Progress Report: Week 2February 16, 2006

Manotech AssociatesJina KimForrest LiauDavid LinTeresa Wang

Product Proposal

Customized prosthetic hand

The “Manotech Approach” Low-cost, self do-it kit

Consumer ease Reversible mold

Innovative process

Progress Overview

Components of Focus Underlayer Mold

Justification More fundamental parts for shape and function

Work Interviews Development of component material specifications Materials research

Interview 1: Dr. Samuel Koo

BU Dental

Phone interview with Forrest

Recommended dental mold materials Polyether

Gives more detailed mold Silicon addition

Less accurate

Interview 2: Professor Roylance Associate Professor of Materials

Engineering, MIT

Personal interview with Jina and David on 2.10.06

Recommendations on mold materials Room temperature vulcanization

(RTV) Silicones and urethanes

Material Specifications:Underlayer & Mold

Price < $20 total for simple function, cosmetic appeal

Solidification at Room Temperature Conformability Flexibility of material

Underlayer: to accommodate prosthetic function Mold: to allow reversal

Compatible with other materials in prosthetic

Mold Materials

Company Product Specifications

US Composites74-30 RTV Liquid Urethane Mold Rubber

Hardness, Shore A: 30

Demold time: 24 hours

Soft, stretchable

TAP PlasticsUrethane RTV Mold-Making System

Hardness, Shore A: 30

Cure time: 24 hours

Tear-resistant, good for detail

Polycast RTV-885 Silicone

Hardness, Shore A: 20

High strength, low viscosity, good for complex patterns

Underlayer Materials - Silicone Rubber Properties

Low shrinkage, high strength Hardness, flexibility

Company Product Cure time

Cure temp

Price

(per 2 lbs)

Nicolas Sarra Po Yo Putty 30/40> 7 min.

23 deg C26.00

Nicolas Sarra Equinox 25/35 Fast7 min.

23 deg C34.30

Polytek Development Corp.

PlatSil Gel-1030 min.

25 deg C45.00

Specialty Silicone Products

SSP-2246 115 deg C Free sample

Future Work

More Interviews Local make-up artists Michael Rubner, Paula Hammond

Materials Testing Try out idea of a “reversible mold” Underlayer flexibility, using toy endoskeleton

Visit Our Website

http://web.mit.edu/3.042/team2_06/Welcome.html

More Information

Our Website:http://web.mit.edu/3.042/team2_06/Welcome.html