Patent ID: 6231944
Filing Date: 2001-05-15
Classification: B21D,B32B,B60R,G10K,Y10T

Abstract:
A method for producing a thermal, acoustical and/or vibrational abatement shield (1), comprising:(1) providing an upper metal foil (2);(2) providing a lower metal foil (3);(3) placing a thermal, acoustical and/or vibrational abatement insulation (4) between the upper and lower foils (2, 3) such that an upper periphery (5) of the upper foil (2) and a lower periphery (6) of the lower foil (3) are in vertical juxtaposition and totally enclose the insulation;(4) placing at least a portion (30) of said peripheries (5, 6) in a die (40) having an upper die anvil (41) and a lower die punch (42) movable within a die cavity (43);(5) moving the lower die punch (42) upwardly in the die cavity (43) toward the die anvil (41) disposed in the die cavity (43) to form a punched section (7) of the peripheries (5, 6) in the die cavity (43) where the punched section (7) has vertical walls (45, 46) next to walls of the die cavity (43) and a horizontal wall (47) next to the die anvil (41), and a height (H) of the punched section (7) is at least 7 times a combined thickness of the upper and lower foils (2, 3);(6) retracting the lower die punch (42) from the die cavity (43) to a position where the lower die punch (42) supports the vertical walls (45, 46) of the punched section (7);(7) moving the die anvil (41) downwardly in the die cavity (43) and in contact with the horizontal wall (47) of the punched section (7) so as to cause the vertical walls (45, 46) of the punched section (7) to compressively collapse inwardly near a horizontal centerline (50) of the punched section (7) and into the die cavity (43); and(8) continuing the movement of the die anvil (41) downwardly to compressively collapse the vertical walls (45, 46) inwardly until: (a) the upper foil (2) of the punched section (7) is in an upper S-shaped configuration at each side thereof with upper laterally-extending walls (31) of the S-shaped configurations; (b) the lower foil (3) of the punched section (7) is in a lower S-shaped configuration at each side thereof with lower laterally-extending walls (33) of the S-shaped configurations; (c) the upper S-shaped configurations totally encloses the lower S-shaped configurations; and (d) the upper laterally-extending walls (31) compressively contact the lower laterally-extending walls (33).