摘要:
The invention relates to dry polymeric materials, especially to dry materials useful as barrier or adhesive materials in dry-application onto a surface, such as polymer film, aluminium foil or the like and especially onto a moving web. The invention particularly relates to dry-application of barrier polymers and/or lamination adherents onto a web. In the method for the dry-application of barrier and/or adhesive materials onto webs or surfaces powdery polymeric material with particle or particle agglomerate size between 0.01 and 500 mu m, preferable between 1 and 50 mu m is dry-applied by ionic blasting onto a web or a surface, which is selected from paper, board, polymer film, metal foil, and which is optionally a moving web.
摘要:
An Arrangement for processing a paper or board web (1) or a similar fibre web is shown, by means of which arrangement a processing mixture is applied to the surface of the web (1). The arrangement comprises a nip formed by two moving surfaces, elements for taking the web (1) to said nip, and spray nozzles (11) arranged between a dryer-cylinder group (2) and said nip for feeding the processing mixture to at least one surface of the web (1) in such a way that wet processing mixture comes at least between one of the two moving surfaces and the web (1) to said nip, wherein at least one of the moving surfaces forming said nip is provided by a soft roll (8) or a belt.
摘要:
The invention relates to a continuously operating drum debarking method for processing logs. The logs to be debarked are fed into a debarking drum (4') having no bark discharge openings in the shell. The logs together with the bark loosened therefrom are discharged to a downstream bark separating system. Therein, the logs are subjected mutual movements resulting in the removal of bark from about the logs. The thus separated bark pieces are further discharged onto a conveyor system located under the separating equipment.
摘要:
A dewatering element (100) is connected by radio-frequency electromagnetic radiation from an object to be measured (102) to a measuring device unit (900) measuring water content and the dewatering element (100) acts at an interface between the measuring device unit (900) and the object to be measured (102) both structurally and operatively as a coupling element whose relative permittivity is higher than 75. The surface of the dewatering element (100) is partly metal-coated. The dewatering element (100) transfers radio-frequency electromagnetic radiation of less than 1 GHz between the object to be measured (102) and the measuring device unit (900) for measuring water content in the object to be measured (102).
摘要:
A device for aligning the refining disc of a refining apparatus, in which refining apparatus lignocellulose-containing material is disintegrated and refined, which device is intended to be arranged in a support (701) for the axle package of the refining apparatus, the supporting (701) resting on a ground surface, which axle package comprises the rotary refining disc of the refining apparatus, a rotation axle to which the rotary refining disc is attached, and a bearing housing (702) in which the axle is journalled by means of bearings arranged in the bearing housing (704). The device comprises a first wedge-shaped member (703), which is slidable in a direction along said ground surface, and a second wedge-shaped member (704) provided between the first member (703) and the bearing housing (702) of the axle package, which second member (704) is slidable in a direction transverse to the sliding direction of the first member (703), and the first member (703) when displaced in its sliding direction is arranged to displace the second member (704). The device comprises a control device for displacing the first member (703) and a support means (706), on which the bearing housing (702) rests, which is provided between the second member (704) and the bearing housing (702) and arranged to engage with a to the support means (706) comple- mentary recess (707) of the bearing housing (702). The support means (706) has a convex contact surface (708) against the recess (707) of the bearing housing (702), and the convex contact surface (708) of the support means (706) is dis- placeable in relation to the surface of the complementary recess (707) of the bearing housing (702). Support and refining apparatus comprising said device.
摘要:
A method of and equipment for manufacturing a fibrous web, comprising the formation of at least one layer of fibrous web from stock with a solids content of over 1.5%, water being removed from the said fibrous web by first pressing the fibrous web to a solids content of about 45 to 65%, then evaporating the fibrous web to a solids content of about 75 to 95%, after which the fibrous web is treated by means of a pressing contact to increase its smoothness, the fibrous web being treated in the manufacturing process before the reeling stage by at least one pressure and heat treatment, wherein the forming pressure exerted on the fibrous web is not higher than 20MPa.
摘要:
The invention relates to a method and arrangement for placing end shields on the ends of paper, pulp, or board reels (1) in connection with packing. The arrangement comprises at least one first conveyor (1) for transporting the reels (3) in a direction parallel to their axes and at least one station (4) for placing at least one inner end shield on the end of a reel (5). Next to the first conveyor (1) there are elements (8, 9) for placing an inner end shield and after the station there are elements (1) for changing the direction of the axis of the reel (5), relative to the first direction of travel, after the placing of the inner end shields, and elements for placing at least one outer end shield on the end of the reel. Further, the arrangement comprises elements (11) for making the direction of travel of the reel to deviate from the first direction of travel prior to the placing of the outer end shield, and end-shield collection stations, which are located within the operating area of one element placing the end shields, so that this element can transfer both inner and outer end shields for placing.
摘要:
Method and equipment for the removal of oil from a paper, board or finishing machine roll, especially preferably from a so-called variable crown roll. The characteristic feature of the method and equipment according to the invention, in which method and equipment the oil accumulating inside the roll (10) is collected in a suitable location (19) inside the roll (10) and removed from there with a pump, is that oil or oil and air are removed from inside the roll (32) using a self-priming centrifugal pump (30, 30', 30"; 60, 70).
摘要:
A roll and blade gap former for a paper machine having first and second wires guided in a respective loop and defining a twin-wire forming zone, a forming gap in which the first and second wires converge before the twin-wire zone, a headbox including a slice channel having a slice opening through which a stock suspension jet is fed into the forming gap to form a web between the wires, and drainage and forming elements arranged in the twin-wire zone for removing water from the web. To provide an improvement in the control of the Z-direction properties of the web, the former includes turbulence generating vanes arranged in the slice channel in the headbox to cause turbulence in the stock suspension jet upon its discharge from the slice opening into the forming gap and a first forming roll arranged in the twin-wire zone and which constitutes the first drainage and forming elements in the twin-wire zone after the forming gap. A run of the twin-wire zone after the forming gap is curved over a wrap angle sector of the first forming roll which is less than about 25 DEG . The forming and draining elements produce a pulsating pressure effect on the web after the curved run of the twin-wire zone over the wrap angle sector of the first forming roll. A method for controlling the anisotropy of web formed in a roll and blade former is also described.