Method and apparatus for installing aft insulation in rocket motor case

An apparatus for installing an insulation rubber loop to the aft end of a rocket motor case, wherein said insulation rubber loop is attached to an inner wall of sad rocket motor case, said apparatus comprising:

• a cover to be fastened to an opening of the aft end of the rocket motor case;
• a first metal block movably joined with said cover and provided with a conical portion having a small end and a large end, with said small end being located in proximity of said cover, wherein said first metal block is able to be driven such that said small end to move vertically toward or away from said cover;
• and
• a heat-resistant rubber loop corresponding in shape to the insulation rubber loop and having a conical inner edge corresponding in shape to said conical portion of said first metal block, said conical inner edge of said heat-resistant rubber loop being located on said conical portion of said first metal block, said heat-resistant rubber loop having an outer edge in an intimate contact with the insulation rubber loop at such time when said first metal block is located in the rocket motor case and when said cover is fastened to the opening of the aft end of the rocket motor case, the insulation rubber loop being pressed against said inner wall of sad rocket motor case by said heat-resistant rubber loop such that the insulation rubber loop is securely attached to the inner wall of the aft end of the rocket motor case at such time when said first metal block is driven to move toward said cover;
• wherein said heat-resistant rubber loop and said first metal block are able to taken out of the rocket motor case from the opening of the aft end of the rocket motor case by being put through the insulation rubber loop at the time when said first metal block is driven to move away from said cover and in the wake of said cover being separated from the opening of the aft end of the rocket motor case.