EP1017549A1 - Procede de production de pieces moulees, piece moulee et installation permettant de mettre en oeuvre ce procede - Google Patents

Procede de production de pieces moulees, piece moulee et installation permettant de mettre en oeuvre ce procede

Info

Publication number
EP1017549A1
EP1017549A1 EP98954173A EP98954173A EP1017549A1 EP 1017549 A1 EP1017549 A1 EP 1017549A1 EP 98954173 A EP98954173 A EP 98954173A EP 98954173 A EP98954173 A EP 98954173A EP 1017549 A1 EP1017549 A1 EP 1017549A1
Authority
EP
European Patent Office
Prior art keywords
base material
thermoset
moisture content
fiber
treatment
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP98954173A
Other languages
German (de)
English (en)
Inventor
Herbert Georg Nopper
Wolfgang Erb
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nopper Herbert G
Huettenes Albertus Chemische Werke GmbH
Original Assignee
HUETTENS-ALBERTUS CHEMISCHE WERKE GmbH
HUETTENS ALBERTUS CHEMISCHE WE
Huettens-Albertus Chemische Werke GmbH
Nopper Herbert G
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by HUETTENS-ALBERTUS CHEMISCHE WERKE GmbH, HUETTENS ALBERTUS CHEMISCHE WE, Huettens-Albertus Chemische Werke GmbH, Nopper Herbert G filed Critical HUETTENS-ALBERTUS CHEMISCHE WERKE GmbH
Publication of EP1017549A1 publication Critical patent/EP1017549A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27N—MANUFACTURE BY DRY PROCESSES OF ARTICLES, WITH OR WITHOUT ORGANIC BINDING AGENTS, MADE FROM PARTICLES OR FIBRES CONSISTING OF WOOD OR OTHER LIGNOCELLULOSIC OR LIKE ORGANIC MATERIAL
    • B27N9/00—Arrangements for fireproofing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27N—MANUFACTURE BY DRY PROCESSES OF ARTICLES, WITH OR WITHOUT ORGANIC BINDING AGENTS, MADE FROM PARTICLES OR FIBRES CONSISTING OF WOOD OR OTHER LIGNOCELLULOSIC OR LIKE ORGANIC MATERIAL
    • B27N1/00—Pretreatment of moulding material
    • B27N1/02—Mixing the material with binding agent
    • B27N1/0227—Mixing the material with binding agent using rotating stirrers, e.g. the agent being fed through the shaft of the stirrer
    • B27N1/0254—Mixing the material with binding agent using rotating stirrers, e.g. the agent being fed through the shaft of the stirrer with means for spraying the agent on the material before it is introduced in the mixer

