Molding die system and method for forming cellulose products in molding die system

Abstract

A molding die system (3) for forming a cellulose product (1) from an air-formed cellulose preform structure (2), wherein the molding die system (3) includes a first die part (4a) and a second die part (4b). The first die part (4a) and the second die part (4b) are configured for pressing in the pressing direction (D). P The second mold section (4b) includes a molding cavity section (5) and an inlet section (6), wherein the inlet section (6) is arranged to connect to the molding cavity section (5) and is configured to facilitate the displacement of the cellulose preform structure (2) into the molding cavity (5a) of the molding cavity section (5). The inlet section (6) includes a transition surface (6a) defining an inlet opening (6b), and the inlet opening (6b) has a tapered configuration toward the molding cavity (5a). This disclosure further relates to a method for forming a cellulose product (1) from an air-formed cellulose preform structure (2) in a molding mold system (3).

Description

Technical Field

[0001] This disclosure relates to a molding die system for forming cellulose products from an air-formed cellulose preform structure. The molding die system includes a first die portion and a second die portion, wherein the first die portion and the second die portion are configured to move relative to each other in a pressing direction. This disclosure further relates to a method for forming cellulose products from an air-formed cellulose preform structure within the molding die system. Background Technology

[0002] Cellulose fibers are commonly used as raw materials for the production or manufacture of products. Products formed from cellulose fibers can be used in many different situations where sustainable products are required. Cellulose fibers can be used to produce a variety of products, such as disposable plates and cups, tableware, lids, bottle caps, coffee packets, preform structures, and packaging materials.

[0003] Molding die systems are commonly used in the manufacture of cellulose products from raw materials including cellulose fibers, and cellulose products have traditionally been produced using wet molding technology. The material typically used for cellulose fiber products is a wet-molded slurry. Wet-molded slurries have the advantage of being considered sustainable packaging materials because they are produced from biomaterials and can be recycled after use. Therefore, the adoption of wet-molded slurries for various applications is rapidly increasing. Wet-molded slurry articles are typically formed by immersing a suction molding die in a liquid or semi-liquid slurry suspension or slurry containing cellulose fibers, and by depositing the fibers onto the molding die under suction, forming the slurry body into the desired product shape. For all wet molding technologies, there is a need to dry the wet-molded products, which is a very time-consuming and energy-intensive part of production. The requirements for the aesthetic, chemical, and mechanical properties of cellulose products are increasing, and the mechanical strength, flexibility, freedom of material thickness, and chemical properties are limited due to the performance characteristics of wet-molded cellulose products. High-precision control of the mechanical properties of the product is also difficult in the wet molding process.

[0004] One advancement in the production of cellulose products is the elimination of wet molding techniques for forming cellulose fibers. Instead of forming cellulose products from liquid or semi-liquid slurries or suspensions, air-formed cellulose preform structures are used. These air-formed cellulose preform structures are inserted into a molding die, and during the molding of the cellulose product, the preform is subjected to high molding pressure and high molding temperature. When the cellulose preform structure is inserted into the molding die, there is a risk that it will break in an undesirable manner, leading to improper molding of the cellulose product. This is a common problem with conventional high-pressure cellulose molding dies, especially for deep-drawn products, resulting in low product quality. Other problems with conventional molding dies (especially in deep-drawn products) include cracks, fiber separation, material breakage, or other undesirable structural weakening of the cellulose preform structure formed during insertion into the molding die.

[0005] Therefore, there is a need for an improved molding die system and method for forming cellulose products from air-formed cellulose preform structures. Summary of the Invention

[0006] One object of this disclosure is to provide a molding die system for forming cellulose products from air-formed cellulose preform structures; and a method for forming cellulose products from air-formed cellulose preform structures within the molding die system, wherein the previously mentioned problems are avoided. This object is achieved at least in part by the features described in this invention. The invention comprises further advancements in a molding die system for forming cellulose products from air-formed cellulose preform structures and in a method for forming cellulose products from air-formed cellulose preform structures within the molding die system.

[0007] This disclosure relates to a molding die system for forming a cellulose product from an air-formed cellulose preform structure. The molding die system includes a first die portion and a second die portion, wherein the first die portion and the second die portion are configured to move relative to each other in a pressing direction. The second die portion includes a forming cavity section and an inlet section, wherein the inlet section is arranged to connect to the forming cavity section and is configured to facilitate displacement of the cellulose preform structure into the forming cavity of the forming cavity section. The inlet section includes a transition surface defining an inlet opening, wherein the inlet opening has a tapered configuration toward the forming cavity.

[0008] The advantage of these features is that the tapered inlet opening, defined by a transition surface, facilitates the transport or displacement of the cellulose preform structure into the forming cavity. Cellulose preform structures are loose, easily broken during handling, and conventional forming dies used with such loose cellulose structures often cause problems during the forming process. When the cellulose preform structure is inserted into the forming die, there is a risk that the cellulose preform structure will break in an undesirable manner, leading to improper forming of the cellulose product. These problems are avoided using the tapered inlet opening according to this disclosure, also for deep-drawn products. Through the inlet opening, products with high quality and a smooth finish can be produced in the forming die system. When the cellulose preform structure is displaced into the forming die, the tapered structure prevents the formation of cracks, fiber separation, material breakage, or other undesirable structural weakening. The system is also capable of producing deep-drawn products that, upon completion, lack a surface extending outward from the side of the deep-drawn product in a direction substantially perpendicular to the pressing direction or in a direction substantially orthogonal or perpendicular to the side of the deep-drawn product. In cellulose products, this avoids the need for surfaces like the brim of a hat, where such surfaces are unnecessary. Unlike deep-drawn metal products, due to the material properties of cellulose products, such surfaces are not easily removed by grinding or cutting after deep-drawing.

[0009] According to one aspect of this disclosure, the transition surface extends from the outer mold section of the second mold portion toward the cavity inlet opening of the molding cavity.

[0010] According to another aspect of this disclosure, the first wall surface segment and the transition surface of the first mold portion form an internal tear arrangement. The internal tear arrangement is configured to at least partially separate the cellulose preform structure portion from the cellulose preform structure between the first wall surface segment and the transition surface. By separating the cellulose preform structure portion from the cellulose preform structure, the transport of the cellulose preform structure into the molding cavity is simplified. For efficient molding of high-quality cellulose products, the cellulose preform structure may be too large, and the separation provides a smaller and easier-to-mold structure.

[0011] According to one aspect of this disclosure, a first mold portion includes a second wall surface portion arranged outwardly from a first wall surface portion. A second mold portion includes a third wall surface portion arranged outwardly from an inlet opening. The second and third wall surface portions form an external tear arrangement, which is configured to pre-separate the cellulose preform structure between the second and third wall surface portions. This pre-separation of the cellulose preform structure further simplifies the transport of the cellulose preform structure into the molding cavity. The cellulose preform structure is configured as a smaller, pre-separated structure suitable for further separation steps of the internal tear arrangement. This two-step separation process efficiently produces a high-quality cellulose product, and the pre-separation provides a smaller and more easily moldable cellulose preform structure.

[0012] According to another aspect of this disclosure, the transition surface has a curved conical structure. The curved conical structure provides a smooth transition shape for the transition surface, enabling efficient and controlled displacement of the cellulose preform structure.

[0013] According to another aspect of this disclosure, the transition surface includes a first surface segment extending from an outer mold segment in a direction toward the molding cavity, and a second surface segment extending from the first surface segment in the same direction toward the molding cavity. The first surface segment has a curved conical configuration, and the second surface segment has a curved conical configuration or a truncated conical configuration. The configuration having two surface segments (with the aforementioned shapes) provides an efficient and controlled displacement of the cellulose preform structure as an alternative.

[0014] According to one aspect of this disclosure, the second mold portion further includes an edge-forming section formed for preforming the cellulose preform structure portion and forming the edge of the cellulose product. The edge-forming section is arranged between the inlet section and the molding cavity section. The edge of the cellulose product is formed when the cellulose fibers of the cellulose preform structure portion are compressed and pushed into the molding cavity. As the cellulose preform structure portion shifts into the molding cavity, fibers arranged in the upper section of the cellulose preform structure portion are compressed and formed into the edge. Compression and transport of the fibers in the pressing direction support the formation of a compact and well-defined edge during the shifting of the cellulose preform structure portion. The edge-forming section can further be used to ensure complete or substantially complete separation of the cellulose preform structure portion from the cellulose preform structure.

[0015] According to another aspect of this disclosure, the edge forming section includes a wall surface. The wall surface connects the inlet section and the forming cavity section, and extends between the inlet section and the forming cavity section in or substantially in the pressing direction. This extension in the pressing direction serves to efficiently separate the structural portion of the cellulose preform from the cellulose preform body. The wall surface is arranged parallel to or substantially parallel to the pressing direction. The wall surface and the extension of the edge forming section in the pressing direction can vary depending on the design of the molding die system.

[0016] According to another aspect of this disclosure, the inlet section includes one or more protrusions extending from the outer mold section toward the molding cavity, and / or one or more grooves extending from the outer mold section toward the molding cavity. The protrusions and / or grooves are configured to control the displacement of the cellulose preform structure into the molding cavity. The protrusions and / or grooves support the controlled displacement into the molding cavity.

[0017] According to one aspect of this disclosure, the inlet section is arranged as an integral structure of the second mold portion. Using this construction, the second mold portion can be made from a single piece of material with high strength and a high surface finish.

[0018] According to another aspect of this disclosure, the first mold portion and / or the second mold portion include a deformation element. The deformation element is configured to apply molding pressure to the cellulose preform structure within the molding cavity. The deformation element provides efficient molding of cellulose products, particularly in cases involving complex shapes or structural reinforcements.

[0019] According to another aspect of this disclosure, the molding pressure is in the range of 1-100 MPa, preferably 4-20 MPa. Formation of the cellulose product within this pressure range ensures efficient fibril aggregation through hydrogen bonding of cellulose fibers within the cellulose preform structure.

[0020] According to one aspect of this disclosure, the molding pressure is a uniform molding pressure. Uniform molding pressure provides efficient molding of cellulose products with complex shapes.

