Metal working – Plural diverse manufacturing apparatus including means for... – Binding or covering and cutting
Patent
1996-03-14
1997-07-15
Briggs, William R.
Metal working
Plural diverse manufacturing apparatus including means for...
Binding or covering and cutting
140112, 219 56, 2281735, B23P 2100, B23K 1111, B21F 2710, B21F 1508
Patent
active
056471106
DESCRIPTION:
BRIEF SUMMARY
The invention relates to a plant for the continuous production of building elements which consist of two parallel flat grid meshes made from intersecting longitudinal and transverse wires welded to one another at the intersection points, of straight web wires holding the grid meshes at a predetermined mutual spacing and of an insulating body which is arranged between the grid meshes and through which the web wires penetrate, with a production channel, with two supply reels, arranged on both sides of the production channel, and downstream straightening devices, each for a grid sheet, with two curved lead devices opening tangentially on opposite longitudinal sides of the production channel, with an insulating-body guide device arranged between the two lead devices, with at least one group, arranged laterally of the production channel, of web-wire supply reels and web-wire feeding and cutting devices, with web-wire welding devices which are arranged on both sides of the production channel and which have a transformer and flexible electrical leads from the secondary outputs of the transformer to jaws of welding tongs pivotable into the grid-mesh planes, and with web-wire trimming devices, each for severing a projecting length of web wire.
A plant of this generic type is known from Austrian Patent Specification 372,868. In this plant, first of all, two grid sheets are brought into a parallel position at a mutual spacing corresponding to the desired thickness of the building element to be produced. An insulating board is inserted into the interspace between the grid sheets and with a spacing from each grid sheet. A plurality of web wires are guided in vertical rows one above the other from the side, from wire-supply reels, through one of the two grid sheets into the interspace between the grid sheets and through the insulating board, in such a way that each web wire comes to rest with each of its ends near one grid wire of the two grid sheets. The front ends of the web wires are welded to the corresponding grid wires of the one grid sheet and the web wires are severed from the wire supply. In a subsequent work step, in a further web-wire welding device the severed ends of the web wires are welded to the corresponding grid wires of the other grid sheet.
The welding devices used in the known plant consist essentially of a transformer, of flexible electrical leads, connecting the secondary outputs of the transformer to electrode holders and of electrodes. The electrode holders form jaws of welding tongs and are pivotable into the grid-mesh plane. In a subsequent work step, the laterally protruding projecting lengths of the web-wire ends are severed by the pivotably mounted trimming shears. One jaw of each trimming shear serves as an abutment for a grid wire of the grid meshes of the element, whilst the other jaw of each trimming shear acts as a knife which shears off the projecting length of web wire in each case in the direction of the grid wire retained by the jaw. Finally, building elements of appropriate length are separated.
A disadvantage of the known plant is that only a joint change of the shoot-in angles of the two rows of web wires is possible, and that an additional welding station is necessary in the case of large spacings between adjacent rows of web wires in the shoot-in region of the web wires. Another disadvantage is that work is carried out with individual independent electrode holders and that a particular trimming shear is required for each projecting length of web wire, whilst all the electrode holders and all the trimming shears have to be activated separately. A further disadvantage is, finally, that the cutting devices for severing the grid sheets of the already finished building element involve an extremely high outlay.
The object of the invention is to provide a plant of a type specified in the introduction, which avoids the disadvantages of the known plant and which, moreover, makes it possible, in a continuous production operation, to produce building elements with different arrangements
REFERENCES:
patent: 4372350 (1983-02-01), Schmidt et al.
patent: 5053597 (1991-10-01), Ritter et al.
patent: 5102027 (1992-04-01), Se Hong
patent: 5113915 (1992-05-01), Ritter et al.
patent: 5403985 (1995-04-01), Ahn
patent: 5446254 (1995-08-01), Ritter et al.
Ritter Gerhard
Ritter Klaus
Schmidt Gerhard
Briggs William R.
EVG Entwicklungs- u. Verwertungs- Gesellschaft mbH
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