Plastic and nonmetallic article shaping or treating: processes – Treatment of material by vibrating – jarring – or agitating... – Continuously formed or indefinite length article
Patent
1983-06-10
1986-03-04
Silbaugh, Jan
Plastic and nonmetallic article shaping or treating: processes
Treatment of material by vibrating, jarring, or agitating...
Continuously formed or indefinite length article
264 33, 264 71, 425429, 425432, 425456, B28B 108
Patent
active
045740640
DESCRIPTION:
BRIEF SUMMARY
The present invention is concerned with a method in continuous slide-casting of large-size concrete objects or corresponding elements for compacting the high-viscosity casting mix. The invention also comprises a slide-casting mould for carrying out the method, whereat the mould comprises a bottom plane, side walls of the mould, as well as means for bringing the high-viscosity casting mix mechanically under pressure.
In prior art, it is known to compact the concrete mix by vibration, or to bring the concrete mix in the mould mechanically under pressure by pressing one wall of the mould against the concrete mix. Thereat, in connection with the pressing action, the wall may additionally be varied between various angular positions. In prior art, it is also known to cast hollow slabs out of high-viscosity concrete mix by means of the slide-cast method. In such a case, the cavities of the hollow slab are formed by means of the slide-casting machine so that no thick wall strengths remain in the slab. It is the presence of the cavities that permits the compacting of the high-viscosity concrete mix in the said slide-cast method. On the contrary, in prior art it has not been possible to cast such massive concrete objects or elements whose smallest dimension is also at least tens, possibly even hundreds of millimeters, out of a high-viscosity concrete mix (water/cement ratio about 0.28 to 0.33).
It is an object of the present invention to permit slide-casting of large-size concrete objects or corresponding elements out of a high-viscosity concrete mix, and the method in accordance with the invention is mainly characterized in that repeated parallel dislocations back and forth are produced in the various regional zones of the mechanically pressurized high-viscosity casting mix present in the mould, and in particular in parallel dislocation planes of casting mix placed perpendicularly to the longitudinal direction of the casting base, by pivoting at least two opposite walls or wall portions of the slide-casting mould as synchronized and always in the same direction in relation to each other, which pivoting takes place around substantially vertical shafts placed at a distance from each other, included in the planes of the said mould walls, and being placed side by side in relation to the longitudinal direction of the casting base.
The slide-casting mould in accordance with the invention is mainly characterized in that before the parallel side walls at the outlet end of the slide-casting mould, within the casting line concerned, walls or wall portions are provided as fitted to each other or to their corresponding portions, provided as pairs, as pivotable always in the same direction around substantially vertical shafts included in their planes, whereat, by pivoting the said walls or wall portions, e.g. by means of cylinder-piston devices, repeated parallel dislocations back and forth can be produced in parallel displacement planes placed transversally to the longitudinal direction of the casting base in the casting mix present in the mould.
The invention comes out more specifically from the following description and from the attached drawings, wherein
FIG. 1 is a schematical presentation of the principle of the process of compacting of the concrete mix,
FIG. 2 illustrates the gliding of the thin lamellae or dislocation planes, placed one above the other, of the concrete object to be compared, in relation to each other in a cubic cast piece,
FIG. 3 is a schematical presentation of a casting mould as viewed from above,
FIG. 4 shows a section at A--A in FIG. 3,
FIGS. 5 to 7 show a slide-casting mould in accordance with the invention in its various operating positions as viewed from above,
FIG. 8 is a more detailed view of the slide-casting mould as viewed from above,
FIG. 9 shows a section at B--B in FIG. 8, and
FIG. 10 shows the mould of FIGS. 8 and 9 as a side view.
To begin with, the process of working of a high-viscosity concrete mix will be explained with reference to FIGS. 1 to 4.
In FIG. 1, it is assumed that the obj
REFERENCES:
patent: 2670515 (1954-03-01), Wigley
patent: 3497579 (1970-02-01), Barron
patent: 4253810 (1981-03-01), Bezhavov et al.
Lorin Hubert C.
Oy Partek Ab
Silbaugh Jan
LandOfFree
Method for continuous casting of objects out of a high-viscosity does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method for continuous casting of objects out of a high-viscosity, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method for continuous casting of objects out of a high-viscosity will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1594157