JPS60241957A - Method and machine for spraying rock wool - Google Patents

Abstract

PURPOSE:To reduce its cost with a continuous operation by introducing a rock wool fiber which is loosened and sent in into a mixing chamber, sprinkling cement while agitating the rock wool fiber in the mixing chamber, and sending the coated fiber pneumatically. CONSTITUTION:Rock wool fiber and cement are introduced into a mixing chamber 6, and agitated and mixed by the revolution of a mixing and agitating shaft 7 to deposit cement on the rock wool fiber. A spray material is thus prepared. The spray material is pressed against a delivery impeller 7b by the thrust of a screw feeder 3 in the mixing chamber, and sent out into a rotary valve chamber 11 which is positioned at the lower side from the lower-end outlet 4b by the centrifugal force of the delivery impeller 7b. The rotary valve 12 is provided in the rotary valve chamber 11 and rotated so that the leading end of the blade may be brought into contact with the inner wall of the rotary valve chamber 11.

Description

Detailed Description of the Invention (Field of Industrial Application) This invention is a method of applying rock wool together with cement to the walls and ceilings of steel-framed or concrete buildings for the purpose of fireproofing, soundproofing, heat insulation, etc. This article relates to spraying methods and rock wool spraying machines.

(Prior Art) Conventional rock wool spraying methods are roughly divided into three methods: dry method @ wet method 2 θ semi-wet method.

■The dry method is a method in which a pre-prepared spraying material, in which cement is attached to asbestos fibers using oil as a medium, is sent under air pressure, and the mixture is mixed with water, which is pumped separately, in the spray gun section, and then sprayed.

In this method, the spraying machine itself is relatively simple, but the material to be sprayed is prepared in advance and is expensive, so the cost is high in terms of material costs, and dust is generated during spraying. The disadvantage is that it spoils the working environment.

The wet method is a method in which rock wool fibers, cement, and water are kneaded into a slurry, which is then pumped and sprayed.

This method has extremely high resistance to pumping mud, so it requires a lot of power, and the equipment is large and expensive, so it is difficult to use unless it is a large-scale construction project, and it is difficult to make small adjustments. The disadvantage is that it is difficult for small businesses to own the equipment, so it is not suitable for the general public.

The θ semi-wet method is an intermediate method between the former two methods, in which rock wool fibers and slurry cement are pumped separately, combined in a spray gun, and sprayed.

Although this method is a little easier to pump muddy cement than the wet method, the disadvantage is that the equipment is expensive because of the large tension resistance, and the pump is prone to failure.

(Problems to be Solved by the Invention) The present invention solves the problems of the above-mentioned conventional methods, such as high material cost, dust pollution, high equipment cost, and hemorrhoids that are difficult to simplify, using a unique method and device. The purpose is to

(Means for solving the problem) In other words, a mixture of rock wool fiber and cement, similar to that used in the dry process, is continuously prepared in a spray machine without using oil or fat. The rock wool fibers are defibrated by stirring or other means, and the continuously fed rock wool fibers are moistened by spraying water as necessary, and then introduced into a mixing chamber.
Rock wool is made by continuously stirring the rock wool fibers in a mixing chamber, sprinkling the mixture with cement, sending the mixture under air pressure, mixing it with water in the spray gun, and spraying it onto the surface to be coated. This is a cotton spraying method.

In addition, the cement is stirred in a rock wool spraying machine equipped with a defibration device that stirs and decomposes the rock wool, a screw feeder that transfers the rock wool fibers to one side, and an air pressure feeding device that sends the spraying material to the spray gun. A cement supply device that continuously sprinkles cement onto the rock wool fibers, an agitation mixer that mixes and adheres cement to the rock wool fibers, and a rotary valve that continuously supplies the agitated and mixed spray material in fixed amounts to the pneumatic feeding device. This is a rock wool spraying machine with a built-in

(Function) This rock wool spraying method is an improved method of the conventional dry method mentioned above, and in the conventional dry method, a spray material is prepared in advance by adhering cement to rock wool fibers using a mixture of oil and fat as a medium. However, in the present invention, a spray material made of rock wool fibers mixed with cement is prepared using a rock wool spray machine. The materials used are rock wool, cement, and water.

