MPMN_Medical Product Manufacturing News

Medical Product Manufacturing News, November/December 2015

Issue link:

Contents of this Issue


Page 15 of 27

M E D I C A L P R O D U C T M A N U F A C T U R I N G N E W S Q M E D . C O M / M P M N 1 6 N O V E M B E R / D E C E M B E R 2 0 1 5 TOP PRODUCTS &SERVICES: 2015 A Heat Shrink to Simplify Catheter Manufacturing FluoroPEELZ is a fluoropolymer heat shrink from Zeus (Orangeburg, SC) that operators can easily peel rather than cut off from the catheter shaft after the reflow heating process in which the inner layers of the catheter are combined. Launched in February 2015 at MD&M West, FluoroPEELZ's advantages include reducing scrap, improving yields, and increasing worker safety—while decreasing the need for training, according to Zeus. Says the company: "Catheter construction is a delicate and costly process that leaves no room for error. The last step of removing the recovered FEP heat shrink over the outer shaft is often the most critical and laborious. One imperfection and the product goes to scrap, costing the manufacturer time and money." MTD Micro Molding (Charlton, MA) can mold multiple micro components together at once. This technology, launched in late 2014, can improve medical device companies' drug-delivery cannulas. Traditional manufacturing methods for the development of cannulas have used the heat-forming process of converting fluoropolymer extrusions to cannulas. Next-generation products could follow the new advances that MTD is enabling by instead using polypropylene for cannula products. In terms of technical execution, it is difficult to make a long, thin, straight part such as a cannula. The challenge lies in the fact that for a 0.005-in. wall thickness to flow long-distance, a tiny, delicate core pin must be centered precisely in the cavity. With long length of thin flow, it is impossible to fill an annular ring if material flow becomes uneven. When flow becomes unbalanced, a hydraulic effect is created on one side and pushes the core pin, which produces an ultra-thin wall on the opposite side. This, in turn, causes fill problems and distortion. Precise control over the position of the core is critical, which is why highly capable tooling and molding machines are required to successfully mold a thin-walled cannula for drug delivery. This control makes molding walls as thin as 0.03 mm possible at MTD. Molding an Array of Micro Medical Components A Faster, More Affordable Welder for Tiny Medical Device Parts Released in January 2015, Sunstone Engineering's Orion 200i2 micro TIG (pulse arc) welder is able to control a wide range of power in order to permanently fuse together metal as fine as a piece of hair or as larger as most medical tools and instruments. It utilizes argon gas and a tungsten electrode to produce a plasma arc that fuses small metal parts of all metal types together. Sunstone (Payson, UT) boasts the Orion is a much faster and affordable option compared to laser welding. Other Orion 200i2 features include an interactive touch screen interface, a space-saving design, and monitoring features to ensure the machine produce a consistent weld every time. Different modes allow the power to release in specific ways depending on what the desired outcome is.

Articles in this issue

Links on this page

Archives of this issue

view archives of MPMN_Medical Product Manufacturing News - Medical Product Manufacturing News, November/December 2015