A method for edge shaping of a cellulosic product in a shaping die system and a shaping die system for forming the edge of a cellulosic product

Abstract

A method for edge forming a cellulose product in a forming die system and a forming die system (S), wherein the forming die system is suitable for forming a cellulose product from an air-formed cellulose blank structure (2). The forming die system comprises a first die part (3) and a second die part (4) arranged to cooperate with each other. The first die part comprises an edge forming device (5) having a protruding element (5a), which is configured to compact and separate the fibers of the cellulose blank structure. The edge forming device is movably arranged relative to a base structure (3a) of the first die part, and the edge forming device is suitable for interacting with a pressure member (6) arranged in the base structure. The method comprises the following steps: providing an air-formed cellulose blank structure and arranging the cellulose blank structure between the first die part and the second die part; compacting the cellulose blank structure by separating the fibers of the cellulose blank structure using the protruding elements, applying an edge forming temperature to the cellulose blank structure and applying an edge forming pressure to the cellulose blank structure between the protruding elements and the second die part by means of the pressure member, thereby forming a compacted edge structure of the cellulose product.

Description

Technical Field

[0001] The present disclosure relates to a method for edge forming a cellulosic product in a forming die system, wherein the forming die system is adapted to form the cellulosic product from an air-formed cellulosic blank structure. The forming die system includes a first die portion and a second die portion, the first die portion and the second die portion being arranged to cooperate with each other. The present disclosure further relates to a forming die system for forming an edge of a cellulosic product. Background Art

[0002] Cellulose fibers are commonly used as a raw material for producing or manufacturing products. Products formed from cellulose fibers can be used in many different situations where it is desirable to have sustainable products. Cellulose fibers can be used to produce a wide variety of products, and some examples include disposable plates and cups, cutlery, lids, bottle caps, coffee pods, and packaging materials.

[0003] Forming dies are commonly used when manufacturing cellulose products from raw materials containing cellulose fibers, and cellulose products are traditionally produced using wet forming techniques. A common material used for wet-formed cellulose fiber products is wet-molded pulp. Wet-molded pulp has the advantage of being considered a sustainable packaging material because it is produced from biomass and can be recycled after use. Consequently, wet-molded pulp has rapidly gained popularity in various applications. Wet-molded pulp products are typically formed by submerging a suction forming die into a liquid or semi-liquid pulp suspension or slurry containing cellulose fibers. When suction is applied, the fibers are deposited onto the forming die, and the pulp body is formed into the shape of the desired product. All wet forming techniques require drying the wet-molded product, which is a very time-consuming and energy-intensive process. The demands on the aesthetic, chemical, and mechanical properties of cellulose products are increasingly stringent. However, due to the characteristics of wet-molded cellulose products, mechanical strength, flexibility, material thickness, and chemical properties are limited. High-precision control of the product's mechanical properties is also difficult during the wet forming process.

[0004] One advancement in the field of producing cellulose products is the formation of cellulose fibers without the use of wet forming techniques. Instead of forming the cellulose product from a liquid or semi-liquid pulp suspension or slurry, an air-formed cellulose blank structure is used to form the cellulose product. The air-formed cellulose blank structure is inserted into a forming die, and during the forming of the cellulose product, the cellulose blank structure is subjected to high forming pressures and high forming temperatures, for example, by using standard pressing equipment. When using this forming method, the edge structure of the formed cellulose product has a higher tendency to absorb moisture than the rest of the product, which can weaken the product's construction. In addition, if the cellulose product is composed of different material layers, the materials may easily delaminate at the edge structure, especially if exposed to moisture. Another problem is that when forming edges in a forming die using traditional cutting tools, the tolerance acceptance is very small, and this is particularly problematic in multi-cavity forming dies, where multiple products are formed in a single forming step, where the cut edges of the forming die sections overlap. This cutting process can also cause the cellulose fibers in the edges of the product to become loose.

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

[0006] It is an object of the present disclosure to provide a method for edge profiling of a cellulosic product in a profiling die system and a profiling die system for forming the edge of a cellulosic product, wherein the previously mentioned problems are avoided.

[0007] The present disclosure relates to a method for edge forming a cellulosic product in a forming die system, wherein the forming die system is adapted to form the cellulosic product from an air-formed cellulosic blank structure. The forming die system comprises a first die portion and a second die portion, which are arranged to cooperate with each other. The first die portion comprises an edge forming device having a protruding element, which is configured to compact and separate the fibers of the cellulosic blank structure. The edge forming device is movably arranged relative to a base structure of the first die portion, and the edge forming device is adapted to interact with a pressure member arranged in the base structure. The method comprises the following steps: providing an air-formed cellulosic blank structure and arranging the cellulosic blank structure between the first die portion and the second die portion; compacting the cellulosic blank structure by separating the fibers of the cellulosic blank structure using the protruding elements, applying an edge forming temperature to the cellulosic blank structure and applying an edge forming pressure to the cellulosic blank structure between the protruding elements and the second die portion by means of the pressure member, thereby forming a compacted edge structure of the cellulosic product.

[0008] The advantage of these features is that they form highly compressed edge sections on the cellulose product, preventing delamination of the edge sections and loosening of fibers within the edge sections. Furthermore, the resulting edge sections, with their highly compressed cellulose blank structure, tend to absorb less moisture. The interaction between the edge forming device and the second mold section allows the forming mold system to be simpler in construction and have better tolerances. The interaction between the pressure member and the second mold section allows for alignment variations between the mold sections during the edge forming operation. This also results in a cheaper and easier-to-maintain construction.

[0009] According to one aspect of the present disclosure, the forming mold system includes a heating unit. The method further includes the steps of applying an edge forming temperature level in the range of 50-300°C, preferably in the range of 100-300°C, to the cellulose blank structure using the heating unit, and applying an edge forming pressure level of at least 10 MPa, preferably in the range of 10-4000 MPa, or more preferably in the range of 100-4000 MPa, to the cellulose blank structure using the pressure member. The heating unit heats the cellulose blank structure to the desired edge forming temperature and can, for example, be arranged in the mold section for heating the cellulose blank structure during the forming process.

[0010] According to another aspect of the present disclosure, the method further comprises the step of applying an edge forming temperature to the cellulose blank structure using the protruding element and / or the second mold portion. By applying heat from the protruding element and / or the second mold portion to the cellulose blank structure, effective heat transfer to the cellulose blank structure is achieved.

[0011] According to one aspect of the present disclosure, a forming mold system includes a stop member arranged on the first mold part and / or the second mold part. The method further includes the step of preventing contact between the protruding element and the second mold part by means of the stop member during the forming process of the compacted edge structure. The stop member prevents contact between the protruding element and the second mold part to achieve an efficient edge forming process. In an operating state of the forming mold system, a gap is formed between the protruding element and the second mold part, wherein the stop member prevents further displacement of the protruding element and the second mold part toward each other.

[0012] According to another aspect of the present invention, the method further includes the step of establishing an edge forming pressure on the cellulose blank structure when the edge forming device is moved relative to the base structure by interaction from the pressure member. The edge forming pressure applied to the cellulose blank structure can be effectively controlled by the movement of the edge forming device to achieve an edge forming process with a high-quality formed edge.

[0013] According to another aspect of the present disclosure, the pressure member comprises one or more springs arranged between the base structure and the edge forming device. The one or more springs establish an edge forming pressure on the cellulose blank structure between the protruding element and the second mold part. The one or more springs effectively control the edge forming pressure and are suitable for acting as a pressure member by interaction with the movably arranged edge forming device. When the first mold part and the second mold part cooperate with each other during the forming of the cellulose product, the one or more springs establish a determined edge forming pressure applied to the cellulose blank structure. The movable arrangement of the edge forming device relative to the base structure controls the forming pressure together with the one or more springs.

[0014] According to one aspect of the present disclosure, the pressure member comprises a hydraulic pressure unit. The hydraulic pressure unit comprises a pressure chamber arranged between the base structure and the edge forming device. The hydraulic pressure unit establishes an edge forming pressure on the cellulose blank structure between the protruding element and the second mold part. The hydraulic pressure unit is suitable for use as an alternative pressure member by interaction with the movably arranged edge forming device. When the first mold part and the second mold part cooperate with each other during the forming of the cellulose product, the hydraulic pressure unit establishes a determined edge forming pressure applied to the cellulose blank structure. The hydraulic pressure unit is used to apply hydraulic pressure to the edge forming device to establish the determined edge forming pressure. When the edge forming device is moved in the direction towards the second mold part by the hydraulic pressure, the edge forming pressure is established in a precise and effective manner.