[0021] According to another aspect of this disclosure, the sidewall sections and transition surfaces of the deformable element form a clamping arrangement. The clamping arrangement is configured to clamp the cellulose preform structure between the sidewall sections and the transition surface. The clamping arrangement ensures efficient transport of the cellulose preform structure into the molding cavity, wherein a narrow opening or gap with a reduced size in the pressing direction is formed between the sidewall sections and the transition surface during movement of the first mold portion and / or the second mold portion in the pressing direction.

[0022] This disclosure further relates to a method for forming a cellulose product from an air-formed cellulose preform structure in a molding die system. The molding die system includes a first die portion and a second die portion, and the first die portion and the second die portion are movably arranged relative to each other in a pressing direction. The second die portion includes a molding cavity section and an inlet section. The inlet section is arranged to connect to the molding cavity section and is configured to facilitate displacement of the cellulose preform structure into the molding cavity of the molding cavity section. The inlet section includes a transition surface defining an inlet opening, wherein the inlet opening has a tapered configuration toward the molding cavity. The method includes the following steps: providing an air-formed cellulose preform structure and supplying the cellulose preform structure to a molding die system; arranging the cellulose preform structure in a first configuration connected to an inlet section at a position between a first die portion and a second die portion; moving the first die portion and / or the second die portion in a pressing direction and using the first die portion to displace the cellulose preform structure into a molding cavity, and controlling the forming of the cellulose preform structure having a transition surface from the first configuration to the second configuration during the displacement of the cellulose preform structure, wherein the cellulose preform structure in the second configuration is formed into a three-dimensional cellulose preform body; forming a cellulose product by heating the three-dimensional cellulose preform body to a molding temperature and pressing the three-dimensional cellulose preform body in the molding cavity between the first die portion and the second die portion using molding pressure.

[0023] The advantage of this method is that the tapered structure defined by the transition surface facilitates the transport or displacement of the cellulose preform structure into the forming cavity through the inlet opening. The cellulose preform structure is a loose structure that is easily broken during processing, and the transition surface prevents the cellulose preform structure from breaking in an undesirable manner, resulting in the formation of high-quality cellulose products, as well as deep-drawn products. Through the inlet opening, products with a high surface finish can be produced in the forming die system. The tapered structure further prevents the formation of cracks, fiber separation, material breakage, or other undesirable structural weakening during the displacement of the cellulose preform structure into the forming die. Regarding this system, the method can also produce deep-drawn products that, upon completion, lack a surface extending outward from the side of the deep-drawn product in a direction substantially perpendicular to the pressing direction or in a direction substantially orthogonal or perpendicular to the side of the deep-drawn product. For cellulose products, this avoids surfaces similar to the brim of a hat, which are undesirable in this case. Unlike metal deep-drawn products, for cellulose products, due to the material properties of cellulose, such surfaces are not easily removed by, for example, grinding or cutting after the deep-drawn cellulose product is formed.

[0024] According to one aspect of this disclosure, a first wall surface segment and a transition surface of a first mold portion form an internal tearing arrangement. The method includes the step of: during movement of the first mold portion and / or the second mold portion in a pressing direction, at least partially tearing the cellulose preform structure using the internal tearing arrangement between the first wall surface segment and the transition surface. By separating the cellulose preform structure portion from the cellulose preform structure, the transport of the cellulose preform structure into the molding cavity is simplified. For efficient molding of high-quality cellulose products, the cellulose preform structure may be an excessively large structure, and separation provides a smaller and more easily moldable structure.

[0025] According to another aspect of this disclosure, the method includes the step of: at least partially separating a portion of the cellulose preform structure from the cellulose preform structure during tearing of the cellulose preform structure, wherein the at least partially separated portion of the cellulose preform structure forms a three-dimensional cellulose preform body in a second configuration. Separating the portion of the cellulose preform structure from the cellulose preform structure simplifies the transformation into a cellulose preform body. For efficient molding of high-quality cellulose products, the cellulose preform structure may be too large, and separation provides a smaller and more easily moldable structure.

[0026] According to another aspect of this disclosure, the first mold portion includes a second wall surface portion arranged outwardly from a first wall surface portion. The second mold portion includes a third wall surface portion arranged outwardly from an inlet opening. The second and third wall surface portions form an external tear arrangement. The method includes the step of pre-separating the cellulose preform structure between the second and third wall surface portions using the external tear arrangement before at least partially tearing the cellulose preform structure using the internal tear arrangement, during movement of the first and / or second mold portions in a pressing direction. Pre-separation of the cellulose preform structure further simplifies the transport of the cellulose preform structure into the molding cavity. The cellulose preform structure is separated into a smaller structure suitable for further separation steps of the internal tear arrangement. This two-step separation process efficiently produces a high-quality cellulose product, and the pre-separation provides a smaller and more easily moldable cellulose preform structure.

[0027] According to one aspect of this disclosure, the first configuration of the cellulose preform structure is a flat or substantially flat shape. A flat or substantially flat shape is suitable when the cellulose preform structure is arranged between a first mold portion and a second mold portion in order to achieve an efficient molding process.

[0028] According to another aspect of this disclosure, the method includes the step of: shaping a three-dimensional cellulose preform into a folded three-dimensional structure in a second configuration. The folded structure ensures efficient molding of the cellulose product within the molding cavity. The folding prevents the cellulose preform structure from cracking or breaking during molding into the cellulose product.

[0029] According to another aspect of this disclosure, the method includes the step of compressing the cellulose preform structure during deformation from a first configuration to a second configuration. Compression provides a pre-forming or pre-shaping of the cellulose preform structure to improve the molding of the cellulose product. Compared to an uncompressed structure, the compressed cellulose preform structure is easier to handle and ensures better molding results in the molding cavity when molding temperature and molding pressure are applied.

[0030] According to one aspect of this disclosure, a first mold portion and / or a second mold portion include a deformation element. The method includes the step of applying molding pressure to a three-dimensional cellulose preform body within a molding cavity using the deformation element during the molding of the cellulose product. The deformation element provides efficient molding of the cellulose product, particularly in cases involving complex shapes or structural reinforcements.

[0031] According to another aspect of this disclosure, the sidewall sections and transition surfaces of the deformable element form a clamping arrangement. The method includes the step of clamping a cellulose preform structure using the clamping arrangement between the sidewall sections and the transition surface during movement of a first mold portion and / or a second mold portion along a pressing direction. The clamping arrangement ensures efficient transport of the cellulose preform structure into the molding cavity using this method, wherein a narrow orifice with a reduced size in the pressing direction is formed between the sidewall sections and the transition surface during movement of the first mold portion and / or the second mold portion along the pressing direction.

[0032] According to another aspect of this disclosure, the method includes the steps of: arranging a molding die system using friction between a deformable element and a cellulose preform structure, said friction being higher than the friction between a transition surface and the cellulose preform structure. The higher friction between the deformable element and the cellulose preform structure supports the displacement of the cellulose preform structure into a molding cavity, and the shaping of the cellulose preform structure from a first configuration to a second configuration. The higher friction between the deformable element and the cellulose preform structure enables more reliable and efficient displacement of the cellulose preform structure, wherein the deformable element efficiently captures the cellulose preform structure. As the cellulose preform structure displaces, the lower friction between the transition surface and the cellulose preform structure ensures that the cellulose preform structure can easily slide along the transition surface into the molding cavity.

[0033] According to one aspect of this disclosure, the molding pressure is in the range of 1-100 MPa, preferably 4-20 MPa, and the molding temperature is in the range of 100-300°C. Forming cellulose products within this pressure and temperature range ensures effective fibril aggregation through hydrogen bonding of cellulose fibers in the cellulose preform structure.

[0034] According to another aspect of this disclosure, the molding pressure is a uniform molding pressure. Uniform molding pressure provides efficient molding of cellulose products with complex shapes, wherein the pressure distribution in the molding die is equal in all directions during the molding of the cellulose product.

[0035] According to one aspect of this disclosure, the steps are:

[0036] - During the movement of the first mold section and / or the second mold section in the pressing direction, the cellulose preform structure is at least partially torn apart using the internal tearing arrangement between the first wall surface section and the transition surface.

[0037] This occurs before the following steps:

[0038] - A cellulose product is formed by heating the three-dimensional cellulose preform body to the molding temperature and pressing the three-dimensional cellulose preform body with molding pressure in the molding cavity between the first mold part and the second mold part.

[0039] According to another aspect of this disclosure, the steps are:

[0040] -During the tearing of the cellulose preform structure, at least partially separate the cellulose preform structure from the cellulose preform structure.

[0041] This occurs before the following steps:

[0042] - A cellulose product is formed by heating the three-dimensional cellulose preform to the molding temperature and pressing the three-dimensional cellulose preform into the molding cavity between the first mold part and the second mold part using molding pressure.

[0043] According to another aspect of this disclosure, the steps are:

[0044] - Before at least partially tearing the cellulose preform structure using the first tearing arrangement, during the movement of the first mold portion and / or the second mold portion in the pressing direction, the cellulose preform structure is pre-separated using the external tearing arrangement between the second wall surface section and the third wall surface section.

[0045] This occurs before the following steps:

[0046] - A cellulose product is formed by heating the three-dimensional cellulose preform to the molding temperature and pressing the three-dimensional cellulose preform into the molding cavity between the first mold part and the second mold part using molding pressure.

[0047] By performing the steps of separating, at least partially separating, or pre-separating the structure of the cellulose preform before applying molding pressure to provide the cellulose product, a cellulose product with a smooth surface structure on the sides, which has no edges extending in a direction substantially perpendicular to the pressing direction, can be obtained. Attached Figure Description

[0048] This disclosure will now be described in detail with reference to the accompanying drawings, in which...

[0049] Figure 1a -d schematically illustrates the molding die system according to this disclosure in a cross-sectional view.

[0050] Figure 2 An exploded perspective view schematically illustrates the mold portion of a molding die system having a molding cavity section and an inlet section according to the present disclosure.

[0051] Figure 3a -f schematically illustrates, in cross-sectional view, the molding die system according to this disclosure at different molding positions.

[0052] Figure 4 A molding die system according to another embodiment of the present disclosure is schematically shown in cross-sectional view.

[0053] Figure 5a -b schematically illustrates a molding die system and a die portion of the molding die system according to another embodiment of the present disclosure in a cross-sectional view and an exploded perspective view.

[0054] Figure 6 An exploded perspective view schematically illustrates a mold portion of a molding die system having a molding cavity section and an inlet section according to another embodiment of the present disclosure.

