Mold making for composite tensile test

This innovation mostly on simple shape composite mold, with one-piece molds made from nylon plastic. During this mold fabrication, consideration given to use the recyclable materials but yet provides durability. High flow rates of thermoplastic or thermoset resin are considered as the main medium to be cured in the mold along with the fibres. These high flow rates may interfere with the casting process and result in a non-uniform cast layer thickness along the part. Therefore, the mold or die design is an important part and is closely related to possible problems of the heat treatments and dimensional accuracy. Regions with abrupt variation in the cross-section and sharp corners are points that can lead to cracks or warpage during heating and mainly during quenching. Rough machining marks can act as notch and cause fracture of the mold or die during the heat treatment. The initial idea was innovate using CAD program to simulate the exact dimension following the ASTM D3039 (Standard Test Method for Tensile Properties of Polymer Matrix Composite Materials). The most common specimen for ASTM D3039 is a constant rectangular cross section. These molds are machined using CNC, laser cutting and grinding. This mold or die may act as an educational aid apparatus in preparing samples of composites for tensile test.