[0015] According to another aspect of the present disclosure, the pressure member includes one or more latching mechanisms arranged in the base structure. The one or more latching mechanisms are configured to interact with the edge forming device to establish edge forming pressure on the cellulose blank structure between the protruding element and the second mold part. The method further includes the steps of: applying an applied force to the edge forming device through the second mold part; and releasing the one or more latching mechanisms when the applied force is equal to or greater than a predetermined release force to allow movement of the edge forming device relative to the base structure. With this system configuration, the edge forming pressure can be effectively controlled by the pressure member, and the release function of the one or more latching mechanisms allows the edge forming operation to occur before the product forming operation, and when the edge structure of the cellulose product has been formed, the edge forming pressure is released by the release function, and more available total forming mold system pressure can be used in subsequent product forming operation steps.

[0016] The present disclosure further relates to a forming die system for forming an edge of a cellulose product, wherein the forming die system is suitable for forming a cellulose product from an air-formed cellulose blank structure. The forming die system includes a first die portion and a second die portion, which are arranged to cooperate with each other. The first die portion includes an edge forming device having a protruding element, the protruding element being configured to compact and separate the fibers of the cellulose blank structure, and the edge forming device being movably arranged relative to a base structure of the first die portion. The edge forming device is suitable for interacting with a pressure member arranged in the base structure. The forming die system is configured to form a compacted edge structure of the cellulose product by separating the fibers of the cellulose blank structure using the protruding elements, applying an edge forming temperature to the cellulose blank structure, and compacting the cellulose blank structure by applying an edge forming pressure to the cellulose blank structure between the protruding elements and the second die portion by means of the pressure member. With this configuration of the forming die system, a highly compressed edge segment is formed on the cellulose product, wherein delamination of the edge segment and loosening of the fibers in the edge segment are prevented. Furthermore, the resulting edge segments, with their highly compressed cellulose blank structure, tend to absorb less moisture. Through the interaction between the edge shaping device and the second mold part, the molding die system can be constructed more simply and with better tolerances. This also results in a cheaper construction and easier maintenance.

[0017] According to one aspect of the present disclosure, the forming mold system further includes a heating unit. The heating unit is configured to apply an edge forming temperature level in the range of 50-300°C, preferably in the range of 100-300°C, to the cellulose blank structure, and the pressure member is configured to apply an edge forming pressure level of at least 10 MPa, preferably in the range of 10-4000 MPa, or more preferably in the range of 100-4000 MPa, to the cellulose blank structure. The heating unit heats the cellulose blank structure to the desired edge forming temperature and can be arranged, for example, in the mold section for heating the cellulose blank structure during the forming process.

[0018] According to another aspect of the present disclosure, the heating unit is configured to apply an edge forming temperature to the cellulose blank structure via the protruding element and / or the second mold portion.By these configurations, an efficient heat transfer to the cellulose blank structure is achieved.

[0019] According to another aspect of the present disclosure, the forming mold system includes a stop member disposed on the first mold section and / or the second mold section. The stop member is configured to prevent contact between the protruding element and the second mold section during forming of the compacted edge structure, thereby achieving an efficient edge forming process. In an operating state of the forming mold system, a gap is formed between the protruding element and the second mold section, wherein the stop member prevents further displacement of the protruding element and the second mold section toward each other.

[0020] According to one aspect of the present disclosure, the protruding element includes an edge segment facing the second mold portion. The edge segment, together with the second mold portion, is configured to form a high-pressure region in the cellulose blank structure between the protruding element and the second mold portion during forming of the compacted edge structure. The edge segment is used to establish a high edge forming pressure on the cellulose blank structure to form a highly compacted edge structure with a high finish.

[0021] According to another aspect of the present disclosure, the second mold section includes a high-pressure surface facing the edge segment. The high-pressure surface, together with the protruding element, is configured to form a high-pressure zone during the formation of the compacted edge structure. The high-pressure surface prevents damage to the mold section, enabling efficient formation of the cellulosic product. The high-pressure surface is suitably flat and / or flush with adjacent surrounding surfaces of the second mold section.

[0022] According to one aspect of the present disclosure, the forming die system is configured to establish edge forming pressure when the edge forming device moves relative to the base structure through interaction from the pressure member. The applied edge forming pressure can be effectively controlled by the movement of the edge forming device.

[0023] According to another aspect of the present disclosure, the pressure member comprises one or more springs arranged between the base structure and the edge forming device. The one or more springs effectively control the edge forming pressure. The one or more springs are adapted to act as the pressure member by interacting with the movably arranged edge forming device. When the first mold part and the second mold part cooperate with each other during the forming of the cellulose product, the one or more springs establish a determined edge forming pressure applied to the cellulose blank structure. The movable arrangement of the edge forming device relative to the base structure controls the forming pressure together with the one or more springs.

[0024] According to another aspect of the present disclosure, the pressure member comprises a hydraulic pressure unit, wherein the hydraulic pressure unit comprises a pressure chamber arranged between the base structure and the edge forming device. The hydraulic pressure unit is suitable for use as an alternative pressure member by interaction with the movably arranged edge forming device. When the first mold part and the second mold part cooperate with each other during the forming of the cellulose product, the hydraulic pressure unit establishes a determined edge forming pressure applied to the cellulose blank structure. The hydraulic pressure unit is used to apply hydraulic pressure to the edge forming device to establish the determined edge forming pressure. When the edge forming device is moved in the direction towards the second mold part by the hydraulic pressure, the edge forming pressure is established in a precise and effective manner.

[0025] According to one aspect of the present disclosure, the pressure member includes one or more detent mechanisms arranged in the base structure, wherein the one or more detent mechanisms are configured to interact with the edge forming device. The one or more detent mechanisms are suitable as an alternative pressure member for effectively controlling the edge forming pressure.

[0026] According to another aspect of the present disclosure, the base structure comprises an inner forming mould section, wherein the edge forming device extends around the inner forming mould section.With this configuration, the edge forming device is able to form the edge structure of the cellulosic product in a simple and effective manner. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The present disclosure will be described in detail below with reference to the accompanying drawings, in which

[0028] Figure 1 Schematically shows a first mold part with an edge forming device of a forming mold system according to the present disclosure in a perspective cross-sectional view,

[0029] Figure 2a -d schematically shows a forming die system with an edge forming device according to the present disclosure in a cross-sectional side view,

[0030] Figure 3a -e schematically shows in cross-sectional side view a protruding element of an edge profiling device in different edge profiling positions according to an embodiment of the present disclosure,

[0031] Figure 4 A forming die system with an edge forming device according to another embodiment of the present disclosure is schematically shown in a cross-sectional side view,

[0032] Figure 5 The invention schematically shows an edge forming device in a first mold part of a molding mold system having a multi-cavity structure according to another embodiment of the present disclosure in a perspective view.

[0033] Figure 6Schematically showing a protruding element with an edge section of an edge shaping device according to another embodiment of the present disclosure in a cross-sectional side view,

[0034] Figure 7a -c schematically illustrates a forming die system with an edge forming device according to another embodiment of the present disclosure in a cross-sectional side view, and

[0035] Figure 8a -b schematically illustrates a forming die system with an edge forming device according to another embodiment of the present disclosure in a cross-sectional side view. DETAILED DESCRIPTION

[0036] Various aspects of the present disclosure will be described below in conjunction with the accompanying drawings to illustrate the present disclosure and not to limit the present disclosure, wherein like reference numerals represent like elements, and variations of the described aspects are not limited to the specifically shown embodiments, but may be applied to other variations of the present disclosure.

[0037] Those skilled in the art will understand that the steps, services, and functions explained herein may be implemented, at least in part, using separate hardware circuits, using software functions in conjunction with a programmed microprocessor or general-purpose computer, using one or more application-specific integrated circuits (ASICs), and / or using one or more digital signal processors (DSPs). It will also be understood that when the present disclosure is described in terms of a method, it may also be embodied in one or more processors and one or more memories coupled to the one or more processors, wherein the one or more memories store one or more programs that, when executed by the one or more processors, perform the steps, services, and functions disclosed herein.

