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BITS Pilani K K Birla Goa Campus
Testing for Rotational Moulding (RM) and Service Capabilities of BITS
Dr. Sachin Waigaonkar
BITS Pilani, K K Birla Goa Campus
About BITS Pilani
Different Quality Tests in Rotational Moulding
Service Capabilities for Rotational Moulding
Industry.
Conclusions
Outline
BITS Pilani, K K Birla Goa Campus
BITS Pilani-Four Accredited Campuses
Pilani Campus (1964)
Goa Campus(2004) Hyderabad Campus(2008)
Dubai Campus (2000)
BITS Pilani, K K Birla Goa Campus
Theory learnt in classroom
Practice in Industry
Committed to University Industry Collaboration Since its inception (1964)
As on today, Collaboration with 300+ industries
University Industry Linkage
Practice School Programmes
BITS Pilani, K K Birla Goa Campus
Work-Integrated Learning and Collaborative Programmes
University Industry Linkage
[20,000 students on roll | 30,000 students graduated] 33 Organizations | 24 Degree Programmes
BITS Pilani, K K Birla Goa Campus
Testing of Raw Materials:
Testing of Pellets and
Testing of Powder
Testing of Product.( Fit, Form and Function)
Long Term Testing of RM Products.
Advanced Tests for Material Development
Testing in Rotational Moulding
BITS Pilani, K K Birla Goa Campus
Density
Melt Flow Index (MFI)
Shape, Size Colour of Pellets
Tensile Strength / Modulus
Flexural Modulus
Heat Distortion Temperature (HDT)
Environmental Stress Cracking
Resistance (ESCR)
Testing of Raw Material (Pellets):
BITS Pilani, K K Birla Goa Campus
Dry Flow Test
Bulk Density Test
Sieve Analysis - Particle Size Distribution
Microscopic View for Characterization of
Powder.
Powder Characterization
BITS Pilani, K K Birla Goa Campus
Dimensions of Product
Profile
Angularity
Depth
Wall Thickness Distribution
Shrinkage and Warpage
Testing of form features of the product:
BITS Pilani, K K Birla Goa Campus
Density of part
Tensile Strength and Modulus
Flexural Strength and Modulus
Low Temperature Impact Strength
HDT
ESCR
Gel Cure Test (XLPE), etc.
Mechanical Properties of the product:
BITS Pilani, K K Birla Goa Campus
Colour Testing in Light booth
Weatherability using Xenon Arc Lamp
Differential Scanning Calorimetry (DSC)
Dynamic Mechanical Testing Creep Testing using DMA
Thermal Gravimetric Analysis (TGA)
Scanning Electron Microscopy (SEM)
Compounding Studies using Torque Rheometer.
Rheological Studies using Parallel Plate rheometry
A few important tests are discussed here
Long Term and Advanced Testing
BITS Pilani, K K Birla Goa Campus
The specific gravity or density is a property
measured to:
Identify a material,
Follow physical changes in a sample,
Indicate degree of uniformity among different
sampling units or specimens.
To calculate strength-weight and cost-weight ratios.
Density
BITS Pilani, K K Birla Goa Campus
Effect of Density on Different Properties #
Density
Property
Tensile Strength HDT Stiffness Shrinkage Hardness Barrier
Properties Chemical
Resistance
Impact Strength
ESCR Optical
Properties Ductility
#: Ref: R.J. Crawford, Rotational Moulding, Rapra Review Report, 71
BITS Pilani, K K Birla Goa Campus
Testing of Density
Ref: ASTM D-792 or ISO 1183 method D.
BITS Pilani, K K Birla Goa Campus
Testing of Powder: Dry Flow and Bulk Density
Ref: Association of Rotational Molders, Test Method for Flowability and Apparent Density of Polyethylene Powders, Version 2.1 November 2011, pp-2-8, ASTM 1895-69 with conditions redefined for use in rotational moulding
BITS Pilani, K K Birla Goa Campus
Melt Flow Index (MFI)
Schematic Dynisco MFI in Our Lab
Ref: ASTM D -1238
BITS Pilani, K K Birla Goa Campus
Effect of MFI on Different Properties #
MFI
Property
Flow Properties e.g. Viscosity
Impact Strength Tensile Strength ESCR Weatheribility Chemical
Resistance Ductility
#: Ref: R.J. Crawford, Rotational Moulding, Rapra Review Report, 71
BITS Pilani, K K Birla Goa Campus
ESCR
Ref: ASTM D-1693
BITS Pilani, K K Birla Goa Campus
Testing of Tensile Properties
UTM in Lab (Load Cell 0-10 KN) Typical Stress-Strain Plot
Ref: ASTM D 638
BITS Pilani, K K Birla Goa Campus
Testing of Flexural Properties
Schematic of Flexural Testing Lab Testing Set Up
Ref: ASTM D 790
BITS Pilani, K K Birla Goa Campus
Typical Flexural Curves
Ref: ASTM D 790
BITS Pilani, K K Birla Goa Campus
Schematic of Low Temp. Impact Test
Ref: ARM Low Temperature Impact Test
BITS Pilani, K K Birla Goa Campus
HDT: Schematic and Set Up
Schematic of Flexural Testing Lab Set Up for HDT
Ref: ASTM D 648
BITS Pilani, K K Birla Goa Campus
Geometry and Form Testing: Coordinate
Measuring Machine (CMM)
Testing of product for Dimensions, Profile, Depth, Angularity, etc.
BITS Pilani, K K Birla Goa Campus
Dynamic Mechanical Analyzer (DMA): TA Instruments USA
Differential Scanning Calorimetry (DSC).
Thermo gravimetric Analysis (TGA)
Scanning Electron Microscope
Templogger
Injection Moulding Machine: Ferromatic Millerkon -50 T
Compression Moulding Press-32 T
3-D printer for Rapid Prototyping: Make Stratasys
ROTOSIM.
Pro-E, ANSYS and other CAE tools.
Other Facilities at BITS GOA ( will be replaced with Photos)
BITS Pilani, K K Birla Goa Campus
Test Standard
Density ASTM D 1505/D-4883/D-792 or ISO 1183 method D.
Dry Flow and Bulk Density ASTM 1895-69 with conditions redefined for use in rotational moulding
MFI ASTM D -1238
ESCR ASTM D-1693
Tensile Strength and Modulus ASTM D 638 Type I to IV
Flexural Strength and Modulus ASTM D 790
Low Temperature Dart Impact ARM International
HDT ASTM D 648
Conclusion: Our Service Capabilities
BITS Pilani, K K Birla Goa Campus
The best Research will give the best Teaching and the best Teaching will give the best Research Dr. APJ Abdul Kalam.
Thanks