Finally, the author explains applications of laser welding plastics by several industrial case studies. First, a grooved microstructure is created on the metal surface by scanning the laser over the area and locally ablating the material. Laser Welding of Plastics and Polymers - Materials, Processes and Industrial Applications by Klein, Rolf. Most laser plastic welding applications are able to use like materials. Anomalies may arise that will fall outside the techniques listed above, however, these can be taken on a case by case basis with the help of expert advice. The part to the right is a gear sensor housing, a very common application in the automotive industry. The laser light is turned into heat energy as it is absorbed by the lower joining partner.
In addition, suitable positioning and clamping fixtures were designed and manufactured. The process is very much different than traditional metal welding. Tailored to the needs of everyone dealing with laser welding of plastics, especially engineers in packaging, component manufacturing, and the medical industry. In most common laser polymer welding applications, the wavelength used is around 980nm, 1 micron which is supplied by a solid state semiconductor diode laser source. This book will be the first more detailed description with basic information about radiation and polymeric material interaction and the influences of thermal and optical material properties available in English.
It offers an alternative to conventional processes such as ultrasonic, vibration or friction welding, mechanical cutting, milling or water jet cutting, tampon printing or ink jet printing. Processes for through transmission welding 4. Irrespective of this, the concept hybrid structures passed the dynamic impact test. Transparent Laser Plastic Welding It is a misconception that laser welding plastics requires one clear part and one opaque part. This is followed by an overview of the physical foundations of laser radiation and laser sources used for plastic welding. Both test types help to understand how failure in the structure unfolds, with the dynamic impact test showing what happens in real life. This is typically accomplished with clamp tooling and nests, but can also be realized through interference fits.
The heat created at the interface creates a molten weld seam and the two plastics are fused. In both the conductive and transmissive approaches, pressure has to be applied to ensure the heat is conducted efficiently into the plastic. Other opaque color combinations are possible as well. As such, it provides comprehensive information on material and process characteristics as well as applications regarding plastic laser welding. It offers an alternative to conventional processes such as ultrasonic, vibration or friction welding, mechanical cutting, milling or water jet cutting, tampon printing or ink jet printing. Tailored to the needs of everyone dealing with laser welding of plastics, especially engineers in packaging, component manufacturing, and the medical industry. While the latter only gives a pass-or-fail report, the quasi-static tests also return a quantitative result—that is, at what torque or at what force the structure fails.
The detail of a structured surface top completed with a continuous-wave laser center row and a nanosecond pulsed laser bottom row. This process is still considered laser plastic welding, but it is not the same concept as through-transmission laser welding, described previously. For this purpose, a design-of-experiment set of trials was carried out to produce simple coupons with various groove patterns, which were then tested in tensile shear, pull, and peel. Material properties of plastics 2. When enough heat is generated in this way locally at the interface, the plastic melts. Finally, the author explains applications of laser welding plastics using several industrial case studies from the automotive industry, household goods, and medical devices. Properties of laser radiation 3.
Pillar 3 — Tight Mechanical Contact Between Both Layers Tight mechanical contact between the parts slated for welding is probably the most critical factor when it concerns getting a good and stable process. Rolf Klein has authored several scientific and technical publications with topics of laser material processing and laser system design. In the first part of the investigation, the influences of the microstructuring parameters on a joint's mechanical performance were investigated. However, there are certain cases that call for two different materials to be welded together. Laser welding of plastics offers advantages in case of cleanness of processed components, low thermal and mechanical stress to components and inner sensitive parts as well as flexibility 2.
One method makes use of a special, optically clear chemical called. . Contact Once the light energy is converted to thermal energy at the surface of the lower part, some of that energy must make its way into the upper layer in order for melting to occur in both parts. Finally, the author explains applications of laser welding plastics using several industrial case studies from the automotive industry, household goods, and medical devices. Titanium dioxide is also used in conjunction with carbon black when colors other than black or grey are desired. Transmissive Layer Natural thermoplastics transmit infrared laser radiation.
The metal heats up and the low thermal conductivity of the plastic ensures a local hot spot, melting the plastic. Based on the results, the technology can now be deployed for semi-structural hybrid assemblies. There are multiple ways to weld two clear polymers with laser. Main advantages for laser marking are flexibility and a contact free process 1. This is followed by an overview of the physical foundations of laser radiation and laser sources used for plastic welding. I will provide a detailed look at clamping technology in a future article. Good contact between the parts ensures that energy can be transferred via conduction.
Although laser beam welding seems to be a relatively expensive processing method, savings can be achieved by entirely consideration of production process and logistics. Tailored to the needs of everyone dealing with laser welding of plastics, especially engineers in packaging, component manufacturing, and the medical industry. Journal Laser Technik Journal — Wiley Published: Sep 1, 2010. Aim of this book is to fill this gap and to give comprehensive information about material and process characteristics as well as applications regarding plastic laser welding. Mastering the 4 pillars of Laser Polymer Welding will provide an excellent foundation for you to begin to design-in the technology. While for seat structures, this has translated mainly into the use of thinner, higher-strength steels up to now—hybrid material structures have also been studied widely in recent years.