Application Description

Five injection-moulded parts of DuPont™ Delrin® 500P contribute to the smooth, efficient operation of the Bocemix, a patented new bone-cement mixer which makes injecting acrylic bone-cement faster, easier and more consistent for orthopaedic surgeons.

Benefits Gained

Delrin® 500P good elongation at yield makes it possible to mould a leaf-spring as an integral part of the trigger lever, thus eliminating the need for a metal return-spring and related assembly operations. The C-shaped antiscrew pull tab is held in place with a snap-fit, made possible by the acetal’s combination of toughness and stiffness.

The Bocemix benefits include:

• faster cement preparation time, improved mixing quality
• almost complete elimination of air and gas bubbles from the mixed cement
• operation under permanent vacuum.

Materials Selected and Why

The combination of characteristics of unreinforced Delrin® 500P that made this design possible include a blend of toughness and stiffness, high tensile strength, dimensional stability and a low-friction surface.

Manufacturer

Bidoia S.a.s .
18 via dell’Artigianato
35010 Peraga di Vognza (Padova)
Italy
Tel.: +39 049 893 0259 and +39 049 893 0513
E-Mail: bidoia@bihos.com
www.bidoia.com