Featuring 3 Catheter Tube Bonding experts, with over 60 years of cumulative experience in Laser, RF and resistive heating tube bonding, this webinar will cover topics including Material Selection, Configuration, Manufacturability and Testing. Our experts will teach techniques and the critical steps used to create quality repeatable tube bonds.
WHAT PARTICIPANTS CAN EXPECT TO LEARN:
To select an appropriate mandrel, then flare one material or neck the other for insertion. Measure the OD and select appropriate FEP.
Within .050” of the material. Autotuning maintains stable temperature.
The braid moves when the polymer around it is heated. Vante RF technology and tooling is designed to minimize the width of the heating zone to prevent braid exposure. Annealing the braid and high-quality end cuts also improve bonding results.
Lubricants can impact the process both positively and negatively. Lubricants aid in enhancing flow of the plastic, but by their nature inhibit strong bonding forces. For some applications a PTFE sleeve or non-stick coating can be designed into the tooling design to achieve higher strength bonds.
Good flow of plastic and higher push forces results in products with higher bond forces, but visually there will be blending of the plastics. Tubing sizing, concentricity and clean cuts can support a better bond strength with less blending.
Spot size is defined as the energy density being delivered to the product. The laser can be mechanically adjusted to make the beam bigger or smaller. The further away I’m with the Focal point, the bigger the spot size gets and the lower the energy density is.
Misalignment of the product to the laser will impact the process. As straight mandrel is a critical input for a consistent process. Consider the Machine Solutions MS1000 mandrel straightener for high volume production environments. It is definitely better if they’re straight, but also with a bit of a wobble you’re still able to get decent welds. The only thing which changes is that you get less acurate regarding the size of the weld.
I assume colorant from the material? No this should not have an effect, CO2 Laser have such a long wavelength the energy is absorbed on the surface of the material . This is also the reason why we’re able to weld transparent materials, respectively why we can use transparent shrinking tubes.