Thermoforming- plastics - machinery - Import export

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. During the heating-up phase the hot air riveting does not get into contact with the material. A continous hot air flow heats up the riveting pin. Here the forming of the riveting head is carried out with a cold stamp in a separate station. By the cooling phase next in line a lower relaxation of the plastic material is achieved by pressure and mold constraint

One of the advantages which distinguishes the thermal riveting procedure from other assembly techniques is the safe form-fit. Another advantage: the thermoplastic cannot embrittle as in the case of ultrasonic welding. Apart from the well-established welding techniques for plastic parts in series, KLN Ultraschall AG also develops and produces in Heppenheim equipment for thermal riveting. This technique is still regarded as a very special procedure and has important advantages in comparison with ultrasonic, hot plate, vibration or spin welding. Thus it can be interesting for additional fields of application. This procedure is particularly applied for plastic parts having safety features. In contrast to the ultrasonic riveting, the thermal riveting can be applied without any problems for plate/ plastic assemblies, as no swinging tools are touching the plates which could endanger the assembly.

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. 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.