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WO2018033209A1 - Procédé de fabrication d'un articule moulé à partir d'une pâte, article moulé fait de pâte et appareil de fabrication d'un tel article moulé - Google Patents

Procédé de fabrication d'un articule moulé à partir d'une pâte, article moulé fait de pâte et appareil de fabrication d'un tel article moulé Download PDF

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Publication number
WO2018033209A1
WO2018033209A1 PCT/EP2016/069611 EP2016069611W WO2018033209A1 WO 2018033209 A1 WO2018033209 A1 WO 2018033209A1 EP 2016069611 W EP2016069611 W EP 2016069611W WO 2018033209 A1 WO2018033209 A1 WO 2018033209A1
Authority
WO
WIPO (PCT)
Prior art keywords
pulp
mold
holding means
molded article
article
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.)
Ceased
Application number
PCT/EP2016/069611
Other languages
English (en)
Inventor
Olaf Starken
Gian Armand Juliana De Belder
Wiebke VAN DER VEEN
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.)
Mayr Melnhof Karton AG
Original Assignee
Mayr Melnhof Karton AG
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 Mayr Melnhof Karton AG filed Critical Mayr Melnhof Karton AG
Priority to PCT/EP2016/069611 priority Critical patent/WO2018033209A1/fr
Publication of WO2018033209A1 publication Critical patent/WO2018033209A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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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
    • D21J3/10—Manufacture of articles by pressing wet fibre pulp, or papier-mâché, between moulds of hollow bodies
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C41/00—Shaping by coating a mould, core or other substrate, i.e. by depositing material and stripping-off the shaped article; Apparatus therefor
    • B29C41/02—Shaping by coating a mould, core or other substrate, i.e. by depositing material and stripping-off the shaped article; Apparatus therefor for making articles of definite length, i.e. discrete articles
    • B29C41/04—Rotational or centrifugal casting, i.e. coating the inside of a mould by rotating the mould
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D23/00—Details of bottles or jars not otherwise provided for
    • B65D23/10—Handles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D23/00—Details of bottles or jars not otherwise provided for
    • B65D23/10—Handles
    • B65D23/104—Handles formed separately
    • B65D23/106—Handles formed separately the gripping region of the handle extending between the neck and the base of the bottle or jar and being located in a radial plane comprising the axis of the bottle or jar

Definitions

  • the invention relates to a method for manufacturing a molded article from pulp. Moreover, the invention relates to a molded article made of pulp and an apparatus for manufacturing such a molded article.
  • Pulp articles such as containers for containing liquids and/or solids are well-known in the art. In order to make these containers fit for purpose to contain liquids and/or solids (such as - but not limited to - liquid tightness, product packaging compatibility, etc.), they typically contain one or more inner coating(s) and/or an inner plastic bag(s) for containing the content (hybrid pack where plastic bag is contained in a pulp clamshell). Both methodologies involve more than one step. This invention aims to make pulp containers in an easier process, in particular in one process only, allowing to produce such articles at higher conversion speeds (and therefore in a more economical way).
  • EP 2 524 876 B1 shows a blow molded article for containing at least 1 .5 liters of a detergent composition, the article comprising a body having a top and a bottom. The article further comprises an opening proximal to said top. Moreover, the article comprises a non-through holding means integrally located on at least one said body and positioned between said top and said bottom.
  • the known blow molded articles are made of plastic resin material. The different types of plastic packaging have several disadvantages associated with their raw materials and their recycling possibilities.
  • US 4 846 359 A1 shows a multi-layered plastic bottle having a body and a through holding means formed by a handle element which, on both of its ends, is connected to the body thereby forming the through holding means as a closed through holding means.
  • WO 2009/153558 A1 discloses a container made of pulp comprising a hollow shell including a dispensing aperture and a bag or liner provided within the hollow shell. Further, the container comprises a handle portion. The hollow shell includes two portions that are joined by an interconnecting hinge or web. When the hollow shell is in an open configuration, said two portions lay side by side.
  • WO 2009/133355 A1 discloses a method of forming such a container.
  • a disadvantage of such known container is the fact, that there always remain lateral edges at the interconnecting zone between the two portions of the hollow shell. This leads to a poor visual appearance and a poor haptic appearance of the surface of the molded article.
  • WO 2012/139590 A1 discloses an apparatus for producing a container defining a container geometry, the apparatus comprising a frame comprising a base supporting at least one mold, the mold including an opening, a pulp material feeding device configured to reciprocally enter the mold via the opening, a pulp reservoir in communication with the pulp material feeding device, the pulp reservoir configured to hold a pulp material, a pulp pressure reservoir configured to provide pressure so as to deliver the pulp material from the pulp reservoir via the pulp material feeding device to the at least one mold, an expandable device configured to be inserted into the at least one mold via the opening, wherein the expandable device have a geometry corresponding to the container geometry.
  • a first aspect of the present invention relates to a method for manufacturing a molded article from pulp, wherein the article comprises at least one article body.
  • the method according to the present invention comprises a first method step of introducing pulp into a mold, wherein the mold comprises at least one first cavity for forming said article body.
  • the method according to the present invention further comprises a second method step of, after the first method step, rotating and/or shaking the mold so as to coat at least a portion of the inside of the mold with the pulp thereby forming walls of the article body.
  • a second method step of, after the first method step, rotating and/or shaking the mold so as to coat at least a portion of the inside of the mold with the pulp thereby forming walls of the article body.
  • rotating and/or shaking the mold while the mold contains the pulp inner walls of the mold are coated with the pulp contained in the mold.
  • said inner walls bound or form at least a portion of the first cavity.
  • said inner walls are used to form the pulp thereby forming the article body.
  • At least one means is used to keep pulp in place while the mold is rotated and/or shaken.
