Method and device for connecting profile parts

Abstract

A method for connecting plastic profile parts () brings into contact at least one profile part () and a heating surface () of a heating, element () so that the profile part () begins to melt in its welding area before it is joined together with the other profile part (). A delimiting element () regulates the flow and deformation of the melt material. The delimiting element () has at least one contact element () and a molded part (), which are movable both in relation to one another and in relation to the profile part (). During the melting of the at least one profile part (), the contact element () is moved—together with the molded part ()—relative to the at least one profile part () and relative to the heating element () out of, a resting position in the direction of a working position, whereby at least the molded part () is kept in contact with the heating surface () and the contact element element () is, kept in contact with a profile surface (). When a changeover is made from melting to compressing, the relatively movable contact element () is moved together with the molded part () in the direction of its working position so that the delimiting element () projects beyond a free front edge () of the at least one profile part () and creates a holding plane ().