JP2760281B2 - ALC material slurry injection device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for injecting a raw slurry of ALC (lightweight cellular concrete) into a mold.

[0002]

2. Description of the Related Art Conventionally, when an ALC panel is manufactured, a plurality of reinforcing steel cages are set in parallel on a mold at a predetermined interval, and a predetermined amount of raw material is supplied to a predetermined portion of the mold by an injection pipe. Inject the slurry. Then, the raw material slurry is foamed in the mold, and after a predetermined time, the slurry is cured to a semi-plastic state, taken out of the mold, cut into a predetermined shape with a piano wire or the like, and then charged into an autoclave and heated to a high temperature and high pressure. ALC panels of final products are manufactured by steam curing.

For example, when manufacturing a wide panel having a width of 90 cm or more, as shown in FIG.
m, one or a plurality of reinforcing steel cages 2 are set horizontally on a rectangular parallelepiped mold 1 having a length of about 430 cm and a depth of about 20 cm, and a raw material slurry is poured from above a central portion of the mold 1. The method, the so-called flat beating method, is adopted. However, in the flat casting method in which the raw material slurry is injected only from a predetermined portion of the mold 1, it is difficult to inject the slurry to a uniform thickness because the depth of the mold 1 is relatively shallow. 1
It is necessary to incline or to vibrate the mold 1, which has a disadvantage that the whole apparatus becomes complicated.

[0004] A setting mechanism 3 for setting the reinforcing steel cage 2 in the mold 1 is usually provided at the upper edge of the mold 1. Can be injected from In the conventional injection apparatus in that case, the mixture is caused to flow down from the mixer 3 through the valve 5 and the injection pipe 6 to the vibrating sieve 7, to remove unnecessary contaminants by the vibrating sieve 7, then to drop into the chute 8, and to further remove the slurry. Slurry injection port 9 provided between chute 8 and formwork 1 to prevent scattering
And into the central part of the mold 1. However, in this conventional apparatus and method, the number of steps of dropping the raw slurry is large and the steps are large, so that there is a drawback that air entrapment at each step is large.

[0005] That is, when air is entrained in the slurry during the injection of the raw material slurry, bubbles are generated in the raw material slurry injected into the mold 1, and particularly when giant bubbles having a diameter of 3 mm or more are generated, the final product may not be used. Crater-shaped depressions are formed on the surface of the ALC panel, which impairs the appearance. Therefore, it is necessary to repair the flat portion later, which is extremely inefficient in terms of efficiency and economy.

Further, a mold release agent is applied to the inner surface of the mold 1 to improve mold release when taking out the semi-plastic state slurry. When the slurry is injected, since the film of the release agent at the drop point is thinned or lost due to the drop of the raw material slurry from above, there is also a problem that the mold release of the semi-plastic state slurry becomes extremely poor later. .

[0007]

SUMMARY OF THE INVENTION In view of the above-mentioned circumstances, the present invention reduces the entrapment of air into the raw material slurry even when the raw material slurry for ALC is injected from above the mold.
AL which does not substantially impair the release agent applied to the mold so that the subsequent semi-plastic state slurry can be easily taken out, and that the raw material slurry can be uniformly injected into the entire mold.
An object of the present invention is to provide an apparatus for injecting a C raw material slurry.

[0008]

Means for Solving the Problems To achieve the above object, an ALC raw material slurry injection apparatus provided by the present invention is an apparatus for injecting an ALC raw material slurry into a mold from above. A flow dividing plate supported and having a skirt portion inclined downward from the central portion toward the peripheral portion, and a central portion of the flow dividing plate above the central portion of the current dividing plate such that the current dividing plate leaves a slit between the entire periphery of the lower end of the side wall and closes the bottom portion. A cylindrical retention box supported by a vibration net cage placed inside the retention box, a vibration generator attached to the vibration net cage, and a tip inserted inside the vibration net cage near the bottom surface An open injection tube.

