CN214098017U - A backplate is moulded to turn up steel for display - Google Patents

Abstract

The utility model provides a curled steel-plastic backboard for a display, which comprises a thick structure and a thin structure positioned at the periphery of the thick structure; the steel-plastic back plate also comprises a forming structure formed by bending and/or curling the thin body structure. The utility model solves the problems of edge curling and bending of the steel-plastic backboard, ensures the stability of edge curling and bending of the steel-plastic backboard, realizes the mass production of the edge curling and bending of the steel-plastic backboard, solves the weak point that the traditional steel-plastic board can not be bent and processed, and widens the available space of the film-coated board; the process is removed, manpower and material resources are reduced, and cost reduction is realized.

Description

A backplate is moulded to turn up steel for display

Technical Field

The utility model belongs to the technical field of the steel-plastic panel, especially, relate to a backplate is moulded to turn-up steel for display.

Background

The back shell of the existing LCD TV display screen and LCD is mostly composed of three parts, the front part is a module display assembly taking a back plate formed by punching metal plates as a bearing, the middle part is a central control integration combined by various circuit boards, and the outer layer part is a plastic back cover. The module and the circuit board of the display device are respectively arranged on the front side and the rear side of the back plate, and the plastic surface shell wraps the circuit board to play a role in protection. With the development of the liquid crystal display screen towards thinning, in order to pursue a visual ultrathin effect, the central control integration and the rear cover which are originally scattered and distributed on the back of the whole backboard are gradually reduced to the bottom, and only the thickness of the display assembly supported by the backboard can still not meet the urgent demand of a consumer on ultrathin.

The existing steel-plastic plate is formed by pressing 2 layers of iron plates and plastic plates located between 2 layers of iron plates, then the steel-plastic plate with the specification and size is cut into strips, the characteristics of light weight and high strength meet the ultrathin requirement of a television backboard, but the plastic plates in the middle of the steel-plastic plate are difficult to bend and form, and the steel-plastic plate can only be used for general punching and cutting processing, the application range is limited, the middle plastic layer can be seen on the section, the middle plastic plate is directly exposed and not attractive, an aluminum middle frame still needs to be adhered to the steel-plastic plate, and then a screen module is installed on the middle frame.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a backplate is moulded to steel of stability of the turn-up of having guaranteed steel-plastic panel and having bent.

The utility model provides a curled steel-plastic backboard for a display, which comprises a thick structure and a thin structure positioned at the periphery of the thick structure; the steel-plastic back plate also comprises a forming structure formed by bending and/or curling the thin body structure.

Further, the forming structure comprises a bending structure which is bent by the thin-body structure and a roll-body structure which is positioned at the end part of the bending structure.

Further, the molding structure includes a bending structure that is bent by a thin structure.

Further, the forming structure includes a roll structure formed by curling or rolling a thin-body structure.

Further, the steel-plastic back plate comprises a surface observing layer positioned on the outer side, an interlayer positioned on the surface observing layer and a metal layer positioned on the interlayer, wherein the length and the width of the surface observing layer are both larger than those of the interlayer and the metal layer, the length and the width of the interlayer and the metal layer are the same, and the thin body structure is the side edge which is extended out of the surface observing layer and is positioned on the interlayer and the metal layer.

Further, the material of the viewing surface layer is a VCM plate or aluminum material or stainless steel.

Further, the material of the interlayer is ABS, or PC or ABS + PC or PP honeycomb plate.

Further, the metal layer is made of aluminum or stainless steel.

The utility model solves the problems of edge curling and bending of the steel-plastic backboard, ensures the stability of edge curling and bending of the steel-plastic backboard, realizes the mass production of the edge curling and bending of the steel-plastic backboard, solves the weak point that the traditional steel-plastic board can not be bent, widens the available space of the film-coated board and forms the ultrathin backboard; the steel-plastic backboard with the turned edge not only realizes innovation in structural appearance, but also optimizes the manufacturing process flow of the display screen, realizes the removal of procedures, reduces manpower and material resources, and realizes cost reduction.

