JPH02263608A - Placing device - Google Patents

Abstract

PURPOSE:To control an inflow of air into a space between layers of a mixture, by a method wherein after feed of a mixture comprising cement mortar containing a reinforcement fiber within a vessel of a placing device, the mixture is separated by a board member, made flat by passing through each opening parts of open ends of a housing end a laminated body is formed by abutting against each other. CONSTITUTION:A housing 24 is constituted of a tapered cylinder where cross-sectional form is of a rectangle and an area of a cross section is reduced gradually toward the tip 22 from a base end 30 connecting with an end of a vessel part 12. An open end of the housing 24 is divided into a plurality of opening parts 32 with sharp ends 26b of board members 26 each. An interval between mutual ends 26a of the board members is set up at length dimensions or shorter of a reinforcement fiber F and the opening parts 32 each are made into a rectangular plane form. A mixture M thrusted forward within the housing 24 from the vessel part 12 is separated into a plurality of parts by the board member 26, the mixtures passed through the opening parts 32 each are made into a boardlike state, which are contacted each other directly after passing of the opening part and made into a continuous laminated body M1.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a casting device for a mixture of cement mortar or cement paste containing reinforcing fibers.

(Prior Art) A molded product made by molding a mixture of cement mortar or cement paste and a large number of reinforcing fibers (chopped fibers) into a plate shape is used as a wall material suitable for partition walls of buildings, etc. ing.

JP-A-60-72705 or JP-A-62-
As disclosed in Japanese Patent Publication No. 236705, in order to obtain a plate-shaped molded product (molded plate) having a fiber-like mechanical strength, the mixture has a size smaller than the length of the reinforcing fibers,
Alternatively, the reinforcing fibers are cast through the openings of a casting device having a discharge section with an opening having a size not more than twice the length of the reinforcing fibers. The reinforcing fibers in the mixture are turned over as they pass through the aperture, thereby orienting the reinforcing fibers so that they lie on one of a plurality of mutually parallel planes. Also, the mixture flattened through the openings is stacked on top of each other in a mold to obtain the form of a molded plate with a predetermined thickness dimension.

(Problems to be Solved by the Invention) By the way, when the mixture is stacked, air remains between the layers of the mixture. The residual air creates cavities between the layers of the mixture and reduces the mutual adhesion area of the layers, which impairs the integrity of the molded plate made of multiple layers, leading to a decrease in the mechanical strength, durability, etc. of the molded plate.

In order to solve this problem, it is conceivable to apply vibration to the mixture after pouring, thereby eliminating the residual air between the layers. However, in the case of a so-called soft mixture in which the water-cement ratio is relatively high, there is a problem that the residual air rising in the mixture due to the vibration disturbs the orientation of the reinforcing fibers. On the other hand, in the case of a so-called hard-kneaded mixture in which the water-cement ratio is relatively small, the effect of removing residual air by applying vibration is very small.

An object of the present invention is to provide a casting device that can suppress air from flowing between the layers of the mixture in order to eliminate air remaining between the layers of the mixture.

(Means for Solving Problems, Actions and Effects of the Invention) The present invention provides a casting device for a mixture of cement mortar or cement paste containing reinforcing fibers, which comprises a container portion for receiving the mixture; a discharge part communicating with the container part and allowing the mixture to be discharged out of the container part, the discharge part having a housing having an open end; and the discharge part being disposed inside the housing, and the discharge part having an open end. one or more plate members each having one sharp end that divides the surrounding space into a plurality of space portions each having a dimension equal to or less than the length dimension of the fiber, the one sharp end having a thickness gradually decreasing toward the open end; Consists of.

According to the invention, the mixture is fed into the container section of the membrane device and then poured from the discharge section into the mold under the action of gravity or under the application of a suitable thrust. The mixture filling the housing, which is part of the discharge part, is separated by the plate member and then flattened through each opening in the open end of the housing, immediately after which they abut against each other to form a stack. Since one end of the plate member is sharp, there is a gap between the mixtures (a head difference due to the thickness of the plate member) between the mixtures separated by the plate member after passing through the opening and coming into contact with each other. Therefore, it is possible to prevent air from entering through the gap and from remaining air associated with this. Since each opening has a dimension that is less than or equal to the length dimension of the reinforcing fibers, when the mixture passes through the opening, the reinforcing fibers in the mixture that are in an upright state are laid down, and each reinforcement The fibers will be placed on planes parallel to each other.

