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US 12,186,937 B2Granted
Method, plant and molds for forming slabs of agglomerate
OwnerLuca Toncelliinventor
Life of this patent
Estimating the term…
Abstract
A mold (10) intended to form a slab from a mixture of agglomerate, a sheet (15) of PVA-based plastic material deposited over the mold surfaces so as to form with it a surface for subsequent contact with the mixture introduced into the mold for forming the slab, whereby in at least some areas a layer (14) of a fluid agent containing PVA in a solution is interposed between the sheet (15) and the mold surfaces. A system involving a plant and mold are also described.
Claims16
Base portion of a mold usable for forming a slab from a mixture of agglomerate, comprising:
- an internal surface adapted to be covered by at least one sheet of plastic material to form a surface to contact with the mixture of agglomerate when introduced into the mold for forming the slab, the mixture of agglomerate contacting the surface of the sheet of plastic material comprising stone material granules or powder bonded with a hardening resin;
- and
- a plurality of suction ducts connecting a space defined between the internal surface of the base portion and the at least one sheet of plastic material to an external suction means usable to suck air from between the at least one sheet of plastic material and the mold to flatten or stretch the at least one sheet of plastic material against the internal surface of the base portion by means of vacuum, all of the suction ducts extending so as to emerge only laterally inside an internal cavity of the mold base portion, in close proximity to a bottom of the mold base portion;
- wherein the bottom of the mold base portion has a surface roughness whereby micro-channels are created therefrom, the micro-channels allowing the air to be sucked there through;
- and
- wherein the mold base portion is made of flexible polymeric material.
3 more elements
Mold intended to form a slab from a mixture of agglomerate comprising:
- a base portion comprising an internal surface adapted to be covered by at least one sheet of plastic material to form a surface to contact with the mixture of agglomerate when introduced into the mold for forming the slab, the mixture of agglomerate contacting the surface of the sheet of plastic material comprising stone material granules or powder bonded with a hardening resin, the base portion operably connected to an external suction means usable to suck air from between the at least one sheet of plastic material and the mold to flatten or stretch the at least one sheet of plastic material against the internal surface by means of vacuum and a plurality of suction ducts connecting a space defined between the internal surface of the mold base portion and the at least one sheet of plastic material to the external suction means, all of the suction ducts extending so as to emerge only laterally inside an internal cavity of the mold base portion, in close proximity to a bottom of the mold base portion;
- and
- a cover configured to be superimposed to the base portion;
- wherein the bottom of the mold base portion has a surface roughness whereby micro-channels are created therefrom, the micro-channels allowing the air to be sucked there through;
- and
- wherein the mold base portion is made of flexible polymeric material.
3 more elements
A system comprising:
- at least one sheet of plastic material;
- a mold usable for forming a slab from a mixture of agglomerate comprising stone material granules or powder bonded with a hardening resin, the mold comprising a base portion having an internal surface;
- a station configured for depositing the at least one sheet of plastic material on the internal surface;
- and
- external suction means usable to suck air from between the at least one sheet of plastic material and the mold to flatten or stretch the at least one sheet of plastic material against the internal surface by means of vacuum;
- wherein the base portion of the mold comprises a plurality of suction ducts connecting a space defined between the internal surface of the mold base portion and the at least one sheet of plastic material to the external suction means, all of the suction ducts extending so as to emerge only laterally inside an internal cavity of the mold base portion, in close proximity to a bottom of the mold base portion;
- wherein the bottom of the mold base portion has a surface roughness whereby micro-channels are created therefrom, the micro-channels allowing the air to be sucked there through;
- and
- wherein the mold base portion is made of flexible polymeric material.
6 more elements
Dependencies are inferred from the claim text.