JPH0411154A - Manufacture of precast concrete plate - Google Patents

Abstract

PURPOSE:To maintain thickness constantly, by scattering a foaming agent on the surfaces of block materials spread in order within a foaming mold frame, and spreading, within a concreting mold frame, unit members with their foaming bodies that are formed by foaming, facing downward, and placing concrete therein. CONSTITUTION:A plurality of block materials 15 having unevenness on their surfaces are spread in order within a foaming mold frame 19 with their backs facing downward. Next, the surfaces of block materials 15 are covered with a mold separation film 27, and then, a foaming agent solution is scattered in the upper portion space of the film 27. Next, the mold frame 19 is covered with a lid 31 having air holes 29, and then, the mold frame 19 is quietly placed until foaming is completed and unit members 35 having foaming bodies 33 are formed on the surfaces of block materials 15 through the film 27. And members 35 are taken out of the mold frame 19, and they are spread within a concreting mold frame 37 with foaming bodies 33 facing downward. In addition, concrete 39 is placed in the upper portion space of members 35, and cued.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method for manufacturing a precast concrete board, and particularly relates to a method for manufacturing a precast concrete board in which a large number of blocks having uneven surfaces are arranged. .

[Conventional technology]

Generally, an exterior curtain wall that forms the outer wall of a building is made of a precast concrete plate or a metal member.

Since the exterior curtain wall made of precast concrete plates is mainly made of concrete, various block materials such as stone, ceramic tiles, and crystallized glass can be used as finishing materials. It has the advantage of being easy to mold and relatively inexpensive.

Conventionally, the method for manufacturing such precast concrete boards is to lay out Styrofoam boards with indentations in advance to match the dimensions of blocks such as tiles on the bottom of the formwork, and then place the blocks with the block surface facing down. A method of fitting the blocks into one piece and pouring concrete on top of this to integrate the joints, or attaching rubber or wooden joints to the bottom of the formwork according to the dimensions of the block materials such as tiles. Methods such as fitting it in with the surface facing down and pouring concrete on top of it are used to integrate it.

[Problem to be solved by the invention]

However, in such conventional methods, there is a problem that it becomes extremely difficult to manufacture precast concrete plates when a block material such as a tile with a split surface is used as a decorative material. Ta.

In other words, block materials such as tiles that have a split surface are
Because the surface has relatively large irregularities and its thickness is indeterminate, the conventional method of laying the blocks face down on the bottom of a flat formwork or on a Styrofoam board, etc. There was a problem in that it was difficult to align the back surfaces to the same plane level, making it extremely difficult to manufacture a precast concrete plate of a predetermined shape.

The present invention was made to solve such conventional problems, and it is possible to easily and reliably align the back side of a block material, which has an uneven surface and an undefined thickness, to the same plane level. The purpose of the present invention is to provide a method for manufacturing precast concrete plates.

[Means for Solving the Problems] The method for manufacturing a precast concrete board of the present invention includes the steps of laying out a plurality of block materials having uneven surfaces in a foaming formwork with their back sides facing down, and A step of directly or indirectly spraying a foaming agent solution onto the surface of the foamed block material, a step of covering the foaming mold with a lid, and a step of leaving the foaming agent solution still until foaming is completed to form a unit member. a step of laying the unit member with the foam side facing down in a concrete formwork; and a step of pouring concrete in the upper space of the unit member and curing it to integrate the concrete and the unit member. It has the following.

[Function] In the method for manufacturing a precast concrete board of the present invention,
A plurality of blocks with uneven surfaces are laid out in a foam mold with the back side down, and the back sides of the blocks are the same in order to form a foam on the front side of the laid blocks. A unit member is formed in which the side of the foam opposite to the block material is at the same level.

Then, the foam of this unit member is placed in a concrete formwork with the foam facing down (and the block material is housed in a concrete formwork with the back side of the block material at the same level, and concrete is placed on the back side of this block material. After pouring and curing, the concrete and unit members are integrated.

[Example] Hereinafter, details of the present invention will be explained using the drawings.

In the method for manufacturing a precast concrete board of the present invention,
First, a unit member is formed, and concrete is cast and cured on this unit member.

That is, first, as shown in FIG. 1, a plurality of blocks 15 having unevenness 13 on the front surface 11 are laid out in a foaming form 19 with the back surface 17 facing downward.

The block materials 15 are made of tiles, stones, etc., and have large irregularities 13 on the surface 11, and the thickness of each block material 15 is different.

Further, the back surface 17 has a flat shape, and has a dovetail groove-shaped recess 21 formed therein.

The foaming formwork 19 is made of metal such as iron, for example, and is formed by providing a bottom surface 25 on a rectangular side plate 23 .

After that, as shown in FIG. 2, the foaming formwork 19
For example, on the surface of the block material 15 laid out inside,
A release film 27 made of polyethylene film is coated.

Thereafter, a foaming agent solution made of urethane foam, for example, is sprayed into the space above the release film 27 .

Immediately after this spraying, the foaming formwork 19 is placed in the air holes 2.
It is covered by a lid 31 having 9.