  • said means is a vacuum or a vacuum action by means of which the pulp can be kept in place while rotating and/or shaking the mold containing the pulp, so that, for example, at least a portion of the mold is evacuated to create said vacuum
  • the mold comprises at least one second cavity for forming at least one holding means to said article body, the method comprising, after the step of introducing the pulp into the mold: rotating and/or shaking the mold so as to coat at least a portion of the inside of the mold with the pulp thereby forming walls of the article body and the holding means.
  • the method further comprises a method step of forming said molded article with said holding means within the mold.
  • both the article body and the holding means are manufactured from said pulp.
  • the article body and the holding means are formed in one piece. For example, said inner walls bound or form at least a portion of the first cavity and/or the second cavity.
  • said inner walls are used to form the pulp thereby forming the article body and/or the holding means.
  • a second element or a second composition acting as a barrier can be introduced into the mold and applied to the pulp arranged in the mold, in particular before cooling down and demolding the pulp or the molded article.
  • the second element is introduced into the mold after the pulp is introduced into the mold and after rotating and/or shaking the mold containing the pulp
  • the second element or composition is introduced into the mold.
  • the mold is rotated and/or shaken again so as to rotate and/or shake the pulp and the second composition which are both contained in the mold so as to coat the pulp contained in the mold, in particular so as to coat inner walls of the pulp contained in the mold with the second composition or element.
  • the pulp contained in the mold is dewatered and, thus, dried.
  • the pulp is pressed or compressed.
  • said vacuum applied to the mold is dewatering the pulp.
  • the pulp contained in the mold is heated and, thus, dewatered or dried.
  • the pulp can be dried at least partially, in particular completely.
  • both a particularly advantageous visual appearance and a particularly advantageous feel, in particular surface feel, of the molded article can be realized since ridges and edges impairing the visual appearance and the feel of the molded article can be avoided.
  • conventional molded articles made of pulp formed by at least two hollow shells connected with each other have ridges and/or edges which result from respective methods for manufacturing said conventional molded articles. Such ridges and edges impair both the visual appearance and the feel of the respective conventional molded article.
  • the article body and/or the holding means is made of pulp material such ridges and edges can be avoided.
  • the use of a renewable, biodegradable and/or recyclable raw material, namely pulp is particularly advantageous in contrast to other raw materials like plastics.
  • the article body and/or the holding means are integrally formed. Moreover, preferably, the article body and the holding means are formed in one piece.
  • integrally formed means that the article body and/or holding means is formed as one piece, preferably in one production step.
  • a fourth method step might be provided.
  • the fourth method step comprises at least - but not limited to- applying a coating internally and/or externally by techniques known by those skilled in the art.
  • Another alternative coating means would be to apply a coating composition before demolding the molding article, and apply once more a rotomolding operation. This means that, for example, an inner surface and/or an outer surface of the molded article can be coated by at least one coating which is used as, for example, a barrier to protect the pulp and/or the medium from environmental influences.
  • said holding means is a handle or grip by means of which the molded article can be handled by a person in a convenient and preferred way.
  • the person can grasp the holding means by means of at least one or more of their fingers so that the person can move the molded article via the holding means.
  • the person can grasp and, thus, handle the article body by means of at least one hand.
  • a person grasping and, thus, touching the holding means and/or the article body of the conventional molded article can feel at least one edge of the conventional molded article so that the feel, in particular the surface feel, of the conventional molded article is impaired by said edge.
  • the molded article is a consumer good and/or product or configured to contain at least one consumer good and/or product.
  • the molded article manufactured by the method according to the present invention can be handled, i.e. moved particularly easily since the molded article has said holding means which can be grasped by a person.
  • the molded article is a container such as a bottle, said container being configured to contain a medium, in particular a solid and/or a liquid.
  • a medium in particular a solid and/or a liquid.
  • said liquid can be water, a detergent composition or a different liquid.
  • said medium is a consumer good which can be stored in the article.
  • the molded article has a capacity of at least 25 milliliters, in particular at least 0.5 liter and preferably at least 1 .5 liters, for storing said medium.
  • said solid can be a powder or a product comprising, for example, granulate and/or solid beads.
  • the medium be in any physical form including solid, liquid, gel or paste.
  • an ergonomic and sensorial advantage over conventional molded articles can be realized since particularly advantageous sensorial elements or features such as softness, appearance etc. can be realized.
  • the method allows to use renewable and secondary raw materials, e.g. recycled material to manufacture the molded article. Further advantages are: providing easier end-of-life options (mono-component package to allow easy recycling, biodegradable packages pending final composition, etc.), and enabling the consumer benefit of an easier handling of large containers by means of holding means which can be made of advantageous raw material which is easy to recycle.
  • the holding means comprises an insertion direction in which a person can insert at least one of their fingers or thumb into the holding means so as to grasp the holding means.
  • the holding means can be configured as a through holding means which is also referred to as an open handle, open grip or through handle.
  • the through holding means is not limited in said insertion direction so that, for example, the through holding means comprises at least one through opening or gripping aperture through which a person can put at least one of their fingers.
  • the holding means can be grasped all around with respect to the circumferential direction of the holding means.
  • the term "through handle” or “open handle” refers to any handle through which a person can put one or more fingers to allow an easy handling hence improving convenience during SMOT (in- use phase).
  • the holding means can be configured as a non-through holding means which is also referred to as a closed handle or closed grip.
  • a non-through holding means is limited in the insertion direction by, for example, at least one wall of the molded article.
  • the non-through holding means comprises opposing depressions or receptacles which are arranged on both sides of said wall.
  • the opposing depressions or receptacles are separated from one another by the wall so that the holding means is configured as a non-through holding means.
  • said wall is not present thereby forming a completely opened space through which fingers and/or a thumb can be inserted.
  • the open or through holding means can be completely closed in its longitudinal extension so that, for example, at least one handle element of the holding means is connected to the article body at both ends.
