US 11,987,010 B2
Method for producing a welded connection, and welding device
Albert Lueghamer, Sierning (AT); and Gerald Severa, Bad Hall (AT)
Assigned to agru Kunststofftechnik Gesellschaft m.b.H., Bad Hall (AT)
Appl. No. 17/275,066
Filed by agru Kunststofftechnik Gesellschaft m.b.H., Bad Hall (AT)
PCT Filed May 22, 2019, PCT No. PCT/AT2019/060169
§ 371(c)(1), (2) Date Apr. 8, 2021,
PCT Pub. No. WO2020/232479, PCT Pub. Date Nov. 26, 2020.
Prior Publication US 2022/0055318 A1, Feb. 24, 2022
Int. Cl. B29C 65/00 (2006.01); B29C 65/22 (2006.01); B29C 65/30 (2006.01); B29C 65/34 (2006.01)
CPC B29C 66/872 (2013.01) [B29C 65/222 (2013.01); B29C 65/30 (2013.01); B29C 65/342 (2013.01); B29C 66/5221 (2013.01); B29C 66/73921 (2013.01); B29C 66/91315 (2013.01); B29C 66/91317 (2013.01)] 10 Claims
OG exemplary drawing
 
1. A method for connecting a thermoplastic line element to a connecting element comprising the method steps:
providing the at least one thermoplastic line element;
providing the connecting element having a thermoplastic body, wherein a heating element is embedded in the body for generating heat in a welding region for welding the body to the at least one line element;
joining the connecting element to the at least one thermoplastic line element;
providing a welding device for welding the connecting element to the at least one thermoplastic line element;
inputting information about the connecting element to be welded into the welding device;
welding the connecting element to the at least one thermoplastic line element by generating heat in the welding region by means of the welding device;
stopping via the welding device the welding of the connecting element to the at least one thermoplastic line element before an end of a planned welding duration and/or outputting via the welding device an error message when an error criterion is reached;
wherein an error counter, which is implemented in the welding device, sums up a number of error events;
wherein the welding device is has a control unit configured such that:
the error criterion is reached when a specified number of error events are summed up;
an error message is added to the error counter when, over an error period, an actual value of a welding current lies outside a target value tolerance of a target value of the welding current;
if the actual value of the welding current returns within the target value tolerance of the welding current within the error period, no error message is output to the error counter and if the actual value of the welding current lies outside the target value tolerance of the target value of the welding current again, the error period starts running anew; and
if there is an overshooting of the target value tolerance over the complete error period, an error message is transmitted to the error counter at the end of the error period.