The number of layers of the laminate formed using the pouring device of the present invention, and hence the thickness of the laminate, can be arbitrarily changed by changing the size of the open end of the housing and the number of the plate members. can do. Therefore, it is possible to form a molded plate having a desired thickness with a -degree pouring operation, and a molded plate with a large thickness can be obtained by performing a plurality of pouring operations of stacking the laminates. Even in some cases, stacking can significantly reduce the total amount of air remaining in the molded plate compared to stacking the mixture layer by layer. Furthermore, since a plurality of layers of the mixture can be formed in a single casting operation, the time required to manufacture the molded plate can be shortened.

The mixture discharge section may further include a cylindrical body that is continuous with the open end of the housing and has a cross section having the same shape as the open end. According to this, since the cylindrical body surrounds the front of one end of the plate member with respect to the moving direction of the mixture, air flows from the sides between the formed flat bodies through the space. Intrusion can be prevented.

The cylindrical body may also be tapered.

According to this, the layered product can be compacted while passing through the cylindrical body, and the contact between the layers in the layered product can be further improved.

It is desirable that each plate member has approximately the same length from one end to the other end. According to this, the FJ friction between each plate member and the mixture separated by each plate member can be made almost the same, thereby easily adjusting the release rate of the mixture from each opening portion. be able to.

A part of the inner surface of the housing facing the plate member,
A plurality of protrusions may be provided extending from the container portion toward the open end. According to this, grooves corresponding to the protrusions can be formed in the uppermost layer or the lowermost layer of the laminate. These grooves provide a strong bond between the drawing boards when the concrete plate is formed on the forming plate to form a composite board consisting of a forming plate having the grooves and a concrete plate overlaid thereon, for example. It helps in giving relationships.

In the case of an example in which the discharge section has the cylindrical body, it is desirable that the protruding strip is provided so as to extend to the tip of the cylindrical body.

The interior of the container section can be partitioned into a plurality of chambers, and each chamber can be communicated independently with one or more of the openings. According to this, a laminate and a molded plate having different strengths in the thickness direction can be obtained by charging the mixtures having different reinforcing fiber contents into each chamber and passing them through the openings.

(Example) Referring to FIG. 1, a pouring device 10 according to the present invention comprises a cement mortar or a cement paste mixture (a second cement paste) containing a large number of reinforcing fibers (indicated by the symbol F in FIG. 2). (indicated by reference numeral M in the figure), and a discharge section 14 that allows the mixture to be discharged to the outside of the container section 12.

The reinforcing fibers are chopped fibers suitably selected from glass fibers, carbon fibers, aramid fibers, etc. and having a short length, for example 10 mm.

Container part shown! 2 consists of a cylindrical body having a rectangular cross-sectional shape, and a discharge part 14 is connected to one open end of the cylindrical body, and
The container portion 12 has an inlet 16 for the mixture that opens at the top surface near the other end of the cylinder. The mixture introduced into the container part 12 through the inlet 16 is transferred to the container part 1 for pouring under the action of gravity or by means of suitable propulsion means.
2 toward the discharge section 14.

An example of the propulsion means is shown in FIG. This propulsion means 18
consists of a piston 18a that is slidably fitted into the cylindrical body constituting the container portion 12, and a rod 18b that is fixed to the piston and extends rearward with respect to the direction of movement of the mixture. The piston 18a is movable from the rear of the input port 16 to one end (front end) of the cylinder.

': iJ2 In Figure 2, the propulsion means 18 is actuated, whereby the mixture M is transferred to the formwork 20 for forming a plate having a rectangular planar shape.
This shows the state of pouring. Instead of the illustrated example, the propulsion means may be, for example, a screw conveyor in which the other end of the container portion 12 is a cylinder having a circular cross section and is disposed within the cylinder. In this example, the input port 16 is located above the conveyor.

The discharge section 14 includes a housing 24 having an open end (tip) 22, one or more (in the illustrated example, a plurality of) plate members 26 disposed inside the housing 24, and a tapered cylindrical member connected to the open end 22. It consists of a body 28. The discharge portion 14 may not include the cylindrical body 28 instead of the illustrated example.

The housing 24 has a rectangular cross-sectional shape and is similar to the container portion 12.
It consists of a tapered cylindrical body whose cross-sectional area gradually decreases from the proximal end 30 connected to one end to the distal end 22.

