New from auxiliary equipment manufacturer Koch (Ispringen, Germany) is the KEM range of direct-dying machines, marketed as a value-for-money piece of kit when a processor needs to dose masterbatch directly into the input area of a plasticizing screw. The KEM machines help ensure that the shade of the end product remains consistent.
The pellet or powder’s dying is carried out with volumetric chamber volume dosing, done automatically as granulate is supplied to the screw. The main component is added via a free feed device. When the product is changed, there is no mixed material in the machine needing to be removed. Changes to the dosing values can be seen immediately during production.
The KEM models’ control system is integrated in its housing and offers various programs for use with injection molding machines or extruders. The dosing quantities can be variably adjusted in percentages or seconds and the system can store up to 20 different mix recipes. Koch offers a range of dosing rollers for shot weights from 2-10,000g. Direct dosing dying machines in the KEM are available for dosing quantities of 0.5-200 kg/hr.