FR2665101A1 - Method, and means of implementation, for casting elements of interior or exterior decoration having the appearance of marble - Google Patents

Abstract

A method for casting plaster-based elements of interior or exterior decoration in a mould and a device for implementing the method. The method consists in: step 1) tempering the plaster under vacuum to outgas it, step 2) allowing at least two fluxes (A, B) of the tempered and outgassed plaster to flow over a slightly inclined surface (5), at least one of the fluxes being heavily loaded with dye while the other flux is without dye, step 3) causing the fluxes to interpenetrate during their flow over the inclined surface leading to a heterogeneous mixture of fluxes, step 4) dividing (plate 4) the heterogeneous mixture into several fluxes, step 5) reassembling (outlet 3) these latter fluxes into a single flux in order to pour it into the mould (8).

Description

 The present invention is in the field of manufacturing interior or exterior decorative elements based on plaster or the like, such as mantels for fireplaces, columns, balustrades, etc. and relates to a process for molding in mold such elements and its implementation device.

 The object of the present invention is to give the appearance of marble to these decorative elements based on plaster, while allowing the manufacture of small series at low cost.

 According to the present invention, a process for molding in the interior plaster-based interior decoration elements consists of mixing plaster under vacuum to degas it, letting at least two streams of tempered plaster flow on a slightly inclined surface. at least is the degassed plaster, the other of which is strongly tinted, while the first is without dye, causing during their casting on the inclined surface an interpenetration of these fluxes to obtain a most heterogeneous mixture, then dividing this mixture heterogeneous in several flows which will be poured in a single flow in a mold. Very advantageously, this division of the heterogeneous mixture of tinted and non-tinted plaster, will simulate in the molded mass, the veining of a marble.

The present invention will be better understood and details will be apparent from the description which will be given of a particular simplified form, of embodiment of the invention in relation to the figures of the single sheet appended, in which
- Fig.l is a perspective of the device for implementing said process,
- Fig.2 is a longitudinal section of the same device.

 In FIGS. 1 and 2, it appears that a device for implementing the said molding process designated by 1 as a whole consists of a trough 2 with a slightly inclined flat bottom 5 comprising at its lowest part a opening 6 horizontally elongated, a weir 3 and a plate 4 provided with crenellations 7.

In trough 2, plaster tempered and degassed under vacuum is poured in two parts A and B side by side, part A being strongly tinted and part B being without dye; due to the slight inclination of the bottom 5, the parts A and B flow continuously into the trough, while being subjected to gentle mixing means to obtain their heterogeneous interpenetration, until the opening 6 is extended of the weir 3 and partially masked by the plate 4, the notches 7 of which allow the heterogeneous mixture of the parts A and B to flow in several tinted or non-tinted flows which collect on the weir 3 to finally flow into the mold 8 d 'an element of interior decoration and simulate in the molded mass the veining of a marble.

The present invention finds a particular advantageous application in the production of chimney breasts, as described in the publication
FR 2621105 (MARGINS).

 Although a preferred embodiment has been described and shown, it should be understood that the scope of the present invention is not limited to this form, but that it extends to any process and / or device comprising the characteristics set out above.

Claims (2)

1.- Mold molding process for decorative elements  interior or exterior plaster-based, characterized  in that it consists of  1 ") Mix plaster under vacuum to degas it,  20) Let flow on a slightly inclined surface  at least two flows of wasted and degassed plaster, one of them  at least being very loaded with dye while a  other flux is dye-free,  3) Cause an interpenetration of flows during  of their casting on the inclined surface leading to  a heterogeneous mixture of flows,  4) Divide the heterogeneous mixture into several flows,  5) Gather these latter flows into a single flow to  pour it into the mold. 2.- Device (1) for implementing the molding process  according to claim 1, characterized  in that it includes  - a trough (2) with flat bottom (5) slightly inclined and  with an opening (6) in its lowest part, the  said trough forming said inclined surface on which  flow the flows of wasted and degassed plaster, one of which  (A) at least is strongly tinted, the said fluxes being  subjected, during their casting, to mixing means  gentle intended to cause their interpenetration which  leads to a heterogeneous mixture,  - a weir (3) downstream of the opening (6) of the trough  (2) on which the flows are combined into a single flow  before flowing into the mold (8),  - a plate (4) arranged vertically against the  vertex (6) of the trough to partially hide it  and the lower edge of which is provided with notches (7) intended to divide the heterogeneous mixture into several tinted or non-tinted flows, which will simulate, in the molded mass, the veining of a marble.