Product category:
Moulding materials
News Release from: Victrex | Subject: PEEK polymer
Edited by the Manufacturingtalk Editorial
Team on 10 March 2003
Polymer selected for X-ray machine
gearwheels
Selecting the right polymer for X-ray machine gearwheels required a capability to transmit, under radiation, high mechanical forces at 80degC.
Selecting the right polymer for X-ray machine gearwheels required a capability to transmit, under radiation, high mechanical forces at 80degC Instrumentarium Imaging Ziehm of Nuremberg, Germany, has been manufacturing and distributing a successful range of mobile X-ray equipment for 30 years
This article was originally published on Manufacturingtalk on 14 Jun 2001 at 8.00am (UK)
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Image detail is confined by the linear motions of the beam restrictor which are actuated by a set of gear wheels made from Victrex PEEK polymer and driven by an aluminium disk cam.
In close cooperation with Bayerschmidt Kunststoffe GmbH from Bavaria, Germany, who specialise in high-precision machined components, Ziehm selected Victrex PEEK polymer for the gear wheels in order to meet the many demanding requirements of this application.
While exposed to an X-ray dose of up to 80 rad, the wheels must transmit high mechanical forces at temperatures as high as 80degC.
In addition, Victrex PEEK polymer provides good tribological properties and minimises the dry abrasion in contact with aluminium, which is an essential working requirement in the sterile environment of operating rooms.
The gear wheels are manufactured from Victrex PEEK polymer stock shapes, supplied by Sustaplast KG from Lahnstein, Germany.
Its low and relatively isotropic thermal expansion is a main advantage that allows the wheels to fit precisely and avoids any gaps.
Furthermore Victrex PEEK polymer allows ease of machining, therefore resulting in gear wheels of the highest precision and closest fit.
Victrex plc, which has its sales, technical and production headquarters at Thornton Cleveleys in Lancashire, UK, had a turnover of more than ?59m in the last financial year.
The company exports 97 percent of its Victrex PEEK polymer output to OEMs in the automotive, industrial, medical, food and electronics market sectors in Europe, North America and Asia Pacific.
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