JPS58175618A - Continuous manufacture of glass fiber reinforced cement board - 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 relates to a method for continuously manufacturing glass fiber reinforced cement boards, which are mainly used as building materials such as interior and exterior wall materials, fireproofing materials, soundproofing materials, and the like.

As a conventional method of this kind, there is a method filed by the applicant of the present invention (VF Application No. 55-99647), but in this method, a bare trench with no sheet or the like applied on the top surface is used. Since the laminate is vibrated by a vibrating body, excess water in the laminate tends to accumulate on the top surface of the laminate, which causes depressions in the surface layer of the laminate and deteriorates the finished surface. The disadvantages include that it cannot be formed smoothly and it is difficult to supply high-quality products.

This invention solves the above-mentioned drawbacks of the conventional method, and provides a method for manufacturing glass fiber reinforced cement boards that can reliably prevent excess water from accumulating on the top surface of the laminate and can supply a high-quality product. The purpose is to

The present invention will be described with reference to embodiments shown in the drawings. 1st
In the figure, A is a conveyor consisting of an endless belt 1 mounted on a pair of front and rear pulleys 2.2, and is configured to run at a constant speed in the direction of the arrow by an appropriate drive device (not shown). . Reference numeral 3 is provided mainly at the rear end of the conveyor A, and an air blower 14 for blowing air onto the belt 1 to clean it is a device for spraying a release agent onto the belt 1.

Reference numeral B denotes a long glass fiber feeding device, and 5 a net-like material of about 10R pitch made of long glass fibers, and this net-like material is placed on the belt 1 by the drawer rows 26 and 6'. This is called the a layer.

C is a short glass fiber feeding device, and 7 is a cart that reciprocates in the width direction of the conveyor A along a rail 8 provided above the conveyor A. A roving cutter 9 is attached to this cart so as to be adjustable in the vertical direction. ing. Reference numeral 10 denotes a glass fiber roving, and this roving 10 is cut into short pieces by a cutter 9 and sprayed onto layer a as short fibers 10'. This is called the b layer.

D is a feeding device for cement mortar containing ultra-fast hardening cement, which feeds the mortar of ordinary cement mixed in the mixer 12 to the dump truck 13, and the mortar pump 13 adjusts the discharge amount to a desired amount with the variable speed motor 14 to feed the mortar. Dispense a fixed amount. On the other hand, ultra-fast hardening cement and water are mixed in the tank 15 and sent to the metering pump 16.
is adjusted to an arbitrary discharge amount using the adjustment hole 17 and discharged at a fixed amount. A hardening accelerator (setter) for adjusting the hardening time of the ultra-fast hardening cement is mixed with water in a tank 18 and sent to a metering pump 19.The ultra-fast hardening cement and setter are mixed and stirred in a mixer 21 to add the ultra-fast hardening cement. Make a mortar. This mortar 22 is charged onto layer b by a charging device provided on a cart 24 that reciprocates in the width direction of the conveyor A along a rail 23 provided above the conveyor 4A. The above truck has a hose 25 for feeding mortar.
is installed so that it can be adjusted vertically. A thickness adjusting device 26 is provided immediately after the mortar injection point.
As a result, the thickness of the mortar 22 is kept constant to form the deposited layer C. A lower vibrating body 27 is provided on the lower side of the belt 1 facing the adjustment device 26, and its vibration causes the mortar 22 to permeate the glass fiber layer and zero layer on the belt, and the brd and zero This layer forms the lower layer ① of the GRC.

When the mortar 22 placed on the conveyor A is poorly hardened and soft, the hardening state can be improved by increasing the amount of ultra-fast hardening cement discharged using the adjustment knob 17 of the pump 16. Further, when the curing start time is early, the curing time can be lengthened by increasing the discharge amount of the setter using the adjustment knob 20 of the pump 19. In this way, manufacturing can be carried out while freely adjusting the hardening state and hardening start time of the mortar 22 using the adjusting knobs 17 and 20 of the metering pump.

On the other hand, ultra-fast hardening cement, setter and water are mixed in the tank 15 and sent to the metering pump 16.
is adjusted to an arbitrary discharge amount with an adjustment knob 17 to achieve a constant discharge, and is mixed and stirred with ordinary cement mortar discharged in a constant quantity from the pump 13 in a mixer 21 to form a mortar 22 containing ultra-fast hardening cement. The mortar 22 is loaded onto the conveyor 1 by a loading device, but depending on the hardening state of the mortar 22 and the hardening time, the mortar 22 remains fixed. Adjust with the adjustment knob 17 of the amplifier 16.

However, the combination of ultra-fast hardening cement and setter in the tank 15 is set to the best ratio based on experiments, and the curing state and curing time are slightly adjusted using the adjustment knob 17. In this case, there is also a method of manufacturing without using the setter tank 18 and metering pump 19.

In this way, each material of the ultra-fast hardening cement mortar is prepared separately and mixed together before use, which makes it possible to reduce wasted stock. Thickness can be easily adjusted by feeding in the width direction.

E is a device similar to B, and 31 is a mesh made of long glass fibers with a pitch of about 10 rNIN, and this mesh is placed on top of 90 layers by drawing rollers 32 and 32'.

This is called the d layer. 6- F is a device similar to C; 34 is a cart that reciprocates in the width direction of the conveyor A along a rail 35 like the carts 7 and 24; a roving cutter 36 is mounted on this cart 34 and can be adjusted vertically; It is installed on.

