Typically Poor Design for Eastar	Improved Design for Eastar	Suggested Design for Eastar

Critical Constraints

• Insulate melt from cooled steel
• Dedicated water supply to tip
• Mechanical valve gate
• No material hold-ups
• Dedicated thermal controller for each tip

Notes:

• Melt should be insulated from cooled steel of cavity to prevent partial freeze off of outer melt skin, causing high injection pressures and potential discoloration, streaks or degradation.
• Dedicated water lines allow increased temperature control. Gate must be cooled quickly to prevent sticking or stringing.
• A mechanical valve gate allows use of a larger gate without loss of gate aesthetics.
• Dedicated thermal controller allows maximum control of process.
• Involving the mold builder, hot runner manufacturer and the material supplier in the design and selection of hot runner systems will improve probability of project success.