Molding (process)
Molding (process)
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For other uses, see Mold (cooking implement).
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One half of a bronze mold for casting a socketed spear head dated to the period 1400-1000 BC. There are no known parallels for this mold.
Stone mold of the Bronze Age used to produce spear tips.
Ancient Greek molds, used to mass-produce clay figurines, 5th/4th century BC. Beside them, the modern casts taken from them. On display in the Ancient Agora Museum in Athens, housed in the Stoa of Attalus.
Ancient wooden molds used for jaggery & sweets, archaeological museum in Jaffna, Sri Lanka.
Molding or (see spelling differences) is the process of manufacturing by shaping liquid or pliable raw material using a rigid frame called a mold or matrix.1 This itself may have been made using a pattern or model of the final object.
A mold or mould is a hollowed-out block that is filled with a liquid or pliable material like plastic, glass, metal, or ceramic raw materials.2 The liquid hardens or sets inside the mold, adopting its shape. A mold is the counterpart to a cast. The very common bi-valve molding process uses two molds, one for each half of the object. Piece-molding uses a number of different molds, each creating a section of a complicated object. This is generally only used for larger and more valuable objects.
The manufacturer who makes the molds is called the moldmaker. A release agent is typically used to make removal of the hardened/set substance from the mold easier. Typical uses for molded plastics include molded furniture, molded household goods, molded cases, and structural materials.
Źródło: https://en.wikipedia.org/wiki/Molding_(process)
Moulding plane
In woodworking, a plane (molding plane in US spelling) is a specialised plane used for making the complex shapes found in wooden s. 1
Traditionally, planes were blocks of wear resistant hardwood, often beech or maple, which were worked to the shape of the intended . The blade, or iron was likewise formed to the intended profile and secured in the body of the plane with a wooden wedge. A traditional cabinetmakers shop might have many, perhaps hundreds, of planes for the full range of work to be performed. The late nineteenth century brought modern types which were all-metal affairs such as the American Stanley No. 55 Universal Plane2 and the English Record No. 405 Multi-Plane with a wide variety of interchangeable cutters, integral fences, and "nickers", small cutting edges which score the grain fibers when working across the board.3
Large crown s required planes of six or more inches in width, which demanded great strength to push and often had additional peg handles on the sides, allowing the craftsman's apprentice or other worker to pull the plane ahead of the master who guided it.4:132
Stanley No. 55 Universal plane with wide array of interchangeable cutters.
While generally considered outdated, a modern furniture shop doing reproduction or restoration work might keep a collection of planes to match original work, or to build in an authentic manner.
The earliest known record of a plane is a plane iron of Roman origin unearthed in Cologne, Germany.4:116
In modern industry, the work of the plane has been taken up by the electrically powered spindle moulder or wood shaper. On a smaller scale, the hand-held or table-mounted electric router allows the use of interchangeable router bits of a wide variety of profiles and is readily available to the small business or home craftsperson.
Źródło: https://en.wikipedia.org/wiki/Moulding_plane
Molding, or
Molding, or (Commonwealth), also known as coving (UK, Australia), is a strip of material with various profiles used to cover transitions between surfaces or for decoration. It is traditionally made from solid milled wood or plaster, but may be made from plastic or reformed wood. In classical architecture and sculpture, the molding is often carved in marble or other stones.
A "sprung" molding has bevelled edges that allow mounting between two non-parallel planes (such as a wall and a ceiling), with an open space behind the molding. Other types of molding are referred to as "plain".
Contents
1 Theory
2 Types
3 See also
4 References
5 Further reading
Theory
At their simplest, moldings are a means of applying light- and dark-shaded stripes to a structural objects without having to change the material or apply pigments. The contrast of dark and light areas gives definition to the object.
Imagine the vertical surface of a wall lit by sunlight at an angle of about 45 degrees above the wall. Adding a small overhanging horizontal molding to the surface of the wall will introduce a dark horizontal shadow below the molding, which in consequence is called a fillet molding. Adding a vertical fillet to a horizontal surface will create a light vertical shadow. Graded shadows are possible by using moldings in different shapes: the concave cavetto molding produces a horizontal shadow that is darker at the top and lighter at the bottom; an ovolo (convex) molding makes a shadow that is lighter at the top and darker at the bottom. Other varieties of concave molding are the scotia and congé and other convex moldings the echinus, the torus and the astragal.
Placing an ovolo directly above a cavetto forms a smooth s-shaped curve with vertical ends that is called an ogee or cyma reversa molding. Its shadow appears as a band light at the top and bottom but dark in the interior. Similarly, a cavetto above an ovolo forms an s with horizontal ends, called a cyma or cyma recta. Its shadow shows two dark bands with a light interior.
Together the basic elements and their variants form a decorative vocabulary that can be assembled and rearranged in endless combinations. This vocabulary is at the core of both classical architecture and Gothic architecture.
Decorative moldings have been made of wood, stone and cement. Recently moldings made of Expanded Polystyrene (EPS) as a core with a cement-based protective coating have become popular. These moldings have environmental, health and safety concerns that were investigated by Doroudiani et al.1
Źródło: https://en.wikipedia.org/wiki/Molding_(decorative)