EP4045308A1 - Moule à compression et procédé de fabrication d'un moule à compression - Google Patents

Moule à compression et procédé de fabrication d'un moule à compression

Info

Publication number
EP4045308A1
EP4045308A1 EP20793288.0A EP20793288A EP4045308A1 EP 4045308 A1 EP4045308 A1 EP 4045308A1 EP 20793288 A EP20793288 A EP 20793288A EP 4045308 A1 EP4045308 A1 EP 4045308A1
Authority
EP
European Patent Office
Prior art keywords
pressing surface
metal layers
pressing
mineral particles
press
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
EP20793288.0A
Other languages
German (de)
English (en)
Inventor
Thorsten Hagedorn
Berthold Thölen
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hueck Rheinische GmbH
Original Assignee
Hueck Rheinische GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hueck Rheinische GmbH filed Critical Hueck Rheinische GmbH
Publication of EP4045308A1 publication Critical patent/EP4045308A1/fr
Pending legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
    • C23C2/006—Pattern or selective deposits
    • C23C2/0064—Pattern or selective deposits using masking layers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B3/00—Presses characterised by the use of rotary pressing members, e.g. rollers, rings, discs
    • B30B3/005—Roll constructions
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
    • B30B15/06—Platens or press rams
    • B30B15/062—Press plates
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B5/00—Presses characterised by the use of pressing means other than those mentioned in the preceding groups
    • B30B5/04—Presses characterised by the use of pressing means other than those mentioned in the preceding groups wherein the pressing means is in the form of an endless band
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B44—DECORATIVE ARTS
    • B44B—MACHINES, APPARATUS OR TOOLS FOR ARTISTIC WORK, e.g. FOR SCULPTURING, GUILLOCHING, CARVING, BRANDING, INLAYING
    • B44B5/00—Machines or apparatus for embossing decorations or marks, e.g. embossing coins
    • B44B5/02—Dies; Accessories
    • B44B5/026—Dies
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
    • C23C2/04—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor characterised by the coating material
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
    • C23C2/26—After-treatment
    • C23C2/265—After-treatment by applying solid particles to the molten coating
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
    • C25D15/00—Electrolytic or electrophoretic production of coatings containing embedded materials, e.g. particles, whiskers, wires
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
    • C25D5/00—Electroplating characterised by the process; Pretreatment or after-treatment of workpieces
    • C25D5/02—Electroplating of selected surface areas
    • C25D5/022—Electroplating of selected surface areas using masking means
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
    • C25D5/00—Electroplating characterised by the process; Pretreatment or after-treatment of workpieces
    • C25D5/10—Electroplating with more than one layer of the same or of different metals
    • C25D5/12—Electroplating with more than one layer of the same or of different metals at least one layer being of nickel or chromium
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
    • C25D5/00—Electroplating characterised by the process; Pretreatment or after-treatment of workpieces
    • C25D5/60—Electroplating characterised by the structure or texture of the layers
    • C25D5/605—Surface topography of the layers, e.g. rough, dendritic or nodular layers
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
    • C25D7/00—Electroplating characterised by the article coated

