|
What is a Mold?
|
Types of Molds
[EXERCISE]
Types of Molds |
|
Casting Mold, Forging, Press Mold, Die
Cast Mold, Plastics Mold |
Injection
Molding
[EXERCISE]
Injection Process of Injection Molding |
|
Closing Mold, Nozzle Seating, Cooling,
Mold Opening |
|
Mechanism of Mold
|
Structure
of Molds
[EXERCISE]
Names of mold structure |
|
Two-plate mold , Three-plate mold, Runnerless
mold |
Function
of Major Parts
[EXERCISE]
Common Parts, Ejector, Mold Base, Slide Core, Loose Core |
|
Common Parts, Ejector, Mold Base, Slide
Core, Loose Core |
Sequence
of Mold Movement
[EXERCISE]
Sequence of mold movement |
|
Opening mold (start), Opening mold (Complete)
, Ejecting part (start), Ejecting part (Complete), Ejecting part , closing
mold (start), Closing mold (Complete), One cycle |
|
Role of Parts
|
Cavity
and Core
[EXERCISE]
Type of Inserts |
|
Cavity and Core, Type of Insert, Making
Inserts, Position of Inserts |
Runner System
[EXERCISE]
Cross Section of Runner, Name of Gate |
|
Runner , Gate, Parts of Sprue |
Undercut Process
[EXERCISE]
Slide Core Setting, Loose Core Setting, Hydraulic Cylinder Calculation |
|
Outer Slide Core Method, Inner Slide,
Hydraulic Cylinder Method |
Ejecting Parts
[EXERCISE]
Ejection Method, Selecting Ejector Plate Ejection Spring 1, Selecting
Ejector Plate Ejection Spring 2, Selecting Gas Spring |
|
Pin Ejection, Sleeve Pin Ejection, Stripper
Plate Ejection, Compressed Air Ejection, Two-Stage Ejection, Hydraulic
Ejection, Ejector Plate |
Mold Cooling
[EXERCISE]
Core Cooling Method |
|
Position of Cooling Channel , Cavity
Cooling, Core Cooling |
Degassing and
Air Venting
[EXERCISE]
Defect by Degassing and Air Venting |
|
What is degassing and Air Venting?,
Design of Degassing and Air Venting |
Considering
Mold Dimension
[EXERCISE]
Mold Dimension |
|
Mold Dimension, Possibility of Part
Removal, Ejector Pin Position |
Determining
Mold Material
[EXERCISE]
Types of Mold Material |
|
Material Criteria, Types and Use of
Mold Material, Heat Treatment of Material |
[Appendix]
Mold for Forming Screw Thread
[EXERCISE]
Screw Thread Molding Method |
|
Type of Screw, Molding Inner Screw,
Positioning of Rotating Screw, Molding Outer Screw |
|
Quality of Molded Parts
|
Quality
of Molded Parts
[EXERCISE]
Quality of Molded Parts |
|
Quality of Molded Parts, Molding Process,
How to improve the Quality? |
Dimension of Parts
[EXERCISE]
Calculation of Part Shrinkage, Flow Path Ratio |
|
Part Shrinkage Rate, Draft Angle, Flow
Path Ratio |
|
Operation of Injection Molding
Machine
|
Installation
of Mold
[EXERCISE]
Mold Installation Steps |
|
Mold Installation , Mold Installation
Steps, Mold installation Bolt |
Setting Molding
Condition
[EXERCISE]
Caution for molding condition |
|
Injection Condition, Temperature Condition,
Ejection Condition |
Mechanical
Structure of Molding Machine
[EXERCISE]
Calculation of Clamping Force |
|
Injection Device, Clamping device, Force
and Transferring System, Electric Control Device |
|
Types of Plastics and Their
Properties
|
Type
of Plastics
[EXERCISE]
Type of Plasticss |
|
Thermoplastics, Thermosetting Plastics,
Difference between crystalline plastics and amorphous plastics |
Property of Plastics
[EXERCISE]
Property of Plastics |
|
Property of Plastics, Characteristics
of Resin in Molding Processing |
|
Molding Problems and Solutions
|
Molding
problems and Solutions
[EXERCISE]
Causes and Solutions of Molding Problems |
|
Sink Mark, Warpage, Whitening, Weldline,
Flash, Short Shot, Jetting, Flow Mark |
|
Technical Information
|
Proper Steel for Major Resin,
Part Shrinkage rate, L/T (Flow Path Ratio) Target, Tie Bar Distance, Mold
Installation Bolt and the Clamping Force, Cavity Pressure, Molding Temperature,
Comparison between Direct Pressure System & Toggle System Examples of
Use of Plastics Material, Fusion Point and Solidification Temperature
for Each Resin, Property of Plastics |
