The use of high-temperature grease in plastic injection molding machines is a critical application to ensure that the machine's bearings, screws, gears, and other moving parts operate safely and resist high heat. Particularly, the selection of appropriate grease is important for barrel and screw systems operating at high temperatures, mold heating elements, and gearboxes.
1. Why Use High-Temperature Grease?
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High Temperature Resistance
- Barrel and screw temperatures in injection machines can reach 200°C and above.
- Standard greases degrade at these temperatures, increasing friction and wear.
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Equipment Protection
- The right grease extends the life of bearings, gears, and screw systems.
- It resists carbonization and oxidation.
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Production Continuity
- Grease degradation or drying out → machine malfunctions and downtime.
- Using high-temperature grease reduces production interruptions.
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Food and Hygiene Standards
- If food packaging plastics are being produced, the use of food-grade (NSF H1) grease is critical for hygiene.
2. Areas of Use
| Part / Area | Recommended Grease Type | Description |
|---|---|---|
| Screw and Barrel Bearings | High-Temperature Food Grade Grease | Resistant up to 200–250°C |
| Gearboxes | High-Temperature Grease | Resistant to extreme loads and heat |
| Mold Movement Mechanisms | Food Grade Grease | Safe if there's a risk of food contact |
| Piston and Valve Mechanisms | Soft Food Grade Grease | Suitable for delicate mechanical parts |
| Conveyor Chains | Food Grade Chain Oil | Adhesive and water-resistant |
3. Points to Consider
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Grease Temperature Tolerance
- Grease suitable for the machine's maximum operating temperature should be selected.
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Oxidation Resistance
- Prevents degradation at high temperatures for extended periods.
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Correct Application and Maintenance
- Lubrication intervals should be determined; do not apply too much or too little grease.
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Food Grade Certification (NSF H1)
- Critically important in food packaging production.
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Prevention of Contamination Risk
- The risk of oil or grease contaminating the food product must be minimized.
Please contact us for technical support regarding solutions suitable for your business.
