EP4045710A1 - Fibre-moulding facility for producing moulded parts made of fibre material degradable in an environmentally friendly fashion - Google Patents
Fibre-moulding facility for producing moulded parts made of fibre material degradable in an environmentally friendly fashionInfo
- Publication number
- EP4045710A1 EP4045710A1 EP20799969.9A EP20799969A EP4045710A1 EP 4045710 A1 EP4045710 A1 EP 4045710A1 EP 20799969 A EP20799969 A EP 20799969A EP 4045710 A1 EP4045710 A1 EP 4045710A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- molded part
- pulp
- suction
- layer
- fiber
- 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.)
- Granted
Links
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Classifications
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21J—FIBREBOARD; MANUFACTURE OF ARTICLES FROM CELLULOSIC FIBROUS SUSPENSIONS OR FROM PAPIER-MACHE
- D21J3/00—Manufacture of articles by pressing wet fibre pulp, or papier-mâché, between moulds
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21J—FIBREBOARD; MANUFACTURE OF ARTICLES FROM CELLULOSIC FIBROUS SUSPENSIONS OR FROM PAPIER-MACHE
- D21J5/00—Manufacture of hollow articles by transferring sheets, produced from fibres suspensions or papier-mâché by suction on wire-net moulds, to couch-moulds
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
- D21F13/00—Making discontinuous sheets of paper, pulpboard or cardboard, or of wet web, for fibreboard production
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21J—FIBREBOARD; MANUFACTURE OF ARTICLES FROM CELLULOSIC FIBROUS SUSPENSIONS OR FROM PAPIER-MACHE
- D21J1/00—Fibreboard
- D21J1/08—Impregnated or coated fibreboard
Definitions
- the invention relates to a method for the production of molded parts from environmentally degradable fiber material by means of a fiber molding process in a fiber molding plant, with which additionally an application of a functional layer or a layer system of several functional layers and / or an application of a further layer of fiber material to a to be coated Surface of the molded part is made possible.
- the invention also relates to a fiber molding system for producing molded parts according to this method and molded parts produced with this fiber molding system.
- the raw material basis here is the pulp.
- the pulp consists of water, natural fibers and a binding agent such as industrial starch (potato starch) and has a pulpy consistency.
- the invention is based on the object of providing an effective and flexible manufacturing method for environmentally compatible molded parts made of natural fibers and a corresponding machine with which different products (molded parts) can be produced in a variable and reproducible manner with good quality, the molded parts thus produced being suitable for different applications .
- the object is achieved by a method for the production of molded parts from environmentally compatible degradable fiber material by means of a fiber molding process in a fiber molding plant comprising the following steps
- At least one first pulp as a liquid solution with environmentally compatible degradable fiber material in at least one first pulp reservoir
- the suction tool as a multi-tool comprising a plurality of suction heads, each with a three-dimensional suction head suction side adapted to a contour of the molded part to be molded, and suction of the fiber material onto the respective suction head - suction sides of the suction heads by means of negative pressure in the suction tool from the first pulp; and discharging the final molded part; wherein the production method additionally comprises applying a functional layer or a layer system made up of several functional layers and / or applying a further layer made of fiber material to a surface of the molded part to be coated.
- the term "environmentally compatible degradable fiber material” refers to fiber materials that can be decomposed under environmental influences such as moisture, temperature and / or light, the decomposition process taking place for a short time, for example in the range of days, Weeks or a few months.
- the “environmentally compatible degradable fiber material” is also sometimes referred to as “fiber material” in the following. In this case, neither the fiber material nor the decomposition products should pose an environmental hazard or contamination.
- Fiber materials, which in the sense of the present invention represent an environmentally compatible degradable fiber material are for example natural fibers obtained from cellulose, paper, cardboard, wood, grass, plant fibers, sugar cane residues, hemp etc. or from their components or parts thereof and / or appropriately recycled material.
- An environmentally compatible, degradable fiber material can also designate artificially produced fibers such as PLA (polylactide) etc., which correspond to the above fiber materials or have their properties.
- the environmentally compatible degradable fiber material is preferably compostable.
- the environmentally compatible, degradable fiber material and the containers made from it are preferably suitable for introduction into the recycling of materials in the German biowaste bin and as a resource for biogas plants.
- the fiber materials and the containers made from them are preferably biodegradable in accordance with EU standard EN 13432.
- the term “pulp” refers to fluid masses that contain fibers, in this case the environmentally friendly degradable fiber material.
- liquid here denotes the physical state of the pulp, the liquid pulp comprising the environmentally friendly degradable fiber material in the form of fibers (liquid solution with the environmentally degradable fiber material).
- the fibers can be present as individual fibers, as a fiber structure or fiber group made up of several connected fibers.
- the fibers represent the fiber material regardless of whether they are in the pulp as individual fibers, fiber structures or fiber groups.
- the fibers are dissolved in the liquid solution in such a way that they float in the liquid solution with the same concentration as possible, regardless of location, for example as a mixture or suspension of liquid solution and fiber material.
- the pulp can be appropriately tempered and / or circulated in some embodiments.
- the pulp preferably has a low consistency, ie a proportion of fiber material less than 8%.
- a pulp with a proportion of environmentally compatible degradable fiber material of less than 5%, preferably less than 2%, particularly preferably between 0.5% and 1.0%, is used in the process according to the invention.
- This low proportion of fiber material can, among other things, prevent the fiber material from clumping together in the liquid solution, so that the fiber material can still be molded to the suction tool with good quality.
- the liquid solution can be any solution suitable for the fiber molding process.
- the pulp can be an aqueous solution with the environmentally friendly degradable fiber material.
- An aqueous solution represents, among other things, a solution that is easy to handle. In this case, the pulp cannot contain any organic binder, preferably likewise no non-organic binder.
- the molded parts produced from originally environmentally friendly degradable fiber material can be degraded in a particularly environmentally friendly way, since no environmentally critical binder, preferably no binder at all, is used.
- no environmentally critical binder preferably no binder at all.
- the absence of binders is made possible by the combination of the molding, preforming and hot pressing steps, which in their entirety ensure good mechanical interlinking of the individual fibers with one another in the fiber material of the molded part.
- the mechanical linkage is so strong that binders can be dispensed with for dimensional stability of the molded part.
- the environmentally compatible degradable fiber material consists essentially of fibers with a fiber length of less than 5 mm.
- the pulp is provided at a temperature of less than or equal to 80 ° C., preferably less than or equal to 50 ° C., particularly preferably room temperature. These low temperatures allow, among other things, simple process management, in particular at room temperature. The hot pressing process can be accelerated a little at higher temperatures.
- the method according to the invention uses at least one first pulp reservoir with a first pulp.
