PRESENTATION ON RESIN TRANSFER MOLDING(RTM) Presented By: Sarpate chandraparakash S. 2008AMD 2932 Dept. of Applied Mechanics, IIT Delhi

CONTENTS  History  Resin Transfer molding set up and description  Advantages  Disadvantages  Type of material for which process is used  Properties of the material which affect by RTM process  Applications of resin transfer molding

HISTORY  developed by a US navy contract for the development of 28-ft long personal boat in 1946  Harold John Pollard and John Rees in between 1952 – 1956  plant for fibers and asbestos  fully developed for general aerospace applications in the 1980s Types :- LCM,RIM,SRIM,RRIM,RTM

RTM SET UP [Image courtesy:-(1)]

STEPS IN RTM PROCESS [image courtesy:-

Typical Preform Fiber Weaves  Polyester resins  Epoxy resins  Phenolic resins and other thermo set resins  Type of material for which process is used [image courtesy:-

Advantages  Design Flexibility  Faster Production  Labor Savings  Dimensional Tolerances  Surface Finish  Lower Material Wastage  Very large and complex shapes can be made efficiently

Disadvantages  Greater Tooling Design and Construction Skills Required  Higher Tool Cost  Reinforcement loading may be difficult with complex parts  Mold design is complex

Properties of the material which affect by RTM process  Density  Strength  Notched and Unnotched lzod Impact Strength increases

Applications Wing Panel Truck pannel Aerospace parts  boat hulls  wind turbine blades  aircraft radar.  helmet, bathroom fixtures, car body etc

References Applications of Resin Transfer Molding Roger Rowell1 and Jane O ’ Dell R. K. Basak and M. Sarkar] 4[The early history of the resin transfer moldings process by K.D. Potter Aerospace Engineering Department, University of Bristol, Queen ’ s Building, University Walk, Bristol BS8 1TR, UK] 2. /