JPS6056083B2 - Method and apparatus for removing excess layer from cured lightweight concrete construction material - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION A device 6 for removing a surplus layer 4 from a building material 2 made of cured lightweight concrete comprises a front tool 9 having an edge 10 at a depth below the surface of the surplus layer 4. and a rear tool 1 having an edge 12 deeper than the surface.
1.

This allows the excess layer to be removed in two stages as the material 2 is fed through the device 6, ensuring a smooth and flat surface 18 on the final product. When manufacturing lightweight or aerated concrete construction materials, a slurry containing at least a siliceous material, a hydrated binder, a pore-forming agent and water is poured into a mold in which the slurry is expanded. It hardens into a semi-plastic, self-supporting molded body.

In order to mark the boundaries between the individual building materials, auxiliary cuts are made in the molded body using a cutting wire, after which the molded body is steam-cured under high pressure and temperature for final hardening. After steam curing, the compact is separated into individual pieces by means of a special machine which applies a combined rotational and displacement motion to the individual pieces of which it is composed. Depending on the dimensions of the material to be produced, the individual individual materials outside this molding may have a more or less extra layer thickness. The thickness of these extra layers is 55Tf! :1n or more, these can be removed by the above-mentioned separator. However, its thickness is 5577!117! In the following cases, it is necessary to manually scrape off this excess layer. This task is time consuming and, moreover, these excess layers are often stuck to the underlying building material, thus removing even the surface parts thereof and causing damage to the surface. If the surface of the lumber is damaged in this way, the lumber will be rejected or will require repair. The invention aims to eliminate the need to manually scrape off this excess layer and ensure a smooth, scratch-free surface on the underlying building material.

According to the invention, this is achieved by providing a relative movement between the building material in question and the processing equipment. This machining device comprises two separately installed tools, namely a front tool with at least one machining edge located at a depth from the top surface of the excess layer and a surface of the surface below the edge of the front tool. a rear tool having at least one machining edge deeper from the material; during said relative movement, two layers of the workpiece, i.e., a first layer, reduce its thickness to said layer; Determine the depth of the front tool edge below the surface of the second layer and its thickness below the front tool edge and! Remove what determines the depth difference between the edges of the rear tool. The thickness of the second partial layer is, for example, 5 to 15w!
By taking the range of n rather small, and at any time less than 25 TWi, no large amount of material is needed to remove this excess material from the lumber;
This substantially eliminates the risk of scratching off part of the uncoated surface of the material. The features of the processing device described above will become clearer in detail from the claims. A detailed description of embodiments of the invention, shown by way of example, will now be described with reference to the accompanying figures.

FIG. 1 is a perspective view showing a molded body of steam-cured lightweight concrete being passed through a processing device according to the invention. Figure 2
is a cross-sectional view of an enlarged portion of the molded body, and FIG. 3 is a cross-sectional view of the molded body and processing equipment shown in FIG. 1. The compact, indicated as a whole by 1 in the figure, comprises a plurality of individual pieces 2, each of which is scored by horizontal auxiliary cutting lines 3, which are subjected to steam curing. This was attached to the previous molded body.

Although these cutting lines have the effect of making a slit, they do not prevent the individual pieces from adhering rather strongly to each other, so that, as pointed out above, they must be mechanically separated from each other. . The uppermost individual piece 2 of the molded body has an excess layer 4 that must be removed.
In the processing apparatus of the invention, generally designated 6, the compact is moved in the direction of arrow 5 to process the excess layer. The device described above has a transport or working track for the shaped bodies 1, which track is shown as 7.

A frame 8 extends across the track 7 and supports two cutting or planing tools set at a distance. One of these two tools is a front tool 9 located at a height above the track 7 and having at least one working edge 10; at least one working edge 12 located slightly lower on the track than 10;
It is a rear tool 11 having a. In the illustrated embodiment, the first-mentioned tool 9 consists of a plurality of individual teeth or shafts 13, which are spaced apart from each other and each have an edge 10. In contrast, the rear tool 11 consists of one continuous rectangular blade. This blade is adjustably mounted on the frame and more specifically pivots around a joint 14, the pivoting movement of which is carried out by two piston-cylinder mechanisms, of the hydraulic type. things are appropriate. This allows the edge 12 of the blade to be aligned precisely in the same plane as the auxiliary cutting line 3 between the individual pieces 2 and the excess layer 4. As shown in FIG. 3, the blade 11 as well as the shaft 13 are arranged obliquely to the horizontal plane in which the layer 4 and the individual sections 2 are located in this case. More specifically, the blade and shaft are inclined about 45 degrees relative to this horizontal plane, although larger angles may also be used. In FIG. 2, 16 is the surplus layer 4, 17 towards which the edge 10 of the front tool 9 is directed.
Figure 3 illustrates the internal surface of the .

