Caulking

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Hot caulking , more rarely referred to as hot caulking, is one of the manufacturing processes that create permanent, form-fitting , force-fitting and, in some cases, material-to-material connections. In practical use, it represents an alternative to gluing , nailing , riveting and screwing .

Process theory and application

In order to connect plastic carriers with circuit boards or metal components, for example, plastic domes, also called rivet heads, are melted and reshaped using force and heat. It may thermoplastic plastics such as PA , PBT , PC , PE , POM and PP are heißverstemmt. In addition to fixing the components to one another, this connection technology also enables the transmission of forces and / or torques between the individual parts.

Hot caulking is used in the automotive industry , electrical industry and medical technology , among others .

Related processes exist for materials other than plastic. For the material glass, for example, the adapted glass-metal connection is an established technology.

Process alternatives

There are two general process alternatives:

  • On the one hand, the classic hot caulking with a punch that is heated either before or during contact with the product. In addition to the supply of heat, the force acting on the workpiece also takes place via the tool stamp. Depending on the condition and shape, the stamp can be heated in less than 0.5 s. An anti-adhesive surface coating is used to prevent plastic melt from adhering to the stamp.
  • On the other hand, the non-contact hot caulking, which includes laser hot caulking and infrared hot caulking. With laser hot caulking, the laser radiation is absorbed on the surface of the plastic dome, heating it up to the point of local plasitification. A permanent positive connection is created under the action of a pressing force. This process is therefore comparable to laser plastic welding and combines its properties with those of riveting technology . It is particularly suitable for automated production. Infrared hot caulking works in a similar way, in which infrared radiation is used instead of a laser.

literature

Individual evidence

  1. ↑ a b Josef-Martin Kraus: Hot staking offers an alternative to riveting, screwing and gluing. In: maschinenmarkt.vogel.de , November 11, 2008.
  2. ↑ a b Laser caulking - a new way of attaching metal parts to plastic. In: Laser Technik Journal , issue 5/2008, October 29, 2008.
  3. ↑ a b caulking know-how. In: hartmann.gs .
  4. ↑ online  ( page no longer available , search in web archives )  Info: The link was automatically marked as defective. Please check the link according to the instructions and then remove this notice. (PDF; 628 kB) Panacol-Elosol GmbH from March 2008; Retrieved September 16, 2011@1@ 2Template: Dead Link / www.panacol.de  
  5. ↑ LaserMicronics GmbH from May 16, 2011 (PDF; 710 kB) accessed on September 16, 2011
  6. ↑ extolinc.com  ( page no longer available , search in web archives )  Info: The link was automatically marked as defective. Please check the link according to the instructions and then remove this notice. Retrieved November 4, 2015@1@ 2Template: Dead Link / www.extolinc.com