Device and Method for Spraying a Multicomponent Plastic Material

A device for applying a multicomponent plastic to a substrate, comprising:

• a dosing valve controllable by compressed air as a pressure medium and having a first valve inlet for a first component of the multicomponent plastic, a second valve inlet for a second component of the multicomponent plastic and a valve outlet,
• a static spray mixer comprising a tubular mixer housing extending along a longitudinal axis and having a valve-side end and a distal end;
• a mixing element disposed within the mixer housing for producing a component mixture, wherein the mixer housing and the mixing element are made of plastic and the mixing element is a one-piece element that is inserted into the mixer housing;
• and
• an atomization sleeve disposed on the distal end of the mixer housing and having an inlet for a pressurized atomizing medium, the atomization sleeve being attachable to the distal end of the mixer housing along the longitudinal axis of the mixer housing;
• and
• wherein an adapter is provided between the valve outlet of the dosing valve and the valve-side end of the spray mixer for detachably attaching the spray mixer to the dosing valve, the adapter comprising an adapter housing, valve connection means for releasable attachment to the dosing valve;
• and mixer connection means for releasable attachment of the spray mixer to the adapter;
• wherein the valve connection means and the mixer connection means are integrally formed on the adapter housing and the adapter housing has a recess for receiving a divider of the dosing valve.