  • Such an open handle is, for example, also referred to as a two-side connected open handle.
  • the through or open holding means can be open with respect to its longitudinal extension so that a first end of said handle element is connected to the article body and the other end of the handle element is arranged at a distance from the article body.
  • Such an open handle is also referred to as a one-side connected open handle.
  • the holding means By means of the holding means the consumer benefit of a particularly easy handling of the molded article can be realized, especially when the molded article is a large container, wherein the molded article can be made of an advantageous raw material which is easy to recycle.
  • the holding means can be formed by a recess in the mold thereby forming the holding means as a small grip feature.
  • at least one boxing mold in which the grip area is somewhat deeper can be used.
  • the method step of rotating the mold is a method step of a rotomolding process by means of which at least a portion of the article body and/or the holding means is formed.
  • the pulp within the mold is caused to disperse and stick to wall portions of the mold, i.e. to at least a portion of the inside of the mold.
  • said wall portions bound the first and/or second cavities at least partially.
  • the mold is rotated about at least two rotation axes which extend angularly to each other.
  • the rotation axes extend at least substantially perpendicularly to each other.
  • said pulp can be a pulp slurry.
  • said pulp is configured as or comprises a paper pulp being, for example, a lignocellulosic fibrous material prepared by, for example, chemically and/or mechanically separating cellulose fibers from wood, fiber crops or paper, in particular waste paper.
  • the pulp is configured as or comprises starch or foamed starch.
  • a particularly low roughness of the article's surface can be realized by means of the method according to the present invention, wherein, for example, the roughness is in a range from 0.5 micrometer to 20 micrometers.
  • the roughness is in a range from 0.5 micrometer to 20 micrometers.
  • the pulp can comprises fibers or fiber solids such as, e.g. natural fibers, natural bamboo fibers and/or straw fibers and/or coconut fibers and/or synthetic fibers such as plastic fibers and/or treated fibers and/or untreated fibers and/or nano-cellulose.
  • said treated fibers are fibers which are treated in such a way so that said treated fibers are waterproof and/or water-resistant.
  • the pulp is a fibrous pulp comprising at least one of the aforementioned kinds of fibers.
  • the pulp can comprise at least one or a plurality of additives.
  • the molded article can be configured as a liquid-tight container by introducing an inner bag made out of plastic into the article body and/or the holding means, the inner bag acting, for example, as the afore-mentioned barrier.
  • the mold is heated while containing the pulp.
  • the pulp contained in the mold is heated and, thus, dried.
  • the extent of moisture contained in the pulp can be at least reduced.
  • the mold and, thus, the pulp contained within the mold are heated while the mold is rotated and/or shaken and/or after rotating and/or shaking the mold.
  • the mold continues to rotate and/or shake at all times during heating the mold so as to avoid sagging or deformation also during a possible subsequent cooling phase.
  • an at least substantially even wall thickness of the article body and/or the holding means can be realized.
  • the mold is cooled while containing the pulp.
  • the pulp contained in the mold is cooled.
  • the mold and, thus, the pulp are cooled after rotating and/or shaking the mold contained in the pulp.
  • the process of cooling the mold and, thus, the pulp contained in the mold is conducted while the mold is rotated and/or shaken.
  • the mold is cooled after heating the mold.
  • the molded article can be released from the mold particularly easily so that both, a particularly advantageous visual appearance and a particularly advantageous feel of the molded article can be realized.
  • the roughness of the mold, the composition of the pulp and/or additives in the pulp can be used as additional means to influence sensorial elements such as - but not limited to - softness of the molded article.
  • the mold is part of an apparatus for manufacturing the molded article, the apparatus comprising at least one cooling element for cooling the mold and, thus, the pulp contained in the mold.
  • the cooling element comprises at least one duct which is, for example, configured as a cooling duct through which a cooling medium such as a cooling fluid, in particular a cooling liquid can flow.
  • the duct extends in the mold.
  • said cooling medium is conveyed through the duct.
  • said apparatus comprises at least one heating element for heating the mold and, thus, the pulp contained in the mold.
  • said heating element is configured as an electrical heating element which can be arranged in the mold at least partially.
  • said heating element can comprise at least one duct through which a heating medium such as a heating fluid, in particular a heating liquid can flow so that the mold and, thus, the pulp contained in the mold can be heated by said heating medium.
  • said duct for heating the mold can be used as said duct for cooling the mold so that, for example, the same duct can be used for heating and cooling the mold.
  • the heating medium is conveyed through the duct which, for example, extends at least partially in the mold.
  • the article body and/or the holding means is equipped with at least one layer which is, for example, made of a material different from the pulp.
  • said layer is made of a plastic material.
  • said layer can act as a barrier or barrier for protecting the pulp and/or the medium contained in the molded article from environmental influences.
  • an outer surface and/or an inner surface of the article body and/or the holding means is at least partially coated with said layer.
  • the surface is coated with the layer by rotomolding, i.e. by rotating and/or shaking the mold, in particular before cooling down and demolding the molded article.
  • said layer is formed by said second element or second composition described above.
  • the molded article is removed from the mold, wherein, before or after removing the molded article from the mold, i.e. before or after demolding the molded article, the molded article is equipped with said layer which, for example, can act as a barrier coating.
  • the second cavity is filled with a prefabricated holding means or with at least one part of a prefabricated holding means, in particular before filling the first cavity with the pulp.
  • a particular high stiffness of the holding means can be realized.
  • the holding means or at least one part of the holding means is provided as said prefabricated component which is inserted into the second cavity.
  • the prefabricated component is a component which is fabricated or manufactured independently of the article body, in particular before or after the article body is manufactured.
  • the prefabricated component is formed and, thus, connected to the article body within the mold.
  • the pulp for forming the article body is brought into contact with at least one portion of the prefabricated component arranged in the second cavity within the mold.
