JPH0579204B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a method of manufacturing a concrete block having a bulge on the side surface.

[Prior Art] Concrete blocks having bulges on their sides have long been in strong demand from customers because of the aesthetic appearance and sense of stability caused by the bulges on the sides.

Various methods described below are known for manufacturing concrete blocks having bulges on their side surfaces.

Namely, (1) A method in which a flat molded surface is cut using a cutting tool after the concrete has hardened and dried to create a bulge on the side surface.

(2) A method of making the fracture surface of a split block (fracture block) mid-height.
(Special Publication No. 57-1085, Special Publication No. 57-31963) (3) Using concrete that is relatively soft and can be kneaded and slumped, blocks are molded using the immediate demolding method, and immediately after demolding, the blocks are slumped under pressure in the vertical direction. A method of making the sides bulge out to a medium height.

etc.

[Problems to be Solved by the Invention] Among the conventional methods described above, the cutting method (1) wastes the scraped concrete and requires dust collection due to the generation of dust during processing. equipment costs and operating costs will increase.

In addition, method (2) requires breaking to create a medium-high surface, so many parts are discarded as fragments, which must be disposed of, and equipment and operating costs for the split machine are high. . This split block has many other drawbacks, such as an unavoidable high defect rate.

In addition, in method (3), highly technical conditions must be satisfied in order to mold a block that can be slumped appropriately using an immediate demolding method.

In other words, it satisfies the delicate conditions of maintaining its form through immediate demolding, undergoing appropriate plastic deformation without causing destruction or cracking when pressurized, and retaining its form after pressurization is finished. There must be.

Furthermore, in this method, the core that makes up the cavity is pulled out during demolding, so negative pressure is generated in this area, creating a recess on the side surface. Immediately after that, applying pressure from above and below will further exaggerate this recess. This tends to spoil the appearance of the product, which should originally have an outwardly convex shape.

[Means for Solving the Problems] The present invention solves the above-mentioned drawbacks of the manufacturing method of a concrete block having a bulge on the side surface, and relates to a method for manufacturing the concrete block at low cost and easily, and includes a method for molding a concrete block having a bulge on the side surface. a frame member for forming a side surface including the maximum bulging portion of the side surface of the block and above the maximum bulging portion;
A fixed mold that opens vertically and is configured by a frame member for forming the front and rear surfaces of the block is supported by a pedestal, and a movable mold for forming the side surface below the maximum bulge portion is movable. After being held movably in the vertical direction by the mold holder and inserted into the lower side of the fixed mold, the pallet mounting table is raised and the lower opening of the fixed mold is opened with the pallet placed on the pallet mounting table. At the same time, the movable mold is engaged with the fixed mold and tightened by slightly lifting the fixed mold from the pedestal, and then, while applying vibration to the fixed mold, concrete is poured from the upper opening of the fixed mold. supply materials,
After that, the concrete material in the mold is pressed through the upper opening of the fixed mold with vibration,
After molding, the movable mold is pulled out and separated from the fixed mold, the block is sandwiched between the pallet and the press mold, the pallet mounting table and the press mold are lowered, the mold is removed, and the concrete is taken out below the fixed mold. This is a method for manufacturing blocks.

[Examples and Effects] Examples and effects of the method of the present invention will be described in detail below with reference to the accompanying drawings.

A concrete block having a bulge on the side surface to which the method of the present invention is applied is one in which, as illustrated in FIG. The interior has vertically penetrating cavities 3, 3, 3, and vertical notches 4 on the front and rear surfaces.
4. However, this cavity 3, 3,
3 and notch strips 4, 4 may be omitted.

This block 1 is a fixed type 10 with openings at the top and bottom.
and a movable type insertion mechanism 1 comprising a movable type 11 that can move in and out of the fixed type 10 from one side thereof.
2. Disposed on the other side of the fixed mold 10, the fixed mold 10
A material feeding mechanism 13 that reciprocates horizontally on the upper surface, a pressing die 14 that is placed above the fixed mold 10 and moves up and down and fits into the fixed mold 10 by lowering, and the fixed mold 1
0, a pallet 15 that moves up and down and closes the lower surface of the fixed mold 10 as it rises, and in this embodiment, further includes cores 22, 22, 22 for forming the cavities 3, 3, 3. It is molded using a molding device consisting of:

As is particularly clear in FIG. 2, the fixed mold 10 in this device consists of a pair of opposing frame members 10 for forming the bulging side surfaces of the block 1.
A, 10a, and a pair of opposing frame members 10b, 10b for forming the front and rear surfaces of the block form a four-periphery frame, and the frame members 10a, 10a are located above the maximum bulging portion of the side surface of the block. It has an inner surface for forming the side surfaces of.

Further, the frame members 10b, 10b are provided with protruding strips for forming the cutout strips 4, 4.

The movable mold insertion mechanism 12 inserts the movable mold 11 into the fixed mold 1.
The movable mold holding part 16 that holds the movable mold 11 so that it can be moved a minute distance in the vertical direction, and the movable mold holding part 16 is fixedly equipped. frame 1
7, and a fluid cylinder 18 for moving the frame 17 forward and backward.