The rock wool fibers are stirred and defibrated in the rock wool hopper of the rock wool spraying machine and sent to the mixing chamber connected to the end of the screw feeder by a screw feeder installed horizontally at the bottom of the hopper.
In some cases, an appropriate amount of water is sprayed onto the rock wool fibers to moisten them during transportation in the screw feeder or near the entrance of the mixing chamber.

Providing appropriate moisture to the rock wool fibers in this way makes it easier for cement to adhere to the rock wool NBm, and has the effect of preventing the generation of dust at the outlet of the spray gun during spraying. However, care must be taken as too much water will make it difficult to pump air into the spray gun.

In the mixing chamber, while the rock wool fibers are stirred by a mixing blade, a fixed amount of cement is continuously sprinkled from above the mixing chamber using a rotary feeder installed at the bottom of a cement potper that has a cement stirring blade inside. The rock wool fibers and cement are mixed and adhered to the cotton fibers, and the spraying material mixed with the rock wool fibers and cement is sent to the rotary valve at the bottom of the mixing chamber, and the rotary valve continuously sends a fixed amount of it into the pneumatic feed path and into the spray gun. It is pumped by air, mixed with water that is pumped separately by a spray gun, and sprayed onto the surface to be coated.

By this method, if rock wool raw material and cement are placed in their respective hoppers, they can be continuously sprayed in fixed amounts.

(Example) Embodiments of the rock wool spraying machine will be described below based on the drawings.

(1) is a rock wool hopper with many stirring rods (2a
) is installed horizontally with a stirring shaft (2) protruding at various angles to defibrate the rock wool into pieces, and a screw feeder (3) parallel to this stirring shaft is placed at the bottom of the rock wool hopper (1). The defibrated rock wool is placed horizontally and transferred in the direction of arrow P.

(4) is an injection nozzle installed at the bottom of the rock wool hopper (1) near the end of the screw feeder (3), and sprays water sent from the water pump (5) onto the rock wool fibers to remove moisture. It is something to give. The position of this injection nozzle (4) is
In addition, the entrance of the mixing chamber (6), the screw feeder (3)
) may be installed on the screw feeder shaft through the nozzle, and the number of injection nozzles is not limited to one location, but may be installed in several locations. There are cases where the rock wool fibers are not moistened; in this case, the water supply from the water pump (5) can be stopped.

A mixing chamber (6) that is located at the end of the screw feeder (3) and opened on the screw feeder (3) side is formed to receive the rock wool fibers fed by the screw feeder (3). 6), several mixing stirring rods (7a) are provided protruding from the outer periphery of the mixing stirring shaft (7), and a delivery vane is placed near the end opposite to the inlet from the screw feeder (3). A hollow mixing and stirring shaft (7) equipped with a wheel (7b) is rotatably fitted onto the shaft of the screw feeder (3), and its rotation is controlled by the screw feeder (3) in a separate system. feeder(
3) Faster rotation.

A cement hopper (8) is provided with a cement supply port (8a) that opens at the upper end opening (6a) of the mixing chamber (6), and a cement stirring blade (9) is installed in this cement hopper (8).
) is placed horizontally to stir the cement, and a rotary feeder θQ is fitted and fixed to the rock wool stirring shaft (2) in the vicinity of the cement supply port (8 &), and the rock wool stirring shaft (2 ) are provided with axial protrusions (10&) on the circumference, and on both sides of the rotary feeder OI, spirals g (40b) are provided on the outer periphery of the cylinder with twists in opposite directions, so that this part By rotating the rotary feeder DI while acting to move the cement toward the rotary feeder 0Q, the cement contained in the protrusions (10a) is continuously supplied into the mixing chamber (6) and sprinkled on the rock wool fibers.

The rock wool fibers and cement thus entered into the mixing chamber (6) are stirred by the rotation of the mixing stirring shaft (7), mixed, and the cement is adhered to the rock wool fibers, thereby preparing a spraying material. This sprayed material is pressed against the delivery impeller (7b) in the mixing chamber by the thrust of the screw feeder (3), and the lower end outlet (
4b) to the rotary valve chamber Qη located below.

