Reduce CO2
with Runnerless

 Conditions for Calculating Co2 Emissions

1. Resin CO2 emission factor: Based on data from the Chemical Economics Research Institute (1993).

2. Electricity CO2 emission factor: Based on data from the Federation of Electric Power Companies of Japan (2003).

3. Power consumption of molding machines and hot runner systems measured from actual hot runner mold molding experiments.

4. Discharged runners were created using CAD; their volume was calculated and converted into weight.

5. Molding conditions were based on hot runner experiments; cold runner conditions were assumed.

6. Recycling rate of runners uses assumed values.

7. Mold temperature control power and material drying power are not considered.

8. CO2 emissions during mold and hot runner manufacturing and transportation are not considered.

​Case 1

Calculation Results

●CO2 from product material: 5.08 g (per product)
●CO2 from runner material: 4.01 g (converted per product)
●CO2 from molding machine electricity (cold runner): 0.308 g
●CO2 from molding machine electricity (hot runner): 0.258 g
●CO2 from hot runner control electricity: 0.271 g

●Total CO2 emissions (Cold runner): 7.46g
●Total CO2 emissions (Hot runner): 5.61g

CO2 reduction rate using hot runner >>> 24.76％

* Product and runner values represent emissions per single product. Recycled portions are not included.

​Case 2

Calculation Results

●CO2 from product material: 18.09 g (per product)
●CO2 from runner material: 9.70 g (converted per product)
●CO2 from molding machine electricity (cold runner): 1.15 g
●CO2 from molding machine electricity (hot runner): 0.884 g
●CO2 from hot runner control electricity: 0.565 g

●Total CO2 emissions (Cold runner): 26.60g
●Total CO2 emissions (Hot runner): 19.55g

CO2 reduction rate using hot runner >>> 26.49％

* Product and runner values represent emissions per product. Recycled portions are not included.