JPS5845911A - Manufacture of fiber reinforced cement product through press method - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a continuous flat plate with a lip that protrudes in one downward direction from its F face or lower face or both upper and lower surfaces, such as a soundproof wall having a reinforcing lip in the center. It is one of the methods of manufacturing fiber reinforced cement products having parts 1, details:
Fiber-reinforced cement products manufactured using a press method in which cement mortar mixed with reinforcing fibers such as glass fiber or carbon fiber is supplied between a pair of upper and lower molds, and in good condition is pressed between the upper and lower molds to form a specified shape. Relating to a manufacturing method.

In the conventional method of this type, no control was carried out on the flow of the reinforcing fibers mentioned above, and there was a tendency peculiar to the flow of the fibers. That is, the sixth
As shown in Figure (a), uncured cement mortar mixed with fiber (a) is supplied in the form of a flat plate from a sprayer or the like between the pair of upper and lower formworks (1) and (2). At the initial stage of pressing, the fibers flow into the space for forming the lip portion as shown by the arrow, and when they are formed, the fibers exhibit a unique orientation, and upon completion of pressing and after forming, the fibers are formed as shown in FIG. Discontinuous fibers (al) m1 (dl) are formed near one surface of the lip part (n).

Such fiber discontinuities have been a weakness in the strength of the product itself.

In view of the above circumstances, it is an object of the present invention to propose a method that can avoid as much as possible the occurrence of defects in strength due to fiber orientation as described in E, by adding simple members and processes. .

The method for producing fiber-reinforced cement products by the pressing method according to the present invention is the method described in detail at the beginning, in which when cement mortar is supplied between the pair of formworks, at least the thickness of the cement mortar at the portion corresponding to the forming of the lip portion is It is characterized by the fact that the membrane body of the fiber flow control is pushed into place.

In other words, the membrane body inserted into the wall thickness of the cement mortar controls the flow of the cement mortar and the flowing fibers during pressing so as to divide the flow into upper and lower halves. For,
Although the cement mortar flows in the required amount, the flow of fibers from below is restricted, and the fibers are arranged horizontally in the cement at the bottom of the membrane, making it possible to reliably mold a product into a predetermined shape. However, due to the special orientation of the fibers, discontinuous points of the fibers do not occur in the continuous flat plate part as in the conventional method, which eliminates the problem of strength problems in the dormitory.
It has now been possible to avoid this problem as much as possible by adding simple parts and improving the process.

Hereinafter, SSs for carrying out the method of the present invention will be listed in order of steps based on illustrative drawings.

(2) A cement mortar mixed with reinforcing fiber shafts such as glass fibers or carbon fibers or appropriate proportions of both fibers is sprayed into the lower formwork (2) in the form of a flat plate using a spray gun (4).

In the case of solid wood, there is no need to pay particular attention to the shape of the lip and edge-cutting parts, and the required amount is sprayed evenly over the entire PC. 4. In the place of the front plate b, the length of the reinforcing fiber shaft (such as a horizontal wheel such as cheesecloth, net, inorganic net such as glass fiber, etc.), stainless steel tsushi (metal net of L4F) or less (preferably Insert and install the Fiber Flow Control Chill 8111 body (31), which has a diameter of 10 mm or less and does not cause any defects in strength.For this purpose, repeat the spraying at least 8 times.(See Figure 1) ) ' The insertion position of the membrane (3) varies depending on the supply amount of the cement film mixed with 11 fibers and the shape of the product to be manufactured, but as mentioned above, it should be 14 or less from the bottom of the total wall thickness. If so, there is a possibility that the membrane (3) will be exposed to the lower surface (product surface) and the thickness of the part where the fibers are horizontally oriented is too thin. For example, thick 1
7. From the position E, we obtained experimental results in which the effect of flow control was not clearly apparent.

