JPS5818884B2 - Method and device for forming a mortar layer that serves as the decorative surface of a concrete block - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION This invention differs from conventional concrete block molding in that the mortar layer that becomes the decorative surface of the block is
A non-flowing mortar layer of uniform thickness is molded in advance and fed into a block molding machine together with a pallet, and then concrete is poured and molded, resulting in a decorative surface that is as dense and beautiful as mortar is, with no defects at all. The purpose is to economically mold blocks of

Incidentally, to explain the embodiment with reference to the drawings, 1 is a mortar mixer, and a bearing 2 is fixed to the center of its upper plate. An attached axle element 6 is inserted, and a cylinder 8 is fixed to the axle element 6 at the center of the bottom plate 7 of the mixer 1.

A shaft rod 11 having a drum-shaped metering valve 9 attached thereto so as to be adjustable by a ring 10 is loosely inserted into the cylinder 8 so as to be able to move up and down.
It is connected to cylinder 13°13 by screwing.

Reference numeral 13' denotes a stroke adjustment bolt for increasing or decreasing mortar, and directly below the cylinder 8, a receiving die 17 having an open cylinder 15 and a template 16 on its lower edge is fixed to the body frame 18 via a buffer 14.14.

Below the receiving mold 17, a conveyor 19 for loading the pallet P in the direction of the arrow ■ is installed horizontally, and directly below the pallet P in its fixed position is a vibration plate 21 equipped with a vibrator 20 and a shock absorber 22. It is connected to the acquisition cylinder 23 via 22.

Reference numeral 24 denotes an air injection hole provided above the cylinder 8, which injects air only when mortar is being supplied to promote the mortar to flow down.

25 is an air vent hole drilled in the template 16; 26 is an injection device for spraying a release agent onto the pallets I-P' that are sequentially fed; 27; 27 is a conveyor wheel; 28 is a belt preparator;
' is a belt, 29 is its motor, 30 is a positioning guide plate when feeding the pallet onto the conveyor, 31 is a roller conveyor that feeds the pallet to the block molding machine together with the molded mortar layer, and g is the receiving mold 17. A gap is created when the template 16 and the pallet P are fitted, m is mortar, and M is a mortar layer.

Next, FIG. 4 shows the case where the bottom surface of the pallet I-P is flat, and FIGS. 5 and 6 show the case where the center part of the pallet P is concave. A core 32 having pores 34 perforated in the lower surface opposite to the concave shape is suspended from an open tube 15 by several narrow rods 33.

Of course, the symbols are common, and it is obvious that the shape of the pallet P and the decorative surface of the block are symmetrical.

Since this method and the embodiment device using this method are based on paper, first, the metering valve 9 of the shaft rod 11 is raised by the (upper) cylinders 13, 13 as shown in FIG. The cylinder 8 is closed, and the mortar m of the mixer 1 is passed from the motor 3 to the preform 4 and the shaft element 6, and the blades 5 are constantly rotated slowly to continue stirring.

On the other hand, the pallets to which the release agent was sprayed are conveyor belt 1.
9, it moves to the right in the direction of the arrow ■ and stops when it reaches the fixed position.
The cylinder 23 operates to raise the diaphragm 21 and
picks up the pallet P from the conveyor 19 as shown by the phantom line in FIG. 1 (lower part).

The template plate 16 of the receiving mold 17 and the pallet l-P fit together at their outer peripheral edges to form a gap g.

. Here, as shown in FIG. 1, when the shaft rods 1j,j descend, the mortar m measured by the volume of the hourglass-shaped metering valve 9 passes through the cylinder 8 and falls from the open tube 15 of the receiving mold 17 below and is supplied to the pallet P. When the supply is completed, the valve 9 rises and returns to its original position, completely closing the cylinder 8.

This hourglass-shaped metering valve 9 has an hourglass-shaped longitudinal section as shown in the figure, and the mortar swells in the small narrow area formed by the upper and lower molds, quantifying the amount of mortar to be supplied to the pallet. The shape of the cross section (not shown) is usually circular or square to facilitate feeding onto rectangular pallets.

At the same time as this mortar is supplied, the vibrator 20 is started to apply vibration to the pallet P, and the mortar m on the pallet is withdrawn and stacked in the gap g and the center surface of the pallet P to an even thickness as shown in FIG. A desired non-flowable mortar layer M is molded in this manner.