  • the article body is connected to the prefabricated component, in particular while the article body is manufactured from the pulp.
  • the pulp for forming the article body and, thus, the article body is brought into contact with the prefabricated component by rotating and/or shaking the mold.
  • the mold is rotated and/or shaken after introducing the prefabricated component into the second cavity.
  • the pulp within the mold is dried, in particular until a predefined amount of moisture of the pulp is reached.
  • the pulp is not completely dry, but adequately wet or humid so that, for example, the pulp can be formed in a need-based manner.
  • the pulp is dried by heating the mold and, thus, the pulp.
  • a compression device is used to dewater and, thus, dried the pulp at least partially.
  • the compression device is introduced into the mold.
  • the compression device is, for example inflated and, thus, expanded thereby pressing the pulp contained in the mold against inner walls of the mold and/or compressing the pulp.
  • the mold comprises or is made of a permeable material through which the moisture from the pulp can escape.
  • the pulp contained in the mold can be dewatered and, thus, dried by means of a vacuum.
  • at least a portion of the mold is evacuated or set under a vacuum by means of which moister can be withdrawn from the pulp.
  • the mold is permeable or made of a permeable material so that moisture can be sucked out of the pulp by means of the vacuum.
  • the pulp for forming the holding means is pushed to the inside of the mold after the method step of drying the pulp.
  • the pulp is further dried within the mold after pushing the pulp for forming the holding means to the inside of the mold.
  • At least one portion of the pulp for forming the holding means is punched out so as to create the holding means as a through holding means.
  • at least one through opening of the holding means can be realized thereby forming a completely open space through which a person grasping the holding means can insert their fingers and/or thumb so that the person can grasp and handle the molded article in a particularly comfortable way.
  • the pulp for forming the holding means is punched out by means of at least one mechanical action such as pinching and/or drilling and/or cutting and/or laser cutting etc.
  • the pulp for forming the holding means is compressed and shaped, in particular after forming the holding means.
  • a defined geometry of the holding means can be created in a need-based manner.
  • the pulp for forming the holding means is compressed, shaped and dried so that the pulp can be dried particularly fast.
  • the pulp for forming the holding means is compressed and shaped by means of at least one heated tool so that, for example, the pulp can be shaped and dried at the same time.
  • the mold comprises at least two mold parts which, after rotating and/or shaking the mold, are moved away from each other to release the molded article from the mold.
  • the molded article can be removed from the mold in a particularly advantageous way so that both a particularly good visual appearance and a particularly good surface feel of the molded article can be realized.
  • a second aspect of the present invention relates to a molded article made of pulp wherein the molded article according to the present invention comprises at least one integrally formed article body.
  • the molded article comprises at least one holding means formed with the article body.
  • Advantages and advantageous embodiments of the first aspect of the present invention are to be regarded as advantages and advantageous embodiments of the second aspect of the present invention and vice versa.
  • the inventive molded article has a particularly advantageous visual appearance and a particularly advantageous feel, in particular surface feel, since there are no ridges and edges impairing the visual appearance and the feel of the molded article as at least the article body is, preferably, integrally formed.
  • conventional molded articles made of pulp have ridges and/or edges which result from respective methods for manufacturing said conventional molded articles.
  • the article body and/or the holding means are integrally formed such ridges and edges can be avoided.
  • the use of a renewable, biodegradable and/or recyclable raw material, namely pulp, is particularly advantageous compared to other raw materials like plastics.
  • the article body and/or the holding means are integrally formed.
  • the article body and the holding means are formed in one piece.
  • integralally formed means that the article body and/or holding means is formed as one piece, preferably in one production step.
  • the molded article is manufactured by a method according to the present invention.
  • the holding means is formed in one piece with the article body so that both, the article body and the holding means are manufactured from said pulp.
  • the holding means is configured as a prefabricated component manufactured independently of the article body, the prefabricated component being connected to the article body.
  • the prefabricated component can be made of paper, plastics, rubber, etc. or a combination thereof.
  • said holding means, in particular the prefabricated component is manufactured from paper pulp for environmental and recycling advantages.
  • said holding means is a through holding means or a non- through holding means.
  • the holding means comprises an at least partially hollow and/or massive form.
  • the holding means can comprise an at least partially structured gripping surface. Examples for suitable holding means are disclosed for example in EP 2 524 876 B1 and US 4 846 359 A1 . Further improvements in aesthetics and softness can be achieved through proper selected pulp raw materials and/or additives.
  • a third aspect of the present invention relates to an apparatus for manufacturing a molded article made of pulp, in particular a molded article according to the present invention.
  • the apparatus is used in a method according to the present invention, wherein the apparatus comprises said mold having at least the first cavity. Moreover, the apparatus comprises means for rotating and/or shaking the mold.
  • Advantages and advantageous embodiments of the first and second aspects of the present invention are to be regarded as advantages and advantageous embodiments of the third aspect of the present invention and vice versa.
  • the drawings show in: a schematic view of a first embodiment of an inventive method for manufacturing a molded article from pulp, wherein the article comprises at least one article body; a schematic view of a second embodiment of the method according to the invention; a schematic view of a third embodiment of the method according to the invention; a schematic front view of a first embodiment of the molded article according to the invention; a schematic front view of a second embodiment of the molded article according to the invention; a schematic front view of a third embodiment of the molded article according to the invention; a schematic view of fourth embodiment of the method according to the invention; a schematic view of a fifth embodiment of the method according to the invention; a schematic view of a sixth embodiment of the method according to the invention; a schematic view of a seventh embodiment of the method according to the invention; and a schematic front view of a fourth embodiment of the molded article according to the invention;
  • the same elements or elements having the same functions are indicated by the same reference signs.
  • Fig. 1 shows in a schematic view a first embodiment of a method for manufacturing a molded article 10 (see Figs. 4 to 6 and 1 1 ) from pulp.
