72 Cavity PET Preform Mould Design & Manufacturing

The 72 cavity needle valve type preform mold is the core equipment for efficient production of PET preforms, designed specifically for fields such as carbonated beverages and food packaging. This mold adopts a needle valve hot runner system, which controls the opening and closing of the valve needle through a cylinder or hydraulic system to achieve precise filling of the melt, eliminate weld marks and bottom drawing problems, and ensure the surface smoothness of the preform. Its 72 cavity layout combines two-stage double-taper positioning technology, with each cavity independently self-locking, matched with an imported S136 stainless steel core and a P20 mold frame, ensuring mold quality and a lifespan of over 3 million molds.

The mold optimization design includes a spiral circulating cooling water channel, combined with an external cooling system, which can shorten the molding cycle to 18-20 seconds and increase production efficiency by nearly twice compared to traditional molds. The independent control technology of hot runner temperature avoids defects such as whitening at the bottom of the preform. And it supports international standard bottle mouth specifications such as PCO1810 and 30/25, widely used in various fields such as beverages and cosmetics, becoming the preferred solution for high-capacity and high-precision preform manufacturing.

The 72 cavity needle valve preform mold is a core solution for high-capacity PET preform production, widely used in carbonated beverages, mineral water, food packaging, and cosmetics. It adopts a needle valve hot runner system, which accurately controls the valve needle opening and closing through pneumatic or hydraulic drive. This design ensures uniform filling, eliminates weld marks and bottom defects, and improves the smoothness and transparency of preforms.

Each cavity applies a two-stage double taper positioning structure with independent self-locking, ensuring stable concentricity and precise alignment. The mold is manufactured with imported S136 stainless steel cores and a P20 mold frame, treated with hard chrome plating for enhanced wear resistance. With advanced heat treatment processes, the mold achieves a service life of more than 3 million cycles.

The hot runner system is equipped with temperature zoning control, providing accurate and stable heating. This prevents whitening at the bottom, maintains consistent wall thickness, and avoids material degradation. In addition, the spiral circulating cooling water channel, combined with an external cooling system, reduces the molding cycle to 18–20 seconds, increasing production efficiency by nearly double compared to traditional molds.

The mold supports international standard neck finishes such as PCO1810 and 30/25, with flexibility for customized weights and specifications. Designed with lightweighting in mind, it enables preforms with reduced material usage while ensuring sealing strength and durability. This balance of efficiency, precision, and adaptability makes the 72 cavity needle valve preform mold an ideal choice for modern packaging enterprises aiming to enhance productivity and reduce costs.

The 72 cavity needle valve preform mold is designed for long-term operational stability. Its robust construction and optimized material selection reduce maintenance frequency, while intelligent temperature control ensures consistent product quality across extended production runs. The mold’s adaptability allows manufacturers to meet varying market demands and bottle specifications without compromising speed or performance. By combining durability, energy efficiency, and reliable output, this mold supports sustainable production practices and provides packaging enterprises with a dependable solution for large-scale, high-precision preform manufacturing.