A funnel is a pipe with a wide, often conical mouth and a narrow stem. It is used to channel liquid or fine-grained substances into containers with a small opening. Liquid is one of the principal States of matter. A liquid is a Fluid that has the particles loose and can freely form a distinct surface at the boundaries of Without a funnel, much spillage would occur.
Funnels are usually made of stainless steel, glass, or plastic. In Metallurgy, stainless steel is defined as a Steel Alloy with a minimum of 11 Glass in the common sense refers to a Hard, Brittle, transparent Solid, such as that used for Windows many Plastic is the general common term for a wide range of synthetic or semisynthetic organic solid materials suitable for the manufacture of industrial products The material used in its construction should be sturdy enough to withstand the weight of the substance being transferred, and it should not react with the substance. For this reason, stainless steel or glass are useful in transferring diesel, while plastic funnels are useful in the kitchen. Diesel or Diesel fuel (ˈdiːzəl in general is any Fuel used in Diesel engines The most common is a specific fractional distillate of petroleum Sometimes disposable paper funnels are used in cases where it would be difficult to adequately clean the funnel afterwards (for example, in adding motor oil to a car). Paper is thin material mainly used for writing upon printing upon or packaging Dropper funnels, also called dropping funnels or tap funnels, have a tap to allow the controlled release of a liquid. A dropping funnel is a type of Laboratory glassware used to transfer fluids
The term "funnel" is sometimes used to refer to the chimney or smokestack on a steam locomotive or a ship. A chimney is a system for venting hot Flue gases or Smoke from a Boiler, Stove, Furnace or Fireplace to the outside A locomotive is a railway Vehicle that provides the motive power for a Train. A ship /ʃɪp/ is a large vessel that floats on water Ships are generally distinguished from Boats based on size There is also a type of spider known as a funnel-web due to its habit of building its web in the shape of a funnel. Spiders are Predatory Invertebrate Animals that have two body segments, eight legs no chewing mouth parts and no wings The term "funnel" is even applied to other seemingly strange objects like a smoking pipe or even a humble kitchen bin.
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Laboratory funnels
There are many different kinds of funnels that have been adapted for specialized applications in the laboratory. Filter funnels, thistle funnels (shaped like thistle flowers), and dropping funnels have stopcocks which allow the fluids to be added to a flask slowly. A filter funnel is a Laboratory funnel used for separating solids from liquids via the laboratory process of filtering. A thistle tube is a piece of Laboratory glassware consisting mostly of a shaft of tube with a reservoir and Funnel -like section at the top This article is about the plant for other uses see Thistle (disambiguation. A dropping funnel is a type of Laboratory glassware used to transfer fluids For solids, a powder funnel with a wide and short stem is more appropriate as it does not clog easily.
When used with filter paper, filter funnels, Buchner and Hirsch funnels can be used to remove fine particles from a liquid in a process called filtration. Filter paper is a semi-permeable Paper barrier placed Perpendicular to a liquid flow A Büchner funnel is a piece of Laboratory equipment used in Suction filtration. A Büchner funnel is a piece of Laboratory equipment used in Suction filtration. Filtration is a mechanical or physical operation which is used for the separation of solids from fluids (liquids or gases by interposing a medium to fluid flow through which the fluid For more demanding applications, the filter paper in the latter two may be replaced with a sintered glass frit.
Separatory funnels are used in liquid-liquid extractions. A separating funnel, also known as separation funnel, separatory funnel, or colloquially sep funnel, is a laboratory glassware used in Liquid-liquid Liquid-liquid extraction, also known as solvent extraction and partitioning, is a method to separate compounds based on their relative solubilities in two
Construction
Glass is the material of choice for laboratory applications due to its inertness compared with metals or plastics. However, plastic funnels made of unreactive polyethylene are used for transferring aqueous solutions. Polyethylene or polythene ( IUPAC name poly(ethene) is a Thermoplastic commodity heavily used in consumer products (notably the Plastic is most often used for powder funnels which do not come into contact with solvent in normal use.
In culture
The inverted funnel is a symbol of madness. It appears in many Medieval depictions of the mad. For example in Hieronymus Bosch's The Ship of Fools and The Allegory of Gluttony and Lust. Hieronymus Bosch ( Dutch, born Jeroen Anthonissen van Aken c 1450 &ndash August 9, 1516) was an Early Netherlandish Ship of Fools (painted c 1490 – 1500) is a painting by Hieronymus Bosch which shows prodigal humans wasting their lives by playing cards Allegory of Gluttony and Lust is a Hieronymus Bosch painting made sometime between 1490 and 1500
In popular culture, the Tin Woodman in L. Frank Baum's classic novel The Wonderful Wizard of Oz (and in most dramatizations of it) uses an inverted funnel for a hat, though that is never specifically mentioned in the story - it originated in W.W. Denslow's original illustrations for the book. The Tin Woodman (also known as the Tin Man or the Tin Woodsman, the latter appearing only in adaptations the former used only occasionally by Baum is a character Lyman Frank Baum ( May 15 1856 &ndash May 5 1919) was an American Author, Actor, and Independent filmmaker William Wallace Denslow ( May 5, 1856 &ndash March 29, 1915) &ndash usually credited as W
See also
- Funneling
- Tundish used in continuous casting
External links
Continuous Casting (also called Strand Casting is the process whereby molten steel is solidified into a "semifinished" billet bloom or slab for subsequent rolling in the finishing millsDictionary
funnel
-noun
- A vessel of the shape of an inverted hollow cone, terminating below in a pipe, and used for conveying liquids etc. into a close vessel; a tunnel.
- A passage or avenue for a fluid or flowing substance; specifically, a smoke flue or pipe; the chimney of a steamship or the like.
-verb
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