JPH0516118A - Manufacture of hydraulic inorganic molded body - Google Patents

Abstract

PURPOSE:To provide the reinforcing effect in which a sheet-shaped reinforcing material is embedded evenly on one side surface section and forms the reinforcing effect being sufficient theoretically from the viewpoint of fiber reinforcing by installing a pressing means on a carrier means of an extrusion molding machine and feeding the reinforcing material between the extrusion molded body and the carrier means. CONSTITUTION:An inorganic molded body (molded body) 2 is extrusion molded, and then the molded body 2 is placed on a conveyor 3 working as a carrier means and taken off. In other words, a sheet-shaped reinforcing material (reinforcing material) 4 is fed continuously on the conveyor 3 right before the molded body 2 is placed on the conveyor 3, and the molded body 2 is placed onto the conveyor 3 through the reinforcing material 4. Then, the molded body 2 and the reinforcing material 4 are pressed from above and below between a roller 6 and the conveyor 3 working as a pressing means. At least a part of the reinforcing material 4 is embedded on the surface of the molded body 2 in the uncured state, and high bonding force with the molded body 2 can be provided.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a manufacturing method for obtaining a hydraulic inorganic molding having a sheet-like reinforcing material embedded in the vicinity of one side surface.

[0002]

2. Description of the Related Art In recent years, an extrusion-molded product obtained by extrusion-molding an extrusion-molding material containing a cement-based hydraulic inorganic material as a main component into building materials such as flooring materials, exterior wall materials, and roofing materials is often used. Has reached. Such an extrusion-molded cured product has hitherto been
A molding material obtained by mixing a mixture of cement-based hydraulic inorganic substance, aggregate, reinforcing fiber, thickener, etc. with water is pressed in the extruder while vacuum degassing and pressurizing between the barrel and the screw. It is manufactured by sending it to a die, molding it under high pressure, and curing it.

Therefore, the obtained molded and cured product is dense and has a high density. In addition, in order to maintain the shape of the molded and cured body until it is cured and to increase the strength of the cured body itself, especially bending strength and impact strength, asbestos is added as a reinforcing material in the molding material. Was there.

[0004]

However, asbestos has come to be used in recent years due to its adverse effects on the human body, and despite its excellent performance, there is a tendency to discontinue use. Asbestos is replaced with various organic fibers. Alternatively, many methods of using inorganic fibers, methods of using both in combination, and the like have been proposed.

By the way, in extrusion molding, since there is a step of sufficiently mixing and kneading materials for molding before extrusion molding, in consideration of productivity, there is a limit in the length of the fibers to be mixed. As a result, there is no choice but to use short fibers. Therefore, even in the method of using fibers other than asbestos as described above, the cut short fibers are used. However, when the short fibers are used, the fibers are three-dimensional in the molded article after extrusion molding. However, there is a problem that the reinforcing effect cannot be sufficiently exerted even in theoretical theory of fiber reinforcement, because random orientation occurs in the fiber.

Therefore, as a method which is excellent in the theory of fiber reinforcement, a method of inserting a continuous reinforcement whose directionality is regulated is disclosed in Japanese Examined Patent Publication No. 56-36044 and Japanese Unexamined Patent Publication No. 58-183209. Have been proposed to. However, since this method generally takes a method of inserting a continuous body from the rear of the mold using a crosshead die and making a multilayer of cement material around this and extruding it integrally, the device and mold structure etc. However, there has been a problem that the structure becomes complicated and that the continuous body that can be inserted therein has contracts due to the flow of the cement material in the mold.

In view of such circumstances, it is an object of the present invention to provide a manufacturing method capable of easily obtaining a high-strength hydraulic inorganic molding.

[0008]

In order to achieve such an object, the present invention provides an uncured molded body obtained by pressure extrusion molding a molding material containing a cement-based hydraulic inorganic material as a main component. When the sheet is placed on the conveying means and conveyed, the sheet-shaped reinforcing material is continuously supplied between the uncured molded body extruded from the extrusion die and the conveying means just before being placed on the conveying means, and further the pressing means. According to the present invention, a method for producing a hydraulic inorganic molded body is characterized in that the uncured molded body is pressed from above and below to immerse the sheet-shaped reinforcing material near one surface of the uncured molded body.

[0009]

According to the above construction, a hydraulic inorganic mixture is conventionally kneaded and kneaded, and the mixture is supplied to the extruder and extruded by a predetermined die. Then, as usual, the uncured molded body is taken up on a carrying means such as a take-up machine or a tray and conveyed to the next curing step, etc., but a sheet-like reinforcing material is continuously supplied onto the taking-up means. Then, the extrusion molded body is placed on the sheet-shaped reinforcing material. Next, when the uncured molded body together with the sheet-shaped reinforcing material is pressed from above and below by a pressing means such as a roller, the sheet-shaped reinforcing material is sunk in the vicinity of one surface of the uncured molded body, and both are completely adhered and integrated.

