EP 0294267 A1 19881207 - Method for separating a piece of predetermined shape from a block of material, for example a rock.
Title (en)
Method for separating a piece of predetermined shape from a block of material, for example a rock.
Title (de)
Verfahren zum Separieren eines Stücks eines Materialblockes von im voraus bestimmter Form, zum Beispiel eines Steines.
Title (fr)
Procédé pour séparer un morceau de forme déterminée d'avance d'un bloc de matière, par exemple une roche.
Publication
Application
Priority
FR 8707275 A 19870520
Abstract (en)
The invention relates to a method for separating a piece of predetermined shape, for example a relatively thin plate, from a block, in particular of rock, without removing material. Starting from a cleft (3), a fissure is propagated, for example with the aid of fluid pressure, which separates the lips of the fissure. To guide the fissure, on the one hand a compensation force (C) is exerted on the part of the block which it is desired to transform into pieces, in the zone from which the fissure develops, and on the other hand zones of less resistance are created at certain points of the surface of desired separation, over all or part of the circumference of the piece at least, possibly even on the inside of the block. It is thus possible to obtain, for example, split plates of granite thirty to fifty centimetres high and three centimetres thick, or even split pieces in the shape of a U or L. <IMAGE>
IPC 1-7
IPC 8 full level
B28D 1/00 (2006.01); B28D 1/22 (2006.01); B28D 7/04 (2006.01)
CPC (source: EP)
B28D 1/00 (2013.01); B28D 1/222 (2013.01); B28D 7/04 (2013.01)
Citation (search report)
- [A] DE 1427759 A1 19690123 - SKANDINAVISKA GRANIT AKTIEBOLA
- [A] US 2319154 A 19430511 - ORLOW ERNEST M
- [A] FR 2223968 A5 19741025 - LE BESCHU ROGER [FR]
- [A] DE 2522521 A1 19751204 - JUUL HANS
- [A] US 2723657 A 19551115 - JONES IVO L
- [A] US 2593606 A 19520422 - PRICE MILTON R
- [A] US 3809049 A 19740507 - FLETCHER R, et al
Designated contracting state (EPC)
AT BE CH DE ES FR GB GR IT LI LU NL SE
DOCDB simple family (publication)
EP 0294267 A1 19881207; EP 0294267 B1 19940810; AT E109713 T1 19940815; DE 3851008 D1 19940915; FR 2615440 A1 19881125; FR 2615440 B1 19891006
DOCDB simple family (application)
EP 88401239 A 19880520; AT 88401239 T 19880520; DE 3851008 T 19880520; FR 8707275 A 19870520