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CN-122008636-A - Metal composite plate

CN122008636ACN 122008636 ACN122008636 ACN 122008636ACN-122008636-A

Abstract

The invention provides a metal composite board which is suitable for being punched and bent to form a shell. The metal composite board comprises a metal layer, an adhesive layer and an appearance decorative layer. The metal layer is provided with a first surface, a second surface opposite to the first surface and a groove recessed in the first surface. And the adhesive layer is covered on the second surface. The appearance decorative layer is covered on the adhesive layer and is attached to the metal layer through the adhesive layer. The shell formed by punching and bending the metal composite plate is provided with a bending guide angle, and the bending guide angle comprises a bending external angle and a bending internal angle. The bending external angle is provided with a positive drawing angle or a negative drawing angle, and the groove falls at the bending internal angle.

Inventors

  • LIU ZHIHUA
  • WU RONGQIN
  • HUANG HANQING
  • CHEN YONGHUI

Assignees

  • 仁宝电脑工业股份有限公司

Dates

Publication Date
20260512
Application Date
20250605
Priority Date
20241110

Claims (16)

  1. 1. A metal composite board adapted to be bent by stamping to form a housing, said metal composite board comprising: a metal layer having a first surface, a second surface opposite to the first surface, and a groove recessed in the first surface; an adhesive layer covering the second surface, and The appearance decorative layer is covered on the adhesive layer and is attached to the metal layer through the adhesive layer, Wherein the shell formed by punching and bending the metal composite plate is provided with a bending guide angle, the bending guide angle comprises a bending external angle and a bending internal angle, a positive drawing die angle is formed at the bending external angle, the groove is positioned at the bending internal angle, The radius of the bending external angle is R1, the angle of the positive drawing die angle is A1, the arc length of the bending external angle is AL1, Wherein AL1 = (90 ° - |a1|) ×pi×r1++180°.
  2. 2. The metal composite panel according to claim 1, wherein the width of the groove is W1, and W1 is not less than 0.9 x AL1.
  3. 3. The metal composite panel according to claim 1, wherein 0 ° is equal to or less than a1 is equal to or less than 30 °.
  4. 4. The metal composite panel according to claim 1, wherein the metal layer has a thickness of T1 and the groove has a depth of D1, and a distance between the bottom of the groove and the second surface is T2, wherein t2= (T1-D1) and R1 is equal to or greater than T2.
  5. 5. The metal composite board according to claim 4, wherein the radius of the bent inner angle is R2, and R2 is not less than 0.1×T2.
  6. 6. The metal composite panel of claim 1, wherein the appearance decorative layer comprises a color layer covering the adhesive layer and a grain layer covering the color layer, and the color layer is located between the grain layer and the adhesive layer.
  7. 7. The metal composite plate according to claim 1, wherein after the metal composite plate is punched and bent to form the casing, a reinforcing layer is formed on the first surface, and the reinforcing layer covers the first surface and is embedded into the groove.
  8. 8. The metal composite panel of claim 1, wherein the bend relief angle is a bend fillet.
  9. 9. A metal composite board adapted to be bent by stamping to form a housing, said metal composite board comprising: a metal layer having a first surface, a second surface opposite to the first surface, and a groove recessed in the first surface; an adhesive layer covering the second surface, and The appearance decorative layer is covered on the adhesive layer and is attached to the metal layer through the adhesive layer, Wherein the shell formed by punching and bending the metal composite plate is provided with a bending guide angle, the bending guide angle comprises a bending external angle and a bending internal angle, a negative drawing die angle is formed at the bending external angle, the groove is positioned at the bending internal angle, The radius of the bending external angle is R11, the angle of the negative draft angle is A11, the arc length of the bending external angle is AL11, Wherein, the aL11= (90 DEG) ++ A11| x pi x R11 ≡180°.
  10. 10. The metal composite panel of claim 9, wherein the groove has a width W1, and W1 is greater than or equal to 0.9 x AL11.
  11. 11. The metal composite panel of claim 9, wherein-30 ° is less than or equal to a11 is less than or equal to 0 °.
  12. 12. The metal composite panel according to claim 9, wherein the metal layer has a thickness of T1 and the groove has a depth of D1, the distance between the bottom of the groove and the second surface is T2, wherein t2= (T1-D1) and R11 is equal to or greater than T2.
  13. 13. The metal composite panel according to claim 12, wherein the radius of the bent inner angle is R21, and R21 is equal to or greater than 0.1 x T2.
  14. 14. The metal composite panel of claim 9, wherein the appearance decorative layer comprises a color layer overlying the adhesive layer and a grain layer overlying the color layer, and wherein the color layer is located between the grain layer and the adhesive layer.
  15. 15. The metal composite plate according to claim 9, wherein after the metal composite plate is punched and bent to form the casing, a reinforcing layer is formed on the first surface, and the reinforcing layer covers the first surface and is embedded into the groove.
  16. 16. The metal composite panel of claim 9, wherein the bend relief angle is a bend fillet.

