Injection Plastic Molding

Scientific Molding Process and smart design for injection tools

3.40 (80 reviews)
Udemy
platform
English
language
Engineering
category
309
students
6 hours
content
May 2020
last update
$22.99
regular price

What you will learn

This course is the distillation of years of work, study and reading

During this course, the student will learn the principles of injection molding and how design a injection mold

The student willl be introduced in scientific molding

The student will learn in detail ejection system, injection system, cooling system, venting, gates and graining

Description

This course is perfect for people who want to learn more about the plastic injection process and injection molds and expand their knowledge in an industry in high demand.

This course is also essential for those people who have been in the sector for a long time and want to consolidate concepts, discover the why of things or simply remember concepts and see the latest trends in the sector.

"Remember that everything in nature when it stagnates begins a decline"


Index:

Chapter 0: Introduction

Chapter 1: Injection Molding Process

  • Introduction

  • Injection  cycle stages

  • Pvt Diagrams

  • Influence of injection parameters

  • Calculation in injection process

  • Deffects in injection molding

Chapter 2: Scientific Molding

  • Rheology curve

  • Cavities balance

  • Drop pressure

  • Seal gate

  • process window

Chapter 3: Types of injection molds

  • Introduction

  • clasficaction by feeding system

  • Clasification by number of plates in cavity/cores

  • Clasification by number of cavities

  • Special tools

Chapter 4: Ejection system

  • Introduction

  • Ejection system componts

  • Ejectors (pin ejector, sleeve ejector, blade ejectors)

  • Undercuts( slider, lifter and hydraulic movements)

  • Design of slider (components, calculations and recomendations)

  • Design of lifters (components, calculations and recomendations)

  • Design of Hydraulics (components, calculations and recomendations)

  • Double ejection systems

  • Cavity ejection system

  • How is acted the ejection system

Chapter 5: Cooling system

  • Introduction

  • Calculations: cooling time

  • Calculations: heat transfer, coolant flow and diameter of channels

  • Calculations: cooling channel depth and pitch

  • Cooling channel lay-outs

  • Components in cooling channel

  • Temperatur control unit (TCU)

Chapter 6: Injection system

  • Introduction

  • Types of injection system

  • Hot runners

  • Lay-out for moldings

  • Calculations: runner diameters.

Chapter 7: Gates

  • Introduction

  • types of gates

  • Calculate shear rate

  • Standard gates and runner shu-off

Chapter 8: Venting

  • Introduction

  • Deffects and locations for venting

  • Venting design

Chapter 9: Graining

  • Introduction

  • Chemical and laser graining

Content

Introducción

Introduction

Injection Molding Process

Introduction
Injection cycle stages : Filling stage
Packaging and plastification stage
Cooling, Opening, ejection and closing stages
Pvt diagrams
Influence of injection parameters
Calculations in injection process
Deffects in Injection Molding
Injection Molding Process Evaluation

Scientific molding

Introduction
Rheology curve
Cavities Balance
Drop Pressure
Seal gate
Process window
Scientific molding Evaluation

Types of injection molds

Clasification
Clasification by feeding system
Clasification by number of plates in cavity/by number of plates in core
Special molds
Types of injection molds

Ejection system

Introduction
Ejection system components: ejectors pins
Sleeve ejectors
Undercuts: Introduction
Sliders: Design considerations
Sliders: calculations
Other types of slider
Lifters
Types of lifter: Double bar, rack and dog system
Types of lifter: Flexible and unilifters
Calculate dimensions for a lifter
Hydraulic ejectors
Calculate a hydraulic cylinder
Double Ejection systems (1)
Double Ejection systems (2)
Double Ejection systems (3)
Double Ejection systems (4)
Cavity ejection system
Calculation in ejection system: Ejection force
Calculation in ejection system: Number of ejectors
How is acted the ejection system?
Ejection system

Cooling system

Introduction
Calculations: Cooling time
Calculations: heat transfer, coolant flow
Calculations: Channel diameter
Calculations: cooling channel depth and pitch
Cooling channel lay-out
Components in cooling channel
Temperature control units (TCU)
Cooling system

Injection system

Introduction
Types of Injection systems
Hot runners
Lay-out for moldings
Calculation of runner diameters
Injection system

Gates

Introduction
Types of gates
Calculate shear rate
Standar gates and runner shut-off
Gates

Venting

Introduction
Deffects and location for venting
Venting design
Venting

Graining

Introduction
Chemical and laser graining
Graining

Screenshots

Injection Plastic Molding - Screenshot_01Injection Plastic Molding - Screenshot_02Injection Plastic Molding - Screenshot_03Injection Plastic Molding - Screenshot_04

Reviews

Lowell
October 8, 2023
he probably knows his topic but it's almost impossible to understand through the thick accent and over modulation from speaking too close to the microphone.
Whamza
September 19, 2023
As i read a lot of reviews about the instructor pronunciation is difficult but I decided to try it. Content very good and useful to me until now. Pity if his accent more clear will be amazing.
Habip
July 6, 2023
Definitely perfect! Lecturer gives the content with details, theoric information and examples. The course hour is enough and helps to understand the concept. Examples from industry expands the topic and theoric examples shows how to approach the case.
Jean-Pierre
July 11, 2022
- Content is good, goes into machine design details - The PPTs should be available - The accent is difficult to understand for non-Spanish speakers, some students would appreciate subtitles - Sometimes the visual material is partly in Spanish Opinion: is sad to see all the comments stating that the course is good, but it has a low score because of the presenters accent
Vineeth
March 20, 2022
Fluency in english, and english grammer need to be improved . Content calrity also need to be improved with better images/description
Rui
February 13, 2022
The content of the course is fantastic! What deserves some attention is the Teacher's English pronunciation which sometimes requires me to repeat parts of the lessons. But in general we can understand well!
John
February 1, 2022
This is a fantastic course and the instructor is incredibly knowledgeable. I would recommend subtitles as the instructor is sometimes hard to understand due to his accent. I however did find it easier to understand him the further I got into the course as my ears became tuned in to the accent.
Manoli
October 3, 2021
This curse is great!!! I have learnt a lof of things regarding to injection molding process and I can use them in my job.
Alpay
April 1, 2021
the knowledge is good but it is very difficult to understand because of the presenter's sympathetic Spanish accent, I think the subtitle is necessary, even it is must.
Devi
December 22, 2020
It is an excellent course for plastics injection molding technician. I liked this course a lot. This course is designed in better. I learned a lot from this course.
Paul
June 1, 2020
Not enough details about how the Rheo curve has been setup. How do you know at 50 mm/s inj speed what the shear rate and relative viscocity is? I need more background info about this in order to setup the curve myselve

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3132236
udemy ID
5/15/2020
course created date
1/27/2021
course indexed date
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