Definitions

  • the invention relates to a pressing tool and a method for producing a pressing tool.
  • the pressing tool comprises a structured pressing surface.
  • Pressing tools e.g. in the form of press plates, endless belts or embossing rollers, are used in the woodworking industry, for example, to produce furniture, laminates or panels, i.e. general workpieces.
  • the workpieces are pressed with the pressing surface of the pressing tool, so that the workpieces have surfaces corresponding to the pressing surface.
  • WO 2015/036070 A1 discloses a pressing tool with a structured pressing surface which is produced by superimposed metal layers. For this purpose, a mask is applied at least once in order to cover partial areas and at least once a metal layer is applied to the uncovered areas in order to build up the structured press surface consisting of elevations and depressions. These two process steps are repeated until a desired structure depth of the structured press surface is reached.
  • the structured pressing surface can then be provided with a hard chrome layer.
  • WO 2008/120058 A1 discloses a pressing tool, the pressing surface of which is formed by a layer consisting of a metal matrix with mineral or ceramic particles embedded therein.
  • the object of the invention is to specify an improved pressing tool with a structured pressing surface.
  • the object of the invention is achieved by a method for the etch-free production of a pressing tool provided for producing a workpiece, which has a pressing surface with a structure of elevations and depressions, comprising the following process steps: a) applying a mask to cover areas, b) applying a metal layer to the areas not covered by the mask with the addition of mineral particles, and c) repeating the steps a) and b), until the pressing surface with the structure of the elevations and depressions has been created by multiple application of masks and metal layers with the addition of mineral particles.
  • the object of the invention is also achieved by a pressing tool which is provided for producing a workpiece, having a pressing surface with a structure of elevations and depressions and several metal layers superimposed in layers in which mineral particles are embedded and which form the pressing surface.
  • the press tool according to the invention is produced in particular using the method according to the invention.
  • the pressing surface can be cleaned in order to remove residues from the masks.
  • the press tool according to the invention is, for example, an endless belt, an embossing roller or preferably a press plate and comprises the press surface. This includes the structure from the elevations and depressions, so it is a structured pressing surface. This gives the workpiece produced with the pressing tool a structured surface corresponding to the structure of the pressing surface.
  • the workpiece is, for example, a material plate.
  • a material plate This includes, for example, a carrier, for example an MDF board or a chipboard, which is pressed with a resin or plastic impregnated substrate, for example paper, by means of the pressing tool.
  • the material plate can also be a so-called luxurious vinyl tile (LVT).
  • the press tool according to the invention comprises the plurality of metal layers superimposed in layers, that is to say in particular a plurality of metal layers lying on top of one another.
  • the metal layers are preferably chromium-free metal layers, e.g., nickel layers. This increases the environmental compatibility of the production.
  • the press tool is produced by repeatedly applying a mask in order to cover areas and then to provide the areas not covered by the mask with a metal layer. This is repeated until the press surface with its structure is created.
  • the result is a structure of the pressing tool structured in layers by the metal layers, which are in particular partial metal layers, and thus the pressing surface with its structure of elevations and depressions.
  • the pressing surface is therefore not formed by an additional hard chrome layer, the production of which is relatively harmful to the environment.
  • the pressing surface is in contact with the workpiece and is therefore subject to wear.
  • the mineral particles are embedded in the individual metal layers. This makes it possible not to cover the pressing surface of the pressing tool with a full-surface hard layer, e.g. made of hard chrome, which, for example, reduces the cost of manufacturing the pressing tool.
  • the mineral particles are embedded in the metal layers of the press tool or the metal layers are applied in layers with the addition of the metal layers.
  • the entire surface of the pressing surface is covered with a hard layer, for example made of hard chrome, or on a full-surface application of a hard layer, e.g. of hard chrome, to the press surface is dispensed with. Dispensing with the hard chrome layer also increases the environmental compatibility of the production of the pressing tool.
  • the metal layers can preferably be tempered, which in the case of nickel layers as metal layers can result in a hardness of at least 1100 HV. This hardness is even greater than the hardness of the hard chrome layer of conventional pressing tools.
  • the production by applying the metal layers in layers is preferably carried out using a galvanic or chemical process, in particular without etching. As a result, the production of the press sheet is relatively environmentally friendly.
  • the metal layers are applied with the addition of the mineral particles using a galvanic process, then the metal layers with the mineral particles embedded therein are dispersion layers.
  • the mineral particles of the metal layers in particular have a Mohs hardness of at least 8.
  • the mineral particles preferably have a size in the nanometer or micrometer range.
  • the mineral particles can be embedded relatively homogeneously in the metal layers, as a result of which the pressing tool has a relatively homogeneous wear resistance over its entire pressing surface.
  • the size of the individual mineral particles can be different or essentially the same.
  • the mineral particles preferably have a volume fraction of at least 50% based on the volume of the corresponding metal layer embedded therein Mineral particles.
  • the desired degree of hardness or the wear resistance of the metal layers can be set on the basis of the size, the proportion by volume and the type of minerals in the mineral particles.
  • the mineral particles are in particular diamond particles.
  • the diamond particles are in particular industrial diamond particles, i.e. the diamond or mineral particles in general can be produced artificially.
  • the minerals silicon carbide, boron nitride, boron carbide, aluminum oxide and titanium oxide in particular can also be used as mineral particles.
  • the mineral particles are designed, for example, as mineral powder, in particular as diamond powder and preferably as industrial diamond powder.
  • the pressing surface is treated after step c).
  • This treatment can include a mechanical treatment and / or a galvanic and / or chemical treatment of the press surface and / or the treatment can take place with a laser.
  • the treatment of the pressing surface can also be a thermal treatment, e.g. an annealing.
  • the pressing tool comprises the multiple metal layers applied one on top of the other with the mineral particles embedded therein. Since the metal layers were only applied to the areas not covered by the corresponding masks, these metal layers are partial metal layers, that is to say not all-over metal layers.
  • the pressing surface of the pressing tool can have different degrees of gloss in areas, which are in particular predetermined degrees of gloss. That is, the press surface can have areas of different degrees of gloss, in particular areas of predetermined different degrees of gloss.
  • the metal of at least two metal layers differs in order to provide the areas with different degrees of gloss receive. This enables the areas of different degrees of gloss to be realized in a relatively simple manner.
  • the layer composite of metal layers obtained up to that point is treated before the last or topmost metal layer is applied.
