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CCT- Light Resin Transfer Molding (LRTM)

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The need to constantly improve quality, increase productivity, reduce emissions, decrease operational costs, and produce precision parts is placing considerable pressures on the composites manufacturer.

The intermediate closed molding processes: Vacuum Infusion Processing (VIP) and Resin Transfer Molding (RTM) that were developed more than five decades ago have remained in the background until the recent development of improved engineering systems and materials. Light Resin Transfer Molding (LRTM), a variation of the vacuum infusion process, appeared about 10 years ago as mold flexible counter molds were developed, along with improved materials and equipment.

These closed molding processes are changing the industry. To survive and thrive will require adjusting shop processes and acquiring new skills. Through the use of step-by-step procedures and interpretative pictures and graphics, this newest curriculum has been designed to provide the knowledge and understanding of the latest technologies necessary to successfully adapt these processes.

As a candidate for the CCT-LRTM, one can expect to see the following subject matters addressed in the study materials, as well as the certification examination.

Program Overview - Light Resin Transfer Molding (LRTM)

  • Basic Composites
  • General Composites Knowledge
    • Composites Overview
    • The Composites Industry
    • What are Composites?
    • Why Composites are Different
    • The Advantages of Composites
    • History of the Composites Industry
  • Composites Manufacturing Processes
    • Overview
    • Open Molding
    • Closed Molding
    • Cast Polymer Molding
  • Composites Materials
    • The Polymer Matrix
    • Thermoset Resins
    • Overview of Polyester Resins
    • Initiators, Promoters, and Inhibitors
    • Resin Additives
    • Gel Coat
    • Reinforcement Materials
    • Core Materials
  • Quality Control and Troubleshooting
    • The Approach to Quality
    • Quality Assurance System vs. Quality Control Program
    • Quality Terminology
    • Management Roles in Quality
    • Building a Quality System
    • Procedural Quality Control
  • Composites Plant Safety
    • Introduction to Shop Safety
    • Chemical Safety
    • Fire Prevention and Safety
    • Fluid Handling Equipment Safety
    • Electrical Safety
    • Power Tool Safety
    • Compressed Air Safety
    • Lock-Out/Tag-Out Procedures
    • Lift Truck Safety
    • General Personal Safety
    • Housekeeping and Safety
    • Confined Space Entry
    • Emergency Response Plan (ERP)
    • Respiratory Protection Program

Light Resin Transfer Molding

  • Introduction to Light RTM
    • Historical Perspective
    • Understanding LRTM
    • Light RTM Products
  • Process and Production
    • Overview
    • Darcy’s Law
    • The LRTM Process
    • LRTM Production Cycle
  • Tooling and Equipment
    • Design for LRTM
    • LRTM Tooling
    • Standard and Accessory Fittings
    • Vacuum Pumps
    • Section 5: The Vacuum System
    • Section 6: Mix and Metering Delivery
  • Materials
    • Materials Overview
    • Reinforcements
    • Resins
    • Curing Agents
    • Fillers
    • Core Materials and Laminate Bulkers
  • Gel Coat Application
    • Introduction to Gel Coating Technology
    • Gel Coating Safety
    • Gel Coat Storage and Handling
    • Raw Material Quality Assurance
    • Overview of Spray Gun Set-Up
    • Gel Coat Application Methods
    • Pre-Gel Coat Checklist
    • Spraying Techniques
    • Gel Coating for LRTM
  • LRTM Troubleshooting
    • Overview
    • Quality Methods for LRTM
    • Troubleshooting