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