PET stretch blow mould
A stretch blow mould is what turns a preform into the bottle you sell. It is a different tool from the preform mould: the preform mould sets the weight and the neck, the stretch blow mould sets the shape, the base and the panel detail.
What this tooling is, and how it is quoted
AMAN cuts PET stretch blow tooling to the bottle you want and to the preform you already run. Send the bottle drawing, the preform you use and the machine details. If you do not have a preform yet, the preform mould is cut in the same workshop, so the two are designed against each other instead of being reconciled after the first samples.
The shape, the base and the panels are cut into the cavity, so what the tool has is what the bottle has. Blow moulds are delivered in 25–35 days from approved drawings. A stretch blow mold and a stretch blow mould are the same tool — the spelling follows the market you sell into.
PET stretch blow, running
Trial footage from PET stretch blow and preform lines in our own workshop, and the drawing for one preform-and-jar pair.
A PET programme needs two tools
Everything below is preform tooling — the other half of the same job, cut in the same workshop. The preform side has its own page.
Seven questions about the tool itself
The seven that decide whether you order, answered for this tooling. Where a figure is on the drawing we print it; where it depends on your part we say which numbers we will ask you for.
Hot runner or cold runner?
A stretch blow mould has no runner system: your preform arrives already moulded. What we design instead is the cavity, the base cup and the cooling, and the quotation describes those.
Cycle time and output
On a stretch blow tool the cycle belongs to the machine and the preform. Tell us the bottles per hour and the machine you run, and the cavity count is matched to it.
How the part is ejected
The bottle is released when the halves open and the base cup drops; there are no ejector pins on this tooling. The base design is what decides whether the bottle stands straight.
Tryout report and acceptance
The mould is fitted to a machine here and bottles are blown before it ships, and those bottles travel with it. Capacity to the fill line, base clearance and the wall distribution are the acceptance points.
Spare parts
Cavity halves, base cups and neck inserts are cut from the same drawings. Say which spares to pack.
Warranty
Warranty terms are written into the quotation for that tool.
Will it fit your machine?
This tooling is machine specific. Send the make and model of your stretch blow machine, the mould shell size and the pitch, and the tool is cut to it. Send the preform as well so the stretch ratio is checked.
What we will ask you for: the bottle drawing, the capacity and fill line, the preform you already use, the bottles per hour, and your stretch blow machine.
How many bottles an hour does the line have to make?
On a stretch blow tool that number sets the cavity count and the cooling, and it is also what decides whether your existing preform still suits the bottle. Tell us the output you are planning around.
Tell us your output targetFrequently asked questions
More from the same workshop: PET preform moulds · two colour PET preform moulds · every blow mould we cut.
Machines for these moulds: one-step PET injection stretch blow machines.
Send us your bottle drawing
Attach the bottle drawing and, if you have one, the preform you already run.
- ✓A drawing, a 3D file, or clear photos of the bottle
- ✓The preform you use, or its weight and neck finish
- ✓Whether the bottle is filled hot or cold, still or carbonated
- ✓The stretch blow machine it has to run on