Hydraulic riveting machine

servo

The riveting process creates irresolvable interlocking bonds. This is achieved by forming or reforming of thermoplastics. In most cases in this procedure only point-shaped or segmented joints are realized. In contrast to welding of two components there cannot be achieved hermetic joints. A particular version of this procedure is the bonding of plastics with metals, textiles and cardboard. The method is frequently used for wooden decoration parts, into which a chrome decoration strip has to be embedded. Welding of parts by forming or reforming Creation of a point-shaped or segmented joint Overlapping of the joint is necessary One of the welding partners must have a clearance hole Connections of dissimilar and similar plastics Bonding of plastics with metals, textiles or cardboard Cost-efficient assembly and welding technology In contrast to ultrasonic riveting the thermal riveting can be used without any problems for metal/plastic connections, since no vibrating tools have contact to the metal sheets, thus the joint is not endangered. Particularly in critical plastics like POM or PA-GF which tend to embrittle in ultrasonic riveting, with thermal riveting a very high quality of joints can be achieved. This method is also very useful, if it is very important to avoid contamination of the parts by embrittled particles. As a rule the hot form riveting is carried out in a one-cycle process. A heated riveting stamp forms the riveting head under pressure. After forming the stamp is shortly cooled down in order to avoid adhesion of the plastic material on the thermal riveting stamp. After this short cooling phase the riveting stamp is again moved above.