Micromolded Components

Accumold, Ankeny, IA, manufactures precision micromolded plastic components with part geometries from 5 cm to less than 1 mm in size.

The company offers processes including insert molding, cleanroom molding, and two-shot molding.

Cross-functional teams of designers and toolmakers work together to fabricate tools that are capable of producing production-ready parts, reducing the likelihood of multiple and costly design iterations and tool redesign.

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LSR Insert Molding

Aberdeen Technologies, Carol Stream, IL, provides insert molding of liquid silicone rubber (LSR). LSR insert molding enables very small guide wires down to 0.005 in. diameter to be held in a concentric position in a mold while LSR is injected carefully around them. Even tiny glass capillary tubes can be insert molded into housings that contain them in parallel layers. In cases like this, the outside surface of the tube often needs to be treated with a liquid primer to ensure a chemical bond between the glass and plastic. More recently, medical devices have been designed to actually mold LSR onto a thermoplastic base or structure.

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Mold Making Silicone

Shin-Etsu Silicones of America, Akron, OH, has released a new mold making series for 3D printing applications. The SES22251 series is a high tear strength, high modulus, platinum cure mold making silicone. Ideal for rapid prototype houses across various industries including medical, the series exhibits excellent tear resistance including undercuts, low shrinkage, low viscosity, and easy release, making it a suitable mold making material. The base silicone can be mixed with four flexible Shore-A Hardness catalyst options (CAT22251-40/35/30/20) to achieve an optimal hardness.

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RIM Capabilities

Reaction injection molding (RIM) services are available from Exothermic, Kenilworth, NJ.

Polymer parts created via RIM are typically known for being lightweight and flexible.

These products are stable and flexible as well as strong, tough and durable, capable of resisting impact and wear. In addition, RIM parts are non-corrosive and chemically resistant.

The company has expanded its RIM manufacturing process expertise with Materia’s Proxima® thermoset resins, which is exceptionally strong, works at high temperatures, and leaves no sink marks.

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Medical Design Briefs Magazine

This article first appeared in the July, 2020 issue of Medical Design Briefs Magazine.

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