Definitions

  • molded parts in particular also includes plates.
  • chips and / or fiber bundles of renewable fiber-containing raw materials such as wood (in particular annual plants) and straw are used as the molding base material.
  • This base material is also referred to below as chopped material.
  • Particle boards and the like are today mainly produced using liquid resins.
  • the chips (or fiber bundles) used are glued with liquid thermoset resins based on urea, melamine and phenol-formaldehyde resins or mixtures thereof.
  • liquid thermoset resins based on urea, melamine and phenol-formaldehyde resins or mixtures thereof.
  • formaldehyde Since the systems are aqueous at the same time, the chip moisture is increased, so that, for example, a high energy expenditure must be predried before a plate pressing process.
  • thermosetting plastic and the base material are subjected to a treatment in which the base material is simultaneously defibrated and mixed with the thermosetting plastic, and the glued fiber molding material thus obtained is molded into the molded part.
  • the fiber molding material Before the molding into a molded part, the fiber molding material can also be subjected to an aftertreatment as described below and / or known to the person skilled in the art in the field of molded part production.
  • the base material used is surprisingly converted directly into a glued fiber molding material which can be processed into a molded part without further gluing.
  • two factors are responsible for the success according to the invention:
  • the high moisture content of the base material i.e. for example the straw chips, wood chips or the like used and
  • thermosets used as binders according to the invention which are solid at room temperature and are, for example, powdery or granular, are selected from the following groups:
  • resins which are solid and almost water-free at room temperature, are mixed in a suitable dosage form (e.g. in powder form) with the base material used - e.g. straw shavings or wood fibers - possibly together with a suitable hardener.
  • a suitable dosage form e.g. in powder form
  • the base material used e.g. straw shavings or wood fibers - possibly together with a suitable hardener.
  • the solid binders used according to the invention can be used without problems together with the known hardening accelerators, water repellents and release agents and similar processing aids.
  • Graphite can also be added to accelerate the heat transfer during pressing and to facilitate homogenization when the base material / binder mixture is ground.
  • the resins listed above and used according to the invention do not bring any water with them and are distinguished by an irreversible through-hardening which can no longer be split under normal operating conditions; they withstand even the toughest changing conditions.
  • their high fluidity and the very good anchoring ability in or on the organic raw materials enable the glueing of even difficult components, such as straw. It is also important that, even when using impregnated chips or fiber bundles as the base material - especially with chips provided with fire protection impregnation - there is no interference with the gluing. This is ensured in particular by novolak resins adjusted to these needs.
  • the mixture of base material and thermosetting plastic is advantageously subjected to a drying treatment during or after the defibration treatment, in which the moisture content is reduced. Since solid, at least largely water-free thermosets are used as binders, such a drying treatment can be carried out comparatively inexpensively.
  • the base material used is pre-shredded as far as necessary before the thermoset is added.
  • the base material e.g. chips or fibers
  • the base material is adjusted to a moisture content of more than 15% by weight, preferably more than 30% by weight and in some cases more than 45% by weight, before or when the thermoset is added.
  • the adjustment of the moisture content is achieved regularly by adding water to the base material before or during the admixture of the thermoset or treating it with steam.
  • thermosets used according to the invention in the form of a predominantly aqueous dispersion in the base material.
  • the water can contain a fire protection substance, for example a protective salt, with which the molding material is to be impregnated.
  • a fire protection substance for example a protective salt, with which the molding material is to be impregnated.
  • the mixture of thermoset and base material is preferably subjected to a temperature treatment simultaneously with the defibration and gluing treatment, in which the melting temperature of the thermosetting material is briefly reached or exceeded.
  • a temperature treatment simultaneously with the defibration and gluing treatment, in which the melting temperature of the thermosetting material is briefly reached or exceeded.
  • the invention further relates to a molded part comprising (a) a fiber material (such as straw fibers) and (b) a binder based on a thermoset which is solid at room temperature.
  • the invention also relates to a plant for carrying out the method according to the invention and / or for producing the molded part according to the invention, in which means are provided for simultaneous defibering and gluing of a defibratable base material.
