Metal founding – Process – Shaping liquid metal against a forming surface
Patent
1981-11-19
1985-05-21
Lin, Kuang Y.
Metal founding
Process
Shaping liquid metal against a forming surface
164476, 164477, B22D 1112, B22D 11126
Patent
active
045180288
DESCRIPTION:
BRIEF SUMMARY
This invention concerns a process and apparatus for continuously obtaining by means of a blank of non-ferrous metal delivered from a continuous casting machine, blocks of constant section and having terminal projections from which stackable auto-clamping blocks may subsequently be formed.
The skilled worker knows that it is possible to produce by molds of suitable shape, blocks having parts recessed and/or in relief on one or more of their faces thereby to prevent relative displacement of the blocks, one with regard to the other, when they are assembled in stacks and thus made convenient for transport.
However, this technique involves discontinuous casting operations, block by block, leading to products which have a structure and composition somewhat heterogeneous, varying in weight and being subject to shrinkage on solidification.
For this reason the skilled worker to avoid these disadvantages, has sought to use continuously operating apparatus, notably in the case of blocks in the region of, or less than, a decimeter square, casting machines for casting on a ground wheel closed by a band. The continuous metal blank obtained at the exit of these machines are then divided into separate blocks either by being sawn off individually or, as in the case of French Pat. No. 1,224,969, by stamping followed by shearing.
However, each of these procedures possesses an important inconvenience. Thus, in shearing, besides the rapid wear of the shears, an appreciable amount of metal is spoilt in the chips which must be separated from the cutting lubricant during its recycling. In the procedure by stamping followed by shearing, it is necessary to have a die press, and moreover, the blocks obtained present a lengthwise expansion due to the crushing effect of the die; the result of which may be an irregular section and a variable space between them when they are aligned side by side and, consequently, they permit a relatively poor stack to be realized.
But a major disadvantage of these processes is that, in use, the resulting blocks do not comprise any means suitable to form an assemblage of blocks when they are stacked.
Applicant has searched and perfected a process and apparatus which, in accordance with the practice of this invention, permits continuous manufacture, without loss of metal, of blocks of constant section, presenting the necessary means for erecting stacks of auto-clamping blocks.
The process, according to the invention, consists in the continuous casting of a blank on a grooved wheel temporarily closed by a band and in delivering this blank periodically individually to an appliance for separating it into blocks, characterized by the fact that the blank is first pinched progressively on its lateral faces, in order to form impressions and the development of at least one raised portion on at least one of the other faces, then cut perpendicularly to the impressions.
Thus, the process utilizes, as primary material, a blank issuing from a machine for casting on a grooved wheel temporarily closed by a band to constitute a mold with moving walls.
The blank issuing from the casting machine is first brought back in a horizontal direction to be threaded between the cylinders of a straightener which gives it a suitable alignment, then it is engaged in the apparatus for cutting it into blocks.
This apparatus is mounted on a movable carriage which comprises means for fixing the blank. Thus, under the pressure of the cylinders of the straightener the blank moves the carriage along with it, and this enables the apparatus to move in synchronism with the blank and to carry out its separating action on one definite section thereof. In the course of this synchronous displacement the blank is first pinched progressively on its lateral faces by the apparatus so as to form depressions thereon and to develop at least one raised portion on at least one of the other faces.
These depressions are preferably symmetrical with respect to a vertical plane passing through the axis of the blank and they more or less conform to the slope of
REFERENCES:
patent: 3066401 (1962-12-01), Morel et al.
patent: 3365791 (1968-01-01), Olsson
patent: 3731512 (1973-05-01), Vogel et al.
patent: 3746071 (1973-07-01), Schey
patent: 3767178 (1973-10-01), Pfeuffer et al.
Aluminium Pechiney
Lin Kuang Y.
Seidel Richard K.
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