Air blow system - for delivering drops of mixt. of two components e.g. resin and hardener

摘要

In an appts. for mixing a two-component mixt. of a resin and hardener, and for metering individual amts. of the mixt. capable of delivery on demand, having (i) two pumps the delivery volumes of which per drive stroke can be adjusted by adjusting the length of drive levers and (ii) a nozzle delivering the metered quantities, a blow system is provided for blowing the metered quantity of mixt. off the nozzle. More esp., the blow system comprises a device for producing an air pulse each time the metering process is switched off and a blow channel assembly which conducts the air pulse in the outlet direction in the vicinity of the nozzle outlet orifice as the blow jet. Partic. where high viscosity mixtures are involved the portable apparatus ensures that the smallest drips are blown off. No stripper device is required.