دليل الطباعة ثلاثية الأبعاد من البولي كربونات (PC) - الإعدادات والنصائح واستكشاف الأخطاء وإصلاحها

Polycarbonate (PC) offers exceptional strength, heat resistance, and optical clarity—making it ideal for demanding applications. However, it’s also one of the most challenging materials to print. This guide covers everything you need to succeed with PC.

Why Print with Polycarbonate?

PC stands out for its exceptional properties:

• Heat resistance: Glass transition at 147°C
• Impact strength: Nearly unbreakable at room temperature
• Optical clarity: Transparent prints possible
• Dimensional stability: Low thermal expansion

PC-ABS blends offer easier printing while maintaining many benefits.

Essential Equipment

Hotend Requirements

PC requires high temperatures:

تحذير: PTFE-lined hotends cannot handle PC temperatures safely.

الضميمة

Non-negotiable for successful PC printing:

• Minimum: 50°C ambient temperature
• Optimal: 70-80°C chamber
• Purpose: Prevent warping, improve layer adhesion

Like ABS, PC requires thermal stability.

بناء السطح

Proven options:

1. PEI at 110-120°C — Most reliable
2. Garolite — Excellent for larger parts
3. PC sheet — Bond extremely well

Optimal Print Settings

درجة الحرارة

Speed and Layer Height

• Speed: 20-40mm/s recommended
• Layer height: 0.2mm minimum
• First layer: 50% speed

Cooling

• Minimum fan: 0-20%
• Never: Use maximum cooling
• Exception: Very small features

Troubleshooting Common Issues

الالتواء

Causes:

• Insufficient bed temperature
• Enclosure too cold
• Drafts from cooling

Solutions:

• Increase bed to 120°C
• Improve enclosure sealing
• Add draft shield in slicer

ضعف التصاق الطبقات

Causes:

• Nozzle too cold
• Cooling fan too high
• Layer time too long

Solutions:

• Increase nozzle 5-10°C
• Reduce or eliminate cooling
• Print multiple parts simultaneously

Bubbles/Pitting

Causes:

• Moisture in filament
• Temperature too high
• Filament degradation

Solutions:

• Dry filament at 80°C for 4 hours
• Reduce nozzle temperature
• Check for nozzle degradation

Special Techniques

Annealing PC Prints

Post-print heat treatment improves properties:

1. Place print in oven at 120°C
2. Hold for 30-60 minutes
3. Cool slowly in oven
4. Expect slight dimensional change

Bonding PC Parts

• Solvent welding: Methylene chloride (effective but toxic)
• Epoxy: Works well for most applications
• Friction welding: Creates strong bonds