摘要:
Apparatus for applying heat to a patch on a composite structure repair site is disclosed. The apparatus includes a sealed bladder containing both a thermally conductive fluid and a heating element in thermal contact with the fluid. The heating element which comprises a flexible sheet having an electrical resistance wire uniformly placed thereon can be immersed in the fluid or otherwise in direct thermal contact therewith. Electrical power is applied to the heating element by conductors passing through the bladder surface. The heating element of disclosed structure can be attached to seal the bladder interior into two reservoirs, to permit fluid flow throughout the bladder or to form at least one outer surface of the bladder. Flexible supports can also be attached from the heating element to an interior bladder surface to maintain spacing between the heating element and the surface. To prevent diffusion of the thermally conductive fluid, a separate container of thermally conductive fluid impermeable material can be placed inside the bladder. The outer bladder may be sealed by mechanical frame apparatus which compresses the bladder surface material at a perimeter thereof.
摘要:
Apparatus for forming conduit having a plurality of longitudinally extending passageways disposed adjacent each other within an exterior wall, the passageways having at least a portion of their interior walls in common with adjacent passageways. The apparatus is characterized by blender and extruder having a hopper, plasticizer and die that includes a plurality of pins with at least one completely surrounded by others, and, in specific embodiments, stingers for supporting and preventing distortion of the pliable walls of hot extrudate until cooled sufficiently; cooling, sizing and vacuum chamber for cooling and sizing and including a support for the exterior wall; and pullers, track, and cutting saws.