Case Study 3 - Runner Systems Comparison

Before
( Cold runner)
No. of cavity 32
Material used POM
Material cost (Est.) US$ 1.50/kg
Qty/Month/Mould 3000K pcs
After
( Mini runner)
Product application: Consumer Products
Runner System

Runner weight
(Material)

Cycle time
(Machine)

 Productivity/day
Before Cold runner 0,862 g/pc 2,5 sec/pc 92,503 pcs
After Mini runner 0,15 g/pc 1,88 sec/pc 148,859 pcs

Approx.saving

(cost of material @ US$ 3.00/kg& molding machine @ US$ 20/hr)

 0,458 g/pc (82%) 0.343 sec/pc (38%) 56,356 pcs (61%)
US$ 0.000687 /pc US$ 0.001905 /pc
Total saving (Material + Machine) US$ 0.002592 /pc  
MSK mini runner system cost US$ 7,800
Estimated ROI

ROI =

  • MSK minirunner system cost
  • Total saving x Qty/mth
 1.0 months
Approx.saving (Total saving x Qty/mth x 12)
Year 1 – US$ 85,536 Year 2 – US$ 93,312