Stacking geometry
Top and base design, wall thickness at the corners and load requirements drive the mold.
Industrial containers
Stackable Container Lines: Machine Configurations
Machine configurations for stackable industrial containers, with published specifications and what to define for stacking, handle and closure.
- Typical size
- 10–30 L
- Materials
- HDPE · Multi-layer HDPE
- Machine series
- HS · HT
- Suggested models
- 4
In short
Stackable Container: what to know
Stackable containers are square or rectangular cans designed to stack under load during storage and transport. They are made from HDPE on hydraulic servo extrusion blow molding machines such as the HSII-30L, with the stacking geometry tested on the filled container.
The application range describes hydraulic servo control, guided mold movement and optional view-strip or multi-layer arrangements. Stackability must be assessed on the finished container with its intended load.
Typical products
- 20–25 L stackable chemical containers
- Square edible oil containers
- Stackable cans with view stripes
Materials
- HDPE
- Multi-layer HDPE
Production process
How the production line works
- Step 01
Prepare the resin
Blow-molding grade resin, masterbatch and regrind are dosed to the product specification.
- Step 02
Extrude the parison
The extruder melts the material and the die head forms a hollow tube of controlled wall thickness.
- Step 03
Close and blow
The mold closes on the parison and compressed air forms the part against the cavity.
- Step 04
Cool and release
The part cools in the mold until it holds its shape, then the mold opens and the part is removed.
- Step 05
Trim and finish
Flash at the neck, handle and base is removed; necks are cut or reamed where required.
- Step 06
Inspect and pack
Weight, dimensions and leak tightness are checked before labeling and packing.
Selection guide
Choosing a machine
Wall distribution
Parison wall-thickness control keeps corners strong without adding weight.
Closure and handle
Neck position and handle design affect filling, pouring and the blow-pin layout.
Load testing
Plan stacking, drop and leak tests with the intended filled weight.
Machine configurations
Stackable Container line configurations
HSII-30L
≤ 30 LDouble-station electric-hydraulic extrusion blow molding for 20–30 L stackable jerry cans.
- Stations
- Double
- Clamping
- 300 kN
- Power
- 200 kW
HWII-30L
≤ 30 LDouble-station, tie-bar-less extrusion blow molding for 20–30 L stackable containers. Previously sold as the HTII-30L.
- Stations
- Double
- Clamping
- 250 kN
- Power
- 160 kW
HSII-20L
≤ 20 LDouble-station hydraulic servo extrusion blow molding for jerry cans and stackable containers up to 20 L, with a toggle clamping unit. The HSII-20L replaces the HSII-15L.
- Stations
- Double
- Clamping
- 220 kN
- Power
- 180 kW
HTII-18L
≤ 18 LDouble-station extrusion blow molding for stackable containers and PE water-bottle applications.
- Stations
- Double
- Clamping
- 158 kN
- Power
- 78.5 kW
| Model | Stations | Max. volume | Clamping force | Screw | Total power | Max. mold (W × H) | Datasheet |
|---|---|---|---|---|---|---|---|
| HSII-30L | Double | 30 L | 300 kN | 120 mm | 200 kW | 890 × 680 mm | PDF · 1.7 MB |
| HWII-30L | Double | 30 L | 250 kN | 100 mm | 160 kW | 680 × 830 mm | PDF · 1.5 MB |
| HSII-20L | Double | 20 L | 220 kN | 100 mm | 180 kW | 740 × 550 mm | PDF · 1.7 MB |
| HTII-18L | Double | 18 L | 158 kN | 90 mm | 78.5 kW | 690 × 540 mm | PDF · 1.4 MB |
Suggested starting points from the published range. The final configuration depends on your product drawing, resin, weight and output target.
Quotations, prices and project cases: Tongda stacking barrel machines on tongdamachine.net ↗
Video & product gallery
Stackable Container Blow Molding Machines
Watch on YouTubeMachine in operation
See the stackable container line running
Watch a Tongda machine producing this type of product, from parison extrusion to the finished part. For a video of a specific model or configuration, ask our team.
More machine videos
Questions from buyers
FAQ
Didn't find your answer?
Ask our engineersWhich Tongda machine makes 25 L stackable containers?
The HSII-30L double-station hydraulic servo machine is the reference model for 20–30 L stackable containers. The HWII-30L (formerly HTII-30L) is a tie-bar-less alternative.
How is the stacking strength ensured?
Through the container design, corner wall thickness and parison control, confirmed by stacking tests on the filled container.
Can stackable containers be multi-layer?
Yes. Multi-layer walls and view stripes can be configured. They are specified with the die head.
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