Metal working – Method of mechanical manufacture – Obtaining plural product pieces from unitary workpiece
Patent
1976-08-10
1980-03-25
Hoag, W. E.
Metal working
Method of mechanical manufacture
Obtaining plural product pieces from unitary workpiece
29412, 294321, 29458, 29509, 156 79, 156148, 264 459, 264 463, 264 465, 264 466, 264 467, 264103, 264165, 264257, 264267, B23P 1700, B29C 1714, B29D 2704
Patent
active
041942809
ABSTRACT:
Machines and process for making in a continuous operation a prestressed glass reinforced, thermally insulating panel, structurally stiff, and totally impervious, of indefinite length and with a cross-section shaped as an elongated parallelogram.
Steps for manufacture include making the surface of the panel out of a tubular envelope of knitted or woven glass fabric, stretched over a special holding frame, to give it the desired parallelogram shape. Fastened by a continuous knitting process to the opposite faces of the glass fabric envelope, other glass fibers are stretched inside the envelope and arranged according to three principal directions, all of them oblique with respect to the panel faces. The glass fabric envelope is then coated with a plastic resin to make it impervious to gas and covered on one face at least with a metal liner. This liner, made of cryogenic alloy, has its edges upturned and folded, so as to be fastened to the glass reinforced plastic envelope. Finally, the envelope is filled with a foamed-in-place thermal insulation, which, in expanding, surrounds each of the reinforcing glass fibers locked and held in a stretched position. Consequently, when released from the holding frame, after the foam has hardened, the relaxed tension of glass reinforcing fibers applies a compressive stress to the foam, directed normally to the panel faces. The oblique disposition of the reinforcing fibers is achieved by 4 knitting machines located in 4 non parallel spatial planes. The finished panels are used for constructing cryogenic tanks in LNG ships.
REFERENCES:
patent: 3374132 (1968-03-01), Boggs
patent: 3537929 (1970-11-01), Keith et al.
patent: 3592884 (1971-07-01), Williams
patent: 3986918 (1976-10-01), Berner
LandOfFree
Process for the manufacture of rigid and impervious insulating p does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Process for the manufacture of rigid and impervious insulating p, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process for the manufacture of rigid and impervious insulating p will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1396095