The present invention relates to a method for manufacturing a slab comprising solid fillers and organic binders. More in detail the present method comprises a method for manufacturing a slab having a front layer and a rear layer, said slab comprising fillers, organic binders and additives. The present method furthermore relates to a slab obtained according to the present method.

Embodiments of a system and a method for manufacturing a gypsum board include a forming assembly configured to form the gypsum board to be within a predetermined thickness range and to detect vibration at the forming assembly during the continuous manufacture of gypsum board that is indicative of a hardened lump of slurry that may cause manufacturing process problems being lodged at or passing through the forming assembly. The forming assembly includes first and second forming members, an actuator, a vibration sensor, and a controller. The vibration sensor is arranged with respect to one of the first and second forming members to detect the vibration of said forming member. The controller is programmed to control the actuator to increase the height between the second forming member and the first forming member by a predetermined amount in response to the vibration signal from the vibration sensor satisfying a condition.

System for manufacturing ceramic articles, in particular ceramic slabs or tiles, comprising: a compaction device; a conveyor assembly to transport powder material along a given path from an input station to an output station; a digital feeding assembly to feed powder material to the conveyor assembly at the input station so as to generate a layer of powder material, with feeding devices each comprising a plurality of distribution elements along its transverse output mouth, as well as corresponding actuators; a detection unit to detect the height or thickness of the powder material; and a height correction unit, located upstream of the detection unit and of the compaction device, operable to modify the height or thickness of the layer of powder material crosswise to said moving direction, depending on the data detected by said detection unit, so as to make it more uniform.

The invention relates to a method for the mass decoration of ceramic products, comprising the following steps: spreading, superposed on one another, a layer (L) of granular or powder material and a decorative layer (3) on a support surface (2); transferring the layer (L) from the support surface (2) to an accumulation belt (T1), contiguous and aligned to the support surface (2), which is located at a lower height than the support surface (2), wherein the accumulation belt (T1) is mobile in advancement at a speed that is different from the advancement speed of the support surface (2), so that a variation in the thickness and longitudinal extension of the layer (L) is produced; pressing the layer (L) and the decorative layer (3).

A method in which a stream of dry cementitious powder from a dry powder feeder passes through a dry cementitious powder inlet conduit to feed a first feed section of a fiber-slurry mixer. An aqueous medium stream passes through at least one aqueous medium stream conduit to feed a first mixing section the fiber-slurry mixer. A stream of reinforcing fibers passes from a fiber feeder through a reinforcing fibers stream conduit to feed a second mixing section of the fiber-slurry mixer. The stream of dry cementitious powder, aqueous medium stream, and stream of reinforcing fibers combine in the fiber-slurry mixer to make a stream of fiber-cement mixture which discharges through a discharge conduit at a downstream end of the mixer.

Machine and method for compacting ceramic powder (CP); a layer of non-compacted ceramic powder (CP) is conveyed in a feed direction (A) through a compacting device (2); downstream of the compacting device (2) there is positioned a detection device (8) which detects the density of the layer of compacted ceramic powder (KP); the quantity of ceramic powder (CP) fed to the compacting device (2) is varied in time as a function of what is detected by the detection device (8) to thus regulate the density of the layer of compacted ceramic powder (KP).

A pressing device for pressing a layer of ceramic material, comprising: a press (10), provided with a lower pad (11), provided with a pressing surface (11a) facing upwards and arranged below the active portion (3) of a first movable belt (2), and an upper pad (12), provided with a pressing surface (12a) facing downwards and arranged above the active portion (3) of the first movable belt (2); a compactor (20), arranged upstream of the press (10), which comprises a lower presser (21), provided with a pressing surface (21a) facing upwards, which is arranged below the active portion (3) of a first movable belt (2), and an upper presser (22), provided with a pressing surface (22a) facing downwards, which is arranged above the active portion (3) of the first movable belt (2). The pressers (21,22) of the compactor (20) can be activated independently of the pads (11,12) of the press (10).

A pressing device for pressing a layer of ceramic material, comprising: a press (10), provided with a lower pad (11), provided with a pressing surface (11a) facing upwards and arranged below the active portion (3) of a first movable belt (2), and an upper pad (12), provided with a pressing surface (12a) facing downwards and arranged above the active portion (3) of the first movable belt (2); a compactor (20), arranged upstream of the press (10), which comprises a lower presser (21), provided with a pressing surface (21a) facing upwards, which is arranged below the active portion (3) of a first movable belt (2), and an upper presser (22), provided with a pressing surface (22a) facing downwards, which is arranged above the active portion (3) of the first movable belt (2). The pressers (21,22) of the compactor (20) can be activated independently of the pads (11,12) of the press (10).

A method in which a stream of dry cementitious powder from a dry powder feeder passes through a dry cementitious powder inlet conduit to feed a first feed section of a fiber-slurry mixer. An aqueous medium stream passes through at least one aqueous medium stream conduit to feed a first mixing section the fiber-slurry mixer. A stream of reinforcing fibers passes from a fiber feeder through a reinforcing fibers stream conduit to feed a second mixing section of the fiber-slurry mixer. The stream of dry cementitious powder, aqueous medium stream, and stream of reinforcing fibers combine in the fiber-slurry mixer to make a stream of fiber-cement mixture which discharges through a discharge conduit at a downstream end of the mixer.

A pressing device, comprising: a lower presser (10), provided with a pressing surface (10a) facing upwards; an upper presser (11), provided with a pressing surface (11a), facing downwards; at least one of the two pressers is movable towards and away relative to the other in order to perform pressing of a layer (L) of a ceramic material; a pressing space (V) delimited inferiorly and superiorly by the lower presser (10) and by the upper presser (11); a lower belt (2), movable along a forward direction (Y) and comprising an active portion (3) arranged at least partially between the upper presser (11) and the lower presser (10); an upper belt (4), movable along the forward direction (Y) and comprising an active portion (5) arranged at least partially between the lower belt (2) and the upper presser (11); two side barriers (13,14,15), arranged to laterally contain the layer (L) within the pressing space (V).