- pulp reservoirs (second, third, ...) filled with correspondingly further pulps (second, third, 7) can also be used.
- the pulps can differ from one another in their composition or further properties (eg temperature) or at least some of the pulps can have the same composition and / or the same further properties.
- the fiber molding process refers to the process steps that are involved in the formation of the molded part, starting with the provision of the pulp, the molding of the molded part in the molding station from the fiber material from the pulp, to the discharge of the final molded part Molding including the application of a functional layer or a layer system of several functional layers and / or an application of a further layer of fiber material to a surface of the molding to be coated, the application or applications being arranged at each point in the fiber molding process that is suitable for the respective layer to be applied can be.
- the application and application can take place in separate stations or in a common station, depending on the embodiment.
- Some fiber molding processes within the scope of the present invention provide only one application, only one application, or both processes in the fiber molding process.
- the fiber molding process according to the invention additionally includes preforming and / or hot pressing.
- the molded parts can have any shape, also referred to here as a contour, provided that this shape (or contour) can be produced in the method according to the invention or the method is suitable for producing this shape (or contour).
- the components used for the fiber molding process can be adapted to the respective shape (or contour) of the molded part.
- different appropriately adapted components such as the suction tool, the suction head, possibly the pre-pressing unit, the hot-pressing station, etc. can be used.
- End-formed molded parts can represent a wide variety of products, for example cups, containers, vessels, lids, bowls, portion containers, envelopes or containers for a wide variety of purposes.
- the suction tool here refers to the tool in which the large number of suction heads for forming the respective molded parts are arranged, so that the individual suction heads in the suction tool are also moved with the movement of the suction tool.
- the media supply of the suction tool with several suction heads is guided in a suitable manner in the suction tool to the individual suction heads.
- Such a suction tool is referred to as a multi-tool because it comprises a large number of suction heads.
- a multi-tool a large number of molded parts can be formed simultaneously from a common pulp reservoir according to the number of suction heads, which increases the throughput of the fiber molding system and thus allows the fiber molding system to be produced more economically.
- the at least partial immersion of the suction tool into the pulp denotes at least one touch of the pulp with all suction heads located in the suction tool in such a way that, due to the vacuum or suction pressure applied to the pulp with the suction tool, the fiber material is sucked out of the pulp or the pulp with it in this dissolved fiber material is sucked in.
- the negative pressure can be applied to the suction tool or suction heads via suitable connections by means of a pump system in which a suction pump is operated.
- the suction head can comprise a suitable gas line system which forwards the negative pressure provided by the pump to the suction head as suction pressure.
- the suction tool is not only placed on the pulp, but dipped into it.
- the depth of immersion of the suction tool in the pulp depends on the respective application and the respective fiber molding process and can differ depending on the application and, if applicable, the molded part to be molded.
- the suction head can have a negative shape.
- a negative shape is a shape where the suction side of the suction head, i.e. the side where the fiber material is deposited due to the suction effect of the suction head and thus forms the molded part, is on the inside of the suction head, so that this inside is located on the Pulp or dipping the suction head into the pulp forms a cavity into which the pulp with the fiber material is sucked (as shown in Fig. 6).
- the outside of the later molded part is directed towards the inside of the suction head. After molding, the molded part therefore sits on the inside on the inside of the suction head.
- the suction head can also have a positive shape.
- a positive form is a form where the suction side of the suction head, i.e. the side where the fiber material is deposited due to the suction effect of the suction head and thus forms the molded part, is on the outside of the suction head, so that this outside is located on the Pulp or immersion of the suction head in the pulp does not form a cavity (as shown in Fig. 6).
- the inside of the later molded part is directed towards the outside of the suction head. After molding, the molded part therefore sits on the outside of the suction head.
- the forming of the molded part denotes a first pre-forming of the molded part, this being formed from fiber material previously randomly distributed in the pulp by means of the attachment of the fiber material to the contour of the suction head with the corresponding contour.
- the molded part still has a large proportion, for example 70% -80%, of liquid solution, for example water, and is therefore not yet stable in terms of shape.
- a molded part is molded in a simple manner from a pulp with a fiber material, which is very flexible depending on the configuration of the contour of the suction head can deliver molded parts with a wide variety of contours.
- the ratio of width or diameter to height of the molded part is not a limiting or critical parameter for the quality of the production of the respective molded part.
- the application or application of the functional layers, the layer system with such layers or the further layer of fiber material (hereinafter also referred to as coating) on the previously molded fiber material (molded part to be coated) serves, for example, to create an at least partial barrier effect against the transport of material the fiber material out, into the fiber material in or through the fiber material can be avoided or at least reduced to an acceptable level.
- the molded part can, for example, have a barrier effect against the penetration of moisture, water, aromatic substances, flavorings, odorous substances, fats, oils, gases such as O2 and N2, light acids and all substances that contribute to the perishability of food and / or substances that are not suitable for use with food be awarded. All technologies suitable for molded parts made of fiber material can be used for application or application.
- the method according to the invention provides an effective and flexible manufacturing process for environmentally compatible molded parts made of natural fibers and a corresponding machine with which different products (molded parts) can be produced in a variable and reproducible manner with good quality, the molded parts thus produced being suitable for different applications, for example for the food sector with appropriate barrier layers.
- the method comprises, after the molding, the further step of preforming the molded part in a preforming station by means of a pre-pressing pressure exerted on the molded part.
- a preformed molded part that is stable enough for further processing and has a further reduced proportion of liquid solution is produced in a simple manner from a molded molded part that is still mechanically unstable.
- Preforming enables the molded parts to be produced and processed further in a very reproducible manner and with great accuracy and quality in terms of shape and layer thickness of the individual molded part sections.
- the pre-pressing can be carried out at a temperature of the pre-pressing unit of less than 80 ° C., preferably less than 50 ° C., particularly preferably at room temperature.
- a temperature of the pre-pressing unit of less than 80 ° C., preferably less than 50 ° C., particularly preferably at room temperature.
- the pre-pressing is carried out at the pre-pressing pressure between 0.2 N / mm 2 and 0.3 N / mm 2 , preferably between 0.23 N / mm 2 and 0.27 N / mm 2 .
- These moderate pressures enable the molded part to solidify gently with moderate liquid reduction, which is advantageous for a low-scrap molding process.
- the suction tool with the plurality of suction heads and the molded parts located therein is preferably pressed onto a stationary prepress station with a plurality of pre-press lower tools adapted to the suction tool, or the pre-press lower tool is pressed onto a stationary suction tool.
- the suction tool represents the pre-pressing upper tool of the pre-pressing unit.
- the suction tool is placed on the pre-pressing lower tool and pressed onto the pre-pressing lower tool by means of a separate pressing unit, for example a piston rod.
