■ Automotive Parts Molding

◇ Company A

Resin Used: HIPS
Molding Machine Capacity: 650 tons
Temperature: 230°C

Challenge:
When the black‑dot defect rate exceeded 10%, the machine had to be stopped for disassembly cleaning. This required substantial manual labor and cleaning time, so reducing these burdens was essential.

Verification Scope:
・Performed ecomaru purge once a day for approximately two weeks.
・Checked screw contamination before and after use and tracked the trend in defect rates.

Before Using ecomaru

After Approximately Two Weeks of Using ecomaru

⇒Carbonized deposits on the screw were significantly reduced.

Trend of Black‑Dot Defects While Using ecomaru

⇒The defect rate gradually decreased, stabilizing at around 2%. This behavior was similar to the typical pattern observed immediately after restarting the molding machine following disassembly cleaning.

Result:
A decrease in defect rate similar to that observed during disassembly cleaning confirmed that ecomaru’s purging performance can serve as an alternative to disassembly cleaning.
 
 

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