37 is a glass fiber roving, and this roving 37 is cut into short pieces by a cutter 36 and sprayed onto the d layer as short fibers 37'. This is called the e layer. G is sheet feeding device, 41 is vinyl, nylon, polypropylene,
This sheet is made of non-water-absorbing resin such as polyester or polystyrene, or rubber.
42 and 42' are placed on top of the Je layer. sheet 4
1 may be somewhat hydrophilic. In addition, in the width direction and length direction of the sheet 41, a large number of through holes 43 having a predetermined pitch and hole diameter are arranged in a grid pattern (FIG. 2) across the gold mine.
Alternatively, they are arranged in a staggered pattern (Figure 3). As described above, the mortar 22 penetrates into the glass fiber layers d and e on the upper surface of the laminate with the sheet 41 attached to the upper surface by vibration of the upper vibrating body 44° 44' provided above the belt 1. These layers d and e form an upper layer I, which is bonded to the lower layer 2 so as to sandwich an intermediate layer 2 made of a mixture of ordinary cement mortar and ultra-fast hardening cement. Further, a lower vibrating body 45 is provided below the belt 1 facing the upper vibrating bodies 44 and 44', and vibrates so that the mortar 22 further penetrates into the lower layer (■) and the upper layer (2) of the glass fibers. It is designed to give. Due to these vibrations, excess water in the mortar 22 is evenly exposed on the upper surface of the sheet through the through holes 43 of the sheet 41.

Further, the laminate is finished by finishing rollers 46 for each layer 1. I
I, I are pressurized so that they are fixed, and the material is separated from the bell) 1 and sent onto the feed rollers 48, 48', while the sheet 41 is placed at the exit of the curing chamber H. It is wound up by a roller 49 and removed from the laminate.

The laminate fed onto the feed rollers 48 and 48' is trimmed to a constant width with a longitudinal cutter 5° provided on the feed roller, and cut to a constant length with a width direction cutter 51. Glass fiber reinforced cement boards (G, R, C boards) of fixed size are obtained.

1 is the scraper 5 where the laminate separated and rotated downward.
3, the deposits are removed, washed with washing water sprayed from the washing device 54, and dried with dry air blown from the air blower 55.

FIG. 4 shows a general G, R, C manufactured according to the present invention.
This is an enlarged cross-sectional view of the board, showing three layers: an upper layer I made of long and short glass fibers, an intermediate layer ■ made of a mixture of ordinary cement mortar and ultra-fast hardening cement, and a lower layer ■ made of long and short glass fibers. The upper and lower layers are 1. D.I.
Forms a glass fiber-reinforced layer impregnated with the mixed mortar of the intermediate layer (■) which resists vibration.

The content of glass fibers in ordinary cement is preferably in the range of 1 to 10% by weight from the viewpoint of mechanical properties and formability. The long glass fibers are a network of woven or knitted fabrics with a pitch of about 9-10, and are closely bonded to the mixed mortar layer (1) and the short glass fibers, greatly increasing the tensile strength and bending strength. The content of the ultra-rapid hardening cement in the mixed mortar layer (1) is preferably 5 to 50% by weight, preferably 10 to 40% by weight, based on the ordinary cement, from the viewpoint of fluidity and hardening properties.

In the above embodiments, the laminate is composed of an upper layer I made of long and short glass fibers, an intermediate layer ■ made of a mixture of ordinary cement mortar and ultra-fast hardening cement, and a lower layer ■ made of long and short glass fibers. However, it goes without saying that the structure is not limited to this, and that either the upper or lower layer may be omitted.

The present invention is as described above, and includes a large number of gold mines in the width direction and length direction on the upper surface of the laminate formed by supplying long and short glass fibers and a mixture of ordinary cement mortar and ultra-fast hardening cement onto a running endless belt. A resin or rubber sheet with through holes was supplied and adhered to the sheet, and then vibration was applied by a vibrating body, and excess water of the mixture generated by this vibration was removed from the through holes. rear,
Since it hardens, it is possible to prevent the formation of dents such as blisters on the top surface of the laminate, and to form a smooth finished surface.In addition, the top surface of the laminate is covered with a sheet during curing, and the surface evaporation is prevented. In order to suppress the water droplets to a minimum, curing can be improved, and since the sheet catches water droplets of steam falling on the top surface of the laminate, it is possible to prevent holes from forming on the top surface due to falling water droplets. From this point of view as well, the present invention has excellent effects in that it is possible to supply high-quality products such as improving the precision of the finished surface.

[Brief explanation of drawings]

FIG. 1 is a schematic side view showing an embodiment of the present invention, FIG. 2 is a plan view of the main part of the seat, FIG. 3 is a plan view of the main part showing a modified example of the seat, and FIG. FIG. 2 is a sectional view of a glass fiber reinforced cement board. A... Conveyor (endless belt) B, E... Long glass fiber feeding device C, F... Short glass fiber feeding device D... Cement mortar feeding device G... Sheet feeding device H... Steam curing room

Claims (1)

[Claims] 1. On the upper surface of the laminate formed by supplying long and short glass fibers and a mixture of ordinary cement mortar and ultra-fast hardening cement onto a running endless belt, the total t in the width direction and length direction is
A sheet made of resin or rubber having a large number of holes perforated over jy is supplied and adhered to the sheet, vibration is applied to the vibrating body, and excess water of the mixture generated by this vibration is removed from the hole. A continuous manufacturing method for a glass fiber reinforced cement board, characterized in that the glass fiber reinforced cement board is cured after being cured.