- the suction tool can also be attached to a robot arm, which exerts the pre-compression pressure itself via the suction tool on the pre-compression lower tool.
- the molded part remaining in the suction tool is attached to the pre-compression lower tool for pre-pressing in such a way that it is arranged between the pre-compression lower tool and the suction tool, so that the suction tool can be pressed onto the pre-compression lower tool with the pre-compression pressure.
- the method comprises the further step of hot-pressing the at least molded-on molded part with a hot-pressing pressure after the molded part has been transferred to a hot-pressing station for the final shaping of the molded part.
- the hot pressing in the fiber molding process can take place with or without pre-pressing. If a pre-pressing is also carried out, the hot pressing is carried out after the pre-forming. After the pre-pressing has taken place, the pre-formed molded part is preferably transferred to the hot-pressing station by means of the suction tool, for which purpose the molded part is removed from the suction tool for subsequent hot-pressing.
- the transfer is advantageous in that the hot pressing is carried out at a high temperature with a significantly higher pressure.
- the fiber material could get caught in the sieve of the suction tool and be removed from the suction tool only with difficulty, possibly only with damage after the hot pressing. also the sieve could be damaged by the high pressure, so that the suction tool would no longer function afterwards.
- the transfer can take place in such a way that the molded part (s) from the suction tool are passed to the hot-pressing station passively by depositing or actively by means of an ejection pressure in the suction tool against the molded parts.
- the molded part With the hot pressing of the pre-pressed molded part with a hot press pressure, the molded part is finally shaped with a further reduction of the proportion of the liquid solution in the molded part, for example to below 10%, preferably to about 7%, after which it is then stable and dimensionally stable.
- the hot pressing avoids lengthy drying procedures in drying ovens.
- the hot-pressing lower and upper tools are preferably made of metal.
- the hot pressing is carried out at the hot pressing pressure higher than the pre-pressing pressure, for example at a hot pressing pressure between 0.5 N / mm 2 and 1.5 N / mm 2 , preferably between 0.8 N / mm 2 and 1.2 N / mm 2 .
- the hot pressing pressure can be applied for a pressing time of less than 20s, preferably more than 8s, particularly preferably between 10 and 14s, even more preferably 12s.
- the hot pressing pressure is applied hydraulically to the hot pressing station via a piston rod, for example, this piston rod pressing, for example, on the hot pressing upper tool, which in turn presses on the stationary hot pressing lower tool, with the molded part in between.
- the arrangement could also be carried out the other way round.
- the hot pressing station is used to produce, in a simple manner, from a preformed and still slightly variable molded part by means of hot pressing a molded part that is finally shaped for further processing and has a significantly reduced proportion of liquid solution.
- the hot pressing station enables the molded parts to be produced and processed further in a very reproducible manner and with great accuracy and quality in terms of shape and layer thickness of the individual molded part sections.
- the combination of prepressing and hot pressing enables a particularly reproducible production of molded parts with particularly good quality and a particularly small amount of rejects.
- end-stable molded parts can be produced in a particularly simple, effective and flexible manner from environmentally compatible degradable fiber material with good quality and good reproducibility.
- the desired contour of the molded part and thus the corresponding shaping components are preferably designed in such a way that all surfaces of the molded part have an angle ⁇ of at least 3 degrees to the pressing direction during hot pressing.
- the surface to be coated can be an outer surface of the molded part and / or an inner surface of the molded part.
- the molded part or the content of the molded part can be protected from the outside and / or inside by applying or applying a coating.
- the application comprises a conditioning of the surface to be coated and a subsequent coating of the conditioned surface to be coated.
- the conditioning prepares the fiber material on its surface or even in its depth for a subsequent coating, which facilitates the application of layers, for example improves the adhesion or the functionality of such layers and / or stabilizes them over a longer period of time.
- the surface to be coated is coated, preferably sprayed, with a material that smooths and / or fills the surface, preferably a biocompatible material, in preparation for the coating step.
- a material that smooths and / or fills the surface preferably a biocompatible material, in preparation for the coating step.
- the molding is sprayed with wax and / or varnish or coated with PTFE during conditioning.
- wax refers to an organic compound that melts at over 40 ° C and then forms a liquid of low viscosity. This makes waxes easy to apply to a surface by spraying. Their low melting temperature enables fiber materials to be soaked or impregnated with wax. The penetration process of the wax into the fiber material can be supported by increased temperatures above the melting temperature. Waxes are almost insoluble in water, but soluble in organic, non-polar media. Waxes can be very different in their chemical composition and origin and can be waxes according to the definition of the German Society for Fat Science.
- the waxes that can be used here can be natural waxes such as animal waxes (for example wool wax, china wax, beeswax, tallow or insect wax) or vegetable waxes (for example sugar cane wax, camauba wax, candilla wax, cork wax, Guaruma wax, ouricuri wax, palm wax, esparto wax, cotton wax, rice bran wax, flax wax, peat wax, rose wax, jasmine wax, Peethe wax, myrtle wax or wax fig wax) and partly synthetic or synthetic waxes (for example soy wax, rapeseed wax, castor wax).
- the wax is preferably a wax that is approved as a food additive.
- the term “paint” refers to liquid or powdery coating materials.
- the lacquer or lacquer layer can be applied thinly to objects and is built up into a continuous, solid film (layer) through chemical or physical processes (e.g. evaporation of the solvent). Paints usually consist of binders such as resins, dispersions or emulsions, fillers, pigments, solvents and additives. The paint is preferably a food-approved paint.
- PTFE refers to polytetrafluoroethylene, which is a fully fluorinated polymer.
- the PTFE coating is usually applied and then subjected to a temperature treatment. A PTFE coating is used as a non-stick coating in many applications. PTFE is very inert. Even aggressive acids cannot attack this coating.
- the wax is applied to the molded part as a functional layer in a layer system.
- wax can serve as a water barrier.
- the wax is introduced into the fiber material by means of a temperature treatment of the molded part.
- the hot pressing temperature during hot pressing is suitable for this. Therefore, the wax is preferably applied before the hot pressing so that it can penetrate the fiber material during the hot pressing. This can equally apply to suitable paints.
- the coating of the molded part with the functional layer or the layer system is carried out using a physical coating process or a gas phase deposition, preferably vapor deposition, plasma coating or spraying, carried out.
- a physical coating process or a gas phase deposition preferably vapor deposition, plasma coating or spraying, carried out.
- the step of conditioning and / or coating is carried out after the step of hot pressing.
- This is particularly advantageous for the materials that are not suitable for conditioning at hot pressing temperatures.
- the molded part is finished after the hot pressing and is therefore particularly stable in its shape compared to earlier production stages in the fiber molding process.
