WO2022109924A1 - Plaque arrière en acier-plastique à bord enroulé pour écran et son procédé de fabrication - Google Patents

Plaque arrière en acier-plastique à bord enroulé pour écran et son procédé de fabrication Download PDF

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Publication number
WO2022109924A1
WO2022109924A1 PCT/CN2020/131766 CN2020131766W WO2022109924A1 WO 2022109924 A1 WO2022109924 A1 WO 2022109924A1 CN 2020131766 W CN2020131766 W CN 2020131766W WO 2022109924 A1 WO2022109924 A1 WO 2022109924A1
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WO
WIPO (PCT)
Prior art keywords
steel
plastic
body structure
bending
panel
Prior art date
Application number
PCT/CN2020/131766
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English (en)
Chinese (zh)
Inventor
郝建广
游辉勇
吴金亮
贺松炎
熊奕涵
刘华彬
邝伟康
袁康
姚杰
Original Assignee
东莞市豪顺精密科技有限公司
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.)
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Application filed by 东莞市豪顺精密科技有限公司 filed Critical 东莞市豪顺精密科技有限公司
Priority to PCT/CN2020/131766 priority Critical patent/WO2022109924A1/fr
Publication of WO2022109924A1 publication Critical patent/WO2022109924A1/fr

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
    • B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods

Definitions

  • the invention belongs to the technical field of steel-plastic panels, and in particular relates to a rolled-edge steel-plastic back panel for displays and a manufacturing method thereof.
  • the front part is a module display assembly carried by a back plate stamped and formed from a metal sheet
  • the middle part is a central control unit composed of various circuit boards.
  • the outer part is a plastic back cover.
  • the module and the circuit board of the display device are installed on the front side and the back side of the backplane respectively, and the plastic cover wraps the circuit board for protection.
  • the existing steel-plastic board is formed by pressing two layers of iron plates and a plastic plate between the two layers of iron plates, and then it is cut into standard-sized steel-plastic plates by slitting. It has the characteristics of light weight and high strength and is in line with TV
  • the ultra-thin back plate is required, but the plastic plate in the middle of the steel-plastic plate is difficult to bend and form. It can only be used for general punching and cutting processing. The scope of use is limited, and the middle plastic layer can be seen in the cross section.
  • the direct exposure is not beautiful. It is still necessary to paste an aluminum middle frame on the steel-plastic board, and then install the screen module on the middle frame. The production process is long and the aluminum middle frame is expensive, so the steel-plastic board is limited. Development in the LCD TV industry.
  • the purpose of the present invention is to provide a crimped steel-plastic backboard for a display and a manufacturing method thereof, which ensures the stability of the crimping and bending of the steel-plastic sheet.
  • the present invention provides a method for manufacturing a rolled edge steel-plastic panel backplane for a display, comprising the following steps:
  • the steel-plastic panel back panel includes a thick-body structure and a thin-body structure located at the periphery of the thick-body structure; then the thin-body structure of the steel-plastic panel is prepared The hemming process is pre-bent and the structure to be rolled is formed;
  • the thin structure of the steel-plastic panel is bent to form a bending structure
  • the edge of the bending structure is rolled or rounded from bottom to top in parallel with the roll structure.
  • the height of the structure to be rolled and folded is 0.25-0.35mm, and the width is 0.45-0.55mm.
  • a protruding structure connected to the bending structure is formed in the process of forming the bending structure.
  • it also includes the step of: performing a separate side-cutting process on the protruding structure.
  • the present invention also provides a method for manufacturing a rolled edge steel-plastic panel backplane for a display, comprising the following steps:
  • the steel-plastic panel back panel includes a thick-body structure and a thin-body structure located at the periphery of the thick-body structure;
  • the thin-body structure of the steel-plastic panel is at least One end is bent to form a bending structure, and a protruding structure connected to the bending structure is formed in the process of forming the bending structure;
  • the present invention also provides a method for manufacturing a rolled edge steel-plastic panel backplane for a display, comprising the following steps:
  • S1 firstly cut the steel-plastic panel and form the unfolded shape of the crimped steel-plastic back panel, the steel-plastic panel back panel includes a thick body structure and a thin body structure located at the periphery of the thick body structure; then the thin body of the steel plastic panel is cut Structural pre-crimping is performed to pre-bend and form the to-be-folded structure;
  • the present invention also provides a rolled-edge steel-plastic backplane for a display, which includes a steel-plastic backplane, the steel-plastic backplane includes a thick-body structure and a thin-body structure located at the periphery of the thick-body structure; the backplane Also included is a shaped structure formed by bending and/or crimping the thin body structure.
