JP4658992B2 - Method of forming self-hardening material with concrete - Google Patents

Description

The present invention relates to a method for molding a self-hardening material with concrete.

  There are various types of molds for molding concrete or concrete products, which are composed of combinations of fixed molds and movable molds, as shown in the following patent documents.

Japanese Utility Model Publication No. 53-46355 Japanese Utility Model Publication No. 5-26309 JP 2001-287214 A JP-A-9-290414

  In these, the inner frame is a fixed mold frame, the side frame is a movable mold frame, and the lower side of the side frame is pivotally attached so that it can be opened and closed.

  In addition, as a molding method that can suppress the amount of air that the concrete entrains when molding concrete, there is a method in which a mold for molding an inorganic concrete molded body such as a pipe is vertically arranged and centrifugally molded (for example, the following patents) References 5 and 6).

  Further, as the molding method, there is a method of obtaining a concrete molded body by forcibly injecting concrete from the lower position of the mold and forcibly moving it upward (see, for example, Patent Documents 7, 8, and 9).

  Furthermore, as the forming method, a method has been proposed in which the injection conduit is lowered from the upper part of the standing mold to the lower part, and the injection conduit is raised while filling with concrete (for example, see Patent Document 10).

Japanese Patent Laid-Open No. 6-193976 (page 3, FIG. 1) JP-A-8-39534 (3rd page, FIG. 2) JP-A-5-520411 (2nd page, FIG. 2) Japanese Patent Laid-Open No. 5-293815 (page 3, FIG. 1) JP-A-5-293817 (page 3, FIG. 1) Japanese Patent Laying-Open No. 2005-200849 (5th page, FIG. 4-6)

  All the molds formed by combining the fixed molds and the movable molds shown in Patent Documents 1 to 4 are movable molds in consideration of the ease of demolding, and the inside of the molds when placing concrete Space is fixed.

  In the techniques of Patent Documents 5 to 10, the effect of suppressing air mixing can be expected to some extent, but since external force acts directly on the poured concrete, there is a limit to the prevention of air mixing, and the molded product. A so-called “blister” of residual air bubbles remains on the surface of the glass, and there is a problem in quality.

  Furthermore, in the prior art in which concrete is forcibly inserted into the formwork from the lower side of the formwork, the concrete supplied into the formwork from the side of the formwork is divided into two parts in the formwork. After the concrete moves from one side of the formwork along the inner periphery of the formwork, it merges in the other side of the formwork. Immediately below, the continuity of the concrete is lost, and there is a problem that it becomes a strength weakness after hardening.

  A concrete pumping device such as a pump for inserting concrete into the formwork is also required.

  On the other hand, a high toughness cement-based fiber reinforced cement composite material blended with PVA fibers (Polyvinyl Alcohol-based fibers, commonly called vinylon fibers) shown in Japanese Patent Application Laid-Open No. 2000-7395 is a self-filling type (casting). As with mortar, it can be filled by pouring into a mold, but because it has high viscosity and high fluidity, it often does not wrap around a flat, narrow space to make a thin molded product. .

  Furthermore, when a high toughness cement-based fiber reinforced cement composite material is rapidly injected into a mold or a centrifugal force is applied, an uneven fiber is generated, resulting in a reduction in quality.

  In the method of obtaining a molding by forcibly injecting concrete from the lower position of the formwork and forcibly moving it upward, the fibers of the concrete material are positioned in the concrete by the action of gravity during the movement. Control is performed and the possibility of stable dispersion in the molded product can be expected. However, since the injection pressure must be kept high as the concrete is injected, the rigidity of the mold must be increased. Because it is necessary to inject concrete continuously, there are problems such as difficult management. Further, there is a problem that an expensive pump that enables continuous injection at a high pressure is required.

  On the other hand, if continuous injection is not possible, it will be a factor in reducing the quality of the molded product, and increasing the rigidity of the formwork will require an expensive formwork and will be economically inferior. If high-pressure injection is performed without any problem, there is a problem that the quality of the molded product is deteriorated due to deformation of the mold.

The object of the present invention is to eliminate the inconveniences of the conventional examples, and to form a self-hardening material with concrete having high viscosity and high fluidity, has a high effect of preventing air mixing, and reliably moves the self-hardening material to the forming space. Thus, an object of the present invention is to provide a method for molding a self-hardening substance with concrete capable of uniformly dispersing the material and improving molding accuracy.

