Molding Tiny, Complex Bioabsorbable Parts

Designed and patented by Medical Murray, the Sesame™ injection molding machine offers unique advantages for molding bioabsorbable polymers and creating very small, complex medical devices.

March 14, 2012 — North Barrington, IL ─ Designed and patented by Medical Murray, the Sesame™ injection molding machine offers unique advantages for molding bioabsorbable polymers and creating very small, complex medical devices.

The Sesame is designed to provide fast, controlled injection and short material residence time. It uses a pneumatically-driven vertical plunger for plasticating and injects with a tiny horizontal plunger (1 to 2.5 mm diameter) driven by a linear servo motor. Total injection time can be as short as 0.02 seconds. Its features include very low melted volume, and controlled high speed and high pressure injection. This allow for the molding of sub micro-sized parts with complex geometric features from materials such as bioabsorbable polymers that would otherwise degrade in standard equipment. 

Medical Murray has successfully developed processes and designs for creating miniature hinges in molded devices for bioabsorbable fasteners that are activated during placement. Parts have been produced on the Sesame measuring just 0.10 mm and weighing only 2.5 mg, or one-twentieth of a single pellet.

Those that are capable of molding such small parts commonly observe sprue and runner systems amounting to 75 percent or more of the volume needed to produce one part. Medical grades of bioabsorbable resins can sell for upwards of $1500 per pound, therefore scrap material must be tightly controlled to minimize the effect on the bottom line. 

To view the Sesame nano-molding machine and Medical Murray’s complete range of services, please visit our Website at: www.medicalmurray.com, or contact us at: info@medicalmurray.com for our complete literature package.

 

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About Medical Murray

Founded in 1996, Medical Murray is a leading designer, developer, and manufacturer of unique complex catheter systems, permanent implants, and bioabsorbables for less invasive vascular, urologic, and surgical applications. We specialize in designs requiring multi-layer/multi-lumen catheters and shafts, to integration of various materials, temperatures, and pressure sensors. Our nano-molding capabilities feature patented molding technology of parts weighing less than 1 gram. We also offer contract manufacturing facilities featuring four ISO 13485 class 7 clean rooms, and FDA registration to handle full sterilization, packaging, and final distribution needs. Our company headquarters are located in Barrington, IL.