JP4914631B2 - Manufacturing method of remaining mold - Google Patents

Description

  In the case of constructing a concrete retaining wall, sabo dam, pier, etc., the present invention is a type of formwork that remains as a wallboard on the surface of solidified concrete after pouring concrete into the formwork, especially Relates to a method for manufacturing a residual form which is formed of a raw material of zero slump and is formed into a plate shape with a constant area and has an uneven design on its front side. The “zero slump ready-mixed concrete” referred to in the present invention refers to a material used in an immediate demolding method, and refers to a material in which the slump becomes zero in a concrete slump experiment.

  Conventionally, as a method of manufacturing a residual mold with a flat surface made of zero slump ready-made concrete and finishing the front side, in particular, a concrete residual mold formed with a concave and convex design with a molding die, Insert zero slump ready-mixed concrete into the mold body from above, while applying vibration to the mold body and also to the upper mold, press and compact the ready-mixed concrete with the upper mold, and then open the mold In this manufacturing method, the compacted ready-mixed concrete is pushed up from below and immediately removed from the mold body.

  However, when the remaining mold is molded by the above-described conventional method, as shown in FIGS. 3 (b) and 3 (c), the convex top (51) on the front side of the remaining mold (5) is missing, and the convex surface is air. There is a problem that the surface tends to become rough due to bubbles or the like, and a lot of defective finishes on the front side of the remaining formwork (5) occur, resulting in poor appearance. This is thought to be because when the ready-mixed concrete is pressed and compacted with the upper mold, an air pocket is generated in the recess of the upper mold. For this reason, the present condition is that the residual formwork (5) which finishes a front side is not manufactured in the raw concrete of zero slump. On the other hand, since there is no problem when general fluid concrete is used, the remaining formwork (5) finished on the front side is manufactured. However, the remaining formwork (5) is produced using this fluid concrete. It was difficult to increase the production quantity because it was necessary to wait until the concrete solidified.

In addition, as a residual mold used for the part which cannot be seen on the back side or the foundation part, it is manufactured by using zero-slump ready-mixed concrete. Japanese Patent Application No. 10-376144 “Remaining mold with many holes” The “manufacturing method” has been proposed by the present inventors. This is done by putting zero slump ready-mixed concrete into the mold body from above, compressing (pressing) the ready-mixed concrete with the upper mold while applying vibration to the mold body, and then compacting the mold after opening the mold. This is a manufacturing method in which ready-mixed concrete is pushed up from below and immediately removed from the mold body. In this case, since there are a large number of holes, there is no problem as described above and no finishing is required.
Japanese Patent Application No. 10-376144

  An object of the present invention is to provide a method for manufacturing a residual mold which uses a zero-slump ready-mixed concrete and can efficiently produce a residual mold that finishes the front side and obtain a clean surface.

The present invention has been made to solve the above problems, that is, since a large number of concave portions and convex portions are formed on the upper mold surface of the molding die, a large number of the concave portions and convex portions are formed on the surface. The formed concavo-convex member is provided, and the concavo-convex member is detachably attached to the surface of the upper mold, and the average height of the concavo-convex is used as a reference line, and the surface area of the convex part that hits the lower part is higher than the reference line. A method for producing a residual mold which is larger than the surface area of the concave portion hitting the mold , and further uses the upper mold to press the zero slump ready-mixed concrete put into the lower mold of the molding die with the upper mold while applying vibration to it. It makes with. The "surface area of the convex portion" in the present invention refers to the surface area of the convex portion side (lower side) center height of irregularities (average height 2 indicated by a dashed line) as a reference line, the "surface area of the recess portion" shall refer to the surface area of the concave side (upper side) of the center height of the irregularities in the reference line.

Since the concave portion (1a) and the convex portion (1b) are formed on the surface of the upper die (1) of the molding die (A) as in claim 1, the concave portion (1a) and the convex portion (1b) Are provided on the surface of the upper mold (1) in a detachable manner, and the average height of the irregularities is used as a reference line. The surface area of the convex part (1b) that hits the lower part is made larger than the surface area of the concave part (1a) that hits the upper part of the reference line, and the upper mold (1) is used to lower the mold (A) The zero-slump ready-mixed concrete that was put into) was pressed with the upper mold (1) while applying vibration to it to produce the remaining formwork (5), thereby producing a concrete design with an uneven design on the front side. When manufacturing the remaining mold (5) with the molding die (A), the convexity that tends to become rough due to air bubbles etc. By making the portion (51) as small as possible and making it inconspicuous, by increasing the size of the recessed portion that is beautifully finished, the remaining formwork (5) whose front side is beautifully finished can be manufactured efficiently. In addition, since the concavo-convex member (11) is detachably attached to the surface of the upper mold (1), the concavo-convex member (11) can be replaced in accordance with the front side finish of the remaining mold (5). Therefore, it becomes possible to manufacture the remaining molds (5) of various designs. Further, when the concave portion (1a) or the convex portion (1b) is worn, it can be easily repaired or replaced.

