Multi Cavity Hot Runner Injection Mold - 32 Cavity Plastic Bottle Cap Mould Tooling Precision

This industrial-grade injection mold is specifically designed for mass production of plastic bottle caps (e.g., water bottle caps, beverage caps). It serves as a core forming tool in modern plastic packaging production lines. Featuring an advanced multi-cavity structure, this mold can simultaneously produce 32 high-quality caps in a single injection cycle, dramatically improving production efficiency and output capacity.

Alternative Names & Working Principle:​

This equipment is commonly referred to as a “bottle cap mold,” “beverage cap die,” or “multi-cavity injection mold.” Its working principle involves heating polymer granules (such as PP polypropylene or PE polyethylene) into a molten state via an injection molding machine, then injecting the melt under high pressure into the cavities of the mold. Inside the mold, the material solidifies through a cooling system, after which the ejector mechanism pushes out the finished products. The hot runner system installed at the top precisely controls the flow of molten plastic, ensuring uniform filling of every cavity, enabling continuous production with minimal or zero waste.

Material & Craftsmanship:​

The main body of the mold is constructed from high-hardness, wear-resistant special alloy steels such as P20, 718H, or H13. The surfaces undergo fine mirror polishing and nitriding treatment. This not only provides excellent corrosion resistance and abrasion resistance—ensuring a long service life—but also guarantees that the final plastic products have smooth, flawless surfaces without requiring additional post-processing steps. The metal parts exhibit a silver-gray industrial texture, and all structural components are assembled with precision.

Performance & Features:

· High Production Efficiency:​ The 32 cavities arranged in parallel significantly reduce per-unit manufacturing cost, making it ideal for large-volume orders.

· High Precision:​ Manufactured using CNC wire cutting and EDM technology, the clearance between cores and cavities is extremely small. This ensures precise thread dimensions on the caps, providing good sealing performance when tightened and preventing easy stripping.

· Excellent Cooling System:​ An optimized internal cooling channel network rapidly removes heat during the forming process, greatly shortening the cycle time.

· Pneumatic Ejection:​ The side-mounted pneumatic components enable fast, stable opening and closing actions, adapting well to high-speed automated production.

Technical Specifications Reference:

Applications:​

Widely used in the manufacturing of caps for drinking water, soft drinks, juices, cooking oils, and daily chemical products. It is the preferred equipment for packaging enterprises aiming for standardized and automated production.