereof is used as a material. It is kneaded with water or a mixture of it and a thickener to maintain the strength capable of maintaining the shape of the inner mold 1.

The inner mold 1 is formed on a surface plate 2 made of metal, wood, plastic or the like, or an insole 3 such as plywood placed on the surface plate 2. For this production, a ready-made product or a frame body for producing an inner mold can be used. It can also be made of rubber, plastic, wood or the like. These frames, ready-made products, etc. are filled with the sand or the like and pressed.

The shape of the inner mold 1 forms the inner surface shape of the container 4, and generally has a desired hemispherical shape, a semi-elliptical shape, or an appropriate height of a medium-high shape such as a petal. It goes without saying that various desired shapes can be selected. Also, the inner mold 1
It is also possible to make it with rubber, plastic, wood, etc.

A mortar-like material is applied onto the inner mold 1 to form a disc-shaped body 5 having a proper thickness and covering the inner mold 1. The mortar-like material is composed of cement, aggregate, necessary admixture, and necessary reinforcing material. The aggregate is JASS5
, JIS A5002 standard, blast furnace slag sand, lightweight aggregate, crushed sand for building materials, etc. can be used. As the admixture, a water reducing agent, a foaming agent, a waterproofing agent, a viscous agent, a polymer, a coloring agent or the like can be selected and used as desired. As the reinforcing material, iron wire, PC hard steel wire, glass fiber net or cloth can be used, but the glass fiber can also be mixed in the aggregate as chopped strands. The glass fiber is preferably an alkali resistant glass fiber containing 16% or more of zirconia, and is constituted so that a desired strength can be obtained by mixing 1% or more and 3% or less of the aggregate by weight.

[0009] The aggregate and the cement ratio of the board 5 are
The range is 0 to 2.5 by weight. The ratio of water to cement is preferably reduced as much as possible by using a water reducing agent or the like. The admixture ratio is preferably 6.0% or less for the inorganic admixture material and 1.65 or less for the organic admixture material by weight.
For mixing the mortar-like materials, use a forced kneading mixer or an omni mixer and sufficiently mix them so as to be uniform.

Without dry mixing. First water,
Add cement, aggregate and necessary admixtures. Scraping interrupts mixing and is done as quickly as possible. Mortar-like material, after kneading, add chopped stride and mix.

When the mortar-like material is applied onto the inner mold 1, a wood trowel and a metal trowel are used from the base of the inner mold 1 to apply the mortar-like material so that the density is uniform, and gradually rise to the upper part. I will mold it. For large products, reinforcement bars, glass fiber nets, and cloths may be embedded, but in that case, they can be set in the center of the mortar-like material and applied. In addition, when an aggregate different from the mortar-like material is added to the surface of the plate-shaped body 5, the aggregate is pressed against the mortar-like material on the surface of the molded plate-shaped body 5 with a trowel or the like. Should be embedded.

In this way, after the board 5 has been molded, in order to form the drain holes 6 at desired positions, a wooden plug or the like is driven in or a through hole is formed. After completion of these operations, it is preferable to cover the whole with wet sand for water retention and water supply. Next, curing is performed, but natural curing may be performed. In winter, sheet curing and steam curing are recommended.

Next, the mold is removed. First, remove the sand, then use a spatula,
Insert a burl or the like between the surface plate and the product and put a finger in the drain hole 6 to lift the container 4. After demolding, the inside and outside of the container 4 are washed with water. If glass fibers adhere to the container 4, the container 4 is burned off using a gas burner or the like. Further, the container 4 is subjected to secondary curing as required to obtain a product.

[0014]

According to claims 1 and 2 of the present invention as described above, the step of forming the inner mold into a desired shape, and applying a mortar-like material to the formed inner mold to obtain an appropriate thickness. Forming a disc-shaped body, forming a drainage hole in a part, curing the mortar-like material, and removing the inner mold,
The inner mold is made of natural or artificial crushed stone, sand or other granular or powdery material, and is kneaded with water to have an appropriate hardness, so there is no need for a mold with high production costs. It is possible to form a free-type container extremely easily, to freely form container-shaped products such as planters, and to obtain a wide variety of products according to the taste of the user.

Further, if the inner mold has a structure such as sand hardened with water, wet curing of the plate-like body can be obtained, and the curing conditions thereof are advantageous. Further, by sticking or pressing these sands to the disc-like body, a different surface is formed and a creative outer surface can be created.

According to a third aspect of the present invention, the inner side is formed into a desired inner surface shape corresponding to the inner die, a mortar-like material is applied, and the mortar-like material is formed to an appropriate thickness to form a disc-shaped body. Since it is hardened and a drain hole is formed in a part of it, in addition to the hardening described in claim 1, the water: cement ratio can be reduced and high strength can be obtained compared to concrete formed by a formwork. .

Further, according to claim 4, since sand and crushed stone forming an inner mold are attached to the inner surface of the container, an outer surface shape different from ordinary concrete can be obtained and a creative outer surface is formed. There is an effect that can be done.

Further, according to the fifth aspect, since the plate-like body forming the container is filled with a reinforcing material such as glass fiber or reinforcing bar,
It has the effect of obtaining the strength of concrete and obtaining a container such as a large planter.

[Brief description of drawings]

FIG. 1 is a front view showing one process of a molding method of the present invention.

FIG. 2 is a partially longitudinal front view showing a process following FIG.

FIG. 3 is a vertical sectional front view of a product formed by the same molding method.

FIG. 4 is a perspective view of the product of the present invention.

[Explanation of symbols]

1 Internal type 2 surface plate 3 Insoles 4 containers 5 board 6 drainage holes

Claims (5)

[Claims] 1. A step of forming an inner mold into a desired shape, and a mortar-like material is applied to the formed inner mold to form a plate-shaped body having an appropriate thickness, and a drain hole is formed in a part of the body. A method for molding a concrete container, which comprises a step of curing, a step of hardening a mortar-like material, and a step of removing an inner mold. 2. The inner mold is made of a granular or powdery material such as natural or artificial crushed stone and sand, and is kneaded with water to have an appropriate hardness. The method for molding a concrete container according to. 3. An inner surface is formed into a desired inner surface shape corresponding to an inner mold, and a mortar-like material is applied to form an appropriate thickness to form a plate-like body and hardened. A concrete container having a drain hole formed therein. 4. The concrete container according to claim 3, wherein sand and crushed stone forming an inner mold are attached to the inner surface of the container. 5. The plate-like body forming the container is made of glass fiber,
The concrete container according to claim 3, further comprising a reinforcing material such as a reinforcing bar.