The material feeding mechanism 13 consists of a flat plate 19 installed adjacent to the fixed mold 10, a frame portion 20 that reciprocates between two positions, directly above the fixed frame 10, and a fluid cylinder 21 that drives the frame portion. 20 is on the flat plate, receives concrete material from the upper opening,
Next, when the frame part 20 is moved and the frame part 20 is positioned directly above the fixed mold 10, the lower opening of the frame part 20 and the upper opening of the fixed mold 10 communicate with each other, and the concrete material is poured into the fixed mold 10. It is becoming more and more popular.

A pallet mounting table 24 is disposed below the pallet 15 with a vibration-proof rubber 23 interposed therebetween. Note that 25 is a pedestal for the fixed mold 10.

A concrete block having a bulge on the side surface can be manufactured using this device using the following steps.

(1) First, insert the movable mold 11 into the fixed mold 10.
(See Figures 3 and 4) In this step, the engaging part of the movable mold 11 in the fixed mold 10 and the movable mold 11 are connected to each other.
There is a slight gap between and, and the presence of this gap allows the movable die 11 to be inserted into the fixed die 10 smoothly.

(2) Next, pallet mounting table 2 on which pallet 15 is placed
4 upward and move the movable mold 11 to pallet 1.
5 and the engaging part of the fixed mold 10, press the pallet 15 against the lower end of the fixed mold 10, close the bottom of the fixed mold 10, and raise the pallet mounting table 24 to remove the fixed mold 10. cradle 2
Raise it a little distance from 5. (See Figures 4 and 5.) As a result, the movable mold 11 is clamped and tightened between the pallet 15 and the engaging part of the fixed mold 10, and at this time, the movable mold 11 is moved upward within the movable mold holding part 16 by a minute distance. Move to. (See FIG. 5) (3) Next, concrete material is supplied into the fixed mold 10, and this supply is performed by the above-mentioned action of the material supply mechanism 13.

During this time, vibrations are applied to the fixed mold 10 by means not shown. Even if this vibration is applied, the fixed mold 10 is not in contact with the pedestal 25 and is supported by the vibration isolating rubber 23 via the pallet 15. The vibrations are not inhibited by the vibrations, and the vibrations are not transmitted to other parts. Also,
Since the movable mold 11 is held by the movable mold holder 16 so as to be movable in the vertical direction, when the movable mold 11 vibrates together with the fixed mold 10 while being held tightly between the fixed mold 10 and the pallet 15, The vibration of the fixed mold 10 is not hindered.

(4) After this, the concrete material in the fixed mold 10 is pressed from above by the pressing mold 14. During this time, vibrations are applied to the fixed mold 10 as in the previous step, and concrete is pressurized and filled.
(See Figure 6) (5) When this pressurized filling is completed, the vibration of the fixed mold 10 is stopped, and then the movable mold 11 is pulled out from the fixed mold 10). (See Figure 7) (6) When the thus formed block is held between the pallet and the press die and the pallet mounting table and the press die are simultaneously lowered at the same speed, the stationary die 10 is first supported by the pedestal. The block is then demolded and taken out from below the fixed mold 10.

[Effects of the Invention] According to the method of the present invention as detailed above, 1. Since the material is molded into a bulged shape, there is no part that is discarded during secondary processing such as cutting, and the material is There is no waste. Furthermore, there are no problems with waste disposal or dust disposal.

2. No defective products occur due to secondary processing.

3. If the method of the present invention is applied to molding a slump block, the slump block is already molded to have an outwardly convex shape, so when pressure is applied from above and below, the sidewalls will always bulge outwards. , has the advantage of improving quality.

4. The process of manufacturing concrete blocks involves inserting the movable mold into the fixed mold and pulling it out from the fixed mold, but these steps are accomplished by the simple forward and backward movement of a fluid cylinder. Therefore, insertion and extraction can be performed in a short time, making it extremely efficient.

This method has advantages such as low defect rate and high efficiency, making it an economically superior method.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of a concrete block having a bulge on the side surface to which the method of the present invention is applied, Fig. 2 is a perspective view of essential parts showing an example of a molding device used in the method of the present invention, and Figs. FIG. 7 is an explanatory diagram showing the steps of the method of the present invention. 1... Concrete block body, 2... Side wall, 3
...Cavity, 4...Notch line, 10...Fixed type, 11...Movable type, 12...Movable type insertion mechanism, 13...Material feeding mechanism, 1
4... Press mold, 15... Palette, 22... Core.

Claims (1)

[Claims] 1. In the molding of a concrete block having a bulge on the side surface, a frame member for forming the side surface including the maximum bulge part of the side surface and above the maximum bulge part, and a frame member for forming the front and rear surfaces of the block. A fixed mold that opens vertically and is configured by a frame member is supported by a pedestal, and a movable mold for forming the side surface below the maximum bulging part is supported in the vertical direction by a movable mold holding part. After holding the pallet movably and inserting it under the fixed mold, the pallet mounting table is raised and the lower opening of the fixed mold is closed with the pallet placed on the pallet mounting table, and the fixed mold is placed on the cradle. The movable mold is engaged with the fixed mold and tightened by raising it slightly from above, and then the fixed mold is vibrated and concrete material is supplied from the upper opening of the fixed mold, and then the fixed mold is The concrete material in the mold is vibrated and pressed through the upper opening of the mold, and after forming, the movable mold is pulled out and separated from the fixed mold, and the block is sandwiched between the pallet and the mold. A method for manufacturing a concrete block characterized by lowering a pallet mounting table and a pressing mold to remove the mold and taking it out below a fixed mold.