PL8601 - PLASTICS MOULDS AND DIES DESIGN (Syllabus) 2017-regulation Anna University

PL8601 - PLASTICS MOULDS AND DIES DESIGN (Syllabus) 2017-regulation Anna University

PL8601	PLASTICS MOULDS AND DIES DESIGN	LPTC

3003

OBJECTIVES:

• To learn the design concepts for various mould elements.
• To learn the basic design aspects related to Injection Mould , Compression Mould, Transfer Mould, Blow Mould and Extrusion Dies.

UNIT I	BASICS OF MOULD DESIGN & INJECTION MOULDS	13

Mould Design: Introduction to Molding process and Moulds – Classification of moulds- Factors considered for Mould Design-Shot Capacity-Plasticizing Rate-Clamping Force- Injection Time – Cooling Time - Number of Cavities –Layout of Cavities. Injection moulds: Classification - Cold Runner – Hot Runner – Hand – Semi Automatic – Automatic -Two plate - Three Plate – Moulds for Internal & External Undercuts- Elements of Injection Mould - Parting surface and its types , Core, Cavity , Bolsters , Guide pillar, Guide bush, Sprue bush, Locating Ring -Standard Mould System – Mould alignment – Mould Assembly – Mould Clamping.

UNIT II	DESIGN OF FEED & EJECTION SYSTEM	8

Feed System: Sprue – types of sprue – Runner – types of runner - cross section and size of runner –runner layout – balancing of runners – Gates - Gate location and balancing - types of gates – Mould Venting. Ejection System: Requirements – Elements of Ejection system - Ejector grid, Ejector plate assembly, Ejection techniques – Ejection from fixed half - Sprue Pullers- Ejection Force Calculation - Ejection Assembly Actuation

UNIT III	DESIOGN OF MOULD TEMPERATURE CONTROL SYSTEM	6

Introduction -Heat Transfer Fluids- Chillers- Temperature Controllers- Factors affecting the Cooling Cycle -Cooling Efficiency - Mould Cooling Variables -Cooling Calculations -Cooling of Integer type mould plates - Cooling of Insert Bolster assembly -cooling of other mould parts- connections of cooling channels and seals.

UNIT IV	DESIGN OF COMPRESSION & TRANSFER MOULD	8

Compression Mould Design: Introduction -Types -Open flash, Semi-positive, Positive moulds- Bulk factor - Design of loading chambers and Pressure pad - Calculations of Flash thickness, Projected area, Compression Pressure, Clamping Force, No. of impressions- Design of heating system -Advantages , Disadvantages and Applications Compression Mould. Transfer Mould Design: Introduction -Types –Design of Pot and Plunger - Calculations of Projected area, Transfer Pressure, clamping force - Design of Pressure pad and Feed system - Advantages, Disadvantages and Applications of Transfer Mould

UNIT V	DESIGN OF OTHER MOULDS & DIES	10

Blow Mould Design: Introduction- Types of blow moulds - Blow ratio - Parison design –Pinch off design - parting line - Mould cooling - Mould alignment- Advantages, Disadvantages and Applications Rotational Mould Design: Introduction– Construction- Advantages, Disadvantages and Applications. Extrusion Die Design: Principles of extrusion - construction of die - die geometry - die swell - die land design - sizing die -Advantages, Disadvantages and Applications.

TOTAL : 45 PERIODS

OUTCOMES: Upon completion of this course,

• The students will understand the basics of Plastics mould design and also product design.
• They also acquire knowledge about various moulds for different processing techniques.

TEXT BOOKS:

1. Peter Jones, The Mould Design Guide, Smithers Rapra Technology Limited, 2008, Shawbury, Shrewsbury, Shropshire, SY4 4NR, UK
2. Injection Mould Design for Thermoplastic - By Pye, R.G.W.,2000.

REFERENCES:

1. Injection Mould Design Fundamentals (Vol. I& II) - By Glanvill & Denton
2. Plastics Moulds & Dies - By Sors et al., Second Edition
3. Fundamentals of plastics mould design – By Sanjay K Nayak, Pratap Chandra Padhi and Y. Hidayathullah, 2012.
4. Injection Moulds 130 Proven Design Gastrow., 2006.
5. Dym J.B Injection Mould& Molding A practical manual, Springer, Second Edition.