[0038] The present disclosure relates to a method for edge forming of a cellulose product 1 in a forming die system S and a forming die system S for forming the edge of a cellulose product 1. The forming die system S is adapted to form a cellulose product 1 from an air-formed cellulose blank structure 2. Figure 1 and Figure 2a -d schematically shows a first exemplary embodiment of the forming die system S. Figure 4 、 Figure 5 、 Figure 7a -c and Figure 8a An alternative exemplary embodiment of a forming die system S is schematically shown in FIG-b. Figure 3a -e and Figure 6 , details of the system in different embodiments are schematically shown.

[0039] The air-formed cellulose blank structure 2 according to the present disclosure refers to a fiber web structure produced from cellulose fibers. The air forming of the cellulose blank structure 2 refers to the formation of the cellulose blank structure in a dry forming process, in which the cellulose fibers are air-formed to produce the cellulose blank structure 2. When the cellulose blank structure 2 is formed in the air forming process, the cellulose fibers are carried by air as a carrier medium and formed into the fiber blank structure 2. This is different from ordinary papermaking processes or traditional wet forming processes, in which water is used as a carrier medium for the cellulose fibers when forming paper or fiber structures. During the air forming process, if necessary, a small amount of water or other substances can be added to the cellulose fibers to change the characteristics of the cellulose product, but air is still used as a carrier medium during the forming process. If appropriate, the cellulose blank structure 2 can have a dryness corresponding primarily to the ambient humidity in the atmosphere surrounding the air-formed cellulose blank structure 2. As an alternative, the dryness of the cellulose blank structure 2 can be controlled so as to have a suitable dryness level when forming the cellulose product 1.

[0040] The air-formed cellulose blank structure 2 can be formed from cellulose fibers in a conventional air-forming process and configured in different ways. For example, depending on the desired properties of the cellulose product 1, the cellulose blank structure 2 can have a composition in which the fibers are of the same origin or alternatively comprise a mixture of two or more types of cellulose fibers. The cellulose fibers used in the cellulose blank structure 2 are firmly bound to each other by hydrogen bonds during the forming process of the cellulose product 1. The cellulose fibers can be mixed with other substances or compounds up to a certain amount, which will be further described below. Cellulose fibers refer to any type of cellulose fibers, such as natural cellulose fibers or artificial cellulose fibers. The cellulose blank structure 2 can specifically include at least 95% cellulose fibers or more specifically include at least 99% cellulose fibers.

[0041] The cellulose blank structure 2 of air forming can have single-layer structure or multi-layer structure.Cellulose blank structure 2 with single-layer structure refers to the cellulose blank structure formed by a layer comprising cellulose fiber.Cellulose blank structure 2 with multi-layer structure refers to the cellulose blank structure formed by two or more layers comprising cellulose fiber, wherein these layers can have the same or different composition or structure.Cellulose blank structure 2 can include a reinforcing layer comprising cellulose fiber, wherein the reinforcing layer is arranged as the load-bearing layer of other layers of cellulose blank structure 2.Reinforcing layer can have a higher tensile strength than other layers of cellulose blank structure 2.When one or more layers of cellulose blank structure 2 have a composition with low tensile strength, this is useful, so as to avoid cellulose blank structure 2 from breaking during the forming of cellulose product 1.Reinforcing layer with higher tensile strength serves as the support structure of other layers of cellulose blank structure 2 in this way.Reinforcing layer can, for example, be a tissue layer comprising cellulose fiber, an air-laid structure comprising cellulose fiber or other suitable layer structures.

[0042] The air-formed cellulose blank structure 2 is a loose and air-permeable structure in which the cellulose fibers forming the structure are relatively loosely arranged relative to each other. The loose cellulose blank structure 2 is used for efficient forming of the cellulose product 1, thereby allowing the cellulose fibers to be formed into the cellulose product 1 in an efficient manner during the forming process.

[0043] like Figure 1 and Figure 2a As shown in FIG. 1 , the multi-cavity forming mold system S comprises a first mold part 3 and a second mold part 4 , which are arranged to cooperate with each other in forming the cellulose product 1 and in forming the edges of the cellulose product 1 .

[0044] The first mold part 3 and the second mold part 4 are movably arranged relative to each other, and the first mold part 3 and the second mold part 4 are configured to move in the pressing direction D P On the move relative to each other. Figure 1 and Figure 2a In the embodiment shown in FIG-d, the first mold part 3 is fixed, and the second mold part 4 is relative to the first mold part 3 in the pressing direction D. P It can be arranged movably on the Figure 2a As shown by the double arrow in FIG. 1 , the second mold part 4 is configured to be pressed along the pressing direction D P The axis extending upwardly from the second mold part 4 moves in a linear manner towards and away from the first mold part 3. In alternative embodiments, the second mold part 4 may be fixed and the first mold part 3 may be movably arranged relative to the second mold part 4, or the two mold parts may be movably arranged relative to each other.

[0045] It should be understood that for all embodiments according to the present disclosure, in the pressing direction D P The expression of the upward movement includes the movement along the pressing direction D P The expression further includes linear and nonlinear movements of the mold part for all embodiments, wherein the result of the movement during forming is that the mold part moves in the pressing direction D. P Repositioning on.

[0046] like Figure 1 、 Figure 2a -d, Figure 3a -e and Figure 6 As schematically shown in FIG, the first mold part 3 comprises an edge forming device 5. The edge forming device 5 comprises a protruding element 5a, which is configured to compact and separate the fibers 2a of the cellulose blank structure 2. The protruding element 5a is arranged with an edge section 5b facing the second mold part 4. Figure 1 As shown in , the protruding element 5a is suitably arranged as a continuous element extending around the edge forming device 5, wherein the protruding element 5a has a circular extension corresponding to the edge shape or outer contour of the cellulose product 1 produced in the forming die system S. However, it will be understood that the protruding element 5a may have any suitable extension, such as a non-continuous extension, depending on the shape of the cellulose product 1 to be formed. Figure 2a -d and Figure 3a As shown in FIG-e, the protruding element 5a further has a pointed cross-sectional configuration with an edge section 5b, or as shown in FIG-e. Figure 6 , the protruding element instead has an edge section 5b with a flat upper surface 5e. In other embodiments not shown, the protruding element 5a with the edge section 5b can have other suitable cross-sectional configurations, such as a rounded edge section 5b. The edge forming device 5 is movably arranged relative to the base structure 3a of the first mold part 3, as shown in FIG. Figure 2a , and the edge forming device 5 is adapted to interact with a pressure member 6 arranged in the base structure 3a. The base structure 3a comprises an inner forming mold section 3b, and the edge forming device 5 extends around the inner forming mold section 3b. The inner forming mold section 3b is arranged to form the cellulose product 1 by interacting with a cooperating mold section of the second mold part 4. During the forming of the cellulose product 1, the cellulose blank structure 2 is suitably subjected to a product forming pressure P of at least 1 MPa, preferably in the range of 4-20 MPa. PF and product molding temperature T in the range of 100℃ to 300℃ PFWhen forming the cellulose product 1, strong hydrogen bonds are formed between the cellulose fibers in the cellulose blank structure 2 arranged between the inner forming mold section 3b and the second mold part 4. The temperature and pressure levels are measured in the cellulose blank structure 2 during the forming process, for example, using suitable sensors arranged in or connected to the cellulose fibers in the cellulose blank structure 2.

[0047] like Figure 1 As shown in FIG, the movably arranged edge forming device 5 has a ring-shaped configuration in the embodiment shown. However, it should be understood that the edge forming device 5 can have any suitable shape and configuration, depending on the shape and configuration of the cellulosic product 1. The edge forming device 5 can, for example, be arranged in a pressing direction D relative to the base structure 3a. P The edge forming device 5 and the base structure 3a are arranged slidingly on each other, and the base structure 3a is provided with a recess 3c for accommodating the edge forming device 5. The recess 3c suitably has a shape corresponding to the shape of the edge forming device 5. The edge forming device 5 and the base structure 3a can be made of any suitable material (such as steel, aluminum, other metals or metallic materials) or alternatively made of composite materials or a combination of different materials.

