iti 17 April 2025
Rubber Technician

ITI Rubber Technician Syllabus

Course Overview

  • Trade Name: Rubber Technician

  • Duration: 1 Year (2 Semesters)

  • NSQF Level: Level 4

  • Eligibility: 10th Grade Pass with Science and Mathematics

  • Objective: To train candidates in the processing, manufacturing, and testing of rubber products, preparing them for roles as rubber technicians, machine operators, or self-employment in rubber industries such as tire manufacturing, automotive parts, and polymer processing.

  • Certification: National Trade Certificate (NTC) by NCVT

Detailed Syllabus

Semester 1

Trade Theory

  • Introduction to Rubber Technology: Overview of rubber industry, natural vs. synthetic rubber, applications (tires, belts, seals).

  • Safety Practices: PPE (gloves, masks, safety shoes), chemical handling, fire safety, ventilation in rubber workshops.

  • Raw Materials: Types of rubber (NR, SBR, NBR), compounding ingredients (carbon black, sulfur, accelerators).

  • Rubber Properties: Elasticity, tensile strength, hardness, abrasion resistance; effect of compounding.

  • Mixing Processes: Open mill mixing, internal mixers (Banbury), compounding procedures.

  • Basic Machinery: Two-roll mills, kneaders, extruders; components, operation, and setup.

  • Vulcanization Basics: Principles of curing, sulfur vs. peroxide systems, curing time and temperature.

Trade Practical

  • Safety Drills: Wearing PPE, handling chemicals safely, practicing emergency evacuation.

  • Material Identification: Testing rubber samples for type (NR, SBR), checking filler content.

  • Mixing Practice: Operating two-roll mill, preparing rubber compounds with specified ingredients (±1% accuracy).

  • Machine Setup: Calibrating extruder feed rate, setting mill nip gap (±0.5 mm).

  • Vulcanization Tasks: Curing rubber samples in a press, monitoring time (5-15 min) and temperature (140-160°C).

  • Testing: Measuring hardness (Shore A), tensile strength using basic testers.

  • Project Work: Prepare and cure a 300x300 mm rubber sheet with specified hardness (60±5 Shore A).

Hours: Theory: 160 hours | Practical: 240 hours

Semester 2

Trade Theory

  • Advanced Processing: Molding (compression, injection), calendaring, continuous vulcanization.

  • Rubber Products: Tires, hoses, gaskets; design and manufacturing requirements.

  • Quality Control: Testing for elongation, tear strength, aging resistance; standards (ASTM, ISO).

  • Machinery Maintenance: Troubleshooting extruders, mold cleaning, hydraulic system checks.

  • Polymer Chemistry: Molecular structure of rubber, cross-linking, effect of additives.

  • Environmental Practices: Recycling rubber waste, reducing emissions, eco-friendly compounding.

  • Entrepreneurship: Starting a rubber product unit, market trends (e.g., green tires, medical rubber goods).

Trade Practical

  • Molding Operations: Producing rubber gaskets using compression molding, ensuring defect-free edges.

  • Calendaring: Operating calendaring machine to produce thin rubber sheets (±0.1 mm thickness).

  • Advanced Testing: Conducting tear strength and aging tests, comparing results with standards.

  • Machine Maintenance: Lubricating extruder screws, replacing worn seals, checking hydraulic pressure.

  • Recycling Tasks: Processing rubber scrap into reclaim, testing its usability.

  • Product Fabrication: Manufacturing a rubber hose (500 mm length) with specified diameter (±1 mm).

  • Project Work: Design and produce a molded rubber component (e.g., O-ring), meeting ASTM quality standards.

Hours: Theory: 160 hours | Practical: 240 hours

Additional Components

  • Workshop Calculation and Science

    • Calculations: Compound ratios, curing time, production rates, material cost estimation.

    • Science: Polymer elasticity, heat transfer in vulcanization, chemical bonding in curing.

    • Hours: 80 hours/year

  • Engineering Drawing

    • Drawings: Rubber mold designs, machine layouts, product cross-sections (e.g., tire tread).

    • Hours: 80 hours/year

  • Employability Skills

    • Communication: Documenting production logs, coordinating with quality teams, client interaction.

    • IT Literacy: Using rubber testing software, inventory systems, online material databases.

    • Soft Skills: Time management, teamwork, resume writing, interview preparation.

    • Hours: 60 hours/year

Assessment and Certification

  • Exams:

    • Theory: Written exams per semester (MCQs, descriptive questions).

    • Practical: Operating rubber machinery, producing samples, quality testing, maintenance tasks.

  • Evaluation Criteria: Product quality, process accuracy, safety compliance, testing proficiency.

  • Certification: NCVT National Trade Certificate (NTC), globally recognized.

Career Opportunities

  • Employment: Rubber technician, machine operator, or quality inspector in tire manufacturing, automotive parts, or polymer industries.

  • Self-Employment: Rubber product manufacturing unit, consultancy for rubber processing, recycling ventures.

  • Further Studies: Diploma in Polymer Technology, certifications in rubber compounding or tire technology.

Source: Based on NCVT guidelines and general ITI syllabus structure for Rubber Technician trade. For the latest syllabus, refer to the official DGT website (dgt.gov.in) or Bharat Skills (bharatskills.gov.in).

Trade Type

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