[0055] Figure 7a -g schematically illustrates, in a cross-sectional view, a molding die system at different molding positions according to another embodiment of the present disclosure.

[0056] Figure 8 A molding die system according to another embodiment of the present disclosure is schematically shown in cross-sectional view, and

[0057] Figure 9a -c schematically illustrates the mold portion of a molding die system according to other embodiments of the present disclosure in a perspective view. Detailed Implementation

[0058] The various aspects of this disclosure will now be described in conjunction with the accompanying drawings to illustrate the disclosure and not limit it, wherein similar reference numerals denote similar elements, and variations in the aspects are not limited to the specifically illustrated embodiments, but may be applied to other variations of the disclosure.

[0059] Those skilled in the art will understand that the steps, services, and functions described herein can be implemented using separate hardware circuitry, combined with a programmed microprocessor or general-purpose computer using software functions, using one or more application-specific integrated circuits (multiple ASICs), and / or using one or more digital signal processors (multiple DSPs). It should also be understood that when this disclosure is described in one manner, it can also be embodied in one or more processors and one or more memories coupled to one or more processors, one or more of which stores one or more programs that, when executed by one or more processors, perform the steps, services, and functions disclosed herein.

[0060] exist Figure 1a -d、 Figure 2 and Figure 3a In -f, a molding die system 3 for forming cellulose product 1 from an air-formed cellulose preform structure 2 is schematically shown. The molding die system 3 includes a first die portion 4a and a second die portion 4b, and the first die portion 4a and the second die portion 4b are configured for use in the pressing direction D. P They move relative to each other. Figure 1a -d、 Figure 2 and Figure 3a In the embodiment shown in -f, the second mold portion 4b is fixed, and the first mold portion 4a is relative to the second mold portion 4b in the pressing direction D. P It can be moved around. For example... Figure 1a As indicated by the double arrows in -b, the first mold portion 4a is configured along the pressing direction D. P The upwardly extending axis A moves linearly toward and away from the second mold portion 4b. In an alternative embodiment, the first mold portion 4a may be fixed, while the second mold portion 4b may be movably arranged relative to the first mold portion 4a, or the two mold portions may be movably arranged relative to each other. In this embodiment, the deformable element 12 is attached to the first mold portion 4a.

[0061] It should be understood that, for all embodiments according to this disclosure, in the pressing direction D P The description of upward movement includes along the pressing direction D PThe movement of the upper-extending axis A, and this movement can occur along axis A in opposite directions. This description further includes linear and non-linear movement of the mold portion for all embodiments, wherein the result of the movement during molding is a repositioning of the mold portion between a first position P1 and a second position P2 on axis A, wherein axis A is in the pressing direction D. P Extending upwards, such as Figure 3a and 3e As illustrated schematically, the movement of the mold portion between positions P1 and P2 can be linear or non-linear. Figure 3a and 3e In the embodiment shown, during molding, the first position P1 is the upper position and the second position P2 is the lower position or the lowest position P2.

[0062] According to this disclosure, the cellulose preform structure 2 refers to a fibrous fabric structure produced from cellulose fibers. Air forming of the cellulose preform structure 2 refers to the forming of the cellulose preform structure during a dry forming process, wherein the cellulose fibers are air-formed to produce the cellulose preform structure. When the cellulose preform structure 2 is formed during air forming, the cellulose fibers are carried by air as a carrier medium and formed into the fibrous preform structure 2. This differs from ordinary papermaking processes or conventional wet forming processes, in which water is used as a carrier medium for the cellulose fibers when forming paper or fibrous structures. During air forming, if necessary, a small amount of water or other substances can be added to the cellulose fibers to alter the properties of the cellulose product, but air still serves as the carrier medium during the forming process. If appropriate, the cellulose preform structure 2 can have a dryness level primarily corresponding to the ambient humidity of the atmosphere surrounding the air-formed cellulose preform structure 2. Alternatively, the dryness level of the cellulose preform structure 2 can be controlled to achieve a suitable dryness level when forming the cellulose product 1.

[0063] Cellulose preform structure 2 can be formed from cellulose fibers in a conventional air-forming process and constructed in various ways. For example, depending on the desired properties of cellulose product 1, cellulose preform structure 2 can have a composition in which the fibers are from the same source or optionally contain a mixture of two or more types of cellulose fibers. The cellulose fibers used in cellulose preform structure 2 are firmly bonded to each other by hydrogen bonds during the molding process of cellulose product 1. Cellulose fibers can be mixed with other substances or compounds in certain amounts, which will be further described below. Cellulose fibers refer to any type of cellulose fiber, such as natural cellulose fibers or man-made cellulose fibers.

[0064] The cellulose preform structure 2 can have a single-layer or multi-layer construction. A single-layer cellulose preform structure 2 refers to a cellulose preform structure formed from a single layer containing cellulose fibers. A multi-layer cellulose preform structure 2 refers to a cellulose preform structure formed from two or more layers containing cellulose fibers, wherein these layers may have the same or different compositions or structures. The cellulose preform structure 2 may include a reinforcing layer containing cellulose fibers, wherein the reinforcing layer is arranged as a support layer for the other layers of the cellulose preform structure 2. The reinforcing layer may have a higher tensile strength than the other layers of the cellulose preform structure 2. This is useful when one or more layers of the cellulose preform structure 2 have a low tensile strength composition in order to prevent the cellulose preform structure 2 from breaking during the formation of the cellulose product 1. The reinforcing layer with higher tensile strength thus acts as a support structure for the other layers of the cellulose preform structure 2. The reinforcing layer may be, for example, a tissue layer containing cellulose fibers, an air-laid structure containing cellulose fibers, or other suitable layered structures.

[0065] The cellulose preform structure 2 is a loose and breathable structure in which the cellulose fibers forming the structure are loosely arranged relative to each other. The loose cellulose preform structure 2 is used for the effective molding of the cellulose product 1, thereby allowing the cellulose fibers to form the cellulose product 1 in an efficient manner during the molding process.

[0066] like Figure 1a -d、 Figure 2 and Figure 3a As shown in -f, the second mold portion 4b includes a molding cavity section 5 and an inlet section 6, wherein the inlet section 6 is arranged to connect to the molding cavity section 5. In the illustrated embodiment, the inlet section 6 is arranged to connect directly to the molding cavity section 5. The inlet section 6 is configured to facilitate the displacement of the cellulose preform structure 2 into the molding cavity 5a of the molding cavity section 5, and the inlet section 6 includes a transition surface 6a defining an inlet opening 6b. The inlet opening 6b of the inlet section 6 has a tapered configuration toward the molding cavity 5a. The transition surface 6a can have any suitable shape that provides the tapered configuration of the inlet opening 6b. Figure 1a -d、 Figure 2 and Figure 3a In the embodiment shown in -f, the transition surface 6a forming the inlet opening 6b has a curved conical structure with a curved conical cross-sectional shape facing the molding cavity 5a, and the inlet opening 6b of the inlet segment 6 is in the pressing direction D facing the molding cavity 5a. PIt has a tapered structure. However, other suitable cross-sectional shapes can be used if desired, and other curved shapes, as well as non-curved shapes or combinations of different shapes, can be used. If a curved cross-sectional shape is used, the transition surface 6a can be provided with a specific radius. If desired, this radius can vary around the inlet opening 6b. It should also be further understood that the cross-sectional shape of the transition surface 6a can vary along the inlet opening 6b. Figure 1a -d、 Figure 2 and Figure 3a In the embodiment shown in -f, the inlet section 6 surrounds the molding cavity 5a. In an alternative embodiment, the second mold section 4a can be designed to have an inlet section 6 that only partially surrounds the molding cavity 5a.

[0067] Figure 2 An exploded perspective view of the second mold portion 4b is shown to illustrate the construction of the different sections of the mold portion. In this figure, a molding cavity section 5 with a molding cavity 5a and an inlet section 6 with an inlet opening 6b formed by a transition surface 6a are shown. The second mold portion 4b may be formed with the molding cavity section 5 and the inlet section 6, which are integrated into a common structural part, wherein the inlet section 6 is arranged as an integral structure of the second mold portion 4b. Alternatively, the molding cavity section 5 and the inlet section 6 may be arranged as two or more connected independent structural parts. The molding cavity section 5 and the inlet section 6 may both be made of the same suitable material or material composition, or alternatively, the molding cavity section and the inlet section may be made of different suitable materials or material compositions. Suitable materials or material compositions may be, for example, aluminum, steel, other metals or alloys, composite materials, ceramic materials, or combinations of different materials.

[0068] like Figure 1a -d and Figure 2 As shown, the transition surface 6a extends from the outer mold section 4b of the second mold portion 4b. OS The cavity inlet opening 5b extends toward the molding cavity 5a. The cavity inlet opening 5b of the molding cavity 5a is arranged as an outer section of the molding cavity 5a, through which the cellulose preform structure 2 is inserted into the molding cavity 5a during the molding process. Figure 2 As shown, the cavity inlet opening 5b is defined by the outer periphery 5c of the molded cavity 5a surrounding it. Figure 2 As shown, the inlet opening 6b formed by the transition surface 6a is defined by an inner periphery 6c and an outer periphery 6d surrounding the inlet opening 6b. Therefore, the transition surface 6a extends between the outer periphery 6d and the inner periphery 6c. In this embodiment, the outer periphery 5c of the formed cavity 5a is arranged to be directly connected to the inner periphery 6c of the inlet opening 6b.

[0069] For all embodiments according to this disclosure, the tapered construction of the inlet opening 6b refers to the inlet opening being located from the outer mold section 4b. OS It narrows as it moves toward the cavity inlet opening 5b. Therefore, the transition surface 6a is configured to reduce the size of the outer mold section 4b. OS The area of ​​the inlet opening 6b between the cavity inlet opening 5b and the cavity inlet opening 5b.

