Method and device for connecting profile parts
A method for connecting plastic profile parts ( 2 ) brings into contact at least one profile part ( 2 ) and a heating surface ( 34 ) of a heating, element ( 36 ) so that the profile part ( 2 ) begins to melt in its welding area before it is joined together with the other profile part ( 2 ). A delimiting element ( 7 ) regulates the flow and deformation of the melt material. The delimiting element ( 7 ) has at least one contact element ( 21 ) and a molded part ( 22 ), which are movable both in relation to one another and in relation to the profile part ( 2 ). During the melting of the at least one profile part ( 2 ), the contact element ( 21 ) is moved—together with the molded part ( 22 )—relative to the at least one profile part ( 2 ) and relative to the heating element ( 36 ) out of, a resting position in the direction of a working position, whereby at least the molded part ( 22 ) is kept in contact with the heating surface ( 34 ) and the contact element element ( 21 ) is, kept in contact with a profile surface ( 9 ). When a changeover is made from melting to compressing, the relatively movable contact element ( 21 ) is moved together with the molded part ( 22 ) in the direction of its working position so that the delimiting element ( 7 ) projects beyond a free front edge ( 4 ) of the at least one profile part ( 2 ) and creates a holding plane ( 37 ).
1. A method for connecting a first plastic profile part ( 2 ) to a second plastic profile part ( 2 ), comprising:
bringing into contact a front edge of the first profile part ( 2 ) and a heating surface ( 34 ) of a heating element ( 36 ) in a joining direction in order to start to melt the first profile part ( 2 ) in its welding area before it is joined to the second profile part ( 2 ),
moving, from a resting position to a working position relative to the first profile part ( 2 ) and relative to the heating element ( 36 ), a delimiting element ( 7 ), said delimiting element ( 7 ) comprising at least one contact element ( 21 ) and a molded part ( 22 ), both of which are movable relative to each other and movable relative to the first profile part ( 2 ), keeping at least a profiled section ( 26 ) of the molded part ( 22 ) in contact with the heating surface ( 34 ) of the heating element ( 36 ) and keeping the contact element ( 21 ) in contact with a profile surface ( 9 ) of the first profile part ( 2 ) as the welding area of the first profile part ( 2 ) is melted; and
before the first profile part ( 2 ) is compressed for joining to the second profile part, moving the contact element ( 21 )—together with the molded part ( 22 )—of the delimiting element ( 7 ) in the direction of its working position so that the profiled section ( 26 ) of the delimiting element ( 7 ) extends beyond the front edge ( 4 ) of the first profile part ( 2 ) to create a holding plane ( 37 ).
2. The method according to claim 1 , wherein the contact element ( 21 )—together with the molded part ( 22 )—is moved at least in a direction parallel to the profile surface ( 9 ) of the first profile part ( 2 ).
3. The method according to claim 1 , wherein the first profile part ( 2 ) is brought into contact with a profile stop ( 33 ) and wherein the contact element ( 21 )—together with the molded part ( 22 )—is moved horizontally into its working position and is brought into contact with the profile stop ( 33 ).
4. The method according to claim 1 , wherein the first profile part ( 2 ) is brought into contact with the heating surface ( 34 ) of the heating element ( 36 ) before melting begins, and wherein contact element ( 21 )—together with the molded part ( 22 )—is moved horizontally into its working position and the molded part ( 22 ) is brought into contact with the heating surface ( 34 ).
5. The method according to claim 1 , wherein the contact element ( 21 )—together with the molded part ( 22 )—is moved along a melt path out of the working position back in the direction of the resting position during the melting of the at first profile part ( 2 ), and the molded part ( 22 ) of the delimiting element ( 7 ) remains in contact with the heating surface ( 34 ) of the heating element ( 36 ).
6. The method according to claim 1 , wherein at the beginning of the compression process, the relatively movable contact element ( 21 )—together with the molded part ( 22 )—initially remains in the working position as the first and second profile parts ( 2 ) are compressed together along a compression path, and is then moved back in the direction of the resting position.
7. The method according to claim 1 , wherein the welding area is profiled by the contact element ( 21 ) after being connected to the other second profile part ( 2 ) as the molded part ( 22 ) of the delimiting element ( 7 ) is moved relative to the contact element ( 21 ).
8. The method according to claim 1 , wherein the delimiting element ( 7 )—with its contact element ( 21 ) together with the molded part ( 22 )—is accommodated for relative movement in a receptacle ( 11 ) of a profile support ( 3 ).
9. A device for connecting first and second profile parts ( 2 ), comprising:
a delimiting element ( 7 ) with which the flow and deformation of melt material of a welding area of the first profile part ( 2 ) to be joined to the second profile part ( 2 ) can be regulated, said delimiting element ( 7 ) being accommodated for relative movement in a receptacle ( 11 ) of a profile support ( 3 ) for the first profile part, the delimiting element ( 7 ) comprising a contact element ( 21 ) and a molded part ( 22 ), both of which are movable relative to one other as well as movable relative to the first profile part ( 2 ), so that before the welding area at a front edge ( 4 ) of the first profile part ( 2 ) is compressed to the second profile part ( 2 ), the contact element ( 21 )—together with the molded part ( 22 )—of the delimiting element ( 7 ) is movable in the direction of its working position so that a profiled section ( 26 ) of the molded part ( 22 ) of the delimiting element ( 7 ) extends beyond the front edge ( 4 ) of the first profile part ( 2 ) to create a holding plane ( 37 ).
10. The device according to claim 9 , wherein the receptacle ( 11 ) is open in the direction of a front face, and has a stop wall ( 13 ) opposite thereto, and wherein a base leg ( 14 ) extends from the stop wall ( 13 ) towards the front face ( 16 ), and the contact element ( 21 ) has a surface ( 8 ) in contact with a profile surface ( 9 ) of the first profile part ( 2 ) and the molded part ( 22 ) has an opposite surface ( 18 ) that rests against a base leg surface ( 19 ).
11. The device according to claim 9 , wherein the profiled section ( 26 ) of the molded part ( 22 ) is a projection ( 27 ) on its front face ( 17 ).
12. The device according to claim 9 , wherein the molded part ( 22 ) is slidably movable relative to the contact element ( 21 ) while a face of the molded part ( 22 ) remains in contact with a base surface ( 23 ) of the contact element ( 21 ).
13. The device according to claim 10 , wherein the molded part ( 22 ) in its working position is spaced apart from the base leg surface ( 19 ).
14. The device according to claim 9 , further comprising a second delimiting element that comprises a second contact element and a second molded part, and wherein the molded part ( 22 ) of the delimiting element ( 7 ) is brought into contact with the second molded part of the second delimiting element as the front edge ( 4 ) of the first profile part ( 2 ) is brought into contact with the second profile part.