JPH0442965B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to an extrusion manufacturing method for an inorganic product reinforced with a fibrous reinforcing material, which is used, for example, as a building material.

(Prior art) Conventionally, as an extrusion manufacturing method for this type of inorganic product,
For example, as shown in Japanese Patent Application Laid-open No. 55-85480,
Extrusion consisting of embedding a fibrous reinforcing material impregnated with an inorganic composition of the same type in an inorganic composition such as cement or gypsum, extruding the same at the same time, and then curing the extruded product. The manufacturing method is known.

(Problems to be Solved by the Invention) In the conventional extrusion manufacturing method of inorganic products, the binding strength between the fibrous reinforcing material and the inorganic composition is not so large, so the bending strength of the obtained inorganic product is low. It has the disadvantage that it is not very large.

(Means for Solving the Problems) The present invention aims to eliminate the disadvantages of the conventional methods and provide an extrusion manufacturing method for inorganic products with excellent bending strength. In this method, a fibrous reinforcing material is embedded, which is made up of a plurality of fibers and is impregnated with a thermosetting bonding curing agent that binds these fibers together and at the same time binds these fibers together with the inorganic composition by curing. The inorganic composition and the bond curing agent of the extruded body are then simultaneously heated and cured. Examples of the inorganic composition include all kinds of inorganic compositions such as various cements such as Portland cement, alumina cement, blast furnace cement, silica cement, and flyash cement, and gypsum.

These inorganic compositions include grinding aids, setting retarders, hardening accelerators, water reducers, coagulants, thickeners, AE
Needless to say, various admixtures such as additives and aggregates of appropriate particle size can be added.

In addition, inorganic compositions include asbestos, inorganic fibers such as glass fibers, carbon fibers, and ceramic fibers, aromatic polyamides, aromatic polyetheramides, polyolefins, polyvinyl alcohol, polyesters,
Short fibers such as organic fibers such as polyamide and polyacrylonitrile may be blended to improve the toughness of the resulting inorganic product.

Examples of fibrous reinforcing materials include inorganic fibers such as carbon fiber, alkali-resistant glass fiber, and ceramic fiber, organic fibers such as aromatic polyamide, aromatic polyetheramide, polyester, polyamide, polyolefin, polyvinyl alcohol, and polyacrylonitrile, and piano wire. , various fibers such as metal fibers such as steel wire for prestressing, for example, roving, cross,
A material constructed into a desired shape such as a net or mat is used.

As a bond curing agent, room temperature or thermosetting resin such as epoxy type, polyester type, vinyl ester type, phenol type, polyimide type, etc., room temperature or thermosetting resin such as alkali metal silicate type, colloidal silica type, phosphate type etc. Heat-curable inorganic materials, room temperature or heat-curable organic/inorganic composite materials, etc. are used.

An embodiment of the extrusion manufacturing method for inorganic products of the present invention will be described below with reference to the accompanying drawings.

In the figure, reference numeral 1 indicates a vacuum extruder used in the production method of the present invention, in which an upper screw cylinder 3 and a lower screw cylinder 4 are communicated with each other via a vacuum chamber 2, and one end of the upper screw cylinder 3 is connected to one end of the upper screw cylinder 3. Hopper 6 for supplying inorganic composition 5
At the same time, a die 10 equipped with a die slot 9 of a desired shape is connected to the end of the lower screw cylinder 4 via an adapter 8 for introducing the fibrous reinforcing material 7. In the illustrated adapter 8, a fibrous reinforcing material 7 consisting of a rod-shaped fibrous body in which carbon fiber rovings 13 are aligned through an impregnating tank 12 with a bond hardening agent 11 is attached, only one of which is shown in the figure. We decided to introduce multiple copies. The dice 10
A transfer conveyor 14 is disposed in front of the conveyor 14, and the extrusion molded product 15 is cut into a desired length by a cutter 16 and then transferred onto a pallet 17 in front of the conveyor 14.
In addition, 18 in the figure is the screw cylinder 3, 4.
Shows the screw inside.

