Seminar Outline
- Introduction
- Purpose
- Perspectives on the plastics' industry, Injection Molding
- Profits
- The five components of a successful plastics' application
- Concurrent engineering and its benefits
- History and Trends
- You want it when?
- Polymer Basics and Resin Selection
- Where plastics originate
- Chain length and molecular weight distribution
- Melt Flow Rate testing
- Moisture Sensitive Polymers
- Degradation
- Use of regrind
- Plastic Categories
- Thermoset LSR
- Thermoplastic
- Amorphous vs. Semi-crystalline plastics
- Crystallinity
- Mold shrinkage
- Degree of Crystallinity
- Additives
- Warp
- Material selection and Testing; a designer's guide
- Questions that must be answered
- Properties to watch during the selection process
- What the physical tests will tell you
- Single point data vs. curves
- Polymer Testing
- Selected physical property tests
- Comparing data sheets
- Glenn Beall's check list
- Overview of Injection Molding Processing
- Machine Components
- How the machine works
- Hydraulic
- Electric
- What is important for the Designer, Mold Maker: mold opening
- Processing
- Plastic flow
- Multi-cavity flow
- Press issues
- Identical Parts over Time/Shipments/States/Countries
- Process Parameters You Need to Watch, run to run; different presses; identical part
- Mold/Tool Design/components
- Tool Design
- Mold Components
- Hot vs. Cold Runner
- Multicavity Molds
- Gating
- Hot tips
- Runners Sizing
- Mold-filling analysis
- Accuracy of CAD model/Resin data, no general comments
- Full CAD model, all the details
- Accuracy of Resin data
- Example with benefits and issues
- Venting
- Silicone molds
- Offshore Manufacturing (on request only)
- Reasons to locate offshore
- Reasons not to move offshore
- Approaches to offshore manufacturing
- Proactive check-ups
- Additional thoughts
- Piece Part Design: The Plastics Perspective (It is not nice to fool with Mother Nature)
- Components of Design
- Nominal Wall
- Projections
- Depressions/Holes
- Uniform Nominal Wall
- Shrinkage, Amorphous vs. Semi-Crystalline
- Changes in nominal wall
- Radii
- Dimensional Stability - Cooling and Warp
- Nominal wall transition/junction/radius
- Filling pattern
- Joining flat plates
- Radius
- Warp
- Draft
- Polish/Texture
- Case Histories
- Projections
- Ribs
- Bosses
- Gussets
- Flow considerations
- Sink/shrink cosmetics
- Venting
- Depressions/Holes
- Blind Holes
- Through Holes
- Venting
- Fasteners
- How to form, tooling issues
- Weldlines
- Filling/Flow considertions
- Stress Management
- Bealls 13 Rules
- Tolerances
- Components of Design
- Hinges and Snap Joint Techniques
- Flexible design techniques
- Distortion snaps
- Press-fit assembly
- Snap-fits, snap-hook designs, cantilever snap joints, annular snap-joints, latches, permanent snap design and twist snaps.
- Miscellaneous
- Instructors information
- Resources
- Checklists
- Essential information to be agreed upon by product designed and mold designer
- Test your knowledge of plastic part design