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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