Then, by curing and curing this, a hydraulic inorganic molded body in which a sheet-like reinforcing material is evenly embedded near one surface can be obtained.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail below with reference to the drawings showing the embodiments thereof. That is, as shown in FIG. 1, the method for producing a hydraulic inorganic molded body according to the present invention is as follows. First, an inorganic molded body (hereinafter, referred to as “molded body”) is prepared from the extrusion die 1 in the same manner as conventional extrusion molding. 2) is extruded, and then the molded body 2 is placed on the conveyor 3 which is a conveying means.
The sheet-shaped reinforcing material (hereinafter, referred to as “reinforcing material”) 4 is attached to the molded body 2 so that
Is continuously supplied to the conveyor 3 immediately before being placed on the conveyor 3, and the molded body 2 is placed on the conveyor 3 via the reinforcing material 4. The supplied reinforcing material 4 is sequentially pulled while being sandwiched between the molded product 2 and the conveyor 4 by the weight of the molded product 2 and fed.

Next, the molded body 2 and the reinforcing material 4 are pressed from above and below between the roller 6 as a pressing means and the conveyor 3. By this pressing, at least a part of the reinforcing material 4 is buried in the surface portion of the uncured molded body 2, and a high adhesion force with the molded body 2 is obtained. It should be noted that the tray 5 may be used as the conveying means as shown in FIG. Further, if the pressing roller 6 is decorated with an uneven pattern or the like, the surface of the molded body 2 can be decorated at the same time. Further, the pressing may be performed not only from the upper surface but also from the lower surface, and may be performed from both upper and lower surfaces without any problem.

Then, by carrying out curing in this way, it is possible to obtain an inorganic molded body in which the sheet-shaped reinforcing material 4 is embedded along the surface portion on one side. The reinforcing member 4 is not particularly limited, but as shown in FIG.
It is preferable to use the one in which a large number of protrusions 41 are vertically provided on the molded body 2 side. When the protrusion 41 is provided in this way, the adhesion force with the molded body becomes higher due to the anchor effect of the protrusion 41.

The projection 41 is not particularly limited. For example, the projection 41 has a bent tip as shown in FIG. 4 (A), or a screw-like projection on the outer peripheral surface as shown in FIG. 4 (B). Examples thereof include those provided with stripes, those provided with concave portions on the surface as shown in FIG. 4 (C), and the like. (Example 1) After extruding a raw material composed of a mixture having the following composition from a mold, ordinary Portland cement (manufactured by Nippon Cement Co., Ltd.) 100 parts by weight fly ash (manufactured by KANDENOKA CORPORATION, Blaine value 3000) 40 parts by weight vinylon fiber ( Kuraray Co., Ltd., trade name, RM186 fiber length 6 mm) 2 parts by weight methyl cellulose (Shin-Etsu Chemical Co., Ltd., trade name, SH-30000) 2 parts by weight As a reinforcing material, glass fiber reinforced FRP mesh (pitch 35 mm, wire diameter 2 mm) ), A molded body having a width of 300 mm and a thickness of 15 mm is prepared by the method of the present invention by using a product provided with a plurality of protrusions having the shape shown in FIG.
A cured product was obtained by curing under heat and humidity for 14 hours at a relative humidity of 100% and a temperature of 60 ° C. (Example 2) Glass fiber reinforced F having no protrusions as a reinforcing material
A cured product was obtained in the same manner as in Example 1 except that an RP mesh (pitch: 35 mm, wire diameter: 2 mm) was used. (Comparative Example 1) A cured product was obtained in the same manner as in Example 1 except that the reinforcing material was not used.

A bending test was carried out on each of the cured products obtained in Examples 1 and 2 and Comparative Example 1. The bending strength of Example 1 was 290 kg / cm ² , and the bending strength of Example 2 was 250 kg. / Cm ² , and the bending strength of Comparative Example 1 was 130 kg / cm ² , and it was found that the molded and cured product according to the present invention exhibits excellent strength.

[0016]

EFFECTS OF THE INVENTION Since the method for producing a hydraulic inorganic molded body according to the present invention is configured as described above, the pressing means is provided in the conveying means part of the conventional extruder, and
Fiber reinforcement in which a sheet-shaped reinforcing material is uniformly embedded on one side surface by a simple equipment modification such that the reinforcing material is supplied between the extruded body and the conveying means. When the side having the reinforcing material embedded therein is used as the back surface, a molded and hardened body having excellent strength against a load from the front surface can be obtained.

[Brief description of drawings]

FIG. 1 is a schematic view showing an example of an apparatus for carrying out the method for producing a hydraulic inorganic molded body according to the present invention.

FIG. 2 is a schematic diagram showing another example thereof.

FIG. 3 is a perspective view showing an example of a sheet-shaped reinforcing material.

FIG. 4 is an explanatory diagram showing three examples of the shape of the protrusion.

[Explanation of symbols]

 1 Extrusion Mold 2 Uncured Molded Body 3 Conveyor (Conveying Means) 4 Sheet Reinforcing Material 5 Tray (Conveying Means) 6 Rollers (Pressing Means)

Claims (1)

Claim: What is claimed is: 1. An extrusion die for carrying an uncured molded product obtained by pressure extrusion molding a molding material containing a cement-based hydraulic inorganic material as a main component, and carrying the uncured molded product on a transportation means. Immediately before the uncured molded body extruded from the mold is placed on the conveying means, a sheet-like reinforcing material is continuously supplied between the uncured molded body and the conveying means, and the uncured molded body is pressed from above and below by the pressing means. A method for producing a hydraulic inorganic molded body, characterized in that a sheet-shaped reinforcing material is immersed near one surface of an uncured molded body.