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AssigneeSACMI-Cooperativa Meccanici Imola-Soc. Coop. A.R.L.
InventorPietro Rivola
Estimating the term…
Method for loading ceramic moulds presenting a die plate having at least one forming cavity in which a die is slidingly received, comprising the following operative steps for each complete loading cycle: preparing a powder layer at least the upper part of which has properties conforming to the required aesthetic characteristics of the exposed face of the tile; transferring said layer to above said at least one forming cavity; depositing into said at least one cavity a powder layer having a thickness greater than that necessary to obtain the desired tile thickness, and before pressing removing, by a mechanical cutting action with simultaneous removal of the thus separated material, the surface layer of the powder contained in the mould cavity, without appreciable mixing of the powder present at the interface between the surface layer and the underlying layer.
A method for loading ceramic moulds presenting a die plate having at least one forming cavity in which a die is slidingly received, comprising the following operative steps for each complete loading cycle:
A plant for loading ceramic moulds provided with forming cavities, comprising a loading carriage presenting a loading compartment provided with a grid for retaining the powders, and driven with horizontal reciprocating rectilinear movement between a retracted position in which it disposes the grid below at least one hopper for supplying a mass of ceramic powder, and an advanced position in which it disposes the grid above the forming cavity of a mould, characterised by comprising a movable implement which is arranged to translate along said forming cavity, and presents a finishing member positioned a short distance from the upper edge of said forming cavity in order, before pressing, to remove a small upper surface layer of powder without any mixing.
Dependencies are inferred from the claim text.
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From the US filing history. Foreign family members aren’t listed.
Feeding the unshaped material to moulds or apparatus for producing shaped articles: treating the surface of the fed layer, e.g. removing material…
Feeding the moulding material in measured quantities from a container or silo: by using a feed box transferring the moulding material from a…
Shaping clay or other ceramic compositions
Term ended 26 Jul 2022 (estimated)
This invention relates in a totally general manner to the manufacture of ceramic tiles, and more particularly concerns a method for loading powder materials into the relative forming moulds.
The invention also relates to the means for implementing said method, and the materials obtained thereby.
The ceramic tile manufacturing sector is known to constantly seek new and original ornamental motifs, and in particular decorations reproducing the appearance of natural stone, such as marble, which is known to present veining and elongate striations of various shapes and colours.
The characteristics and merits of the invention will be apparent from the ensuing detailed description thereof given with reference to the figures of the accompanying drawings, which illustrate by way of non-limiting example three preferred embodiments of the means for implementing the method of the invention.
FIG. 1 is a side section schematically showing the means of the invention associated with usual loading carriage of a ceramic mould.
FIG. 2 shows a part of FIG. 1 on a larger scale.
Said figures, and in particular FIGS. 1 to 3, show a usual ceramic mould, indicated overall by the reference numeral 1, comprising a die plate 2 having a single forming cavity 3, a lower die 4 slidingly received within said forming cavity 3, and an upper die 12 carried by the movable crosspiece of a ceramic press, not shown because of known type.
It should be noted that the mould 1 can have any number of forming cavities 3. The die plate 2 and the die 4 are positioned on the bed of the ceramic press by means of known devices able to adjust their height as required.
On one side of the mould 1 there is a conveyor 5 for removing the formed tiles 6, and on the other side there is a horizontal operating table 8 with which a unit 70 for loading the multi-colour powder 7 into said cavity 3 is associated.