Table of Contents
 

 

Wear and Lubrication

  • W\ear Caused by Resin Action
  • Abrasion
  • Corrosion Caused by Coolant
  • Corrosion Caused by Atmosphere
  • Lubrication in Moulds
  • Pressure of lubrication
  • Avoiding fatigue in moulds
  • Material Selection
  • Finishing
  • Product Shape
  • Mould and Mould Parts Handling Safety
  • Marching of a Meld Part
  • Lifting Holes on the Faces of a Plate
  • Eye Bolts
  • Lifting and Slinging Theory
  • Do,s and Con,ts of Eye Bolt Usage
  • Mounting of Mould in Machine
  • Larger Moulds
  • Quick Mould Changers
  • Latches
  • Latches For Mould Servicing

Identification & testing of Plastics

  • Chemical resistance
  • Polyethylene Terephthalate Films
  • Typical injected applications
  • Typical sheet/film application
  • Trade names
  • Foamed Plastic
  • Foamed Plastics
  • There are Four main Types of Plastic insulation
  • Extruded Polystrene (XPS)
  • Extruded Polyethylene (XPE)
  • Expanded Polystyrene (EPS)
  • Polyurethane (PUR) and Polyisocyanurate (PIR)
  • Tensile Elongation
  • Tensile Modulus of Elasticity
  • Izod Impact Strength Testing of Plastics
  • astmD256
  • Cup Flow Test
  • Measurement of Spiral Flow

Compression Moulding

  • Compression Modeling
  • Compression molding process
  • Compression Molding Press
  • Down Press
  • Specification of Compression Molding Press
  • Materials used in Compression Molding
  • Types of Compression Moulds
  • Open Flash Type
  • Performing
  • Pre heating
  • Mould heating
  • Heating Methods Used in Compression moulds
  • Steam Heating System
  • Hot Water/Oil Heating
  • Electrical Heating
  • Resistance heating
  • Breathing
  • Bulk Factor
  • Advantages of Compression Moulding
  • Transfer Moulding
  • Description of Process
  • Moulding Cycle
  • Material Used in transfer Moulding
  • Type of Transfer Mould
  • Bottom Plunger Type Mould
  • Advantages of Transfer Moulding
  • Disadvantages of Transfer Moulding
  • Compression Mould Desing
  • Machines
  • Compression and Transfer Presses
  • Two General Type of presses are used
  • Hand Moulds
  • Semiautomatic Mould
  • Automatic Mould
  • Flash Moulds
  • Cross Section of a simple flash Mould
  • Advantages of flash-type compression moulds are
  • Semi Positive Mould
  • Design of Mould Cavity and Punch
  • Loading Chamber Design
  • Open Flash Mould
  • Loading Chamber Dimensioning and Design
  • Design of the mould cavity
  • The Punch
  • Heaters
  • Transfer mould Desing
  • Transfer Mould Parts
  • Pot Transfer Mould
  • The transfer pot
  • Transfer mould cavity considerations
  • Parting line location
  • Materials for transfer moulding
  • Gate location
  • Venting of Transfer Moulds
  • Guide pins
  • Ejector Pins
  • The plunger
  • Runnes systems
  • Gating transfer Moulds
  • Mould Design
  • Types of Machines
  • High-frequency Preheating
  • Transfer Moulding

 

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