[0048] The pressure member 6 may comprise one or more springs 6a arranged between the base structure 3a and the edge forming device 5. Figure 1 and Figure 2a In the embodiment shown in -d, the pressure member 6 comprises a plurality of spaced springs 6a which are arranged between the base structure 3a and the edge forming device 5. As shown, the plurality of spaced springs 6a are arranged in the recess 3c. Each spring 6a can be arranged as a single spring or as two or more cooperating springs forming a spring unit. One or more springs are suitably compression springs. Figure 1 and Figure 2a In the embodiment shown in FIG. 1 , each spring 6a is arranged as a stack of cooperating disc springs, and the plurality of springs 6a is configured to establish an edge forming pressure P on the cellulose blank structure 2 during forming of the cellulose product 1 . EF Other springs that can be used instead of disc springs are, for example, coil springs or other types of washer springs.

[0049] In order to Figure 1 and Figure 2a-d In the forming die system S of the embodiment shown in FIG. 1 , a cellulose product 1 is formed from an air-formed cellulose blank structure 2, which is first provided by a suitable source. The cellulose blank structure 2 can be air-formed from cellulose fibers and arranged on a roller or in a stacked arrangement. Thereafter, the roller or stack can be arranged to be connected to the forming die system S. Alternatively, the cellulose blank structure can be air-formed from cellulose fibers connected to the forming die system S and directly fed to the die portion. Figure 2a As shown in FIG, the cellulose blank structure 2 is arranged between a first mold part 3 and a second mold part 4. Thereafter, the second mold part 4 is pressed in a pressing direction D P Move in the direction towards the first mould part 3 to the product forming position, such as Figure 2c When the second mold part 4 is pressed against the first mold part 3 and the cellulose blank structure 2 is arranged between the mold parts, during the molding of the cellulose product 1, a molding cavity 9 for forming the cellulose product 1 is formed between the first mold part 3 and the second mold part 4. The product molding pressure P PF and product molding temperature T PF is applied to the cellulose blank structure 2 in the forming cavity 9 .

[0050] The deformation element 10 for establishing the product forming pressure can be arranged in connection with the first mold part 3 and / or the second mold part 4. Figure 1 and Figure 2a In the embodiment shown in -d, the deformation element 10 is attached to the first mold part 3. By using the deformation element 10, the product molding pressure P PF It can be a balanced molding pressure.

[0051] For all embodiments, the first mold part 3 and / or the second mold part 4 may comprise a deformation element 10, and the deformation element 10 is configured to exert a product forming pressure P on the cellulose blank structure 2 in the forming cavity 9 during forming of the cellulose product 1. PF The deforming element 10 can be attached to the first mold part 3 and / or the second mold part 4 using suitable attachment means, such as glue or mechanical fastening members. During the forming of the cellulose product 1, the deforming element 10 deforms to exert a product forming pressure P on the cellulose blank structure 2 in the forming cavity 9. PF , and by the deformation of the deformation element 10, a uniform pressure distribution can be achieved even if the cellulose product 1 has a complex three-dimensional shape or if the cellulose blank structure 2 has a varying thickness. In order to exert the required product forming pressure P on the cellulose blank structure 2 PFThe deformation element 10 is made of a material that can be deformed when a force or pressure is applied, and the deformation element 10 is suitably made of an elastic material that can recover its size and shape after deformation. The deformation element 10 can further be made of a material with suitable properties that can withstand the higher product forming pressure P used when forming the cellulosic product 1. PF and product molding temperature T PF level. Certain elastic or deformable materials exhibit fluid-like properties when exposed to high pressure levels. If the deforming element 10 is made of such a material, a uniform pressure distribution can be achieved during the forming process, wherein the pressure exerted by the deforming element 10 on the cellulose blank structure 2 is equal or substantially equal in all directions between the mold parts. When the deforming element 10 is in its fluid-like state during the pressure, a uniform fluid-like pressure distribution can be achieved. Therefore, using such a material, the product forming pressure P PF The deformation element 10 is applied to the cellulose blank structure 2 from all directions, and in this manner, exerts a uniform forming pressure on the cellulose blank structure 2 during the forming of the cellulose product 1. The deformation element 10 can be made of a suitable structure of one or more elastic materials, and by way of example, the deformation element 10 can be made of a block or substantially block structure of silicone rubber, polyurethane, neoprene, or a rubber with a hardness in the range of 20-90 Shore A. Other materials for the deformation element 10 include, for example, suitable gel materials, liquid crystal elastomers, and MR fluids.

[0052] like Figure 2b As shown in FIG, when the first mold part 3 and the second mold part 4 are arranged in connection with each other, the cellulose blank structure 2 is compressed between the first mold part 3 and the second mold part 4. At the same time, the shaping of the compacted edge structure 1a of the cellulose product 1 is established by the edge shaping device 5. During the movement of the second mold part 4 toward the first mold part 3, the protruding elements 5a of the edge shaping device 5 separate some fibers 2a of the cellulose blank structure 2 by the force exerted by the protruding elements 5a on the cellulose blank structure 2. The separation of the fibers is Figure 3a -b is shown in more detail. When the second mold part 4 reaches the first mold part 3, as shown in Figure 2b As shown in FIG, a stop member 7 arranged on the first mold part 3 prevents direct contact between the protruding element 5a and the second mold part 4 during the forming of the compacted edge structure 1a, as shown in FIG. Figure 3c -d. Figure 1 and Figure 2a In the embodiment shown in -d, the stop member 7 is arranged as a protrusion on the edge forming device 5, which stops in the pressing direction D. P The extension on is greater than the extension of the protruding element 5a. Figure 2bAs shown in FIG, when the second mold part 4 reaches the first mold part 3, the stop member 7 comes into contact with the second mold part 4 and by pressing in the direction D P The greater extension on the edge forming means prevents direct contact between the protruding element 5a and the second mould part 4. The stop member 7 may be arranged as a continuous element extending around the edge forming means 5, such as Figure 1 , or the stop element is alternatively arranged as one or more protrusions extending from the edge forming device 5. The stop member 7 may alternatively be arranged on the second mould part 4 or on the first mould part 3 and the second mould part 4.

[0053] Thus, the stop member 7 prevents contact between the protruding element 5a and the second mould part 4 during the moulding of the compacted edge structure 1a, and with this arrangement the protruding element 5a is arranged at a small distance from the second mould part 4, e.g. Figure 3c -d. Figure 3d and Figure 6 As shown in FIG, a small gap G is formed between the protruding element 5a and the second mold part 4. Therefore, in the operating state of the molding die system S, a gap G is formed between the protruding element 5a and the second mold part 4, wherein the stop member 7 prevents the protruding element 5a and the second mold part 4 from being further displaced toward each other. During the further movement of the second mold part 4 toward the first mold part 3, the edge molding device 5 is pushed into the recess 3c to reach Figure 2c The product forming position shown in FIG. 1 is a position where the product forming pressure P is set in the forming cavity 9. PF When the edge forming device 5 is pushed into the recess 3c, the edge structure 1a of the cellulose product 1 is formed. When the edge structure 1a is formed, the fibers 2a of the cellulose blank structure 2 are gathered in the area between the protruding element 5a and the second mold part 4, as shown in FIG. Figure 3d -e and Figure 6 At the same time, as Figure 3d -e and Figure 6 As shown in the figure, the edge forming temperature T EF is applied to the cellulose blank structure 2 and the edge forming pressure P is applied by means of the pressure member 6 between the protruding element 5a and the second mold part 4 EF applied to the cellulose blank structure 2. When the edge forming temperature T EF and edge forming pressure P EF When applied to the cellulose blank structure 2, a highly compacted edge structure 1a is formed.

[0054] The pressure member 6 is arranged to establish an edge forming pressure P during forming of the edge structure 1a. EF .like Figure 2bAs shown in FIG, when the second mold part 4 comes into contact with the stop member 7, the edge forming device 5 is pushed into the recess 3c of the base structure 3a of the first mold part 3 in the pressing direction as the second mold part 4 moves further toward the first mold part 3. When the edge forming device 5 is pushed into the base structure 3b, the spring 6a is compressed, and by this compression, the edge forming pressure P is increased. EF is applied to the cellulose blank structure 2 between the protruding element 5a and the second mold part 4. Thus, the molding die system S is configured to establish an edge molding pressure P when the edge molding device 5 is moved relative to the base structure 3a by interaction from the pressure member 6. EF A suitable control unit may be used to determine the movement of the first mould part 3 relative to the second mould part 4 in order to control the product moulding pressure P PF , and the characteristics of spring 6a determine the edge forming pressure P EF .

