Home
Global Supplier Directory
APPLIANCE Engineer
Supplier Solutions
APPLIANCE Line
Whitepaper Library
Calendar of Events
Association Locator
Contents Pages
Market Research
Subscription Center


 
   
issue: July 2004 APPLIANCE Magazine

Plastics & Plastic Parts
Plastic Triplets: High Power Plastic


 Printable format
 Email this Article
 Search

by David Simpson, Contributing Editor

When designing its new Zeus anesthesia workstation, Draeger Medical (Telford, PA, U.S.), a manufacturer of auxiliary medical equipment, chose Victrex Peek polymer for the radial blower on the workstation’s ventilator component. It was chosen because of the material’s high strength and purity.

VICTREX PEEK polymer was chosen because of the material’s high strength and purity.
 

Medical device maker Draeger Medical found that VICTREX PEEK polymer, supplied by Victrex USA, suited the high strength and purity needed in a blower for its Zeus anesthesia workstation.
The electrically powered radial blower is central to the equipment’s new E-Vent Plus ventilation technology. Reaching speeds of up to 42,000 r/min in less than 200 msec, the blower checks and constantly ventilates the patient. To achieve this type of acceleration, the moment of inertia and the weight of the blower wheel need to be as low as possible. “The wheel must be strong enough to prevent its fins from bending due to the enormous centrifugal forces that occur at these speeds,” explains Andrew Ragan, Victrex global leader, Industrial. “High seam strength is also essential.”
 

To meet these requirements, Draeger Medical uses non-reinforced VICTREX PEEK polyaryletherketone from Victrex USA Inc. (Greenville, SC, U.S.) to injection mold the 2-in (55-mm) wheel, which has a wall thickness of just 0.012 in (0.3mm). The wheel has a tensile strength of approximately 14,500 psi (100 MPa) at a temperature of 74°F (23°C). It also has the purity required for clinical use.

From a production point of view, manufacturing the blower presented a number of challenges. The wheel is made in a tool with 23 slide bars in an injection molding process. It must form a homogeneous, partly crystalline structure. Special attention was given to the parting system and the geometric placement of the ejectors to maintain the tight tolerances required for high balancing quality and to minimize warping in the connection between the shaft and the hub. “Because semi-crystalline VICTREX PEEK can achieve maximum flow rates of up to 40 gal/min (150 l/min) with an excellent response dynamic, it does not require any more working gas,” says Mr. Ragan. “As a result, operating costs are considerably reduced.”

Related Articles

Plastics & Plastic Parts Plastic Triplets

 

Daily News

...........................................................

Sep 19, 2014: Builder confidence at highest level since Nov. 2005

Sep 19, 2014: Builders Show, Kitchen/Bath Show, and 3 other events converge for 2015 Design & Construction Week

Sep 19, 2014: GE Appliances supporting Susan G. Komen

Sep 18, 2014: AHRI at White House unveils $5 billion refrigerant R&D plan

Sep 18, 2014: Solar microinverter market could break $1 billion by 2018

More Daily News>>

RSS Feeds
.........................................................
Appliance Industry
Market Research

...........................................................

March 2014: Market Research - 62nd Annual U.S. Appliance Industry Forecast
February 2014: Appliance Magazine Market Insight: December 2013
January 2014: Market Research - Appliance Historical Statistical Review: 1954-2012
January 2014: Appliance Magazine Market Insight: November 2013




 
Contact Us | About Us | Subscriptions | Advertising | Home
UBM Canon © 2014  

Please visit these other UBM Canon sites

UBM Canon Corporate | Design News | Test & Measurement World | Packaging Digest | EDN | Qmed | Plastics Today | Powder Bulk Solids | Canon Trade Shows