  • This treatment can include a mechanical treatment and / or a galvanic and / or chemical treatment of the press surface and / or the treatment can take place with a laser.
  • the masks can preferably be applied as a function of image data that are assigned to the structure of the press surface.
  • the pressing tool can in particular be produced as a function of the structure of the image data assigned to the structured pressing surface.
  • the masks are preferably applied as a function of these image data which are assigned to the structure of the structured press surface.
  • the pressing surface is assigned to a natural material such as wood or stone.
  • a natural material such as wood or stone.
  • an original for example a piece of wood or a stone, is scanned in order to obtain image data.
  • image data include, in particular, information about the structure that the press surface should have.
  • the image data obtained as a result of the scanning can be edited manually, for example, in order to obtain the image data assigned to the structure of the press surface.
  • the masks are applied, for example, by means of a print head.
  • the press tool is a press plate
  • the masks are preferably applied with such a print head which is arranged above the press surface to be produced and which is moved in a plane parallel to the press surface during the application of the masks. Since the layer composite from the currently applied metal layers is higher, it is preferable to that the printhead is moved in a direction at right angles to the press surface, so that the distance between the currently applied mask and the printhead is kept constant. Due to the constant distance, the currently applied mask can be applied better with the print head.
  • FIG. 4 shows a device for applying masks.
  • FIG. 1 shows, in a perspective illustration, a press plate 1 with a press surface 2 as an example of a press tool.
  • FIG. 2 shows a section of a side view of the press plate 1 and
  • FIG. 3 shows an intermediate stage of the press plate 1 during its lowering position.
  • the pressing surface 2 comprises a structure of depressions 3 and elevations 4 and is assigned to a wood grain, for example.
  • the pressing surface 2 is rectangular and has a transverse dimension 7 and a longitudinal dimension 8.
  • the structure of the structured pressing surface 2 extends along a preferred direction 6, which in the case of the present exemplary embodiment runs along the longitudinal extent 8.
  • the press plate 1 comprises a base carrier 21 made of steel and several metal layers 22 arranged one above the other or in layers, in each of which mineral particles 23 are embedded and which are arranged on the base carrier 21.
  • the metal layers 22 are in particular nickel layers.
  • the metal layers 22 with mineral particles 23 embedded therein form the pressing surface 2.
  • the mineral particles 23 in particular have a Mohs hardness of at least 8 and a size in the nanometer or micrometer range.
  • the volume fraction of the mineral particles 23 is preferably at least 50% based on the volume of the metal layer 22 with mineral particles 23 embedded therein.
  • the mineral particles 23 are industrial diamond particles.
  • the metal layers 22 were produced by a chemical or galvanic process.
  • the pressing plate 1 was made etch-free by applying a mask 24 to cover areas, applying a metal layer 22 to the areas 25 not covered by the mask 24 with the addition of mineral particles 23, and this was repeated until the pressing surface 2 with the Structure from the elevations 4 and depressions 3 by multiple, layer-by-layer application of masks 24 and metal layers 22 with the addition of mineral particles 23.
  • FIG. 3 shows a detail of a side view in a sectional illustration of an intermediate stage of the press plate 1 during its manufacture.
  • FIG. 3 shows a layer composite made up of several one above the other arranged or layered overlaid metal layers 22 with mineral particles 23 embedded therein, on which a mask 24 is applied in order to cover areas.
  • a further metal layer 22 is applied to this layer composite with the addition of mineral particles 23. As already described, this is repeated until the pressing surface 2 with the structure of the elevations 4 and depressions 3 is created.
  • the metal layers 22 with mineral particles 23 embedded therein are partial metal layers.
  • FIG. 4 shows, in a plan view, an example of a device 41 for applying the masks 24 to the layer composite.
  • this includes a support table 42 which has a support surface 44 made from a plurality of individual plane surfaces 43.
  • the base carrier 21 is first placed on the support surface 42 in such a way that the side on which the press surface 2 is to be built faces away from the support surface 44.
  • the support surface 44 is in particular rectangular and has dimensions that are adapted to the dimensions of the press plate 1.
  • the device 41 comprises an electronic control device 45 which controls the operation of the device 41.
  • suction openings are formed in the plane surfaces 43, which draws the press plate 1 or the base support 21 onto the plane surfaces 43 by means of a vacuum pump of the device 41, not shown and controlled by the electronic control device 45, whereby the press plate 1 or its The base support is fixed on the support surface 44.
  • the device 41 is designed in such a way that the press plate 1 fixed on the support surface 44 or its base carrier 21 is arranged between the support surface 44 and the print head 49. It is thus possible, controlled by the electronic control device 45, to move the print head 49 to the desired position relative to the base carrier 21. In particular, it is provided that the print head 49 is moved in the direction perpendicular to the press surface 2 by means of the electric drive 52 in such a way that the distance between the currently applied mask 24 and the print head 49 is kept constant
  • the pressing surface 2 is assigned to a wooden surface.
  • an original for example a wooden surface
  • image data include, in particular, information about the structure that the pressing surface 2 is to have.
  • the image data obtained as a result of the scanning can be edited manually, for example, in order to obtain image data 5 assigned to the structure of the press surface 2.
  • the masks 24 and the metal layers 22 are applied as a function of the image data 5 assigned to the structure of the press surface 2.
  • the image data 5 assigned to the structure of the press surface 2 are stored in the electronic control device 45.
  • the electronic control device 45 is set up in particular to control the electric drive 50, the further electric drive 51 and the print head 49 as a function of the image data 5.
  • the pressing surface 2 is cleaned if necessary in order to remove residues of the masks 24, for example.
  • the pressing surface 2 has in particular areas with different, preferably predetermined degrees of gloss.
  • the metal of at least two metal layers 22 differs.
  • the layer composite composed of metal layers 22 is removed before the last or topmost metal layer is applied is treated.
  • This treatment can include mechanical treatment, for example polishing or matting, and / or galvanic and / or chemical treatment of the pressing surface 2 and / or the treatment can be carried out with a laser.
  • the pressing surface 2 can still be treated.
  • This treatment can include a mechanical treatment, for example a polishing, and / or a galvanic and / or a chemical treatment of the pressing surface 2 and / or the treatment can take place with a laser.
  • the treatment of the pressing surface 2 can also be a thermal treatment, for example annealing of the pressing surface 2.
  • the pressing surface 2 can have a hardness of, for example, at least 1100 HV, particularly in the case of nickel layers.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • Electrochemistry (AREA)
  • Mounting, Exchange, And Manufacturing Of Dies (AREA)
  • Other Surface Treatments For Metallic Materials (AREA)
  • Shaping Of Tube Ends By Bending Or Straightening (AREA)
  • Electroplating Methods And Accessories (AREA)