  • the molded article 10 is, at least partially, made of pulp so that the molded article 10 is a pulp molded article.
  • the molded article 10 is a container in the form of a bottle comprising at least one receiving space for receiving or storing a medium, in particular a solid and/or liquid such as a gel or a paste.
  • the molded article 10 has a capacity of at least 25 milliliters, in particular of at least 0.5 liters and preferably of at least 1 .5 liters, for storing said medium.
  • the molded article 10 comprises at least one article body 12.
  • the molded article 10 comprises at least one holding means 14 connected to the article body 12.
  • the molded article 10 does not comprise the holding means 14.
  • the article body 12 and the holding means 14 are configured as separate components which are connected with each other.
  • both the article body 12 and the holding means 14 are made of pulp.
  • the article body 12 is integrally formed.
  • the article 10 is integrally formed, wherein the article body 12 and the holding means 14 are formed in one piece.
  • said the pulp is a slurry which is also referred to as a pulp slurry.
  • said pulp is or comprises a paper pulp being, for example, a lignocellulosic fibrous material prepared by, for example, chemically and/or mechanically separating cellulosic fibers from wood, fiber crops or paper, in particular waste paper.
  • the paper slurry contains at least pulp fiber having an average fiber length of 0.4 to 8.0 millimeters (mm), preferably 0.4 to 4.0 mm.
  • the pulp can contain further fibers such as, for example, nano-fibers which are shorter.
  • the pulp is a fibrous pulp comprising fibers.
  • the pulp comprises synthetic fibers and/or natural fibers.
  • the pulp can comprise cellulose fibers and/or plastic fibers and/or coconut fibers and/or bamboo fibers and/or treated fibers and/or untreated fibers and/or nano-cellulose and potentially at least one or a plurality of additives such as starch.
  • the article body 12 comprises or bounds said receiving space for containing said medium.
  • the holding means 14 comprises or bounds a second receiving space for storing a medium, in particular a liquid.
  • the receiving spaces are fluidically connected with each other.
  • the article body 12 comprises at least one inlet 16 having at least one inlet opening which cannot be seen in the figures. Said inlet opening opens into said receiving space bound by the article body 12 so that said receiving space bound by the article body 12 can be filled with said medium via said inlet opening.
  • a cap 18 is connected to the inlet 16 so that said inlet opening is closed by the cap 18.
  • the cap 18 is reversibly connected to the inlet 16 which means that the cap 18 can be attached to and detached from the inlet 16 in a non-distractive way so that the inlet opening can be closed and opened by the cap 18 in a need-based manner.
  • a tool 20 is used for manufacturing the molded article 10.
  • the tool 20 comprises at least one tool element 22.
  • the tool 20 comprises at least two tool elements.
  • the tool 20 is or forms or is part of an apparatus for manufacturing the molded article 1 0, wherein said apparatus is used in said method.
  • the tool 20 comprise at least one mold 24 which, for example, comprises said at least two tool elements which are also referred to as mold parts.
  • the mold 24 is used to manufacture and form both the molded article 10 and the holding means 14 from pulp 26.
  • a first method step S1 the pulp 26 is introduced into the mold 24.
  • the mold 24 comprises at least one first cavity 28 for forming said article body 12 from the pulp 26.
  • the mold 24 comprises at least one second cavity 30 for forming the holding means 14 to the article body 12.
  • the second cavity 30 is used to form the holding means 14 from the pulp 26.
  • the pulp 26 is introduced into the first cavity 28 by at least one introducing means 31 .
  • the pulp 26 can be introduced into the second cavity 30.
  • the introducing means is fluidically connected to a pulp source (not shown).
  • a second method step S2 the mold 24 containing the pulp 26 is rotated so as to coat at least a portion of the inside of the mold 24 with the pulp 26 thereby forming walls of the article body 12 and the holding means 14.
  • the second method step S2 succeeds the first method step S1 so that the mold 24 containing the pulp 26 is rotated after introducing the pulp 26 into the mold 24. Since, by means of the mold 24 and by rotating the mold 24, both the article body 12 and the holding means 14 are manufactured, in a third method step S3 the molded article 10 is formed with said holding means 14 within the mold 24. Moreover, in the first embodiment, the holding means 14 is formed in one piece with the article body 12.
  • first inner walls or first inner wall portions of the mold 24 are coated with the pulp 26, said first inner walls or first inner wall portions bounding the first cavity 28 at least partially.
  • first inner walls or first inner wall portions bounding the first cavity 28 at least partially.
  • second inner walls or second inner wall portions of the mold 24 are coated with the pulp 26, wherein said second inner walls or second inner wall portions form or bound the second cavity 30 at least partially.
  • second inner walls or second inner wall portions walls of the holding means 14 are formed.
  • both the article body 12 and the holding means 14 are formed as hollow components so that both the article body 12 and the holding means 14 have receiving spaces for receiving a medium respectively, wherein said receiving spaces are fluidically connected with each other.
  • said walls of the article body 12 comprise an inner surface 64 bounding a first receiving space of the article body 12, wherein said medium can be stored in the first receiving space.
  • said walls of the article body 12 have an outer surface 66.
  • said walls of the holding means 14 have an inner surface 68 bounding a second receiving space of the holding means 14 so that said medium can be stored in the second receiving space. Additionally, said walls of the holding means 14 have an outer surface 70. Moreover, the receiving spaces are fluidically connected with each other so that the medium contained the first receiving space can flow from the first receiving space into the second receiving space and vice versa.
  • the holding means 14 is hollow or configured as a hollow component having the second receiving space for storing at least a portion of said medium.
  • the mold 24 is shaken thereby coating the inner walls of the mold 24 with the pulp 26.