  • the steel-plastic panel comprises an outer surface layer, an interlayer located on the surface layer, and a metal layer located on the interlayer, and the length and width of the surface layer are greater than the lengths of the interlayer and the metal layer. and width, the length and width of the interlayer and the metal layer are the same, and the thin body structure extends from the surface layer and is located on the side of the interlayer and the metal layer.
  • the material of the surface layer is VCM plate or aluminum material or stainless steel.
  • the material of the interlayer is ABS, or PC or ABS+PC or PP honeycomb panel; the metal layer is aluminum or stainless steel.
  • the invention solves the problems of hemming and bending of the steel-plastic panel, ensures the stability of the hemming and bending of the steel-plastic panel, realizes the mass production of the hemming and bending of the steel-plastic panel, and solves the problem of the traditional steel-plastic panel.
  • the weakness of the plastic board that cannot be bent and processed widens the available space of the film-coated board and forms an ultra-thin backplane; the rolled steel-plastic backplane not only achieves innovation in the structure and appearance, but also optimizes the manufacturing process of the display screen. In order to de-process to reduce manpower and material resources, and realize cost reduction.
  • Fig. 1 is the structural schematic diagram of the curling steel-plastic backplane used for the display according to the present invention
  • Fig. 2 is a schematic diagram of the split structure of the hemmed steel-plastic backboard shown in Fig. 1 before bending and/or hemming (or rounding);
  • 3 and 4 are schematic structural diagrams of one of the manufacturing steps of a steel-plastic backplane for a display
  • 5 and 6 are schematic structural diagrams of the second manufacturing step of a steel-plastic backplane for a display
  • FIG. 7 and 8 are schematic structural diagrams of the third manufacturing step of a steel-plastic backplane for a display
  • 9 and 10 are schematic structural diagrams of the fourth step of manufacturing a steel-plastic backplane for a display
  • Fig. 11 shows the structural schematic diagram of the mold of the crimping steel-plastic back plate
  • Figure 12 shows a schematic diagram of the structure of the mold part of the first curling steel-plastic back plate
  • Figure 13 shows a schematic diagram of the structure of the mold part of the second hemming steel-plastic back plate
  • Fig. 14 is a schematic diagram showing the structure of the mold part of the fourth hemming steel-plastic back plate.
  • the crimped steel-plastic plate backplane used for the display of the present invention is used as the backplane of the display 10.
  • the steel-plastic panel 20 includes a surface layer 21 located on the outer side, an interlayer 22 located on the surface layer 21 and a metal layer 23 located on the interlayer 22.
  • the surface layer 21, the interlayer 22 and the metal layer 23 are pressed together.
  • the steel-plastic panel 20 is formed, the interlayer 22 is a plastic interlayer, the length and width of the surface layer 21 are greater than the length and width of the interlayer 22 and the metal layer 23, and the length and width of the interlayer 22 and the metal layer 23 are the same.
  • the material of the surface layer 21 is VCM plate or other appearance materials such as aluminum or stainless steel, wherein the VCM plate is a metal color laminated steel plate with steel plate as the base material, and vinyl chloride is rolled on the surface of the base material.
  • the material of the interlayer 22 is ABS (a ternary copolymer of three monomers of acrylonitrile (A), butadiene (B) and styrene (S)) or PC (polycarbonate, which is a polymer polymer material) or ABS+PC (alloy material with the majority of ABS components) or PP honeycomb panel (a board made of two thinner panels firmly adhered to both sides of a thicker honeycomb core material, also known as Honeycomb sandwich structure, the material is mainly PP) and other light and thin materials.
  • the metal layer 23 is made of other bonding materials such as aluminum or stainless steel.
