| 摘要 |
<p>A method for making an internally reinforced tube (10-10) for use in manufacturing bicycle frames of the tube and lug type. The method includes providing a plurality of heat expandable mandrels (80-1) having shapes related to the desired configuration of the internal reinforcing structure of the tube (10-10); individually wrapping said mandrels (80-1) with a heat curable composite material (82-1 - 82-6); packing the wrapped mandrels (53-10) into a multi-part body (55-10); overwrapping the multi-part body with heat curable composite material (54-10); and curing the overwrapped body (60) until all parts of the composite material are cured. After curing and cooling, the mandrels (80-1) are removed from the cured body to yield a composite tube (10-10) having an integrally formed internal reinforcing structure (12-10).</p> |
