Ripu Plastox — Industrial Plastic & Packaging Solutions

Processes / Blow Moulding

Blow Moulding,
Explained.

Every bottle, can and drum you've ever held was inflated like a balloon — inside a steel mould. Here's how our newest line (2025) does it, from 100 ml to 50 litres.

100ml–50L
Container Range
2025
New Line
IML
Compatible
Food
& Chemical Grade
1
Roof, Mould to Print

What is blow moulding?

Definition: Blow moulding is a manufacturing process for hollow plastic parts. A hot tube or preform of plastic is clamped inside a mould, and compressed air inflates it outward against the cavity walls — like blowing up a balloon inside a bottle-shaped box. When it cools, the plastic holds the mould's shape: a bottle, jerry can, drum or tank.

Ripu Plastox runs an injection-cum-blow line — a hybrid that injection-moulds a precise preform (giving a perfectly formed, leak-proof neck and thread) and then blows the body. You get injection-moulding precision where it matters most — the neck finish that seals against the cap — and blow-moulding efficiency for the body.

The line was commissioned in 2025, extending our range from solid moulded parts into complete container programmes: the bottle, the closure, the label and the print, all from one plant.

How blow moulding works — step by step

01

Preform moulding

A test-tube-shaped preform is injection moulded from HDPE, PP or PET — with the neck and thread formed to final precision in this step.

02

Conditioning

The preform is brought to the exact temperature window where the polymer stretches evenly — too cold and it splits, too hot and the walls thin unevenly.

03

Inflation

The preform is clamped inside the container-shaped mould and compressed air inflates it against the chilled cavity walls in a fraction of a second.

04

Cooling

The new container cools against the mould until rigid — wall thickness distribution is monitored so the base, walls and shoulders all meet spec.

05

Trimming & leak testing

Any excess material is trimmed, and containers are leak-tested — every container that will hold liquid must prove it.

06

Decoration & packing

Containers move straight to IML, dry offset or screen printing, then QC and despatch — no second factory, no transit.

Specifications

ParameterRipu Plastox Capability
ProcessInjection-cum-blow moulding (precision necks + blown bodies)
Capacity range100 ml to 50 L
MaterialsHDPE, PP, PET — food-grade & chemical-grade with traceability
BrandingIML-compatible · dry offset · screen print, all in-house
ProductsBottles, jerry cans, drums, narrow-neck packs, chemical containers

What it's used for

Chemical & solvent bottlesLubricant packsAgro-chemical containersJerry cansIndustrial drumsF&B containers

Frequently asked questions

Injection moulding vs blow moulding — what's the difference?
Injection moulding fills a mould completely to make solid parts; blow moulding inflates hot plastic against the mould walls to make hollow parts. Solid part = injection; hollow container = blow.
What sizes can be blow moulded?
Our 2025 injection-cum-blow line produces containers from 100 ml dosing bottles up to 50-litre drums and jerry cans.
Are the containers food-safe?
Yes — with food-grade HDPE, PP or PET and batch traceability documentation. Chemical-grade variants cover solvents, lubricants and agrochemicals.
Can the containers be branded?
Yes — in-mould labels fused during moulding, or dry offset / screen printing afterwards, all under the same roof.

Have a container in mind?

Tell us the volume, the contents and the branding — we'll quote the complete container programme within 24 hours.

Get a Quote