ITEM/Comparison
CONVENTIONAL COOLING BAFFLE
SPIRAL COOLING TUBE
MATERIAL
Metal material is easy to rust & eroded
Tough plastics material
TOOLING METHOD
Complex
Simple
TOOLING TIME
Long
Short
FITNESS
Bad
Good
WATER FLOW PHENOMENA
Laminar flow
Turbulent flow
COOLING EFFECT
Uneven
Even
MOLD COST
High
Low
INJECTION MOLDING COST
High
Low
CONCLUSION
Production cost high, part quality bad
Production cost low, part quality good
 
   
 
 
 
ITEM/Comparison
CONVENTIONAL COOLING BAFFLE
SPIRAL COOLING TUBE
MATERIAL
STAINLESS SHEET: Tooling property is bad due to material is strong and tough.
COPPER SHEET: Tooling property is good, but easy to bear the copper rust.
PA6+30%GF: Tough plastics can resist temperature up to 200°C, No oxidation, No erosion.
TOOLING METHOD
Cut metal sheet Machining Manipulated fine tooling Fit with hole Tapping on mold base and screwing with no head screw Laborious, time wasting, moreover difficult to maintain.
All-in-one molded part, just slightly press spiral tube, then screw copper plug tightly - Easy doing, time saving and easy to maintain.
TOOLING TIME
TAKE THE Ø20 X 300L FOR COMPARISION: Takes about 25-45 minutes.
About 0.5-1.5 minutes
FITNESS
MANIFULATION MAKES THE QUALITY UNSTABLE.
1. The center lines are unaligned between sheet and hole.
2. Loose fitness with hole will lower cooling efficiency. Tight fitness with hole will make assembly difficult
Contact surface of spiral tube and hole is spiral periphery times approximate 0.4mm spiral line thickness. Small contact surface makes assembly easy. Good fittness makes high cooling efficiency.
WATER FLOW PHENOMENA
II Shape sheet is difficult to generate turbulent flow. Impurity in water is easy to deposit.
Easy to generate turbulent flow. Impurity in water is difficult to deposit.
COOLING EFFECT
II SHAPE: Inlet side is cool, outlet side is hot Uneven temperature Large shrinkage and bad dimensions.
Stress concentration Part is easy to warp and make appearance bad.
Water goes in and out through the 360° spiral channel. Heat transfer efficiency is high and mold temperature distribution is even. Part dimensions are stable.
MOLD COST
Tooling cost high, material cost low.
Tooling cost low, Material cost reasonable.
INJECTION MOLDING COST
Effect cycle time. Part dimensions are unstable and accumulated cost for long term is terrible.
Improve cooling efficiency. Part dimensions are stable and saved cost is amazing.
CONCLUSION
Difficult to tool, uneven temperature distribution. Part dimensions are unstable, production cost is high.
Easy to tool, even mold temperature distribution. Part dimensions are stable, production cost is low.