February22, 2013
#142 Two-Stage Ejecting Structure

February15, 2013
#141 Ejecting Stripper Plate Structure

February 8, 2013
#140 Maraging Steel

February 1, 2013
#139 Strength Calculation of the Thickness of the Side Wall of a Cavity (In the case of a rectangular cavity with bottom surface parting)

January25, 2013
#138 PET Plastic

January18, 2013
#137 Nickel

January11, 2013
#136 Thermal Conductivity of Materials

December21, 2012
#135 Thermal Diffusion Coefficient of Major Plastics

December14, 2012
#134 Extrusion Molding

December 7, 2012
#133 Vacuum Molding Method, Compressed Air Molding Method

November30, 2012
#132 Transfer Molding Method

July13, 2012
#131 Compression Molding Method

July 6, 2012
#130 Guidelines of Molding Shrinkage Ratios of Major Plastic Resin (2)

June29, 2012
#129 Special Injection Molding Methods (Insert Method)

June22, 2012
#128 Special Injection Molding Methods (Blow Molding Method)

June15, 2012
#127 Special Injection Molding Methods (Two Color Injection Molding Method)

June 8, 2012
#126 Specifications of Plastic Injection Molding Machines

June 1, 2012
#125 Molding Technology for Plastics with High Cavity Surface Temperatures

May25, 2012
#124 Gate Cutting Unit inside the Mold

May18, 2012
#123 Removable insert

May11, 2012
#122 Method of Determining Cavity Dimensions (2)

April20, 2012
#121 Method of Determining Cavity Dimensions (1)

April13, 2012
#120 Mold Deposits

April 6, 2012
#119 Cooling Time of the Central Part of the Molded Article

March30, 2012
#118 Thermal Stress on Hot Runner Manifold (Practice Calculations)

March23, 2012
#117 Thermal Stress on Hot Runner Manifold

March16, 2012
#116 Cost Analysis of Plastic Molded Article

March 9, 2012
#115 Plant-Origin Biodegradable Plastic - Polylactic Acid Plastic (2)

March 2, 2012
#114 Plant-Origin Biodegradable Plastic - Polylactic Acid Plastic resin (1)

February24, 2012
#113 Accuracy of Mold Preparation

February17, 2012
#112 Varieties of Tunnel Gates

February10, 2012
#111 Basic Structure of an Injection Molding Machine

February 3, 2012
#110 Determining the Dimensions of the Side Gate (Practice Calculations)

January27, 2012
#109 Determining the Dimensions of the Side Gate

January20, 2012
#108 Releasing the Molded article from the Mold

January13, 2012
#107 Melt Flow Rate (MFR) of Plastics

December16, 2011
#106 Glass Transition Temperature Tg of Plastics

December 9, 2011
#105 Molding Conditions of an Injection Molding Machine (4)

December 2, 2011
#104 Molding Conditions of an Injection Molding Machine (3)

November25, 2011
#103 Molding Conditions of an Injection Molding Machine (2)

November18, 2011
#102 Molding Conditions of an Injection Molding Machine (1)

November11, 2011
#101 Power Source and Controlling Method of an Injection Molding Machine

November 4, 2011
#100 Units Relating to an Injection Molding Machine

October28, 2011
#099 Strength Theory of Mold Design

October21, 2011
#098 Hard Chromium Plating

October14, 2011
#097 Analysis of Mold Breaking Accident

October 7, 2011
#096 On the Number of Cavities in a Mold

September30, 2011
#095 Injection Molding of Heat Resistant Polylactic Acid Resins

September16, 2011
#094 Treatment of Undercuts using Insert Blocks

September 9, 2011
#093 Biodegradable Plastics

September 2, 2011
#092 Biodegradable Plastics

August26, 2011
#091 Thermal Expansion of Molds

August 5, 2011
#090 Techniques of Mold Maintenance

July29, 2011
#089 Polishing the Cavity

July22, 2011
#088 Method of Preliminary Drying of Plastic Resin

July15, 2011
#087 Molds for Food Containers

July 8, 2011
#086 Molds for Medical Parts

July 1, 2011
#085 Molds for Plastic Magnets

June24, 2011
#084 Basic Dynamics of Injection Molds (Flow Volume Equation)

June17, 2011
#083 Basic Dynamics of Injection Mold（Fluid Dynamics)

June10, 2011
#082 Basic Dynamics of Injection Mold (Force at the time of mold opening and closing)

June 3, 2011
#081 Basic Dynamics of Injection Mold (Kinetic energy during mold opening and closing)

May27, 2011
#080 Design Concepts of Mold Design

May20, 2011
#079 The Importance of Thermal Insulation Plate

May13, 2011
#078 Texture and Steel Materials

April22, 2011
#077 Solutions for Molding Defects (Gloss Defect)

April15, 2011
#076 Solutions for Molding Defects (Silver Streaks)

April 8, 2011
#075 Solutions for Molding Defects (Burns)

March18, 2011
#074 Basic Theory of Molding Shrinkage Ratio

March11, 2011
#073 Key Points of Maintenance of Molds

March 4, 2011
#072 Deformation of Mold Components

February25, 2011
#071 Merits or Demerits of Standardization for Mold Design and Fabrication

February18, 2011
#070 Constituent factors of an Injection Molding Cycle

February 4, 2011
#069 What is an Injection Molding Cycle?

