https://otc.com.my/public-programs/plastic-injection-molding-defects-prevention-root-cause-analysis-8-9-otc2025/

Course objective

1) How to prevent defects from occurring in the first place?

2) Eighty % of plastic parts problems originate from poor design.

3) Gap analysis between DFM (Design for Manufacturing best practices) and your actual problems

4) Root cause analysis

5) Troubleshooting injection moulding defects in a systematic manner

6) Implementing sustainable measures in place to prevent defects recurrence

7) Scientific explanations on why these problems occur.

course introduction

Specifically designed for the practicing designer and molder.

This workshop focuses on prevention methods for defects and developing systematic root cause analysis skills. For solving molded-part defects and improving part quality problems.

Who Should Attend

This course is recommended for those who wish to improve their preventive & problem solving skills in plastic injection moulding design and process. It is also highly beneficial to companies aiming to improve productivity and optimise their injection moulding design and process methodology. A variety of people will benefit from this course. They include:

1. Managers

2. Designers

3. Engineers

4. Executives

5. Supervisors

6. Technicians

7. Any technical personnel involved with plastic injection moulded parts

COURSE CONTENT

Plastic drying

• Degradation

  • Drying time

  • Drying temperature

  • Types of dryers

  • Moisture measurement

  • Overdrying effect

Process optimization & scientific molding

• Optimization of injection phase

  • Cavity balance

  • Pressure drop

  • Process window

  • Gate seal time

  • Cooling time

  • Screw speed & back pressure

Surface Defects

• Flow lines and jetting

  • Splay (moisture or trapped air)

  • Haze, blush, and poor gloss

  • Mold mark

  • Gate blush and gate splay

  • Ink smearing

  • Incomplete molding

  • Race tracking

  • Jetting

  • Moldflow simulation errors

Burning and Contamination Problems

• Burn marks and black specks

  • Burn streaks

  • Contamination

  • Discoloration or poor color match

Physical Problems

• Flash

• Short shots

• Sink marks

• Vacuum voids and bubbles

• Burrs

• BulgingOverweight

• Ejector marks