- the functional layer or at least one of the functional layers in the layer system or the further layer of fiber material has an at least partial barrier effect against substance transport out of the fiber material, into the fiber material or through the fiber material.
- the barrier effect is preferably directed against the penetration of moisture, water, aromatic substances, flavorings, odorous substances, fats, oils and light acids and / or substances not suitable for food.
- Such properties are provided, for example, at least in part by layers of lacquer or wax with a thickness of 0.02 to 0.1 mm or ceramic layers of 0.0005 to 0.02 mm (e.g. an SiOx layer).
- the functional layer with a barrier effect is therefore a wax layer, lacquer layer or a ceramic layer, preferably an SiOx layer or a glass ceramic.
- the functional layer or at least one of the functional layers in the layer system is designed in such a way that, under the conditions of use of the molded part, it releases substances into the surroundings of the molded part that are advantageous for use of the molded part.
- Functional substances or substances that can be released from the molded part are referred to as advantageous substances which, after being released, interact with the surroundings of the molded part in such a way that they exert an advantageous effect on the surroundings of the molded part and / or on the molded part itself.
- the molded part is a plant pot that is planted in the ground together with the plant. When the fiber material is broken down in the soil in an environmentally friendly manner, it releases fertilizers that were previously contained in the fiber material as dopants or particles (built in) were. This means that separate fertilization of the planted plant is unnecessary, as this function is taken over by the molded part itself.
- the advantageous substances can also be substances which, after being released, cause the molded part to rot more quickly.
- the functional layer is doped with an active ingredient that diffuses out of the functional layer under the conditions of use of the molded part.
- an active ingredient that diffuses out of the functional layer under the conditions of use of the molded part.
- This can be supportive for various applications, for example for care, seasoning or changing the taste of the content of the molded part.
- this active ingredient diffuses from the molded part after a hot liquid has been poured into it.
- the active ingredient is a flavoring substance (for example sugar, salt or pepper, a medicinal active ingredient, a substance which supports the environmentally compatible degradation of the molded part or an additive for a content of the molded part.
- the application comprises the following steps: at least partial second immersion of the suction tool with the molded part already formed from the first pulp into a second reservoir with a second pulp; and further shaping of the functional layer by suction of the fiber material from the second pulp reservoir with second pulp onto the fiber material already formed from the first pulp in the respective suction heads.
- a molded part with a double fiber layer a first from fiber material from the first pulp and a second from fiber material from the second pulp
- first and second fiber materials can differ in their effect and, as a double layer, provide a molded part with the desired effect (mechanical and / or chemical) both internally and externally.
- the fiber material of the first molded part can have a different fiber length, different doping, etc. than the layer of second fiber material applied as a functional layer.
- the molded part is made in a common process for the molded part made of fiber material from the first pulp with a functional layer of fiber material molded thereon from the second pulp preformed.
- the pre-pressing tool is adapted to the shape of the molded part with fiber material with a layer of additional fiber material applied to it.
- the ordering comprises the following steps:
- the first molded part placed on the intermediate shelf can be prepared, smoothed, reduced in moisture, and pre-pressed for the later second molded part.
- the suction tool can use the same suction power under the same suction conditions as during the first immersion, since during the second immersion it is free of molded parts and therefore does not have to suck in the second fiber material of the second molded part via a suction side that is already covered with fiber material of the first molded part.
- double layers made of two fiber materials can be produced in a more defined manner.
- the layers of the two fiber materials preferably have a thickness which allows the first and second molded parts to be pushed over one another.
- the application comprises the following steps: transferring and outputting the molded part formed in the suction tool as a first molded part onto or into a clipboard, preferably the pre-press lower tool of the preforming station for later preforming, out of the suction tool; At least partial second immersion of a further suction tool in a further reservoir with a further pulp, the further suction tool as a multi-tool having a plurality of suction heads, each with a three-dimensional one comprises shaped suction head suction side adapted to a contour of the molded part that has already been transferred and dispensed;
- the common molded part from the first and second molded part is preformed in the preforming station by means of the pre-pressing pressure exerted on the common molded part.
- this achieves the same advantages as described above for preforming.
- the first and second molded parts are mechanically connected to one another due to the pre-pressing pressure, since the fibers of the respective fiber materials interlock with one another.
- the first molded part is pre-pressed separately between the pre-press lower tool and the suction tool after the transfer but before it is dispensed in the pre-forming station.
- the pressure exerted here can correspond to the prepress pressure or have other values, preferably lower values.
- the separate pre-pressing prepares the first molded part for the second molded part.
- the outer shape of the first molded part can be pressed together so that the second molded part fits well over the first molded part.
- the first, second and further pulps differ in their compositions, in their solvents, their fiber materials, in their concentrations and / or in proportions and / or in their type of any dopants.
- the first and second molded parts can be equipped with different functionalities, with the respective functionalities being able to be adapted to the respective application.
- the outside of the common molded part can be designed to be printable, while the inside of the common molded part is suitable for the
- the content of the molded part can have suitable properties or is prepared for a coating with further functional layers.
- the functional layer made of further fiber material has a smaller layer thickness than the fiber material previously formed from the first pulp. This means that, among other things, both fiber materials can be connected well and fit well on top of each other.
- the functional layer consists of the fiber material comprising a proportion of a material that smooths and / or fills the fiber material, preferably a biocompatible material. This means that the common molded part can be used for food applications without applying additional coatings.
- the molded part for preforming is arranged between a pre-press lower tool and the suction tool as a pre-press upper tool.
- the invention further relates to a fiber molding plant for the production of molded parts from environmentally compatible degradable fiber material by means of a fiber molding process comprising at least one first pulp reservoir for providing at least one first pulp as a liquid solution with environmentally compatible degradable fiber material; a suction tool attached to a movement unit, which as a multi-tool a
- a discharge unit for discharging the final molded part a control unit which is designed to carry out the method according to any one of the preceding claims on the fiber forming system; wherein the fiber molding system is additionally designed to apply and / or apply a functional layer or a layer system of several functional layers and / or a further layer of fiber material to a surface of the molded part to be coated.
- the movement unit can comprise a robot arm which is freely movable in space and on which the suction tool is mounted.
- the moving unit can move the molded parts easily and flexibly along the fiber molding process.
- the manufacturing process can be accelerated or modified depending on the required production rate.
- the movement unit is therefore provided to transfer the molded parts in the suction tool to the pre-pressing unit of a pre-forming station and / or to the hot-pressing station.
- the control unit can be designed as a processor, separate computer system or web-based and is suitably connected to the components of the fiber forming system to be controlled, for example via data cables or wirelessly by means of WLAN, radio or other wireless transmission means.
