The first object to be 3D printed in space is a small panel labeled printer manufacturer with the words Made In Space. This is a milestone and a valuable source of feedback for NASA's adjustment of printer output. For example, NASA now knows that in a microgravity environment, parts are more sticky than printed on the earth, which may be caused by a different layer of plastic in the ISS's plastic space.

It will take some time for significant advances in space 3D printing technology. More objects will be printed in 3D, but will not return to Earth for research until the beginning of 2015. The golden age of printing from space is still early.

Despite this, NASA hopes to print spare parts on the spacecraft in 3D to prevent staff from making mistakes by carrying too much extra material into space.

Pipe cap, also known as the head, plug, LIDS, pipe cap, cocks, welding on the pipe end or installed outside the pipe thread to cover wall pipe fittings.Use closed pipeline, function the same as the tube wall.Pipe cap including convex cap, conical shell, variable diameter section, the design of the flat cover and tighten.From the standpoint of stress, convex cap in the gradually from hemispherical tube cap is not good, but look from the manufacturing difficulty, good manufacture gradually.Stitching distance requirements, for more than 3 g, and not less than 100 mm (welding heat affected zone is high stress zone, and in the region will be a loss. The chemical composition of the final forming of welding seam detection level, scale and equipment shell, high waste.
Closure phase in the form of close, only the Blind Flange can be sealed, sealing, and welded tube cap is not detachable.Pipe cap including convex cap, conical shell, variable diameter section, the design of the flat cover and tighten.
Convex tube caps include: hemispherical tube cap, oval tube caps, disc pipe cap and QiuGuanXing cap.From the standpoint of stress, convex cap in the gradually from hemispherical tube cap is not good, but look from the manufacturing difficulty, good manufacture gradually.

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