Each plate member 26 has a rectangular planar shape. Further, each plate member 26 has one end 26a and the other end 26b which terminate in the vertical surface including the open end 22 and the vertical surface including the base end 30 of the housing 24, and both side portions fixed to the inner surfaces of both side walls of the housing 24. and has. One end 26a of each plate member 26 thus has a plurality of opening portions 32 (FIG. 3) that define an opening in the elevational plane defined by the open end 22 of the housing 24.
partition into. The mutual spacing of each plate member 26 is equal at each of the open end 22 and proximal end 30 of the housing;
The mutual spacing between the plate members 26 at the open end 22 of the housing, that is, the mutual spacing between the one ends 26a of the plate members is set to be equal to or less than the length dimension of the reinforcing fibers F. Therefore, each opening portion 32 has a rectangular planar shape.

Mixture M propelled from container section 12 into housing 24
is separated into a plurality of parts by the plate member 26, and then discharged to the outside through each opening part 32 and the cylindrical body 28. The mixture guided by each plate member 26 and passed through each opening 32 takes on a plate shape, and comes into contact with each other immediately after passing through the opening, forming a continuous laminate M. The laminate M1 continues to pass through the cylindrical body 28, thereby being consolidated in its thickness direction, and the layers constituting the laminate M are brought into closer contact with each other. The cylindrical body 28 also prevents air from entering between the layers from the side after the mixture is separated by the plate member until they come into contact with each other. Thereby, a laminate M1 having no residual air between the layers is obtained. Cylindrical body 2
8 is preferably tapered as in the illustrated example, but
It is also possible to prevent air from flowing between the layers by using a housing having the same cross section as the opening defined by the open end 22 of the housing.

In the case where the discharge part 14 does not have a cylindrical body 28, in order to prevent air from entering between the layers of the mixture from the side, as shown in FIG. A plate member 26 having one sharp end 26a whose thickness gradually decreases toward the end is used. One sharp end 26a guides the two layers of the mixture away from both sides (top and bottom in the figure) so that there is no gap between them. As a result, air is prevented from entering between the layers.

Needless to say, for the discharge section 14 having the cylindrical body 28, a plate member having the sharp one end 26a can be used. Moreover, regardless of the presence or absence of the cylindrical body 28, each plate member has a rounded other end, for example, an other end 26 having a semi-cylindrical surface.
It is desirable to have b (see Fig. 3).

By making the other end 26b rounded, it is possible to reduce the reinforcing fibers from getting caught, bunched up, broken, etc. on the other end.

More preferably, as shown in FIG.
Set the length dimensions of . In this example, the other end 26b of each plate member extending beyond the other end 30 of the housing and into the container portion 12 is parallel to the longitudinal axis of the container portion 12. By making the length dimensions of each plate member 26 substantially the same, the magnitude of the frictional force between each plate member 26 and the mixture moving toward the open end 22 of the housing in contact therewith is made substantially uniform. be able to. This ensures that the rate of release of the mixture from the apertures 32 is approximately the same and avoids stretching of the layers due to differences in the speed of movement of each layer as the stack is formed.

In the above description, the open end 22 of the housing and the tip 26a of the plate member are on a plane. In contrast, in the example shown in FIG. 5, the open end 22 of the housing 24 and the tips 26g of each plate member are on a curved surface that curves convexly toward the container portion 12.

However, this example is applicable only to the discharge section 14 that does not have the cylindrical body 28, and as described above, each plate member 26 has a sharp tip 26a. In the illustrated example, the open end 22 is also sharp like the tip 26a of the plate member, but it may instead be non-sharp.

Next, in the example shown in FIGS. 6 and 7, the housing 2
4 (in the illustrated example, the inner surface of the top plate portion 24a) and a portion of the inner surface of the cylindrical body 28 (in the illustrated example, the inner surface of the top plate portion 28a that is continuous with the top plate portion 24a). Additionally, a plurality of protrusions 34 extending from the container portion 12 toward the tip of the cylindrical body 28 are provided at intervals. These protrusions 34 are located on the uppermost plate member 2 as seen in Fig. 6.7.
The mixture moving along 6 and the uppermost layer moving within the tube 28 are grooved. As a result, the laminate has a plurality of grooves on its front or back surface. The cross-sectional shape of the protrusion 34 may be a semicircle, for example, in addition to a rectangle as shown in the example shown in FIG.

The molded plate obtained by curing the laminate can be used to form a composite plate by laminating another plate made of a different material, such as a concrete plate having the same planar shape. The groove serves to firmly connect the drawing boards when forming the concrete board by pouring concrete onto the forming board to form the composite board.

Note that in the case of an example without the cylindrical body 28, the protruding stripes are provided only on a part of the inner surface of the housing 24.