The apparatus described herein operates as follows. When the shaped body passes through the two tools 9, 11, two partial layers are removed from the excess layer. That is, the thickness of the first partial layer is
Depending on the depth of the edge 10 of the front tool below the surface 17 of the layer 4, the thickness T2 of the second partial layer is the depth between the edge 10 of the front tool and the edge 12 of the rear tool. Or it depends on the difference in level. Removal of this partial layer is carried out by grinding and/or scraping the material. In order to obtain a perfect and smooth surface 18 of the individual piece 2, the thickness T2 of the second partial layer is, as mentioned above, 25? It should be: Therefore, according to experimental tests, if the thickness T2 of this layer exceeds this value, due to the adhesion that occurs at the interface constituted by the cut 3, the second part is removed from the individual piece 2 itself to its material. There is a risk that it will be removed along with the layers. After passing through the device 6 shown in the figure, the individual pieces 2 stripped of the excess layer 4 are subjected to a grinding machine (not shown) and then, if possible, to a blotter.

The thus finished individual pieces may be further subjected to a device that applies a suitable hydrophobizing agent, such as a silane or polysiloxane, to the surface 18 thereof. Although only the molded body 1 including a plurality of individual pieces 2 is shown, normally only the individual pieces having the surplus layer 4 are processed by the processing device 6 among the individual pieces separated from the molded body. In order to process individual pieces of material of different thickness, not only the rear tool 11 but also the front tool 9 are adjusted vertically so that the face 16 towards which this tool is directed is located at a suitable height above the auxiliary cutting line 3. I'll do what I do. It is further noted that the device described here is suitable for use with or without cuts made by the auxiliary cutting line 3 in the individual pieces of material. Therefore, even if such a cut is lost, the rear tool 1
1 scrapes off the second partial layer while edges 10 and 12
A smooth surface 18 can be obtained even when the difference in level between the two is not very large. There are two types of tools mentioned here.
Three or more tools may be included in the device 6, but are not limited to three or more tools, which are located at successively different levels along the track 7. It is pointed out that these tools need not extend horizontally at all, but may be arranged at any angle to the plane. Example (1) Curing Before curing lightweight concrete construction materials by a known method, cuts are made along auxiliary cutting lines 3, thereby removing excess layer 4.

In this case, the edge 12 of the rear tool is set on the same plane as the above cut. (2) The difference in depth between the edge 10 of the front tool and the edge 12 of the rear tool is 25Tf0n or less.

(3) The front tool 9 has a plurality of teeth or shafts 13 which are spaced apart and juxtaposed in a line perpendicular to the direction of operation of the device. (4) The edge of the rear tool 11 is a single continuous blade. (5) The blades and/or teeth 11, 13 are tilted at 45 degrees with respect to the plane of the excess layer.

(6) At least the rear tool 11 is attached to the frame 8 in an adjustable manner, for example by a piston-cylinder, so that the edge of the tool can be adjusted to be in the same plane as the cut plane by the auxiliary cutting line 3.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing an embodiment of the invention, and FIGS. 2 and 3 are sectional views of the embodiment of the invention.

Claims (1)

[Claims] 1. An individual work piece 2 and two tools 9, 11 placed at a distance from each other, that is, at least one working edge 10 located below the surface of the excess layer. and a rear tool 11 having a working edge 12 with at least one single continuous blade located lower on the surface of the excess layer than the edge 10 of the front tool. Due to the relative movement between the two partial layers of the redundant layer of the individual material 2, the thickness t_1 is determined by the depth of the edge 10 of the front tool below the surface 17 of the redundant layer. The difference in depth between the first partial layer, the edge 10 of the front tool and the edge 12 of the rear tool is 25 mm or less,
A method for removing excess layers from cured concrete building materials, characterized in that a second partial layer of thickness t_2 determined by this difference is removed. 2 an individual piece 2 and two tools 9, 11 placed at a distance from each other, i.e. a front tool 9 with at least one working edge 10 located below the surface of the excess layer; , a rear tool 11 having a working edge 12 with at least one single continuous blade, located lower on the surface of the excess layer than the edge 10 of the front tool, between the individual pieces 2 Due to the relative movement, the two partial layers of the surplus layer of the individual material 2, i.e. the surface 17 of the surplus layer
The first partial layer of thickness t_1 determined by the depth of the edge 10 of the front tool at the bottom of Device for removing excess layers from cured concrete construction material, characterized in that it removes a second partial layer of thickness t_2 determined by the difference.