PET Blow Molds for Bestcrown

The blow molding process starts with a heated preform. After the preform is placed in the mold cavity, a stretch rod and high-pressure air are used to form the bottle against the cavity surface. The condition of the cavity surface and the accuracy of the mold have a direct influence on the final bottle. For this reason, BJY pays close attention to cavity machining and surface finishing to support consistent bottle shape and wall thickness.

BJY manufactures the main mold body from solid aluminum bars rather than cast aluminum. This provides a stable material structure and good thermal conductivity, which are important for a mold used in repeated production cycles. The mold is precision-machined according to the required dimensions, and the finished units are inspected before delivery. Where required, Coordinate Measuring Machines (CMM) can be used to check key dimensions and ensure that the cavities meet the specified requirements.

Surface treatment is another part of the mold manufacturing process. BJY uses hard anodizing on the aluminum mold surface to improve surface protection and resistance to wear. During continuous production, the mold is repeatedly opened and closed, so protecting the working surfaces can help maintain their condition over time.

For beverage plants using Bestcrown equipment, a mold also needs to match the machine correctly. BJY checks the main dimensions, mounting areas, and air and water connections during production and inspection. Proper matching makes mold installation and replacement easier and helps avoid problems caused by dimensional deviations or incorrect connections.

For technical teams, the value of a blow mold is not only its initial machining accuracy but also how consistently it performs during regular production. By focusing on material selection, cavity machining, surface treatment, cooling, and machine compatibility, BJY provides PET blow molds designed for the practical requirements of Bestcrown rotary blow molding systems.