PET Bottle Mold

The PET bottle mold is CNC machined using high quality mold steel (such as S136, 7075 aerospace aluminum, etc.), with cavity surface tolerances controlled within ±0.01mm. It ensures high uniformity in capacity, size, and neck thread specifications for each bottle. The precision molding of the bottle neck sealing surface and thread structure directly meets the stringent requirements for leak-proof water, carbonated beverages, and creep resistance during filling. This stability not only reduces raw material waste but also helps customers obtain FDA, ISO, and other certifications, establishing brand quality reputation.

The PET bottle mold cavity is machined using high speed CNC precision engraving, achieving a repeatability of ±0.002mm. It effectively ensures the dimensional stability and surface finish of the mold cavity. Compared to traditional processing methods, it is particularly suitable for molding complex details such as bottle reinforcing ribs and bottom grooves. This precision directly improves the uniformity of the product's wall thickness, ensuring the bottle's sealing performance and appearance consistency on the filling line, meeting the standards for packaging containers in the food and beverage industry.

The vents in PET blow molding effectively expel air and residual gases from inside the PET bottle mold, resulting in a smooth and uniform bottle surface and significantly improving the product's transparency and appearance. This is crucial for products with high aesthetic requirements, such as drinking water bottles and beverage packaging, reducing defect rates and meeting market demands.

We are a professional manufacturer of PET bottle mold for bottled water, food packaging, edible oil packaging, and other applications. Welcome to inquire.

Bottled water

Food

Edible oil

Cosmetic

Medicine

Hand washing fluid

We establish close collaborative development partnership with clients. Clients can provide bottle samples or photos. Our design team can provide manufacturing feasibility analysis (DFM), offering professional advice on bottle design, mold release angles, parting line positions, etc., avoiding the time and cost waste caused by later modifications. This end-to-end collaborative model, combined with a modern CAD/CAM integrated design and manufacturing process, can significantly shorten the entire cycle from design to trial molding and PET bottle mold delivery. This helps clients' innovative products to be validated and launched to market faster, accurately capturing fleeting business opportunities and achieving a strategic layout one step ahead.

1,What is the PET bottle mold?

PET bottle blow molding mold is a forming tool used in the production of PET plastic bottles. Made of high-quality steel, it features precisely shaped internal cavity. In the PET blow molding process, PET preforms are first produced by PET injection molding. The heated PET preforms are placed inside the mold cavity. Under high pressure gas, it expands, tightly fitting the inner wall of the mold. After cooling and solidification, the final bottle body is formed.

2,How to choose the material for the mold?

In environments with high salinity or alkalinity, stainless steel (such as S136, H13, etc.) is recommended. For packaging industries requiring a high-quality finish, such as the cosmetics industry, H13 steel is recommended. For ordinary environments, aerospace-grade aluminum, 45# steel, etc., are recommended.

3,What are the advantages of using aerospace-grade aluminum molds?

The thermal conductivity of aerospace-grade aluminum alloys is significantly higher than that of mold steel, typically more than five times higher. During the blow molding process, the mold can transfer heat from the PET preform much faster, achieving rapid and uniform cooling and shaping. This not only significantly shortens the molding cycle (cooling time can be reduced by about 20%), but also effectively improves the crystallinity and dimensional stability of the bottle body, reduces bottle shrinkage and deformation, and ensures uniform bottle wall thickness, thereby producing higher quality PET bottles with better optical properties (more transparent).