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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

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