[0070] refer to Figure 1a In the embodiment shown, the conical structure of the inlet opening 6a uses the cross-sectional area A of the inlet opening 6a. IO Let's take an example. When moving towards the forming cavity 5a, the cross-sectional area A of the inlet opening 6b... IO Decrease. Figure 1a Cross-sectional area A in the illustrated embodiment IO This is because the second mold part 4b is relative to the pressing direction D P The structure, wherein the cross-sectional area is measured as the inlet opening 6a in a direction perpendicular to the pressing direction D P The area in the plane. Figure 1a In the illustrated embodiment, due to the tapered structure of the cross-sectional area, the first cross-sectional area A1 of the segment of the inlet opening 6a closest to the molding cavity inlet opening 5b is smaller than that of the inlet opening arranged with the outer mold segment 4b. OS The second cross-sectional area A2 of the connecting segment.

[0071] In different embodiments, the term "conical structure" refers to the transition surface 6a having a structure that narrows toward the forming cavity. In different embodiments, the term "bent conical structure" refers to the transition surface 6a forming the inlet opening 6b having a bent conical cross-sectional shape toward the forming cavity 5a, and the transition surface 6a therefore having a bent surface structure that narrows toward the forming cavity 5a.

[0072] The transition surface 6a can be defined such that at any point along the inlet opening 6b, the transition surface 6a merges into a direction parallel to the pressing direction D. P The end in the direction. Therefore, in this case, the inner periphery 6c is defined by the transition surface 6a merging into a point in the direction parallel to the pressing direction.

[0073] The first wall surface segment 4a1 of the first mold part 4a and the transition surface 6a form an inner tearing arrangement 7a, such as Figure 1dAs illustrated schematically, the internal tearing arrangement 7a is configured to at least partially separate the cellulose preform structure portion 2b from the cellulose preform structure 2 between the first wall surface segment 4a1 and the transition surface 6a. During the tearing process, the cellulose preform structure 2 is separated into the cellulose preform structure portion 2b and the separated cellulose preform structure 2d. The cellulose preform structure portion 2b is used to form the cellulose product 1, and the residual cellulose 2c in the separated cellulose preform structure 2d can be recycled and reused.

[0074] exist Figure 1a -d、 Figure 2 , Figure 3a In the embodiment shown in -f, the first wall surface segment 4a1 is formed from the outer wall surface of the first mold portion 4a. However, it should be understood that any suitable wall surface segment of the first mold portion 4a can be used to mate with the transition surface 6a to form an inner tear arrangement 7a. During the movement of the first mold portion 4a toward the second mold portion 4b, the first wall surface segment 4a1 approaches the transition surface 6a, wherein a gap G is formed between the first wall surface segment 4a1 and the transition surface 6a. Figure 1d As shown, the gap G has a narrowing structure between the first wall surface segment 4a1 and the transition surface 6a, and during the movement of the mold portions relative to each other, the cellulose preform structure 2 is pushed into the molding cavity 5a by the first mold portion 4a. During the movement of the cellulose preform structure 2 into the molding cavity, the narrowing gap between the first wall surface segment 4a1 and the transition surface 6a tears the cellulose preform structure 2 into cellulose preform structure portion 2b and separated cellulose preform structure 2d. During the tearing process, depending on the structure of the first wall surface segment 4a1 and the transition surface 6a, the cellulose preform structure 2 will be completely separated or at least partially separated into cellulose preform structure portion 2b and separated cellulose preform structure 2d. The shorter the distance between the first wall surface segment 4a1 and the transition surface 6a, the narrower the gap G is, resulting in more complete separation.

[0075] After at least partially separating the cellulose preform structure 2 into cellulose preform structure portion 2b and the separated cellulose preform structure 2d, a final pressing is performed to ultimately press the cellulose preform structure portion 2b into its final product shape. This allows the sides of the final product to achieve a smooth surface texture because the molding pressure on the cellulose preform structure portion 2b is substantially perpendicular to the sides of the cellulose preform structure portion 2b, such as... Figure 1d As can be seen in the image. Therefore, it is possible to avoid perpendicular to the pressing direction D. P Extended surface, and to obtain straight product sides with a smooth surface structure. This is, for example... Figures 3a-3f Further, it can be seen in the order that, Figure 3dThe diagram shows the separation of cellulose preform structure 2 into cellulose preform structure portion 2b and at least partially separated cellulose preform structure 2d, and... Figure 3e The diagram shows the pressing of the cellulose preform structural portion 2b into its final product shape. (Example) Figure 3f As can be seen, cellulose product 1 has a generally straight side, without a side that is generally perpendicular to the pressing direction D. P Or the edge extending in a direction orthogonal to the side of the cellulose product. The side may also be appropriately curved, but still not in a direction substantially perpendicular to the pressing direction D. P Or an edge extending in a direction substantially orthogonal or perpendicular to the outer surface of cellulose product 1.

[0076] If desired, the system and method according to this disclosure can be used in other embodiments, not shown, to include a direction substantially perpendicular to the pressing direction D. P Cellulose products extending along the edge in the direction of [the direction of the product].

[0077] It should be understood that tearing according to this disclosure is a process and mechanism different from cutting. Tearing is the act of separating material by force without the aid of a cutting tool. Unlike cutting, which is usually done along straight or patterned lines controlled by a tool, tearing is generally uneven to some extent. Materials vary in their sensitivity to tearing, and experiments have clearly shown that cellulose preform structure 2 is suitable for separation by tearing.

[0078] As described above, the transition surface 6a has a curved conical structure, such as Figure 1a -d、 Figure 2 , Figure 3a As shown in the embodiment -f, the cross-sectional shape of the transition surface 6a is derived from the outer mold section 4b. OS The curve forms to the molding cavity 5a. In an alternative embodiment, if suitable for forming a cellulose product, the transition surface 6a may be divided into two or more surface segments. The transition surface 6a may, for example, include two surface segments, wherein the first surface segment extends from the outer mold segment 4b. OS The first surface segment extends a certain distance toward the molding cavity 5a, and the second surface segment extends from the first surface segment toward the molding cavity 5a, depending on the construction of the inlet segment 6. The first surface segment may, for example, have a curved conical construction, and the second surface segment may, for example, have a different curved conical construction or a truncated conical construction. By giving two or more segments of the transition surface 6a different constructions, the displacement and tearing of the cellulose preform structure 2 can be effectively controlled.

[0079] exist Figure 4The diagram schematically illustrates an alternative illustrative embodiment of the molding die system 3. In this embodiment, the second die portion 4b has a transition surface 6a with two surface segments. The transition surface 6a includes a first surface segment 8a and a second surface segment 8b, the first surface segment being in the pressing direction D. P Upper outer mold section 4b OS Extending toward the molding cavity 5a, the second surface segment is in the pressing direction D P The upper part extends from the first surface segment 8a to the molded cavity 5a. The first surface segment 8a has a curved conical structure, and the second surface segment 8b has a truncated conical structure. It should be understood that other conical structures may also be used for both surface segments.

[0080] exist Figure 5a In the alternative embodiment illustrated schematically in -b, the second mold portion 4b of the molding die system 3 further includes an edge forming section 9. The edge forming section 9 is configured to preform the cellulose preform structure portion 2b during the molding process and form the edge 1a of the cellulose product 1. For example, this can be used to provide the edge 1a with a specific shape different from the rest of the side of the cellulose product 1. For example, the edge 1a can be provided with curvature, and if the side of the cellulose product is curved, the edge 1a can be straight, or the straight edge 1a can extend at an angle different from the rest of the side of the cellulose product 1. The edge forming section 9 can further be used to completely separate the cellulose preform structure 2 into the cellulose preform structure portion 2b and the separated cellulose preform structure 2d. The edge forming section 9 is arranged between the inlet section 6 and the molding cavity section 5. The inlet section 6 and the molding cavity section 5 can be constructed as described in the above embodiments. The edge forming section 9 provides the distance between the inlet section 6 and the molding cavity section 5 and serves the purpose of forming the edge 1a of the cellulose product 1. When the cellulose fibers of the cellulose preform structure 2b are pushed into the molding cavity 5a, an edge 1a is formed. Specifically, when the cellulose preform structure 2b is further pushed into the molding cavity 5a through the first mold portion 4a, the fibers located in the upper section of the cellulose preform structure 2b are compressed and shaped into the edge 1a. The fibers are in the pressing direction D... P The compression and transport supports form a compact and well-defined edge 1a. If the molding die system 3 is provided with an internal tearing arrangement 7a, the edge forming section 9 can also be used to ensure effective separation of cellulose fibers after tearing the cellulose preform structure. The construction and extension of the edge forming section 9 between the inlet section 6 and the molding cavity section 5 can vary depending on the design of the die section. The edge forming section 9 can, for example, have a varying extension between the inlet section 6 and the molding cavity section 5, or as... Figure 5a-b schematically illustrates that the edge-forming segment 9 has a uniform extension between the inlet segment 6 and the forming cavity segment 5. The edge-forming segment 9 includes a wall surface 9a that defines an opening 9b in the edge-forming segment 9. The wall surface 9a extends through the extension between the inlet segment 6 and the forming cavity segment 5, thereby connecting the inlet segment 6 and the forming cavity segment 5. As shown... Figure 5a As schematically shown, the wall surface 9a extends along the pressing direction D between the inlet section 6 and the forming cavity section 5. P Extend or basically along the pressing direction D P The wall surface 9a extends between the inner periphery 9c and the outer periphery 9d of the opening 9b. The inner periphery 9c of the opening 9b is arranged to connect with the outer periphery 5c of the formed cavity 5a. The outer periphery 9d of the opening 9b is arranged to connect with the inner periphery 6c of the inlet opening 6b. Therefore, in the illustrated embodiment, the wall surface 9a extends between the inner periphery 6c of the inlet opening 6b and the outer periphery 5c of the formed cavity 5a.

[0081] In order to form cellulose product 1 from air-formed cellulose preform structure 2 in molding die system 3, air-formed cellulose preform structure 2 is provided and supplied to molding die system 3 using suitable feeding devices. Figure 1b , Figure 3a and Figure 5a As shown, the cellulose preform structure 2 in the first configuration C1 is arranged to connect with the inlet section 6 at a position between the first mold section 4a and the second mold section 4b. To illustrate the molding of the cellulose product 1 in the molding die system 3, the following will be combined with... Figure 3a The embodiment shown in -f describes different steps. It should be understood that these steps may be the same for other embodiments described. The first mold portion 4a and / or the second mold portion 4b are pressed along the pressing direction D. P The cellulose preform structure 2 is moved, and during the movement, it is moved together with the first mold portion 4a into the molding cavity 5a, as shown. Figure 3b As shown in -d. During the displacement process of the cellulose preform structure 2, the forming of the cellulose preform structure 2 from the first configuration C1 to the second configuration C2 is controlled by the transition surface 6a, as shown in the figure. Figure 3d As shown, the cellulose preform structure 2 in the second configuration C2 is formed into a three-dimensional cellulose preform body 2a.