January28, 2011
#068 Hints on Mold Design for Plastics with High Cavity Surface Temperatures

January21, 2011
#067 Mold Design for Electric Injection Molding Machines

December17, 2010
#066 Initial Cost Structure of Molds

December10, 2010
#065 Causes of and Countermeasures for Gas Burns

December 3, 2010
#064 Method of Providing Air Vents

November19, 2010
#063 Wear of Molds

November12, 2010
#062 Types of Plastics and Guidelines for Selecting Steel for the Cavity

November 5, 2010
#061 Mean Time Between Failures of Molds (MTBF)

October29, 2010
#060 Periods of Mold Failures

October15, 2010
#059 Fool Proof in Mold Design

October 1, 2010
#058 Fail Safe in Molds or Injection Molding Machines

September24, 2010
#057 Stabilizing the Clamping Force of Single Cavity Mold

September17, 2010
#056 Preventing the Position Shift of Left-Right Asymmetric Cavities

September10, 2010
#055 Designing the Tip Shape of Pin Point Gate

September 3, 2010
#054 Mating With Nested Divisions

August27, 2010
#053 On Assembling a Square Core

August 6, 2010
#052 Selection of the Runner Cross-sectional Shape

July23, 2010
#051 Method of Connecting the Cavity and Core

July16, 2010
#050 Cavity and Core Integrated Structure and Spliting Structure

July 9, 2010
#049 Features of Motor Driven Injection Molding Machines

July 2, 2010
#048 MuCell ® Process Latest Injection Molding Technology of USA

June25, 2010
#047 Mold Welding Work

June18, 2010
#046 Mold Assembling Work

June11, 2010
#045 Scraping Work

June 4, 2010
#044 On the 400th Issue of These Courses - Part 2

May28, 2010
#043 On the 400th Issue of These Courses

May21, 2010
#042 Filing Work

May14, 2010
#041 Hand Finishing Work

May 7, 2010
#040 Linear Expansion Coefficients of Materials

April23, 2010
#039 Tempering of SKD61

April16, 2010
#038 Mold Base

April 9, 2010
#037 Structure and Characteristics of Hot Runners

April 2, 2010
#036 Improvements in the Ease of Maintenance of Molds

March26, 2010
#035 Flow Rate of Mold Cooling Water

March19, 2010
#034 Pressure Loss in the Runners

March12, 2010
#033 Key Aspects of Textured Finishing

March 5, 2010
#032 Maintenance Items of Molds for Plastic Injection Molding

February26, 2010
#031 Jetting

February19, 2010
#030 Appropriate Pre-drying of Plastic Molding Materials (Revised Version)

February12, 2010
#029 Causes of and Countermeasures against Burn

February 5, 2010
#028 Molding Shrinkage Ratios of Major Plastic Materials

January29, 2010
#027 Hot Runner Technology

January22, 2010
#026 Basic Varieties of Tunnel Gates

December25, 2009
#025 Mold Galling

December18, 2009
#024 Measures to Solve Molding Defects (Bubbles)

December11, 2009
#023 Measures to Solve Molding Defects (Flow Marks)

December 4, 2009
#022 Measures to Solve Molding Defects (Short Shots)

November27, 2009
#021 Measures to Solve Molding Defects (Sink Marks)

November20, 2009
#020 Example of Calculating the Cooling Time (1)

November13, 2009
#019 Molding Cycle and Cooling Time

November 6, 2009
#018 Mold Related Dimensions of Plastic Injection Molding Machines (1)

October23, 2009
#017 Calculation of the Deflection of the Moving half Cavity Plate

October16, 2009
#016 How is the Rigidity of a Mold Increased?

October 9, 2009
#015 Section Modulus of Mold Components

October 2, 2009
#014 Moment of Inertia of of areaMold Components

September25, 2009
#013 Thermal Expansion of Mold Components (Example of Calculation)

September18, 2009
#012 Thermal Expansion of Mold Components

September11, 2009
#011 Bending of Core Pins due to Injection Pressure

September 4, 2009
#010 Procedure for Determining the External Dimensions of a Cavity

August28, 2009
#009 What is the Elastic Modulus of Steel?

August21, 2009
#008 Method of Forming Holes in Molded Products

August14, 2009
#007 The Flow Ratio (L/t) of Plastic

August 7, 2009
#006 Basic Knowledge on the Mold Clamping Force

July31, 2009
#005 Why Does a Mold Break?

July24, 2009
#004 Guide to the Molding Shrinkage ratio of Major Plastic resins (1)

July15, 2009
#003 The Chemical Composition of Steel for Mold Manufacturing

July14, 2009
#002 Introduction to Products by Misumi ~ Spiral Baffle Plates

July13, 2009
#001 What is the Molding Shrinkage Phenomenon?