vt.

～に穴をあける。うがつ。(紙など)にミシン目を入れる

vi.

貫く、うがち入る

adj.

貫通された。ミシン目のある

関: perforation

WordNet

undergo military training or do military exercises
similar to the mandrill but smaller and less brightly colored (同)Mandrillus leucophaeus
(military) the training of soldiers to march (as in ceremonial parades) or to perform the manual of arms
a tool with a sharp point and cutting edges for making holes in hard materials (usually rotating rapidly or by repeated blows)
learn by repetition; "We drilled French verbs every day"; "Pianists practice scales" (同)exercise, practice, practise
teach by repetition
train in the military, e.g., in the use of weapons
cause to be bored (同)tire
a hole or passage made by a drill; usually made for exploratory purposes (同)bore-hole, drill hole
diameter of a tube or gun barrel (同)gauge, caliber, calibre
a person who evokes boredom (同)dullard
make a hole, especially with a pointed power or hand tool; "dont drill here, theres a gas pipe"; "drill a hole into the wall"; "drill for oil"; "carpenter bees are boring holes into the wall" (同)drill
a line of small holes for tearing at a particular place
the act of punching a hole (especially a row of holes as for ease of separation)
a hole made in something; "a perforation of the eardrum"
not perforated; having no opening
an eardrum with a hole or tear in it; can interfere with normal hearing and cause other ear problems
having a number or series of holes; "a perforated steel plate"; "perforated cancellation"; "perforated stamp"

PrepTutorEJDIC

…‘に'穴をあける,‘を'突き通す / 〈紙など〉‘に'ミシン目を入れる,(穴で)切り取り線をつける / (…に)穴をあける,(…を)貫通する《+『into(through)』+『名』》
〈C〉『きり』,『ドリル』,穴あけ機 / 〈U〉練兵,教練 / 〈U〉〈C〉『反復練習』,(系統的な)けいこ / 〈U〉〈C〉(事態に処するための)訓練 / 〈穴〉‘を'『あける』;…‘に'穴をあける / (…を)〈人〉‘に'『繰り返し教え込む』《+『名』〈人〉+『in』+『名』》;(人に)〈物事〉‘を'厳しく訓練して教え込む《+『名』+『into』+『名』〈人〉》 / 〈兵士〉‘を'教練する / 《米俗》〈人〉‘を'撃ち抜く / (きりなどで)貫く,穴をあける / (軍事などの)訓練を受ける,練習する
(種をまくための)小みぞ / 種まき機 / (筋まきした)種の列 / 〈種〉‘を'筋まきする,〈苗〉‘を'筋植えする
雲斎(うんさい)織り(太あや織りの綿布または亜麻布)
bear（実をつける）の過去形
(…に)(きり・ドリルなどで)…‘に'『穴をあける』;〈トンネルなど〉'を'掘る《+『名』+『in』(『into, through』)+名》 / (…に)穴をあける《+in(into, through)+名》 / 穴があく / (穴をあけるように)押し分ける / きりであけた穴 / (穴・円筒・銃身の)内側 / (穴・円筒の)直径,(銃の)口径
(…で)〈人〉'を'『うんざりさせる』,退屈させる《+『名』+『with』(『by』)+『名』(do-『ing』)》 / 《軽べつして》退屈な人(事)
高潮,潮津波
〈U〉穴をあけること / 〈C〉《しばしば複数形で》穴,ミシン目,切り取り線
穴のあいていない / (切手に)ミシン目のない / ミシン目のない切手

Wikipedia preview

出典(authority):フリー百科事典『ウィキペディア（Wikipedia）』「2014/01/26 19:42:51」(JST)

wiki en

[Wiki en表示]

For perforations in an oil well, see Perforation (oil well). For perforation in medicine and surgery, see Organ perforation.

A perforation is a small hole in a thin material or web. There is usually more than one perforation in an organized fashion, where all of the holes are called a perforation. The process of creating perforations is called perforating, which involves puncturing the workpiece with a tool.

