Best Wide Mouth PET Blow Molding Machines for Jars and Containers

The SIAPI SW series is a line of two-stage linear stretch blow molding machines designed specifically for wide mouth PET containers with neck diameters from 63mm to 180mm and capacities from 1.5 to 12 liters. SW machines enable food, pharmaceutical, chemical, and pet food manufacturers to convert glass, HDPE, and metal jars to PET — reducing container weight, improving recyclability, and lowering logistics costs. All machines are fully electric with brushless motors and can be configured with the ARS blowing air recovery system. SIAPI manufactures all SW machines and molds in San Vendemiano, Italy.

Which blow molding machine handles wide mouth PET jars up to 180mm?

The SIAPI SW series is one of the few linear blow molding platforms on the market that produces PET containers with neck diameters as large as 180mm. Most standard blow molders are limited to narrow-neck bottle formats.

SW machines use an upside-down preform feeding system that allows full design flexibility for neck diameters up to 180mm with no jar weight limitation. The machine can be reconfigured for different neck finishes through a quick changeover process — no dedicated machine is required for each neck diameter.

Can PET jars replace glass, HDPE, and metal containers?

Yes. Wide mouth PET jars produced on SIAPI SW machines offer a direct replacement path for glass, HDPE, and metal containers across food, pharmaceutical, chemical, and pet food applications.

PET is lighter than glass, reducing shipping weight and breakage risk. PET is fully recyclable, unlike many multi-material metal containers. Compared to HDPE, PET offers better clarity and product visibility on shelf. SIAPI’s SW series gives manufacturers the ability to produce customized PET jar shapes that differentiate their products at retail.

What products are packaged in wide mouth PET containers?

• Food products: sauces, spreads, condiments, dry goods, snacks
• Pet food: treats, kibble, supplements
• Pharmaceutical and nutraceutical products
• Chemical products: cleaning agents, solvents
• Paints and varnishes
• Games and consumer goods with solid or semi-solid contents

What are the key specs of the SIAPI SW series?

See the specifications table below.

How does the SW series handle container changeover?

The container type is changed by replacing the mold and swapping preform carriers. Any quick adjustments for different preform types are made on-machine. The changeover process does not require dedicated tooling for each neck size — one SW machine can produce multiple jar formats across different neck diameters.

This flexibility makes the SW series particularly cost-effective for contract packagers and manufacturers running multiple SKUs on a single line.

Where are SIAPI wide mouth blow molders manufactured?

All SIAPI SW machines and molds are designed and manufactured at the company’s facility in San Vendemiano (Treviso), Italy. SIAPI has been part of CFT Group since 2019 and is a division of ATS Corporation (TSX: ATS, NYSE: ATS), operating within the Packaging, Food & Technology group.

SIAPI’s in-house R&D team works directly with customers on container design, preform development, and mold engineering before machine delivery — ensuring the container meets performance and shelf requirements before production begins.

Feature	Specification
Neck diameter range	63mm to 180mm
Container capacity	1.5 to 12 liters
Preform feeding	Upside-down system for large neck flexibility
Drive system	Fully electric with brushless motors
Stretch and clamping	Electrically driven for full process control
Air recovery	ARS system available (up to 50% air savings)
Handle options	Super Grip, HandleMatic external handle (optional)
Stackable base	Deep Bottom technology (optional)