  • Wheat straw was cut in a chopper. Using conventional screening devices, the cut wheat straw (straw chips comprising chaff) was divided into 5 fiber fractions (main fractions), which are defined in Table 1 below on the basis of information on the fiber length distribution.
  • each of the 5 main fractions was determined in accordance with DIN 1306, cf. the corresponding column in Table 1 below.
  • Each of the 5 main fractions was then divided into 3 sub-fractions, and one sub-fraction of the 15 main fractions was adjusted to a moisture content of 15, 30 and 50% by weight of water by storage in a climatic room.
  • each mixture of the respective sub-fraction and the phenol novolak powder used was sieved through a sieve with a mesh size of 100 ⁇ m, and the non-deposited phenol novolak powder was weighed out.
  • the difference between the phenol novolak powder used and the weight weighed out corresponds to the amount of powder deposited. From this, the amount of phenol novolak powder deposited was calculated in percent, cf. the corresponding column in Table 1.
  • Table 1 shows that straw choppings with a small fiber length accumulate significantly more powder resin than choppings with a long fiber length.
  • the main fraction in which 85% of the fibers were less than 20 mm long, showed the best accumulation behavior at every moisture content. This main fraction would still be practical for technical applications.
  • chopped material fractions not examined here which essentially consist of even shorter straw particles (such as 95% ⁇ 20 mm), no longer contribute significantly to their strength when further processed into a molded part.
  • Table 1 also shows that within each major fraction, the attachment ability for phenol novolak powder increases with moisture content.
  • the main fraction already mentioned (85% ⁇ 20 mm fiber length), with a moisture content of 50%, showed the greatest willingness to attach all of the (sub) fractions examined.
  • only 46% of the phenol novolak powder used was deposited on the chopped material; 54% of the thermoset was weighed back after sieving through the 100 ⁇ m sieve.
  • wheat straw was cut and fractionated in a chopper.
  • the fiber fraction was divided into 4 sub-fractions, and each of these sub-fractions was adjusted to a moisture content of 8, 15, 30 or 50% by weight of water, as described above under a), see Table 2.
  • Each of the 4 sub-fractions was treated in a fiberizing mill for 8 minutes with 15% by weight of a phenol novolak powder.
  • each glued subfraction was dried back to a moisture content of ⁇ 6% by weight and the fiber length distribution and the bulk density were determined.
  • the (first) subfraction with a moisture content of 8% by weight was fiberized in the fiberizing mill on the one hand, but on the other hand there was also a considerable shortening of the fibers, so that 95% of the straw fibers had a length of less than 20 mm after passing through the mill (according to initially 26%).
  • the bulk density of the glued fiber material of the first subfraction was 0.1 g per liter (see Tab. 2) compared to 0.35 g per liter for the non-glued chopped material (see Tab. 1).
  • the sub-fractions with a moisture content of 15, 30 and 50% by weight were investigated in an analogous manner. It was found that the fiber shortening decreased sharply towards higher moisture contents, while the splitting of the straw particles used in the longitudinal direction, i. H. their fraying came to the fore. At the same time, the bulk density of the glued fiber material (after passing through the mill) decreased towards the sub-fractions with a high moisture content.
  • thermoset used for example, the glued fiber material according to Table 1, fourth main fraction (40% ⁇ 20 mm), sub-fraction with moisture content 30% with the product according to Table 2, third sub-fraction (fiber length after the mill 42% ⁇ 20 mm, moisture content 30%) .
  • Pre-shredded wood chips (chopped material / base material) with a moisture content of approx. 80% by weight are conveyed in a quantity of 10 t / h atroot through a dosing screw to a fiberizing mill. In this way, 10% or 1 t / h novolak powder resin is added and premixed using a dosing scale.
  • the downstream mill shreds the chopped material and promotes the mixing of the components.
  • a glued fiber molding material is formed.
  • This glue-coated fiber-form material (chip / fiber-resin mixture”) is fed to a drum dryer in a conventional manner, which is set to an off ⁇ inlet temperature of about 90 ° C. The exit moisture is then still about 2% and the resin has been melted. The further cooling that occurs leads to a particularly strong bond between the fiber and the resin grain.
  • a subsequent forming station forms a nonwoven for sheets ⁇ thickness of 20 mm with a density of 680 kg / m 3. This feeds a heating press, where pressing takes place at temperatures of 220 ° C with a heating time factor of 10 sec / mm and the Duro ⁇ plast hardens.
  • the plates produced are processed in a known manner.
  • Straw bales are broken up and crocheted to a length of approx. 60 mm.
  • the crochet egg (base material) with a moisture content of approx. 12% is transported in a throughput rate of 6 t / h atro by an impregnation screw.
  • an aqueous fire protection agent is added in a quantity of 30% protective salt as a 40% solution and mixed with the straw chips.