Abstract

L'invention concerne un procédé de fabrication d'un moule à compression (1, 51) destiné à être utilisé pour fabriquer une pièce, ce moule présentant une surface de compression (2) pourvue d'une structure constituée de parties saillantes (4) et de creux (3). Selon ce procédé, un masque (24) est appliqué pour recouvrir des zones, puis une couche de métal (22) est appliquée sur les zones (25) non recouvertes par le masque (24) avec addition de particules minérales (23). Cette étape est répétée jusqu'à ce que la surface de compression (2) pourvue de la structure constituée de parties saillantes (4) et de creux (3) soit formée par application répétée, par couches, de masques (24) et de couches de métal (22) avec addition de particules minérales (23).
EP20793288.0A 2019-10-15 2020-10-12 Moule à compression et procédé de fabrication d'un moule à compression Pending EP4045308A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102019127658.6A DE102019127658A1 (de) 2019-10-15 2019-10-15 Presswerkzeug und Verfahren zum Herstellen eines Presswerkzeugs
PCT/EP2020/078581 WO2021074066A1 (fr) 2019-10-15 2020-10-12 Moule à compression et procédé de fabrication d'un moule à compression

Publications (1)

Publication Number Publication Date
EP4045308A1 true EP4045308A1 (fr) 2022-08-24

Family

ID=72944108

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20793288.0A Pending EP4045308A1 (fr) 2019-10-15 2020-10-12 Moule à compression et procédé de fabrication d'un moule à compression

Country Status (6)

Country Link
US (1) US20240002989A1 (fr)
EP (1) EP4045308A1 (fr)
CN (1) CN114555348A (fr)
AU (1) AU2020368599A1 (fr)
DE (1) DE102019127658A1 (fr)
WO (1) WO2021074066A1 (fr)

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Publication number Priority date Publication date Assignee Title
US20220228284A1 (en) * 2021-01-18 2022-07-21 Eagle Technology, Llc Nanodiamond article having a high concentration nanodiamond film and associated method of making
DE102021131838A1 (de) * 2021-12-02 2023-06-07 Hueck Rheinische Gmbh Verfahren und Druckervorrichtung zum Herstellen eines Presswerkzeugs

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Also Published As

Publication number Publication date
WO2021074066A1 (fr) 2021-04-22
DE102019127658A1 (de) 2021-04-15
US20240002989A1 (en) 2024-01-04
AU2020368599A1 (en) 2022-05-26
CN114555348A (zh) 2022-05-27

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