JPH0755486B2 - Reinforcement cement mortar molded product and its manufacturing method - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a cement mortar molded article suitable for a building material provided with a reinforcing plate and a method for producing the same.

[Conventional technology]

Such a molded product and its manufacturing method are disclosed in Japanese Patent Publication No. 1-23286. However, such a molded product is likely to undergo plastic deformation due to shrinkage of the material after manufacturing. The moisture in the product changes over time, and the surface without the reinforcing plate is greatly shrunk due to evaporation or the like, and the surface of the reinforcing plate is curved so as to be a convex surface.

Further, the molded product has a high density due to the pressure applied by the upper mold and the lower mold during manufacturing, and it is desirable that the lower surface of the molded product having a high compressive force is used as the surface of the molded product at the time of use.

However, one surface (upper surface) of the molded product that is squeezed by the vacuum suction force is weaker than the other surface due to the lower density and weak against pulling, and the surface becomes rough and durable,
The weather resistance is lowered, and the other surface (lower surface) of the molded product which is not subjected to water squeezing has a disadvantage such as lack of compression reinforcement.

[Problems to be Solved by the Invention]

In view of this, the present invention provides a high density on one surface of a molded product that is subjected to water squeezing without causing plastic deformation to increase the strength by forming a structural prison against tension and to improve the strength of the molded surface on the other side. It is an object of the present invention to provide a reinforced cement mortar molded product having excellent compressive strength and excellent durability and weather resistance, and a method for producing the same.

[Means for Solving the Problems]

In order to achieve such an object, the present invention provides a reinforced mortar molded product that is molded while pressurizing and squeezing a mortar molding material with a mold formed of an upper mold and a lower mold, and at least the lower mold Ventilation / water passage holes are formed on the molding surface, and a plurality of openings for distributing water that can communicate with the ventilation / water passage holes are distributed and perforated reinforcing plates are pressed and bonded to both sides of the cement mortar material. It is intended to provide a reinforced cement mortar molded product.

Further, the present invention provides a method for producing a reinforced mortar molded article which is formed by pressurizing and squeezing water from a mortar molding material by means of a mold formed by an upper mold and a lower mold, and has a ventilation / water passage hole. A plurality of openings are distributed on the molding surface of the lower mold, a perforated reinforcing plate is arranged, then cement mortar molding material is supplied on the reinforcing plate, and then another reinforcing plate is carried on the molding surface. Lower the upper mold and close the upper and lower molds, then pressurize,
Provided is a method for producing a reinforced cement mortar molded article including a step of forced water drawing.

[Action]

In order to carry out the present invention, the principle of the automatic forced water press type press molding machine shown in Japanese Patent Publication No. 54-20209 may be utilized, and not only the productivity can be improved by automation, but also the contraction caused by forced water press. It has been found that a material having a low ratio is sandwiched by a reinforcing plate and has the same strength as a thick iron plate material or a block material, and the weight thereof can be reduced as necessary.

The reinforcing plate is a synthetic resin plate, iron, stainless steel,
Aluminum or other metal nets or metal plates can be used.

The projection of the reinforcing plate having the projection may be a projection piece or a welded pin, but it is preferable to use a projection which is punched at the same time when the projection is formed.

As the perforated reinforcing plate, holes having a constant shape such as a square are provided so as to be distributed over the entire surface, but it is possible to use a reinforcing plate having a projection formed by the above stamping.

〔Example〕

Various features of the present invention will be described in more detail below with reference to the accompanying drawings showing embodiments of the present invention.

1 and 2 show a first embodiment of the molded article according to the present invention. The upper reinforcing plate 2 joined to the upper surface of the plate-shaped mortar molding material 1 is provided with a plurality (100 in the figure) of substantially square openings that can be used for water squeezing. A protrusion 4 extends downward corresponding to the opening 3. The protrusions 4 inevitably bite into the molding material to form a strong reinforcing plate, and the lower reinforcing plate 5 having the same openings and protrusions as the upper reinforcing plate 2 on the lower surface of the molding material 1 is not removable. It bites as much as possible and the protrusion 6 is visible.