Drawings

Fig. 1 is a schematic structural view of a curled steel-plastic backboard for a display according to the present invention;

fig. 2 is a schematic view of a split structure of the curled steel-plastic backboard for display shown in fig. 1 before bending and/or curling (or rolling);

fig. 3 and 4 are schematic structural diagrams showing one of the manufacturing steps of the steel-plastic back plate for the display;

fig. 5 and 6 are schematic structural diagrams showing a second manufacturing step of the steel-plastic back plate for the display;

fig. 7 and 8 are schematic structural diagrams showing a third manufacturing step of a steel-plastic back plate for a display;

fig. 9 and 10 are schematic structural views showing four manufacturing steps of the steel-plastic back plate for the display;

fig. 11 is a schematic structural view of a mold for a beaded steel-plastic backsheet for a display;

FIG. 12 is a schematic structural view of a mold part of a first flanged steel-plastic back plate;

fig. 13 is a schematic structural view of a mold part of the second crimped steel-plastic backing plate;

fig. 14 is a structural schematic view of a mold part of the fourth crimped steel-plastic back plate.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention will be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention.

The utility model discloses a backplate is moulded to turn up steel for display is as display 10, as shown in fig. 1 and fig. 2, a backplate is moulded to turn up steel for display is moulded backplate 20 and is formed through bending and turn up by steel, steel is moulded backplate 20 including the face layer 21 of seeing that is located the outside, be located the intermediate layer 22 of seeing on the face layer 21 and be located the metal level 23 on intermediate layer 22, see face layer 21, intermediate layer 22 and metal level 23 are moulded backplate 20 through pressfitting formation steel, intermediate layer 22 is the plastics intermediate layer, the length and the width of seeing face layer 21 all are greater than the length and the width of intermediate layer 22 and metal level 23, the length and the width of intermediate layer 22 and metal level 23 are the same.

The surface layer 21 is made of VCM sheet material, aluminum material, stainless steel or other appearance material, wherein the VCM sheet material is a color metal laminated steel sheet with vinyl chloride roll-coated on the surface of the substrate. The interlayer 22 is made of other light and thin materials such as Acrylonitrile Butadiene Styrene (ABS) (a), butadiene styrene (B), styrene (S), or a copolymer of acrylonitrile butadiene styrene (S), or a Polycarbonate (PC), or an alloy material containing mostly ABS and PC (ABS), or a PP honeycomb panel (a plate made of two thin panels firmly adhered to two sides of a thick honeycomb core, also called a honeycomb interlayer structure, and made of mainly PP). The metal layer 23 is made of other bonding materials such as aluminum material and stainless steel.

The viewing surface layer 21, the interlayer 22 and the metal layer 23 are laminated to form the steel-plastic back panel 20, the steel-plastic back panel 20 includes a thick structure 201 located in the middle and thin structures 202 located at two sides of the thick structure 201, the thick structure 201 bears the display 10, and the colloid 30 is adhered to and connected with the thick structure 201 and the display 10.

In the present embodiment, the thickness of the interlayer 22 is not necessarily required, 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 surface of metal level 23 is equipped with resistant fingerprint coating (not shown), and the thickness of resistant fingerprint coating is 5-10um, and resistant fingerprint coating has anti fingerprint and antirust action. The thickness of the steel-plastic back plate 20 is 1.2-5.0 mm.

The thin structure 202 is extended from the viewing surface layer 21 and located at the side of the interlayer 22 and the metal layer 23, the thin structure 202 is used as a utilization space of the steel-plastic backboard 20, bending and curling are performed through the thin structure 202 (the curling includes a plurality of forming modes such as single curling, single flanging, rolling, multiple bending and the like, and any thin plate can be bent and formed), the end of the thin structure 202 forms a forming structure 203 for positioning the display 10 through bending and curling, and the forming structure 203 is formed by bending and curling the thin structure 202. After the thin body structure 202 is crimped to form the forming structure 203, the steel-plastic back plate 20 becomes a crimped steel-plastic back plate for a display.

