PET Preform Plastic Injection Mold for Water Bottle Manufacturing

Disposable PP Dessert Container: Precision Crafted via Injection Molding

Injection Molding Process for This PP Container

1. Material Preparation:

   PP pellets (no pre-drying needed) are fed into the injection machine, melted at 220–240°C (within PP’s 160–175°C melting range, below its 350°C decomposition point).
2. Mold Design & Clamping:

• The steel mold (cavity + core) is engineered with 50–90°C temperature control (higher for dimensional accuracy) and precise venting (0.025–0.038mm deep vents) to avoid air bubbles.

• The clamping unit applies 3800 t/m² force to seal the mold, preventing flash (excess plastic) during injection.

3. Injection & Packing:

   Molten PP is injected at 1500–1800 bar pressure (high speed to reduce stress) into the mold, filling the cavity (including the lid’s cloud-shaped groove). A 80% holding pressure ensures uniform wall thickness (critical for leak resistance).
4. Cooling & Ejection:

   Water-cooled channels in the mold solidify the PP in seconds; the finished container is ejected via pins (no damage to the semi-transparent surface). Post-processing (hot water treatment) prevents shrinkage.

Why Injection Molding Matters for This Product:

• Consistency: Each container matches tight tolerances (e.g., lid-seal fit) for universal usability.

• Complexity: Enables the integrated lid’s anti-leak structure and decorative groove—features hard to replicate with other processes (e.g., thermoforming).

• Cost-Effectiveness: Low per-unit cost at high volumes (ideal for cafes/dessert shops) while maintaining food safety standards.