Then, the operation of the vibrator is stopped, and the pallet P is detached from the mold plate 16 and lowered, and the mortar layer M and the belt conveyor 1 are conveyed to each other.
9, it moves to the right, is transferred to the roller conveyor 31, and is sent to the block molding machine.

This rightward movement sends the pallet P on the next conveyor to the mortar supplying position and stops.

The pressure at the time of downward supply is released through the small hole 24' of the metering valve 9, and the
Air is injected from the air injection hole of the ring 10, which helps in dropping a fixed amount of mortar, and the number of rings 10 is increased or decreased as necessary.

The pores 25 in the template 16 relieve pressure and facilitate mortar withdrawal.

Moreover, since the shaft rod 11 does not come into contact with the stirring blade 5 due to the shaft element 6, there is no mutual influence, allowing gentle stirring and maintaining favorable mortar conditions at all times. It has the effect of making the opening and closing of 9 precise with instantaneous operation and causing no disturbance to the metering amount.

Conventionally, mortar was placed on a pallet and spread by hand using vibrations, so the thickness was uneven; it was thicker in the lower parts and thinner in the higher parts.Concrete was poured into the mortar layer and the block was broken by vibration and compression. However, the decorative surface of this block exposed the difference in specific gravity between the mortar and the silicon aggregate like pebbles, and the uneven shape of the pallet surface caused irregular flow, causing extreme When it becomes a block, aggregate particles are exposed on the decorative surface of the block, resulting in a significant deterioration in quality. There was a big drawback.

This phenomenon is especially true for reversible block molding machines! It was a happy dog.

However, as described above, in this invention, a fixed amount of quiltar is supplied to a pallet to form a non-flowable, uniformly thick mortar layer M, and then the pallet with the mortar layer M deposited thereon is sent to a block molding machine. This is an epoch-making process that corresponds to the preliminary stage of forming blocks as Fuhiro did.
It completely eliminates the drawbacks of the conventional technology and can be used in all types of block molding machines.

According to this invention, even when strong vibrations are applied during block molding, there is no flow or irregular movement as in the conventional method, and the material penetrates evenly into the material, as stated in the purpose at the beginning. It has the effect of molding a block with a beautiful decorative surface without any defects.

Furthermore, not only is there no loss of mortar, but molding into a uniform layer also has an extremely large economical advantage in that it can save money.

In particular, the functions of each part of this device work together rationally and smoothly and operate automatically and in time, making it easy to mold and demold blocks, and further improving quality. Together, they are the embodiment of technology based on highly inventive ideas and have great economic effects.

[Brief explanation of drawings]

The attached drawings show an embodiment of the present method and an apparatus using the present method, and FIG. 1 is a front view with one part cut away, FIG. 2 is a side view of the same, and FIG. 3 is a one-part cutaway view. Enlarged cross-sectional front view, No. 4
5 is an enlarged sectional view of another pallet, and FIG. 6 is a plan view of FIG. 5.

Claims (1)

[Claims] 1. A cylinder is fixed to the center of the bottom of the mortar mixer, and a drum-shaped piston valve that moves up and down inside the cylinder supplies a fixed amount of mortar from the mixer to the pallet via the receiving mold, and then the pallet is vibrated. A mortar that serves as a decorative surface of a concrete block, characterized in that mortar is applied to the gap created by fitting the receiving mold and the pallet and to the center surface of the pallet to obtain a mortar layer of approximately uniform thickness. Layer 2 An air injection hole is provided at the upper end of a cylinder that is opened at the bottom of the mortar mixer, and air is injected from the injection hole to forcefully drop the mortar, as set forth in claim 1. A method for forming mortar layers that serve as the decorative surface of concrete blocks. 3 A vertical shaft with a drum-shaped metering valve that moves up and down between the mortar stirring mantle shaft and the inside of the cylinder fixed to the center of the bottom of the mortar mixer is provided in conjunction with the cylinder, and an opening and a template are provided directly below the cylinder. A concrete block construction consisting of a beam receiving mold fixed to the machine frame, a conveyor for loading pallets placed horizontally just below the receiving mold, and a pallet lifting cylinder equipped with a vibrator installed below the conveyor. A molding device for the mortar layer that becomes the decorative surface. 4. The apparatus for molding a mortar layer serving as a decorative surface of a concrete block according to claim 3, characterized in that an air injection hole is provided in the upper part of the cylinder provided at the lower part of the mortar mixer.