  • Another dosing device takes over the conveying of the impregnated chopped material to a fiberizing mill via a discharge screw. 15% or 900 kg / h of novolak powder (resin) are metered in and distributed homogeneously on this route.
  • the mixture has a moisture content of approx. 50%.
  • the mill is equipped with reaming jaws and takes care of the shredding of the straw chips, the homogenization and the gluing.
  • the glued fiber molding material then passes through a current dryer with an outlet temperature of approx. 75 ° C. The drying takes place to a humidity of approx. 6%.
  • the Novolak resin powder - adjusted to these conditions - is particularly firmly fixed on the straw fiber.
  • a fleece for a plate thickness of 8 mm with a density of 750 kg / m 3 is produced in a downstream scattering station.
  • a heating press compresses the fleece into sheets and cures the resin at temperatures of 190 ° C with a heating time factor of 15 sec / mm.
  • the plates are further processed in the usual way according to the prior art.
  • Rice straw is cut to a length of, for example, 40 mm.
  • the chopped material obtained in this way comprises approximately 8% by weight of moisture and is metered into a vacuum impregnating machine in an amount of 4 t / h there impregnated with an aqueous 40% fire protection agent at approx. 25 mbar for at least 5 minutes.
  • the protective salt intake is about 25-35%.
  • a dosing silo equipped with a discharge device takes over the feeding of the impregnated chopped material with a moisture content of now approx. 40% into a subsequent fiberizing mill.
  • This mill also has a metering device for powder resins in the inlet area.
  • a total of 12% novolak resin i.e. H. 480 kg / h distributed over the straw material (chopped material or fibers formed from it).
  • the straw material is mixed, defibred and glued simultaneously.
  • the mill is advantageously operated with air. This takes over the transport of the raw materials (rice straw chips / fibers, resin) through the mill to a combined separating filter system. Hot transport air is preferably used so that the moisture is expelled and at the same time the resin is particularly firmly fixed to the fibers at an outlet temperature of, for example, approximately 80 ° C.
  • the glued and dried fiber molding material then has a moisture set for the pressing of, for example, approximately 8%.
  • a moisture set for the pressing of, for example, approximately 8%.
  • no Separie ⁇ tion of a resin and fibers so that a homogeneous cross-section is achieved.
  • a plate 30 mm thick and 350 kg / m 3 density is produced with this material.
  • a heating press with a heating plate temperature of 170 ° C is used and a heating time factor of approx. 20 sea. / mm adhered to.
  • the plates produced are processed as usual.
  • fire protection version they are approved by the building authorities and can be used wherever high fire resistance classes are required.
  • a plant according to the invention is designed in such a way as the required process management requires; such an adaptation is easily possible for the person skilled in the art. Among other things, it will be based on the above process examples, which can also be expanded.
  • a suction and air transport system which may be provided is advantageously designed as a ring line or as a dryer-recirculation system.
  • Fig. 1 basic flow chart to explain preferred embodiments of the system according to the invention.
  • Fig. 2 plant for the production of chipboard (flow diagram)
  • Fig. 3 plant for the production of single-layer boards (flow diagram), with a device for moistening dry chips / fibers before the addition of resin
  • Fig. 4 plant for integrated gluing, defibration and drying of molding material (flow diagram )
  • the chopped material is then conveyed to an addition station 3 in accordance with an important alternative A and mixed with a solid thermoset which is added from a container 4.
  • the mixture of moist chopped good and solid thermoset is conveyed to a defibration system 5, in which the simultaneous defibration and gluing treatment according to the invention is carried out.
  • the solid thermosetting plastic is not added to the chopped material in a separate addition station 3 but already in the moistening device 1.
  • the material mix of chopped good and firm Thermosets are then transported from the moistening system 1 into the defibration system 5.
  • moistened chopped good and solid thermoset are conveyed simultaneously or successively into the defibrillation position 5 and only mixed there.
  • a separate addition station 3 is also omitted here.
  • What is common to the configurations according to alternatives A, B and C is that a permanent bond between the molding material, ie. H. the chopped material crushed into fibers, for example, and the solid thermoset is produced.
  • the glued molding material is conveyed out of the defibration plant 5 into a drying plant 6, in which the moisture content of the now glued fiber material is reduced.
  • the glued fiber material is brought from the drying plant 6 into a plant 7 for forming a molding material fleece.
  • the nonwoven produced in the nonwoven formation plant is finally further processed in a plant 8 for the production of molded parts, for example a plate pressing system, to form a molded part.
