NDH Medical - Processes and Medical Device
This section of the NDH Medical web site contains information about plastics, manufacturing processes, and medical device information. Materials are constantly being added, so you are encouraged to visit often. Links to other valuable reference sites are provided for ease of access.
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Product Details
Welcome to the NDH Medical, Inc. online resource center. This site is composed of three primary sections. The COMPANY section contains background information about NDH Medical and its products and services. The COMMERCE section provides information about sales contacts, literature, and quotation requests. The REFERENCE section provides interesting and valuable data about plastics and medical devices and a list of related sites. We hope you enjoy your visit and return soon.
NDH Medical, Inc. is a contract medical device manufacturer specializing in custom extrusion of single-lumen, paratubing, multi-lumen, coextruded tubing, taper (bump) tubing, braid reinforced tubing, and wire/coil jacketing. Insert molding, injection molding, pad printing, assembly, and other services are provided in our facilities as is in-house tooling design and fabrication.
NDH Medical exhibits at the key medical device manufacturing trade shows. For a schedule of the location nearest you, please click here.
The Extrusion Process Explained
Extrusion is a continuous process by which the extruder mixes, melts, and meters the plastic. The melted plastic is then pumped through the desired shape die. Once the formed extrudate leaves the die it is cooled and supported by the waterbath. The haul-off equipment pulls the extrudate through the bath. Upon exiting the bath, the plastic piece is solid and can be cut or spooled.
The Injection Molding Process
Thermoplastic injection molding is a process, which uses temperature, high pressures, and speeds to create three-dimensional plastic parts. The polymer is melted using a reciprocating screw inside a hot barrel. A shot (a volume of melted plastic) is built-up, the screw stops rotating, the mold (typically steel) is closed, and the shot is pushed into the mold. The screw stays forward until the gate solidifies and then another shot is created. Once the part cools, the mold opens, and the part is ejected. The cycle repeats.
Examples of products created by this process are computer housings, luer fittings, car panels, pen housings, milk crates, and many others.
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