The utility model discloses a manufacturing approach that backplate was moulded to curling steel for display carries out the curling to steel-plastic backplate 20 and forms forming structure 203, includes following step:

s1: as shown in fig. 3 and 4, the steel-plastic back plate 20 is first cut and formed in an unfolded shape of the hemmed steel-plastic back plate; then pre-crimping the thin body structure 202 of the steel-plastic back plate 20 to form a pre-crimped part and form a structure 301 to be crimped, wherein the height of the structure 301 to be crimped is 0.25-0.35mm (specifically, one material thickness), and the width of the structure to be crimped is 0.45-0.55 mm;

the to-be-rolled structure 301 is used for performing edge rolling and pre-cutting on the steel-plastic back plate 20, so that the edge rolling process of the steel-plastic back plate 20 is ensured. In this way, the cutting material can be omitted and the pre-folding can be directly carried out. Since the material of the thin structure 202 of the steel-plastic back plate 20 is VCM sheet material, aluminum material, stainless steel or other appearance material, and when the thin structure 202 is curled, the tolerance of the material is about ± 1mm, which may cause the risk of not being folded in place, step S1 is directly completed by cutting the material (the shape structure mold corresponding to the steel-plastic back plate 20 before the material is cut into the shape before the curled edge) and pre-folding (forming the structure to be folded 301).

S2: as shown in fig. 5 and 6, the thin body structure 202 of the steel-plastic back plate 20 is subjected to a bending process (bending according to the requirement of fixing the display screen, which may be 90 degrees or 75 degrees, etc.) and forms a bending structure 302, and since the material of the thin body structure 202 is VCM plate material or other appearance material such as aluminum material 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;

s3: as shown in fig. 7 and 8, a single side cutting process is performed on the corners (i.e., the protruding structures) of the bending structure 302, so that the material around the bending corners is just subjected to a hemming structure, and is not excessive and wrinkled;

s4: as shown in fig. 9 and 10, the end of the double-folded structure 302 is curled or rounded from bottom to top and is connected to a rolling structure 303, and the end of the rolling structure 303 is the structure 301 to be rolled.

The curled steel-plastic back plate for the display is formed through the four steps, and the roll structure 303 and the bending structure 302 form the forming structure 203.

The utility model discloses a turn-up steel-plastic backboard for display and manufacturing method thereof, has solved the problem of steel-plastic backboard turn-up and bending, has guaranteed the stability of turn-up, bending and the reverse hem of steel-plastic backboard, has realized the volume production nature of turn-up and bending of steel-plastic backboard, has solved the weak point that traditional steel-plastic board can't be bent and processed, has widened the usable space of tectorial membrane board; the steel-plastic backboard with the turned edge not only realizes innovation in structural appearance, but also optimizes the manufacturing process flow of the display screen, realizes the removal of procedures, reduces manpower and material resources, and realizes cost reduction.

In order to realize that four above-mentioned steps form the backplate is moulded to the turn-up steel that is used for the display, the utility model discloses to every step design the production mould that backplate was moulded to one set of turn-up steel, the production mould that backplate was moulded to first turn-up steel is required respectively to realize above-mentioned step S1, the production mould that backplate was moulded to the second turn-up steel realizes above-mentioned step S2, the production mould that backplate was moulded to the third turn-up steel realizes above-mentioned step S3 and the production mould that backplate was moulded to the fourth turn-up steel realizes above-mentioned step S4.