The rotary valve chamber 0]) is formed into a cylindrical shape, and has several blades arranged radially inside so that the rotary valve 0 is rotated with the tips of the blades in contact with the inner wall of the rotary valve chamber 0◇. The upper end is an upper inlet (l1m) communicating with the lower outlet (6b) of the mixing chamber, and the lower end is a lower end opening (Ilb) communicating with the pneumatic feed line 01, and the spraying material enters the upper inlet (11a). Enter the chamber divided by the blade of the rotary valve 02 and the inner wall of the four-tally valve chamber 0), turn 1/2 turn, and open the lower end opening (
The air is continuously supplied from the air pressure feed line (+1) from the air blower 0, and is sent to the spray nozzle (not shown) by pressure air from the blower 0 in the direction of the arrow q, where it is combined with water at the spray nozzle. It is sprayed onto the surface to be coated.

The rock wool fiber and cement feeding graves are screw feeder (3), rotary feeder OO, and delivery impeller (7).
b), the balance can be achieved by appropriately setting the size and rotation speed of the rotary valve 0, etc., and the amount of water that moistens the rock wool fibers can also be adjusted using a flow rate regulating valve or a pressure regulating valve.

In the figure, Qf9 is the switchboard, 0Q is the handle, θ71 (17
A) shows the wheels, and (G) shows the shutter that opens and closes the cement supply port (8&).

(Effect of the invention) Since this invention is as detailed above, the conventional dry method is
Instead of using pre-prepared spraying material, which is expensive, we use a spraying machine to spray the material while preparing it, making it extremely economical and effective for attaching cement to rock wool fibers. By spraying water instead of conventional oil to provide moisture, material costs can be reduced, and cement can be better adhered to rock wool fibers, reducing or almost eliminating dust pollution. In addition, the rock wool spraying machine is a conventional dry type with a cement supply device and stirring/mixing device added, so it is relatively simple and can be compared to the conventional wet type. Unlike large and expensive products such as semi-wet or semi-wet methods, it can be provided at a low price, so even small and medium-sized businesses can use it. This has excellent effects in terms of efficiency and economy.

[Brief explanation of drawings]

FIG. 1 is a cutaway side view of essential parts showing an embodiment of the rock wool spraying machine of the present invention, and FIG. 2 is a sectional view taken along the line A--A in FIG. (1)...Rock wool hopper (2)...Rock wool stirring shaft (
3)...Screw feeder (4)...Injection nozzle (5>...Water pump (6)...Mixing chamber (7)
)...Mixing stirring shaft (8)...Cement hopper
(9)...Cement stirring blade 00...4-tally tweeter 0◇...Kuma rotary valve chamber 0--Rotary valve 0″4...Pneumatic feed path 0◆...Blower patent applicant Tetsuo Morisawa

Claims (1)

[Claims] ■ Guide the defibrated and continuously fed rock wool fibers to a mixing chamber,
While stirring the rock wool fibers in the mixing chamber, cement is mixed and adhered to the fibers, which is then fed by air pressure, mixed with water in the spray gun, and sprayed onto the surface to be coated. A rock wool spraying method characterized by: ■The defibrated rock wool fibers that are continuously fed are moistened by spraying water and guided into a mixing chamber, where the rock wool fibers are mixed and adhered by being sprinkled with cement while stirring. A rock wool spraying method characterized by continuously performing a series of operations in which air is fed under pressure, mixed with water in a spray gun, and sprayed onto the surface to be coated. ■A rock wool spraying machine equipped with a defibration device that stirs and decomposes rock wool, a screw feeder that transfers rock wool fibers to one side, and an air pressure feeding device that sends the spraying material to a spray gun while stirring the cement. , a cement supply device that continuously sprinkles the rock wool fibers, an agitation mixer that mixes and adheres cement to the rock wool fibers, and a rotary pulp unit that continuously supplies the agitated and mixed spray material in fixed quantities to the pneumatic feeding device. A rock wool spraying machine featuring a built-in structure.