Draft angle


Draft angle

A draft angle describes the amount of taper for molded or cast parts perpendicular to the parting line.

Consider the fabrication of a hollow plastic box, without lid. Once the plastic has hardened around the mold, the mold must be removed. As the plastic hardens, it may contract slightly. By tapering the sides of the mold by an appropriate "draft angle", the mold will be easier to remove.

If the mold is to be removed from the top, the box should taper in towards the bottom, such that measuring the bottom internal dimension will yield a smaller length and width than measuring the top from which the mold is extracted.

By specifying the opening length and width, a draft angle, and a depth, it is not necessary to specify the dimensions for the internal surface, as these may be calculated from the above.

The manufacture of a part that incorporate zero or negative angles may require a mold that can be separated into two or more parts, in order to release the casting.


Wikimedia Foundation. 2010.

Look at other dictionaries:

  • Draft (engineering) — A cylinder with longitudinal draft Profile view of a drafted cy …   Wikipedia

  • Draft (hull) — Draft marks on a ship s bow The draft (or draught) of a ship s hull is the vertical distance between the waterline and the bottom of the hull (keel), with the thickness of the hull included; in the case of not being included the draft outline… …   Wikipedia

  • Angle of draught — Draught Draught, n. [The same as draft, the spelling with gh indicating an older pronunciation. See {Draft}, n., {Draw}.] 1. The act of drawing or pulling; as: (a) The act of moving loads by drawing, as by beasts of burden, and the like. [1913… …   The Collaborative International Dictionary of English

  • Draft Riots — Affiche officielle du recrutement, New York 23 juin 1863. Les Draft Riots (en français : « Émeutes de la conscription »), que l on nomme à l époque Draft Week[1] (en français : « Semain …   Wikipédia en Français

  • Draft — For a discussion of British and American spelling differences, see Draught and draft. Contents 1 Watercraft dimensions 2 Selection processes 3 …   Wikipedia

  • Draft (sail) — In nautical parlance, the draft or draught of a sail is a degree of curvature in a horizontal cross section. Any sail experiences a force from the prevailing wind just because it impedes the air s passage. A sail with draft also functions as an… …   Wikipedia

  • draft — I. noun Etymology: Middle English draght; akin to Old English dragan to draw more at draw Date: 13th century 1. a. the act of drawing a net b. haul 2b 2. a. the act or an instance of drinking or inhaling; also the portion drunk or inhaled in one… …   New Collegiate Dictionary

  • Kurt Angle — en 2006. Données générales Nom complet Kurt Angle Nom de ring …   Wikipédia en Français

  • WWE Draft 2007 — WWE Brand Extension Le Brand Extension de la World Wrestling Entertainment était utilisé la première fois en 2002 comme terme pour désigner la séparation de ses shows télévisés en deux divisions distinctes et exclusives, RAW et SmackDown!. En… …   Wikipédia en Français

  • WWE Draft Lottery — WWE Brand Extension Le Brand Extension de la World Wrestling Entertainment était utilisé la première fois en 2002 comme terme pour désigner la séparation de ses shows télévisés en deux divisions distinctes et exclusives, RAW et SmackDown!. En… …   Wikipédia en Français