摘要:
The invention relates to a knife assembly for slicing woodwool, comprising a knife with a chip surface (1), a clearance surface (2) and a cutting edge (3), defined by the intersection between both surfaces. The knife assembly is characterized by guiding ribs (4) extending perpendicularly to the cutting edge (3) and joining the chip surface (1) with an end (5) that substantially coincides with the cutting edge (3) and with the guiding surface joining said end and rising there towards. The guiding ribs (4) can be formed integrally with the knife.
摘要:
The invention relates to an apparatus for producing sideways curved wood wool fibers. The apparatus comprises a flat rotatable disc (2), in the surface of which is provided at least one knife assembly (7) comprising a thickness knife (8) which projects slightly above the surface of the disc (2) and which has a cutting edge extending substantially radially and further comprising width knives (9) positioned as seen in the direction of rotation of said disc (2), ahead of said thickness knife (8) and having a cutting edge extending substantially tangentially. The width knives (9) are positioned in the immediate vicinity of the thickness knife (8), whereas their cutting edge may engage the thickness knife (8). Further the apparatus is provided with at least one feeding device (5) for feeding the disc (2) with wood blocks (6) to be cut up into fibers. Further a run-up guide may be positioned ahead of the width knives.
摘要:
The invention relates to a method and apparatus for metering and distributing pouring material (1) comprising a mixture of wood fibres or such base materials and a mineral binding agent for the production of chipboards, fibre boards or particle boards, especially cement-bonded particle boards, wherein the pouring material (1) is metered volumetrically and the volume and/or weight of the supplied pouring material (1) is controlled, such that along the length and also across the width of the boards to be produced a regular distribution is obtained. Starting from a supply bunker (2) and through a pivotal belt (3) the pouring material (1) is metered to an intermediate supply bunker (7) which in a metered manner supplies a stream of pouring material (1), being regular during the course of time as well as transversely to the direction of supply, to a metering belt (17) which distributes the material on top of a mould belt (22), in such a way that a uniform specific weight and a uniform distribution of the pouring material (1) across the entire surface of the complete boards are obtained.
摘要:
A process for the production of sugars, and optionally cellulose and lignin, from lignocellulosic vegetable materials which comprises subjecting the vegetable materials to a chemical pretreatment with a mixture of water and lower aliphatic alcohols and/or ketones at a temperature from 100.degree. to 190.degree. C. for a period of from 4 hours to 2 minutes with control of the breakdown of the hemicellulose components followed by separation of residue and a subsequent main chemical treatment with a similar solvent mixture at elevated temperatures for a further period of from 6 hours to 2 minutes.
摘要:
Thin sheets are sliced from a block of wood by means of a continually moving planing tool. As each sheet is separated from the block it is deposited on a slowly moving conveyor. On this conveyor the sheets are superimposed in staggered relationship like fish scales and form a steady stream conveyed to a wool cutting station where a cutter cuts the wood wool from the superimposed sheets transversely thereto.
摘要:
A process for the production of sugars, and optionally cellulose and lignin, from lignocellulosic vegetable materials which comprises subjecting the vegetable materials to a chemical pretreatment with a mixture of water and lower aliphatic alcohols and/or ketones at a temperature from 100.degree. to 190.degree. C. for a period of from 4 hours to 2 minutes with control of the breakdown of the hemicellulose components followed by separation of residue and a subsequent main chemical treatment with a similar solvent mixture at elevated temperatures for a further period of from 6 hours to 2 minutes.