- the output unit outputs the molded part for further transport or further processing, for example to subsequent cutting, labeling, printing, stacking and / or packing stations, for example with the aid of a conveyor belt.
- the fiber molding system further comprises a preforming station for preforming the molded-on molded part by means of a pre-pressing pressure exerted on the molded part, see the explanations given above for pre-molding. Preforming is preferably carried out at room temperature.
- the fiber molding system further comprises a hot-pressing station for hot-pressing the at least molded-on molded part after transferring the molded part to the hot-pressing station for final shaping of the molded part with a hot-pressing pressure at a hot-pressing temperature, see the above explanations for hot-pressing.
- the hot pressing is carried out after the preforming on the preformed molded part, particularly preferably the pressure and temperature are higher in the hot pressing than in the preforming.
- the fiber molding system further comprises a conditioning station for conditioning a surface to be coated and / or a coating station for coating the surface to be coated, preferably the surface to be coated previously conditioned with the conditioning station.
- the conditioning station is, for example, a spraying, steaming, painting or coating station for using other conditioning methods.
- the conditioning station is designed as a spray station for spraying the molded part with a material that smooths and / or fills the surface, preferably a biocompatible material, particularly preferably wax and / or lacquer.
- the conditioning station is designed to coat the molded part with PTFE.
- the coating station is designed to carry out a physical layering process or a gas phase deposition, preferably vapor deposition, plasma coating or spraying.
- the coating station is arranged temporally after the hot pressing station in the fiber molding process.
- the time axis of the fiber molding process runs from the molding to the pre-molding, if necessary, followed by the hot pressing to the output of the molded part as a final molded product.
- Functional layers that are not applied as fiber material but as other layers could be impaired or damaged in their functionality by hot pressing.
- such coatings are preferably only applied by means of the coating station when the shape of the molded part is final, that is to say only onto the finally formed molded part.
- the coating station is arranged after the hot pressing station.
- the conditioning station is arranged before the hot pressing station in the fiber molding process.
- the time axis reference is made to the previous paragraph.
- materials applied for conditioning For example, wax that has already been applied, penetrate well into the fiber material in the heated state during hot pressing in order to soak it in depth with wax. This makes the fiber material smoother and / or more homogeneous for a subsequent coating. The same applies, for example, to corresponding paints.
- PTFE itself is heat-resistant, whereby the increased temperature during hot pressing demands the sintering of the PTFE layer and thus the properties of the PTFE layer.
- the fiber molding system comprises a second reservoir with a second pulp in order to enable at least partial second immersion of the suction tool with or without molded parts already formed from the first pulp in the suction heads.
- the fiber molding system comprises at least one further additional suction tool in order to form a second molded part from a further pulp independently of a first molded part from a first pulp, the movement unit being designed to move the second molded part onto or into the preforming station first molding on or to use.
- the fiber forming system comprises a further movement unit on which the further additional suction tool is attached.
- the movement unit or units are respective robots with respective robot arms on which the suction tool or tools are arranged.
- the invention further relates to a molded part made of environmentally compatible degradable fiber material produced with a fiber molding system according to the invention by means of a fiber molding process comprising a functional layer or a layer system of several functional layers and / or a further layer of fiber material applied or applied to the fiber material of the molded from a first pulp Molding.
- the molding according to the invention a variable product and of good quality is provided, which is suitable for different applications, for example for the Food area with appropriate barrier layers.
- the molded part was also produced using an effective and flexible manufacturing process that is environmentally friendly and degradable.
- the functional layer or the layer system comprises a barrier layer which is or comprises preferably a wax layer, a lacquer layer and / or a ceramic layer, particularly preferably an SiOx layer or a glass ceramic layer.
- the molded part comprises a first molded part made of the fiber material made of a first pulp and a second molded part as a functional layer made of a fiber material made of a second or further pulp that differs from the first pulp, the first and second molded parts facing each other via their respective Surfaces are connected to one another, preferably due to the prepress pressure in preforms.
- the functional layer and / or the layer system of several functional layers are arranged on an outer surface and / or an inner surface of the molded part consisting of a first pulp and / or second or further pulp.
- the molded part is a container for food and the inner surface is coated with a layer of wax approved as a food additive, of varnish approved for food, of PTFE or with an SiOx layer.
- the inner surface is the surface that faces the food in the molded part.
- Fig.l a schematic representation of an embodiment of the invention
- suction tool 6 an embodiment of the suction tool as a multi-tool using the example of a single suction head with negative and positive mold (a) before the molding and (b) after the molding of the molded part;
- FIG. 9 shows an embodiment of the molded part with (a) a layer system with several functional layers and a further layer of fiber material applied to the outer surface of the molded part, and (b) an application of the molded part with applied and applied layers.
- Fig.l shows a schematic representation of an embodiment of the method 200 according to the invention for the production of molded parts 10 from environmentally compatible degradable fiber material 11 by means of a fiber molding process in a fiber molding system 100 comprising the steps of providing 210 at least one first pulp la as a liquid solution environmentally compatible degradable fiber material 11 in at least one first pulp reservoir 6a; of the molding 220 of the molded part 10 by means of at least a first partial immersion of a suction tool 2 into the first pulp la, the suction tool 2 as a multi-tool comprising a plurality of suction heads 21, each with a three-dimensionally shaped suction head suction side 21s adapted to a contour of the molded part 10 to be molded , and suction of the fiber material 11 onto the respective suction head suction sides 21s of the suction heads 21 by means of negative pressure in the suction tool 2 from the first pulp la (for further details see also FIG.
- the method 200 further comprises the step of hot pressing 240 the at least molded, here already preformed, molded part with a hot pressing pressure HD Transfer of the molded part to a hot pressing station 40 for the final shaping of the molded part 10.
- the hot pressing 240 is carried out following the preforming 230 with a pressure and temperature higher than that of the preforming 230. Thereafter, the end-formed molded part 10 is output 250.
- the production method additionally includes applying 260 a functional layer 15 or a layer system 16 made up of several functional layers 15a, 15b, 15c and / or applying 290 a further layer 15d of fiber material 11 to one Surface 10a, 10i of the molded part to be coated.
- the application 290 is part of the molding 220 and is therefore carried out here before the preforming 230 and hot pressing 240.
- the application 260 of the functional layer 15 or the layer system 16 takes place chronologically after the molding 220, since the molded part must first be present as a base (substrate) for the application 260.
- the application 260 can be carried out after the molding 220 at different times and subdivisions into sub-steps in the fiber molding process 200.
- the surface 10a, 10i to be coated can be an outer surface 10a of the molded part 10 and / or an inner surface 10i of the molded part 10.