[0055] As mentioned above, the edge forming pressure P EF The appropriate edge forming pressure level P is established by the pressure member 6 and applied to the cellulose blank structure 2 EFL The spring 6a of the pressure member 6 is designed and configured to increase the edge forming pressure level P to at least 10 MPa, preferably in the range of 10-4000 MPa, or more preferably in the range of 100-4000 MPa. EFL Applied to the cellulose blank structure 2. The edge forming test showed that the edge forming pressure level P applied to the cellulose blank structure 2 was EFL Appropriately above 10 MPa to achieve the desired results. Tests further revealed that edge forming pressure levels P above 100 MPa EFL Resulting in a faster edge forming operation of high quality on the edge structure 1a of the cellulose product 1. At edge forming pressure levels P up to 4000 MPa EFL The tests were carried out at pressures of 100°C, resulting in a high quality edge forming operation on the edge structure 1a. However, it will be appreciated that even higher pressure levels may be used.

[0056] The forming mold system S further comprises a heating unit 8, which reduces the edge forming temperature T EF is applied to the cellulose blank structure 2. The heating unit 8 is configured to set the edge forming temperature level T in the range of 50-300°C, preferably in the range of 100-300°C, when forming the edge structure 1a. EFLApplied to the cellulose blank structure 2. The edge forming test shows that within the above pressure range, the edge forming temperature level T applied to the cellulose blank structure 2 is EFL Well above 50°C. The test further revealed that at the edge forming temperature level T EFL Above 100°C, this results in a faster edge forming operation with high quality on the edge structure 1a of the cellulose product 1. At edge forming temperature levels T up to 300°C EFL The test is performed under the condition of , resulting in a high-quality edge forming operation on the edge structure 1a. The heating unit 8 is suitably configured to increase the edge forming temperature T via the protruding element 5a and / or the second mold part 4 to . EF is applied to the cellulose blank structure 2. The heating unit 8 may have any suitable configuration. A suitable heating unit, such as one or more heated forming die sections, may be used to establish the edge forming temperature T EF The heating unit 8 may be integrated or cast into the first mould part 3 and / or the second mould part 4, and suitable heating means are for example electric heaters (such as resistor elements) or fluid heaters. Other suitable heat sources may also be used.

[0057] The edge forming temperature and the pressure level are measured in the cellulose blank structure 2 during the forming process, for example, by means of suitable sensors which are arranged in the cellulose fibers in the cellulose blank structure 2 or are connected to the cellulose fibers in the cellulose blank structure.

[0058] The heating unit 8 can also be used to establish the product molding temperature T in the molding cavity 9. PF .exist Figure 1 and Figure 2a In the embodiment shown in Figure d, the heating device 8 is suitably integrated into the edge forming device 5 .

[0059] like Figure 3a -e and Figure 6 As shown in more detail in FIG, as described above, the protruding element 5a comprises an edge section 5b facing the second mold part 4. The edge section 5b together with the second mold part 4 is configured to form a high pressure zone Z in the cellulose blank structure 2 between the protruding element 5a and the second mold part 4 during the forming of the compacted edge structure 1a. HP In the high pressure area Z HP As mentioned above, the edge forming pressure level P is at least 10 MPa, preferably in the range of 10-4000 MPa, or more preferably in the range of 100-4000 MPa. EFL is applied to the cellulose blank structure 2. The edge forming pressure level P EFLWith the edge forming temperature level T in the range of 50-300℃, preferably in the range of 100-300℃ EFL Together, the cellulose fibers 2a in the cellulose blank structure 2 are highly impacted. The cellulose fibers are firmly bonded to each other through hydrogen bonds to form a highly compacted edge structure 1a of the cellulose product 1. The edge structure 1a is suitable for being formed into a thin edge section extending around the periphery of the cellulose product 1, and the formed highly compacted edge structure 1a effectively prevents delamination and moisture absorption of the cellulose product 1. At a high edge forming pressure P EF is applied to the cellulose blank structure 2 and there is a small distance between the edge section 5b and the second mold part 4, the high pressure zone Z HP The cellulose fibers 2a in the mold form a very thin compacted cellulose structure that can be used to easily separate the formed cellulose product 1 from the residual fibers 2b outside the mold part. High pressure zone Z HP The thin, highly compacted cellulose structure in the edge forming process is exposed to high compressive stresses and during the edge forming process, when the edge forming pressure P is utilized, the EF When a high pressure level is applied to the cellulose fibers 2a, the high pressure zone Z is HP The cellulose fibers 2a in the cellulose product 1 are broken. The remaining residual fibers 2b can be reused after forming the cellulose product 1.

[0060] In all embodiments, the second mould part 4 may be arranged with a high pressure surface 4a facing the edge section 5b, e.g. Figure 6 The high-pressure surface 4a is suitably integrated in the second mold part 4 and is made of a material capable of withstanding high pressure levels, such as copper, brass or a lead alloy. The high-pressure surface 4a together with the protruding element 5a is configured to form a high-pressure zone Z during the forming of the compacted edge structure 1a. HP The high pressure surface 4a suitably has a shape corresponding to the shape of the edge section 5b. The high pressure surface 4a is suitably flat and / or flush with the adjacent surrounding surface of the second mould part 4.

[0061] As mentioned above, the appropriate edge forming pressure level P EFL is at least 10 MPa, preferably in the range of 10-4000 MPa, or more preferably in the range of 100-4000 MPa, and the edge forming pressure P EF The pressure is established by the interaction from the pressure member 6. One or more springs 6a establish an edge forming pressure P on the cellulose blank structure 2 between the protruding element 5a and the second mould part 4. EF . Edge forming pressure P EFis established by the movement of the edge forming means 5 relative to the base structure 3a by interaction from the pressure member 6. Once the cellulosic product has been formed in the multi-cavity forming mould system S, the second mould part 4 is moved in a direction away from the second mould part 4, as Figure 2d and the cellulosic product 1 can be removed, for example, by using a ram or similar device.

[0062] exist Figure 4 In the alternative embodiment shown, the pressure member 6 instead comprises a hydraulic pressure unit 6b. The hydraulic pressure unit 6b comprises a pressure chamber 6c which is delimited by the recess 3c of the base structure 3a and the edge forming device 5. The edge forming device 5 is provided with a protruding element 5a comprising an edge section 5b and suitably has a configuration as described above in conjunction with Figure 2a -d The functions and designs described in the embodiments. Figure 4 In the embodiment shown, the pressure chamber 6c has an annular configuration corresponding to the shape of the edge profiling device 5. In this way, the edge profiling device 5 is configured as a hydraulic piston or a double-acting hydraulic piston in the pressure chamber 6c. By filling the pressure chamber 6c with a suitable pressure medium (for example hydraulic oil), the edge profiling pressure P EF It may be applied to the cellulose blank structure 2 via an edge forming device 5. It will be appreciated that the pressure chamber 6c and the edge forming device 5 may have any suitable respective shapes, depending on the edge shape of the cellulose product 1 .

[0063] The pressure chamber 6c is connected to a hydraulic pump system, a hydraulic cylinder, a spring-loaded hydraulic cylinder or other similar systems or devices which generate pressure via channels arranged in the base structure 3a which is applied to the edge forming device 5 using a pressure medium. Figure 4 In the embodiment shown, a hydraulic pump 11a can be connected to a pressure chamber 6c for building up hydraulic pressure in the system. The pressure medium applies pressure to the lower surface 5c of the edge forming device 5, and the lower surface 5c is arranged to be connected to the pressure chamber 6c. The edge forming device 5 may include a sealing element 5d, which forms a tight seal between the pressure chamber 6c and the edge forming device 5. The hydraulic pump 11a is driven, for example, by an electric motor, and is connected to the pressure chamber 6c via a pressure valve 11c for opening and closing the hydraulic pressure. The pressure control valve 11d can be used to regulate the pressure level. The pressure medium can be stored in a tank 11e and expanded into the storage tank 11b. The pressure medium flowing out of the pressure chamber 6c and the pressure control valve 11d can be returned to the tank 11e, as shown. Figure 4 The components of the hydraulic pump system are connected to the appropriate conduits.

[0064] Furthermore, other embodiments of the pressure member 6 may include a pneumatic cylinder or a gas spring instead of a hydraulic pressure unit.

