초록 ▼

A process for producing low-density composite components as disclosed herein involves forming a compacted and curable pre-preg into a selected level of compaction whereby voids are capable of forming in the compacted cuable pre-preg. The compacted curable pre-preg is then cured at a pressure suffici

A process for producing low-density composite components as disclosed herein involves forming a compacted and curable pre-preg into a selected level of compaction whereby voids are capable of forming in the compacted cuable pre-preg. The compacted curable pre-preg is then cured at a pressure sufficiently low to permit evolving gases to form voids in the pre-preg as the pre-preg cures into the composite article. The pre-preg is only partially debulked in the process. Rocket nozzle components can be produced with reduced densities while still exhibiting satisfactory erosion and other characteristics desired for products subject to the harsh erosive environment of a rocket motor.

대표청구항 ▼

A process for producing low-density composite components as disclosed herein involves forming a compacted and curable pre-preg into a selected level of compaction whereby voids are capable of forming in the compacted cuable pre-preg. The compacted curable pre-preg is then cured at a pressure suffici

A process for producing low-density composite components as disclosed herein involves forming a compacted and curable pre-preg into a selected level of compaction whereby voids are capable of forming in the compacted cuable pre-preg. The compacted curable pre-preg is then cured at a pressure sufficiently low to permit evolving gases to form voids in the pre-preg as the pre-preg cures into the composite article. The pre-preg is only partially debulked in the process. Rocket nozzle components can be produced with reduced densities while still exhibiting satisfactory erosion and other characteristics desired for products subject to the harsh erosive environment of a rocket motor. 1 wherein the support members extend perpendicularly to the lower surface of the base plate. 15. A method of using a device which is stand-alone with respect to components of a mammographic machine for stabilizing the breast during a medical procedure, the method comprising the steps of: providing a base plate secured to support members; providing a column that is secured between and in contact with two of the support members and that extends vertically beyond the base plate; providing a pressure plate that slidably cooperates with the column above and parallel to the base plate and that has an aperture with internal beveled walls; providing a frictional engagement device for releasably gripping the column when the pressure plate is properly adjusted relative to the base plate and that is attachable to the pressure plate; placing a breast on the base plate; and manipulating the frictional engagement device to lower or raise the pressure plate along the column towards or away from the base plate enabling the pressure plate to contact and securely hold the breast between the pressure plate and the base plate. 16. The method of claim 15 comprising the additional step of applying an ultrasound transducer and another medical instrument within the aperture.