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Angle bead, a projecting wood moulding at the corner of a plastered wall [4] Corner bead is similar, [4] but is usually fully embedded in plaster or drywall, and usually plastic or metal; Nosing bead, the rounded projection of a stair tread over the riser below [4] Parting bead, or parting strip, the feature that separates two sashes in a sash ...
Patterns used in sand casting may be made of wood, metal, plastics or other materials. Patterns are made to exacting standards of construction, so that they can last for a reasonable length of time, according to the quality grade of the pattern being built, and so that they will repeatably provide a dimensionally acceptable casting. [3]
It can leave an inset panel free to expand or contract with temperature and humidity. Cable moulding or ropework: Convex moulding carved in imitation of a twisted rope or cord, and used for decorative mouldings of the Romanesque style in England, France and Spain and adapted for 18th-century silver and furniture design (Thomas Sheraton) [4] [5]
If the volume is large, then the pattern can be mass-produced by a process similar to injection molding. Pre-expanded beads of polystyrene are injected into a preheated aluminum mold at low pressure. Steam is then applied to the polystyrene which causes it to expand more to fill the die. The final pattern is approximately 97.5% air and 2.5% ...
Wood grain is the longitudinal arrangement of wood fibers [1] or the pattern resulting from such an arrangement. [2] R. Bruce Hoadley wrote that grain is a "confusingly versatile term" with numerous different uses, including the direction of the wood cells (e.g., straight grain, spiral grain), surface appearance or figure, growth-ring placement (e.g., vertical grain), plane of the cut (e.g ...
The pins are then carefully pulled out of the sand. The critical part of the operation is to separate the cope and drag to remove the pattern. The pattern may be vibrated with a powered vibrator, or the pattern, and maybe the cope and drag flask, will be lightly tapped with a small hammer. The pattern is lifted from the sand, leaving a molding ...