  • the mold 24 is 24 or set under a vacuum so that the pulp 26 is sticking more easily to the mold 24, in particular to inner walls of the mold 24, and so that the pulp 26 can be dewatered, said inner walls bounding the cavity 28 and/or the cavity 30.
  • the mold 24 comprises or is made of a permeable material through which the moisture from the pulp 26 can escape when, for example, rotating and/or shaking the mold 24.
  • the moisture of the pulp 26 can be withdrawn as illustrated by arrows in Fig. 1 , steps S2, S3.
  • the moisture of the pulp 26 is withdrawn by means of said vacuum.
  • the mold 24 is permeable or made of a permeable material so that moisture can escape and/or be sucked out of the pulp 24 by means of the vacuum as illustrated by the arrows pointing to the outside of the mold 24 in Fig. 1 , steps S2, S3.
  • said vacuum is used to keep the pulp 26, in particular its fibers, in place while rotating and/or shaking the mold 24.
  • the mold 24 and, thus, the pulp 26 contained in the mold 24 are heated which is illustrated by a schematically shown thermometer 32 and a corresponding arrow 34.
  • the mold 24 and, thus, the pulp contained within the mold 24 are heated while the mold 24 is rotated.
  • said inside of the mold 24 is at least substantially evenly coated with the pulp 26.
  • an at least substantially even wall thickness of both the article body 12 and the holding means 14 can be realized.
  • At least one compressing device can be introduced into the mold, in particular after introducing the pulp 26 into the mold 24 and before or after shaking and/or rotating the mold 24.
  • the compression device is an inflatable device which, when arranged in the mold 24, is inflated and, thus, expanded thereby pressing or compressing the pulp 26 in the mold 24.
  • the pulp 26 contained in the mold 24 is pressed against the inner walls of the mold 24 by means of the inflated compression device.
  • the pulp 26 is dewatered and, thus, dried at least partially.
  • the pulp 26 is dried completely.
  • the mold 24 containing the pulp 26 and, thus, the pulp 26 are cooled which is illustrated by the thermometer 32 and a corresponding arrow 36.
  • said apparatus comprises at least one heating element configured to heat the mold 24 and, thus, the pulp 26 contained in the mold 24.
  • said heating element is configured as an electrically heating element which can be arranged in the mold 24 at least partially.
  • said heating element comprise at least one duct through which a heating medium such as a heating liquid can flow so that the mold 24 and the pulp 26 contained in the mold 24 can be heated by said heating medium.
  • a heating medium such as a heating liquid
  • said duct can be used as a heating duct.
  • said apparatus can comprise at least one cooling element for cooling the mold 24 and, thus, the pulp 26 contained in the mold 24.
  • the cooling element comprises at least one duct which is, for example, configured as a cooling duct through which a cooling medium such as a cooling liquid can flow.
  • the respective duct can extend in the mold 24.
  • said cooling duct can be the afore-mentioned heating duct so that the same duct can be used for heating and cooling the mold 24.
  • said heating medium is conveyed through the duct.
  • the holding means 14 can be manufactured from at least one prefabricated component which, for example, is manufactured independently of the article body 12.
  • the prefabricated component is inserted into the second cavity 30, in particular before rotating the mold 24.
  • the prefabricated component can be inserted into the cavity 30 after rotating the mold 24.
  • the pulp 26 contained in the cavity 28 can come into contact with the prefabricated component arranged in the cavity 30.
  • the pulp 26 contained in the cavity 28 can be brought into contact with the prefabricated component arranged in the cavity 30 by rotating the mold 24 while the pulp 26 is contained in the first cavity 28 and the prefabricated component is contained in the second cavity 30.
  • the prefabricated component can be connected to the pulp and, thus, the article body 12.
  • the article body 12 and/or the holding means 14 is equipped with at least one layer which is, for example, made of a material different from the pulp 26.
  • said layer is made of a plastic material.
  • said layer can act as a barrier for protecting the pulp 26 and/or the medium contained in the molded article 10 from environmental influences.
  • an outer surface and/or an inner surface of the article body 12 and/or the holding means 14 is at least partially coated with said layer.
  • the surface is coated with the layer by rotomolding, i.e. by rotating and/or shaking the mold, in particular before cooling down and demolding the molded article.
  • the article body 12 and/or the holding means 14 is equipped with the layer after heating the pulp 26.
  • the molded article is removed from the mold, wherein, before or after removing the molded article from the mold, i.e. before or after demolding the molded article, the molded article is equipped with said layer which, for example, can act as a barrier coating.
  • Fig. 2 shows a second embodiment of the method.
  • the second embodiment comprises a fifth method step S5 in which at least a portion of the holding means 14 or the pulp forming the holding means 14 is compressed in order to form the holding means 14.
  • at least two tool elements 38 are used.
  • the holding means 14 or the pulp 26 forming the holding means 14 is compressed and, thus, formed by means of the tool elements 38.
  • the tool elements 38 are stamps which are pressed into the pulp 26 forming the holding means 14 at least partially as illustrated by arrows 40.
  • the stamps comprise two fingers 42 respectively which are pressed into the holding means 14 or the pulp forming the holding means respectively thereby forming lateral channels 44 in the holding means 14.
  • the pulp 26 is not completely dried so that the channels 44 can be formed in a need-based manner.
  • the pulp 26 is further, in particular completely, dried so as to realize a particularly high stiffness of the molded article 10.
  • the channels 44 result in a structured surface of the holding means 14 thereby improving the grip and the haptic of the holding means 14.
  • the tool elements 38, in particular the fingers 42 are heated so that the heated finger 42 are pressed into the pulp 26 forming the holding means 14 so as to heat and, thus, dry the pulp 26 and, thus, the holding means 14 particularly fast.
  • the fingers 42 are used to create a great stiffness of the holding means 14.
  • the holding means 14 in the first embodiment, is manufactured as a through holding means which will be described in greater detail below.
