Back to results
US 2012/0056348 A1Published application
Moulding device and production process
AssigneeLafarge
InventorsLaurence Jacques, Thibault Lagrange
Life of this patent
Estimating the term…
Abstract
A production process includes introducing the material to be moulded into a mould, placing the mould in an envelope comprising a vacuum port; creating a low pressure in the envelope by formation of a gas flow through the vacuum port; deforming the mould; stopping the gas flow; and applying pressure on at least a portion of the mould, optionally with interposition of the envelope, at least after the gas flow is stopped.
Claims14
A moulding device comprising:
- an envelope;
- a mould, the mould being in the envelope, the mould comprising a bottom shell and a top shell on the bottom shell closing the mould, the mould being configured to receive concrete, the concrete being confined in the mould;
- a vacuum port configured to let a gas flow escape in order to create a low pressure in the envelope;
- an obturating element configured to interrupt said gas flow after the low pressure is created;
- a deforming member of the mould located beneath the mould, the mould lying horizontally when the deforming member is not deforming the mould;
- and
- a pressure module, different from the envelope and the deforming member, configured to exert pressure on at least a portion of the mould, optionally with interposition of the envelope, once the low pressure is created.
4 more elements
A production process, comprising the following steps:
- introducing a concrete into a mould, the mould comprising a bottom shell and a top shell on the bottom shell closing the mould, the concrete being confined in the mould;
- placing the mould in an envelope comprising a vacuum port;
- creating a low pressure in the envelope formed by a gas flow passing through the vacuum port;
- deforming the mould by a deforming member located beneath the mould, the mould lying horizontally when the deforming member is not deforming the mould;
- stopping the gas flow;
- and
- applying pressure, by a pressure module different from the envelope and the deforming member, on at least a portion of the mould, optionally with interposition of the envelope, at least after the gas flow has stopped.
4 more elements
Dependencies are inferred from the claim text.