[0082] like Figure 3e As shown, by heating the three-dimensional cellulose preform to the molding temperature T F Furthermore, molding pressure P is used in the molding cavity 5a between the first mold part 4a and the second mold part 4b. F Pressing the three-dimensional cellulose preform body 2a forms cellulose product 1. Figure 3fIn the molding process, the cellulose product 1 has been formed, and the first mold portion 4a has moved away from the second mold portion 4b. The cellulose product 1 can now be removed from the molding die system 3, and the residual cellulose 2c of the separated cellulose preform structure 2d can be recovered for further use. A molding pressure P is formed in the mold system 3 by pressure F. F .

[0083] like Figure 3d As shown, the first wall surface segment 4a1 of the first mold portion 4a and the transition surface 6a form an inner tearing arrangement 7a. Along the pressing direction D, in the first mold portion 4a and / or the second mold portion 4b... P During the movement, the inner tearing arrangement 7a at least partially tears the cellulose preform structure 2 between the first wall surface segment 4a1 and the transition surface 6a. During the tearing process of the cellulose preform structure 2, the cellulose preform structure portion 2b is separated from the cellulose preform structure 2, and the at least partially separated cellulose preform structure portion 2b forms a three-dimensional cellulose preform body 2a in the second configuration C2.

[0084] The first configuration C1 of the cellulose preform structure 2 is, for example, a flat or substantially flat shape. The three-dimensional cellulose preform body 2a can be further shaped, for example, into a folded three-dimensional structure in a second configuration C2. During the deformation of the cellulose preform structure 2 from the first configuration C1 to the second configuration C2, the cellulose preform structure 2 can be compressed or compacted to improve the deformation of the cellulose preform structure 2 and the molding of the cellulose product 1. Due to the closer interaction between the cellulose fibers in the cellulose preform structure 2, the compressed or compacted cellulose preform structure 2 has higher tensile strength. The compressed or compacted cellulose preform structure 2 has improved breakage resistance when displaced into the molding cavity 5a and is less prone to breakage or cracking during transport into the molding cavity 5a.

[0085] The tapered structure of the transition surface 6a is configured to control the forming of the cellulose preform structure 2 from the first structure C1 to the second structure C2, wherein the cellulose preform structure 2 is formed into a three-dimensional cellulose preform body 2a in the forming cavity 5. Forming occurs in the first mold portion 4a and the second mold portion 4b along the pressing direction D. P During the movement toward each other and during the deformation of the cellulose preform structure 2 from the first configuration C1 to the second configuration C2.

[0086] Based on the design of the molding die system 3, the transition surface 6a can be arranged from the outer die section 4b. OS Extending to a curve surrounding the inlet opening, wherein at each point on this curve, the transition surface 6a is parallel to the pressing direction D. P Outer mold section 4b OSIt can be arranged perpendicular to the pressing direction D P Or basically perpendicular to the pressing direction D P A planar surface.

[0087] If necessary, the molding die system may further include a cutting edge arranged in the second die section, rather than a tearing arrangement, wherein the cutting edge surrounds the cavity inlet opening 5b of the molding cavity 5a and is arranged to connect with the inlet section 6. The cutting edge can be used to cut the cellulose preform structure 2 when it has been deformed into the second configuration C2.

[0088] As described above, in different embodiments, the first mold portion 4a and / or the second mold portion 4b may include a deformation element 12, and during the molding of the cellulose product 1, the deformation element 12 applies molding pressure P on the three-dimensional cellulose preform body 2a in the molding cavity 5a. F A suitable conventional heating unit (such as one or more heated molding die sections) can be used to establish the molding temperature T. F In different embodiments, the molding pressure P F The pressure range is 1-100 MPa, preferably 4-20 MPa, and the molding temperature T F The temperature range is 100-300°C. The forming pressure P is achieved through the use of deformation element 12. F It can be uniform molding pressure, which will be described further below.

[0089] exist Figure 6 In the diagram, an alternative embodiment of the second mold portion 2b is schematically shown in an exploded view, wherein, for illustrative purposes, the molding cavity section 5 is separated from the inlet section 6 and the edge molding section 9. In this embodiment, these sections have a molding structure different from that described in the above embodiments. Figure 6 As shown, the inlet segment 6, together with the edge-forming segment 9, has a shaped V-shaped configuration, and the forming cavity segment 5 has a configuration that matches the configuration of the edge-forming segment 9. The inlet segment 6 is arranged to connect with the edge-forming segment 9, which in turn is arranged to connect with the forming cavity segment 5. In the same manner as described with respect to the above embodiments, the inlet segment 6 is configured to facilitate the displacement of the cellulose preform structure 2 into the forming cavity 5a of the forming cavity segment 5. The inlet segment 6 includes a transition surface 6a defining an inlet opening 6b. The inlet opening 6b of the inlet segment 6 has a tapered configuration toward the forming cavity 5a, and the transition surface 6a can have any suitable shape that provides the tapered configuration of the inlet opening 6b. Figure 6In the illustrated embodiment, the transition surface 6a forming the inlet opening 6b has a curved conical structure with a curved conical cross-sectional shape facing the molding cavity 5a, and the inlet opening 6b of the inlet segment 6 is in the pressing direction D facing the molding cavity 5a. P It has a tapered structure. However, other suitable cross-sectional shapes can be used if desired, and other curved shapes, as well as non-curved shapes or combinations of different shapes, can be used. Figure 6 In the illustrated embodiment, the inlet section 6 surrounds the formed cavity 5a. The edge forming section 9 includes a wall surface 9a, which has the same structure and function as described in the above embodiment.

[0090] exist Figure 6 In the illustrated embodiment, the second mold portion 4b may be provided with a molding cavity section 5, an edge molding section 9, and an inlet section 6, which are integrated into a common structural portion. Alternatively, the molding cavity section 5, the edge molding section 9, and the inlet section 6 may be arranged as two or more interconnected independent structural portions. The transition surface 6a extends from the outer mold portion 4b of the second mold portion 4b. OS The cavity inlet opening 5b extends toward the molding cavity 5a. In this embodiment, the outer mold section 4b OS It has a V-shaped structure. The cavity inlet opening 5b of the molding cavity 5a is arranged as an outer section of the molding cavity 5a, through which the cellulose preform structure 2 is inserted into the molding cavity 5a during the molding process. Figure 6 As shown, the cavity inlet opening 5b can be defined by the outer periphery 5c of the molded cavity 5a surrounding it. Figure 6 As shown, the inlet opening 6b formed by the transition surface 6a can be defined by the inner periphery 6c and the outer periphery 6d surrounding the inlet opening 6b. Therefore, the transition surface 6a extends between the outer periphery 6d and the inner periphery 6c. The wall surface 9a of the edge forming section 9 extends between the outer periphery 5c of the forming cavity 5a and the inner periphery 6c of the inlet opening 6b.

[0091] The molding die system can be designed with more than one tearing arrangement. Figure 7a In the alternative embodiment shown in -g, the molding die system 3 includes a first die portion 4a and a second die portion 4b. The first die portion 4a and the second die portion 4b are configured for use in the pressing direction D. P They move relative to each other. Figure 7a In the embodiment shown in -g, the first mold portion 4a is fixed, and the second mold portion 4b is relative to the first mold portion 4a in the pressing direction D. P It can be moved around. For example... Figure 7aAs shown in -g, in the same manner as described in the above embodiments, the second mold portion 4b includes a molding cavity section 5, an edge molding section 9, and an inlet section 6. In this embodiment, the deformable element 12 is attached to the molding cavity 5a of the second mold portion 4b. The inlet section 6 includes a transition surface 6a defining an inlet opening 6b. The transition surface 6a can be constructed as described in the above embodiments, and the inlet opening 6b of the inlet section 6 therefore has a tapered structure facing the molding cavity 5a.

[0092] like Figure 7a As shown in -g, the transition surface 6a extends from the outer mold section 4b of the second mold portion 4b. OS The cavity inlet opening 5b extends toward the molding cavity 5a. The cavity inlet opening 5b of the molding cavity 5a is arranged as an outer segment of the molding cavity 5a, through which the cellulose preform structure 2 is inserted into the molding cavity 5a during the molding process. The cavity inlet opening 5b is defined by the outer periphery of the molding cavity 5a surrounding the molding cavity 5a. The inlet opening 6b formed by the transition surface 6a is defined by the inner and outer peripheries surrounding the inlet opening 6b, wherein the transition surface 6a extends between the outer and inner peripheries.

[0093] like Figure 7a -g schematically shows that the first wall surface segment 4a1 of the first mold portion 4a and the transition surface 6a form an internal tearing arrangement 7a, which has the same structure and function as described above. During the tearing process, the cellulose preform structure 2 is separated into a cellulose preform structure portion 2b and a separated cellulose preform structure 2d. Figure 7a In the embodiment shown in -g, the first wall surface segment 4a1 is formed from the outer wall surface of the first mold portion 4a. However, it should be understood that any suitable wall surface segment of the first mold portion 4a can be used to mate with the transition surface 6a to form the inner tear arrangement 7a. During the movement of the first mold portion 4a toward the second mold portion 4b, the first wall surface segment 4a1 approaches the transition surface 6a, wherein a gap is formed between the first wall surface segment 4a1 and the transition surface 6a, the gap having the same construction and function as described above.

[0094] exist Figure 7aIn the embodiment shown in -g, the first mold portion 4a further includes a second wall surface portion 4a2 disposed outside the first wall surface portion 4a1. As shown, the second wall surface portion 4a2 forms the outer structural portion of the first mold portion 4a. The second mold portion 4b includes a third wall surface portion 4b3 disposed outside the inlet opening 6b. The second wall surface portion 4a2 and the third wall surface portion 4b3 form an external tearing arrangement 7b. The external tearing arrangement 7b is configured to pre-separate or at least partially pre-separate the cellulose preform structure 2 into pre-separated cellulose preform structures 2e between the second wall surface portion 4a2 and the third wall surface portion 4b3, and the external tearing arrangement has the same function and construction as the internal tearing arrangement 7a described above. Figure 7a As schematically shown, the second wall surface segment 4a2 is provided with an external transition surface 6a. O The external transition surface has the same tapered structure as the transition surface 6a described in the above embodiment. Using the external tearing arrangement 7b, the cellulose preform structure 2 can be completely or partially pre-separated before being torn or at least partially torn using the internal tearing arrangement 7a. This pre-separation step simplifies the displacement of the cellulose preform structure 2 into the molding cavity 5a.