- the application 260 comprises a conditioning 270 of the surface 10a, 10i to be coated and a subsequent coating 280 of the conditioned surface 10a, 10i to be coated.
- the surface 10a, 10i to be coated is intended to be smoothed and / or filled with material in preparation for the coating step 280 with a surface 10a, 10i.
- Material is preferably sprayed on during conditioning.
- this is Conditioning material, preferably a biocompatible material.
- the molded part 10 can be sprayed with wax, preferably with a wax approved as a food additive, and / or with varnish, preferably a varnish approved for food.
- the molded part can be coated with PTFE.
- the wax can also be applied 260 to the molded part as a functional layer 15a in the layer system 16.
- the conditioning can also be done with a different material or it can be omitted.
- the wax is preferably introduced into the fiber material 11 by means of a temperature treatment of the molded part 10, preferably in this case the wax is applied 260 before the hot pressing 240 so that the temperature during the hot pressing process leads to the wax being drawn into the fiber material.
- the steps of conditioning 270 and / or of coating 280 can, however, also be carried out after the step of hot pressing 240 if the corresponding materials or layers 15 or layer system 16 cannot withstand the temperatures during hot pressing.
- the coating 280 can also take place after the preforming 230 or the hot pressing 240 without prior conditioning 270.
- the coating 280 of the molded part 10 with the functional layer 15 or the layer system 16 is carried out, for example, using a physical coating process or a gas phase deposition, preferably vapor deposition, plasma coating or spraying.
- FIG. 2 shows a schematic representation of a further embodiment of the method 200 according to the invention.
- the embodiment shown here can be combined with the embodiment in FIG. 1, since the application 260 and the application 290 can be carried out independently of one another, since both processes are in different sections of the fiber molding process 200 take place.
- the application 290 can include the following steps, here before the preforming 230: at least partial second immersion 300 of the suction tool 2 with the molded part 10 already formed from the first pulp 1a into a second reservoir 6b with a second pulp 1b; and further molding 310 of the functional layer 15d by suction of the fiber material 11 from the second pulp reservoir 6b with second pulp 1b onto the fiber material 11 already molded from the first pulp la in the respective suction heads 21
- Process for the molded part 10 made of fiber material from the first pulp la with 310 functional layer 15d molded thereon Fiber material 11 from the second pulp 1b is then preformed 230 in the preforming station 30.
- the application 290 comprises the following steps of transferring and outputting 320 the molded part 10 formed in the suction tool as a first molded part 10-1 onto or into a clipboard, here a pre-press lower tool 31 of the pre-forming station 30, out of the suction tool 2; the at least partial second immersion 330 of the suction tool 2, which is now free of molded parts, into a further reservoir 6b with a further pulp 1b; of the molding 340 of a second molded part 10-2 as the functional layer 15d by means of suction of the fiber material 11 from the further pulp reservoir 6b with further pulp lb on the respective suction head suction sides 21s of the suction heads 21; and placing 350 of the second molded part 10-2 as the functional layer 15d on or in the first molded part 10-1.
- the suction behavior of the suction head when the second molded part 10-2 is molded on is not influenced by the molding process of the first molded part 10-1, since here the fiber material 11 for the second molded part 10-2 is sucked in through a free sieve in the suction head, and thus not through the first molded part 10-1.
- the order 290 includes the subsequent steps of at least partial second immersion 330, but here of a further suction tool 2b in a further reservoir 6b with a further pulp 1b, with the further suction tool also 2b comprises a multitude of suction heads 21 as a multi-tool, each with a three-dimensionally shaped suction head suction side 21s, which in this alternative is, however, adapted to the contour of the already transferred and dispensed molded part 10 so that first and second molded parts can be manufactured over a larger thickness range ; and the molding 340 of the second molded part 10-2 as the functional layer 15d by sucking the fiber material 11 from the further pulp reservoir 6b with further pulp lb on the respective suction head suction sides 21s of the suction heads 21 of the further suction tool 2b; and placing 350 of the second molded part 10-2 as the functional layer 15d on or in the first molded part 10-1.
- the common molded part 10 from the first and second molded part 10-1, 10-2 is preformed 230 in both alternatives in the preforming station 30 by means of the prepress pressure VD exerted on the common molded part 10.
- the first molded part 10-1 can, after transferring the output 320, depending on the application in the preforming station 30, are separately pre-pressed 235 between pre-press lower tool 31 and suction tool 2.
- This pre-pressing 235 can optionally also replace the pre-forming 230 of the common molded part 10 in some embodiments instead of supplementing it.
- the molded part 10 is arranged between a pre-press lower tool 31 and the suction tool 2 as a pre-press upper tool, preferably in this case the pre-press pressure VD is exerted on the molded part 10 with the suction tool 2.
- FIG. 3 shows an embodiment of the fiber molding system 100 according to the invention for the production of molded parts 10 from environmentally friendly degradable fiber material 11 by means of a fiber molding process comprising at least one first pulp reservoir 6a, 6b for providing 210 at least one first pulp la as a liquid solution with environmentally friendly degradable fiber material 11, a molding station 20 with a suction tool 2 attached to a movement unit 4, which as a multi-tool comprises a plurality of suction heads 21 each with a three-dimensionally shaped suction head suction side 21s adapted to a contour of the molded part 10 to be molded, and which is designed for this purpose by means of at least one first partial immersion of the suction tool 2 in the first pulp la and suction of the fiber material 11 onto the respective suction head suction sides 21s of the suction heads 21 by means of negative pressure from the first pulp la to form the molded part 10 in the suction heads 21 (for more details see Figure 6), e A preform station 30 for preforming 230 the molded part 10 by means of a
- the fiber molding system 100 is additionally designed to apply a functional layer 15 or a layer system 16 composed of several functional layers 15a, 15b, 15c and / or a further layer 15d of fiber material 11 to a surface 10a, 10i of the molded part 10 to be coated 260 and / or to be applied 290 (for further details on this see FIGS. 7-9).
- the fiber molding system 100 shown here comprises, after the preforming 230 with the preforming station 30, two continuing production lines each with the component conditioning station 70, coating station 80, hot pressing station 40, a further station (for example a printing or packaging station) and an output unit 50 the same movement unit 4 with preformed molded parts 10 are supplied.
- the movement unit is able to supply both production lines with molded parts without loss of cycle time at the output unit 50.
- the molded part 10 is arranged between a pre-press lower tool 31 and the suction tool 2 as a pre-press upper tool; the pre-press pressure VD is preferably exerted on the molded part 10 with the suction tool 2.
- the molded part is discharged from the suction tool and goes through the fiber molding process on appropriately adapted means of transport, for example multi-molds as means of transport.
