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Melt Pumps in PC Lampshade Extrusion Production Lines

In the PC lampshade extrusion process, the role of the melt pump cannot be underestimated, yet many operators often encounter challenges during actual operation. These include issues such as unstable melt pressure leading to uneven product thickness, material leakage from the pump housing affecting the production environment, or excessive energy consumption driving up costs. Today, we’ll explore this seemingly simple yet crucial component from multiple perspectives.

The Core Function of the Melt Pump

The melt pump serves as a “pressure stabilizer” in PC lampshade extrusion production lines. It precisely controls melt pressure, eliminates screw pulsation in the extruder, and ensures a uniform and stable flow of material to the die. This is particularly important for temperature-sensitive engineering plastics like PC, as pressure fluctuations directly affect the product’s optical properties and dimensional accuracy.

Solutions to Common Challenges

Challenge 1: Significant Pressure Fluctuations

Check for excessive wear in the gear clearance

Verify that the pump body heating system is uniform

Appropriately increase melt temperature to reduce viscosity

Challenge 2: Material Leakage

Replace shaft seals regularly (recommended every 6 months)

Check the tightness of the pump body flange connections

Select high-temperature and corrosion-resistant sealing materials

Challenge 3: Excessive Energy Consumption

Optimize the match between pump speed and extruder output

Regularly clean carbon deposits inside the pump

Consider adopting a variable frequency drive system

Key Considerations for Selection and Maintenance

When selecting a melt pump, pay attention to the following:

The flow rate range must cover production requirements

Temperature resistance must meet PC processing temperatures (typically 260–300°C)

The material must be corrosion-resistant (nitrided steel or tool steel recommended)

Remember, a high-quality melt pump not only improves product quality but also extends mold life. We hope these tips will help those struggling with PC lampshade production! If you have specific questions, feel free to reach out anytime for discussion.

Email: sale@meltpump.com

WhatsApp: +86 158 3833 1071

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