  • the drying treatment is not carried out in a separate drying system 6 but already in the defibration system 5. So it is a combined fiberizing, gluing and drying system.
  • Plant elements are, for example, conveying devices, dust removal plants, transport plants, cyclones and the like.
  • the vegetable fiber raw materials (as the base or primary material for the molding material) are chopped and moistened (in the moistening device 1) and, if necessary, impregnated.
  • Solid powder resin (from the container 4) is still wet or (in the adding station 3) with the optionally. Chaff mixed well impregnated desired weight ratio ge ⁇ . (If using the naturtrocke ⁇ nen (air-dry) raw materials which are not to be impregnated later, powdered thermosets is for example. No asset- approximately promoting state.)
  • the premix obtained in this way is transported from the addition station 3 to the defibration system 5, which is, for example, a special defibration mill which is operated in a continuous process; there the chopped material is shredded in the manner according to the invention and glued with the thermoset.
  • the defibration system 5 which is, for example, a special defibration mill which is operated in a continuous process; there the chopped material is shredded in the manner according to the invention and glued with the thermoset.
  • step 3 The fiber molding material obtained according to step 3, which is still moist (impregnated) and now glued, is dried (in the drying installation 6 according to alternative D or according to alternative E still within the defibration installation 5), the required press moisture being adjusted and, if necessary, a further fixation of the thermoset takes place on the molding material.
  • Steps 2 and 3 can advantageously be carried out simultaneously. This corresponds to alternative C of the basic flow diagram according to FIG. 1. Steps 3 and 4 can also be carried out simultaneously. This corresponds to alternative E. In a particularly inexpensive variant, steps 2, 3 and 4 are carried out simultaneously. This corresponds to a combination of alternatives C and E.
  • steps 2 and 3 are carried out simultaneously, the attachment of the powder resin to the molding material is particularly promoted.
  • steps 3 and 4 are carried out simultaneously according to alternative E, a particularly good resin fixation on the molding material is achieved.
  • Step 4 can also be carried out simultaneously with a temperature treatment.
  • step 3 a chamfering device is used to carry out step 3 (possibly simultaneously with steps 2 and / or 4), which directly sifts or classifies the fiber molding material glued with the thermosetting plastic and adds it exceed a certain particle size or length again the crushing process (grinding process) fed.
  • the design of the defibration system 5 as an internally classifying comminution device leads to a particularly good homogenization of the glued molding material.
  • straw bales are placed in the straw bale shredder 51. There they are shredded (shredded) and then conveyed into a dosing silo 53 by means of a carrying chain conveyor 52. The shredded straw is then conveyed in metered form onto a discharge metering screw 54, and a fire protection impregnation solution is added to the straw molding material in the inlet zone of the impregnation screw 21 from a fire protection agent big bag 22, which is assigned a dissolving station with metering. After the impregnation, the impregnated molding material is transported into the dosing silo 55 (volume: 50 m 3 ) with screw discharge 23.
  • the impregnated and therefore moist straw molding material on the screw discharge 23 is mixed with a powdered thermoset (powder resin) according to the invention, which is fed from a powder resin big bag 24 with a metering station.
  • the molding material mixed with the powder resin is weighed on a roller belt weigher 56 and then into the fiberizing mill 25 promoted.
  • the defibration and gluing according to the invention takes place there.
  • the molding material in the stream is ⁇ dryer 26 dried. Drying takes place to a humidity of, for example, 6%. At the same time, the resin powder - adjusted to these conditions - is fixed on the molding material fibers or chips.
  • the molding material After emerging from the current dryer 26, the molding material is conveyed into a scattering bunker 27 (with discharge device), which creates a fleece from the straw molding material and deposits it on a molding belt 57 with a basis weight scale 58.
  • the fleece passes on the belt 57 to a nonwoven separation and extraction unit 59 and then finally reaches a pressing-Be ⁇ send ribbon (a-daylight press for example) 60 for conveying the straw-mat in a heated press 28th
  • the fleece is then compressed into a plate in this heating press and the thermoset is cured.
  • the finished plates are taken to a take-off belt 61 and from there to a lifting table 62.
  • bales of molding material e.g. straw or hemp bales
  • bale conveyor into a bale shredder 63, where they are torn.
  • the molding material fibers or shavings are applied from the bale ripper to a belt conveyor 64, to which an overband magnet 65 is assigned.
  • the molding material arrives in an impact hammer mill 66, where the fibers or chips of the molding material are pre-shredded.
