Abstract:
A wire coiling arrangement includes a rotatable wire coiling mandrel (34) which incorporates a wire receiving slot (33) which extends axially rearwardly from a forward end of the mandrel and which has a slot mouth or entrance (40) facing towards the front end of the mandrel. A coil ejection arrangement (43-46) is arranged for movement along the mandrel (34), between a withdrawn wire coiling position and a forwardly located coil ejection position, such as to push a coil wound on the mandrel axially therefrom. The coil ejection arrangement also carries wire guides (42) which in one setting position of the ejection arrangement form a continuation of the slot mouth (40) which widens outwardly from the forward end of the mandrel.
Abstract:
Method and grinder for the manufacture of fibre pulp from lignocellulosic material, such as wood chips or the like, The fibres are detached from the material by means of a grinding member (6) and the fibrous material is formed into a body, which without rotational movement is fed, while being compressed, into a grinding zone (5) which has converging wall surfaces. In the grinding zone (5) the fibrous material is worked upon by the grinding member (6) which is rotatable relatively to the body of fibrous material and which delimits at least one of the converging wall surfaces of the grinding zone (5). The detached fibres are removed (at 8) from the grinding zone.
Abstract:
A method and a means for manufacturing cellulose pulp from ligno-cellulose fiber material wherein the fiber material is treated under steam pressure. The treatment is carried out in a mill (18, 32) or similar means under such conditions that substantially all the liquid present in the material and/or added thereto during the treatment is converted into gaseous form or steam. The gas or steam thus generated, plus any added gas, is used to convey the cellulose material at high velocity to at least one subsequent separating vessel (22, 36, 38, 40) wherein the fibers entrained with the gas or steam are given a trajectory of motion in the course of which the fiber material is sorted with respect to weight, surface area, or other distinguishing features.
Abstract:
A Process of producing fiberboard according to the wet method in a closed backwater system. Chips of lignocellulose-containing material after defibration to pulp are suspended in backwater so as to obtain a pulp suspension for forming of wet sheets, which are liberated from water by compression under supply of heat, the squeezed-out water being returned to the suspension step. The pulp obtained in the defibration is dewatered mechanically and the obtained aqueous solution of organic substance released during the defibration step is used for impregnation of the chips prior to the defibration, whereby said substance is bound in the pulp.
Abstract:
The invention relates to an apparatus for removing, by partial vacuum, particles, liquids etc. from a substrate (7). The apparatus includes a connection conduit (3) which is common to a plurality of channels (5a, 5b, 5c, etc.), and distributes partial vacuum to the one ends of the channels (5a, 5b, 5c, etc.), the conduit being arranged to be connected (at 4) to a source of partial vacuum establishing requisite partial vacuum at the one ends of the channels (5a, 5b, 5c, etc.). The other ends of the channels (5a, 5b, 5c, etc.) are obliquely inclined in relation to that substrate (7), from which material is to be removed, for the purpose of retaining the other ends of the channels (5a, 5b, 5c, etc.) open against the substrate (7) on abutment thereagainst, at least that space between said other ends and substrate which is hereby created being bridged by a suitably somewhat resilient portion (2a) which is arranged to seal from the other ends of the channels (5a, 5b, 5c, etc.) against the substrate (7).
Abstract:
A reactor (10) suited to accomplish at the same time the chemical reactions and operations of size reduction of the solid materials in suspension and particularly for treatments in the cellulose and/or paper pulp industry; characterized by the fact that the working environment is essentially a closed one, provided in the lower part with a rotor (22) which creates a turbulence with flows interesting essentially the whole volume of the closed environment and fitted to realize said conditions of the size reduction of solid materials with intimate mixing of same with the suspending liquid.
Abstract:
A method of making fibreboards by the dry method technique where a lignocellulose-containing fibre material is disintegrated into fibres which are dried and formed into a fibre mat which is hot-pressed. Binding between the fibres is obtained by means of a binder which can be added before or after drying. According to the invention the binder is added before drying and the fibres with the binder are dried to have a moisture content substantially lower than that moisture content in the material which is suitable for hot-pressing. After drying, moisture is added to the fibre material in a degree such as to attain the moisture content suitable for hot-pressing, whereby the tackiness of the binder, which has got lost to a great extent during drying, is restored.
Abstract:
Method of directly in water combusting dissolved or finely dispersed organic material by means of molecular oxygen under elevated pressure and at a temperature varying between 180 and 340 C. The combustion takes place in at least two steps, of which in a first step the combustion is driven as far as to set free up to 90 % of the combustion heat of the organic material. In a second step organic material more insensitive against oxidation and residual in the water is combusted in the presence of a large surplus of molecular oxygen, and steam-gas mixture effluent from this second step is fed to the first step either alone or after addition of further molecular oxygen, so that the content of molecular oxygen in the steam-gas mixture is sufficient for performing the combustion of incoming organic material in said step to the aforestated degree of combustion.
Abstract:
A process to produce pulp from vegetable, cellulose-containing fibrous material such as coniferous wood, hardwood, straw, bagasse etc., the fibrous material being treated in several stages. In a first stage the fibrous material is impregnated with a solution of sodium hydroxide, in which solution the material is soaked and partly disintegrated by mechanical working. In a second stage excess of alkaline solution is squeezed out to such extent that the content of sodium peroxide in the raw pulp amounts to at least 15 kgs per BD ton of pulp. In a third stage the pulp material is subjected to additional disintegration under supply of a solution of sodium carbonate so that a pumpable pulp suspension having a sodium carbonate content of 150-400 kgs per BD ton of pulp is obtained. In a fourth stage the pulp suspension is subjected to a cooking process at a temperature of at least 100`C during 1-4 hours and under stirring and supply of oxygen, whereupon the cooked pulp is washed.
Abstract:
Method and apparatus for making pulp of grinding goods, such as fibre material, in the grinding zone of a grinding apparatus by pressing it against a grinding surface (10) provided with a pattern (16) extending in the direction of movement of the grinding goods over the grinding surface for desintegration of the grinding goods. Steam generated during the grinding work causes a pressure rise along the grinding surface. The region for the maximum pressure in the grinding zone is established with the aid of measurements of the pressure course in the grinding zone and the pattern is formed in a predetermined region around this pressure centre so that braking of the grinding goods will be obtained.