Method and device for manufacturing cover including multiple metal layers

Abstract

A method and a device for manufacturing a cover including multiple metal layers are provided. The method includes: injecting a second metal in liquid form which is a metal different from a first metal layer onto a semi-finished cover disposed in a mold and formed of the first metal layer, so as to form a second metal layer on the first metal layer; and pressing the second metal layer with a pressure in the mold. Not only does the multi-layer metal cover manufactured according to the method have the strength and elasticity of a composite metal, but also subsequent surface treatment may be performed on the metal cover as required, such as anodizing surface treatment, and corrosion resistant treatment, to further improve the adhesiveness between metal layers, the strength and the corrosion resistance, and make the design of the cover more flexible.

1 . A method for manufacturing a cover comprising multiple metal layers, comprising:
 injecting a second metal in liquid form which is a metal different from a first metal layer, onto a semi-finished cover which is disposed in a mold and formed of the first metal layer, so as to form a second metal layer on the first metal layer; and   pressing the second metal layer with a pressure in the mold.   
     
     
         2 . The method according to  claim 1 , wherein the materials of the first metal layer and the second metal layer comprise stainless steel, zinc, aluminum, magnesium, chromium, titanium, copper, beryllium, nickel or an alloy thereof. 
     
     
         3 . A device for manufacturing a cover comprising multiple metal layers, comprising:
 a mold, used for injecting a second metal in liquid form which is a metal different from a first metal layer onto a semi-finished cover disposed in the mold and formed of the first metal layer, so as to form a second metal layer on the first metal layer,   wherein the mold comprises a pressing component, for applying a pressure to the second metal layer located in the mold.   
     
     
         4 . The device according to  claim 3 , wherein the mold comprises an overflow port, so that a surplus of the second metal in liquid form overflows through the overflow port when the pressing component presses the second metal layer. 
     
     
         5 . The device according to  claim 3 , wherein the mold comprises a rear mold, and a reserved space provided between the rear mold and the pressing component, so that the second metal in liquid form is injected into the reserved space. 
     
     
         6 . The device according to  claim 3 , wherein the materials of the first metal layer and the second metal layer comprise stainless steel, zinc, aluminum, magnesium, chromium, titanium, copper, beryllium, nickel or an alloy thereof. 
     
     
         7 . A method for manufacturing a cover comprising multiple metal layers, comprising:
 injecting a first metal in liquid form into a space between a first front mold and a rear mold operating in cooperation with the first front mold, so as to form a first metal layer; and   injecting a second metal in liquid form onto the first metal layer in a semi-solid molten state in a second front mold in cooperation with the rear mold, so as to form a second metal layer on the first metal layer.   
     
     
         8 . The method according to  claim 7 , further comprising:
 pressing the second metal layer with a pressure.   
     
     
         9 . The method according to  claim 7 , further comprising: relatively moving the rear mold between the first front mold and the second front mold. 
     
     
         10 . The method according to  claim 7 , wherein the materials of the first metal layer and the second metal layer comprise stainless steel, zinc, aluminum, magnesium, chromium, titanium, copper, beryllium, nickel or an alloy thereof. 
     
     
         11 . A device for manufacturing a cover comprising multiple metal layers, comprising:
 a first front mold, operating in cooperation with a rear mold and used to inject a first metal in liquid form, so as to form a first metal layer; and   a second front mold, operating in cooperation with the rear mold and used to inject a second metal in liquid form onto the first metal layer in a semi-solid molten state, so as to form a second metal layer on the first metal layer.   
     
     
         12 . The device according to  claim 11 , wherein the second front mold further comprises a pressing component, for applying a pressure to the second metal layer. 
     
     
         13 . The device according to  claim 12 , wherein a reserved space is provided between the rear mold and the pressing component, so that the second metal in liquid form is injected into the reserved space, and the rear mold further comprises an overflow port, so that a surplus of the second metal in liquid form overflows through the overflow port when the pressing component presses the second metal layer. 
     
     
         14 . The device according to  claim 11 , further comprising: a movement component, for relatively moving the rear mold between the first front mold and the second front mold. 
     
     
         15 . The device according to  claim 11 , wherein the materials of the first metal layer and the second metal layer comprise stainless steel, zinc, aluminum, magnesium, chromium, titanium, copper, beryllium, nickel or an alloy thereof.