In order to achieve the above object, according to the present invention, firstly, there is provided a side wall plate on both the left and right sides, and a depth space surrounded by the side wall plate so as to accommodate a self-hardening material made of concrete having high viscosity and high fluidity to be filled. The lower end of the fixed mold frame is pivotally attached to the fixed mold frame, the depth of the fixed mold frame is entered so as to sandwich the self-hardening material, and the fixed mold frame is finally moved to the fixed mold frame side. uses molding form of self-hardening material by concrete consisting of a movable mold to obtain a molding space that requires opening the movable mold with respect to the fixed mold, also movable formwork fixed formwork in a state that has entered the depth space surrounded by side walls, filling the self-hardening material by concrete in a fixed mold, by moving the movable mold to the stationary mold side, as a result, self-hardening substance filled Exhibition Can be moved to the final movable position. It is an summarized in that to produce a molded body having the same shape as the molding space formed by the mold and the fixed mold.

  Second, the movable mold is provided on both sides of the fixed mold, and third, at least one of the movable mold and the fixed mold facing each other has a curved shape.

According to the first aspect of the present invention, a self-hardening material made of concrete having high viscosity and high fluidity is introduced into a space formed by the fixed mold frame and the movable mold frame, and the movable mold frame is placed on the fixed mold frame side. Move to shape. At this time, the self-hardening substance moves in the space formed by the fixed mold frame and the movable mold frame, and finally the same as the space formed by the movable mold frame and the fixed mold frame moved to the final movable position. Shaped shaped bodies can be produced. Moreover, by controlling the moving speed of the movable mold, the self-hardening substance can be moved slowly at a low speed, and uniform dispersibility of the material, that is, uniform orientation can be ensured.

  In addition, it is highly effective in preventing air contamination caused by rapid movement of material, etc., can prevent the generation of cavities due to vacuum locations and air entrainment, and moves the self-hardening material surface in a uniform level. As a result, the generation of the interface can be prevented, and the strength problem due to the discontinuity of the material immediately below the cavity and the interface can be solved.

  In addition, high-quality moldings can be made inexpensively and easily without the need for expensive production equipment such as a pump for continuously injecting self-hardening substances at high pressure and high-rigid formwork and accurate continuous injection management. Can be molded.

In addition, to move the self-hardening material in the space formed by the fixed mold and the movable mold, the movable mold is attached to the fixed mold and the lower end is pivotally attached. By sandwiching the self-hardening material by, it can be moved reliably.

  According to the second aspect of the present invention, by providing the movable mold on both sides of the fixed mold, the number of molded products obtained at a time can be increased.

  According to the third aspect of the present invention, it is possible to produce a molded product having a curved surface.

As described above, the method for molding a self-hardening material with concrete according to the present invention has a high anti-air mixing effect to form a self-hardening material with concrete having high viscosity and high fluidity, and ensures the self-hardening material. By moving to the molding space, the material can be uniformly dispersed and the molding accuracy can be increased.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a side view showing one embodiment of a mold for molding used in the method for molding a self-hardening material with concrete according to the present invention, FIG. 2 is a side view of the main part of the same, and FIG. 3 is a perspective view of the same. The mold is composed of a combination of a vertically fixed type fixed mold 1 and a movable mold 2. Reference numeral 3 in the figure denotes a base on which the pedestal 4 is installed. These are all made of steel.

Fixed frame 1 is provided with a side wall plate 5 on the left and right sides, it has a depth space 7 enclosed by side walls 5 to accommodate the self-hardening substance 6 by concrete having a high viscosity and high fluidity for filling.

  On the other hand, the movable mold 2 has a lower end pivotally attached to the lower end of the fixed mold 1 with a shaft 8, enters the depth space 7 of the fixed mold 1, and is centered on the shaft 8. After moving to the fixed mold 1 side, finally, as shown in FIG. The fixed mold 1 and the movable mold 2 are vertically arranged upright.

  In this embodiment, both the fixed mold 1 and the movable mold 2 have curved surfaces as the molding surfaces, the molding space 9 is flat and curved, and the molded product obtained is a thin curved plate.

  The pedestal 4 is for axially attaching the movable mold frame 2 to the upper side of the pedestal 4, and a guide roller 10 is attached to an extended portion of the movable mold frame 2 below the axially attached part. The movable mold 2 can be easily rotated by sliding on the portion 4a.

