1. Introduction

2. Molding Conditions

2.1 Standard Molding Conditions

2.2 Pre-drying

2.3 Cylinder Temperature

2.4 Mold Temperature, Injection Speed and Molding Cycle

3. Moldability

3.1 Flowability

(1) Melt Viscosity

(2) Bar Flow Length

3.2 Shrinkage Characteristics

(1) Mold Shrinkage

(2) After-shrinkage

(3) Annealing

(4) Dimensional Changes by Water Absorption

4. Molded Product Quality

4.1 Dimensional Tolerances

4.2 Deformation

(1) Shape Design vs. Deformation

(2) Gate Design vs. Deformation

(3) Molding Conditions vs. Deformation

4.3 Use of Regrind

5. Mold Design

5.1 Runner Design

5.2 Gate Design

5.3 Gas Vents

5.4 Undercut

5.5 Draft

5.6 Mold Temperature Control

5.7 Mold Materials

6. Safety Precautions

7. Countermeasures for Defects