[0095] like Figure 7b As shown, the cellulose preform structure 2 is arranged between the first mold portion 4a and the second mold portion 4b. Subsequently, the second mold portion 4b moves toward the first mold portion 4a, as... Figure 7c As shown, and during movement, the outer tear arrangement 7b pre-separates the cellulose preform structure 2 between the second wall surface section 4a2 and the third wall surface section 4b3. Through pre-separation, a pre-separated cellulose preform structure 2e is formed. Figure 7d As shown, after the second mold portion 4b moves further toward the first mold portion 4a, the pre-separated cellulose preform structure 2e begins to tear in the inner tearing arrangement 7a, and the tearing is then completed in the inner tearing arrangement 7a, as... Figure 7e As shown. In Figure 7f In the middle, the movement of the second mold part 4b toward the first mold part 4a is completed, and the molding temperature T is increased. F and molding pressure P F It is applied to the cellulose preform structure 2 to complete the molding of the cellulose product 1. In this step, residual cellulose 2c in the separated cellulose preform structure 2d can be evacuated using a suitable evacuation device. Figure 7gAs shown, after molding, the second mold portion 2b moves away from the first mold portion 4a and can be removed from the molding die system 3. As described above, the first mold portion 4a includes a second wall surface portion 4a2 disposed outside the first wall surface portion 4a1, and the second mold portion 4b includes a third wall surface portion 4b3 disposed outside the inlet opening 6b. The second wall surface portion 4a2 and the third wall surface portion 4b3 form an external tearing arrangement 7b. During tearing, the first mold portion 4a and / or the second mold portion 4b move along the pressing direction D. P During the movement, the cellulose preform structure 2 is pre-separated into a pre-separated cellulose preform structure 2e using the external tearing arrangement 7b between the second wall surface segment 4a2 and the third wall surface segment 4b3. This movement may depend on the configuration of the molding die system 3. The pre-separation occurs before the pre-separated cellulose preform structure 2e is at least partially torn using the internal tearing arrangement 7a.

[0096] Similar to the description above, the pre-separation, separation, or at least partial separation of the cellulose preform structure 2 into pre-separated cellulose preform structure 2e, cellulose preform structure portion 2b, and separated cellulose preform structure 2d occurs during the application of molding pressure P. F Previously, a cellulose product 1 was provided with a smooth surface structure on the side, which did not have a surface structure substantially perpendicular to the pressing direction D. P The edge extending in the direction of.

[0097] exist Figure 8 The image schematically illustrates an alternative embodiment of the external tear arrangement 7b. In this embodiment, the first mold portion 4a and the second mold portion 4b have a connection with... Figure 7a The embodiment shown in -g has a similar construction to that described. However, the first mold portion 4a is arranged without an external transition surface. Instead of an external transition surface, the first mold portion 4a includes a mold portion edge 4a arranged to connect with the second wall surface segment 4a2. E .like Figure 8 As shown, the edge 4a of the mold section E The second wall surface section 4a2 and the outer mold surface 4a are arranged in the first mold part 4a. OS Between. The third wall surface segment 4b3 of the second mold portion 4b includes a plurality of separate protrusions 15 extending around the outer periphery of the third wall surface segment 4b3, such as Figure 8 As shown schematically. In the illustrated embodiment, the separating protrusion 15 has a needle-like structure. However, the separating protrusion can have any suitable shape or structure, such as toothed. The separating protrusion 15 points in the pressing direction D. P And the separation protrusion 15 along the pressing direction D PThe third wall surface section 4b3 extends further toward the first mold section 4a beyond the outer mold section 4b. OS A movable retaining member 16 is arranged to lock the cellulose preform structure 2 in place relative to the first mold portion 4a during the molding process. The retaining member 16 pushes the cellulose preform structure 2 toward the outer mold surface 4a. OS The retaining member can be an annular structure suitable for holding the cellulose preform structure 2 in place relative to the first mold portion 4a. Before the second mold portion 4b moves toward the first mold portion 4a, the retaining member 16 moves to a position that fixes the cellulose preform structure 2 toward the first mold portion 4a. During the movement of the second mold portion 4b toward the first mold portion 4a, the separating protrusion 15 penetrates the cellulose preform structure 2. The penetration of the cellulose preform structure further locks the cellulose preform structure 2 in place relative to the mold portion. During further movement of the second mold portion 4b toward the first mold portion 4a, the separating protrusion 15 and the third wall surface segment 4b3 contact the edge 4a of the mold portion. E The second wall surface section 4a2 meets the third wall surface section 4b3. During the molding process, the molding die can be provided with a suitable gap between the second wall surface section 4a2 and the third wall surface section 4b3 to effectively tear the cellulose preform structure 2. The size of the gap can vary depending on the thickness and construction of the cellulose preform structure 2. By separating the protrusion 15 and the third wall surface section 4b3 from the edge 4a2 of the die portion, the mold can effectively tear the cellulose preform structure 2. E The interaction between the second wall surface segment 4a2 and the cellulose preform structure 2 is pre-separated by tearing using the outer tearing arrangement 7b. In this embodiment, the molding die system 3 includes an inner tearing arrangement and a combination Figure 7a -g is the same as that described in the embodiment shown.

[0098] For all embodiments, the first mold portion 4a and / or the second mold portion 4b may include a deformation element 12, as schematically shown in the figures and briefly discussed above. The deformation element 12 is configured to apply molding pressure P on the cellulose preform structure 2 in the molding cavity 5a during the molding of the cellulose product 1. F The deformable element 12 can be attached to the first mold portion 4a and / or the second mold portion 4b by suitable attachment means (such as glue or mechanical fasteners). During the molding of the cellulose product 1, the deformable element 12 deforms to apply molding pressure P to the cellulose preform structure 2. F Furthermore, through the deformation of the deformation element 12, a uniform pressure distribution can be achieved even if the cellulose product 1 has a complex three-dimensional shape or if the cellulose preform structure 2 has a varying thickness.

[0099] The deformable element 12 deforms during the molding process, and the deformable element 12 is arranged to apply molding pressure P to the cellulose preform structure 2 during the molding of the cellulose product 1. F In order to apply the required molding pressure P to the cellulose preform structure 2 F The deformable element 12 is made of a material that can deform when force or pressure is applied, such as Figure 1c For illustrative purposes, the deformable element 12 is shown to be partially deformed during the molding process. Figure 1c The dashed lines in the figure show the original shape of the deformable element 12 without any deformation. For example, the deformable element 12 can be made of an elastic material that can recover its size and shape after deformation. The deformable element 12 can further be made of a material with suitable properties that can withstand the high molding pressure P used in forming the cellulose product 1. F and molding temperature T F level.

[0100] During the molding process, the deformation element 12 deforms to apply molding pressure P to the cellulose preform structure 2. F Through deformation, a uniform pressure distribution can be achieved, even if the cellulose product 1 has a complex three-dimensional shape with cuts, openings and pores, or if the cellulose preform structure 2 used has varying density, thickness or basis weight levels.

[0101] Some elastic or deformable materials exhibit fluid-like properties when exposed to high pressure levels. If the deformable element 12 is made of such a material, a uniform pressure distribution can be achieved during the molding process, wherein the pressure applied from the deformable element 12 to the cellulose preform structure 2 is equal or substantially equal in all directions between the mold portions. A uniform fluid-like pressure distribution can be achieved when the deformable element 12 is in its fluid-like state during pressure. Therefore, by using such a material, molding pressure is applied to the cellulose preform structure 2 from all directions, and the deformable element 12 applies uniform molding pressure to the cellulose preform structure 2 in this way during the molding process of the cellulose product 1, such as... Figure 1d and Figure 3e The arrows in the diagram are shown schematically for illustrative purposes. The balanced molding pressure from the deforming element 12 establishes uniform pressure in all desired directions (e.g., perpendicular to the wall surface of the molding cavity 5a) on the cellulose preform structure 2. This balanced molding pressure provides an efficient molding process for the cellulose product 1, and allows for the production of the cellulose product 1 with high quality, even if the cellulose product 1 has a complex shape. According to this disclosure, in forming the cellulose product, for all embodiments, the molding pressure P... F It can be a uniform molding pressure of at least 1 MPa, preferably 4-20 MPa.

[0102] The deformable element 12 can be made of a suitable structure of an elastic material, wherein the material has the ability to establish uniform pressure on the cellulose preform structure 2 during the molding process. For example, the deformable element 12 can be made of a block or substantially block structure of silicone rubber, polyurethane, polychloroprene, or rubber with a Shore A hardness in the range of 20-90. Other materials used for the deformable element 12 can be, for example, suitable gel materials, liquid crystal elastomers, and MR fluids.

[0103] The deformable element 12 may also be configured as a thin film having a fluid that applies molding pressure to the cellulose preform structure 2, or alternatively, the deformable element may be configured as a thick film having one or more fluid channels inside.

