Injection Moulding Defect Analysis

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  • Private Class Price is Per Day not Per Pax
  • Send 1 or 20 pax for the same price
  • HDRF Claimable(SBL)

Private Class from

2000/day

(2 Days)

BENEFITS

Upon completion of this programme, the participants will be able to:

  • Describe, in terms of molecular movement, plastics materials change of state during processing
  • Outline the relationship between melt flow index and molecular length (molecular weight)
  • Provide detailed descriptions of mound filling methods.
  • Terminology and descriptions of molding defects.
  • Process documentation to ease the troubleshooting process.
  • Long term and short term effects of process changes

AUDIENCE

This program is suitable for personnel already familiar with the Injection Molding Process and interested in developing a deeper understanding of the subject. The course material will be such as to have a high practical application

METHODOLOGY

This stimulating program will maximizes the understanding and learning through lecture, discussion and other hands on activities

OVERVIEW OF MACHINES
WHAT CAUSES DEFECT?
  • Root Cause Analysis
  • Sources Of Problems
    • Process / Machine
    • Plastic Material
    • Mold / Tool Design
    • Product Design
    • Management Philosophy
    • Working Environment
    • Working Experience
PLASTIC FLOW
  • Basic Fluid And Flow Phenomena
    • Basic Flow
    • Jetting
    • Transient Flow
    • Barrel Fluid Flow
    • Cavity Flow
    • Hesitation Flow
IMPORTANT POLYMER PROPERTIES
  • Properties Of Bulk Material
    • Bulk Density
    • Coefficient Of Friction
    • Particle Size And Shape
  • Melt Flow Properties
    • Drag Flow
    • Pressure Flow
    • Shear
POLYMER DRYING
  • Why Dry Plastic Pellets
  • Moisture Problems
    • Machine Processing Problems
    • Cosmetic Problems
    • Structural & Physical Problems
  • Hygroscopic Polymers
  • Non-Hygroscopic Polymers
  • Dehumidifier
    • Drying Temperatures
    • Dew-Point
    • Drying Time
    • Airflow
CHANGE IN PROCESSING PARAMATERS
  • Drying
  • Screw Speed
  • Injection Speed
  • Back Pressure
  • Injection Pressure
  • Barrel & Mold Temperature
TROUBLE SHOOTING
  • Making Decision
    • Appraise The Situation
    • Analysis The Problem
    • Analysis Potential Problems
  • Solution
    • Fast Result
    • Slow Result
    • Resin, Mechanical Or Design
TYPE OF DEFECT
  • Definition Of Appearance And Dimensional
  • Visible Defects And Non-Visible Defects
  • Processing Defects-Definitions, Causes & Solutions
    • Drool
    • Nozzle / Tip Frozen
    • Slow Cycle Time
    • Sweaty / Corrosion Of Tool
  • Visible Part Defect
    • Black Speck
    • Bubbles / Blister
    • Burns & Black Surface
    • Cloudy / Hazy
    • Poor Color Distribution
    • Crazing, Stress Whitening
    • Delaminating
    • J-Hooks
    • Jetting
    • Dimension Unstable
    • Silver Streaks
    • War Page / Deformation
    • Non Visible / Internal Part Defect
    • Voids

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