During the manufacture of slabs with a veined effect a liquid or powder colouring agent is deposited on the surface of a thin layer of starting mixture by means of at least one dispensing device and the resultant mixture is supplied, falling freely, from one end of an extractor belt forming the bottom of a mixture metering/distributor unit, following which the mixture is transferred, falling freely, onto a temporary moulding support. This results in the production of slabs provided with veining extending through the entire thickness of the slabs and also visible along the whole edge of the slab, even after it has been machined.

A pressing method for pressing ceramic slabs, comprising the following steps: spreading a layer (1) of granular or powdered material onto a pressing plane (2), wherein the layer (1) comprises at least a first zone (11), with a prefixed area and border, made of a granular or powdered primary material, and at least a second zone (12), with a prefixed area and border, made of a granular or powdered secondary material different from the primary material; pressing the layer (1) using a press (P); separating at least a main portion (10) of the first zone (11) from the second zone (12).

The invention relates to a method and a plant for the continuous production of engineered stone slabs. In the method, raw materials comprising at least one mineral filler and one organic binder are mixed, applied to a lower belt of a dual-belt press, or a conveying means mounted upstream of the lower belt, and subsequently continuously pressed, and the binder is cured. A continuously-obtained material strand is separated into individual engineered stone slabs. It is provided that the mixing operation of the raw materials is carried out at staggered times in a batch mixing operation by means of at least two separate mixing devices. The mixed raw materials from the mixing devices are transferred into one, or multiple, spreading device(s) at staggered times and are applied continuously and without interruption to the lower belt, or the conveying means mounted upstream of the lower belt, by means of the spreading device(s).

The proposed solution solves a problem of designing a machine for producing molded composite parts that are homogeneously structured and the problem of finding a method for producing composite for implants. The essence of the design of the machine consists in that it has a portioning assembly, whereby above a mold form unit (14) there is a guiding unit (11) located opposite a dosing unit (6) and above the aforementioned guiding unit (11) there is a pressing assembly (20) slidingly mounted on a vertical frame (19) and which is equipped with at least one piston rod (25) with a rammer (27) at its end. A preliminary molding is being performed by thoroughly filling a preform trough and then the matter is being pushed out of the preform trough in portions and then each portion is rammed separately until consistency containing less than 15% air is achieved.

In an exemplary embodiment, a system for making tied block mat with a border includes a mold having an array of mold cavities; and a hopper that receives a hardenable paste and is spaced from the mold to receive a sheet of mesh material therebetween, the hopper having an opening for depositing the hardenable paste into selected mold cavities, the hopper forming a filling zone with the mold wherein the hardenable paste flows through the opening into the selected mold cavities, and a blocked zone where the hardenable paste is prevented from entering other selected mold cavities of the mold; whereby the tied block mat is formed wherein the hardenable paste in the selected mold cavities becomes embedded in the sheet of mesh material in the filling zone, and a border is formed in the blocked zone where the hardenable paste is blocked from entering the other selected mold cavities.

A mix dispenser (14) comprises a hopper (24) with a top opening (26) for filling the hopper with a predetermined amount of mix and a bottom opening (28). The dispenser comprises a conveyor (30) which forms the bottom of said hopper (24) and is designed to extract the mix from the hopper (24) and convey it towards an end from where it falls into a mould. The dispenser is characterized in that said conveyor (30) comprises a supporting meshwork (32) made of a material resistant to the vapours of solvents such as styrene and operated by an electric motor (34). Furthermore a plant comprising such as dispenser is also described.

A concrete curb forming and extruding apparatus with wheel adjustment locks, and an adjustable slip form system shaping cementitious material into a continuous curb forced there through by an extruder which receives materials stored in a hopper with dasher. The extruder has a rotary trowel compacting member which continually forces material from the hopper into compressed concrete passing through an adjustable slip form to fill the same and form differing shaped continuous curbing underneath fences or against vertical surfaces or conventional curbing, depending upon the slip form setting.

The proposed solution solves a problem of designing a machine for producing molded composite parts that are homogeneously structured and the problem of finding a method for producing composite for implants. The essence of the design of the machine consists in that it has a portioning assembly, whereby above a mold form unit (14) there is a guiding unit (11) located opposite a dosing unit (6) and above the aforementioned guiding unit (11) there is a pressing assembly (20) slidingly mounted on a vertical frame (19) and which is equipped with at least one piston rod (25) with a rammer (27) at its end.

A preliminary molding is being performed by thoroughly filling a preform trough and then the matter is being pushed out of the preform trough in portions and then each portion is rammed separately until consistency containing less than 15% air is achieved.

A concrete curb forming and extruding apparatus with wheel adjustment locks, and an adjustable slip form system shaping cementitious material into a continuous curb forced there through by an extruder which receives materials stored in a hopper with dasher. The extruder has a rotary trowel compacting member which continually forces material from the hopper into compressed concrete passing through an adjustable slip form to fill the same and form differing shaped continuous curbing underneath fences or against vertical surfaces or conventional curbing, depending upon the slip form setting.

A machine and method for compacting a powder material comprising ceramic powder; a layer of non-compacted powder material is conveyed to a compacting device, which enables a layer of compacted powder material to be obtained; the machine comprises a conveyor belt for carrying the powder material from an input station, in the area of which a feed assembly feeds the powder material to the conveyor assembly, to the compacting device; a straightening device is envisaged, which is designed for exerting a force to increase the flatness of the conveyor belt at least in the area of the input station.