Method for Producing Surrounding Connection of Heat-insulating Protecting Component

Abstract

An assembly of dies for producing W-shaped flanges of a heat-insulating protective component and a method of producing the same by using the assembly of dies. The assembly of dies comprises a terrace-forming die and a bending die. The method comprises only two procedures, namely, stamping a composite base plate into a terraced composite base plate by using a terrace-forming die, and bending and compressing the two terraced sides of the terraced composite base plate by using a bending die so that each of the two terraced sides forms a W-shaped flange.

What is claimed is: 
     
         1 . An assembly of dies for producing W-shaped flanges of a heat-insulating protective component comprising a terrace-forming die and a bending die, wherein the terrace-forming die comprises an upper mould (D 10 ), an upper mould left cutting edge (D 11 ), an upper mould right cutting edge (D 15 ), first to sixth upper mould inner terrace sides (D 12 , D 13 , D 14 , D 16 , D 17  and D 18 ), a lower mould (D 20 ), a lower mould left cutting edge (D 21 ), a lower mould right cutting edge (D 25 ) and first to sixth lower mould inner terrace sides (D 22 , D 23 , D 24 , D 26 , D 27  and D 28 ); when the terrace-forming die reaches a closed position, gaps exist between the upper mould left cutting edge (D 11 ) and the lower mould left cutting edge (D 21 ) and between the lower mould right cutting edge (D 15 ) and the lower mould right cutting edge (D 25 ) respectively; also when the terrace-forming die reaches a closed position, a space formed between the first to sixth upper mould inner terrace sides and the corresponding first to sixth lower mould inner terrace sides is wider than thickness of materials being fed;
 the bending die comprises a bending die upper mould (D 30 ) and a bending die lower mould (D 40 ), wherein the bending die upper mould (D 30 ) comprises a left side surface (D 32 ) and a right side surface (D 34 ) both perpendicular to a bottom surface (D 35 ) of the bending die upper mould (D 30 ), and also comprises a left arc surface (D 31 ) and a right arc surface (D 33 ) joined to the left side surface (D 32 ) and the right side surface (D 34 ) respectively; the left arc surface and the right arc surface are arced surfaces oriented towards two corresponding outer sides of the bending die upper mould. 
 
     
     
         2 . A method for producing the W-shaped flanges of the heat-insulating protective component by using the assembly of dies as in  claim 1 , wherein the method comprises the following steps:
 preparing layers of materials in accordance with required outer shapes, measurements and predetermined requirements for each layer; fixing the layers of materials together by tools to form a composite base plate;   disposing the composite base plate at a terrace-forming die to stamp it into a terraced composite base plate;   disposing the terraced composited base plate as formed on a bending die lower mould (D 40 ); moving a bending die upper mould (D 30 ) towards the bending die lower mould (D 40 ); imposing obstruction forces laterally to two sides of the terraced composite base plate by making use of a left arc surface (D 31 ) and a right arc surface (D 33 ) of the bending die upper mould (D 30 ) so that the two sides of the terraced composite base plate bend inwardly towards the terraced composite base plate; continuing moving the bending die upper mould (D 30 ) downwardly towards the bending die lower mould (D 40 ); imposing vertical compression against the two sides of the terraced composite base plate by making use of a bottom surface (D 35 ) of the bending die upper mould (D 30 ) so that the two sides of the terraced composite base plate in a terraced shape are each stamped as a W-shaped flange.   
     
     
         3 . The method as in  claim 2 , wherein the heat-insulating protective component made of metal comprises an upper metal base plate, a lower metal base plate and heat-insulating material between the upper metal base plate and the lower metal base plate.