  • the surface layer 21, the interlayer 22 and the metal layer 23 are laminated to form a steel-plastic panel 20.
  • the steel-plastic panel 20 includes a thick-body structure 201 located in the middle and a thin-body structure 202 located on both sides of the thick-body structure 201.
  • the structure 201 carries the display 10 , and the glue 30 is bonded to connect the thick structure 201 and the display 10 .
  • the thickness of the interlayer 22 is not necessarily, and the thickness of the interlayer 22 is set according to actual needs, for example, the thickness is 1-2 mm; the thickness of the surface layer 21 and the metal layer 23 is 0.3-0.5 mm; the thickness of the metal layer 23
  • the surface is provided with anti-fingerprint coating (not shown), the thickness of anti-fingerprint coating is 5-10um, and the anti-fingerprint coating has anti-fingerprint and anti-rust functions.
  • the thickness of the steel-plastic board 20 is 1.2-5.0 mm.
  • the thin body structure 202 is extended from the surface layer 21 and is located on the side of the interlayer 22 and the metal layer 23.
  • the thin body structure 202 is used as the utilization space of the steel-plastic panel 20, and the thin body structure 202 is used for bending and hemming (rolling).
  • the edges include various forming methods such as single folding, single folding, rounding, multiple bending, etc., as well as any structure that can be bent and formed by all thin plates), and the end of the thin structure 202 is formed by bending and curling to form a positioning display.
  • the molding structure 203 of 10 the molding structure 203 is formed by the thin body structure 202 by bending and hemming. After the thin body structure 202 is crimped to form the molding structure 203 , the steel-plastic panel 20 becomes a crimped-steel-plastic panel backplane for the display.
  • the present invention is used for the manufacturing method of the curled steel-plastic panel backplane of the display, and the steel-plastic panel 20 is curled to form the molding structure 203, which includes the following steps:
  • the function of the to-be-folded structure 301 is to pre-cut and fold the edge of the steel-plastic panel 20 to ensure the hemming process of the steel-plastic panel 20 afterward. In this way, cutting can also be omitted and pre-folding can be performed directly. Since the material of the thin structure 202 of the steel-plastic panel 20 is VCM plate or other appearance materials such as aluminum or stainless steel, when the thin structure 202 is crimped, the tolerance of the material is about ⁇ 1mm, which will cause the pre-folding to not be in place. Therefore, step S1 directly completes the cutting (cutting to form the shape structure mold corresponding to the steel-plastic panel 20 before it is not crimped) and pre-folding (forming the structure to be rolled 301 ).
  • the thin structure 202 of the steel-plastic panel 20 is subjected to a bending process (bending is performed according to the needs of fixing the display screen, which can be 90 degrees or 75 degrees, etc.) to form a bending structure 302 , since the material of the thin body structure 202 is VCM sheet or other appearance materials such as aluminum or stainless steel, a protruding structure (not shown) connected to the bending structure 302 is formed in the process of forming the bending structure 302;
  • a rolled-edge steel-plastic panel backplane for a display is formed, and the roll structure 303 and the bending structure 302 constitute the molding structure 203 .
  • the invention is used for the curling steel-plastic plate backplane of the display and the manufacturing method thereof, which solves the problems of curling and bending of the steel-plastic plate, and ensures the stability of the curling, bending and reverse-folding of the steel-plastic plate. It realizes the mass production of hemming and bending of steel-plastic panels, solves the weakness of traditional steel-plastic panels that cannot be bent, and widens the available space of film-coated panels; Realize innovation, and optimize the manufacturing process of the display screen, realize the de-proceduralization to reduce manpower and material resources, and realize cost reduction.
  • the present invention designs a set of production molds for a curling steel-plastic backplane for each step, which requires the first curling steel-plastic backplane
  • the production mold realizes the above-mentioned step S1
  • the production mold for the second hemming steel-plastic back plate realizes the above-mentioned step S2
  • the production mold for the third hemming steel-plastic back plate realizes the above-mentioned step S3 and the fourth hemming
  • the production mold for the steel-plastic back plate The above step S4 is implemented.