In addition, the membrane body T31 itself to be inserted has sufficient rigidity.
If the material is a polyethylene sheet that does not have a 1-coat or a polyethylene sheet, apply the sieve only to the position where the problem occurs.
It is sufficient to insert 1, but if the cement itself has sufficient rigidity, such as an organic net, and the cement below 1 hardens as one with a membrane in between, compare the parts corresponding to the rig part molding. It is desirable to insert one with a large target area.

■ While operating the vibration motor (51) attached to the lower formwork (2) to vibrate the lower formwork (2), the upper formwork (1
) to the lower formwork (21 side) using a hydraulic press or the like, the fiber-containing cement mortar is applied to the upper and lower formworks (1
11 (21 pairs have a predetermined shape, one continuous flat plate part (
From A4) to the same side rising part (AI) and central rig part (A, )
and are integrally formed into a protruding form. (See Figure 3) At this time, the presence of the drag body [31] controls the flow of cement mortar so that it is divided into two parts under h, so the space for forming the lip part that the upper formwork (1) has The flow of fibers into the fibers is suppressed, and the fibers are oriented in a continuous state.

■ The perforated iron plate (IA) constituting the containment suppression part on the formwork (1) side is attached to the surface and is able to maintain its shape by the suction force of a vacuum pump (not shown) through the nine filters (6). (See Figure 8.) ■ After dewatering, pull up the upper formwork (1) and let it harden, and remove the lower formwork (21) as shown in Figure 4. Obtain such delicate reinforced cement product drawings.

Incidentally, the products to be manufactured according to the method of the present invention, other than those shown in FIG. 4, have a plurality of rig parts and have a turtle or grid-like rig part, and are 4jlL.

[Brief explanation of the drawing]

The drawings illustrate an embodiment of the method for manufacturing fiber-reinforced cement products by the pressing method according to the zero-start 1'IEIVc method, and Figures 1 to 8 are longitudinal cross-sectional views of the manufacturing process, and Figure 4 shows a part of the product. A broken perspective view, Fig. 5), and Fig. 5) are enlarged longitudinal cross-sectional views of main parts for explaining the occurrence of defects due to the conventional method. (1)...Upper formwork, (2)...Lower formwork, 13)...Cap body, prisoner...Product, (in) ...Continuous flat plate part, (n) ...Rif part, shaft) ...Sacrificial fiber for reinforcement, ---Cement mortar.

Claims (1)

[Claims] '■ Cement mortar mixed with reinforcing edge 1111 (!l) is supplied between the upper and lower formworks (1), +21 pairs, and the upper and lower formworks (1), (21) are ) A method for producing a delicate reinforced cement product having a continuous flat plate part (A, ) and a lip part (C) by pressing at
When supplying cement mortar between the formworks (11, +21 pairs), it is considered that a membrane body (3) for fiber flow control is inserted and installed within the thickness of the cement mortar at least at the portion corresponding to the lip (input) molding. A method for producing a fiber-reinforced upper mepanto product by a pressing method, characterized by applying vibration during pressing by the pair of upper and lower formworks +11 and +21.Claim No. 1:
Production of fiber-reinforced cement products by the pressing method described in Section 'H method. ■ The insertion position of the membrane body (3) is the continuous flat plate part (AI
) The lower surface of the cement mortar wall thickness that corresponds to the formation equivalent location or ') 71''/4 to b. Manufacture of fiber reinforced cement products by the pressing method according to claim 0 or 0. Method. ■ A method for producing a delicate reinforced cement product by the pressing method according to any one of claims 0 to 0, wherein the membrane (3) is an organic net such as cheesecloth. ■ The membrane ( 31 is an inorganic net such as glass fiber. A method for manufacturing a fiber-reinforced cement product by a pressing method according to any one of claims 0 to 0. ■ The membrane body +31 is a metal such as stainless steel mesh. A method for producing a fiber-reinforced cement product by a pressing method according to any one of claims 0 to 0, which is a net.