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In manufacturing, threading is the process of creating a screw thread.More screw threads are produced each year than any other machine element. [1] There are many methods of generating threads, including subtractive methods (many kinds of thread cutting and grinding, as detailed below); deformative or transformative methods (rolling and forming; molding and casting); additive methods (such as ...
There are a number of inherent dangers in the machines, to which inattentive or poorly trained weavers can fall victim. The most obvious is the moving reed, the frames which hold the heddles and the "pinch" or "sand" roll utilized to keep the cloth tight as it passes over the front of the machine and onto the doff roll.
The word "loom" derives from the Old English geloma, formed from ge-(perfective prefix) and loma, a root of unknown origin; the whole word geloma meant a utensil, tool, or machine of any kind. In 1404 "lome" was used to mean a machine to enable weaving thread into cloth.
A metal reed on end. Both the wires and the slots in the reed are known as dents [7] (namely, teeth). [5] The warp threads pass through the dents after going through the heddles and before becoming woven cloth. [1] The number of dents per inch (or per cm or per 10 cm) indicates the number of gaps in the reed per linear width.
The tertiary motions of the loom are the stop motions: to stop the loom in the event of a thread break. The two main stop motions are the Warp stop motion; Weft stop motion; The principal parts of a loom are the frame, the warp-beam or weavers beam, the cloth-roll (apron bar), the heddles, and their mounting, the reed. The warp-beam is a wooden ...
A die head is a threading die that is used in the high volume production of threaded fasteners. Die heads are commonly used on lathes, turret lathes, screw machines and CNC lathes. They may be used for either cutting a thread or rolling a thread. They may also be used for internal or external thread cutting.
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A drawing of Thomas Highs' spinning jenny, taken from Edward Baines's History of the Cotton Manufacture in Great Britain. Thomas Highs (1718–1803), of Leigh, Lancashire, was a reed-maker [1] [2] and manufacturer of cotton carding and spinning engines in the 1780s, during the Industrial Revolution.
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