Referring to FIG. 8, in this example, the interior of the container portion 12 is partitioned into a plurality of chambers 12A, 12B, and 12C, each of which communicates independently with a plurality of openings. Two partition plates 36 that partition the three chambers extend parallel to each other in the longitudinal direction of the container part 12, one end of each is connected to one of the plurality of plate members 26, and the other end connects the rear end of the container part. stipulated. In the illustrated example, the upper and lower chambers 12A and 12C communicate with the three upper and lower openings 32, and the central chamber 12B communicates with the four central openings 32. Further, a propelling means 18 similar to that shown in FIG. 1 is arranged behind each chamber, more specifically, behind the input port 16 connected to each chamber. The number of chambers can be set arbitrarily, and the number of openings communicating with the chambers can be set to one or more arbitrary numbers.

When using this example of pouring equipment, for example, the upper and lower chambers 1
If a mixture with a high mixing rate of reinforcing fibers is supplied to chambers 2A and 12C, and a mixture with a low mixing rate of reinforcing fibers is supplied to the central chamber 12B, a molded plate with higher strength near the front and back surfaces than the internal strength can be obtained. Obtainable. Such a molded plate is suitable for installation in a place where alternating positive and negative loads are applied to the front and back surfaces. For example, if the molded plate is installed in a place where it receives a continuous load from one side in the same direction, three types of mixtures with different reinforcing fiber mixing ratios may be used. Chambers 12A, 12B, 12 in descending order of
Supply to C. The molded plate thus obtained has three regions whose strength gradually increases or decreases from its front surface to its back surface.

Note that the dimension between both side walls of the housing 24, that is, the open end 2
The width dimension of 2 can be set arbitrarily.

[Brief explanation of drawings]

FIG. 1 is a vertical cross-sectional view schematically showing the pouring device of the present invention, FIG. 2 is a partially cutaway perspective view showing a discharge part and a part of the container part of the pouring device, and FIG. 4, 5 and 6 are schematic longitudinal sectional views of other examples of the ejecting portion, and FIG. 7 is taken along line 7--7 of FIG. 6. FIG. 8 is a schematic longitudinal sectional view of another example of a pouring device. 10: pouring device, 12: container section, 12A, 12B, 12C: chamber, 14: discharge section, 22: open end of housing, 24:
Housing, 26: Plate member, 26a, 26b: One end and other end of the plate member, 28: Cylindrical body, 32: Opening portion, 34: Convex strip.

Claims (7)

[Claims] (1) A casting device for a mixture consisting of cement mortar or cement paste containing reinforcing fibers, comprising a container portion for receiving the mixture, and a container portion communicating with the container portion for discharging the mixture to the outside of the container portion. a housing having an open end; and a plurality of discharge portions disposed within the housing having an opening defined by the open end of the housing having a dimension less than or equal to the length dimension of the fiber. one or more plate members each having one or more sharp ends defining an opening of the housing and having a thickness that gradually decreases toward the open end of the housing. (2) A casting device for a mixture consisting of cement mortar or cement paste containing reinforcing fibers, comprising a container part that receives the mixture and a discharge part that allows the mixture to be discharged out of the container part. , the discharge section includes a housing having an open end, and one end disposed inside the housing and partitioning an opening defined by the open end of the housing into a plurality of opening portions each having a dimension equal to or less than the length dimension of the fiber. and a cylindrical body connected to the open end of the housing and having a cross section having the same shape as the opening. (3) A casting device for a mixture of cement mortar or cement paste containing reinforcing fibers, comprising a container portion for receiving the mixture and a discharge portion for allowing the mixture to be discharged out of the container portion. , the discharge section includes a housing having an open end, and one end disposed inside the housing and partitioning an opening defined by the open end of the housing into a plurality of opening portions each having a dimension equal to or less than the length dimension of the fiber. and a tapered cylindrical body connected to an open end of the housing. (4) Claim (1), (2) or (3), wherein each plate member has approximately the same length from one end to the other end.
The pouring device described in . (5) The driving device according to claim (1), wherein a plurality of protrusions extending from the container portion toward the open end are provided on a part of the inner surface of the housing facing the plate member. . (6) A plurality of protrusions extending from the container portion toward the tip of the cylindrical body are provided on a portion of the inner surface of the housing facing the plate member and on a portion of the inner surface of the cylindrical body. The pouring device according to claim (2) or (3). (7) The pouring according to claim (1), (2) or (3), wherein the interior of the container section is partitioned into a plurality of chambers, each chamber communicating independently with one or more of the openings. Device.