Plastics Workshops and Seminars
Gas-Assist Injection Molding
Instructor: Martin Dropik
WHO SHOULD ATTEND:
This two-day workshop will provide thorough coverage of gas assist for injection molding to participants who are interested in learning more about the process, part design for gas-assist injection molding, and simulation of gas assist for injection molding. It is appropriate for plastic molding engineers, project engineers, mold designers, part designers, and others involved with the gas-assist process. Supervisors and upper-level management are also encouraged to attend.
EDUCATIONAL GOALS:
This workshop has been developed to provide participants with a thorough understanding of gas assist for injection molding basics and terminology. Hands-on experience through lab exercises (process lab and computer lab) aim to reinforce the concepts introduced in the classroom sessions. The workshop will cover part design for gas assist, methods of gassing parts, gas process set-ups, and using computer simulation to predict the gas-assist process.
WORKSHOP OUTLINE:
1. History of Gas Assist
- Patents and patent disputes
- Current status of the technology
2. Advantages of Gas Assist
- Weight reduction
- Cycle reduction
- Aesthetics
- Press size reduction
- Incorporation of blow-molded features onto IM parts
3. Gas Methods
- Through the nozzle
- Directly into the part
- Gas channel design
- Gas channel layout
- Gas channel profile
- Part strength
- Part stiffness
- Design overspills
- Importance of simulation
- Gate location
- Gas pin location
- Use of hot runner systems
- Use of valve gates and hydraulic timers
- Importance of simulation
- Effects of delay time
- Effects of pressure
- Gas penetration
- Gate location
- Pin location
- Predicting gas flow
- Predicting machine size