Fig. 11 shows a schematic structural diagram of a production mold of a beaded steel-plastic backboard, where the production mold of the first beaded steel-plastic backboard, the production mold of the second beaded steel-plastic backboard, the production mold of the third beaded steel-plastic backboard, and the production mold of the fourth beaded steel-plastic backboard all include an upper mold plate 006 located outside the viewing layer 21 of the steel-plastic backboard 20, a lower mold plate 009 located opposite to the upper mold plate 006 and outside the metal layer 23 of the steel-plastic backboard 20, an upper mold plate fixing device for fixing the upper mold plate 006, an upper spring 041 fixed in the upper mold plate fixing device and pressed against the upper mold plate 006, a lower mold plate fixing device for fixing the lower mold plate 009, and a lower spring 042 fixed in the lower mold plate fixing device, the lower template 009 is provided with a profiling groove structure 000, the profiling groove structure 000 is located below the steel-plastic back plate 20, and the thickness and shape of the profiling groove structure 000 are the same as those of the steel-plastic back plate 20.

Cope match-plate pattern fixing device includes: the upper die comprises an upper supporting plate 001 located above, a plurality of upper pad feet 002 fixed below the upper supporting plate 001, an upper die base 003 pressed by the plurality of upper pad feet 002, an upper pad plate 004 and an upper clamp plate 005 sequentially fixed below the upper die base 003, a stroke plate 018 fixed below the upper clamp plate 005, an upper stripper plate 007 fixed at two opposite ends or two sides of the upper clamp plate 005 and located on the side edge of the stroke plate 018, an upper outer limiting column 017 fixed below the upper die base 003 and located outside the upper stripper plate 007, a first fixing pin 019, a first inner guide column 020, a first screw 021 located between the first fixing pin 019 and the first inner guide column 020, a second screw 022, a third screw 023 and a first ejector pin 024 located below the third screw 023. Wherein the upper die plate 006 is positioned between the plurality of upper stripper plates 007 and below the stroke plate 018.

The first fixing pin 019 and the first screw 021 are fixedly connected to the upper die holder 003, the upper padding 004, the upper clamp plate 005, and the upper stripper plate 007 in sequence. A first inner guide pillar 020 and a second screw 022 are fixedly connected with an upper die holder 003, an upper backing plate 004, an upper clamping plate 005, a stroke plate 018 and an upper die plate 006; a third screw 023 is fixedly connected with the upper die holder 003 and the upper backing plate 004; the first ejector pin 024 is fixedly connected with an upper base plate 004, an upper clamping plate 005, a stroke plate 018 and an upper die plate 006; the first fixing pin 019, the first screw 021, the first inner guide post 020, the second screw 022, and the third screw 023 are sequentially disposed.

The upper spring 041 is located between the upper die holder 003, the upper pad 004 and the upper clamp 005, so that the upper die holder 003, the upper pad 004 and the upper clamp 005 have elasticity therebetween and act on the upper die plate 006.

The lower template fixing device comprises a lower supporting plate 013 positioned below, a plurality of lower padding feet 012 fixed on the lower supporting plate 013, a lower die base 011 supported by the plurality of lower padding feet 012, a lower padding plate 010 fixed above the lower die base 011 and supporting the lower die plate 009, a lower supporting plate 008 positioned at the side edge of the lower die plate 009, a lower outer limiting column 014 fixed above the lower die base 011 and positioned at the side edge of the lower padding plate 010, a second inner guide column 025, a fourth screw 026, a second fixing pin 027, a fifth screw 028, a third fixing pin 029, a fifth screw 030, a sixth screw 031, a second jacking pin 032 positioned on the sixth screw 031, a seventh screw 033, an inner limiting column 015 positioned in the lower supporting plate 008 and close to the lower outer limiting column 014, and a lower stripper plate insert 016, wherein part of the lower stripper plate insert 016 is positioned in the lower supporting plate 008 and arranged close to the inner limiting column 033; a seventh screw 033, a second inner guide post 025, a fourth screw 026, a second fixing pin 027, a fifth screw 028, a third fixing pin 029, a fifth screw 030, a sixth screw 031, a lower stripper insert 016 and an inner limit post 015 are sequentially arranged.

The lower die plate 009 is located on the lower backing plate 010 and supported at its side by the lower support plate 008.

