Sizing

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sizing

[′sīz·iŋ]
(engineering)
Separating an aggregate of mixed particles into groups according to size, using a series of screens. Also known as size classification.
(materials)
(mechanical engineering)
A finishing operation to correct surfaces and shapes to meet specified dimensions and tolerances.
(metallurgy)
Final pressing of a metal powder compact after sintering.
A cold-working operation in which a part is re-pressed in a die to improve surface hardness, smoothness, and dimensional accuracy.

Sizing

Calculation of the heat loss and heat gain for a building at “design temperatures” (close to the maximum and minimum temperatures anticipated for a given location) in order to select heating and cooling equipment of sufficient capacity. Installing excess equipment capacity, or oversizing, is common but leads to inefficient operation and, for air conditioners, decreases the dehumidifica-tion. Also, A thin, pasty substance used as a sealer, binder, or filler; generally consisting of a diluted glue, oil, or resin; often required as an underlayment in applying gold leaf.

Sizing

 

the application to warp yarns of a thin layer of adhesive material (size) in order to increase the yarns’ resistance to abrasion and repeated stretching during weaving. During sizing the individual fibers that form the warp yarn are cemented to one another. Sizes are prepared from chemical materials, such as polyvinyl alcohol or a polyacrylamide, and foodstuffs such as starches; water is used as a solvent.

Sizing is performed on slashers. The warp yarns are unwound from back beams, immersed in the size in a vat, squeezed between rollers, passed to a dryer to remove excess moisture, and finally wound onto the warp beam of a loom. Doubled yarns are not usually sized, nor are yarns made from synthetic fibers or natural silk, which possess adequate smoothness and strength.


Sizing

 

a finishing operation in the production and repair of metal articles, accomplished by squeezing the article to produce smooth surfaces and correct dimensions and to eliminate superficial cracks and gaps between assembled parts.

It also implies surface treatment of cast products of art or of sculpture after drawing them off a mold: smoothing of roughness and joints, final finishing of components.

REFERENCE

Flerov, A. V. Khudozhestvennaia obrabotra metallov. Moscow, 1976.

sizing, size

A liquid which is applied over wood, plaster, or other porous surface to fill the pores; reduces the absorption of a subsequently applied adhesive or coating; used to prepare the surface for finishing or to serve as a base for subsequent coatings.