[0009]

In the apparatus for injecting an ALC raw material slurry according to the present invention, the raw material slurry flowing out of the injection pipe passes through a vibrating mesh basket, where contaminants are removed and enters a retaining box. The stagnation box is cylindrical and the lower end is open, but a diversion plate is arranged below the lower end of the side wall to close the bottom, leaving a slit with a slight gap. A part of the liquid flows through the slit and flows out onto the flow dividing plate while a part of the liquid flows in the inside. The raw material slurry on the flow dividing plate flows down the gently inclined skirt portion, and flows down into the form from the peripheral portion.

[0010] Since the base of the injection pipe is directly connected to a mixer or a slurry storage tank, and the tip is opened near the bottom of the vibrating mesh basket, the tip of the injection pipe accumulates in the retention box when the raw slurry is injected. It is immersed and buried in the raw material slurry. Therefore, there is almost no entrainment of air in the raw material slurry at this part, and the vibrating mesh cage is always vibrating, so that clogging can be prevented and, at the same time, even if air bubbles are contained in the raw material slurry, it is miniaturized. Has the effect of doing

The aperture and vibration intensity of the vibrating mesh basket and the width of the slit from which the raw material slurry flows out are appropriately selected as necessary so that the above-mentioned flow of the raw material slurry can be obtained. For example, the aperture of the vibrating mesh basket is 1-2 mm,
It is appropriate that the frequency is 10,000 to 15000 vpm and the amplitude is about 1.0 to 2.0 mm. Further, the width of the slit is preferably in the range of several mm to several tens of mm, and most preferably about 9 mm. In addition, by mounting the lifting device on the retention box and moving the flow dividing plate in the vertical direction, the optimum slit width can always be selected according to the properties of the slurry.

Since the flow dividing plate has a gently inclined skirt portion, the flow speed of the raw material slurry is reduced, and the head of the raw material slurry can be reduced by adjusting the distance between the peripheral edge of the flow dividing plate and the mold. The air entrapment in this portion can be extremely reduced. Further, in addition to the slow falling speed of the raw material slurry and the small head, the raw material slurry is injected into a relatively wide range by dropping from the peripheral edge of the flow dividing plate. There is an advantage that the mold is hardly damaged and that the mold can be uniformly injected into the entire mold frame as compared with the case where the mold is injected at one place.

In particular, a straightening nozzle is formed between the eaves and the central plane of the flow dividing plate by forming the central portion of the flow dividing plate as a plane and projecting an eave outwardly from the entire periphery of the lower end of the side wall of the retaining box. If the raw material slurry flow is not disturbed,
Air entrainment is further reduced. Also, if a vibration generator is attached to the flow dividing plate and the flow dividing plate is vibrated, the flowability of the raw material slurry is improved, so that the raw material slurry can be effectively defoamed in a thin layer, The raw material slurry can be allowed to flow down even with a gentler inclination.

Further, the flow dividing plate, the retaining box, and the vibrating net cage may be integrally provided so as to be movable vertically and / or horizontally with respect to the formwork. These upward and downward movements, together with the above-described upward and downward movement of the flow dividing plate, help to adjust the distance of the raw material slurry falling onto the mold. In addition, the raw material slurry can be uniformly injected into the mold by moving in the horizontal direction, and since the injection position is constantly changed, the release agent applied to the mold is not damaged.
In this case, it is more effective if the peripheral edge of the lower end of the skirt portion of the flow dividing plate is formed non-linearly in the moving direction.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A specific example of an apparatus for injecting an ALC raw material slurry according to the present invention will be described with reference to FIGS. In this injection device, the gantry 1 is placed above the form 1 so as to cover the form 1.
0 is fixed, and a cylindrical storage box 13 is supported on a carriage 12 mounted on a rail 11 of a gantry 10 by a plurality of cylinders 14 serving as a vertical movement device so as to be able to move up and down.
It is suspended above the formwork 1 through a notch of 0.

A plurality of cylinders 15 are attached to the side wall of the cylindrical storage box 13, and the diversion plate 16 is supported by the cylinders 15 so as to be able to move up and down. Shunt plate 6
Has a substantially pyramidal pyramid shape (hollow), a central portion facing the lower end of the storage box 13 is a flat surface, and has a skirt portion gently inclined downward from the central portion toward the peripheral edge.

