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04-14-2008

Controlled Discharge

A new type of static-discharge system measures the amount of electrostatic charge prior to initiating the precise discharge process

A new type of static-discharge system measures the amount of electrostatic charge prior to initiating the precise discharge process

Electrostatic charges on products can cause them to adhere to one another as well other objects during plastics processing. In addition, electrically charged plastic parts attract dust and dirt from the surroundings, with the result that problems arise when coating, laminating or painting.

Static eliminators are employed to avoid such difficulties. With conventional systems, however, often only a preset amount of charge can be discharged. Under certain conditions, the result is that, in actual practice, either too little or too much of the opposite charge is applied. Instead of balancing the charge, such devices frequently create an ever greater charge imbalance.

Keyence offers a new generation of static eliminators that first measures that amount of static charge, so that an exact amount of the opposite charge can be applied. In spite of their high performance, integrated electronics and a built-in power supply, the units a very compact.

An LED display indicates the magnitude and polarity of the charge on the object to be treated. In this way, any residual charge can be noted at a glance. The patented pulsed AC technique guarantees elimination of static within an extremely short period of time – often within less than half a second from short distances (approx. 60mm). This makes them over three times faster than conventional static eliminators based on the usual AC technique.

Dr.-Ing. Harald Sambale
sambale <AT> kunststoffe.de

contact
Keyence Deutschland GmbH
Siemensstraße 1
DE 63263 Neu-Isenburg
Tel: +49 6102 3689-0
Fax: +49 6102 3689-100


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