  • Figure 11 is a schematic diagram showing the structure of the production mold for the curling steel-plastic backplane for the display, the production mold for the first curling steel-plastic backplane, the second curling steel-plastic backplane, the third curling
  • the production mold of the steel-plastic backboard and the production mold of the fourth hemming steel-plastic backboard both include an upper template 006 located outside the surface layer 21 of the steel-plastic
  • the upper template fixing device includes: an upper support plate 001 located above, a plurality of upper feet 002 fixed under the upper support plate 001, an upper mold base 003 pressed and held by the plurality of upper support feet 002, and sequentially fixed on the upper mold base 003
  • the first ejector pin 024 below.
  • the upper template 006 is located between the plurality of upper stripping plates 007 and below the travel plate 018 .
  • the first fixing pin 019 and the first screw 021 are fixedly connected to the upper die base 003 , the upper backing plate 004 , the upper clamping plate 005 and the upper stripping plate 007 in sequence.
  • the first inner guide post 020 and the second screw 022 are fixedly connected to the upper die base 003, the upper backing plate 004, the upper clamping plate 005, the travel plate 018 and the upper die plate 006;
  • the third screw 023 is fixedly connected to the upper die base 003 and the upper backing plate 004 ;
  • the first top material pin 024 is fixedly connected to the upper backing plate 004, the upper splint 005, the travel plate 018 and the upper template 006;
  • the first fixing pin 019, the first screw 021, the first inner guide post 020, the second screw 022 and the first Three screws 023 are arranged in sequence.
  • the upper spring 041 is located between the upper die base 003 , the upper backing plate 004 and the upper clamping plate 005 , so that the upper die holder 003 , the upper backing plate 004 and the upper clamping plate 005 have elasticity and act on the upper die plate 006 .
  • the lower template fixing device includes a lower supporting plate 013 located below, a plurality of lower supporting feet 012 fixed on the lower supporting plate 013, a lower mold base 011 supported by the plurality of lower supporting feet 012, and fixed above the lower mold base 011 and supporting the lower template 009
  • the inner limit post 015 and the lower release plate insert 016 are arranged in the support plate 008 and close to the lower outer limit column 014, and some of the lower release plate inserts 016 are located in the lower support plate 008 and are arranged next to the inner limit column
  • the lower template 009 is located on the lower backing plate 010 and its sides are supported by the lower supporting plate 008 .
  • the seventh screw 033 is fixedly connected to the lower die base 011 and the lower foot 012; the second inner guide post 025 and the fourth screw 026 are fixedly connected to the lower support plate 008, the lower backing plate 010 and the lower die base 011; the second fixing pin 027 and the first
  • the five screws 028 fixedly connect the lower plate 010 and the lower die base 011; the third fixing pin 029 and the fifth screw 030 fixedly connect the lower plate 009 and the lower plate 010.
  • the lower spring 041 is disposed close to the lower outer limit post 014 and acts on the lower release plate 008 .
  • the lower spring 041 is located between the lower die base 011 and the lower backing plate 010 .
  • the first topping pin 024 is held outside the surface layer 21 of the steel-plastic board 20 , and the second topping pin 032 is held against the metal layer 23 of the steel-plastic board 20 .
  • the production mold of the first crimping steel-plastic backboard further includes a shearing edge 401 , and the structure 301 to be rolled in step S1 is formed by the shearing edge 401 , and the height of the shearing edge 401 is 0.25-0.35mm (preferably 0,30mm, specifically a material thickness), the width is 0.45-0.55mm (preferably 0,50mm).
  • the profiling groove structure 000 is the same as the structure of the steel-plastic panel 20 before hemming, and the profiling groove structure 000 includes a groove 402 located on the surface of the lower template 009 and a groove located between the groove 402 and the lower release plate 008.
  • the depth of the groove 401 is the same as the thickness of the steel-plastic panel 20 , and the thick structure 201 of the steel-plastic panel 20 is placed in the groove 401 ;
  • the steel-plastic board 20 is placed in the profiling groove structure 000 and pressed by the upper template 006 and the lower template 009 to form the to-be-folded structure 301 .
  • step S2 the steel-plastic board 20 is taken out and placed in the production mold of the second crimped-steel-plastic backboard to perform step S2.