FIG. 1 and FIG. 2 are diagrams showing a main part of an embodiment of the present invention, which will be described. (A) is a molding die for manufacturing the concrete residual formwork (5) as shown in FIG. 3 (a) in which an uneven design is formed on the front side. (1) is an upper mold, and the surface of the upper mold (1) has a large number of concave portions (1a) and convex portions (1b). The surface area of the convex portions (1b) is one point as shown in FIG. It is formed larger than the surface area of the recess (1a) corresponding to the upper part of the chain line . The concave portion (1a) is for forming a convex portion of the remaining mold (5), and the convex portion (1b) is for forming a concave portion of the residual mold (5). The concave portion (1a) and the convex portion (1b) may be provided directly on the surface of the upper mold (1). It is preferable that the uneven member (11) is detachably attached to the surface of the upper mold (1) (see FIG. 1). Further, the concavo-convex member (11) is a cast made of stainless steel, and is attached to the surface of the upper die (1) with bolts. Further, it is preferable that a chamfered taper surface (1c) is provided around the upper mold (1) and inside as shown in FIG. Moreover, it is good also as what formed many slot holes as shown to Fig.3 (a) in the back side of the said residual formwork (5).

  (2) is a lower mold into which zero slump ready-mixed concrete is introduced. (3) is a metal bottom plate arranged on the bottom inside the lower mold (2). The bottom plate (3) supports the compacted ready-mixed concrete and is movable up and down. (4) is a knockout pin for pushing up the bottom plate (3) from below to remove the mold. (5) is a residual mold made of concrete formed by the molding die (A), and is finished with a design having a large number of irregularities on the front side of the residual mold (5). The unevenness of the remaining mold (5), particularly the surface area of the convex top (5a) is formed small.

Next, the method of the present invention will be described. First, since a large number of concave portions (1a) and convex portions (1b) are formed on the surface of the upper mold (1) of the molding die (A), the concave portions (1a) and convex portions (1b) are formed on the surface. A large number of concavo-convex members (11) are provided, and the concavo-convex member (11) is detachably attached to the surface of the upper mold (1), and the average height of the concavo-convex is used as a reference line and hits the lower part thereof. Prepare a convex part (1b) with a surface area larger than the surface area of the concave part (1a) which hits the upper part of the reference line . At this time, an uneven member (11) having a large number of concave portions (1a) and convex portions (1b) formed on the surface may be detachably attached to the surface of the upper mold (1). The part (1b) may be provided directly on the surface of the upper mold (1). After the upper mold (1) is set to the state shown in FIG. 1, a predetermined amount of zero slump ready-mixed concrete is put into the lower mold (2) of the molding mold (A), and the upper mold (1) is lowered. The green concrete is compacted while being pressed and vibration is applied to the green concrete. After the ready-mixed concrete is molded, the mold is opened and the bottom plate (3) is pushed up from below by the knockout pin (4), so that the remaining formwork (5) which is the ready-made concrete is removed. is there. At this time, the demolded residual formwork (5) has a rough top surface (51) as shown in FIG. 3 (a), but compared with the conventional remaining formwork (5). Since the surface area of the convex top part (51) is considerably smaller than that of the concave part, the surface finish of the remaining formwork (5) is beautiful because the surface area of the good concave part increases. It will be a good looking product.

It is explanatory drawing which shows embodiment of the method of this invention. It is explanatory drawing which shows the principal part of the upper-type uneven | corrugated member used by this embodiment. It is explanatory drawing which compares the surface of the residual mold form manufactured by the method of this invention and the conventional method.

A Mold 1 Upper mold
11 Concavity and convexity
1a Recess
1b Convex part
1c Tapered surface 2 Lower mold 5 Remaining formwork

Claims (1)

In the manufacturing method of the remaining mold which manufactures the residual mold (5) made of concrete having an uneven design on the front side with the molding mold (A), the upper mold (1) of the molding mold (A) ) In order to form a large number of concave portions (1a) and convex portions (1b) on the surface, an uneven member (11) having a large number of concave portions (1a) and convex portions (1b) formed on the surface is provided, and The concavo-convex member (11) is detachably attached to the surface of the upper mold (1), and the average height of the concavo-convex is used as a reference line to determine the surface area of the convex portion (1b) that falls below the reference surface. Zero slump ready-mixed concrete that is larger than the surface area of the recess (1a) that hits the upper part of the line, and that is used in the lower mold (2) of the molding die (A) using the upper mold (1), A method for producing a remaining mold, wherein the upper mold (1) is pressurized while applying vibrations thereto.