The outer peripheral portion of the flow dividing plate 16 has a decagonal shape smaller than that of the formwork 1 and has a horizontal movement direction (rail 1).
1 (in the length direction). Two vibrators 17, which are vibration generators, are attached to the skirt portion of the flow dividing plate 16, and the vibrator 17 has a frequency of 11000 vpm and an amplitude of 1 mm.

The distance between the flow dividing plate 16 and the retaining box 13 can be adjusted by the cylinder 15. An eave 19 having a width of 50 mm is fixed outwardly around the lower end of the side wall of the storage box 13, and is rectified over the entire lower end of the storage box 13 by the eave 19 and the central plane of the flow dividing plate 16. A nozzle is formed.

The opening inside the stay box 13 is 1.0 mm.
The vibrating net cage 20 is suspended via a rubber cushion 21, and the vibrating net cage 20 is provided with a rod-shaped vibrator 22 as a vibration generator. This vibrator 22
Has a frequency of 11000 vpm and an amplitude of 1.5 mm. The tip of the injection tube 6 is inserted into the vibrating mesh basket 20 and opens near the bottom of the vibrating mesh basket 20. still,
The base of the injection tube 6 is connected to the raw slurry mixer 4 via a valve 5.

Next, AL is added to the mold 1 using this injection device.
The operation of injecting the C raw material slurry will be described. The storage box 13 and the flow dividing plate 16 of this apparatus are always pulled up by the cylinder 14 and are on standby. In addition, retention box 1
The distance between the slits 18 between the lower end of the side wall of the third plate 3 and the plane of the central part of the flow dividing plate 16 is also determined in advance by the cylinder
(For example, 9 mm).

In this state, the reinforcing bar 2 is connected to the setting mechanism 3.
The formwork 1 set in accordance with
Carry below 0. Thereafter, the carriage 12 is moved to a predetermined position along the rail 11, and the cylinder 14 is further operated to lower the retaining box 13, the vibrating net cage 20, and the flow dividing plate 16, and the peripheral edge of the dividing plate 16 is The descent is stopped at a position slightly higher than 2.

While the vibrators 17 and 22 are started, the valve 5 is opened and the raw slurry is injected from the mixer 4 through the injection pipe 6. The raw material slurry flowing out of the opening of the injection pipe 6 passes through the vibrating mesh basket 20 and partially accumulates in the retaining box 13 so as to fill the front end of the injection pipe 6. And flows down uniformly over the entire circumferential direction, flows down the skirt portion of the flow dividing plate 16 slowly, and is injected into the mold 1.

Incidentally, the truck 12 may be moved along the rail 11 as necessary, so that the position at which the raw material slurry falls on the mold 1 may be constantly changed. Also, in the initial stage of the injection, the storage box 13 is kept until the raw material slurry fills the tip of the injection pipe 6.
In order to store the raw material slurry, the opening degree of the valve 5 is adjusted, or the injection of the raw material slurry is started with the slit 18 closed by operating the cylinder 15, and a predetermined amount of the raw material slurry is accumulated in the storage box 13. After that, the slit 18 may be opened by a predetermined distance.

When a predetermined amount of raw material slurry has been injected, the valve 5 is closed, the vibrators 17 and 22 are stopped, and the cylinder 14 is operated in reverse to raise the retaining box 13, the vibrating net cage 20 and the flow dividing plate 16. Thereafter, the mold 1 into which the raw material slurry has been injected is carried out, the next mold 1 is carried in, and the above operation is repeated. These operations can be performed fully automatically by computer control, but can also be performed manually.

Using the apparatus shown in FIGS. 1 and 2 and described above, the width of the slit 18 formed between the lower end (eave 19) of the storage box 13 and the flow dividing plate 16 was changed to 9 mm and 15 mm, and the ALC raw material was changed. When the slurry is injected, the mold 1
The number of huge bubbles having a size of 3 mm or more generated in the raw material slurry injected into the raw material slurry was counted. As a result, slit width 15m
m, the average was 22.0 / m ³ and the slit width was 9 mm, the average was 13.7 / m ³ .

