臺灣國際科展

Cable Stripper

科展類別
臺灣國際科展作品
屆次
2010 年
科別
工程學科
得獎情形
三等獎
學校名稱
Kathu High School
作者
Stephanus Franccois Coetzee
關鍵字
stripping cables、cable jackets、

摘要或動機

PURPOSE OF THE RESEARCH

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The purpose of this project is to provide a cost-effective and efficient way of

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stripping electrical conductors, with thicknesses of 16mm up to 70mm in diameter,

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of their isolation. The current methods that are available are unsafe and unpractical.

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Therefore this project determines a safe way of stripping cables and also provides a

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new product to improve the worker’s safety during the process of stripping cables.

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PROCEDURES

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The solution can be found by doing research on the types of cable isolations

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currently on the market. By talking to the workers who use these types of tools, and

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strip these types of cables on a daily basis, I can comprehend the problems posed by

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the present methods and provide a solution.

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DATA

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An electrical cable is commonly a conductive wire surrounded by a nonconductive,

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insulation sleeve. In order to splice two cables together or connect the

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cable to an electrical device, the conductive wire inside the sleeve needs to be

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exposed.

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Numerous tools have been developed for slitting and stripping the electrical

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cable in order to expose the said conductive wire. The simplest tool is a knife with

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which the user makes an annular cut in the sheathing. The end portion of the

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sheathing then is pulled away exposing the individually insulated wires and the bare

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ground wire. The knife may also be used to cut away a short portion of the

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insulation at the ends of the wires. During both operations the user has to be

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extremely careful, or else the knife blade may damage the insulation around the

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internal wires and even nick the conductor or he may injure himself. To do so the

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user must first cut away several inches of the plastic sheathing at the end of the

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cable. A short length of the insulation then is removed from around each end of the

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conductors.

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As an alternative to using a knife, various scissors-like wire strippers have been

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developed. Although such scissors-like wire strippers are effective for removing the

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insulation from individual wires within an electrical cable, they are not efficient for

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removing the sheathing from the end of the cable in order to expose the individually

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insulated wires.

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A disadvantage of using a conventional knife and with using the known wire

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stripper is that a cable having a relatively thick insulation sleeve is difficult to strip

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and thus prepare for connections, since conventional wire stripping tools and other

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conventional devices, such as knives or tools with enclosed blades are inefficient for

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stripping thicker cable jackets.

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A further disadvantage of the known wire strippers is that, its basic

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characteristic dictates that the degree of friction between the tool and the wire after

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the insulation has been ringed will be high. This occasions no particular difficulty

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when only a short length of insulation is to be removed from the end of the wire.

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However, when yards and yards of insulation are to be stripped, as may be the case

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when reel ends are to be prepared for scrapping, the conventional wire stripper

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generates so much friction that it cannot be efficiently utilised.

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CONCLUSION

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The developed product enables workers to effectively strip electrical

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conductors without any impeding danger to themselves or the risk of damaging said

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cable. It is cost-effective and saves a lot of time. After several tests of the product no

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problems have been encountered up to this point.


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