Abstract:
A method of manufacture of multilayer gypsum board, and a gypsum additive delivery system, including wet gypsum board passing through a board forming station in which additives are delivered to one or more layers of a multi layered gypsum board panels, such as engineered polymers, providing a better and more water resistance surface. Preferably, the gypsum board has a first layer of a mixture of set gypsum having an outer surface and a polymeric compound or wax emulsion additive entrained therein and impregnated in a thin sheet of randomly aligned inorganic fibers to essentially encase the core gypsum within two facing layers.
Abstract:
A method for producing building panels involves, by means of a process conveyor (9), passing panel cores (2) and adjacent mesh (7) beneath a number of processing stations (12, 13, 15) in order to bond the mesh to the core by means of a cementitious coating. Subsequently the panels are passed to a drying conveyor (4) including a heater (36) for drying of the coating.
Abstract:
The invention relates to a gypsum fiber board (10) produced in a Siempelkamp dry-process, comprising 75 wt% to 90 wt% (relative to the total dry mix) of calcium sulfate hemi-hydrate and 10 wt% to 25 wt% (relative to the total dry mix) paper fibers, wherein the calcium sulfate hemi-hydrate is a mixture of α-calcium sulfate hemi-hydrate and β-calcium sulfate hemi-hydrate, wherein the content of α-calcium sulfate hemi-hydrate in the mixture is at least 5 wt% (relative to the total calcium sulfate hemi-hydrate). Further the invention relates to a method for producing a gypsum fiber board (10) of a thickness of 23 mm in a Siempelkamp dry-process.
Abstract:
A method of manufacture of multilayer gypsum board, and a gypsum additive delivery system, including wet gypsum board passing through a board forming station in which additives are delivered to one or more layers of a multi layered gypsum board panels, such as engineered polymers, providing a better and more water resistance surface. Preferably, the gypsum board has a first layer of a mixture of set gypsum having an outer surface and a polymeric compound or wax emulsion additive entrained therein and impregnated in a thin sheet of randomly aligned inorganic fibers to essentially encase the core gypsum within two facing layers.
Abstract:
A process is disclosed for continuously producing fibre-reinforced moulded bodies (7) from hydraulic materials applied in at least one layer, having predetermined width and thickness, by one or several dispensers on a moving substrate (20, 21) and having glass fibres as reinforcement. For economical manufacture with a high yield and considerably improved quality, at least two separate layers (1, 2) of the hydraulic material are applied by at least two dispensers (10, 11), located at a defined distance from the substrate, on two substrates (20, 21) that move in opposite directions, and flat structures of fibres (3, 4) are applied on the layers (1, 2). The layers (1, 2) are moved towards each other and united under a controlled pressure into a product (7) shaped on both outer surfaces, then deflected in a discharge direction (40) and discharged following thickness grading.
Abstract:
A method of forming a coating layer on a fibrous mat to make a coated article includes depositing a coating composition on a carrier material and at least partially embedding a first major surface of a fibrous mat in the coating composition, the fibrous mat including a plurality of mat fibers. The coating composition is at least partially hardened to form a coating layer at the first major surface of the fibrous mat. A second major surface of the fibrous mat opposite the first major surface includes an uncoated portion of the plurality of mat fibers.
Abstract:
The invention relates to a method for producing multi-layer flat products (26). Said flat products preferably comprise a core (1) of solid material, laminated with a number of layers which are processed in a sequence of work steps into the final product. The method is characterised in that the entire sequence of work steps, such as the configuration of a multi-layer strip, moulding, cutting the strip into lengths, separating, transporting, stacking and removing the lengths from the mould, take place with the material positioned on-end. In a preferred embodiment, the core (1) is optionally laminated with a first inner sandwich layer, consisting of a relatively soft material (2, 2'), a second intermediate sandwich layer incorporating a reinforced-fibre structure (3, 3'), in addition to a third external sandwich layer consisting of a film, bonded-fibre or rubber moulding material (4, 4'). Said layers (2, 3, 4; 2', 3', 4') are first combined on a horizontal transport path into multi-layer laminates (11, 11') using vibration energy and said laminates are then deviated onto a vertical transport path and further laminated into a continuous, vertical base material strip (5) by continued vibration and compression of the core layer (1).
Abstract:
Described is a flat-extrusion process for the production of, in particular, laminated wood panels, and a device for carrying out the process. The process comprises the following steps: the mixture is fed through mixing/dispersal equipment (1) into a vertical, conically tapering shaft (A, B) formed by moving presser belts (13, 14); the mixture is compressed by the conical shape of the shaft (B) and over the following distance (C) during which the presser belts are disposed parallel to each other and a distance apart equal to the thickness of the extruded panel; the extruded panel is allowed to harden over the following sizing stage (3).