  • a desired moisture content of the molding material is set in a downstream humidification system 31; moistening can take place, for example, by injecting water or by means of steam.
  • An air transport system conveys the moistened, comminuted form mate rial ⁇ a silo housing 67, to which a discharge device 68 is associated with metering screw.
  • the molding material passes through a metering trough into a fiberizing machine 35b, for example an ultrafibrator or refiner. Here (pre-) defibration takes place.
  • An air transport system then conveys the molding material into a floating dryer 36 with control and gas surface burner, where the molding material is dried to a desired degree of moisture if necessary.
  • the molding material is conveyed from the additionally sifting floating dryer 36 to a reversing screw 69, which is operated in the event of a fire against the usual conveying direction in order to keep burning items of transport away from the other system elements.
  • the molding material then passes through a screening machine 70.
  • the molding material then reaches a silo housing 71, to which a discharge device 72 with a metering screw and - subsequently - a belt scale 73 are assigned. From there, the molding material reaches a second fiberizing machine 35a, where it is mixed and homogenized with a thermoset according to the invention, which is fed from a glue preparation and metering system 34.
  • thermosetting plastic is then added in the form of a dispersion in the humidification system and the fiberizing and gluing according to the invention takes place in fiberizing machine 35b.
  • thermoset according to the invention is conveyed by means of a trough belt conveyor or an air transport system (as an alternative to the belt conveyor) into a litter bin 37 which has a molding head for forming a fleece.
  • the binder-containing molding material emerges from the molding head in the form of a fleece and is moved between scattering walls on a molding belt 74 with a chain conveyor and press feed chain conveyor; a basis weight scale for controlling the spreading hopper is assigned to the forming belt.
  • a cross-cut saw (210 mm) 75 with a catcher cuts this Nonwoven to the desired format and a metal detector located behind it detects any metal contamination of the nonwoven. If metal is detected, a faulty scattering system 76, which interacts with an extraction system, removes the faulty nonwovens.
  • the nonwovens are finally fed to a press system 38, which, however, is preceded by a surface spray system 77, in which water or release agent is sprayed onto the nonwovens. Plates according to the invention are produced in the press system. Conventional further processing devices follow the press system, cf. also Fig. 2.
  • a transport screw 78 for pre-crushed molding material (for example pre-crushed straw) is shown, which conveys it onto a dust sieve 79.
  • the molding material is largely dedusted here.
  • the pre-comminuted molding material is then conveyed in a metered manner on an impregnating screw 41, and a fire protection impregnating solution is added to the molding material in the inlet zone of the impregnating screw 41 from a metering station 42, which is assigned a dissolving station with metering.
  • the impregnation takes place on the impregnation screw at a reduced pressure of, for example, 25 mbar.
  • the impregnated molding material is transported into the dosing silo 80.
  • the molding material is weighed on a downstream roller belt weigher 81 and then conveyed into an ultra-rotor defibration mill 45 with an integrated classifier, a metering screw 82 and a hot air device 83 (for drying and temperature treatment). Simultaneously with the conveying of the molding material into the fiberizing mill 45, powder resin is fed into the fiberizing mill via the metering screw 82 from a metering station 44. Means 84 are provided which have the effect that the mass of molding material conveyed into the mill per unit of time and the mass of powder resin introduced are at least approximately in a predetermined relationship to one another.
  • the weighing signal of the roller belt weigher 81 can be used as a reference signal in order to specify the amount of powder resin that flows from the powder resin metering station 44 via the Dosing screw 82 to be entered in the fiberizing mill 45.
  • the molding material is simultaneously fiberized, glued with powder resin and dried. Drying is carried out by means of hot air flowing through, which is generated, for example, in a heating register 29 and introduced into the mill from below.
  • the mill 45 comprises means for screening or classifying the in their befindli ⁇ chen molding material (in its glued or unbelei th state). ⁇ rough portions are sifted in the head of the machine and returned to the grinding circuit in a lower inlet region. In this way, stalk knots and the like can also be undone, which is why a separate sifter can also be dispensed with.
  • the finished glued and dried molding material fibers are conveyed into a separator 85 for dry fibers. From there, they finally reach a dosing silo (litter bunker) 47, where a fleece is produced from the glued molding material, for example by means of an associated spreading device.
  • a dosing silo (litter bunker) 47 where a fleece is produced from the glued molding material, for example by means of an associated spreading device.