[0104] In all embodiments, the sidewall segment 13 and transition surface 6a of the deformable element 12 can be arranged to form a clamping arrangement 14, such as Figure 1c For illustrative purposes only. Figure 1c In this embodiment, the deformable element 12 is attached to the first mold portion 4a. However, in other embodiments, the deformable element 12 may alternatively be attached to the second mold portion 4b. The clamping arrangement 14 is configured to clamp the cellulose preform structure 2 between the sidewall segment 13 and the transition surface 6a. Clamping the cellulose preform structure 2 using the clamping arrangement 14 between the sidewall segment 13 and the transition surface 6a can occur in the first mold portion 4a and / or the second mold portion 4b along the pressing direction D. P During movement, the cellulose preform structure 2 is supported between the compression deformation element 12 and the transition surface, facilitating its transport into the molding cavity 5a. As described above, in order to apply the required molding pressure P to the cellulose preform structure 2... F The deformable element 12 is made of a material that can deform when force or pressure is applied, such as Figure 1c The illustration is for illustrative purposes only. Figure 1c In the diagram, the deformable element 12 is partially deformed, and the original shape of the deformable element 12 is shown by dashed lines. The deformation of the deformable element 12 applies pressure to the cellulose preform structure 2, and the applied pressure compresses the cellulose preform structure 2 between the deformable element 12 and the transition surface 6a. Figure 1c In the illustrated embodiment, during the movement of the first mold portion 4a toward the molding cavity 5a, the sidewall section 13 pushes the cellulose preform structure 2 toward the transition surface 6a. Due to the closer interaction between the cellulose fibers in the cellulose preform structure 2, the compressed cellulose preform structure 2 has higher tensile strength. Therefore, the compressed cellulose preform structure 2 has improved breakage resistance when displaced into the molding cavity 5a, and due to the construction of the transition surface, the compressed cellulose preform structure 2 is less prone to breakage or cracking during transport into the molding cavity.

[0105] If the deformation element 12 and the transition surface 6a are configured such that the friction between the deformation element 12 and the cellulose preform structure 2 is higher than the friction between the transition surface 6a and the cellulose preform structure 2, the higher friction between the deformation element 12 and the cellulose preform structure 2 supports the displacement of the cellulose preform structure 2 into the molding cavity 5a during the molding process. By arranging the molding die system 3 such that the friction between the deformation element 12 and the cellulose preform structure 2 is higher than the friction between the transition surface 6a and the cellulose preform structure 2, the displacement of the cellulose preform structure 2 into the molding cavity 5 becomes more efficient. Therefore, the higher friction between the deformation element 12 and the cellulose preform structure 2 supports the displacement of the cellulose preform structure 2 into the molding cavity 5a and further supports the shaping of the cellulose preform structure 2 from the first configuration C1 to the second configuration C2. During the displacement of the cellulose preform structure 2, the lower friction between the transition surface 6a and the cellulose preform structure 2 ensures that the cellulose preform structure 2 can easily slide along the transition surface 6a into the molding cavity 5a. The less friction between the transition surface 6a and the cellulose preform structure 2, the more efficient the displacement of the cellulose preform structure 2 into the molding cavity 5a. The transition surface 6a can be coated, for example, with a low-friction material, such as PTFE.

[0106] In an alternative embodiment, the friction between the deformable element 12 and the cellulose preform structure 2 is the same as or substantially the same as the friction between the transition surface 6a and the cellulose preform structure 2, which may be suitable for certain applications. In another alternative embodiment, the friction between the deformable element 12 and the cellulose preform structure 2 is lower than the friction between the transition surface 6a and the cellulose preform structure 2.

[0107] For all embodiments, the inlet section 6 includes the outer mold section 4b. OS One or more protrusions 10 extending toward the molding cavity 5a and / or from the outer mold section 4b OS One or more grooves 11 extending toward the molding cavity 5a. One or more protrusions 10 and / or one or more grooves 11 are configured to control or manipulate the displacement of the cellulose preform structure 2 into the molding cavity 5a, and can have any suitable shape and configuration depending on the design of the mold portion. Figure 9a In the illustrated embodiment, the inlet section 6 of the second mold portion 4b includes a plurality of protrusions 10. The protrusions 10 extend from the outer mold portion 4b. OS It extends toward the molded cavity 5a and, as shown, passes through the transition surface 6a. Figure 9b In the illustrated embodiment, the inlet section 6 of the second mold portion 4b includes a plurality of grooves 11. The grooves 11 extend from the outer mold portion 4b... OSIt extends toward the formed cavity 5a and, as shown, passes through the transition surface 6a. A protrusion 10 and a groove 11 can be combined on the inlet segment 6. Figure 9c In the illustrated embodiment, the inlet section 6 of the second mold portion 4b includes a plurality of protrusions 10 and grooves 11 arranged in a wave-like pattern. The protrusions 10 and grooves 11 extend from the outer mold portion 4b. OS It extends toward the shaped cavity 5a and passes through the transition surface 6a as shown.

[0108] The molding die system 3 may further include a suitable control unit for controlling the molding of the cellulose product 1. The control unit may include suitable software and hardware for controlling the molding die system 3 and the various process and method steps performed by the molding die system 3. The control unit may, for example, control temperature, pressure, molding time, and other process parameters. The control unit may be further connected to associated process equipment, such as a pressing unit, a heating unit, a cellulose preform conveying unit, and a cellulose product conveying unit.

[0109] It should be understood that, for different embodiments of this disclosure, the pre-separation, separation or at least partial separation of the cellulose preform structure 2 into cellulose preform structure portion 2b, separated cellulose preform structure 2d and / or pre-separated cellulose preform structure 2e may occur before pressing the cellulose preform structure portion 2b into cellulose product 1.

[0110] The present disclosure has been described above with reference to specific embodiments. However, other embodiments besides those described above are also possible and are within the scope of this disclosure.

[0111] Within the scope of this disclosure, different method steps may be provided, and the method may be performed by hardware or software. Therefore, according to an exemplary embodiment, a non-transitory computer-readable storage medium is provided, the storage of which is configured to store one or more programs executed by one or more processors of a molding die system, said one or more programs including instructions for performing the method according to any of the embodiments described above. Alternatively, according to another exemplary embodiment, a cloud computing system may be configured to perform any of the method aspects presented herein. The cloud computing system may include distributed cloud computing resources that jointly execute the method aspects presented herein under the control of one or more computer program products. Furthermore, the processor may be connected to one or more communication interfaces and / or sensor interfaces for receiving and / or transmitting data with external entities, such as sensors deployed on the surface of a vehicle, an off-site server, or a cloud-based server.

[0112] One or more processors associated with the control unit and molding die may be, or include, any number of hardware components for transmitting data or processing signals or for executing computer code stored in memory. The system may have associated memory, and this memory may be one or more means for storing data and / or computer code used to perform or facilitate the various methods described herein. The memory may include volatile or non-volatile memory. The memory may include data components, object code components, script components, or any other type of information structure used to support the various activities described herein. According to exemplary embodiments, any distributed or local memory device may be used with the systems and methods described herein. According to exemplary embodiments, the memory may be communicatively connected to the processor (e.g., via circuitry or any other wired, wireless, or network connection) and includes computer code for performing one or more processes described herein.

[0113] It should be understood that the above description is merely exemplary in nature and is not intended to limit this disclosure, its application, or its use. While specific examples have been described in the specification and illustrated in the accompanying drawings, those skilled in the art will understand that various changes can be made and equivalents can be substituted for elements thereunder without departing from the scope of the invention. Furthermore, modifications can be made to adapt particular situations or materials to the teachings of this disclosure without departing from the basic scope of the disclosure.

[0114] Therefore, the intent of this disclosure is not limited to the specific examples shown in the accompanying drawings and described in the specification as the best mode currently expected for implementing the teachings of this disclosure.

[0115] Figure Labels

[0116] 1: Cellulose products

[0117] 1a: Edge, cellulose products

[0118] 2: Cellulose preform structure

[0119] 2a: Cellulose preform body

[0120] 2b: Cellulose preform structure

[0121] 2c: Residual cellulose

[0122] 2d: Separated cellulose preform structure

[0123] 2e: Structure of pre-separated cellulose preform

[0124] 3: Molding mold system

[0125] 4a: First mold part

[0126] 4a1: First wall surface section

[0127] 4a2: Second wall surface section

[0128] 4a E edge of mold section

[0129] 4a OS : outer mold surface

[0130] 4b: Second mold section

[0131] 4b3: Third wall surface section

[0132] 4b OS External mold section

[0133] 5: Molded cavity section

[0134] 5a: Molded cavity

[0135] 5b: Cavity inlet opening

[0136] 5c: Outer periphery, forming cavity

[0137] 6: Entrance section

[0138] 6a: Transition surface

[0139] 6b: Entrance opening

[0140] 6c: Inner perimeter, entrance opening

[0141] 6d: Outer perimeter, entrance opening

[0142] 7a: Inner tear-open arrangement

[0143] 7b: External tear-off arrangement

[0144] 8a: First surface section

[0145] 8b: Second surface section

[0146] 9: Edge forming section

[0147] 9a: Wall surface

[0148] 9b: Opening

[0149] 9c: Inner perimeter, opening

[0150] 9d: Outer perimeter, opening

[0151] 10: Protrusion

[0152] 11: Groove

[0153] 12: Deformable element

[0154] 13: Side wall section

[0155] 14: Compressed Arrangement

[0156] 15: Separation protrusion

[0157] 16: Retaining components

[0158] D P : Pressing direction

[0159] P F Molding pressure

[0160] T F Molding temperature

[0161] C1: First configuration

[0162] C2: Second configuration

Claims

1. A molding die system (3) for forming a cellulose product (1) from an air-formed cellulose preform structure (2), wherein, The molding die system (3) includes a first die part (4a) and a second die part (4b), wherein the first die part (4a) and the second die part (4b) are configured for use in the pressing direction (D) P ) moves relative to each other, The second mold portion (4b) includes a molding cavity section (5) and an inlet section (6), wherein the inlet section (6) is arranged to connect to the molding cavity section (5) and is configured to facilitate the displacement of the cellulose preform structure (2) into the molding cavity (5a) of the molding cavity section (5). The inlet section (6) includes a transition surface (6a) defining an inlet opening (6b), wherein the inlet opening (6b) has a tapered structure facing the molded cavity (5a). In this embodiment, the first wall surface segment (4a1) of the first mold portion (4a) and the transition surface (6a) form an inner tearing arrangement (7a), wherein a gap (G) is formed between the first wall surface segment (4a1) and the transition surface (6a), the gap (G) having a narrowing structure, wherein the inner tearing arrangement (7a) is configured to, during the movement of the first mold portion and / or the second mold portion (4b) along the pressing direction, tear the cellulose preform structure (2) in the narrowed gap (G) between the first wall surface segment (4a1) and the transition surface (6a) to at least partially separate the cellulose preform structure portion (2b) from the cellulose preform structure (2).

2. The molding die system (3) according to claim 1. in, The transition surface (6a) extends from the outer mold section (4b) of the second mold portion (4b). OS ) extends toward the cavity inlet opening (5b) of the shaped cavity (5a).