Description

Metal composite plate Technical Field The invention relates to a plate, in particular to a metal composite plate. Background Metal cases commonly used in electronic products are usually made of metal plates by stamping and bending. In the stamping and bending process, cracks are generated due to overlarge stress born by bending parts possibly caused by insufficient ductility, improper bending radius or direction design or overlarge stamping speed of materials, and the cracks not only cause appearance flaws of the shell, but also can cause interlayer stripping between the metal layer and the decorative layer, and even weaken the structural strength and durability of the shell. Disclosure of Invention The invention aims at a metal composite board which is beneficial to improving the appearance quality, the structural reliability and the structural strength of the manufactured shell. According to an embodiment of the invention, the metal composite plate is suitable for being punched and bent to form the shell. The metal composite board comprises a metal layer, an adhesive layer and an appearance decorative layer. The metal layer is provided with a first surface, a second surface opposite to the first surface and a groove recessed in the first surface. And the adhesive layer is covered on the second surface. The appearance decorative layer is covered on the adhesive layer and is attached to the metal layer through the adhesive layer. The shell formed by punching and bending the metal composite plate is provided with a bending guide angle, and the bending guide angle comprises a bending external angle and a bending internal angle. The bending external corner is provided with a positive drawing die angle, and the groove falls at the bending internal corner. The radius of the bending external angle is R1, and the angle of the positive draft angle is A1. The arc length of the bent outer angle is AL1, and al1= (90 ° - |a1|) ×pi×r1++180°. In an embodiment of the invention, the width of the groove is W1, and W1 is greater than or equal to 0.9xAL 1. In one embodiment according to the invention, 0≤A1≤30℃as described above. In an embodiment of the invention, a thickness of the metal layer is T1, and a depth of the groove is D1. The distance between the bottom of the groove and the second surface is T2, wherein T2= (T1-D1), and R1 is more than or equal to T2. In an embodiment of the invention, a radius of the bending inner angle is R2, and R2 is greater than or equal to 0.1×t2. In an embodiment of the invention, the appearance decoration layer includes a color layer covering the adhesive layer and a texture layer covering the color layer, and the color layer is located between the texture layer and the adhesive layer. In an embodiment of the invention, after the metal composite plate is punched and bent to form the chassis, a reinforcing layer is formed on the first surface. The reinforcement layer covers the first surface and is embedded into the groove. In an embodiment of the invention, the bending guide angle is a bending rounded angle. According to another embodiment of the invention, the metal composite plate is suitable for being punched and bent to form the shell. The metal composite board comprises a metal layer, an adhesive layer and an appearance decorative layer. The metal layer is provided with a first surface, a second surface opposite to the first surface and a groove recessed in the first surface. And the adhesive layer is covered on the second surface. The appearance decorative layer is covered on the adhesive layer and is attached to the metal layer through the adhesive layer. The shell formed by punching and bending the metal composite plate is provided with a bending guide angle, and the bending guide angle comprises a bending external angle and a bending internal angle. Negative drawing angles are formed at the outer corners of the bending, and the grooves fall at the inner corners of the bending. The radius of the bending external angle is R11, and the angle of the negative draft angle is A11. The arc length of the bent outer angle is AL11, and al11= (90+|a11|) ×pi×r11++180°. In another embodiment of the present invention, the width of the groove is W1, and W1 is greater than or equal to 0.9xAL 11. In another embodiment according to the invention, A11 is equal to or less than-30 DEG and equal to or less than 0 DEG as described above. In another embodiment of the present invention, the thickness of the metal layer is T1, and the depth of the groove is D1. The distance between the bottom of the groove and the second surface is T2, wherein T2= (T1-D1), and R11 is more than or equal to T2. In another embodiment of the present invention, the radius of the bending inner angle is R21, and R21 is equal to or greater than 0.1×T2. Based on the above, the metal composite board is provided with the grooves in the metal layer, so that the ductility of the bending part is improved through the grooves when the meta