PROCEDE ET DISPOSITIF DE PRODUCTION DE JOINTS D'ETANCHEITE PROFILES A EMBOITEMENT

• Main Author: WERNER SIEVERS
• Format: Patent
• Language: French
• Published: 04.04.1986
• Edition: 4
• Subjects: AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING; PERFORMING OPERATIONS; REMOVABLE EXTERNAL PROTECTIVE COVERINGS SPECIALLY ADAPTED FORVEHICLES; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDEDFOR; SHAPING OR JOINING OF PLASTICS; TRANSPORTING; VEHICLES IN GENERAL; WINDOWS, WINDSCREENS, NON-FIXED ROOFS, DOORS, OR SIMILARDEVICES FOR VEHICLES; WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL

PROCEDE DE PRODUCTION DE JOINTS D'ETANCHEITE PROFILES POUVANT ETRE EMBOITES SUR DES NERVURES, EN PARTICULIER POUR DES BORDS DE COMPARTIMENTS DE MOTEURS ET DE COFFRES A BAGAGES, LE JOINT ETANT CONSTITUE PAR UNE BANDE DE SERRAGE EN CAOUTCHOUC DURCI DE SECTION DROITE EN U DANS LAQUELLE DES LEVRES D'ETANCHEITE EN CAOUTCHOUC MOU DIRIGEES VERS L'INTERIEUR SONT PRESENTES, UN TUYAU D'ETANCHEITE EN CAOUTCHOUC MOU DIRIGE VERS L'EXTERIEUR ETANT PRESENT SUR LE DOS DU PROFIL EN U ET LES DIFFERENTES MATIERES ETANT AMENEES A UNE SORTIE DE FILIERE AU MOYEN D'UNE EXTRUDEUSE SEPAREE, LES EXTRUDEUSES 5, 6 DESTINEES AU TUYAU D'ETANCHEITE 2 ET A LA BANDE DE SERRAGE 3 PRESENTENT CHACUNE UNE SECTION DROITE DE SORTIE RELATIVEMENT IMPORTANTE QUI SE REDUIT SUR UN CANAL D'AMENEE ALLONGE A LA SECTION DROITE FINALE, TANDIS QUE L'EXTRUDEUSE 15 DESTINEE AUX LEVRES D'ETANCHEITE 4 PRESENTE UNE SECTION DROITE DE SORTIE BEAUCOUP PLUS PETITE, QUI SE REDUIT A LA SECTION DROITE FINALE PAR UN CANAL D'AMENEE BEAUCOUP PLUS COURT. The sealing strips which can be affixed to webs comprise a clamping strip 3 made of a hard rubber which is U-shaped in cross-section, in which inwardly pointing sealing lips 4 made of a soft rubber are provided on the inner surfaces of the clamping strip's limbs 3a, and an outwardly pointing sealing hose 2 made of a soft (foam) rubber is arranged on the web of the U-shaped clamping strip 3. Despite the use of a sealing hose 2 which cannot easily be buckled, sufficiently high draw-off forces can be applied to the webs. In accordance with the invention, the three different materials of the sealing strip are each delivered to the extrusion die from a separate extruder (Fig. 2), the material for the sealing lips 4 being fed over a considerably shorter feed path in a die head, or respectively in the die thereof, than the materials for the clamping strip 3 and the sealing hose 2.