1. Inadequate Heat Resistance 🔥

Symptoms:

• Mold deforms, softens, or even melts
• Cavity edges collapse or severe material overflow

Causes:

• Common printing materials (e.g., PLA, PETG) have low heat resistance, requiring special design adjustments

Recommended Materials:

• Best choice: High-temperature resins (e.g., Formlabs High Temp Resin), PA12 (Nylon), PEEK, PEI (Ultem), or other industrial-grade materials
• If using PLA or PETG: Increase wall thickness. Generally, the top should be 3–5 mm thick with 5–7 layers, and the base should be 3 mm to ensure clamping force without deformation when using woodworking clamps or screws

2. Insufficient Strength & Sealing

Symptoms:

• Material leakage or cracks at mold edges
• Mold breaks easily during clamping
• Mold is damaged or leaves residue after demolding

Causes:

• Weak points between 3D-printed layers
• Injection pressure exceeds the load capacity of the printed material

Solutions:

• Increase mold wall thickness (recommended ≥3 mm)