- Both production lines here also have a conditioning station 70 for conditioning 270 a surface 10a, 10i to be coated and a coating station 80 for coating 280 the surface to be coated (10a, 10i, which was previously conditioned with the conditioning station 70.
- a conditioning station 70 can also be dispensed with if the molded part already has suitable surface properties for coating, which depend on the materials intended for this purpose and the desired effect of the functional layer.
- the conditioning station 70 and coating station 80 are lagging behind in the fiber molding process of the hot pressing station 40, which is advantageous, for example, for temperature-sensitive materials, whereas in the right-hand production line the conditioning station 70 in the fiber molding process is arranged before the hot pressing station 40
- the conditioning station 70 is designed as a spray station for spraying the molded part 10 with a material that smooths and / or fills the surface 10a, 10i, preferably a biocompatible material, particularly preferably wax and / or lacquer, this material can be hot-pressed 240 into the fiber material 11 move in.
- the conditioning station 70 can also be designed for coating the molded part 10 with PTFE, regardless of its location in the fiber molding process.
- the coating station 80 can be designed to carry out a physical layering process or a gas phase deposition, preferably vapor deposition, plasma coating or spraying.
- the fiber molding line 100 here includes a second one Reservoir 6b with a second pulp 1b, in order to cover these with a second fiber layer 15d or a second molded part 10d via a partial second immersion 300 of the suction tool 2 with or without molded parts 10 already formed from the first pulp la in the suction heads 21.
- the preform station 20 comprises a pulp preparation and delivery station 35.
- the pre-press station 3 is a multi-tool with a large number of pre-press lower tools 31 is arranged at the preforming station 30 in such a way that the solution or pulp pressed out during the preforming can be caught and fed back directly to the two pulp reservoirs 6a, 6b.
- the suction tool 2 is arranged on a robot arm 4a of the movement unit 4, since the robot arm 4a can reliably approach both pulp reservoirs with the suction tool 2.
- the robot arm first dips the suction tool, for example, into the first pulp reservoir 6a, so that a molded part is formed from the first pulp. This is followed by a second immersion 330 of the suction tool 2 into the second pulp reservoir 6b, so that further fiber material from the second pulp 1b is formed on the previously molded part 10 by the suction process.
- FIG. 5 shows a further embodiment of the fiber molding system 100 according to the invention for molding common molded parts 10 from a first molded part 10-1 from a first pulp 1a and a second molded part 10-2 from a second pulp 1b using two separate movement units 4 , 4b for each of the first and second molded parts 10-1, 10-2.
- the first, second and further pulps 1a, 1b differ in their compositions, in their solvents, their fiber materials, in their concentrations and / or in proportions and / or in their type of any dopants.
- the fiber molding system 100 here comprises a second separate suction tool 2b in order to form a second molded part 10-2 from a further pulp 1b independently of a first molded part 10-2 from a first pulp la.
- the further suction tool 2b is here attached to the further movement unit 4b so that this movement unit 4b can place the second molded part 10-2 in the preforming station 30 on or in the first molded part 10-1.
- the movement unit 4 outputs the first molded part 10-1, for example, on the pre-pressing station 3, so that the second molded part 10-2 can be slipped over it with the second movement unit 4b and the further suction tool 2b.
- the moving units 4, 4b are here each robot with respective robot arms 4a on which the suction tools 2, 2b are arranged.
- FIG. 6 shows an embodiment of the suction head 21 shown here alone for a better overview in a suction tool 2 as a multi-tool with negative and positive mold (a) before the molding and (b) after the molding of the molded part in a molding station 20 for a fiber molding system 100 for Forming 220 of a molded part 10 made of environmentally friendly degradable fiber material 11.
- the forming station is further described in FIG.
- the suction tool 2 for sucking in the environmentally degradable fiber material 11 for the forming 220 of the molded part 10 from a first, second or further pulp - Reservoir 6a, 6b with a first, second or further pulp la, lb as a liquid solution with the environmentally compatible degradable fiber material 11 is to be entered, wherein the suction tool 2 comprises a suction head 21 with a three-dimensionally shaped suction head suction side 21s, which with its Shape is adapted to a contour of the later molded part 10, and the molded part 10 on the S eye head suction side 21s is formed in the suction tool 2 by means of negative pressure.
- the suction head suction side 21s of the suction head 21 is formed from a porous screen 22, on whose side facing the first, second or further pulp la, lb the environmentally compatible degradable fiber 11 adheres due to the suction for molding 220 of the molded part 10.
- the suction tool 2 comprises a large number of suction channels 23, which end on the suction-side surface below the sieve 22 and are distributed over the suction-side surface in such a way that essentially the same suction power is enabled in all areas between the sieve 22 and the suction-side surface.
- the suction channels 23 can have openings in the suction-side surface with a diameter of less than 4 mm.
- the cross-sectional area of the suction channels 23 can have any suitable shape, for example the cross-sectional area can be circular or oval.
- the suction head for forming the molded part can only dip a little bit into the first, second or further pulp la, lb so that a closed cavity is formed in the interior 21 i of the suction head. In other embodiments, the suction head 21 could also be completely immersed in the first, second or further pulp la, lb.
- the liquid solution of the first, second or further pulp 1 a, 1 b which passes through the sieve 22 during the molding 220 is discharged from the suction tool 2.
- the suction head 21 comprises on its end face 21p facing the first, second or further pulp la, lb a collecting ring for receiving the liquid solution of the first, second or further pulp la, lb sucked through the suction head suction side 21s, which is connected to a discharge channel 25 connected for the liquid solution is.
- the suction head suction side 21s of the suction head 21 can either be designed as a negative form (left part of FIG. 1) as the suction head inside 21 i or as a positive form (right part of FIG. 1) as the suction head outside 21 a. In the case of a negative mold, the molded part 10 (gray inner layer in the suction head 21, left in FIG.
- the suction head 21 furthermore comprises a gas line system 27, which forwards the provided negative pressure to the suction head 21 as suction pressure SD.
- the first, second or further pulp la, lb can have a proportion of environmentally friendly degradable fiber material 11 of less than 5%, preferably less than 2%, particularly preferably between 0.5% and 1.0%, in a liquid solution, for example an aqueous solution, contain.
- the first, second or further pulp la, lb does not include any organic binder, preferably no binder at all.
- the environmentally compatible degradable fiber material 11 can essentially consist of fibers with a fiber length of less than 5 mm.
- the first, second or further pulp la, lb is provided with a temperature of less than or equal to 80 ° C., preferably less than or equal to 50 ° C., particularly preferably room temperature.
- FIG. 7 shows an embodiment of the common molded part 10 with a second molded part 10-2 made of fiber material 11 arranged on the inside 10i of a first molded part 10-1 made of fiber material 11 made of a second different from the first pulp la of the first molded part 10-1 or further pulp 1b, the first and second molded parts 10-1, 10-2 being connected to one another via their respective surfaces facing one another.