  • the production mold for the second hemming steel-plastic backboard further includes: a bending gap 004 located between the lower template 009 and the lower release plate 008 and located at the end of the profiling groove structure 000;
  • the avoidance structure 405 communicated by the bending slit 004 and the solid structure 406 located at the edge of the groove 110 of the profiling groove structure 000 are arranged vertically.
  • the thin body structure 202 in the groove structure 000 forms the bent structure 302 .
  • the avoidance structure 405 is used to avoid the to-be-folded structure 301 .
  • the position of the solid structure 406 is used to form the bending structure 302 of the steel-plastic panel 20. This is because when the thin structure 202 of the steel-plastic panel 20 is bent, the bending position is located at the edge of the interlayer 22 formed of plastic material. The material cannot be pressed to death. During the stamping process, the plastic material of the interlayer 22 is easily squeezed out by directly pressing the material in half, so that the bending is unstable. Therefore, the production mold of the second curling steel-plastic backplane needs to be designed with a certain width of the entity.
  • the structure 222 assists in bending to form the bent structure 302 .
  • step S2 After completing step S2 in the production mold of the second hemming steel-plastic backboard, the steel-plastic board 20 is taken out and put into the production mold of the third hemming steel-plastic backboard to perform step S3.
  • the production mold for the third hemming steel-plastic back plate also includes a mold blade 114, which is used for side-cutting the residual material 113 at the corner of the bending structure 302, wherein the mold blade has a dovetail slider ( Not shown in the figure), the dovetail slider is used to remove the remaining material; the side cutting is precision milling and a certain taper is formed.
  • a mold blade 114 which is used for side-cutting the residual material 113 at the corner of the bending structure 302, wherein the mold blade has a dovetail slider ( Not shown in the figure), the dovetail slider is used to remove the remaining material; the side cutting is precision milling and a certain taper is formed.
  • the thin structure 202 of the steel-plastic panel 20 is VCM plate or other appearance materials such as aluminum or stainless steel, the thin structure 202 forms excess material around the corners of the bending structure 302 during the bending process. The material will affect the overall appearance of the back panel, so it needs to be removed.
  • step S3 After completing step S3 in the production mold of the third hemming steel-plastic backboard, the steel-plastic board 20 is taken out and put into the production mold of the fourth hemming-steel-plastic backboard to perform step S4.
  • the production mold for the fourth hemming steel-plastic backboard further includes a hemming groove 407 and a stripping pendulum block 408 connected to the lower module 009 through a spring (not shown).
  • the crimping groove 407 is located below the structure 301 to be rolled up, and the crimping groove 407 is used to form the roll structure 309 from the bottom to the top of the crimped structure 302;
  • the pendulum block 408 removes the crimped steel-plastic backboard from the lower module 009 of the production mold for the fourth crimped-steel-plastic backboard.
  • the stripping pendulum block 408 has the same profiling structure as the bottom layer and the middle interlayer of the steel-plastic board material, and the bottom is circular and movable to increase the stripping effect of the material.
  • the present invention also provides a manufacturing method of a production mold for a rolled edge steel-plastic backboard, comprising the following steps:
  • a production mold for the first curling steel-plastic backboard with an upper template 006 and a lower template 009 is manufactured, and during the manufacturing process of the lower template 009, a profiling groove structure 000 is formed on the surface of the lower template 009, As shown in FIG. 12, the profiling groove structure 000 includes a groove 402 on the surface of the lower template 009 and a groove connecting structure 403 between the groove 402 and the lower release plate 008. The depth of the groove 402 is the same as that of the steel-plastic plate.
  • the thickness of 20 is the same, and the thick body structure 201 of the steel-plastic board 20 is placed in the groove 402; at the same time, a shearing edge 401 is formed at the end of the groove connecting structure 403, and the structure to be rolled in step S1 is formed by the shearing edge 401. 301;
  • a production mold for producing a second curling steel-plastic back plate with an upper template 006, a lower template 009 and a lower release plate 008 located on the side of the lower template 009 is manufactured.
