摘要:
A process is provided for the manufacture of simulated wooden channel, or box, beams. The beams manufactured in accordance with the process of the invention may be composed, for example, entirely of polyurethane plastic; or they may be constructed to consist of a polystyrene or honeycomb paper inner core with a continuous molded thin skin of polyurethane. The channel beam provided in accordance with the process of the invention has a hollow rectangular cross-section, and it has relatively thin side and bottom walls, so as to be light and inexpensive. It may be constructed to exhibit low flame spread and low smoke development. The channel beam fabricated by the process of the invention may be conveniently mounted on the ceiling or walls of a room by use of anchor or support blocks, the blocks being adhesively attached to the ceiling or wall, as the case may be, and the beam being adhesively attached to the anchor block.
摘要:
Sinterable materials are employed in preparing regular honeycomb structures by preparing a sheet of a sinterable material and a resin binder, normally by coating a porous carrier with a light first coating of a composition containing a sinterable material and a resin binder. Node bonds are printed onto the sheet and the sheets are then stacked with the node bonds in appropriate spatial relationship. The stack is cured and the sheets are expanded in a warm aqueous environment to provide a green stock of honeycomb structure. The green stock is coated with additional coats of sinterable material and resin binder. The resulting honeycomb structure is then fired to provide a stable, highly uniform, expanded honeycomb structure of excellent strength and uniformity.
摘要:
A METHOD AND APPARATUS FOR CONSTRUCTING HONEYCOMB FROM A FABRIC WHICH TENDS TO DISTORT UNDER ITS OWN WEIGHT. THE FABRIC IS IMPREGNATED WITH A SLIGHT AMOUNT OF A RESIN IMPREGNATION MATERIAL TO GIVE IT SUFFICIENT BODY, PREVENTING ITS DISTORTION WHILE ALLOWING IT TO BE FLEXIBLY DEFORMED DURING EXPANSION OF THE HONEYCOMB. AFTER THE IMPREGNATION OF THE FABRIC, ADHESIVE LINES ARE APPLIED THERETO. STRIPS OF THE FABRIC ARE THEN STACKED AND SUBJECTED TO HEAT TO CURE THE ADHESIVE AND THE STACKS ARE EXPANDED TO GIVE THEM THE HONEYCOMB CONFIGURATION. THEREAFTER THE IMPREGNATION MATERIAL AND ADHESIVES ARE FURTHER CURED AND COATED TO RIGIDIFY THE STRUCTURE.
摘要:
An energy absorber wherein a tubular honeycomb member having a conically tapered end is collapsed by an anvil. The anvil has a concavity to accommodate the collapsed conically tapered end of the tubular honeycomb member and compresses the honeycomb energy absorbent member along a wave front which is substantially normal to the direction of honeycomb collapse.
摘要:
AROMATIC DICARC AS AQUEOUS RUST INHIBITORS OR TEMPERATRUE CONTROLLED CURING OR CROSS-LINKING AGENTS FOR POLYMERS HAVING AMINE REACTIVE FUNCTIONALITIES, E.G. EPOXY RESINS AND POLYISOCYAMATE RESINS.
摘要:
A METHOD OF FILLING HONEYCOMB CORES WITH THIN FIBERS BY PLACING THE EXPANDED CORE IN A HOLDING FIXTURE, PLACING A MAT OF RELATIVELY BRITTLE FIBERS ON TOP OF THE CORE AND RECIPROCATING AT LEAST ONE ROLLER ACROSS THE MAT UNTIL THE FIBERS ARE SEVERED ALONG CORE CELL WALLS AND HAVE BEEN MOVED INTO THE CELLS. ADHESIVE OR RESINOUS MATERIALS ARE APPLIED TO THE CORE AND/OR THE FIBERS RO RETAIN THE FIBERS IN THE CELLS DURING HANDLING OF THE FILLED CORE.
摘要:
A pack of honeycomb core material which is expandable to a nonplaner contour, the pack including a plurality of ribbons having undulating corrugations providing alternate zenith and nadir points, selected areas intermediate the zenith and nadir points being bonded to each other whereby the pack may be expanded to form a plurality of multiangular hollow cells.
摘要:
A MILLING MACHINE FOR SHAPING CONTOURED AIRFOIL CORES AND THE LIKE WHICH HAS A ROTARY CUTTER RECIPROCAL IN A FIRST DIRECTION AND MOVABLE IN A SECOND, TRANSVERSE DIRECTION IN INCREMENTAL STEPS. SPACED APART CAM PLATES ENGAGE CAM FOLLOWERS WHICH OPERATE A CONTROL AND POSITIONING DEVICE WHICH IN TURN CONTINUOUSLY ADJUSTS THE ANGULAR INCLINATION OF THE ROTARY TOOL AXIS DURING EACH RECIPROCATING MOVEMENT OF THE TOOL TO MAINTAIN THE CUTTING PLANE OF THE TOOL TANGENT TO THE CONTOURED CORE SURFACE. THE TOOL IS MOUNTED TO A MILLING HEAD SUPPORT STRUCTURE THAT IS TAPERED AWAY FROM THE CORE TO PREVENT AN INTERFERENCE BETWEEN STEEPLY ANDGLED CORE SURFACES AND THE SUPPORT STRUCTURE AND WHICH IS FURTHER CONSTRUCTED TO PERMIT PIVOTAL MOVEMENT OF THE ROTARY TOOL AXIS ABOUT ITS CUTTING POINT THROUGH AN ARC OF 90*.