- This connection is produced, for example, by the preform pressure VD during preforming 230.
- the surface 10a, 10i to be coated can be an outer surface 10a of the molded part 10 and / or an inner surface 10i of the molded part 10, depending on the application.
- the functional layer 15 or the layer system 16 can be or comprise a barrier layer, preferably a wax layer, a lacquer layer and / or a ceramic layer, particularly preferably an SiOx layer or a glass ceramic layer. If the molded part 10 is a container for food, the inner surface 10i is coated with a layer of wax approved as a food additive, of varnish approved for food, of PTFE or with a SiOx layer.
- FIG. 9 shows an embodiment of the molded part 10 with (a) layer system 16 applied to the outer surface 10a of the molded part 10 with several functional layers 15a, 15b, 15c and a further layer 15d of fiber material 11, and (b) an application of the molded part 10 with applied and applied layers 15, 16.
- at least one of the functional layers 15b in the layer system 16 or the further layer 15d of fiber material 11 can have an at least partial barrier effect against material transport out of the fiber material 11, into the fiber material 11 or through the fiber material 11 has through it, preferably the barrier effect is directed against the penetration of moisture, water, aromatic substances, flavorings, odorous substances, fats, oils and light acids and / or substances not suitable for foodstuffs.
- the functional layer 15b with a barrier effect can be a wax layer, lacquer layer or a ceramic layer, preferably an SiOx layer or a glass ceramic.
- at least one of the functional layers 15c in the layer system 16 can also be configured in such a way that, under the conditions of use of the molded part 10, it releases substances that are advantageous for an application of the molded part 10 into the surroundings of the molded part 10.
- the functional layer 15d can have a smaller layer thickness than the fiber material 11 previously formed from the first pulp la.
- the functional layer 15d of fiber material 11 can additionally comprise a portion of a material that smooths and / or fills the fiber material 11, preferably a biocompatible material. As shown in FIG.
- the molded part is a flower or plant pot, which is buried together with the plant 7 in the ground 8 and remains therein until it is broken down in an environmentally friendly manner.
- a fertilizer from the fiber material 10 is released to the soil 8, which the plant growth of the with the molding planted plant 7 supports.
- the active ingredient W can be a flavoring substance, a medicinal active ingredient, a substance which supports the environmentally compatible degradation of the molded part 10, or an additive for a content of the molded part 10.
- the inner surface 10i (not shown here) can be coated with a layer of wax approved as a food additive, of varnish approved for food, of PTFE or with a SiOx layer.
- Fiber material, fiber molding process 210 Providing at least a first pulp
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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Dry Formation Of Fiberboard And The Like (AREA)
- Application Of Or Painting With Fluid Materials (AREA)
Abstract
Description
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Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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DE102019127560.1A DE102019127560A1 (en) | 2019-10-14 | 2019-10-14 | FIBER MOLDING LINE FOR THE PRODUCTION OF MOLDED PARTS FROM ENVIRONMENTALLY COMPATIBLE DEGRADABLE FIBER MATERIAL |
PCT/DE2020/000228 WO2021073672A1 (en) | 2019-10-14 | 2020-10-01 | Fibre-moulding facility for producing moulded parts made of fibre material degradable in an environmentally friendly fashion |
Publications (2)
Publication Number | Publication Date |
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EP4045710A1 true EP4045710A1 (en) | 2022-08-24 |
EP4045710B1 EP4045710B1 (en) | 2023-06-14 |
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EP20799969.9A Active EP4045710B1 (en) | 2019-10-14 | 2020-10-01 | Fibre-moulding facility for producing moulded parts made of fibre material degradable in an environmentally friendly fashion |
Country Status (5)
Country | Link |
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US (1) | US20240200278A1 (en) |
EP (1) | EP4045710B1 (en) |
CN (1) | CN114585782A (en) |
DE (1) | DE102019127560A1 (en) |
WO (1) | WO2021073672A1 (en) |
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DE102019127562A1 (en) * | 2019-10-14 | 2021-04-15 | Kiefel Gmbh | FIBER MOLDING LINE FOR THE PRODUCTION OF MOLDED PARTS FROM ENVIRONMENTALLY COMPATIBLE DEGRADABLE FIBER MATERIAL |
DE102022124328A1 (en) | 2022-09-22 | 2024-03-28 | Kiefel Gmbh | Process and manufacturing system for producing workpieces from fiber material |
DE102022124327A1 (en) | 2022-09-22 | 2024-03-28 | Kiefel Gmbh | Cleaning system and cleaning method, as well as production device for workpieces |
DE102022124331A1 (en) | 2022-09-22 | 2024-03-28 | Kiefel Gmbh | Weighing system, manufacturing device and method for operating a manufacturing device for workpieces |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3234080A (en) * | 1963-08-12 | 1966-02-08 | Diamond Int Corp | Pulp molding apparatus for forming plural-ply articles |
US3401079A (en) * | 1965-07-15 | 1968-09-10 | Diamond Int Corp | Pulp molding |
DE4008862C1 (en) | 1990-03-20 | 1991-04-11 | Friedrich 2807 Achim De Priehs | |
CA2057474A1 (en) * | 1991-08-21 | 1993-02-22 | Gordon William Spratt | Process for forming paper-based products having cement-based coatings |
DE9410034U1 (en) * | 1994-06-24 | 1994-08-04 | Emrich, Dirk, 51709 Marienheide | Cardboard packaging with content protection against infestation by vermin |
DE19618554A1 (en) * | 1996-05-09 | 1997-11-27 | Lothar Ruehland | Shaped part consisting of straw fibers, paper fibers and a binder and method for producing such a shaped part |
SE1850921A1 (en) * | 2018-07-19 | 2020-01-20 | Celwise Ab | Laminated structure and method of its production |
-
2019
- 2019-10-14 DE DE102019127560.1A patent/DE102019127560A1/en active Pending
-
2020
- 2020-10-01 WO PCT/DE2020/000228 patent/WO2021073672A1/en active Search and Examination
- 2020-10-01 US US17/754,820 patent/US20240200278A1/en active Pending
- 2020-10-01 CN CN202080072231.7A patent/CN114585782A/en active Pending
- 2020-10-01 EP EP20799969.9A patent/EP4045710B1/en active Active
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WO2021073672A1 (en) | 2021-04-22 |
CN114585782A (en) | 2022-06-03 |
EP4045710B1 (en) | 2023-06-14 |
US20240200278A1 (en) | 2024-06-20 |
DE102019127560A1 (en) | 2021-04-15 |
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