JPS6030242B2 - Compression molding method for concrete blocks - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a compression molding method for concrete blocks in which the output of a compression cylinder for compacting concrete blocks is performed in two stages to mold blocks of high quality and high capacity.

The compression cylinder used to harden and form the concrete blocks was a cylinder with a constant output.

Then, a fixed amount of hardened concrete material for immediate demolding is supplied to the molding machine, and the concrete block is compacted and formed by vibration and compression, but the mixing of this hardened concrete by the mixer at zero slump is extremely delicate and zero. What percentage of moisture is required in the slump? A moisture correction device is used to adjust the moisture content during kneading with a mixer, but it is difficult to accurately adjust the moisture content. Furthermore, moisture evaporation occurs during the mixing time in the mixing machine, so that the concrete material is normally supplied with a considerably different moisture content when it is supplied to the molding machine. Vertical compaction by vibrating and compressing this changed material depends on the material.
In the molding machine, various parts cannot operate smoothly, which naturally leads to poor quality phenomena related to cotton compaction and compression.

In other words, loose products were being molded. The present invention provides a molding method that can mold concrete materials with complex and subtle changes in slump into high-density blocks that meet standards through two-stage compression, with first low compression and second high compression. It is developed and provided based on many years of experience and achievements. Next, embodiments of the present invention will be described with reference to the accompanying drawings.
The figure shows a non-reversing formwork, and 1 is a mounting plate for attaching to a molding machine a cylinder of the present invention that performs a two-stage compression press operation and is structured in two stages in series.

2 is a low-power cylinder that operates at high speed in areas with low resistance to eliminate voids in the concrete by compressing and promoting movement.

3 is a high-power cylinder that pushes out the rear end of the rod of low-power cylinder 2 with high power, lowers the low-power cylinder rod, and presses the plate 10' at the upper end of the press plate 10, so that the press plate 10 defines the upper surface of the concrete. It is compressed into position to form a block of specified dimensions.

Reference numeral 4 indicates a pipe port for lowering the rod 6' of the low-power cylinder 6, and 4' indicates a pipe port for lowering the rod 7' of the piston 7 of the high-power cylinder.

Reference numeral 5 indicates a return pipe port for lifting the rod 6' of the piston 6 of the low-power cylinder, and reference numeral 5' indicates a return pipe port for lifting the rod 7' of the piston 7 of the high-power cylinder.

8 is a press-fit village that penetrates the inside of the material supply chute 9 and forms the formwork 1.
4. Press the material downward from the upper entrance.

In the press-in drive of this press-in village, when the density of the concrete material is coarse, the low-output cylinder 2 moves up and down at a high speed to dry and solidify the material in the formwork from above.

This low-power cylinder compression moves the material within the mold while compressing it to eliminate voids.
Reference numeral 9 is a movable material supply box for supplying a fixed amount of material to the formwork, and the lower part is formed to the size that the formwork closes, and the upper part is larger than the lower part to form a tapered material supply box.

10 is a press plate device which fixes a press plate shaft bolt to the front end of the chute 9.

Reference numeral 10' denotes a plate that presses the press plate fixed above the press plate 10, and is pressed by the lowering of the press-in village 8.

Reference numeral 11 is a spring installed around the outer periphery of the press plate, which performs firming and mold release when the press plate is raised and compressed, instantaneously but with a certain amount of time.

Reference numeral 12 denotes a lower closing plate of a hopper 22 that stores the thickened material, and is fixed to the upper rear of the quantitative material supply box 9.

13 is a cylinder that advances and retreats the material supply box; 14 is a split formwork or an integrated form; in the case of a split formwork, the formwork opens and closes from side to side to demold and take out the product block; In this case, the molded product is demolded by punching out the bottom.

Reference numeral 15 denotes a pallet vibrating table for stacking pallets, and a vibrator 16 is installed below to vibrate the pallet and concrete from below during molding.

Reference numeral 17 denotes a pallet, which is placed on a pallet vibrating table 15.

FIG. 2 shows an embodiment of a mold in which the mold 14 is reversed as indicated by arrow A to perform molding and demolding, and the mechanism for compressing into two stages is all the same as in the embodiment shown in FIG. Reference numeral 18 indicates a guide shaft for moving the press plate up and down, and reference numeral 19 indicates a lower closing plate of the storage hopper 22.