[0065] In order to Figure 4 In the forming mold system S of the illustrated embodiment, a cellulose product 1 is formed from an air-formed cellulose blank structure 2, which is first provided from a suitable source. The cellulose blank structure 2 can be air-formed from cellulose fibers and arranged on a roller or in a stacked arrangement. Thereafter, the roller or stack can be arranged to be connected to the multi-cavity forming mold system S. Alternatively, the cellulose blank structure can be air-formed from cellulose fibers connected to the multi-cavity forming mold system S and directly fed to the mold part. Figure 4 As shown in FIG, the cellulose blank structure 2 is arranged between a first mold part 3 and a second mold part 4.

[0066] Thereafter, the first mould part 3 and the second mould part 4 are moved in a direction towards each other and Figure 4 In the embodiment shown, the second mold part 4 is combined with Figure 2a -d) is moved towards the first mould part 3 in a similar manner as described above. During the movement of the second mould part 4 towards the first mould part 3, the protruding elements 5a of the edge forming device 5 separate some of the fibres 2a of the cellulose blank structure 2 by the force exerted by the protruding elements 5a on the cellulose blank structure 2, such as Figure 3a When the second mold part 4 reaches the first mold part 3, the stop member 7 arranged on the first mold part 3 prevents direct contact between the protruding element 5a and the second mold part 4 during the forming of the compacted edge structure 1a. The stop member 7 is combined with the above Figure 2a -d is suitably arranged as a protrusion on the edge forming device 5, the stop member in the pressing direction D P When the second mold part 4 reaches the first mold part 3, the stop member 7 comes into contact with the second mold part 4 and by pressing in the direction D P The stop member 7 may be arranged as a continuous element extending around the edge forming device 5 or alternatively as one or more protrusions extending from the edge forming device 5. The stop member 7 may alternatively be arranged on the second mould part 4 or on the first mould part 3 and the second mould part 4.

[0067] like Figure 4 As shown in FIG, when the edge forming device 5 and the second mold part 4 are connected to each other, a hydraulic pressure is established in the pressure chamber 6c by the pressure medium for adjusting the edge forming pressure P by the edge forming device 5. EFis applied to the cellulose blank structure 2. By means of the hydraulic pressure built up, the edge forming device 5 is moved in the direction towards the second mould part 4 by the hydraulic pressure built up. As described above, a suitable edge forming pressure level P applied to the cellulose blank structure 2 EFL At least 10M P a, preferably in the range of 10-4000 MPa, or more preferably in the range of 100-4000 MPa. When the pressure medium flows into the pressure chamber 6c, the edge forming device 5 is pushed in the direction toward the second mold part 4 to increase the edge forming pressure P EF is applied to the cellulose blank structure 2 arranged between the protruding element 5a and the second mould part 4. Thus, the edge forming pressure P EF The edge forming device 5 is established by the movement of the edge forming device 5 relative to the base structure 3a by the interaction from the pressure member 6. A suitable control unit can be used to control the hydraulic pressure applied by the pressure medium to the edge forming device 5. During the forming of the edge structure 1a of the cellulose product 1, the cellulose blank structure 2 is heated to an edge forming temperature level T in the range of 50-300°C, preferably in the range of 100-300°C. EFL The edge forming operation may be performed simultaneously with the product forming operation or alternatively before or after the product forming operation.

[0068] Once the edge structure 1a and the cellulose product 1 are formed in the forming die system S, the second die part 4 is moved in a direction away from the first die part 3. A spring, a cylinder (e.g. a double-acting cylinder) or similar device can be used in conjunction with the edge forming device 5 to return the edge forming device 5 to the initial position after the hydraulic pressure is released.

[0069] Figure 4 The molding die system S in the embodiment shown may further include a heating unit 8, which is combined with the above Figure 2a -d, wherein the edge forming temperature level T is set to within the range of 50-300°C, preferably within the range of 100-300°C by means of the heating unit 8. EFL Applied to the cellulose blank structure 2. Edge forming temperature T EF The edge forming pressure P is applied to the cellulose blank structure 2 by means of the protruding elements 5a and / or the second mould part 4. When the edge forming device 5 is moved relative to the base structure 3a by interaction from the pressure member 6, the edge forming pressure P EF As described above, the pressure member 6 comprises a hydraulic pressure unit 6b and this hydraulic pressure unit 6b establishes an edge forming pressure P on the cellulose blank structure 2 between the protruding element 5a and the second mold part 4. EF .

[0070] In an alternative embodiment, not shown, the forming die system S can be arranged without the stop member 7. The protruding element 5a can be configured to have the same function as described in the different embodiments above. The fibers 2a of the cellulose blank structure 2 are separated between the protruding element 5a and the second die part 4 and the edge forming pressure P is applied by means of the pressure member 6. EF is applied to the cellulose blank structure 2 between the protruding element 5a and the second mold part 4 to compact the cellulose blank structure 2 in the same manner as described above to form a compacted edge structure 1a. During the edge forming process, the edge forming temperature T EF is applied to the cellulose blank structure 2 .

[0071] The edge forming device 5 is further suitable for use in a multi-cavity forming mold system S, in which two or more forming molds are integrated into one mold unit. Figure 5 , a first mold part 3 of a multi-cavity molding mold system S having four molding molds is schematically shown. Figure 5 As shown in FIG, the first mould part comprises four edge forming means 5 having protruding elements 5a arranged in a common base structure 3a of the first mould part 3 and the edge forming means 5 may have the same construction and function as described in the above embodiments. Figure 5 The multi-cavity forming mold system S shown can form four cellulose products in a single pressing step to achieve efficient production of cellulose products.

[0072] exist Figure 7a In another alternative embodiment shown in Figure 1-c, the pressure member 6 instead comprises one or more detent mechanisms 12 arranged in the recess 3c of the base structure 3a. The one or more detent mechanisms 12 are arranged to cooperate with the edge forming device 5. The edge forming device 5 is provided with a protruding element 5a comprising an edge section 5b and suitably has a protruding element 5a as described above in combination with the edge forming device 5. Figure 2a -d functions and designs as described in the embodiments.

[0073] exist Figure 7a In the embodiment shown in Figure 1-c, the pressure member 6 is provided with one or more spring ball type latching mechanisms 12, wherein each of the one or more latching mechanisms 12 comprises a spring 12a and a latching ball 12b, which is arranged in a channel 12c or a similar structure connected to the outer side wall 3d of the recess 3c. The latching ball 12b is configured to interact with the outer side edge 5f of the edge forming device 5. The outer side edge 5f has an inclined configuration in the embodiment shown, but the outer side edge can also have any suitable shape. Figure 7aAs shown in FIG. 1-c, the pressure member 6 appropriately includes a plurality of latching mechanisms 12 arranged around the recess 3c.

[0074] use Figure 7a In this arrangement of the pressure member shown in -c, the edge forming device 5 is held in the pressing direction D by the pressure member 6 P The mold is then held in place until the second mold part 4 exerts a predetermined release force F RE Apply to the edge forming device 5, such as Figure 7a -b, where the applied force F A Less than the predetermined release force F RE When the applied force F A Less than the predetermined release force F RE The spring-loaded locking ball 12b prevents the edge forming device 5 from moving into the recess 3c. RE is determined by the configuration of the spring 12a and the configuration of the outer edge 5f. The spring 12a and the outer edge 5f can be varied for different forming applications and are determined to match a specific desired edge forming pressure level P EFL The spring 12a may be of any suitable type, such as a compression spring. As mentioned above, a suitable edge forming pressure level P EFL is at least 10 MPa, preferably in the range of 10-4000 MPa, or more preferably in the range of 100-4000 MPa, and the edge forming pressure P EF It is established by the interaction from the pressure member 6.

[0075] Figure 7a -c The molding die system S in the embodiment shown in FIG. 1 may further include a heating unit, which is combined with the above Figure 2a -d, wherein the edge forming temperature level T is set to within the range of 50-300°C, preferably within the range of 100-300°C by means of a heating unit. EFL Applied to the cellulose blank structure 2.