On the other hand, when the conventional apparatus shown in FIG. 3 is used, the average number of giant bubbles having a size of 3 mm or more is usually about 148 / m ³ , and the size is often relatively large. Therefore, it can be seen that the apparatus of the present invention significantly reduces the entrapment of air into the raw material slurry, and can greatly suppress the generation of giant air bubbles.

[0027]

According to the present invention, the ALC raw material slurry is injected from above the mold, but the flow rate of the raw material slurry at the time of flowing out of the injection pipe or falling into the mold is reduced and the head is reduced. Therefore, the entrainment of air into the raw material slurry can be extremely reduced, and the bubbles in the raw material slurry can be made finer by the vibrating mesh cage, so that subsequent repair due to the generation of giant bubbles is almost unnecessary.

Further, since the flow rate of the raw material slurry injected into the mold is small and the head is small, and the raw material slurry is injected over a wide range, the raw material slurry applied to the mold is hardly impaired. Pouring can be carried out, so that the semi-plastic slurry can be easily removed from the mold later.
Further, since the raw material slurry is injected into a wide area of the mold by the flow dividing plate, instead of being injected into one portion of the mold, the uniform thickness can be achieved. It is more effective if the injection is performed while moving the flow dividing plate.

[Brief description of the drawings]

FIG. 1 is a partially cutaway schematic front view showing a specific example of an ALC raw material slurry injection apparatus according to the present invention.

FIG. 2 is a schematic plan view of the ALC raw material slurry injection device of FIG. 1 with a part cut away.

FIG. 3 is a schematic front view of a conventional ALC raw material slurry injection device with a part cut away.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Formwork 2 Reinforcing reinforcing bar 3 Set mechanism 4 Mixer 5 Valve 6 Injection pipe 7 Vibrating sieve 8 Chute 9 Slurry injection port 10 Mount 11 Rail 12 Car 13 Staying box 14 Cylinder 15 Cylinder 16 Dividing plate 17 Vibrator 18 Slit 19 Eaves 20 Vibration Net basket 21 Buffer rubber 22 Vibrator

Continuation of front page (58) Field surveyed (Int. Cl. ⁶ , DB name) B28B 13/02 C04B 38/00 301 B28B 1/50

Claims (6)

(57) [Claims] 1. An apparatus for injecting ALC raw material slurry into a mold from above, comprising: a flow dividing plate having a skirt portion supported above the mold and inclined downward from a central portion to a peripheral portion; A cylindrical retention box supported above the central portion of the flow dividing plate so as to close the bottom while leaving a slit between the entire circumference of the lower end of the side wall, a vibrating mesh cage disposed inside the retention box, An injection apparatus for an ALC raw material slurry, comprising: a vibration generator attached to a mesh basket; and an injection pipe having a tip portion inserted inside the oscillation mesh basket and opening near the bottom surface. 2. The apparatus for injecting an ALC slurry raw material according to claim 1, wherein a vibration generator is attached to the flow dividing plate. 3. A flow plate is supported by a lifting device attached to a stay box so as to be movable in a vertical direction.
The apparatus for injecting an ALC raw material slurry according to claim 1 or 2. 4. A central portion of the flow dividing plate facing the bottom of the retaining box forms a plane, and an eave is projected outwardly from the entire periphery of the lower end of the side wall of the retaining box. Wherein a rectifying nozzle is formed in the nozzle.
The injection device for an ALC raw material slurry according to any one of the above. 5. The method according to claim 1, wherein the flow dividing plate, the retaining box, and the vibrating net cage are integrally provided so as to be movable in a vertical direction and / or a horizontal direction relative to the mold. 4
The injection device for an ALC raw material slurry according to any one of the above. 6. The injection of the ALC raw material slurry according to claim 5, wherein the peripheral edge of the lower end of the skirt portion of the flow dividing plate is formed non-linearly with respect to the direction of movement relative to the mold. apparatus.