  In the figure, reference numeral 11 denotes a tilt stopper of the movable mold 2 provided on the pedestal 4. The lower end corner of the extending part of the movable mold 2 abuts to prevent further tilting.

  Further, the shaft 8 can be inserted / removed as a pin, and the movable mold 2 is detached by pulling out the shaft 8 during demolding or cleaning.

  The movable mold 2 is provided on both sides of the fixed mold 1, and a plurality of molded plates can be obtained simultaneously by arranging a plurality of them in parallel as shown in FIG. In FIG. 3, illustration of the side wall plate 5 is omitted, but it is provided at the left and right ends.

  Further, the fixed mold 1 can be provided with a thickness adjusting material (ancho) 1a at the center thereof.

  As a mechanism for rotating the movable mold 2, it is conceivable to use a hydraulic jack arm. However, in the illustrated example, the wire 12 is used, which is wound up and unwound. In the figure, 13 is a wire block which is a winder of the wire 12, and 14 is a guide roller.

Next, a method for forming a self-hardening material using the concrete of the present invention using the above-mentioned formwork will be described. The self-hardening substance may be of any kind as long as it is concrete or mortar having high viscosity and high fluidity. A crack dispersion type short fiber reinforced cement composite material having the above-described conditions, and PVA short fibers satisfying a predetermined condition are added to a predetermined blending matrix in a range of 1 to 3 Vol. % High-toughness fiber-reinforced cement composite material (high-toughness FRC material) blended three-dimensionally randomly or two-dimensionally at a blending amount of%.

As shown in FIG. 1, the movable mold 2 is opened with respect to the fixed mold 1, and the fixed mold 1 is filled with a self-hardening material 6 made of concrete. Since the movable mold 2 enters the depth space surrounded by the side wall plate 5 of the fixed mold 1, the self-hardening material 6 does not leak.

  From this state, the wire block 13 winds the wire 12 and moves the movable mold 2 to the fixed mold 1 side.

  As a result, the filled self-hardening substance 6 is expanded, and finally, a molded body having the same shape as the space formed by the movable mold 2 and the fixed mold 1 moved to the final movable position can be manufactured. In that case, the self-hardening substance 6 can be extended to the final shape without applying an excessive force. FIG. 4 shows the principle of the present invention.

It is a side view which shows one Embodiment of the mold for shaping | molding used with the shaping | molding method of the self-hardening substance by the concrete of this invention. It is a side view of the principal part which shows one Embodiment of the mold for shaping | molding used with the shaping | molding method of the self-hardening substance by the concrete of this invention. It is a perspective view which shows one Embodiment of the mold for shaping | molding used with the shaping | molding method of the self-hardening substance by the concrete of this invention. It is explanatory drawing which shows the principle of the molding method of the self-hardening substance by the concrete of this invention.

DESCRIPTION OF SYMBOLS 1 ... Fixed formwork 1a ... Thickness adjustment material (Anko)
DESCRIPTION OF SYMBOLS 2 ... Movable formwork 3 ... Base 4 ... Base 4a ... Bottom part 5 ... Side wall board 6 ... Self-hardening substance 7 ... Depth space 8 ... Shaft 9 ... Molding space 10 ... Guide roller 11 ... Tilt stopper 12 ... Wire 13 ... Wire Block 14 ... Guide roller

Claims (3)

The lower end of the fixed mold frame is provided with side wall plates on both the left and right sides, and the fixed mold frame has a depth space surrounded by the side wall plates so as to accommodate the self-hardening material by the concrete having high viscosity and high fluidity to be filled. And a movable mold frame that enters the depth space of the fixed mold frame so as to sandwich the self-hardening substance, and moves to the fixed mold frame side to finally obtain a required molding space. using the molding form of self-hardening material by the concrete,
The movable mold is opened with respect to the fixed mold, and the movable mold enters the depth space surrounded by the side wall plate of the fixed mold, and the fixed mold is filled with a self-hardening material by concrete,
Move the movable mold to the fixed mold,
As a result, the filled self-hardening substance is expanded,
A method for molding a self-hardening material with concrete, characterized in that, finally, a molded body having the same shape as a molding space composed of a movable mold frame and a fixed mold frame moved to a final movable position is manufactured. The method for molding a self-hardening material with concrete according to claim 1, wherein the movable mold is provided on both sides of the fixed mold. The method for molding a self-hardening material with concrete according to claim 1 or 2, wherein at least one of the movable mold frame and the fixed mold frame facing each other has a curved shape.

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