3. The molding die system (3) according to claim 1. in, The first mold portion (4a) includes a second wall surface portion (4a2) arranged outward from the first wall surface portion (4a1), wherein the second mold portion (4b) includes a third wall surface portion (4b3) arranged outward from the inlet opening (6b), wherein the second wall surface portion (4a2) and the third wall surface portion (4b3) form an external tear arrangement (7b), wherein the external tear arrangement (7b) is configured to pre-separate the cellulose preform structure (2) between the second wall surface portion (4a2) and the third wall surface portion (4b3).

4. The molding die system (3) according to any one of claims 1 to 3. in, The transition surface (6a) has a curved conical structure.

5. The molding die system (3) according to claim 2. in, The transition surface (6a) includes a portion extending from the outer mold section (4b) in a direction toward the molding cavity (5a). OS The first surface segment (8a) extends from the first surface segment (8a) and the second surface segment (8b) extends from the first surface segment (8a) in the direction toward the molded cavity (5a).

6. The molding die system (3) according to claim 5. in, The first surface segment (8a) has a curved conical structure, and the second surface segment (8b) has a curved conical structure or a truncated conical structure.

7. The molding die system (3) according to any one of claims 1 to 3. in, The second mold portion (4b) further includes an edge forming section (9) configured to preform the cellulose preform structure portion (2b) and form the edge (1a) of the cellulose product (1), wherein the edge forming section (9) is arranged between the inlet section (6) and the forming cavity section (5).

8. The molding die system (3) according to claim 7. in, The edge forming section (9) includes a wall surface (9a), wherein the wall surface (9a) connects the inlet section (6) and the forming cavity section (5), wherein the wall surface (9a) is located between the inlet section (6) and the forming cavity section (5) in the pressing direction (D). P Extending upwards.

9. The molding die system (3) according to claim 2. in, The inlet section (6) includes the outer mold section (4b) OS One or more protrusions (10) extending toward the molding cavity (5a) and / or from the outer mold section (4b) OS One or more grooves (11) extending toward the molding cavity (5a), wherein the one or more protrusions (10) and / or the one or more grooves (11) are configured to control the displacement of the cellulose preform structure (2) into the molding cavity (5a).

10. The molding die system (3) according to any one of claims 1-3. in, The entrance section (6) is arranged as an integral structure of the second mold section (4b).

11. The molding die system (3) according to claim 1. in, The first mold portion (4a) and / or the second mold portion (4b) include a deformation element (12), wherein the deformation element (12) is configured to apply molding pressure (P) on the cellulose preform structure (2) in the molding cavity (5a). F ).

12. The molding die system (3) according to claim 11. in, The molding pressure (P) F (In the range of 1-100MPa) 13. The molding die system (3) according to claim 11 or 12. in, The molding pressure (P) F ( ) is the equalization molding pressure.

14. The molding die system (3) according to any one of claims 11 to 12. in, The sidewall section (13) of the deformable element (12) and the transition surface (6a) form a pressing arrangement (14), wherein the pressing arrangement (14) is configured to press the cellulose preform structure (2) between the sidewall section (13) and the transition surface (6a).

15. A method for forming a cellulose product (1) from a cellulose preform structure (2) formed by air molding in a molding die system (3), wherein, The molding die system (3) includes a first die part (4a) and a second die part (4b), wherein the first die part (4a) and the second die part (4b) are aligned in the pressing direction (D). P The two mold portions (4b) are movably arranged relative to each other, wherein the second mold portion (4b) includes a molding cavity section (5) and an inlet section (6), wherein the inlet section (6) is arranged to connect with the molding cavity section (5) and is configured to facilitate the displacement of the cellulose preform structure (2) into the molding cavity (5a) of the molding cavity section (5), wherein the inlet section (6) includes a transition surface (6a) defining an inlet opening (6b), wherein the inlet opening (6b) has a tapered structure toward the molding cavity (5a), wherein the method includes the following steps: The air-formed cellulose preform structure (2) is provided, and the cellulose preform structure (2) is supplied to the molding die system (3). At a position between the first mold portion (4a) and the second mold portion (4b), the cellulose preform structure (2) is arranged in the first configuration (C1) to connect with the inlet section (6); In the pressing direction (D) P The first mold portion (4a) and / or the second mold portion (4b) are moved on the mold, and the cellulose preform structure (2) is displaced into the molding cavity (5a) using the first mold portion (4a), and during the displacement of the cellulose preform structure (2), the forming of the cellulose preform structure (2) from the first configuration (C1) to the second configuration (C2) is controlled, wherein the cellulose preform structure (2) in the second configuration (C2) is formed into a three-dimensional cellulose preform body (2a). By heating the three-dimensional cellulose preform body (2a) to the molding temperature (T) F And utilize molding pressure (P) F The cellulose product (1) is formed by pressing the three-dimensional cellulose preform body (2a) in the molding cavity (5a) between the first mold part (4a) and the second mold part (4b). In this configuration, the first wall surface segment (4a1) of the first mold portion (4a) and the transition surface (6a) form an internal tear arrangement (7a), wherein a gap (G) is formed between the first wall surface segment (4a1) and the transition surface (6a), and the gap (G) has a narrowing structure. The method further includes the following steps: along the pressing direction (D) of the first mold portion (4a) and / or the second mold portion (4b). P During the movement of the cellulose preform structure (2), the cellulose preform structure is at least partially torn in the narrowed gap (G) by utilizing the inner tearing arrangement (7a) between the first wall surface segment (4a1) and the transition surface (6a).

16. The method according to claim 15, in, The method includes the following steps: during the tearing of the cellulose preform structure (2), at least partially separating a cellulose preform structure portion (2b) from the cellulose preform structure (2), wherein the at least partially separated cellulose preform structure portion (2b) forms a three-dimensional cellulose preform body (2a) in the second configuration (C2).

17. The method according to claim 15 or 16, in, The first mold portion (4a) includes a second wall surface portion (4a2) arranged outward from the first wall surface portion (4a1), wherein the second mold portion (4b) includes a third wall surface portion (4b3) arranged outward from the inlet opening (6b), wherein the second wall surface portion (4a2) and the third wall surface portion (4b3) form an external tearing arrangement (7b), wherein the method includes the following steps: before at least partially tearing the cellulose preform structure (2) using the internal tearing arrangement (7a), along the pressing direction (D) of the first mold portion (4a) and / or the second mold portion (4b). P During the movement of the cellulose preform structure (2), the cellulose preform structure (2) is pre-separated by an external tearing arrangement (7b) between the second wall surface section (4a2) and the third wall surface section (4b3).

18. The method according to any one of claims 15 to 16, in, The first configuration (C1) of the cellulose preform structure (2) is a flat shape.

19. The method according to any one of claims 15 to 16, in, The method includes the following steps: shaping the three-dimensional cellulose preform (2a) into a folded three-dimensional structure in the second configuration (C2).

20. The method according to any one of claims 15 to 16, in, The method includes the following steps: compressing the cellulose preform structure (2) during the shift of the cellulose preform structure (2) from the first configuration (C1) to the second configuration (C2).

21. The method according to any one of claims 15 to 16, in, The first mold portion (4a) and / or the second mold portion (4b) include a deformation element (12), wherein the method includes the following steps: during the molding of the cellulose product (1), applying molding pressure (P) to the three-dimensional cellulose preform body (2a) in the molding cavity (5a) using the deformation element (12). F ).

22. The method according to claim 21, in, The sidewall section (13) of the deformable element (12) and the transition surface (6a) form a pressing arrangement (14), wherein the method includes the following steps: along the pressing direction (D) on the first mold portion (4a) and / or the second mold portion (4b). P During the movement of the ), the cellulose preform structure (2) is pressed between the sidewall section (13) and the transition surface (6a) by the pressing arrangement (14).

23. The method according to claim 21, in, The method includes the following steps: setting the molding die system (3) by friction between the deformable element (12) and the cellulose preform structure (2), the friction being higher than the friction between the transition surface (6a) and the cellulose preform structure (2), wherein the higher friction between the deformable element (12) and the cellulose preform structure (2) supports the displacement of the cellulose preform structure (2) into the molding cavity (5a) and the shaping of the cellulose preform structure (2) from the first configuration (C1) to the second configuration (C2).

24. The method according to any one of claims 15 to 16, in, The molding pressure (P) F The pressure is in the range of 1-100 MPa, and the molding temperature (T) is within this range. F (In the range of 100-300°C) 25. The method according to any one of claims 15 to 16, in, The molding pressure (P) F ( ) is the equalization molding pressure.

26. The method according to any one of claims 15 to 16, The following steps are included: - Along the pressing direction (D) in the first mold portion (4a) and / or the second mold portion (4b) P During the movement, the cellulose preform structure (2) is at least partially torn apart by the inner tearing arrangement (7a) between the first wall surface segment (4a1) and the transition surface (6a). This occurs before the following steps: - By heating the three-dimensional cellulose preform body (2a) to the molding temperature (T F And utilize molding pressure (P) F The cellulose product (1) is formed by pressing the three-dimensional cellulose preform body (2a) in the molding cavity (5a) between the first mold part (4a) and the second mold part (4b).

27. The method according to claim 16, The following steps are included: -During the tearing of the cellulose preform structure (2), at least partially separate the cellulose preform structure portion (2b) from the cellulose preform structure (2). This occurs before the following steps: - By heating the three-dimensional cellulose preform body (2a) to the molding temperature (T F And utilize molding pressure (P) F The three-dimensional cellulose preform body (2a) is pressed in the molding cavity (5a) between the first mold part (4a) and the second mold part (4b) to form the cellulose product (1).

28. The method according to claim 17, The following steps are included: Before at least partially tearing the cellulose preform structure (2) using the inner tearing arrangement (7a), the first mold portion (4a) and / or the second mold portion (4b) are in the pressing direction (D) P During the movement of the cellulose preform structure (2), the cellulose preform structure (2) is pre-separated by an external tearing arrangement (7b) between the second wall surface section (4a2) and the third wall surface section (4b3). This occurs before the following steps: - By heating the three-dimensional cellulose preform body (2a) to the molding temperature (T F And utilize molding pressure (P) F The cellulose product (1) is formed by pressing the three-dimensional cellulose preform body (2a) in the molding cavity (5a) between the first mold part (4a) and the second mold part (4b).

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