Apparatus and a method for scattering particles to form a mat
AssigneeTimberex-Timber Exports, Ltd.
InventorStanislav Klasterka
Life of this patent
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Abstract
An apparatus is described for scattering particles, in particular particles admixed with at least one binder, such as, for example, fibers, chips or like particles containing ligno-cellulose and/or cellulose, to form a mat, in particular for manufacturing shaped articles, primarily in the form of boards. On the one hand, chipboards, fiberboards and chip/fiber combination boards can be manufactured in an economically favorable manner with the apparatus and method described. Furthermore, boards of variable width can be produced without a time-consuming conversion of the apparatus being necessary.
Claims39
An apparatus for scattering of particles (3, 3′, 20, 21), in particular of particles admixed with at least one binder, such as fibers, chips or the like particles containing ligno-cellulose and/or cellulose, to form a mat (12), in particular for manufacturing shaped articles, primarily in the form of boards, having at least a metering hopper (1, 1′, 16, 17) containing the particles, having at least one scattering station (8, 8′, 15) for the particles (3, 3′, 20, 21) positioned after the metering hopper (1, 1′, 16, 17) and having a forming band (11) to receive the mat (12) arranged underneath the scattering station (8, 8′, 15), characterized in that at least three scattering stations (8, 8′, 15) are provided arranged one after the other along the forming band (11), of which the first (8) is formed to scatter fibers (3), the second (15) to scatter chips (20, 21) and the third (8′) again to scatter fibers;
- and in that the chip scattering station (15) comprises a fractionating device (34, 35) to separate fine and coarse chips (20, 21) with at least two fractionating sections (32′) for the fine chips (20, 21) and at least one fractionating section (32″″) for the coarse chips, with the fractionating sections (32′) for the fine chips (20, 21) forming the starting and end regions of the fractionating device (34, 35) and the fractionating section (32″″) for the coarse chips (20, 21) being arranged between the fractionating sections (32′) for the fine chips (20, 21).
An apparatus in accordance with one of the preceding claims, characterized in that each scattering station (8, 8′, 15) has its own metering hopper (1, 1′, 16, 17) assigned to it.
An apparatus in accordance with one of the preceding claims, characterized in that the scattering stations (8, 8′, 15) are formed separately from one another.
An apparatus in accordance with one of the preceding claims, characterized in that a pre-pressing apparatus for the fiber mat scattered from the fiber scattering station is arranged between the fiber scattering station arranged at the entry side and the chip scattering station.
An apparatus in accordance with one of the preceding claims, characterized in that a pressing apparatus, in particular a continuous pressing apparatus (42), for the mat (12) is situated downstream of the fiber scattering station (8′) arranged at the exit side.
A method for the manufacture of chip/fiber combination boards which each comprise two cover layers formed from chips admixed with at least one binder and an intermediate layer arranged between the cover layers and formed from chips admixed with binder, in particular for the operation of an apparatus in accordance with one of the preceding claims, characterized in that the lower cover layer is scattered from essentially homogeneous fiber material;
- in that an at least three-layer intermediate layer formed from chips of varying size is scattered onto the lower cover layer, with the inner layer of the intermediate layer being scattered from coarse chips and the outer layers of the intermediate layer being scattered from fine chips;
- and in that an upper cover layer of essentially homogeneous fiber material is scattered onto the intermediate layer.
A chip/fiber combination board with in each case two cover layers (13, 37) formed from fibers (3, 3′) admixed with at least one binder and an intermediate layer (36) arranged between the cover layers (13, 37) and formed from chips (20, 21) admixed with at least one binder, characterized in that the lower cover layer (13) consists of essentially homogeneous fiber material (3);
- in that the intermediate layer (36) consists of chips (20, 21) of different size and comprises at least three layers, with the inner layer of the intermediate layer consisting of coarse chips and the outer layers of the intermediate layer consisting of fine chips;
- and in that the upper cover layer (37) consists of essentially homogeneous fiber material (3′).
An apparatus for scattering of particles (3, 3′, 20, 21), in particular of particles admixed with at least one binder, such as fibers, chips or the like particles containing ligno-cellulose and/or cellulose, to form a mat (12), in particular for manufacturing shaped articles, primarily in the form of boards, having at least one metering hopper (1, 1′, 16, 17) containing the particles (3, 3′, 20, 21), having at least one scattering station (8, 8′, 15) positioned after the metering hopper (1, 1′, 16, 17) to scatter the particles (3, 3′, 20, 21) onto a forming band (11) arranged underneath the scattering station (8, 8′, 15) for the formation of the mat (12) with a pre-set width B2, characterized in that a particle separating device (46, 47, 54, 55, 60, 61) is provided in the direction of movement (14) of the forming band (11) downstream of the scattering station (8, 15) at the upper side of the forming band (11) to separate at least some of the particles (3, 3′, 20, 21) transported on the forming band (11) and forming the lateral marginal region of the mat (12) from the remaining particles of the mat (12);
- and in that the particle separating device (46, 47, 54, 55, 60, 61) is formed adjustably to set the width B2 of the remaining mat (12).
Dependencies are inferred from the claim text.