Thereafter, the foaming form 19 is left standing in this state until the foaming of the foaming agent solution is completed, and as a result, the block material 15
A unit member 35 having a foam 33 is formed on the surface 11 with a release film 27 interposed therebetween.

Thereafter, the unit members 35 are taken out from the foam formwork 19, and as shown in FIG. laid down.

After this, concrete 3 is placed in the upper space of the unit member 35.
9 is poured and cured, concrete 39 and unit member 3
5 are integrated, thereby manufacturing a predetermined precast concrete plate.

Therefore, in the method for manufacturing a precast concrete board of the present invention, the manufacturing process is such that a plurality of pro-concrete materials 15 having unevenness 13 on the surface 11 are laid out in a foaming form 19 with the back surface 17 facing downward. step, a step of spraying the foaming agent solution onto the surface 11 of the laid block materials 15 via the release film 27, a step of covering the foaming form 19 with the lid 31, and the foaming of the foaming agent solution is completed. a step of forming a unit member 35 by leaving it to stand still until the unit member 35 is formed; a step of laying the unit member 35 in a concrete formwork 37 with the foam 33 facing downward; and pouring concrete 39 in the upper space of the unit member 35. Cured concrete 39 and unit members 3
5, it is possible to easily align the back surface 17 of the block material 15, which has unevenness 13 on the surface 11 and whose thickness is indeterminate, to the same plane level. Become.

That is, in the method for manufacturing a precast concrete board of the present invention, a plurality of block materials 15 having irregularities 13 on the front surface 11 are laid out in a foam formwork 19 with the back surface 17 facing downward, and the laid block materials In order to form a foam body 33 on the front side of the block material 15, a unit member 35 is formed, in which the back side 17 of the block material 15 is the same plane rail, and the side of the foam body 33 opposite to the block material 15 is on the same plane level. is formed, and when this unit member 35 is laid in the concrete formwork 37 with the foam 33 facing downward, the block material 15 is accommodated in the concrete formwork 37 with the back surface 17 of the block material 15 on the same plane level. Then, concrete 39 is cast and cured on the back side of this block material 15, and the concrete 39 and unit member 35 are integrated, so the block material has irregularities 13 on the surface 11 and the thickness is indeterminate. 15 can be easily and reliably aligned to the same plane level.

In addition, in the method for manufacturing a precast concrete board configured as described above, the foaming agent solution is indirectly sprayed on the surface of the block material 15 via the release film 27, so that after manufacturing the precast concrete board, , it becomes possible to easily remove the foam 33 from the surface of the block material 15.

Furthermore, in the method for manufacturing a precast concrete board configured as described above, the foaming formwork 19 is
Since the foaming agent solution is covered with the lid 31, the foaming agent solution can be foamed reliably and quickly.

Further, in the method for manufacturing a precast concrete plate configured as described above, since the recess 21 is formed on the back surface 17 of the block material 15, it is possible to reliably integrate the concrete 39 and the unit member 35.

In addition, in the embodiment described above, the surface 1 of the block material 15
Although the example in which the foam 33 was formed via the release film 27 in No. 1 was described, the present invention is not limited to such an example, and the foam may be formed directly on the surface of the block material. Of course.

〔Effect of the invention〕

As described above, the method for manufacturing a precast concrete board of the present invention includes the steps of laying out a plurality of blocks having uneven surfaces in a foam formwork with their back sides facing down; A step of directly or indirectly spraying a foaming agent solution onto the surface of the arranged block materials, a step of covering the foaming form with a lid, and a step of leaving the unit member still until the foaming of the foaming agent solution is completed. a step of forming;
It consists of a step of laying the foam of the unit member in a concrete formwork with the foam facing down, and a step of pouring concrete in the upper space of the unit member, curing it, and integrating the concrete and the unit member. This method has the advantage that the back surface of a block material having an uneven surface and an indeterminate thickness can be easily and precisely aligned to the same plane level.

[Brief explanation of drawings]

FIG. 1 is an explanatory diagram showing a state in which block materials are laid out in a foaming form. FIG. 2 is an explanatory diagram showing a state in which a unit member is formed within a foaming mold. FIG. 3 is an explanatory diagram showing a state in which unit members are housed in a concrete formwork and concrete is poured. [Explanation of symbols of main parts] 11... Surface 13... Unevenness 15... Block material 17... Back surface 19... Foaming formwork 31... Lid 33... Foaming body 35 ...Unit member 37...Concrete formwork 39...Concrete. Patent applicant: Takenaka Corporation

Claims (1)

[Claims] (1) The process of laying out multiple blocks with uneven surfaces in a foaming form with their back sides facing down, and directly or indirectly spraying a foaming agent solution onto the surface of the laid blocks. a step of covering the foaming formwork with a lid; a step of forming a unit member by leaving the foaming agent solution until foaming is completed; and a step of forming a unit member with the foam of the unit member facing downward. A method for manufacturing a precast concrete plate, comprising the steps of laying it in a formwork, and pouring concrete in the upper space of the unit member, curing it, and integrating the concrete and the unit member.