According to the present invention, the molded product is not limited to the above-mentioned ones, the shape, number and distribution method of the openings can be variously selected, and the welding pin can be provided on the perforated plate. When using a perforated plate, it is conceivable to omit the protrusions because the cement mortar material is filled in the holes to provide a joining force. The need for protrusions is high for plates without openings.

3 to 6 are schematic cross-sectional views of a molding die used in various examples of the method for producing a molded product according to the present invention.

In FIG. 3, a mold frame 12 that moves up and down with respect to the upper mold 11 is provided around the upper mold 11, and a molding plate (lower surface) of the upper mold 11 carries some reinforcing plates 13 (for example, 4 pieces). ) Magnet pad 14
Is buried. The lower mold 15 has a water squeeze hole 17 communicating with the water squeeze chamber 15 on the molding surface (upper surface) above the water squeeze chamber 16 leading to the water discharge port. The molding surface is provided with a filter plate device including a draining iron plate 19, a wire net 20, and a filter cloth 21, and another reinforcing plate having a plurality of openings on the filter plate device.
22 shows the state in which the cement mortar material 23 is supplied thereon. For other structures and operations of this device, refer to the above-mentioned Japanese Patent Publication No. 1-223286, Japanese Patent Publication No. 54-20209, and the like.

Explaining the steps of manufacturing a reinforced cement mortar molded product using such a device, the upper mold is used to form the molding material 22 in the illustrated state.
11 is lowered together with the mold 12, the lower end of the mold 12 is joined to the upper surface of the filter plate device of the forming surface of the lower mold, and the piston provided with the upper mold 11 is operated to compress the upper mold 11 into the molding material 23. When a force is applied, the moisture contained in the mortar molding material 23 reaches the water squeeze chamber 16 through the water squeeze hole 17 of the lower mold 15 from the filter plate device and reaches the drain pipe.
It passes through 18 and is discharged to the drain.

When molding is completed, the molding material 2
With the 3 sandwiched, the upper mold 11 is lifted upward together with the mold 12 in the same state, and then moved to the position where the receiving plate is horizontally arranged and the mold 12 is lifted with respect to the upper mold 11. And deliver it to the receiving plate. If the mold 12 is not enough to release the mold, the magnet pad 14 is used as an electromagnet to cut off its conductivity during the mold release, or an air supply pipe for supplying the mold release air to the molding surface of the upper mold. You may pierce.

FIG. 4 is different from FIG. 3 in that the mold 12A is not the upper mold 11,
An embodiment provided around the lower die 15 will be shown. In this case, to lift the molded product for transportation, move the upper mold 11,
It may be necessary to bring a conveyance device for vacuum suction, which is different from the upper mold 11, into contact with the upper surface of the molded product. If the magnet pad 14 is an electromagnet and has a force to attract the entire molded product, it can be conveyed to the upper mold 11.

FIG. 5 shows that water is squeezed on both sides. Since both sides of the molded product serve as the reinforcing plates, the smoothness of the molded surface is not taken into consideration, and the water squeezing capacity is increased accordingly, and the time required for molding can be shortened. When vacuum suction is also performed on the lower mold 15, the suction of the lower mold 15 is stopped when the mold frame is lowered at the time of mold release after molding.

The embodiment shown in FIG. 6 is different from the embodiment shown in FIG. 5 only in that the mold 12 is attached to the upper mold 11. Vacuum suction port 18
The portion that connects A and the water squeezing chamber 16A is configured to maintain the communication despite the relative movement of the mold 12 with respect to the upper mold 11.

If the discharge pipe 18 or the vacuum suction port 18A communicating with the drainage port or the vacuum suction blower from the water squeezing chamber 16 or 16A can be switched so as to be connected to the suction pipe, the molding surface, especially the filter plate device is not provided. In this case, it is possible to contribute to the release of the molding surface.

