Textile Dry Process Product Changeover Procedure Training

Objectives:
• Understand the textile dry process workflow and its key stages.
• Define product changeover and its importance in textile manufacturing.
• Identify safety, quality, and efficiency considerations for changeovers.
• Recognise the role of standard operating procedures in changeover management.

Topics:
• Overview of textile dry processes: opening, blending, carding, drawing, roving, spinning.
• What is product changeover? Scope and impact on production.
• Key performance indicators: downtime, waste, quality defects.
• Safety fundamentals: lockout/tagout, PPE, machine guarding.
• Introduction to changeover documentation and standard operating procedures.

Objectives:
• Explain the purpose and outcomes of Unit Standard 116323.
• Describe the NQF level and credits associated with the standard.
• Identify relevant legislation: OHS Act, SANS codes, company policies.
• Relate the unit standard to job roles and responsibilities in textile operations.

Topics:
• Breakdown of Unit Standard 116323: specific outcomes, assessment criteria.
• NQF level 4: skills and knowledge requirements.
• Legal compliance: OHS Act 85 of 1993, environmental regulations.
• Company-specific policies and procedures for changeover.
• Roles of operators, supervisors, and quality control personnel.

Objectives:
• Identify blowroom and carding machine components relevant to changeover.
• Perform step-by-step changeover for blowroom lines.
• Execute carding machine changeover with focus on settings and cleaning.
• Apply quality checks after changeover to ensure product consistency.

Topics:
• Blowroom setup: bale opener, cleaner, mixer settings.
• Carding machine: settings for different fibre types and counts.
• Changeover steps: stopping, cleaning, adjusting, restarting.
• Cleaning procedures: removal of residual fibres, dust control.
• Quality verification: sliver uniformity, nep count, trash content.

Objectives:
• Describe the function of drawing and roving frames in the dry process.
• Execute changeover procedures for drawing frames (breaker and finisher).
• Perform roving frame changeover including bobbin and drafting settings.
• Troubleshoot common changeover issues in drawing and roving.

Topics:
• Drawing frame: roller settings, draft ratios, creel configuration.
• Roving frame: flyer speed, twist, bobbin build parameters.
• Changeover steps: cleaning roller laps, replacing cots and aprons.
• Adjusting for different fibre blends and linear densities.
• Common defects: uneven sliver, roving breaks, and corrective actions.

Objectives:
• Understand ring and compact spinning principles for changeover.
• Perform spindle preparation, traveler changes, and ring rail adjustments.
• Set twist, spindle speed, and drafting parameters for new product.
• Conduct quality checks: yarn strength, evenness, hairiness.

Topics:
• Ring spinning frame components: spindles, rings, travelers, drafting system.
• Compact spinning: suction inserts, perforated drums.
• Changeover steps: doffing, cleaning, traveler ring conditioning.
• Parameter adjustments: twist multiplier, draft ratio, spindle speed.
• Quality control: Uster statistics, yarn appearance grading.

Objectives:
• Identify winding machine types (automatic, manual) and their changeover needs.
• Execute changeover for package size, density, and winding pattern.
• Adjust tension, speed, and yarn clearer settings.
• Apply splicing and knotting techniques for different yarn types.

Topics:
• Winding machine setup: cone, cheese, dye package configurations.
• Changeover steps: tube change, tensioner adjustment, clearer calibration.
• Yarn clearer settings: capacitance or optical, threshold for faults.
• Splicing vs. knotting: selection criteria and procedure.
• Quality checks: package hardness, yarn breakage rate, fault removal.

Objectives:
• Understand the role of quality assurance in changeover.
• Conduct sampling at each process stage after changeover.
• Perform basic physical tests: linear density, twist, strength, evenness.
• Interpret test results and make adjustments to meet specifications.

Topics:
• Sampling plan: frequency, location, sample size.
• Testing: count (Nm/Ne), twist per inch, tensile strength, evenness (CV%).
• Using laboratory instruments: wrap reel, twist tester, tensile tester.
• Statistical process control: control charts, capability indices.
• Corrective actions: adjusting machine settings based on test data.

Objectives:
• Identify sources of waste during changeover: fibre, yarn, packaging.
• Implement waste reduction strategies: minimising start-up waste.
• Segregate and dispose of waste according to environmental regulations.
• Apply lean principles to reduce changeover time and waste.

Topics:
• Waste types: hard waste, soft waste, contaminated material.
• Waste reduction techniques: optimised cleaning, use of waste collection systems.
• Environmental compliance: waste management plan, recycling options.
• Lean manufacturing: SMED (Single-Minute Exchange of Die) principles.
• Recording and reporting waste quantities for continuous improvement.

Objectives:
• Develop a changeover plan considering production schedule and resources.
• Coordinate with maintenance, quality, and production teams.
• Use checklists and standard work instructions to ensure consistency.
• Monitor changeover performance using key metrics.

Topics:
• Changeover planning: sequence, resource allocation, time estimation.
• Communication: shift handover, production meetings, work orders.
• Standard work: visual aids, job aids, checklists.
• Metrics: changeover time, first-pass yield, defect rate.
• Continuous improvement: root cause analysis of changeover delays.

Objectives:
• Identify common problems encountered during changeover.
• Apply systematic troubleshooting methods: 5 Whys, fishbone diagram.
• Resolve machine-specific issues: settings, mechanical faults, quality deviations.
• Document problems and solutions for future reference.

Topics:
• Common issues: improper settings, contamination, mechanical failures.
• Troubleshooting methodology: observe, analyse, test, correct.
• Case studies: blowroom blockages, carding web breaks, spinning ends down.
• Root cause analysis tools: fishbone diagram, fault tree analysis.
• Documentation: problem log, corrective action report.

Objectives:
• Apply all learned procedures in a simulated changeover scenario.
• Practice changeover from start to finish under time constraints.
• Demonstrate teamwork and communication during changeover.
• Evaluate performance against standards and identify improvement areas.

Topics:
• Scenario: change from product A to product B (different fibre or count).
• Team roles: operator, quality checker, supervisor.
• Execution: planning, cleaning, setting, sampling, testing.
• Time management: target changeover duration.
• Debrief: review successes, challenges, and lessons learned.

Objectives:
• Complete formative and summative assessments as per Unit Standard 116323.
• Demonstrate competence in all required outcomes.
• Develop a personal action plan for continuous improvement in changeover.
• Understand the certification process and future learning pathways.

Topics:
• Assessment: theory test, practical demonstration, portfolio of evidence.
• Feedback: areas of strength and areas for development.
• Certification: SAQA-aligned certificate issuance.
• Continuous improvement: Kaizen, PDCA cycle.
• Career pathways: advanced textile qualifications, supervisory roles.