Technical Analysis · 12-Second Cycle Operation

SKD Separable Type, Beryllium
— Comparison Details

Field-tested performance data comparing the Separable SKD and BeCu die casting tips under standard operating conditions.

Molten Metal 660–680°C
Cycle Time 12 seconds
Preheated Start ~150°C
Cooling Medium Water + Sleeve
Material Specifications
Tip Performance at a Glance
Separable SKD
Development Purpose — Our Product
Hardness
46–50 HRC
Cooling Time
6 sec
Peak Contact Temp
~360 °C
Post-Shot Temp
230–330 °C
  • Optimal operating range: 150–250°C
  • Optimal max surface temp: below ~400°C
  • Critical threshold: above ~450°C — cleaning pressure drops
  • Maintenance: Easier than BeCu during operation
  • Sleeve min temp: 330°C or lower (no material change)
  • Prevents sticking; faster thermal conductivity than barium tips
  • Years of field testing confirm optimal current thickness
BeCu (Beryllium Copper)
Standard Reference Tip
Hardness
36–40 HRC
Cooling Time
8 sec
Peak Contact Temp
~330 °C
Post-Shot Temp
250–400 °C
  • Optimal operating range: 150–250°C
  • Optimal range (thermal shock): 150–200°C
  • Critical threshold: above 300–400°C — hardness decreases
  • Overheating causes deformation, wear, possible seizure
  • Thermal shock cracking possible even in optimal range
  • Slightly high coefficient of thermal expansion — caution at setup
⚠ Caution Lifespan may be reduced to less than half if cooling efficiency drops below 10%. Material is heat-sensitive — handle carefully during operation.
Operating Cycle
Temperature Journey per Shot
● SEPARABLE SKD
1
Preheated Start — ~150°C
Tip is preheated before operation begins
2
Molten Metal Contact — ~360°C
Brief spike upon contact with 660–680°C molten metal; slight expansion improves efficiency
3
After Shot — 230–330°C
Post-injection temperature range
4
Cooled Stable — 120–200°C in 6 sec
Reaches stable range faster than BeCu; continues cooling below 80–100°C at 3-sec mark
● BeCu
1
Preheated Start — ~150°C
Tip is preheated before operation begins
2
Molten Metal Contact — ~330°C
Contact with 660–680°C molten metal; pressure increases due to slight thermal expansion
3
After Shot — 250–400°C
Higher post-shot temp vs SKD; wider variance
4
Cooled Stable — 120–200°C in 8 sec
Reaches ~100–120°C at 4-second mark; slower cool-down compared to SKD
Cooling Comparison Analysis
Cooling Curves — 12-Second Cycle
Temperature vs. Time (Cooling water + sleeve cooling under standard conditions)
All tips start at molten metal contact temperature (~700°C zone) and cool over 10–12 seconds
Blue — Separable SKD (Our product)
Yellow — BeCu
Green — Fc Gray Cast Iron Tip
Red — SKD Integrated Type
3 sec
SKD reaches ~80–100°C — significantly ahead of BeCu at the same mark
4 sec
BeCu reaches ~100–120°C — slower thermal dissipation profile
25%
Faster cooling of SKD vs BeCu (6 sec vs 8 sec to stable range)
Summary
Head-to-Head Comparison
Parameter Separable SKD BeCu Advantage
Hardness 46–50 HRC 36–40 HRC SKD +25%
Cooling Time to Stable 6 seconds 8 seconds SKD faster
Peak Contact Temperature ~360°C ~330°C BeCu lower
Post-Shot Temperature 230–330°C 250–400°C SKD tighter range
Critical Threshold > ~450°C (pressure drop) > 300–400°C (hardness drop) SKD higher ceiling
Maintenance Easier during operation Heat-sensitive, high care SKD simpler
Anti-Stick Improved (no sticking) Standard SKD better
Thermal Conductivity Faster than barium tips Standard SKD faster
Lifespan Risk Low with proper cooling Halved if cooling drops 10% SKD more robust
Thermal Expansion Normal Slightly high — caution at setup SKD safer