US 10,889,064 B1
Process for laser welding of crosslinked polyethylene
Donald Currey, Chagrin Falls, OH (US); Scott R. Gardner, Chagrin Falls, OH (US); and William Blue, Middlefield, OH (US)
Assigned to Mercury Plastics LLC, Middlefield, OH (US)
Filed by Mercury Plastics LLC, Middlefield, OH (US)
Filed on Apr. 26, 2018, as Appl. No. 15/963,914.
Claims priority of provisional application 62/490,283, filed on Apr. 26, 2017.
Int. Cl. B29C 65/16 (2006.01); B23K 26/00 (2014.01); B23K 26/282 (2014.01); B29C 65/00 (2006.01); B29L 23/00 (2006.01); B29K 623/00 (2006.01)
CPC B29C 65/1638 (2013.01) [B23K 26/0006 (2013.01); B23K 26/282 (2015.10); B29C 66/612 (2013.01); B29C 66/71 (2013.01); B29K 2623/0691 (2013.01); B29L 2023/22 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A process for laser welding crosslinked polyethylene components, comprising the following steps:
providing a transmissive crosslinked polyethylene component;
providing an absorptive crosslinked polyethylene component;
expanding an end of the transmissive crosslinked polyethylene component;
inserting an end of the absorptive crosslinked polyethylene component into the expanded end of transmissive crosslinked polyethylene component;
contracting the expanded end of the transmissive crosslinked polyethylene component using shape memory to form a compressive contact with the end of the absorptive crosslinked polyethylene component; and
directing a laser beam through the transmissive crosslinked polyethylene component onto an outer surface of the absorptive crosslinked polyethylene component,
wherein the step of contracting the expanded end of the transmissive crosslinked polyethylene component using shape memory creates a mechanical bond between the transmissive crosslinked polyethylene component and the absorptive crosslinked polyethylene component,
wherein the step of directing a laser beam creates a thermal fusion bond between the transmissive crosslinked polyethylene component and the absorptive crosslinked polyethylene component.