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US 2014/0319719 A1Published application
Moulding device and production process
AssigneeLafarge
InventorsLaurence JACQUES, Thibault LAGRANGE
Life of this patent
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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.
Claims6
A production process, comprising:
- 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.