[0076] During the edge forming operation, the first mould part 3 and the second mould part 4 are moved in a direction towards each other and Figure 7a In the embodiment shown in -c, the second mold part 4 is combined with Figure 2a -d) is moved towards the first mould part 3 in a similar manner as described above. During the movement of the second mould part 4 towards the first mould part 3, the protruding elements 5a of the edge forming device 5 separate some of the fibres 2a of the cellulose blank structure 2 by the force exerted by the protruding elements 5a on the cellulose blank structure 2, such as Figure 3a -b. The second mold part 4 is Figure 7aThe starting position shown is moved towards the first mold part 3, and when the second mold part 4 reaches the first mold part 3, as shown Figure 7b As shown in FIG, a stop member 7 arranged on the first mold part 3 prevents direct contact between the protruding element 5a and the second mold part 4 during the forming of the compacted edge structure 1a. The stop member 7 is arranged in combination with the above Figure 2a -d is suitably arranged as a protrusion on the edge forming device 5, the stop member in the pressing direction D P When the second mould part 4 reaches the first mould part 3, the stop member 7 interacts with the second mould part 4 and by pressing in the direction D P The greater extension on the edge forming device 5 prevents contact between the protruding element 5a and the second mold part 4. The stop member 7 can be arranged as a continuous element extending around the edge forming device 5 or alternatively as one or more protrusions extending from the edge forming device 5. The stop member 7 can alternatively be arranged on the second mold part 4 or on the first mold part 3 and the second mold part 4. Figure 7b As shown in FIG, with this arrangement, the edge forming operation is carried out with the edge forming device 5 held in place by the retaining mechanism.

[0077] As the second mould part 4 moves further towards the first mould part 3, the force F exerted on the edge forming means 5 A increases to a certain level at which the applied force F A Equal to or exceeding the predetermined release force F RE .like Figure 7c As shown in the figure, when the applied force F A Equal to or greater than the predetermined release force F RE When the edge forming device 5 is released by one or more latching mechanisms 12 and is pressed by the second mold part 4 along the pressing direction D P Pushed into the recess 3c. When released, the detent ball 12a is pushed into its corresponding channel 12c when the corresponding spring 12b is compressed, thereby allowing the edge forming device 5 to be pushed into the recess 3c. By releasing the edge forming device 5, the available system force can be used in the product forming operation. The forming mold system S in this embodiment can be further provided with one or more return springs 13 for Figure 7c After the product forming operation shown, the edge forming device 5 is pushed back to Figure 7a Position shown.

[0078] In an alternative, not shown, embodiment, the one or more detent mechanisms 12 may be alternatively arranged in connection with an inner sidewall of the recess 3 c, which is configured to interact with an inner edge of the edge forming device 5. In another alternative, not shown, embodiment, the one or more detent mechanisms may be alternatively arranged in connection with both an inner and outer sidewall of the recess 3 c, which are configured to interact with an inner and outer edge of the edge forming device 5.

[0079] Therefore, using Figure 7a -c shows the system configuration, when reaching or exceeding the predetermined release force F RE The pressure member 6 with the locking mechanism 12 has the function of a release system. The release function allows the edge forming operation to occur before the product forming operation, and releases the edge forming pressure P when the edge structure 1a is formed. EF , more of the available total molding die system pressure can be used in subsequent product molding operation steps.

[0080] The detent mechanism 12 may alternatively be a plunger detent type. Instead of a detent mechanism, a hydraulic mechanism, a pneumatic mechanism or a magnetic mechanism may be used to hold the edge forming device in place until a predetermined release force F is reached or exceeded. RE Alternatively, as Figure 8a As shown in FIG. 1-b, the pressure member 6 may be configured with a leaf spring 6a which is arranged between the edge forming device 5 and the recess 3c along the pressing direction D. P Extension. Figure 8a As shown in RE With this configuration, the predetermined release force F RE is the force corresponding to the lowest applied force F A The critical load that will cause the lateral deflection or buckling of the leaf spring 6a. RE The leaf spring 6a will deflect laterally and reduce the total system force. Therefore, when the predetermined release force F is reached or exceeded, RE When the leaf spring 6a is allowed to Figure 8a The initial position shown is bent to Figure 8b Release position shown. Figure 8a In the equation, the applied force F A Less than the predetermined release force F RE , and in Figure 8b The released position is shown in . By releasing the edge forming device 5 , the available system force can be used in the product forming operation.

[0081] "Up" and "down" in this context and throughout this disclosure refer to the orientation as shown in the figures. It should be understood that components, parts or details can be oriented in other ways if desired.

[0082] As described above, the forming mold system S may further include a suitable control unit for controlling the forming of the cellulose product 1. The control unit may include suitable software and hardware for controlling the multi-cavity forming mold system S and the various processes and method steps performed by the multi-cavity forming mold system S. The control unit may, for example, control temperature, pressure, forming time, and other process parameters. The control unit may further be connected to related process equipment, such as a pressing unit, a heating unit, a cellulose blank structure transport unit, and a cellulose product transport unit.

[0083] The present disclosure has been described above with reference to specific embodiments. However, other embodiments in addition to the above-described embodiments are also possible and within the scope of the present disclosure. Within the scope of the present disclosure, method steps different from the above-described method steps may be provided, and the method steps may be performed by hardware or software. Therefore, according to an exemplary embodiment, a non-transitory computer-readable storage medium is provided, which stores one or more programs configured to be executed by one or more processors of a molding die system, the one or more programs including instructions for performing a method according to any of the above-described embodiments. Alternatively, according to another exemplary embodiment, a cloud computing system may be configured to perform any method aspect presented herein. The cloud computing system may include distributed cloud computing resources that jointly perform the method aspects presented herein under the control of one or more computer program products. In addition, the processor may be connected to one or more communication interfaces and / or sensor interfaces for receiving and / or transmitting data with an external entity (such as a sensor, an off-site server, or a cloud-based server).

[0084] The one or more processors associated with the molding die system S may be any number of hardware components or may include any number of hardware components for conducting data or signal processing or for executing computer code stored in memory. The system may have an associated memory, and the memory may be one or more devices for storing data and / or computer code that are used to complete or contribute to the various methods described in this specification. The memory may include volatile memory or non-volatile memory. The memory may include a database component, an object code component, a script component, or any other type of information structure for supporting the various activities of this specification. According to an exemplary embodiment, any distributed memory device or local memory device may be used in conjunction with the system and method of this specification. According to an exemplary embodiment, the memory is communicatively connected to the processor (e.g., via a circuit or any other wired connection, wireless connection, or network connection) and includes computer code for executing one or more processes described herein.

[0085] It should be understood that the foregoing description is merely exemplary in nature and is not intended to limit the present disclosure, its application or use. Although specific examples have been described in the specification and shown in the drawings, it should be understood by those skilled in the art that various changes may be made and equivalents may be substituted for elements thereof without departing from the scope of the present disclosure as defined in the claims. In addition, modifications may be made to adapt particular circumstances or materials to the teachings of the present disclosure without departing from the basic scope of the present disclosure. Therefore, it is not intended that the present disclosure be limited to the specific examples shown in the drawings and described in the specification as the best modes presently contemplated for carrying out the teachings of the present disclosure, but the scope of the present disclosure will include any embodiment that falls within the foregoing description and the appended claims. The reference numerals in the claims should not be construed as limiting the scope of what is protected by the claims, and their sole function is to make the claims easier to understand. BRIEF DESCRIPTION OF THE DRAWINGS

