Who Should Attend ▼
Anyone responsible for procuring, evaluating, building or designing injection mold tools,
including tooling engineers, buyers, toolmakers, mold designers, product designers,
managers and molders.
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Benefits and Learning Outcomes ▼
- Understand mold design concepts
- Avoid costly mistakes
- Specify and evaluate your purchases of molds
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Course Outline/Topics ▼
Introduction and Overview
The Anatomy of a Mold
Mold Types
- Stripper plate molds
- Unscrewing molds
- Quick change molds
- Hot runner molds
- Shuttle molds
Basic Mold Construction
- Use and placement of bolts and dowels
- Major suppliers and differences between them
- How to specify and order mold bases and components
Common Components and their Function
- Leader pins, return pins, support pillars, rest buttons, etc.
The Molding Press
- How the mold interfaces with the press
- Horizontal and vertical clamp
- Shuttle and rotary presses
Plastic Resin Fundamentals
- Amorphous and semi-crystalline
- Basic properties and how they affect the mold design
Shrink
- How to use shrink to your advantage
- Factors that affect shrink and warp
Plastic Product Design Fundamentals
- Common errors
- What the mold designer needs to look for in a product design
Sprue, Runner and Gate
- Common gate design errors
- Runner sizing guidelines
- Runner pullers
Ejection
- Determining ejector place
- Pin orientation methods
- Knock-out patterns
- Return pins and springs
Basic Mold Inserting
- Solid vs. split construction
- Criteria for inserting
Slides and Lifters
- A thorough look at how to mold undercuts
- Typical slide and lifter construction
- Mechanical vs. hydraulic
Cavity Layout
- How to efficiently “place“ the cavities in the mold and choose the best parting line
- How it affects runners, ejection and gates
Cooling
- The economic effect of cooling design
- General rules for waterline placement
- Thermal conductivity of various tool steels
Venting
- Venting of runners
- How venting affects the molded part
- Why this should NOT be overlooked
Mold Steel
- What to look for in a mold steel
- A discussion of steel hardness
- Alternate materials used in molds
Plating and Polishing
- A selection chart for mold coatings
- When and why to use plating
Mold Design from a Project Perspective Student Design Projects
- Students will be split into groups to work on actual design projects
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