A seventh screw 033 fixedly connects the lower die base 011 and the lower pad foot 012; the second inner guide post 025 and a fourth screw 026 are fixedly connected with the lower supporting plate 008, the lower cushion plate 010 and the lower die holder 011; the second fixing pin 027 and the fifth screw 028 are fixedly connected with the lower cushion plate 010 and the lower die seat 011; the lower die plate 009 and the lower bolster 010 are fixedly connected by a third fixing pin 029 and a fifth screw 030.

The lower spring 041 is arranged close to the lower outer limit column 014 and acts on the lower stripper plate 008, and the lower spring 041 is positioned between the lower die holder 011 and the lower bolster 010.

The first ejector pin 024 is ejected outside the surface layer 21 of the steel-plastic back plate 20, and the second ejector pin 032 is ejected outside the metal layer 23 of the steel-plastic back plate 20.

As shown in fig. 12, the first crimping steel-plastic back plate production mold further includes a shearing blade 401, the structure to be crimped 301 of step S1 is formed by the shearing blade 401, and the shearing blade 401 has a height of 0.25-0.35mm (preferably 0,30mm, specifically one material thickness) and a width of 0.45-0.55mm (preferably 0,50 mm). The profiling groove structure 000 is the same as the structure of the steel-plastic back plate 20 before being curled, the profiling groove structure 000 comprises a groove 402 positioned on the surface of the lower template 009 and a groove connecting structure 403 positioned between the groove 402 and the lower stripper plate 008, the depth of the groove 401 is the same as the thickness of the steel-plastic back plate 20, and the thick structure 201 of the steel-plastic back plate 20 is placed in the groove 401; the shear blade 401 is then located at the end of the groove connection 403. The steel-plastic back plate 20 is placed in the profiling groove structure 000 and is pressed and held by the upper template 006 and the lower template 009 to form the structure to be rolled 301.

As shown in fig. 13, after the steel-plastic back panel 20 is placed in the first flanged steel-plastic back panel production mold in the step S1, the steel-plastic back panel is taken out and placed in the second flanged steel-plastic back panel production mold in the step S2.

The production mould of backplate is moulded to second turn-up steel still includes: the bending gap 004 located between the lower template 009 and the lower stripper plate 008 and located at the end of the profile modeling groove structure 000, the avoiding structure 405 located at the side of the lower template 009 and communicated with the bending gap 004, and the solid structure 406 located at the edge of the groove 110 of the profile modeling groove structure 000, wherein the bending gap 004 is perpendicular to the profile modeling groove structure 000, and the thin body structure 202 located in the profile modeling groove structure 000 is pressed and held by the upper template 006 to form the bending structure 302.

The avoidance structure 405 is used to avoid the structure to be folded 301. The bending structure 302 of the steel-plastic backboard 20 is formed by utilizing the position of the solid structure 406, because the bending position is located at the edge of the interlayer 22 formed by the plastic material when the thin body structure 202 of the steel-plastic backboard 20 is bent, the plastic material cannot be pressed, the plastic material of the interlayer 22 is easily extruded by directly pressing and folding in the stamping process, and thus the bending is unstable, so that the solid structure 222 with a certain width needs to be reserved for assisting in bending to form the bending structure 302 during the design of the production mold of the second hemming steel-plastic backboard.

After the steel-plastic back plate 20 is placed in the second crimped steel-plastic back plate production mold to complete the step S2, the steel-plastic back plate is taken out and placed in the third crimped steel-plastic back plate production mold to perform the step S3.

As shown in fig. 7, the third production mold for the beaded steel-plastic back plate further includes a mold knife edge 114, the mold knife edge is used for performing side cutting processing on the remainder 113 at the corner of the bending structure 302, wherein the mold knife edge has a dovetail slider (not shown), and the dovetail slider plays a role in stripping the remainder; the side cutting is finished milling and forms a certain taper.

Because the material of the thin body structure 202 of the steel-plastic backboard 20 is VCM sheet material, aluminum material, stainless steel or other appearance materials, the thin body structure 202 forms excess material around the corner in the bending process of the bending structure 302, and the excess material may affect the overall beauty of the backboard, so it needs to be cut off.