[0087] 1: Cellulose products

[0088] 1a: Marginal structure

[0089] 2: Cellulose blank structure

[0090] 2a: Fiber

[0091] 2b: Residual fibers

[0092] 3: The first mold part

[0093] 3a: Base structure

[0094] 3b: Inner mold section

[0095] 3c: concave part

[0096] 3d: sidewall

[0097] 4: Second mold part

[0098] 4a: High-pressure surface

[0099] 5: Edge forming device

[0100] 5a: Protruding elements

[0101] 5b: Edge segment

[0102] 5c: lower surface

[0103] 5d: Sealing element

[0104] 5e: Upper surface

[0105] 5f: Side edge

[0106] 6: Pressure components

[0107] 6a: Spring

[0108] 6b: Hydraulic pressure unit

[0109] 6c: Pressure chamber

[0110] 7: Stop member

[0111] 8: Heating unit

[0112] 9: Molding cavity

[0113] 10: Deformation element

[0114] 11a: Hydraulic pump

[0115] 11b: Storage tank

[0116] 11c: Molding pressure valve

[0117] 11d: Pressure control valve

[0118] 11e: Can

[0119] 12: Positioning mechanism

[0120] 12a: Spring

[0121] 12b: Positioning Ball

[0122] 12c: Channel

[0123] 13: Return spring

[0124] D P :Suppression direction

[0125] F A : applied force

[0126] F RE : Predetermined release force

[0127] G: Gap

[0128] P EF : Edge forming pressure

[0129] P EF : Edge forming pressure level

[0130] P PF : Product molding pressure

[0131] S: Molding mold system

[0132] T EF : Edge forming temperature

[0133] T EFL : Edge forming temperature level

[0134] T PF : Product molding temperature

[0135] Z HP : High pressure area

Claims

1. A method for edge shaping of a cellulose product (1) in a shaping die system (S), wherein: The forming die system (S) is suitable for forming the cellulose product (1) from an air-formed cellulose blank structure (2), wherein the forming die system (S) comprises a first die part (3) and a second die part (4), the first die part and the second die part being arranged to cooperate with each other, wherein the first die part (3) comprises an edge forming device (5) having protruding elements (5a), the protruding elements being configured to compact and separate the fibers (2a) of the cellulose blank structure (2), wherein the edge forming device (5) is movably arranged relative to a base structure (3a) of the first die part (3), wherein the edge forming device (5) is adapted to interact with a pressure member (6) arranged in the base structure (3a), and wherein the method comprises the following steps: Providing an air-formed cellulose blank structure (2) and arranging the cellulose blank structure (2) between the first mold part (3) and the second mold part (4); By separating the fibers (2a) of the cellulose blank structure (2) using the protruding elements (5a), lowering the edge forming temperature (T EF ) is applied to the cellulose blank structure (2) and the edge forming pressure (P EF ) is applied to the cellulose blank structure (2) between the protruding element (5a) and the second mold part (4) to compact the cellulose blank structure (2), thereby forming a compacted edge structure (1a) of the cellulose product (1).

2. The edge forming method according to claim 1, in, The molding die system (S) comprises a heating unit (8), wherein the method further comprises the following steps: using the heating unit (8) to adjust the edge molding temperature level (T EFL ) is applied to the cellulose blank structure (2), and The pressure member (6) is used to form an edge pressure level (P EFL ) is applied to the cellulose blank structure (2).

3. The edge forming method according to claim 1 or 2, in, The method further comprises the step of: using the protruding element (5a) and / or the second mold part (4) to adjust the edge forming temperature (T EF ) is applied to the cellulose blank structure (2).

4. The edge forming method according to claim 1 or 2, in, The forming mold system (S) comprises a stop member (7) arranged on the first mold part (3) and / or the second mold part (4), wherein the method further comprises the step of preventing contact between the protruding element (5a) and the second mold part (4) by means of the stop member (7) during the forming of the compacted edge structure (1a).

5. The edge forming method according to claim 1 or 2, in, The method further comprises the steps of establishing the edge forming pressure (P) on the cellulose blank structure (2) when the edge forming device (5) is moved relative to the base structure (3a) by interaction from the pressure member (6) EF ).

6. The edge forming method according to claim 1 or 2, in, The pressure member (6) comprises one or more springs (6a) arranged between the base structure (3a) and the edge forming device (5), wherein the one or more springs (6a) establish the edge forming pressure (P) on the cellulose blank structure (2) between the protruding element (5a) and the second mold part (4). EF ).

7. The edge forming method according to claim 1 or 2, in, The pressure member (6) comprises a hydraulic pressure unit (6b), wherein the hydraulic pressure unit (6b) comprises a pressure chamber (6c) arranged between the base structure (3a) and the edge forming device (5), wherein the hydraulic pressure unit (6b) generates an edge forming pressure (P) on the cellulose blank structure (2) between the protruding element (5a) and the second mold part (4). EF ).

8. The edge forming method according to claim 1 or 2, in, The pressure member (6) comprises one or more detent mechanisms (12) arranged in the base structure (3a), wherein the one or more detent mechanisms (12) are configured to interact with the edge forming device (5) to establish the edge forming pressure (P) on the cellulose blank structure (2) between the protruding element (5a) and the second mold part (4). EF ), wherein the method further comprises the following steps: applying a force (F A ) is applied to the edge forming device (5); and when the applied force (F A ) is equal to or greater than the predetermined release force (F RE ), the one or more latching mechanisms (12) are released to allow the edge forming device (5) to move relative to the base structure (3a).

9. The edge forming method according to claim 2, wherein: The edge forming temperature level (T EFL ) in the range of 100-300°C.

10. The edge forming method according to claim 2, wherein: The edge forming pressure level (P EFL ) is in the range of 10-4000MPa.

11. A forming die system (S) for forming an edge of a cellulose product (1), wherein: The forming die system (S) is suitable for forming the cellulose product (1) from an air-formed cellulose blank structure (2), wherein the forming die system (S) comprises a first die part (3) and a second die part (4), the first die part and the second die part being arranged to cooperate with each other, CHARACTERIZED IN THAT the first mould part (3) comprises an edge forming device (5) having protruding elements (5a) configured to compact and separate the fibres (2a) of the cellulose blank structure (2), wherein the edge forming device (5) is movably arranged relative to a base structure (3a) of the first mould part (3), wherein the edge forming device (5) is adapted to interact with a pressure member (6) arranged in the base structure (3a), wherein the forming die system (S) is configured to separate the fibers (2a) of the cellulose blank structure (2) by using the protruding elements (5a), to reduce the edge forming temperature (T EF ) is applied to the cellulose blank structure (2) and the edge forming pressure (P EF ) is applied to the cellulose blank structure (2) between the protruding element (5a) and the second mold part (4) to compact the cellulose blank structure (2), thereby forming a compacted edge structure (1a) of the cellulose product (1).

12. The forming mold system (S) according to claim 11, It is characterized by: The molding die system (S) further comprises a heating unit (8), wherein the heating unit (8) is configured to set the edge molding temperature level (T EFL ) is applied to the cellulose blank structure (2), and wherein the pressure member (6) is configured to apply an edge forming pressure level (P EFL ) is applied to the cellulose blank structure (2).

13. The forming mold system (S) according to claim 12, It is characterized by: The heating unit (8) is configured to increase the edge forming temperature (T EF ) is applied to the cellulose blank structure (2).

14. The forming mold system (S) according to any one of claims 11 to 13, It is characterized by: The forming mold system (S) comprises a stop member (7) arranged on the first mold part (3) and / or the second mold part (4), wherein the stop member (7) is configured to prevent contact between the protruding element (5a) and the second mold part (4) during the forming of the compacted edge structure (1a).

15. The forming mold system (S) according to any one of claims 11 to 13, It is characterized by: The protruding element (5a) comprises an edge section (5b) facing the second mould part (4), wherein the edge section (5b) together with the second mould part (4) is configured to form a high pressure zone (Z) in the cellulose blank structure (2) between the protruding element (5a) and the second mould part (4) during the forming of the compacted edge structure (1a). HP ).

16. The forming mold system (S) according to claim 15, It is characterized by: The second mold part (4) comprises a high-pressure surface (4a) facing the edge section (5b), wherein the high-pressure surface (4a) together with the protruding element (5a) is configured to form the high-pressure zone (Z) during the forming of the compacted edge structure (1a) HP ).

17. The forming mold system (S) according to any one of claims 11 to 13, It is characterized by: The forming die system (S) is configured to establish the edge forming pressure (P) when the edge forming device (5) moves relative to the base structure (3a) through interaction from the pressure member (6) EF ).

18. The forming mold system (S) according to any one of claims 11 to 13, It is characterized by: The pressure member (6) comprises one or more springs (6a) arranged between the base structure (3a) and the edge forming device (5).

19. The forming mold system (S) according to any one of claims 11 to 13, It is characterized by: The pressure member (6) comprises a hydraulic pressure unit (6b), wherein the hydraulic pressure unit (6b) comprises a pressure chamber (6c) arranged between the base structure (3a) and the edge forming device (5).

20. The forming mold system (S) according to any one of claims 11 to 13, It is characterized by: The pressure member (6) comprises one or more detent mechanisms (12) arranged in the base structure (3a), wherein the one or more detent mechanisms (12) are configured to interact with the edge forming device (5).

21. The forming mold system (S) according to any one of claims 11 to 13, It is characterized by: The base structure (3a) comprises an inner forming mould section (3b), wherein the edge forming device (5) extends around the inner forming mould section (3b).

22. The molding die system (S) according to claim 12, wherein: The edge forming temperature level (T EFL ) in the range of 100-300°C.

23. The molding die system (S) according to claim 12, wherein: The edge forming pressure level (P EFL ) is in the range of 10-4000MPa.

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