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  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Wood Science & Technology (AREA)
  • Forests & Forestry (AREA)
  • Mechanical Engineering (AREA)
  • Dry Formation Of Fiberboard And The Like (AREA)
  • Paper (AREA)

Abstract

L'invention concerne un procédé de production de pièces moulées, notamment de panneaux d'aggloméré et de fibres de bois, selon lequel une matière thermodurcissable solide est ajoutée à une matière de base pouvant être défibrée et ayant une teneur en humidité d'au moins 9 % en poids. La matière thermodurcissable et la matière de base sont soumises à un traitement aux fins d'encollage. La matière de base est simultanément défibrée et mélangée à la matière thermodurcissable. La matière moulable fibreuse encollée et éventuellement soumise à un traitement ultérieur, ainsi obtenue, est façonnée en pièce moulée. L'invention concerne également une pièce moulée comprenant une matière fibreuse et un agent liant à base d'une matière thermodurcissable solide à température ambiante.
EP98954173A 1997-09-18 1998-09-14 Procede de production de pieces moulees, piece moulee et installation permettant de mettre en oeuvre ce procede Withdrawn EP1017549A1 (fr)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
DE19741248 1997-09-18
DE19741248 1997-09-18
DE19810964 1998-03-13
DE19810964 1998-03-13
PCT/DE1998/002714 WO1999014022A1 (fr) 1997-09-18 1998-09-14 Procede de production de pieces moulees, piece moulee et installation permettant de mettre en oeuvre ce procede

Publications (1)

Publication Number Publication Date
EP1017549A1 true EP1017549A1 (fr) 2000-07-12

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EP98954173A Withdrawn EP1017549A1 (fr) 1997-09-18 1998-09-14 Procede de production de pieces moulees, piece moulee et installation permettant de mettre en oeuvre ce procede

Country Status (4)

Country Link
EP (1) EP1017549A1 (fr)
AU (1) AU1142299A (fr)
CA (1) CA2303870A1 (fr)
WO (1) WO1999014022A1 (fr)

Cited By (1)

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WO2002081161A1 (fr) * 2001-04-03 2002-10-17 P & T Gmbh Projekt- Und Technologieentwicklung Procede de traitement de vegetaux annuels pour produire des panneaux de fibres ou de copeaux ainsi que d'autres pieces moulees

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Publication number Priority date Publication date Assignee Title
DE102005061222A1 (de) * 2005-12-20 2007-06-21 Dynea Erkner Gmbh Pflanzliche Faser, Formkörper auf Faserbasis sowie Verfahren zur Herstellung von mit Novolak versehenen pflanzlichen Fasern
WO2008017933A1 (fr) * 2006-08-07 2008-02-14 Dynea Oy Dispersion aqueuse de novolac stable
CN107671980A (zh) * 2017-11-17 2018-02-09 河南鑫饰板业有限公司 中密度板铺装生产线上的加湿和检测结构

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