By adopting the corner single side cutting (the process only carries out the side cutting and material shearing operation on the opposite angle needing to be curled on the product), the material width at the corner is in accordance with the material width which is just in accordance with a rolling circle after the stamping and integral curling forming is carried out in the step S4, the phenomenon that the curled edge cannot be formed due to the stacking generated when two sides are extruded is avoided, and the generation of cracks due to the less material is ensured.

After the steel-plastic back plate 20 is put into the production mold of the fourth curled steel-plastic back plate after the step S3 is completed in the production mold of the third curled steel-plastic back plate, the taken out steel-plastic back plate is put into the production mold of the fourth curled steel-plastic back plate to perform the step S4.

As shown in fig. 14, the fourth mold for producing a hemmed steel-plastic back plate further comprises a hemming groove 407 and a stripper pendulum block 408 connected to the lower die block 009 through a spring (not shown). The curling groove 407 is located below the structure to be curled 301, and the curling groove 407 is used for forming the double-folded bent structure 302 into the rolling structure 309 from bottom to top; after the curled steel-plastic back plate is formed by stamping, the stripping pendulum block 408 unloads the curled steel-plastic back plate from the lower module 009 of the fourth curled steel-plastic back plate production mold.

The material-removing swing block 408 has a profiling structure which is the same as the material bottom layer and the middle interlayer of the steel-plastic back plate, and the bottom is circular and movable, so that the material-removing effect is improved.

The utility model also provides a manufacturing approach of the production mould of backplate is moulded to turn-up steel, including following step:

as shown in fig. 11, a production mold for manufacturing a first flanged steel-plastic back plate with an upper mold plate 006 and a lower mold plate 009 is manufactured, and simultaneously, during the manufacturing process of the lower mold plate 009, a profiling groove structure 000 is formed on the surface of the lower mold plate 009, as shown in fig. 12, the profiling groove structure 000 comprises a groove 402 on the surface of the lower mold plate 009 and a groove connecting structure 403 between the groove 402 and a lower stripper plate 008, the depth of the groove 402 is the same as the thickness of the steel-plastic back plate 20, and a thick body structure 201 of the steel-plastic back plate 20 is placed in the groove 402; meanwhile, a shearing knife edge 401 is formed at the end part of the groove connecting structure 403, and the structure to be rolled 301 of the step S1 is formed through the shearing knife edge 401;

as shown in fig. 11, a production mold for manufacturing a second hemmed steel-plastic back plate with an upper mold plate 006, a lower mold plate 009 and a lower stripper plate 008 located at the side edge of the lower mold plate 009 is manufactured, meanwhile, in the manufacturing process of the lower mold plate 009, a bending gap 004 is formed between the lower mold plate 009 and the lower stripper plate 008, an avoiding structure 405 communicated with the bending gap 004 is formed at the side edge of the lower mold plate 009, and a solid structure 406 located at the edge of a groove 110 of a profile groove structure 000 is formed, and the bending gap 004 is arranged perpendicular to the profile groove structure 000; the thin body structure 202 is pressed in the bending gap 004 and forms a bending structure 302, the solid structure 406 assists in bending to form the bending structure 302, and the avoiding structure 405 is used for avoiding the shearing knife edge 401;

as shown in fig. 11, a production mold for manufacturing a third hemmed steel-plastic back plate with an upper mold plate 006, a lower mold plate 009 and a lower stripper plate 008 at the side of the lower mold plate 009 is shown in fig. 7, and a profiling groove structure 000 is formed on the surface of the lower mold plate 009 during the manufacturing process of the lower mold plate 009; meanwhile, a die knife edge 114 is arranged, and the die knife edge 114 is used for performing side cutting processing on the excess material 113 at the corner of the bending structure 302 formed in the step S2, wherein the die knife edge is provided with a dovetail slider (not shown), and the dovetail slider plays a role in stripping the excess material; side cutting is realized by adopting finish milling and forming a certain taper;

