Examples of plastics field
- Injection molding unit comprises mechanical parts and a control part (including computers) Since the control part is recently improved in accuracy, the mechanical parts are the trouble issues.
- Contaminants (oil oxidation products) of oil cause problem.
- Malfunction of servo valves (intermittent interruption)
Oil oxidation products adhere firmly inside the gap causing valve lock, resulting in operational malfunction - Pump problem
Oil oxidation products clog suction strainers and line filters, causing cavitations phenomenon which in turn induces changes in flow rate and pressure.
EOC can eliminate oil oxidation products, which is impossible to do with filters, and maintain
the oil as clean as fresh oil. Thus, problem such as mentioned above are prevented.
Source: INJECTION MOLDING MAGAZINE (USA), February 1997
- Variation ranges of injection molding conditions before and after oil cleaning with EOC.
| Item | Before oil cleaning | 800 hours after oil cleaning |
|---|---|---|
| Cycle time variation range | 2seconds | 0.7seconds |
| Injection time variation range | 1.73seconds | 0.62seconds |
| Recovery time variationrange | 1.63seconds | 0.78seconds |
| Pressure variation range | 690PSI | 94PSI |
As a result, product failure rate was reduced to 1/6 of the pre-oil cleaning one.