A bottle forming route where PET preforms are heated, stretched and blown into final bottle shape inside a matched blow mold.
A bottle forming route where PET preforms are heated, stretched and blown into final bottle shape inside a matched blow mold.
Use the preform and bottle drawings to review stretching and blowing together. Ask which heating assumptions and trial-sample checks apply before accepting output for the proposed PET bottle.
Send bottle drawings, material, target output, mold scope and destination before engineering compares the machine and mold route.
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Preforms are fed and oriented, heated through an infrared lamp section to forming temperature, transferred into the closed blow mold, stretched axially by a stretch rod, expanded by high-pressure air against the cavity, cooled, and released to downstream handling. Each stage depends on preform quality, so the process is reviewed together with the preform route rather than in isolation.
Axial stretching before and during air expansion orients the PET in two directions. That biaxial orientation is what gives the finished bottle its clarity and wall strength, which is why the route is called stretch blow molding rather than simple blow molding.
The spelling differs by region but the process is the same. As a process family, stretch blow molding specifically starts from an injected preform and adds the stretch stage, which distinguishes it from extrusion blow molding routes that form the container directly from a parison.
Send bottle volume and drawing or sample, neck finish, material route, preform data if already fixed, target output and destination country. Real output on your bottle, lamp setup, air pressure and final bottle envelope remain engineering-confirmed until that data is reviewed.
Send bottle drawings, material, target output, mold scope and destination before engineering compares the machine and mold route.