  • a bending gap 004 is formed between the template 009 and the lower stripper plate 008, a side edge of the lower template 009 is formed with an avoidance structure 405 communicating with the bending gap 004, and a solid structure 406 is formed at the edge of the groove 110 of the profiling groove structure 000,
  • the bending slit 004 is vertically arranged with the profiling groove structure 000; the thin structure 202 is pressed and held in the bending slit 004 to form the bending structure 302, the solid structure 406 is assisted by bending to form the bending structure 302, and the avoidance structure 405 is used for To avoid the cutting edge 401;
  • a profiling groove structure 000 is formed on the surface of the lower template 009; at the same time, a die edge 114 is provided, and the die edge 114 is used for side-cutting the residual material 113 at the corner of the bending structure 302 formed in step S2, wherein
  • the die edge has a dovetail slider (not shown in the figure), and the dovetail slider is used to remove the remaining material; the side cutting adopts fine milling and forms a certain taper;
  • a production mold for manufacturing the fourth hemming steel-plastic back plate with the upper template 006, the lower template 009 and the lower release plate 008 located on the side of the lower template 009 as shown in FIG. 11 .
  • a profiling groove structure 000 is formed on the surface of the lower template 009, and the profiling groove structure 000 includes a groove 402 located on the surface of the lower template 009; at the same time, a bend is formed between the lower template 009 and the lower release plate 008.
  • a curling groove 407 at the end of the bending gap 004 and a stripping block 408 connected to the lower template 009 by a spring (not shown) are formed, wherein the curling groove 407 is located in the structure 301 to be rolled and folded.
  • the crimping groove 407 is used to form the roll structure 309 from the bottom to the top of the double-bending structure 302; Remove the lower module 009 of the production mold of the four-rolled steel-plastic backboard.
  • the lower template of the four molds are all The profiling process must be carried out according to the height and thickness of the material to form a profiling groove structure.
  • the lower template of the production mold of the rolled steel-plastic backboard and the lower template of the production mold of the fourth rolled steel-plastic backboard need to be profiled according to this height difference; the production mold of the third rolled steel-plastic backboard adopts
  • the corner is individually side-cut (only the remaining material at the corner of the bending structure 302 formed in step S2 is side-cut and sheared), so that the material width at the corner conforms to the steel-plastic panel in step S4.
  • the round material width avoids the inability to form curling due to the stacking of materials when the two sides are squeezed, and at the same time ensures that cracks occur due to less material.

Abstract

La présente invention concerne une plaque arrière en acier-plastique à bord enroulé pour un écran (10) et son procédé de fabrication. Le procédé comprend les étapes consistant à : dans un premier temps, découper une plaque en acier-plastique (20) pour former une forme d'une plaque arrière en acier-plastique à bord enroulé non pliée, la plaque arrière en acier-plastique comprenant une structure de corps épaisse (201) et des structures de corps minces (202) situées sur la périphérie de la structure de corps épaisse (201) ; puis réaliser un traitement d'enroulement des bords sur chaque structure de corps mince (202) de la plaque en acier-plastique (20) pour former, à une position de pré-pliage, une structure (301) à enrouler ; effectuer un traitement de pliage à 90 degrés sur chaque structure de corps mince (202) de la plaque en acier-plastique (20) pour former une structure pliée (302) ; et effectuer un traitement d'enroulement de bord ou de laminage de bord sur la partie extrémité de chaque structure pliée (302) de bas en haut pour former une structure de corps enroulée (303). La présente invention résout les problèmes selon lesquels la plaque en acier-plastique (20) n'est pas facile à plier et à enrouler au niveau des bords, assure la stabilité des bords enroulés et des plis de la plaque en acier-plastique (20), met en œuvre la production en série des bords enroulés et des plis des plaques en acier-plastique (20), élargit l'espace d'utilisation d'une plaque revêtue de film ; et les procédures sont réduites, et les objectifs de réduction de la main-d'œuvre et des ressources matérielles et de réduction des coûts sont atteints.
PCT/CN2020/131766 2020-11-26 2020-11-26 Plaque arrière en acier-plastique à bord enroulé pour écran et son procédé de fabrication WO2022109924A1 (fr)

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PCT/CN2020/131766 WO2022109924A1 (fr) 2020-11-26 2020-11-26 Plaque arrière en acier-plastique à bord enroulé pour écran et son procédé de fabrication

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