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Case Study

Minrad

RIM Chosen Over Injection Molding
For Medical Device

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Minrad, Inc., the maker of a laser targeting system for many fluoroscopic procedures, wanted to insure the system’s appearance was as high tech as the advanced capabilities of its technology. In reviewing RIM and the options for plastic molding, they turned to Exothermic Molding, Inc. when it was apparent that RIM offered the best solutions for housing the system. The solid polyurethane RIM system with a UL94 V-0 flammability rating was excellent for thin-wall molding and offered strength, surface finish, large part capabilities and durability, while maintaining its lightweight and high tech appearance. The design for RIM was by HS Design (Gladstone, NJ).

minrad-rectangular

Another advantage was of significant cost savings made possible by the use of low cost family molds. The components consisted of five molded parts. Exothermic Molding, through their extensive experience in mold design and manufacturing, faced the challenge at hand with family molding and produced the 5 different molded parts from only two molds. One mold was designed with four cavities and three different mold blocks to house three separate configurations, in order to accommodate its use with different types of existing fluoroscopes. The battery charger and cover were grouped together in the second mold. This efficient method of family molding allowed Exothermic Molding to yield 250 parts per day on two presses.

RIM is well suited for various applications in the medical, electronic, automotive and other various markets

minrad-rim-process

 

The benefits of reaction injection molding include:

  • Large, sculpted parts can be molded economically.

  • Variable thickness walls within the same mold allow for greater design freedom.

  • Wall thickness may range from .125 to 1.125 inches.

  • Closed molds produce accurately molded and structurally strong parts.

  • Lower tooling cost and shorter tooling lead time.

  • A wide variety of material properties including UL94VO.

  • Electronic components, metal parts, glass and other materials are easily encapsulated.

  • RIM parts are lower cost than the same parts made from metal or fiberglass.

  • Compared to fiberglass, RIM parts have improved repeatability.

  • Composites - RIM parts can be reinforced with many materials.

Exothermic Molding capabilities:

  • CAD Engineering Review

  • Mold Design

  • Mold Manufacture

  • Mold Repair/ Modification

  • RIM Molding

  • Precision Painting

  • Silk Screening

  • Assembly