  • the holding means 14 has a through opening 46 through which a person can put at least one of their fingers so that the holding means 14 can be grasped all around in its circumferential direction by the person.
  • Fig. 3 shows a third embodiment of the method.
  • the holding means 14 can be manufactured as a non-through holding means not having any through opening through which a person can put the fingers.
  • Fig. 3 shows a state Z1 of the molded article 10, wherein, in the state Z1 , the holding means 14 is configured as a non-through holding means.
  • the pulp for forming the holding means 14, in particular the non-through holding means is punched out so as to create the holding means 14 as a through holding means.
  • punching out the pulp at least a portion 48 of the pulp is separated, in particular cut, from the remaining pulp for forming the holding means 14.
  • a through opening 46 of the holding means 14 is created thereby creating the holding means 14 as a through holding means which is also referred to as an open holding means, open grip or open handle.
  • an open holding means open grip or open handle.
  • Fig. 4 shows a first embodiment of the molded article 10.
  • the holding means 14 is configured as a through holding means which is also referred to as an open handle, open holding means or open grip, wherein the holding means 14 is configured as a one-side connected open handle or a one-side connected through holding means.
  • the through holding means comprises the at least one through opening 46 a person grasping the holding means 14 can wrap their fingers completely around the holding means 14 in the area of the through opening 46.
  • the person can grasp the holding means 14 particularly tight so that the person can handle the molded article 10 via the holding means 14 particularly advantageously.
  • the holding means 14 is, in its longitudinal extension, open at only one location 50.
  • a first end 52 of the holding means 14 is connected to the article body 12.
  • the second end 54 of the holding means 14 is not connected to the article body 12, but arranged at a distance from the article body 12, so that the through holding means 14 according to Fig. 5 is configured as a one-side connected through holding means.
  • Fig. 5 shows a second embodiment of the molded article 10.
  • the holding means 14 is also configured as a through holding means, i.e. an open handle or open grip.
  • the open holding means or through holding means has at least one through opening 46 through which a person can put their fingers.
  • the holding means 14 according to the second embodiment is connected to the article body 12 at both ends 52 and 54.
  • the holding means 14 is completely closed in its longitudinal extension so that the holding means 14 is configured as a two- side connected through holding means which is also referred to as a two-side connected open handle.
  • Fig. 6 shows a third embodiment of the molded article 10.
  • the holding means 14 is configured as a non-trough holding means which is also referred to as a closed handle or closed grip.
  • the non-through holding means does not comprise any through opening trough which a person can put their fingers.
  • the non- through holding means has lateral receptacles which are arranged on opposite sides of the holding means 14. From said receptacles, a first one of said receptacles can be seen in Fig. 6, the first receptacle being indicated by 56.
  • the holding means 14 has at least one insertion direction in which a person can insert at least one of their fingers into the respective receptacle, wherein the receptacles are also referred to as depressions.
  • the holding means 14 or the respective receptacle is limited in the insertion direction by a wall 58 of the molded article 10, the wall 58 being arranged between said receptacles.
  • said receptacles are separated from one another by means of the wall 58.
  • the wall 58 is, for example, made of the pulp, wherein, for example, the wall 58 is formed in one piece with the holding means 14 and/or the article body 12. Since the wall 58 is recessed with respect to at least one wall portion 60 of the holding means 14, the wall 58 bounds or limits the receptacles. In other words, the wall 58 forms a bottom of the receptacles.
  • the wall 58 is recessed with respect to the wall portion 60, a person can insert at least one of their fingers into the respective receptacle until said at least one finger comes into contact with the wall 58.
  • the person can grasp the holding means 14 particularly tight.
  • the third embodiment shown in Fig. 6 corresponds to the state Z1 shown in Fig. 3, so that, for example, the portion 48 which is punched out forms, in the state Z1 , the wall 58.
  • the non- through holding means can be converted into a through holding means.
  • Fig. 7 shows a fourth embodiment of the method.
  • the holding means 14 is combined with at least one stripe which can be folded to prevent hard edges.
  • the stripe is made of kraft paper or another strong material which can be introduced into the mold 24 as described above, in particular similar to an in-mold labeling process, or applied at a later point in time.
  • Fig. 8 shows a fifth embodiment of the method.
  • the holding means 14 is hinged to the article body 12 so that the holding means 14 can be rotated about a rotation axis in relation to the article body 12.
  • the holding means 14 is formed in one piece with the article body 12.
  • the holding means 14 can be rotated about the rotation axis in relation to the article body 12 so that the end 50 comes into contact with the article body 12, in particular an area 62 of the article body 12.
  • the holding means 14 can be flapped down thereby bringing the end 50 in contact with the area 62.
  • the end 50 can be fixed to the article body 12, in particular the area 62 by, for example, nudging and/or clueing and/or welding.
  • Fig. 9 shows a sixth embodiment of the method.
  • the holding means 14 is made from at least one piece of paper or cardboard stripe or pulp or rigid plastic.
  • the holding means 14, in particular the end 53 of the holding means 14 can be fixed to the article body 12, in particular to the area 62.
  • the end 53 can be fixed to the article body 12, in particular to the area 62 by notching and/or clueing and/or welding.
  • the holding means 14 is attached to the article body 12 at the end 52 by at least one form fit which is, for example, created by the inlet 16 and the holding means 14 and/or the holding means 14 and the cap 18.
  • the holding means 14 is arranged between the article body 12 and the cap 18 so that the holding means 14 is attached to the article body 12 by means of the cap 18. Moreover, for example, the holding means 14 is rotated or screwed or snapped between the cap 18 and a thread by means of which the cap 18 can be screwed to the article body 12. In other words, for example, the holding means 14 is attached to the article body 12 by, for example, screwing and/or clamping and/or snapping.
  • Fig. 10 shows a seventh embodiment of the method.
