Banding system quickly produces shock absorbers
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Trelleborg Sealing Solutions UK product story
Edited by the Engineeringtalk editorial team
Jun 30, 2008
Engineers at Trelleborg Sealing Solutions have come up with an alternative to the traditional method of sealing the pistons of car shock absorbers.
Engineers at Trelleborg Sealing Solutions have come up with an alternative to the traditional method of sealing the pistons of car shock absorbers.
A flat disc of Turcon PTFE-based material is pulled over the piston.
To do this a special assembly machine was engineered and developed by the company.
A car's shock absorber includes a hydraulic piston, which moves within the absorber housing and damps the vibration from the road.
The piston needs a seal to enable the shock absorber to perform.
Traditionally a band of PTFE-based sealing material was wrapped around the piston manually.
The disadvantage of this method is that it tends to be time consuming and it is difficult to achieve high volume throughput, which is something the carmakers demand.
"The manufacturers of shock absorbers really liked the new concept from Trelleborg Sealing Solutions, which gave a banding of consistent quality in high volumes", says Michael Andersen, General Manager of the Trelleborg Sealing Solutions manufacturing unit in Helsingor, Denmark.
"The automated assembly machine technology was ours and the first thought was that we should do the assembly of the bands onto the pistons at our production facility".
"That, though, did not make sense from a manufacturing flow point of view".
"The most efficient point to do this was at the piston manufacturer, after they were sintered".
"So we proposed we specify and commission the assembly machines, then sell them to the piston manufacturer for use in their production line".
A significant installed base of piston banding machines is now successfully supplying banded pistons to major shock absorber manufacturers and demand continues to rise with more assembly machines commissioned during 2007 than ever before.
The global capabilities of Trelleborg Sealing Solutions allowed it to support its customers as they have expanded their production globally from Europe into the US, Russia and Asia.
Assembly machines are currently being supplied to China and rather than ship discs all the way there, the technology for disc production has been transferred to the Trelleborg Sealing Solutions facility in Shanghai.
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