Subject Code & Name: PT25404 – Plastics Moulds and Dies Technology
Regulation: R-2025
Semester: IV (Fourth Semester)
Branch: B.Tech. Plastics Technology (Plastics)
Credits / L-T-P: 3 Credits | L-T-P: 3-0-0
Course Objectives
- To impart knowledge on Various Molds types, Mold making and Material of mold selection.
- To impart knowledge on Elements of the mould and manufacturing processes.
- To impart knowledge on Application of additive manufacturing in mould development To impart knowledge on Advanced measuring instruments for inspection of mold.
Full Unit-wise Syllabus
Unit I – Injection Mould Design
Introduction to injection moulds- mould parts its factions and classification sprue bush – Locating ring – Guide pillar & bush – Integer & Insert bluster type core & cavity – Bolsters – Inserts – Mould Clamping Assembly of Moulds – Shrinkage consideration for Core & Cavities – Design requirement for quality moudlings plate moulds – Mould Plates - CAD/CAM applications in mould design - materials used in mould making – Requirements of mould material – Ferrous and Non ferrous materials used in injection moulds – Heat treatment requirements for mould materials. Parting line – Parting surface – type of parting surfaces – mould relieving – Mould Venting – Criteria’s for selection of injection moulding machine – Clamping force – Shot Weight – Shot Capacity – Day light distance – Projected area – Injection pressure – Distance between tie bars - Calculation of no. of impressions for a mould – Standard Mould base – Advantages & Limitations – Manufacturers of standard mould bases – Standard mould parts – Selection of mould base and accessories.
Activities: Study of Injection Mould for a Plastic Component.
Unit II – Design of Feed Ejection and Cooling Systems
Feed System: Sprue, runner and gates – Cross Section and Size of runner – runner types & runner efficiency – rubber layout – balancing of runners – types of gates – gate balancing – Empirical formulae for runner and gate. Ejector System: Ejection system major division – Ejector grid – its types – Ejector plate assembly – Ejector assembly return system – Stop button – types of ejection – sprue pullers- Calculation of rejection force – ejection stroke – Calculation of support pillar requirements – Mould temperature control system – Mould cooling – Cooling Integer type cavity and core plates – Cooling of bolsters – Cooling of cavity inserts – Cooling of core inserts – O ring, Heat Pipe and Heat rods – Adaptors and Plugs for cooling circuits – Calculation of Cooling efficiency – Introduction to confirmal cooling.
Activities: Study of how plastic flows, solidifies, and is ejected by designing the three critical mould systems.
Unit III – Design of Compression and Transfer Moulds
Introduction to compression moulds – Open Hash, Semi Positive, Positive and Displacement moulds – Types of loading chambers – Bulk factor – Flash Thickness – Projected area – Compression Pressure – Clamping Force – No. of impressions by technological method – Heating System – Types of Heaters – Heat Requirement – Heat Loss – heater capacity – Loading Chamber design – Mould Material Transfer Mould – Its types – integral pot transfer mould, auxiliary ram – transfer pot design – Projected area – transfer pressure – Clamping force – Pressure Pad design – Design of Sprue, runner and gate for transfer mould – Advantages and disadvantages of transfer mould – transfer Pot and Plunger Calculations – Mould material.
Activities: Study on design of Compression and Transfer Moulds.
Unit IV – Design of Blow Moulds & Extrusion Dies
Blow mould Design – Material for blow mould- types of blow moulds – Blow ratio – parison – Parison Programming – Blow Moulded Container Terminology – Panch off design – mould alignment – mould venting – mould cooling – Priform extrusion die design – Principles of extrusion – Extruder die geometry – Die material – Die Swell – Die Land design – sizing equipment, screen peak and breaker plates – Construction of extrusion dies – Dies for rod – Dies for Pipe – Dies for blown film – Dies for flat film – dies for profile – dies for wires cables – Die mandrel – Spider – Plastic Materials used for extrusion – Mel flow index – Co extrusion dies.
Activities: Understand and design tooling used in blow and extrusion processes by creating basic mould and die layouts for simple plastic products.
Unit V – Advanced Injection Mould Design & Mould Maintenance
Introduction to Design of mould, Care and Maintenance - Working Principle and Construction – Principles and rule of design for mould – Engineering and design procedure – Dimension and mould drawings – Mould stamping – Causes of wear and damage – Preventive maintenance of moulds
Activities: Understand and Develop advanced skills in mould design (multi-cavity, hot runner, complex geometries) and understand practical maintenance techniques to improve mould life and product quality.
Course Outcomes (COs)
- CO1: Explain the principles of mould tools, mould materials, and mould manufacturing processes used in plastic product fabrication.
- CO2: Apply the knowledge of different mould types and mould design considerations for selecting suitable moulds in plastic processing applications.
- CO3: Analyze and evaluate mould quality using advanced measuring and inspection equipment to ensure precision, productivity, and product quality.
Assessment Pattern (Quick Note)
- Weightage: Continuous Assessment 40% | End Semester Examinations 60%
- Internal methodology: Assessment I (35%), Assessment II (35%), Activities (30%)
Source: Official Anna University – B.Tech. Plastics Technology R-2025 Syllabus
Last Updated: October 2026
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