  • the holding means 14 is configured as a prefabricated and, thus, separate component.
  • the holding means 14 is a handle which is produced separately from the article body 12.
  • the holding means 14 is attached to the article body 12 by, for example, notching and/or gluing and/or welding.
  • Fig. 1 1 shows a fourth embodiment of the molded article 10.
  • the molded article 10 does not comprise any holding means or grip feature.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Containers Having Bodies Formed In One Piece (AREA)
  • Paper (AREA)

Abstract

Cette invention concerne un procédé de fabrication d'un article moulé (10) à partir de pâte à papier (42), l'article (10) comprenant au moins un corps d'article (12), le procédé comprenant au moins les étapes de : l'introduction de la pâte (42) dans un moule (24), le moule (24) comprenant au moins une première cavité (26) pour former ledit corps d'article (12) ; et après l'étape d'introduction de la pulpe (42) dans le moule (24), la rotation et/ou l'agitation du moule de manière à revêtir au moins une partie de l'intérieur du moule (24) de la pâte (42), formant ainsi des parois du corps d'article (12). Selon un mode de réalisation préféré, l'article moulé est un récipient avec une poignée.
PCT/EP2016/069611 2016-08-18 2016-08-18 Procédé de fabrication d'un articule moulé à partir d'une pâte, article moulé fait de pâte et appareil de fabrication d'un tel article moulé Ceased WO2018033209A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/EP2016/069611 WO2018033209A1 (fr) 2016-08-18 2016-08-18 Procédé de fabrication d'un articule moulé à partir d'une pâte, article moulé fait de pâte et appareil de fabrication d'un tel article moulé

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/EP2016/069611 WO2018033209A1 (fr) 2016-08-18 2016-08-18 Procédé de fabrication d'un articule moulé à partir d'une pâte, article moulé fait de pâte et appareil de fabrication d'un tel article moulé

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WO2018033209A1 true WO2018033209A1 (fr) 2018-02-22

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3708709A1 (fr) 2019-03-14 2020-09-16 Danmarks Tekniske Universitet Procédé de fabrication d'un produit de pâte moulé et appareil de moulage de pâte
US20210301229A1 (en) * 2018-12-13 2021-09-30 Henkel Ag & Co. Kgaa Device And Method For Producing A Water-Soluble Shell And Washing Or Cleaning Agent Portions Containing This Water-Soluble Shell
US20210301228A1 (en) * 2018-12-13 2021-09-30 Henkel Ag & Co. Kgaa Apparatus And Process For Production Of A Water-Soluble Shell, And Washing Or Cleansing Agent Portion Packs Comprising Said Water-Soluble Shell And Containing A Viscoelastic, Solid Filling Substance
WO2023073581A1 (fr) * 2021-10-26 2023-05-04 Coflex S.A. De C.V. Réservoir à eau emboîtable et procédés de fabrication de réservoirs à eau emboîtables

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1956776A (en) * 1931-02-02 1934-05-01 Herman N Simpson Means for making hollow containers
DE102004059268A1 (de) * 2004-12-08 2006-06-29 Frormann, Lars, Prof. Dr.-Ing. Verfahren zur Verarbeitung von gefüllten auch fasergefüllten Suspensionen mittels Rotationsformen insbesondere zur Herstellung rotationssymmetrischer bindenahtfreier Hohlkörper aus Papier bzw. Faserstoffen beliebiger Durchmesser
WO2009153558A1 (fr) * 2008-06-17 2009-12-23 Greenbottle Limited Emballage
US20120248117A1 (en) * 2010-12-09 2012-10-04 Ecologic Re-usable carafe system with re-closable pouches
CN203212946U (zh) * 2013-02-26 2013-09-25 福建益源废物利用股份有限公司 一种废纸再生纸筒成型装置

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1956776A (en) * 1931-02-02 1934-05-01 Herman N Simpson Means for making hollow containers
DE102004059268A1 (de) * 2004-12-08 2006-06-29 Frormann, Lars, Prof. Dr.-Ing. Verfahren zur Verarbeitung von gefüllten auch fasergefüllten Suspensionen mittels Rotationsformen insbesondere zur Herstellung rotationssymmetrischer bindenahtfreier Hohlkörper aus Papier bzw. Faserstoffen beliebiger Durchmesser
WO2009153558A1 (fr) * 2008-06-17 2009-12-23 Greenbottle Limited Emballage
US20120248117A1 (en) * 2010-12-09 2012-10-04 Ecologic Re-usable carafe system with re-closable pouches
CN203212946U (zh) * 2013-02-26 2013-09-25 福建益源废物利用股份有限公司 一种废纸再生纸筒成型装置

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20210301229A1 (en) * 2018-12-13 2021-09-30 Henkel Ag & Co. Kgaa Device And Method For Producing A Water-Soluble Shell And Washing Or Cleaning Agent Portions Containing This Water-Soluble Shell
US20210301228A1 (en) * 2018-12-13 2021-09-30 Henkel Ag & Co. Kgaa Apparatus And Process For Production Of A Water-Soluble Shell, And Washing Or Cleansing Agent Portion Packs Comprising Said Water-Soluble Shell And Containing A Viscoelastic, Solid Filling Substance
EP3708709A1 (fr) 2019-03-14 2020-09-16 Danmarks Tekniske Universitet Procédé de fabrication d'un produit de pâte moulé et appareil de moulage de pâte
WO2020182961A1 (fr) 2019-03-14 2020-09-17 Danmarks Tekniske Universitet Procédé de fabrication d'un produit de cellulose moulée et appareil de moulage de cellulose
WO2023073581A1 (fr) * 2021-10-26 2023-05-04 Coflex S.A. De C.V. Réservoir à eau emboîtable et procédés de fabrication de réservoirs à eau emboîtables

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