2. Rotate as shown by arrow A on the formwork reversal axis.

21 is a receiving mold.

, Next, the method of the present invention will be explained according to an example.Formwork 1
A fixed quantity supply box 9 is placed at the upper entrance of the cylinder 4 by the advance of the cylinder 13. A fixed amount of concrete material is dropped into the material supply box 9 from a hopper 22, and the lower opening of the hopper is closed by a closing plate fixed to the upper end of the material supply box. At the same time as the material feeding box 9 advances into the opening of the formwork 14, the vibrating pallet holder 15
The vibrator 16 installed below starts and directly vibrates the material fed into the formwork via the surface pallet 17 from below, while the pipe port 4 of the low-power cylinder 2 is moved.
The forward piping ports 4' of the high-output cylinder 3 are connected, and the respective return piping ports 5, 5' are connected to move the rods 6', 7' of the low-output cylinder and the high-output cylinder up and down. Therefore, the lowering and raising of the rods of the low-power and high-power cylinders operate in synchrony and in the same direction.

A press-fitting punch 8 is in close contact with the lower part of this low-output cylinder rod 6', which penetrates the inside of the material supply box 9 and press-fits the material in the material supply box into the formwork from above, filling it into a pigeon-hardening cylinder rod. 6' and 7' are raised by the cylinders 2 and 3, and the material supply box 9 is retreated by the cylinder 13 and returned to its original position.At the same time, the press plate 10 fixed in front of the material supply box is moved to the upper closing part of the formwork. After being repositioned, the low output cylinder and the high output cylinder descend again to press the upper plate 10' of the press slope with secondary compression from the high output cylinder, completing compression compaction to a specified size. Then, the cylinders 2 and 3 are activated to raise the punch and remove the product block from the mold as before.This process is repeated to perform compaction and compaction, and during this process, the material is supplied. The vibrator is activated from the time until the end of compression. Next, to explain the operation sequence of the reversible formwork device shown in FIG. 2, the formwork device 14 is reversed and material is fed,
The demolding process is the same as the two-stage compression process, except that the inverted molded block is demolded downward, and the press plate has a large area and this wide area is compressed and compacted.

As mentioned above, during one-stage compression using a low-power cylinder, even if the concrete is pressed, it is vibrated and moved, eliminating voids, and the pressure is automatically switched from the low-power cylinder to the high-power cylinder. Compression compaction is performed to specified dimensions.

In this way, the operation of the low-power cylinder is fast,
The compression of the high-output cylinder is slow, and the compression force and speed can be switched in two stages to form concrete material with complex moisture content into a specified size and pass it through an automatic molding machine to achieve high density quality.

It goes without saying that this two-stage compression - B concrete block forming method is not limited to the illustrated embodiment, and the same effect can be obtained even if other two-stage output devices are used to form the concrete block.

As described above, when using the molding method of the present invention, cloud slump materials such as insufficient moisture fine adjustment during mixer kneading and moisture evaporation during kneading time can be improved by molding by changing the compression force in two stages. This method has the excellent effect of forming high-quality concrete blocks.

[Brief explanation of drawings]

FIG. 1 is a front sectional view of the essential parts of a two-stage compression device provided in a non-reversing type formwork apparatus, and FIG. 2 is a front view of the essential parts of a two-stage compression apparatus provided in a reversible formwork apparatus. 2...Low output cylinder, 3...High output cylinder, 8...Press-in village, 14...Formwork. Figure 1 Figure 2

Claims (1)

[Claims] 1 As a compression molding mechanism for concrete blocks, a low-power cylinder with a fast operating speed is provided directly above the formwork, and in conjunction with this cylinder, high-power cylinders with a slow operating speed are arranged in two stages in series, and the lower low-power cylinder A press plate is placed at the tip of the rod, and the concrete is moved and homogenized within the formwork in a short time by pressing with a low-power cylinder, and then the high-power cylinder is activated to perform strong compaction. This compression molding method for concrete blocks is characterized in that the concrete block is formed by applying vibration until the end of the pressing process.