Perforations are usually used to allow easy separation of two sections of the material, such as allowing paper to be torn easily along the line. Packaging with perforations in paperboard or plastic film is easy for consumers to open. Other purposes include filtrating fluids, sound deadening, allowing light or fluids to pass through, and to create an aesthetic design.^[1]

Various applications include plastic films to allow the packages to breathe, medical films, micro perforated plate and sound and vapor barriers.

Processes[edit]

Perforation can be created by pins, needles, die and punch or laser.

Pins and needles[edit]

"Volcanic" perforations made with a needle punch

A needle punch used in orienteering

Rotary pinned perforation rollers are precision tools that can be used to perforate a wide variety of materials. The pins or needles can be used cold or heated. Cold perforation tools include needle punches.

There are a handful of manufacturers that specialize in hot and cold needle perforation tooling and equipment. In materials that have elasticity this can result in a "volcano" hole that is preferred in many applications.

Pinned rollers can be made from a variety of materials, including plastic, steel, and aluminum.

In more brittle films, cold perforation can cause slitting rather than creating a round hole, which can jeopardize the material's integrity under pressure. The solution to this is often heating the pin; i.e. hot pin perforation. Hot perforation melts a hole in the material, causing a reinforced ring around the hole. Hot needle perforation also assists when high density pin patterns are utilized, as the heat aids the perforation of the material.

Die and punch[edit]

Die and punch sets can be used for thicker materials or materials that require large holes; this process is the most common for metalworking. The workpiece is sheared by pressing (either by machine or hand tool) the punch through the workpiece and into the die. The middle section of the workpiece is scrap; commonly known as the chad in paper and similar materials. The punch and die are shaped to produce the desired shaped hole. The clearance (the distance between the outside circumference of the punch and the inner circumference of the die) must be properly maintained to ensure a clean cut. Burrs are produced on the side of the workpiece that is against the die.^[1]

Common applications are fruit and vegetable bags, hole punching and ticket punching.

Laser perforation[edit]

Laser cutting can place many precise holes in a web. Laser perforations look similar in many respects to hot needle perforations. However, laser systems are expensive. The big advantage of laser perforation is the consistency of the hole size, compared to mechanical perforation. This is very important in modified atmosphere packaging for fresh produce. The laser perforation is often carried out on roll slitting machines (slitter rewinder)as the printed material is slit down to the finished roll size.

Applications[edit]

Perforation holes on a pair of coil stamps

Perforation frequently refers to the practice of creating a long series of holes or slits so that paper or plastics can be torn more easily along a given line: this is used in easy-open packaging. Since the creation of perforation devices in the 1840s and 1850s, it has seen use in several areas. Postage stamps are one common application of this, where small round holes are cut in lines to create individual pieces (see postage stamp separation). Perforations on stamps are rather large, in the order of a millimeter, in comparison other perforated materials often have smaller holes. It is common for notebooks and legal pads to have perforations making it easier to tear out individual pages. In today's cases, perforation is used in ways to separate loose leaf (or even a form of graph paper from a ringed binder). A fine perforation next to the rings allows the page to be separated from the book with no confetti. Screwcaps on glass or plastic bottles are sealed with a ring at the bottom of the cap attached by perforation. Twisting the cap has the effect of rupturing the material between the perforations and indicating that the original seal has been broken.

Perforated punch card

Film stock is perforated to allow it to be moved precise distances at a time continuously. Similarly, punched cards for use in looms and later in computers input and output devices in some cases were perforated to ensure correct positioning of the card in the device, and to encode information.

Perforation of steel strips is used in the manufacture of some zesters and rasps.

Historically, perforation patterns other than linear were used to mark stamps (see Perfin). Today, similarly elaborate perforation patterns continue to be used in orienteering.

References[edit]

Wikimedia Commons has media related to Perforations.

^ ^a ^b Todd, Robert H.; Allen, Dell K.; Alting, Leo (1994), Manufacturing Processes Reference Guide, Industrial Press Inc., pp. 103–104, ISBN 0-8311-3049-0.

Stewarts Pinned Products http://www.pinnedproducts.co.uk

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Related Pictures

★リンクテーブル★

リンク元	「bore」「drill」「穿孔」「perforation」「穿孔処理」
拡張検索	「anterior perforated substance」「perforated peptic ulcer」「perforated colon」「imperforate anus」