〔effect〕

In the molded product and the manufacturing method thereof of the present invention, since the reinforcing plate is pressed and adhered to both sides of the molded product, deformation of the finished product due to shrinkage of the material occurs due to rigidity, tensile strength and compressive strength of the reinforcing plate. Absent. In addition, since at least the lower mold side reinforcement plate is provided with multiple openings to enable pressure molding with forced water squeeze, the lower surface of the molded product with a high mold compression force is as low as in the past. It does not become fragile due to its density, and it is also strong and tough against tension, and even if some roughening occurs on the surface, it is covered and reinforced by a reinforcing plate. Furthermore, the other surface of the molded product, which is not water-squeezed by the mold, becomes a structural cell without lacking compressive strength, and a low-cost building material can be produced at high speed.

[Brief description of drawings]

FIG. 1 is a plan view of a first embodiment of a molded product of the present invention, FIG. 2 is a sectional view taken along line II-II of FIG. 1, and FIG. 3 is a second embodiment of the manufacturing method of the present invention. FIG. 4 is a schematic sectional view of an apparatus used for the method, FIG. 4 is a view similar to FIG. 3 showing a third embodiment of the manufacturing method of the present invention, and FIG. 5 is a fourth embodiment of the manufacturing method of the present invention. FIG. 6 is a view similar to FIG. 3, and FIG. 6 is a view similar to FIG. 3 showing a fifth embodiment. 1 ... Mortar molding material, 2 ... Upper reinforcing plate, 3 ... Opening, 4
... Protrusions, 5 ... Lower reinforcing plate, 6 ... Protrusions, 11 ... Upper mold, 12,12A
… Formwork, 13… Reinforcement plate, 14… Magnetic pad, 15… Lower mold, 16,1
6A ... water squeeze chamber, 17,17A ... water squeeze hole, 18 ... drainage pipe, 18A ... vacuum suction port, 19,19A ... draining iron plate, 20, 20A ... wire mesh, 21, 21A ... filter cloth, 22 ... another reinforcement Board, 23… Cement mortar material.

Claims (7)

[Claims] 1. A reinforced mortar molded product which is molded by pressing and squeezing a mortar molding material with a mold formed by an upper mold and a lower mold, and at least the molding surface of the lower mold is ventilated. The present invention is characterized in that it has a water passage hole, and a plurality of openings for distributing water that can be communicated with the ventilation / water passage hole are distributed and perforated reinforcing plates are pressed against both sides of the cement mortar material and bonded. Reinforced cement mortar molded product. 2. The reinforced cement mortar molded article according to claim 1, wherein the reinforcing plate is a metal net or a plate made of metal or synthetic resin. 3. The reinforced cement mortar molded product according to claim 1, wherein the reinforcing plate has a plurality of protrusions fitted on a cement mortar material on an inner surface thereof. 4. A method for producing a reinforced mortar molded article, which is formed by pressurizing and squeezing water from a mortar molding material by means of a mold formed by an upper mold and a lower mold, and has a ventilation / water passage hole. A plurality of openings are distributed on the molding surface of the lower mold, a perforated reinforcing plate is arranged, then cement mortar molding material is supplied on the reinforcing plate, and then another reinforcing plate is carried on the molding surface. A method for producing a reinforced cement mortar molded product, which comprises a step of lowering an upper mold to close upper and lower molds, followed by pressurizing and forcibly watering. 5. The reinforcing cement mortar according to claim 4, wherein the reinforcing plate is a metal net or a metal plate, and the upper mold has no water squeezing holes and the reinforcing plate is adsorbed and supported by a magnet. Molded article manufacturing method. 6. The method for manufacturing a reinforced cement mortar molded article according to claim 4, wherein a plurality of protrusions are distributed over substantially the entire surface of the reinforcing plate to be joined to the molding material. 7. The method for producing a reinforced cement mortar molded article according to claim 4, wherein the reinforcing plate is formed by stamping and has projections at the same time.