as shown in fig. 11, a production mold for manufacturing a fourth hemmed steel-plastic back plate with an upper mold plate 006, a lower mold plate 009 and a lower stripper plate 008 at the side edge of the lower mold plate 009 is shown in fig. 14, and a profiling groove structure 000 is formed at the surface of the lower mold plate 009 during the manufacturing process of the lower mold plate 009, wherein the profiling groove structure 000 comprises a groove 402 at the surface of the lower mold plate 009; meanwhile, a bending gap 004 is formed between the lower template 009 and the lower stripper plate 008; simultaneously forming a crimping groove 407 at the end of the bending gap 004 and a stripping swinging block 408 connected with the lower die plate 009 through a spring (not shown), wherein the crimping groove 407 is located below the structure to be crimped 301, and the crimping groove 407 is used for forming the rolled structure 309 from bottom to top for the double-bending structure 302; after the curled steel-plastic back plate is formed by stamping, the stripping pendulum block 408 unloads the curled steel-plastic back plate from the lower module 009 of the fourth curled steel-plastic back plate production mold.

The four dies of the curled steel-plastic backboard are formed by the method, and in the process of forming the whole stamping stroke of the curled steel-plastic backboard, due to the characteristics of the novel steel-plastic backboard, the lower templates of the four dies are required to be subjected to copying processing according to the height and thickness of materials to form a copying groove structure, and the lower template of the production die of the first curled steel-plastic backboard, the lower template of the production die of the second curled steel-plastic backboard, the lower template of the production die of the third curled steel-plastic backboard and the lower template of the production die of the fourth curled steel-plastic backboard are required to be subjected to copying processing according to the height difference; the third production die for the curled steel-plastic backboard adopts corner single side cutting (only the leftover material at the corner of the bending structure 302 formed in the step S2 is subjected to side cutting), so that the material width at the corner is consistent with the material width of the steel-plastic backboard which is subjected to stamping and integrated curling in the step S4 and just meets a curling circle, the phenomenon that the curled edge cannot be formed due to stacking materials generated during extrusion of two sides is avoided, and the generation of cracks due to less materials is ensured.

The above description is only a preferred embodiment of the present invention, and the present invention is not limited to the above description in any form, and although the present invention has been disclosed with reference to the preferred embodiment, it is not limited to the present invention, and any skilled person in the art can make modifications or changes equivalent to the equivalent embodiment of the above embodiments without departing from the scope of the present invention.

Claims (8)

1. The hemming steel-plastic back plate for the display is characterized by comprising a thick body structure and a thin body structure positioned on the periphery of the thick body structure; the steel-plastic back plate also comprises a forming structure formed by bending and/or curling the thin body structure.

2. A beaded steel-plastic backsheet according to claim 1, wherein: the forming structure comprises a bending structure bent by a thin body structure and a roll body structure positioned at the end part of the bending structure.

3. A beaded steel-plastic backsheet according to claim 1, wherein: the forming structure comprises a bending structure which is bent by a thin body structure.

4. A beaded steel-plastic backsheet according to claim 1, wherein: the forming structure comprises a roll structure formed by curling or rolling a thin-body structure.

5. A beaded steel-plastic backsheet according to claim 1, wherein: the steel-plastic back plate comprises a surface observing layer, an interlayer and a metal layer, wherein the surface observing layer is positioned on the outer side, the interlayer is positioned on the surface observing layer, the metal layer is positioned on the interlayer, the length and the width of the surface observing layer are both larger than those of the interlayer and the metal layer, the length and the width of the interlayer and the metal layer are the same, and the thin body structure is a side edge which is extended out from the surface observing layer and is positioned on the interlayer and the metal layer.

6. A beaded steel-plastic backsheet according to claim 5, wherein: the material of the surface layer is VCM plate or aluminum material or stainless steel.

7. A beaded steel-plastic backsheet according to claim 5, wherein: the sandwich layer is made of ABS, or PC, or ABS + PC or PP honeycomb plate.

8. A beaded steel-plastic backsheet according to claim 5, wherein: the metal layer is made of aluminum or stainless steel.

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