Device and process for the production of a reaction mixture from at least two flowable reaction components

In a process of the operation of a device for the production of a reaction mixture from at least two flowable reaction components, the steps comprising:

• a) providing storage containers and supply lines which lead via at least one servo-controlled inlet member into a mixing chamber,
• b) opening the inlet member by activating a moving electromagnet of a sliding valve such that a slide is pressed against a restoring spring, and following conclusion of the mixing process,
• c) deactivating said moving electromagnet to return the slide to the closed position;
• the improvement comprising the steps of:
• d) providing a holding magnet in the a second opposing side of the slide,
• e) activating the holding electromagnet to build up a maximum force of the holding electromagnet which is greater than a maximum force of the moving magnet,
• f) activating the moving electromagnet after a delay time in which the holding magnet has built up its maximum force,
• g) opening the slide by deactivating the holding electromagnet after the moving magnet has built up its maximum force, thereby causing the force of the moving electromagnet to open the slide.