Here, an example of extrusion production of an inorganic product using the vacuum extruder 1 is shown. First, an inorganic composition 5 mainly composed of, for example, Portland cement is supplied to the hopper 6. The supplied inorganic composition 5 is transported inside the upper screw cylinder 3 while being cut into small particles by the screw 18 and transported to the vacuum chamber 2, and after being degassed in the vacuum chamber 2, it is transferred to the lower screw cylinder 4. and is guided to the adapter 8.

At the same time, a plurality of fibrous reinforcing materials 7 made of rod-shaped fibrous bodies made of aligned carbon fiber rovings 13 are passed through an impregnating tank 12 with a bonding hardening agent 11 made of a thermosetting resin. are impregnated with the bond hardening agent 11, and these fibrous reinforcing materials 7 are introduced into the adapter 8 and embedded at a desired position in the inorganic composition 5 extruded from the lower screw cylinder 4.

In this way, the inorganic composition 5 and the fibrous reinforcing material 7 are formed into a desired shape through the die slot 9 of the die 10,
In the illustrated example, the extrusion molded body 15 is simultaneously extruded into a hollow square body, and cut into a desired length by a cutter 16 while being transported forward by a transfer conveyor 14, and the cut extrusion molded body 15 is cut into a desired length. The extruded product 1 is placed on a pallet 17 in front of the conveyor 14 and transferred to an autoclave (not shown).
The inorganic composition 5 of No. 5 and the bond hardening agent 11 impregnated into the fibrous reinforcing material 7 are simultaneously cured in an autoclave to obtain an inorganic product.

The inorganic composition 5 is dried and cured by heating in an autoclave, and the bonding curing agent 11 impregnated in the fibrous reinforcing material 7 is bonded to the cured inorganic composition 5 and cured, so that the inorganic composition 5 and the fibrous reinforcing material 7 are strongly bonded together, and at the same time, the carbon fibers of the fibrous reinforcing material 7 are bonded and fixed to each other by curing of the bonding hardening agent 11, so bending stress is applied to the manufactured inorganic product. Even if the product is bent, the fibrous reinforcing material 7 supports that force, increasing the bending strength of the product.

In the above embodiment, the fibrous reinforcement 7 has a diameter of
It is composed of 40,000 carbon fibers of 1.5 microns arranged in a row, eight fibrous reinforcing materials 7 of this structure are used, and an epoxy resin is used as a thermosetting bond hardening agent 11 to be impregnated into the fibrous reinforcing materials 7. used, and the outer diameter is
A square hollow inorganic product measuring 20 cm x 20 cm, wall thickness 2 cm, and length 200 cm was prepared, and its bending strength was tested and found to be approximately 150 Kg/cm ² . This was 4 to 5 times stronger than a conventional inorganic product of the same shape and size, which was made by mixing cement with a fibrous reinforcing material and extruding it.

(Effects of the Invention) According to the present invention, a fibrous reinforcing material impregnated with a binding hardening agent is embedded in an inorganic composition such as cement or gypsum, and this is simultaneously extruded. Since the inorganic composition and the bonding hardening agent of the extruded body are simultaneously cured, the inorganic composition and the fibrous reinforcing material are strongly bonded to each other, and an inorganic product having excellent bending strength can be easily produced. It has the effect of

[Brief explanation of the drawing]

FIG. 1 is a process diagram of an embodiment of the extrusion manufacturing method for inorganic products of the present invention, and FIG. 2 is a perspective view of the obtained inorganic products. 5... Inorganic composition, 7... Fibrous reinforcement material, 1
1... Bond hardening agent, 15... Extrusion molded body.

Claims (1)

[Claims] 1. Impregnating an inorganic composition such as cement or gypsum with a thermosetting bonding hardening agent that is made up of multiple fibers and simultaneously binds these fibers together and simultaneously binds these fibers together with the inorganic composition by curing. A method for producing an inorganic product by extrusion comprising embedding a fibrous reinforcing material and simultaneously extruding the reinforcing material, and then heating and curing the inorganic composition and the bond curing agent of the extruded body at the same time.